Abstract: A power supply device includes: a battery assembly including stacked battery cells and electrodes of the battery cells, the electrodes of the adjacent battery cells being arranged to face each other; a connecting portion of an electric wire for voltage detection directly connected to a pair of the electrodes of the adjacent battery cells arranged to face each other; and an insulating block body disposed on a side on which the electrodes of the battery assembly project, including the electric wire for voltage detection wired in the insulating block body, and configured to hold the connecting portion of the electric wire for voltage detection.

Abstract: A power supply device includes a terminal including an electrode connection part having first and second surfaces directed to opposite sides each other, a first battery cell arranged on one side based on a position of the electrode connection part, and a second battery cell arranged on the other side based on the position of the electrode connection part and stacked on the first battery cell. The first battery cell has a first electrode arranged to be superposed on the first surface of the electrode connection part. The second battery cell has a second electrode arranged to be superposed on the second surface of the electrode connection part.

Abstract: A power supply device includes: a battery assembly including stacked battery cells and electrodes of the battery cells, the electrodes of the adjacent battery cells being arranged to face each other; a connecting portion of an electric wire for voltage detection directly connected to a pair of the electrodes of the adjacent battery cells arranged to face each other; and an insulating block body disposed on a side on which the electrodes of the battery assembly project, including the electric wire for voltage detection wired in the insulating block body, and configured to hold the connecting portion of the electric wire for voltage detection.