Patent ID: 10333319

Abstract:
A hybrid system modifies a control algorithm such that the super-capacitor can not only supply pulsed power, but it now can also absorb pulsed power from the load while keeping the battery current constant such that the incoming pulsed power does not stress the battery. The absorbed energy is accumulated in the capacitor and then the control algorithm operates the DC/DC converter to recharge the battery with the energy from the capacitor at a rate that optimized battery performance. If the load supplies energy to the hybrid system such that the current into the battery is within its optimal operating range, then the load is permitted to directly charge the battery. This hybrid system keeps the battery current operating in its most efficient range during both discharging and charging (the discharging and charging currents may be different values) by using the super-capacitor to supply or absorb pulsed in energy that would otherwise stress the rechargeable battery and result in reduced battery cycle life and/or reduced effective capacity over time.