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High-damp-heat-resistance heat-conducting structural adhesive for power battery bonding, preparation and application

A heat-conducting structure and power battery technology, applied in the direction of adhesives, epoxy resin glue, adhesive types, etc., can solve problems such as reduced bonding performance, achieve low elastic modulus, avoid agglomeration, meet heat dissipation and bonding fixation Effect

Pending Publication Date: 2021-05-11
JONES TECH +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because in hot and humid environments, especially PET materials that are easy to absorb moisture, and the adhesive layer is prone to interface delamination, resulting in a sharp drop in adhesive performance, which has become an important constraint that limits the application of thermally conductive structural adhesives in the field of power battery bonding. factor
However, most of the current technologies in the industry are limited to the research on the initial performance before moisture and heat aging, or the research on the moisture and heat resistance of non-thermally conductive functional structural adhesives without adding a large amount of thermally conductive powder.

Method used

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  • High-damp-heat-resistance heat-conducting structural adhesive for power battery bonding, preparation and application
  • High-damp-heat-resistance heat-conducting structural adhesive for power battery bonding, preparation and application
  • High-damp-heat-resistance heat-conducting structural adhesive for power battery bonding, preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The processing steps are:

[0053] The first step: powder treatment, 1g of coupling agent is made into alcohol solution and added to the surface of 100g of heat-conducting powder, reacted at 85°C and then dried at 100°C.

[0054] Step 2: Add the materials in the formula to the planetary disperser one by one, stir and mix for 60 minutes at a stirring paddle speed of 50-150 r / min, and continue stirring for 60 minutes under vacuum to obtain the A and B components of the structural adhesive.

[0055] Step 3: Mix the obtained AB components with a static mixer, and test the properties after curing at room temperature for 7 days.

[0056] Component ratio table in embodiment 1

[0057]

Embodiment 2

[0059] With reference to the technique in embodiment 1, the adjustment component proportioning table is

[0060]

[0061] The test data sheet of embodiment 1 and embodiment 2

[0062]

[0063] Based on the content of the present invention and the content in the embodiment, the present invention has the following beneficial effects:

[0064] 1. By matching a specific compound amine cross-linking agent with a flexible modified epoxy resin, the cross-linking point structure with a long and smooth long molecular chain structure and short molecular chain concentration is controlled, and the polymer network structure Forming a microscopic phase separation, that is, a two-phase network structure between dense phase and loose phase, which overcomes the decrease in water absorption and heat resistance caused by the excessive free volume in the polymer network of the adhesive itself, and helps to reduce the hardness and elastic modulus of the cured product. At the same time, it i...

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Abstract

The invention relates to the technical field of adhesives, in particular to a high-damp-heat-resistance heat-conducting structural adhesive for power battery bonding, which comprises a component A and a component B mixed according to a volume ratio, wherein the component A comprises 5-50 parts of modified epoxy resin, 5-50 parts of liquid epoxy resin containing a reactive diluent, 5-100 parts of heat-conducting powder subjected to surface treatment by a specific coupling agent, 0.1-5 parts of a flame retardant, 0.1-5 parts of an anti-settling agent and 0.1-5 parts of a coupling agent; and the component B comprises 1-50 parts of an amine curing agent, 1-50 parts of a catalyst, 0.1-5 parts of a coupling agent, 0.1-5 parts of an anti-settling agent, 0.1-5 parts of a flame retardant and 5-100 parts of heat-conducting powder subjected to surface treatment by a specific coupling agent. The structural adhesive has the advantages of low elastic modulus, high heat conductivity, high adhesion, high flame retardance and high heat and damp resistance.

Description

technical field [0001] The invention relates to the technical field of adhesives, and specifically relates to a high-moisture-resistant and heat-conducting structural adhesive used for bonding power batteries. Background technique [0002] With the development of economy and technology and the prominence of environmental protection issues, traditional gasoline-powered vehicles will gradually be replaced by new energy vehicles. The rapid development of the new energy vehicle industry promotes the development and improvement of related industries. The main energy source of power, among them, in terms of battery PACK structure adhesive, there is a high demand for heat dissipation and adhesive fixation, and it is necessary to be able to cope with harsh thermal stress environments with low elastic modulus, high thermal conductivity, high adhesion, high Flame retardant, high heat and humidity resistance material. [0003] For the bonding application of automotive power batteries,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J11/04C09J11/06C08G59/50
CPCC09J163/00C09J11/04C09J11/06C08G59/5006C08G59/504C08K2003/2227C08K2201/014C08K2201/003C08L2205/025C08L2201/02
Inventor 韩杨周占玉吴晓宁
Owner JONES TECH
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