公开(公告)号：US20220223834A1

公开(公告)日：2022-07-14

申请号：US17708302

申请日：2022-03-30

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei WANG

IPC: H01M4/13 ,  H01M4/66 ,  H01M10/0567 ,  H01M10/0525 ,  H01M10/42 ,  C07F9/6574

Abstract: An electrochemical apparatus, including a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes a negative electrode current collector and a negative electrode active substance layer formed on the negative electrode current collector. The negative electrode current collector has a high tensile strength and the negative electrode active substance layer has a specific weight. The electrochemical apparatus has improved high-temperature storage expansion performance and cyclic expansion performance.

公开(公告)号：US20220123357A1

公开(公告)日：2022-04-21

申请号：US17485807

申请日：2021-09-27

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei WANG ,  Bing JIANG

IPC: H01M10/0525 ,  H01M4/04 ,  H01M4/62 ,  H01M4/583 ,  H01M10/0569 ,  H01M10/0568 ,  H01M10/0567

Abstract: An electrochemical apparatus, including a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector, and the negative electrode mixture layer includes a negative electrode active substance. An elongation at a yield point of the negative electrode mixture layer and D50 of the negative electrode active substance satisfy a specified relationship, and the electrolyte includes a compound having a cyano group.

公开(公告)号：US20210376328A1

公开(公告)日：2021-12-02

申请号：US17056073

申请日：2019-12-25

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kefei WANG ,  Qingwen ZHANG ,  Zhen DAI ,  Yingying WANG

IPC: H01M4/62 ,  H01M4/133 ,  H01M4/587 ,  H01M4/36

Abstract: An electrochemical device, including a cathode; an anode; and an electrolyte. The anode has an anode mixture layer on an anode current collector, the anode mixture layer includes a carbon material as an anode active material, and at least a part of a surface of the anode mixture layer or a surface of the carbon material comprises a polymer compound having Si—C and Si—O bonds. The electrochemical device has improved cycle performance and storage performance.

公开(公告)号：US20200303767A1

公开(公告)日：2020-09-24

申请号：US16419664

申请日：2019-05-22

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kefei WANG

IPC: H01M10/0525 ,  H01M4/60 ,  H01M4/36 ,  H01M4/583 ,  H01M10/0567 ,  H01M10/0568

Abstract: This application relates to an electrochemical device and an electronic device including the same. In particular, this application provides an electrochemical device, including a cathode, an anode and an electrolytic solution, where the anode includes a carbon material and hydroxyalkyl methylcellulose, and the electrolytic solution includes propionate. The electrochemical device of this application has excellent cycle, storage and low-temperature performance.

公开(公告)号：US20250062409A1

公开(公告)日：2025-02-20

申请号：US18937344

申请日：2024-11-05

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei WANG ,  Qiao ZENG ,  Liangzhen XIAO ,  Fei WU

IPC: H01M10/0566 ,  H01M4/13 ,  H01M4/64 ,  H01M4/70 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569

Abstract: An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein, about 3 wt %≤(X+Y)≤ about 11 wt %, about 0.5

公开(公告)号：US20250062408A1

公开(公告)日：2025-02-20

申请号：US18937303

申请日：2024-11-05

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei WANG ,  Qiao ZENG ,  Liangzhen XIAO ,  Fei WU

IPC: H01M10/0566 ,  H01M4/13 ,  H01M4/64 ,  H01M4/70 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569

Abstract: An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein, about 3 wt %≤(X+Y)≤about 11 wt %, about 1≤(X/Y)≤about 6, and about 0.01

公开(公告)号：US20240274819A1

公开(公告)日：2024-08-15

申请号：US18618167

申请日：2024-03-27

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei WANG

IPC: H01M4/60 ,  H01M4/02 ,  H01M4/04 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0567

CPC classification number: H01M4/602 ,  H01M4/0404 ,  H01M4/621 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2004/028

Abstract: An electrochemical device includes: a positive electrode, a negative electrode and an electrolytic solution, the positive electrode includes a positive electrode current collector and a positive active material layer located on the positive electrode current collector, and the positive active material layer includes a positive active material, wherein based on the mass of the positive active material layer, the mass percentage of the positive active material is M %, the value range of M is 95 to 99, the cracking width of the surface of the positive active material layer is W mm, and M and W satisfy: M/W≥47.5.

公开(公告)号：US20240243265A1

公开(公告)日：2024-07-18

申请号：US18621801

申请日：2024-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei WANG ,  Dongdong HAN ,  Qingwen ZHANG ,  Shengqi LIU

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0567

CPC classification number: H01M4/366 ,  H01M4/623 ,  H01M10/0567 ,  H01M2004/028 ,  H01M10/0525 ,  H01M2300/0025

Abstract: A positive electrode includes a current collector and a positive electrode active material layer. The positive electrode active material layer is located on at least one surface of the current collector and includes a first positive electrode active material layer and a second positive electrode active material layer. The first positive electrode active material layer is located between the current collector and the second positive electrode active material layer, where an adhesion force between the current collector and the first positive electrode active material layer is F1 N/m, and a cohesion force of the second positive electrode active material layer is F2 N/m, the positive electrode satisfying F1/F2≥6.

公开(公告)号：US20240234741A9

公开(公告)日：2024-07-11

申请号：US18539272

申请日：2023-12-14

Applicant: Ningde Amperex Technology Limited

Inventor： Changchao DU ,  Kefei WANG ,  Feng ZHOU ,  Qingwen ZHANG

IPC: H01M4/66 ,  H01M4/133 ,  H01M10/0525

CPC classification number: H01M4/663 ,  H01M4/133 ,  H01M4/667 ,  H01M10/0525 ,  H01M2004/027

Abstract: An electrochemical device includes a negative electrode sheet. The negative electrode sheet includes a current collector, a first coating layer, and a second coating layer. The first coating layer is located between the current collector and the second coating layer. The second coating layer includes a negative active material. The first coating layer includes a conductive carbon material. The conductive carbon material includes at least one of carbon nanotubes or graphene. Based on a mass of the first coating layer, a mass percent of the conductive carbon material is 20% to 60%. The main material of the first coating layer is at least one of carbon nanotubes or graphene.

公开(公告)号：US20230352734A1

公开(公告)日：2023-11-02

申请号：US18347053

申请日：2023-07-05

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kefei WANG ,  Qiao ZENG ,  Liangzhen XIAO ,  Fei WU

IPC: H01M10/0566 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/64 ,  H01M4/13

CPC classification number: H01M10/0566 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/64 ,  H01M4/13 ,  H01M2300/0025 ,  H01M2300/0034 ,  H01M2300/0037

Abstract: An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the weight percentage of the dinitrile compound is X, the weight percentage of the trinitrile compound is Y, and the weight percentage of the propyl propionate is Z, wherein, about 2.2 wt %≤(X+Y)≤about 8 wt %, about 0.1≤(X/Y)≤about 2.3, about 5 wt %≤Z≤about 50 wt %, 1 wt %