公开(公告)号：US20240021879A1

公开(公告)日：2024-01-18

申请号：US18471322

申请日：2023-09-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Meng Qin ,  Qisen Huang

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0567

CPC classification number: H01M10/0569 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0567 ,  H01M2220/20 ,  H01M2300/0034

Abstract: Provided are an electrolyte solution, comprising an organic solvent, an electrolyte lithium salt, and an additive; wherein the organic solvent comprises a fluorinated solvent; the electrolyte lithium salt comprises a fluorine-containing sulfonylimide lithium salt; and the additive comprises a lithium halide salt. The electrolyte solution of the present application has good conductivity and flame retardancy, and a lithium-ion battery comprising the electrolyte solution has at least one of improved energy density, safety performance, output performance, and cycling performance.

公开(公告)号：US11791472B2

公开(公告)日：2023-10-17

申请号：US18314158

申请日：2023-05-09

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xin Liu ,  Qisen Huang ,  Mingling Li ,  Xianghui Liu ,  Jia Peng ,  Cheng Li ,  Meng Qin

IPC: H01M4/66

CPC classification number: H01M4/667 ,  H01M4/661 ,  H01M4/666

Abstract: A positive current collector, a secondary battery, and an electrical device are provided. In some embodiments, the positive current collector includes: a support layer; and a conductive layer located on at least one surface of the support layer, where the conductive layer includes a first metal portion configured to connect to a tab, where, along a thickness direction of the conductive layer, the first metal portion includes at least three sublayers, and melting points of the at least three sublayers rise stepwise in ascending order of distance from the support layer. In the embodiments of this application, the first metal portion includes at least three sublayers, and the melting points of the at least three sublayers rise stepwise in ascending order of distance from the support layer, thereby helping increase a bonding force between the conductive layer and the support layer and reducing the probability of peel-off and delamination between the layers.

公开(公告)号：US20240413408A1

公开(公告)日：2024-12-12

申请号：US18810528

申请日：2024-08-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Meng Qin ,  Yingjie Guan ,  Qingyan Ma ,  Huiling Yang ,  Yan Wen ,  Qisen Huang

IPC: H01M10/42 ,  H01M4/02 ,  H01M4/587 ,  H01M10/0568 ,  H01M10/0569

Abstract: Provided is a secondary battery including a positive electrode plate, a negative electrode plate, and an electrolyte. The positive electrode plate includes a positive current collector and a positive active material layer arranged on the positive current collector, and the positive active material layer contains a sodium ion active material. The negative electrode plate includes a negative current collector and a negative film layer arranged on at least one surface of the negative current collector, and the negative film layer contains a carbon material. The electrolyte is arranged between the positive electrode plate and the negative electrode plate, and the electrolyte contains a sodium borate.

公开(公告)号：US20240413399A1

公开(公告)日：2024-12-12

申请号：US18810521

申请日：2024-08-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Meng Qin ,  Yingjie Guan ,  Qingyan Ma ,  Huiling Yang ,  Yan Wen ,  Qisen Huang

IPC: H01M10/0567 ,  H01M4/04 ,  H01M4/62 ,  H01M10/054 ,  H01M10/0569 ,  H01M50/249

Abstract: Provided is a secondary battery including a positive electrode plate, a negative electrode plate, and an electrolyte. The positive electrode plate includes a positive current collector and a positive active material layer arranged on the positive current collector, and the positive active material layer contains a sodium ion active material. The negative electrode plate includes a negative current collector and a metal film layer arranged on at least one surface of the negative current collector. A nucleation overpotential of sodium on the negative electrode plate is smaller than or equal to 35 mV. The electrolyte is arranged between the positive electrode plate and the negative electrode plate, and the electrolyte contains a sodium borate.

公开(公告)号：US20230282838A1

公开(公告)日：2023-09-07

申请号：US18314158

申请日：2023-05-09

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xin Liu ,  Qisen Huang ,  Mingling Li ,  Xianghui Liu ,  Jia Peng ,  Cheng Li ,  Meng Qin

IPC: H01M4/66

CPC classification number: H01M4/667 ,  H01M4/661 ,  H01M4/666

Abstract: A positive current collector, a secondary battery, and an electrical device are provided. In some embodiments, the positive current collector includes: a support layer; and a conductive layer located on at least one surface of the support layer, where the conductive layer includes a first metal portion configured to connect to a tab, where, along a thickness direction of the conductive layer, the first metal portion includes at least three sublayers, and melting points of the at least three sublayers rise stepwise in ascending order of distance from the support layer. In the embodiments of this application, the first metal portion includes at least three sublayers, and the melting points of the at least three sublayers rise stepwise in ascending order of distance from the support layer, thereby helping increase a bonding force between the conductive layer and the support layer and reducing the probability of peel-off and delamination between the layers.