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1.发明公开公开(公告)号：US20230170472A1
公开(公告)日：2023-06-01
申请号：US18084551
申请日：2022-12-20
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Changfeng BIE , Huan NI , Xue LENG , Miaomiao DONG , Shaocong OUYANG , Na LIU
CPC classification number: H01M4/366 , H01M4/587 , H01M4/525 , H01M4/625 , H01M2004/028
Abstract: A positive electrode plate may include a current collector, a first positive electrode active material layer and a second positive electrode active material layer. The first positive electrode active material layer may comprise a first positive electrode active material, a first binder and a first conductive agent; the second positive electrode active material layer may comprise a second positive electrode active material, a second binder and a second conductive agent. The second positive electrode active material may be selected from carbon-coated LiβFeαM(1−α)PO4, and the second positive electrode active material may have a diffraction peak A between 29° and 30° in the X-ray diffraction pattern, and a diffraction peak B between 25° and 26°, and the intensity ratio IA/IB of the diffraction peaks may satisfy: 0.98≤IA/IB≤1.1.
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2.发明公开公开(公告)号：US20230420671A1
公开(公告)日：2023-12-28
申请号：US18464932
申请日：2023-09-11
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Zehui LIN , Huan NI , Hongyu LIU
IPC: H01M4/525 , H01M4/505 , H01M10/052
CPC classification number: H01M4/525 , H01M4/505 , H01M10/052 , H01M2004/028
Abstract: A positive electrode active material includes an active material A having a composition formula of Lix1Nia1Cob1Mnc1O2-y1Qy1, an active material B having a composition formula of Lix2Nia2Cob2Mnc2O2-y2Qy2, and an active material C having a composition formula of Lix3Nia3Cob3Mnc3O2-y3Qy3, where the subscripts in the formulae are as defined in the description. The active material A has an average particle size Dv50 greater than both an average particle size Dv50 of the active material B and an average particle size Dv50 of the active material C.
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公开(公告)号：US20230327100A1
公开(公告)日：2023-10-12
申请号：US18324592
申请日：2023-05-26
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Huan NI , Changfeng BIE , Xiang YIN , Shaocong OUYANG , Miaomiao DONG , Na LIU
CPC classification number: H01M4/505 , C01G53/50 , H01M4/366 , H01M4/525 , H01M2004/021
Abstract: A single-crystalline-structured low-cobalt ternary positive material, a chemical formula thereof is Li1+x(NiaCobMnc)1-dMdO2-yAy, where a mole fraction of Co element is low. 0.05 ≤ b ≤ 0.14; and in a single particle, a ratio of an average Co content per unit area of an outer layer to an average Co content per unit area of an inner core in a cross section passing through a geometric center of the particle is in a range 1.2-5.0:1, optionally, in a range 1.4-2.0:1 is disclosed. The material has better structural stability and dynamic performance at low temperature and high voltage, which improves cycle performance and power performance of the secondary battery at low temperature and high voltage. A method for preparing the low-cobalt ternary positive material, a secondary battery, a battery module, a battery pack, and a power consumption apparatus including the material is also disclosed
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公开(公告)号：US20240106060A1
公开(公告)日：2024-03-28
申请号：US18503736
申请日：2023-11-07
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Miaomiao DONG , Hongyu LIU , Changfeng BIE , Shaocong OUYANG , Huan NI , Chenghua FU , Xin SUN
IPC: H01M50/267 , H01M4/505 , H01M4/58 , H01M10/44 , H01M10/617 , H01M50/244
CPC classification number: H01M50/267 , H01M4/505 , H01M4/5825 , H01M10/443 , H01M10/617 , H01M50/244 , H01M2010/4292 , H01M2220/20
Abstract: A battery pack includes a battery pack box with an internal space including a first region to an n-th region, each provided with a battery cell. A positive electrode active substance in a positive electrode of each k-th battery cell includes lithium iron phosphate and/or lithium nickel cobalt manganate having a first discharge voltage plateau and one or more types of supplementary active substances having a second discharge voltage plateau. For the first battery cell to the n-th battery cell, in any case where a sum of a discharge capacity corresponding to the first discharge voltage plateau and a discharge capacity corresponding to the second discharge voltage plateau is 100%, a discharge capacity proportion corresponding to the second discharge voltage plateau of the k-th battery cell is greater than a discharge capacity proportion corresponding to the second discharge voltage plateau of the (k−1)-th battery cell.
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公开(公告)号：US20240088460A1
公开(公告)日：2024-03-14
申请号：US18384675
申请日：2023-10-27
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Miaomiao DONG , Shaocong OUYANG , Huan NI , Hongyu LIU , Changfeng BIE , Xin SUN , Chenghua FU
IPC: H01M10/44 , H01M4/136 , H01M10/0525 , H01M50/249
CPC classification number: H01M10/443 , H01M4/136 , H01M10/0525 , H01M10/441 , H01M50/249 , H01M2004/028
Abstract: A battery pack includes a first battery cell, a second battery cell, and a third battery cell. A positive electrode active substance of each battery cell is composed of lithium iron phosphate and a low-temperature additive. The low-temperature additive is selected from compounds containing at least two carbonyl groups, which are conjugated with an unsaturated structure or an atom having lone-pair electrons connected with the carbonyl groups, and a discharging cut-off voltage of the battery pack at a low temperature has the following rules: discharging cut-off voltages V1, V2, and V3 of the first battery cell, second battery cell, and third battery cell range from 1.95V to 2.1V, from 1.8 V to 2.0V, from 1.6V to 1.9V, respectively, and V1, V2, and V3 satisfy a relationship of V1>V2>V3.
