公开(公告)号：US20220085383A1

公开(公告)日：2022-03-17

申请号：US17535690

申请日：2021-11-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xin LIU ,  Shiwen Wang ,  Qisen Huang ,  Cheng Li ,  Mingling Li ,  Jia Peng ,  Xianghui Liu

IPC: H01M4/66

Abstract: The present application discloses a negative electrode current collector, a negative electrode plate, an electrochemical device, and an apparatus. The negative electrode current collector includes a polymer material-based support layer and a copper-based conductive layer disposed on at least one surface of the support layer; wherein a thickness D1 of the copper-based conductive layer, a tensile strength T of the support layer, and a thickness D2 of the support layer satisfy a relational formula 0.01≤(300×D1)/(T×D2)≤0.5. The negative electrode current collector has relatively high mechanics and mechanical properties, good electrical conductivity and current collection performance and low weight, which can improve preparation yield of the negative electrode current collector, the negative electrode plate and the electrochemical device and their reliability during use, and is beneficial to enabling the electrochemical device to have relatively high electrochemical performance and gravimetric energy density.

公开(公告)号：US20240213481A1

公开(公告)日：2024-06-27

申请号：US18587996

申请日：2024-02-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Cheng Li ,  Huihui Liu ,  Lianwei Duan

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/485 ,  H01M10/052

CPC classification number: H01M4/622 ,  H01M4/485 ,  H01M4/625 ,  H01M10/052 ,  H01M2004/028

Abstract: The present application provides a binder, a preparation method therefor, a secondary battery, a battery module, a battery pack, and a power consuming device. The binder comprises a polymer comprising structural units derived from a monomer represented by formula I and structural units derived from a monomer represented by formula II, wherein R1 and R2 are each independently selected from hydrogen or substituted or unsubstituted C1-5 alkyl, R3 is selected from hydrogen or methyl, and R4 is selected from substituted or unsubstituted C1-9 alkyl. The binder can be coated on the surface of the positive electrode active material, which is beneficial to maintain the structural integrity of the positive electrode active material during the cycling of the positive electrode plate, thereby improving the cycling performance of the battery.

公开(公告)号：US20230361403A1

公开(公告)日：2023-11-09

申请号：US18343758

申请日：2023-06-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M50/209 ,  G01R31/52 ,  H01M4/66 ,  H01M4/62 ,  H01M50/463

CPC classification number: H01M50/209 ,  G01R31/52 ,  H01M4/661 ,  H01M4/621 ,  H01M50/463 ,  H01M2220/20 ,  H01M2004/028

Abstract: A battery cell, a battery module, a battery pack, and an electrical apparatus are provided. The battery cell includes an intermediate portion and side portions located on two sides of the intermediate portion in a thickness direction, the intermediate portion comprising m battery cell sub-units and the side portions comprising n battery cell sub-units, where m+n is an integer greater than or equal to 3. Each of the battery cell sub-units comprises a positive electrode sheet, a negative electrode sheet and a separator arranged between the positive electrode sheet and the negative electrode sheet, and each of the m battery cell sub-units has a dry battery cell nail penetration short-circuit resistance greater than that of each of the n battery cell sub-units.

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.

公开(公告)号：US20210313567A1

公开(公告)日：2021-10-07

申请号：US17345159

申请日：2021-06-11

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Changliang SHENG ,  Shiwen Wang ,  Qisen Huang ,  Cheng Li ,  Chengdu Liang

IPC: H01M4/38 ,  H01M10/0525

Abstract: The present application discloses a negative electrode plate, an electrode assembly, a lithium ion battery, preparation process thereof, and apparatus containing lithium-ion battery. The negative electrode plate includes a negative electrode active material layer comprising a negative electrode active material, the negative electrode active material comprising a silicon-based material; a binder-free inorganic dielectric layer disposed on one side of the negative electrode active material layer away from the negative electrode current collector, the inorganic dielectric layer comprising an inorganic dielectric material, and the inorganic dielectric layer including at least a main body portion disposed on the surface of the negative electrode active material layer, the main body portion having a channel penetratingly arranged along a thickness direction of the main body portion; and a lithium metal layer disposed on the surface of the inorganic dielectric layer away from the negative electrode active material layer.

