Electrical battery module comprising: —a casing (2) comprising a longitudinal body (3) suitable for longitudinally receiving a plurality of electrical batteries (4), one next to the other, and an end cover (5) coupled to one of the ends of said longitudinal body; —an internal, radial electrical connection plate (7) and an external, radial electrical connection plate (8), axially arranged on both sides of said end cover (5); —and at least one axial, electrical connection pad (17, 21) of said internal and external plates (7, 8), axially crossing said cover (5); the interior radial plate (7) comprising a plurality of electrical contact means (13) suitable for being respectively in contact with one end of said electrical batteries (4); and the external radial plate (8) comprising a plurality of electrical distribution means (19) intended for external electrical connection of this external radial plate (8).