True blue power TB17 Series, Руководство по установке и эксплуатации

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16 Manual Number 9018047 • Revision L, January 6, 2022
SECTION 4 OPERATION
4.1 DESCRIPTION
The True Blue Power TB17 Advanced Lithium-ion Battery is designed to supply power for starting
an aircraft engine and providing emergency backup power to aircraft systems in the event of
primary power generation loss. It utilizes rechargeable Nanophosphate lithium-ion cells to deliver
approximately 26.4 volts DC and 17 Ampere-hours (Ah) of capacity. It utilizes positive and
negative power terminals and supplies battery status and communication through a 7-pin circular
connector.
4.2 OPERATIONAL MODES
The TB17 operates in two modes. Sleep Mode reduces power consumption to conserve battery
capacity. When the TB17 is in sleep mode, the internal battery heaters are inactive,
communication signals are inactive, and the battery is not charging or discharging. The TB17 will
transition to Active Mode when it senses a charging voltage of 100mV ± 30mV greater than the
battery voltage or senses an external load greater than 35mA. The unit will recycle hourly and test
for these conditions in order to remain active or transition to Sleep Mode. Additionally, grounding
the heater enable switch (-2 and -4 units only) will also transition the battery into Active Mode.
Providing Aircraft Power
When the aircraft’s power generation systems are offline or fail, the unit will provide
immediate power to the equipment/loads on the associated power bus. As the unit’s
capacity is used, the voltage will begin to drop until the unit is fully depleted. A fully charged
unit will initially provide approximately 28 volts. Depending on the load, the TB17 battery
will provide an average of approximately 25.5 volts for the duration of discharge. In order to
avoid depleting the unit’s power and ensure availability for the next flight, be sure to turn off
all aircraft systems, lights and accessories after a flight. If the unit is depleted, see Section
5.2 Maintenance for charging instructions.
Discharge will be disabled once voltage drops below 20VDC. The battery will accept
charge current if the battery voltage is above 12.5VDC. If battery voltage drops below
12.5VDC, it must be returned to manufacturer for repair.