METHOD AND DEVICE FOR ENERGY HARVESTING AND CHARGING RECHARGEABLE ENERGY STORAGE DEVICES

A method for energy harvesting and charging energy storage devices is provided. The method uses a voltage converter system and includes the steps of monitoring a parameter Vindicative of a charging level of a first rechargeable storage device and of maintaining this parameter Vbetween a lower and an upper threshold value. The method further includes steps of charging a second rechargeable storage device and operating the voltage converter system for transferring charges from the second to the first rechargeable storage device. An integrated circuit for energy harvesting is provided in which a terminal connectable with a second rechargeable storage device is switchably coupled to both the input and the output of the voltage converter system.