Design of Duty-Varied Voltage Pulse Charger for Improving Li-Ion Battery-Charging Response

• Published in: IEEE transactions on industrial electronics (1982) Vol. 56; no. 2; pp. 480 - 487
• Main Author: Chen, Liang-Rui
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-02-2009; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Batteries; Battery charger; Charge; Charge efficiency; Control systems; Dynamical systems; Electric potential; Electrical products; Fuzzy control; Genetic algorithms; Li-ion battery; Neural networks; Performance enhancement; Prototypes; pulse charge; Strategy; System performance; Voltage; Voltage pulses
• ISSN: 0278-0046; 1557-9948
• DOI: 10.1109/TIE.2008.2002725

In this paper, a duty-varied voltage pulse-charge strategy (DVVPCS), that can detect and dynamically track the suitable duty of the charge pulse, is proposed to improve the battery-charge performance. To assess the system performance, a prototype of the duty-varied voltage pulse charger (DVVPC) is designed and implemented. Comparing with the standard constant-current and constant-voltage (CC-CV) charge strategy, the charge speed of the proposed DVVPCS is improved by about 14%, while the proposed DVVPCS is improved by about 5% in comparison with the conventional duty-fixed voltage pulse-charge strategy (DFVPCS). The charge efficiency of the proposed DVVPC has been improved by about 3.4% as compared with that of the general CC-CV. In comparison with conventional DFVPCS with D = 50%, the charge efficiency of the proposed DVVPCS is improved by about 1.5%. The results indicate that the DVVPCS can actually provide pulse with suitable duty to charge the battery, and the charge performance is improved.