Air-cooling lithium battery pack thermal management system and method with high protection level

A management system, air-cooled technology, used in batteries, secondary batteries, battery pack components, etc., can solve problems such as high safety hazards, low heat dissipation efficiency, and inability to use, to prevent excessive temperature, suppress thermal runaway, High heat dissipation effect

Inactive Publication Date: 2019-08-16
赵耀华 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of the existing technology, such as large potential safety hazards, low heat dissipation efficiency, great damage to the battery, no energy s

Method used

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  • Air-cooling lithium battery pack thermal management system and method with high protection level
  • Air-cooling lithium battery pack thermal management system and method with high protection level
  • Air-cooling lithium battery pack thermal management system and method with high protection level

Examples

Experimental program
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Effect test

Example Embodiment

[0037] Example 1

[0038] like Figure 1-3As shown, an air-cooled lithium battery pack thermal management system with a high protection level in this embodiment includes a battery pack and an external air-cooling module 2 attached to the outside of the battery pack casing 1 , and the external air-cooling module includes a fan 4 and air cooling fins 3. The battery cells in the battery pack are divided into four layers, and each layer has three vertical and horizontal layers. The upper and lower surfaces of the three lateral battery cells 5 of each layer are respectively fitted with two sets of laterally extending micro heat pipe arrays 6 . The micro heat pipe array 6 is a flat thermal conductor with a porous structure formed by extrusion of a metal material, and has a plurality of mutually disconnected micro heat pipes arranged side by side inside, and a phase change working medium is encapsulated inside the micro heat pipes. The micro heat pipe array 6 is a thermal conducto...

Example Embodiment

[0045] Example 2

[0046] In order to ensure that the temperature difference between the air in and out of the air-cooled module is small, so that the temperature difference of all batteries is not higher than 5°C, the air duct of the air-cooled module in this embodiment is in the form of a static pressure box, such as Figure 5 As shown, other structures and working methods are similar to those of Embodiment 1.

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Abstract

The invention provides an air-cooling lithium battery pack thermal management system and method with a high protection level. The system comprises a battery pack, a battery pack casing and an externalair-cooling module. A micro heat pipe array is attached to the surface of a battery or a battery module, and a protruding portion of the micro heat pipe array is attached to the battery pack shell. The external air-cooling module is in close contact with the outer surface of the battery pack outer casing, the external air-cooling module has an air-cooling fin inside and a fan at a side. Accordingto the invention, the micro heat pipe array with high heat transfer and an air cooling mode are effectively combined, the heat inside the battery can be effectively transmitted to the outside, the temperature is prevented from being too high, the uniform temperature of the battery is ensured, the heat dissipation efficiency is high. The control system can automatically start the fan, the externalair-cooling fin automatically dissipate heat to achieve un-cooling energy-saving heat dissipation, the automatic heat dissipation is carried out when the battery is heated during the parking of an electric vehicle, and major safety risks such as thermal runaway are greatly suppressed.

Description

technical field [0001] The invention relates to an air-cooled lithium battery pack thermal management system and method with a high protection level, belonging to the field of battery pack heat dissipation for electric vehicles. Background technique [0002] The thermal management of lithium battery packs is not only critical to battery life, but also critical to battery safety. [0003] The traditional battery pack thermal management method - air cooling technology not only cannot meet the requirements of the protection level of the lithium battery pack, but also due to the large temperature difference between the inlet and outlet of the air cooling system, resulting in a large temperature difference between the battery cell and the battery cell, which is harmful to the lithium battery. The damage is large, so it is basically useless at present. [0004] The traditional thermal management method of lithium battery packs with high protection level generally adopts the liqui...

Claims

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Application Information

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IPC IPC(8): H01M2/10H01M10/613H01M10/615H01M10/625H01M10/6551H01M10/6552H01M10/6563H01M10/657B60L58/26B60L58/27
CPCB60L58/26B60L58/27H01M2220/20H01M10/613H01M10/615H01M10/625H01M10/6551H01M10/6552H01M10/6563H01M10/657H01M50/20Y02E60/10Y02T10/70
Inventor 赵耀华徐红霞
Owner 赵耀华
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