Patent ID: 8426056

Claim:
A power supply device comprising: a cell assembly which includes a plurality of cells, each of the cells having a positive electrode at one end and a negative electrode at the other end; a plurality of connecting members, each of which connects the positive electrode of one cell and the negative electrode of a neighboring cell in the cell assembly, the one cell and the neighboring cell being mutually adjacent; a plate to which the plurality of connecting members are attached and which is overlapped on the cell assembly; a positioning unit that relatively positions the cell assembly to the plate; and a guide unit that guides the plurality of connecting members to positions where the connecting members respectively come into contact with the corresponding positive electrodes and negative electrodes when the plate is attached to the cell assembly, wherein each of the connecting member includes: a pair of contact pieces that position the positive electrode and the negative electrode therebetween; and a connecting piece that connects one end part of the pair of contact pieces to each other; and wherein the guide unit is the pair of contact pieces having a space therebetween which is provided so as to be gradually larger than a space between the positive electrode and the negative electrode as the guide unit comes nearer to the positive electrode and the negative electrode.