The circuit diagram is as follows:
Working principle:
When the battery voltage is between 2.5V and 4.3V, the first pin and the third pin of DW1 both output high level (equal to the power supply voltage), and the voltage of the second pin is V. At this time, the voltage at the first pin and the third pin of DW1 will be applied to the 54th pin of 825A, respectively, and the two electronic switches in 825A are in a conducting state because their G poles are connected to the voltage from DW1, that is, both electronic switches are in an on state. At this time, the negative electrode of the battery is in direct communication with the P- terminal of the protection plate, and the protection plate has voltage output. Extended data
Main functions: overcharge protection function, overdischarge protection function, short-circuit protection function, overcurrent protection function, over-temperature protection function and balanced protection function.
definition of interface: the charging port and discharging port of the board are independent of each other, and they 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 via holes, and the diameter of pad holes is 3mm; Each charging detection interface of the battery is output in the form of DC needle holder.
parameter description: configuration of maximum working current and overcurrent protection current value, with units of A(5/8, 8/15, 1/2, 12/25, 15/3, 2/4, 25/35, 3/5, 35/6, 5/. Lithium battery protection plate