An air-cooled cylindrical power battery pack with bionic surface microstructure heat sink

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

Active Publication Date: 2022-04-08
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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  • An air-cooled cylindrical power battery pack with bionic surface microstructure heat sink
  • An air-cooled cylindrical power battery pack with bionic surface microstructure heat sink
  • An air-cooled cylindrical power battery pack with bionic surface microstructure heat sink

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An air-cooling cylindrical power battery pack containing a bionic surface microstructure heat (including fan 1, housing 2, insulating frame 3, bionic surface microstructured heat sink 4, cylindrical power battery 5. The outside air is driven by the fan 1, and enter the battery module, flowing out of the other end of the battery pack after passing through the multilayer cylindrical power battery 5. The bionic surface microstructured heat dissipator 4 has an arc surface 7 and a right angle surface 8, and the diameter of the arc surface 7 is in diameter as the cylindrical power battery 5, and the outer side of the arc surface 7 is in contact with the cylindrical power battery 5, and the intermediate thermally conductive glue is excluded. Air, increase thermal conductivity. Between the four bionic surface microstructured heatns 4, the space between the cylindrical power cells 5 is embedded after contact with the vertical angle surface 8, and the air-cooling heat dissipation eff...

Embodiment 2

[0031] The present invention has an effect of heat dissipation for the cylindrical power battery pack, and the 18650 cylindrical battery 5 in the present invention may be a cylindrical battery such as 26650, 26650, 32650. At the same time, the present invention is equally applicable when the battery distribution spacing and arrangement are changed.

Embodiment 3

[0033] The cross section of the bionic surface microstructure 6 can be a rectangular or triangular or trapezoidal or elliptical shape, and the height of the bionic surface microstructure 6 is 0.4-1.4 mm, and the spacing S of the bionic surface microstructure 6 is twice the height H. The three-layer bionic surface microstructured heat dissipation 4 axially combined, after the battery pack is installed, the integral axial length L is 41-201 mm. According to the use of the battery module, when the wind speed is 0.8 m / s, the cross-sectional shape, height, and overall length of the bionic surface microstructure 6 can be performed accordingly.

[0034] When the cross-sectional shape and overall length of the bionic surface microstructure 6 are triangles and 201 mm, with the increase in the microstructure height, the highest temperature and maximum temperature difference of the battery module gradually decrease. When the microstructure height increases from 0.4 mm to 1.4 mm, the highes...

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Abstract

The invention discloses an air-cooled cylindrical power battery pack containing a bionic surface microstructure heat sink, and belongs to the technical field of power battery thermal management. The battery pack mainly includes a fan, a casing, an insulating fixing frame, a heat sink with a bionic surface microstructure, and a cylindrical power battery. Wherein, the outside of the curved surface of the bionic surface microstructure heat sink is in contact with the battery surface, and the inside of the curved surface is provided with a bionic surface microstructure. The cylindrical power battery is arranged axially. When the fan drives the cooling airflow into the battery pack, the bionic surface microstructure heat sink can improve the heat exchange efficiency between the cooling airflow and the battery. Insulation fixtures are installed between each row of batteries for support and insulation. On the basis of the traditional axial air cooling, the present invention adds bionic surface micro-structure cooling parts, does not change the size and structure of the battery pack, and has the advantages of convenient installation, simple structure, and enhanced heat dissipation effect.

Description

Technical field [0001] The present invention relates to the field of power battery thermal management, and more particularly to an air-cooling cylindrical power battery pack containing a microstructured heat dissipator of a bionic surface. Background technique [0002] Lithium ion batteries are widely used in various powered equipment because of their efficient, clean, high capacity. All countries have introduced new energy vehicles to replace traditional fuel vehicles, and lithium-ion batteries have gradually become a hot spot in new energy markets. At present, the direction of development of power batteries is high-capacity laminated nickel-watenganese three-dimensional material, but as battery energy storage densities increase, the problem of thermal stability is more prominent. Evergreen or too low temperatures, and uneven temperature distribution between the batteries will directly affect the life of the power battery and performance, and lead to the security problem of the ...

Claims

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Application Information

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Patent Type & Authority Patents(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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