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公开(公告)号：US20230378799A1
公开(公告)日：2023-11-23
申请号：US18361906
申请日：2023-07-31
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Chenghua FU , Shaocong OUYANG , Baoyun XU , Xiaojian HUANG , Yonghuang YE , Wenjian MA
CPC classification number: H02J7/02 , H02J7/0048
Abstract: A charge method includes obtaining a temperature of a battery, and in response to the temperature of the battery being lower than a preset temperature threshold, determining to use a first charge current to charge the battery until the battery meets a preset condition, and then determining to use a second charge current to charge the battery. The first charge current is used for heating the battery during charging, and the first charge current is greater than the second charge current.
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公开(公告)号：US20230207938A1
公开(公告)日：2023-06-29
申请号：US18117400
申请日：2023-03-04
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Shaocong OUYANG , Chenghua FU , Miaomiao DONG , Yonghuang YE , Changfeng BIE
IPC: H01M50/204 , H01M4/525 , H01M4/505 , H01M10/44
CPC classification number: H01M50/204 , H01M4/525 , H01M4/505 , H01M10/441 , H01M2220/20 , H01M2004/028
Abstract: A battery pack may comprise a first battery cell type and a second battery cell type, wherein the first battery cell type may include n first battery cells, and the second battery cell type may include m second battery cells, with n and m being each independently selected from an integer of 1 or more. The second battery cell may have an internal resistance less than that of the first battery cell, the difference in internal resistance between the first battery cell and the second battery cell may be ≥0.15 mohm; the percentage by number of the first battery cells in the battery cells comprised in the area A may be 20% to 100%; and the percentage by number of the second battery cells in the battery cells comprised in the area B may be 5% to 100%.
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3.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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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
6.发明公开公开(公告)号：US20230317933A1
公开(公告)日：2023-10-05
申请号：US18331696
申请日：2023-06-08
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Baoyun XU , Shaocong OUYANG , Chenghua FU
CPC classification number: H01M4/366 , H01M4/587 , H01M4/625 , H01M4/133 , H01M4/386 , H01M4/134 , H01M2004/028
Abstract: A positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer coated on at least one surface of the positive electrode current collector. The positive electrode active material layer includes an inner active material layer and an outer active material layer successively stacked. The inner active material layer has a three-level pore size distribution: an inner primary pore size distribution from 3 nm to 10 nm, an inner secondary pore size distribution from 10 nm to 100 nm, and an inner tertiary pore size distribution from 0.1 μm to 2 μm. The outer active material layer has a three-level pore size distribution: an outer primary pore size distribution from 0.5 nm to 3 nm, an outer secondary pore size distribution from 10 nm to 100 nm, and an outer tertiary pore size distribution from 0.1 μm to 2 μm.
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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：US20240055610A1
公开(公告)日：2024-02-15
申请号：US18383542
申请日：2023-10-25
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Chang ZHU , Shaocong OUYANG , Baoyun XU , Tingzhen XIE
IPC: H01M4/62 , H01M50/204
CPC classification number: H01M4/62 , H01M50/204 , H01M2004/028
Abstract: A battery pack and an electric device including the battery pack. The battery pack includes a battery pack container and first, second and third battery cells accommodated in different regions of the battery pack container, the first, second and third battery cells each has a first and a second discharge voltage plateau, an average discharge voltage of the first discharge voltage plateau is higher than an average discharge voltage of the second discharge voltage plateau, and the first, second and third battery cells have different proportions of the discharge capacity corresponding to the second discharge voltage plateau.
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公开(公告)号：US20230129961A1
公开(公告)日：2023-04-27
申请号：US17985941
申请日：2022-11-14
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Baoyun XU , Shaocong OUYANG , Chenghua FU
Abstract: The battery pack may include a battery pack case and battery cells accommodated in the battery pack case. In each of the first battery cell, the second battery cells, and the third battery cells, when the 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 percentage of the discharge capacity corresponding to the second discharge voltage plateau of the third battery cells may be larger than a percentage of the discharge capacity corresponding to the second discharge voltage plateau of the second battery cells, which may be larger than a percentage of the discharge capacity corresponding to the second discharge voltage plateau of the first battery cell.
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公开(公告)号：US20220384800A1
公开(公告)日：2022-12-01
申请号：US17864483
申请日：2022-07-14
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Shaocong OUYANG , Chenghua FU , Tingzhen XIE , Bo WANG
IPC: H01M4/505 , H01M4/04 , H01M10/0525 , H01M4/525
Abstract: A lithium manganate positive electrode active material, comprising a lithium manganate matrix and a cladding layer as a “barrier layer” and a “functional layer” are described. The cladding layer can not only “prevent” the transition metal ions which have been produced by the lithium manganate matrix from directly “running” into the electrolyte solution, but also “prevent” the hydrofluoric acid in the electrolyte solution from directly contacting with the lithium manganate substrate, and then prevent the lithium manganate matrix from dissolving out more transition metal manganese ions; as a “functional layer”, the cladding layer contains various effective ingredients inside, which can reduce the transition metal manganese ions already present inside the battery through chemical reactions or adsorption effects, thus slowing down the generation of transition metal manganese and the decomposition of the SEI film (solid electrolyte interphase film) catalyzed by the transition metal manganese.
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