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公开(公告)号：US20230207966A1
公开(公告)日：2023-06-29
申请号：US17911883
申请日：2020-03-18
Applicant: Ningde Amperex Technology Limited
Inventor： Ao Liu , Chao Gao , Zhanzhao Fang
IPC: H01M50/46 , H01M10/0525 , H01M50/489 , H01M4/505 , H01M4/525 , H01M50/451
CPC classification number: H01M50/461 , H01M10/0525 , H01M50/489 , H01M4/505 , H01M4/525 , H01M50/451 , H01M2004/028
Abstract: An electrochemical device includes a positive electrode plate, a negative electrode plate, a separator, and an electrolytic solution. The positive electrode plate includes a positive active material having lithium transition metal oxide particles represented by a chemical formula LiaCoxM1yM2zO2, where 0.95≤a≤1.05, 0.05
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公开(公告)号：US10164456B2
公开(公告)日：2018-12-25
申请号：US15439867
申请日：2017-02-22
Inventor： Fuping Luo , Shengwei Wang , Chao Gao , Qiang Zheng
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.
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公开(公告)号：US20160301076A1
公开(公告)日：2016-10-13
申请号：US15092572
申请日：2016-04-06
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。
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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.
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公开(公告)号：US20210296919A1
公开(公告)日：2021-09-23
申请号：US17019660
申请日：2020-09-14
Applicant: Ningde Amperex Technology Limited
Inventor： Ao Liu , Meili Gong , Chao Gao , Zhanzhao Fang
Abstract: A method for improving cycling performance of a battery includes, in a first stage, charging the battery with a first-stage current until a voltage of the battery reaches a first-stage voltage value and in a second stage, charging the battery with a second-stage current until the voltage of the battery reaches a second-stage voltage value. The second-stage voltage value is greater than the first-stage voltage value, and the second-stage current is less than the first-stage current.
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Patent Agency Ranking
公开(公告)号：US09761881B2
公开(公告)日：2017-09-12
申请号：US15092572
申请日：2016-04-06
Inventor： Hongguang Shen , Fuping Luo , Chao Gao , Qiang Zheng , Shengwei Wang
IPC: H01M10/05 , H01M4/62 , C08F2/26 , H01M10/0525 , C08F222/16
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.
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公开(公告)号：US11843272B2
公开(公告)日：2023-12-12
申请号：US17019660
申请日：2020-09-14
Applicant: Ningde Amperex Technology Limited
Inventor： Ao Liu , Meili Gong , Chao Gao , Zhanzhao Fang
CPC classification number: H02J7/007182 , C09J7/29 , H01M10/44 , H01M10/46 , H01M50/449 , H01M50/461 , C09J2203/326 , C09J2409/00 , C09J2425/00 , C09J2427/00 , C09J2433/00 , H01M2220/30
Abstract: A method for improving cycling performance of a battery includes, in a first stage, charging the battery with a first-stage current until a voltage of the battery reaches a first-stage voltage value and in a second stage, charging the battery with a second-stage current until the voltage of the battery reaches a second-stage voltage value. The second-stage voltage value is greater than the first-stage voltage value, and the second-stage current is less than the first-stage current.
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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.
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公开(公告)号：US20190267609A1
公开(公告)日：2019-08-29
申请号：US16282281
申请日：2019-02-21
Applicant: Ningde Amperex Technology Limited
Inventor： Yajie Li , Changchuan Shi , Xinghua Tao , Zhanzhao Fang , Chao Gao
IPC: H01M4/13 , H01M10/0525
Abstract: An embodiment of the present application provides a negative electrode and a lithium ion battery including the negative electrode, the negative electrode includes a negative electrode current collector, and a negative electrode active material layer arranged on the negative electrode current collector, wherein the negative electrode active material layer includes a negative electrode active material and a dispersant, and the dispersant includes lithium carboxymethylcellulose, wherein the mass ratio of the negative electrode active material to the dispersant being ≥18.74. The present application greatly reduces the DC resistance of the lithium ion battery and the charge transfer resistance at the interface without losing the energy density of the lithium ion battery, without affecting the cycle life of the lithium ion battery or causing cyclic expansion, which avoids the lithium precipitation phenomenon of the lithium ion battery during the cycle of charge and discharge.
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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.
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