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A kind of acrylate adhesive for power battery packaging

An acrylic adhesive and power battery technology, which is applied in the direction of adhesives, polymer adhesive additives, adhesive additives, etc., can solve problems such as use hazards, changes in battery structure, and reduced battery safety and reliability, and prevent excessive volume changes. The effect of large, uniform internal structure

Active Publication Date: 2020-09-08
湖北回天新材料(宜城)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing acrylate glue will release a lot of heat when used, resulting in a large number of pores on the surface of the glue layer, and the volume will expand. There will be a lot of pores and ripples inside the packaged battery. When the temperature changes, the internal structure of the battery will change, which will reduce the safety and reliability of the battery and make it more dangerous to use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 80 g tetrahydrofuryl methacrylate, 10 g methyl methacrylate, 10 g chlorosulfonated polyethylene, 2 g trimethylol methacrylate, 1 g stabilizer, 10 g cumene hydroperoxide and 4 g fumed silica Mix well to get the oxidizing agent.

[0034] 80g tetrahydrofuryl methacrylate, 10g methyl methacrylate, 10gSBS, 2g thiourea, 1gN,N-dihydroxyethyl-p-toluidine, 2g methacrylic acid, 1g stabilizer, 4g fumed silica and 2g disinfectant The foaming agent is mixed evenly to obtain the reducing agent.

[0035] Mix 20ml of oxidizing agent with 10ml of reducing agent to obtain acrylate glue.

[0036] In this embodiment, the stabilizing agent is a mixture of hydroquinone, naphthoquinone, 2,6-di-tert-butyl-p-(dimethylaminomethyl)phenol and EDTA tetrasodium salt with a mass ratio of 1:2:5:7 , The thiourea is selected from tetramethylthiourea, and the defoamer is selected from a mixture of polydimethylsiloxane and polyoxypropylene glyceryl ether with a mass ratio of 1:1.

[0037] During the te...

Embodiment 2

[0039] 150 g tetrahydrofuryl methacrylate, 18 g methyl methacrylate, 21 g chlorosulfonated polyethylene, 10 g trimethylol methacrylate, 6 g stabilizer, 20 g cumene hydroperoxide and 9 g fumed silica Mix well to get the oxidizing agent.

[0040] 150g tetrahydrofuryl methacrylate, 20g methyl methacrylate, 19gSBS, 8g thiourea, 3gN,N-dihydroxyethyl-p-toluidine, 9g methacrylic acid, 3.5g stabilizer, 9g fumed silica and 5g The defoamer is mixed evenly to obtain the reducing agent.

[0041] Mix 100ml of oxidizing agent with 50ml of reducing agent to obtain acrylate glue.

[0042] In this embodiment, the mass ratio of 1:3 for the stabilizer is a mixture of hydroquinone and 2,6-di-tert-butyl-p-(dimethylaminomethyl)phenol, and the thiourea is the tetramethylmethanol with a mass ratio of 1:2. The mixture of base thiourea and ethylene thiourea, the defoamer is polydimethylsiloxane.

[0043] During the test at room temperature (20-25°C, 23°C in this example), copper or aluminum alloy sh...

Embodiment 3

[0045] 60 g tetrahydrofuryl methacrylate, 10 g methyl methacrylate, 10 g chlorosulfonated polyethylene, 5 g trimethylol methacrylate, 3 g stabilizer, 8 g cumene hydroperoxide and 4 g fumed silica Mix well to get the oxidizing agent.

[0046] 60g tetrahydrofuryl methacrylate, 10g methyl methacrylate, 10gSBS, 4g thiourea, 3gN,N-dihydroxyethyl p-toluidine, 6g methacrylic acid, 2g stabilizer, 4g fumed silica and 1g disinfectant The foaming agent is mixed evenly to obtain the reducing agent.

[0047] Mix 10ml of oxidizing agent with 30ml of reducing agent to obtain acrylate glue.

[0048] In this embodiment, the stabilizer is a mixture of hydroquinone and naphthoquinone with a mass ratio of 1:6, the thiourea is ethylenethiourea, and the defoamer is polyoxypropylene glyceryl ether.

[0049] During the test at room temperature (20-25°C, 23°C in this example), using a copper sheet or an aluminum alloy sheet as a test piece, the viscosity of the acrylic glue was measured to be 4600CP...

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Abstract

The invention discloses an acrylic ester adhesive for power battery encapsulation and relates to the field of acrylic ester structural adhesives. The acrylic ester adhesive comprises 1 part of an oxidizing agent and 0.5 to 3 parts of a reducing agent, wherein the oxidizing agent comprises 40 to 60 parts of tetrahydrofurfuryl methacrylate, 5 to 10 parts of methyl methacrylate, 5 to 10 parts of chlorosulfonated polyethylene, 1 to 5 parts of trimethylolpropyltriacrylate, 0.5 to 3 parts of a stabilizing agent, 5 to 8 parts of isopropyl benzene hydroperoxide and 2 to 4 parts of fumed silica; and the reducing agent comprises 40 to 60 parts of tetrahydrofurfuryl methacrylate, 5 to 10 parts of methyl methacrylate, 5 to 10 parts of SBS, 1 to 4 parts of thiourea, 0.5 to 3 parts of N,N-dihydroxyethyl-p-toluidine, 1 to 6 parts of methacrylic acid, 0.5 to 2 parts of a stabilizing agent, 2 to 4 parts of fumed silica and 1 to 3 parts of a defoaming agent. The acrylic ester adhesive for power battery encapsulation is low in heat release during use, the internal structure of the adhesive after encapsulation molding is uniformly, air holes and ripple are avoided, and the safe reliability of the battery can be improved.

Description

technical field [0001] The invention relates to the field of acrylic structural adhesives, in particular to an acrylic adhesive used for power battery packaging. Background technique [0002] The power battery is a power source that provides power for electric vehicles, electric trains, electric bicycles, golf carts, etc. Because it needs to provide a large amount of electric energy, the power battery not only needs to have higher energy and power, but also needs to have higher energy density and safety reliability. [0003] Most of the current power batteries use acrylic glue to bond and pot the copper wire between the positive and negative electrodes of the battery and the aluminum row. Because the power battery is usually large in size, the depth of potting needs to be deep, and the amount of glue used in a single time is relatively large. Many, because electric vehicles, electric trains, electric bicycles, and golf carts will vibrate during driving, and the temperature ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J4/02C09J4/06C09J11/06C09J11/04C09J11/08
CPCC09J4/06C09J11/04C09J11/06C09J11/08
Inventor 刘苏宇韩胜利张浩军章锋吴正明
Owner 湖北回天新材料(宜城)有限公司
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