公开(公告)号：US20240145794A1

公开(公告)日：2024-05-02

申请号：US18409803

申请日：2024-01-11

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xingbu CHEN ,  Yonghuang YE ,  Xin SUN ,  Lili WU ,  Rundie LIU ,  Xuan LI ,  Miaomiao DONG ,  Liang YUN ,  Peidong SONG

IPC: H01M10/42

CPC classification number: H01M10/4242 ,  H01M2220/20

Abstract: Lithium replenishing spaces are disposed on a current collection structure, such that the lithium replenishing spaces communicate with an active layer on one side; and the battery is replenished with lithium by using lithium replenishing agents in the lithium replenishing spaces to offset an irreversible lithium consumption in a cycle process, so as to increase the total capacity and the energy density of the battery. According to the present application, due to average weights MA of corresponding active materials in different distribution regions on the active layer, a sum V0 of internal volumes of lithium replenishing spaces corresponding to each of the distribution regions is controlled in a positively correlated manner based on a change in the average weights of the active materials in the different distribution regions.

公开(公告)号：US20240014435A1

公开(公告)日：2024-01-11

申请号：US18466819

申请日：2023-09-13

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xingbu CHEN ,  Xin SUN ,  Lili WU ,  Miaomiao DONG ,  Xuan LI ,  Liang YUN ,  Rundie LIU ,  Peidong SONG

IPC: H01M10/04 ,  H01M50/536 ,  H01M4/38 ,  H01M50/538 ,  H01M4/134 ,  H01M10/0525

CPC classification number: H01M10/0431 ,  H01M50/536 ,  H01M4/382 ,  H01M50/538 ,  H01M4/134 ,  H01M10/0525 ,  H01M2004/027

Abstract: A compound electrode sheet includes two single electrode sheets, and each single electrode sheet includes a current collector and an active material layer. The current collector is provided with a main body and a protrusion portion, and the protrusion portion is arranged protruding out of the main body in an extension direction of the current collector. The active material layer is arranged on a surface of the main body. The protrusion portions of the two current collectors of the two single electrode sheets are fixedly connected. The active material layers of the two single electrode sheets are arranged opposite to each other.

公开(公告)号：US20230395778A1

公开(公告)日：2023-12-07

申请号：US18234891

申请日：2023-08-17

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xin SUN ,  Haotian XIE ,  Xiao CHEN ,  Donghao WANG ,  Erdong JING

IPC: H01M4/134 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/66

CPC classification number: H01M4/134 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/661 ,  H01M2004/028

Abstract: This application provides a positive electrode plate for lithium-ion battery and a lithium-ion battery containing the same. The positive electrode plate may include a current collector, and a capacity layer and a power layer that are specially designed, able to effectively eliminate, in an economical and simple manner, the adverse impact on the battery performance caused by a product resulting from a pre-lithiation material releasing lithium during charge-discharge cycles, thereby significantly improving the first-cycle coulombic efficiency, cycling performance, and service life of batteries.

公开(公告)号：US20230207812A1

公开(公告)日：2023-06-29

申请号：US18074416

申请日：2022-12-02

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Bangrun WANG ,  Na LIU ,  Chengdu LIANG ,  Yongchao LIU ,  Xin SUN ,  Haotian XIE

IPC: H01M4/62 ,  H01M4/525 ,  H01M10/052 ,  H01M4/131 ,  C01G53/00

CPC classification number: H01M4/62 ,  H01M4/525 ,  H01M10/052 ,  H01M4/131 ,  C01G53/50 ,  H01M2004/028

Abstract: This application discloses a lithium supplement for lithium secondary batteries, a preparation method thereof, and a lithium secondary battery, a battery module, a battery pack, and an apparatus. Tests show that the lithium supplement of this application can maintain its own stability and low metal dissolution during long-term use of lithium secondary batteries, effectively improving energy density of lithium secondary batteries and ensuring a low self-discharge rate of lithium secondary batteries, thereby ensuring that the lithium secondary battery has high energy density, long cycle life, and high safety.

