The embodiment of the invention provides an electric vehicle power battery heating method and device. The method comprises the steps that the current battery temperature of a power battery is obtained; judging whether the power battery needs to be actively heated or not according to the current battery temperature; if yes, the D-axis current of the motor and the PWM switching frequency of each phase of the motor are adjusted, so that heat generated by a motor winding and a power module heats the battery cooling liquid; and finally, the power battery is actively heated through the heated battery cooling liquid, so that the active heating function of the battery can be realized under the condition of not increasing extra hardware cost, and the service life of the battery is ensured.
本申请实施例提供一种电动汽车动力电池加热方法及装置,该方法包括:先获取动力电池的当前电池温度;根据当前电池温度判断是否需要对动力电池进行电池主动加热;如果是,调整电机的D轴电流和电机各相的PWM开关频率,以使电机绕组及功率模块产生的热量对电池冷却液进行加热;最后通过被加热的电池冷却液对动力电池进行主动加热,能够在不增加额外硬件成本的条件下实现电池主动加热功能,保证电池的使用寿命。
Electric vehicle power battery heating method and device
一种电动汽车动力电池加热方法及装置
2022-09-30
Patent
Electronic Resource
Chinese
IPC: | H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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