Battery mounting structure for saddle-type electric vehicles

A battery mounting structure in a saddle electric vehicle including a twin-tube frame having a pair of left and right main frames extending rearwardly from a head pipe, a propulsive battery including a plurality of battery modules, and a motor energized by electric power supplied from said propulsive battery, comprising:

• each of said battery modules is in the form of a quadrangular prism having long sides and short sides as viewed in plan and vertical sides longer than said long sides, said twin-tube frame includes a bulging region in which each of said main frames bulges outwardly from said head pipe as viewed in plan and a narrow region in which a distance between said main frames is reduced behind said bulging region, said battery modules include battery modules whose long sides extend along transverse directions of the vehicle in said bulging region and battery modules whose long sides extend along longitudinal directions of the vehicle in said narrow region.