PERFORMANCE TEST METHOD FOR BATTERY THERMAL MANAGEMENT SYSTEM, AND RELATED DEVICE

A performance detection method of the battery thermal management system and a related device are provided in the disclosure, in which a current battery temperature matrix is built based on battery pack operating condition data of a current electric vehicle in a current preset time of period, the current battery temperature matrix is a three-dimensional matrix of battery pack output voltage subintervals, battery pack output current subintervals, and single-cell temperature maximum values in the battery pack. A quotient of each single-cell temperature maximum value in the current battery temperature matrix and corresponding reference single-cell temperature maximum value in a reference battery temperature matrix is formed to obtain a temperature offset of single cell, and all of temperature offsets of single cells are averaged to obtain an attenuation constant characterizing performance attenuation of the battery thermal management system. According to the disclosure, the performance detection of the battery thermal management system is realized based on the battery pack operating condition data of the electric vehicle, and it can be determined whether performance of the battery thermal management system degrades or fails according to the attenuation constant characterizing the performance attenuation of the battery thermal management system.