公开(公告)号：US12206114B2

公开(公告)日：2025-01-21

申请号：US16970789

申请日：2019-12-25

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kefei Wang ,  Zhen Dai ,  Yingying Wang ,  Feng Zhou

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0569

Abstract: An electrochemical device including a cathode, an anode and an electrolyte. The anode includes an anode active material layer, and the contact angle of the anode active material layer relative to a non-aqueous solvent is not greater than 60° as measured by a contact angle measurement. The electrochemical device has improved cycle performance.

公开(公告)号：US11984556B2

公开(公告)日：2024-05-14

申请号：US17990626

申请日：2022-11-18

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kefei Wang ,  Qiao Zeng ,  Liangzhen Xiao ,  Fei Wu

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

CPC classification number: H01M10/0566 ,  H01M4/13 ,  H01M4/64 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  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 6, 1 wt %≤Y

公开(公告)号：US11799130B2

公开(公告)日：2023-10-24

申请号：US17885915

申请日：2022-08-11

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kefei Wang ,  Qiao Zeng ,  Liangzhen Xiao ,  Fei Wu

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

CPC classification number: H01M10/0566 ,  H01M4/13 ,  H01M4/64 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  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; where about 2 wt %≤(X+Y)≤about 11 wt %, about 0.1≤(X/Y)≤about 8, and about 0.01≤(Y/Z)≤about 0.3. The dinitrile compound comprises a compound of Formula (5): N—R2—(O—R3)n—O—R4—CN (5). The electrolyte is capable of effectively inhibiting the increase in DC internal resistance of an electrochemical device so that the electrochemical device has excellent cycle and storage performance.

公开(公告)号：US20210273264A1

公开(公告)日：2021-09-02

申请号：US17326165

申请日：2021-05-20

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei Wang

IPC: H01M10/0569 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/48

Abstract: An electrolyte includes a fluorinated cyclic carbonate, a multi-nitrilemulti-nitrile compound having an ether bond and a compound having a sulfur-oxygen double bond. Based on a total weight of the electrolyte, a weight percentage (Cf) of the fluorinated cyclic carbonate is greater than a weight percentage (Cn) of the multi-nitrilemulti-nitrile compound having an ether bond. The electrolyte can control the expansion of the electrochemical device, so that the electrochemical device has excellent cycle, storage and/or floating-charge performance.

公开(公告)号：US20210194081A1

公开(公告)日：2021-06-24

申请号：US17195508

申请日：2021-03-08

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Jing JIANG ,  Kefei Wang

IPC: H01M50/116 ,  H01M4/62 ,  H01M4/13 ,  H01M10/04 ,  H01M50/24 ,  H01M50/571

Abstract: A battery includes a first conductive layer having a folded portion, a first edge, and a second edge opposite to the first edge in a first direction of the battery; a first conductive plate located on the first conductive layer; and a first layer comprising an insulating material covering at least one portion of the folded portion, and being distant from the first conductive layer. The first layer partially covers the first edge of the first conductive layer

公开(公告)号：US11024884B2

公开(公告)日：2021-06-01

申请号：US16212033

申请日：2018-12-06

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kefei Wang

IPC: H01M10/0525 ,  H01M10/0569 ,  H01M4/13 ,  H01M10/0567 ,  H01M10/48

Abstract: The present application relates to an electrolyte, and an electrochemical device comprising the electrolyte. The electrolyte comprises a fluorinated cyclic carbonate and a multi-nitrilemulti-nitrile compound having an ether bond, wherein based on the total weight of the electrolyte, the weight percentage (Cf) of the fluorinated cyclic carbonate is greater than the weight percentage (Cn) of the multi-nitrilemulti-nitrile compound having an ether bond. The electrolyte of the present application can control the expansion of the electrochemical device, so that the electrochemical device has excellent cycle, storage and/or floating-charge performance.

公开(公告)号：US20190319245A1

公开(公告)日：2019-10-17

申请号：US16174385

申请日：2018-10-30

Applicant: Ningde Amperex Technology Limited

Inventor： Liangzhen Xiao ,  Kefei Wang ,  Qiao Zeng

IPC: H01M2/16 ,  H01M10/0525

Abstract: The present application provides a separator and a lithium ion battery, the separator comprises a first porous substrate, a second porous substrate and a third porous substrate, wherein the second porous substrate is arranged between the first porous substrate and the third porous substrate, and a tensile strength of the separator in amachine direction is greater than a tensile strength of the separator in a transverse direction. The use of the separator of the present application can improve the thermal stability and safety performance of the lithium ion battery.

公开(公告)号：US12255334B2

公开(公告)日：2025-03-18

申请号：US17475062

申请日：2021-09-14

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei Wang ,  Liang Shi

IPC: H01M4/62 ,  H01M4/02

Abstract: An electrochemical device including a positive electrode, a negative electrode, and an electrolytic solution. The negative electrode includes a negative current collector and a negative active material layer formed on the negative current collector. The negative active material layer contains a negative active material. A conductive material is disposed between the negative active material layer and the negative current collector. An average particle diameter of the conductive material is smaller than that of the negative active material. The negative active material layer possesses a specific weight. The electrochemical device improves high-temperature cycle expansion performance and overcharge protection performance.

公开(公告)号：US12176487B2

公开(公告)日：2024-12-24

申请号：US18626603

申请日：2024-04-04

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 2.2 wt %≤(X+Y)≤about 8 wt %, about 0.1≤(X/Y)≤about 6, 1 wt %

公开(公告)号：US12176486B2

公开(公告)日：2024-12-24

申请号：US18626447

申请日：2024-04-04

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei Wang ,  Qiao Zeng ,  Liangzhen Xiao ,  Fei Wu

IPC: H01M4/64 ,  H01M4/13 ,  H01M4/70 ,  H01M10/0525 ,  H01M10/0566 ,  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 2 wt %≤(X+Y)≤about 11 wt %, about 1≤(X/Y)≤about 6, about 40 wt %≤Z≤about 50 wt %, and about 0.01