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

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

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 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 and method 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

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Embodiment 1

[0037] Such as Figure 1-3 As shown, a safe and energy-saving lithium battery pack dual-mode thermal management system in this embodiment includes a battery pack, a liquid-cooled plate-tube heat exchanger 2 attached to the outside of the battery pack shell 1, and an external heat exchanger with a fan 10 The air-cooled fins 9, the batteries 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 extruding metal materials. There are a plurality of mutually disconnected micro heat pipes arranged side by side. The micro heat pipes are packaged with phase change working fluid. The micro heat pipe array 6 is a heat conductor with enhanced heat transfer effect. Wherein the micro he...

Embodiment 2

[0046] 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.

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Abstract

The invention provides a safe and energy-saving lithium battery pack dual-mode thermal management system and method. The system comprises a battery pack, a battery pack shell, a liquid-cooling tube heat exchanger, and an external air-cooling fin with a fan. 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 isattached to the battery pack shell. The liquid-cooling tube heat exchanger is attached to the outer surface of the battery pack shell and is connected to an electric vehicle refrigeration system, anda substrate of the external air-cooling fin is attached to the outside of the liquid-cooling tube heat exchanger. According to the invention, the micro heat pipe array with high heat transfer and aircooling and liquid cooling modes are effectively combined, on one hand, the heat inside the battery can be effectively transmitted to the outside, the temperature is prevented from being too high, theuniform temperature of the battery is ensured, the heat dissipation efficiency is high, on the other hand, different systems are started in different states and temperatures, and the avoidance of thermal runaway and substantial energy savings 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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