Design and demonstration of an extended range hydrogen fuel cell utility vehicle

Hearn, C.S.; Lewis, Michael; Thompson, Robert T.; Chen, D.; Hanlm, J.; Zuckerman, David S.; Lindsay, Tobias

doi:10.1109/vppc.2011.6043025

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…Meanwhile, a detailed explanation of the curve is given in Reference [35]. The forklift consists of an inverter, drive motor, and hydraulic motor.…”

Section: Analysis Of Voltage Drop Characteristics Of the Fuel Cell Symentioning

confidence: 99%

“…Meanwhile, a detailed explanation of the curve is given in Reference [35]. The output voltage of the fuel cell, v out , can be described by subtracting the voltage drop, ∆v drop , from the OCV, V OCV , in Equation (1).…”

Section: Analysis Of Voltage Drop Characteristics Of the Fuel Cell Symentioning

confidence: 99%

“…For this reason, hydrogen recirculation, with high hydrogen utilization, has been widely used recently. Hydrogen recirculation is highly fuel efficient, because it recycles discharged hydrogen that has not reacted during the reaction process of oxygen and hydrogen [35].…”

Section: Introductionmentioning

confidence: 99%

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Improved Voltage Drop Compensation Method for Hybrid Fuel Cell Battery System

et al. 2018

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In this paper, a voltage drop compensation method for hybrid hydrogen fuel cell battery system, with a hydrogen recirculation powering a forklift, is studied. During recirculating hydrogen fuel to recycle hydrogen that has not reacted enough at the system, impurities can be mixed with the hydrogen fuel. This leads to low hydrogen concentration and a drop in the output voltage of the fuel cell system. In excessive voltage drop, the fuel cell system can be shutdown. This paper proposes a voltage drop compensation method using an electrical control algorithm to prevent system shutdown by reducing voltage drop. Technically, voltage drop is typically caused by three kinds of factors: (1) The amount of pure hydrogen supply; (2) the temperature of fuel cell stacks; and (3) the current density to catalysts of the fuel cell. The proposed compensation method detects voltage drop caused by those factors, and generates compensation signals for a controller of a DC–DC converter connecting to the output of the fuel cell stack; thus, the voltage drop is reduced by decreasing output current. At the time, insufficient output current to a load is supplied from the batteries. In this paper, voltage drop caused by the abovementioned three factors is analyzed, and the operating principle of the proposed compensation method is specified. To verify this operation and the feasibility of the proposed method, experiments are conducted by applying it to a 10 kW hybrid fuel cell battery system for a forklift.

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“…Meanwhile, a detailed explanation of the curve is given in Reference [35]. The forklift consists of an inverter, drive motor, and hydraulic motor.…”

Section: Analysis Of Voltage Drop Characteristics Of the Fuel Cell Symentioning

confidence: 99%

Section: Analysis Of Voltage Drop Characteristics Of the Fuel Cell Symentioning

confidence: 99%

See 1 more Smart Citation

Improved Voltage Drop Compensation Method for Hybrid Fuel Cell Battery System

et al. 2018

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“…However, lithium-ion batteries and lead-acid batteries also have problems such as short run time, long charging time, and unstable working efficiencies [ 5 ], etc. By contrast, proton exchange membrane fuel cells (PEMFCs) could combine the advantages of both a charging battery and internal combustion engine, whose stable operation at full power, short refueling time, green by-product (water), quiet working environment, and low-temperature operational capability make it an ideal power source for high-performance electric forklifts [ 6 , 7 , 8 , 9 ]. PEMFCs are considered to be the best alternative when replacing the diesel internal combustion engine, especially in heavy vehicles where a battery system would be complicated and cumbersome (e.g., trucks and engineering machinery vehicle) [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Work Efficiency and Economic Efficiency of Actual Driving Test of Proton Exchange Membrane Fuel Cell Forklift

Xiong

Zhou

et al. 2022

Molecules

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A 3.5 tonne forklift containing proton exchange membrane fuel cells (PEMFCs) and lithium-ion batteries was manufactured and tested in a real factory. The work efficiency and economic applicability of the PEMFC forklift were compared with that of a lithium-ion battery-powered forklift. The results showed that the back-pressure of air was closely related to the power density of the stack, whose stability could be improved by a reasonable control strategy and membrane electrode assemblies (MEAs) with high consistency. The PEMFC powered forklift displayed 40.6% higher work efficiency than the lithium-ion battery-powered forklift. Its lower use-cost compared to internal engine-powered forklifts, is beneficial to the commercialization of this product.

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