Battery heating circuit

The present invention provides a battery heating circuit, wherein, the battery comprises a first battery and a second battery; the heating circuit comprises a first switch unit, a second switch unit, a damping element R1, a damping element R2, a current storage element L3, a current storage element L4, a switching control module and an energy storage element V1; the first battery, damping element R1, current storage element L3, energy storage element V1 and first switch unit are connected in series to constitute a first charging/discharging circuit; the second battery, damping element R2, current storage element L4, energy storage element V1 and second switch unit are connected in series to constitute a second charging/discharging circuit; when the energy storage element V1 is charged or discharges, the direction of charging/discharging current in the second charging/discharging circuit is reverse to the direction of charging/discharging current in the first charging/discharging circuit; the switching control module is electrically connected with the first switch unit and second switch unit, and is configured to control the first switch unit and second switch unit to switch on in alternate, so as to control the electric energy to flow among the first battery, energy storage element V1 and second battery. The battery heating circuit of the present invention can achieve high heating efficiency.