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:
Mar. 05, 2019
Filed:
Jan. 23, 2012
Yoshitaka Kawada, Tokyo, JP;
Tetsuo Sakai, Tokyo, JP;
Natsuki Toyota, Takasaki, JP;
Naotada Okada, Yokohama, JP;
Susumu Yahagi, Yokohama, JP;
Yoshitaka Kawada, Tokyo, JP;
Tetsuo Sakai, Tokyo, JP;
Natsuki Toyota, Takasaki, JP;
Naotada Okada, Yokohama, JP;
Susumu Yahagi, Yokohama, JP;
Toshiba Corporation, Tokyo, JP;
Abstract
A secondary battery according to an embodiment includes a container having a pouring hole through which an electrolyte is poured, and housing the electrolyte, poured through the pouring hole, together with an electrode body; and a sealing lid which is fixed to the container and is closing the pouring hole. The sealing lid has a welding mark existing in a ring shape with a depth through the sealing lid to a lid body of the container, and an inner circumferential side molten mark existing in a ring shape overlapping with the welding mark, on the inner circumferential side of the welding mark in the sealing lid, with a depth corresponding to the thickness of the sealing lid.