公开(公告)号：US20240162525A1

公开(公告)日：2024-05-16

申请号：US18422038

申请日：2024-01-25

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jiantao HUANG ,  Xin SUN ,  Huanji LIU ,  Xiao CHEN ,  Haizu JIN

IPC: H01M10/654 ,  H01M50/209 ,  H01M50/48 ,  H01M50/494

CPC classification number: H01M10/654 ,  H01M50/209 ,  H01M50/48 ,  H01M50/494 ,  H01M2220/20

Abstract: An electrode assembly, a secondary battery, a battery pack, and an electrical apparatus. In the electrode assembly, there are several electrode plate portions sequentially arranged in a laminated manner along its own thickness direction. During structural design, the current collector in at least one of the electrode plate portions is configured as a barrier, and by controlling the ratio between the thermal conductivity λ0 of the barrier and the thickness d0 of the barrier to be less than 3×107 W/(K*m2), the heat flux density of the barrier along the thickness direction of the electrode assembly is reduced and the thermal resistance is increased, thus forming an effective thermal barrier in the thickness direction of the electrode assembly.

公开(公告)号：US20240128538A1

公开(公告)日：2024-04-18

申请号：US18509008

申请日：2023-11-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huanji LIU ,  Yangfang LING ,  Jiantao HUANG ,  Xin SUN ,  Haizhu JIN

IPC: H01M10/654 ,  H01M10/04 ,  H01M10/658 ,  H01M50/103 ,  H01M50/124 ,  H01M50/457 ,  H01M50/46 ,  H01M50/463 ,  H01M50/489

CPC classification number: H01M10/654 ,  H01M10/0431 ,  H01M10/658 ,  H01M50/103 ,  H01M50/1243 ,  H01M50/457 ,  H01M50/46 ,  H01M50/463 ,  H01M50/489 ,  H01M2220/20

Abstract: An electrode assembly, a battery cell, a battery, and an electrical device are provided. The electrode assembly includes: a plurality of electrode plates, each of the plurality of electrode plates having a first side and a second side which are oppositely arranged along a first direction, and at least one of the first side and the second side being provided with a tab; and a separator, arranged alternately with a plurality of electrode plates. The separator is configured to be thermally insulated on at least one of the first side and the second side; and/or the separator is configured to be thermally insulated on an outermost layer of the plurality of electrode plates.

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.

公开(公告)号：US20240097280A1

公开(公告)日：2024-03-21

申请号：US18522292

申请日：2023-11-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xingbu CHEN ,  Lili WU ,  Xin SUN ,  Huisen SU ,  Jianren WEI ,  Xuan LI

IPC: H01M50/477 ,  H01M50/48 ,  H01M50/531

CPC classification number: H01M50/477 ,  H01M50/48 ,  H01M50/531 ,  H01M2220/20

Abstract: A battery cell may include an electrode assembly and a buffer pad, where the electrode assembly may include a main body portion and a tab extending from the main body portion, the main body portion may include a first main body region and a second main body region, and the thickness of the first main body region along a first direction (T) may be smaller than the thickness of the second main body region along the first direction (T); and where the buffer pad may include a compressible first side wall, the first side wall may include a first buffer portion and a second buffer portion, the thickness of the first buffer portion along the first direction (T) may be greater than the thickness of the second buffer portion along the first direction, and the buffer pad may be provided on a side face of the main body portion.

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.

公开(公告)号：US20230261491A1

公开(公告)日：2023-08-17

申请号：US18295931

申请日：2023-04-05

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Haotian XIE ,  Xingbu CHEN ,  Xin SUN ,  Bangrun Wang ,  Xiao CHEN ,  Na LIU ,  Chengdu LIANG

IPC: H02J7/00 ,  H01M10/44 ,  H01M10/0525 ,  H01M4/62 ,  C01G53/00

CPC classification number: H02J7/0069 ,  H01M10/446 ,  H01M10/0525 ,  H01M4/628 ,  C01G53/42 ,  H02J7/005

Abstract: A method for recovering activity of a battery includes obtaining a battery state-of-health value of the battery during a charging process, applying an activation voltage to the battery in response to the battery state-of-health value being less than or equal to a first preset threshold such that lithium ions at a lithium supplement agent of the battery are released to an electrolyte solution, and stopping application of the activation voltage and continuing a normal charge-discharge cycle in response to the battery state-of-health value increasing to be greater than or equal to a second preset threshold. The activation voltage is higher than a normal charging voltage of the battery.