Directly charge the positive and negative electrodes of the lithium battery When the voltage of the lithium battery reaches the minimum limit voltage of the protection board, the protection board will work. Just charge it and it's activated. The battery itself has a circuit to protect the battery. When the battery is fully charged, the charger continues to operate, which can lead to overcharging. At that time, the battery will be locked for protection reasons. Can be unlocked by draining excess electricity.
There are three possibilities for the battery to be locked: battery charging protection circuit failure, overcharging, exceeding the battery chip design protection voltage , the battery chip will directly disconnect the battery core and refuse. to go out. Battery temperature is too high. LWhen the temperature sensor inside the battery detects that the battery temperature is too high, the fuse-to-fuse program starts to disconnect the battery output.
Excessive battery discharge, the battery itself undergoes a self-discharge process, which usually takes about 3 months. Once the battery cell voltage falls below the protection voltage set by the chip, the battery cell stops working.