(US5783872-A)      The auxiliary battery (30) circuit has a temperature compensation circuit (32) for a DC/DC converter (22) and has a voltage sensitive resistor (120), such as a thermistor, coupled to a clamped voltage divider network (126, 128). The voltage divider generates a resistance versus temperature characteristic so as to control the DC/DC converter (22) and provide an output voltage which matches the voltage temperature profile of the auxiliary battery. The converter functions as an inverter in which the switching devices (44, 46) alternately conduct current from the 360 volt battery (14) through the primary winding (70) of the transformer (68). This induces current through the secondary winding (72) which is rectified by the diodes (76, 78) and filtered by the inductor (80) and capacitor (82) to provide a regulated 12 volt DC output terminal (34).    ADVANTAGE -   Has voltage and temperature compensation to prevent overcharging, auxiliary battery is charged from high voltage propulsion battery    (EP914701-A1)      The auxiliary battery (30) circuit has a temperature compensation circuit (32) for a DC/DC converter (22) and has a voltage sensitive resistor (120), such as a thermistor, coupled to a clamped voltage divider network (126, 128). The voltage divider generates a resistance versus temperature characteristic so as to control the DC/DC converter (22) and provide an output voltage which matches the voltage temperature profile of the auxiliary battery. The converter functions as an inverter in which the switching devices (44, 46) alternately conduct current from the 360 volt battery (14) through the primary winding (70) of the transformer (68). This induces current through the secondary winding (72) which is rectified by the diodes (76, 78) and filtered by the inductor (80) and capacitor (82) to provide a regulated 12 volt DC output terminal (34).    ADVANTAGE -   Has voltage and temperature compensation to prevent overcharging, auxiliary battery is charged from high voltage propulsion battery