公开(公告)号：US20240250247A1

公开(公告)日：2024-07-25

申请号：US18531739

申请日：2023-12-07

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/587 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2220/20

Abstract: The present application discloses a negative electrode plate including a negative electrode active material layer including a first active material layer; wherein in a first cross section in a thickness direction of the negative electrode plate, the first active material has a particle size a in a direction parallel to the metal conductive layer, the first active material has a particle size b in the thickness direction, satisfying 0.8≤a/b≤20; in a second cross section in the thickness direction, the first active material has a particle size c in the direction parallel to the metal conductive layer, the first active material has a particle size d in the thickness direction, satisfying 0.8≤c/d≤20; and the first cross section is parallel to a first direction, the second cross section is parallel to a second direction, and the first direction intersects the second direction.

公开(公告)号：US11923537B2

公开(公告)日：2024-03-05

申请号：US17547265

申请日：2021-12-10

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/36 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/366 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2220/20

Abstract: The present application discloses a negative electrode plate including a negative electrode active material layer including a first active material layer; wherein in a first cross section in a thickness direction of the negative electrode plate, the first active material has a size a in a direction parallel to the metal conductive layer, the first active material has a size b in the thickness direction, satisfying 0.8≤a/b≤20; in a second cross section in the thickness direction of the negative electrode plate, the first active material has a size c in the direction parallel to the metal conductive layer, the first active material has a size d in the thickness direction, satisfying 0.8≤c/d≤20; and the first cross section is parallel to a first direction, the second cross section is parallel to a second direction, and the first direction intersects the second direction.

公开(公告)号：US11271273B2

公开(公告)日：2022-03-08

申请号：US17137090

申请日：2020-12-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M50/531 ,  H01M10/058 ,  H01M50/172 ,  H01M50/543

Abstract: The present application relates to an electrode member, an electrode assembly and a secondary battery. The electrode member comprises an electrode body and a conductive structure that has a first portion having an active material and a second portion extending from the first portion. The second portion comprises a main portion and a transition portion provided between the main portion and the first portion, and a width of the transition portion larger than a width of the main portion. The conductive structure is welded with the second portion and extends along a direction away from the first portion. At least a part of a welding region formed by the second portion and the conductive structure is positioned at the transition portion, thereby avoiding the overcurrent area being significantly reduced by the main portion and ensuring that every position electric current passes through have a sufficient overcurrent area.

公开(公告)号：US11133508B2

公开(公告)日：2021-09-28

申请号：US16374155

申请日：2019-04-03

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/64 ,  H01M4/04 ,  H01M10/04

Abstract: The present disclosure provides a secondary battery and an electrode plate. The electrode plate includes a current collector, an active material layer, and a first protective layer. The current collector includes an insulating layer and a conductive layer disposed on the insulating layer. The conductive layer has a main body portion covered by the active material layer and a protrusion portion uncovered by the active material layer. The first protective layer is disposed on a side of the protrusion portion facing away from the insulating layer. The electrode plate further includes a conductive structure, which has a connecting portion fixed on the main body portion, and a first extending portion exceeding an end of the protrusion portion away from the main body portion. The first protective layer is disposed on a side of the connecting portion close to the active material layer along a height direction.

公开(公告)号：US20200235368A1

公开(公告)日：2020-07-23

申请号：US16732180

申请日：2019-12-31

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M2/26 ,  H01M2/06 ,  H01M2/30 ,  H01M10/058

Abstract: The present disclosure relates to the field of energy storage device, and particularly relates to an electrode member, an electrode assembly and a secondary battery. The electrode member comprises an electrode body and a conductive structure. The conducting layer comprises a first portion having an active material and a second portion extending from the first portion; the second portion comprises a main portion and a transition portion, the transition portion is provided between the main portion and the first portion, and a width of the transition portion is larger than a width of the main portion. The conductive structure is welded with the second portion and extends along a direction away from the first portion, and at least a part of a welding region formed by the second portion and the conductive structure is positioned at the transition portion. The present disclosure can avoid the overcurrent area being significantly reduced caused by the main portion, ensure that every position the electric current passing through has a sufficient overcurrent area, and improve the safety performance of the secondary battery.

