公开(公告)号：US20240274807A1

公开(公告)日：2024-08-15

申请号：US18567805

申请日：2022-04-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： YUSUKE KAWAHARA ,  KATSUYA MIYAHARA

IPC: H01M4/40 ,  H01M4/02 ,  H01M4/06 ,  H01M4/134 ,  H01M4/48 ,  H01M6/16 ,  H01M10/052 ,  H01M10/0587

CPC classification number: H01M4/405 ,  H01M4/06 ,  H01M4/134 ,  H01M4/483 ,  H01M6/16 ,  H01M10/052 ,  H01M10/0587 ,  H01M2004/021

Abstract: A wound non-aqueous electrolyte battery includes a positive electrode, a negative electrode, a separator provided between the positive and negative electrodes, and a non-aqueous electrolyte. The negative electrode includes a lithium-aluminum alloy sheet. The lithium-aluminum alloy sheet has surfaces including a surface of which parts are flush and connected with one another via grain boundaries of lithium-aluminum alloy. An average grain boundary number N is 8.75 or less, the average grain boundary number N being provided as ΣGi/ΣLi by dividing ΣGi by ΣLi, where ΣGi is a sum of numbers of grain boundaries Gi out of the plurality of grain boundaries which intersect M line segments PQi respectively connecting point Pi to point Qi on the surface of the lithium-aluminum alloy sheet, ΣLi is a sum of lengths Li of the M line segments PQi, M is an integer greater than 1, and i is an integer satisfying 1

公开(公告)号：US20210320307A1

公开(公告)日：2021-10-14

申请号：US17261111

申请日：2019-04-02

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： KEIKO KOSUGE ,  FUMIO KATO ,  TOSHIYUKI SHIMIZU ,  YUSUKE KAWAHARA

IPC: H01M6/16 ,  H01M4/505 ,  H01M4/131 ,  H01M4/134 ,  H01M4/36 ,  H01M4/40 ,  H01M4/06

Abstract: A lithium primary cell includes an electrode group and a non-aqueous electrolytic solution. The electrode group includes a positive electrode, a negative electrode, and a separator, in which the positive electrode and the negative electrode are wound with the separator interposed therebetween. In the electrode group, an area where the positive electrode and the negative electrode face each other is 250 cm2 or more and 350 cm2 or less. The positive electrode includes a positive electrode mixture including manganese dioxide and a boron compound. The negative electrode includes lithium metal or a lithium alloy. The non-aqueous electrolytic solution includes ethylene carbonate. A content of the boron compound in the positive electrode is 0.5 parts by mass or more and 2 parts by mass or less in terms of boron with respect to 100 parts by mass of the positive electrode mixture. A content of the ethylene carbonate in the non-aqueous electrolytic solution is 1 part by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the manganese dioxide.