公开(公告)号：US20220359879A1

公开(公告)日：2022-11-10

申请号：US17866509

申请日：2022-07-17

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jianghui LIN ,  Yanjie ZHAO ,  Xing LI ,  Haizu JIN

IPC: H01M4/62 ,  C08F10/14 ,  C08G61/10

Abstract: A binder includes a copolymer including a building block (I) and a building block (II) The building block (I) is formed by copolymerizing a building block (i) and a building block (ii)

公开(公告)号：US20220246973A1

公开(公告)日：2022-08-04

申请号：US17562537

申请日：2021-12-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Haizu JIN ,  Hu XU ,  Baiqing LI ,  Xing LI ,  Chengdu LIANG

IPC: H01M10/04

Abstract: The present application provides an electrode assembly, including a negative electrode plate and a positive electrode plate, the negative electrode plate and the positive electrode plate being wound in a winding direction to form a winding structure including a bending area. Both the negative and the positive electrode plates include a plurality of bending portions located in the bending area. At least one bending portion in the negative electrode plate is a first bending portion, and an active substance capacity per unit area outside the first bending portion is greater than an active substance capacity per unit area inside the first bending portion; and/or, at least one bending portion in the positive electrode plate is a second bending portion, and an active substance capacity per unit area outside the second bending portion is greater than an active substance capacity per unit area inside the second bending portion.

公开(公告)号：US20210249744A1

公开(公告)日：2021-08-12

申请号：US17057527

申请日：2019-11-15

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yaohui Wang ,  Xing LI ,  Zhenhua LI

IPC: H01M50/581 ,  H01M10/42 ,  H01M4/62 ,  H01M6/50 ,  H01M4/06 ,  H01M4/13 ,  H01M4/36 ,  H01G11/28 ,  H01G11/32

Abstract: The present application relates to a positive electrode plate and an electrochemical device. The positive electrode plate includes a current collector, a positive active material layer and a safety coating disposed between the current collector and the positive active material layer, the safety coating including a polymer matrix and a conductive material, wherein the polymer matrix is fluorinated polyolefin and/or chlorinated polyolefin, and when the safety coating and the positive active material layer are collectively referred to as a positive film layer, the positive film layer includes Na ions and/or K ions at a content of 100 ppm or more, and has an absorption peak at 1646 cm−1 in infrared absorption spectrum. The positive electrode plate may improve safety performance at elevated temperature of the electrochemical device by quickly disconnecting the circuit at high temperature conditions or when an internal short circuit occurs.

公开(公告)号：US20210184220A1

公开(公告)日：2021-06-17

申请号：US16762507

申请日：2018-11-07

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xiaowen ZHANG ,  Haizu JIN ,  Xing LI

IPC: H01M4/66 ,  H01M10/42 ,  H01M4/62 ,  H01M4/13 ,  H01M10/0525 ,  C09D127/16 ,  C09D127/08

Abstract: The present application relates to a positive electrode plate, an electrochemical device and a safety coating. The positive electrode plate comprises a current collector, a positive active material layer and a safety coating disposed between the current collector and the positive active material layer, the safety coating comprising a fluorinated polyolefin and/or chlorinated polyolefin polymer matrix, a conductive material and an inorganic filler. The positive electrode plate can quickly disconnect circuit when the electrochemical device (such as a capacitor, primary battery, or secondary battery, and the like) is in a high temperature condition or an internal short circuit occurs, thereby improving high temperature safety performance of the electrochemical device.

公开(公告)号：US20170365880A1

公开(公告)日：2017-12-21

申请号：US15627845

申请日：2017-06-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Wujun ZOU ,  Xiaowen ZHANG ,  Haizu JIN ,  Jian DUAN ,  Weitao WANG ,  Xing LI

IPC: H01M10/0567 ,  H01M2/04 ,  H01M10/0525 ,  H01M10/44

CPC classification number: H01M10/0567 ,  H01M2/0486 ,  H01M2/16 ,  H01M4/13 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/4235 ,  H01M10/443 ,  H01M10/445 ,  H01M2200/10 ,  H01M2200/20

Abstract: The secondary battery of the present application includes a cell, an electrolyte and a case, the cell includes electrodes and a separator. The secondary battery further includes a gas-generating additive and a water-generating additive. During the overcharging process of the Li-ion battery, when the battery reaches a certain temperature, the water-generating additive decomposes and generates a large amount of water. Then, Li salt and the gas-generating additive are induced to decompose and generate a large amount of gas, so that when the internal pressure of the battery reaches a certain value, the charging current is interrupted in advance by a device for interrupting charging current. Moreover, the water-generating additive can absorb the heat generated by the battery during decomposition, so that the internal temperature of the battery decreases, thereby preventing the overcharge failure of the battery.

