公开(公告)号：US11923536B2

公开(公告)日：2024-03-05

申请号：US17345109

申请日：2021-06-11

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Bo Cheng ,  Changlong Han

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/48 ,  H01M50/431 ,  H01M50/446

CPC classification number: H01M4/366 ,  H01M4/38 ,  H01M4/48 ,  H01M50/431 ,  H01M50/446 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/10 ,  H01M2220/20

Abstract: The present application relates to a composite material with a core-shell structure for battery, wherein the core is made of a core material including metallic copper or a copper-containing compound; the shell is made of a shell material including at least one of silicon dioxide and titanium dioxide; and the core material has an average particle size D50 of 0.01 μm-5 μm, optionally 0.1 μm-3 μm, and more optionally 0.1 μm-2 μm. The present application also relates to secondary battery containing the composite material, a battery module, a battery pack, and an apparatus.

公开(公告)号：US11942600B2

公开(公告)日：2024-03-26

申请号：US17565474

申请日：2021-12-30

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yongkun Li ,  Kai Wu ,  Bo Cheng ,  Feng Ju

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

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/4235 ,  H01M2300/0025

Abstract: In the embodiments of the present application, an electrolyte, a lithium-ion battery comprising the electrolyte, a battery module, a battery pack, and a device are provided. The electrolyte in the embodiments of the present application comprises an organic solvent, an electrolyte lithium salt dissolved in the organic solvent, and an additive comprising a first additive and a second additive. The first additive is selected from one or more of the compounds represented by formula I, and the second additive is selected from one or more of the compounds represented by formula II. After applying the electrolyte of the present application to a lithium-ion battery, the lithium ion battery has a better cycle performance and storage performance at a high temperature, and lower direct-current impedance at a low temperature, such that the lithium ion battery has both a better high-temperature performance and a better low-temperature performance.

公开(公告)号：US20220216517A1

公开(公告)日：2022-07-07

申请号：US17702645

申请日：2022-03-23

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yongkun LI ,  Kai Wu ,  Bo Cheng ,  Feng Ju

IPC: H01M10/0567 ,  H01M10/0525

Abstract: This application provides an electrolyte for lithium-ion battery, a lithium-ion battery, a battery module, a battery pack, and an apparatus. The electrolyte includes an organic solvent, an electrolytic lithium salt dissolved in the organic solvent, and additives, where the additives include a first additive and a second additive. The first additive includes an alkenyl dioxaborolane compound represented by formula I or formula II, and the second additive includes phosphoric acid cyclic anhydride represented by formula III. After the electrolyte of this application is applied to a lithium-ion battery, the lithium-ion battery can, at high voltage, have a good high-temperature cycling performance and high-temperature storage performance, a low direct current resistance, as well as good high-voltage characteristics.