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Shenzhen Glida Electronics Co., Ltd is a high-tech green energy enterprise including Research & Development, Production and Sales with total amount of existing staff nearly 800.The headquarter locates in Shenzhen Baoan center are where close to Hong Hong,Guangzhou,Zhuhai,Macao etc. economic developed city, Glida has become the largest domestic technology and most advanced Lithium Battery Manufacturer. Since its establishment, the brand " GLIDA " has received recognition from 300 industrial enterprises and established good relationship with them. Our products such as Li-ion 18650 batteries, Li-polymer batteries, Smart batteries, Prismatic batteries,LiFePO4 batteries, Energy storage batteries, Ni-MH batteries and chargers are widely used in Medical equipments, Industrial equipments, Lighting, Security and protection, Surveying and mapping equipments, Hand-held terminals, GPS navigator, Portable power tools, Set Top Box, Electronic toys and other fields. Based on international mindset, forward-looking vision and high starting point , Glida has gathered a group of battery experts with rich experience. Meanwhile, we follow the ISO9001:2008 system operation strictly. Glida insists our " core " from each cell and with the aim of creating bright future with our customers from all over the world.

Test Your Battery Voltage with a Voltmeter A voltmeter, which is popular among rechargeable batteries, is the next technique. 1)Be sure to remove your battery from the device. 2)Remove the positive terminal cover for the battery. Check for any corrosion in the terminal and clean it off if necessary. You would then want to connect the positive lead on your voltmeter to your battery`s positive lead. After that, following the same steps you did for the positive end, attach the negative voltmeter leading to the negative battery terminal. Now, you`re all set to check the readings on the voltmeter. 3)Check your readings. Usually, a fully charged battery would display a voltmeter reading of around 1.5 volts. That means your battery is in good shape if your voltmeter shows a voltage anywhere between 1.3-1.5 volts. 4)A strong indication that your battery has excessive voltage is any voltage above 1.5volts. Switch on the high beams to reduce excessive surface voltage charges, if that`s the case. 5)Charge your battery if it shows a voltage below 1.3 on the voltmeter. But if the voltmeter reads anything below 1.2 volts, your battery should consider [trickle charging." This simply means that your battery will be charged at a much slower rate, allowing you to avoid the risk of applying excess charge amperage that could cause a lot of excess heat and off-gassing (and explosions in extreme cases). What is the voltage of a fully charged NiMH battery? It all depends on the battery and the method of charging. Generally, rapid charging generates higher voltages. It is charging Energizer 2100 NiMH AAs in one-hour results, typically in a cell voltage of 1.4-1.45V. However, a 3000 mAh SC pack typically yields a 1.35-1.4V cell voltage after a 2-hour load. At what voltage is a NiMH battery empty? The NiMH battery`s discharge voltage profile is called [flat," which varies with the rate and temperature. The voltage starts at around 1.5 volts as a fully charged battery is discharged, followed by a sharp drop to about 1.3 volts. The voltage for about 75 percent of the profile stays between 1.3 and 1.2 volts before a second abrupt decrease in voltage occurs as the battery`s usable power starts and deplete. At this point, the discharge current (or load) is terminated at a safe voltage level. With high discharge rates, losses in ohmic polarizations (internal resistance) decrease the entire discharge profile. The discharge profile is elevated at high temperatures by increasing the potential (voltage) between the electrodes. Concentration polarisation dramatically reduces the voltage and available power at temperatures below 10 ° C ( 50 ° F). This is triggered by an increase in the energy required inside the battery to move molecules. For the rated voltage of a NiMH cell, the industry norm is 1.2 volts. This value is the nominal voltage of a cell, which is discharged at a temperature of 25 ° C (77 ° F) at a rate of C/10 to a final voltage of 1.0 volts. The rated voltage of battery packs is mostly used to point out this industry standard. The Final Verdict That`s it, what you are up to go and check now the voltage of your NiMH battery! NiMH batteries have several benefits, which operate on the same 1.2 volts, which are much greater. These batteries are even more environmentally conscious than others. Hopefully, this detailed guide on how to check NiMH battery voltage, the voltage of a fully charged battery, and what voltage NIMH battery are empty will enrich your knowledge.

Do you have a NiMH battery? Or you might be keenly interested to know about NiMH battery voltage. If your answer is yes, then this illustrative guide id for you!!! A NiMH or nickel-metal hydride battery is a type of rechargeable battery. The positive electrode chemical reaction is similar to that of the nickel-cadmium (NiCd) cell, all of which use nickel oxide (NiOOH) hydroxide. However, in place of cadmium, the negative electrodes use a hydrogen-absorbing metal. The power of a NiMH battery can be two to three times that of an equal NiCd size. Its energy density can be similar to that of a lithium-ion battery. If you have questions about checking the voltage range and what`s nice for you, this informative guide helps you know more about NiMH batteries. How do you check the NiMH battery voltage? Rechargeable battery systems, such as NiMH batteries, use an ionic chemical paste that provides the battery with charging functionality and a full-scale charge. It is always supposed to be bought entirely with a non-rechargeable battery and discarded after it is depleted. It`s hard to figure out if the older one supports a full charge with rechargeable batteries. To see if a rechargeable battery recognizes a complete charge, here are two ways to test the NiMH battery`s voltage. Basic Voltage Check with a Multimeter A simple method to monitor your battery`s voltage requires the use of a multimeter that calculates the electrical difference between two points in an electrical circuit. Use a digital multimeter for an easy method. 1)Place your rechargeable battery in its approved battery charger and allow the device to charge for the period prescribed. 2)Switch your multimeter on and change the measurement dial to measure direct voltage, ensuring that the dial is adjusted to measure at least the full number of volts that the battery can provide. Set the dial to calculate the next-higher voltage number if your multimeter setting matches the number of volts your battery offers. 3)Tap the metal tip of the meter`s black probe wire to the battery`s negative-) (end or end, and then tap the metal tip of the meter`s red probe wire to the battery`s positive (+) end or end. Observe the voltage reading on your multimeter`s monitor when pressing them to the battery.

