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公开(公告)号：US11677064B2
公开(公告)日：2023-06-13
申请号：US16771394
申请日：2018-10-26
Inventor： Yuki Tokuda , Hideharu Takezawa , Yuko Ogawa , Hiroyuki Okuda
IPC: H01M4/13 , H01M50/531 , H01M10/0587 , H01M10/0525 , H01M50/586 , H01M50/595 , H01M50/534 , H01M50/536
CPC classification number: H01M4/13 , H01M10/0525 , H01M10/0587 , H01M50/534 , H01M50/536 , H01M50/586 , H01M50/595
Abstract: An electrode group includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a positive electrode lead electrically connected to the positive electrode. The positive electrode includes a positive electrode current collector and a positive electrode active material layer carried on each main surface of the positive electrode current collector. The positive electrode current collector has an exposed section that does not carry the positive electrode active material layer. The negative electrode includes a negative electrode current collector and a negative electrode active material layer carried on each main surface of the negative electrode current collector and has a first region and a second region. The mass of the negative electrode active material layer in the first region per unit area is smaller than the mass of the negative electrode active material layer in the second region per unit area.
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公开(公告)号：US11450852B2
公开(公告)日：2022-09-20
申请号：US16689387
申请日：2019-11-20
Inventor： Hideharu Takezawa , Tomoki Shiozaki
IPC: H01M4/525 , H01M4/36 , H01M4/485 , H01M10/0525 , H01M4/02
Abstract: A positive electrode with a positive electrode current collector and a positive electrode mixture layer, and the positive electrode mixture layer has first and second positive electrode mixture layers. The first positive electrode mixture layer comprises a positive electrode active material composed of compound A that contains Ni, Co, Al and Li. The second positive electrode mixture layer is disposed between the first positive electrode mixture layer and the positive electrode current collector, and comprises a positive electrode active material including: said compound A; and a Li-containing compound B which is smaller in specific capacity (mAh/g) and average particle diameter than said compound A. In said compound A, a ratio of Ni to the total number of moles of the metal elements except Li is 82 mol % or more. The average particle diameter of said compound B is 55% or less of the average particle diameter of said compound A.
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公开(公告)号：US20200099057A1
公开(公告)日：2020-03-26
申请号：US16695920
申请日：2019-11-26
Inventor： Takahito Nakayama , Tomoki Shiozaki , Hideharu Takezawa
Abstract: This secondary battery positive electrode is provided with a positive-electrode current collector, a positive-electrode mixture layer, and an intermediate layer disposed between the positive-electrode current collector and the positive-electrode mixture layer. The intermediate layer comprises: a first intermediate layer that includes a non-oxide conductive inorganic compound and a positive-electrode active material; and a second intermediate layer that includes an insulating inorganic material and a non-oxide conductive inorganic compound. The conductive inorganic compound becomes an insulating oxide at 300° C. or above.
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公开(公告)号：US20200052303A1
公开(公告)日：2020-02-13
申请号：US16659770
申请日：2019-10-22
Inventor： Takahiro Takahashi , Takahito Nakayama , Tomoki Shiozaki , Hideharu Takezawa , Daisuke Furusawa , Yuji Oura
Abstract: Provided is a secondary battery comprising a positive electrode, a negative electrode, and an electrolyte. The positive electrode is provided with a positive electrode collector, a positive electrode mix layer containing positive electrode active substance particles, and an intermediate layer disposed between the positive electrode collector and positive electrode mix layer. The intermediate layer contains a conductor and a cured product of a curable resin having at least one selected from a glycidyl, hydroxy, carboxyl, amino, acryloyl, and methacryloyl groups.
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公开(公告)号：US20200020951A1
公开(公告)日：2020-01-16
申请号：US16582347
申请日：2019-09-25
Inventor： Daisuke Furusawa , Tomoki Shiozaki , Hideharu Takezawa , Takahito Nakayama , Yuji Oura , Takahiro Takahashi
IPC: H01M4/62 , H01M4/131 , H01M4/66 , H01M10/0525 , H01M10/0587
Abstract: According to the present invention, a positive electrode is provided with: a positive electrode current collector which contains aluminum; a positive electrode mixture layer which contains a positive electrode active material that is configured of a lithium transition metal oxide; and an intermediate layer which is arranged between the positive electrode current collector and the positive electrode mixture layer. The intermediate layer contains inorganic compound particles, a conductive material and a binder; the circularity is from 5% to 75% (inclusive); the void fraction of the intermediate layer is from 30% to 69% (inclusive); and the average circularity of the inorganic compound particles is from 5% to 75% (inclusive).
