Patent ID: 6037756
Filing Date: 2000-03-14
Classification: H01M,H02J,Y02E

Abstract:
A power supply with mixed mode batteries for supplying power to a load, said power supply comprising:a DC to DC converter including a transistor having a base driven by a square wave signal for providing a DC voltage converting capability;a high energy capacity battery module connected to said DC to DC converter via a first switch for selectively providing power to said load;a high energy power battery module connected to said DC to DC converter via a second switch for selectively providing power to said load;a first charger having an input connected to said high energy capacity battery module via a third switch and an output connected to said high energy power battery module via a forth switch for selectively enabling said high energy capacity battery module to charge said high energy power battery module; anda controller for performing switching operations on said first, second, third and fourth switches based on operation conditions of said square wave signal, said high energy capacity battery module, said high energy power battery module and said load, whereby said high energy power battery module can be charged during the off period of said square wave.