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Lithium ion secondary battery having shape memory safety vent

一种二次电池、锂离子的技术，应用在二次电池、电池、电池组零部件等方向，能够解决限制电池安全性等问题，达到安全性提高、运行情况精确、改善安全性的效果

Inactive Publication Date: 2006-03-15
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This limits the improvement of battery safety
[0010] The cell pressure that ruptures the safety vent plug in the thinner area has a larger deviation
In other words, the safety vent may open unnecessarily below a reference temperature or pressure, or fail to open above a reference temperature or pressure

Method used

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  • Lithium ion secondary battery having shape memory safety vent
  • Lithium ion secondary battery having shape memory safety vent
  • Lithium ion secondary battery having shape memory safety vent

Examples

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Embodiment Construction

[0025] In the following description and drawings, the same reference numerals denote the same or similar components, so repeated description of the same or similar components is omitted.

[0026] see now figure 1 , 2 and 3, the lithium ion secondary battery 100 includes: an electrode assembly 110, a can (or casing) 120 for accommodating the electrode assembly 110, an electrolytic solution (not shown) injected into the can 120 to enable movement of lithium ions, and a cover A cap assembly 140 on the can 120 and preventing the electrode assembly 110 and electrolyte from leaking to the outside, wherein the cap assembly 140 has a safety vent 148 adapted to be deformed at a predetermined temperature.

[0027] The electrode assembly 110 includes: a first electrode plate 111 to which a first active material (not shown) is attached, a second electrode plate 112 to which a second active material (not shown) is attached, and The separator 113 between 111 and 112, wherein the separator...

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Abstract

A lithium ion secondary battery has a shape memory safety vent adapted to discharge internal compressed gas by temporarily being opened when the temperature reaches a predetermined level to avoid a swelling phenomenon of the battery and improve safety. The lithium ion secondary battery includes an electrode assembly having first and second electrode plates wound a number of times with a separator interposed between them; a can having an opening formed on a side thereof to contain the electrode assembly; and a cap plate adapted to cover the can and provided with a vent hole on a side thereof, to which a safety vent adapted to deform at a predetermined temperature and discharge gas from inside the can to the exterior is coupled.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefits from Korean Patent Application No. 10-2004-0071415 filed with the Korean Intellectual Property Office on September 7, 2004, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to lithium ion secondary batteries, and more particularly, to lithium ion secondary batteries having a shape memory safety vent adapted to release compressed gas inside. Background technique [0004] A typical lithium-ion secondary battery includes: an electrode assembly consisting of a positive plate to which a positive active material is attached, a negative plate to which a negative active material is attached, and a battery between the positive and negative plates to avoid short circuits and allow only lithium ions to move. a separator wound into a known "jelly roll" structure; an electrolyte for moving lithium ions; a tank for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/12H01M10/40H01M10/05H01M10/0525H01M10/058H01M10/0587H01M50/147
CPCH01M2/1282Y02E60/12H01M2200/10Y02E60/122H01M2/04H01M2/1223H01M10/0587H01M10/0525Y02E60/10H01M50/317H01M50/375Y02P70/50
Inventor 洪懿善郭润泰
Owner SAMSUNG SDI CO LTD
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