Battery heating method, device and equipment based on permanent magnet synchronous motor and medium

Abstract

The invention discloses a battery heating method, device and equipment based on a permanent magnet synchronous motor and a medium, and relates to the field of permanent magnet synchronous motor control of new energy automobiles. If yes, direct-axis current is injected into the whole vehicle based on the mapping relation between the preset heating power and the direct-axis current, so that battery heating is achieved; and if the rotating speed of the motor is not smaller than a preset first motor rotating speed threshold value and not larger than a preset second motor rotating speed threshold value, and the whole vehicle gear signal is not a parking signal, direct-axis current is injected into the whole vehicle based on the target whole vehicle information and a preset target mapping relation, so that battery heating is achieved, the target mapping relation is the mapping relation among the heating power, the motor rotating speed, the torque and the direct-axis current. The problems that in the prior art, noise exists in the pulse self-heating process of the power battery, and heating is conducted by depending on an external charging pile, and convenience is poor are solved.

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