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Secondary battery and method for manufacturing the same

A technology for secondary batteries and battery shells, which is applied in the manufacture of secondary batteries, secondary batteries, electrolyte storage batteries, etc., can solve the problems of heating, ignition or explosion of secondary batteries, damage to electrode assemblies 10, etc., and improve safety. , the effect of preventing damage

Active Publication Date: 2014-10-08
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the electrode assembly 10 moves, the electrode tab 11, the electrode lead 12 and its connection parts will be damaged, and the electrode assembly 10 itself will be damaged.
[0010] In addition, when the electrode tab 11 is cut due to the movement of the electrode assembly 10, the cut portion may come into contact with the electrode plate of the opposite polarity to cause an internal short circuit, which in this case causes serious problems such as Accidents of heat generation, fire or explosion of secondary batteries

Method used

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  • Secondary battery and method for manufacturing the same
  • Secondary battery and method for manufacturing the same
  • Secondary battery and method for manufacturing the same

Examples

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Embodiment

[0080] An electrolyte was prepared in which 1M LiPF 6 Dissolve in organic solvents including EC, PC and DEC and add VC, PS, FA and NA thereto, and then add PVDF-HFP as polymer particles to the obtained polymer particles in such a way that the content of the polymer particles is 10% by weight. The prepared electrolyte, from which the polymer slurry was prepared. In addition, the prepared polymer slurry was injected into a battery case accommodating the electrode assembly therein, followed by sealing, and the prepared battery case was heated at 85° C. for 2.5 hours. In this case, a pressure of 0.5 Nm was applied to the battery case using a jig press during heating. Subsequently, the heated battery case was cooled at room temperature, followed by degassing and resealing, thereby manufacturing a secondary battery according to the example.

[0081] Regarding the secondary battery manufactured according to the examples, a 3-point bending test was performed at room temperature at a...

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Abstract

Provided is a secondary battery with improved safety through filling a polymer in a hardened state, and a method of manufacturing the same. The method of manufacturing a secondary battery according to the present disclosure includes preparing a polymer slurry by adding a polymer particle to an electrolyte solution, injecting the polymer slurry to a battery casing in which an electrode assembly is received, changing the polymer slurry to a polymer solution by heating the battery casing, and hardening the polymer solution by cooling the battery casing.

Description

technical field [0001] The present invention relates to a technique for manufacturing a secondary battery, and more particularly to a secondary battery and a method of manufacturing the same, in which mechanical safety can be improved by containing a polymer in a solid or gel state and an electrolyte in a liquid state in a battery case performance and prevent short circuiting of the electrode assembly. [0002] This application claims the benefit of Korean Patent Application No. 10-2012-0056800 filed in Korea on May 29, 2012 and Korean Patent Application No. 10-2013-0061010 filed in Korea on May 29, 2013, which are hereby incorporated by reference The content is incorporated herein. Background technique [0003] In general, secondary batteries are designed in a rechargeable manner different from disposable primary batteries, and have a wide range of applications such as: electronic devices including mobile phones, laptop computers, and camcorders; electric vehicles, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/60H01M50/178H01M50/55
CPCH01M2/0212H01M10/058H01M10/0567H01M10/4235H01M2/021H01M2300/0085H01M10/0436H01M10/0565Y10T29/49115H01M10/0585H01M50/178H01M50/55Y02E60/10Y02P70/50H01M10/42
Inventor 郑二宪李灿燮安谆昊姜景元金基雄
Owner LG ENERGY SOLUTION LTD
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