公开(公告)号：US20200161659A1

公开(公告)日：2020-05-21

申请号：US16426867

申请日：2019-05-30

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wei Li ,  Haihao Shi ,  Huihui Liu ,  Chao Jin ,  Jianbao Xu ,  Shisong Li ,  Chao Guo

IPC: H01M4/62 ,  H01G11/38 ,  H01G11/48

Abstract: The present invention 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 binding layer disposed between the current collector and the positive active material layer, the binding layer comprising a polymer material, a conductive material, and an inorganic filler, wherein the polymer material comprises a binding layer matrix and the binding layer matrix is an oil-dispersible polymer material having a solubility in NMP at 130 ° C. for 5 minutes, which is 30% or less of the solubility of PVDF under the same conditions. The positive electrode plate can improve the safety performance of the electrochemical device (for example, a capacitor, a primary battery, a secondary battery, or the like) under abnormal conditions such as nailing penetration.

公开(公告)号：US20170214036A1

公开(公告)日：2017-07-27

申请号：US15409384

申请日：2017-01-18

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jiandong Yang ,  Wei Li ,  Haizu Jin ,  Yu Luo ,  Yongshou Lin ,  Kai Wu

IPC: H01M4/13 ,  H01M4/66 ,  H01M2/18 ,  H01M10/0525

CPC classification number: H01M4/13 ,  H01M2/18 ,  H01M4/661 ,  H01M4/70 ,  H01M10/0525 ,  Y02T10/7011

Abstract: The present application relates to an electrode sheet for Li-ion battery and a Li-ion battery including the same. The Li-ion battery includes a current collector and a diaphragm layer coated on the current collector, the current collector includes a coating region and at least one electrode tab region, the coating region is a region of the current collector coated with the diaphragm layer; the coating region is adjoined with the electrode tab region, a stress releasing region is provided at adjoining position of the coating region and at least one electrode tab region. The stress releasing region provided by the present application can reduce stress received by the diaphragm during rolling and stretching processes, which can avoid cracking of electrode tab and electrode sheet, and can improve battery cycling performance and, at the same time, can also be fused in short circuit, thereby improving safety performance of the battery.

公开(公告)号：US20240339626A1

公开(公告)日：2024-10-10

申请号：US18743121

申请日：2024-06-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Kai Wu ,  Qingrui Xue ,  Wei Li ,  Zige Zhang ,  Yu Zhang ,  Zhengyuan Zhao

IPC: H01M4/70 ,  H01M4/02 ,  H01M4/13 ,  H01M4/66 ,  H01M50/46

CPC classification number: H01M4/70 ,  H01M4/13 ,  H01M4/661 ,  H01M4/667 ,  H01M50/46 ,  H01M2004/021

Abstract: Provided are an electrode assembly, a battery cell, a battery, and an electric device. The electrode assembly includes a negative electrode plate, a positive electrode plate, and a separator stacked along a first direction, the separator being used to separate the positive electrode plate and the negative electrode plate; where in a second direction, size of the negative electrode plate is larger than size of the positive electrode plate, and an orthographic projection of the positive electrode plate on a plane in which a surface of the negative electrode plate is located does not extend beyond the negative electrode plate, where the second direction is a width direction of the negative electrode plate, and the first direction is perpendicular to the second direction.

公开(公告)号：US20240339625A1

公开(公告)日：2024-10-10

申请号：US18743114

申请日：2024-06-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qingrui Xue ,  Zige Zhang ,  Wei Li ,  Yu Zhang ,  Zhengyuan Zhao ,  Jinsong Zhang

IPC: H01M4/66 ,  H01M50/536

CPC classification number: H01M4/667 ,  H01M50/536

Abstract: Provided are a battery electrode plate, an electrode assembly, a battery cell, a battery, and an electric device, which can improve battery safety. Specifically, the battery electrode plate according to an embodiment of this application includes a current collector, an active substance layer, and a conductive structure, where the current collector includes a main body portion and a tab portion disposed in a first direction, where the main body portion is covered with the active substance layer and the tab portion is not covered with the active substance layer; a first region of the conductive structure is welded to a portion of the tab portion to form a welding mark zone; and the welding mark zone is at least partially covered with a protective layer.

公开(公告)号：US12051811B2

公开(公告)日：2024-07-30

申请号：US17112749

申请日：2020-12-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jing Li ,  Qingrui Xue ,  Zige Zhang ,  Wei Li ,  Xianwei Yang

IPC: H01M4/66

CPC classification number: H01M4/662 ,  H01M4/663 ,  H01M4/664 ,  H01M4/667

Abstract: This application relates to an electrode plate that includes a current collector and an electrode active material layer disposed on at least one surface of the current collector. The current collector includes a support layer and a conductive layer disposed on at least one surface of the support layer. A single-side thickness D2 of the conductive layer satisfies 30 nm≤D2≤3 μm, a conductive primer layer including a conductive material and a bonding agent is further disposed between the current collector and the electrode active material layer. The bonding agent in the conductive primer layer includes a water-based bonding agent. The electrode plate in this application has good machinability. An electrochemical apparatus including the electrode plate has high energy density, good electrical performance, and long-term reliability.

