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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.
release time:2023-03-28 Hits: Popular:AG11 battery
1. Inconsistent voltage, low individual voltage
1. Low voltage caused by high self -discharge
The core self -discharge is large, so that the voltage is reduced faster than other, and the voltage can be eliminated by storing the voltage.
2. Low voltage caused by uneven charging
When the battery is charged after testing, the core charge of the core is uneven due to inconsistency of the contact resistance or charging current of the detection cabinet. There is a small difference in measuring voltage in the short -term storage (12 hours), but there is a large difference in voltage during long -term storage. This low voltage has no quality problem and can be solved by charging. After charging in production, the storage for more than 24 hours to measure voltage.
Second, lithium battery swell
1. The lithium battery expands when charging
When the lithium battery is charged, the lithium battery will swell naturally, but generally does not exceed 0.1 mm, but excessive charging will cause electrolyte decomposition, increase internal pressure, and lithium battery swell.
2. Expansion during processing
Generally speaking, abnormal treatment (such as short circuit, overheating, etc.) can cause internal heating electrolyte decomposition and lithium battery swell.
3. During the cycle
The thickness of the battery increases with the number of cycles, but it will not increase after more than 50 weeks. At 0.3 ≤ 0.6 mm, the normal growth of aluminum shells is more serious, which is caused by normal battery reactions. However, if the thickness of the shell is increased or internal materials are reduced, the expansion phenomenon can be appropriately reduced.
Third, the internal barrier is too large
1. Different test equipment
If the detection accuracy is not enough or the contact group cannot be eliminated, the internal resistance of the display is too large. The internal resistance test should be tested by the principle of AC bridge method. Storage time is too long
Excessive storage of lithium batteries will cause excessive capacity loss, internal passivation and internal resistance changes, and can be resolved through charge and discharge activation.
2. Internal resistance caused by abnormal heat
The abnormal heating of the battery is caused by the processing of iron core (welding, ultrasonic waves, etc.), which causes thermal closure phenomenon and increases the internal resistance.
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