Unik Techno • August 20, 2020
My 12v 150Ah lead acid battery got leaked through vents due to improper unloading. Should I refill acid to it?
What happens if lead acid battery runs out of water?
Based on your clear indication that the acid has leaked through the vents during unloading and presuming that there has been no breakage of containers by any physical damage the steps to be taken is as follows:
Check the specific gravity of the electrolyte in the battery. Procure sulphuric acid of the same specific gravity for filling.
If sp. gr. not clear or if you are unable to measure please contact manufacturer and arrange to get sulphuric acid of same specific gravity.
Ensure that the battery is not kept dry since internal components can get damaged due to a exothermic reaction which starts on the surface of the negative plates and this in turn can damage the separators and other battery components.
In case the entire qty of electrolyte has spilled you may fill demineralised or distilled water till such time as the electrolyte is available. As soon as electrolyte is available this water shall need to be thrown out and acid shall need to be poured in. In this case you may have to fill acid of slightly higher sp. gr. or adjust sp. gr. at the end of charge with remote or onsite help from manufacturer.
Ensure that refilling is done to the recommended level and also ensure that level is same in all cells.
It is not possible to recommend the sp. gr. of acid since different batteries need different concentration of electrolyte.
A traction battery needs 1.280 whereas a single cell stationary battery needs 1.210 or 1.240 depending on whether it is NDP or TBS type. A home inverter battery needs 1.240 sp. gr. acid. These are the details pertaining to a fully charged battery as per IS specification.
Further if the battery was in a discharged condition the gravity shall be lower and refilling has to be done accordingly of lower sp. gr. acid.
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