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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
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
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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
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.
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公开(公告)号：US11784312B1
公开(公告)日：2023-10-10
申请号：US17963140
申请日：2022-10-10
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Mingling Li , Jia Peng , Xin Liu , Cheng Li , Xianghui Liu , Qisen Huang
Abstract: This application provides a current collector and a preparation method thereof, a secondary battery containing such current collector, a battery module, a battery pack, and an electric apparatus. The current collector in this application includes a support layer, a binder layer, and a metal layer, where the binder layer is arranged between the support layer and the metal layer, the binder layer includes an organic binder and inorganic particles, a thickness D0 of the binder layer is 1.0-5.0 μm, optionally 1.0-3.0 μm; and the inorganic particles include large particles with a median particle size D50large and small particles with a median particle size D50small, and the median particle sizes of the large particles and the small particles satisfy the following relationships: D50large>D50small; D50large=(0.5-0.9)×D0; and D50small=(0.1-0.4)×D0.
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公开(公告)号：US11611081B2
公开(公告)日：2023-03-21
申请号：US17128090
申请日：2020-12-19
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Xin Liu , Qisen Huang , Shiwen Wang , Xianghui Liu , Jia Peng , Mingling Li , Changliang Sheng
IPC: H01M4/66 , H01M4/04 , H01M10/0525 , H01M4/02
Abstract: The present disclosure provides a lithium ion secondary battery, a battery core, a negative electrode plate and an apparatus containing the lithium ion secondary battery. The lithium ion secondary battery includes a battery core and an electrolytic solution, the battery core including a positive electrode plate comprising a positive current collector and a positive active material layer, a separator, and a negative electrode plate comprising a negative current collector and a negative active material layer, wherein the positive current collector and/or the negative current collector are a composite current collector, the composite current collector comprises a polymer-based support layer and a conductive layer disposed on at least one surface of the support layer, and the composite current collector has a thermal conductivity in a range of 0.01 W/(m·K) to 10 W/(m·K), preferably in a range of 0.1 W/(m·K) to 2 W/(m·K).
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公开(公告)号：US20240405227A1
公开(公告)日：2024-12-05
申请号：US18636308
申请日：2024-04-16
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Xin Liu , Xianghui Liu , Qisen Huang , Mingling Li , Cheng Li
Abstract: This application provides a composite current collector for positive electrode including a support layer and a conductive layer disposed on at least one side of the support layer. The support layer is an organic support layer. The support layer has a thickness d1, a tensile strength at break T1, a yield strength Q1, and an elastic modulus G1; the conductive layer has a total thickness d2, a tensile strength at break T2, and an elastic modulus G2; and the composite current collector for positive electrode satisfies the following condition: (d1×T1−(d2×T2)×(1−α)−d1×Q1×α)≥800 Pa·m, where α=G1/(G1+G2).
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Patent Agency Ranking
公开(公告)号：US12100843B2
公开(公告)日：2024-09-24
申请号：US18325016
申请日：2023-05-29
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Xin Liu , Qisen Huang , Mingling Li , Xianghui Liu , Cheng Li , Jia Peng , Chengdu Liang
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
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公开(公告)号：US20220085384A1
公开(公告)日：2022-03-17
申请号：US17537520
申请日：2021-11-30
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 composite current collector, an electrode plate and an electrochemical device. The composite current collector includes an organic support layer and a metal conductive layer disposed on at least one surface of the organic support layer; and the composite current collector has a brittleness parameter C of 0.01≤C≤0.5. The composite current collector provided by the present application has relatively high mechanics and mechanical properties which having good electrical conductivity and current collection performance, which can improve preparation yield of the composite current collector, the electrode plate and the electrochemical device and their reliability during use, and enables the electrochemical device to have relatively high electrochemical performance and gravimetric energy density.
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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.
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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
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.
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公开(公告)号：US11646424B2
公开(公告)日：2023-05-09
申请号：US17123268
申请日：2020-12-16
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Xin Liu , Qisen Huang , Shiwen Wang , Xianghui Liu , Jia Peng , Mingling Li , Changliang Sheng
IPC: H01M4/66 , H01M4/587 , H01M4/58 , H01M4/62 , H01M10/0525 , H01M10/0569 , H01M10/0567 , H01M4/133 , H01M4/136 , C07C317/12 , H01M4/02
CPC classification number: H01M4/667 , C07C317/12 , H01M4/133 , H01M4/136 , H01M4/587 , H01M4/5825 , H01M4/628 , H01M10/0525 , H01M10/0567 , H01M10/0569 , H01M2004/021 , H01M2300/0037
Abstract: This application discloses a lithium-ion secondary battery. The lithium-ion secondary battery includes a positive electrode plate, a negative electrode plate, a separator, and an electrolytic solution. The positive electrode plate includes a positive electrode current collector and a positive active material layer disposed on a surface of the positive electrode current collector and containing a positive active material, and the negative electrode plate includes a negative electrode current collector and a negative active material layer disposed on a surface of the negative electrode current collector and containing a negative active material; wherein the positive active material includes lithium iron phosphate, and the negative active material includes graphite; and wherein the positive electrode current collector and/or the negative electrode current collector is a composite current collector, and the composite current collector includes an organic support layer and a conductive layer disposed on at least one surface of the organic support layer.
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