Core component of lithium ion battery: Cell, BMS, Structural Component Product liability insurance: Product liability insurance of Ping An Insurance (Group) Company, RMB30 million, Policy Certificate No: 10590003900575009566 Cell:Apply the cell of well-known international brands and self-developed special cell of GLIDA BMS:Adopts imported components with multiple protection functions of communication, equilibrium, reverse charging, temperature protection, overcharging, over-discharging, over-current and short circuit Structure and process design:Based on users` requirements, we adopt process of explosion-proof, waterproof, dustproof, flame retardant, triaxial vibration, multi-point molding junction, film heating and heat balance management to ensure the security, reliability and stability of the product. The World's Leading Manufacturer Of Custom Lithium Ion Battery Pack GLIDA is a Chinese high-tech enterprise which dedicated to the R&D, manufacture and sales of rechargeable lithium ion battery packs. GLIDA was founded in 2006, with its factory in Shenzhen,Guangdong, China. Since its establishment, Shenzhen Glida is committed to serve global portable power bank, storage energy battery pack, power battery pack, backup battery pack and special usage battery users. During 15 years development, GLIDA has become a world's leading supplier of lithium ion battery pack.

GLIDA-A40 is a multifunctional energy storage power supply. It has AC 110V/220V sine wave AC output, and the output frequency is optional; two DC12V outputs (DC5.5×2.1) and one cigarette lighter 12V output, the total output current is up to 10A; two USB5V/2.4A outputs and Two-way USB fast charge output, support DCP/QC2.0/QC3.0/FCP/AFC protocol, maximum output 18W; two-way TYPE-C PD 65W output. AC output has over-current protection, short-circuit protection, over-temperature protection; DC output over-current protection, short-circuit protection; USB output over-current protection, short-circuit protection, over-temperature protection; battery pack over-discharge protection, over-charge protection, over-current protection, Short circuit protection, high temperature and low temperature protection. BMS overcharge secondary protection (not by default, this function is optional). LED 3W strong light flashlight. LCD liquid crystal display, showing input power, output power, abnormal code, warning icon, remaining available time and remaining charging time. Support solar charging, maximum 150W, with MPPT function. PC+ABS UL94-V0 fireproof enclosure. Battery pack: 21700 lithium battery, 4800mAh battery, 3.6V, 6 series and 5 parallel, with a total capacity of 518.4Wh. Charging time: 0.2C charging, solar input 4H, DC input fast charging 8H, slow charging 12H; Cycle times: 500-800 times, the capacity after 500 times is greater than or equal to 80% of the original capacity.

Professional battery pack OEM/ODM from Shenzhen,China-GLIDA Good day! This is Andy Cheng who is the sales engineer from Shezhen Glida, professional lithium battery manufacturer since 2007. Glida is a Professional Battery Manufacturer over 10 years with ISO, CE, ROHS, UL certificates etc. www.szglida.com; We provide high quality lithium battery pack and OEM/ODM according to customer's requirement. Glad to see your great company product and services is in major of medical/industrial/consumer electroncis/tools/solar power devices with battery projects. Glida could make them with good quality and favorable price for your supply chain. Could we work with you on this projects,become your optional OEM/ODM partner?This will help to boost your battery business in near future.Welcome inquiry us with more information. Shenzhen Glida Electronics Co., Ltd is a high-tech green energy enterprise including Research & Development, Production and Sales with total amount of existing staff nearly 800.The headquarter locates in Shenzhen Baoan center are where close to Hong Hong,Guangzhou,Zhuhai,Macao etc. economic developed city, Glida has become the largest domestic technology and most advanced Lithium Battery Manufacturer. Since its establishment, the brand " GLIDA " has received recognition from 300 industrial enterprises and established good relationship with them. Our products such as Li-ion 18650 batteries, Li-polymer batteries, Smart batteries, Prismatic batteries,LiFePO4 batteries, Energy storage batteries, Ni-MH batteries and chargers are widely used in Medical equipments, Industrial equipments, Lighting, Security and protection, Surveying and mapping equipments, Hand-held terminals, GPS navigator, Portable power tools, Set Top Box, Electronic toys and other fields. Based on international mindset, forward-looking vision and high starting point , Glida has gathered a group of battery experts with rich experience. Meanwhile, we follow the ISO9001:2008 system operation strictly. Glida insists our " core " from each cell and with the aim of creating bright future with our customers from all over the world.

