The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 07, 2017
Filed:
Aug. 31, 2012
Kouichi Kajiwara, Hitachinaka, JP;
Hayato Koguchi, Hitachinaka, JP;
Takeshi Hizono, Hitachinaka, JP;
Hiroaki Egawa, Hitachinaka, JP;
Kouichi Kajiwara, Hitachinaka, JP;
Hayato Koguchi, Hitachinaka, JP;
Takeshi Hizono, Hitachinaka, JP;
Hiroaki Egawa, Hitachinaka, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Ibaraki, JP;
Abstract
A prismatic secondary battery includes a battery case in a prismatic shape and a battery cover which seals up an opening part of the battery case. The battery cover has a convex part which projects toward the inside of the battery case, faces an inner surface of a side wall part of the battery case, and extends continuously along the entire periphery of the side wall part. Cover thickness of a contact part of the battery cover which is in contact with the upper end of the side wall part of the battery case at a position outside the convex part is greater than ½ of cover thickness of a blockage part blocking up an opening part at a position inside the convex part and is less than the cover thickness of the blockage part.