AGM separator with high liquid absorption capacity and preparation method thereof

A technology with high liquid absorption and separators, which is applied in the direction of separators/films/diaphragms/spacers, electrical components, circuits, etc., can solve the problem of AGM separator imports, poor performance of AGM separators, and poor battery life and other problems, to avoid over-drying, uniform pore size, and energy saving effects

Active Publication Date: 2016-03-30
重庆造纸工业研究设计院有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the performance of domestically produced AGM separators is obviously inferior to that of similar foreign products. Usually, the liquid absorption of domestically produced AGM separators is only 50-70% of that of foreign products. In terms of endurance and service life, it is far inferior to electric vehicles using foreign-made AGM partitions
[0004] Therefore, it is necessary to develop a new type of AGM separator and the corresponding manufacturing method to solve the current problem that domestic high-end AGM separators need to be imported

Method used

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  • AGM separator with high liquid absorption capacity and preparation method thereof

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Embodiment 1

[0026] The method for preparing the AGM separator with high liquid absorption capacity in this embodiment comprises the following steps:

[0027] 1), dispersion pulping: get 85 parts of high-alkali glass fiber cottons with an average diameter of 1.1um and 15 parts of high-alkali glass fiber cottons with a diameter of 2.5um and add them into a beater for beating and disperse;

[0028] 2), mixing step 1) disperse the slurry obtained by pulping;

[0029] 3), add water to dilute the mixed slurry to a concentration of 0.3%, and perform slag removal treatment;

[0030] 4), the step 3) diluted slurry is sent to the forming device to form a wet partition;

[0031] 5), suction dehydration: make the wet cardboard in step 4) sequentially pass through multi-stage vacuum suction devices for suction dehydration, so that the moisture content of the wet partition is lower than 35% (about 30% in this embodiment);

[0032] 6) Drying at low temperature: drying the wet cardboard dehydrated in s...

Embodiment 2

[0039] The method for preparing the AGM separator with high liquid absorption capacity in this embodiment comprises the following steps:

[0040] 1), dispersion pulping: get 80 parts of high-alkali glass fiber cottons with a diameter of 1.5um and 20 parts of high-alkali glass fiber cottons with a diameter of 3um and add them into a beater for beating and disperse;

[0041] 2), mixing step 1) disperse the slurry obtained by pulping;

[0042] 3), adding water to dilute the mixed slurry to a concentration of 0.5% and performing slag removal;

[0043] 4), the step 3) diluted slurry is sent to the forming device to form a wet partition;

[0044] 5), suction dehydration: make the wet paperboard in step 4) sequentially pass through multi-stage vacuum suction devices for suction dehydration, so that the moisture content of the wet partition is about 33%;

[0045] 6) Drying at low temperature: drying the wet cardboard dehydrated in step 5) at 120-150°C.

[0046] In this example:

...

Embodiment 3

[0052] This embodiment prepares the method for preparing AGM separator with high liquid absorption capacity, comprising the following steps:

[0053] 1), dispersion pulping: get 90 parts of high-alkali glass fiber cotton with a diameter of 0.8um and 10 parts of high-alkali glass fiber cotton with a diameter of 2um and add them to a beater for beating and disperse;

[0054] 2), mixing step 1) disperse the slurry obtained by pulping;

[0055] 3), add water to dilute the mixed slurry to a concentration of 0.2%, and perform slag removal treatment;

[0056] 4), the step 3) diluted slurry is sent to the forming device to form a wet partition;

[0057]5), suction dehydration: make the wet cardboard in step 4) go through multi-stage vacuum suction device successively for suction dehydration, so that the moisture content of the wet partition is about 28%;

[0058] 6) Drying at low temperature: drying the wet cardboard dehydrated in step 5) at 120-150°C.

[0059] In this example:

...

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Abstract

The invention discloses an AGM separator with high electrolyte absorption capacity. The AGM separator comprises 80-90 parts of high alkali glass fiber cotton with diameter being 0.8-1.5 microns and 10-20 parts of high alkali glass fiber cotton with diameter being 2-3 microns. The AGM separator has the properties that the porosity is higher than 95%, the electrolyte absorption capacity is higher than 8.8g / g, the maximum pore size is less than 18 microns, the acid boiling resisting time is longer than 8 minutes, and the intensity is higher than 1700N / m. A preparation method of the AGM separator comprises the steps of preparing slurry from the glass fiber cotton separately, mixing the slurry prepared separately, diluting the mixed slurry, removing slag, feeding the slurry to a former for forming, performing suction dehydration on formed wet paper in five stages, and finally drying the paper at low temperature to obtain the AGM separator. The diameter and the content of thick and fine fibers in the AGM separator are reasonable, the slurry is prepared separately and the suction dehydration is performed in five stages in the preparation process, the finished AGM separator has the characteristics of high strength, high and uniform porosity and high electrolyte absorption capacity.

Description

technical field [0001] The invention belongs to the field of basic electrical components and relates to an AGM separator, in particular to an AGM separator with high liquid absorption and a preparation method thereof. Background technique [0002] Electric vehicles have developed rapidly in recent years, and with the depletion of oil resources, it is foreseeable that electric vehicles will achieve further development. Electric vehicles generally use lead-acid batteries as energy storage devices for electric vehicles. At present, lead-acid batteries generally use PVC or PE as separator materials. Although PVC and PE separators have good mechanical properties, their durability and porosity Poor, can not meet the use requirements. Ultra-fine glass fiber separator (AGM) is a new type of separator material developed in recent years. It is made of ultra-fine glass fiber through emulsification, washing and drying. AGM separators have the advantages of good acid resistance, high p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/16H01M2/18
CPCH01M50/4295H01M50/44H01M50/463Y02E60/10
Inventor 郭茂秦大江
Owner 重庆造纸工业研究设计院有限责任公司
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