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11.发明申请公开(公告)号：US20220085380A1
公开(公告)日：2022-03-17
申请号：US17537516
申请日：2021-11-30
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Xin LIU , Qisen HUANG , Shiwen WANG , Changliang SHENG , Jia PENG , Mingling LI , Xianghui LIU
Abstract: The present application discloses a negative electrode current collector, a negative electrode plate and an electrochemical device. The negative electrode current collector includes an organic support layer and a copper-based conductive layer disposed on at least one surface of the organic support layer; and a copper-based crystal grain size in the copper-based conductive layer is from 10 nm to 500 nm. The negative electrode current collector provided by the present application has good mechanics properties while having less weight and good electrical conductivity and current collection performance, which can improve preparation yields of the negative electrode current collector, the negative electrode plate and the electrochemical device and their safety and reliability during use, and enables the electrochemical device to have relatively high gravimetric energy density and good electrochemical performance.
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公开(公告)号：US20210143440A1
公开(公告)日：2021-05-13
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 , H01M10/0525 , H01M10/0569 , H01M10/0567 , H01M4/587 , H01M4/58 , H01M4/133 , H01M4/136 , H01M4/62 , C07C317/12
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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公开(公告)号：US20220209226A1
公开(公告)日：2022-06-30
申请号：US17697930
申请日：2022-03-18
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Cheng LI , Qisen HUANG , Xin LIU , Changliang SHENG , Shiwen WANG , Xianghui LIU , Jia PENG , Mingling LI , Chengdu LIANG
Abstract: This application relates to a negative electrode plate, a secondary battery and apparatus thereof. The secondary battery of the present application comprises a negative electrode plate, the negative electrode plate comprises a composite current collector and a negative electrode active material layer disposed on at least one surface of the composite current collector, the negative electrode active material layer comprises a silicon-based active material, the silicon-based active material accounts for 0.5 wt % to 50 wt % of total mass of the negative electrode active material layer, and the composite current collector comprises a polymer support layer and a metal conductive layer disposed on at least one surface of the polymer support layer, and the composite current collector has a brittleness parameter C ranging from 0.03 to 0.5. The secondary battery and the negative electrode plate achieve good coordination between the current collector and the negative electrode active material layer.
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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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Patent Agency Ranking
15.发明申请公开(公告)号：US20220085379A1
公开(公告)日：2022-03-17
申请号：US17536103
申请日：2021-11-29
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Xin LIU , Shiwen WANG , Qisen HUANG , Cheng LI , Mingling Ll , Jia PENG , Xianghui LIU
IPC: H01M4/66 , H01M4/36 , H01M10/0525
Abstract: The present application discloses a positive electrode current collector, a positive electrode plate, an electrochemical device, and an apparatus. The positive electrode current collector includes a polymer material-based support layer and an aluminum-based conductive layer disposed on at least one surface of the support layer; a thickness D1 of the aluminum-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≤(200×D1)/(T×D2)≤0.5, in the formula D1 and D2 are in the same unit, and T is in MPa. The positive 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 positive electrode current collector, the positive electrode plate and the electrochemical device and their reliability during use.
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公开(公告)号：US20190305319A1
公开(公告)日：2019-10-03
申请号：US16364751
申请日：2019-03-26
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Chengdu LIANG , Huafeng HUANG , Qisen HUANG , Xin LIU
Abstract: The present disclosure relates to the field of batteries and, specifically, to a current collector comprising a support layer, a conductive layer and a conductive material. The conductive layer is located on two surfaces of the support layer. A plurality of holes extending through the support layer and the conductive layer is provided in the current collector and is filled with the conductive material. The current collector of the present disclosure can improve the short circuit resistance of the battery using the current collector when a short circuit occurs under abnormal conditions, so that the short circuit current can be greatly reduced, and thus heat generated by the short circuit can be greatly reduced, thereby improving the safety performance of the battery.
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公开(公告)号：US20190173090A1
公开(公告)日：2019-06-06
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 , H01M4/75
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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18.发明公开公开(公告)号：US20240141532A1
公开(公告)日：2024-05-02
申请号：US18540081
申请日：2023-12-14
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Jia PENG , Mingling LI , Xin LIU , Qisen HUANG
Abstract: A negative electrode composite current collector including a copper plating solution is described. The copper plating solution includes a leveling agent represented by a general formula (1)
where an anion X is F−, Cl−, or Br−;
R1, R2, and R3 are each independently selected from O or S; and
R4, R5, and R6 are each independently selected from hydrogen, a substituted or unsubstituted alkyl, a substituted or unsubstituted vinyl, a substituted or unsubstituted aryl, and a substituted or unsubstituted heteroaryl.-
公开(公告)号：US20230112962A1
公开(公告)日：2023-04-13
申请号：US17984276
申请日：2022-11-10
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Jia PENG , Mingling LI , Xin LIU , Qisen HUANG
Abstract: The present disclosure relates to a composite positive electrode current collector. On a surface of an insulation layer, a protective layer, a graphene metallization layer and a conductive layer may be arranged in sequence; and the protective layer may comprise a metal oxide, and the graphene metallization layer may contain highly reduced graphene oxide having an oxygen-containing organic group.
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