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Patent Agency Ranking
公开(公告)号：US20230275208A1
公开(公告)日：2023-08-31
申请号：US18140877
申请日：2023-04-28
Inventor： Yuki Tokuda , Hideharu Takezawa , Yuko Ogawa , Hiroyuki Okuda
IPC: H01M4/13 , H01M10/0525 , H01M10/0587 , H01M50/586 , H01M50/595 , H01M50/534 , H01M50/536
CPC classification number: H01M4/13 , H01M10/0525 , H01M10/0587 , H01M50/586 , H01M50/595 , H01M50/534 , H01M50/536
Abstract: An electrode group includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a positive electrode lead electrically connected to the positive electrode. The positive electrode includes a positive electrode current collector and a positive electrode active material layer carried on each main surface of the positive electrode current collector. The positive electrode current collector has an exposed section that does not carry the positive electrode active material layer. The negative electrode includes a negative electrode current collector and a negative electrode active material layer carried on each main surface of the negative electrode current collector and has a first region and a second region. The mass of the negative electrode active material layer in the first region per unit area is smaller than the mass of the negative electrode active material layer in the second region per unit area.
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公开(公告)号：US11545721B2
公开(公告)日：2023-01-03
申请号：US16771053
申请日：2018-10-26
Inventor： Yuko Ogawa , Hideharu Takezawa , Yuki Tokuda , Hiroyuki Okuda
IPC: H01M50/449 , H01M50/46 , H01M4/133 , H01M4/134 , H01M4/38 , H01M4/48 , H01M4/583 , H01M4/62 , H01M10/04 , H01M10/0525 , H01M10/0587
Abstract: A secondary battery includes an electrode assembly including a positive electrode, a negative electrode, a first separator disposed on one side of the surface of the negative electrode and having a thickness T1, and a second separator disposed on the other side of the surface of the negative electrode and having a thickness T2. The thickness T2 of the second separator is larger than the thickness T1 of the first separator. The first separator includes a first porous film having a porosity P1, and the second separator includes a second porous film having a porosity P2. At least one of the first separator and the second separator includes a heat resistant layer. The positive electrode, the first separator, the negative electrode and the second separator are wound together such that the first separator is arranged on the outer side and the second separator is arranged on the inner side.
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公开(公告)号：US11437613B2
公开(公告)日：2022-09-06
申请号：US16733615
申请日：2020-01-03
Inventor： Takahiro Takahashi , Hideharu Takezawa , Tomoki Shiozaki
Abstract: This secondary battery positive electrode includes: a positive electrode current collector; an intermediate layer provided on the positive electrode current collector; and a positive electrode mixture layer provided on the intermediate layer and including a positive electrode active material, wherein the intermediate layer includes a conductive material, a metal phosphate, and an inorganic compound which is not a metal phosphate and has a lower oxidizing power than the positive electrode active material.
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公开(公告)号：US20210376391A1
公开(公告)日：2021-12-02
申请号：US17282094
申请日：2019-09-24
Inventor： Hiroyuki Okuda , Hideharu Takezawa , Yuko Ogawa , Yuki Tokuda
IPC: H01M10/0587 , H01M50/531 , H01M4/505 , H01M4/525 , H01M4/36 , H01M4/48 , H01M4/587 , H01M50/183
Abstract: The cylindrical secondary battery is provided with a wound electrode body, a positive electrode tab connected to a positive electrode, a cylindrical case body for housing the electrode body and the positive electrode tab, and a sealing body for sealing an opening of the case body. A negative electrode has, at a winding end of the negative electrode, a negative electrode current collector exposure section where no negative electrode active material layer is disposed, and the negative electrode current collector exposure section is disposed in contact with an inner surface of the case body. The positive electrode tab is disposed at the center in the longitudinal direction of the positive electrode and in a region where the number of layers of the positive electrode in a radial direction is smaller than in other regions in a cross-sectional area of the wound electrode body.
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公开(公告)号：US20200303708A1
公开(公告)日：2020-09-24
申请号：US16771053
申请日：2018-10-26
Inventor： Yuko Ogawa , Hideharu Takezawa , Yuki Tokuda , Hiroyuki Okuda
IPC: H01M2/16 , H01M10/04 , H01M10/0525 , H01M10/0587 , H01M4/38 , H01M4/134 , H01M4/48 , H01M4/583 , H01M4/133 , H01M4/62
Abstract: A secondary battery includes an electrode assembly including a positive electrode, a negative electrode, a first separator disposed on one side of the surface of the negative electrode and having a thickness T1, and a second separator disposed on the other side of the surface of the negative electrode and having a thickness T2. The thickness T2 of the second separator is larger than the thickness T1 of the first separator. The first separator includes a first porous film having a porosity P1, and the second separator includes a second porous film having a porosity P2. At least one of the first separator and the second separator includes a heat resistant layer. The positive electrode, the first separator, the negative electrode and the second separator are wound together such that the first separator is arranged on the outer side and the second separator is arranged on the inner side.
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