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Question: How to adjust the charging current of lead-acid batteries according to temperature changes

by:Power Kingdom     2021-06-18
Label: Question: How to adjust the charging current of lead-acid batteries according to temperature changes? Answer: There are two commonly used charging methods for lead-acid batteries-floating charging and cyclic charging. They have different requirements for ambient temperature when charging. The lead-acid battery is charged in the form of floating charge. The main point of floating charge is to charge with a constant current. It must have strict execution rules on temperature. When the temperature is below 0°C or above 40°C, it is necessary to correct the charging voltage. With 20°C as the starting point, for every degree change, the single cell voltage changes +-3mv. When the lead-acid battery is cyclically charged, the charging voltage is 2.40-2.50V/single cell (the set value at 20°C), and the constant voltage voltage is charged. When charging at a temperature below 5°C or above 35°C, start at 20°C, and adjust the charging voltage to +-4mv/cell for every degree of change. The initial charge current is controlled below 0.25CA. The charging capacity is set to 100-120% of the discharged capacity, but when the ambient temperature is below 5°C, it is set to 120-130%. The lower the temperature (below 5°C), the longer the charging end time, and the higher the temperature (above 35°C), the more likely it is to overcharge. Therefore, it is better to charge at 5°C to 30°C, especially during recycling. To prevent overcharging, try to install a charging timer or automatically switch to trickle charging. The temperature of the lead-acid battery should be controlled within the range of -15℃~+40℃ when charging.
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