| Title |
A Study on the Phase Response of Secondary Battery to Inductive Load |
| Authors |
강대수(Dae-Soo Kang) ; 유정봉(Jeong-Bong You) |
| DOI |
https://doi.org/10.5573/ieie.2020.57.8.63 |
| Keywords |
Inductive element; Phase response; State of charge; State of health; Bode plot; Nyquist plot |
| Abstract |
It was proposed the use of an inducive element to measure the SOH of a secondary battery by phase response. As a result of simulating the Randles equivalent model of a secondary battery, the inductive element used as the load has a high response characteristic and increases the maximum phase response frequency band. In order to obtain the frequency band in which the phase response characteristic of the secondary battery is well observed, the phase response was measured with the change of the inductance value of the inductive element, 33, 49 inductive element with the maximum phase response at 631Hz was used. The phase response measurements for secondary battery with different SOH showed that the phase response for each 10(%) of SOH showed a difference of about 1.85(degree), enabling the SOH diagnosis of secondary battery by the phase measurement for the inductive element. |