Intelligent Energy has led a consortium to introduce zero

emission fuel cell electric taxis to London. The consortium

developed and integrated robust, high efficiency, Proton

Exchange Membrane (PEM) fuel cell electric powertrains into

TX4 taxis from The London Taxi Company.

The zero emissions London taxi is a hydrogen fuel cell and

lithium battery powered electric hybrid providing a 250-mile

driving range, whilst retaining all the passenger and luggage

space of a conventional London taxi.

Fuel Cell Electric London Taxi Case Study

Designed with taxi drivers in mind, the fuel cell electric

London taxi is capable of a full day’s operation (8 hours)

and can be rapidly refulled, in less than 5 minutes. The taxi

also benefits from zero road tax, an advantage of emitting

zero CO₂ and zero particulates.

With no moving parts in the fuel cell and with electric

motors driving the wheels, ride comfort and reliability are

improved compared with conventional taxis.

The fuel cell electric London taxis are now featuring in the

HyTEC programme and running in a London fleet from

July 2012.

Case study Fuel cell power systems

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Fuel cell system specification ENV-ME 30kW

Performance Rated net power output 30kW

Output voltage 200 to 400V (unregulated)

Rated current 150A

Emissions Water vapour

Fuel Fuel type Hydrogen gas

Fuel quality 99.95% (subject to composition)

Supply pressure 3 to 7 bar gauge

Fuel consumption ≤345 SLPM (at maximum rated power)

Fuel storage External

Environmental Storage temperature -25°C to 60°C

Operational temperature -25°C to 37°C

Relative humidity 0% to 95%

Elevation 0 to 1000 metres

Physical Mass 170 kg

Volume 177 litres

Fuel cell hybrid taxi specification

Powertrain Fuel cell and high voltage battery hybrid

coupled to electric motor

Power 100kW

Torque 550Nm

Fuel Compressed hydrogen @ 35MPa

(70MPa option available)

Top speed 93mph

0 to 60mph 15.5 seconds

Range Up to 250 miles (165 miles on NEDC)

CO2 emissions 0 g/km

For more information please visit: www.intelligent-energy.com

Key benefits of fuel cell systems

• Zerotailpipeemissions

• Significantlyincreasedrangecompared

to a battery only alternative

• Rapidrefuelling(typically<5minutes)

• Quietoperation

• Overallimprovedpassengercomfort

• Highsystemefficiency

• Continuoussystemhealthmonitoring

and predictive servicing

• CANcontrolinterface

• Lowcostandcompactdesignfuelcell

stack with metallic plates

• Reducedstacksizeincorporating

proprietary stack cooling and

humidification (no cooling plate)

• Reducedbalanceofplantcomponents

with no requirement for pre-stack

humidification

• No“sciencebreakthrough”requiredto

realise planned cost reduction curves

• Transferablepowertraintechnology

suitable for a variety of automotive and

other applications

The Intelligent Energy name, any products referenced here in, and the logo are trademarks or registered trademarks of Intelligent Energy Ltd. Copyright © and Database right of Intelligent Energy Limited 2012. DISCLAIMER The information contained in this document is subject to change and only intended as a guide and does not include all details which may be relevant to particular circumstances. Accordingly it should not be regarded as being a complete source of information. Printed July 2012. Registered Office: Charnwood Building, Holywell Park, Ashby Road, Loughborough LE11 3GB. Registered number: 03958217 011M072012KP

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