Batteriezelle, Batterie und Elektrische Vorrichtung

Details

Veröffentlichungs-Nr.

EP4773385

Anmeldetag

26. Januar 2024

Veröffentlichung

31. Juli 2025

Rechtsraum

EP

IPC

H01M50/342

Abstract

A battery cell (20), a battery (100), and an electric device are disclosed. The battery cell (20) includes a housing (21) and a pressure relief component (214), where the housing (21) has a first wall portion (211), the first wall portion (211) has a first outer surface (2111) facing away from an interior of the housing (21). The pressure relief component (214) is disposed on the first wall portion (211), where the pressure relief component (214) includes a first weak portion (2145), and the pressure relief component (214) is configured as capable of rupturing along at least a part of the first weak portion (2145) during pressure relief of the battery cell (20). A minimum radial dimension of the first outer surface (2111) is A, a radial direction is a direction passing through a center point of the first outer surface (2111), and an outer edge of the first outer surface (2111) is offset toward the center point of the first outer surface (2111) by a predetermined distance L₁ to form a first edge (2143), where L₁ = 0.05*A. Along a thickness direction of the first wall portion (211), a projection of the first weak portion (2145) on the first outer surface (2111) is located within the first edge (2143). The first edge (2143) defines a first region (2144) with lower stiffness, so that a thickness of the first weak portion (2145) located in the first region (2144) is greater under the same burst pressure, making the first weak portion (2145) less likely to rupture prematurely, thereby improving the lifespan of the battery cell (20).

Anmelder

Firma

Contemporary Amperex Technology Co., Limited

Land

🇨🇳 China

Fachgebiete