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：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：US20220085379A1

公开(公告)日：2022-03-17

申请号：US17536103

申请日：2021-11-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xin LIU ,  Shiwen WANG ,  Qisen HUANG ,  Cheng LI ,  Mingling Ll ,  Jia PENG ,  Xianghui LIU

IPC: H01M4/66 ,  H01M4/36 ,  H01M10/0525

Abstract: The present application discloses a positive electrode current collector, a positive electrode plate, an electrochemical device, and an apparatus. The positive electrode current collector includes a polymer material-based support layer and an aluminum-based conductive layer disposed on at least one surface of the support layer; a thickness D1 of the aluminum-based conductive layer, a tensile strength T of the support layer, and a thickness D2 of the support layer satisfy a relational formula 0.01≤(200×D1)/(T×D2)≤0.5, in the formula D1 and D2 are in the same unit, and T is in MPa. The positive electrode current collector has relatively high mechanics and mechanical properties, good electrical conductivity and current collection performance and low weight, which can improve preparation yield of the positive electrode current collector, the positive electrode plate and the electrochemical device and their reliability during use.

公开(公告)号：US20240141532A1

公开(公告)日：2024-05-02

申请号：US18540081

申请日：2023-12-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jia PENG ,  Mingling LI ,  Xin LIU ,  Qisen HUANG

IPC: C25D3/38 ,  C25D17/10

CPC classification number: C25D3/38 ,  C25D17/10

Abstract: A negative electrode composite current collector including a copper plating solution is described. The copper plating solution includes a leveling agent represented by a general formula (1)






where an anion X is F−, Cl−, or Br−;
R1, R2, and R3 are each independently selected from O or S; and
R4, R5, and R6 are each independently selected from hydrogen, a substituted or unsubstituted alkyl, a substituted or unsubstituted vinyl, a substituted or unsubstituted aryl, and a substituted or unsubstituted heteroaryl.

公开(公告)号：US20230112962A1

公开(公告)日：2023-04-13

申请号：US17984276

申请日：2022-11-10

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jia PENG ,  Mingling LI ,  Xin LIU ,  Qisen HUANG

IPC: H01M4/66 ,  H01M4/04

Abstract: The present disclosure relates to a composite positive electrode current collector. On a surface of an insulation layer, a protective layer, a graphene metallization layer and a conductive layer may be arranged in sequence; and the protective layer may comprise a metal oxide, and the graphene metallization layer may contain highly reduced graphene oxide having an oxygen-containing organic group.

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：US20230187655A1

公开(公告)日：2023-06-15

申请号：US18069586

申请日：2022-12-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Mingling LI ,  Jia PENG ,  Xin LIU ,  Qisen HUANG ,  Keqiang LI ,  Cheng LI ,  Xianghui LIU

IPC: H01M4/66 ,  H01M4/82

CPC classification number: H01M4/667 ,  H01M4/82 ,  H01M4/661 ,  H01M4/668 ,  H01M2004/021

Abstract: A composite current collector includes a support layer and a conductive layer. The support layer has two surfaces opposite to each other along a thickness direction. The conductive layer is provided on the two surfaces and includes a first portion and a second portion. The first portion includes a first sub-portion and a second sub-portion provided on the two surfaces, respectively. The second portion includes a third sub-portion and a fourth sub-portion. The third sub-portion and the first sub-portion are integrally provided. The fourth sub-portion and the second sub-portion are integrally provided. The third sub-portion and the fourth sub-portion both project from the support layer. The third sub-portion and the fourth sub-portion are affixed to each other and fused as a whole.

公开(公告)号：US20230132206A1

公开(公告)日：2023-04-27

申请号：US17901101

申请日：2022-09-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jia PENG ,  Mingling LI ,  Xin LIU ,  Qisen HUANG

IPC: C25D3/38 ,  C25D17/10

Abstract: This application provides a copper plating solution for a composite current collector, including a leveling agent represented by a general formula (1) where an anion X is F−, Cl−, or Br−; R1, R2, and R3 are each independently selected from O or S; and R4, R5, and R6 are each independently selected from hydrogen, a substituted or unsubstituted alkyl, a substituted or unsubstituted vinyl, a substituted or unsubstituted aryl, and a substituted or unsubstituted heteroaryl.

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.