公开(公告)号：US20210151770A1

公开(公告)日：2021-05-20

申请号：US17128090

申请日：2020-12-19

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xin LIU ,  Qisen HUANG ,  Shiwen WANG ,  Xianghui LIU ,  Jia PENG ,  Mingling LI ,  Changliang SHENG

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

Abstract: The present disclosure provides a lithium ion secondary battery, a battery core, a negative electrode plate and an apparatus containing the lithium ion secondary battery. The lithium ion secondary battery includes a battery core and an electrolytic solution, the battery core including a positive electrode plate comprising a positive current collector and a positive active material layer, a separator, and a negative electrode plate comprising a negative current collector and a negative active material layer, wherein the positive current collector and/or the negative current collector are a composite current collector, the composite current collector comprises a polymer-based support layer and a conductive layer disposed on at least one surface of the support layer, and the composite current collector has a thermal conductivity in a range of 0.01 W/(m·K) to 10 W/(m·K), preferably in a range of 0.1 W/(m·K) to 2 W/(m·K).

公开(公告)号：US20200006775A1

公开(公告)日：2020-01-02

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

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：US20220209226A1

公开(公告)日：2022-06-30

申请号：US17697930

申请日：2022-03-18

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Cheng LI ,  Qisen HUANG ,  Xin LIU ,  Changliang SHENG ,  Shiwen WANG ,  Xianghui LIU ,  Jia PENG ,  Mingling LI ,  Chengdu LIANG

IPC: H01M4/38 ,  H01M4/583 ,  H01M4/66 ,  H01M4/04

Abstract: This application relates to a negative electrode plate, a secondary battery and apparatus thereof. The secondary battery of the present application comprises a negative electrode plate, the negative electrode plate comprises a composite current collector and a negative electrode active material layer disposed on at least one surface of the composite current collector, the negative electrode active material layer comprises a silicon-based active material, the silicon-based active material accounts for 0.5 wt % to 50 wt % of total mass of the negative electrode active material layer, and the composite current collector comprises a polymer support layer and a metal conductive layer disposed on at least one surface of the polymer support layer, and the composite current collector has a brittleness parameter C ranging from 0.03 to 0.5. The secondary battery and the negative electrode plate achieve good coordination between the current collector and the negative electrode active material layer.

公开(公告)号：US20200006754A1

公开(公告)日：2020-01-02

申请号：US16452541

申请日：2019-06-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Changliang SHENG ,  Huafeng HUANG ,  Qisen HUANG

IPC: H01M4/139 ,  H01M4/36 ,  H01M10/0585 ,  H01M10/0525

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 disposed on at least one surface of the negative current collector, the negative active material layer comprising opposite first surface and second surface, wherein the first surface is disposed away from the negative current collector; and an inorganic dielectric layer consisting of an inorganic dielectric material disposed on the first surface of the negative active material layer. 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：US20210313567A1

公开(公告)日：2021-10-07

申请号：US17345159

申请日：2021-06-11

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M4/38 ,  H01M10/0525

Abstract: The present application discloses a negative electrode plate, an electrode assembly, a lithium ion battery, preparation process thereof, and apparatus containing lithium-ion battery. The negative electrode plate includes a negative electrode active material layer comprising a negative electrode active material, the negative electrode active material comprising a silicon-based material; 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 channel penetratingly arranged along a thickness direction of the main body portion; 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：US20200006756A1

公开(公告)日：2020-01-02

申请号：US16452543

申请日：2019-06-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Huafeng HUANG ,  Changliang SHENG ,  Cheng LI ,  Qisen HUANG

IPC: H01M4/1393 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1391 ,  H01M4/64

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. 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：US20240113288A1

公开(公告)日：2024-04-04

申请号：US18523929

申请日：2023-11-30

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Cheng LI ,  Qisen HUANG ,  Xin LIU ,  Changliang SHENG ,  Shiwen WANG ,  Xianghui LIU ,  Jia PENG ,  Mingling LI ,  Chengdu LIANG

IPC: H01M4/38 ,  H01M4/04 ,  H01M4/583 ,  H01M4/66

CPC classification number: H01M4/382 ,  H01M4/0404 ,  H01M4/0421 ,  H01M4/583 ,  H01M4/663 ,  H01M4/667 ,  H01M4/668 ,  H01M2004/027

Abstract: This application relates to a negative electrode plate, a secondary battery and apparatus thereof. The secondary battery of the present application comprises a negative electrode plate, the negative electrode plate comprises a composite current collector and a negative electrode active material layer disposed on at least one surface of the composite current collector, the negative electrode active material layer comprises a silicon-based active material, the silicon-based active material accounts for 0.5 wt % to 50 wt % of total mass of the negative electrode active material layer, and the composite current collector comprises a polymer support layer and a metal conductive layer disposed on at least one surface of the polymer support layer. The secondary battery and the negative electrode plate achieve good coordination between the current collector and the negative electrode active material layer.

公开(公告)号：US20230071180A1

公开(公告)日：2023-03-09

申请号：US17964074

申请日：2022-10-12

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Cheng LI ,  Changliang SHENG ,  Huafeng HUANG ,  Qisen Huang

IPC: H01M4/62 ,  C23C14/00 ,  C23C14/08 ,  C23C14/30 ,  H01M4/04 ,  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：US20220085380A1

公开(公告)日：2022-03-17

申请号：US17537516

申请日：2021-11-30

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xin LIU ,  Qisen HUANG ,  Shiwen WANG ,  Changliang SHENG ,  Jia PENG ,  Mingling LI ,  Xianghui LIU

IPC: H01M4/66 ,  H01M4/02

Abstract: The present application discloses a negative electrode current collector, a negative electrode plate and an electrochemical device. The negative electrode current collector includes an organic support layer and a copper-based conductive layer disposed on at least one surface of the organic support layer; and a copper-based crystal grain size in the copper-based conductive layer is from 10 nm to 500 nm. The negative electrode current collector provided by the present application has good mechanics properties while having less weight and good electrical conductivity and current collection performance, which can improve preparation yields of the negative electrode current collector, the negative electrode plate and the electrochemical device and their safety and reliability during use, and enables the electrochemical device to have relatively high gravimetric energy density and good electrochemical performance.

公开(公告)号：US20210210749A1

公开(公告)日：2021-07-08

申请号：US17057062

申请日：2019-09-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yuqun ZNEG ,  Chengdu LIANG ,  Changliang SHENG ,  Huafeng HUANG ,  Qisen HUANG

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

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.