Abstract: A 2019 BYD Qin EV battery electric vehicle has a failure to charge. This article takes the failure to charge as a starting point, introduces the difference between the 2019 BYD Qin EV and the same model of the previous generation, and briefly explains the working principle and process of the chargings system. Combined with the actual situation, the paper summarized several common fault phenomena and corresponding data flows in the system, and pointed out the possible range of faults by combining phenomena. In addition, combining the problems that novices are prone to, we propose specific fault diagnosis methods for reference.

Key words: BYD Qin EV; Battery electric vehicle; Charging system; Fault diagnosis; Troubleshooting

摘要： 一辆 2019 款比亚迪秦 EV 纯电动汽车出现不能充电故障，文章以不能充电的故障为出 发点，介绍了 2019 款比亚迪秦 EV 与前代同款车型的区别，简单讲解了本款车型的充电系统 工作原理和工作过程，结合实际，总结归纳了充电系统出现的几种常见故障现象及相应的数 据流，并结合现象指出了故障可能发生的范围。另结合新手容易出现的问题，提出具体的故 障诊断方法，谨供参考。

关键词: 比亚迪秦 EV；纯电动汽车；充电系统；故障诊断；故障排除