Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF4 Cites 53 Cited by
  • 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 temperature and overheating of batteries in the module, and improves the cycle life of lithium battery packs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

no. 1 example

[0064] The following presents a first embodiment according to the present invention, regarding a heat dissipation and thermal runaway diffusion protection structure in a battery system (such as figure 2 shown), to block the thermal runaway spread of the battery and provide heat dissipation for the battery pack.

[0065] Please refer to figure 2 , the heat dissipation and thermal runaway diffusion protection structure of this embodiment includes a battery pack (module) casing 200 and a plurality of composite heat conducting plates 210 . A plurality of unit cells (unit cells) 202 are generally disposed in the battery pack case 200 , and only a part of the battery pack case 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 and contacts the battery pack casing 200 , and is placed between at least two unit cells 202 . exist figure 2 Among them, the composite heat conduction plate ...

experiment example 1

[0095] Simulate a structure similar to the first embodiment (such as Figure 8 ), which takes a square lithium battery as an example, simulating in a battery pack composed of lithium batteries 800a~g, after adding a composite heat conducting plate 802 for heat conduction and heat insulation, the battery pack protects a single lithium battery 800a from heat Efficacy of uncontrolled spread. Taking current lithium batteries as an example, the thermal runaway reaction initiation temperature (ie, SEI) of the self-heating thermal runaway reaction initiation temperature is about 80-90°C, and the thermal runaway critical temperature 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 the most commonly used thickness of square aluminum foil pack batteries at present), and the surface size of the simulated battery 800a-g is 10cm×13cm, The simulation is performed with a height of 13cm. As for the simulate...

experiment example 2

[0103] Simulate a structure similar to the third embodiment (such as Figure 10 ), wherein the size of the lithium batteries 1000a-g is the same as that of the simulation experiment example 1. The simulated composite heat conduction plate 1002 is a three-layer structure composed of two heat conduction layers 1004 sandwiching a heat insulation layer 1006 . The material, thickness and thermal conductivity of each heat conducting layer 804 and heat insulating layer 806 are the same as those of simulation experiment 1, that is, the total thickness of the heat conducting layer is 0.2 cm, and the thickness of the heat insulating layer is 0.1 cm. The thermal conduction layer of the composite heat conduction plate 1002 accounts for 2 / 3 of the thickness of the overall composite heat conduction plate, and the heat insulation layer accounts for 1 / 3 of the thickness of the overall composite heat conduction plate. According to the equation in the simulation experiment example 1, the compos...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thermal conductivityaaaaaaaaaa
Thermal conductivityaaaaaaaaaa
Thermal conductivityaaaaaaaaaa
Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products