公开(公告)号：US20240339612A1

公开(公告)日：2024-10-10

申请号：US18664902

申请日：2024-05-15

Applicant: Ningde Amperex Technology Limited

Inventor： Mingju LIU ,  Yajie LI ,  Qingwen ZHANG

IPC: H01M4/583 ,  H01M4/02 ,  H01M4/04 ,  H01M4/1393 ,  H01M4/62 ,  H01M4/66

CPC classification number: H01M4/583 ,  H01M4/0404 ,  H01M4/0471 ,  H01M4/1393 ,  H01M4/622 ,  H01M4/625 ,  H01M4/661 ,  H01M2004/021 ,  H01M2004/027

Abstract: An electrochemical apparatus includes an electrode, the electrode includes a current collector and an active material layer disposed on at least one surface of the current collector, where when the active material layer is subjected to thermogravimetric analysis at a temperature rise rate of 10° C./min in an inert atmosphere, a result of the thermogravimetric analysis shows that a mass change of the active material layer at 200° C. to 350° C. is 0% to 0.2%.

公开(公告)号：US20240297302A1

公开(公告)日：2024-09-05

申请号：US18664714

申请日：2024-05-15

Applicant: Ningde Amperex Technology Limited

Inventor： Mingju LIU ,  Yajie LI ,  Qingwen ZHANG

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/04 ,  H01M4/13 ,  H01M4/139 ,  H01M4/62

CPC classification number: H01M4/366 ,  H01M4/0404 ,  H01M4/043 ,  H01M4/0471 ,  H01M4/13 ,  H01M4/139 ,  H01M4/622 ,  H01M2004/021

Abstract: An electrochemical apparatus includes an electrode, the electrode includes a current collector and an active material layer located on one side or two sides of the current collector. The active material layer includes a first region and a second region, and in a thickness direction of the electrode, the first region is located between the current collector and the second region. The first region is from a current collector side to ⅔ of thickness of the active material layer, and the second region is from ⅔ of thickness of the active material layer to a surface of the electrode. Results of thermogravimetric analysis performed on the active material layer in an inert atmosphere at a temperature rise rate of 10° C./min show that a difference in the numbers of thermal weight loss peaks between the first region and the second region at 200° C. to 800° C. is ≥1.

公开(公告)号：US20250054973A1

公开(公告)日：2025-02-13

申请号：US18921499

申请日：2024-10-21

Applicant: Ningde Amperex Technology Limited

Inventor： Weiyuan ZHOU ,  Sen ZHANG ,  Yajie LI

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/583 ,  H01M4/62 ,  H01M4/66

Abstract: A winding single-sided region starting section of a first current collector, a surface facing the center of an electrode assembly is provided with a first protective layer and a surface facing away from the center of the electrode assembly is provided with a first active material layer; and for a winding single-sided region ending section of a second current collector, a surface facing away from the center of the electrode assembly is provided with a second protective layer, and a surface facing the center of the electrode assembly is provided with a second active material layer. A ratio of a unit area weight of the first protective layer to a unit area weight of the first active material layer is (0.03-0.75):1, and a ratio of a unit area weight of the second protective layer to a unit area weight of the second active material layer is (0.03-0.75):1.

公开(公告)号：US20240021829A1

公开(公告)日：2024-01-18

申请号：US18472544

申请日：2023-09-22

Applicant: Ningde Amperex Technology Limited

Inventor： Chengxin HU ,  Yajie LI

IPC: H01M4/62

CPC classification number: H01M4/622 ,  H01M2004/027

Abstract: A binder is a polymer including structural units represented by a formula I, a formula II, and a formula III. R1 is selected from any one of a substituted or unsubstituted C1-C10 alkyl group, a substituted or unsubstituted C2-C10 alkenyl group, a substituted or unsubstituted C2-C10 alkynyl group, or a substituted or unsubstituted C6-C20 aryl group; R2 is selected from a phenolic hydroxyl group and the number of phenolic hydroxyl groups is 2 to 5; R3 is one of C, S, N, or P; X is selected from any one of Li, Na, or K; R4 and R5 each are independently selected from one of a hydrogen atom, a substituted or unsubstituted C1-C10 alkyl group, a substituted or unsubstituted C2-C10 alkenyl group, a substituted or unsubstituted C2-C10 alkynyl group, or a substituted or unsubstituted C6-C20 aryl group; and n1, n2, and n3 each are independently an integer greater than zero.

公开(公告)号：US20240297307A1

公开(公告)日：2024-09-05

申请号：US18664705

申请日：2024-05-15

Applicant: Ningde Amperex Technology Limited

Inventor： Mingju LIU ,  Yajie LI ,  Qingwen ZHANG

IPC: H01M4/60 ,  H01M4/02 ,  H01M4/04 ,  H01M4/1399 ,  H01M4/62

CPC classification number: H01M4/602 ,  H01M4/0404 ,  H01M4/0471 ,  H01M4/1399 ,  H01M4/625 ,  H01M2004/021 ,  H01M2004/027

Abstract: An electrochemical apparatus includes an electrode, the electrode includes a current collector and an active material layer located on one side or two sides of the current collector; where along a thickness direction of the active material layer, the active material layer is divided into four portions, each portion is a detection region, the detection region is subjected to thermogravimetric analysis at a temperature rise rate of 10° C./min in an inert atmosphere, and results of the thermogravimetric analysis show that a weight loss mass percentage of the detection region at 200° C. to 800° C. gradually increases as a distance between the detection region and the current collector decreases in the thickness direction.

公开(公告)号：US20230420687A1

公开(公告)日：2023-12-28

申请号：US18464700

申请日：2023-09-11

Applicant: Ningde Amperex Technology Limited

Inventor： Yajie LI

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/133

CPC classification number: H01M4/625 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/133 ,  H01M2004/021

Abstract: An electrochemical device includes a positive electrode, the positive electrode includes a positive electrode active material layer, the positive electrode active material layer includes a positive electrode active material and a composite carbon material. A is a volume of the positive electrode active material layer, B is a volume of pores having a pore diameter of less than 2 μm in the positive electrode active material layer, and 14%≤B/A≤20%. The positive electrode active material layer includes the positive electrode active material and the composite carbon material, and 14%≤B/A≤20%, and indicates that the formed positive electrode has abundant pores for lithium ion transport.