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A power lithium battery temperature equalization heat dissipation system composed of graphene thermal conductive film

A technology of ene heat conduction film and heat dissipation system, which is applied in the field of uniform temperature heat dissipation system for power lithium batteries, can solve the problem of insufficient heat dissipation effect of copper-based graphene composite heat dissipation film, and achieve improved heat dissipation effect, improved heat dissipation performance, and strengthened combination Effect

Active Publication Date: 2021-02-05
ZHEJIANG LUYUAN ELECTRIC VEHICLE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat dissipation effect of this ordinary copper-based graphene composite heat dissipation film is not good enough

Method used

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  • A power lithium battery temperature equalization heat dissipation system composed of graphene thermal conductive film

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Effect test

Embodiment 1

[0032] A power lithium battery uniform temperature cooling system composed of graphene thermal conductive film, including lithium battery body and copper-based graphene nano-chip composite thermal conductive film coated on the lithium battery body, copper-based graphene nano-micro-chip composite thermal conductive film From the inside to the outside, it includes the copper foil base layer and the graphene nano-chip heat conduction layer.

[0033] In this embodiment, in terms of parts by mass, the heat conduction layer of graphene nanoplatelets includes 8 parts of copper naphthenate, 50 parts of edge graphene oxide nanoplatelets, 3 parts of dispersant and 1 part of auxiliary agent. Wherein, dispersant selects calcium stearate for use. The additives include 0.5 part of silicone resin and 0.5 part of tetraerythritol ester.

[0034] Edge graphene oxide nanoplatelets are prepared by the following steps:

[0035] a. Using natural graphite flakes as raw materials, steel needles as ...

Embodiment 2

[0045]In this embodiment, in terms of parts by mass, the heat conduction layer of graphene nanoplatelets includes 7 parts of copper naphthenate, 45 parts of edge graphene oxide nanoplatelets, 1 part of dispersant and 0.5 part of auxiliary agent. Wherein, the dispersant selects bis stearic acid amide for use. The auxiliary agent includes 0.5 parts of silicone resin.

[0046] Edge graphene oxide nanoplatelets are prepared by the following steps:

[0047] a. Using natural graphite flakes as raw materials, steel needles as grinding bodies, needle-to-material mass ratio 40:1, hydrogen peroxide as grinding media, and grinding for 8 hours at a magnetic field switching frequency of 2000r / min to obtain graphene nanosheets.

[0048] b. Mix concentrated sulfuric acid and graphene nanoplatelets at a ratio of 20mL: 1g, and cool in an ice-salt bath to below 0°C.

[0049] c. Add potassium permanganate whose mass is 2.5 times that of graphene nanoplatelets, heat up the system to 30°C, stir ...

Embodiment 3

[0057] In this embodiment, in terms of parts by mass, the graphene nanoplatelet heat conduction layer includes 10 parts of copper naphthenate, 55 parts of edge graphene oxide nanoplatelets, 4 parts of dispersant and 2 parts of auxiliary agent. Wherein, the dispersing agent is selected from the equal proportion mixture of calcium stearate and bis stearic acid amide. The additives include 1.5 parts of silicone resin and 0.5 parts of tetraerythritol ester.

[0058] Edge graphene oxide nanoplatelets are prepared by the following steps:

[0059] a. Using natural flake graphite as raw material, steel needles as grinding body, needle-to-material mass ratio 60:1, hydrogen peroxide as grinding medium, and grinding for 10 hours at a magnetic field switching frequency of 2500r / min to obtain graphene nanosheets.

[0060] b. Mix concentrated sulfuric acid and graphene nanoplatelets at a ratio of 30mL: 1g, and cool in an ice-salt bath to below 0°C.

[0061] c. Add potassium permanganate w...

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Abstract

The invention relates to the technical field of heat dissipation of electric vehicle batteries, in particular to a power lithium battery uniform temperature heat dissipation system composed of a graphene heat conduction film. It includes a lithium battery body and a copper-based graphene nano-chip composite heat-conducting film coated on the lithium-ion battery body. The copper-based graphene nano-chip composite heat-conducting film includes a copper foil base layer and a graphene nano-chip in turn from the inside to the outside. Thermal conduction layer; according to parts by mass, the graphene nanoplatelet heat conduction layer uses copper naphthenate and edge graphene oxide nanoplatelets as the main components of the graphene nanoplatelet heat conduction layer, through the edge graphene oxide nanoplatelet The conjugation between the aromatic layer and copper naphthenate constructs a graphene oxide-copper matrix composite material with a three-dimensional porous structure, which effectively improves the heat dissipation performance through the porous structure.

Description

technical field [0001] The invention relates to the technical field of heat dissipation of electric vehicle batteries, in particular to a power lithium battery uniform temperature heat dissipation system composed of a graphene heat conduction film. Background technique [0002] With the increasingly serious environmental pollution, people's awareness of environmental protection is constantly improving, low-carbon and green have gradually become the mainstream of life, and two-wheeled electric vehicles have become an important travel tool for people because of their lightness and labor-saving. A car driven by electricity and powered by electricity. Because all the driving energy comes from the supply of the battery, if the heat dissipation performance of the battery is poor, it will affect the battery life and work efficiency. [0003] The patent document with the application number CN201621455172.9 discloses such a battery with a copper-based graphene composite heat dissipa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/613H01M10/625H01M10/653H01M10/654
CPCH01M10/613H01M10/625H01M10/653H01M10/654Y02E60/10
Inventor 倪捷陈文胜张芳勇陶兴华冯岩
Owner ZHEJIANG LUYUAN ELECTRIC VEHICLE
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