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Fuel Cell Vehicle Startup Power Management Strategy

IP.com Disclosure Number: IPCOM000248478D
Publication Date: 2016-Dec-06
Document File: 2 page(s) / 411K

Publishing Venue

The IP.com Prior Art Database

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 55% of the total text.

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Fuel Cell Vehicle Startup Power Management Strategy

Problem: FC Startup time is long since the system needs to heat up and guarantee 50% available power. (Freeze startup is also required)

FC Heat required: Basic method for FCS cold startup is to utilize any loads to heat the system. (catch 22 since needs a load to warm-up quick) This especially includes freeze startup and cold temperature operation.

One strategy uses the premise of utilizing any loads available to heat the fuel cell system including motor plugging, battery charging, and additional WEG heater components.

Time & efficiency(fuel economy)

The problem is this can take some time and limited loads are available. Startup performance is diminished and fuel economy is reduced during present startup process.

Solution: Develop and allow the vehicle to be driven at 50% total power level with immediate drive-away control strategy


1. FCS stack startup allows lower voltage and higher current if loads are available for warm-up


2. Use control startup strategy for immediate drive-away after basic fuel cell stack health check


3. FC Startup power flow projections shows that using driving load will achieve maximum warm-up

4 Allow immediate drive-away and monitor cell voltage and limit FC power if needed (continuous health check)


5. If FCS power available is less then 50% supplement with battery (if available) then utilize hybrid battery capacity for more load


• Reduces drive-away startup time (paradigm-shift)

• Improve fuel economy & optimizes start-up time
• Provides a larger load for fuel cell warm-up
• Gateway or bridge to start/stop functionality
• Complimentary with FC slew rate variation
• Torque limiting factor during initial acceleration vs power

Fuel Cell Vehicle Startup Power Management Strategy

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FCV Startup Power Management Strategy

Disclosed Anonymously (5...