CPC H01M 10/615 (2015.04) [B60L 58/27 (2019.02); H01M 10/48 (2013.01); H01M 10/486 (2013.01); H01M 10/613 (2015.04); H01M 10/625 (2015.04); H01M 10/635 (2015.04); H01M 10/6567 (2015.04); H01M 10/663 (2015.04); H02J 7/0047 (2013.01); H02J 7/007194 (2020.01); H01M 2220/20 (2013.01)] | 20 Claims |
1. A power battery heating method, configured for heating a power battery of a vehicle, the power battery heating method comprising:
obtaining a current temperature value of the power battery, and determining that the current temperature value of the power battery is lower than a preset temperature value;
obtaining heating power of the power battery;
obtaining a preset quadrature-axis current, and obtaining a corresponding preset direct-axis current according to the heating power of the power battery, wherein a value of the obtained preset quadrature-axis current is a quadrature-axis current value that causes a torque value outputted by a three-phase alternating current motor to fall within a target range, and zero is not comprised in the target range; and
controlling an on/off status of a power device in a three-phase inverter, so that the three-phase alternating current motor generates heat according to heating energy provided by a heating energy source, to heat a coolant flowing through the power battery, and controlling, according to the preset direct-axis current and the preset quadrature-axis current, the three-phase inverter to adjust a phase current of the three-phase alternating current motor in the heating process, wherein a direction of the preset direct-axis current changes periodically in the heating process.
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