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1绪言近几年来、新线建设、复线改造和车辆新造等计划，正在国营、私营各铁路公司中积极进行。主要为解决城市人口剧增所带来的运力不足矛盾。在这些新线计划的执行和新型车辆的开发中，车辆用蓄电池的最新动向是向小型、轻量化方面发展，而且，特别是对维护保养的省力化提出了
1 INTRODUCTION In recent years, plans for the construction of new lines, the reconstruction of double-track lines and the construction of vehicles have been actively carried out by state-owned and private railway companies. Mainly to solve the dramatic increase in urban population brought by insufficient capacity contradictions. In the implementation of these new line plans and the development of new vehicles, the latest trend of vehicle batteries has been toward miniaturization and weight reduction. In particular, the maintenance and labor saving has been put forward