Anion exchange


membrane fuel cell test facility is at the core of hydrogen fuel cell system development


Hydrogen fuel cell test facility


AFC Energy has opened a dedicated anion exchange membrane (AEM) fuel cell test facility in Surrey. It represents an essential step in the company’s path to a pre-commercial prototype of its new, high-power density HydroX-Cell(S) fuel cell system, resulting from the development progress of its AlkaMem anion exchange membrane. The HydroX-Cell(S) fuel cell research facility will support the rapid work scheduled to meet


the company’s remaining development plans. Initial design work has concluded on the stack design for the “S” series AEM fuel cell and the final build of this unit will provide the set-up needed to validate the design criteria for the modular 10kW HydroX-Cell(S) fuel cell stack, a commercial scale product which will be released in late 2022. The work being undertaken will focus on enhancing membrane mechan-


ical strength, improving the performance and stability of the ionomer, producing consistent MEAs or tuning the preparation steps to enable a range of membrane thicknesses to be offered. According to Adam Bond of AFC Energy, the new AEM hy-


drogen fuel cell research facility reinforces the development of arguably the world’s most promising, low-cost, high en- ergy- dense fuel cell technology. “We continue to believe this platform will compete head-on with incumbent high energy-dense fuel cells in the market today,” he says.


Intelligent UPS keeps the power flowing for critical technology 2021 /// Test House Directory Extra \\\ 23


A new PXI/PXIe multiplexer module optimised for MIL-STD-1553 testing applications has been released. With a differential bandwidth of 450MHz, far exceeding the requirements of the standard, the module


Multiplexer module for MIL testing


is available in single or dual 4:1, 8:1 or 16:1 differential configurations. Using telecoms-grade electromechanical relays, the 40/42-739 multiplexer has a minimal initial signal path resistance of less than 450mΩ. The module features impedance-controlled differential pairs with a single-ended characteristic impedance of 39Ω and a differential impedance of 78Ω, within the specified range of 70-85Ω. Its compact, single-slot footprint with PXI or PXIe control interface provides flexibility in chassis selection and minimises chassis slot count.According to Steve Edwards of supplier Pickering Interfaces, this standard was intended for use in military aircraft but is now used as the basis for ground-based military vehicles, weapons systems, commercial aircraft and space applications. “The 40/42-739 has many applications in aerospace and military systems, and can potentially support applications for 75Ω switching, such as for video signals,” he says.


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