Sekundärbatterie und Elektronische Vorrichtung

Details

Veröffentlichungs-Nr.

EP4773283

Anmeldetag

30. Juni 2025

Veröffentlichung

5. März 2026

Rechtsraum

EP

Abstract

This application provides a secondary battery and an electronic device. The secondary battery includes an electrode assembly. The electrode assembly includes first electrode plates, second electrode plates, and separators. The first electrode plates include two outer first electrode plates and an inner first electrode plate. The two outer first electrode plates are located on two outermost sides of the electrode assembly respectively. The first electrode plate includes a first current collector and a first active material layer. The first current collector includes a first surface and a second surface. At least one of the outer first electrode plates is a single-side-coated first electrode plate. The first active material layer applied to the second surface of the single-side-coated first electrode plate is a first material layer. Both the first surface and the second surface of the inner first electrode plate are coated with the first active material layer. The first active material layer applied to the first surface and the second surface of the inner first electrode plate is a second material layer. A conductivity of the single-side-coated first electrode plate is a S/cm, and a conductivity of the inner first electrode plate is b S/cm, satisfying a ≤ b. This configuration reduces the risk of black spots and lithium plating on the outer electrode plates of the electrode assembly.

Anmelder

Firma

Ningde Amperex Technology Limited

Land

🇨🇳 China