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公开(公告)号：US12148917B2
公开(公告)日：2024-11-19
申请号：US17441961
申请日：2020-02-17
Inventor： Takahiro Fukuoka , Masaki Hasegawa , Masahiro Soga , Yuto Horiuchi , Takashi Yamamoto
Abstract: A negative electrode for a non-aqueous electrolyte secondary battery includes a negative electrode material mixture including a negative electrode active material capable of electrochemically absorbing and desorbing lithium ions, a carbon nanotube; and an acrylic resin. The negative electrode active material includes a composite material including a silicate phase, and silicon particles dispersed in the silicate phase, and the silicate phase includes at least one selected from the group consisting of alkali metal elements and Group 2 elements.
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Patent Agency Ranking
公开(公告)号：US20240120560A1
公开(公告)日：2024-04-11
申请号：US18272945
申请日：2022-01-19
Inventor： Takashi Tsukasaki , Yuto Horiuchi
CPC classification number: H01M10/44 , H01M4/364 , H01M4/483 , H01M4/587 , H01M10/48 , H02J7/0048 , H02J7/00712 , H01M2004/027
Abstract: A charging method for a non-aqueous electrolyte secondary battery according to one aspect of the present disclosure comprises a switching step for switching the control temperature of a non-aqueous electrolyte secondary battery from high temperature to low temperature, wherein the non-aqueous electrolyte secondary battery includes a positive electrode and a negative electrode which reversibly perform intercalation and deintercalation of lithium ions, and the negative electrode contains, as a negative electrode active material, a carbon material and a silicon compound. The timing of the switching step is determined by detecting that dQGr/dQ, that is, the ratio of the amount of change in a capacity QGr of the carbon material to the amount of change in a battery capacity Q, becomes larger than dQSi/dQ, that is, the ratio of the amount of change in a capacity QSi of the silicon compound to the amount of change in the battery capacity Q.
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公开(公告)号：US20220190320A1
公开(公告)日：2022-06-16
申请号：US17441961
申请日：2020-02-17
Inventor： Takahiro Fukuoka , Masaki Hasegawa , Masahiro Soga , Yuto Horiuchi , Takashi Yamamoto
IPC: H01M4/36 , H01M4/62 , H01M4/134 , H01M4/38 , H01M10/0525
Abstract: A negative electrode for a non-aqueous electrolyte secondary battery includes a negative electrode material mixture including a negative electrode active material capable of electrochemically absorbing and desorbing lithium ions, a carbon nanotube; and an acrylic resin. The negative electrode active material includes a composite material including a silicate phase, and silicon particles dispersed in the silicate phase, and the silicate phase includes at least one selected from the group consisting of alkali metal elements and Group 2 elements.
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4.发明公开公开(公告)号：US20230335725A1
公开(公告)日：2023-10-19
申请号：US17796538
申请日：2021-01-21
Inventor： Masaki Hasegawa , Shunsuke Nambuya , Yuto Horiuchi
IPC: H01M4/38 , H01M10/0525 , H01M4/36 , H01M4/62
CPC classification number: H01M4/386 , H01M10/0525 , H01M4/364 , H01M4/625 , H01M2004/027
Abstract: A negative electrode for a non-aqueous electrolyte secondary battery includes a negative electrode current collector, and a negative electrode mixture layer supported on the negative electrode current collector. The negative electrode mixture layer includes a silicon material, a carbon material capable of electrochemically absorbing and releasing lithium ions, and electrically conductive fibers. The silicon material has a lithium-ion conductive phase, and silicon particles dispersed in the lithium-ion conductive phase. When the negative electrode mixture layer is divided into two layers, a first region and a second region, having the same thickness, the first region is nearer to the negative electrode current collector than the second region is, the silicon material is contained more in the second region than in the first region, and the conductive fibers are contained in the second region.
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公开(公告)号：US11448702B2
公开(公告)日：2022-09-20
申请号：US17056206
申请日：2019-05-20
Inventor： Yuto Horiuchi , Taisuke Yamamoto
IPC: H02J7/04 , G01R31/378 , G01R31/382 , H02J7/00 , H01M10/44 , H01M10/48 , H01M4/134 , H01M4/62 , H01M4/02
Abstract: A method for charging a nonaqueous electrolyte secondary battery includes a first charging step of charging a first capacity Q1st at a first constant current value I1st, the first capacity Q1st including a capacity range in which dQSi/dQ is more than or equal to a predetermined threshold value, a second charging step of charging a second capacity at a second constant current value more than the first constant current value, a detection step of acquiring at least one of dV/dQ and dQSi/dQ, and a changing step of changing at least one of the timing of switching between the first charging step and the second charging step and the first constant current value I1st on the basis of a change in time of dV/dQ or dQSi/dQ.
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公开(公告)号：US20210364575A1
公开(公告)日：2021-11-25
申请号：US17056206
申请日：2019-05-20
Inventor： Yuto Horiuchi , Taisuke Yamamoto
IPC: G01R31/378 , H01M10/44 , H01M10/48 , H02J7/00 , G01R31/382
Abstract: A method for charging a nonaqueous electrolyte secondary battery includes a first charging step of charging a first capacity Q1st at a first constant current value I1st, the first capacity Q1st including a capacity range in which dQSi/dQ is more than or equal to a predetermined threshold value, a second charging step of charging a second capacity at a second constant current value more than the first constant current value, a detection step of acquiring at least one of dV/dQ and dQSi/dQ, and a changing step of changing at least one of the timing of switching between the first charging step and the second charging step and the first constant current value I1st on the basis of a change in time of dV/dQ or dQSi/dQ.
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