Terminal rivet for a secondary cell

A terminal assembly (100) for a cylindrical secondary cell comprising:

• a rivet (105) comprising:
• an external portion (120) configured to close an opening in a casing of the cylindrical cell, to be arranged on the outside of the casing, and to deform during riveting such that an outer facing surface of the external portion (120) becomes substantially uneven, and
• an internal portion (110) configured to provide a direct electrical connection between an electrode roll in the secondary cell and the external portion (120), the internal portion (110) comprising:
• a shaft (110a) configured to extend axially through the casing of the secondary cell from the external portion (120), and
• a current collecting portion (110b) joined to the shaft (110a) at a first end of the shaft (110a), configured to be in direct electrical contact with the electrode roll in the secondary cell, to thereby function as a current collecting plate in the secondary cell,
• wherein:
• the external portion (120) of the rivet extends like a flange from the second end of the shaft (110a), and
• the terminal assembly (100) further comprises a cover part (150) configured to be attached to the rivet (105) to cover and with an inner surface (155) electrically contact the external portion (120) of the rivet, such that an outer surface (157) of the cover part (150) is configured to form a terminal surface of the secondary cell.