NOVELTY - The battery is of the type which is forced cooled during recharging At the moment of controlled operation, by passing a first predetermined step level (Steptemp. high). A supervisor (2) produces a recharge battery (6) command by regeneration or recuperation, so that the battery temperature drops below a second predetermined step level (Steptemp. low).    USE - For controlling battery temperature in hybrid automobile drives.    ADVANTAGE - Designed to ensure the battery is available for use at all times.    DETAILED DESCRIPTION - Hybrid automobile drive, of the type in which the drive system includes an electric (4) and IC thermal engine (3). It is of the type in which a supervisor (2) has a generator which produces control signals (Ct,Ce) for the drive system to place in into an thermal or electric operating mode. The electric motor (4) is fed from a battery (6) of the type which heats up during discharge. The supervisor has an operating mode change signal generator (17) (hystmode temp. battery) which receives an instantaneous temperature measuring signal from the battery (Temperaturebattery) and which: (a) when the supervisor (2) indicates an electric operating mode, takes an indicating value of a thermal or hybrid operating mode, when the battery temperature exceeds a first predetermined step (Steptemp. high, or when; (b) the supervisor (2) indicates a thermal operating mode, takes a value indicating an electric operating mode when the battery temperature falls to a second predetermined level (steptemp. low), a value indicating an electric operating mode. The first and second predetermined levels are less than a battery critical temperature so that the battery remains permanently available at the request of the user. The mode change signal generator (17) is connected as control input to the generator (18) for control of the thermal engine and electric motor.    DESCRIPTION OF DRAWING(S) - The drawing shows a graph of the possible variations of the control signal (the drawing contains non-English language text)    mode change (hystmode temp. battery)    hybrid mode (hybride)    electric mode (electrique)    low battery temperature level (Steptemperature low)    high temperature level (Steptemperature high)    critical battery temperature level (Stepcrtique)