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Power battery module cooling system

A technology of heat dissipation system and power battery, applied in secondary batteries, circuits, electrical components, etc., can solve the problems affecting the surface temperature uniformity of power battery modules, overheating, and high heat dissipation energy consumption

Active Publication Date: 2021-09-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water-cooling system generally only works on the side or bottom of the power battery module, which consumes a lot of energy for heat dissipation, and also affects the temperature uniformity of the surface of the power battery module, which is likely to cause local overheating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Under the 1C discharge rate of the battery module 100, the heat dissipation effect of the battery surface between the present invention and the traditional bottom water-cooled heat dissipation method is studied. The battery module with a penetrating water-cooled plate installed at the bottom is used as a blank control group, and the power battery module of the present invention is used to dissipate heat. system as the experimental group.

[0045] The battery module 100 has a capacity of 120Ah, and the ambient temperature during the test is 28°C. A constant temperature water tank is used to continuously supply cooling water at a temperature of 25°C to the bottom water cooling block, and the water flow rate is 100L / h. During the test, six temperature measurement points were arranged on the surface of the battery module 100 . Wherein, there are two electrodes, one side surface and two bottom surfaces respectively.

[0046] Such as image 3 As shown, under the traditional...

Embodiment 2

[0049] Under the discharge rate of 1C of the battery module 100, the battery surface heat dissipation effect of the power battery module heat dissipation system of the present invention and the traditional bottom water cooling heat dissipation method is studied. The battery module with the water-cooled plate installed at the bottom is used as the blank control group, and the heat dissipation system of the battery module using the semiconductor cooling sheet composite water cooling block is used as the experimental group. section, the heating surface is attached to the surface of the water cooling block through the heat conduction layer. Use a constant temperature water tank to continuously feed cooling water with a water temperature of 25°C into the bottom water cooling block, and the water flow rate is 100L / H.

[0050] Such as Figure 5 As shown, the heat dissipation method using semiconductor refrigeration sheet composite water cooling block in the condensation section of t...

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Abstract

The invention discloses a power battery module heat dissipation system, and the system comprises a battery module, a heat dissipation assembly and a water-cooling heat dissipation module; the battery module comprises a shell and a plurality of battery cell units, the battery cell units are placed in a containing cavity, and the battery cell units are connected in series or in parallel to form a group and are packaged and formed through the shell; the heat dissipation assembly comprises a plurality of transverse heat pipes arranged in an array and a plurality of longitudinal heat pipes arranged in an array; the transverse heat pipes and the longitudinal heat pipes are combined to form an installation area, the battery module is installed in the installation area, heat dissipation working media are arranged in the transverse heat pipes and the longitudinal heat pipes, and the transverse heat pipes are connected with the water-cooling heat dissipation module; in the charging and discharging process of the battery module, the heat inside the battery module and near an electrode is quickly transferred to the bottom of the battery module through the longitudinal heat pipes and then transferred to the water-cooling heat dissipation module through the transverse heat pipes for heat dissipation, so the problem of heat accumulation inside the battery module is effectively solved, the temperature of the side wall of the battery module and near the electrode is reduced, and the temperature uniformity and the heat dissipation efficiency of the battery module are improved.

Description

technical field [0001] The invention relates to the technical field of heat dissipation of lithium-ion power batteries, in particular to a power battery module heat dissipation system. Background technique [0002] With the depletion of fossil energy and the deterioration of the ecological environment, the energy and environmental crisis has become a common challenge faced by all countries in the world today. As the first choice for green batteries, lithium-ion power batteries have been popularized and applied in many fields such as electric vehicles, energy storage systems, and mobile electronic devices because of their advantages such as high efficiency, high energy density, and long cycle life. However, lithium-ion batteries have very strict temperature requirements. Excessively high temperatures will lead to serious degradation of battery performance, and even safety accidents such as battery thermal runaway. [0003] At present, the heat dissipation of most power batte...

Claims

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Application Information

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IPC IPC(8): H01M10/613H01M10/617H01M10/6552H01M10/6556H01M10/6567H01M10/6568H01M10/6572
CPCH01M10/613H01M10/617H01M10/6552H01M10/6556H01M10/6567H01M10/6568H01M10/6572Y02E60/10
Inventor 袁伟黄尧汤勇张晓清杨阳王淳
Owner SOUTH CHINA UNIV OF TECH
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