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Air-cooled cylindrical power battery pack containing bionic surface microstructure heat dissipation piece

A power battery pack and power battery technology, which is applied to secondary batteries, circuits, electrical components, etc., can solve the problems of low cooling efficiency of the air-cooled system, restricting development and application, and poor heat transfer performance, so as to reduce the temperature rise of the battery, Enhance thermal stability and save energy consumption

Active Publication Date: 2020-12-04
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat transfer performance of air convection heat dissipation is poor, and the cooling efficiency of air-cooled systems is generally low, which restricts its development and application.

Method used

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  • Air-cooled cylindrical power battery pack containing bionic surface microstructure heat dissipation piece
  • Air-cooled cylindrical power battery pack containing bionic surface microstructure heat dissipation piece
  • Air-cooled cylindrical power battery pack containing bionic surface microstructure heat dissipation piece

Examples

Experimental program
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Effect test

Embodiment 1

[0027] An air-cooled cylindrical power battery pack containing a bionic surface microstructure heat sink, including a fan 1, a casing 2, an insulating fixing frame 3, a bionic surface microstructure heat sink 4, and a cylindrical power battery 5. The outside air is driven by the fan 1, enters the battery module, passes through the multi-layer cylindrical power battery 5, and flows out from the other end of the battery pack. The bionic surface microstructure heat sink 4 has an arc surface 7 and a right-angle surface 8, the diameter of the arc surface 7 is the same as that of the cylindrical power battery 5, the outer side of the arc surface 7 is in contact with the surface of the cylindrical power battery 5, and the gap is eliminated with heat-conducting glue in the middle Air, increasing thermal conductivity. The four bionic surface microstructure heat sinks 4 are in contact with each other through the right-angled surface 8, and after being combined, they are embedded in the ...

Embodiment 2

[0031] The present invention is effective for heat dissipation of cylindrical power battery packs, and the 18650 type cylindrical battery 5 in the present invention can also be 26650, 26650, 32650 and other cylindrical batteries. At the same time, the present invention is also applicable when the distribution distance and arrangement of the batteries are changed.

Embodiment 3

[0033] The cross-section of the biomimetic surface microstructure 6 can be rectangular, triangular, trapezoidal or oval, the height of the biomimetic surface microstructure 6 is 0.4-1.4 mm, and the interval s of the biomimetic surface microstructure 6 is twice the height h. The three-layer bionic surface microstructure heat sink is assembled in the axial direction. After being installed in the battery pack, the overall axial length L is 41-201mm. According to the use of the battery module, when the inlet wind speed is 0.8m / s, the cross-sectional shape, height and overall length of the biomimetic surface microstructure 6 can be changed accordingly.

[0034] When the cross-sectional shape and overall length of the biomimetic surface microstructure 6 are triangular and 201 mm, respectively, the maximum temperature and maximum temperature difference of the battery module gradually decrease with the increase of the height of the microstructure. When the microstructure height increa...

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Abstract

The invention discloses an air-cooled cylindrical power battery pack containing a bionic surface microstructureheat dissipation piece, and belongs to the technical field of power battery thermal management. The battery pack mainly comprises a fan, a shell, an insulating fixing frame, the bionic surface microstructure heat dissipation piece and a cylindrical power battery, wherein the outer side ofthe curved surface of the bionic surface microstructure heat dissipation piece is in contact with the surface of the battery, and the inner side of the curved surface is provided with a bionic surface microstructure. The cylindrical power battery is axially arranged, and when the fan drives the cooling air flow to enter the battery pack, the bionic surface microstructure heat dissipation piece can improve the heat exchange efficiency between the cooling air flow and the battery. The insulating fixing frame is arranged between each row of batteries and plays a role in supporting and insulating. On the basis of traditional axial air cooling, the bionic surface microstructure heat dissipation piece is added, the size and the structure of the battery pack are not changed, and the battery packhas the advantages of being convenient to install, simple in structure, enhanced in heat dissipation effect and the like.

Description

technical field [0001] The invention relates to the technical field of thermal management of power batteries, in particular to an air-cooled cylindrical power battery pack containing bionic surface microstructure heat sinks. Background technique [0002] Lithium-ion batteries are widely used in various power equipment because of their high efficiency, cleanliness and high capacity. Various countries have successively introduced plans for new energy vehicles to replace traditional fuel vehicles, and lithium-ion batteries have gradually become a hot spot in the new energy market. At present, the development direction of power batteries is high-capacity layered nickel-cobalt-manganese ternary materials. However, with the increase of battery energy storage density, the problem of battery thermal stability becomes more prominent. Excessively high or low temperature and uneven temperature distribution between batteries will directly affect the service life and performance of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/625H01M10/647H01M10/6551H01M10/6563
CPCH01M10/613H01M10/625H01M10/647H01M10/6551H01M10/6563Y02E60/10
Inventor 杨文周飞周浩兵刘雨辰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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