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:
Sep. 22, 2015
Filed:
Aug. 23, 2013
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Hideaki Morishima, Kashiwazaki, JP;
Takashi Kobayashi, Kashiwazaki, JP;
Masaomi Nakahata, Kamakura, JP;
Kazuhiko Mori, Tokyo, JP;
KABUSHIKI KAISHA TOSHIBA, Minato-ku, JP;
Abstract
According to one embodiment, there is provided a nonaqueous electrolyte secondary battery. A positive electrode current collector comprises a coated portion on which the positive electrode active material layer is provided and a noncoated portion which is adjacent to the coated portion in a direction parallel to the first surface, in which the positive electrode active material layer is not present. A density of the positive electrode active material layer is within a range of 3.1 g/cc to 3.4 g/cc. A ratio W1/W2 of a mass of the coated portion per unit area (W1) to a mass of the noncoated portion per unit area (W2) is from 0.997 to 1.