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Improved clapboard for accumulator and its preparation method

A battery and separator technology, which is applied in the field of battery separators and its manufacturing, can solve the problems of poor oxidation resistance and aging resistance of the separator, limited application range of the separator, and limited electrolyte storage space, etc. The effect of long board life

Inactive Publication Date: 2005-06-29
JIANGSU SANHUAN IND HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the separators used in colloidal batteries in China are sintered PVC separators. PVC separators are made of pure polyvinyl chloride. The molding method adopts high-temperature sintering. The pores are formed by the gaps between PVC particles. The lower porosity limits the storage space of the electrolyte, and the separator is poor in oxidation resistance and aging resistance. At the same time, it is made of pure PVC, and its affinity with the colloid is not ideal. not wide range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1, 38 parts of polyvinyl chloride, 55 parts of precipitated silica (3.85 parts above 325 mesh, 13.75 parts of 200-325 mesh, 29.15 parts of 100-200 mesh, 5.5 parts of 80-100 mesh, 2.75 parts below 80 mesh part), 3.3 parts of lead stearate, 3.5 parts of dioctyl fatty acid, 0.2 part of carbon black, and then add 65% of the total weight of the above-mentioned components of sodium chloride and 10% of dimethylformamide after uniform mixing, Press it into a tablet at 60°C, then immerse the separator in water, leaching out sodium chloride and dimethylformamide and drying it.

Embodiment 2

[0033] Example 2, 33 parts of polyvinyl chloride, 62 parts of precipitated silica (4.96 parts above 325 mesh, 13.64 parts of 200-325 mesh, 34.10 parts of 100-200 mesh, 8.06 parts of 80-100 mesh, 1.24 parts below 80 mesh part), 1 part of barium stearate, 3.7 parts of dibutyl fat, 0.3 part of carbon black, and then add 60% of the total weight of the above-mentioned components. It is pressed into sheets at 85°C, and the ribs on one side of the separator are formed into an S shape, and then the separator is immersed in water, and the ammonium carbonate and dimethylformamide are dried and leached.

Embodiment 3

[0034] Example 3, 35 parts of polyvinyl chloride, 60 parts of precipitated silica (3.6 parts of 325 mesh or more, 7.8 parts of 250-325 mesh, 9 parts of 200-250 mesh, 9.6 parts of 150-200 mesh, 100-150 mesh 21.6 parts, 4.8 parts of 80-100 mesh, 3.6 parts below 80 mesh), 4.75 parts of barium stearate, 0.25 parts of carbon black combination, plus 52% of the total weight of the above-mentioned components of sodium sulfate, 13% of dimethyl Dimethyl formamide is uniformly mixed, and pressed into tablets at 70°C. One side of the separator is oblique, and then the separator is immersed in water to extract sodium sulfate and dimethylformamide and dry it.

[0035] Note: the number of components indicated in each embodiment is the number of parts by volume.

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PUM

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Abstract

The separator for the accumulator is composed of the polyvinyl chloride, the deposition silicon dioxide, the additive, the bond and the pore-forming agent according to certain proportioning. The deposition silicon dioxide enhances the wettability and the affinity between the separator and the colloid. The organic solvent as the bond merges and glues the polymer, forming the pieces. The low temp amalgamation makes the separator possess the favorable anti-oxidation and aging resistance. The micropores and the cavities left extracted and volatilized by the solvent under the action of the pore-forming agent constitutes the pores in the separator. The structure of many circuitous pores decides that the separator possesses the minor of the maximum diameter of hole and the highter porosity and the good performance for storing the electrolyte.

Description

technical field [0001] The invention relates to a storage battery separator and a manufacturing method thereof. Background technique [0002] At present, most of the separators used in colloidal batteries in China are sintered PVC separators. PVC separators are made of pure polyvinyl chloride. The molding method adopts high-temperature sintering. The pores are formed by the gaps between PVC particles. The lower porosity limits the storage space of the electrolyte, and the separator is poor in oxidation resistance and aging resistance. At the same time, it is made of pure PVC, and its affinity with the colloid is not ideal. The scope is not wide. Contents of the invention [0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a battery separator based on PVC separators. The innovation point is that precipitated silica (SiO2) is added to the raw materials to enhance the wettability and affinity between the separator and the colloi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/16
CPCY02E60/10
Inventor 吴才新袁天佑
Owner JIANGSU SANHUAN IND HLDG CO LTD
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