Water-loss prevention and short-circuit prevention bag type alkali storage battery

Abstract

The invention discloses a water-loss prevention and short-circuit prevention bag type alkali storage battery. The water-loss prevention and short-circuit prevention bag type alkali storage battery comprises a battery shell, a pole plate, a battery cover, a positive binding post and an air plug, wherein the positive binding post and the air plug are arranged on the battery cover, and a layer of polypropylene punched felt is arranged between a bag type positive pole plate and a bag type negative pole plate. An existing polypropylene mesh grid partition plate is substituted by the polypropylene punched felt, the positive pole plate and the negative pole plate of the battery are separated, the bag type alkali storage battery has excellent acid and alkali resistant performance, is high in strength and is difficult to deform, and internal short circuit is prevented as long as the felt is not punched even the pole plates are expanded and deformed; meanwhile, the polypropylene punched felt is good in porosity and air permeability, the internal pressure of the battery can be reduced by gas recombination efficiency during the charge-discharge process, and the electrolyte diffusion resistance is small; and moreover, the bag type alkali storage battery has a certain liquid absorption and storage capability, the water supplement frequency of an electrolyte is reduced, and particularly, convenience is brought to the battery applied under a remote occasion or an unattended occasion.

Description

Technical field: [0001] The invention relates to a dehydration-proof and short-circuit-proof bag-type alkaline storage battery suitable for installation and use on railways, power switches, remote communications, emergency lighting and other equipment. Background technique: [0002] In the existing polar plate bag-type alkaline storage battery, the separator separating the positive and negative plates is a polypropylene separator with a grid structure, and the separator is solid non-porous polypropylene except for the edges and ribs in the grid. , the grid holes are all-through. The separator of this structure only plays a role in isolating the positive and negative plates of the battery, without any ability to absorb and store liquid. The active material will gradually expand during the cycle, and the expansion rate can reach 10-20%. After expansion, the positive and negative electrodes will be deformed. The deformed positive plate can easily contact the negative electrode...

AI Technical Summary

Problems solved by technology

The separator of this structure only plays a role in isolating the positive and negative plates of the battery, without any ability to absorb and store liquid. The active material will gradually expand during the cycle, and the expansion rate can reach 10-20%. After expansion, the positive and negative electrodes will be deformed. The deformed positive plate can easily contact the negative electrode directly through the mesh holes, resulting in a short circuit inside the battery. , so that the end of battery life

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