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. 24, 2019
Filed:
Nov. 27, 2014
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Yukiyoshi Ueno, Toyota, JP;
Tomoyuki Mizuno, Toyota, JP;
Kunimitsu Yamamoto, Toyota, JP;
Junko Ohira, Toyota, JP;
Kaoru Inoue, Hirakata, JP;
Hideaki Fujita, Kyotanabe, JP;
Hideki Sano, Ikeda, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi-ken, JP;
Abstract
A lithium-ion secondary battery () includes a wound electrode body (), a nonaqueous electrolyte, and a box-shaped case (). The wound electrode body includes a positive electrode (), a negative electrode (), and a separator (). The box-shaped case contains the wound electrode body and the nonaqueous electrolyte. The wound electrode body includes a starting-end-side negative electrode remainder portion () provided in a winding-direction starting end portion () of the wound electrode body. The winding-direction starting end portion exists at a winding center side. The starting-end-side negative electrode remainder portion protrudes toward the winding center side along a winding direction beyond the positive electrode. A surplus nonaqueous electrolyte exists in a gap between the wound electrode body and the box-shaped case. The starting-end-side negative electrode remainder portion is positioned in a region where the surplus nonaqueous electrolyte exists, when the lithium-ion secondary battery is disposed in a predetermined posture.