Apsaugos plokštės apsaugos nuo perkrovos kontrolės principas

When the cell is discharged through an external load, the voltage of the cell will gradually decrease, and the DW01 will monitor the voltage of the cell in real time through the R1 resistor. In the state of over-discharge voltage, the output voltage of pin 1 is immediately disconnected, so that the voltage of pin 1 becomes 0V, and the switch tube in 8205A is turned off because there is no voltage on pin 5. At this time, the B- of the battery cell and the P- of the protection board are in a disconnected state. That is, the discharge circuit of the cell is cut off, and the cell will stop discharging. The protection board is in an overdischarged state and remains there. After the P and P- of the protection board are indirectly charged with the charging voltage, DW01 stops the over-discharge state immediately after B- detects the charging voltage, and outputs a high voltage on the 1st pin again, so that the over-discharge control tube in the 8205A is turned on. That is, the B- of the battery and the P- of the protection board are reconnected, and the battery is directly charged by the charger.