JUNG, et al, developed a battery monitor system (BMS) for a Ni-MH battery used in EV with several functions to optimize the control of charge and discharge of the battery status in real time. GRUJICIC, et al, presented a control scheme for polymer electrolyte membrane fuel cell (PEMFC) systems, which is critical to transient behaviour study of batteries with highly complex electrochemical changes. Many studies have been performed on BMS