How to raise the density of the electrolyte
The density of the electrolyte is reduced when the battery is discharged, where it is poured. To raise its density, try to charge the battery up to a boil in banks. If after that the electrolyte density has not risen to the desired parameter, release it in place and add sulfuric acid.
You will need:
hydrometer or concentrated sulfuric acid electrolyte, the battery charger.
Instruction how to raise the density of the electrolyte
Raising the density of the electrolyte without topping up kislotyPervym sign of fall is the density of the electrolyte of the battery. In order to determine the density, use a hydrometer. To do this, use it to pull a certain amount of electrolyte and the pop-up floats determine its density. She should be 1.27 g / cm3, it may be a little higher in the winter. If the density of the electrolyte is less than norm, connect the battery to the charger and charge it for as long as the electrolyte in the banks do not boil. Then discharge it with the bulb during that time, measure the discharge current and its time. Multiplying these values, check the battery capacity and compare it to the passport. If it is more than 30% less than that, recharging will not help. Otherwise, again, charge the battery and measure the density of the electrolyte. It should bounce back.
Raising the density of the electrolyte topping up acid In that case, if the first method does not help, and the density of the electrolyte is less than 1.27 g / cm3, add acid. To do this, pull a hydrometer electrolyte quantity and pour sulfuric acid. Note that its density is 1.83 g / cm3, and it is very corrosive. In the automobile sold electrolyte concentrate density of 1.4 g / cm3 - it is safer, so it's better use it. Top up with the concentrate, while the density is not increased to the desired value. Then put the battery on charge with a small current (max 2 A) on the half hour. During this time, the electrolyte is completely mixed. Again, check the density in all banks. It should be the same and comply with regulations. If the density is still low, repeat the procedure again.
Particular caution observe when working with sulfuric acid. Do not let her contact with skin or clothing. If this happens, rinse with plenty of water and treat this place with a solution of baking soda, which neutralizes the acid. In postponing the solution in any case do not turn the battery because the sludge from the wafer can short-circuit the battery, and it will deteriorate.