公开(公告)号：US20240291118A1

公开(公告)日：2024-08-29

申请号：US18649394

申请日：2024-04-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Manman WANG ,  Feng LIU ,  Xiaoming GE

IPC: H01M50/536 ,  B23K20/10 ,  H01M4/02 ,  H01M4/04 ,  H01M4/66 ,  H01M4/80 ,  H01M50/534

CPC classification number: H01M50/536 ,  B23K20/103 ,  H01M4/0435 ,  H01M4/661 ,  H01M4/808 ,  H01M50/534 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2220/20

Abstract: This application provides a negative electrode plate and a method for preparing same. In the method, a metal foil is connected to a foamed metal current collector by roll welding, so as to form the negative electrode plate. The metal foil forms a tab of the negative electrode plate, and the foamed metal current collector includes a foamed metal layer of a porosity of 60% to 99%, and optionally 80% to 85%. The method reduces or avoids flying metal chips and cold solder joints, and improves mechanical strength and electrical conductivity of the electrode plate. This application also provides a negative electrode plate prepared by the method, a secondary battery containing the negative electrode plate, and an electrical device.

公开(公告)号：US20240079603A1

公开(公告)日：2024-03-07

申请号：US18388531

申请日：2023-11-10

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaoming GE ,  Yujie CHEN ,  Feng LIU

IPC: H01M4/80 ,  H01M4/66 ,  H01M50/213

CPC classification number: H01M4/808 ,  H01M4/661 ,  H01M50/213 ,  H01M2220/20

Abstract: The present application discloses a current collector, and manufacturing method and equipment thereof, and a current collector preform, wherein the current collector may include a porous foam metal part and solid metal part(s); the porous foam metal part may be uncompressed, and the porous foam metal part may include a first edge and a second edge oppositely distributed in a first direction, the first direction may be perpendicular to the thickness direction of the current collector; the first edge and/or the second edge may be connected with the solid metal part(s).

公开(公告)号：US20240372217A1

公开(公告)日：2024-11-07

申请号：US18773639

申请日：2024-07-16

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Feng LIU ,  Yulei FAN ,  Yiheng WANG ,  Wei ZHONG ,  Xiaoming GE

IPC: H01M50/451 ,  H01M50/417 ,  H01M50/429 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/457 ,  H01M50/489

Abstract: The present application provides a separator, including first base films sequentially arranged in a stacked manner, a coating containing ceramic particles, graphene oxide and a binder, and a second base film. The separator in the present application has good electrolyte solution wettability, may effectively inhibit the growth of lithium dendrites, and has a small resistance, which may effectively improve the safety, dynamic and cycling performance of a corresponding battery. The present application further provides a secondary battery, battery module, battery pack and electrical apparatus using the separator.

公开(公告)号：US20240363968A1

公开(公告)日：2024-10-31

申请号：US18768850

申请日：2024-07-10

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Feng LIU ,  Yulei FAN ,  Yiheng WANG ,  Xiaoming GE

IPC: H01M50/451 ,  C08K3/22 ,  C08K3/36 ,  C08K9/04 ,  C09D179/04 ,  H01M50/403 ,  H01M50/417 ,  H01M50/431 ,  H01M50/443 ,  H01M50/446 ,  H01M50/457 ,  H01M50/491

CPC classification number: H01M50/451 ,  C09D179/04 ,  H01M50/403 ,  H01M50/417 ,  H01M50/431 ,  H01M50/443 ,  H01M50/446 ,  H01M50/457 ,  H01M50/491 ,  C08K2003/2231 ,  C08K2003/2241 ,  C08K2003/2248 ,  C08K2003/2272 ,  C08K3/36 ,  C08K9/04 ,  C08K2201/005 ,  H01M2220/20

Abstract: A separator includes a first porous base film; a second porous base film; and a supporting layer arranged between the first porous base film and the second porous base film, wherein the supporting layer comprises a polydopamine material and inorganic particles dispersed in the polydopamine material, and has an elastic modulus ≥5 Gpa.

公开(公告)号：US20240234789A1

公开(公告)日：2024-07-11

申请号：US18612823

申请日：2024-03-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yujie CHEN ,  Feng LIU ,  Xiaoming GE

IPC: H01M10/04 ,  H01M4/04 ,  H01M4/70 ,  H01M50/103 ,  H01M50/15 ,  H01M50/209

CPC classification number: H01M10/0431 ,  H01M4/0435 ,  H01M4/70 ,  H01M50/103 ,  H01M50/15 ,  H01M50/209

Abstract: An electrode assembly includes a positive electrode layer, a negative electrode layer, and an separator. The positive electrode layer, negative electrode layer, and separator are wound to form the electrode assembly. The separator wraps on both sides of each positive electrode layer and each negative electrode layer. A current collector of the negative electrode layer is made of a three-dimensional porous metal material. The negative electrode layer includes a first negative electrode section and a second negative electrode section extending along a winding direction and connected to each other. A winding start end of the second negative electrode section is substantially aligned with a winding termination end of the positive electrode layer. A thickness d2 of the second negative electrode section is less than a thickness d1 of the first negative electrode section.