Negativelektrodengehäuse für Alkalische Primärknopfbatterie und Alkalische Primärknopfbatterie

Details

Veröffentlichungs-Nr.

EP4804305

Anmeldetag

30. Januar 2025

Veröffentlichung

4. September 2025

Rechtsraum

EP

Abstract

A negative electrode can (40) includes a top portion (42) and a negative-electrode-can peripheral wall portion (44), and is inserted into a positive electrode can (20). An inner cylindrical portion (45) of the negative-electrode-can peripheral wall portion (44) includes a first curved portion (51) extending in a curved manner downward from an outer peripheral edge of the top portion (42), a second curved portion (52) extending in a curved manner outward in a radial direction from a lower edge of the first curved portion (51), and a third curved portion (53) extending in a curved manner downward from an outer peripheral edge of the second curved portion (52). A radius of curvature of an outer surface (52a) of the second curved portion (52) in a longitudinal cross section is larger than a radius of curvature of an inner surface (51a) of the first curved portion (51) in the longitudinal cross section and a radius of curvature of an inner surface (53a) of the third curved portion (53) in the longitudinal cross section. In the longitudinal cross section, an angle θ formed between a common tangent line (L) of the inner surface (51a) of the first curved portion (51) and the inner surface (53a) of the third curved portion (53) and an axial direction is 40° or more and less than 60°.

Anmelder

Firma

Seiko Instruments Inc.

Land

🇯🇵 Japan