US 9,812,687 B2
Electric storage device
Syun Ito, Kyoto (JP); Shogo Tsuruta, Kyoto (JP); and Seiichi Irie, Kyoto (JP)
Assigned to GS YUASA INTERNATIONAL LTD., Kyoto-Shi, Kyoto (JP)
Filed by GS Yuasa International Ltd., Kyoto-shi (JP)
Filed on Aug. 26, 2015, as Appl. No. 14/836,148.
Application 14/836,148 is a continuation of application No. 13/767,130, filed on Feb. 14, 2013, granted, now 9,147,867.
Claims priority of application No. 2012-029677 (JP), filed on Feb. 14, 2012; and application No. 2012-288296 (JP), filed on Dec. 28, 2012.
Prior Publication US 2015/0364736 A1, Dec. 17, 2015
Int. Cl. H01M 2/12 (2006.01)
CPC H01M 2/1241 (2013.01) [H01M 2/12 (2013.01); H01M 2/1288 (2013.01); H01M 2200/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electric storage device comprising:
an electrode assembly;
a case holding the electrode assembly therein, the case including:
a container;
a lid formed in an opening of the container and including a long side and a short side; and
a gas exhausting portion comprising a safety valve formed in the lid, the safety valve being configured to open to exhaust internal gas when an internal pressure reaches a specific level; and
a sealing member formed on an outer surface of the lid, the sealing member including a short side which is adjacent to the short side of the lid, and a long side which is adjacent to the long side of the lid, and the sealing member including a protective portion formed over the gas exhausting portion, the protective portion comprising a perforation,
wherein, in a plan view of the lid, the perforation terminates within the protective portion of the sealing member.
 
15. An electric storage device comprising:
an electrode assembly;
a case holding the electrode assembly therein, the case including:
a container;
a lid formed in an opening of the container and including a long side and a short side; and
a gas exhausting portion comprising a safety valve formed in the lid, the safety valve being configured to open to exhaust internal gas when an internal pressure reaches a specific level; and
a rectangular-shaped sealing member formed on an outer surface of the lid, the sealing member including a short side which is adjacent to the short side of the lid, and a long side which is adjacent to the long side of the lid, and the sealing member further comprising:
a protective portion formed over the gas exhausting portion, the protective portion comprising a perforation that extends substantially parallel to the short side of the sealing member; and
an adhesive portion which is bonded by adhesive to the outer surface of the lid on opposing sides of the protective portion in a direction of the long side of the sealing member,
wherein, in a plan view of the lid, the perforation terminates within the protective portion of the sealing member.