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：US20250054989A1

公开(公告)日：2025-02-13

申请号：US18926423

申请日：2024-10-25

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Haizu JIN ,  Zhenhua LI ,  Xing LI

IPC: H01M4/62 ,  H01G11/06 ,  H01G11/28 ,  H01G11/50 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M4/66 ,  H01M6/50 ,  H01M10/0525

Abstract: The present application relates to a positive electrode plate and an electrochemical device. The positive electrode plate comprises a metal current collector, a positive active material layer and a safety coating disposed between the metal current collector and the positive active material layer, the safety coating comprising a polymer matrix, a conductive material and an inorganic filler wherein the polymer matrix is a fluorinated polyolefin and/or chlorinated polyolefin polymer matrix, wherein based on the total weight of the safety coating, the polymer matrix is present in a weight percentage of 35-75% by weight, the conductive material is present in a weight percentage of 5-25% by weight and the inorganic filler is present in a weight percentage of 10-60% by weight, and wherein the metal current collector has an elongation at break δ fulfilling 0.8%≤δ≤4%.

公开(公告)号：US20240313203A1

公开(公告)日：2024-09-19

申请号：US18676871

申请日：2024-05-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M50/249

CPC classification number: H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M50/249 ,  H01M2004/021 ,  H01M2004/028

Abstract: A positive electrode plate includes a current collector and an electrode membrane formed on at least one surface of the current collector. The electrode membrane includes a first positive electrode active substance layer and a second positive electrode active substance layer, and the first positive electrode active substance layer is located between the current collector and the second positive electrode active substance layer. A first positive electrode active substance material in the first positive electrode active substance layer contains hollow particles, and a second positive electrode active substance material in the second positive electrode active substance layer contains solid particles.

公开(公告)号：US20240304940A1

公开(公告)日：2024-09-12

申请号：US18654014

申请日：2024-05-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xing LI ,  Haizu JIN ,  Zhenhua LI

IPC: H01M50/383 ,  H01M50/209

CPC classification number: H01M50/383 ,  H01M50/209 ,  H01M2220/20

Abstract: The present application relates to a battery and a power consuming device. The battery includes: a case with an accommodating cavity therein; several battery cells arranged in the accommodating cavity; a collection assembly, which is fitted in the accommodating cavity and is configured to collect a conductive medium ejected when each of the battery cells undergoes thermal runaway.

公开(公告)号：US20240283059A1

公开(公告)日：2024-08-22

申请号：US18650145

申请日：2024-04-30

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Hu XU ,  Xing LI ,  Haizu JIN ,  Shaojun NIU ,  Fenggang ZHAO

IPC: H01M50/103 ,  H01M50/538 ,  H01M50/54 ,  H01M50/548 ,  H01M50/586 ,  H01M50/593

CPC classification number: H01M50/103 ,  H01M50/538 ,  H01M50/54 ,  H01M50/548 ,  H01M50/586 ,  H01M50/593

Abstract: A battery cell includes: a housing; an electrode unit accommodated in the housing and including a first electrode assembly and a second electrode assembly which are disposed along a first direction, wherein the first electrode assembly and the second electrode assembly are arranged in parallel, the first electrode assembly includes a first body and a first tab, and the second electrode assembly includes a second body and a second tab, and wherein a polarity of the first tab is the same as a polarity of the second tab, and at least a part of the first tab and at least a part of the second tab are located between the first body and the second body; and a first electrode terminal disposed on the housing and electrically connected to the first tab and the second tab to export electric energies of the first electrode assembly and the second electrode assembly.

公开(公告)号：US20240274962A1

公开(公告)日：2024-08-15

申请号：US18637389

申请日：2024-04-16

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Hu XU ,  Shaojun NIU ,  Haizu JIN ,  Xing LI ,  Fenggang ZHAO

IPC: H01M50/291 ,  H01M10/04 ,  H01M10/6554 ,  H01M50/213

CPC classification number: H01M50/291 ,  H01M10/0431 ,  H01M10/6554 ,  H01M50/213

Abstract: A battery cell includes a shell and three electrode assemblies wound into cylinders. The three electrode assemblies are arranged in a row in the shell in such a manner that axes of the three electrode assemblies are parallel to one another, the shell has a thickness middle surface connected to the axes of the three electrode assemblies, the thickness middle surface is in a V shape, the shell has a first side surface and a second side surface both in an arcuate wavy shape, the first side surface and the second side surface are opposite each other relative to the thickness middle surface of the shell, and the three electrode assemblies are arranged between the first side surface and the second side surface.