Charge-discharge protection circuit and lithium battery protection system

The invention discloses a charging and discharging protection circuit and a lithium battery protection system, and the circuit comprises a battery protection circuit, a battery, a charger or a load, and an RC filter circuit. The RC filter circuit comprises a first resistor and a first capacitor, one end of the first resistor is connected with one end of the first capacitor and then connected witha VDD end of the battery protection circuit, and the other end is connected with a battery positive electrode; the battery protection circuit comprises a charging voltage protection circuit or a discharging voltage protection circuit, and further comprises a basic protection circuit, an AND gate, a driving circuit and a first MOS transistor, and the charging voltage protection circuit or the discharging voltage protection circuit and the basic protection circuit are connected with the input end of the AND gate. Through the cooperation of a second time delay circuit and a counter, the output ofa latch circuit controls