公开(公告)号：US20240339599A1

公开(公告)日：2024-10-10

申请号：US18621871

申请日：2024-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Xiaohu CAI

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/62 ,  H01M4/66 ,  H01M10/0587

CPC classification number: H01M4/366 ,  H01M4/622 ,  H01M4/625 ,  H01M10/0587 ,  H01M2004/021 ,  H01M2004/028 ,  H01M4/661

Abstract: An electrochemical device includes a jelly-roll electrode assembly and a packaging shell. The jelly-roll electrode assembly includes a positive electrode plate, a negative electrode plate, and a separator. The positive electrode plate includes a positive current collector, a first layer, and a second layer. The first layer includes inorganic particles. Based on a mass of the first layer, a mass percent of the inorganic particles is greater than or equal to 50%. The second layer includes a positive active material. A thickness of the first layer is d1 μm. An area of orthographic projection of the first layer is S1 mm2, an area of orthographic projection of the second layer is S2 mm2, satisfying: d1/S1≥2×10−6, and d1/S2≥2.5×10−6. The first layer is in contact with the packaging shell.

公开(公告)号：US20240038995A1

公开(公告)日：2024-02-01

申请号：US18478154

申请日：2023-09-29

Applicant: Ningde Amperex Technology Limited

Inventor： Xiaohu CAI

IPC: H01M4/62 ,  G01N23/2055

CPC classification number: H01M4/623 ,  G01N23/2055 ,  H01M2004/028

Abstract: An electrochemical apparatus includes a positive electrode, the positive electrode includes a current collector and a positive electrode mixture layer disposed on at least one surface of the current collector. The positive electrode mixture layer includes a positive electrode active substance and a binder. The binder includes a fluorine-containing polymer. In an XRD diffraction pattern of the fluorine-containing polymer, a diffraction peak A appears at 25° to 27° and corresponds to a (111) crystal plane, and a diffraction peak B appears at 37° to 39° and corresponds to a (022) crystal plane, where an area ratio of the diffraction peak A to the diffraction peak B satisfies 1≤A(111)/B(022)≤4.

公开(公告)号：US20230395787A1

公开(公告)日：2023-12-07

申请号：US18454363

申请日：2023-08-23

Applicant: Ningde Amperex Technology Limited

Inventor： Shengqi LIU ,  Xiaohu CAI ,  Kefei WANG ,  Qingwen ZHANG

IPC: H01M4/36 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01M10/0525 ,  H01M2004/028

Abstract: An electrochemical device includes a positive electrode, the positive electrode includes a current collector and a film layer containing a positive active material. The film layer is disposed on at least one surface of the current collector. The positive active material includes a primary particle and/or a secondary particle. When a mass percent A of the primary particle in the positive active material based on a mass of the positive active material satisfies 20%≤A≤100%, the film layer, the positive active material, and the current collector satisfy: Dl≥Dv99−Dc; and, when a mass percent A′ of the primary particle in the positive active material based on the mass of the positive active material satisfies 0≤A′≤20%, the film layer, the positive active material, and the current collector satisfy: Dl≥1.1 Dv99.

公开(公告)号：US20240145724A1

公开(公告)日：2024-05-02

申请号：US18385525

申请日：2023-10-31

Applicant: Ningde Amperex Technology Limited

Inventor： Xiaohu CAI

IPC: H01M4/62 ,  H01M4/131 ,  H01M4/525

CPC classification number: H01M4/625 ,  H01M4/131 ,  H01M4/525 ,  H01M4/623 ,  H01M2004/021

Abstract: An electrochemical apparatus includes a positive electrode plate. The positive electrode plate includes a positive electrode current collector and a positive electrode active material layer disposed on a surface of the positive electrode current collector. The positive electrode active material layer includes a positive electrode active material and a conductive agent, the conductive agent containing secondary particles, where a total sectional area S0 of the secondary particles and a sectional area S1 of the positive electrode active material layer satisfy 0

公开(公告)号：US20240021832A1

公开(公告)日：2024-01-18

申请号：US18476885

申请日：2023-09-28

Applicant: Ningde Amperex Technology Limited

Inventor： Xiaohu CAI

IPC: H01M4/62 ,  H01M4/131 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M4/623 ,  H01M4/131 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028

Abstract: A positive electrode includes a current collector and a positive electrode mixture layer provided on at least one surface of the current collector, the current collector includes a first region and a second region, the first region is coated with the positive electrode mixture layer, the second region is a foil-free region of the positive electrode, the positive electrode mixture layer includes a positive electrode active material and a binder, and a roughness Sa1 of a surface of a current collector of the first region and a roughness Sa2 of a surface of a current collector of the second region satisfy: 1≤Sa1/Sa2≤20. The positive electrode of the present application has a high compacted density and toughness, thereby improving the problem of brittle fracture of the positive electrode and improving the rate capability of a lithium-ion battery.

公开(公告)号：US20230261186A1

公开(公告)日：2023-08-17

申请号：US18302268

申请日：2023-04-18

Applicant: Ningde Amperex Technology Limited

Inventor： Xiaohu CAI ,  Shengqi LIU ,  Dongdong HAN ,  Kefei WANG

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/131

CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M4/131 ,  H01M2004/028

Abstract: A positive electrode and an electrochemical apparatus and an electronic apparatus containing the same. A positive electrode, the positive electrode including a current collector and a positive electrode active substance layer are disposed on the current collector, where the positive electrode active substance layer includes a positive electrode active material and graphene; and a ratio Dv50/D1 of a particle size Dv50 of the positive electrode active material to a sheet diameter D1 of the graphene is 0.45-4.5.