Batteriezelle, Batterie und Elektrische Vorrichtung

Details

Veröffentlichungs-Nr.

EP4769678

Anmeldetag

12. Juli 2024

Veröffentlichung

30. Mai 2025

Rechtsraum

EP

IPC

H01M50/10, H01M50/103

Abstract

The present application provides a battery cell, a battery, and an electric device. The battery cell includes a casing, an end cover, and an electrode assembly. The casing has an opening at at least one end along a first direction, the casing includes a first wall, the end cover closes the opening, and the first wall is welded to the end cover to form a first connecting portion. The electrode assembly is at least partially accommodated in the casing, where the electrode assembly includes a positive electrode plate and a negative electrode plate, at least a part of the positive electrode plate and at least a part of the negative electrode plate are stacked along a second direction, the second direction is parallel to the thickness direction of the first wall, and the first direction intersects the second direction. The first wall includes a first zone and a second zone arranged along the first direction, the thickness of the first zone is greater than the thickness of the second zone, and the first zone is located between the first connecting portion and the second zone. This reduces the risk of fatigue cracking in a region of the first wall near the first connecting portion due to the expansion of the electrode assembly, thereby improving the service life of the battery cell.

Anmelder

Firma

Contemporary Amperex Technology Co., Limited

Land

🇨🇳 China