Power battery heat dissipation method based on ionic liquid phase change material and liquid cooling

A phase change material, ionic liquid technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of easy overcooling, easy volatilization, low heat removal efficiency, etc., to improve the heat transfer effect and avoid damage.

Pending Publication Date: 2020-12-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the low performance of phase change materials, low heat removal efficiency, flammable, explosive and volatile, relatively low melting point and phase change heat, easy overcooling, and other shortcomings, and the traditional liquid cooling method has the risk of lea

Method used

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  • Power battery heat dissipation method based on ionic liquid phase change material and liquid cooling
  • Power battery heat dissipation method based on ionic liquid phase change material and liquid cooling
  • Power battery heat dissipation method based on ionic liquid phase change material and liquid cooling

Examples

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Embodiment 1

[0059] Such as Figure 1-2 As shown, the power battery heat dissipation device of this embodiment includes a battery box 1 and a liquid cooling box 2 arranged in close contact with each other, and 20 cylindrical solid heat-conducting members 4 (heat-conducting pipes).

[0060] Wherein, the battery box 1 includes 3 groups of power batteries 3 (power battery modules) arranged at intervals in the middle and an ionic liquid phase change material 6 filling the surrounding space, and the ionic liquid phase change material 6 is used to absorb the heat generated by the power battery 3 , the ionic liquid phase change material 6 used is 1-methyl-3-hexadecyl imidazolium bromide and 1,2-dimethyl-3-hexadecyl imidazolium bromide with a mass ratio of 1:0.5, And it is doped with porous material with a volume fraction of 28% (porosity is 93%, particle size is 2mm).

[0061] The inside of the liquid-cooled box 2 can circulate cooling liquid for deriving the heat in the liquid-cooled box 2. The...

Embodiment 2-7

[0066] Using the device and method in Example 1, the only difference is that the mass ratio of 1-methyl-3-hexadecyl imidazolium bromide and 1,2-dimethyl-3-hexadecyl imidazolium bromide is as follows Table 1. The temperature measured by the temperature sensor 9 is shown in Table 1.

[0067] Table 1

[0068]

[0069] As shown in Table 1, using the power battery heat dissipation method of the present invention can ensure efficient heat dissipation and stable and uniform temperature of the power battery 3 .

Embodiment 8

[0071] Using the apparatus and method in Example 1, the only difference is that only 1-methyl-3-hexadecyl imidazolium bromide is used. The average temperature measured by the temperature sensor 9 is 46.0±2.4° C., which can ensure efficient heat dissipation and stable and uniform temperature of the power battery 3 .

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Abstract

The invention relates to the field of power battery heat management and discloses a power battery heat dissipation method based on an ionic liquid phase change material and liquid cooling. The methodcomprises the following steps that heat generated by the power battery is absorbed by utilizing an ionic liquid phase change material; heat absorbed by the ionic liquid phase-change material is transferred to the liquid cooling tank through a heat conducting piece; and then the cooling liquid flowing in the liquid cooling box exports the heat in the liquid cooling box. The power battery heat dissipation method is based on the ionic liquid phase change material and liquid cooling, absorbs heat generated by the battery under working or abnormal conditions through ionic liquid phase change, rapidly removes the heat through a mode of combining fins and liquid cooling, and recovers the heat storage capacity of the ionic liquid phase change material.

Description

technical field [0001] The invention relates to the field of power battery heat management, in particular to a power battery heat dissipation method based on ionic liquid phase change materials and liquid cooling. Background technique [0002] With the increasing shortage of oil resources and the increasingly severe environmental pollution problems, electric vehicles have shown outstanding advantages in reducing oil resource consumption, energy saving and emission reduction. In recent years, the sales of electric vehicles at home and abroad have grown rapidly. [0003] The power battery is the core component of electric vehicles, and its performance directly determines the efficiency and safety of electric vehicles. In order to ensure the efficiency and safety of the power battery, its temperature must be strictly controlled. If the temperature of the battery pack is too high, it will accelerate the aging of the electrolyte, electrodes and other materials, and reduce the el...

Claims

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Application Information

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IPC IPC(8): H01M10/613H01M10/617H01M10/625H01M10/653H01M10/6551H01M10/6569H01M10/6556H01M10/6568
CPCH01M10/613H01M10/625H01M10/653H01M10/6551H01M10/6569H01M10/6556H01M10/6568H01M10/617Y02E60/10
Inventor 刘静如王振刚贾学五张帆费轶张向倩
Owner CHINA PETROLEUM & CHEM CORP
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