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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：US20230170528A1
公开(公告)日：2023-06-01
申请号：US17921181
申请日：2021-02-25
Inventor： Takao Sato , Makoto Akutsu , Yuko Ogawa
IPC: H01M10/0567 , H01M4/525 , H01M4/505
CPC classification number: H01M10/0567 , H01M4/525 , H01M4/505 , H01M2004/028
Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode including a positive electrode active material, a separator, a negative electrode facing the positive electrode with the separator interposed therebetween, and a non-aqueous liquid electrolyte, wherein the non-aqueous liquid electrolyte includes a non-aqueous solvent, and 6-alkylthio-1,3,5-triazine-2,4-dithiol; at least a portion of the 6-alkylthio-1,3,5-triazine-2,4-dithiol is dissolved in the non-aqueous solvent; and the alkylthio group at a 6th position preferably has an alkyl group with 1 to 8 carbon atoms.
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公开(公告)号：US12155041B2
公开(公告)日：2024-11-26
申请号：US17282094
申请日：2019-09-24
Inventor： Hiroyuki Okuda , Hideharu Takezawa , Yuko Ogawa , Yuki Tokuda
IPC: H01M10/0587 , H01M4/36 , H01M4/48 , H01M4/505 , H01M4/525 , H01M4/587 , H01M50/183 , H01M50/531 , H01M50/534 , H01M50/536
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：US20220115671A1
公开(公告)日：2022-04-14
申请号：US17426851
申请日：2019-12-12
Inventor： Yuko Ogawa , Hideharu Takezawa , Yuji Oura
IPC: H01M4/66
Abstract: This positive electrode is characterized by comprising a positive electrode collector, a positive electrode mixture layer that contains a lithium-containing transition metal oxide, and a protective layer that is arranged between the positive electrode collector and the positive electrode mixture layer, and is also characterized in that: the protective layer contains an inorganic compound that has a lower oxidative power than the lithium-containing transition metal oxide; a part of the lithium-containing transition metal oxide penetrates through the protective layer so as to be in contact with the positive electrode collector; and the coverage α of the main surface of the positive electrode collector by the protective layer is 50% or more.
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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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Patent Agency Ranking
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：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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公开(公告)号：US12237495B2
公开(公告)日：2025-02-25
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 , H01M50/531 , 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：US20230187779A1
公开(公告)日：2023-06-15
申请号：US17926054
申请日：2021-02-25
Inventor： Makoto Akutsu , Takao Sato , Yuko Ogawa
IPC: H01M50/42 , H01M50/46 , H01M50/449 , H01M50/417
CPC classification number: H01M50/42 , H01M50/46 , H01M50/449 , H01M50/417
Abstract: A power storage device includes a first electrode, a second electrode, a separator interposed between the first electrode and the second electrode, and a barrier layer interposed between at least one of the following: between the first electrode and the separator and between the second electrode and the separator, wherein the barrier layer includes a complexing agent and a resin material.
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