Improved clapboard for accumulator and its preparation method

A battery and separator technology, applied to the battery separator and its manufacturing field, can solve the problems of unsatisfactory colloid affinity, limited application range of the separator, and limited electrolyte storage space.

Inactive Publication Date: 2003-05-07
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 betwee...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In Example 1, 38 parts of polyvinyl chloride, 55 parts of precipitated silica (including 3.85 parts of 325 mesh or more, 13.75 parts of 200-325 mesh, 29.15 parts of 100-200 mesh, 5.5 parts of 80-100 mesh, and 2.75 parts of 80 mesh) Parts), 3.3 parts of lead stearate, 3.5 parts of dioctyl ester, 0.2 parts of carbon black, and 65% sodium chloride and 10% dimethylformamide of the total weight of the above components are mixed uniformly, Press it into tablets at 60°C, then immerse the separator in water, leaching sodium chloride and dimethylformamide and drying.

Embodiment 2

[0033] In Example 2, 33 parts of polyvinyl chloride and 62 parts of precipitated silica (including 4.96 parts of 325 mesh or more, 13.64 parts of 200-325 mesh, 34.10 parts of 100-200 mesh, 8.06 parts of 80-100 mesh, and 1.24 parts of 80 mesh) Parts), 1 part of barium stearate, 3.7 parts of dibutyl ester, 0.3 part of carbon black combination, plus 60% ammonium carbonate and 8% dimethylformamide of the total weight of the above components, after uniformly mixing, Press it into a sheet at 85°C, and the ribs on one side of the partition are shaped into S, then the partition is immersed in water, and ammonia carbonate and dimethylformamide are dried and leached out.

Embodiment 3

[0034] Example 3, 35 parts of polyvinyl chloride, 60 parts of precipitated silica (including 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 for 80-100 mesh, 3.6 parts below 80 mesh), 2644.75 parts of antioxidant, 0.25 parts of carbon black combination, plus 52% sodium sulfate and 13% dimethylformate of the total weight of the above components After the amide is uniformly mixed, it is pressed at 70°C to form a tablet, one side rib of the partition is inclined, and then the partition is immersed in water to extract sodium sulfate and dimethylformamide for drying.

[0035] Note: The number of components in each embodiment refers to 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 separator for storage batteries and a manufacturing method thereof. Background technique [0002] At present, most of the separators used for colloidal batteries in China are sintered PVC separators. The PVC separators are made of pure polyvinyl chloride. The molding method adopts high-temperature sintering. The pores are formed by the gaps of PVC particles. The maximum pore size is relatively large. The lower porosity limits the storage space of the electrolyte, and the separator has poor oxidation resistance and aging resistance. At the same time, it is made of pure PVC, and its affinity with colloids is not ideal. The application of the separator The scope is not wide. Summary of the invention [0003] In order to overcome the above-mentioned shortcomings, the present invention provides an improved battery separator based on the PVC separator. The innovation lies in the addition of precipitated silica (SiO 2 ) In order to stre...

Claims

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Application Information

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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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