公开(公告)号：US20200328384A1

公开(公告)日：2020-10-15

申请号：US16574966

申请日：2019-09-18

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Kai Wu ,  Baisong Chen

IPC: H01M2/04 ,  H01M2/06 ,  H01M2/08

Abstract: The present disclosure relate to the technical field of secondary batteries, and in particular, to a secondary battery and a top cover component thereof. The top cover component provided by the present disclosure includes a top cover plate having an electrode lead-out hole, and a second sealing portion and a second insulating portion stretching into the electrode lead-out hole, and the second sealing portion and the second insulating portion are at least partially staggered to each other on the radial direction of the electrode lead-out hole and are at least partially overlapped on the height direction. Based on this, a direct discharge clearance can be effectively blocked, and the creepage distance can be prolonged, thereby being conducive to reducing the risk of on fire or explosion and other problems of the secondary battery while withstanding a high voltage.

公开(公告)号：US10658673B2

公开(公告)日：2020-05-19

申请号：US16161978

申请日：2018-10-16

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Huafeng Huang ,  Qisen Huang

IPC: H01M4/66 ,  H01M10/42 ,  H01M4/02 ,  H01M4/62 ,  H01M4/36 ,  H01M10/0525 ,  H01M10/056 ,  H01M4/04

Abstract: A battery is provided in the present disclosure. The battery includes: a positive electrode plate including a positive current collector and a positive active material layer; a negative electrode plate including a positive current collector and a negative active material layer; and an electrolyte. The positive current collector includes an insulation layer used to support a conductive layer and the conductive layer used to support the positive active material layer and located above at least one surface of the insulation layer. The conductive layer has a thickness of D2 which satisfies: 300 nm≤D2≤2 μm. A protective layer is arranged on at least one surface of the conductive layer. The negative current collector is a copper foil current collector having a thickness of 6 μm to 12 μm.

公开(公告)号：US12119483B2

公开(公告)日：2024-10-15

申请号：US17536118

申请日：2021-11-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Changliang Sheng ,  Shiwen Wang ,  Qisen Huang ,  Cheng Li ,  Chengdu Liang

IPC: H01M4/36 ,  H01M4/13 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/366 ,  H01M4/13 ,  H01M4/382 ,  H01M4/628 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: The present application discloses a negative electrode plate, an electrode assembly, a lithium-ion battery and process for the preparation thereof, and apparatus containing lithium-ion battery. The negative electrode plate includes a negative electrode current collector; a negative electrode active material layer disposed on the negative electrode current collector; a binder-free inorganic dielectric layer disposed on one side of the negative electrode active material layer away from the negative electrode current collector, the inorganic dielectric layer comprising an inorganic dielectric material, and the inorganic dielectric layer including at least a main body portion disposed on the surface of the negative electrode active material layer, the main body portion having a thickness of from 30 nm to 1000 nm; and a lithium metal layer disposed on the surface of the inorganic dielectric layer away from the negative electrode active material layer.

公开(公告)号：US12107255B2

公开(公告)日：2024-10-01

申请号：US17723531

申请日：2022-04-19

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Shiwen Wang ,  Qisen Huang ,  Huafeng Huang ,  Chengdu Liang

IPC: H01M4/00 ,  H01M4/04 ,  H01M4/131 ,  H01M4/136 ,  H01M4/1391 ,  H01M4/1397 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M10/0525 ,  H01M50/46 ,  H01M4/02 ,  H01M10/052

CPC classification number: H01M4/131 ,  H01M4/0421 ,  H01M4/0423 ,  H01M4/0428 ,  H01M4/136 ,  H01M4/1391 ,  H01M4/1397 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/0525 ,  H01M50/46 ,  H01M2004/021 ,  H01M2004/028 ,  H01M4/0426 ,  H01M10/052

Abstract: The present disclosure relates to the technical field of energy storage, and in particular, relates to a positive electrode, a method for preparing the positive electrode and an electrochemical device. The positive electrode includes a current collector and a positive electrode active material layer that contains positive electrode active material and is arranged on at least one surface of the current collector. An inorganic layer having a thickness of 20 nm to 2000 nm is arranged on the surface of the at least one positive electrode active material layer away from the current collector. The inorganic layer is a porous dielectric layer containing no binder, and the inorganic layer has a porosity of 10%˜60%. The positive electrode active material layer according to the present disclosure significantly improves the cycle performance, high-temperature storage performance and safety of the electrochemical device.

公开(公告)号：US12107224B2

公开(公告)日：2024-10-01

申请号：US17620336

申请日：2019-11-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu Liang ,  Chengyong Liu ,  Yongsheng Guo ,  Quan Fan

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/42 ,  H01M50/46

CPC classification number: H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/4235 ,  H01M50/46 ,  H01M2004/028 ,  H01M2220/20 ,  H01M2300/0025

Abstract: An electrolyte for a lithium-ion battery, a lithium-ion battery, a battery module, a battery pack, and an apparatus are provided. The electrolyte includes an organic solvent, an electrolyte lithium salt dissolved in the organic solvent, and an additive, where the additive is a compound represented by following formula I. The electrolyte can inhibit generation of lithium dendrites in the lithium-ion battery, improve cycle performance of the battery, and also improve flame retardancy of the battery, thereby effectively resolving defects in the existing technology.

