NOVELTY - The battery pack (1) has a battery module (6) that houses unit cells and a heat storage portion (11) including a heat storage element (13) that absorbs heat when changing from solid to liquid and dissipates heat when changing from liquid to solid. A heat storage container that houses the heat storage element is thermally connected to the battery module. A cooling source (21) circulates cooling medium to the cooling passages (18a,18b) through which heat of the heat storage portion is spread and discharged.    USE - Battery pack for vehicle heating apparatus (claimed).    ADVANTAGE - Heat of the unit cells accompanied by charging is reliably absorbed by the heat storage element and even though an amount of heat generated from the unit cells during charging is increased, the excessive rise of the battery temperature is suppressed, which may not cause reliability degradation, e.g., a reduction in the life of the unit cells. Cooling performance is improved because a heat dissipation area with respect to the cooling passages is increased by a cooling passage element, which also acts as a rectification plate that suppresses the turbulence of air flow. Cooling performance is improved since a contact surface pressure between the heat storage container and the cooling passage element is also increased, a thermal contact resistance is reduced and heat of the heat storage element is efficiently transferred to the cooling passage element. Regardless of the volume change of the heat storage element, a thermal contact resistance between contact interfaces is reduced, and an excessive rise of the battery temperature is suppressed.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a vehicle heating apparatus.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic cross-sectional plan view of a battery pack.    Battery pack (1)    Battery module (6)    Heat storage portion (11)    Heat storage element (13)    Cooling passages (18a,18b)    Cooling source (21)