Title :
A design of a digital frequency-locked battery charger for Li-ion batteries
Author :
Liang-Rui Chen ; Chou, Chung-Ping ; Han, Gia-Yo ; Chang, Hung-Chang ; Lin, Yi-De
Author_Institution :
Dept. of Aeronaut. Eng., Nat. Formosa Univ., Taiwan
Abstract :
In this paper, a digital frequency-locked battery charger (DFLBC) for Li-ion battery is proposed. The circuit topology of the proposed DFLBC is same as that of the phase/frequency-locked loop, which means that the proposed DFLBC has lots of inherently abilities as those of phase/frequency-locked loops, such as auto-tracking, auto-locking, and high accuracy. Using the above-mentioned abilities, a complete charging process, consisting of three sub-processes: bulk current charge process, variable current charge process and float charge process can be inherently implemented. In the proposed DFLBC, the charge trajectory can be digitally programmed according to the behaviors of the Li-ion battery to achieve a better charge performance. Experimental results show that the charge speed of the proposed DFLBC compared with that of a typical frequency-locked battery charger (FLBC) is improved about 16%.
Keywords :
battery chargers; digital phase locked loops; frequency locked loops; lithium; network topology; secondary cells; Li; bulk current charge process; circuit topology; digital frequency-locked battery charger; float charge process; lithium-ion batteries; phase-locked loop; variable current charge process; Aerospace engineering; Batteries; Circuit topology; Control systems; Disaster management; Educational institutions; Frequency locked loops; Mobile communication; Phase locked loops; Voltage;
Conference_Titel :
Industrial Electronics, 2005. ISIE 2005. Proceedings of the IEEE International Symposium on
Conference_Location :
Dubrovnik, Croatia
Print_ISBN :
0-7803-8738-4
DOI :
10.1109/ISIE.2005.1529076
