High-Frequency Analysis Modeling of Hybrid Vehicle Battery

Abstract

-In order to present that the electromagnetic compatibility standards following the frequency goes up which is based automotive electronics, in this paper, a hybrid/electric vehicle battery which reflects the frequency of the equivalent circuit model is introduced. By using this circuit modeling, the impedance characteristics can be analysed and an analyze of battery one cell is finished. Using this model, each different from the discharging situation, the discharge characteristic curve could be led. Basic theoretical approaches and measuring results through MATLAB and experimental validation of the EIS measurement equipment was used.

Analysis of Motor Driving Circuit in EV/HEV with Battery Circuit Model Employed

“…[8] Using the above-developed battery model, the impedance of the battery at 15 kHz can be estimated, of course, and this battery impedance is shown to be real number dominated, neglecting the imaginary number. [4] When we design a filter in this paper, therefore, we consider the real part of the battery impedance at the frequency of 15 kHz, and use the image parameter methods to design a low pass filter. Taking R0 as the real part of the battery impedance, L and C in the low pass filter can be obtained as [9]:…”

“…as inFig. 1and equation(1) [4]. One needs to measure the discharge voltage vs. DOD at different current levels to extract the constants in the open circuit voltage equation, which consist of two sections:…”