Safe and energy-saving lithium battery pack dual-mode thermal management system and method

A thermal management system and battery pack technology, applied in the direction of batteries, secondary batteries, battery pack components, etc., can solve problems such as high safety hazards, low heat dissipation efficiency, and large battery damage, so as to prevent excessive temperature and suppress heat. runaway effect

Pending Publication Date: 2020-01-17
赵耀华 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of large safety hazards, low heat dissipation efficiency, large damage to the battery, and inability to solve the problem of thermal runaway in the parking state in the prior art, the present invention proposes a safe and energy-saving dual-mode thermal management system for lithium battery packs

Method used

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  • Safe and energy-saving lithium battery pack dual-mode thermal management system and method
  • Safe and energy-saving lithium battery pack dual-mode thermal management system and method
  • Safe and energy-saving lithium battery pack dual-mode thermal management system and method

Examples

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Embodiment 1

[0039] like Figure 1-3 As shown, a safe and energy-saving lithium battery pack dual-mode thermal management system in this embodiment includes horizontal cells in the battery pack, a liquid-cooled plate-tube heat exchanger 2 attached to the outside of the battery pack shell 1, and an outer shell. An air-cooling module is installed, and the side of the external air-cooling module is a fan 10, and the inside has air-cooling fins 9. The horizontal cells in the battery pack are divided into four layers, each layer has three vertical and horizontal layers. The upper and lower surfaces of the three battery units 5 in each horizontal layer are attached to two sets of micro heat pipe arrays 6 extending in the lateral direction. The micro heat pipe array 6 is a flat heat conductor with a porous structure formed by extrusion of a metal material, and has a plurality of micro heat pipes arranged side by side that are not connected to each other and operate independently, and the hydrauli...

Embodiment 2

[0048] In order to ensure that the temperature difference between the air inlet and outlet of the air-cooling module is small, so that the temperature difference of all batteries is not higher than 5°C, the air duct of the air-cooling module in this embodiment is a static pressure box, as shown in Figure 5 As shown, other structures and working methods are similar to Embodiment 1.

Embodiment 3

[0050] The internal structure of the battery of this embodiment is as Image 6 As shown, only the lower side has the micro heat pipe array, both sides have the protruding part 61 and are bent upwards, and other structures and principles are consistent with the first embodiment.

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Abstract

The invention discloses a safe and energy-saving lithium battery pack dual-mode thermal management system and method, and the system comprises one or more layers of batteries and / or battery modules ina battery pack, a battery pack housing, a liquid cooling plate-tube heat exchanger, and an external air cooling module, the internal of the external air cooling module is provided with air cooling fins, and the side surface of the external air cooling module is provided with a fan; a micro heat pipe array is attached to the upper surface and / or the lower surface of the battery and / or the batterymodule, the part attached to the surface of the battery and / or the battery module is an evaporation section, and at least one end of the micro heat pipe array extends out of the surface of the batteryand / or the battery module to serve as a condensation section to be attached to a battery pack shell. The battery pack shell is at least provided with a heat conduction partition plate at the positioncorresponding to the condensation section; the liquid cooling plate-tube heat exchanger is at least correspondingly attached to the outer surface of the heat conduction partition plate and connectedwith a refrigerating system outside the battery pack, and a base plate of the external air cooling module is attached to the outer side of the liquid cooling plate-tube heat exchanger. And the advantages of high heat dissipation efficiency, safety, energy conservation and the like are achieved.

Description

technical field [0001] The invention relates to a dry-wet separation battery pack thermal management method and system, 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 liquid cooling mode. At present, mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/615H01M10/617H01M10/625H01M10/635H01M10/6551H01M10/6552H01M10/6554H01M10/6556H01M10/6563H01M10/6567H01M10/657H01M2/10B60L58/26B60L58/27
CPCB60L58/26B60L58/27H01M2220/20H01M10/613H01M10/615H01M10/617H01M10/625H01M10/635H01M10/6551H01M10/6552H01M10/6554H01M10/6556H01M10/6563H01M10/6567H01M10/657H01M50/20Y02E60/10Y02T10/70
Inventor 赵耀华徐红霞
Owner 赵耀华
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