A vehicle battery system has a vehicle battery, a cooling device to cool the vehicle battery and which includes a heat sink in thermal contact with the battery cells to transfer heat from the battery cells to the heat sink. The heat sink has at least one cooling channel through which a coolant may flow and connection ends formed by delimitations of the at least one cooling channel. A coolant distributor is provided at and connected to at least one end of the heat sink at a receiving region which is adhesive bonded to the heat sink, the receiving region of the coolant distributor surrounding the connection ends of the heat sink, in which the end faces of the delimitations of the cooling channel form stops for the coolant distributor which abut contact surfaces of the coolant distributor.