一种VRLA蓄电池的电性能试验及失效模式分析

Research on the Electrochemical Performance and Failure Mode of a VRLA Battery

对一种VRLA蓄电池的部分电性能进行了初步探讨。对电池的容量、内阻、密封反应效率、过充电寿命等进行了一系列的试验。试验结束后,将电池进行了解剖。对电池失效原因进行了分析,主要有三条:①正板栅腐蚀严重,活性物质软化脱落;②电池失水;③负极硫酸盐化。

The electrochemical performance of a kind of VRLA battery is presented in this paper. The capacity, internal resistance, the sealed reaction efficiency and the life of overcharge are tested ,and then, the battery is dismantled for fault analysis. There are three main causes, which made the battery failure：①Corrosion of positive grid and the active material softening and shedding, ② Water loss, ③Sulphatation of the negative plate.