Rubber molded body and battery pack

A technology of rubber molding and silicone rubber composition, which is applied to battery pack parts, secondary batteries, battery covers/end covers, etc., can solve problems such as extended burning, battery burnout, and thermal runaway of lithium-ion secondary batteries, etc., to achieve Effects of suppressing overheating and suppressing flame spread

Pending Publication Date: 2021-11-26
MITSUBISHI MATERIALS CORP
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specifically, for example, in the case of a fireproof sheet made of fiber as described in Patent Document 1, the mesh of the fiber is expanded due to the high pressure of the gas, and in the case of a fireproof sheet made of resin, In the softened state of the resin before reaching the burning state, the fireproof sheet is reduced to a strength that cannot withstand the high pressure and burns through. Therefore, in any case, there is a risk that the fireproof sheet will have a through hole

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
  • Rubber molded body and battery pack
  • Rubber molded body and battery pack
  • Rubber molded body and battery pack

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] Hereinafter, embodiments of the present invention will be described in detail.

[0041] figure 1 A perspective view of a lithium ion secondary battery core attached to a rubber molded body according to an embodiment of the present invention.

[0042] The lithium ion secondary battery is a prismatic battery cell core 1 is provided with a positive electrode terminal 3 and negative electrode terminal 4 on the surface of the can as the battery container 2, and a relief valve 5 is provided therebetween.

[0043] In the case of a lithium ion secondary battery cell 1 thermal runaway increase in internal pressure, the safety valve 5 is actuated to prevent the discharge temperature / high-pressure gas tank 2 caused by rupture of the package.

[0044] In the case of a lithium ion secondary battery cell 1 thermal runaway there is a risk of fire due to overheating, the safety valve 5 when ejected from the high-temperature / high-pressure gas immediately wide spread, it is difficult to...

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

No PUM Login to view more

Abstract

The invention relates to a rubber molded body, which is attached to the outer periphery of more than one lithium ion secondary battery cell having a safety valve or an exhaust hole so as to cover at least the safety valve or the exhaust hole, wherein: the thermal conductivity (measurement temperature: 33 DEG C), of the rubber molded body, measured by a steady state comparative-longitudinal heat flow method in accordance with JIS H7903: 2008 is less than 1.0 W/m.K; the thickness of a portion that covers the safety valve or the exhaust hole is 0.3-10.0 mm; and the hardness of the surface measured by a Type A durometer on the basis of JIS K6253 is 50-90.

Description

technical field [0001] The present invention relates to a rubber molded body obtained by molding and curing a rubber composition, and a battery pack including a lithium ion secondary battery core provided with the rubber molded body. Background technique [0002] In recent years, the demand for lithium ion secondary batteries (hereinafter sometimes referred to as "batteries") has increased. On the other hand, with the development of miniaturization and higher energy density (energy density of 300Wh / kg or more), there is a risk of high temperature due to heat generation depending on the usage method. Therefore, the safety of the cell or battery pack becomes more important. [0003] For example, lithium-ion secondary batteries are at risk of thermal runaway if they are overcharged or overdischarged, or internally or externally short-circuited due to accidental impact. A lithium-ion secondary battery in which thermal runaway occurs generates gas to increase the internal press...

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): C08L83/04C08K3/36C08K3/34C08K3/22C08K9/06H01M50/124H01M50/325H01M50/383
CPCC08K3/36C08K3/34C08K3/22C08K9/06H01M50/325H01M50/383H01M50/124C08K2003/2241C08L83/04H01M50/271H01M50/231H01M50/218H01M50/209H01M10/0525Y02E60/10H01M50/273H01M50/282C08K2003/2237
Inventor 芦田桂子厨子敏博
Owner MITSUBISHI MATERIALS CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap