Lithium batteries generally have a PCM protection function, with three functions of overcharge protection/overdischarge protection/overcurrent protection. If the chip resistance of the battery protection board is damaged, it will lose its protective effect on the battery. The battery protection board chip resistance , There are three main uses, 1. Overvoltage detection; 2. Overcurrent detection; 3. Overtemperature detection. That is, it can transmit detection signals to the battery. Once damaged, the signal cannot be transmitted and the protection circuit is in a fault state. If the protection circuit fails, the normal operation of the battery cannot be effectively protected.
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