Power battery pack arrangement, connection and assembly structure

The invention discloses a power battery pack arrangement, connection and assembly structure, which comprises a shell, cylindrical batteries, electrode connecting sheets and fixed partition boards, wherein every three cylindrical batteries form a module and are connected in parallel by the star-like electrode connecting sheets and arranged in two rows, and the cylindrical batteries are staggered complementarily in two rows; and two ends of the batteries are correspondingly fixed and clamped in circular positioning caps inside left and right inner positioning plates. The wall thickness of the circular positioning caps inside the inner positioning plates is 1 to 2 millimeters, and the peripheries of all the circular positioning caps are tangential. The anodes and the cathodes of the adjacentmodules of each row are inverted, and the polarities of the first modules of the adjacent rows are opposite. Left and right outer positioning plates are arranged outside the left and right inner positioning plates; the left outer positioning plate is provided with the electrode connecting sheet and limiting grooves of the electrode connecting sheets, two ends of which anodes and cathodes are vertically led out; the anodes and the cathodes of the corresponding modules of the two adjacent rows are connected in series by the straight electrode connecting sheets on the right outer positioning plate; and the inner and outer positioning plates are connected with the shell through the surrounding edges. Groove reinforcing ribs are positioned in the middle of the left and right cover plates of the shell, and end plates at two ends are provided with vents.