公开(公告)号：US20230318042A1

公开(公告)日：2023-10-05

申请号：US18322597

申请日：2023-05-24

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Limei Zhang ,  Peipei Chen ,  Liye Li

IPC: H01M10/0569 ,  H01M10/0567

CPC classification number: H01M10/0569 ,  H01M10/0567 ,  H01M2300/0037

Abstract: An electrolyte solution, a secondary battery, a battery module, a battery pack and a powered device are provided. In some embodiments, the electrolyte solution comprises an organic solvent and an additive, the organic solvent comprises a first organic solvent shown in Formula 1, and the additive comprises a first additive selected from one or more of compounds represented by Formula 2A and Formula 2B. In Formula 1, R1 and R2 are each independently one of C1-C3 alkyl and C1-C3 haloalkyl; in Formula 2A, R21, R22, R23, and R24 are each independently one of single bond and methylene; in Formula 2B, R31, R32, R33, and R34 are each independently one of a single bond and methylene, and R4 is one of a single bond, —O—, C1-C3 alkylene, C1-C3 haloalkylene, and C1-C3 oxaalkylene. The secondary battery of the present application has good fast charging performance while ensuring long cycle life and storage life.

公开(公告)号：US11777134B2

公开(公告)日：2023-10-03

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 ,  H01M4/04 ,  H01M4/131 ,  H01M4/38 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M10/0568 ,  H01M10/0569 ,  H01M4/02

CPC classification number: H01M10/0525 ,  H01M4/0404 ,  H01M4/131 ,  H01M4/386 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2004/021 ,  H01M2004/027

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：US11196086B2

公开(公告)日：2021-12-07

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 ,  H01M4/02

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.