公开(公告)号：US11539050B2

公开(公告)日：2022-12-27

申请号：US15827214

申请日：2017-11-30

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu Liang ,  Huafeng Huang ,  Qisen Huang

IPC: H01M4/66 ,  H01M10/052 ,  H01M4/64 ,  H01M10/0525

Abstract: Provided are a current collector, an electrode plate, a battery and an application of the current collector. The current collector includes an insulation layer and a conductive layer. The insulation layer is configured to bear the conductive layer, the conductive layer is configured to bear an electrode active material layer. A room temperature film resistance RS of the conductive layer meets a conditional expression: 0.016Ω/□≤RS≤420Ω/□. By the current collector of the present application, the short circuit resistance of the battery in case of an abnormal situation causing the short circuit can be greatly increased, and the short circuit current can be greatly reduced. Thus, influence of the short circuit damage on the battery is limited to a point range, and an interrupt in the current only occurs in a point range, without disrupting normal operation of the battery in a certain period time.

公开(公告)号：US11522194B2

公开(公告)日：2022-12-06

申请号：US16452542

申请日：2019-06-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Cheng Li ,  Changliang Sheng ,  Huafeng Huang ,  Qisen Huang

IPC: H01M4/04 ,  H01M4/02 ,  H01M4/62 ,  C23C14/00 ,  C23C14/08 ,  C23C14/30 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/587

Abstract: The invention refers to negative electrode plate, preparation method thereof and electrochemical device. The negative electrode plate comprises: a negative current collector, a negative active material layer, and an inorganic dielectric layer which are provided in a stacked manner; the negative active material layer comprises opposite first surface and second surface, wherein the first surface is disposed away from the negative current collector; the inorganic dielectric layer is disposed on the first surface of the negative active material layer and consists of an inorganic dielectric material. The negative electrode plate provided by the application is useful in an electrochemical device, and can result in an electrochemical device having simultaneously excellent safety performance and cycle performance.

公开(公告)号：US11342547B2

公开(公告)日：2022-05-24

申请号：US16235625

申请日：2018-12-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M4/00 ,  H01M4/131 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/1397 ,  H01M4/136 ,  H01M50/46 ,  H01M10/0525 ,  H01M4/02 ,  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：US11005105B2

公开(公告)日：2021-05-11

申请号：US16389713

申请日：2019-04-19

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Huafeng Huang ,  Qisen Huang ,  Xin Liu

IPC: H01M4/66 ,  H01M4/74 ,  H01M4/02

Abstract: The present disclosure relates to the technical field of battery, and in particular, relates to a current collector, an electrode plate and an electrochemical device. The current collector includes an insulation layer; a conductive layer located on at least one surface of the insulation layer; and a first protective layer provided on a surface of the conductive layer facing away from the insulation layer. The first protective layer is made of a metal. The current collector is provided with a plurality of holes penetrating through the insulation layer, the conductive layer and the first protective layer.

公开(公告)号：US10944112B2

公开(公告)日：2021-03-09

申请号：US16366357

申请日：2019-03-27

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Huafeng Huang ,  Qisen Huang ,  Xin Liu

IPC: H01M4/66 ,  H01M4/80 ,  H01M4/70 ,  H01M4/13 ,  H01M4/02

Abstract: The present disclosure relates to the technical field of battery, and in particular, relates to a current collector, an electrode plate including the current collector, and an electrochemical device. The current collector includes an insulation layer; and a conductive layer at least located on at least one surface of the insulation layer. The conductive layer has a thickness of D2, where 30 nm≤D2≤3 μm. The current collector is provided with a plurality of holes penetrating through the insulation layer and the conductive layer.

公开(公告)号：US10862090B2

公开(公告)日：2020-12-08

申请号：US16211582

申请日：2018-12-06

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M2/16 ,  H01M2/14 ,  H01M10/0563 ,  H01M10/052 ,  H01M10/42 ,  H01M10/0525

Abstract: The present disclosure relates to a composite separator, a preparation method of the composite separator, and an electrochemical device containing the composite separator. The composite separator includes a substrate and an inorganic layer disposed on at least one surface of the substrate. The substrate is a porous substrate, and the inorganic layer is an inorganic dielectric layer which is a continuous dense film layer with porosity lower than 10% and contains no binder. A thickness of the inorganic layer is 20 nm-1000 nm. An interfacial peeling force between the inorganic layer and the substrate is no less than 30 N/m. The separator of the present application has high wettability with respect to electrolyte, almost no thermal shrinkage, relatively high mechanical strength, and favorable corrosion resistance and durability performances, and thus, a battery using the separator has relatively high thermal stability and nailing strength.

