NOVELTY - The device has main circuits (4, 5) containing refrigerant liquid i.e. chlorofluorocarbon, and interconnecting an evaporator (1) and a condenser (3) of a motor vehicle. The main circuits are connected to respective branch circuits (7, 8) for supplying the liquid to another evaporator (9) to cool a battery (11) contained in a case (10). The latter evaporator is arranged outside the case and provided in contact with a thermally conductive part (14) i.e. radiator, of the case, where the radiator is provided with a metal sole (15). The conductive part is integrated in an outer wall of the case.    USE - Device for cooling a battery such as electrochemical battery e.g. lithium battery, nickel-metal hydride battery and nickel cadmium battery, of a motor vehicle such as electric vehicle (all claimed) i.e. hybrid electric vehicle.    ADVANTAGE - The evaporator is arranged outside the case so as to reduce the volume and fabrication cost of the case. The evaporator arranged outside the case is provided in contact with the thermally conductive part of the case, thus allowing exchange of heat between the evaporator and an inner side of the case, and hence optimizing the cooling of the battery inside the case. The case containing battery is fixed in the vehicle in a removable manner so as to remove the case from the vehicle in an easy manner. The device efficiently cools the battery of the vehicle during rapid battery recharging cycle when the vehicle is stopped. The device is configured such that a motor of the vehicle is rotated to drive a compressor and to close a valve of the main circuit so as to avoid ill-timed cooling of a cab interior of the vehicle. The configuration of the device avoids the exceeding of temperature of the battery to 40 degree Celsius while cooling the cab interior during movement of the vehicle.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a battery cooling device.    Evaporators (1, 9)    Condenser (3)    Main circuits (4, 5)    Branch circuits (7, 8)    Case (10)    Battery (11)    Thermally conductive part (14)    Metal sole (15)