Battery heating circuit, control method, controller, power system and electric equipment

The invention discloses a battery heating circuit, a control method, a controller, a power system and electric equipment. The battery heating circuit comprises a resonance circuit, an inverter and an alternating current driving motor, wherein the resonance circuit is used for being electrically connected with a battery, the inverter is electrically connected with the resonance circuit, and the alternating current driving motor is electrically connected with the inverter; and the inverter is used for controlling a direct-axis current of the alternating-current driving motor to change along a preset PWM wave so as to generate a resonance current for heating the battery between the resonance circuit and the battery.