BOOSTING/CHARGING DEVICE WITH RAPID CHARGING FROM A BOOSTER BATTERY FOR A MOTOR VEHICLE BATTERY AND THE CHARGING METHOD

摘要

The invention relates to a boosting/charging device that comprises a booster-type power stage (3) having an inductor and a controlled switch. Said stage is disposed between the batteries (1 and 2) and comprises a diode (8), a switching transistor (7) and first means (9, 11) which are used to detect the current stored in the inductor. The on/off cycles of said transistor (7) are controlled from second means (13, 14) that consist of a time delay stage which is intended to ensure that the cut-off time of the transistor (7) is constant.