公开(公告)号：US20190393558A1

公开(公告)日：2019-12-26

申请号：US16454875

申请日：2019-06-27

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Kefei WANG ,  Fei WU ,  Jinli WANG ,  Jibin GENG

IPC: H01M10/0587 ,  H01M2/18 ,  H01M2/26 ,  H01M10/04 ,  H01M10/0525

Abstract: A cell includes a flat electrode assembly formed by superposing and winding respective first ends of a first electrode sheet, a first separator, a second electrode sheet, and a second separator. A first electrode tab is connected to the first electrode sheet, and a second electrode tab is connected to the second electrode sheet. The second electrode sheet includes a second current collector, a second outer membrane arranged on a surface facing away from a center of the cell, and a second inner membrane arranged on a surface facing the center of the cell. Respective starting ends of the second outer membrane and the second inner membrane are located on the second current collector between the first end of the second electrode sheet and a second bend. The second inner membrane is provided with an inner uncoated region at least at the second bend.

公开(公告)号：US20250062410A1

公开(公告)日：2025-02-20

申请号：US18937394

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 %

公开(公告)号：US20230238822A1

公开(公告)日：2023-07-27

申请号：US18192963

申请日：2023-03-30

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Ting GUAN ,  Shan ZHU ,  Zhiru YANG ,  Fei WU

IPC: H02J7/00

CPC classification number: H02J7/007182 ,  H02J7/0013

Abstract: A charging method for battery. In an n-th charging process, charging a first battery to a charge cut-off voltage Un in a first charging manner, where n is a positive integer; after the n-th charging process is completed, leaving the first battery standing, and obtaining an open-circuit voltage OCVn of the first battery at a standing time of ti; in an m-th charging process, charging the first battery to the charge cut-off voltage Un in the first charging manner, where m is a positive integer, and m>n; after the m-th charging process is completed, leaving the first battery standing, and obtaining an open-circuit voltage OCVm of the first battery at the standing time of ti; and under the condition of OCVn>OCVm, continuing to charge the first battery standing in a second charging manner to a first voltage U′m, where U′m=Un+k×(OCVn−OCVm), and 0

公开(公告)号：US20230128988A1

公开(公告)日：2023-04-27

申请号：US18076882

申请日：2022-12-07

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

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

IPC: H01M10/0566 ,  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 2.3, about 5 wt %≤Z≤about 50 wt %, 1 wt %

公开(公告)号：US20220407081A1

公开(公告)日：2022-12-22

申请号：US17845555

申请日：2022-06-21

Applicant: Ningde Amperex Technology Limited

Inventor： Shan ZHU ,  Ting GUAN ,  Fei WU

IPC: H01M4/66 ,  H01M10/0525 ,  H01M4/62

Abstract: An electrochemical apparatus includes an electrode plate including a current collector, a first coating layer, and a second coating layer. The first coating layer is provided between the current collector and the second coating layer. The second coating layer includes a first active material. R2*d/D

公开(公告)号：US20210391742A1

公开(公告)日：2021-12-16

申请号：US17281355

申请日：2019-10-21

Applicant: Ningde Amperex Technology Limited

Inventor： Ting GUAN ,  Shan ZHU ,  Fei WU

IPC: H02J7/00 ,  H01M10/44 ,  H01M10/48

Abstract: A method of charging a battery, including: in an mth charge and discharge cycle, constant-current charging a battery to a first cut-off voltage Um at a charging current, where m is any two or more integers of 1, 2, 3, . . . , x, and Um has different values in at least two charge and discharge cycles. The method shortens fully charged time of a battery and further ensure that phenomena of lithium precipitation and overcharge do not occur on the battery, thereby prolonging a service life of the battery.

公开(公告)号：US20190178950A1

公开(公告)日：2019-06-13

申请号：US16214746

申请日：2018-12-10

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Fei WU ,  Juan JIN ,  Kefei WANG

IPC: G01R31/389 ,  G01R31/3842 ,  G01R31/367

Abstract: The present disclosure relates to the field of battery state monitoring technologies, and in particular, to a battery state monitoring method and apparatus. The method is: monitoring a voltage value and a current value of an output end of a battery; determining a battery impedance value based on the voltage value; calculating an impedance voltage-drop value based on the current value and the battery impedance value; calculating an open circuit voltage of the battery based on the voltage value and the impedance voltage-drop value; when a difference of the open circuit voltage between two consecutive calculations is greater than or equal to a threshold, judging that the battery state is abnormal; and when the difference of the open circuit voltage between two consecutive calculations is determined to be lower than the threshold, updating the battery impedance value based on the voltage value and the current value. By using the foregoing method, the battery state is judged by verifying a relationship between a set threshold and a difference of the open circuit voltage between two consecutive calculations, thereby improving the accuracy of battery safety judgment. A possibility of a safety accident occurring in a battery can be predicted, thereby reducing or avoiding a risk of fire outbreak of a device caused due to a battery safety fault of the device.

公开(公告)号：US20170361570A1

公开(公告)日：2017-12-21

申请号：US15598492

申请日：2017-05-18

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Jibin GENG ,  Fei WU ,  Liangzhen XIAO ,  Wei LU

IPC: B32B7/12 ,  B32B3/30

CPC classification number: B32B7/12 ,  B32B3/30 ,  B32B2307/748 ,  B32B2405/00

Abstract: A drawable adhesive tape and a drawable adhesive tape product. The drawable adhesive tape includes: a base framework extending along length direction of the drawable adhesive tape and having a plurality of adhesive-accommodating regions which extend along both thickness direction of the drawable adhesive tape toward interior of the base framework and length direction of the drawable adhesive tape and which are arranged at intervals along width direction of the drawable adhesive tape, and an adhesive layer filled in the adhesive-accommodating regions. The drawable adhesive tape product includes a release paper and the drawable adhesive tape, in which, a surface of the drawable adhesive tape where the adhesive-accommodating regions are located is covered by an oily surface of the release paper. The drawable adhesive tape and drawable adhesive tape product have improved tensile strength and improved adhesion strength.