Improving accuracy of determining the state of charge level of a lithium-ion energy storage device

One of the main functions of battery management system (BMS) is to determine the current charge level, an incorrect estimate of which can lead to unforeseen situations in the operation of various communication systems. Due to the complexity of the analytical model of multi-cell lithium-ion storage devices, when developing algorithms for controlling them, it is effective to use fuzzy inference systems (FIS) that allow for the correction of the state of the charge level. The article presents the results, further improvement of such systems by combining several FIS depending on the state of the battery, which increases the accuracy of determining the charge state of the lithium-ion energy storage by modern BMS.