公开(公告)号：US11444333B2

公开(公告)日：2022-09-13

申请号：US16423389

申请日：2019-05-28

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Qiang Zheng ,  Zhanzhao Fang ,  Qi Dang

IPC: H01M10/0587 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/66 ,  H01M4/70

Abstract: The present application relates to an electrochemical device. Specifically, the present application provides an electrochemical device, including a cell and a shell enclosing the cell; the cell includes a jelly roll including a first electrode and a second electrode spaced from each other, a separator is disposed between the first electrode and the second electrode, the first electrode and the second electrode are wound to form the cell; the first electrode includes a first current collector, the first current collector includes a first surface and a second surface disposed oppositely; the first surface faces the shell, and includes a coated region coated with a first active material and an uncoated region; the uncoated region includes a first uncoated region disposed at an end of the jelly roll, and the first uncoated region includes alternating bent portions and straight portions; and the bent portions are provided with an insulating layer.

公开(公告)号：US10164456B2

公开(公告)日：2018-12-25

申请号：US15439867

申请日：2017-02-22

Applicant: Dongguan Amperex Technology Limited ,  Ningde Amperex Technology Limited

Inventor： Fuping Luo ,  Shengwei Wang ,  Chao Gao ,  Qiang Zheng

IPC: H02J7/00 ,  H01M10/44 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58

Abstract: A method for charging a lithium ion battery includes the steps of: 1) determining a maximum charging current I0 and a lowest anode potential η of the lithium ion battery at which no lithium precipitation occurs; 2) charging the lithium ion battery at a constant current of I1 which is greater than I0 for a charging time t1; 3) discharging the lithium ion battery at a constant current of I2 which is less than I0 for a discharging time t2, 5≤t1/t2≤50; 4) repeating steps 2) and 3) until a cutoff voltage of the lithium ion battery reaches V0 and standing the lithium ion battery for a standing time t3; and 5) charging the lithium ion battery at a constant current of I0 until the cutoff voltage of the lithium ion battery reaches V0 and charging the lithium ion battery to a cutoff current of I3 at a constant voltage.

公开(公告)号：US20160301076A1

公开(公告)日：2016-10-13

申请号：US15092572

申请日：2016-04-06

Applicant: Ningde Amperex Technology Limited ,  Dongguan Amperex Technology Limited

Inventor： Hongguang SHEN ,  Fuping Luo ,  Chao Gao ,  Qiang Zheng ,  Shengwei Wang

IPC: H01M4/62 ,  C08F20/14 ,  C08F20/18 ,  H01M10/0525

CPC classification number: H01M4/622 ,  C08F2/26 ,  C08F2222/165 ,  H01M10/0525 ,  H01M2220/20 ,  Y02E60/122 ,  C08F220/14 ,  C08F2220/1825 ,  C08F220/06 ,  C08F212/08

Abstract: The present application discloses a binder for a lithium ion battery, which comprises a polymer obtained through emulsion polymerization of a monomer in the presence of a reactive emulsifying agent. The binder is used in fabrication of a lithium ion electrode plate, whereby a thin film formed on the surface of an electrode membrane and fine channels formed in the electrode membrane with the use of a conventional emulsifying agent during the electrode membrane-forming process are eliminated, and the lithium ion conductivity of the electrode membrane is improved. Meanwhile, with the use of the reactive emulsifying agent, the bonding effect of the binder and the stability of the electrode membrane are improved, thereby greatly improving the charging rate and cycle life of the lithium ion battery.

Abstract translation: 本申请公开了一种用于锂离子电池的粘合剂，其包含通过在反应性乳化剂存在下通过单体的乳液聚合获得的聚合物。 粘合剂用于制造锂离子电极板，消除了在电极膜形成过程中使用常规乳化剂在电极膜表面形成的薄膜和在电极膜中形成的细小通道的薄膜 ，电极膜的锂离子传导性提高。 同时，通过使用反应性乳化剂，粘合剂的粘合效果和电极膜的稳定性提高，极大地提高了锂离子电池的充电率和循环寿命。

公开(公告)号：US12166213B2

公开(公告)日：2024-12-10

申请号：US16365449

申请日：2019-03-26

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Qiang Zheng ,  Qi Dang ,  Zhanzhao Fang ,  Qiang Tao

IPC: H01M4/66 ,  H01M10/0587 ,  H01M50/449 ,  H01M50/534 ,  H01M50/536

Abstract: The present application relates to an electrode sheet, a battery cell and a battery. The electrode sheet includes a current collector and a protective layer. The current collector includes a coated region provided with an active material layer and an uncoated region without being provided with the active material layer. The protective layer is provided on at least a part of a surface of the uncoated region, and has a porosity of 0% to 95%. For the electrode sheet according to the present application, by providing the current collector with the protective layer, the contact resistance may be increased when the electrode sheet is short-circuited, and the discharge power and the thermal runaway probability of the battery cell may be reduced when the battery cell is internally short-circuited, thereby improving the safety performance of the battery cell.

公开(公告)号：US11056900B2

公开(公告)日：2021-07-06

申请号：US16261187

申请日：2019-01-29

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Qi Dang ,  Chao Gao ,  Qiang Zheng ,  Zhanzhao Fang

IPC: H02J7/00

Abstract: A charging method is proposed to include the steps of: in a first stage of charging, charging a battery with a first-stage current until a voltage of the battery reaches a first-stage voltage value; and in a second stage of charging, charging the battery with a second-stage current until the voltage of the battery reaches a second-stage voltage value which is greater than the first-stage voltage value. The second-stage current is smaller than the first-stage current.

