Real-world study for the optimal charging of electric vehicles
Results have shown that for the 20%–100% SoC area, average specific real energy consumption is 1.75 kWh/100 km more than what is displayed on EV''s dashboard. Particularly, average specific real energy consumption is 14.67 kWh/100 km, while the average displayed consumption is 12.92 kWh/100 km.
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Ah Efficiency
Generally, the efficiency decreases with decreasing nominal voltage. It is assumed that similar capacity and similar internal resistance for cells of identical capacity results in similar absolute voltage drops during charging and discharging. If the voltage drop is 100 mV during charging and 100 mV during discharging and if η Ah of 100% is assumed, the …
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Effects of multiple insufficient charging and discharging on compressed carbon dioxide energy storage …
The evaluations of the energy storage density, system efficiency and power output, under the effects of insufficient charging/discharging, are presented in Fig. 8, Fig. 10, Fig. 12. The results demonstrate that the actual performance of density and power, except for the system efficiency, could highly deviate from the targets at design …
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Thermal stratification characteristics during simultaneous charging and discharging for different storage …
Temporal variation of (a) cumulative energy stored, (b) cumulative energy discharged, (c) discharging efficiency, and (d) cumulative energy losses for Cases 1–3 at coil flow rates of 0.5 and 2 L/min.
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A simple and easy-to-implement battery equalization strategy for photovoltaic-battery energy storage …
4 · Abstract. For renewable energy sources such as photovoltaic (PV), energy storage systems should be prioritized as they smooth the output well. Although lit State …
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Distributed charge/discharge control of energy …
It is shown in [] that the efficient charging is fulfilled in three stages: constant current, constant voltage and floating charge stages. In addition, according to the operation modes of micro-grids, during the …
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A comprehensive analysis of Vehicle to Grid (V2G) systems and scholarly literature on the application …
The authors in Ref. [27] suggest a detailed model of V2G system with a hybrid energy storage system (HESS) to provide primary frequency control (PFC) and dynamic grid support (DGS) simultaneously without disturbing the schedule of charging/discharging.
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Parametric investigation of charging and discharging performances of a cascaded packed bed thermal energy storage …
The cyclic thermal performance of the PBTES system with cascaded PCMs is first numerically analyzed to optimize the configuration of the cascaded PBTES system and study the heat transfer mechanism. The cascaded packed bed with the height H bed = 600 mm and the diameter d bed = 300 mm consists of three layers with different PCM …
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High energy storage density with ultra-high efficiency and fast charging–discharging …
A. Manan et al. J. Adv. Dielect. 11, 2150018 2021 2150018-2 FA WSPC/270-JAD 2150018 ISSN: 2010-135X nonlinear dielectrics, such as antiferroelectrics (AFEs) and relaxor ferroelectrics (RFEs) are being investigated for their energy storage characteristics as
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Energy-efficient system and charge balancing topology for …
Generally, the battery has a higher energy storage capacity and SC has a small energy storage capability to compare with them to charging and discharging time [80], [81], [82]. The SCs have higher capacity and high power efficiency compared to the conventional capacitor and ES technology [82], [83], [84] .
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Real-world study for the optimal charging of electric vehicles
The present study, that was experimentally conducted under real-world driving conditions, quantitatively analyzes the energy losses that take place during the charging of a Battery Electric Vehicle (BEV), focusing especially in the previously unexplored 80%–100% State of Charge (SoC) area.
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Fully distributed control to coordinate charging efficiencies for …
This study proposes a novel fully distributed coordination control (DCC) strategy to coordinate charging efficiencies of energy storage systems (ESSs). To …
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State-of-the-art review on energy and load forecasting in …
In the modern era, there has been a growth in interest in microgrids (MGs), which has important implications for the power system''s dependability, production pollution reduction, and energy efficiency. As a key element …
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Overview of distributed energy storage for demand charge reduction | MRS Energy …
Applying a demand charge of $10/kW-month, which is on the high end of residential demand charges, this household would pay $56.40 in demand charge for the month of January. Energy storage devices could level this demand by charging during low demand hours and discharging during peak demand hours.
