公开(公告)号：US20240079651A1

公开(公告)日：2024-03-07

申请号：US18503190

申请日：2023-11-07

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zeli Wu ,  Bin Jiang ,  Changlong Han ,  Huiling Chen ,  Lei Huang ,  Cuiping Zhang ,  Jie Guo ,  Wenhao Liu

IPC: H01M10/0567 ,  H01M10/052 ,  H01M10/0568 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M10/052 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2004/027

Abstract: Provided are a non-aqueous electrolyte and a preparation method thereof, and a secondary battery and an electric apparatus containing the same. The non-aqueous electrolyte contains a non-aqueous solvent and lithium ions, first cations, and first anions dissolved therein, where the first cation is a metal cation Men+ other than the lithium ion, n representing a chemical valence of the metal cation; the first anion is a difluoroxalate borate anion DFOB−; mass concentration of the first cations in the non-aqueous electrolyte is D1 ppm, and mass concentration of the first anions in the non-aqueous electrolyte is D2 ppm, both based on total mass of the non-aqueous electrolyte; and the non-aqueous electrolyte satisfies that D1 is 0.5 to 870 and that D1/D2 is 0.02 to 2. The non-aqueous electrolyte in this application enables the secondary battery to have good cycling performance, safety performance, and kinetic performance.

公开(公告)号：US20240047732A1

公开(公告)日：2024-02-08

申请号：US18482881

申请日：2023-10-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zeli Wu ,  Changlong Han ,  Cuiping Zhang ,  Lei Huang ,  Jie Guo

IPC: H01M10/0525 ,  H01M10/04 ,  H01M4/88 ,  H01M50/204

CPC classification number: H01M10/0525 ,  H01M10/0459 ,  H01M4/8875 ,  H01M50/204 ,  H01M2300/0028

Abstract: Provided are a lithium-ion battery, a battery module, a battery pack, and an electrical apparatus. The lithium-ion battery provided in the present application comprises one or more of additives shown in formula (I) in its electrolyte solution, and a ratio of a percentage mass content W0 of the additives shown in formula (I) in the electrolyte solution to a specific surface area X1 of a negative electrode active material in the negative electrode active material layer of the lithium-ion battery satisfies W0/X1=0.1−10. The additives shown in formula (I) are first reduced to a film on a surface of a negative electrode of the lithium-ion battery.

公开(公告)号：US11831002B2

公开(公告)日：2023-11-28

申请号：US18314120

申请日：2023-05-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Cuiping Zhang ,  Changlong Han ,  Zeli Wu ,  Lei Huang

IPC: H01M4/04 ,  H01M50/46 ,  H01M50/204 ,  H01M4/66 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M4/02

CPC classification number: H01M4/0404 ,  H01M4/661 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M50/204 ,  H01M50/46 ,  H01M2004/021

Abstract: A secondary battery, including a positive electrode, a negative electrode, a separator sandwiched between the positive electrode and the negative electrode, and an electrolyte are provided. In some embodiments, the positive electrode includes a positive electrode current collector having two main surfaces, the negative electrode includes a negative electrode current collector having two main surfaces, and at least one of the positive electrode current collector and the negative electrode current collector includes at least one recess structure extending from at least one main surface into interior of the current collector, where the recess structure has a recess depth h1 in microns, the electrolyte has a conductivity σ in Siemens/meter, and numerically, σ and h1 satisfy the following relationship: 8tanhh1+0.2h1≤σ≤10tanh(h1)2+2+0.1h1. This application further provides a battery module including the foregoing secondary battery, a battery pack, and an electric apparatus.

公开(公告)号：US11677074B2

公开(公告)日：2023-06-13

申请号：US17389480

申请日：2021-07-30

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhiqiang Li ,  Changlong Han ,  Qifeng Li

IPC: H01M4/505 ,  H01M4/04 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/505 ,  H01M4/0404 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/364 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: The present application discloses a positive electrode plate, a method for preparation thereof, and related lithium-ion secondary battery, electric vehicle and electronic product. The positive electrode plate includes a positive electrode current collector and a positive electrode film disposed on at least one surface of the positive electrode current collector, the positive electrode film includes a positive active material which is a lithium manganese-based positive active material; and wherein the volume resistivity ρsum of the positive electrode plate, the powder volume resistivity ρ of the positive active material under a pressure of 20 MPa and the mass percentage a of the positive active material in the positive electrode film satisfy ρsum/ρ97.5-a≤3.

公开(公告)号：US11581579B2

公开(公告)日：2023-02-14

申请号：US17052811

申请日：2019-08-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhiqiang Li ,  Changlong Han

IPC: H01M10/0567 ,  H01M10/0568 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M4/02

Abstract: The present application discloses a lithium ion secondary battery comprising a positive electrode plate, a negative electrode plate, a separator and an electrolyte, wherein the positive electrode plate comprises a positive electrode current collector and a positive electrode film provided on at least one surface of the positive electrode current collector, and the positive electrode film comprises a first positive electrode active material represented by chemical formula Li1+xNiaCobMe1-a-bO2-yAy and a second positive electrode active material represented by chemical formula Li1+zMncN2-cO4-dBd; the positive electrode plate has a resistivity r of 3500 Ω·m or less; and the electrolyte comprises a fluorine-containing lithium salt type additive. The lithium ion secondary battery provided by the present application is capable of satisfying high safety performance, high-temperature storage performance and cycle performance simultaneously.

