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Thermal compensation system for electric vehicle battery pack

A technology of electric vehicles and compensation systems, applied in batteries, secondary batteries, circuits, etc., can solve problems such as temperature rise, battery pack performance not meeting design requirements and goals, battery life and performance degradation, etc., to achieve Improved service life, simple structure, and convenient maintenance and repair

Active Publication Date: 2014-08-06
STATE GRID CORP OF CHINA +3
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When an electric vehicle is just started or when climbing a slope, the battery pack will dissipate much more heat than during normal operation. It is often difficult for the cooling fan to dissipate the heat in a short period of time. This heat will cause the temperature of the battery pack cells to Rapid rise, when the temperature of the battery cell reaches above 45°C, the cell will be in the state of rapid discharge, while the cell that has not reached this temperature is still in the state of normal discharge, after many times, the service life of the cell in the state of rapid discharge and The performance will be greatly reduced, and the performance of the battery pack will not meet the initial design requirements and goals

Method used

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Embodiment Construction

[0013] see figure 1 and figure 2 As shown, the present invention discloses a heat dissipation compensation system for an electric vehicle battery pack, including a battery box (not shown), a plurality of battery cells 2 accommodated in the battery box, and a temperature equalization device for compensating the heat dissipation of the battery cells. The plurality of battery cells 2 are adjacently arranged to form a battery pack 7 . The temperature equalization device includes a composite phase change material plate 1 , a battery management system 9 , a temperature sensor 4 and a cooling fan 8 . The temperature sensor 4 is installed at the position where the heat dissipation temperature of the battery cell 2 is the highest, which helps to monitor the temperature of the cell; the battery management system 9 and the cooling fan 8 are installed in the battery box. The composite phase change material plate is provided with a heat dissipation copper mesh 6, and both sides of the c...

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Abstract

The invention discloses a thermal compensation system for an electric vehicle battery pack. The thermal compensation system comprises a battery box, battery cells and a temperature equalizing device, wherein the temperature equalizing device is used for thermal compensation of the battery cells, and comprises composite phase change material boards, a battery management system, a temperature sensor and a cooling fan; a composite phase change material board is clamped between two adjacent battery cells, and the outer surfaces of the outermost battery cells are coated with composite phase change material boards respectively. As the properties of a phase change material are utilized by the thermal compensation system, the heat absorption of the battery pack is realized, the normal working condition of the battery pack is guaranteed, the service lives of the battery cells are improved, the structure is simple, the maintenance and repair are convenient, and the reliability is higher.

Description

technical field [0001] The invention relates to the field of electric vehicle batteries, in particular to a heat dissipation compensation system for electric vehicle battery packs. Background technique [0002] With the development of clean energy electric vehicles, according to the actual needs of large buses and other large passenger vehicles, the improvement of the performance of electric vehicle battery packs is one of the key research aspects in the industry. [0003] When an electric vehicle is just started or when climbing a slope, the battery pack will dissipate much more heat than during normal operation. It is often difficult for the cooling fan to dissipate the heat in a short period of time. This heat will cause the temperature of the battery pack cells to Rapid rise, when the temperature of the battery cell reaches above 45°C, the cell will be in the state of rapid discharge, while the cell that has not reached this temperature is still in the state of normal di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/625H01M10/637H01M10/6555H01M10/6551H01M10/6563
CPCH01M2220/20Y02E60/10
Inventor 朱金大倪峰张卫国杨凤坤邓超刘华锋刘昭慧杨芳唐雾婺吾喻明谢敏周静颜盛军
Owner STATE GRID CORP OF CHINA
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