The application is suitable for the
electric vehicle thermal management field, and provides a
power battery pre-cooling closed-loop decision method and device for
fast charging, which comprises the following steps: obtaining the state information of the vehicle, candidate
fast charging station,
power battery, environment, passenger cabin and
thermal management system; determining the target
fast charging station; predicting the SOC of the
power battery at the
station; solving the target pre-
cooling temperature at the station according to the predicted
arrival time, the SOC at the station, the candidate power battery temperature at the station, the fast charging time, the pre-
cooling energy consumption and the comfort influence of the passenger cabin; generating the power battery temperature reference track according to the temperature, and tracking control is performed on the actuators such as compressors, cooling liquid pumps, fans and valves through the hierarchical controller; and the target
fast charging station, the SOC at the station, the target pre-
cooling temperature at the station and the control amount are updated according to the state change, and closed-loop re-planning is formed. The application can shorten the fast charging time, comprehensively optimize the fast charging benefit, the pre-
cooling energy consumption and the comfort of the passenger cabin, and has good working condition adaptability.