SECONDARY BATTERY - NISSAN MOTOR

Title:

SECONDARY BATTERY

Document Type and Number:

WIPO Patent Application WO/2012/066863

Kind Code:

A1

Abstract:

The present invention relates to a secondary battery in which a stacked electrode assembly (20) having a cathode, an anode, and a separator (22) is accommodated together with an electrolytic solution in an exterior member (30). There is known a technique for joining the external periphery of the separator together with the seal of the exterior member in the secondary battery in order to prevent shifting in the stacked electrode assembly, but a problem with such a technique is that no measures aimed at maintaining battery performance have been taken to replenish the electrolytic solution in the stacked electrode assembly or to prevent fractures from originating in a bonded part formed in the external periphery of the separator. The present invention solves this problem by providing a secondary battery having a plurality of joined parts (40) in which the external peripheral part of the separator is joined with the exterior member, and also having holding parts (50) for holding the electrolytic solution, the holding parts being formed at least between the joined parts, and the total of the peripheral lengths of the joined parts is greater than the length of the periphery of a rectangle that encompasses all of the joined parts and has the minimum surface area.

Inventors:

TERADO MIYUKI

Application Number:

PCT/JP2011/072985

Publication Date:

May 24, 2012

Filing Date:

October 05, 2011

Export Citation:

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Assignee:

NISSAN MOTOR (JP)
TERADO MIYUKI

International Classes:

H01M10/04; H01M10/0585; H01M50/105; H01M50/682; H01M50/211

Foreign References:

JP2003092092A	2003-03-28
JP2007250319A	2007-09-27
JP2008084666A	2008-04-10
JP2010027368A	2010-02-04
JP2010153140A	2010-07-08
JP2002252036A	2002-09-06
JPH11250873A	1999-09-17

Other References: