Power battery heating control method, electric vehicle and medium

Abstract

The invention discloses a power battery heating control method, an electric vehicle and a medium, and the method comprises the steps: obtaining the charging and discharging power and heating power of a power battery when an external power supply is connected to a power battery heating system; the expected current of the three-phase winding is obtained according to the charging and discharging power and the heating power; and controlling the current in the second phase winding and the third phase winding in the three-phase motor based on the expected current of the second phase winding and the third phase winding in the expected current of the three-phase winding and the sampling current of the second phase winding and the third phase winding. Through an external power supply and multiplexing a circuit structure during boost charging, the effect of controlling the charging and discharging current of the power battery is achieved, the problem that the self-heating effect of the power battery cannot be carried out when the electric quantity of the power battery is exhausted or is low is solved, and the heating efficiency of the power battery is improved.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a power battery heating control method, an electric vehicle and a computer-readable storage medium. Background technique [0002] When the electric vehicle is in a low temperature environment, the discharge efficiency of the power battery will decrease, which will reduce the battery life of the whole vehicle; and high-current charging will cause the power battery to precipitate lithium, causing irreversible damage to the power battery and reducing battery safety. Therefore, in a low temperature environment, the power battery will be heated first. The commonly used method is that the battery charges and discharges the motor windings. In addition to the internal resistance of the battery itself, the motor is used to generate heat, and the heat is transferred to the battery through the thermal management system, so as to improve the heating efficiency of the battery, thereby improving t...

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a power battery heating control method, an electric vehicle and a computer-readable storage medium, aiming at solving the common battery heating scheme, which not only cannot solve the problem of low battery life of the electric vehicle, but also further reduces the power consumption of the power battery. technical issues of power consumption and safety

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