降低MH/Ni电池内压的快速充电方法  

Fast charging method for decreasing the inner pressure of Ni/MH battery

作　　者：胡道中[1] 陈实[1] 单中强[2] 吴锋[1] 王敬[1] 李德伟[1] 

机构地区：[1]北京理工大学化工与环境学院,北京100081 [2]天津大学化工学院,天津300072

出　　处：《电池》2006年第2期127-128,共2页Battery Bimonthly

基　　金：北京市重点实验室基金(SYS100070416);973项目(2002CB211800);863项目(2005AA501240)

摘　　要：气相色谱法研究的结果表明:氢气是MH/Ni电池充电过程中产生气体的主要成分。MH电极中氢原子的缓慢扩散限制了电池的快速充电。通过恒电位极化法,测定了MH电极在不同荷电态(SOC)下的氢扩散系数。结果表明:在同一温度下,氢扩散系数随着SOC的增大,呈指数关系衰减。根据SOC来调节电流的充电方法,能降低MH/Ni电池快速充电时的内压。Gas chromatography method was used to analyze the component of gases that were produced in the Ni/MH battery charging process. Results showed that hydrogen was the main gas. Fast charging was limited by the slowness of hydrogen atom diffusion in metal hydride electrode. Hydrogen diffusion coefficient of metal hydride electrode at different state of charge （SOC） was measured by the method of potentiostatic pohrization. Results showed that hydrogen diffusion coefficient exponential decreased with the increase of SOC at the same temperature. The inner pressure of Ni/MH battery during fast charging could be decreased by using the charging method which regulated the current for SOC.

关 键 词：气相色谱 内压 氢扩散系数 快速充电 

分 类 号：TM912[电气工程—电力电子与电力传动]