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公开(公告)号：US20190386285A1
公开(公告)日：2019-12-19
申请号：US16543779
申请日：2019-08-19
Inventor： Takahiro Takahashi , Tomoki Shiozaki
IPC: H01M2/26 , H01M2/34 , H01M10/0525 , H01M10/058
Abstract: A positive electrode for this non-aqueous electrolyte secondary battery is provided with: a positive electrode current collector; a positive electrode active material layer formed on the positive electrode current collector; a positive electrode tab connected to an exposed portion at which the positive electrode current collector is exposed and on which the positive electrode active material layer is not formed; and a protective layer covering the exposed portion and the positive electrode tab on the exposed portion. The protective layer is composed of a base material including a curable resin.
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公开(公告)号：US20190157650A1
公开(公告)日：2019-05-23
申请号：US16253494
申请日：2019-01-22
Inventor： Yuji Oura , Takahiro Takahashi , Tomoki Shiozaki , Hajime Nishino
Abstract: According to the present invention, a positive electrode of a lithium secondary battery is provided with an insulating tape that covers an electrode tab on an exposed part. This insulating tape has a multilayer structure that is composed of an organic material layer, a composite material layer which is formed from an organic material and an inorganic material, and an adhesive layer. The inorganic material in the composite material layer accounts for 20% or more of the weight of the composite material layer; and the inorganic material contains at least one substance selected from the group consisting of metal oxides, metal nitrides, metal fluorides and metal carbides. Puncture strength is ensured by means of the organic material layer, while heat resistance is ensured by means of the composite material layer.
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公开(公告)号：US11664503B2
公开(公告)日：2023-05-30
申请号：US16695920
申请日：2019-11-26
Inventor： Takahito Nakayama , Tomoki Shiozaki , Hideharu Takezawa
CPC classification number: H01M4/668 , H01M4/364 , H01M4/58 , H01M2004/027 , H01M2004/028
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：US11462773B2
公开(公告)日：2022-10-04
申请号：US16659774
申请日：2019-10-22
Inventor： Yuji Oura , Tomoki Shiozaki , Hideharu Takezawa , Takahito Nakayama , Takahiro Takahashi , Daisuke Furusawa
Abstract: A 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 first particles configured from an electrically conductive material, and second particles which are configured from an insulating inorganic material and have an average grain size greater than an average grain size of the first particles. The volume ratio of the first particles in the intermediate layer is not less than 25% and less than 70%. The volume ratio of the second particles in the intermediate layer is not less than 30% and less than 75%. The density of the intermediate layer is greater than 1 g/cm3 and not more than 2.5 g/cm3.
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公开(公告)号：US20220149385A1
公开(公告)日：2022-05-12
申请号：US17585919
申请日：2022-01-27
Inventor： Yuji Oura , Tomoki Shiozaki , Hideharu Takezawa
Abstract: This positive electrode for secondary batteries is provided with: a positive electrode collector which has a plurality of recesses and projections in the surface; an intermediate layer which is provided on the surface of the positive electrode collector having the recesses and projections; and a positive electrode mixture layer which is provided on the intermediate layer and contains a positive electrode active material. This positive electrode for secondary batteries is configured such that: the intermediate layer contains conductive material particles and inorganic material particles that have a higher resistance than the positive electrode active material; and both the ratio of the central particle diameter of the conductive material particles to the average depth of the recesses and projections of the positive electrode collector and the ratio of the central particle diameter of the inorganic material particles to the average depth of the recesses and projections of the positive electrode collector are 5:6 or less.
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Patent Agency Ranking
公开(公告)号：US20220013875A1
公开(公告)日：2022-01-13
申请号：US17283663
申请日：2019-10-04
Inventor： Tomoki Shiozaki , Kazuhiro Yoshii , Hajime Nishino
IPC: H01M50/595 , H01M50/531 , H01M50/586 , H01M10/0525 , C09J133/08 , H01M4/525 , C09J7/25
Abstract: A battery includes a positive electrode, a negative electrode, a positive electrode lead which is connected to the positive electrode, and a protective tape which covers the positive electrode lead. The protective tape includes a base material layer and an adhesive layer that is arranged on the base material layer; and the adhesive layer contains an adhesive material and a filler which contains at least one compound that is selected from among phosphoric acid group-containing compounds, boric acid group-containing compounds and silicic acid group-containing compounds.
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公开(公告)号：US20210075002A1
公开(公告)日：2021-03-11
申请号：US17040693
申请日：2019-02-22
Inventor： Takahito Nakayama , Tomoki Shiozaki , Hideharu Takezawa
Abstract: A positive electrode (11) according to one embodiment is provided with: a positive electrode collector (30); a first middle layer (32) disposed on one of two surfaces of the positive electrode collector (30), the surface being on the inner circumferential side when the positive electrode collector (30) is wound; a second middle layer (34) that is disposed on the other surface that is on the outer circumferential side; and a positive electrode mixed material layer (36) disposed on the first middle layer (32) and on the second middle layer (34). The first middle layer (32) and the second middle layer (34) contain insulating particles and an electrical conductor, and the thickness of the first middle layer (32) is less than the thickness of the second middle layer (34).
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公开(公告)号：US20210013516A1
公开(公告)日：2021-01-14
申请号：US16977579
申请日：2019-01-15
Inventor： Kohei Saito , Takahiro Takahashi , Hideharu Takezawa , Tomoki Shiozaki
IPC: H01M4/66
Abstract: This positive electrode includes: a positive electrode current collector; a positive electrode mixed material layer that is formed on at least one surface of the positive electrode current collector; and a protective layer which includes an insulating inorganic compound and a conductive material, and is interposed between the positive electrode current collector and the positive electrode mixed material layer. The protective layer includes secondary particles comprising agglomerated primary particles of the inorganic compound. The median value of the particle size of the secondary particles is 30 μm or less.
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公开(公告)号：US20200091515A1
公开(公告)日：2020-03-19
申请号：US16689387
申请日：2019-11-20
Inventor： Hideharu Takezawa , Tomoki Shiozaki
IPC: H01M4/525 , H01M4/36 , H01M10/0525 , H01M4/485
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：US20180131034A1
公开(公告)日：2018-05-10
申请号：US15861922
申请日：2018-01-04
Inventor： Yuji Oura , Tomoki Shiozaki
IPC: H01M10/052 , H01M4/13 , H01M4/36 , H01M4/38 , H01M10/058 , H01M10/0562
CPC classification number: H01M10/052 , H01M2/263 , H01M2/34 , H01M4/13 , H01M4/366 , H01M4/386 , H01M10/0562 , H01M10/058 , H01M10/0587 , Y02T10/7011
Abstract: A secondary battery includes a positive electrode having a positive electrode current collector and a positive electrode active material layer; a negative electrode having a negative electrode current collector and a negative electrode active material layer; a separator interposed between the electrodes; a electrolyte; a positive electrode lead; and an insulating tape that covers part of the positive electrode. The positive electrode current collector has an exposed portion connected to the positive electrode lead. The positive electrode lead has an extending portion that projects from the exposed portion and an overlapping portion that overlaps the exposed portion. At least part of the exposed portion and at least part of the overlapping portion are covered with the insulating tape. The insulating tape has a substrate layer and an adhesive layer. The substrate layer contains a polyimide. The adhesive layer has an electrical resistance of 1 kΩ/mm2 or more at 500° C.
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