公开(公告)号：US20240173761A1

公开(公告)日：2024-05-30

申请号：US18433517

申请日：2024-02-06

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Hao LI ,  Xiaowei LI ,  Zhenxing PEI ,  Yingjun SONG

IPC: B21D19/04 ,  B24B9/04 ,  B24B41/04 ,  B24B47/20 ,  H01M4/04

CPC classification number: B21D19/04 ,  B24B9/04 ,  B24B41/04 ,  B24B47/20 ,  H01M4/0435

Abstract: A device for repairing burrs of an electrode plate is provided, which includes a plurality of shaping rollers, wherein a shaping surface is formed on an outer surface of each of the shaping rollers, and along a conveying direction of an electrode plate, included angles between the plurality of shaping surfaces and a surface of the electrode plate decrease in sequence. The device for repairing burrs of an electrode plate gradually decreases the angle between the burrs and the electrode plate until the burrs are flattened, and the end-surface burrs are finally transformed into flat-surface burrs, thereby reducing the safety risk of batteries.

公开(公告)号：US20240243266A1

公开(公告)日：2024-07-18

申请号：US18622285

申请日：2024-03-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Congsu NIU ,  Zhenxing PEI ,  Xiaowei LI ,  Xiaomei LIU

IPC: H01M4/36 ,  C01B25/45 ,  H01M4/02 ,  H01M4/04 ,  H01M4/131 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/58 ,  H01M4/587

CPC classification number: H01M4/366 ,  C01B25/45 ,  H01M4/0404 ,  H01M4/131 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/5825 ,  H01M4/587 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/80 ,  C01P2006/11 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/028

Abstract: A positive electrode material composition includes a positive electrode active material and optionally, an optional positive electrode conductive agent, the positive electrode active material includes a core and a shell on at least a portion of a surface of the core, the core includes lithium phosphate, the shell includes a carbon material, a graphitization degree of the positive electrode active material is denoted as g1, a mass percentage of the positive electrode conductive agent in the positive electrode material composition is denoted as w1, 10%≤g1≤50%, and 0%≤w1≤1%.

公开(公告)号：US20230146812A1

公开(公告)日：2023-05-11

申请号：US18069989

申请日：2022-12-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shuqin LV ,  Xiaowei LI ,  Zhenxing PEI

IPC: H01M4/36 ,  H01M4/66

CPC classification number: H01M4/366 ,  H01M4/663 ,  H01M2004/027

Abstract: A negative electrode plate includes a negative electrode current collector and active material layers disposed on at least one surface of the negative electrode current collector. The active material layers include a first active material layer and a second active material layer disposed on a surface of the first active material layer. The first active material layer includes a first active material, the second active material layer includes a second active material, and the active material layers satisfy α×CW2≤CW1.




α
=


d
⁢
2


d
⁢
1






is a relative factor of layer spacings and 1≤α≤1.12. d1 and d2 are layer spacings corresponding to d002 peaks of the first and second active materials, respectively, in units of nm. CW1 and CW2 are masses per unit area of the first and second active material layers, respectively, in units of g/m2.