A factor that indicates how large the necessary dilution of the hydrogen is and is determinable as below:
(100% -4%) / 4 = 24%
The amount of hydrogen generated per Ah.
A general safety factor.
The total number of cells in the battery or batteries.
Refers to the rated capacity of the battery. For lead-acid batteries comes 10h capacity while nickel-cadmium (NiCd) batteries are the 5h capacity as said used in the calculations and in both cases, it is at 20 ˚ C
The current that the charge gives rise to vätgs formed.
The computed flow needed for the hydrogen concentration should be less than 4%.
The minimum clear area for input repsektive emissions required for natural ventilation.
If data for Ifloat och Iboost are missing can table below with the data used to determine Igas.
| Free ventilated lead acid batteries (Sb < 3%) | Valve regulated lead batteries | NiCd batteries vented cells | |||
|---|---|---|---|---|---|
| Gas discharging factor | fg | 1 | 0,2 | 1 | |
| Safety factor | fs | 5 | 5 | 5 | |
| Float voltage | ufloat | 2,23 | 2,27 | 1,4 | V/cell |
| Float current | Ifloat | 1 | 1 | 1 | mA/Ah |
| Current | Igas | 5 | 1 | 5 | mA/Ah |
| Boost charging voltage | uboost | 2,4 | 2,4 | 1,55 | V/cell |
| Boost charging current | Iboost | 4 | 8 | 10 | mA/Ah |
| Current | Igas | 20 | 8 | 50 | mA/Ah |
Float-/boost charge current increases with increasing temperature. The values in the table above apply up to about 40 ° C
Used recombinant cell valves are the gas-generating current I gas is reduced to 50% of the ventilated cells.
One factor that shows some of the power of a fully charged battery that generates hydrogen gas.
Safety factor takes into account the Old or faulty cells in the battery.
Displays the distance from the batteries where the dilution of the hydrogen gas to a safe level can be considered significant. The distance may vary depending on the battery manufacturer's safety calculations or measurements.
| Flow: |  |
|---|---|
| Current: |  |
| Min area: |  |
| Safety distance: |  |