Patent ID: 7523321
Filing Date: 2009-04-21
Classification: G06F

Abstract:
1. An information handling system (IHS) comprising: a system board including a processor; a first battery for supplying power to the system board; a second battery for supplying power to the system board; and a switching circuit coupled to the first battery, the second battery and the system board, for repeatedly switching between the first battery and the second battery for supplying power to the system board, the switching circuit receiving only one input from the first battery and only one input from the second battery, each battery supplying a peak amount of current for periods of time during which the switching circuit has connected one of the batteries for supplying current while, in the aggregate, the batteries maintain a continuous supply of peak current to the system; a first diode coupled in series with the first battery, the switching circuit, and the system board, wherein the first diode is located between the switching circuit and the system board, and wherein the first diode prevents reverse flow current from the second battery to the first battery while the second battery is supplying power to the system board; and a second diode coupled in series with the second battery, the switching circuit, and the system board, wherein the second diode is located between the switching circuit and the system board, and wherein the second diode prevents reverse flow current from the first battery to the second battery while the first battery is supplying power to the system board; wherein at no time during operation are both the first and second batteries connected for supplying current; wherein the switching circuit connects the first battery to supply power to the system board during first periods of time alternating with second periods of time during which the switching circuit connects the second battery to supply power to the system board; and wherein the first time periods are equal in duration to the second time periods.