Shenzhen Glida Electronics Co., Ltd is a high-tech green energy enterprise including Research & Development, Production and Sales with total amount of existing staff nearly 800.The headquarter locates in Shenzhen Baoan center are where close to Hong Hong,Guangzhou,Zhuhai,Macao etc. economic developed city, Glida has become the largest domestic technology and most advanced Lithium Battery Manufacturer. Since its establishment, the brand " GLIDA " has received recognition from 300 industrial enterprises and established good relationship with them. Our products such as Li-ion 18650 batteries, Li-polymer batteries, Smart batteries, Prismatic batteries,LiFePO4 batteries, Energy storage batteries, Ni-MH batteries and chargers are widely used in Medical equipments, Industrial equipments, Lighting, Security and protection, Surveying and mapping equipments, Hand-held terminals, GPS navigator, Portable power tools, Set Top Box, Electronic toys and other fields. Based on international mindset, forward-looking vision and high starting point , Glida has gathered a group of battery experts with rich experience. Meanwhile, we follow the ISO9001:2008 system operation strictly. Glida insists our " core " from each cell and with the aim of creating bright future with our customers from all over the world.

Because lithium iron phosphate power batteries have the above characteristics, and produce batteries of various capacities, they are soon widely used. Its main application areas are: Large electric vehicles: buses, electric vehicles, sightseeing vehicles and hybrid vehicles, etc.; Light electric vehicles: electric bicycles, golf carts, small flat-panel battery vehicles, forklifts, cleaning vehicles, electric wheelchairs, etc.; Power tools: electric drills, chainsaws, lawn mowers, etc.; Remote control cars, boats, airplanes and other toys; Energy storage equipment for solar and wind power generation; UPS and emergency lights, warning lights and miner's lights (safety **); Substitute 3V primary lithium battery and 9V nickel-cadmium or nickel-metal hydride rechargeable battery in camera (same size); Small medical equipment and portable equipment, etc. Here is an application example of replacing lead-acid batteries with lithium iron phosphate power batteries. Using 36V/10Ah (360Wh) lead-acid battery, its weight is 12kg, it can travel about 50km on a single charge, the number of charging times is about 100 times, and the use time is about 1 year. If the lithium iron phosphate power battery is used, the same 360Wh energy (composed of 12 10Ah batteries in series) is used, and its weight is about 4kg. It can travel about 80km once charged, and the number of charging times can reach 1,000. The service life can reach 3 to 5 years. Although the price of lithium iron phosphate power batteries is much higher than that of lead-acid batteries, the overall economic effect is better to use lithium iron phosphate power batteries, and it is lighter in use.

