A pore-scale smoothed particle hydrodynamics model for lithiumion batteries

A mesoscopic pore-scale model of multi-disciplinary processes coupled with electrochemical reactions in lithium-ion batteries is established via a relatively novel numerical method—smoothed particle hydrodynamics(SPH)method.This model is based on mesoscopic treatment to the electrode(including separator)micro-pore structures and solves a group of inter-coupled SPH equations,including charge(ion in electrolyte phase and electron in solid phase),species(Li?in electrolyte phase and lithium in solid active materials),and energy conservation equations.Model parameters,e.g.the physicochemical properties are location-dependent,directly associated with the local component of the medium.The electrochemical reactions are prescribed to occur exactly at the interface of solid active materials and electrolyte.Simulations to isothermal discharge processes of a battery of 2-dimensional idealized micro-pore structure in electrodes and separator preliminarily corroborate the reasonability and capability of the developed SPH model.