Patent ID: 7495413
Filing Date: 2009-02-24
Classification: A61N,H01M,Y02E

Abstract:
1. A power supply system for an external defibrillator having an operating mode and an alternate mode, the power supply system comprising: an external defibrillator having a main unit circuit and a battery pack circuit, the main unit circuit and battery pack circuit cooperating to deliver energy to a patient and the battery pack circuit for providing functions of the external defibrillator other than delivering energy to the patient, a first power supply comprising a first battery, the first power supply providing electrical power to the main unit circuit and the battery pack circuit; a main power switch interposed between the first power supply and both of the main unit circuit and the battery pack circuit, the main power switch having a first state and a second state, the main power switch in the first state allowing the electrical power to flow from the first power supply to the main unit circuit and the battery pack circuit during the operating mode and in the second state preventing the electrical power from flowing from the first power supply to the main unit circuit and the battery pack circuit during the alternate mode, the main power switch alternatable between the first and second states; and a second power supply comprising a second battery, the second power supply and the first power supply being connected by circuitry, the circuitry and main power switch cooperating such that when the main power switch is in the second state, the second power supply provides electrical power to the battery pack circuit and the circuitry isolates the second power supply from the main unit circuit, and when the main power switch is in the first state, the circuitry isolates the second power supply from the battery pack circuit and the main unit circuit.