Improvements in safety performance The P-O bond in the lithium iron phosphate crystal is stable and difficult to decompose. Even at high temperature or overcharge, it will not collapse and generate heat like lithium cobalt oxide or form strong oxidizing substances, so it has good safety. A report pointed out that in the actual operation, a small number of samples were found to be burning in the acupuncture or short-circuit experiments, but no explosion occurred. In the overcharge experiment, a high voltage charging that was many times higher than the self-discharge voltage was used, and it was found that there were still explosion phenomenon. Even so, its overcharge safety has been greatly improved compared with ordinary liquid electrolyte lithium cobalt oxide batteries. improvement in lifespan Lithium iron phosphate battery refers to a lithium ion battery that uses lithium iron phosphate as a positive electrode material. The cycle life of a long-life lead-acid battery is about 300 times, and the maximum is 500 times, while the lithium iron phosphate power battery has a cycle life of more than 2,000 times, and can be used for 2,000 times with standard charging (5-hour rate). The lead-acid battery of the same quality is "new half year, old half year, maintenance and maintenance for half a year", at most 1~1.5 years, and lithium iron phosphate battery is used under the same conditions, the theoretical life will reach 7~8 years. Comprehensive consideration, the performance-price ratio is theoretically more than 4 times that of lead-acid batteries. High-current discharge can quickly charge and discharge high-current 2C. Under the special charger, the battery can be fully charged within 40 minutes of 1.5C charging, and the starting current can reach 2C, while lead-acid batteries have no such performance. Good high temperature performance The electric heating peak of lithium iron phosphate can reach 350℃-500℃, while lithium manganate and lithium cobaltate are only around 200℃. Wide operating temperature range (-20C--+75C), with high temperature resistance, the electric heating peak of lithium iron phosphate can reach 350℃-500℃, while lithium manganate and lithium cobaltate are only around 200℃. High capacity Has a larger capacity than ordinary batteries (lead-acid, etc.). 5AH-1000AH (single) no memory effect Rechargeable batteries often work under the condition of being fully charged, and the capacity will quickly drop below the rated capacity. This phenomenon is called the memory effect. Like nickel-metal hydride and nickel-cadmium batteries, there is memory, but lithium iron phosphate batteries do not have this phenomenon. No matter what state the battery is in, it can be used at any time without having to discharge it before charging. light weight The volume of the lithium iron phosphate battery with the same specification and capacity is 2/3 of the volume of the lead-acid battery, and the weight is 1/3 of the lead-acid battery. Environmental friendly The battery is generally considered to be free of any heavy metals and rare metals (nickel-metal hydride batteries require rare metals), non-toxic (SGS certification passed), non-polluting, in line with European RoHS regulations, and is the only green battery certificate. Therefore, the reason why the lithium battery is favored by the industry is mainly due to environmental protection considerations. Therefore, the battery has been included in the "863" national high-tech development plan during the "Tenth Five-Year Plan" period, and has become a key project supported and encouraged by the state. With China's entry into the WTO, the export volume of China's electric bicycles will increase rapidly, and electric bicycles entering Europe and the United States have been required to be equipped with non-polluting batteries. However, some experts said that the environmental pollution caused by lead-acid batteries mainly occurs in the non-standard production process and recycling process of enterprises. In the same way, lithium batteries belong to the new energy industry, but it cannot avoid the problem of heavy metal pollution. Lead, arsenic, cadmium, mercury, chromium, etc. in the processing of metal materials may be released into dust and water. The battery itself is a chemical substance, so it may cause two kinds of pollution: one is the process waste pollution in the production project; the other is the battery pollution after scrapping. Lithium iron phosphate batteries also have their shortcomings: for example, low temperature performance is poor, the tap density of positive electrode materials is low, and the volume of lithium iron phosphate batteries of equal capacity is larger than that of lithium ion batteries such as lithium cobalt oxide, so it has no advantages in micro batteries. When used in power batteries, lithium iron phosphate batteries, like other batteries, need to face the problem of battery consistency. Comparison of power batteries At present, the most promising cathode materials for power lithium-ion batteries are mainly modified lithium manganate (LiMn2O4), lithium iron phosphate (LiFePO4) and nickel cobalt lithium manganate (Li(Ni,Co,Mn)O2) ternary Material. Nickel-cobalt lithium manganate ternary material is generally considered to be difficult to become the mainstream of power lithium-ion batteries for electric vehicles due to the lack of cobalt resources, high nickel and cobalt formation and large price fluctuations, but it can be combined with spinel manganic acid. Lithium is used in combination within a certain range. Industry application Carbon-coated aluminum foil brings technological innovation and industrial improvement to the lithium battery industry Improve the performance of lithium battery products and improve the discharge rate [1] With the increasing requirements of domestic battery manufacturers for battery performance, new energy battery materials are generally recognized in China: conductive materials & conductive coated aluminum foil/copper foil. Its advantages are: when dealing with battery materials, it often has good high-rate charge-discharge performance and large specific capacity, but has poor cycle stability and serious attenuation, and has to make a choice. Product application, in the golf cart battery pack Product application, in the golf cart battery pack This is a magical coating that improves the performance of the battery and brings it into a new era. The conductive coating is composed of dispersed nano-conductive graphite-coated particles, etc. It provides excellent static conductivity and is a protective energy absorbing layer. It also provides good coverage protection. Coatings are water- and solvent-based and can be applied to aluminum, copper, stainless steel, aluminum and titanium bipolar plates. Carbon coating brings the following improvements to the performance of lithium batteries 1. Reduce the internal resistance of the battery and suppress the increase of the dynamic internal resistance during the charging and discharging cycle; 2. Significantly improve the consistency of the battery pack and reduce the cost of the battery pack; 3. Improve the adhesion between the active material and the current collector, and reduce the manufacturing cost of the pole piece; 4. Reduce polarization, improve rate performance, and reduce thermal effect; 5. Prevent the corrosion of the current collector by the electrolyte; 6. Comprehensive factors to extend battery life. 7. Coating thickness: conventional single-sided thickness of 1 ~ 3μm. In recent years, Japan and South Korea have mainly developed power lithium-ion batteries with modified lithium manganate and nickel-cobalt lithium manganate ternary materials as cathode materials, such as Panasonic EV Energy, a joint venture established by Toyota and Panasonic, Hitachi, Sony, New Kobe Electric, NEC, Sanyo Electric, Samsung and LG, etc. The United States mainly develops power-type lithium-ion batteries with lithium iron phosphate as the positive electrode material, such as A123 Systems Company and Valence Company, but major American auto manufacturers choose manganese-based positive electrode material system power-type lithium-ion batteries in their PHEVs and EVs. And it is said that the American A123 company is considering entering the field of lithium manganate materials, while Germany and other European countries mainly adopt the way of cooperation with other countries' battery companies to develop electric vehicles, such as Daimler Benz and the French Saft Alliance, Germany Volkswagen and Japan's Sanyo Agreement cooperation Wait. At present, Germany's Volkswagen and France's Renault are also developing and producing power lithium-ion batteries with the support of their governments.

