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Composite electrolyte for colloidal lead-acid battery

A lead-acid battery and electrolyte technology, used in lead-acid batteries and other directions, can solve the problems of electrical performance not meeting the promulgated indicators, low capacity and starting discharge performance, and obvious solid-liquid interface, etc. rate increase, improve the effect of small capacity

Inactive Publication Date: 2011-11-30
CHISEN POWER JIANGSU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the electrical performance is still not up to the promulgated indicators, its capacity and starting discharge performance are lower than those of conventional sulfuric acid liquid batteries, and the colloidal electrolyte is more prone to hydration stratification, and a solid-liquid interface will appear, which will cause the battery to fail.

Method used

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  • Composite electrolyte for colloidal lead-acid battery
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Embodiment Construction

[0008] Weigh silicon dioxide, sulfate, polyacrylamide (PAM) and sodium carboxymethyl cellulose (CMC) with a particle size of 5-20 nm in proportion, add deionized water to the mixed solution and stir statically. Slowly add 98% concentrated sulfuric acid and sulfate to the mixed solution and carry out ultrasonic dispersion for 10-20 minutes, and leave it for 2 days to make it stable, that is, the colloidal composite electrolyte for lead-acid batteries is made.

[0009] The specific feed composition of each component accounts for the weight percentage (100%) of the total feed:

[0010] Scheme 1 (1#): SiO 2 : 0.2%, Na 2 SO 4 : 0.02%, K 2 SO 4 : 0.1%, MgSO 4 : 0.02%, H 2 SO 4 : 52.62%, polyacrylamide (PAM): 0.1%, sodium carboxymethylcellulose (CMC): 0.01%, La 2 (SO 4 ) 3 : 0.001%, the rest is deionized water.

[0011] Scheme 2 (2#): SiO 2 : 0.3%, Na 2 SO 4 : 0.2%, K 2 SO 4 : 0.04%, MgSO 4 : 0.1%, H 2 SO 4 : 50.26%, polyacrylamide (PAM): 0.03%, sodium carboxymethy...

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Abstract

The invention discloses a composite electrolyte for a gel lead acid storage battery, and belongs to the technical field of storage battery production. The composite electrolyte adopts polyacrylamide and sodium carboxy methyl cellulose as a hybrid deflocculating agent, takes metal sulphate as an additive and optimizes battery performance by changing the content of each component. The early capacity loss of the battery can be reduced; the problem of low capacity of the gel battery can be solved; the battery has high charging acceptance performance and low moisture loss and hardly produces thermal runaway; the after-deep-discharge recovery performance of the battery is remarkably superior to that of an ordinary lead acid battery; the utilization rates of active substances of battery electrodes are increased; and the performance of the battery can be greatly improved. The gel lead acid battery solves the problems of low battery capacity, low after-deep-discharge recovery performance, high hydration demixing rate of colloidal electrolyte in charging and discharging processes, and the like.

Description

technical field [0001] The invention belongs to the technical field of storage battery production. Background technique [0002] Lead-acid battery refers to a battery whose electrodes are mainly made of lead and its oxides, and the electrolyte is a sulfuric acid solution. Lead-acid batteries have the advantages of small internal resistance and high discharge current density. From the 1980s to the present, by improving the performance of colloidal electrolytes, colloidal electrolyte lead-acid batteries have made great progress. However, because the electrical performance is still not up to the promulgated indicators, its capacity and starting discharge performance are lower than those of conventional sulfuric acid liquid batteries. The colloidal electrolyte is more prone to hydration stratification, and a solid-liquid interface will appear, which will cause the battery to fail. Adding composite additives to the colloidal electrolyte has the advantages of not changing the ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/10
CPCY02E60/126Y02E60/10
Inventor 刘天晴左明明王莹吴非
Owner CHISEN POWER JIANGSU CO LTD
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