圆柱形铅酸蓄电池的开发

Cylindrical lead acid battery(VRLA)

制成了圆柱形铅蓄电池，其特点是：（１）用铅锑镉合金冲制外壳，并配一个马口铁制的外底；（２）正极是铅合金柱外包ＰｂＯ２，负极是在０．５ｍｍ的板栅上涂膏，连同隔膜包在正极上。负极与筒靠接触导电，不须焊接；（３）在封口物（热熔胶）与筒壁之间备有一层憎水的微孔膜，空气不会进入；盖子下面有一层吸酸的碱性物质。大电流充电不渗酸。本电池价格低，工艺简单，自放电很小，比能量３７Ｗｈ／ｋｇ，其工艺特别适用于制Ｒ６以下型号的电池。

A cylindrical lead acid battery has been developed.It is characterized by:(1)The Pb Sb Cd alloy is deep drawn into a can shape,and a tinned outer bottom is attached for strengthening.(2)The bobbin type positive electrode is made by a lead alloy with powdered PbO 2 packed around it.This block is wrapped in a separator and a pasted negative electrode with 0.5mm thickness grid.The battery container contacts the negative electrode and serves as the negative terminal,so there is no need to weld in this battery.(3)A hydrophobic millipore membrane is placed between the can wall and the thermosol encapsulated at the battery top;an alkaline acid-absorption agent is putted under the top cover ,so air entering and acid leakage are not available.The battery features simple technology,little self discharge,and low cost.It’s energy density is 37 Wh/kg.This cylindrical construction is beneficial to small size batteries such as R6 and so on.