10.4.7. Charging of the rechargeable battery

The rechargeable battery removed from the car accurately clear, especially its top part, check electrolyte level (see. "Check of level of electrolyte in the rechargeable battery") and if necessary bring it to norm.
The battery is charged with current 6 A at the turned-out traffic jams. Exercises are done prior to plentiful gas emission and achievement of constancy of tension and density of electrolyte during 3 h. Density of electrolyte of the charged battery at 25 °C has to correspond to these tab. 10.7 for each climatic area.
When charging battery periodically check temperature of electrolyte and do not allow its increase over +40 °C. When temperature reaches +40 °C, it is necessary to reduce half charging current or to interrupt charging and to cool the battery to +27 °C.
Charging is stopped when plentiful liberation of gas in all elements of the battery begins, and tension and density of electrolyte during the last three measurements (carry out in 1 h after shutdown of the battery) will remain constants.
If at the end of charging the electrolyte density (determined taking into account the temperature amendment) differs from specified in tab. 10.7, modify it. At the increased density select a part of electrolyte and add the distilled water. If density of electrolyte is lower than norm, then select it from an element and add electrolyte of the increased density (1,4 g/cm3).
After adjustment of density of electrolyte continue battery charging within 30 min. for electrolyte hashing. Then switch-off the battery and in 30 min. measure electrolyte level in all elements. If the level of electrolyte appears below norm, add electrolyte which density corresponds to this climatic area (see tab. 10.7). If the level of electrolyte is higher than norm, select excessive electrolyte a rubber pear.

The table 10.7 Electrolyte Density at 25 °C, g/cm3