Automatic realization of remote control of integrated components and general instruments in electric vehicle battery EOL test

Abstract

The performance and quality of electric vehicle batteries have an important impact on the user experience of new energy vehicles. The power battery pack needs to go through a strict inspection process before being installed on the vehicle. There is no doubt that the efficiency of battery testing is the key to the production capacity of new energy vehicles. Develop an efficient, practical and stable battery testing system to automate the battery testing process, reduce the misoperation of the testing personnel, ensure the safety of the testing personnel as much as possible and greatly increase the production capacity of new energy vehicles. Nevertheless, the method of general measuring instrument in traditional EOL field test is manual debugging, which has low efficiency and low degree of automation, which cannot meet the increasingly complex field test circuit. Hence, it is very necessary to integrate component automation systems to further improve measurement efficiency. Based on the test content in the EOL test, this paper designs and develops a highly automated test and diagnosis system, introduces several general measuring instruments into the system and discards the VB and MFC in the host computer and replaces it with the introduction of SCPI commands and python. The use of Ethernet to form a path between the physical layer and program control aims to make the automatic testing of general electronic equipment and remote circuit modules a reality. This article introduces the instrument circuit hardware module and host computer language programming module in detail. The final results show that the system has good portability and robustness and is suitable for running on various platforms.