公开(公告)号：US20240429561A1

公开(公告)日：2024-12-26

申请号：US18694573

申请日：2022-09-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryohei Miyamae ,  Akira Kano ,  Shinichiro Kondo

IPC: H01M50/463 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/058 ,  H01M50/411 ,  H01M50/431 ,  H01M50/443 ,  H01M50/446 ,  H01M50/451 ,  H01M50/457 ,  H01M50/46 ,  H01M50/489

Abstract: A disclosed lithium secondary battery includes a positive electrode (11), a negative electrode (12), a separator (50) disposed between the positive electrode (11) and the negative electrode (12), and a non-aqueous electrolyte having lithium ion conductivity. The negative electrode (12) is an electrode on which lithium metal is deposited during charging and from which the lithium metal dissolves during discharging. The separator (50) includes a substrate (51) and a spacer (53). The spacer (53) is disposed on the positive electrode side with respect to the substrate (51). The spacer (53) includes line-shaped protrusions arranged in a mesh pattern. The mesh pattern includes a lacking part connecting regions within adjacent meshes.

公开(公告)号：US20230299261A1

公开(公告)日：2023-09-21

申请号：US17909475

申请日：2021-01-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shinichiro Kondo ,  Reiko Izumi ,  Daisuke Katou ,  Takuya Jin ,  Yosuke Takayama ,  Masateru Mikami

IPC: H01M4/04 ,  H01M4/62 ,  H01M4/66 ,  H01M4/13 ,  H01M4/139

CPC classification number: H01M4/0471 ,  H01M4/0435 ,  H01M4/13 ,  H01M4/139 ,  H01M4/623 ,  H01M4/661

Abstract: This secondary battery electrode is provided with a core material configured from a metal foil that softens at less than or equal to 200° C. and an electrode mixture sheet which is bonded on the surface of the core material. The electrode mixture sheet includes an active material and a fibrous binder, and the active material bites into the core material, with the maximum bite depth at least 30% of the thickness of the core material. The fibrous binder may for example have polytetrafluoroethylene as the main component.

公开(公告)号：US20240387861A1

公开(公告)日：2024-11-21

申请号：US18696465

申请日：2022-09-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryohei Miyamae ,  Akira Kano ,  Shinichiro Kondo

IPC: H01M10/0525 ,  H01M4/134 ,  H01M4/38 ,  H01M10/0568 ,  H01M50/414 ,  H01M50/431 ,  H01M50/446 ,  H01M50/451 ,  H01M50/491

Abstract: A disclosed lithium secondary battery includes a positive electrode (11), a negative electrode (12), a separator (50) disposed between the positive electrode (11) and the negative electrode (12), and a non-aqueous electrolyte having lithium ion conductivity. The negative electrode (12) is an electrode on which lithium metal is deposited during charging and from which the lithium metal dissolves during discharging. The separator (50) includes a substrate (51), a heat-resistant layer (52), and a spacer (53). The heat-resistant layer (52) is formed on at least one main surface selected from two main surfaces of the substrate (51). The spacer (53) is disposed on the negative electrode (12) side with respect to the substrate (51) and the heat-resistant layer (52). An average height of the spacer (53) is larger than a sum of an average thickness of the substrate and an average thickness of the heat-resistant layer.

公开(公告)号：US20240145721A1

公开(公告)日：2024-05-02

申请号：US18017702

申请日：2021-05-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Reiko Izumi ,  Daisuke Katou ,  Takuya Jin ,  Shinichiro Kondo

IPC: H01M4/62 ,  C08F14/26 ,  H01M4/04 ,  H01M4/13 ,  H01M4/139

CPC classification number: H01M4/623 ,  C08F14/26 ,  H01M4/0435 ,  H01M4/13 ,  H01M4/139

Abstract: Provided is a PTFE powder that is in a dry state, wherein the percentage of fibrous particles which have an aspect ratio of 1.5 or higher with respect to all particles is 20-60%, and the average major axis size of the fibrous particles is 1-20 μm. A PTFE powder according to another embodiment of the present invention is in a dry state, wherein the percentage of fibrous particles which have an aspect ratio of 5 or higher with respect to all particles is 60% or more, and the average minor axis size of the fibrous particles is 1-20 μm.

