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Composite phase-change material for power battery pack thermal management and preparation method of composite phase-change material

A composite phase change material, power battery technology, applied in heat exchange materials, secondary batteries, chemical instruments and methods, etc., can solve the problems of system complexity, limitation, battery pack heat loss, etc. Broad market prospects, the effect of high latent heat of phase transition

Inactive Publication Date: 2017-11-07
LVCHI AUTO TECH SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of society and the improvement of people's living standards, automobiles have become an essential means of transportation in people's lives, especially in recent years, the continuous development of hybrid electric vehicles has been continuously applied and developed, and the main power source of electric vehicles It is a battery pack system. The power battery pack is composed of multiple battery cells connected in series and parallel. When charging and discharging the battery pack, multiple single cells connected in series are closely connected together. Therefore, It is not conducive to the heat loss of the battery pack, causing the temperature of the battery pack system to rise rapidly. If timely thermal control and effective heat dissipation cannot be carried out, it will directly affect the service life of the battery pack, and thus cannot guarantee the operation of the electric vehicle
And if the battery pack is at a very low temperature, it is not conducive to the charging and discharging of the battery, causing the battery pack to fail to work normally. Therefore, effective thermal management and control of the battery pack system is the key to prolonging the service life of the battery pack.
[0003] At present, there are two main heat dissipation methods for battery packs: air cooling and liquid cooling. Although air cooling is cheap, it is not widely used due to its poor cooling effect. Liquid cooling is effective, but due to the complexity of the system and the system itself. There are many potential dangers that limit the use of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A composite phase change material for thermal management of power battery packs, made of the following raw materials in parts by weight: 75 parts of polyethylene glycol, 12 parts of trishydroxymethylaminomethane, 4 parts of polymethyl methacrylate, 2 parts of alkyl glucoside, 21 parts of pyrolytic graphite, 15 parts of boron nitride, and 17 parts of silicon carbide.

[0027] In this embodiment, the preparation method of the composite phase change material used for the thermal management of the power battery pack is as follows:

[0028] 1) Weigh the alkyl glucoside, add 6 times the weight of water, stir and mix evenly, and obtain the first mixed solution;

[0029] 2) Weighing boron nitride and silicon carbide, putting them into a ball mill, using the first mixed liquid as the ball milling liquid, and ball milling and mixing for 2 hours to obtain the first mixture, wherein the evaporation treatment is reduced-pressure evaporation treatment;

[0030] 3) Evaporate the firs...

Embodiment 2

[0037] A composite phase change material for thermal management of power battery packs, made of the following raw materials in parts by weight: 76 parts of polyethylene glycol, 13 parts of trishydroxymethylaminomethane, 7 parts of polymethyl methacrylate, 4 parts of alkyl glucoside, 22 parts of pyrolytic graphite, 17 parts of boron nitride, and 18 parts of silicon carbide.

[0038] In this embodiment, the preparation method of the composite phase change material used for the thermal management of the power battery pack is as follows:

[0039] 1) Weigh the alkyl glucoside, add 6 times the weight of water, stir and mix evenly, and obtain the first mixed solution;

[0040] 2) Weighing boron nitride and silicon carbide, putting them into a ball mill, using the first mixed liquid as the ball milling liquid, and ball milling and mixing for 2.5 hours to obtain the first mixture, wherein the evaporation treatment is reduced pressure evaporation treatment;

[0041] 3) Evaporate the fi...

Embodiment 3

[0048] A composite phase change material for thermal management of power battery packs, made of the following raw materials in parts by weight: 78 parts of polyethylene glycol, 14 parts of trishydroxymethylaminomethane, 6 parts of polymethyl methacrylate, 3 parts of alkyl glucoside, 23 parts of pyrolytic graphite, 17 parts of boron nitride, and 19 parts of silicon carbide.

[0049] In this embodiment, the preparation method of the composite phase change material used for the thermal management of the power battery pack is as follows:

[0050] 1) Weigh the alkyl glucoside, add 7 times the weight of water, stir and mix evenly, and obtain the first mixed solution;

[0051] 2) Weighing boron nitride and silicon carbide, putting them into a ball mill, using the first mixed liquid as the ball milling liquid, and ball milling and mixing for 2.5 hours to obtain the first mixture, wherein the evaporation treatment is reduced pressure evaporation treatment;

[0052] 3) Evaporate the fi...

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Abstract

The invention discloses a composite phase-change material for power battery pack thermal management. The composite phase-change material is prepared from the following raw materials in parts by weight: 75 to 80 parts of polyethylene glycol, 12 to 16 parts of trihydroxymethyl aminomethane, 4 to 8 parts of polymethyl methacrylate, 2 to 5 parts of alkyl glycoside, 21 to 25 parts of pyrolytic graphite, 15 to 18 parts of boron nitride and 17 to 20 parts of silicon carbide. The invention also discloses a preparation method of the composite phase-change material for the power battery pack thermal management. The composite phase-change material for the power battery pack thermal management, prepared by the invention, has higher phase-change latent heat, stress generated to a sealing device during a phase change process is lower, the sealing is easy, the safety is high, and the composite phase-change material can be suitable for the power battery pack thermal management.

Description

technical field [0001] The invention relates to the technical field of phase change materials, in particular to a composite phase change material used for thermal management of power battery packs and a preparation method thereof. Background technique [0002] With the continuous development of society and the improvement of people's living standards, automobiles have become an essential means of transportation in people's lives, especially in recent years, the continuous development of hybrid electric vehicles has been continuously applied and developed, and the main power source of electric vehicles It is a battery pack system. The power battery pack is composed of multiple battery cells connected in series and parallel. When charging and discharging the battery pack, multiple single cells connected in series are closely connected together. Therefore, It is not conducive to the heat loss of the battery pack, causing the temperature of the battery pack system to rise rapidl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06H01M10/613H01M10/659C08L71/02C08L33/12C08K13/02C08K3/38C08K3/34C08K3/04
CPCC08K2003/382C08L71/02C09K5/063H01M10/613H01M10/659C08L33/12C08K13/02C08K3/38C08K3/34C08K3/04Y02E60/10
Inventor 程三岗李宝玉
Owner LVCHI AUTO TECH SHANGHAI CO LTD