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Exergy analysis and optimization of charging–discharging processes for cascaded latent heat storage …
The use of exergy analysis provides theoretical guidance for the cascaded latent heat storage system (CLHSS). However, the exergy analysis of the CLHSS charging–discharging processes is imperfect with two problems to be solved. One is the lack of exergy flow analysis, the other is the inaccurate expressions of the overall …
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Thermodynamic Modelling of Thermal Energy Storage Systems
Abstract. This paper presents a novel methodology for comparing thermal energy storage to electrochemical, chemical, and mechanical energy storage technologies. The underlying physics of this model is hinged on the development of a round trip efficiency formulation for these systems. The charging and discharging processes …
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Designing a battery Management system for electric vehicles: A …
Understanding and measuring these losses helps to assess the energy from BMS and ability to transfer energy efficiency from the battery pack to the load. This congregated research can evaluate the effectiveness of the BMS during charging and discharging situations by first analysing the efficiency of each individual component and …
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Fully distributed control to coordinate charging efficiencies for energy storage systems | Journal of Modern Power Systems and Clean Energy
This study proposes a novel fully distributed coordination control (DCC) strategy to coordinate charging efficiencies of energy storage systems (ESSs). To realize this fully DCC strategy in an active distribution system (ADS) with high penetration of intermittent renewable generation, a two-layer consensus algorithm is proposed and …
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An overview of regenerative braking systems
Regenerative/energy braking is dependent on the operation of ABS. For instance, if a braking situation requires ABS intervention, then RBS operation is halted and the controller resorts to friction brakes. An RBS using an intelligent controller, however, is not limited to ABS intervention.
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Exergy analysis and optimization of charging–discharging processes for cascaded latent heat storage …
Increasing the inlet charging HTF temperature has little effect on the maximum overall cycle exergy efficiency, while increasing the inlet discharging HTF temperature can significantly improve the maximum overall cycle exergy efficiency.
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Study on discharging characteristics of solid heat storage bricks: …
The solid electric heat storage (SEHS) device is a kind of energy storage technology with high energy storage density, high efficiency and good economy among them. 1.2. Literature review The characteristics of SHS materials are critical to their charging and It ...
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Effects of multiple insufficient charging and discharging on …
In the results, the effects of charging/discharging insufficiency on the efficiency, storage density and power output of the energy storage system during long …
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Research on Charging and Discharging Characteristics of Solar Water Storage …
With the gradual improvement of the efficiency of solar collector and energy storage device, solar energy is widely used in people''s daily hot water, heating and ventilation. At present, the large-scale solar water heating system is gradually integrated with the building to realize automation, intelligence and multi-energy complimentary use.
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A hybrid compression-assisted absorption thermal battery with high energy storage density/efficiency and low charging …
Results show that the cycles with auxiliary compression can achieve a higher energy storage efficiency and density with a faster charging/discharging rate under a lower charging temperature. With a charging temperature of 80 °C, the energy storage efficiency and density are as high as 0.67 and 282.8 kWh/m 3 for the proposed …
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[1805.00100] Control of Energy Storage in Home Energy Management Systems: Non-Simultaneous Charging and Discharging Guarantees …
View a PDF of the paper titled Control of Energy Storage in Home Energy Management Systems: Non-Simultaneous Charging and Discharging Guarantees, by Kaitlyn Garifi and 3 other authors View PDF Abstract: In this paper we provide non-simultaneous charging and discharging guarantees for a linear energy storage …
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Experimental and numerical investigation on the charging and discharging process of a cold energy storage …
The cold-release efficiency of the cold energy storage unit is as high as 96.44 %. Abstract To address the current issue of the difficulty to use the hot outdoor environment during summer nights to provide coolness for phase change materials (PCM) and thus reduce building energy consumption in hot summer areas, a novel cold energy …
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A review: Energy storage system and balancing circuits for …
These balancing circuits are bidirectional and work on charging or discharging mode, voltage/charge balancing variance is comparatively high, and overall efficiency is slightly improved. The C2P balancing circuits are single winding transformer, multi winding transformer, multiple winding transformer, and flyback converter.
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Investigation of Charging Efficiency of a Lithium-ion Capacitor during Galvanostatic Charging …
In the energy storage device, the coulombic efficiency is discussed, which is defined as C d /C c, where C d is the discharging capacity and C c is the charging capacity []. In the voltage range from 2.38 to 3.6 V in this experiment, C c and C d are almost the same and they are 50.46 and 50.45 C, respectively.
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Two-stage charge and discharge optimization of battery energy …
In this study, we propose a two-stage model to optimize the charging and discharging process of BESS in an industrial park microgrid (IPM). The first stage is used to optimize …
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Charging and discharging characteristics of absorption thermal energy storage …
Absorption thermal energy storage systems using H 2 O/ionic liquids are explored. Dynamic charging/discharging characteristics and cycle performance are compared. • [DMIM][DMP] has the highest coefficient of performance and energy storage density. • [EMIM
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Electric Vehicles Charging Technology Review and Optimal Size …
Many different types of electric vehicle (EV) charging technologies are described in literature and implemented in practical applications. This paper presents an overview of the existing and proposed EV charging technologies in terms of converter topologies, power levels, power flow directions and charging control strategies. An …
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