Lithium battery BMS charging wake-up and charging signal detection circuit

The invention relates to a lithium battery BMS charging wake-up and charging signal detection circuit. The circuit comprises a voltage division circuit, an optocoupler isolation circuit, a detection wake-up circuit and a grounding isolation circuit. The voltage division circuit is respectively connected with the optical coupler isolation circuit and the grounding isolation circuit, and the optical coupler isolation circuit is also connected with the detection wake-up circuit; wherein the voltage division circuit is used for dividing an initial voltage of an external power supply into an input voltage of the optocoupler isolation circuit; the optical coupler isolation circuit is used for isolating an external signal from a vehicle BMS (Battery Management System); the detection wake-up circuit is used for detecting whether charging is currently carried out or not and waking up a vehicle BMS system; the grounding isolation circuit is used for isolating external power source grounding from vehicle BMS system grou