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Lithium battery special anti-warping adhesive and preparation method and anti-warping tab tape

A lithium battery and adhesive technology, which is applied in the manufacture of electrolyte batteries, adhesives, and adhesive additives, etc., can solve the problems of unwinding and degumming, large unwinding force, etc., and achieve the effect of improving the anti-lifting performance.

Active Publication Date: 2020-12-15
佛山市顺德区永创翔亿电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason for this is that the tab tape is not subjected to release treatment, and it is easy to have a large unwinding force, resulting in unwinding and degumming.

Method used

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  • Lithium battery special anti-warping adhesive and preparation method and anti-warping tab tape
  • Lithium battery special anti-warping adhesive and preparation method and anti-warping tab tape

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1, it is an adhesive with excellent anti-warping performance for lithium batteries, which is prepared by the following steps. In step 1, an adhesive with excellent anti-warping performance for lithium batteries is synthesized, and 40 parts of isooctyl acrylate ( EHA), 10 parts of lauryl acrylate (LA), 4 parts of itaconic acid, 3 parts of 4-methacryloxyethyl trimellitic anhydride (4-META), 5 parts of methyl acrylate (MMA) , 2 parts of tetrahydrofuran acrylate (THFA), 0.02 parts of free radical initiator azobisisobutyronitrile (AIBN), 0.2 parts of copper chloride, 0.3 parts of 2,2'-bipyridine and 100 parts of toluene After mixing, nitrogen deoxygenation was carried out for 90 minutes, the temperature was controlled at 75°C, and the reverse atom transfer radical polymerization (R-ARTP) polymerization reaction was carried out under the protection of nitrogen for 10 hours. The number average molecular weight (Mn) was controlled to 455100, and the molecular weight The...

Embodiment 2

[0025] Example 2, which is an adhesive with excellent anti-warping performance for lithium batteries, which is prepared by the following steps. In step 1, an adhesive with excellent anti-warping performance for lithium batteries is synthesized, and 30 parts of isooctyl acrylate ( EHA), 20 parts of lauryl acrylate (LA), 5 parts of itaconic acid, 5 parts of 4-methacryloxyethyl trimellitic anhydride (4-META), 8 parts of methyl acrylate (MMA) , 1 part of tetrahydrofuran acrylate (THFA), 0.04 part of free radical initiator azobisisobutyronitrile (AIBN), 0.2 part of copper chloride, 0.4 part of 2,2'-bipyridine and 80 parts of acetic acid After mixing the ethyl esters, deoxygenate with nitrogen for 50 minutes, control the temperature at 80°C, and carry out reverse atom transfer radical polymerization (R-ARTP) polymerization reaction under the protection of nitrogen for 8 hours, and the number average molecular weight (Mn) is controlled to 321500 , the molecular weight polydispersity ...

Embodiment 3

[0028] Embodiment 3, which is an adhesive with excellent anti-warping performance for lithium batteries, which is prepared by the following steps. Step 1 synthesizes an adhesive with excellent anti-warping properties for lithium batteries, and 40 parts of isooctyl acrylate ( EHA), 10 parts of lauryl acrylate (LA), 2 parts of itaconic acid, 4 parts of 4-methacryloxyethyl trimellitic anhydride (4-META), 5 parts of methyl acrylate (MMA) , 2 parts of tetrahydrofuran acrylate (THFA), 0.08 parts of free radical initiator azobisisobutyronitrile (AIBN), 0.1 part of copper chloride, 0.2 parts of 2,2'-bipyridine and 70 parts of acetic acid After mixing the ethyl esters, carry out nitrogen deoxygenation for 100 minutes, control the temperature at 75°C, and carry out the reverse atom transfer radical polymerization (R-ARTP) polymerization reaction under the protection of nitrogen for 20 hours, and the number average molecular weight (Mn) is controlled at 205200 , the molecular weight poly...

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Abstract

The invention relates to the field of lithium battery safety protection, in particular to a special anti-lifting adhesive for lithium batteries, a preparation method thereof, and an anti-lifting tab tape. A special anti-lifting adhesive for lithium batteries, comprising 10-50 parts of isooctyl acrylate, 1-30 parts of lauryl acrylate, 1-10 parts of itaconic acid, and 1-5 parts of 4-formazol Acryloyloxyethyl trimellitic anhydride, 1-10 parts of methyl acrylate, 1-5 parts of tetrahydrofuran acrylate, 0.001-0.5 parts of free radical initiator azobisisobutyronitrile, 0.001-1 part of chlorinated Copper, 0.01-2 parts of 2,2'-bipyridine, 50-150 parts of organic solvent, 1-10 parts of trimethylolpropane triglycidyl ether, 0.01-1 part of aluminum acetylacetonate and 0.1-1 parts of curing accelerator. The invention designs an inorganic and organic double hybrid cross-linking system, and the double cross-linking system greatly improves the cohesion of the adhesive layer and improves the anti-lifting performance of the tab adhesive tape.

Description

technical field [0001] The invention relates to the field of lithium battery safety protection, in particular to a special anti-lifting adhesive for lithium batteries, a preparation method thereof, and an anti-lifting tab tape. Background technique [0002] In the assembly and production process of lithium-ion batteries, special tapes are generally used to fix, insulate and protect the tabs of lithium-ion batteries. This special adhesive tape for lithium batteries usually uses polymer PI film as the base material, on which special glue is coated, with a thickness of 20-100 μm. Lithium battery special tape usually has good adhesion, no residual glue when the tape is removed, high temperature resistance, electrolyte resistance, and high electrical insulation. At present, acrylic acrylic glue is often used to coat PI film to prepare tab tape. Although the acrylic system tab tape shows good adhesion during the battery assembly process, during the winding process of the tab, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/08C09J11/06C09J7/25C09J7/30C08F220/18C08F220/14C08F222/02C08F220/28H01M10/058
CPCC08F220/18C09J11/06C09J133/08C09J2433/00C09J2479/086C09J7/25C09J7/30C08F220/1808C08F220/1812H01M10/058C08F220/281C08F220/282C08F222/02C08F220/14Y02E60/10Y02P70/50
Inventor 叶志斌曾丽娟
Owner 佛山市顺德区永创翔亿电子材料有限公司