Sekundärbatterie und Elektrische Vorrichtung

Details

Veröffentlichungs-Nr.

EP4787447

Anmeldetag

28. Mai 2024

Veröffentlichung

5. Juni 2025

Rechtsraum

EP

Abstract

A secondary battery and an electric device. The secondary battery comprises a negative electrode sheet. The negative electrode sheet comprises a negative electrode current collector and a negative electrode film layer located on at least one surface of the negative electrode current collector, wherein the negative electrode film layer has a first surface away from the negative electrode current collector and a second surface arranged opposite to the first surface; the thickness of the negative electrode film layer is denoted as H; a region within a thickness range from the first surface of the negative electrode film layer to 0.3H is denoted as a first region, which comprises a first negative electrode active material; the first negative electrode active material comprises a first carbon-based material; and the first carbon-based material satisfies the condition that the total pore area S1 of an external region is less than the total pore area S2 of an internal region. The secondary battery has improved dynamic performance, and the volume distribution particle size Dv50 of the first carbon-based material is less than or equal to 15 µm.

Anmelder

Firma

Contemporary Amperex Technology Co., Limited

Land

🇨🇳 China