This paper presents a method for evaluating the availability of lead-acid battery test equipment and designs the\ncorresponding evaluation mathematical model. International standard IEC60896-2 specifies the lead-acid battery\ninternal resistance level. Because the internal resistance value is usually micro-Ohm level and the lead-acid battery\nhas special electrochemical characteristics, it�s very difficult to measure it. Until now no authority can officially\nprovides the actual resistance value for a given battery. However, the industry has agreed that the internal resistance\nwill gradually increases during the use of the battery and the performance of the battery has close relationship with\nthe change of the internal resistance, so even if the measurement equipment can not measure the absolute actual\nresistance, but as long as the battery can be measured a small change in internal resistance, it has a high availability.\nIn this paper, we propose a micro-incremental verification method and a mathematical model to facilitate, accurately\nand quickly verify whether the battery internal resistance test equipment can accurately and stably measure the internal\nresistance of the battery, and provide technical verification reference for selecting the battery measuring equipment.
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