Terminal rivet assembly for a battery cell

A method (100) for riveting a terminal rivet (200) for a cylindrical secondary cell (300), wherein the terminal rivet (200) comprises a head (210) and a shaft (220) extending from the head (210), said method comprising the steps of:

• arranging (101) the shaft (220) of the terminal rivet (200) axially (A) through an opening (311) in a casing (310) of the secondary cell (300) such that the head (210) of the terminal rivet (200) abuts an external surface (312) of the casing (310) to thereby form an external terminal for the secondary cell (300);
• deforming (102) the shaft (220) towards an internal surface (313) of the casing (300);
• and
• deforming (103) the head (210) towards the external surface (312) of the casing (300), thereby towards the deformed shaft (220).

A terminal rivet (200) for a cylindrical secondary cell (300) comprising, in a riveted state:

• a shaft (220) configured to extend axially (A) through a casing (310) of the secondary cell (300) to thereby electrically contact a current collecting plate (320) of the secondary cell (300) at a first end of the shaft (220);
• and
• a head (210) arranged at a second end of the shaft (220), configured to form an external terminal (200) for the secondary cell (300),
• wherein:
• the shaft (220) comprises a first deformation region (221) bent towards an internal surface (313) of the casing;
• and
• the head (210) comprises a second deformation region (211) bent towards an external surface (312) of the casing (310).