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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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14.发明申请公开(公告)号：US20210151771A1
公开(公告)日：2021-05-20
申请号：US17128124
申请日：2020-12-20
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Chengdu LIANG , Xin Liu , Qisen Huang
IPC: H01M4/66 , H01M10/058 , H01M4/131 , H01M4/70 , H01M4/525
Abstract: The present disclosure provides a negative current collector (10), a negative electrode plate (20), an electrochemical device, and an apparatus. The negative current collector (10) includes a support layer, and a conductive layer (102) disposed on at least one of two opposite surfaces of the support layer (101) in a thickness direction of the support layer; wherein the support layer (101) has a smaller density than the conductive layer (102); the conductive layer (102) has a thickness D1 satisfying 300 nm≤D1≤2 μm, preferably 500 nm≤D1≤1.5 μm; and when the negative current collector (10) has a tensile strain of 1.5%, the conductive layer (102) has a sheet resistance growth rate T satisfying T≤5%.
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公开(公告)号：US10910652B2
公开(公告)日：2021-02-02
申请号：US16209459
申请日：2018-12-04
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Chengdu Liang , Xin Liu , Zuyu Wu , Qisen Huang
IPC: H01M4/66 , H01M10/0525 , H01M4/02 , H01M4/75
Abstract: A current collector, an electrode plate, and an electrochemical device are provided in the present disclosure. The current collector includes an insulation layer and at least one conductive layer. The insulation layer is used to support the conductive layer. The at least one conductive layer is used to support an electrode active material layer and is located above at least one surface of the insulation layer. The insulation layer has a density smaller than that of the conductive layer. A metal protective layer is arranged on at least one surface of each of the at least one conductive layer.
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Patent Agency Ranking
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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17.发明授权公开(公告)号：US11476469B2
公开(公告)日：2022-10-18
申请号：US17128124
申请日：2020-12-20
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Chengdu Liang , Xin Liu , Qisen Huang
Abstract: The present disclosure provides a negative current collector (10), a negative electrode plate (20), an electrochemical device, and an apparatus. The negative current collector (10) includes a support layer, and a conductive layer (102) disposed on at least one of two opposite surfaces of the support layer (101) in a thickness direction of the support layer; wherein the support layer (101) has a smaller density than the conductive layer (102); the conductive layer (102) has a thickness D1 satisfying 300 nm≤D1≤2 μm, preferably 500 nm≤D1≤1.5 μm; and when the negative current collector (10) has a tensile strain of 1.5%, the conductive layer (102) has a sheet resistance growth rate T satisfying T≤5%.
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公开(公告)号：US10985377B2
公开(公告)日：2021-04-20
申请号：US16366505
申请日：2019-03-27
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Chengdu Liang , Huafeng Huang , Qisen Huang , Xin Liu
Abstract: The present disclosure relates to the technical field of battery, and in particular, relates to a current collector, an electrode plate including the current collector, and an electrochemical device. The current collector includes an insulation layer; and a conductive layer at least located on at least one surface of the insulation layer. The conductive layer has a room temperature thin film resistor of RS, where 0.01Ω/□≤RS≤0.15Ω/□. The current collector is provided with a plurality of holes penetrating through the insulation layer and the conductive layer.
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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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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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