Preparation method of high-thermal-conductivity flexible phase-change material and battery module

A phase change material and battery module technology, which is applied in heat exchange materials, battery pack components, secondary batteries, etc., can solve the problems of easy leakage, poor thermal conductivity and brittleness of phase change materials, and improve The effect of flexibility and toughness, improving anti-leakage performance and latent heat value, and improving the degree of densification

Inactive Publication Date: 2020-09-01
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] This application provides a method for preparing a highly thermally conductive flexible phase change material and a battery

Method used

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  • Preparation method of high-thermal-conductivity flexible phase-change material and battery module
  • Preparation method of high-thermal-conductivity flexible phase-change material and battery module
  • Preparation method of high-thermal-conductivity flexible phase-change material and battery module

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Embodiment 1

[0030] This embodiment 1 provides a method for preparing a highly thermally conductive flexible phase change material and the prepared flexible phase change material:

[0031] The raw materials include styrene-butadiene-styrene block copolymer, paraffin wax and thermal conductivity enhancer, and the preparation steps are as follows:

[0032] Step 1: Soak the styrene-butadiene-styrene block copolymer in an organic solvent for 2-3 hours. The mass ratio of the styrene-butadiene-styrene block copolymer to the organic solvent is 5: 5-7, during soaking, stirring until forming a colloidal solution of styrene-butadiene-styrene block copolymer;

[0033] Step 2: Dissolve the paraffin in an oil bath at a temperature of 60°C. When the paraffin is completely dissolved, add a thermal conduction enhancer. The mass ratio of paraffin to the thermal conduction enhancer is 5-8:0.7-1.2, at 1000rad / Stir at a speed of s. After stirring evenly, pour it into a mold for curing to obtain a composite ...

Embodiment 2

[0042] Embodiment 2 illustrates the preparation process of a highly thermally conductive flexible phase change material in combination with the specific components of the raw materials, as follows:

[0043] Step 1: Place 15g of styrene-butadiene-styrene block copolymer in 20g of carbon tetrachloride solution and soak for 2-3 hours. During the soaking, stir until forming styrene-butadiene-benzene Colloidal solution of ethylene block copolymer;

[0044] Step 2: Dissolve 32g of paraffin in an oil bath at a temperature of 60°C. When the paraffin is completely dissolved, add 3g of expanded graphite and stir at a speed of 1000rad / s. After stirring evenly, pour it into the mold Carry out curing to obtain the composite phase-change material of 35g;

[0045] It should be noted that the thermal conductivity enhancer is expanded graphite, which can not only effectively improve the thermal conductivity of the phase change material, but also have a certain adsorption effect on paraffin, a...

Embodiment 3

[0048] Embodiment 3 provides a battery module, refer to Figure 2-Figure 4 , this embodiment applies the high thermal conductivity flexible phase change material prepared by the method for preparing the high thermal conductivity flexible phase change material in the above embodiment, which includes a box body 6 and a battery rack 4; several batteries 3 are arranged in the box body 6; The battery frame 4 is made of a flexible phase-change material. The battery frame 4 is provided with a loading hole adapted to the structure of the battery 3, and the battery 3 is inserted into the loading hole.

[0049] It can be understood that in this embodiment, the battery frame 4 is provided and the loading hole is opened on the battery frame 4 to insert the battery 3, so that the battery 3 can be in contact with the flexible phase change material, and the structure of the battery frame 4 is more stable. It can provide a shock absorption effect for the battery 3, and can effectively ensure ...

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Abstract

The invention discloses a preparation method of a high-thermal-conductivity flexible phase change material and a battery module. The preparation method of the high-thermal-conductivity flexible phasechange material comprises the following steps: putting a styrene-butadiene-styrene block copolymer into an organic solvent to be sufficiently dissolved into a gel; then mixing paraffin and a heat conduction enhancer, grinding into powder, and fully stirring and mixing with the colloidal styrene-butadiene-styrene block copolymer. The traditional melt blending process is omitted; therefore, the separation phenomenon of two materials is avoided; the adopted organic solvent is easy to volatilize, so that a compact reticular film is formed on the surface of the phase-change material, the coating compactness of the composite phase-change material powder is effectively improved, the flexibility and toughness of the phase-change material are improved, the leakage resistance and latent heat value are improved, and the heat-conducting property of the phase-change material can be improved by adding the heat conduction enhancer .

Description

technical field [0001] The present application relates to the technical field of phase change materials, in particular to a method for preparing a flexible phase change material and a battery module using the phase change material. Background technique [0002] In recent years, the problems of energy shortage, environmental pollution and excessive emission of greenhouse gases have attracted more and more attention. The development of sustainable and clean energy has become a key development object. Automobiles are one of the parts that consume the most fossil energy, accompany people's daily life and are also one of the important sources of greenhouse gas emissions. Therefore, pure electric vehicles driven by electricity have no greenhouse gas emissions and can reduce the consumption of fossil energy, which is a key focus area of ​​sustainable development. As the energy core of pure electric vehicles, power batteries are extremely vulnerable to damage or even explosion due...

Claims

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Application Information

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IPC IPC(8): C09K5/06H01M2/10H01M10/613H01M10/625H01M10/653H01M50/204
CPCC09K5/063H01M10/613H01M10/625H01M10/653Y02E60/10
Inventor 黄启秋李新喜张国庆饶中浩邓坚周德全
Owner GUANGDONG UNIV OF TECH
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