Lithium Battery 3.7V Lithium Polymer Battery 3.2V LifePo4 Battery 1.2V Ni-MH Battery Button Coin Battery
3.7V Battery Pack 7.4V Battery Pack 11.1V Battery Pack 14.8V Battery Pack Other Battery Pack
Sino Science&Technology Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of Lifepo4 batteries,energy storage battery,portable UPS power supply,personalized customization lithium battery pack etc .
Environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery,3.7V lithium polymer battery, NiMH battery , NiCD battery ,Lead acid battery,dry cell battery ,alkaline battery ,heavy duty battery, button cell battery etc. we devote to R&D,innovation ,production & sales
Shenzhen Green Power Energy Battery Co.,ltd specializes in a wide range of digital battery such as environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery, 3.7V lithium polymer battery, NiMH battery, NiCD battery, dry cell battery, alkaline battery, heavy duty battery, button cell battery etc. we devote to R&D, innovation, production & sales. With automatic production machines we have been exported goods to all over the world over 15years. We have complete exported certificate such as KC, CE, UL, BSCI, ROHS, BIS, SGS, PSE etc
Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
Anhui Seong-hee New Energy Technology Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of primary batteries. And mainly produces and sells alkaline batteries & carbon zinc batteries. there are size AA, AAA, C, D, 9V etc
Guizhou STD Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production & sale of lithium polymer batteries, drone battery, airplane batteries & battery pack etc.
source:Industry News release time:2023-09-18 Hits: Popular:AG11 battery
Everyone knows that electric vehicles and large energy storage devices nowadays are composed of many 18650 batteries, so how can we ensure that each battery in our battery pack can match consistently? Currently, in the industry, batteries are screened through a series of parameters such as capacity, voltage, and internal resistance. This screening process is complex and has limitations, such as measurement errors. The current measurement error in China is around 1%, which cannot meet the market demand for power batteries. So the Energy Research Institute of Tsinghua University proposed a new screening method: to screen batteries through series charging and discharging curves. Because in fact, the charge discharge curve itself reflects all the parameters of the battery. If the parameters are different, there must be differences in the charge discharge curve. On the contrary, if all the parameters of the battery are theoretically the same, then the charge discharge curve should be exactly the same.
A combination power battery is never a single battery, just like a Tesla car battery, which consists of approximately 9600 Panasonic 18650 lithium batteries combined in series and parallel, making battery consistency the most important issue. Due to the differences in the parameters of each battery cell, there will be differences in its working state. If not controlled, it will damage the battery and cause safety issues; But with control, the capacity cannot be fully utilized.
So only by combining multiple 18650 lithium batteries in series and parallel, and conducting consistency screening, can we effectively distinguish the consistency of the batteries. Series charging and discharging refers to the charging and discharging of factory batteries after being connected in series. This type of screening has many advantages, as it only needs to select a voltage for screening, with relatively simple parameters and is simple and fast. In traditional screening, devices with current accuracy less than 1% are very expensive, while the absolute values of series currents are the same. By using the series charging and discharging method for screening, equipment errors can be avoided. The Pinshangtong R&D team selected five typical batteries, including two Korean manufacturers and one Japanese manufacturer. Through comparison, it was found that the weight error is the biggest difference between domestic and foreign batteries, mainly reflected in the liquid injection process, and the amount of electrolyte inevitably affects consistency. Therefore, compare the discharge situation, that is, put it at the lowest voltage to see the voltage of each battery, and then stand still for 30 minutes to see the rebound VC voltage. Because static is generally used to study the impedance characteristics of batteries, the voltage of static rebound is actually a very important factor in battery characteristics. These points are also the largest among all curve voltages. However, when these points are compared together, it can be found that the voltage dispersion at the discharge end is relatively large, If the voltage at the discharge end is used for consistency screening, only one parameter can be used to screen battery consistency. Then compared to other curves, the research team found that the voltage at the discharge end was the most excellent for consistency screening. Using this method to test the above five batteries, it is evident that Japan's battery consistency indicators are the best, while China and South Korea have similar levels of consistency, all lagging behind Japan. Taking Korean batteries as an example, after screening the series connection of batteries, it was found that the performance of their battery pack was almost the same as that of individual cells. This also once again proves the effectiveness and convenience of this series parallel screening method.
Read recommendations:
How does the cylindrical lithium electric explosion valve work in thermal discharge!
Next:Characteristics and applications of lithium-ion batteries.18650 lithium ion battery 3.7v
Popular recommendation
401030 battery Manufacturing
2023-03-2218650 battery 3.7v 2200mah
2023-03-22lithium battery energy storage direct sales
2023-03-223.7v lithium battery Factory
2023-03-2218650 battery pack manufacture
2023-05-09Li-ion 18650 3000mAh 3.7V
2022-06-20Coin Battery LR 726
2022-10-1518650 7200MAH 3.7V
2022-07-29Coin Cell BR 1632
2022-10-15801538 480mAh 3.7V
2022-08-19602030 300MAH 3.7V
2023-06-10LR20
2022-08-193.2V 50Ah
2022-10-12602248 600mAh 3.7V
2022-07-016F22
2023-03-27lithium polymer battery
2023-06-25dry cell battery
2023-06-257/AAA USB 1.5V 600mWh
2022-06-27AG9 battery
2023-06-25AA Ni-MH batteries
2023-06-25Energy of Disposable Lithium Batteries
2025-06-05Advantages and disadvantages of lithium battery
2022-11-16What are the advantages of lithium iron phosphate battery
2022-11-07Composition of marine power battery packs
2024-07-04High-efficiency solar cell growth soars; conversion technology is key
2024-01-24Electronic Protection of Lithium Batteries.polymer lithium battery
2023-08-04Which is a good vanadium or lithium battery?
2022-11-24What is a low temperature lithium battery?
2022-11-23What raw materials are mainly used in the production of lithium batteries
2023-03-07The characteristics of lithium iron phosphate battery.solar energy storage system battery pack lithi
2023-03-22