Combined heat dissipating device provided with fins and foam heat conduction structure

A technology of heat dissipation device and heat conduction structure, applied in electrochemical generators, electrical components, circuits, etc., can solve the problem of insufficient heat transfer effect enhancement, small effective contact area between foam metal and battery, and no reduction of contact interface air gap mechanism. and other problems, to achieve the effect of improving low thermal conductivity, reducing battery temperature rise, and overcoming large porosity

Active Publication Date: 2016-02-24
SHANGHAI MAKESENS ENERGY STORAGE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effective contact area between the metal foam and the battery in this patent is small, and there is no mechanism to reduce the air gap at the contact interface, resulting in insufficient heat transfer enhancement

Method used

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  • Combined heat dissipating device provided with fins and foam heat conduction structure
  • Combined heat dissipating device provided with fins and foam heat conduction structure
  • Combined heat dissipating device provided with fins and foam heat conduction structure

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A composite heat dissipation device with fins and foam heat conduction structure, used to assist the heat dissipation of the battery cell 5, its structure is as follows figure 1 , figure 2 with image 3 As shown, the composite heat dissipation device includes a casing sleeve 4 sleeved outside the battery cell 5, the material of the casing sleeve 4 is aluminum, and a foam structure 2 is filled between the casing sleeve 4 and the battery cell 5, and the foam structure 2 The height is similar to that of the battery cell 5, with a height of 60mm and a thickness of 2mm. The material of the foam structure 2 is porous copper foam with a pore density of 10PPI and a porosity of 70%. The foam structure 2 is filled with a melting point of 30~ Phase change material 1 at 33°C, phase change material 1 is paraffin, and four fins 3 separating the foam structure 2 are arranged between the shell sleeve 4 and the battery cell 5 to enhance heat transfer, and the fins 3 are rectangular ...

Embodiment 2

[0033]A composite heat sink with fins and a foam heat conduction structure, used to assist the heat dissipation of the battery cell 5, the composite heat sink includes a shell sleeve 4 sleeved outside the battery cell 5, and the material of the shell sleeve 4 is copper , the foam structure 2 is filled between the shell sleeve 4 and the battery cell 5, the height of the foam structure 2 is similar to the height of the battery cell 5, the height is 100mm, and the thickness is 7mm. The material of the foam structure 2 is 100PPI, pore density Porous aluminum foam with a rate of 99%. The foam structure 2 is filled with a phase-change material 1 with a melting point of 45-48°C. The phase-change material 1 is paraffin. Four fins 3 separating the foam structure 2 are used to enhance heat transfer. The fins 3 are rectangular fins whose height is similar to that of the battery cell 5. The height is 100 mm and the thickness is 1.5 mm. The material of the fins 3 is copper. , the two sides...

Embodiment 3

[0035] A composite heat sink with fins and a foam heat conduction structure, used to assist the heat dissipation of the battery cell 5, the composite heat sink includes a shell sleeve 4 sleeved outside the battery cell 5, and the material of the shell sleeve 4 is aluminum , the foam structure 2 is filled between the shell sleeve 4 and the battery cell 5, the height of the foam structure 2 is similar to the height of the battery cell 5, the height is 80 mm, and the thickness is 4 mm. Porous graphite foam with a rate of 85%. The foam structure 2 is filled with a phase-change material 1 with a melting point of 78-80°C. The phase-change material 1 is paraffin. Four fins 3 separating the foam structure 2 are used to enhance heat transfer. The fins 3 are rectangular fins whose height is similar to that of the battery cell 5. The height is 80mm and the thickness is 0.9mm. The material of the fins 3 is aluminum , the two sides of the fin 3 are closely attached to the shell sleeve 4 an...

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Abstract

The invention relates to a combined heat dissipating device provided with fins and a foam heat conduction structure and used for assisting heat dissipation of an individual battery (5). The combined heat dissipating device comprises a shell sleeve (4) sleeving the individual battery (5), wherein a foam structure fills the space between the shell sleeve (4) and the individual battery (5), the foam structure (2) is full filled with a phase-change material (1), multiple fins (3) separating the foam structure (2) are further arranged between the shell sleeve (4) and the individual battery (5), and the two sides of each fin (3) are respectively in tight fit with the shell sleeve (4) and the individual battery (5). Compared with the prior art, the combined heat dissipating device has the advantages of effectively reducing the temperature of a lithium ion battery and preventing thermal runaway.

Description

technical field [0001] The invention relates to the technical field of heat dissipation of lithium ion batteries, in particular to a composite heat dissipation device with fins and a foam heat conduction structure. Background technique [0002] Automotive power batteries such as lithium-ion batteries have high energy density, small size, and long cycle life, so they have great potential for application in electric vehicles. However, since the temperature rise of lithium-ion batteries during the charging and discharging process affects their performance and cycle life, too high temperature may even cause thermal runaway, leading to accidents such as spontaneous combustion, so the research and implementation of power lithium-ion battery heat dissipation technology is particularly urgent. Cooling systems are usually air-cooled or liquid-cooled. The air-cooled heat dissipation system is small in size, but has limited heat dissipation effect, while the liquid cooling system has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/625H01M10/655
CPCY02E60/10
Inventor 张恒运邓宇晨严晓陈浩王岩松
Owner SHANGHAI MAKESENS ENERGY STORAGE TECH CO LTD
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