fuel cell-final
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LOGOwww.themegallery.com
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Overview
Introduction
Innovation
Conclusion
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The power management system is proposed toshare load power between the PEM fuel cell and the Li-
Ion battery. The load power is divided into three states
such as the startup state, the charging state and the high
power state.
1 Introduction
The fuel cell air supply system controller is developed
based on the FC current decided by the power
management system. The optimum compressure power
which maximized the net power output of the FC system is
obtained as afunction of the fuel cell current.
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Innovation2
The hybrid system power control
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The hybrid system power control2
Power Management System (PMS): decidesthe operating power state of the hybrid power
system based on the algorithm developed for
hybrid power sharing.
Power Electronic Interface (PEI): the
implementation protocol of the power
management systems decisions through the
power converters.
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How many state
does the power
management
contain???
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Power management system2.1
Start-upState
ChargingState
High PowerState
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Power management system2.1
Start-upState
ChargingState
High Power
State
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Power management system2.1
Start-upState
ChargingState
High PowerState
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What does the
power electronic
interface
contain???
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Power electronic interface2.2
The Power Electronic Interface (PEI) makes acommon platform for the both power sources in order to
response the propulsion power demand.
PEI is consisted of:
UBC (unidirectional boost converter)
BDC (bidirectional converter)
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Operational principle2.3
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Air supply control system2.4
The PEMFC air supply system controller is developed to
achieve maximum net power out put from the fuel cell
system.
The relationship between the power gained Pnetand the
compressure pressure ratio P2/P1
n: the number of cells
i: the fuel cell current
C: a constant for the FC system
T: the cell temperature
c: efficiencies of the compressor
m: efficiencies of compressor motors
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Air supply control system2.4
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Air supply control system2.4
The optimum compressure power:
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Build the hybrid system control
Optimize power management and improve system
efficiency
During the start of the system, the battery powers the
load to ensure the FC cold starts easily.
Conclusion3
When the load steps up or down, as the FC can not
respond quickly, the battery will provide or absorb
the unbalanced energy, so the dynamic characteristicsof the whole system can be improved
The battery can provide peak power, so the power
rating of the FC can be decreased, reducing the total
cost.
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