Improvement of Li-ion Battery Discharging Performance by Pulse and Sinusoidal Current Strategies

Author

Liang-Rui Chen ; Jin-Jia Chen ; Chun-Min Ho ; Shing-Lih Wu ; Deng-Tswen Shieh

Author_Institution

Dept. of Electr. Eng., Nat. Changhua Univ. of Educ., Changhua, Taiwan

Volume

60

Issue

12

fYear

2013

Firstpage

5620

Lastpage

5628

Abstract

In this paper, the ac impedance analysis is used to explore the optimal discharging frequency for a Li-ion battery. Experiments indicate that the optimal discharging frequency is at the minimum ac impedance frequency fZmin for a conventional pulse-current (PC) discharging. In addition, a sinusoidal current (SC) discharging strategy is also proposed to achieve better performances. This SC discharging strategy improves the discharging capacity, discharging efficiency, and rising temperature of the Li-ion battery by about 1.3%, 1.32%, and 41.9%, respectively, as compared with the traditional constant-current discharging.

Keywords

secondary cells; AC impedance analysis; constant current discharging; discharging capacity; discharging efficiency; optimal discharging frequency; pulse current discharging; secondary battery discharging performance; sinusoidal current discharging strategy; Batteries; Battery charge measurement; Discharges (electric); Impedance; Resistance; Temperature measurement; Time frequency analysis; Li-ion battery; minimum ac impedance; sinusoidal current (SC) discharging;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2012.2230599

Filename

6365309