As we all know, the lithium battery we use is actually composed of several small lithium batteries connected in parallel. There are several plastic-like plates between the gaps of the internal lithium battery to separate them. These small plastic-like boards are actually lithium battery protection boards. In fact, the lithium battery protection board is not made of plastic. It consists of several non-conductive fiberboards with a layer of oil on the outside. We all know that the oil is not conductive, which is why the lithium battery protection board can isolate several lithium batteries and avoid short circuits.
Secondly, we talked about the lithium battery protection board and the function of protecting the battery to avoid overcharging the battery. When the external power supply continuously charges the battery, the lithium battery protection board will protect. When the internal capacity of the lithium battery reaches saturation, the internal circuit of the lithium battery protection board will automatically cut off the external fast charging power. This makes it impossible for the external power supply to enter the battery. This is also the principle that the lithium battery protection board protects the battery from overcharging.
We talked about the lithium battery protection board to protect the lithium battery and avoid the function of the lithium battery over discharge. When the lithium battery is over-discharged, the internal memory of the lithium battery will undergo a qualitative change. At this time, the lithium battery protection board can sense this, thereby quickly cutting off the discharge power supply, so that the lithium battery does not discharge all the electricity. Thereby ensuring the stability of the internal current of the lithium battery and avoiding the situation that the lithium battery is over-discharged.