The invention provides a self-adjusting battery heating method and system and an electric vehicle, and relates to the field of new energy vehicle control, and the self-adjusting battery heating method comprises the following steps: receiving a battery heating instruction to collect a D-axis feedback current and generate a Q-axis current for limiting torque output; obtaining a Q-axis voltage through current loop control based on the Q-axis current; bus voltage is collected, and the amplitude of D-axis voltage is calculated according to the bus voltage and the Q-axis voltage; and comparing the D-axis feedback current with a preset threshold range, and autonomously controlling the direction of the D-axis voltage, so that after the D-axis voltage is injected according to the amplitude of the D-axis voltage and the direction of the D-axis voltage, a D-axis current with a high-frequency alternating triangular wave is formed, and a high-frequency alternating current is formed on the battery through input to heat the battery. The problems that according to an existing heating method, the D-axis voltage is fixed and lacks self-adjustability, and potential safety hazards exist are solved.
本发明提供了一种自调节的电池加热方法、系统以及电动汽车,涉及新能源车辆控制领域,包括以下:接收电池加热指令,以采集D轴反馈电流并生成限制扭矩输出的Q轴电流;基于所述Q轴电流由电流环控制获得Q轴电压;采集母线电压,根据所述母线电压和所述Q轴电压计算D轴电压的幅值;将所述D轴反馈电流与预设阈值范围比较,自主控制D轴电压的方向,使得根据所述D轴电压的幅值和所述D轴电压的方向注入D轴电压后,形成具有高频交变三角波的D轴电流,以输入在电池上形成高频交变电流,进行电池加热,解决现有加热方法D轴电压固定缺少自调节性,存在安全隐患的问题。
Self-adjusting battery heating method and system and electric vehicle
一种自调节的电池加热方法、系统以及电动汽车
30.12.2022
Patent
Elektronische Ressource
Chinesisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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 |
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