公开(公告)号：US20220059867A1

公开(公告)日：2022-02-24

申请号：US17516504

申请日：2021-11-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Liye LI ,  Zeli WU ,  Changlong HAN ,  Chenghua FU

IPC: H01M10/0525 ,  H01M4/38 ,  H01M4/583 ,  H01M4/04 ,  H01M10/0568 ,  H01M10/0569 ,  H01M4/131 ,  H01M4/525 ,  H01M4/505

Abstract: The application provides a secondary battery and a device including the same. The second battery includes: a negative electrode plate, the negative electrode plate including a negative active material; a separation film, the separation film including a base material and a coating arranged on at least one surface of the base material; and an electrolyte, the electrolyte including an organic solvent, where the negative active material includes a silicon-based material and a carbon material; thickness of the base material of the separation film is 7 μm˜12 μm; and the organic solvent includes ethylene carbonate, and a weight ratio of the ethylene carbonate in the organic solvent is ≤20%. The secondary battery and the device including the same, which are provided by the application, in the premise of having high energy density, can also have good high-temperature cycle performance, good high-temperature storage performance, and low low-temperature direct current resistance.

公开(公告)号：US20230084934A1

公开(公告)日：2023-03-16

申请号：US17953327

申请日：2022-09-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chang PENG ,  Peipei CHEN ,  Hailin ZOU ,  Liye LI

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/62 ,  H01M10/0567

Abstract: This application provides a lithium-ion battery, including: an electrode assembly and an electrolytic solution.
The lithium-ion battery may satisfy the following condition: 0.6≤α≤0.9, and 4≤w×α/β1≤25, where, α=La/Lc, La is an arc length of a convex surface of the negative current collector corresponding to a concave surface of an innermost first circle of positive electrode in a jelly-roll structure of the electrode assembly, Lc is an arc length of a concave surface of an innermost first circle of positive current collector in the jelly-roll structure of the electrode assembly, and La and Lc are measured in mm; w is a percent of the first lithium salt LixR1(SO2N)xSO2R2 by mass in the electrolytic solution; and β1 is a thickness of the metallic conductive layer in the positive current collector, measured in μM.

公开(公告)号：US20240113287A1

公开(公告)日：2024-04-04

申请号：US18539282

申请日：2023-12-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chang PENG ,  Peipei CHEN ,  Hailin ZOU ,  Liye LI

IPC: H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0567

CPC classification number: H01M4/366 ,  H01M4/626 ,  H01M10/0525 ,  H01M10/0567

Abstract: This application provides a lithium-ion battery, including: an electrode assembly and an electrolytic solution. The electrolytic solution may comprise a first lithium salt LixR1(SO2N)xSO2R2, wherein R1 and R2 each independently represent an alkyl with 1 to 20 fluorine atoms or carbon atoms, or a fluoroalkyl with 1 to 20 carbon atoms, or a fluoroalkoxyl with 1 to 20 carbon atoms, and x is an integer of 1, 2, or 3, and a second lithium salt, wherein the second lithium is at least one selected from LiPF6, LiAsF6, or LiBF4, wherein a thickness of the metallic conductive layer, β1, is in a range of 0.52 μm to 2.4 μm, and a mass percentage of the first lithium salt, w, is 5% to 30% based on a total mass of the electrolytic solution.

公开(公告)号：US20230335799A1

公开(公告)日：2023-10-19

申请号：US18331665

申请日：2023-06-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chang PENG ,  Peipei CHEN ,  Liye LI ,  Limei ZHANG

IPC: H01M10/0568 ,  H01M10/0567 ,  H01M10/058 ,  H01M10/0525 ,  H01M50/209

CPC classification number: H01M10/0568 ,  H01M10/0567 ,  H01M10/058 ,  H01M10/0525 ,  H01M50/209 ,  H01M2220/20

Abstract: An electrolyte includes an electrolytic salt having a molar concentration greater than or equal to 1.4 mol/L and an additive including MSO3F (fluorosulfonate salt), where M is one or more metal ions selected from Li+, Na+, K+, Rb+, and Cs+.

公开(公告)号：US20210119260A1

公开(公告)日：2021-04-22

申请号：US17131803

申请日：2020-12-23

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Cuiping ZHANG ,  Ming ZHANG ,  Peipei CHEN ,  Hailin ZOU ,  Liye LI

IPC: H01M10/0568 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/525 ,  C07C311/48 ,  C07D327/00

Abstract: The present application relates to a lithium ion battery, comprising: a positive electrode plate, a negative electrode plate, a separator disposed between the positive electrode plate and the negative electrode plate, and an electrolytic solution, the positive electrode plate including a positive electrode current collector and a positive electrode active material layer provided on at least one side of the positive electrode current collector, and the electrolytic solution including an organic solvent, a lithium salt and an additive, wherein the lithium salt comprises a primary lithium salt, the primary lithium salt is a first compound in an amount of 30% or more relative to the total molar amount of the lithium salt, and the first compound has a structure represented by the following formula I, and wherein the additive comprises a second compound represented by the following formula II.