阀控式铅蓄电池失效原因及容量恢复

通过对失效的阀控式铅蓄电池进行的容量恢复实验及解剖分析，提出了失水是导致阀控式铜蓄池失效的主要原因以及失效电池容量恢复的方法，并讨论了硫化，正极板栅腐蚀，正极活性物质软化及短路等故障及其与失水之间的关系。     

VRLA蓄电池常见故障及其诊断处理方法

贫液式VRLA蓄电池的常见故障有硫化、失水、短路、正极板栅严重腐蚀、热失控和早期容量损失（PCL）等,由于这些故障有伴生现象,给故障的诊断带来难度。文中将故障诊断与故障处理相结合,根据故障电池充放电过程中出现的现象,判断出不可修复的短路和正极板栅严重腐蚀故障和可修复的PCL、硫化和失水故障,并结合实例介绍故障修复的方法。     

镉镍蓄电池内阻特性研究

介绍了电池内阻及两种电池模型,阐述了交流电桥法测量电池内阻的原理。经过对多种圆柱型密封镉镍蓄电池组用不同的充、放电制度进行电池内阻特性研究实验,表明了镉镍蓄电池在充、放电过程中内阻值波动较大,随充、放电程度的加深内阻增大;在充、放电后期电池内阻上升速率加快;当充电态内阻变化△R比放电态的大时,电池性能更优良;电池内阻过大,充放电过程中△R偏高,充电效率极低,则电池性能差、寿命短。     

VRLAB的失效模式及其影响因素

对VRLAB的结构特点、失效模式的种类、各失效模式发生时的现象以及容量恢复方法进行了介绍,对电池结构和使用因素对失效模式的影响以及各失效模式之间的相互影响进行了讨论。     

铅蓄电池正极腐蚀现象的研究

对一组因正极极耳腐蚀、断裂的失效铅蓄电池进行了失效机理和故障现象的研究。结果表明，带电解液搁置的铅蓄电池会因正极极耳的原电池电化学反应而发生腐蚀和断裂，严重影响电池的循环寿命。发现铅蓄电池的正极极耳发生严重腐蚀或断裂时，会出现充电时电压偏高、电解液密度偏低，放电时正极极柱发热、容量很低和电池内阻明显偏高等现象。     

6.0mol•L－1KOH溶液中锌单晶（002）和（100）晶面的电化学行为

In this article, the electrochemical performance of the electrodes of zinc polycrystal, Zn（002） and Zn（100） single crystals were studied by the Tafel line extrapolation of the potentio-dynamic polarization curves, the cyclic voltammetry and the charge/discharge experiment. The results shows that in 6.0 mol·L^-1 KOH solution the corrosion rate of Zn polycrystal, Zn（100） and Zn（002） single crystals decreases in turn; and the reversibility and the charge/discharge performance of Zn single crystal was superior to Zn polycrystal. The dendrite growth of the surface of Zn polycrvstal was easier than Zn single crystal during the stages of charge/discharge.     

Electrochemical Performance of Zn(002) and Zn(100) Single Crystals in 6.0mol·L~(-1) KOH

1 INTRODUCTION The zinc based batteries have high energy/power densities that compared with other alkaline batteries. Although these batteries are commercially available, the problems of the zinc electrode such as dendrite growth, shape change and high dissolution are not completely overcome. So far, many attempts have been undertaken to overcome these difficulties, but the problems still remain elusive[1―4]. The single crystal has definite atomic structure at the surface, so it has the …