Sinusoidal-Ripple-Current Charging Strategy and Optimal Charging Frequency Study for Li-Ion Batteries

Author

Chen, Liang-Rui ; Wu, Shing-Lih ; Shieh, Deng-Tswen ; Chen, Tsair-Rong

Author_Institution

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

Volume

60

Issue

1

fYear

2013

Firstpage

88

Lastpage

97

Abstract

In this paper, the sinusoidal-ripple-current (SRC) charging strategy for a Li-ion battery is proposed. The ac-impedance analysis is used to explore the optimal charging frequency. Experiments indicate that the optimal charging performance can be achieved by the proposed SRC with the minimum-ac-impedance frequency fZmin. Compared with the conventional constant-current constant-voltage charging strategy, the charging time, the charging efficiency, the maximum rising temperature, and the lifetime of the Li-ion battery are improved by about 17%, 1.9%, 45.8%, and 16.1%, respectively.

Keywords

electric impedance; secondary cells; Li-ion battery; SRC charging strategy; charging efficiency; charging time; constant-current constant-voltage charging strategy; maximum rising temperature; minimum-ac-impedance frequency; optimal charging frequency; sinusoidal-ripple-current charging strategy; Batteries; Battery charge measurement; Frequency measurement; Impedance; Integrated circuit modeling; Probes; Resistance; Li-ion battery; minimum ac impedance; sinusoidal ripple current (SRC);

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2012.2186106

Filename

6140959