Whether a material has application development potential, in addition to focusing on its advantages, it is more critical whether the material has fundamental defects. Lithium iron phosphate is now generally chosen as the positive electrode material of power lithium-ion batteries in China. Market analysts from the government, scientific research institutions, enterprises and even securities companies are optimistic about this material and regard it as the development direction of power lithium-ion batteries. There are two main reasons to analyze the reasons: First, under the influence of the research and development direction of the United States, the American Valence and A123 companies were the first to use lithium iron phosphate as the positive electrode material for lithium-ion batteries. Secondly, there is no lithium manganate material with good high temperature cycle and storage performance that can be used in power lithium-ion batteries in China. However, lithium iron phosphate also has fundamental defects that cannot be ignored, which can be summed up as follows: 1. During the sintering process during the preparation of lithium iron phosphate, iron oxide may be reduced to elemental iron in a high-temperature reducing atmosphere. Elemental iron can cause micro-short circuit of the battery and is the most taboo substance in the battery. This is also the main reason why Japan has not used this material as a positive electrode material for power lithium-ion batteries. 2. Lithium iron phosphate has some performance defects, such as low tap density and compaction density, resulting in low energy density of lithium-ion batteries. The low temperature performance is poor, and even nano-encapsulation and carbon coating did not solve this problem. When Dr. Don Hillebrand, director of the Energy Storage System Center of Argonne National Laboratory in the United States, talked about the low temperature performance of lithium iron phosphate batteries, he described it as terrible. It is not possible to drive an electric vehicle at low temperature (below 0°C). Although some manufacturers claim that the capacity retention rate of lithium iron phosphate batteries is good at low temperatures, that is when the discharge current is small and the discharge cut-off voltage is very low. In this condition, the device cannot start working at all. 3. The material preparation cost and the battery manufacturing cost are high, the battery yield is low, and the consistency is poor. Although the nanoscale and carbon coating of lithium iron phosphate improves the electrochemical performance of the material, it also brings other problems, such as the reduction of energy density, the increase of synthesis cost, poor electrode processing performance, and harsh environmental requirements. Although the chemical elements Li, Fe and P in lithium iron phosphate are very rich and the cost is low, the cost of the prepared lithium iron phosphate product is not low. Even if the early research and development costs are removed, the process cost of the material is relatively high. The cost of preparing the battery will make the final cost per unit of energy storage higher. 4. Poor product consistency. At present, there is no lithium iron phosphate material factory in China that can solve this problem. From the perspective of material preparation, the synthesis reaction of lithium iron phosphate is a complex heterogeneous reaction, including solid phase phosphate, iron oxide and lithium salt, plus carbon precursor and reducing gas phase. In this complex reaction process, it is difficult to ensure the consistency of the reaction. 5. Intellectual property issues. The earliest patent application for lithium iron phosphate was obtained by F X MITTERMAIER & SOEHNE OHG (DE) on June 25, 1993, and the application results were announced on August 19 of the same year. The basic patent of lithium iron phosphate is owned by the University of Texas, and the carbon coating patent is applied by Canadians. These two basic patents cannot be bypassed. If the patent royalty is included in the cost, the product cost will be further increased. In addition, from the experience of R&D and production of lithium-ion batteries, Japan is the first country to commercialize lithium-ion batteries, and has been occupying the high-end lithium-ion battery market. Although the United States is leading in some basic research, so far there is no large-scale lithium-ion battery manufacturer. Therefore, it is more reasonable for Japan to choose modified lithium manganate as the positive electrode material of power lithium-ion battery. Even in the United States, the number of manufacturers using lithium iron phosphate and lithium manganate as cathode materials for power lithium-ion batteries is equally divided, and the federal government supports the research and development of these two systems at the same time. In view of the above problems of lithium iron phosphate, it is difficult to be widely used as a positive electrode material for power lithium-ion batteries in new energy vehicles and other fields. If the problems of high temperature cycling and poor storage performance of lithium manganate can be solved, with its advantages of low cost and high rate performance, the application in power lithium-ion batteries will have great potential.

The full name of lithium iron phosphate battery is lithium iron phosphate lithium ion battery, abbreviated as lithium iron phosphate battery. Because its performance is particularly suitable for power applications, the word "power" is added to the name, that is, lithium iron phosphate power battery. Some people also call it "lithium iron (LiFe) power battery". significance In the metal trading market, cobalt (Co) is the most expensive, and there is not much storage, nickel (Ni) and manganese (Mn) are cheaper, and iron (Fe) is the cheapest. The prices of cathode materials are also in line with those of these metals. Therefore, lithium-ion batteries made of LiFePO4 cathode material should be the cheapest. Another feature of it is that it does not pollute the environment. As a rechargeable battery, the requirements are: high capacity, high output voltage, good charge and discharge cycle performance, stable output voltage, high current charge and discharge, electrochemical stability, and safety in use (not due to overcharge, overdischarge and short circuit) It can cause combustion or explosion due to improper operation), wide operating temperature range, non-toxic or less toxic, and no pollution to the environment. The lithium iron phosphate battery using LiFePO4 as the positive electrode has good performance requirements, especially in terms of large discharge rate discharge (5-10C discharge), stable discharge voltage, safety (non-burning, non-exploding), life (cycle times) ), in terms of no pollution to the environment, it is the best and the best high-current output power battery at present. Structure and working principle The internal structure of the LiFePO4 battery is shown in Figure 1. On the left is the peridot structure LiFePO4 is used as the positive electrode of the battery. It is connected to the positive electrode of the battery by an aluminum foil. The middle is a polymer separator, which separates the positive electrode from the negative electrode, but the lithium ion Li+ can pass through but the electron e- cannot pass through. The right side is composed of carbon (graphite). The negative electrode of the battery is connected to the negative electrode of the battery by copper foil. Between the upper and lower ends of the battery is the electrolyte of the battery, and the battery is hermetically sealed by a metal casing. When LiFePO4 battery is charged, the lithium ion Li+ in the positive electrode migrates to the negative electrode through the polymer separator; during the discharge process, the lithium ion Li+ in the negative electrode migrates to the positive electrode through the separator. Lithium-ion batteries are named after lithium ions migrate back and forth during charging and discharging.

Shenzhen Guanlida Electronics Co., Ltd. is a national high-tech enterprise integrating independent research and development, production and sales of lithium-ion battery modules. Its headquarters is located in Shenzhen, Guangdong Province, which is at the forefront of reform and opening up. Technological innovation and all-round service are at the top level, laying a leading position in the domestic industry. The company has a number of lithium battery PACK production lines, aging, capacity distribution and other production equipment and a large number of experienced industrial workers. The combination of exquisite craftsmanship and scientific process ensures the qualified quality of each (off-line) product. The company has built a large battery testing center, and the advanced battery testing equipment has become a reliable guarantee for "safe battery". Therefore, the company's products have passed the certification of many authoritative organizations at home and abroad, and become an excellent representative enterprise of lithium-ion battery module product reliability. The company has been adhering to the corporate culture of "customer-centric" for many years, based on the precise positioning of "customization of lithium batteries", gathered a group of lithium battery industry experts, and established a number of departments and systems including electrochemistry, electronics, technology, structure, etc. The company's technological innovation capability can fully meet the diversified and personalized needs of customers. The company's products are widely used in aerospace, military, communications, consumer electronics and other fields, and the service network is all over the country. Approved by more than 300 enterprise users. Shenzhen Guanlida Electronics Co., Ltd. adheres to the business philosophy of "a good battery starts from the 'core'", is committed to dedicating super value to customers, and looks forward to working with customers at home and abroad to create a better future.