公开(公告)号：US20240128591A1

公开(公告)日：2024-04-18

申请号：US18276529

申请日：2022-02-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shinichiro Kondo ,  Ryohei Miyamae ,  Akira Kano

IPC: H01M50/477 ,  H01M10/052 ,  H01M10/058 ,  H01M50/474 ,  H01M50/486

CPC classification number: H01M50/477 ,  H01M10/052 ,  H01M10/058 ,  H01M50/474 ,  H01M50/486

Abstract: A lithium secondary battery includes a positive electrode, a negative electrode disposed opposed to the positive electrode, a separator interposed between the positive electrode and the negative electrode, a non-aqueous electrolyte having a lithium ion conductivity, and a spacer interposed between the negative electrode and the separator. A lithium metal deposits on the negative electrode during charging, and the lithium metal dissolves from the negative electrode during discharging. The spacer has a net structure formed with a plurality of lined projected portions.

公开(公告)号：US20230378468A1

公开(公告)日：2023-11-23

申请号：US18027545

申请日：2021-07-07

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Daisuke Katou ,  Reiko Izumi ,  Takuya Jin ,  Shinichiro Kondo

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/04

CPC classification number: H01M4/623 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/0435 ,  H01M2004/021

Abstract: With respect to this electrode, the coverage of the surface of a coated active material by a conductive material is from 10% to 60%; the mixture resistance of a electrode mixture material is 20 Ωcm or less in cases where the electrode mixture material is divided into three equal parts in the thickness direction, namely into a first region, a second region and a third region from a core material side, the content (a) of a PTFE powder in the first region, the content (b) of the PTFE powder in the second region and the content (c) of the PTFE powder in the third region satisfy −10%≤(c−a)/(a+b+c)≤10%.

公开(公告)号：US20240429562A1

公开(公告)日：2024-12-26

申请号：US18694576

申请日：2022-09-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryohei Miyamae ,  Akira Kano ,  Shinichiro Kondo

IPC: H01M50/474 ,  H01M10/052 ,  H01M50/431 ,  H01M50/443 ,  H01M50/46

Abstract: A disclosed lithium secondary battery includes a positive electrode (11), a negative electrode (12), a separator (50) disposed between the positive electrode (11) and the negative electrode (12), and a non-aqueous electrolyte having lithium ion conductivity. The negative electrode (12) is an electrode on which lithium metal is deposited during charging and from which the lithium metal dissolves during discharging. The separator (50) includes a substrate (51) and a spacer (53). The spacer (53) is disposed on the negative electrode (12) side with respect to the substrate (51). The spacer (53) includes line-shaped protrusions arranged in a mesh pattern. The mesh pattern includes a lacking part connecting regions within adjacent meshes.

公开(公告)号：US20240347864A1

公开(公告)日：2024-10-17

申请号：US18292678

申请日：2022-07-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shinichiro Kondo ,  Ryohei Miyamae ,  Akira Kano

IPC: H01M50/477 ,  H01M10/0525 ,  H01M10/0587 ,  H01M50/474 ,  H01M50/486

CPC classification number: H01M50/477 ,  H01M10/0525 ,  H01M10/0587 ,  H01M50/474 ,  H01M50/486

Abstract: A lithium secondary battery includes a positive electrode, a negative electrode facing the positive electrode, a separator disposed between the positive electrode and the negative electrode, a nonaqueous electrolyte having lithium ion conductivity, and a spacer disposed between the negative electrode and the separator. Lithium metal deposits on the negative electrode during charging and the lithium metal dissolves from the negative electrode during discharging. The spacer has a plurality of spot-like projection portions.