公开(公告)号：US20240372145A1

公开(公告)日：2024-11-07

申请号：US18773617

申请日：2024-07-16

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huiling Chen ,  Zeli Wu ,  Changlong Han ,  Jie Guo ,  Lei Huang ,  Cuiping Zhang ,  Wenhao Liu

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0569

Abstract: The present application provides a secondary battery, a battery module, a battery pack, and an electrical device. The secondary battery includes a positive electrode plate, a negative electrode plate comprising a negative electrode active material; and an electrolytic solution including a first additive and a carbonate solvent, and the first additive including a boron-containing lithium salt and an ester additive, which are configured to form a solid electrolyte interface film on the surface of the negative electrode active material, wherein a discharge capacity of the secondary battery is denoted as B1 in Ah, a change in amount of gas production of the secondary battery is denoted as B2 in mL, a mass of the electrolytic solution is denoted as C in g, a reduction potential of the first additive relative to lithium metal is denoted as D.

公开(公告)号：US20240079651A1

公开(公告)日：2024-03-07

申请号：US18503190

申请日：2023-11-07

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zeli Wu ,  Bin Jiang ,  Changlong Han ,  Huiling Chen ,  Lei Huang ,  Cuiping Zhang ,  Jie Guo ,  Wenhao Liu

IPC: H01M10/0567 ,  H01M10/052 ,  H01M10/0568 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M10/052 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2004/027

Abstract: Provided are a non-aqueous electrolyte and a preparation method thereof, and a secondary battery and an electric apparatus containing the same. The non-aqueous electrolyte contains a non-aqueous solvent and lithium ions, first cations, and first anions dissolved therein, where the first cation is a metal cation Men+ other than the lithium ion, n representing a chemical valence of the metal cation; the first anion is a difluoroxalate borate anion DFOB−; mass concentration of the first cations in the non-aqueous electrolyte is D1 ppm, and mass concentration of the first anions in the non-aqueous electrolyte is D2 ppm, both based on total mass of the non-aqueous electrolyte; and the non-aqueous electrolyte satisfies that D1 is 0.5 to 870 and that D1/D2 is 0.02 to 2. The non-aqueous electrolyte in this application enables the secondary battery to have good cycling performance, safety performance, and kinetic performance.

公开(公告)号：US20240170726A1

公开(公告)日：2024-05-23

申请号：US18426355

申请日：2024-01-30

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zeli Wu ,  Huiling Chen ,  Changlong Han ,  Bin Jiang ,  Qian Liu ,  Jianfu He ,  Jingxuan Sun ,  Lei Huang

IPC: H01M10/0569 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0567 ,  H01M10/0568

CPC classification number: H01M10/0569 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0567 ,  H01M10/0568 ,  H01M2004/028

Abstract: This application provides a non-aqueous electrolyte and a preparation method thereof, and a secondary battery and an electric apparatus containing the same. The non-aqueous electrolyte contains the non-aqueous solvent and lithium ions, first cations, and first anions dissolved therein, where the first cation is a metal cation Men+ other than the lithium ion, n representing a chemical valence of the metal cation; the first anion is a tetrafluoroborate anion BF4−; mass concentration of the first cations in the non-aqueous electrolyte is D1 ppm, and mass concentration of the first anions in the non-aqueous electrolyte is D2 ppm, both based on total mass of the non-aqueous electrolyte; and the non-aqueous electrolyte satisfies that D1 is 0.1 to 1250 and that D1/D2 is 0.02 to 2. The non-aqueous electrolyte in this application enables the secondary battery to have good cycling performance, safety performance, and kinetic performance.