Topic
State of charge
About: State of charge is a research topic. Over the lifetime, 12013 publications have been published within this topic receiving 201419 citations. The topic is also known as: SoC & SOC.
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TL;DR: In this article, a stress model for a pouch type high power LiPB is developed based on electrochemical and thermal model, where the stress induced by the ion concentration in the electrode particles is considered.
117 citations
TL;DR: In this article, the performance of an undivided flow battery based on the Pb(II)/Pb and PbO2/Pb (II) couples in aqueous methanesulfonic acid as a function of state of charge, current density, electrolyte flow rate and temperature is reported.
117 citations
TL;DR: The integrated design of battery size and EMS can be determined by managing the change of utility revenue to gain economic benefits for the large-scale PV power plant application.
Abstract: Battery storage controlled by an energy management system (EMS) becomes an enabling technique to enhance solar farm integration. In this paper, the EMS controls battery storage to shape the fluctuated photovoltaic (PV) plant output into a relatively constant power and support the peak load. The proposed integrated design method considers both battery size and EMS impacts on the utility benefits and cost. The utility benefits include power generation, peak power support, and reduced line losses. The cost of battery storage is determined by the size and lifetime based on the developed battery models. Accordingly, the utility revenue change due to the battery storage controlled by EMS can be evaluated. Therefore, the integrated design of battery size and EMS can be determined by managing the change of utility revenue to gain economic benefits for the large-scale PV power plant application. Finally, the lithium-ion phosphate (LiFePO4) battery and lead-acid battery are compared to demonstrate the proposed method on a utility system model, respectively.
117 citations
TL;DR: A novel co-estimation hierarchy for state of charge (SOC), state of health (SOH) and state of power (SOP) in lithium-ion batteries is devised and validated experimentally and presents remarkable benefits, compared to separate estimation solutions.
116 citations
TL;DR: A new battery state-of-charge (SOC) estimation method for lithium-ion batteries (LIBs) based on a nonlinear fractional model with incommensurate differentiation orders with a Luenberger-type observer is presented.
Abstract: This paper presents a new battery state-of-charge (SOC) estimation method for lithium-ion batteries (LIBs) based on a nonlinear fractional model with incommensurate differentiation orders. A continuous frequency distributed model is used to describe the incommensurate fractional system. A Luenberger-type observer is designed for battery SOCestimation. The observer gain that can stabilize the zero equilibrium of the estimation error system is derived by Lyapunov’s direct method. The proposed SOC observer is examined using the real-time experimental data of LIBs. The robustness of the observer under different test conditions, including different aging levels, different driving cycles, and different cells, is also presented.
116 citations