How to deal with the problem of unbalanced lithium-ion battery power?
March 30, 2021
How to deal with the problem of unbalanced lithium-ion battery power?
Remove the protection board part of the lithium-ion battery, because repairing the unbalanced lithium-ion battery first needs to check the status of the lithium-ion battery, find the cells that affect the normal working of the whole group of batteries, this must bypass the battery protection board and directly measure the single cell Lithium batteries and record them;
2. Separately recharge the battery that has failed, or test the capacity separately, check whether the capacity and internal resistance of the battery are significantly different from the whole group of batteries. If the difference is not significant, you can recharge it separately, if the capacity already exists The difference between the internal resistance and the internal resistance means that it can only be replaced;
3. The battery pack that is repaired after recharging or replacing the monomer shall be subjected to a sub-capacity treatment of the battery cell part before reassembly to check whether the capacity meets the design requirements;
4. Restore the battery according to the original circuit, install the battery protection board and outer packaging;
Note: It is important to note that unbalanced lithium-ion batteries usually occur on the lithium-ion battery pack after a period of use, so the internal resistance of the entire battery pack will be different from that of the new battery. Special treatment is required when replacing the monomer. Replacing a brand new monomer may soon cause the problem to recure