The invention discloses a method for heating a power battery by using an electric driving system and an electric vehicle. The method comprises the following steps that the actual temperature of the power battery is collected; the actual temperature is compared with a preset heating temperature threshold; if the actual temperature is lower than or equal to the preset heating temperature threshold,a corresponding preset current limit value is obtained according to the actual temperature; the on-off state of an inversion module in the electric drivingsystem is adjusted, so that energy flows between the power battery and a motor in the electric driving system in a bidirectional mode; the actual current of the power battery is calculated; and the duty ratio of the inversion module is adjusteduntil the actual current meets the preset current limit value. The existing motor and the existing motor controller of the electric vehicleare utilized, extra cost does not need to be increased, meanwhile, the heating mode is heating from the interior of the battery, heat conduction loss is small, and heating efficiency is high.
本发明公开了利用电驱动系统对动力电池加热的方法及电动汽车,方法包括以下步骤:采集动力电池的实际温度;将实际温度与预设加热温度阈值进行比较;若实际温度低于或等于预设加热温度阈值,则根据实际温度获取对应的预设电流限值;调节电驱动系统中逆变模块的开关状态,使得能量在动力电池与电驱动系统中的电机之间双向流动;计算动力电池的实际电流;调节逆变模块的占空比,直到实际电流满足预设电流限值。本发明利用电动汽车既有的电机和电机控制器,无需增加额外的成本,同时加热方式为从电池内部加热,热传导损耗小且加热效率高。
Method for heating power battery by using electric driving system and electric vehicle
利用电驱动系统对动力电池加热的方法及电动汽车
2020-08-25
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
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