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    Development a power management unit for small direct borohydride fuel cell - Li-ion battery hybrid system
    (2013) Sanli, Ayse Elif; Günlü, Göksel; Aytaç, Aylin
    In this study, a small portable borohydride fuel cell/Li-ion battery hybrid system has been developed. The system consists of a single portable direct borohydride/peroxide fuel cell (DBPFC), Li-ion battery and power management unit (PMU). The battery has been used as a primary power sources and discharged at constant load. When its state of charge has reduced, the DBPFC has charged the battery and has powered the load simultaneously. A DC-DC Boost converter has been used as a PMU. The DBPFC has generated the energy of 20.7 mWh while Li-ion battery has consumed the energy of 5.9 mWh. Total efficiency of the DBPFC-Li-ion battery hybrid system has been calculated as 28.5%. © The Electrochemical Society. © 2013 Elsevier B.V., All rights reserved.
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    Investigation of the vehicle application of fuel cell-battery hybrid systems
    (Springer International Publishing, 2016) Sanli, Ayse Elif; Günlü, Göksel
    All electric vehicles (AEV) are developed using the new technology; they can be separated in two groups as battery-operated electric vehicles (EV) and fuel cell vehicles (FCV). The subject of this study, fuel cell-battery operated hybrid vehicles, is about full electric hybrid vehicles (FEHV). EV and FCV have different advantages and disadvantages, therefore it is necessary to develop the FEHV vehicles. The fuel cell-battery hybrid systems are under investigation. In the literature, some automotive applications are reported as examples for fuel cell-battery hybrid powered systems. The light hybrid vehicles have been tested in terms of the system design, power management, road tests, and efficiency. All of the presented systems consist of a proton exchange membrane fuel cell system, battery pack, powertrain system, and a connection strategy for powering the traction of an electrical car. However, these are not perfect vehicles, they require further work to address major drawbacks with the connection as well, to increase the efficiency and management of the hybrid components (fuel cell, battery, supercapacitors, motor drive, and electrical systems), motor drive and electrical systems. Their tests and the demonstration results are satisfactory. © 2017 Elsevier B.V., All rights reserved.