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The Nexa® Power Module from our partner Ballard Power Systems is one of the most widely sold fuel cell systems in this power class. The reliable operation, good price-performance ratio and extensive accessories enable easy integration and safe operation of the system.
The Fuel Cell System
 Rated voltage: 26 V- Rated current: 46 A
- Rated output: 1200 W
- Output voltage: 22…50 V
- Hydrogen purity: 99.99 % H2 (vol)
- Input pressure: 0.7… 17 bar
- Hydrogen consumption: max. 18.5 SL/min (at 0 °C / 32 °F, 1013 bar)
 When hydrogen is supplied, the 1200 W fuel cell system delivers uncontrolled DC voltage. The fans, pumps, valves, control and monitoring electronics are integrated components of the Nexa® Power Module. The included software, the starter kit and the documentation in English make the system a complete test and integration platform.
The software provides you with more than 20 relevant data items on the operating behavior of the fuel cell system and offers the option of data recording. The integrated EEPROM stores information on the running time and operating cycles, and also contains a fault recorder.
The starter kit includes additional components to facilitate start-up of the system: hydrogen supply line, lab basin, load relay, interface converter (RS485-RS232) and connecting cables.
The documentation provides an introduction to the subjects of hydrogen generation, hydrogen storage, hydrogen safety and, of course, fuel cell technology.
Please refer to the product data sheet for more information or contact us directly.
The Integration Accesories
 DC Converter with Load Regulator
With the DC converter that was especially developed for the Nexa® Power Module and the included battery set, a fuel cell hybrid system can be set up very quickly.
The DC converter converts the unregulated voltage of the fuel cell into a regulated rated voltage of 24 V.
The batteries can easily be charged via the integrated charging function of the DC converter. The included software provides information on the battery charging cycles and allows adjustment of battery charging parameters for specific applications.
The DC converter and the Nexa® Power Module can be switched on and off via an external control and communication panel, which also displays operating parameters for both components. The fuel cell system starts the automatic charging function for recharging the batteries when the charge drops below a configurable voltage level.
Technical Data
DC Converter
- Rated voltage: 24 V
- DCOutput voltage: 22… 30 V
- DCOutput current: max. 55 A
- Output power: max. 1200 W
- Efficiency: 96 %
- Recirculation protection, short-circuit tested
Battery Set
- Rated voltage: 24 V (2 x 12 V)
- Capacity: 18 Ah
 NEW 2008 - Drive Set
The drive set allows you to expand the fuel cell hybrid system, consisting of the Nexa® Power Module and the DC converter, into a fuel cell drive system. The drive set consists of a robust motor controller with pulse width modulation, an efficient, low-maintenance DC disk rotor motor, an accelerator pedal and a reversing contactor, in addition to the required electrical connections.
The components are optimized so that they can easily be assembled to form an integrated drive system.
Technical Data
Motor Controller
- Rated voltage: 24…36 V
- Current (max. 2 min): 275 A
- Current (max. 5 min): 200 A
- Current (max. 1h): 125 A
- Frequency range = 15 kHz
- Power consumption in standby mode: < 20 mA
Accelerator Pedal
- Resistance range: 0…5 k?
- Number of limit switches: 2
Motor
- Voltage ranger = 12 – 72 V
- Ratings with 24 V operating voltage
- Rated current: 110 A
- Short-term operation: 200 A
- Rated output: 2.2 kW
- Rated speed: 1,080 RPM
- Torque: max. 38 Nm
- Operating mode: S1
Reversing Contractor
- Rated voltage: 24 V
- Rated current: 100 A
- Voltage drop (at 100 A) 40 mV
- Coil voltage: 24 V
- Coil output 7…13 W
- Contact pick-up voltage (at 20 °C): 16 V
- Contact release voltage: 2.4…4.8 V
 Electronic Load
For setting constant current, resistance and output values. Enables convenient manual and computer-assisted recording of characteristic curves.
Technical Data
- Load voltage: 1..75 V DC
- Load current: 1..100 A
- Output: max. 1,500 W
- Voltage supply: 115/230 V (50/60 Hz)
- Integrated current and voltage measuring;
- Integrated IEEE488.2/RS232 interface incl. LabView VI driver
- 19" housing for rack systems
 Resistance Load
Economical version for simulation of electric consumers and for recording characteristic curves.
Technical Data
- Load voltage: max. 50 VDC
- Load current: 0.3...55 A
- Output: max. 1,650 W
- 19" housing for rack systems
 Inverter
The inverter converts the 24 V DC voltage from the DC converter into the voltage of 230 V AC needed for conventional consumers.
Technical Data
- Output voltage: 120/230 VAC (50/60 Hz)
- Output sine: pure sine; < 3 % THD
- Rated output: 1,500 W
- Output (short-duration): 2,000 W
- Input voltage: 21…30 VDC
- Efficiency: 91/93 %
 AC Adapter
If you do not use a battery, the AC adapter provides the power necessary for startup and shutdown of the Nexa® Power Module.
Technical Data
- Output voltage: 24 V (-10/+20 %)
- Output current: 5.2 A (+7 %)
- Output power: 150 W
- Input voltage: 90…264 V (60/50 Hz)
 Protective Diode
The protective diode protects the fuel cell from any load-specific reverse currents.
Technical Data
- On-state current: 70 A
- Reverse voltage: 200 V
 Connecting Set for Compressed Gas Cylinders
1-stage pressure reducer for connection of standard compressed hydrogen cylinders to the Nexa® Power Module.
Technical Data
- Inlet pressure: max. 200 bar
- Outlet pressure: 0… 15 bar
Further versions for supply of the system with hydrogen can be found under Hydrogen Generation and Storage or feel free to contact us. We will be glad to find the optimum solution for you.
 Areas of Application
The Nexa® system solution is ideal for projects at universities and institutes, both for individual breadboard assemblies and for application projects. Industrial enterprises who wish to set up initial product samples can also use the Nexa® Power Module as an excellent reference system. Primary applications are in the field of drive systems (e. g., boats, light vehicles, APUs) and stationary power supplies (e. g., UPS, autonomous power supplies).
Benefits of the System Solution
- One of the most widely sold fuel cell systems
- Easy installation and operation
- Extensive system and integration program for integration of applications
- Stringent quality and safety standards
- Extensive documentation
Possible Applications
Numerous applications and projects have been implemented by and with customers using the Nexa® Power Module. Here is a selection of projects that have been implemented with system solutions:
- Construction of 20 lightweight vehicles as part of a university competition. Also used frequently during the well-known Shell Eco Marathon.
- On-board power supply for the Cape Arkona railway – a tourist transport vehicle in Mecklenburg-Vorpommern.
Nexa and Ballard are registered trademarks of Ballard Power Systems Inc. and are used under license by Heliocentris. |
