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1. (WO2018105398) CYLINDRICAL NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

Pub. No.:    WO/2018/105398    International Application No.:    PCT/JP2017/041974
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Thu Nov 23 00:59:59 CET 2017
IPC: H01M 10/0587
H01M 2/26
Applicants: SANYO ELECTRIC CO., LTD.
三洋電機株式会社
Inventors: OKI Yukihiro
沖 雪尋
NAKAO Takaki
中尾 隆希
Title: CYLINDRICAL NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Abstract:
The purpose of the present disclosure is to reduce or prevent the development of wrinkles in a negative electrode core of a metal foil in a configuration of a cylindrical nonaqueous electrolyte secondary battery in which the negative electrode core is exposed on an outermost peripheral surface of a wound electrode body. A nonaqueous electrolyte secondary battery according to an embodiment of the present disclosure comprises: a wound electrode body in which a positive electrode and a negative electrode including a negative electrode core with a negative electrode mixture layer formed thereon are spirally wound via a separator, the negative electrode core being exposed on an outermost peripheral surface and the wound electrode body having a winding-stop tape adhered thereto so as to fix a winding-end portion of the negative electrode to the outermost peripheral surface; and an exterior body in which the wound electrode body and a nonaqueous electrolyte are housed. The winding-end portion of the negative electrode extends in a winding direction from a winding end of the positive electrode. A winding-end portion of the separator extends in the winding direction from the winding end of the negative electrode. The winding-stop tape is affixed to straddle the winding-end portion of the separator.