Heat dissipation and thermal runway dispersion protection structure in cell system

A technology of battery system and protective structure, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as overheating and uneven battery temperature

Inactive Publication Date: 2011-07-06
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention also has the function of heat conduction and heat dissipation, solves the problems of uneven

Method used

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  • Heat dissipation and thermal runway dispersion protection structure in cell system
  • Heat dissipation and thermal runway dispersion protection structure in cell system
  • Heat dissipation and thermal runway dispersion protection structure in cell system

Examples

Experimental program
Comparison scheme
Effect test

Example

[0064] The following presents a first embodiment according to the present invention, with regard to a heat dissipation and thermal runaway diffusion protection structure (such as figure 2 Shown) to block the thermal runaway diffusion of the battery and provide the battery pack heat dissipation function.

[0065] Please refer to figure 2 The heat dissipation and thermal runaway diffusion protection structure of this embodiment includes a battery pack (module) housing 200 and a plurality of composite heat conducting plates 210. A plurality of unit cells 202 are usually arranged in the battery pack casing 200, and only a part of the battery pack casing 200 is shown in this figure to simplify the drawing. As for the composite heat-conducting plate 210, it is located in the battery pack casing 200 in contact with the battery pack casing 200, and is inserted between at least two unit cells 202. in figure 2 In this case, the composite heat-conducting plate 210 is between two unit cel...

Example Embodiment

[0094] Simulation experiment example one

[0095] Simulate a structure similar to the first embodiment (such as Figure 8 ), which takes a square lithium battery as an example, and simulates a battery pack composed of lithium batteries 800a~g. After the composite heat conducting plate 802 is added to conduct heat conduction and heat insulation, the battery pack protects the heat of a single lithium battery 800a. The effect of uncontrolled diffusion. In the case of current lithium batteries, the starting temperature of the self-heating thermal runaway reaction (ie SEI) is about 80-90°C, and the critical temperature of the thermal runaway of the unit cell is about ~150°C.

[0096] In this experimental example, the thickness of each lithium battery 800a~g is 0.5cm (this is currently the most commonly used thickness for square aluminum foil-packed batteries), and the surface size of the simulated battery 800a~g is 10cm×13cm, The simulation is performed in the direction of height 13cm....

Example Embodiment

[0102] Simulation experiment example 2

[0103] Simulate a structure similar to the third embodiment (such as Picture 10 ), the size of the lithium battery 1000a~g is the same as that of the first simulation experiment. The simulated composite heat conducting plate 1002 is a three-layer structure composed of two heat conducting layers 1004 and a heat insulating layer 1006. The material, thickness, and thermal conductivity of each layer of the thermal conductive layer 804 and the thermal insulation layer 806 are the same as in the first simulation experiment, that is, the total thickness of the thermal conductive layer is 0.2 cm, and the thickness of the thermal insulation layer is 0.1 cm. The thermally conductive layer of the above-mentioned composite thermally conductive plate 1002 occupies 2 / 3 of the thickness of the overall composite thermally conductive plate, and the thermal insulation layer occupies 1 / 3 of the thickness of the integral composite thermally conductive plate....

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Abstract

The invention discloses a heat dissipation and thermal runway dispersion protection structure in a cell system. The structure comprises a module shell and at least one composite heat-conducting plate, wherein a plurality of unit cells are arranged in the module shell; and the composite heat-conducting plate is positioned in the module shell, is contacted with the module shell, is arranged between at least two unit cells to serve as a transfer medium of heat between a cell and the shell and control the heat transfer between the cells, and has a multilayer anisotropic heat-conducting structure which consists of at least one heat-conducting layer and at least one heat-insulating layer.

Description

technical field [0001] The present invention relates to a battery system, and in particular to a heat dissipation and thermal runaway diffusion protection structure in the battery system. Background technique [0002] The shortage of oil reserves and rising oil prices are problems that the world needs to face, and electric vehicles are currently the best solution. In the United States, California has already legislated to force car dealers to sell a specific ratio of electric vehicles, and other states will follow suit; France, Germany, Switzerland, Japan, etc. have policies that reward and subsidize the use of electric vehicles or technology research and development, and electric vehicles with practical performance The development has also been completed one after another, and it is being gradually promoted in an experimental trial. [0003] Advanced countries such as Europe, the United States, Japan, etc. have paid great attention to the air pollution and the increasing s...

Claims

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Application Information

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IPC IPC(8): H01M10/50H01M10/613H01M10/625H01M10/6555
CPCY02E60/12
Inventor 胡宪霖黄振东翁震灼张金泉叶胜发林炳明彭裕民
Owner IND TECH RES INST
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