公开(公告)号：US11923547B2

公开(公告)日：2024-03-05

申请号：US17501905

申请日：2021-10-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jing Li ,  Wei Li ,  Qingrui Xue ,  Zige Zhang ,  Yang Zhang ,  Pengxiang Wang ,  Yang Lu

IPC: H01M4/66 ,  H01M4/13 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/667 ,  H01M4/13 ,  H01M4/622 ,  H01M4/625 ,  H01M4/626 ,  H01M4/661 ,  H01M4/662 ,  H01M4/668 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: This application relates to the battery field, and specifically, to a positive electrode plate, an electrochemical apparatus, and an apparatus. The positive electrode plate in this application includes a current collector and an electrode active material layer disposed on at least one surface of the current collector, where the current collector includes a support layer and a conductive layer disposed on at least one surface of the support layer. A single-sided thickness D2 of the conductive layer satisfies 30 nm≤D2≤3 μm. A thickness D1 of the support layer satisfies 1 μm≤D1≤30 μm. The support layer is made of a polymer material or a polymer composite material. The electrode active material layer includes electrode active materials, a binder, and a conductive agent.

公开(公告)号：US11631862B2

公开(公告)日：2023-04-18

申请号：US17543954

申请日：2021-12-07

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yaru Zhou ,  Qingrui Xue ,  Zige Zhang ,  Miao Jiang ,  Jing Li ,  Wei Li ,  Long Wang

IPC: H01M4/66 ,  H01M4/70 ,  H01M50/536 ,  H01M4/02

Abstract: The present disclosure relates to a secondary battery and an electrode plate. The electrode plate includes a current collector, an active material layer, a conductive structure, and a first protective layer. The current collector includes an insulating layer and a conductive layer disposed on the insulating layer. The conductive layer includes a main body portion and a protrusion portion. A surface of the main body portion facing away from the insulating layer is covered by the active material layer, while a surface of the protrusion portion facing away from the insulating layer is uncovered by the active material layer. The conductive structure is welded to the protrusion portion and thus a welded zone is formed. The first protective layer has elasticity, and is disposed on a side of the protrusion portion facing away from the insulating layer and is located between the welded zone and the active material layer.

公开(公告)号：US11444284B2

公开(公告)日：2022-09-13

申请号：US16817278

申请日：2020-03-12

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zige Zhang ,  Wei Li ,  Qingrui Xue ,  Jing Li ,  Pengxiang Wang ,  Yang Zhang

IPC: H01M4/66 ,  H01M4/46 ,  H01M4/78

Abstract: The present application relates to a secondary battery and an electrode member thereof. The electrode member includes an insulating substrate, a conducting layer and an active material layer. The conducting layer is provided on a surface of the insulating substrate, and the conducting layer includes a main portion and a protruding portion extending from the main portion, the main portion is coated with the active material layer, the protruding portion is not coated with the active material layer. The active material layer includes a first portion and a second portion, the first portion is positioned at an end of the active material layer away from the protruding portion, the second portion is positioned at a side of the first portion close to the protruding portion, and a thickness of the first portion is less than a thickness of the second portion.

公开(公告)号：US11362395B2

公开(公告)日：2022-06-14

申请号：US17565490

申请日：2021-12-30

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Huaichao Tang ,  Wei Li ,  Kai Wu ,  Chengdu Liang

IPC: H01M50/583 ,  H01M50/271 ,  H01M50/505 ,  H01M50/55

Abstract: The disclosure relates to an end cover assembly, a secondary battery, a battery pack and an electric device. An end cover assembly for a secondary battery includes: an end cover; a first terminal including a first connecting section and a second connecting section disposed along a radial direction; a second terminal including a third connecting section, a fuse section and a fourth connecting section sequentially connected along the radial direction; along an axial direction, orthographic projections of the first and third connecting sections at least partially overlap with each other, one of the first and third connecting sections is configured to connect with a busbar, the other is configured to connect with an electrode assembly, the fourth connecting section is configured to connect with the second connecting section; and an insulating component, at least a part of which is located between the first connecting section and the third connecting section.

公开(公告)号：US20220093933A1

公开(公告)日：2022-03-24

申请号：US17541300

申请日：2021-12-03

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wei Li ,  Jing Li ,  Qingrui Xue ,  Yang Zhang ,  Zige Zhang ,  Pengxiang Wang ,  Yang Lu

IPC: H01M4/66 ,  H01M4/62 ,  H01M50/586 ,  H01M50/536 ,  H01M50/59 ,  H01M10/0525

Abstract: This application relates to an electrode plate, an electrochemical apparatus, and an apparatus thereof. The electrode plate in this application includes a current collector, an electrode active material layer disposed on at least one surface of the current collector, and an electrical connection member electrically connected to the current collector. The electrode active material layer is disposed on a main body portion of the current collector at a zone referred to as a film zone, the electrical connection member and the current collector are welded and connected at an edge of the current collector at a welding zone referred to as a transfer welding zone, and a transition zone of the current collector between the film zone and the transfer welding zone, coated with no electrode active material layer, is referred to as an extension zone. The current collector is a composite current collector.