NOVELTY - The pack has an apparatus unit (12) connected to a battery unit. The battery unit is divided into two battery units (10a, 10b). The apparatus unit is positioned between the divided battery units. The divided battery units and the apparatus unit are mutually fixed. A pair of end plates (14) clamps integrally the divided battery units and the apparatus unit to form a space between the apparatus unit and the divided battery units. Unevenness is formed in a surface in contact with one of the divided battery units and another surface in contact with the other divided battery unit.    USE - Battery pack i.e. square-shaped nickel-hydrogen battery pack, for use in a hybrid vehicle and an electric vehicle.    ADVANTAGE - The pack provides connection between the battery unit and the apparatus unit, so that cable length is shortened by arranging the apparatus unit between the divided battery units, thus operating the pack in an efficient manner and reducing cost of the pack. The apparatus unit is simultaneously clamped by the end plates, which clamp the battery unit, so that influence of electromagnetic noise with respect to the apparatus unit can be reduced by using the end plates as metal. The apparatus unit can be cooled by positioning the apparatus unit between the divided battery units using refrigerant for cooling the battery unit. The apparatus unit is simultaneously restrained at time of restraint of the battery unit, so that manufacturing process of the pack can be simplified. The pack eliminates need to arrange an additional metal plate for preventing mixing of the electromagnetic noise to the apparatus unit and to apply the end plates as a shielding unit of electromagnetic noise. The end plates are provided at an outer side of the pack, so that the apparatus unit can be protected from external impact.    DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of a battery pack.    Battery units (10a, 10b)    Apparatus unit (12)    End plates (14)    Cooling duct (20)    Cooling fan (22)