Indonesian Journal of Electrical Engineering and Computer Science Vol. 23, No. 1, July 2021, pp. 63~74 ISSN: 2502-4752, DOI: 10.11591/ijeecs.v23.i1.pp63-74  63 Journal homepage: http://ijeecs.iaescore.com Experimental design for an enhanced parametric modeling of supercapacitor equivalent circuit model Ali Mohsen Alsabari, M.K Hassan, Azura CS , Ribhan Zafira Department of Electrical and Electronic Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia Article Info ABSTRACT Article history: Received Mar 22, 2021 Revised Jun 9, 2021 Accepted Jun 15, 2021 The modelling of the supercapacitor (SC) plays an important role for the industrial application with many model representations such as electrical, chemical, and electrochemical models. Among one of those models are the equivalent circuit model which has been used to describe the real-time (charging/discharging) operation characteristics of the SC. Apart of its mathematical complexity, the time-consuming experimentally is also a real challenge for obtaining the internal parameters values for the SC. Choices of test equipment with a structure design of experiment also play important criteria affect the accuracy of the model. This research emphasis on a structured of experimental design for SC modelling by using neware battery tester. The experimental exercise to attain internal parameters of the SC are described and discussed in the paper. The findings were benchmarked with an empirical model of previous researchers. The terminal voltage of SC was validated via experiment with maximum relative error of 0.045%. The model successfully reproduce the SC dynamic behavior during the charge/discharge phase which indicates the proposed method and model accuracy. Keywords: Charge/discharge behaviour Internal resistance Neware BTS4000 Parametric modeling Supercapacitor Terminal voltage This is an open access article under the CC BY-SA license. Corresponding Author: M.K. Hassan Department of Electrical and Electronic Engineering Universiti Putra Malaysia Serdang, Selangor, 43300 Malaysia Email: khair@upm.edu.my 1. INTRODUCTION Many research cases are carrying out to discover a new sustainable power source answers for conventional power sources in various industrial applications. The energy storage systems (ESS) is considered one of those arrangements as sustainable power sources [1]-[3]. Supercapacitor is one of the main components in ESS which have the attributes of highpower density, long life span whichcan be charged and released in a couple of seconds [4]-[6]. One of the advanced power components in such a capacitor is the electric double-layer capacitors (EDLC) which stores the eneregy by thousands times compared with typical regular capacitor [7]. It comprises of two equal plates that have positive and negative charges isolated by protector as appeared in Figure 1 [8]. Fundamentally, SCs store electrical energy through the development of the double layer capacitor structure at the interface between the anodes and the electrolyte [9]. The uses of supercapacitor can be varied between electric vehicles (EVs), solar/wind power applications remote sensor nodes and hybrid electrical vehicles [10]. Supercapacitors have an essentially lower energy density and higher power density when compared with traditional batteries [11]. Combination of thebattery and supercapacitor has integral characteristics and gives an astounding arrangement that can cover a wide scope of intensity and vitality necessities [12].