关键词: 纯电动汽车；液冷动力电池；AMESim；试验设计

Abstract: In view of the discrepancy between the charging test results of existing power battery system test benches and the vehicle charging test data, the bench test results are difficult to be directly applied to the vehicle development process. To effectively address the above issue, this paper proposes a test scheme. Based on the composition architecture and control strategy of the vehicle thermal management system, AMESim software is used for simulation calculations to obtain the temperature data of the coolant after flowing through the vehicle thermal management system under different temperature conditions. Subsequently, according to the simulation results, a water chiller is used to output coolant at specific temperatures, and relevant data are verified through comparisons between vehicle tests and bench tests. The results show that under the test conditions of 40 ℃ and -20 ℃, the difference in total charging completion time between the two is less than 1%; the average absolute errors in temperature on the time axis are 0.717 and 0.530, respectively. These results indicate that through the design of the test scheme, the bench test and vehicle test results exhibit high consistency, can meet actual engineering requirements, and are of great significance for improving the development efficiency of vehicle projects.

Key words: battery electric vehicle; liquid-cooled power battery; AMESim; test design