Ternary polymer lithium battery refers to a lithium battery whose positive electrode material uses nickel cobalt lithium manganate (Li(NiCoMn)O2) ternary positive electrode material. The ternary composite positive electrode material is made of nickel salt, cobalt salt and manganese salt as raw materials. The ratio of nickel, cobalt and manganese can be adjusted according to actual needs. The battery with ternary material as the positive electrode is more safe than lithium cobalt oxide battery, but the voltage is too low, and it will be obviously used in mobile phones (the cut-off voltage of mobile phones is generally around 3.0V). feeling of insufficient capacity. Ternary polymer lithium battery refers to a lithium battery whose positive electrode material uses lithium nickel cobalt manganese ternary positive electrode material. There are many kinds of positive electrode materials for lithium ion batteries, mainly lithium cobalt oxide, lithium manganate, lithium nickel oxide, and ternary materials. , lithium iron phosphate, etc. At present, the batteries of ternary materials have replaced the lithium cobalt oxide batteries that were widely used before, and are widely used in the field of notebook batteries. Nominal capacity: 1250mAh Standard discharge continuous current: 0.2C Maximum discharge continuous current: 1C Discharge: -10~60℃ Product size: MAX9.5*35*52mm Internal resistance of finished product: ≤150mΩ Lead model: national standard line UL1007/24#, line length 55mm Protection parameters: overcharge protection voltage/4.325±0.025V per string Over discharge protection voltage 2.5±0.05V Overcurrent value: 2~6A or 3-8A Materials that are relatively balanced in terms of capacity and safety have better cycle performance than normal lithium cobalt oxide. In the early stage, due to technical reasons, the nominal voltage was only 3.5-3.6V, which limited the scope of use. With continuous improvement and perfect structure, the nominal voltage of the battery has reached 3.7V, and the capacity has reached or exceeded the level of lithium cobalt oxide battery. The world's top 5 battery cell brands SANYO, PANASONIC, SONY, LG, SAMSUNG have launched ternary material batteries, and quite a few notebook battery lines have replaced the previous lithium cobalt oxide batteries with ternary material batteries, SANYO, In terms of SAMSUNG column batteries, the production of lithium cobalt oxide batteries has been completely stopped and turned to the manufacture of ternary batteries. At present, most of the small high-rate power batteries at home and abroad use ternary cathode materials. glida.en.alibaba.com; www.szglida.com;

A device that stores electrical energy as chemical energy and supplies it as electrical energy when needed is called a battery. The task of the battery is to provide current to the starter motor to start working, send the current to the receiver for use when the vehicle engine is not running, and balance the voltage and amperage in the electrical system to prevent damage to the receiver when the engine is running. Because the voltage generated by the alternator is sometimes too high at high speeds. In this case, the battery will absorb part of the current generated by the alternator and prevent the overvoltage from rising. The 12 V battery used in the gasoline engine consists of six 2-volt batteries connected in series. In each element group, there are positively charged and negatively charged plates in parallel with each other. The positive plaque contains lead dioxide as the active ingredient. Negative plaques contain pure lead as the active ingredient. Between the plates, in order to prevent short circuits, an isolating plate/isolating plate is placed to isolate the plates. The partitions are made of a material with very small holes, so they will not interfere with the chemical reaction between the plates. The electrolyte is a mixture of sulfuric acid and pure water and is placed in the battery. These components are connected in series with the lead bridge.

Batteries are classified into lead acid, nickel cadmium, nickel ortho iron, etc. according to the type of metal used. At present, the most widely used battery type is lead-acid battery, these batteries are basically divided into two types, dry and wet. The most commonly used type of flooded battery is the classic car battery, which we also call the starter or SLI (starting, lighting and ignition functions, indicated by the English initials). Car batteries are also divided into fully enclosed or openable plugs. The internal structure of the two batteries is the same. So both are traditional lead-acid batteries. The difference with enclosed batteries is that the plug cannot be opened. Since these batteries cannot be filled with water, they are more suitable for installation on vehicles with well-arranged voltages. In addition, although their internal structures and areas of use are different, stationary (fixed plant) and tractor (forklift) batteries are also included in the scope of water-based products. Dry-type valve-regulated lead-acid batteries have different internal structures and technologies. VRLA is defined in Turkish as a valve-regulated lead-acid battery. These batteries are also divided into two types according to their internal structure. AGM (electrolyte immersed in the diaphragm) and gel VRLA batteries. The main feature of these batteries is that they will not overflow or leak acid. The gas output is the smallest. Therefore, it is very safe and has a longer shelf life. Compared with wet batteries, it is also more resistant to vibration. Worry-free transportation. Its uses include fixed installations, UPS, ships, and power plants.

