Lead-acid battery electrolyte

A lead-acid battery and electrolyte technology, applied in lead-acid batteries and other directions, can solve the problems of the battery charging performance to be improved, the composition is complex, the preparation method is cumbersome, etc., and the water loss is reduced, the addition method is simple, and the environment is pollution-free.

Inactive Publication Date: 2014-02-19
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The lead-acid battery electrolyte additive not only has complex components, but also has a cumbersome preparation method, and the charging performance of the battery needs to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation of embodiment 1 lead-acid accumulator electrolyte

[0031] Get 0.134g of 3,5-diaminobenzoic acid and add in 1L sulfuric acid aqueous solution (density is 1.34g / cm3), obtain lead-acid battery electrolyte, the concentration of 3,5-diaminobenzoic acid in this lead-acid battery electrolyte 100ppm.

Embodiment 2

[0032] Preparation of embodiment 2 lead-acid battery electrolyte additive and lead-acid battery electrolyte

[0033] Get 0.67g of 3,5-diaminobenzoic acid and 0.074g of bismuth oxide and mix to obtain the electrolyte additive for lead-acid battery.

[0034] Add the obtained lead-acid battery electrolyte additive to 1L sulfuric acid aqueous solution (density is 1.34g / cm 3 ), the lead-acid battery electrolyte was obtained, the concentration of 3,5-diaminobenzoic acid in the lead-acid battery electrolyte was 500ppm, and the concentration of bismuth ions was 50ppm.

Embodiment 3

[0035] Preparation of embodiment 3 lead-acid battery electrolyte additive and lead-acid battery electrolyte

[0036] Get 0.938g of 3,5-diaminobenzoic acid and 0.104g of bismuth oxide and mix them to obtain the electrolyte additive for lead-acid batteries.

[0037] Add the obtained lead-acid battery electrolyte additive to 1L of sulfuric acid aqueous solution (density is 1.34g / cm 3 ), the lead-acid battery electrolyte was obtained, the concentration of 3,5-diaminobenzoic acid in the lead-acid battery electrolyte was 700ppm, and the concentration of bismuth ions was 70ppm.

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Abstract

The invention discloses a lead-acid battery electrolyte which comprises a sulfuric acid water solution, 3,5-diamidobenzoic acid and bismuth ions. Compared with the prior art, the lead-acid battery electrolyte disclosed by the invention can effectively slow down growth of a passivation film in the charge / discharge process of a grid alloy, so that active substances of a battery can not easily fall off due to passivation of the grid in the deep cyclic use process, thereby avoiding early capacity attenuation of the lead-acid battery; and meanwhile, the hydrogen evolution overpotential of the lead-acid battery can be obviously increased, the water loss of the battery in the cyclic process can be reduced, and the service life of the battery under the deep cyclic use condition can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of lead-acid battery processing, and in particular relates to a lead-acid battery electrolyte. Background technique [0002] Lead-acid batteries have the advantages of high electromotive force, small internal resistance, suitable for large current discharge, reliable performance, long storage life, low price and easy availability of raw materials, so they are widely used. However, traditional lead-acid batteries also have a series of problems such as early capacity decay and short service life. The symptoms are corrosion of the positive plate grid, softening and falling off of the lead paste, and sulfation of the negative plate. [0003] Since the advent of lead-acid batteries in 1859, people have been exploring the addition of certain additives to the electrolyte to revive unusable, sulfated or so-called "dead" batteries, or to increase battery capacity and extend battery life. life. Adding additives to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/08
CPCY02E60/126H01M10/08Y02E60/10
Inventor 刘玉刘清平高根芳邓成智陈清元朱健周文渭佘秋利曹进朱建峰沈旭培李桂发朱惠谢文煜李永奇李丹
Owner TIANNENG BATTERY GROUP
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