The relationship between battery internal resistance and capacity

The relationship between battery internal resistance and rated capacity, and the relationship between internal resistance and state-of-charge SOC of the same model of battery. More than ten years ago, people tried to use the changes in the internal resistance (or conductance) of valve-regulated sealed lead-acid batteries to detect the battery capacity and predict the battery life online, but failed; people proposed the high-current discharge capability of the power battery. The requirements are getting higher and higher, which requires reducing the internal resistance of the battery as much as possible. Therefore, this article will further explore and clarify the intrinsic relationship between the internal resistance and capacity of some commonly used batteries.
valve controlled seal
Currently, valve-regulated sealed lead-acid batteries have gradually replaced open flow electrolyte lead-acid batteries and are widely used in postal and telecommunications power supplies, UPS, energy storage power systems, etc. Powered valve-regulated sealed lead-acid batteries have been widely used in electric mopeds. These fields require online detection of the battery's state of charge.