SEALED CELL

WIPO Patent Application WO/2013/065125

A1

A sealed cell having a cleavage groove formed in the side surface of a cell case in which an electrode body and an electrolytic solution are sealed, wherein the cleavage groove does not cleave readily despite impact from falling or the like, and the cleavage groove cleaves safely and reliably. A sealed cell (1) is provided with a columnar cell case (2) inside of which an electrode body (30) and an electrolytic solution are sealed. Formed in a planar part (13) of the cell case (2) is a cleavage groove (41) for configuring a cleavage line that intersects with a ridge line (L) formed in the planar part (13) of the cell case (2) when the cell case (2) expands due to an increase in internal pressure. The cleavage line is a curved line in which a first curved part (42), curved into a protrusion in one direction, and a second curved part (43), curved into a protrusion in a direction that forms an angle of at least 90 degrees with the protruding direction of the first curved part (42), are connected in reciprocal manner in a side view. The first curved part (42) and/or the second curved part (43) intersects the ridge line (L).

YAMAMOTO MAYUMI (JP)
MAESONO HIROSHI (JP)
WATARI SOICHI (JP)
ISA AKINO (JP)

PCT/JP2011/075181

May 10, 2013

November 01, 2011

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HITACHI MAXELL (JP)
YAMAMOTO MAYUMI (JP)
MAESONO HIROSHI (JP)
WATARI SOICHI (JP)
ISA AKINO (JP)

H01M2/12; H01M2/02

JP2004039294A	2004-02-05
JP2004079330A	2004-03-11
JP2005038773A	2005-02-10
JP2001345083A	2001-12-14
JP2001143664A	2001-05-25
JP2001307707A	2001-11-02
JP2002367583A	2002-12-20
JP2011192550A	2011-09-29
JP2006216435A	2006-08-17

UEBA Hidetoshi et al. (JP)
Hidetoshi Ueha (JP)

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