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AGM diaphragm for winding battery and preparation method of AGM diaphragm

A diaphragm and battery technology, applied in the field of AGM diaphragm for winding batteries and its preparation, can solve the problems that the AGM diaphragm cannot meet the requirements of wound lead-acid batteries, and achieve the prevention of lead dendrite short circuit, small internal resistance, and acid absorption good performance

Pending Publication Date: 2022-03-04
中材科技膜材料(山东)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the fact that the AGM diaphragm in the prior art cannot meet the requirements of the wound lead-acid battery, the present invention provides an AGM diaphragm for a wound battery and a preparation method thereof to solve the above technical problems

Method used

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  • AGM diaphragm for winding battery and preparation method of AGM diaphragm

Examples

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Embodiment 1

[0025] An AGM diaphragm for winding batteries, the thickness of which is 0.8 mm, comprises the following components in parts by weight: 85 parts of glass fiber, 3 parts of silica airgel, and 6 parts of molecular sieve.

[0026] (1) Put the mixed glass fiber and water into the deflagging machine 1, and decompose for 10 minutes; then add 4 parts of 85% sulfuric acid to disperse, so that the fibers are evenly dispersed;

[0027] (2) Gravity dehydration of the uniformly dispersed slurry in the forming section to obtain a wet paper web with high water content;

[0028] (3) Silica airgel and ground molecular sieves are added into the deflagging machine two, and water and 0.5 part of 85% sulfuric acid are added to disperse evenly;

[0029] (4) Immerse the wet paper web prepared in step (2) into the suspension of silica aerogel and molecular sieve uniformly dispersed in step (3), and carry out soaking treatment; the wet paper web after soaking is carried out gravity dehydration and mo...

Embodiment 2

[0032] An AGM diaphragm for winding batteries, the thickness of which is 1.2 mm, comprises the following components in parts by weight: 92 parts of glass fibers, 4 parts of silica airgel, and 4 parts of molecular sieves.

[0033] (1) Put the mixed glass fiber and water into the deflagging machine 1, and decompose for 10 minutes; then add 4 parts of 85% sulfuric acid to disperse, so that the fibers are evenly dispersed;

[0034] (2) Gravity dehydration of the uniformly dispersed slurry in the forming section to obtain a wet paper web with high water content;

[0035] (3) Silica airgel and ground molecular sieves are added into the deflagging machine two, and water and 0.5 part of 85% sulfuric acid are added to disperse evenly;

[0036] (4) Immerse the wet paper web prepared in step (2) into the suspension of silica aerogel and molecular sieve uniformly dispersed in step (3), and carry out soaking treatment; the wet paper web after soaking is carried out gravity dehydration and ...

Embodiment 3

[0039] An AGM diaphragm for winding batteries, the thickness of which is 1.5 mm, comprises the following components in parts by weight: 95 parts of glass fiber, 5 parts of silica airgel, and 5 parts of molecular sieve.

[0040] (1) Put the mixed glass fiber and water into the deflagging machine 1, and decompose for 12 minutes; then add 4 parts of 85% sulfuric acid to disperse, so that the fibers are evenly dispersed;

[0041] (2) Gravity dehydration of the uniformly dispersed slurry in the forming section to obtain a wet paper web with high water content;

[0042] (3) Silica airgel and ground molecular sieves are added into the deflagging machine two, and water and 0.5 part of 85% sulfuric acid are added to disperse evenly;

[0043] (4) Immerse the wet paper web prepared in step (2) into the suspension of silica aerogel and molecular sieve uniformly dispersed in step (3), and carry out soaking treatment; the wet paper web after soaking is carried out gravity dehydration and mo...

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Abstract

The invention relates to an AGM diaphragm for a winding battery and a preparation method of the AGM diaphragm, and belongs to the technical field of battery diaphragms. The thickness of the composite material is 0.6-1.5 mm, and the composite material comprises the following components in parts by weight: 85-95 parts of glass fibers, 3-5 parts of silicon dioxide aerogel and 4-6 parts of molecular sieves. According to the AGM diaphragm for the winding battery, the needle-shaped glass fibers are used, needle-shaped objects are in staggered lap joint in the forming process, and wet paper webs formed after lap joint contain a large number of pores. And fine silicon dioxide aerogel and the porphyrized molecular sieve are mixed in pores in a dipping manner, so that the pores of the original diaphragm are effectively filled, the pore size is reduced, short circuit of lead dendrites can be prevented, and the cycle life of the battery is prolonged. Meanwhile, the aerogel and the molecular sieve are added, so that the acid absorption property of the diaphragm is improved, the acid absorption property is good, the internal resistance of the battery is small, and enough electrolyte can be absorbed to ensure high-capacity discharge of the battery.

Description

technical field [0001] The invention relates to the technical field of battery separators, in particular to an AGM separator for winding batteries and a preparation method thereof. Background technique [0002] In recent years, under the pressure of energy and environmental protection, the development of new energy and its application has been promoted. Driven by renewable energy such as solar energy and wind energy, emerging markets such as smart grids and electric vehicles, battery technology, one of its main components, needs new breakthroughs. The lead-acid battery is bound to have greater development due to its advantages such as mature technology, low price, abundant resources, and recyclability. [0003] In recent years, lead-acid battery technology has been developing continuously. Winding battery is a product that has developed rapidly in recent years. It is different from the flat laminated structure of ordinary lead-acid batteries. Both are sandwiched with glass...

Claims

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Application Information

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IPC IPC(8): H01M50/40H01M50/403H01M50/44
CPCH01M50/40H01M50/403H01M50/44Y02E60/10
Inventor 白亚飞渠继鹏朱潇项朝卫李强王吻徐正琦李号
Owner 中材科技膜材料(山东)有限公司
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