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Caution
Following example shows the life calculation of the back-up battery used in assumed ro-
bot operation.
2000[mAh] of battery capacity is used for calculation.
Note that the following value is not a guaranteed value, but only represents a calculated
value.
The values below were calculated with only the current consumption factored in. The cal-
culations do not factor in electrolyte leakage and other forms of battery deterioration.
Life time may be shortened depending on ambient condition.
1) 2 cycles/day
Annual consumption capacity =
(10h × a + 0.0014h × b + 2h × c) × 2 × 313 days + 24h × c × 52 days =
172.7[mAh] )
Battery life = 2000[mAh]/172.7[mAh/year] = 11.6 (11.581) [year]
2) 1 cycle/day
(2nd cycle of the above 1) is for rest.
Annual consumption capacity =
(10h × a + 0.0014h × b + 14h × c) × 313 days + 24h × c × 52 days =
349.1[mAh] )
Battery life = 2000[mAh]/349.1[mAh/year] = 5.7 (5.728) [year]
a : Current consumption in normal mode 3.6[ѥA]
b : Current consumption at power failure timer mode 180[ѥA]
* Power failure timer mode...Action mode in time period when the motor
can respond to max. speed even the power is off (5sec).
c : Current consumption at power failure mode 60[ѥA]
Mon. to Sat. 313 days/365 day Sun. 52 days/365 days
24h
10h 2h 10h 2h
ON
OFF
Power
supply
24h
acb
cbac
2. Absolute system
Battery (for Backup) Installation