公开(公告)号：US12095082B2

公开(公告)日：2024-09-17

申请号：US17345159

申请日：2021-06-11

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Changliang Sheng ,  Shiwen Wang ,  Qisen Huang ,  Cheng Li ,  Chengdu Liang

IPC: H01M4/38 ,  H01M4/04 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/36 ,  H01M4/48 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0562 ,  H01M4/02

CPC classification number: H01M4/386 ,  H01M4/0404 ,  H01M4/0447 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/366 ,  H01M4/382 ,  H01M4/483 ,  H01M4/62 ,  H01M4/628 ,  H01M10/0525 ,  H01M10/0562 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2200/00

Abstract: The present application discloses a negative electrode plate, an electrode assembly, a lithium ion battery, preparation process thereof, and apparatus containing lithium-ion battery. The negative electrode plate includes a negative electrode active material layer comprising a negative electrode active material, the negative electrode active material comprising a silicon-based material; a binder-free inorganic dielectric layer disposed on one side of the negative electrode active material layer away from the negative electrode current collector, the inorganic dielectric layer comprising an inorganic dielectric material, and the inorganic dielectric layer including at least a main body portion disposed on the surface of the negative electrode active material layer, the main body portion having a channel penetratingly arranged along a thickness direction of the main body portion; and a lithium metal layer disposed on the surface of the inorganic dielectric layer away from the negative electrode active material layer.

公开(公告)号：US20240300763A1

公开(公告)日：2024-09-12

申请号：US18668266

申请日：2024-05-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chong Xu ,  Cheng Li ,  Jianrui Yang

IPC: B65H18/28 ,  H01M10/04

CPC classification number: B65H18/28 ,  H01M10/0409 ,  H01M10/0431 ,  B65H2511/20 ,  B65H2511/411 ,  B65H2701/19

Abstract: A separator roll, an electrode assembly, a battery cell, a battery, and an electric device are provided. The separator roll includes a separator body and a warning coating. The separator body has a head end and a tail end in a length direction and is constructed to be capable of winding in the length direction to form the separator roll with the tail end as a roll core. The warning coating is provided on the separator body. The warning coating is configured to be spaced from the tail end by a first preset length. In this way, the warning coating provides a warning in advance for the position of the tail end of the separator body on which the warning coating is located.

公开(公告)号：US20240194882A1

公开(公告)日：2024-06-13

申请号：US18411027

申请日：2024-01-12

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Cheng Li ,  Zipeng Zeng ,  Huihui Liu

IPC: H01M4/62 ,  C08F292/00 ,  H01M4/13

CPC classification number: H01M4/623 ,  C08F292/00 ,  H01M4/13 ,  H01M2004/028

Abstract: The present application provides a conductive binder, the conductive binder is formed by reacting polyimide with a conductive agent, and the conductive binder comprises a structural unit represented by formula I containing trifluoromethyl,




wherein, R1 and R2 are each independently selected from substituted C6-C25 aromatic groups. For the conductive binder, in the case of a low content of conductive agent and a low amount of conductive binder added, it can greatly reduce the membrane resistance, improve the adhesion of the electrode plate and the cycling capacity retention rate of the battery, and reduce the internal resistance increase rate of the battery in the cycling process.

公开(公告)号：US11705556B2

公开(公告)日：2023-07-18

申请号：US18056248

申请日：2022-11-16

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xin Liu ,  Qisen Huang ,  Mingling Li ,  Xianghui Liu ,  Cheng Li ,  Jia Peng ,  Chengdu Liang

IPC: H01M4/66 ,  H01M4/04 ,  H01M50/46 ,  H01M4/02

CPC classification number: H01M4/667 ,  H01M4/0404 ,  H01M50/46 ,  H01M2004/028

Abstract: A positive electrode current collector and a positive electrode plate, a battery, a battery module, a battery pack, and an apparatus including the positive electrode current collector are provided. In some embodiments, a positive electrode current collector is provided, including an organic support layer and an aluminum-based conductive layer disposed on at least one surface of the organic support layer, where the aluminum-based conductive layer contains Al and at least one modifying element selected from O, N, F, B, S, and P, an XPS spectrogram of the aluminum-based conductive layer with a surface passivation layer removed through etching has at least a first peak falling in a range of 70 eV to 73.5 eV and a second peak falling in a range of 73.5 eV to 78 eV, and a ratio x of peak intensity of the second peak to that of the first peak satisfies 0

公开(公告)号：US11289694B2

公开(公告)日：2022-03-29

申请号：US16452543

申请日：2019-06-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Huafeng Huang ,  Changliang Sheng ,  Cheng Li ,  Qisen Huang

IPC: H01M4/1393 ,  H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1391 ,  H01M4/64 ,  H01M10/0525 ,  H01M4/02

Abstract: The invention refers to negative electrode plate, preparation method thereof and electrochemical device. The negative electrode plate comprises: a negative current collector, a negative active material layer, and an inorganic dielectric layer which are provided in a stacked manner; the negative active material layer comprises opposite first surface and second surface, wherein the first surface is disposed away from the negative current collector; the inorganic dielectric layer is disposed on the first surface of the negative active material layer. The negative electrode plate provided by the application is useful in an electrochemical device, and can result in an electrochemical device having simultaneously excellent safety performance and cycle performance.