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Water cooling and composite phase change material combined power battery heat dissipating device

A technology of composite phase change materials and power batteries, which is applied in the direction of batteries, secondary batteries, circuits, etc., can solve the problems of poor temperature consistency and low heat dissipation efficiency, and achieve good consistency, high heat dissipation rate, and convenient operation and maintenance Effect

Active Publication Date: 2014-12-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the defects of low heat dissipation efficiency and poor temperature consistency existing in the existing power battery heat dissipation device, and provide a kind of heat dissipation effect, no liquid leakage of the phase change material, high thermal conductivity, which can effectively realize the heat release of the phase change material Power battery cooling device combined with unique water cooling and composite phase change materials

Method used

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  • Water cooling and composite phase change material combined power battery heat dissipating device
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  • Water cooling and composite phase change material combined power battery heat dissipating device

Examples

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Effect test

Embodiment 1

[0035] Tetradecane (molecular formula: C 24 h 50 ) and expanded graphite composite phase change material 4, its phase transition temperature is 50°C, where C 24 h 50The mass fraction is 90%, and the phase change material is solid at room temperature. Select 15 3.2V20Ah single batteries, and use the series connection to form a battery module. When the battery module is discharged with high power, the temperature of the battery monomer rises rapidly, and its heat is transferred to the composite phase change material through the battery shell. When the temperature is high At 50°C, the composite phase change material 4 absorbs heat and undergoes a solid-liquid phase transition, but the composite phase change material 4 still maintains solid properties and stores heat, thereby realizing heat dissipation and cooling of the battery cell and controlling the temperature of the battery cell When the ambient temperature is 25°C and the discharge time is 20s, the surface temperature of...

Embodiment 2

[0037] Using lauric acid (molecular formula: CH 3 (CH 2 ) 10 COOH) and expanded graphite composite phase change material 4, its phase transition temperature is 43 °C, where CH 3 (CH 2 ) 10 The mass fraction of COOH is 87%, and the phase change material is solid at room temperature. Select 15 3.2V20Ah single batteries, and adopt the method of connecting in series to form a battery pack module; when the battery module is discharged with high power, the temperature of the battery monomer rises rapidly, and its heat is transferred to the composite phase change material 4 through the battery shell. When the temperature is higher than 43°C, the composite phase change material 4 absorbs heat and undergoes a solid-liquid phase transition, but the composite phase change material 4 still maintains solid properties and stores heat, thereby realizing heat dissipation and cooling of the battery cell and controlling the temperature of the battery cell. The temperature rises; when the a...

Embodiment 3

[0039] Using palmitic acid (molecular formula: CH 3 (CH 2 ) 14 COOH) and expanded graphite composite phase change material 4, its phase transition temperature is 64 ° C, where CH 3 (CH 2 ) 14 The mass fraction of COOH is 60%, and the phase change material is solid at room temperature. Select 15 3.2V20Ah single batteries, and adopt the method of connecting in series to form a battery pack module; when the battery module is discharged with high power, the temperature of the battery monomer rises rapidly, and its heat is transferred to the composite phase change material 4 through the battery shell. When the temperature is higher than 64°C, the composite phase change material 4 absorbs heat and undergoes a solid-liquid phase transition, but the composite phase change material 4 still maintains solid properties and stores the heat, so as to realize the heat dissipation and cooling of the battery cell and control the temperature of the battery cell. The temperature rises; when...

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Abstract

The invention discloses a water cooling and composite phase change material combined power battery heat dissipating device which comprises a box body and a base plate arranged at the bottom of the box body, wherein a water inflow channel and a water outflow channel which are used for accommodating cooling water are respectively arranged inside the base plate and along two long edges, aperture passages communicated with the water inflow channel and the water outflow channel respectively are arranged on the upper surface of the base plate and along the two long edges, tabular micro-channel heat exchangers are arranged on the base plate at certain intervals in the length direction, micropore flow passages are arranged inside the tabular micro-channel heat exchangers, the two end ports of each micropore flow passage are respectively connected with an aperture passage I communicated with the water inflow channel and an aperture passage II communicated with the water outflow channel, and spaces formed by the tabular micro-channel heat exchangers, the base plate and the box body are filled with a composite phase change material. The water cooling and composite phase change material combined power battery heat dissipating device provided by the invention has the advantages of high heat accumulation and heat dissipation rates, convenience in operation and maintenance, low cost and the like, can be used for heat dissipation of high-power and quick charge-discharge power batteries, and can improve the working performance and the reliability of batteries.

Description

technical field [0001] The invention belongs to the technical field of power battery temperature control, relates to a heat dissipation method for a power battery, and in particular to a device for combining water cooling and a composite phase change material for heat dissipation of a power battery. Background technique [0002] Due to the advantages of no pollution, low noise, simple structure, convenient use and maintenance, and high energy conversion efficiency, electric vehicles have become the development direction of future automobiles. As the heart of electric vehicles, the power battery is the source of power for the vehicle, and it is also a key factor restricting the development of electric vehicles. [0003] In recent years, power batteries have gradually become the mainstream power source for electric vehicles. In electric vehicles, usually a plurality of single cells are connected in series or in parallel in different forms to form a battery device to provide t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/6567H01M10/659H01M10/625H01M10/613
CPCH01M2220/20Y02E60/10
Inventor 张正国方晓明徐涛高学农
Owner SOUTH CHINA UNIV OF TECH
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