公开(公告)号：US11804604B2

公开(公告)日：2023-10-31

申请号：US17139124

申请日：2020-12-31

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/66 ,  H01M4/133 ,  H01M4/134 ,  H01M4/60 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/667 ,  H01M4/133 ,  H01M4/134 ,  H01M4/602 ,  H01M4/623 ,  H01M4/661 ,  H01M10/0525 ,  H01M2004/028

Abstract: The present application relates to the field of battery, in particular to a positive electrode piece, an electrochemical device and an apparatus. The positive electrode piece of the present application includes a current collector and an electrode active material layer arranged on at least one surface of the current collector, where the current collector includes a support layer and a conductive layer arranged on at least one surface of the support layer. The thickness D2 of one side of the conductive layer D2 satisfies 30 nm≤D2≤3 μm, the material of the conductive layer is aluminum or aluminum alloy, and the density of the conductive layer is 2.5 g/cm3 to 2.8 g/cm3, and a primer layer containing a conductive material and a binder is also arranged between the current collector and the electrode active material layer.

公开(公告)号：US11664486B2

公开(公告)日：2023-05-30

申请号：US16452534

申请日：2019-06-26

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02 ,  H01M4/587 ,  H01M10/058 ,  H01M10/42 ,  H01M50/586

CPC classification number: H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M4/622 ,  H01M10/058 ,  H01M10/0525 ,  H01M10/4235 ,  H01M50/586 ,  H01M2004/028

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 an 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 wherein an upper positive active material layer in contact with the underlying positive active material layer and away from the positive electrode current collector comprises a second positive active material, a second polymer material and a second 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：US11575134B2

公开(公告)日：2023-02-07

申请号：US16969475

申请日：2019-11-15

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wei Li ,  Qingrui Xue ,  Jing Li ,  Zige Zhang ,  Jianbao Xu

IPC: H01M4/62 ,  H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/137 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/66 ,  H01M10/0525 ,  H01M4/02

Abstract: This application relates to a positive electrode plate and an electrochemical device. The positive electrode plate comprises a metal current collector, a positive electrode active material layer and a safety coating disposed between the metal current collector and the positive electrode active material layer; the safety coating comprises a polymer matrix, a conductive material and an inorganic filler; the positive electrode active material layer comprises Li1+xNiaCobMe(1−a−b)O2, wherein −0.1≤x≤0.2, 0.6≤a

公开(公告)号：US20210119303A1

公开(公告)日：2021-04-22

申请号：US17137090

申请日：2020-12-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qingrui XUE ,  Zige Zhang ,  Miao Jiang ,  Jing Li ,  Wei Li ,  Xianwei Yang

IPC: H01M50/531 ,  H01M10/058 ,  H01M50/172 ,  H01M50/543

Abstract: The present disclosure relates to an electrode member, an electrode assembly and a secondary battery. The electrode member comprises an electrode body and a conductive structure that has a first portion having an active material and a second portion extending from the first portion. The second portion comprises a main portion and a transition portion, the transition portion provided between the main portion and the first portion, and a width of the transition portion larger than a width of the main portion. The conductive structure is welded with the second portion and extends along a direction away from the first portion. At least a part of a welding region formed by the second portion and the conductive structure is positioned at the transition portion, thereby avoiding the overcurrent area being significantly reduced by the main portion and ensuring that every position electric current passes through have a sufficient overcurrent area.

公开(公告)号：US12294090B2

公开(公告)日：2025-05-06

申请号：US17540263

申请日：2021-12-02

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/66 ,  H01M4/02 ,  H01M4/62

Abstract: This application relates to an electrode plate, an electrochemical apparatus, and an apparatus thereof. The electrode plate of this application includes a current collector, an electrode active material layer provided 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 provided on a main body portion of the current collector in 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 an transfer welding zone and a transition zone is referred to as an extension zone, where the transition zone is of the current collector between the film zone and the transfer welding zone, and is coated with no electrode active material layer.