What is energy density? What is the energy density of the monomer? ▌What is energy density? Energy density (Energydensity) refers to the amount of energy stored in a unit of a certain space or mass matter. The energy density of a battery is the electric energy released by the average unit volume or mass of the battery. The energy density of a battery is generally divided into two dimensions: weight energy density and volume energy density. Battery weight energy density = battery capacity × discharge platform/weight, the basic unit is Wh/kg (watt hour/kg) Battery volume energy density = battery capacity × discharge platform/volume, the basic unit is Wh/L (watt hour/liter) The greater the energy density of the battery, the more electricity stored per unit volume or weight. ▌What is the energy density of the monomer? The energy density of a battery often points to two different concepts, one is the energy density of a single cell, and the other is the energy density of the battery system. The battery cell is the smallest unit of a battery system. M batteries make up a module, and N modules make up a battery pack. This is the basic structure of a vehicle power lithium battery. The energy density of a single cell, as the name implies, is the energy density of a single cell level. According to "Made in China 2025", the development plan for power lithium batteries is defined: in 2020, the battery energy density will reach 300Wh/kg; in 2025, the battery energy density will reach 400Wh/kg; in 2030, the battery energy density will reach 500Wh/kg. This refers to the energy density of a single cell level.

The future of electric vehicle battery orientation will be the world of hydrogen fuel-powered lithium batteries Not long ago, Zhangjiakou City recently delivered 25 12-meter hydrogen fuel-powered lithium battery buses with a hydrogen refueling time of 10 to 15 minutes and a cruising range of 500 kilometers. In terms of hydrogen energy utilization, Japan is at the forefront of the world. Toyota has mass-produced Mirai Future Combination`s first hydrogen-powered lithium battery car, and Honda has also launched Clarity, which has a 3-minute hydrogenation battery life of 750 kilometers. Therefore, from the perspective of experiencing and coping with range anxiety, hydrogen fuel-powered lithium batteries have absolute advantages. The product of hydrogen fuel-powered lithium batteries is water, which is almost pollution-free. Then why is the lithium battery powered by hydrogen not widely used? Lithium batteries powered by hydrogen fuel are expensive and cannot be commercialized at present. In terms of core technology, so far, there are only two companies in the core components of fuel-powered lithium batteries, namely DuPont in the United States and a company in Japan. In addition, platinum catalysts used in fuel-powered lithium batteries are low in yield and expensive, almost twice that of gold. The complex power system of fuel-powered lithium batteries leads to high processing costs. Take Toyota Mirai's future portfolio as an example. The price is as high as US$69,000, which is much higher than the price of models of the same level.In addition, the cost of building a hydrogen refueling station is also very high. Data shows that building a hydrogen refueling station with a hydrogen refueling capacity of more than 200 kg will cost more than 10 million yuan, which is one of the reasons why hydrogen fuel-powered lithium batteries cannot be commercialized on a large scale. Finally, there are security issues. Lithium batteries powered by hydrogen fuel require a complete hydrogen energy processing and transportation network as support. The safety of hydrogen raw materials and the safe operation of hydrogen fuel filling are issues that need to be addressed. This is also the reason why hydrogen fuel-powered lithium batteries are still not optimistic under the strong support of national policies. Of course, with the advancement of technology, the shackles tied to hydrogen fuel-powered lithium batteries will eventually be lifted, and the capital market is more optimistic about hydrogen fuel-powered lithium batteries, so it will not be too late. As for whether the future will be an electric vehicle or a hydrogen fuel vehicle, it is actually difficult to tell who has the more mature technology, who is more suitable for future policies and market needs, and whose advantage should be higher.

Common 18650 batteries are divided into lithium-ion batteries and lithium iron phosphate batteries. The voltage of the lithium ion battery is 3.6V and 4.2V, the voltage of the lithium iron phosphate battery is 3.2V, the capacity is usually 1200mAh-3000mAh, and the normal capacity is 2200mAh-3600mAh. Due to the fixed size of the 18650 lithium-ion battery pack, its maximum capacity has always been concerned by many practitioners. In recent years, various manufacturers have improved their technology and their production capacity has also increased accordingly. Samsung, Panasonic, LG, Sony and Toshiba can reach more than 3600 mAh, but the capacity range of 2600 ~ 3000 mAh is the most stable and consistent. If it is a lithium-ion battery pack, it is best not to use the highest capacity, not to mention the cost performance, and regardless of the service life of the battery pack, it is not very cost-effective, so it does not mean that the higher the battery capacity, the more stable and lasting. Most application areas have different current and time requirements, so most power batteries appear in the form of lithium-ion battery packs. When choosing a battery pack, the consistency, stability and safety of the battery should be considered. These indicators are very important. It is worth noting that many buyers have a misunderstanding that the actual discharge current will be large if the capacity is high, but this is the opposite: 18650 lithium-ion battery packs are generally divided into capacity type and rate type, and capacity type is the key to reflecting large capacity , But the discharge current is generally lower than 1C, and the current is small; the rate type can discharge at a large current, but the capacity is low and the use time is short. The high-capacity 18650 lithium-ion battery packs currently on the market are 2950 mAh, and batteries with this capacity are also known as 3000 mAh. At present, the batteries in the capacity range of 2200mAh-2600mAh are relatively stable, and the technologies in all aspects are relatively mature. Finally, under the same system, the high capacity of 18650 lithium-ion batteries will bring negative use of high prices, so the balance between capacity and price is very important. The price of 18650 lithium-ion batteries is directly proportional to the capacity. The greater the capacity, the greater the energy efficiency ratio, and the more raw materials used, so the price will be more expensive. The general price is 10-30 yuan per battery. The capacity of the 18650 lithium-ion battery pack is an important selling point for manufacturers. In addition, the brand of the same capacity 18650 lithium ion battery is also a factor affecting the price. Generally speaking, the price of imported brands is higher than that of domestic brands of the same type. As mentioned earlier, the key factor in determining the capacity of the 18650 lithium-ion battery is the structure of the raw material. Therefore, from a positive perspective, the prices of lithium cobalt oxide, lithium manganate, ternary materials and lithium iron phosphate will be different. Due to the dominant price of capacity, the capacity of 18650 lithium-ion batteries on the market will be falsely labeled. For example, marking an 18650-cell lithium-ion battery with a capacity of 2200 mAh as 2600 mAh is an act of deceiving consumers. Unqualified capacity is often caused by man-made nutrition, and users are looking for genuine manufacturers' brands. Whether the capacity of the 18650 lithium-ion battery meets the standard will not only affect the user experience, but will also test Canadian manufacturers in the long run. When consumers buy batteries, there is no need to entangle with foreign original batteries, because domestic packaging plants will also use imported lithium-ion battery packs, and their 18650 lithium-ion battery capacity is no different. The important thing is that the capacity of these 18650 lithium-ion batteries is real.

