The invention discloses a fault diagnosis method and system for a thermal management system of an electric vehicle, and the method comprises the steps: judging whether battery temperature data is missing or not, and if not, screening out all charging segments; and judging whether the duration of the charging segment is greater than a set duration, if so, calculating the maximum value of the battery temperature in the current charging process and the charging temperature mode of the current batch of vehicles, judging whether the weighted sum of the maximum value and the temperature mode is greater than a set temperature, and if so, judging that the cooling system has a fault. The problems that in the prior art, faults are difficult to comprehensively locate, and consequently vehicle battery loss is accelerated and potential safety hazards are large are solved.
本发明公开了一种电动汽车热管理系统故障诊断方法及系统,判断电池温度数据是否缺失,若否,则筛选出所有的充电片段;判断充电片段时长是否大于设定时长,若是,则计算当前充电过程电池温度的极大值和当前批次车辆充电温度众数,判断所述极大值和温度众数的加权和是否大于设定温度,若是,则判定散热系统存在故障。本发明解决了现有技术中难以全面定位故障,造成车辆电池损耗加速和安全隐患大的问题。
Fault diagnosis method and system for thermal management system of electric vehicle
电动汽车热管理系统故障诊断方法及系统
2024-03-19
Patent
Electronic Resource
Chinese
IPC: | B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht |
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