公开(公告)号：US20200212449A1

公开(公告)日：2020-07-02

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 disclosure provides 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：US10249870B2

公开(公告)日：2019-04-02

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: H01M4/02 ,  H01M4/13 ,  H01M2/18 ,  H01M4/66 ,  H01M10/0525 ,  H01M4/70

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：US20240332546A1

公开(公告)日：2024-10-03

申请号：US18739333

申请日：2024-06-11

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M4/70 ,  H01M4/66 ,  H01M10/04 ,  H01M50/538

CPC classification number: H01M4/70 ,  H01M4/667 ,  H01M10/0431 ,  H01M50/538

Abstract: Provided are an electrode plate, an electrode assembly, a battery cell, a battery, and an electric device, where the electrode plate includes an active substance region and a non-active substance region arranged along a first direction. The non-active substance region is provided with a bending structure bent along a second direction, the bending structure extends along a third direction, and in the third direction, the active substance region and the bending structure have the same size, where the second direction is a thickness direction of the active substance region, and the first direction, the second direction, and the third direction are perpendicular to each other. This not only increases the space utilization and energy density of the battery cell, but also simplifies the production process and improves the production efficiency of the battery cell.

公开(公告)号：US20240332541A1

公开(公告)日：2024-10-03

申请号：US18743130

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 ,  H01M4/02 ,  H01M10/04 ,  H01M50/213 ,  H01M50/536

CPC classification number: H01M4/667 ,  H01M10/0431 ,  H01M50/213 ,  H01M50/536 ,  H01M2004/021

Abstract: Provided are an electrode plate, including a current collector, an active substance layer, and a conductive structure. The current collector includes a body portion and a tab portion provided along a first direction, where the body portion is covered with the active substance layer, the tab portion is not covered with the active substance layer, and the conductive structure extends along the first direction and is connected to the tab portion, forming a connecting zone. In a second direction, the connecting zone has a dimension greater than thickness of a body region of the electrode plate, so that after an electrode assembly is wound, connecting zones of adjacent layers are mutually attached; where the second direction is a thickness direction of the electrode plate, the second direction is perpendicular to the first direction.

公开(公告)号：US20240313366A1

公开(公告)日：2024-09-19

申请号：US18672003

申请日：2024-05-23

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M50/536 ,  H01M50/528 ,  H01M50/538

CPC classification number: H01M50/536 ,  H01M50/528 ,  H01M50/538

Abstract: Embodiments of this application provide a battery cell, a battery, and an electric device. The battery cell includes an electrode assembly, and the electrode assembly includes a body portion and a lead-out portion that are disposed in a first direction, the body portion being electrically connected to an electrode terminal via the lead-out portion. The lead-out portion includes a tab portion and a conductive structure. A first end of the conductive structure is welded to the tab portion to form a welded zone, a second end of the conductive structure is connected to the electrode terminal, and the conductive structure extends along a direction leaving the body portion. A melting zone is provided between the welded zone and the body portion. The technical solution of this application can reduce the probability of thermal runaway of batteries.

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：US20230075325A1

公开(公告)日：2023-03-09

申请号：US18046157

申请日：2022-10-13

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qian Liu ,  Quanguo Li ,  Xia Hu ,  Yonghuang Ye ,  Wei Li

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/136 ,  H01M4/58 ,  H01M4/525 ,  H01M4/1391 ,  H01M4/1397 ,  H01M10/058 ,  H01M10/0525 ,  H01M4/04

Abstract: A secondary battery and a preparation method thereof, and a battery module, battery pack, and apparatus containing a secondary battery are provided. In some embodiments, the secondary battery includes a positive electrode plate, a negative electrode plate, and an electrolyte, where the positive electrode plate includes a positive electrode current collector and a positive electrode film layer that is disposed on at least one surface of the positive electrode current collector and that includes a positive electrode active material, and the negative electrode plate includes a negative electrode current collector and a negative electrode film layer that is disposed on at least one surface of the negative electrode current collector and that includes a negative electrode active material; and the positive electrode active material includes a first material and a second material.

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：US20230016240A1

公开(公告)日：2023-01-19

申请号：US17942022

申请日：2022-09-09

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qian LIU ,  Xia Hu ,  Quanguo Li ,  Yonghuang Ye ,  Wei Li

IPC: H01M4/58 ,  H01M4/505 ,  H01M4/525

Abstract: This application provides a secondary battery and a preparation method thereof, and a battery module, battery pack, and apparatus containing a secondary battery. The secondary battery includes a positive electrode plate, the positive electrode plate includes a positive electrode current collector and a positive electrode film layer that is disposed on the positive electrode current collector and that includes a positive electrode active material, where the positive electrode active material includes a first material and a second material, the first material contains lithium transition metal oxide, the second material contains lithium transition metal phosphate, the lithium transition metal phosphate includes secondary particles formed by agglomeration of primary particles, and the second material has a lower discharge platform voltage than the first material with respect to a same type of counter electrode.