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    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    1.
    发明公开
    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY 审中-公开

    公开(公告)号：EP4443594A1

    公开(公告)日：2024-10-09

    申请号：EP22901189.5

    申请日：2022-11-25

    Applicant: Panasonic Energy Co., Ltd.

    Inventor： SHIMA, Kengo ,  MIZUKOSHI, Fumikazu ,  MIZAWA, Atsushi

    IPC: H01M10/0587 ,  H01M4/131 ,  H01M10/052 ,  H01M10/0566 ,  H01M50/538 ,  H01M50/586 ,  H01M50/595

    CPC classification number: Y02E60/10 ,  Y02P70/50 ,  H01M10/0587 ,  H01M10/052 ,  H01M10/0566 ,  H01M50/595 ,  H01M50/586 ,  H01M50/538 ,  H01M4/131

    Abstract: A nonaqueous electrolyte secondary battery according to one embodiment of the present disclosure is provided with: an electrode body that is obtained by winding a first electrode and a second electrode, which are different from each other in polarity, with a separator being interposed therebetween; an electrolyte solution; and a cylindrical outer package can in which the electrode body and the electrolyte solution are contained. The first electrode comprises a collector and a mixture layer that is formed on at least a part of the surface of the collector; the surface of the first electrode is provided with a plurality of exposure parts, in which the collector is exposed, in the longitudinal direction; the plurality of exposure parts are in contact with only one of both edges of the first electrode in the width direction; a plurality of tabs are respectively connected to the exposure parts and are led out from one edge; a plurality of protection members respectively cover the exposure parts, the tabs, and portions of the mixture layer exposed in the exposure parts in the width direction; and the plurality of covered portions, in which the mixture layer is covered by the protection members, do not overlap with each other in the width direction.

    POSITIVE ELECTRODE FOR SECONDARY BATTERY, AND SECONDARY BATTERY
    7.
    发明公开
    POSITIVE ELECTRODE FOR SECONDARY BATTERY, AND SECONDARY BATTERY 审中-实审

    公开(公告)号：EP4411855A1

    公开(公告)日：2024-08-07

    申请号：EP22876170.6

    申请日：2022-09-27

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： YAMAMOTO, Rina ,  UKA, Youichirou ,  KATO, Yoshio

    IPC: H01M4/13 ,  H01M4/36 ,  H01M10/052 ,  H01M10/0566

    CPC classification number: H01M4/13 ,  H01M10/052 ,  H01M10/0566 ,  H01M4/36 ,  Y02E60/10

    Abstract: A positive electrode for a secondary battery including a positive electrode current collector, and a positive electrode mixture layer containing a positive electrode active material and disposed on a surface of the positive electrode current collector in which the positive electrode mixture layer contains a first positive electrode active material having a compressive strength of 400 MPa or less, a second positive electrode active material having a compressive strength smaller than the compressive strength of the first positive electrode active material, and when the positive electrode mixture layer is zoned into a first region and a second region having the same thickness, the first positive electrode active material is contained more in the first region than in the second region, and the second positive electrode active material is contained more in the second region than in the first region is used.

    POSITIVE ELECTRODE FOR SECONDARY BATTERIES, AND SECONDARY BATTERY
    8.
    发明公开
    POSITIVE ELECTRODE FOR SECONDARY BATTERIES, AND SECONDARY BATTERY 审中-实审

    公开(公告)号：EP4398331A1

    公开(公告)日：2024-07-10

    申请号：EP22864088.4

    申请日：2022-07-20

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： MATSUI, Tooru ,  ASAKA, Keisuke ,  SUZUKI, Hirotetsu ,  SAKATA, Motohiro ,  NAKURA, kensuke

    IPC: H01M4/131 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/66 ,  H01M10/052 ,  H01M10/0566

    CPC classification number: Y02E60/10 ,  H01M10/052 ,  H01M10/0566 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/66 ,  H01M4/131

    Abstract: A positive electrode for a secondary battery include a positive electrode current collector 11, and a positive electrode mixture layer provided on a surface of the positive electrode current collector, wherein the positive electrode mixture layer includes a first layer 12A making contact with the positive electrode current collector and a second layer 12B making contact with the first layer. The first layer 12A includes first positive electrode active material particles with a particle diameter L. The second layer 12B includes second positive electrode active material particles with a particle diameter R. The third positive electrode active material particles with a particle diameter r are included at at least an interface between the first layer and the second layer. The first positive electrode active material particles include a lithium transition metal composite oxide with a ratio of Co in metal element atoms other than Li of 2 atom% or more. The second and third positive electrode active material particles include a lithium transition metal composite oxide that does not include Co, or with a ratio of Co in metal element atoms other than Li of less than 2 atom%. The particle diameter of the first to third positive electrode active material particles satisfy R > L > r.

    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    9.
    发明公开
    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY 审中-实审

    公开(公告)号：EP4379895A1

    公开(公告)日：2024-06-05

    申请号：EP22849084.3

    申请日：2022-06-23

    Applicant: Panasonic Energy Co., Ltd.

    Inventor： SUGII, Noriko ,  TANIGAWA, Kei

    IPC: H01M10/0587 ,  H01M10/0566 ,  H01M50/443 ,  H01M50/446 ,  H01M50/451 ,  H01M50/46 ,  H01M50/548

    CPC classification number: Y02P70/50 ,  Y02E60/10 ,  H01M10/0587 ,  H01M10/0566 ,  H01M50/446 ,  H01M50/451 ,  H01M50/443 ,  H01M50/548 ,  H01M50/46

    Abstract: Provided is a non-aqueous electrolyte secondary battery that has improved cycle characteristics. A non-aqueous electrolyte secondary battery, which is one aspect of the present disclosure, comprises: a wound electrode body in which a positive electrode and a negative electrode are wound, with a first separator that is disposed on the winding inner side of the positive electrode and a second separator that is disposed on the winding outer side of the positive electrode being interposed therebetween; an electrolytic solution; and an exterior body which accommodates the electrode body and the electrolytic solution, wherein the first separator has a first base material layer and a first coating layer that is formed on the surface of the first base material layer which faces the positive electrode, the second separator has a second base material layer and a second coating layer that is formed on the surface of the second base material layer which faces the positive electrode, the first coating layer and the second coating layer each include a filler and an organic material, and the content of the filler in the first coating layer is higher than the content of the filler in the second coating layer.

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