公开(公告)号：US20230042859A1

公开(公告)日：2023-02-09

申请号：US17957002

申请日：2022-09-30

Applicant: Ningde Amperex Technology Limited

Inventor： Jun He ,  Hui Cui ,  Qiang Zheng ,  Zhanzhao Fang

IPC: H01M10/44 ,  H01M10/42 ,  H01M50/491 ,  H02J7/00

Abstract: A method for enhancing battery cycle performance. The method is applied in a battery and includes: charging, at a first stage, the battery at a first-stage current until reaching a first-stage voltage; and charging, at a second stage, the battery at a second-stage current until reaching a second-stage voltage. The second-stage voltage is greater than the first-stage voltage, and the second-stage current is less than the first-stage current. The battery includes an electrolytic solution containing an organic solvent. The organic solvent includes a chain carboxylate compound. A weight percent of the chain carboxylate compound in the organic solvent is 10% to 70%. This application further provides an electronic device. The method can enhance high-temperature cycle and storage performance of the battery.

公开(公告)号：US12230762B2

公开(公告)日：2025-02-18

申请号：US17281545

申请日：2020-03-31

Applicant: Ningde Amperex Technology Limited

Inventor： Hui Cui ,  Jianming Zheng ,  Xiang Wang ,  Mingming Guan

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567

Abstract: An electrochemical apparatus includes an electrolyte, a positive electrode and a negative electrode, the negative electrode includes a negative active material layer, the negative active material layer includes a negative active material, the electrolyte includes fluoroethylene carbonate, and the electrochemical apparatus satisfies the following relational expressions: 0.5

公开(公告)号：US20230117982A1

公开(公告)日：2023-04-20

申请号：US17795927

申请日：2020-03-26

Applicant: Ningde Amperex Technology Limited

Inventor： Zhanzhao Fang ,  Hui Cui ,  Hanxiang Zhang

IPC: H01M10/0567 ,  H02J7/00 ,  H01M10/44

Abstract: A method for enhancing battery cycle performance is applied in a battery and includes the following steps: charging, at a first stage, the battery at a first-stage current until reaching a first-stage voltage; and charging, at a second stage, the battery at a second-stage current until reaching a second-stage voltage. The second-stage voltage is greater than the first-stage voltage. The second-stage current is less than the first-stage current. The battery includes an electrolytic solution containing an additive. The additive includes a nitrile compound. A mass percent of the nitrile compound in the electrolytic solution is 0.5% to 5%. This application further provides an electronic device. The method and electronic device according to this application can enhance high-temperature cycle performance of the battery, reduce a high-temperature storage expansion rate, and enhance hot-oven safety performance.

公开(公告)号：US20220123365A1

公开(公告)日：2022-04-21

申请号：US17281545

申请日：2020-03-31

Applicant: Ningde Amperex Technology Limited

Inventor： Hui Cui ,  Jianming Zheng ,  Xiang Wang ,  Mingming Guan

IPC: H01M10/0569 ,  H01M10/0525

Abstract: An electrochemical apparatus includes an electrolyte, a positive electrode and a negative electrode, the negative electrode includes a negative active material layer, the negative active material layer includes a negative active material, the electrolyte includes fluoroethylene carbonate, and the electrochemical apparatus satisfies the following relational expressions: 0.5

公开(公告)号：US20230299354A1

公开(公告)日：2023-09-21

申请号：US18131409

申请日：2023-04-06

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Hui Cui ,  Jian Liu ,  Xiexue Peng ,  Chao Tang

IPC: H01M10/0567 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M10/0569 ,  H01M2300/0042 ,  H01M2300/0034

Abstract: An electrolyte includes a first composition and a second composition. The first composition includes at least one of a compound shown in formula I-A, a compound shown in formula I-B, or a compound shown in formula I-C, and the second composition includes a compound shown in formula II. A11 to A16, R11 to R17, R21 to R22, L, and n are separately defined in this specification. The electrolyte can make the electrochemical apparatus and the electronic apparatus have both significantly improved high-temperature resistance performance and safety performance.

公开(公告)号：US11742518B2

公开(公告)日：2023-08-29

申请号：US16770783

申请日：2019-12-24

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Hui Cui ,  Shuirong Zhang ,  Chao Tang ,  Jianming Zheng

IPC: H01M10/0567 ,  H01M50/417 ,  H01M50/491 ,  H01M4/131 ,  H01M4/66 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M4/587

CPC classification number: H01M10/0567 ,  H01M4/131 ,  H01M4/587 ,  H01M4/662 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M50/417 ,  H01M50/491 ,  H01M2300/0028

Abstract: An electrolyte includes at least one of a compound of Formula I, a compound of Formula II or a compound of Formula III; and a compound of Formula IV; where,




R11, R12, R13, R21, R22, R31, R32, R33 and R34 are independently selected from H, halo, cyano, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C10 alkenyl, and substituted or unsubstituted C6-C12 aryl; R41 and R44 are independently selected from H, F, cyano, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C10 alkenyl, substituted or unsubstituted C6-C12 aryl, Ra—(O—Rb), or (O—Rb); and R42 and R43 are independently selected from Rc—(O—Rd) or (O—Rd). Rb is selected from substituted or unsubstituted C1-C4 alkyl; Ra, Rc and Rd are independently selected from substituted or unsubstituted C1-C4 alkylene, C2-C5 alkenylene, or C6-C12 aryl.