The invention discloses a low-temperature protection method for a battery of a tandem type hybrid power electric vehicle. The low-temperature protection method comprises the following steps that S10, high-voltage read is conducted on the whole vehicle; step S20, judging whether the temperature (battery cell min temperature) of the battery cell is less than or equal to-25 DEG C, if so, performing step S30, and if not, repeating the step S20 for judgment; s30, whether the temperature of the engine coolant is smaller than or equal to-25 DEG C or not is judged, if yes, the step S40 is carried out, and if not, the step S30 is repeated for judgment; and step S40, enabling a battery low-temperature protection strategy, and raising the temperature of the battery cell and the temperature of the engine coolant. When the temperature of the battery cell and the temperature of the engine coolant are lower than the threshold values, the APU is requested to generate electricity with small power to heat the battery heating film, so that the engine quickly reaches a warm-up state, the temperature of the battery quickly reaches a more comfortable interval, the battery is prevented from being overcharged, and meanwhile, the whole system quickly reaches the optimal state of dynamic property and economical efficiency.
本发明公开了一种串联式混合动力电动汽车电池低温保护方法,包括以下步骤:步骤S10,整车上高压ready;步骤S20,判断电池电芯的温度(电芯min温度)是否小于等于‑25℃,若是则进行步骤S30,若否则重复步骤S20进行判断;步骤S30,判断发动机冷却液温度是否小于等于‑25℃,若是则进行步骤S40,若否则重复步骤S30进行判断;步骤S40,使能电池低温保护策略,对电池电芯的温度以及发动机冷却液温度升高。本发明在电池电芯温度和发动机冷却液温度低于阈值时,请求APU小功率发电给电池加热膜加热使用,以使发动机快速达到暖机状态,电池温度快速达到较为舒服区间,即避免电池过充,同时让整个系统快速达到动力性和经济性的最佳状态。
Tandem type hybrid power electric vehicle battery low-temperature protection method
一种串联式混合动力电动汽车电池低温保护方法
2023-12-29
Patent
Elektronische Ressource
Chinesisch
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