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PROJECT OF THE FAN TO EN 50272-2 and CEI EN IEC 62458-2
The quantity of air "Q" necessary for the ventilation of a battery compartment, must be calculated according to the formula simpli fi ed:
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Q = 0.05 x xnx Igas Crt x 10 (m / h)
= 0.05 vxqxs (v = hydrogen density; q = hydrogen generated; s = safety factor) n = number of battery
elements
Igas = current that produces gas expressed in mA per Ah of capacity delivered, for the charging current fl octant (I fl oat) or for
the rapid charging current (Iboost). Crt = nominal battery capacity (Ah per single battery)
The formula for the calculation of the quantity of air "Q" varies according to the technology of the battery The amount
of the fl ow of air ventilation should be ensured preferably by natural or forced ventilation (artificial).
For natural ventilation, rooms or cabinets of the batteries must have sockets and s fi ati having surface free calculated with the
following formula. A = 28 x Q
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Q = amount of air ventilation (m / h)
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A = surface free of the socket and the s fi ato of air (cm)
Example of calculation: for VRLA batteries with AGM technology (maintenance-free batteries) UPS: with 40 12V
batteries (6 2V for battery elements), with capacity of 100Ah
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Q = 0.05 x xnx Igas Crt x 10 (m / h)
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0.05 m / Ah
n = number of batteries x N = 240 elements of battery elements (total number of elements) Igas: 1 (mA / Ah) (for
the voltage fl octant) Crt = 100 (Ah)
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Q = 0.05 x 240 x 1 x 100 x 10 = 1.2m / h
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A = 28 x 1.2 = 33,6cm
The quantity of air "Q" necessary for the ventilation of a battery compartment, must be calculated according to when reported by
legislation.
A
h
A
h
h > o = to 2 meters.
BATTERY BOX
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BATTERY BOX