公开(公告)号：US10811660B2

公开(公告)日：2020-10-20

申请号：US16211526

申请日：2018-12-06

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M2/16 ,  H01M2/14 ,  H01M10/0525 ,  C23C14/00 ,  C23C14/02 ,  C23C14/08 ,  C23C14/28

Abstract: A separator, a method for preparing the separator, and an electrochemical device containing the separator. The separator includes a substrate and an inorganic layer disposed on at least one side of the substrate. The substrate is a porous substrate. The inorganic layer is a dielectric layer containing no binder. The inorganic layer has a thickness of 20 nm to 2000 nm. A mass of the inorganic layer is M1, a mass of the substrate is M2, and M1/M2 is greater than or equal to 0.05 but smaller than or equal to 7.5. An interfacial peeling force between the inorganic layer and the substrate is not smaller than 30 N/m. The interfacial wettability and thermal shrinkage resistance performance of the separator are effectively improved while the separator has a certain mechanical strength. The separator can have favorable mechanical strength and thermal shrinkage percentage and high energy density.

公开(公告)号：US10763513B2

公开(公告)日：2020-09-01

申请号：US16209317

申请日：2018-12-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu Liang ,  Huafeng Huang ,  Qisen Huang

IPC: H01M4/66 ,  H01M10/0525 ,  H01M10/052 ,  H01M4/02 ,  H01M10/42 ,  H01M4/64

Abstract: The present disclosure provides a current collector, an electrode plate, and a battery. The current collector includes an insulation layer, a conductive layer and at least one protective layer. The insulation layer is used to support the conductive layer. The conductive layer is used to support an electrode active material layer and located above at least one surface of the insulation layer. The conductive layer has a thickness of D2 satisfying 300 nm≤D2≤2 μm. The at least one protective layer is arranged on at least one surface of the conductive layer.

公开(公告)号：US10714757B2

公开(公告)日：2020-07-14

申请号：US16209377

申请日：2018-12-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu Liang ,  Huafeng Huang ,  Zuyu Wu ,  Qisen Huang

IPC: H01M4/66 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/02 ,  H01M10/052

Abstract: The present disclosure provides a current collector, an electrode plate and a battery. The current collector includes an insulation layer and at least one conductive layer located on at least one surface of the insulation layer. The insulation layer is used to support the conductive layer, and the conductive layer is used to support an electrode active material layer. The conductive layer has a thickness of D2, and 300 nmD22 μm. The current collector further includes a protective layer provided on a surface of the conductive layer facing towards the insulation layer. The current collector according to the present disclosure can increase a short-circuit resistance in case of short circuit caused by the battery being abnormal, thereby resulting in protective effect on the conductive layer, and can also increase the bonding force between the insulation layer and the conductive layer, thereby increasing mechanical strength of the current collector.

公开(公告)号：US20190173089A1

公开(公告)日：2019-06-06

申请号：US16209425

申请日：2018-12-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu Liang ,  Huafeng Huang ,  Qisen Huang

IPC: H01M4/66 ,  H01M2/34 ,  H01M10/48 ,  H01M10/0525

Abstract: The present application relates to a current collector, an electrode plate, a battery and usages thereof. The current collector includes at least one conductive layer configured to support an electrode active material layer, and an insulation layer configured to support the at least one conductive layer. The conductive layer has a room temperature film resistance RS satisfying 0.01Ω/□RS≤0.15Ω/□. The current collector can significantly increase resistance in short-circuit and reduce current in the short-circuit, and reduce heat generated during the short-circuit and improving safety performance. The heat can be totally absorbed by the battery. Therefore, the resulted temperature rise of the battery is small, the damage to the battery caused by the short circuit can be limited to a “point”, and only a “point break” is formed, without influencing normal operation of the battery in a short time.