The invention discloses a battery thermal management system for a pure electric vehicle in a high-temperature environment and a control method thereof, and the method comprises the steps: comparing the driving characteristic parameters of a front vehicle with the real-time driving characteristic parameters of the vehicle, obtaining an instantaneous speed weight and an average speed weight which change along with the driving of the vehicle, and determining the future driving condition of the vehicle; determining the influence of the future driving condition of the vehicle on the charging and discharging current in the battery reaction process, further determining the battery temperature corresponding to the future driving condition of the vehicle, comparing the battery temperature with a threshold value, and judging whether the battery enters a radiator cooling mode or a cooling-water machine cooling mode; and solving the optimal output rotating speed of the water pump and the fan in the cooling mode by taking the minimum difference value between the temperature of the lithium ion battery and the target temperature and the optimal energy consumption of an actuator of the thermal management system as optimization targets. The energy consumption of the actuator and switching among different modes are considered, the control precision is high, and the energy consumption is reduced.
本发明公开了一种纯电动汽车中高温环境下的电池热管理系统及其控制方法,将前车驾驶特征参数与本车实时驾驶特征参数进行比较,得到随本车驾驶变化的瞬时速度权重和平均速度权重,进而确定本车未来驾驶工况;确定本车未来驾驶工况对电池反应过程中的充放电电流的影响,进而确定本车未来驾驶工况对应的电池温度,并将电池温度与阈值进行比较,判断电池进入散热器冷却模式或者冷水机冷却模式;以锂离子电池温度与目标温度的差值最小及热管理系统执行器能耗最优作为优化目标,求解出冷却模式中水泵和风扇的最佳输出转速。本发明考虑了执行器能耗以及不同模式间的切换,控制精度较高且降低了能耗。
Battery thermal management system in high-temperature environment of pure electric vehicle and control method of battery thermal management system
一种纯电动汽车中高温环境下的电池热管理系统及其控制方法
2023-08-01
Patent
Electronic Resource
Chinese
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