Is temperature compensation important when charging batteries?
When charging batteries temperature of the battery and the environment is of importance.The gassing voltage and consequently the optimum absorption and float voltages are inversely proportional to temperature. This means that in case of a fixed charging voltage a cold battery will be insufficiently charged and a hot battery will be overcharged.
The charging voltage, as quoted by European battery manufacturers, applies at 20°C battery temperature and may be kept constant as long as the temperature of the battery remains reasonably constant (15°C to 25°C). Outside this temperature range temperature compensation is important, and must be implemented.