The BAT-NiMh45 creates a UPS system by plugging directly into the bottom of the HESC (including the V5SC-SER & HPSC) Vehicle Power Supplies. Each BAT-NiMh45 includes seven 4.5Ahr «A» size batteries for a nominal backup voltage of 8.4 volts. The BAT-NiMh45 can therefore supply a total of 37.8 watt-hrs of backup power and supply backup power for up to sixty minutes for a 37.8 watt load.
The BAT-NiMh45 includes Mosfet transistors for preventing deep discharge occurrences during extended power outages. The Mosfet transistors electrically isolate the BAT-NiMh45 from the HESC whenever the BE output of the HESC is de-asserted (pulled to 5V).
When ordered with the Real Time Clock option, the BAT-NiMh45-RTC can «awaken» from Sleep Mode at a programmed start-up time. A momentary «dry» contact on CN3 can also override the Sleep Mode and awaken the BAT-NiMh45-RTC. Tri-M Power supplies supporting the HESC-UPS18 firmware can program and read the RTC on the BAT-NiMh45-RTC. Tri-M Power Supplies with HESC-UPS firmware can use the BAT-NiMh45 for a UPS system, but without RTC support. Refer to section «Configuration and Installation» for listing of compatible power supplies and firmware support.
The BAT-NiMh45 has both a thermal fuse and a current fuse for protection against overcharging, and shorts on the battery output.
A digital I2C temperature sensor provides temperature feedback for charge termination, which can be read by the HESC.
Technical specifications | |
Batteries | NiMh, Size A, 4.5A-Hr |
Nominal battery voltage | 8.4V (seven cells x 1.2V) |
Maximum capacity | 37.8 watt-hours |
Charging current | 4.0A maximum |
Charging voltage | 19.5V maximum |
Backup time | Up to 60min for 37.8W load |
Protection fuses |
High temperature fuse activates at 84°C High current fusing activates at 14A |
Dimensions | PC/104 footprint size: 90mm x 96mm (3.55” x 3.775”), no PC/104 bus |
Weight | 220g (7.8oz) |
Environmental and physical specifications |
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Operating temperature | 0°C to +40°C (32°F to 104°F) (charge) -10°C to +65°C (14°F to 149°F) (discharge) |
MTBF | 540,876 Hours (Calculated) |
Model | Description |
BAT‑NIMH45‑PBF | PC/104 size, NiMh battery pack, 4.5Ah |