公开(公告)号：US20230231134A1

公开(公告)日：2023-07-20

申请号：US18176265

申请日：2023-02-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xingyan YOU ,  Yiyang WU ,  Yuwen WANG ,  Chan LIAO ,  Baozhen WU

IPC: H01M4/587 ,  H01M4/38 ,  H01M4/133

CPC classification number: H01M4/587 ,  H01M4/386 ,  H01M4/133 ,  H01M2004/027

Abstract: A secondary battery includes a negative electrode plate including a negative electrode current collector, a first negative electrode material layer including a first negative electrode active material, and a second negative electrode material layer including a second negative electrode active material. The first negative electrode material layer is located between the negative electrode current collector and the second negative electrode material layer. The first negative electrode active material includes a first artificial graphite and a second artificial graphite. The first artificial graphite includes secondary particles. An amorphous carbon coating layer is provided on a surface of the first artificial graphite. The second artificial graphite includes primary particles. No amorphous carbon coating layer is provided on a surface of the second artificial graphite.

公开(公告)号：US20230402708A1

公开(公告)日：2023-12-14

申请号：US18447429

申请日：2023-08-10

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xingyan YOU ,  Wanqiu MENG ,  Baozhen WU ,  Yiyang WU ,  Yuwen WANG ,  Chan LIAO ,  Yonghuang YE

IPC: H01M50/30 ,  H01M10/04 ,  H01M50/609

CPC classification number: H01M50/394 ,  H01M10/049 ,  H01M50/609 ,  H01M10/0404

Abstract: A battery cell, a battery, an electric apparatus, and a manufacturing method and manufacturing device of battery cell are described. The battery cell includes: an electrode assembly; a casing having an accommodating cavity for accommodating the electrode assembly; an exhaust mechanism provided on the casing, the exhaust mechanism including a connecting component and a breathable component, and the breathable component is configured to discharge gas to outside of the casing when gas pressure inside the casing reaches a threshold; and an electrolyte, filled in the casing; where gas permeability A of the breathable component, conductivity S of the electrolyte, and gas containment space V satisfy 20 mm2*ms/cm*ml

公开(公告)号：US20240347691A1

公开(公告)日：2024-10-17

申请号：US18752840

申请日：2024-06-25

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xingyan YOU ,  Yiyang WU ,  Wenlong BAI ,  Baozhen WU

IPC: H01M4/133 ,  H01M4/02 ,  H01M4/36 ,  H01M4/587 ,  H01M50/429 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/451 ,  H01M50/457 ,  H01M50/489

CPC classification number: H01M4/133 ,  H01M4/366 ,  H01M4/587 ,  H01M50/429 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/451 ,  H01M50/457 ,  H01M50/489 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2220/20

Abstract: An electrode assembly includes a negative electrode plate, a positive electrode plate, and a separator located between the negative electrode plate and the positive electrode plate, where the negative electrode plate includes a negative electrode current collector, and a first negative electrode film layer and a second negative electrode film layer disposed on at least one surface of the negative electrode current collector; the first negative electrode film layer is located between the negative electrode current collector and the second negative electrode film layer and includes a first negative electrode active material, the first negative electrode active material includes graphite, the second negative electrode film layer includes a second negative electrode active material, and the second negative electrode active material includes hard carbon; and the separator includes a base film and a functional coating located at least on a side, against the negative electrode plate, of the base film.

公开(公告)号：US20240105939A1

公开(公告)日：2024-03-28

申请号：US18338690

申请日：2023-06-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yiyang WU ,  Yonghuang YE ,  Baozhen WU ,  Kai WU

IPC: H01M4/58 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M4/5825 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028 ,  H01M2220/20

Abstract: A positive electrode plate includes a first active material and a second active material. The first active material is selected from a lithium iron phosphate-based material represented by a formula LiFe1-xMnxPO4, where x is between 0-0.8. The second active material includes one or more of lithium nickelate, lithium manganate, lithium cobaltate, lithium nickel cobalt manganate, lithium nickel cobalt aluminate, a lithium-rich manganese base, and lithium vanadium phosphate. An amount of the second active material used accounts for, by mass, 10-70%, on the basis of a total mass of the first active material and the second active material.

公开(公告)号：US20250015273A1

公开(公告)日：2025-01-09

申请号：US18824084

申请日：2024-09-04

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wei ZHENG ,  Baozhen WU ,  Yuwen WANG ,  Xingyan YOU ,  Wenlong BAI

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/04 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/583 ,  H01M4/62 ,  H01M10/0525

Abstract: Disclosed are an electrode, a preparation method therefor, a battery, and a power consuming device. The electrode according to an embodiment of the present application comprises a current collector and active layers bonded to the current collector, wherein the active layers include a first active layer and a second active layer, the first active layer is bonded to the current collector, the second active layer is bonded to the surface of the first active layer that faces away from the current collector, and the second active layer has a porosity lager than that of the first active layer. The electrode has a high energy density and structural stability and an excellent cycling performance, resulting in a safe battery. The method for preparing an electrode as disclosed results in an electrode with a stable structure and electrochemical performance, and a high efficiency, while saving the production cost.

公开(公告)号：US20240322139A1

公开(公告)日：2024-09-26

申请号：US18679475

申请日：2024-05-31

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xingyan YOU ,  Yiyang WU ,  Wenlong BAI ,  Baozhen WU

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/133 ,  H01M4/587 ,  H01M4/62 ,  H01M10/42

CPC classification number: H01M4/366 ,  H01M4/133 ,  H01M4/587 ,  H01M4/628 ,  H01M10/4235 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2220/20

Abstract: The present application provides a negative electrode plate, a secondary battery, a battery module, a battery pack, and an electrical device. The negative electrode plate includes a negative electrode current collector and a first negative electrode film, a second negative electrode film, and a functional coating sequentially disposed on at least one surface of the negative electrode current collector, wherein the functional coating layer comprises a ferroelectric material; the second negative electrode film comprises a second negative electrode active material, and the second negative electrode active material comprises hard carbon; the first negative electrode film comprises a first negative electrode active material, and the first negative electrode active material comprises graphite. The negative electrode plate provided by the present application can enable the secondary battery to have high charging rate and long cycle life on the premise of high energy density.