This study proposes a fast yet accurate multiphysics model for a lithium-ion battery (LIB) that estimates multiphysics responses under operational and abuse conditions. The proposed multiphysics model couples a novel electrochemical model and a thermodynamic-chemical model. The electrochemical model modifies a conventional streamlined model by accounting for the state of charge dependency. The thermodynamic-chemical model accounts for entropic, ohmic, and chemical reaction heating originating from thermal runaway, thereby replicating the chemical reaction of the main components in a LIB under abuse conditions. The proposed multiphysics model was calibrated

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