公开(公告)号：US20210376333A1

公开(公告)日：2021-12-02

申请号：US17404090

申请日：2021-08-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomoki Shiozaki ,  Yuji Oura ,  Hajime Nishino

IPC: H01M4/66 ,  H01M50/531 ,  H01M50/572 ,  H01M4/13 ,  H01M4/40 ,  H01M4/46 ,  H01M10/0525

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 electrolyte; and an insulating tape covering a portion of the positive electrode. Furthermore, the positive-electrode current collector has an exposed section that the positive-electrode active-material layer is not disposed. In addition, at least a portion of the exposed section is covered with the insulating tape; the insulating tape has a substrate material layer and an adhesive layer; and the adhesive layer includes an adhesive agent and an insulating inorganic material.

公开(公告)号：US20200020924A1

公开(公告)日：2020-01-16

申请号：US16580206

申请日：2019-09-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hideharu Takezawa ,  Daisuke Furusawa ,  Yuji Oura ,  Takahiro Takahashi ,  Takahito Nakayama ,  Tomoki Shiozaki

IPC: H01M2/32 ,  H01M4/131 ,  H01M4/46 ,  H01M4/48 ,  H01M4/62

Abstract: A positive electrode is disclosed including a positive electrode collector containing aluminum, a positive electrode mixture layer containing a positive electrode active substance constituted from a lithium transition metal oxide, and a protective layer provided between the positive electrode collector and the positive electrode mixture layer. The protective layer contains inorganic compound particles and a conductive material, and has a recessed structure wherein the positive electrode mixture layer is recessed into the protective layer.

公开(公告)号：US20180159136A1

公开(公告)日：2018-06-07

申请号：US15886417

申请日：2018-02-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomoki Shiozaki ,  Yuji Oura ,  Hajime Nishino

IPC: H01M4/66 ,  H01M2/26 ,  H01M2/34 ,  H01M4/13 ,  H01M4/46 ,  H01M4/40 ,  H01M10/0525

CPC classification number: H01M4/661 ,  H01M2/26 ,  H01M2/263 ,  H01M2/34 ,  H01M4/13 ,  H01M4/40 ,  H01M4/463 ,  H01M10/04 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2004/025 ,  H01M2004/028

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 electrolyte; and an insulating tape covering a portion of the positive electrode. Furthermore, the positive-electrode current collector has an exposed section that the positive-electrode active-material layer is not disposed. In addition, at least a portion of the exposed section is covered with the insulating tape; the insulating tape has a substrate material layer and an adhesive layer; and the adhesive layer includes an adhesive agent and an insulating inorganic material.

公开(公告)号：US12199267B2

公开(公告)日：2025-01-14

申请号：US17274853

申请日：2019-07-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuji Oura ,  Yuki Tokuda

IPC: H01M4/13 ,  H01M4/36 ,  H01M4/48 ,  H01M4/62 ,  H01M10/0525

Abstract: In the present invention, this positive electrode is provided with: a collector; and a composite material layer that is formed on at least one surface of the collector. The composite material layer includes a particulate aggregate formed from inorganic substance particles which do not occlude or emit Li, a conductive material, and a binding material for binding the inorganic particles and the conductive material. According to an exemplary embodiment, the aggregate is present closer to the collector side at least with respect to the thickness-direction center of the composite material layer, and accounts for at least 1.3 vol % with respect to the volume of the composite material layer.

公开(公告)号：US20220376227A1

公开(公告)日：2022-11-24

申请号：US17763087

申请日：2020-07-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuta Kuroda ,  Kazuhiro Yoshii ,  Yuji Oura

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/583

Abstract: A negative electrode for lithium ion secondary batteries according to the present invention is provided with a negative electrode collector and a negative electrode mixture layer that is formed on the negative electrode collector; the negative electrode mixture layer comprises a negative electrode active material which contains graphite particles A that have an internal porosity of 10% or less, graphite particles B that have an internal porosity of more than 10%, and an alloying material that is alloyed with lithium; and the content of the alloying material is 15% by mass or less relative to the total amount of the negative electrode active material in the negative electrode mixture layer.

公开(公告)号：US11462773B2

公开(公告)日：2022-10-04

申请号：US16659774

申请日：2019-10-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuji Oura ,  Tomoki Shiozaki ,  Hideharu Takezawa ,  Takahito Nakayama ,  Takahiro Takahashi ,  Daisuke Furusawa

IPC: H01M4/62 ,  H01M10/42 ,  H01M4/13 ,  H01M4/36 ,  H01M4/02

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.

公开(公告)号：US20220149385A1

公开(公告)日：2022-05-12

申请号：US17585919

申请日：2022-01-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuji Oura ,  Tomoki Shiozaki ,  Hideharu Takezawa

IPC: H01M4/66 ,  H01M4/70

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.

公开(公告)号：US20180131034A1

公开(公告)日：2018-05-10

申请号：US15861922

申请日：2018-01-04

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

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.

公开(公告)号：US11264635B2

公开(公告)日：2022-03-01

申请号：US15861922

申请日：2018-01-04

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Yuji Oura ,  Tomoki Shiozaki

IPC: H01M50/595 ,  H01M50/59 ,  H01M10/052 ,  H01M10/0587 ,  H01M50/538 ,  H01M4/13 ,  H01M4/36 ,  H01M4/38 ,  H01M10/0562 ,  H01M10/058 ,  H01M50/572

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.

公开(公告)号：US11201334B2

公开(公告)日：2021-12-14

申请号：US16568826

申请日：2019-09-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazuki Endo ,  Tomoki Shiozaki ,  Yuji Oura

IPC: H01M4/66 ,  H01M4/131 ,  H01M4/62 ,  H01M4/485 ,  H01M10/0525 ,  H01M4/02 ,  H01M10/052 ,  H01M10/0585

Abstract: A positive electrode is provided with: a positive electrode current collector constituted of aluminum as the main component; a positive electrode mixture layer formed on the positive electrode current collector aid containing a lithium-containing transition metal oxide; and a protective layer interposed between the positive electrode current collector and the positive electrode mixture layer. The protective layer contains inorganic particles, a conductive agent, and a binder material. In the positive electrode, the peel strength between the positive electrode current collector and the protective layer is higher than the peel strength between the protective layer and the positive electrode mixture layer.