Maedeh Sadatgol Tabarestani

 

 

M. Sc.: Energy Engineering, K. N. Toosi University of Technology

 

B. Sc.: Mechanical Engineering, University of Hamedan

 

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M. Sc. Thesis

• Title: Modeling and Simulation of Electrochemical Impedance Spectroscopy in Lead-Acid Battery.
• Advisor: Dr. Farschad Torabi.
• Graduation Date: ? / ? / 2013
• Abstract
  The extensive depletion of nonrenewable energy sources has increased the consideration of the alternative energy sources. The battery as an alternative energy source attracts a lot of attention these days. The battery has been selected as an energy source in many industries such as automobile industry. However their life is shorter than the other equipment, and the cost of their construction, replacement, and operation makes the enhancement of battery life, very important. In recent years, several studies have been done on battery modeling as a key for discovering and improving their performance since the proper utilization is substantial due to their widespread application in many industries. The low price of the lead-acid batteries as well as their ability to supply high surge current make them one of the best options in different applications such as cars, ships, etc. There are several methods to investigate the performance of the batteries. In the present study, the analysis of lead-acid batteries by electrochemical impedance spectroscopy method is studied and discussed. It has assumed that the modeled lead acid battery is one-dimensional due to its small thickness. Also, there is no free electrolyte movement thus the velocity is zero. In this model the response data is obtained by applying a sinusoidal function to the model. The model is based on fundamental governing equations of battery dynamics which was solved using finite volume method by a C++ solver. Then response function was estimated by curve fitting over the results. Next, the impedance values were calculated by EIS techniques. Then the Nyquist and Bode curves were plotted. Finally, the equivalent circuit of this model was obtained by these curves. It has observed that the equivalent circuit model consists only one electrical resistance element. It can be concluded that the excitation and response functions have no phase difference with each other and it means this behavior is independent of frequency.

   

   

   

   

   

   

   

   

   

   

   

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