Working principle:
When the battery voltage is between 2.5V and 4.3V, the 1 pin and the third pin of DW0 1 both output high level (equal to the power supply voltage), and the voltage of the second pin is 0V. At this time, the voltage at the 1 pin and the voltage at the DW0 1 third pin will be applied to the 54th pin of the 8205A, respectively, and the two electronic switches in the 8205A are in the on state because their G poles are connected to the voltage from DW0 1, that is, both electronic switches are in the on state. At this time, the negative electrode of the battery is directly connected with the P terminal of the protection plate, and the protection plate has voltage output.
Main functions of extended data: overcharge protection function, overdischarge protection function, short-circuit protection function, overcurrent protection function, over-temperature protection function and balanced protection function.
Interface definition: the charging port and discharging port of the board are independent of each other and are positive electrodes, B- is the negative electrode connected to the battery, and C- is the negative electrode of the charging port; P- is the cathode of the discharge port; B-, P- and C- pads are all through holes, and each charging detection interface of the battery with a pad hole diameter of 3mm is output in the form of a DC pin holder.
Parameter description: maximum working current and overcurrent protection current value configuration, unit: a (5/8,8/15, 10/20, 12/25,15/30,20/40,25.
Baidu encyclopedia? Lithium battery protection plate