The invention relates to the technical field of battery protection, and discloses a protection circuit and method applied to a battery positive
electrode and
electronic equipment, the circuit comprises a main
control circuit, a charging and discharging
control circuit and a protection
logic control circuit, and the protection
logic control circuit controls the charging and discharging of a battery according to a
battery voltage value and an output
voltage value of an output end. The
control circuit is used for controlling the plurality of protection control circuits to be respectively in an on / off state, outputting a detection
voltage value to the main control circuit, determining the current state of the battery through the main control circuit according to the detection
voltage value, and outputting a
control signal corresponding to the current state to the charging and discharging control circuit; the charging and discharging control circuit is controlled to be switched on or switched off according to the
control signal; and when the charging and discharging control circuit is switched on, the battery is controlled to be discharged / charged. Therefore, whether the current state of the battery needs to be protected or not can be judged based on the
battery voltage and the output port voltage, battery charging / discharging is controlled at the positive
electrode of the battery, and therefore the reliability of battery protection is improved.