公开(公告)号：US11121369B2

公开(公告)日：2021-09-14

申请号：US17051462

申请日：2019-08-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhiqiang Li ,  Changlong Han ,  Qifeng Li

IPC: H01M4/505 ,  H01M4/131 ,  H01M4/525 ,  H01M4/1391 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/02

Abstract: The present application discloses a positive electrode plate, a preparation method thereof, and a lithium-ion secondary battery, wherein the positive electrode plate includes a positive electrode current collector and a positive electrode film disposed on at least one surface of the positive electrode current collector, wherein the positive electrode film includes a positive active material which is a lithium manganese-based positive active material; and wherein the volume resistivity ρsum of the positive electrode plate, the powder volume resistivity ρ of the positive active material under a pressure of 20 MPa and the mass percentage a of the positive active material in the positive electrode film satisfy ρsum/ρ97.5-a≤3. The positive electrode plate provided in the present application enables the lithium-ion secondary battery to simultaneously have higher safety performance, rate performance and cycle performance.

公开(公告)号：US10797348B2

公开(公告)日：2020-10-06

申请号：US15845950

申请日：2017-12-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jiqiong Liu ,  Changlong Han ,  Jianwei Zhu ,  Xiaochong Zhou ,  Feng Huan

IPC: H01M10/0567 ,  H01M10/0568 ,  H01M10/0525

Abstract: The present disclosure provides an electrolyte and a lithium-ion battery. The electrolyte comprises: an organic solvent; a lithium salt dissolved in the organic solvent; and an additive. The additive comprises trifluoromethanesulfonate silyl compound, lithium fluorophosphate compound and cyclic phosphonitrile compound. The electrolyte of the present disclosure can significantly decrease the low temperature resistance of the lithium-ion battery, and improve the power performance of the lithium-ion battery, and the electrolyte of present disclosure can also significantly inhibit the gas generation during the cycle process and the storage process of the lithium-ion battery, and significantly improve the cycle performance, the high temperature storage performance and the safety performance of the lithium-ion battery.

公开(公告)号：US20180241078A1

公开(公告)日：2018-08-23

申请号：US15896103

申请日：2018-02-14

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Ming Zhang ,  Changlong Han ,  Hao Zhang ,  Cuiping Zhang

IPC: H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  C07F9/659 ,  C07F7/18

CPC classification number: H01M10/0525 ,  C07F7/18 ,  C07F9/659 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2300/002 ,  H01M2300/0025 ,  Y02T10/7011

Abstract: The present invention provides a lithium ion battery and an electrolyte thereof. The electrolyte for the lithium ion battery includes a non-aqueous organic solvent, a lithium salt and additives, wherein the additives include additive A cyclophosphazene compound, additive B lithium fluorophosphate compound, and additive C selected from at least one of silane phosphate compound, silane phosphite compound and silane borate compound. Compared with conventional technologies, the nickel-rich positive electrode lithium ion battery using the electrolyte of the present invention has a desirable cyclic capacity retention rate, a desirable storage capacity retention rate and a low gas production at high temperature, and has a low DC internal resistance at low temperature, which can remarkably improve the thermal stability of lithium ion battery.

公开(公告)号：US20180191032A1

公开(公告)日：2018-07-05

申请号：US15845950

申请日：2017-12-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jiqiong Liu ,  Changlong Han ,  Jianwei Zhu ,  Xiaochong Zhou ,  Feng Huan

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M2300/0025

Abstract: The present disclosure provides an electrolyte and a lithium-ion battery. The electrolyte comprises: an organic solvent; a lithium salt dissolved in the organic solvent; and an additive. The additive comprises trifluoromethanesulfonate silyl compound, lithium fluorophosphate compound and cyclic phosphonitrile compound. The electrolyte of the present disclosure can significantly decrease the low temperature resistance of the lithium-ion battery, and improve the power performance of the lithium-ion battery, and the electrolyte of present disclosure can also significantly inhibit the gas generation during the cycle process and the storage process of the lithium-ion battery, and significantly improve the cycle performance, the high temperature storage performance and the safety performance of the lithium-ion battery.

公开(公告)号：US20240396036A1

公开(公告)日：2024-11-28

申请号：US18789723

申请日：2024-07-31

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jie Guo ,  Zeli Wu ,  Changlong Han ,  Guan Wang ,  Bin Jiang

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/133 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569

Abstract: The present application provides a secondary battery, a battery module, a battery pack, and an electrical device. The secondary battery includes a positive electrode plate and an electrolytic solution; the positive electrode plate including a positive electrode active material; the electrolytic solution includes a boron-containing salt; a mass percentage of the boron-containing salt based on the total mass of the electrolytic solution is denoted as A %; an upper-limit potential of the positive electrode active material with respect to lithium metal is denoted as V1 (V); and the secondary battery satisfies: 0 4.1; optionally, 0