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3、 Insufficient charging of lithium-ion batteries
During the recycling process of lithium-ion batteries for electric vehicles, charging stops before reaching the cut-off voltage of the lithium-ion battery. This situation is due to the inconsistent single string charge or capacity of lithium-ion batteries. Those with high charge or low capacity are charged first, and are protected by a protection board, causing other strings of batteries to stop charging before they are fully charged.
In this situation, a balanced charger can be used to recharge the lithium-ion battery to maintain consistent voltage across each string. If there is a significant difference in capacity, the battery with the larger difference must be replaced. But the most important thing is to conduct capacity testing, pairing, and capacity division on the battery cells before assembly, otherwise it will be troublesome to disassemble them again if a single string becomes outdated.
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