公开(公告)号：US20230223666A1

公开(公告)日：2023-07-13

申请号：US18118753

申请日：2023-03-08

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yuqun ZENG ,  Yongshou LIN ,  Zhenhua LI ,  Haizu JIN ,  Xiaowen ZHANG

IPC: H01M50/581 ,  H01M4/62 ,  H01G11/68 ,  H01M4/66 ,  H01G11/14 ,  H01M10/0525 ,  H01G11/70 ,  H01M4/02

CPC classification number: H01M50/581 ,  H01M4/628 ,  H01G11/68 ,  H01M4/667 ,  H01G11/14 ,  H01M10/0525 ,  H01G11/70 ,  H01M2004/028 ,  H01M2200/106

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, and wherein the safety coating comprises a polymer matrix, a conductive material and an inorganic filler and wherein when the safety coating and the positive active material layer are collectively referred as a film layer, the film layer has an elongation of 30% or more and wherein the polymer matrix of the safety coating is fluorinated polyolefin and/or chlorinated polyolefin having a crosslinked structure. The positive electrode plate may improve the safety performance during nail penetration of the electrochemical device such as capacitor, primary battery or secondary battery and the like.

公开(公告)号：US20230187791A1

公开(公告)日：2023-06-15

申请号：US18106511

申请日：2023-02-07

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Haihe XIAO ,  Xiaowen ZHANG ,  Qiang LIU ,  Xigen ZHOU ,  Mingxiang LIN ,  Wei ZHONG

IPC: H01M50/533 ,  H01M50/103 ,  H01M50/548 ,  H01M50/567 ,  H01M50/564 ,  H01M50/553 ,  H01M50/588 ,  H01M50/593 ,  H01M50/176 ,  H01M50/184 ,  H01M50/188

CPC classification number: H01M50/533 ,  H01M50/103 ,  H01M50/548 ,  H01M50/567 ,  H01M50/564 ,  H01M50/553 ,  H01M50/588 ,  H01M50/593 ,  H01M50/176 ,  H01M50/184 ,  H01M50/188 ,  H01M2220/20

Abstract: An adapter may include a first adapter and a second adapter disposed discretely. The first adapter may be configured to be connected to one of an electrode post or a tab. The second adapter may be configured to be connected to the other of the electrode post or the tab. The first adapter may substantially extend along a first direction. The second adapter may substantially extend along a second direction. The first direction may intersect the second direction. The first adapter may be connected to the second adapter by a conductive structure.

公开(公告)号：US20210367280A1

公开(公告)日：2021-11-25

申请号：US17056479

申请日：2019-11-15

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Haizu JIN ,  Xiaowen ZHANG ,  Zhenhua LI

IPC: H01M10/42 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/66 ,  H01G11/28

Abstract: The present application 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, the safety coating comprising a polymer matrix, a conductive material and an inorganic filler, wherein the polymer matrix is fluorinated polyolefin and/or chlorinated polyolefin and the weight ratio of the polymer matrix to the conductive material is 2 or more. The positive electrode plate may improve the safety performance during nail penetration of the electrochemical device such as a capacitor, a primary battery or a secondary battery.

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：US20200161638A1

公开(公告)日：2020-05-21

申请号：US16422860

申请日：2019-05-24

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Fenggang ZHAO ,  Yongshou LIN ,  Zhenhua LI ,  Haizu JIN ,  Xiaowen ZHANG

IPC: H01M4/36 ,  H01M4/62

Abstract: This application relates to a battery comprising a positive electrode plate, a separator, and a negative electrode plate, wherein the positive electrode plate comprises a positive electrode current collector and at least two layers of positive active material coated on at least one surface of the positive electrode current collector, and wherein the underlying positive active material layer in contact with the positive electrode current collector comprises a first positive active material, a first polymer material and a first conductive material, and the first polymer material comprises fluorinated polyolefin and/or chlorinated polyolefin polymer material. The battery has good safety and improved electrical properties.

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.