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Manufacturing method of composite heat dissipation material

A technology of composite heat-dissipating material and manufacturing method, which is applied to electrochemical generators, electrical components, circuits, etc., can solve the problems of direct contact with cooling plates, reduced heat transfer efficiency, insufficient strength of thermally conductive materials, etc., to improve insulation reliability, The effect of efficient heat conduction

Inactive Publication Date: 2018-07-06
东莞优邦材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to vibration, thermal expansion and contraction, and displacement of the hard coating film on the surface of the battery, if the underlying thermal conductive material is not strong enough, there is a risk of wearing out the thermal conductive layer and directly contacting the cooling plate
If an insulating protective layer is firstly made on the surface of the cooling plate or cooling pipe, and then thermal conductive gel or gel-type thermal pad is made, the insulating layer will increase the thermal resistance and reduce the heat transfer efficiency

Method used

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  • Manufacturing method of composite heat dissipation material
  • Manufacturing method of composite heat dissipation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] First coat the surface of the cooling plate with a 0.5mm two-component additive silicone thermal conductive adhesive. The thermal conductive adhesive has the following main characteristics: A / B component mixed viscosity 20Pa.s, hardness after curing is 90, thermal conductivity is 1.6W / m.k, and volume resistivity is 5×10 14 Ω.cm, electric strength 16kV / mm, and aluminum bonding shear strength 3.2MPa.

[0057] The thermally conductive adhesive is coated and molded and cured at 100°C for 10 minutes.

[0058] Then coat the surface of the cured silicone thermal conductive adhesive with a 0.5mm two-component thermally conductive addition molding silicone gel. The thermally conductive silicone gel has the following main characteristics: the viscosity after A / B mixing is 18 Pa.s, and the hardness after curing is 10. The thermal conductivity is 1.6W / mk, and the volume resistivity is 2×10 14 Ω.cm, electric strength 14kV / mm.

[0059] The composite heat dissipation material coated with th...

Embodiment 2

[0061] First, coat the surface of the cooling plate with a 0.2mm one-component addition molding silicone thermal conductive adhesive. The thermal conductive adhesive has the following main characteristics: viscosity 30Pa.s, hardness after curing 92, thermal conductivity 2.5W / mk, volume resistivity 2 ×10 14 Ω.cm, electric strength 18kV / mm, and aluminum bonding shear strength 3.4MPa.

[0062] Then coat the surface of the uncured silicone thermal conductive adhesive with a 0.4mm two-component thermal conductive gel. The thermal conductive gel has the following main characteristics: the viscosity after A / B mixing is 25Pa.s, the hardness after curing is 15, and the thermal conductivity is 2.5 W / mk, volume resistivity 1×10 14 Ω.cm, electric strength 16kV / mm.

[0063] The composite heat dissipation material after coating the thermal gel is cured at a temperature of 150° C. for 20 minutes.

Embodiment 3

[0065] First, print a 0.5mm one-component dealcoholized silicone thermal conductive adhesive on the surface of the cooling plate. The thermal conductive adhesive has the following main characteristics: viscosity 40Pa.s, surface drying time 10 minutes, curing at room temperature, hardness after curing is 88, Thermal conductivity 2.8W / mk, volume resistivity 2×10 14 Ω.cm, electric strength 20kV / mm, and aluminum bonding shear strength 2.8MPa. This one-component dealcoholized silicone thermal conductive adhesive contains glass beads with a diameter of 0.2mm to ensure the thickness of the thermal conductive adhesive layer under subsequent pressure operations> 0.2mm.

[0066] Then, on the surface of the uncured one-component dealcoholized silicone thermal conductive adhesive, a flexible thermal pad with a thickness of 1mm is applied. The flexible thermal pad has the following main characteristics: hardness 10, thermal conductivity 2.6W / mk, volume resistivity 2×10 14 Ω.cm, electric stren...

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Abstract

The invention discloses a manufacturing method of a composite heat dissipation material. The manufacturing method specifically comprises the following steps: uniformly coating the surface of a coolingplate with a liquid first heat conducting layer of the first thickness; uniformly coating the first heat conducting layer with a soft second heat conducting layer; combining the cooling plate, the second heat conducting layer and the first second heat conducting layer into the composite heat dissipation material; curing the composite heat dissipation material. The manufacturing method disclosed by the invention has the benefits that the composite heat dissipation material is formed on the surface of the cooling plate by relying on the first high-hardness and high-mechanical strength wear-resistant first heat conducting layer and the second low-hardness flexible second heat conducting layer, the fixation, the wear resistance and the efficient heat conductivity of the composite heat dissipation material are realized, and the insulation reliability is improved.

Description

Technical field [0001] The present invention relates to the technical field of power battery assemblies, and in particular to a method for manufacturing a heat dissipation composite heat dissipation material in a new energy power battery assembly. Background technique [0002] Thermally conductive materials are widely used as auxiliary materials for the heat sink of electronic and electrical products. By filling between the heating device and the heat sink, the thermal resistance between the two is effectively reduced and heat is quickly transferred to the heat sink. Thermally conductive materials are mainly thermally conductive fillers, which are mixed with thermally conductive fillers, polymers, and additives to form products with a thermal conductivity of 0.2-10.0W / mk, usually in the form of thermally conductive grease, thermally conductive glue, thermally conductive gel, and thermally conductive gaskets. The product. It is used between heat generation and heat sink to assist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/625H01M10/653H01M10/655H01M10/6554
CPCH01M10/613H01M10/625H01M10/653H01M10/655H01M10/6554Y02E60/10
Inventor 刘良军夏忠王卫超王文菲杨静
Owner 东莞优邦材料科技股份有限公司
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