EV battery

How to use lithium batteries in parallel?

by：Vglory 2021-03-26

It sounds simple to use lithium batteries in series and in parallel, but you have to follow some simple rules to guard against unnecessary problems. Do not mix lithium batteries of different brands, different capacities, or new and old lithium batteries. Choose batteries with the same performance. When the battery power is low, replace all the batteries. When using lithium batteries in series, use the same type of battery. Pay attention to the polarity of the battery. If the polarity of one battery is reversed, the voltage of the entire string of batteries will be reduced, rather than increased. If you mix different capacity or new and old lithium batteries together, there may be leakage, zero voltage and other phenomena. This is because during the charging process, the capacity difference causes some batteries to be overcharged during charging, and some batteries are not overcharged. During discharging, some batteries with high capacity are not fully discharged, and batteries with low capacity are overdischarged. In such a vicious circle, the battery is damaged and leaks or low (zero) voltage. Generally, lithium battery cores must be paired when using lithium batteries in series and parallel. The matching standards are: lithium battery core voltage difference ≤10mV, lithium battery core internal resistance difference ≤5m, and lithium battery core capacity difference ≤20mA. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.

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