CN-122000476-A - Battery cell, battery device and electricity utilization device

Abstract

The application discloses a battery cell, a battery device and an electricity utilization device. The battery monomer comprises electrolyte, the electrolyte comprises organic solvent and additive, the organic solvent comprises isoxazole compound, and the additive comprises nitrate and fluoride. The battery cell provided by the embodiment of the application can improve the low-temperature charging capability of the battery cell.

Inventors

• CHEN HUI
• Bian Cancan
• Guo Suogang
• FU CHENGHUA
• YE YONGHUANG

Assignees

• 宁德时代新能源科技股份有限公司

Dates

Publication Date

20260508

Application Date

20241107

Claims (13)

1. 1. A battery cell comprising an electrolyte, the electrolyte comprising an organic solvent and an additive, the organic solvent comprising an isoxazole compound, and the additive comprising a nitrate and a fluoride.
2. 2. The battery cell according to claim 1, wherein the isoxazole compound comprises a compound represented by formula 1: wherein R1, R2 and R3 are each independently selected from hydrogen atoms and unsubstituted or heteroatom-substituted alkyl groups having 1 to 10 carbon atoms.
3. 3. The battery cell of claim 2, wherein the heteroatom comprises one or more of a halogen atom, N, P, S, O, B.
4. 4. A battery cell according to claim 2 or 3, wherein the isoxazole compound comprises one or more of the following compounds:
5. 5. the battery cell according to any one of claims 1 to 4, wherein the isoxazole-based compound is contained in an amount of 10 to 90% by volume based on the total volume of the organic solvent.
6. 6. The battery cell of any one of claims 1 to 5, wherein the nitrate salt comprises one or more of lithium nitrate, sodium nitrate, potassium nitrate, copper nitrate, zinc nitrate, magnesium nitrate, aluminum nitrate.
7. 7. The battery cell according to any one of claims 1 to 6, wherein the nitrate in the electrolyte is present in an amount of 0.1 to 5% by mass.
8. 8. The battery cell of any one of claims 1 to 7, wherein the fluoride comprises one or more of lithium fluoride, sodium fluoride, potassium fluoride, copper fluoride, zinc fluoride, magnesium fluoride, aluminum fluoride.
9. 9. The battery cell according to any one of claims 1 to 8, wherein the mass content of the fluoride in the electrolyte is 0.1% to 5%.
10. 10. The battery cell according to any one of claims 1 to 9, wherein the mass ratio of the nitrate to the fluoride is 1 (0.02-50), and/or The mass ratio of the isoxazole compound to the nitrate is (10-90): 1.
11. 11. The battery cell according to any one of claims 1 to 10, wherein the organic solvent further comprises a carbonate, the carbonate being present in an amount of 10 to 90% by volume based on the total volume of the organic solvent.
12. 12. A battery device comprising the battery cell according to any one of claims 1 to 11.
13. 13. An electrical device comprising the battery device of claim 12.

Description

Battery cell, battery device and electricity utilization device Technical Field The application relates to the field of battery technology, in particular to a battery cell, a battery device and an electric device. Background Batteries are widely used in electronic devices such as cellular phones, notebook computers, battery cars, electric vehicles, electric airplanes, electric ships, electric car toys, electric toy ships, electric toy airplanes, and electric tools. In the development process of the battery cell, how to improve the quick charge performance of the battery cell is one of the problems to be solved in the present day. Disclosure of Invention The application provides a battery cell, a battery device and an electric device. In a first aspect, embodiments of the present application provide a battery cell comprising an electrolyte, the electrolyte comprising an organic solvent and an additive, the organic solvent comprising an isoxazole compound, the additive comprising a nitrate and a fluoride. According to the embodiment of the application, through the synergistic combination of the isoxazole compound, the nitrate and the fluoride, the electrolyte has lower viscosity, particularly can keep a low-viscosity state under a low-temperature condition, has higher ionic conductivity, enables the battery monomer to have better quick charging capability, and has better stability with the cathode active material, so that the battery monomer has higher capacity retention rate. In some embodiments, the isoxazole compound comprises a compound of formula 1: wherein R1, R2 and R3 each independently comprise a hydrogen atom, an unsubstituted or heteroatom-substituted alkyl group having 1 to 10 carbon atoms. In some embodiments, the heteroatom includes one or more of a halogen atom, N, P, S, O, B. In some embodiments, the isoxazole compound comprises one or more of the following compounds: in some embodiments, the isoxazole compound is present in an amount of 10% to 90% by volume based on the total volume of the organic solvent. In some embodiments, the nitrate salt comprises one or more of lithium nitrate, sodium nitrate, potassium nitrate, copper nitrate, zinc nitrate, magnesium nitrate, aluminum nitrate. In some embodiments, the nitrate salt is present in the electrolyte in an amount of 0.1% to 5% by mass. In some embodiments, the fluoride comprises one or more of lithium fluoride, sodium fluoride, potassium fluoride, copper fluoride, zinc fluoride, magnesium fluoride, aluminum fluoride. In some embodiments, the mass content of the fluoride in the electrolyte is 0.1% to 5%. In some embodiments, the mass ratio of nitrate to fluoride is 1 (0.02-50). In some embodiments, the mass ratio of the isoxazole compound to the nitrate is (10-90): 1. In some embodiments, the organic solvent further comprises a carbonate, the carbonate being present in an amount of 10% to 90% by volume based on the total volume of the organic solvent. In a second aspect, an embodiment of the present application provides a battery device, including a battery cell according to an embodiment of the first aspect of the present application. In a third aspect, an embodiment of the present application provides an electrical device, including a battery cell according to an embodiment of the first aspect of the present application or a battery device according to an embodiment of the second aspect of the present application. Drawings In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below. It is apparent that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained from the drawings without inventive work for those skilled in the art. Fig. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application. Fig. 2 is an exploded view of a battery according to some embodiments of the present application. Fig. 3 is an exploded view of the battery module shown in fig. 2. In the drawings, the drawings are not necessarily to scale. The reference numerals are as follows, 1, vehicle, 2, battery device, 3, controller, 4, motor, 5, box, 5a, first box, 5b, second box, 5c, accommodation space, 6, battery module, 7, battery cell. Detailed Description Hereinafter, embodiments of the battery cell, the battery device, and the power consumption device according to the present application are specifically disclosed with reference to the accompanying drawings. However, unnecessary detailed description may be omitted. For example, detailed descriptions of well-known matters and repeated descriptions of the actual same structure may be omitted. This is to avoid that the following description becomes unnecessarily lengthy, facilitating the understanding of those skilled in the art. Furthermore, the draw