公开(公告)号：US11329319B2

公开(公告)日：2022-05-10

申请号：US17135600

申请日：2020-12-28

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Hailin Zou ,  Ming Zhang ,  Changlong Han ,  Cuiping Zhang

IPC: H01M10/056 ,  H01M10/0567 ,  H01M50/538 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0587 ,  H01M4/02

Abstract: The present disclosure relates to a lithium ion battery including an electrode assembly; and an electrolytic solution for infiltrating the electrode assembly and an electrical apparatus including the same, wherein the electrode assembly includes an electrode body, a positive electrode tab, and a negative electrode tab. The electrode body includes a positive electrode plate, a negative electrode plate, and a separator that are wound together around an axis. The positive electrode plate includes a positive current collector and a positive electrode material layer provided on at least one surface of the positive electrode current collector. In an axial direction (X), the electrode body has two opposite side portions, and the positive electrode tab and the negative electrode tab extend from the two side portions of the electrode body, respectively. A diffusion rate v of the electrolytic solution to the electrode body is from 0.01 μg/s to 5 μg/s.

公开(公告)号：US20220021020A1

公开(公告)日：2022-01-20

申请号：US17320258

申请日：2021-05-14

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Cuiping Zhang ,  Changlong Han ,  Ming Zhang ,  Peipei Chen ,  Hailin Zou

IPC: H01M10/0525 ,  H01M10/04 ,  H01M10/0585 ,  H01M10/0568 ,  H01M4/131 ,  H01M10/0567 ,  H01M10/0569

Abstract: This application relates to lithium-ion batteries and related battery modules, battery packs and devices. Specifically, the lithium-ion battery includes a positive electrode plate, a negative electrode plate, an electrolyte, and a separator, wherein the positive electrode plate includes aluminum foil as a positive electrode current collector, and a content of element copper atom as an impurity per unit area of the aluminum foil is from 0.009 g/m2 to 0.021 g/m2, and the electrolyte contains first lithium salt and additive A, and the first lithium salt is a fluorine-containing sulfonimide lithium salt, and relative to total molar amount of lithium salt in the electrolyte, the fluorine-containing sulfonimide lithium salt has a molar amount of 30 mol % or higher; and the additive A is at least one of a phosphate compound containing an unsaturated bond, a cyclic compound containing a —SO2— bond and a silicon-oxygen compound containing an unsaturated bond.