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Patent Agency Ranking
公开(公告)号：US20220359874A1
公开(公告)日：2022-11-10
申请号：US17863295
申请日：2022-07-12
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Abstract: This application provides a mixed positive electrode material, a positive electrode plate and a preparation method thereof, a battery, and an apparatus. The mixed positive electrode material includes a mixed component consisting of a material of lithium iron phosphate chemical system and a material of ternary chemical system, where the material of lithium iron phosphate chemical system is secondary particles with an average specific surface area within 10 m2/g. In the mixed positive electrode material of this application, the introduction of lithium iron phosphate secondary particles having a low specific surface area improves ease of processing of the mixed positive electrode material, making a slurry less prone to agglomeration and the two materials highly miscible. When the positive electrode plate is prepared by using the mixed positive electrode material of this application, uniform distribution of the positive electrode material on the positive electrode plate can be effectively improved.
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公开(公告)号：US20180337401A1
公开(公告)日：2018-11-22
申请号：US15976713
申请日：2018-05-10
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Huan NI , Yujun CHEN , Xinliang KUANG , Xuguang GAO , Long WANG , Na LIU
CPC classification number: H01M4/366 , C01B25/36 , C01G53/42 , C01G53/50 , C01P2004/03 , C01P2004/80 , C01P2006/40 , H01M4/0471 , H01M4/131 , H01M4/1391 , H01M4/505 , H01M4/525 , H01M4/628 , H01M10/052 , H01M10/0525 , H01M2004/028 , H01M2220/20
Abstract: The present disclosure provides a preparation method of a modified positive electrode active material preparation method, which comprising steps of: dispersing a positive electrode active material matrix into an alcohol solvent to form a positive electrode active material matrix suspension; dissolving an alcohol-soluble aluminum salt in an alcohol solvent to form an alcohol-soluble aluminum salt solution; dissolving an alcohol-soluble phosphorous compound in an alcohol solvent to form an alcohol-soluble phosphorous compound solution; mixing the alcohol-soluble aluminum salt solution and the alcohol-soluble phosphorous compound solution and heating to react, obtaining a liquid-phase coating solution which contains aluminum phosphate after the reaction is finished; mixing and stirring the positive electrode active material matrix suspension and the liquid-phase coating solution which contains aluminum phosphate, extraction filtrating and obtaining a filter cake after the stirring is finished, then drying and baking the filter cake, finally obtaining a modified positive electrode active material.
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公开(公告)号：US20240363858A1
公开(公告)日：2024-10-31
申请号：US18767006
申请日：2024-07-09
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Miaomiao DONG , Shaocong OUYANG , Changfeng BIE , Hongyu LIU , Huan NI , Chenghua FU , Xin SUN
CPC classification number: H01M4/5825 , H01M4/364 , H01M4/366 , H01M4/382 , H01M4/60 , H01M10/0525 , H01M2004/027 , H01M2004/028
Abstract: The present application provides a secondary battery, a battery module, a battery pack, and an electrical device. The secondary battery includes a positive electrode plate, a negative electrode plate, and a separator disposed between the positive electrode plate and the negative electrode plate, in which the positive electrode plate comprises a positive electrode coating containing a positive electrode active material comprising a lithium iron phosphate material and a conjugated carbonyl compound. In a discharge process of the secondary battery, in addition to a discharge plateau of the lithium iron phosphate material, a discharge curve further includes a relatively low discharge plateau provided by the conjugated carbonyl compound.
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公开(公告)号：US20210167366A1
公开(公告)日：2021-06-03
申请号：US17123544
申请日：2020-12-16
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Xue LENG , Rui DU , Na LIU , Yongchao LIU , Huan NI
IPC: H01M4/36 , H01M10/0525 , H01M4/1315 , H01M4/525 , H01M4/505 , C30B29/22
Abstract: The present application provides a positive electrode sheet for a secondary battery, the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer on a surface of the positive electrode current collector, the positive electrode active material layer includes a positive electrode active material, the positive electrode active material includes a first lithium nickel transition metal oxide and a second lithium nickel transition metal oxide, the first lithium nickel transition metal oxide includes a first substrate and a first coating layer on a surface of the first substrate, the first substrate is secondary particles, and the second lithium nickel transition metal oxide is a single crystal or single-crystal-like morphological particles.
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10.发明申请公开(公告)号：US20180323436A1
公开(公告)日：2018-11-08
申请号：US15968654
申请日：2018-05-01
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Yujun CHEN , Xinliang KUANG , Long WANG , Na LIU , Huan NI
CPC classification number: H01M4/628 , B01J13/08 , H01M4/0404 , H01M4/0471 , H01M4/131 , H01M4/1391 , H01M4/366 , H01M4/505 , H01M4/525 , H01M4/622 , H01M4/624 , H01M10/0525 , H01M2004/028
Abstract: The present disclosure provides a modified positive electrode active material. The modified positive electrode active material comprises a positive electrode active material inner core; a metal oxide layer comprising a metal oxide and coated on a surface of the positive electrode active material inner core; and a polymer layer comprising a polymer and coated on a surface of the metal oxide layer, the polymer being one or more selected from a group consisting of polyacrylic acid, polymethyl methacrylate, polyacrylamide and lithium polyacrylate. The modified positive electrode active material of the present disclosure has better structure stability and thermal stability, when the modified positive electrode active material is applied in the electrochemical energy storage device, cycle performance and safety performance of the electrochemical energy storage device can be significantly improved without decreasing energy density of the electrochemical energy storage device.
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