NiMH Battery News & Industry Insights

Selecting and Sizing Sealed NiMH Backup for PSD Controls and AFC Gates: Cycle Energy, Fail-Safe Architecture and Chemistry Choice

2026-09-16

Selection and design of sealed NiMH backup for platform screen door local controls and AFC fare gates: emergency cycle and hold energy, pulse current, 24 V architecture, float charging, supervision and self-test, and comparison with VRLA, lithium and capacitor/mechanical fail-safe options.

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Doors That Must Fail Safe: The Power and Battery Duty Behind Metro Platform Screen Doors and AFC Fare Gates

2026-09-16

Working principle and power/battery duty of metro platform screen doors (PSD) and automatic fare-collection gates: controlled sliding doors and emergency egress, the fail-safe-open requirement on station power loss, the small sealed backup that powers defined open/close cycles and last-gasp logging, and ISO 18298 / EN 14752 context.

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Qualifying Onboard Train-Control Backup to EN 50155: Temperature, EN 61373 Vibration, EN 50121 EMC, EN 45545 Fire and the IEC 62973-4 Sealed NiMH Dossier

2026-09-16

Testing and certification roadmap for sealed NiMH onboard ETCS backup: EN 50155 temperature/supply and start-up tests, EN 61373 shock and vibration, EN 50121 EMC, EN 45545 fire, plus the IEC 62973-1/-4 railway battery, IEC 61951-2, IEC 62133-2 and UN 38.3 dossier and safety integration.

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Designing an EN 50155 Sealed NiMH Backup for ETCS Onboard Equipment: Bus Architecture, Cold-Start Margin and NiMH versus NiCd, Lead-Acid and Lithium

2026-09-16

Selection and design of sealed NiMH onboard backup for ETCS vital computers, BTM, DMI, JRU and GSM-R: bus and charger architecture across 24/48/72/110 V, ride-through and cold-start margin at -40 C, vibration and fire construction, supervision, and an honest chemistry comparison under IEC 62973.

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Powering the Driver's Last Authority: The Onboard ETCS / BTM / DMI / JRU / GSM-R Load Profile and Its Hold-Up Battery

2026-09-16

Working principle and load profile of onboard train-control backup power: the ETCS European Vital Computer, Balise Transmission Module, Driver-Machine Interface, Juridical Recording Unit and GSM-R radio; EN 50155 supply and temperature classes; and the hold-up/ride-through duty of the train battery and local backup.

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Qualifying a Signalling Backup Battery: EN 50129 Safety Evidence, EN 50121 EMC, EN 60068 Environment and the IEC 62973 / IEC 61951-2 / IEC 62133-2 / UN 38.3 Battery Dossier

2026-09-16

Testing and certification roadmap for wayside signalling backup power: EN 50126/50128/50129 safety case and SIL, EN 50121 EMC, EN 60068 and ingress/temperature environment, stationary battery safety, plus the IEC 61951-2, IEC 62133-2 and UN 38.3 sealed-NiMH evidence and how it enters the signalling safety file.

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Sizing a Sealed NiMH Wayside Signalling Battery: Autonomy Maths, Charger Architecture and an Honest Comparison with Vented NiCd, VRLA and Lithium

2026-09-16

Selection and design of sealed NiMH backup for LEUs, axle-counter evaluators and interlockings: autonomy and derating calculations, string voltage and charger/float architecture for long standby, pulse-load and low-temperature margins, supervision, and an honest comparison with vented NiCd, VRLA lead-acid and lithium-ion.

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When the Wayside Loses the Mains: The Battery Load Profile Behind Eurobalise LEUs, Axle Counters and Railway Interlockings

2026-09-16

Working principle and load profile of lineside signalling backup power: fixed versus controlled Eurobalises, the Lineside Electronic Unit (LEU), axle-counter evaluators, interlockings and level crossings, and why a controlled, finite-autonomy discharge must keep a safety-critical track section alive.

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