公开(公告)号：US20240363980A1

公开(公告)日：2024-10-31

申请号：US18764987

申请日：2024-07-05

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Hu XU ,  Xing LI ,  Jiao DONG ,  Shaojun NIU

IPC: H01M50/536 ,  H01M10/04 ,  H01M50/103 ,  H01M50/538

CPC classification number: H01M50/536 ,  H01M10/0431 ,  H01M50/103 ,  H01M50/538

Abstract: A battery cell includes: a housing; at least one wound cell arranged in the housing, where each wound cell has a tab, and the tab at at least one end forms a flattened plane covering an end surface of the wound cell; a pole; and an adapting member connecting the pole to the tab of the at least one wound cell. In the battery cell, the tab at at least one end on the wound cell forms the flattened plane covering the end surface of the wound cell, which can reduce the battery space occupied by the tab, and increase the winding space, thereby improving the energy density of the battery cell. The flattened plane can be stably connected to the adapting member, overcoming the need to align a plurality of tabs for a stable connection to the adapting plate. This improves production line efficiency and reduces battery production costs.

公开(公告)号：US20240222812A1

公开(公告)日：2024-07-04

申请号：US18610284

申请日：2024-03-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Hu XU ,  Siying HUANG ,  Jiao DONG ,  Xing LI ,  Shaojun NIU

IPC: H01M50/533 ,  H01M10/0587

CPC classification number: H01M50/533 ,  H01M10/0587 ,  H01M2220/20

Abstract: An electrode assembly is formed by winding an electrode plate and a separator, and the electrode plate includes a coating region and a plurality of tabs. When the electrode assembly is unfolded, the tabs each include a first part and a second part, and the second part is located on a side of the tab that is away from the coating region. Along a length direction of the electrode plate, two sides of the first part respectively have a first side cut and a second side cut that are opposite to each other, and two sides of the second part respectively have a third side cut and a fourth side cut that are opposite to each other. The first side cut and the third side cut are disposed located on a same side and connected to each other.

公开(公告)号：US20240178493A1

公开(公告)日：2024-05-30

申请号：US18428650

申请日：2024-01-31

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Hu XU ,  Siying HUANG ,  Fenggang ZHAO ,  Xueqi ZHONG ,  Xing LI ,  Shaojun NIU ,  Wenqi ZHU

IPC: H01M50/188 ,  H01M50/107 ,  H01M50/179 ,  H01M50/184 ,  H01M50/213 ,  H01M50/249 ,  H01M50/528 ,  H01M50/531

CPC classification number: H01M50/188 ,  H01M50/107 ,  H01M50/179 ,  H01M50/184 ,  H01M50/213 ,  H01M50/249 ,  H01M50/528 ,  H01M50/531 ,  H01M2220/20

Abstract: A battery cell includes a housing, an end cap, an electrode terminal, an electrode assembly, and an insulating member. The housing has an opening. The end cap is provided for covering the opening. The electrode terminal is in insulated connection with the end cap. The electrode assembly is housed within the housing and includes a main body and first and second tabs. The first and second tab have different polarities and are disposed on a same end of the main body facing the end cap. One of the first and second tabs is provided for electrically connecting the end cap, and the other one is provided for electrically connecting the electrode terminal. The insulating member is at least partially located between the first tab and the second tab, and abuts against the main body along a thickness direction of the end cap.

公开(公告)号：US20230207947A1

公开(公告)日：2023-06-29

申请号：US17967845

申请日：2022-10-17

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yu TANG ,  Peng WANG ,  Xiayi WU ,  Zhenhua LI ,  Xing LI

IPC: H01M50/264 ,  H01M50/209 ,  H01M50/271 ,  H01M50/147 ,  H01M10/04

CPC classification number: H01M50/264 ,  H01M50/209 ,  H01M50/271 ,  H01M50/147 ,  H01M10/0431 ,  H01M2220/20

Abstract: Provided are battery, electric device, method for manufacturing battery, and device for manufacturing battery. The battery includes: multiple battery cells, wherein a wall with the largest area among outer walls of each battery cell is provided parallel to horizontal plane; and a binding component, accommodating and binding the multiple battery cells, wherein a reinforcing portion is provided at part of the binding component parallel to the wall with the largest area, and the reinforcing portion reinforces the strength of the binding component, to enhance binding force of the binding component to the multiple battery cells. The binding force to the walls with the largest area among outer walls of the battery cells is enhanced, too much expansion and deformation of the battery cells is avoided, and the failure probability of the battery caused by extrusion to other structural parts of the battery after the battery cells expand is reduced.

公开(公告)号：US20200161623A1

公开(公告)日：2020-05-21

申请号：US16422869

申请日：2019-05-24

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yaohui WANG ,  Zhenhua LI ,  Xing LI

IPC: H01M2/34 ,  H01M4/66 ,  H01G11/68 ,  H01G11/18

Abstract: The present invention relates to a positive electrode plate and an electrochemical device. The positive electrode plate comprises a current collector, a positive active material layer and a safety coating disposed between the current collector and the positive active material layer, wherein the safety coating comprises a polymer matrix, a conductive material and an inorganic filler, wherein the polymer matrix comprises at least two types of polymer materials, and the first type of polymer material is fluorinated polyolefin and/or chlorinated polyolefin, and the solubility of the second type of polymer material in oil solvent is smaller than the solubility of the first type of polymer material; and the weight percentage of the first type of polymer material relative to the total weight of the polymer matrix, the conductive material and the inorganic filler is 17.5% or more. The positive electrode plate improves high temperature safety of electrochemical device.