Patent ID: 7094496

Claim:
Electric accumulator battery, comprising independent modules, each one of which comprises a recipient with a lid, internally subdivided into cells in which positive and negative helically wound electrodes and an intermediate separator are housed, which modules have electric connection terminals and are housed in a containment, characterized in that the recipient of each module comprises an outer wall, of parallelepiped shape, and an inner wall defining three cylindrical cells, being two-to-two tangent, of coplanar axes and closed on the lower base; between whose inner and outer walls axial ventilation passages are defined, passing tbrough the base and lid of the module, and in that the modules are connectable in different configurations so that different battery shapes and/or battery voltages are attained and further characterized in that the cylindrical cells defined by the inner wall of the recipient of the modules have a gap from an upper edge of the inner wall in coincidence with a tangency span, in which a connector is tightly coupled.