Patent ID: 6333570
Filing Date: 2001-12-25
Classification: H02J

Abstract:
A power supply system, the system comprising:a first battery connected to a first line at a first voltage relative to ground;a second battery connected to a second line at a second voltage relative to ground;a load device having a third line adapted to be connected to one of the first and second lines and having a fourth line adapted to be connected to ground; anda set of diodes associated with the load device, the set of diodes including:a first diode permitting current flow from the first line to the third line when the first voltage is greater than the second voltage;a second diode permitting current flow from the second line to the third line when the second voltage is greater than the first voltage;a third diode permitting current flow from the fourth line to the second line when i) the first voltage is greater than the second voltage and ii) the fourth line is disconnected from ground; anda fourth diode permitting current flow from the fourth line to the first line when i) the second voltage is greater than the first voltage and ii) the fourth line is disconnected from ground.