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Graphene-based heat conducting piece

A graphene-based, heat-conducting sheet technology, applied in the direction of cooling/ventilation/heating transformation, layered products, etc., can solve the problems of battery performance stability degradation, power supply and equipment life reduction, combustion, etc., to eliminate temperature gradients, distribution Uniform, life-prolonging effect

Inactive Publication Date: 2015-04-15
WUXI GRAPHENE FILM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the heat emitted by the power supply and the heat of the heating plate are not transferred in time, local overheating will occur, resulting in a decrease in the stability of the battery performance, a reduction in the life of the power supply and equipment, and even serious dangers such as smoking, burning, and explosion. Happening

Method used

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  • Graphene-based heat conducting piece

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A Cu foil with a thickness of 15 microns was used as the growth substrate. After ultrasonic cleaning with deionized water, ethanol, acetone, and deionized water, it was dried at 60°C and placed in the heating center of the CVD furnace. Using methane as the carbon source and hydrogen as the auxiliary gas, the ratio of methane to hydrogen is 5:1, the growth temperature is 1000°C, the growth time is 30min, the cooling rate is 5min / °C, and the growth pressure is 5000Pa, the obtained graphene for one layer.

[0026] After the graphene-grown copper foil is flattened by a compression molding machine, epoxy resin AB glue is applied to the surface of the copper foil (as a heat-conducting substrate). The coating speed is 30m / min, and the thickness of the heat-conducting glue is 100 microns. Make two slices at the same time. Sprinkle carbon fiber evenly on the surface of one of the thermally conductive adhesives, the coverage of carbon fiber on the adhesive surface is 50%, and th...

Embodiment 2

[0028] The 25-micron copper foil was ultrasonically cleaned with deionized water, ethanol, acetone, and deionized water, and then dried at 60°C. Using nickel with a purity of 99.99% as the target, a layer of nickel is sputtered on the treated copper foil by magnetron sputtering, the sputtering current is 3A, the sputtering time is 30min, and the thickness of the sputtered nickel is 500nm about. Put the copper foil sputtered with a nickel layer into the heating center of a CVD tube furnace, use methane as the carbon source, hydrogen as the auxiliary gas, the ratio of methane and hydrogen is 1:1, the growth temperature is 1020°C, and the growth time is 30min , the temperature was lowered at a cooling rate of 5min / °C, the growth pressure was 10000Pa, and the obtained graphene had 5 layers.

[0029] After the graphene-grown copper foil is flattened by a compression molding machine, epoxy resin AB glue is applied to the surface of the copper foil through a coating machine. The coa...

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Abstract

The invention discloses a graphene-based heat conducting piece. The grapheme-based heat conducting piece comprises insulation layers, graphene layers, heat conducting substrates and heat conducting adhesive layers, wherein the heat conducting substrates, the graphene layers and the insulation layers are arranged on the two sides of the heat conducting adhesive layers in sequence from the interior to the exterior; carbon fibers are distributed in the heat conducting adhesive layers. According to the invention, the heat conducting piece is high in heat conductivity; heat can be distributed uniformly quickly; the heat conducting substrate provided with graphene thin films additionally are solider, and more anti-corrosion and oxidation-resistant, and prolongs service lives of power source and equipment; the grapheme-based heat conducting piece is small in size and occupied space, and suitable for heating and heat radiation of batteries which are arrayed in high density.

Description

technical field [0001] The invention belongs to the field of thermal management of power supplies, and in particular relates to a graphene-based heat conducting sheet. Background technique [0002] With the advancement of science and technology, electronic devices and equipment are developing in the direction of small size, light weight and compact structure. Car power batteries are no exception. The power battery, especially the lithium iron phosphate battery, is often assembled into a battery pack by connecting multiple battery blocks in series and parallel. There are gaps between the battery blocks for heating or heat dissipation, so that the car can be used no matter in a severe cold environment or a hot environment. Business as usual. However, if the heat emitted by the power supply and the heat of the heating plate are not transferred in time, local overheating will occur, resulting in a decrease in the stability of the battery performance, a reduction in the life of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K7/20B32B9/04
Inventor 金玲谭化兵刘海滨廖威
Owner WUXI GRAPHENE FILM
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