公开(公告)号：US20190386341A1

公开(公告)日：2019-12-19

申请号：US16480847

申请日：2018-01-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryo Kazawa ,  Yuta Kuroda ,  Masanobu Takeuchi

IPC: H01M10/0569 ,  H01M4/133 ,  H01M4/62

Abstract: Provided is a nonaqueous electrolyte secondary battery comprising: a negative electrode having a negative electrode active substance layer; a positive electrode; and a nonaqueous electrolyte containing a nonaqueous solvent. The negative electrode active substance layer contains: a negative electrode active substance containing a carbon-based active substance; and layered silicate particles. The nonaqueous solvent contains a fluorine-based solvent.

公开(公告)号：US12230793B2

公开(公告)日：2025-02-18

申请号：US17442051

申请日：2020-02-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuta Kuroda ,  Ryo Kazama

IPC: H01M4/38 ,  H01M4/02 ,  H01M4/133 ,  H01M4/134 ,  H01M4/36 ,  H01M4/583 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569

Abstract: A negative electrode for a non-aqueous electrolyte secondary battery including a negative electrode mixture layer including a negative electrode active material and a negative electrode additive, the negative electrode active material including a carbon material and a Si-containing material, the content of the Si-containing material in the negative electrode mixture layer being 5 mass % or more, and the negative electrode additive including a formaldehyde condensate of an aromatic organic acid having a hydroxyl group and/or an aromatic organic acid salt having a hydroxyl group.

公开(公告)号：US20230378448A1

公开(公告)日：2023-11-23

申请号：US18028368

申请日：2021-09-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tatsuro Sasa ,  Yuta Kuroda

IPC: H01M4/38 ,  H01M4/583 ,  H01M4/36 ,  H01M4/134 ,  H01M10/0525

CPC classification number: H01M4/386 ,  H01M4/583 ,  H01M4/364 ,  H01M4/134 ,  H01M10/0525 ,  H01M2004/027

Abstract: This negative electrode for secondary batteries is provided with a negative electrode mixture layer which comprises a binder material and a negative electrode active material that contains graphite particles and an Si-containing material; the Si-containing material contains an Si-containing material A which comprises a carbon phase and silicon particles that are dispersed in the carbon phase; in cases where the negative electrode mixture layer is divided into equal halves in the thickness direction, the average intraparticle void fraction of the graphite particles contained in the upper half region is 13% or less, and is smaller than the average intraparticle void fraction of the graphite particles contained in the lower half region.

公开(公告)号：US20230343932A1

公开(公告)日：2023-10-26

申请号：US18028015

申请日：2021-09-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuta Kuroda ,  Tatsuro Sasa

IPC: H01M4/36 ,  H01M4/587 ,  H01M4/38 ,  H01M4/485

CPC classification number: H01M4/364 ,  H01M4/587 ,  H01M4/386 ,  H01M4/485 ,  H01M2004/027

Abstract: This negative electrode for a secondary battery comprises a negative electrode mixture layer that includes: a negative electrode active material containing graphite particles and a Si-containing material; and a binder. The Si-containing material includes a Si-containing material A that includes a carbon phase and silicon particles dispersed in the carbon phase. The graphite particles include graphite particles A with 5% or less particle internal porosity, and the content of the graphite particles A is at least 10% by mass with respect to the total mass of the negative electrode active material. The content of the Si-containing material A is at least 1% by mass with respect to the total mass of the negative electrode active material.

公开(公告)号：US20230290939A1

公开(公告)日：2023-09-14

申请号：US18032431

申请日：2021-10-29

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuji Goshima ,  Yuta Kuroda ,  Fumiharu Niina ,  Tatsuro Sasa

IPC: H01M4/38 ,  H01M4/134

CPC classification number: H01M4/386 ,  H01M4/134

Abstract: A nonaqueous electrolyte secondary battery according to one embodiment of the present disclosure is provided with a positive electrode, a negative electrode and a nonaqueous electrolyte, while being characterized in that: the negative electrode comprises a negative electrode active material that contains an Si-containing material; the Si-containing material contains a first Si-containing material which comprises a silicate phase and silicon particles that are dispersed in the silicate phase, and a second Si-containing material which comprises a carbon phase and silicon particles that are dispersed in the carbon phase; and the difference between the initial charge/discharge efficiency (Efc) of the positive electrode and the initial charge/discharge efficiency (Efa) of the negative electrode, namely (Efc−Efa) satisfies 1%

公开(公告)号：US20190027776A1

公开(公告)日：2019-01-24

申请号：US16141081

申请日：2018-09-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuta Kuroda ,  Masanobu Takeuchi

IPC: H01M10/04 ,  H02J7/00 ,  H01M2/10

Abstract: A battery module includes multiple cells that are connected in parallel to each other and a positive-side lead plate electrically connected to a positive electrode of each cell. The battery module further includes a potential difference detection unit that detects three potential differences between two points of three points on the positive-side lead plate and a microcomputer that determines an abnormality of one cell based on a signal indicating the three potential differences between two points from the potential difference detection unit.