Design and analysis of internal resistance testing equipment for high capacity lead-acid battery

The internal resistance of lead-acid battery is an important parameter to reflect the battery performance,so it is necessary to measure accurately.But the internal resistance of a high capacity lead-acid battery is too small to accurately determine.Several methods for measuring the internal resistance were compared,and the suitable method,the instantaneous DC discharge method,was proposed.The internal resistance testing equipment for high capacity lead-acid battery was designed.The theoretical analysis and a large number of experiments prove the correctness of the method.