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Carbon foam separator of lead-acid cell

A lead-acid battery, carbon foam technology, applied in lead-acid batteries, battery pack parts, separators/films/diaphragms/spacers, etc. problems, to achieve the effect of improving service life, stable structure and slow diffusion

Active Publication Date: 2014-12-10
TAICANG PAIOU TECH CONSULTING SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The porous structure of carbon foam, excellent corrosion resistance and many other advantages make it a good separator material, but the carbon foam in the existing research cannot be used as a battery separator, which greatly limits the use of carbon foam. body application

Method used

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  • Carbon foam separator of lead-acid cell

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A carbon foam lead-acid battery separator is characterized in that the AGM separator is made of carbon foam and amorphous SiO 2 Composition, amorphous SiO 2 Evenly adhere to the inner wall of the carbon foam hole, and completely cover the carbon foam hole. Amorphous SiO 2 The attached thickness is 5nm. The pores of the carbon foam are relatively spherical and evenly distributed. The carbon foam has a pore size of 5 μm, a porosity of 70%, and a compressive strength of 20 MPa.

Embodiment 2

[0023] A carbon foam lead-acid battery separator is characterized in that the AGM separator is made of carbon foam and amorphous SiO 2 Composition, amorphous SiO 2 Evenly adhere to the inner wall of the carbon foam hole, and completely cover the carbon foam hole. Amorphous SiO 2 The attached thickness is 50nm. The pores of the carbon foam are relatively spherical and evenly distributed. The carbon foam has a pore size of 100 μm, a porosity of 85%, and a compressive strength of 12 MPa.

Embodiment 3

[0025] A carbon foam lead-acid battery separator is characterized in that the AGM separator is made of carbon foam and amorphous SiO 2 Composition, amorphous SiO 2 Evenly adhere to the inner wall of the carbon foam hole, and completely cover the carbon foam hole. Amorphous SiO 2 The attached thickness is 100nm. The pores of the carbon foam are relatively spherical and evenly distributed. The carbon foam has a pore size of 200 μm, a porosity of 95%, and a compressive strength of 6 MPa.

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Abstract

The invention discloses a carbon foam separator of a lead-acid cell. The carbon foam AGM separator is characterized by being composed of carbon foam and amorphous SiO2 which is attached to the inner walls of carbon foam holes uniformly and covers the carbon foam holes completely, wherein the attaching thickness of amorphous SiO2 ranges from 5nm to 100nm; the carbon foam holes are relatively spherical and are uniformly distributed, the pore size of the carbon foam holes ranges from 5 microns to 200 microns, the porosity of the carbon foam holes ranges from 70% to 95%, and the compressive strength of the carbon foam holes ranges from 5MPa to 20MPa. The carbon foam separator is capable of lowering the diffusion rate of ions in acid, prolonging the discharge time of the cell and further prolonging the service life of the cell. With the carbon foam as a separator framework, the separator is high in compressive strength, has a stable structure and is unlikely to collapse in a long-time application process.

Description

technical field [0001] The invention relates to a separator for a lead-acid battery, in particular to a carbon foam separator which can be used as a separator for a lead-acid battery. Background technique [0002] The battery separator is a porous insulating material, which is placed between the positive and negative plates of the battery to separate the positive and negative plates and play the role of insulation to avoid short circuit of the battery. At the same time, the ions that participate in the chemical reaction are allowed to pass through during the charging and discharging process of the battery. For the sealed maintenance-free battery, it is also necessary to ensure that the oxygen precipitated from the positive electrode reaches the negative electrode through the separator to complete oxidation absorption. At present, the traditional separators commonly used in China include rubber separators, AGM separators, PVC separators, and PP separators. Among them, AGM se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M50/431H01M50/489
CPCH01M10/06H01M50/409Y02E60/10
Inventor 陈照峰管胜男
Owner TAICANG PAIOU TECH CONSULTING SERVICE