公开(公告)号：US20210028489A1

公开(公告)日：2021-01-28

申请号：US17064782

申请日：2020-10-07

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

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

IPC: H01M10/0566 ,  H01M10/0525

Abstract: An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the content X of the nitrile compound and the content Y of the trinitrile compound meet the conditions represented by Formula (1) and Formula (2): {about 2 wt %≤(X+Y)≤about 11 wt % . . . (1), about 0.1≤(X/Y)≤about 8 . . . (2)}. The electrolyte further includes at least one selected from the group consisting of a cyclic carbonate ester having a carbon-carbon double bond, a fluorinated chain carbonate ester, a fluorinated cyclic carbonate ester, and a compound having a sulfur-oxygen double bond. 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：US20200099098A1

公开(公告)日：2020-03-26

申请号：US16211853

申请日：2018-12-06

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

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

IPC: H01M10/0566 ,  H01M10/0525

Abstract: The present application relates to an electrolyte and an electrochemical device comprising the electrolyte. The electrolyte comprises a dinitrile compound, a trinitrile compound, and propyl propionate, wherein, based on the total weight of the electrolyte, the content X of the nitrile compound and the content Y of the trinitrile compound meet the conditions represented by Formula (1) and Formula (2): {about 2 wt %≤(X+Y)≤about 11 wt % . . . (1), about 0.1≤(X/Y)≤about 8 . . . (2)}. The electrolyte of the present application 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：US20180083319A1

公开(公告)日：2018-03-22

申请号：US15649820

申请日：2017-07-14

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Liangzhen XIAO ,  Qiao ZENG ,  Kefei WANG

IPC: H01M10/0587 ,  H01M10/28 ,  H01M10/0525 ,  H01M10/04 ,  H01M10/14 ,  H01M10/12

CPC classification number: H01M10/0587 ,  H01M10/0431 ,  H01M10/0459 ,  H01M10/0525 ,  H01M10/125 ,  H01M10/14 ,  H01M10/286

Abstract: Provided is a wound cell, formed by winding of a first and second separator, a first and second electrode plate from start ends thereof, outermost circle of second electrode plate includes second single-side coated area, surface of which facing center of the wound cell is second blank current collector area not coated with second active material, portion of first electrode plate opposite to second blank current collector area includes first single-side coated area, surface of which away from the center of the wound cell is first blank current collector area not coated with first active material; tail end of first electrode plate contains first blank foil area, portion of second electrode plate opposite to first blank foil area contains second blank foil area; start ends of first and second single-side coated area are located at two opposite sides in thickness direction of the cell.

公开(公告)号：US20170288274A1

公开(公告)日：2017-10-05

申请号：US15457778

申请日：2017-03-13

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Qiao ZENG ,  Kefei WANG ,  Jiacai CAI ,  Yu LUO

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

CPC classification number: H01M10/0587 ,  H01M2/263 ,  H01M10/0409 ,  H01M10/0431 ,  H01M10/0525

Abstract: The present disclosure provides a wound-type cell and a winding mandrel. The wound-type cell comprises: a first electrode plate having a blank first current collector which is positioned at a first winding start end and is not coated with the first active material layer; a second electrode plate having a blank second current collector which is positioned at a second winding start end and is not coated with the second active material layer, and the blank second current collector is positioned at an inner side of the blank first current collector; a separator; a first electrode tab; and a second electrode tab. A first end of the blank first current collector is beyond a second end of the blank second current collector in a length direction, and a position of the first electrode tab is beyond the second end of the blank second current collector in the length direction.