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Secondary battery pouch having improved stability, pouch-type secondary battery using same, and medium- or large-sized battery pack

A secondary battery and battery shell technology, applied to large-size batteries/battery packs, small-size batteries/battery packs, battery pack components, etc., can solve problems such as battery internal temperature and pressure rise, battery explosion, etc. Achieves effects of improved service life and safety, easy shape, and reduced manufacturing cost and weight

Active Publication Date: 2013-05-01
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The internal temperature and Pressure could rise, causing the battery to explode

Method used

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  • Secondary battery pouch having improved stability, pouch-type secondary battery using same, and medium- or large-sized battery pack
  • Secondary battery pouch having improved stability, pouch-type secondary battery using same, and medium- or large-sized battery pack
  • Secondary battery pouch having improved stability, pouch-type secondary battery using same, and medium- or large-sized battery pack

Examples

Experimental program
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Effect test

Embodiment Construction

[0074] A secondary battery pack according to the present invention includes a pouch-type battery case.

[0075] The pouch type battery case includes: a cavity portion for accommodating an electrode assembly; an upper battery case; a lower battery case; and a sealing member for sealing the upper battery case and the lower battery case, wherein each of the upper battery case and the lower battery case One has a foldable structure formed by bending a dummy portion at least once, and the dummy portion is arranged in a protruding direction of an electrode lead of the electrode assembly.

[0076] Exemplary embodiments will be described more fully hereinafter with reference to the accompanying drawings; however, they may be embodied in different forms and should not be construed as limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled ...

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Abstract

The present invention relates to a pouch-type secondary battery having improved stability, and more particularly to a pouch-type secondary battery which is designed such that the shape of the pouch is changeable to disconnect the connection parts between an electrode lead and an electrode tab when the internal pressure of the pouch rises due to excessive charging or the like, and a battery pack including the same. The present invention can significantly increase the lifetime and stability of a pouch-type secondary battery, without the need for additional materials, devices, or the like in the manufacturing of the secondary battery, by fundamentally interrupting the current flow when gas is generated in the secondary battery, and the present invention can provide a pouch-type secondary battery capable of being low cost, light weight, and a battery that is easily changeable in shape, etc.

Description

technical field [0001] This application claims the benefit of Korean Patent Application No. 10-2010-0075468 filed on August 5, 2010 and Korean Patent Application No. 10-2011-0050759 filed on May 27, 2011, the entire contents of which are hereby incorporated by reference into this application. [0002] The invention disclosed herein relates to a pouch with improved safety, a secondary battery including the pouch, and a battery pack. Background technique [0003] As the demand and technology of mobile devices increase, the demand and technology of secondary batteries as energy sources for mobile devices also increase. Among such secondary batteries, lithium secondary batteries having high energy density and high discharge voltage have been remarkably advanced and commercialized. [0004] According to the structure of an electrode assembly including a positive electrode, a separator, and a negative electrode, secondary batteries can be classified into: Wrapped (winding) elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M2/08H01M2/34H01M50/105H01M50/536
CPCH01M2220/20Y02E60/12H01M2/0237H01M2/1247H01M2/345H01M2/263H01M10/052H01M2/0207Y02T10/7011H01M2/0287Y02E60/10H01M50/124H01M50/383H01M50/578Y02P70/50H01M50/105H01M50/536H01M50/538H01M50/178H01M50/557H01M50/198H01M2200/20H01M2300/0082
Inventor 赵承洙尹柔琳崔丞惇全浩辰崔大植权大弘
Owner LG ENERGY SOLUTION LTD
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