公开(公告)号：US12057563B2

公开(公告)日：2024-08-06

申请号：US16828742

申请日：2020-03-24

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Zhenghuang Cai ,  Hai Long ,  Qiang Zheng

IPC: H01M4/04 ,  H01M4/66 ,  H01M4/70 ,  H01M10/04 ,  H01M50/46 ,  H01M50/533 ,  H01M50/538

CPC classification number: H01M4/0404 ,  H01M4/66 ,  H01M4/70 ,  H01M10/0431 ,  H01M50/46 ,  H01M50/533 ,  H01M50/538

Abstract: An electrode sheet has a first end and a second end opposite each other, and includes a current collector, active materials disposed on a first coated zone and a second coated zone, and a plurality of electrode tabs. The current collector includes a side edge, opposing first and second surfaces. The first surface includes a first coated zone and a first uncoated zone, and the second surface includes a second coated zone. At the first end, the first coated zone and the second coated zone are flush. At the second end, the first coated zone is misaligned with the second coated zone. The sum of the length of the first coated zone and the length of the first uncoated zone is equal to the length of the second coated zone. Each electrode tab is coupled to the current collector and protrudes beyond the side edge.

公开(公告)号：US11978862B2

公开(公告)日：2024-05-07

申请号：US17874615

申请日：2022-07-27

Applicant: Ningde Amperex Technology Limited

Inventor： Qiang Zheng ,  Zhanzhao Fang ,  Qi Dang

IPC: H01M10/0587 ,  H01M4/36 ,  H01M4/66 ,  H01M4/70 ,  H01M10/0525

CPC classification number: H01M10/0587 ,  H01M4/366 ,  H01M4/667 ,  H01M4/70 ,  H01M10/0525

Abstract: An electrochemical device, including a cell and a shell enclosing the cell; the cell includes a jelly roll including a first electrode and a second electrode spaced from each other, a separator is disposed between the first electrode and the second electrode, the first electrode and the second electrode are wound to form the cell; the first electrode includes a first current collector, the first current collector includes a first surface and a second surface disposed oppositely; the first surface faces the shell, and includes a coated region coated with a first active material and an uncoated region; the uncoated region includes a first uncoated region disposed at an end of the jelly roll, and the first uncoated region includes alternating bent portions and straight portions; and the bent portions are provided with an insulating layer.

公开(公告)号：US11695160B2

公开(公告)日：2023-07-04

申请号：US16254865

申请日：2019-01-23

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Qiang Tao ,  Chao Gao ,  Qiang Zheng ,  Zhanzhao Fang

IPC: H01M10/05 ,  H01M4/04 ,  H01M4/13 ,  H01M10/0587 ,  H01M4/131 ,  H01M4/1391 ,  H01M10/0525

CPC classification number: H01M10/0587 ,  H01M4/0404 ,  H01M4/131 ,  H01M4/1391 ,  H01M10/0525

Abstract: The present application relates to an electrochemical device. Specifically, the present application provides a cell, wherein the cell is formed by winding or stacking a first electrode and a second electrode which are arranged at an interval, and a separator is disposed between the first electrode and the second electrode. Wherein the first electrode includes a first current collector, and the first current collector includes a coated region coated with a first active material and an uncoated region without the first active material; the uncoated region is at least partially provided with an insulating layer. The adhesion between the insulating layer and the first current collector is not less than about 0.5 N/m. The electrochemical device provided by the present application has improved safety performance.

公开(公告)号：US10135279B2

公开(公告)日：2018-11-20

申请号：US15626951

申请日：2017-06-19

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Fuping Luo ,  Yu Luo ,  Shengwei Wang ,  Zhanzhao Fang ,  Chao Gao ,  Qiang Zheng

IPC: H02J7/00 ,  H01M10/0525 ,  H01M10/44

Abstract: Embodiments of the present application provide a method of battery charging, which relates to the field of battery charging and is capable of effectively improving safety performance of the battery. The method includes: obtaining an anode open circuit voltage curve, an anode impedance curve, a lithium deposition potential threshold and a state of charge, corresponding to a battery; determining a current anode open circuit voltage according to the anode open circuit voltage curve and the state of charge; determining a current anode impedance according to the anode impedance curve and the state of charge; determining a current charging current according to the current anode open circuit voltage, the current anode impedance and the lithium deposition potential threshold; and charging the battery according to the current charging current. Embodiments of the present application are applicable to a rapid battery charging process.

公开(公告)号：US20170244255A1

公开(公告)日：2017-08-24

申请号：US15439867

申请日：2017-02-22

Applicant: Dongguan Amperex Technology Limited ,  Ningde Amperex Technology Limited

Inventor： Fuping Luo ,  Shengwei Wang ,  Chao Gao ,  Qiang Zheng

IPC: H02J7/00 ,  H01M10/0525 ,  H01M10/44

CPC classification number: H02J7/007 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/44 ,  H02J7/008 ,  Y02T10/7011

Abstract: A method for charging a lithium ion battery includes the steps of: 1) determining a maximum charging current I0 and a lowest anode potential η of the lithium ion battery at which no lithium precipitation occurs; 2) charging the lithium ion battery at a constant current of I1 which is greater than I0 for a charging time t1; 3) discharging the lithium ion battery at a constant current of I2 which is less than I0 for a discharging time t2, 5≦t1/t2≦50; 4) repeating steps 2) and 3) until a cutoff voltage of the lithium ion battery reaches V0 and standing the lithium ion battery for a standing time t3; and 5) charging the lithium ion battery at a constant current of I0 until the cutoff voltage of the lithium ion battery reaches V0 and charging the lithium ion battery to a cutoff current of I3 at a constant voltage.