1.Electromagnetic induction The charging base and the mobile phone terminal have built-in coils respectively. When the two are close, the transmitting coil generates a certain current in the mobile phone receiving coil through electromagnetic induction based on a certain frequency of alternating current, thereby transferring the point energy from the transmitting end to the receiving end, and then starting from The charging base supplies power to the mobile phone. Because the principle is simple and easy to make, coupled with the promotion of Texas Instruments, Philips, Toshiba, Microsoft, Panasonic, Samsung, Sony, Qualcomm and other manufacturers, this is the most popular method on the market. However, wireless charging based on electromagnetic induction also has shortcomings, of which severely limited transmission distance is the most troublesome. 2.Magnetic resonance The magnetic oscillator is composed of a large inductance coil connected in parallel or in series with a small capacitor, and the same resonance frequency is a necessary condition for energy transfer. For example, two coils are used as resonators. The transmitting end vibrates at a frequency of 10MHz to radiate electromagnetic fields around, while the receiving end needs to vibrate at a frequency of 10MHz to receive the transferred energy. Compared with electromagnetic induction, based on magnetic resonance, wireless charging achieves long transmission distance, efficient power supply, and is a one-to-many power supply mode. However, because both parties need to be at the same resonant frequency at the same time, circuit frequency modulation is very important, but this is not so easy. 3.Radio wave The principle is to convert environmental electromagnetic waves into electric current and transmit electric current through the circuit. This wireless charging method has a transmission distance of more than 10 meters, which is suitable for long-distance low-power charging, and can also be automatically charged anytime and anywhere. However, because of the lower conversion efficiency, if you use this method, the charging time will be longer. ---Above knowledge from the Baidu

1. Why do you want to customize lithium batteries? 1. Customized lithium batteries can choose different cores according to their own needs. Different batteries, battery performance, service life, safety and other characteristics are very different. 2. The voltage range that the customized lithium battery equipment can withstand, the customized lithium battery can arrange the voltage according to your own needs, and the voltage of the customized lithium battery can be flexibly used, so ensure that the customized lithium battery device can withstand the corresponding voltage value. 1. Why do you want to customize lithium batteries? 1. Customized lithium batteries can choose different cores according to their own needs. Different batteries, battery performance, service life, safety and other characteristics are very different. 2. The voltage range that the customized lithium battery equipment can withstand, the customized lithium battery can arrange the voltage according to your own needs, and the voltage of the customized lithium battery can be flexibly used, so ensure that the customized lithium battery device can withstand the corresponding voltage value. 3. Customized lithium battery can change the performance, volume, function and other characteristics of the lithium battery on the basis of the original battery to meet the different needs of customers for the battery. 2. Long lifespan: The cycle life can reach more than 500 times in normal use. 1. Large capacity density: Its capacity density is 1.5~2.5 times that of nickel-hydrogen battery or nickel-cadmium battery, or higher. 2. The working voltage of the single battery is as high as 3.6v~3.8v, which is much higher than the 1.2V voltage of nickel-metal hydride and nickel-cadmium batteries. 3. No memory effect: It is not necessary to empty the remaining power before charging, which is convenient to use. 4. Good discharge characteristics: Polymer batteries use gel electrolyte. Compared with liquid electrolyte, gel electrolyte has stable discharge characteristics and a higher discharge platform. 5. Good safety performance: The polymer lithium battery pack is structured with aluminum-plastic soft packaging, which is different from the metal shell of the liquid battery. Once a safety hazard occurs, the liquid battery is easy to explode, while the polymer battery will only blow up. . 6. The thickness is small and can be made thinner: ordinary liquid lithium batteries use the method of customizing the shell first, and then plugging the positive and negative materials. The thickness is below 3.6mm, and there is a technical bottleneck. Polymer batteries do not have this problem. It can be less than 1mm. 7. The shape can be customized: The polymer lithium battery pack can increase or decrease the thickness of the battery cell according to the needs of customers, and develop new battery cell models. The price is cheap and the mold opening cycle is short. Make full use of the battery shell space to increase battery capacity.