公开(公告)号：US20240379988A1

公开(公告)日：2024-11-14

申请号：US18782953

申请日：2024-07-24

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Suogang GUO ,  Yonghuang YE ,  Guozhong YANG ,  Chenghua FU ,  Chenchen ZHANG

IPC: H01M10/04

Abstract: This application relates to a winding device and a winding method, and pertains to the field of battery manufacturing technology. This application proposes a winding device including: a winding component; and a drawing mechanism, where the drawing mechanism is configured to draw a protruding section of a separator after the separator is led out of the winding component, so that length of the protruding section reaches a preset value. The winding component is configured to start winding after the length of the protruding section reaches the preset value, to form an electrode assembly. This application further proposes a winding method for forming an electrode assembly through winding. The winding device and the winding method are used for forming an electrode assembly with high safety performance through winding, so as to implement industrial production of the electrode assembly and improve manufacturing efficiency of the electrode assembly.

公开(公告)号：US20240332632A1

公开(公告)日：2024-10-03

申请号：US18736645

申请日：2024-06-07

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shaocong OUYANG ,  Chenghua FU ,  Baoyun XU ,  Miaomiao DONG ,  Yonghuang YE

IPC: H01M10/0585 ,  H01M4/02 ,  H01M4/133 ,  H01M10/44 ,  H01M50/204

CPC classification number: H01M10/0585 ,  H01M4/133 ,  H01M10/441 ,  H01M50/204 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20

Abstract: A battery pack may include 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, wherein the second battery cell may have a discharge power at −20° C. greater than that of the first battery cell, the difference in discharge power at −20° C. between the second battery cells and the first battery cells being ≥10 W; the percentage by number of the first battery cells in the battery cells comprised in 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%.

公开(公告)号：US20230231202A1

公开(公告)日：2023-07-20

申请号：US18118756

申请日：2023-03-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shaocong OUYANG ,  Chenghua FU ,  Baoyun XU ,  Miaomiao DONG ,  Yonghuang YE

IPC: H01M10/0585 ,  H01M50/204 ,  H01M4/133 ,  H01M10/44

CPC classification number: H01M10/0585 ,  H01M50/204 ,  H01M4/133 ,  H01M10/441 ,  H01M2220/20 ,  H01M2004/028

Abstract: A battery pack may include 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, wherein the second battery cell may have a discharge power at −20° C. greater than that of the first battery cell, the difference in discharge power at −20° C. between the second battery cells and the first battery cells being ≥10 W; the percentage by number of the first battery cells in the battery cells comprised in 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%.

公开(公告)号：US20230126948A1

公开(公告)日：2023-04-27

申请号：US17968887

申请日：2022-10-19

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Baoyun XU ,  Shaocong OUYANG ,  Chenghua FU

IPC: H01M4/36 ,  H01M50/204 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/485 ,  H01M10/42

Abstract: A battery pack may include a battery pack case and battery cells accommodated in the battery pack case; the inner space of the battery pack case may include a first area, a second area, a third area, and a fourth area; a first battery cell may be provided in the first area, a second battery cell may be provided in the second area, a third battery cell may be provided in the third area, and a fourth battery cell may be provided in the fourth area; and the first battery cell, the second battery cell, the third battery cell, and the fourth battery cell each have a first discharge voltage plateau and a second discharge voltage plateau, and an average discharge voltage in the first discharge voltage plateau may be higher than an average discharge voltage in the second discharge voltage plateau.

公开(公告)号：US20220255123A1

公开(公告)日：2022-08-11

申请号：US17730247

申请日：2022-04-27

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Changlong HAN ,  Zeli WU ,  Chenghua FU

IPC: H01M10/0525 ,  H01M4/04 ,  H01M4/36 ,  H01M10/0567 ,  H01M4/525 ,  H01M4/583

Abstract: The present application provides a secondary battery and an apparatus containing the same. The secondary battery includes: a negative electrode plate including a negative electrode current collector and a negative electrode film disposed on at least one surface of the negative electrode current collector, the negative electrode film including a negative active material; and an electrolyte including an electrolyte salt, an organic solvent, and an additive; wherein the negative active material includes a silicon-based material; the additive includes an additive A and an additive B; the additive A is selected from one or more of the compounds shown in Formula 1; the additive B is selected from one or more in the compound shown in Formula 2; the additive B has melting point of below or equal to 5° C.

公开(公告)号：US20220059867A1

公开(公告)日：2022-02-24

申请号：US17516504

申请日：2021-11-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Liye LI ,  Zeli WU ,  Changlong HAN ,  Chenghua FU

IPC: H01M10/0525 ,  H01M4/38 ,  H01M4/583 ,  H01M4/04 ,  H01M10/0568 ,  H01M10/0569 ,  H01M4/131 ,  H01M4/525 ,  H01M4/505

Abstract: The application provides a secondary battery and a device including the same. The second battery includes: a negative electrode plate, the negative electrode plate including a negative active material; a separation film, the separation film including a base material and a coating arranged on at least one surface of the base material; and an electrolyte, the electrolyte including an organic solvent, where the negative active material includes a silicon-based material and a carbon material; thickness of the base material of the separation film is 7 μm˜12 μm; and the organic solvent includes ethylene carbonate, and a weight ratio of the ethylene carbonate in the organic solvent is ≤20%. The secondary battery and the device including the same, which are provided by the application, in the premise of having high energy density, can also have good high-temperature cycle performance, good high-temperature storage performance, and low low-temperature direct current resistance.

公开(公告)号：US20210111434A1

公开(公告)日：2021-04-15

申请号：US17130713

申请日：2020-12-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chenghua FU ,  Peipei CHEN ,  Junmin FENG ,  Chengdu LIANG

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0567

Abstract: This application provides a nonaqueous electrolytic solution, a lithium-ion battery, a battery module, a battery pack, and an apparatus. The nonaqueous electrolytic solution includes a nonaqueous solvent and a lithium salt. The nonaqueous solvent includes a carbonate solvent and a high-oxidation-potential solvent. The carbonate solvent is a chain carbonate, and the high-oxidation-potential solvent is selected from one or more of compounds denoted by Formula I and Formula II. This application improves electrochemical performance of the lithium-ion battery under a high temperature and a high voltage as well as safety performance such as overcharge safety and hot-oven safety of the lithium-ion battery, and also ensures kinetic performance of the lithium-ion battery to some extent.

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：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：US20240014434A1

公开(公告)日：2024-01-11

申请号：US18372230

申请日：2023-09-25

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Suogang GUO ,  Chenghua FU ,  Yonghuang YE ,  Chenchen ZHANG

IPC: H01M10/04 ,  H01M50/46 ,  H01M10/0587

CPC classification number: H01M10/0431 ,  H01M50/46 ,  H01M10/0587

Abstract: The present application discloses an electrode assembly and a related battery cell, battery, apparatus and manufacturing method therefor. The electrode assembly may include: a first electrode sheet and a second electrode sheet having opposite polarities; and a separator configured to separate the first electrode sheet and the second electrode sheet, the separator including at least two layers, where the first electrode sheet, the second electrode sheet and the separator may be wound to form the electrode assembly.