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:
Apr. 26, 2005
Filed:
Feb. 08, 2001
Akio Enomoto, Nagoya, JP;
Kenji Kawamura, Nagoya, JP;
Kenshin Kitoh, Nagoya, JP;
Toshihiro Yoshida, Nagoya, JP;
Akio Enomoto, Nagoya, JP;
Kenji Kawamura, Nagoya, JP;
Kenshin Kitoh, Nagoya, JP;
Toshihiro Yoshida, Nagoya, JP;
NGK Insulators, Ltd., Nagoya City, JP;
Abstract
A lithium secondary battery includes a cylindrical battery case provided with electrode caps at both end portions thereof. An electrode body impregnated with a nonaqueous electrolyte solution is contained in the battery case and includes a positive electrode, a negative electrode, and a separator, with the positive electrode and the negative electrode being wound or laminated through the separator. An elastic body is disposed between the battery case and the electrode caps, with portions in which the battery case contacts the elastic body being brought into press-contact to form a caulked portion to seal the battery case. R(mm) is a diameter of a body part of the battery case and R(mm) is a diameter of the caulked portion, wherein Rand Rfulfill a relationship of R>R.