公开(公告)号：US12074315B2

公开(公告)日：2024-08-27

申请号：US17057062

申请日：2019-09-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yuqun Zeng ,  Chengdu Liang ,  Changliang Sheng ,  Huafeng Huang ,  Qisen Huang

IPC: H01M4/36 ,  C01G53/00 ,  H01M4/131 ,  H01M4/1315 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/366 ,  C01G53/50 ,  H01M4/131 ,  H01M4/1315 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028 ,  H01M2220/20

Abstract: This application discloses a positive-electrode plate, a lithium-ion battery equipped with the positive-electrode plate, a battery module, a battery pack, and an apparatus. The lithium-ion battery includes a positive-electrode plate, a negative-electrode plate, a separator, and an electrolyte. The positive-electrode plate includes a positive-electrode current collector and a positive-electrode active substance layer that is disposed on a surface of the positive-electrode current collector and that includes a positive-electrode active substance. An inorganic dielectric layer containing no binder is disposed on a surface of the positive-electrode active substance layer, and a resistance of the positive-electrode plate is not higher than 8 ohms.

公开(公告)号：US11996548B2

公开(公告)日：2024-05-28

申请号：US16973152

申请日：2020-07-14

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Yuzhen Zhao ,  Yingjie Guan ,  Yan Wen ,  Qisen Huang

IPC: H01M4/38 ,  H01M4/36 ,  H01M4/48 ,  H01M4/62 ,  H01M4/02

CPC classification number: H01M4/366 ,  H01M4/483 ,  H01M4/62 ,  H01M2004/021 ,  H01M2004/027

Abstract: The present application discloses a negative active material, preparation process thereof and a secondary battery and the related battery module, battery pack and device. The negative active material comprises a core structure and a modified polymer coating layer coated on at least a part of the outer surface of the core structure, wherein the core structure comprises one or more of silicon-based materials and tin based materials; and wherein the negative active material has an infrared spectrum comprising an infrared absorption peak at the wavelength of 1450 cm−1 to 1690 cm−1, and the infrared absorption peak has a transmittance T that satisfies 80%≤T≤99%.

公开(公告)号：US11978844B2

公开(公告)日：2024-05-07

申请号：US17135741

申请日：2020-12-28

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Hu Xu ,  Haizu Jin ,  Yuqun Zeng

IPC: H01M10/04 ,  H01M10/0585 ,  H01M10/0587 ,  H01M50/204 ,  H01M50/249

CPC classification number: H01M10/0431 ,  H01M10/0413 ,  H01M10/0585 ,  H01M10/0587 ,  H01M50/204 ,  H01M50/249

Abstract: An electrode assembly and a related battery, and battery module are provided, wherein the electrode assembly includes: at least one positive electrode plate and at least one negative electrode plate, the number of all the positive and negative electrode plates is greater than or equal to 3; the positive and negative electrode plates are wound around the winding axis and arranged in a superimposing manner along a direction vertical to the winding axis, each positive electrode plate includes a positive main body part, at least part of the positive main body part is a positive active substance area, each negative electrode plate includes a negative main body part, at least part of the negative main body part is the negative active substance area, two ends of the negative active substance area along the winding axis both exceed corresponding ends of the adjacent positive active substance area.

公开(公告)号：US11949099B2

公开(公告)日：2024-04-02

申请号：US18108515

申请日：2023-02-10

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu Liang ,  Yongchao Liu ,  Na Liu ,  Yingjie Guan ,  Qisen Huang ,  Wei Fu

IPC: H01M4/36 ,  C01G53/00 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58

CPC classification number: H01M4/366 ,  C01G53/50 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  C01P2004/51

Abstract: The present invention relates to an electrode active material, a preparation method thereof, an electrode, a battery, and an apparatus. The electrode active material includes: a core and a coating layer, where the core includes a ternary material, the coating layer coats the core, the coating layer includes a reaction product of a sulfur-containing compound and a lithium-containing compound, and the reaction product includes element Li, element S, and element O.

公开(公告)号：US11909000B2

公开(公告)日：2024-02-20

申请号：US17820944

申请日：2022-08-19

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chang Peng ,  Peipei Chen ,  Hailin Zou ,  Chengdu Liang

IPC: H01M4/505 ,  H01M4/525 ,  H01M10/0568 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/02

CPC classification number: H01M10/0568 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M2004/028 ,  H01M2220/20 ,  H01M2300/0025

Abstract: A lithium-ion secondary battery is provided, where an electrolyte solution of the lithium-ion secondary battery comprises a highly heat-stable salt (My+)x/yR1(SO2N−)xSO2R2, where the My+ is a metal ion, R1 and R2 are each independently a fluorine atom, an alkyl with 1-20 carbon atoms, a fluoroalkyl with 1-20 carbon atoms, or a fluoroalkoxy with 1-20 carton atoms, x is 1, 2, or 3, and y is 1, 2, or 3. A mass percent of the salt in the electrolyte solution is set as k2%; a temperature rise coefficient k1 of the positive electrode sheet satisfies 2.5≤k1≤32, where k1=Cw/Mc, Cw is a positive electrode material load per unit area (mg/cm2) on the surface of any side of the positive electrode current collector on which a positive electrode material layer is loaded, and Mc is a carbon content (%) of the positive electrode material layer; and the lithium-ion secondary battery satisfies 0.34≤k2/k1≤8.