The battery is charged with the plugs removed with a current of 10% of the nominal value of the battery current. A battery with a capacity of 54 Ah is charged with a current of 5.4 A. Charging is carried out until abundant gas evolution begins and a constant voltage and electrolyte density are achieved for 3 hours. The density of the electrolyte of a charged battery at 25°C must correspond to the data in Table 10.5 for each climatic region.
Table 10.5. Electrolyte density at 25°C, g/cm³
When charging the battery, periodically check the electrolyte temperature and do not allow it to rise above +40°C. If the temperature reaches +40°C, reduce the charging current by half or interrupt charging and cool the battery to +27°C.
Charging is stopped when abundant gas emission begins in all battery elements, and the voltage and density of the electrolyte, recorded during the last three measurements (carried out 1 hour after disconnecting the battery), remain constant.
If at the end of charging the electrolyte density (determined taking into account the temperature correction) differs from the value specified in Table 10.5, then correct it. If the density is increased, remove some of the electrolyte and add distilled water. If the electrolyte density is below the norm, then, having removed it from the element, add electrolyte of increased density (1.4 g/cm³).
After adjusting the electrolyte density, continue charging the battery for another 30 minutes to mix the electrolyte. Then disconnect the battery and measure the electrolyte level in all cells after 30 minutes. If the electrolyte level is below normal, add electrolyte with a density corresponding to the given climate zone. If the electrolyte level is above normal, remove the excess with a rubber bulb.
[The text of the article was copied from the website: FORDBOOK.ru]