▎ 摘　　要

NOVELTY - The model has an electrical element including a complex parameter with an imaginary part indicating loss characteristics related to frequency. An inductance element (L) and a capacitor element (Ce) includes complex parameters. The capacitance element is included in a capacitor unit, and indicates battery electrode/electric double layer formed at an interface of an electrolyte such that an imaginary part of the complex parameters of each capacitor cell in the capacitor element represents corresponding loss. USE - Equivalent circuit model for simulating dynamic electrochemical impedance spectrum and charge and discharge characteristics of a battery e.g. lithium ion battery such as lithium iron phosphate/graphene battery, for a vehicle, a power grid energy storage system and a consumer electronic product. Can also be used for a nickel cadmium battery, a nickel hydrogen battery and a leadacid battery. ADVANTAGE - The model is configured such that the electrochemical impedance spectrum and the dynamic charge and discharge characteristics of the lithium iron phosphate battery can be calculated with high accuracy with an error rate less than 5%. DESCRIPTION OF DRAWING(S) - The drawing shows a circuit diagram of an equivalent circuit model. Capacitor elements (Ce, Co) Inductance element (L) Resistors (Ro, Rt)