Patent ID: 6100663
Filing Date: 2000-08-08
Classification: B60L,H02J,Y02T

Abstract:
A battery charger for a rechargeable battery having one or more cells, the charger inductively transferring power from at least one inductive conductor energized at a high frequency, the charger comprising:a resonant inductive pickup unit providing to the battery a charging current that is inductively transferred from the at least one inductive conductor to whom said pickup unit is coupled, said pickup unit comprising a first control inductor and a second power-handling inductor, a resonating capacitor, and a rectifier;said first and second inductors being inductively coupled with each other so that when said first inductor is short circuited said second inductor is substantially decoupled from the at least one inductive conductor;said pickup unit further comprising a shorting switch varying the coupling between the at least one inductive conductor and said pickup unit by shorting said first inductor to control an amount of energy circulating in said pickup unit and an amount of current passed to the battery.