A novel online adaptive fast simple state of charge estimation for Lithium Ion batteries

This paper reviews the procedures, layouts and metrics described in the new test manual issued by the Electric Power Research Institute (EPRI), in order to determine the performance, functionality and equivalent models of a utility scale battery energy storage system (BESS). In this approach, the large battery unit is connected to the dc-link of a bidirectional power conversion system (PCS), which may be interfaced with either the utility grid or a load bank for the purpose of estimating the BESS operation and performance characteristics, some of which includes; available charge/discharge energy at rated power, continuous charge/discharge duration, battery ramp rate, and ac round trip efficiency (RTE). For the purpose of characterizing and verifying the functionalities of the utility sized BESS, the bidirectional converter is operated with different charge and discharge cycles relevant to each specification and the battery state of charge along with electrical measurements at the ac and dc side are monitored and recorded. Also, an electrical equivalent circuit for a utility scale battery unit was developed based on the 1MW/2MWh operational BESS at the LG&E and KU E.W. Brown facility. This model was formulated using an improved method for estimating the battery cell parameters.

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A novel design of solid oxide fuel cell-based combined cooling, heat and power residential system in the UK

Yuan

Liu

Bucknall

2019

2019 8th International Conference on Renewable Energy Research and Applications (ICRERA)

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This paper details the use of objective sizing techniques for a novel design of a residential solid oxide fuel cell (SOFC) combined cooling, heat and electrical power (CCHP) for UK market. The aim of the research is to determine the objective sizing of parameters taking into account the aspects of efficiency, economic and environmental impacts by the entropyweighting approach and grey relationship analysis. The combination of these two approaches helps designers objectively maximise efficiency of energy utilization and minimise emissions and costs of the system that is examined. It is envisaged that electrical demand is met by the fuel cell stacks while the most efficient use is made of heat that is generated by the fuel cell through waste heat recovery to satisfy domestic hot water, freezers, space heating and space cooling. The demand of conventional electric freezers is innovatively designed to be fulfilled by heat exchangers and absorption chillers to further increase the efficiency of heat use. Due to the particularity of the energy demand of the domestic sector in the UK, the proposed system structure, sizing values and control strategiessupported by MATLAB R2018a/Simulink-are suited to the residential energy demands of a single household.

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A novel online adaptive fast simple state of charge estimation for Lithium Ion batteries

Cited by 7 publications

References 20 publications

A Moving Window Least Mean Square Approach to State of Charge Estimation for Lithium Ion Batteries

A Moving Window Least Mean Square Approach to State of Charge Estimation for Lithium Ion Batteries

Power Utility Tests for Multi-MW High Energy Batteries

A novel design of solid oxide fuel cell-based combined cooling, heat and power residential system in the UK

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