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：US20240194952A1

公开(公告)日：2024-06-13

申请号：US18411755

申请日：2024-01-12

Applicant: Ningde Amperex Technology Limited

Inventor： Weiyuan ZHOU ,  Hai LONG ,  Zhifang DAI ,  Qingwen ZHANG

IPC: H01M10/0587 ,  H01M4/04 ,  H01M10/0525

CPC classification number: H01M10/0587 ,  H01M4/0404 ,  H01M10/0525

Abstract: An electrochemical apparatus includes a battery cell formed by a first electrode plate, a separator, and a second electrode plate through winding, where the first electrode plate includes a current collector, a tab, and an active substance layer. The current collector includes a first surface facing toward the interior of the battery cell and a second surface facing away from the interior of the battery cell; the tab is electrically connected to the current collector and extends out of the current collector; and the active substance layer is provided on the first surface and the second surface of the current collector. A winding start end of the first electrode plate is provided as a single-sided zone, an insulating coating is provided on the first surface of the current collector located in the single-sided zone, and the active substance layer is provided on the second surface.

公开(公告)号：US20240136535A1

公开(公告)日：2024-04-25

申请号：US18539272

申请日：2023-12-14

Applicant: Ningde Amperex Technology Limited

Inventor： Changchao DU ,  Kefei WANG ,  Feng ZHOU ,  Qingwen ZHANG

IPC: H01M4/66 ,  H01M4/133 ,  H01M10/0525

CPC classification number: H01M4/663 ,  H01M4/133 ,  H01M4/667 ,  H01M10/0525 ,  H01M2004/027

Abstract: An electrochemical device includes a negative electrode sheet. The negative electrode sheet includes a current collector, a first coating layer, and a second coating layer. The first coating layer is located between the current collector and the second coating layer. The second coating layer includes a negative active material. The first coating layer includes a conductive carbon material. The conductive carbon material includes at least one of carbon nanotubes or graphene. Based on a mass of the first coating layer, a mass percent of the conductive carbon material is 20% to 60%. The main material of the first coating layer is at least one of carbon nanotubes or graphene.

公开(公告)号：US20230275226A1

公开(公告)日：2023-08-31

申请号：US18300794

申请日：2023-04-14

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei WANG ,  Bing JIANG ,  Qingwen ZHANG ,  Changchao DU

IPC: H01M4/583 ,  H01M4/04 ,  H01M4/62 ,  H01M10/0568 ,  H01M10/0567 ,  H01M4/38

CPC classification number: H01M4/583 ,  H01M4/0404 ,  H01M4/622 ,  H01M10/0568 ,  H01M10/0567 ,  H01M4/38 ,  H01M2004/027

Abstract: An electrochemical apparatus includes a positive electrode, a negative electrode, and an electrolyte, the negative electrode includes a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector, the negative electrode mixture layer includes a negative electrode active substance, there is specific adhesion strength for the negative electrode active substance, and the electrolyte includes propionate. The electrochemical apparatus has improved high-temperature storage performance and overcharge protection performance.

公开(公告)号：US20210376328A1

公开(公告)日：2021-12-02

申请号：US17056073

申请日：2019-12-25

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kefei WANG ,  Qingwen ZHANG ,  Zhen DAI ,  Yingying WANG

IPC: H01M4/62 ,  H01M4/133 ,  H01M4/587 ,  H01M4/36

Abstract: An electrochemical device, including a cathode; an anode; and an electrolyte. The anode has an anode mixture layer on an anode current collector, the anode mixture layer includes a carbon material as an anode active material, and at least a part of a surface of the anode mixture layer or a surface of the carbon material comprises a polymer compound having Si—C and Si—O bonds. The electrochemical device has improved cycle performance and storage performance.