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Battery heat conduction structure and battery module

A heat-conducting structure and battery module technology, applied in the field of battery energy storage, can solve the problems of reducing the service life, not meeting the battery module, reducing the charging and discharging efficiency, etc., to reduce temperature differences, prolong the service life, and be widely applicable.

Inactive Publication Date: 2020-11-10
JIANGSU TIANHE ENERGY STORAGE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat conduction sheet / plate generally has the same thermal conductivity. This uniform heat conduction design does not conform to the complex anisotropic structure of the battery module, and cannot meet the requirements of uniform temperature control under various operating conditions. Inconsistent temperature will lead to inconsistent battery status, reduce charge and discharge efficiency, and reduce service life

Method used

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  • Battery heat conduction structure and battery module
  • Battery heat conduction structure and battery module
  • Battery heat conduction structure and battery module

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0027] Such as figure 1 As shown, a battery heat conduction structure includes a battery 1 and a heat conduction sheet 2 connected to the battery 1, and the heat conduction sheet 2 has at least two different heat conduction coefficients. The thermal conductivity of the heat conducting sheet 2 is between 0.1-500W / (m·K).

[0028] The positive tab 1a and the negative tab 1b of the battery 1 are located on the same side of the battery 1. In this case, the thermal conductivity of the heat conducting sheet 2 gradually decreases from the side close to the tab of the battery 1 to the other side. In this embodiment, The thermal conductivity of the part of the heat conducting sheet 2 close to the tab of the battery 1 is higher than that of the part on the other side.

[0029] Specifically, the heat conduction sheet 2 is composed of two heat conduction sheets made of different materials. figure 1 As shown, the first split sheet 2a and the second split sheet 2b are combined into a therm...

Embodiment 2

[0036] Such as figure 2 As shown, a battery heat conduction structure includes a battery 1 and a heat conduction sheet 2 connected to the battery 1, and the heat conduction sheet 2 has at least two different heat conduction coefficients. The thermal conductivity of the heat conducting sheet 2 is between 0.1-500W / (m·K).

[0037] The positive tab 1a and the negative tab 1b of the battery 1 are located on both sides of the battery 1. In this embodiment, the heat conduction sheet 2 has three kinds of thermal conductivity coefficients in the same sheet, and the thermal conductivity of the part close to the tab of the battery 1 The coefficient is relatively large, which is greater than the thermal conductivity of the middle part of the heat conducting sheet 2 . Specifically, if figure 2 As shown, the heat conduction sheet 2 is composed of the third split sheet 2c, the fourth split sheet 2d and the fifth split sheet 2e, and the thermal conductivity coefficients of the third split...

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Abstract

The invention belongs to the technical field of battery energy storage, and particularly relates to a battery heat conduction structure and a battery module. The battery heat conduction structure comprises a battery and a heat conduction sheet connected with the battery, wherein the heat conduction sheet has at least two different heat conduction coefficients. The battery module comprises a plurality of batteries and heat-conducting fins which are alternately connected, and a heat dissipation piece connected with the heat-conducting fins, and the heat-conducting fins have at least two different heat conductivity coefficients. The heat-conducting fins / plates with different heat conductivity coefficients are optimally arranged, the heat transfer process of the single battery is regulated andcontrolled, and the temperature difference of the battery is reduced, so the performance of the battery is improved, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of battery energy storage, and relates to a battery heat conduction structure and a battery module. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high charge-discharge conversion efficiency, and long life. They are widely used in electric vehicles, power energy storage, communication base stations, and backup power supplies. The rated voltage of the single battery is low (for example, the rated voltage of the lithium iron phosphate battery is 3.2V, and the ternary lithium battery is 3.7V), and the capacity is small (several to hundreds of Ah). In different applications, single lithium batteries need to be grouped in series, parallel or hybrid interconnection to achieve sufficient DC side voltage and system capacity. [0003] Temperature is an important factor affecting the performance and life of Li-ion batteries and battery modules. The capacity, efficienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/6555H01M10/653H01M10/617H01M10/625H01M10/627H01M10/647H01M10/6563H01M10/6567H01M10/0525
CPCH01M10/0525H01M2220/10H01M2220/20H01M10/617H01M10/625H01M10/627H01M10/647H01M10/653H01M10/6555H01M10/6563H01M10/6567Y02E60/10
Inventor 盛赟卞铁铮冯志强戴忠梁张臻
Owner JIANGSU TIANHE ENERGY STORAGE CO LTD