Sekundärbatterie und Elektrische Vorrichtung

Details

Veröffentlichungs-Nr.

EP4787522

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 and comprising a negative electrode active material; the negative electrode active material comprises a first carbon-based material and a second carbon-based material; the first carbon-based material comprises artificial graphite of secondary particles; the second carbon-based material comprises an outer region and an inner region located on the inner side of the outer region; the outer region refers to a region extending from the particle surface of the second carbon-based material to the interior of the particle by a distance of 2.5 µm; and in the cross-sectional view of the second carbon-based material, the total pore area of the outer region is denoted as S1, the total pore area of the inner region is denoted as S2, and S2 is greater than S1.

Anmelder

Firma

Contemporary Amperex Technology Co., Limited

Land

🇨🇳 China