Lithium battery protection board function description

1. Connect the lithium battery and the protection board to the protection circuit according to the wiring diagram to test the voltage and current of each battery in the series battery pack, and control the charging and discharging process of the battery pack. The voltage of each battery in the battery pack is between the overcharge test voltage and the overdischarge test voltage, and when there is no short circuit in the output, the MOS tube is turned on, and P+ and P- can be used to discharge the battery pack; 2. Battery Package over-discharge protection function When the voltage of any battery in the series battery pack drops to the over-discharge test voltage and the over-discharge delay time is reached, the over-discharge protection function starts, cuts off the discharge MOS tube, and prohibits the battery pack from outputting current to protect The battery pack is safe, the circuit board enters the dormant state, and the current consumption of the circuit board is below the dormant current. The circuit that enters the dormant state can only recover after the charger is connected and the battery voltage exceeds the over-discharge recovery voltage; 3. Battery pack overcharge protection Function During the process of charging the battery pack through P+ and C-, when the voltage of any battery rises to the battery overcharge test voltage and exceeds the overcharge delay time, the overcharge protection function is activated, the charging MOS tube is cut off, and the battery is prohibited The battery pack is charged to protect the safety of the battery pack. When the battery pack is connected to the load and discharged or the battery voltage drops below the overcharge recovery voltage, the overcharge state is restored; 4. Battery pack short-circuit protection function When the battery pack discharge port P+ and P- are short-circuited When the short circuit protection delay time, the protection circuit will cut off the discharge MOS tube and prohibit the battery pack from discharging to the outside. When the external short circuit is removed, the circuit will automatically recover; 5. The battery pack overcurrent protection function works when the battery pack discharge port P+ When an overcurrent phenomenon occurs with P-, the protection circuit will cut off the discharge MOS tube after the overcurrent protection delay time, and prohibit the battery pack from discharging externally. When the external short circuit is removed, the circuit will automatically recover. 6. Battery pack charge equalization function. When the battery voltage of each battery in the battery pack is different due to the matching of the battery or the influence of the external environment, if the battery voltage difference between the series connected groups exceeds the set value, the equalization circuit is allowed to work, and the equalization is in Starting during the charging process, the equalizing resistor discharges the battery pack with the highest relative capacity, and the equalizing current is the equalizing absorption current value to reduce the voltage rise of the battery pack. When the voltage difference between the series of batteries is less than the set value, the equalizing circuit is prohibited Work without any balanced electricity. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Analysis of the advantages and disadvantages of different types of batteries