公开(公告)号：US20250038314A1

公开(公告)日：2025-01-30

申请号：US18841482

申请日：2023-02-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akira Kano ,  Takahiro Inoue

IPC: H01M50/107 ,  H01M10/052 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/0587 ,  H01M50/446 ,  H01M50/451

Abstract: A cylindrical lithium secondary battery including a battery case of a bottomed cylindrical shape having an opening, a wound electrode group and a nonaqueous electrolyte which are housed in the battery case, and a sealing member sealing the opening. The wound electrode group includes a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode. At the negative electrode, lithium metal deposits during charging and dissolves in the nonaqueous electrolyte during discharging. The nonaqueous electrolyte contains an electrolyte salt, and a solvent. The solvent contains an ether compound as a major component. The amount of the nonaqueous electrolyte per 1 mAh of discharge capacity of the lithium secondary battery is 2.5 μL or more and 6.5 μL or less.

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：US20240128780A1

公开(公告)日：2024-04-18

申请号：US18274342

申请日：2022-01-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryohei Miyamae ,  Akira Kano ,  Takahiro Fukuoka

IPC: H02J7/00 ,  H01M10/052 ,  H01M10/44 ,  H01M10/46

CPC classification number: H02J7/00712 ,  H01M10/052 ,  H01M10/44 ,  H01M10/46 ,  H02J7/0048

Abstract: A method of charging a secondary battery, the battery including a positive electrode in which a lithium ion is stored during discharging and released during charging, a negative electrode in which a lithium metal deposits during charging and dissolves during discharging, and a non-aqueous electrolyte having a lithium ion conductivity, wherein the method includes a step of charging the secondary battery according to a first charging profile. In the secondary battery, a surface of the negative electrode is covered with a protection layer. In the first charging profile, charging starts from a first charging step in which charging is performed at a constant current with a first electric current density I1, and following the first charging step, a second charging step is performed in which charging is performed at a constant current with a second electric current density I2 that is larger than the first electric current density I1.

公开(公告)号：US20230335797A1

公开(公告)日：2023-10-19

申请号：US18028887

申请日：2021-08-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shoshi Terada ,  Akira Kano

IPC: H01M10/0567 ,  H01M10/052

CPC classification number: H01M10/0567 ,  H01M10/052

Abstract: A lithium secondary battery includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, wherein in the negative electrode, lithium metal deposits during charging and the lithium metal dissolves during discharging, the non-aqueous electrolyte includes a fluoroalcohol, an oxalate complex anion including fluorine, a lithium ion, and a non-aqueous solvent.

公开(公告)号：US20230307627A1

公开(公告)日：2023-09-28

申请号：US18015239

申请日：2021-06-14

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shoshi Terada ,  Akira Kano

IPC: H01M4/525 ,  H01M10/052 ,  H01M4/131 ,  H01M10/0568

CPC classification number: H01M4/525 ,  H01M4/131 ,  H01M10/052 ,  H01M10/0568 ,  H01M2004/028

Abstract: A lithium secondary battery includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The positive electrode includes a lithium-transition metal composite oxide. The lithium-transition metal composite oxide contains at least Ni, and has a ratio of Ni to total metal elements other than Li of 90 mol% or more. In the negative electrode, lithium metal deposits during charge, and the lithium metal dissolves during discharge. The non-aqueous electrolyte includes a non-aqueous solvent, lithium ions, an oxalate complex anion having fluorine, and nitrate anions.

公开(公告)号：US20230198022A1

公开(公告)日：2023-06-22

申请号：US17926350

申请日：2021-04-08

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shoshi Terada ,  Akira Kano

IPC: H01M10/0568 ,  H01M10/052 ,  H01M50/46 ,  H01M4/38

CPC classification number: H01M10/0568 ,  H01M10/052 ,  H01M50/46 ,  H01M4/382 ,  H01M2004/027

Abstract: A lithium secondary battery includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. In the negative electrode, lithium metal deposits during charging and the lithium metal dissolves during discharging. The nonaqueous electrolyte includes a lithium ion, a cation of a metal M1 that forms an alloy with lithium, and a halide ion.

公开(公告)号：US20220190379A1

公开(公告)日：2022-06-16

申请号：US17599358

申请日：2020-02-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomohisa Okazaki ,  Akira Kano

IPC: H01M10/052 ,  H01M4/134 ,  H01M4/131 ,  H01M10/056 ,  H01M4/66

Abstract: A lithium secondary battery including a positive electrode including a positive electrode material mixture containing a positive electrode additive, a negative electrode, a separator, and an electrolyte. The positive electrode additive includes at least one selected from the group consisting of a first compound represented by formula (1): Lia1Fex1M1y1Oz1 and a second compound represented by formula (2): Lia2Nix2M2y2Oz2. The formula (1) satisfies 0≤a1≤5, 0≤x1≤5, 0≤y1≤1, and 0≤z1≤4, where at least two of a1, x1, y1 and z1 are greater than 0. The formula (2) satisfies 0≤a2≤2, 0≤x2≤1, 0≤y2≤1, and 1≤z2≤2, where at least one of a2 and x2 is greater than 0. The electrolyte contains an oxalate complex salt having an oxalate complex anion and a lithium ion.

公开(公告)号：US11251437B2

公开(公告)日：2022-02-15

申请号：US16389038

申请日：2019-04-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akira Kano ,  Ryohei Miyamae ,  Kiyohiro Isii ,  Kensuke Nakura

IPC: H01M4/70 ,  H01M4/134 ,  H01M4/38 ,  H01M4/66 ,  H01M10/052 ,  H01M10/0587 ,  H01M4/02

Abstract: A lithium secondary battery comprises an electrode group and a nonaqueous electrolyte having lithium-ion conductivity. A negative electrode current collector has a first surface facing outward of winding of the electrode group and a second surface facing inward of the winding of the electrode group. At least the first surface or the second surface includes a first region and a second region that is closer to an innermost circumference of the winding of the electrode group than the first region. Protrusions include outer-circumference-side protrusions disposed on the first region and inner-circumference-side protrusions disposed on the second region. In at least the first surface or the second surface, a first area rate is larger than a second area rate.

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：US20240429395A1

公开(公告)日：2024-12-26

申请号：US18273864

申请日：2022-01-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryohei Miyamae ,  Akira Kano ,  Kiyohiro Ishii

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/36 ,  H01M10/0525

Abstract: A lithium secondary battery includes a positive electrode that absorbs lithium ions during discharge and releases the lithium ions during charge, a negative electrode at which a lithium metal deposits during charge and from which the lithium metal dissolves during discharge, and a non-aqueous electrolyte having lithium ion conductivity. The surface of the negative electrode is covered with a protective layer. The protective layer includes a block polymer in which a first polymer segment having a repeating structure of a monomer unit A and a second polymer segment having a repeating structure of a monomer unit B are bound together.