公开(公告)号：US20210043885A1

公开(公告)日：2021-02-11

申请号：US16977051

申请日：2019-03-22

Applicant: TDK CORPORATION

Inventor： Takamasa MINAMI ,  Kazuma AKIMOTO ,  Hideaki SEKI

IPC: H01M2/02 ,  H01M2/30 ,  H01M10/058

Abstract: A non-aqueous electrolyte secondary battery in which a potential of a metal layer in an exterior body is kept noble, and corrosion can be suppressed, including: a power generation element wherein a positive electrode and a negative electrode are opposed to each other with a separator interposed therebetween, and the negative electrode is disposed on an outer side than the positive electrode; and an exterior body which covers the power generation element, and has a metal layer and a resin layer which covers both surfaces of the metal layer, and an average thickness t1 of a first part of the exterior body which covers upper and lower surfaces of the power generation element in a lamination direction of the power generation element and an average thickness t2 of a second part of the exterior body which covers side surfaces of the power generation element satisfy a relationship of t2/t1

公开(公告)号：US20200235350A1

公开(公告)日：2020-07-23

申请号：US16635496

申请日：2019-03-22

Applicant: TDK CORPORATION

Inventor： Takamasa MINAMI ,  Kazuma AKIMOTO ,  Hideaki SEKI

IPC: H01M2/02 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2/16 ,  H01M2/30 ,  H01M4/13 ,  H01M10/0563

Abstract: A non-aqueous electrolytic liquid secondary battery wherein a potential of a metal layer in an exterior body is kept high, and corrosion can be suppressed, wherein an average thickness t1 of a first part of an exterior body covering a first side surface where a negative and a positive electrode terminal of a power generation element exist is different from an average thickness t2 of a second part of the exterior body covering a second side surface that intersects the first. In plan view of the power generation element from a lamination direction, in a second direction orthogonal to a first direction in which the electrode terminals extend, the relationship of t1 t2 is satisfied when the width of the negative electrode is smaller than the positive.