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：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

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：US20230216089A1

公开(公告)日：2023-07-06

申请号：US18155059

申请日：2023-01-16

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M10/0569 ,  H01M4/587 ,  H01M4/36 ,  H01M4/38 ,  H01M4/133

CPC classification number: H01M10/0569 ,  H01M4/587 ,  H01M4/364 ,  H01M4/386 ,  H01M4/133 ,  H01M2300/004 ,  H01M2004/027

Abstract: A secondary battery, and a battery module, a battery pack, and an electric apparatus containing the same are provided. The secondary battery includes: an electrolyte having a specific percentage of a low-viscosity solvent, a specific percentage of a high-dielectric-constant solvent, and a negative electrode having a negative electrode active material layer, and the secondary battery satisfies the relational expression:





1
×

10

-
4


⁢
4

≤


B
×
C
×
P



 
OI

×
CW


≤

1
×

10

-
3







where B is the percentage of the low-viscosity solvent in total solvent in the electrolyte by mass; C is a percentage of an electrolyte salt in the electrolyte by mass; P is a porosity of the negative electrode active material layer; CW is a coating weight of the negative electrode active material layer, measured in mg/cm2; and OI is an orientation index of the negative electrode active material layer.

公开(公告)号：US20240204255A1

公开(公告)日：2024-06-20

申请号：US18407482

申请日：2024-01-09

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jingxuan Sun ,  Qian Liu ,  Quanguo Li ,  Zeli Wu ,  Yiming Qin ,  Jiahua Chen ,  Dejun Xiao

IPC: H01M10/0568 ,  C07F5/04 ,  C07F7/04

CPC classification number: H01M10/0568 ,  C07F5/04 ,  C07F7/04 ,  H01M2300/0037

Abstract: The present application relates to an ionic compound, an electrolyte solution, a secondary battery and an electrical apparatus, wherein the ionic compound is represented by formula (1); wherein each R1 is independently selected from alkyl having 1-10 carbon atoms substituted with fluorine or aryl having 6-30 carbon atoms substituted with fluorine, respectively; wherein any two adjacent —OR1 groups and A− can form a ring through the carbon atom in each R1 as a site of attachment; A− represents B− or Si−, and Y+ represents a sodium ion or a potassium ion. The ionic compound can improve the cycling performance of secondary batteries such as sodium-ion batteries and potassium-ion batteries.

公开(公告)号：US20240178448A1

公开(公告)日：2024-05-30

申请号：US18429431

申请日：2024-02-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xihui Wang ,  Wenzhu Xu ,  Zeli Wu ,  Canlong Wu ,  Di Liu ,  Qifan Zou

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

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569 ,  H01M2300/0037

Abstract: The embodiments of the present application provide an electrolyte solution and a lithium-ion battery comprising the same. The electrolyte solution includes a solvent, a lithium salt and a first additive, and the first additive has a molecular formula of




wherein R is at least one of an H element, a halogen element or an alkyl group having 1 to 3 carbon atoms. The electrolyte solution provided in the embodiments of the present application has the advantages of having a long shelf life, avoiding the problem of the performance decline of lithium-ion batteries due to deterioration of electrolyte solutions, being capable of inhibiting an increase of internal resistance of the lithium-ion batteries in low-temperature cycles, and improving the performance of the lithium-ion batteries.

公开(公告)号：US11961961B2

公开(公告)日：2024-04-16

申请号：US17730247

申请日：2022-04-27

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Changlong Han ,  Zeli Wu ,  Chenghua Fu

IPC: H01M10/0525 ,  H01M4/04 ,  H01M4/36 ,  H01M4/525 ,  H01M4/583 ,  H01M10/0567 ,  H01M4/02

CPC classification number: H01M10/0525 ,  H01M4/0404 ,  H01M4/366 ,  H01M4/525 ,  H01M4/583 ,  H01M10/0567 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/30 ,  H01M2300/002

Abstract: The present application provides a secondary battery and an apparatus containing the same. The secondary battery includes: a negative electrode plate including a negative electrode current collector and a negative electrode film disposed on at least one surface of the negative electrode current collector, the negative electrode film including a negative active material; and an electrolyte including an electrolyte salt, an organic solvent, and an additive; wherein the negative active material includes a silicon-based material; the additive includes an additive A and an additive B; the additive A is selected from one or more of the compounds shown in Formula 1; the additive B is selected from one or more in the compound shown in Formula 2; the additive B has melting point of below or equal to 5° C.