公交车动力电池起火原因分析

Cause Analysis of Bus Power Battery Ignition

公交车在更换电池行驶约15分钟后,出现冒烟、起火等现象。本文通过宏观检查、电压检测、剩磁检测、金相分析、高温试验等手段进行分析。最终发现由于电池箱内部的正极导线和负极端子导线紧邻,负极端子与电池托架负极插孔未有效接触,致使在车辆运行时,负极端子产生高温,导致电池箱连接器处的绝缘材料和负极端子与正极导线相接触的绝缘材料烧熔,发生一次短路,引起电池箱起火。本文所用的分析方法有助于科技人员根据失效模式的表象分析出具体的失效原因。

Bus in the replacement of the battery after about 15 minutes, there smoke, fire and other phenomena? In this paper, macroscopic inspection, voltage detection, remanence detection, metallographic analysis, high temperature test and other means of analysis? It is found that the negative terminal of the battery box has a high temperature due to the non-effective contact between the positive lead wire and the negative terminal wire inside the battery case, and the negative terminal is not effectively brought into contact with the negative electrode jack of the battery holder, resulting in an insulating material and a negative electrode The terminal and the cathode wire contact with the insulation material melting, a short circuit occurs, causing the battery box fire. The analysis method used in this paper is helpful for the scientific and technical personnel to analyze the specific failure reason according to the failure mode?