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Heat radiation method and device for built-in electromobile battery pack

A technology for electric vehicles and heat sinks, applied in batteries, secondary batteries, circuits, etc., can solve the problems of uneven temperature distribution, poor cooling efficiency, large weight and volume of heat sinks, etc., to ensure uniform temperature distribution and low temperature. , The effect of efficient and rapid isothermal heat diffusion

Active Publication Date: 2015-05-13
中科五环新能源汽车热管理技术(武汉)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the direct air cooling method, the heat transfer coefficient between the air and the surface of the battery is very low, and the surface area of ​​the battery is small, resulting in poor cooling efficiency, and the surface temperature of the battery is easy to be too high
In addition, whether it is parallel or serial ventilation, some battery cells closely arranged in the central area of ​​the battery pack have poor heat dissipation conditions due to the fact that the battery surface cannot be in contact with the air, resulting in the gap between these battery cells and other battery cells. Excessive temperature difference
In addition to the above, the disadvantages of the liquid cooling method include: high sealing requirements, relatively large weight and volume of the heat sink, complicated repair and maintenance, requiring components such as water jackets and heat exchangers, and relatively complicated structures. There is a large temperature difference between different battery cells
[0004] Excessively high battery surface temperature or uneven temperature distribution will eventually reduce the battery charge and discharge cycle efficiency, affect the power and energy performance of the battery, and even lead to thermal runaway in severe cases, affecting the safety and reliability of the battery

Method used

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  • Heat radiation method and device for built-in electromobile battery pack
  • Heat radiation method and device for built-in electromobile battery pack
  • Heat radiation method and device for built-in electromobile battery pack

Examples

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Embodiment 1

[0034] Below in conjunction with accompanying drawing and embodiment the present invention is described in detail:

[0035] Please see attached image. For the electric vehicle battery pack battery group equipment composed of 12 high-power battery cells, a built-in electric vehicle battery group heat dissipation system with forced air cooling mode cold end is made. It includes a battery cell 1, a vacuumized "I"-shaped multi-channel micro-groove group composite phase-change cooling module 2 (such as Figure 1A and 1B shown), battery pack case 7 and fan 8 with ventilation holes on the case wall (such as image 3 and 4 shown).

[0036] see Figure 2A , 2B, 2C. Each battery cell 1 is provided with two "I"-shaped multi-channel micro-groove composite phase-change cooling modules 2, each of which takes heat from one side of the battery cell 1. The central part of each "I"-shaped multi-channel micro-groove group composite phase-change heat dissipation module 2 is a vacuumized an...

Embodiment 2

[0039] For the electric vehicle battery pack battery group equipment composed of 12 high-power battery cells, a built-in electric vehicle battery group heat dissipation system with forced liquid cooling mode cold end is made. Change the ventilation holes opened on the outer wall of the battery pack case 7 in Embodiment 1 to open the liquid inlet 9 and the liquid outlet 10 of the insulating cooling liquid entering and leaving the battery pack case 7 on the outer wall of the battery pack case 7, as Figure 4 shown. Using an external liquid pump, the insulating cooling liquid enters the battery pack box from the liquid inlet 9, and then divides into multiple flow paths, flowing from top to bottom between each adjacent two groups (two rows) of battery cells. The channel gap and the gap between the ribs 5 of each "I"-shaped multi-channel micro-groove group composite phase-change heat dissipation module 2; take away the heat of the battery cell. Other parts of this embodiment are t...

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Abstract

The invention discloses a heat radiation method and device for a built-in electromobile battery pack. According to the heat radiation device, a multi-channel micro slot group composite phase change heat radiation module is connected with a heating surface on each side of each single battery inside the battery pack, each multi-channel micro slot group composite phase change heat radiation module is an I-shaped heat radiation module consisting of a cavity connected with fins on two sides; the heating surfaces on two sides of each single battery are respectively connected with the cavities; every two multi-channel micro slot group composite phase change heat radiation modules are arranged in one row in an alternative insertion manner; a channel gap in which air or insulating cooling fluid can flow conveniently is formed between every two adjacent rows of the multi-channel micro slot group composite phase change heat radiation modules; the single batteries and the multi-channel micro slot group composite phase change heat radiation modules are mounted in a battery pack box; ventilation holes or liquid inlets and liquid outlets of the insulating cooling fluid are formed in the upper side and the lower side of the battery pack box. The invention further discloses a heat radiation method for the built-in electromobile battery pack.

Description

technical field [0001] The invention relates to a heat dissipation and thermal control system for a battery pack of an electric vehicle, in particular to a built-in heat dissipation system for a battery pack for an electric vehicle which is composed of a plurality of high-power battery cells. Methods and devices. Background technique [0002] At present, there are two methods of heat dissipation for electric vehicle battery packs, direct air cooling and liquid cooling. The direct air cooling method is to let the air flow directly over the heating surface of each battery cell in the form of serial ventilation or parallel ventilation, and take away the heat generated by the battery to reduce and control the surface temperature of the battery; the liquid cooling method is to let the cooling liquid directly Or indirectly flow through the heating surface of each battery cell in the battery pack, taking away the heat generated when the battery is working to reduce and control the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/625H01M10/6551H01M10/6552H01M10/6557H01M10/6568
CPCH01M2220/20Y02E60/10
Inventor 胡学功王际辉
Owner 中科五环新能源汽车热管理技术(武汉)有限公司
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