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：US20220407115A1

公开(公告)日：2022-12-22

申请号：US17820944

申请日：2022-08-19

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chang PENG ,  Peipei CHEN ,  Hailin Zou ,  Chengdu LIANG

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

Abstract: A lithium-ion secondary battery is provided, where an electrolyte solution of the lithium-ion secondary battery comprises a highly heat-stable salt (My+)x/yR1(SO2N−)xSO2R2, where the My+ is a metal ion, R1 and R2 are each independently a fluorine atom, an alkyl with 1-20 carbon atoms, a fluoroalkyl with 1-20 carbon atoms, or a fluoroalkoxy with 1-20 carton atoms, x is 1, 2, or 3, and y is 1, 2, or 3. A mass percent of the salt in the electrolyte solution is set as k2%; a temperature rise coefficient k1 of the positive electrode sheet satisfies 2.5≤k1≤32, where k1=Cw/Mc, Cw is a positive electrode material load per unit area (mg/cm2) on the surface of any side of the positive electrode current collector on which a positive electrode material layer is loaded, and Mc is a carbon content (%) of the positive electrode material layer; and the lithium-ion secondary battery satisfies 0.34≤k2/k1≤8.