Sekundärbatterie und Elektronische Vorrichtung
Anmelder: Ningde Amperex Technology Limited 🇨🇳
Details
- Veröffentlichungs-Nr.
- EP4773341
- Anmeldetag
- 28. April 2025
- Veröffentlichung
- 4. Dezember 2025
- Rechtsraum
- EP
- IPC
- H01M10/54
Abstract
This application provides a secondary battery and an electronic apparatus. A negative electrode material layer of the secondary battery includes a first negative electrode material layer and a second negative electrode material layer that are stacked, where the second negative electrode material layer is located between the first negative electrode material layer and a negative electrode current collector, a thickness of the first negative electrode material layer is H<sub>1</sub> µm, and a thickness of the second negative electrode material layer being H<sub>2</sub> µm, where 20≤H<sub>1</sub>≤40, and 60≤H<sub>2</sub>≤90; and D<sub>v</sub>50 of a first negative electrode active material in the first negative electrode material layer is greater than D<sub>v</sub>50 of a second negative electrode active material in the second negative electrode material layer. An electrolyte includes lithium difluorophosphate and a propionate compound, where the propionate compound includes propyl propionate; and based on a mass of the electrolyte, a mass percentage of the lithium difluorophosphate is W<sub>1</sub>%, and a mass percentage of the propyl propionate is W<sub>2</sub>%, where 0.1≤W<sub>1</sub>≤1, 10≤W<sub>2</sub>≤60, and 4≤W<sub>1</sub>×H<sub>1</sub>≤35. The secondary battery of this application has good kinetic performance and high-temperature float charging performance.
Anmelder
- Firma
- Ningde Amperex Technology Limited
- Land
- 🇨🇳 China
Chinesischer Hersteller von Lithium-Ionen-Batterien mit Sitz in Ningde, mehrheitlich im Besitz des japanischen Konzerns TDK. Aus dem Unternehmen ging 2011 die heute eigenständige CATL hervor.
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