摘要
对通信行业中运行使用的阀控密封铅酸蓄电池失效模式进行了研究,对失效电池进行了解剖和X射线衍射、电镜扫描和化学等分析。研究结果表明:电池处于长期深放和充电不足等恶劣的使用环境,容易产生部分“落后电池”,这是一种典型的“早期容量损失(PCL)”现象,电池失效是由于正极活性物质形成“珊瑚状”结构,活性物质比表面积降低,可参与反应的活性物质数量减少,导致活性物质利用不足所致,这种可逆容量损失可以通过采用合适的循环制度,使失去的容量恢复。
The failure modes of the valve-regulated lead-acid (VRLA)batteries used widely in telecommunication systems were studied in this paper. The failed batteries were dissected and analyzed by X-ray diffraction (XRD) and SEM ect. The results show that under the bad condition of a long time deep discharge and undercharge, there will be produce some 'drop behind batteries', this is a typical phenomenon called 'PCL'. The structure of the positive active material (PAM) turns to a structure of 'coralgal', then the specific area PAM reduces, It results in the lack of the PAM with reactivity. This PCL can be restored by the correct cyclic charge algorithm.
出处
《电源技术》
CAS
CSCD
北大核心
2004年第1期38-42,共5页
Chinese Journal of Power Sources
