Title :
An interleaved dual-battery power supply for battery-operated electronics
Author :
Wu, Qing ; Qiu, Qinru ; Pedram, Massoud
Author_Institution :
Dept. of Electr. Eng. Syst., Univ. of Southern California, Los Angeles, CA, USA
Abstract :
After a detailed analysis and discussion of two important characteristics of today´s battery cells (i.e., their current-capacity and current-voltage curves), this paper describes the design principles and architecture of a dual-battery power supply system for portable electronics. The key idea is to integrate two battery types with different energy capacity and current rate curves into the power supply system, and then use them in an interleaved manner in response to varying current requirement of the VLSI circuit that is powered by this dual-battery system. Analytical and empirical results demonstrate the effectiveness of the new battery architecture in maximizing the service life of a battery system with fixed volume (or weight).
Keywords :
DC-DC power convertors; VLSI; portable instruments; power consumption; power supplies to apparatus; primary cells; VLSI circuit; battery cells; battery-operated electronics; current rate curves; current-capacity curves; current-voltage curves; discharge delay; effectiveness; energy capacity; fixed volume; fixed weight; interleaved dual-battery power supply; portable electronics; service life; varying current requirement; Batteries; Circuits; Consumer electronics; Design engineering; Electronic mail; Energy consumption; Power engineering and energy; Power supplies; Very large scale integration; Voltage;
Conference_Titel :
Design Automation Conference, 2000. Proceedings of the ASP-DAC 2000. Asia and South Pacific
Conference_Location :
Yokohama, Japan
Print_ISBN :
0-7803-5973-9
DOI :
10.1109/ASPDAC.2000.835130
