Experimental verification of UAS based battery terminal voltage collapse detection on a simple embedded platform

Abstract

This paper experimentally verifies that the Universal Adaptive Stabilization (UAS) based Li-ion battery terminal voltage collapse strategy can be implemented on a simple embedded platform i.e. microcontrollers. Due to the complex nature of Nussbaum type switching functions, it is usually assumed that using the UAS strategy with certain Nussbaum functions is very computationally intensive and requires extremely powerful computation equipment due to the small step-size requirements. However, in this paper we present the implementation and verification of a universal adaptive stabilizer, which uses a Mittag-Leffler function as a Nussbaum function, and implement it on a simple microcontroller based system, i.e. the PIC24FJ128GA010 which is a focal point in this paper. The adaptive observer has proven to be capable of tracking the terminal voltage of different batteries in several separate trials. In another set of experiments, it is shown that bypassing the low-pass filter may also provide alternate ways to detect Li-ion battery terminal voltage collapse.