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Heat-conducting phase-change gel material, preparation method thereof and battery module

A technology of gel materials and phase change materials, applied in the field of thermal conductive materials, can solve problems such as battery structure damage, battery overcharge or overdischarge, safety problems, etc., to improve heat transfer efficiency, improve thermal conductivity, and good temperature uniformity. Effect

Pending Publication Date: 2022-01-21
GUANGDONG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

2. Uniform temperature: The temperature difference in the same battery pack should not exceed 5°C, otherwise it will lead to inconsistent charging and discharging levels of each battery, which may cause individual batteries to be overcharged or overdischarged, resulting in damage to the internal structure of the battery and causing safety problems
However, the current thermally conductive phase change materials are mostly hard solids, which cannot well match the complex gap between the battery pack and the liquid cooling system.

Method used

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  • Heat-conducting phase-change gel material, preparation method thereof and battery module
  • Heat-conducting phase-change gel material, preparation method thereof and battery module
  • Heat-conducting phase-change gel material, preparation method thereof and battery module

Examples

Experimental program
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Effect test

Embodiment 1

[0039] This example is the preparation of thermally conductive phase change gel, calculated in parts by mass, and the specific preparation steps are as follows:

[0040] Fully mix 40 parts of vinyl siloxane, 10 parts of terminal hydrogen siloxane and 0.001 part of ethynyl cyclohexanol; add 40 parts of paraffin and 10 parts of boron nitride, stir to make it fully mixed, and use a planetary mixer under vacuum Stir (stirring speed is 100 rpm, time is 4 hours), then add 0.004 parts of chloroplatinic acid and continue to stir evenly, and cure at room temperature to obtain a thermally conductive phase-change gel.

[0041] figure 1 It is a scanning electron micrograph of the thermally conductive phase-change gel prepared in Example 1 of the present invention. From figure 1 It can be seen that the thermally conductive filler and paraffin particles are evenly dispersed in the thermally conductive phase change gel, and the presence of paraffin particles makes the thermally conductive ...

Embodiment 2

[0043] This example is the preparation of thermally conductive phase change gel, calculated in parts by mass, and the specific preparation steps are as follows:

[0044] Fully mix 40 parts of vinyl siloxane, 10 parts of terminal hydrogen siloxane and 0.001 part of ethynyl cyclohexanol; add 40 parts of organic silicon wax and 10 parts of boron nitride, stir to make it fully mixed, and use a planetary mixer to Stir under vacuum (stirring rate is 100 rpm, time is 4 hours), then add 0.008 part of chloroplatinic acid and continue to stir evenly, and cure at room temperature to obtain a thermally conductive phase-change gel.

Embodiment 3

[0046]This example is the preparation of thermally conductive phase change gel, calculated in parts by mass, and the specific preparation steps are as follows:

[0047] Fully mix 50 parts of α, ω-dihydroxy polysiloxane with 0.001 part of trace ethynyl cyclohexanol; add 40 parts of paraffin and 10 parts of boron nitride, stir to make it fully mixed, and stir under vacuum with a planetary mixer ( The stirring speed is 100 rpm, and the time is 4 hours), and then 0.005 parts of lithium hydroxide is added to continue to stir evenly, and it is cured at room temperature to obtain a thermally conductive phase-change gel.

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Abstract

The invention relates to the field of heat-conducting materials, in particular to a heat-conducting phase-change gel material, a preparation method thereof and a battery module. According to the heat-conducting phase-change gel disclosed by the invention, a phase-change material is fixed in a three-dimensional cross-linked network of organic silicon, so that the phase-change material cannot be separated out even if the phase-change material is heated to be in a liquid state. The heat-conducting phase-change gel has certain elasticity after being cured at room temperature, and has protection and cushioning effects. The heat-conducting phase-change gel has heat-conducting and phase-change properties, and the heat-conducting filler is 'extruded' more tightly by adding the phase-change material under the condition that the same mass fraction of the heat-conducting filler is packed, so that more heat-conducting passages are formed, and the heat-conducting property is improved. The heat-conducting phase-change gel can flow before crosslinking and curing and can be cured at room temperature, so that the heat-conducting phase-change gel can be used as an interface material, can easily fill a gap between a liquid cooling pipeline and the outer wall of a battery, can improve the heat transfer efficiency, can exert the characteristic of good temperature uniformity of a phase-change material, and can cooperate with a liquid cooling system to provide heat management of the battery.

Description

technical field [0001] The invention relates to the field of thermally conductive materials, in particular to a thermally conductive phase-change gel material, a preparation method thereof, and a battery module. Background technique [0002] Electric vehicles still have many problems to be solved. From the point of view of the battery pack, battery life and safety are the two issues that attract the most attention in electric vehicles. Both of these issues are sensitive to temperature. [0003] Among them, one of the reasons affecting the battery life is the operating temperature. 1. (Add) heat dissipation: The battery charge and discharge capacity will decrease at low temperature, energy and power loss, and the capacity is even 10% of that at room temperature; at the same time, a lot of heat will be generated when the battery is charged and discharged, and the best working temperature of the battery is 20 ~55°C. When the battery heats up, the heat needs to be conducted ...

Claims

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Application Information

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IPC IPC(8): C09K5/06C09K5/14H01M10/613H01M10/625H01M10/6556H01M10/6568H01M10/659
CPCC09K5/063C09K5/14H01M10/613H01M10/625H01M10/6556H01M10/6568H01M10/659Y02E60/10
Inventor 葛鑫黎灿兵李新喜张江云张国庆
Owner GUANGDONG UNIV OF TECH
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