Patent ID: 8836277

Claim:
A circuit for heating a battery, the circuit comprising: the battery including a damping component and a first current storage component, the damping component and the first current storage component being parasitic to the battery; a first switch unit; a charge storage component, the charge storage component and the first switch unit being at least parts of a battery discharging circuit; a second current storage component connected in series with the charge storage component; a one-way semiconductor component connected in series with the second current storage component, the one-way semiconductor component and the second current storage component being connected in parallel with the first switch unit, the charge storage component, the second current storage component, and the one-way semiconductor component being parts of a battery charging circuit; and a second switch unit connected in parallel to the charge storage component and the second current storage component, the second switch unit and the second current storage component being parts of a voltage regulation and polarity inversion circuit for the charge storage component; wherein the circuit for heating the battery is configured to heat the battery by at least discharging the battery and charging the battery.