Solid electrolyte for lead-acid storage battery

A lead-acid battery, solid-state technology, applied in the direction of lead-acid batteries, etc., can solve the problems of poor deep discharge performance, easy leakage of batteries, easy loss of water, etc.

Inactive Publication Date: 2012-08-22
四川久远环通电源有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to provide a solid-state electrolyte for lead-acid batteries to solve the problems of easy leakage, water loss and poor deep discharge performance of existing batteries

Method used

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  • Solid electrolyte for lead-acid storage battery

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Experimental program
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Effect test

Embodiment 2

[0023] Add 15g of silica powder, 5g of aluminum oxide powder, 40g of tetrafluoroethylene-vinylidene fluoride copolymer, and 500g of acetone solution of dibutyl phthalate (mass concentration: 0.8%) to a mixing chamber In a container, heat to 50°C and stir to form a uniform slurry. The resulting slurry is coated into a film with a coating machine, and the film is washed with methanol to remove dibutyl phthalate and acetone in the film to obtain a modified tetrafluoroethylene-vinylidene fluoride copolymer with a microporous structure membrane. The obtained membrane is then immersed in sulfuric acid, taken out after the adsorption is saturated, and dried in air to obtain a solidified electrolyte, which can absorb 54g of sulfuric acid per 100g of membrane.

Embodiment 3

[0025] Add 5g of silicon dioxide powder, 25g of aluminum oxide powder, 30g of tetrafluoroethylene-vinylidene fluoride copolymer, and 1000g of dibutyl phthalate in acetone (mass concentration: 1.8%) to a mixer In a container, heat to 50°C and stir to form a uniform slurry. The resulting slurry is coated into a film with a coating machine, and the film is washed with methanol to remove dibutyl phthalate and acetone in the film to obtain a modified tetrafluoroethylene-vinylidene fluoride copolymer with a microporous structure membrane. The obtained membrane is then immersed in sulfuric acid, taken out after the adsorption is saturated, and dried in air to obtain a solidified electrolyte, which can absorb 185g of sulfuric acid per 100g of membrane.

[0026] A 40Ah lead-acid battery (lead dioxide positive electrode / solid electrolyte / sponge negative electrode / solid electrolyte / sponge negative electrode / ..... . / Solidized Electrolyte / Lead Dioxide Cathode). After the battery is deep...

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Abstract

The invention discloses a solid electrolyte for a lead-acid storage battery, which comprises sulfuric acid and a modified tetrafluoroethylene-vinylidene fluoride copolymer with a microporous structure, the quality content of the sulfuric acid in the solid electrolyte ranges between 35% and 65%, and the sulfuric acid is absorbed inside hole passages of the modified tetrafluoroethylene-vinylidene fluoride copolymer with the microporous structure through a capillary action. The solid electrolyte solves the problems of liquid leakage and water loss in lead-acid storage batteries, stratification of a colloidal electrolyte is avoided, and after the lead-acid storage battery of the solid electrolyte is charged and discharge repeatedly for 200 times, voltage and discharge capacity are still good.

Description

technical field [0001] The invention belongs to the field of lead-acid batteries, and in particular relates to a solid-state electrolyte for lead-acid batteries. Background technique [0002] Lead-acid battery refers to a battery whose electrodes are made of lead and its oxides, and the electrolyte is sulfuric acid solution. Lead-acid battery has a history of more than 200 years and is a widely used power source. Since its invention, because of its low price, easy access to raw materials, reliable and stable performance, it is suitable for large current discharge and a wide range of ambient temperature, etc. Advantages, has always had an absolute advantage in chemical power. [0003] Ordinary lead-acid batteries have the disadvantages of easy leakage, water loss, and poor deep discharge performance. In order to solve these technical problems, the concept of colloidal electrolyte was proposed to reduce the fluidity of the electrolyte. It is prone to hydration stratification...

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 孙礼安王洪熊明成何平
Owner 四川久远环通电源有限责任公司
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