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Ventilation Calculation

Ventilation is required for a battery system with 210 cells, 50 Ah capacity, and 0.05 A charging current to prevent hydrogen gas accumulation. Without ventilation, the hydrogen gas in the 7.68 m3 room would reach 2.87% after 1 hour, exceeding the allowable 1%. A minimum 109.15 m3/hr air flow through a 62.38 cm diameter vent hole is required to keep hydrogen levels below the safety limit.

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739 views1 page

Ventilation Calculation

Ventilation is required for a battery system with 210 cells, 50 Ah capacity, and 0.05 A charging current to prevent hydrogen gas accumulation. Without ventilation, the hydrogen gas in the 7.68 m3 room would reach 2.87% after 1 hour, exceeding the allowable 1%. A minimum 109.15 m3/hr air flow through a 62.38 cm diameter vent hole is required to keep hydrogen levels below the safety limit.

Uploaded by

jdcom_in
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
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Ventilation Calculation as per EN 50272 Vented batteries

No.Of cells = No of batteries = Rated capacity = Charging current Boost(I gas) = H2 release rate = Hydrogen produced = 210 1 50 0.05 0.00042 0.22050

Ah A/Ah m3/Ah m3/Hr

Box / Room volume = Length Width Height % of Hydrogen gas in room after 1 hour = (With out ventilation)

7.68 2.4 1.6 2

m3 m m m

2.87 %

Allowable Hydrogen = Safety factor =

1.00 % 5.00

Air flow required =

109.15 m3/Hr 3890.68 62.38 cm

Min. dia of vent hole required = (Assuming natural air velocity as 0.1 mt/S)

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