Fahad AliSyed Mohsin AliAbdul Aziz BhattiMashood Nasir2012-11-012012-11-012012Paper presented in Symposium on Hydrogen and Fuel Cells SHFC, 9th - 11th July 2012, Islamabad - Pakistanhttps://escholar.umt.edu.pk/handle/123456789/626This paper presents the implementation of a digitally controlled hybrid power source system, composed of fuel cell and battery. Use of individual fuel cell stacks as a power source, encounters many problems in achieving the desired load characteristics. A battery integrated, digitally controlled hybrid system is proposed for high pulse requirements. The proposed hybrid power source fulfils these peak demands with efficient flow of energy as compared to individual operations of fuel cell or battery system. A dc/dc converter is applied which provides an optimal control of power flow among fuel cell, battery and load. The proposed system efficiently overcomes the electrochemical constraints like over current, battery leakage current, and over and under voltage dips. By formulation of an intelligent algorithm and incorporating a digital technology (AVR Microcontroller), an efficient control is achieved over fuel cell current limit, battery charge, voltage and current. The hybrid power source is tested and analyzed by carrying out simulations using MATLAB simulink. Along with the attainment of desired complex load profiles, the proposed design can also be used for power enhancement and optimization for different capacities.enFuel cellHybrid Power SourceEnergy Storage ManagementEnergyOther