公开(公告)号：US20240322234A1

公开(公告)日：2024-09-26

申请号：US18731804

申请日：2024-06-03

Applicant: Ningde Amperex Technology Limited

Inventor： Jianyu LIU ,  Hai LONG ,  Chao TANG

IPC: H01M10/0566 ,  H01M10/0525

CPC classification number: H01M10/0566 ,  H01M10/0525 ,  H01M2300/0025

Abstract: An electrochemical device includes a positive electrode, a negative electrode, a separator, and an electrolyte solution. The electrolyte solution includes fluoroethylene carbonate and a trinitrile compound. Based on a mass of the electrolyte solution, a mass percent of the fluoroethylene carbonate is A %, satisfying: 4≤ A≤10, and a mass percent of the trinitrile compound is B %, satisfying: 1≤B≤3. A positive active material of a positive electrode includes a metal element M. The metal element M includes at least one of Ti, Mg, or Al. A content of the metal element M in the positive active material is C ppm. C and B satisfy: 7≤C×B/1000≤27.

公开(公告)号：US20240021878A1

公开(公告)日：2024-01-18

申请号：US18373983

申请日：2023-09-28

Applicant: Ningde Amperex Technology Limited

Inventor： Jianyu LIU ,  Wenqiang LI ,  Jianming ZHENG

IPC: H01M10/0568 ,  H01M10/0567 ,  H01M4/66 ,  H01M10/0525 ,  H01M10/42

CPC classification number: H01M10/0568 ,  H01M10/0567 ,  H01M4/661 ,  H01M10/0525 ,  H01M10/4235 ,  H01M2300/0037

Abstract: An electrolyte and an electrochemical apparatus containing the electrolyte. The electrolyte includes a fluorine-containing sulfonimide lithium salt and a trinitrile compound, where based on a weight of the electrolyte, a percentage of the fluorine-containing sulfonimide lithium salt is X %, and a percentage of the trinitrile compound is Y %, where 1≤X+Y≤6. The electrolyte in this application can significantly improve safety performance of lithium-ion batteries.

公开(公告)号：US20240332620A1

公开(公告)日：2024-10-03

申请号：US18621143

申请日：2024-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Shan ZHANG ,  Jianyu LIU ,  Lanjie JIANG ,  Chao TANG

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

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

Abstract: An electrochemical apparatus includes a positive electrode plate and an electrolyte. The positive electrode plate includes a positive electrode current collector and a positive electrode material layer disposed on at least one surface of the positive electrode current collector, the positive electrode material layer includes a positive electrode active material, and the positive electrode active material contains cobalt and nickel, where based on a mass of the positive electrode active material, a mass percentage of the nickel is B %, where 0.05≤B≤20. The electrolyte includes lithium bis(oxalato) borate and 1,3,6-hexanetricarbonitrile, where based on a mass of the electrolyte, a mass percentage of the lithium bis(oxalato) borate is C % and a mass percentage of the 1,3,6-hexanetricarbonitrile is D %. The electrochemical apparatus satisfies 0.1≤(C+D)/B≤23.

公开(公告)号：US20210408594A1

公开(公告)日：2021-12-30

申请号：US16962422

申请日：2020-02-14

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Jianyu LIU ,  Jianming ZHENG ,  Qian WEN ,  Wenqiang LI

IPC: H01M10/0567 ,  H01M10/42

Abstract: An electrolyte, including a fluorine-containing phosphate ester and a carboxylate ester, wherein the fluorine-containing phosphate ester is represented by Formula 1: R1, R2 and R3 are each independently selected from hydrogen, a C1-C10 alkyl group, C1-C10 alkoxy group, C1-C10 haloalkyl group, C1-C10 haloalkoxy group, C1-C10 phosphate ester group, or C1-C10 mono- or multiple-carbonate ester group, wherein at least one of R1, R2 and R3 comprises a fluorine atom. The weight ratio of the fluorine-containing phosphate ester to the carboxylate ester is 0.001-0.5.

公开(公告)号：US20240266607A1

公开(公告)日：2024-08-08

申请号：US18622242

申请日：2024-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Jianyu LIU ,  Chao TANG

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

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569 ,  H01M2300/004

Abstract: An electrochemical device includes a positive electrode, a negative electrode, a separator, and an electrolytic solution. The electrolytic solution includes fluoroethylene carbonate and a trinitrile compound. Based on a mass of the electrolytic solution, a mass percent of the fluoroethylene carbonate is A %, 2≤A≤6, a mass percent of the trinitrile compound is B %, 2≤B≤5, and A and B satisfy: 4≤A×B≤20. A defect rate of the negative electrode is denoted by an Id/Ig ratio, and satisfies: 0.07

公开(公告)号：US20230246156A1

公开(公告)日：2023-08-03

申请号：US18193995

申请日：2023-03-31

Applicant: Ningde Amperex Technology Limited

Inventor： Jianyu LIU ,  Wenqiang LI ,  Jianming ZHENG ,  Shuai XU

IPC: H01M4/04 ,  H01M10/0525 ,  H01M10/0569 ,  H01M50/534 ,  H01M10/0567

CPC classification number: H01M4/0404 ,  H01M10/0525 ,  H01M10/0569 ,  H01M50/534 ,  H01M10/0567 ,  H01M2300/0037 ,  H01M2300/0051

Abstract: An electrochemical apparatus, where the electrochemical apparatus includes electrodes, where the electrode includes a current collector, an active material layer disposed on at least one surface of the current collector, a tab disposed on the current collector, and a tab protection layer disposed on the tab, where the tab protection layer includes a first polymer layer, the first polymer layer has a melting point of TA° C., and 110≤TA≤136.5; and an electrolyte, where the electrolyte includes ethylene carbonate and propylene carbonate; based on a weight of the electrolyte, a sum of weight percentages of the ethylene carbonate and the propylene carbonate is Y %, and Y is 20-80; and Y and TA satisfy 0.147