Sekundärbatterie und Elektrische Vorrichtung

Details

Veröffentlichungs-Nr.

EP4773206

Anmeldetag

9. September 2024

Veröffentlichung

4. Dezember 2025

Rechtsraum

EP

Abstract

A secondary battery and an electric device. The secondary battery comprises a negative electrode sheet and a positive electrode sheet. The negative electrode sheet comprises a negative electrode film layer, which comprises artificial graphite having a graphitization degree of greater than 93%. The positive electrode sheet comprises a positive electrode film layer, which comprises a positive electrode active material having a single-crystal-particle morphology. On the basis of the total number of moles of nickel, cobalt, and manganese in the chemical formula of the positive electrode active material being 1, the number of moles of nickel in the chemical formula of the positive electrode active material is a, a being 0.6 to 1. The areal density of the negative electrode film layer is σ1, and the areal density of the positive electrode film layer is σ2, where σ1/σ2 is 0.35 to 0.75. The secondary battery has a low expansion force, good cycling performance, and high energy density.

Anmelder

Firma

Contemporary Amperex Technology Co., Limited

Land

🇨🇳 China