Sekundärbatterie und Elektrische Ausrüstung

Details

Veröffentlichungs-Nr.

EP4773201

Anmeldetag

7. Januar 2025

Veröffentlichung

9. Oktober 2025

Rechtsraum

EP

Abstract

This application relates to the technical field of electrochemical apparatuses, and in particular, to a secondary battery and an electric device. The secondary battery includes a negative electrode plate, where the negative electrode plate includes a current collector, a first active material layer, and a second active material layer, the first active material layer is disposed on at least one surface of the current collector, the second active material layer is disposed on a side of the first active material layer facing away from the current collector, the first active material layer includes a silicon-based material and a first graphite material, the second active material layer includes a second graphite material and an inorganic material, and a ratio of a particle size D_v50 of the inorganic material to a particle size D_v50 of the second graphite material is less than 0.23. The secondary battery and the electric device can improve the problem of overpressure of the second active material layer, suppression by the second active material layer on swelling of the silicon-based material can be maintained, and structural integrity and structural stability of the negative electrode plate can be enhanced.

Anmelder

Firma

Ningde Amperex Technology Limited

Land

🇨🇳 China