Method for pulse heating of power battery of electric automobile and electric automobile

You are here: Homepage > Search

Method for pulse heating of power battery of electric automobile and electric automobile

Free access

XU YANKUN / CAO SEN / ZHANG XUELIANG

The invention provides a method for pulse heating of a power battery of an electric automobile and the electric automobile, the electric automobile comprises a plurality of motors and a plurality of three-phase bridge arms, the bridge arm midpoint of each three-phase bridge arm is used for being connected with a three-phase winding of one motor, and each three-phase bridge arm is used for being connected with the power battery through a direct current bus. The control method comprises the following steps: controlling each three-phase bridge arm to generate pulse current on a direct-current bus; and adjusting the switching frequency of a switching tube of at least one of the plurality of three-phase bridge arms so as to reduce the phase difference of the pulse current generated by the plurality of inverter circuits. By adjusting the phase value of the pulse current output by the at least one three-phase bridge arm, the phase difference of the pulse current generated by the plurality of three-phase bridge arms is reduced, so that the heating efficiency of the power battery is improved.

本申请提供一种用于脉冲加热电动汽车的动力电池的方法及电动汽车，电动汽车包括多个电机、多个三相桥臂，每个三相桥臂的桥臂中点用于连接一个电机的三相绕组，每个三相桥臂用于通过直流母线连接动力电池，控制方法包括：控制每个三相桥臂用于在直流母线上产生脉冲电流；调整多个三相桥臂中至少一个三相桥臂的开关管的开关频率以降低多个逆变电路产生的脉冲电流的相位差。通过调整至少一个三相桥臂输出的脉冲电流的相位值，从而降低多个三相桥臂产生的脉冲电流的相位差，以提高动力电池的加热效率。