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Release film for battery and preparation method thereof

A release film and battery technology, applied in the field of film manufacturing, can solve the problems of low breakdown strength, high breakdown strength and high melting point, and achieve the effect of improving performance

Pending Publication Date: 2020-06-02
扬州万润光电科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polypropylene has a higher melting point than polyethylene and has a higher breakdown strength; while polyethylene has a lower melting point than polypropylene, but its breakdown strength is lower than polypropylene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method for battery release film, comprising the following steps:

[0025] Step 1) Prepare the base film layer: select the PET base film layer with a thickness of 5 microns;

[0026] Step 2) preparation of antistatic layer: choose 3.5 parts of ester-based quaternary ammonium salt type surfactants, 2 parts of conductive polyaniline, 3 parts of conductive titanium dioxide and 2 parts of polyvinyl chloride to form a mixed material, and then place Continuous heat treatment at 70°C for 30 minutes to form a mixture;

[0027] Step 3) Preparation of release layer: choose 10 parts of epoxy modified silicone resin, 9 parts of acrylate modified silicone resin, 1 part of reactive diluent, 3 parts of photoinitiator, 2 parts of antioxidant , 3 parts of defoamer, 2 parts of leveling agent and 1 part of coupling agent are added to the stirring container, heated to 50 ° C, stirred and mixed for a certain period of time in a constant temperature water bath, and a mixed solu...

Embodiment 2

[0035] A preparation method for battery release film, comprising the following steps:

[0036] Step 1) Prepare the base film layer: select the PP base film layer with a thickness of 80 microns;

[0037] Step 2) preparation of antistatic layer: choose 3.8 parts of ester-based quaternary ammonium salt type surfactants, 3.5 parts of conductive polyaniline, 4.5 parts of conductive titanium dioxide and 5 parts of polyvinyl chloride to form a mixed material, and then put Continuous heat treatment at 70°C for 30 minutes to form a mixture;

[0038] Step 3) Preparation of release layer: choose 12 parts of epoxy modified silicone resin, 12 parts of acrylate modified silicone resin, 2 parts of reactive diluent, 4 parts of photoinitiator, 3.5 parts of anti Add oxygen agent, 4.5 parts of defoaming agent, 4 parts of leveling agent and 2 parts of coupling agent into the stirring container, heat to 50°C, stir and mix in a constant temperature water bath for a certain period of time to obtain...

Embodiment 3

[0046] A preparation method for battery release film, comprising the following steps:

[0047] Step 1) Prepare the base film layer: select a non-woven base film layer with a thickness of 150 microns;

[0048] Step 2) preparation of antistatic layer: choose 4 parts of ester-based quaternary ammonium salt type surfactants, 5 parts of conductive polyaniline, 6 parts of conductive titanium dioxide and 7 parts of polyvinyl chloride to form a mixed material, and then put Continuous heat treatment at 70°C for 30 minutes to form a mixture;

[0049] Step 3) Preparation of release layer: choose 15 parts of epoxy modified silicone resin, 17 parts of acrylate modified silicone resin, 3 parts of reactive diluent, 5 parts of photoinitiator, 5 parts of anti Add oxygen agent, 7 parts of defoaming agent, 6 parts of leveling agent and 4 parts of coupling agent into the stirring container, heat to 50°C, stir and mix for a certain period of time in a constant temperature water bath to prepare a ...

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PUM

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Abstract

The present invention discloses a release film for battery and a preparation method thereof. The release film comprises a base film layer, an EVA pressure-sensitive layer and an anti-corrosion layer are sequentially arranged on the upper side of the base film layer from top to bottom, and an antistatic layer and a release layer are sequentially arranged on the lower side of the base film layer from top to bottom. The release film disclosed by the invention adopts a multi-layer composite structure, and the anti-corrosion layer and the antistatic layer are added on the base film layer, so that the performance of the release film is improved, and a battery is protected.

Description

technical field [0001] The invention relates to the technical field of membrane manufacturing, in particular to a release membrane for batteries and a preparation method thereof. Background technique [0002] A battery that is generally used as a power supply usually includes electrodes, an electrolyte, and a release film. The battery release film is located between the anode and cathode of the battery to isolate the two electrodes and prevent the two electrodes from directly contacting to cause a short circuit and cause an explosion. In addition, the release film can be used to accommodate electrolytes due to its microporous structure. [0003] The release film is generally used in lithium batteries in electronic devices (such as lithium ion or lithium secondary batteries). If the release film cannot completely isolate the anode and cathode, it will cause a short circuit of the electrodes and a violent exothermic reaction, which may cause the battery explode. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M2/14
CPCH01M50/403H01M50/449Y02E60/10
Inventor 李刚
Owner 扬州万润光电科技股份有限公司
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