With the increase of renewable energy installed capacity year by year

the power grid has an increasing demand for auxiliary services of energy storage system. Reasonable large-scale integration of energy storage battery cells and orderly control of battery management system are the key to the application and development of energy storage system in the future. However

because the existing research on energy storage power supply model is far behind the actual engineering needs

the establishment of accurate battery model is an urgent need for battery management. Based on the comparison of existing models of energy storage

this paper analyzes the advantages and disadvantages of electrochemical model

black box model and equivalent circuit model as well as their application scenarios by combing with the relevant battery modeling data. This paper focuses on comparing the Rint

Thevenin

PNGV and other equivalent circuit modeling methods of single cells

it describes the advantages and limitations of different cell models in various application scenarios. Finally

the series parallel sequence of battery modules and the influence of inconsistency of battery cells are discussed

which provides an important reference for the performance evaluation and development of battery modules and large-scale energy storage system.