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1.发明公开公开(公告)号：US20240124699A1
公开(公告)日：2024-04-18
申请号：US18515290
申请日：2023-11-21
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Lianwei Duan , Huihui Liu , Cheng Li , Wei Feng
CPC classification number: C08L27/16 , C08L33/08 , H01M4/5825 , H01M4/623 , H01M4/625 , H01M2004/028
Abstract: Provided are a binder composition, an electrode, a battery and a power consuming device. The binder composition comprises a fluoropolymer A and a copolymer B, wherein the copolymer B comprises a structural unit derived from a monomer containing a cyano group and a structural unit derived from a monomer containing an ester group. The binder of the present application has a strong bonding force, and the cycling performance of the secondary battery comprising same is excellent.
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公开(公告)号：US20250007120A1
公开(公告)日：2025-01-02
申请号：US18430656
申请日：2024-02-02
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Long Wang , Huihui Liu , Siying Huang , Yaohui Wang
IPC: H01M50/536
Abstract: Disclosed is an adhesive tape for an electrode tab, which includes a base-material layer and an adhesive layer. The adhesive layer includes a thick region and a thin region which extend from a side edge of the adhesive tape in a width direction of the adhesive layer, the thick region is distributed along the side edge of the adhesive tape, and an adhesive layer thickness of the thick region is greater than an adhesive layer thickness of the thin region. A ratio of an area of the thin region to an area of the thick region is 1:0.02-0.25, optionally 1:0.025-0.18, and further optionally 1:0.0275-0.125. The adhesive tape covers an edge of the tab to fundamentally prevent contact between the tab and a battery cell body.
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3.发明公开公开(公告)号：US20240258520A1
公开(公告)日：2024-08-01
申请号：US18600785
申请日：2024-03-11
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Cheng Li , Huihui Liu
IPC: H01M4/58 , H01M4/02 , H01M4/62 , H01M10/052
CPC classification number: H01M4/5825 , H01M4/622 , H01M4/625 , H01M10/052 , H01M2004/028
Abstract: Provided is a positive electrode slurry, a secondary battery, a battery module, a battery pack and a power consuming device. The positive electrode slurry comprises a positive electrode active substance, a conductive agent and a binder, wherein the binder comprises a polymer A, and the polymer A comprises a structural unit derived from a monomer containing a cyano group, a structural unit derived from a monomer containing an amide group, and a structure unit derived from a monomer containing an ester group. In the present invention, the polymer A is used as the binder of the positive electrode slurry, such that the stability and processability of the positive electrode slurry are improved, and the adhesive force of the positive electrode plate is increased.
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公开(公告)号：US10818961B2
公开(公告)日：2020-10-27
申请号：US15918866
申请日：2018-03-12
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Huihui Liu , Jirong Li , Chao Guo , Jialong Wu , Kang Wang
IPC: H01M10/0525 , H01M4/62 , H01M4/525 , C08L9/02 , C08L33/24 , C08L33/06 , H01M4/505 , H01M4/1391 , H01M4/131 , H01M4/04 , H01M4/66 , H01M4/02
Abstract: The present disclosure provides an anode electrode slurry suspending agent, an anode electrode plate and an energy storage device, the anode electrode slurry suspending agent has a structural formula composed of a main chain containing carbon and a side chain, the side chain comprises a first side chain R1 and a second side chain R2; the first side chain R1 contains —R11—CONH2, the second side chain R2 contains —(C═O)OR21 or —O(C═O)R22, the anode electrode slurry suspending agent can significantly improve coating speed of the anode electrode slurry and can ensure that there is no drying-cracking phenomenon of the anode electrode film at the same time, thereby improving productivity and quality rate of coating process of the anode electrode plate and in turn significantly improving production capacity of the energy storage device.
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公开(公告)号：US20200161659A1
公开(公告)日：2020-05-21
申请号：US16426867
申请日：2019-05-30
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Wei Li , Haihao Shi , Huihui Liu , Chao Jin , Jianbao Xu , Shisong Li , Chao Guo
Abstract: The present invention relates to a positive electrode plate and an electrochemical device. The positive electrode plate includes a current collector, a positive active material layer, and a binding layer disposed between the current collector and the positive active material layer, the binding layer comprising a polymer material, a conductive material, and an inorganic filler, wherein the polymer material comprises a binding layer matrix and the binding layer matrix is an oil-dispersible polymer material having a solubility in NMP at 130 ° C. for 5 minutes, which is 30% or less of the solubility of PVDF under the same conditions. The positive electrode plate can improve the safety performance of the electrochemical device (for example, a capacitor, a primary battery, a secondary battery, or the like) under abnormal conditions such as nailing penetration.
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Patent Agency Ranking
6.发明公开公开(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.
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公开(公告)号：US11888150B2
公开(公告)日：2024-01-30
申请号：US18354618
申请日：2023-07-18
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Huihui Liu , Lingyun Feng , Yanhuang Fan , Lianwei Duan
CPC classification number: H01M4/136 , H01M4/366 , H01M4/583 , H01M4/5825 , H01M4/622 , H01M4/625 , H01M2004/021 , H01M2004/028
Abstract: A positive electrode plate includes a positive electrode current collector, a positive electrode film layer arranged on at least one surface of the positive electrode current collector, and a conductive undercoat layer positioned between the positive electrode current collector and the positive electrode film layer. The positive electrode film layer includes a positive electrode active material including an inner core and a shell coating the inner core. The shell includes a first coating layer coating the inner core, a second coating layer coating the first coating layer, and a third coating layer coating the second coating layer. The conductive undercoat layer includes a polymer, an aqueous binder, and a conductive agent.
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公开(公告)号：US11050053B2
公开(公告)日：2021-06-29
申请号：US16422872
申请日：2019-05-24
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Wei Li , Haihao Shi , Huihui Liu , Chao Jin , Tianyi Gao , Jianbao Xu , Shisong Li , Chao Guo
Abstract: The present invention relates to a battery, comprising a positive electrode plate, a separator and a negative electrode plate, wherein the positive electrode plate comprises a positive electrode current collector and at least two layers of positive active materials on at least one surface of the positive electrode current collector in which the underlying positive active material layer in contact with the positive electrode current collector comprises a first positive active material, a first polymer material, and a first conductive material and in which the upper positive active material layer comprises a second positive active material, a second polymer material, and a second conductive material and the first polymer material comprises an oil-dispersible polymer material having a solubility in NMP at 130° C. for 5 minutes, which is 30% or less of the solubility of PVDF under the same conditions. The battery exhibits good safety performance and improved electrical performance.
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公开(公告)号：US20240213484A1
公开(公告)日：2024-06-27
申请号：US18415696
申请日：2024-01-18
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Lianwei Duan , Huihui Liu
CPC classification number: H01M4/623 , H01M4/0404 , H01M2004/021
Abstract: The present application provides a binder, including a polyvinylidene fluoride having a weight average molar mass of 1.5 million to 5.0 million; optionally, the polyvinylidene fluoride has a weight average molar mass of 1.8 million to 3.2 million.
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10.发明公开公开(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.
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