公开(公告)号：US20230299356A1

公开(公告)日：2023-09-21

申请号：US18321794

申请日：2023-05-23

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zeli Wu ,  Changlong Han ,  Lei Huang ,  Zhiyong Ai

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569 ,  H01M2220/20 ,  H01M2300/0042 ,  H01M2300/0051

Abstract: A method for preparing an SEI (solid electrolyte interphase)-like film component additive, and an electrolyte solution comprising the SEI-like film component additive prepared by the method are provided. Compared with a conventional electrolyte solution (electrolyte solution without adding SEI-like film component additive), the electrolyte solution of the present application can prevent the loss of the effective ingredients caused by the dissolution of the SEI film on the negative electrode in the electrolyte solution during battery storage and use, and the electrolyte solution of the present application can also timely supplement the lost or damaged SEI film with effective ingredients, so that the damaged parts of the SEI film are quickly and timely supplemented.

公开(公告)号：US20230275204A1

公开(公告)日：2023-08-31

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 ,  H01M50/204 ,  H01M50/46 ,  H01M4/66 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0567

CPC classification number: H01M4/0404 ,  H01M50/204 ,  H01M50/46 ,  H01M4/661 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0567 ,  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：US20240266606A1

公开(公告)日：2024-08-08

申请号：US18599285

申请日：2024-03-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M10/0567 ,  H01M10/0525

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

Abstract: Provided are a lithium-ion battery, including a positive electrode sheet, a negative electrode sheet, a separator, and an electrolyte, wherein in the battery, a ratio of a negative electrode capacity to a positive electrode capacity is a, and the electrolyte includes thiourea compounds in an amount of b weight % based on the total weight of the electrolyte, wherein the lithium-ion battery meets the following relationship: a

公开(公告)号：US20240170652A1

公开(公告)日：2024-05-23

申请号：US18408597

申请日：2024-01-10

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M4/36 ,  C01G53/00 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/366 ,  C01G53/50 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2004/84 ,  H01M2004/028

Abstract: This application provides a positive electrode active material. Surface of a first lithium salt is coated with a coating layer containing a second lithium salt, which not only blocks the corrosive decomposition of the first lithium salt by the electrolyte but also allows the second lithium salt to form CEI films in situ on surfaces of the first lithium salt particles, thereby improving the film structure and avoiding the decomposition of active components in the electrolyte. Additionally, the second lithium salt contains both elements fluorine and phosphorus, which makes the composition of the film formed as consistent as possible with the composition of the film formed by lithium hexafluorophosphate in the electrolyte, thereby reducing the consumption of active lithium in the electrolyte. The positive electrode active material of this application can significantly improve the power performance and cycle life of batteries.

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：US20230387469A1

公开(公告)日：2023-11-30

申请号：US18317094

申请日：2023-05-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/58 ,  H01M4/04 ,  H01M50/204

CPC classification number: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/5825 ,  H01M4/0404 ,  H01M50/204 ,  H01M2220/20 ,  H01M2004/028

Abstract: A secondary battery and a battery module, a battery pack, and an electric apparatus containing the secondary battery are provided. The secondary battery includes a positive electrode plate and an electrolyte. The positive electrode plate includes a positive electrode current collector and a positive electrode film layer arranged on at least one surface of the positive electrode current collector, and the positive electrode film layer includes one or more of olivine-structured lithium-containing phosphate and its modified compound. The electrolyte includes an organic solvent, and the organic solvent includes a first solvent represented by Formula 1. R11 and R12 in Formula 1 each are independently one of C1-C4 alkyl and C1-C4 haloalkyl. The secondary battery satisfies: mass of first solvent/rated capacity of secondary battery is ≥0.7 g/Ah; and mass of electrolyte/rated capacity of secondary battery is ≤3.5 g/Ah.

公开(公告)号：US20240372145A1

公开(公告)日：2024-11-07

申请号：US18773617

申请日：2024-07-16

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  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, a negative electrode plate comprising a negative electrode active material; and an electrolytic solution including a first additive and a carbonate solvent, and the first additive including a boron-containing lithium salt and an ester additive, which are configured to form a solid electrolyte interface film on the surface of the negative electrode active material, wherein a discharge capacity of the secondary battery is denoted as B1 in Ah, a change in amount of gas production of the secondary battery is denoted as B2 in mL, a mass of the electrolytic solution is denoted as C in g, a reduction potential of the first additive relative to lithium metal is denoted as D.

公开(公告)号：US20240347771A1

公开(公告)日：2024-10-17

申请号：US18675164

申请日：2024-05-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M10/0567 ,  C01B35/12 ,  C01G45/12 ,  C01G53/00 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/42

CPC classification number: H01M10/0567 ,  C01B35/121 ,  C01G45/1228 ,  C01G53/50 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/4235 ,  C01P2002/50 ,  C01P2006/40 ,  H01M2004/028 ,  H01M2220/20 ,  H01M2300/0025

Abstract: Provided is a secondary battery. The secondary battery includes a positive electrode containing a positive electrode active material, a negative electrode, an electrolyte, and a separator, where the positive electrode active material contains a transition metal element, and a molar ratio of Mn in the transition metal element, r(Mn), satisfies 0.3≤r(Mn)≤1; and the electrolyte contains an additive selected from at least one of a compound, a compound, and a compound capable of complexing manganese ions, and a compound serving as a lithium salt. A total mass percentage of the compound, compound, and compound in the electrolyte is W1%, where W1% is 0.1% to 5%; a molar ratio C1 (mol/L) of the compound in the electrolyte satisfies 0.2≤C1≤1.5; and r(Mn), C1 and W1% satisfy the following relation: 13≤(100W1%+12C1)/r(Mn)≤20.