Electrical Circuit Modeling of a 18650 Lithium-Ion Cell for Charging Protocol Testing for Transportation Electrification Applications

Modeling gives the opportunity to the user to test new platforms, techniques, and technology, with lower cost, high safety and in a fast pace, when compared with the experimental approach. A precise battery model is required to specify their appropriateness for different applications and to study their dynamic behavior. In addition, it is important to design an efficient battery system for power applications. This paper describes the modeling of a Nickel Manganese Cobalt (NMC) 18650 lithium-ion cell intended for testing new charging methods testing. An electric circuit model with 2RC network is used, and the elements parameterization are performed for charge and discharge. The data is collected experimentally using an automated battery system to run the hybrid pulse test (HPT). A detailed analysis of the parameters identified will be done, along the performance results of the proposed ECM with the standard constant-current constant-voltage (CC-CV) and constant-temperature constant-voltage (CT-CV) current profiles.