Search results for "state of charge"

showing 9 items of 19 documents

An optimization approach for efficient management of EV parking lots with batteries recharging facilities

2013

In this paper an optimization approach to devise efficient management strategies for Electric Vehicles parking lots is proposed. A Monte Carlo approach is used to evaluate the load consumption profile for groups of Electric Vehicles showing different features. The Monte Carlo approach allows to combine the different social and economical features affecting the commercial penetration of Electric Vehicles with the technical aspects. The basic feature to be assessed is the initial State Of Charge, which in turn depends on the distance travelled by the vehicle since the last recharge and thus by the usage of the vehicle (private, professional). The model is then used to optimize some objective …

General Computer ScienceComputer scienceMonte Carlo methodSmart chargingStatistical modelComputational intelligenceGroundwater rechargeElectric vehicles managementElectric vehicles management;Simulated annealing;Smart chargingAutomotive engineeringSimulated annealingSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaState of chargeSimulated annealingSimulation
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Sensitive magnetometry reveals inhomogeneities in charge storage and weak transient internal currents in Li-ion cells

2020

The ever-increasing demand for high-capacity rechargeable batteries highlights the need for sensitive and accurate diagnostic technology for determining the state of a cell, for identifying and localizing defects, and for sensing capacity loss mechanisms. Here, we leverage atomic magnetometry to map the weak induced magnetic fields around Li-ion battery cells in a magnetically shielded environment. The ability to rapidly measure cells nondestructively allows testing even commercial cells in their actual operating conditions, as a function of state of charge. These measurements provide maps of the magnetic susceptibility of the cell, which follow trends characteristic for the battery materia…

LI-IONBattery (electricity)MultidisciplinaryMaterials sciencebusiness.industryMagnetometer//purl.org/becyt/ford/1.3 [https]Characterization (materials science)law.inventionIonMagnetic field//purl.org/becyt/ford/1 [https]State of chargeFAILURESlawPhysical SciencesOptoelectronicsTransient (oscillation)BATTERIESbusinessCapacity lossProceedings of the National Academy of Sciences
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A NEW REPRESENTATION OF ENERGY STORAGE SYSTEMS OPERATION USING FOURIER THEORY IN OPTIMAL SMART GRIDS MANAGEMENT

2012

This paper investigates the possibility to use a new modeling of Energy Storage Systems based on zero integral functions. Such functions represent the course of the energy level stored in batteries during the solution of optimal management problems in smart-grids. Storage devices, such as all the other components that are required to meet an integral capacity constraint along the dispatch time, must show the same State of Charge at the start and at the end of the timeframe considered for operation. In this paper, a set of sinusoidal functions have been used for the synthesis of the charge and discharge course of energy Storage Systems. Such representation allows to eliminate the difficult c…

Mathematical optimizationEngineeringbusiness.industryEnergy storageEvolutionary computationConstraint (information theory)integral constraints optimal management distributed energy resources multi-objective evolutionary optimization smart grids.Settore ING-IND/33 - Sistemi Elettrici Per L'Energiasymbols.namesakeSmart gridState of chargeFourier analysissymbolsbusinessRepresentation (mathematics)Energy (signal processing)
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High-rate cycling performance of lead-acid batteries with nanostructured electrodes

2021

In this work we present lead-acid batteries with nanostructured electrodes cycled with different C-rate from 1C (1 hour to complete charge) up to 30C (120 seconds to complete charge) and imposing a very deep discharge. In comparison to the parameters usually used for commercial batteries, these are much more stressful conditions in terms of cut-off and charge/discharge rate.

Nanostructured ElectrodesHigh C-rate cyclingState of chargeNano TechnologyLead-Acid Battery
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CO<inf>2</inf> reduction exploiting RES for EV charging

2016

The world is facing an urgent need to reduce emissions, limiting pollution for a better quality of life. This objective has to be reached by all cities and governments worldwide. This paper focuses on the field of transportation, which is greatly responsible for air pollution, mainly in cities and urban areas such as towns, airports and seaports. The diffusion of electric vehicles (EVs) enables a significant reduction of air pollutants emitted by combustion engines; however, their recharge can affect the total pollution by their increasing energy demand. A solution is the use of Renewable Energy Sources (RES) to charge EVs. This paper analyzes the feasibility of integrating EVs and RES, foc…

PollutionEngineeringbusiness.industry020209 energymedia_common.quotation_subjectAir pollutionEnvironmental engineering02 engineering and technologyGroundwater rechargeCombustionmedicine.disease_causeRenewable energyReduction (complexity)State of charge0202 electrical engineering electronic engineering information engineeringmedicineProduction (economics)businessmedia_common2016 IEEE International Conference on Renewable Energy Research and Applications (ICRERA)
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Ev charging station at university campus

2017

This paper faces the technical and economic challenges related to the design of a green recharge area for electric vehicles at the Campus of Palermo, Italy, with the aim of reduce both costs and pollution connected to the charging process. Based on the behaviour of the student population, the electrical load is identified and two possible solutions are evaluated to manage the peak load: an orientation of the panels increasing the power at defined time and the use of a storage system. The main strength and weakness points of two systems are investigated by taking into account the Levelized Cost of Energy (LCOE), which reaches 75.3 €/MWh for the orientation of panel and 103 €/MWh for stor…

Power stationElectrical loadbusiness.industry020209 energyelectric vehicleEnergy Engineering and Power Technologyrecharge areastate of charge02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciNetwork topologySettore ING-INF/01 - ElettronicaAutomotive engineeringPower (physics)photovoltaicUniversity campusCharging stationautomotive)Computer data storage0202 electrical engineering electronic engineering information engineeringEnvironmental scienceElectrical and Electronic EngineeringbusinessCost of electricity by source2017 IEEE International Telecommunications Energy Conference (INTELEC)
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Nanostructured lead acid battery for electric vehicles applications

2017

This paper presents an innovative lead acid battery, based on nanostructured active materials. Both charging time and specific energy are greatly enhanced in comparison with commercial lead acid battery. Starting from the extremely valuable performances of the nanostructured battery, also a circuital model, for application in electric vehicle traction, has been specifically developed. The circuital model has demonstrated that an enhanced nanostructured battery allows an increase of traveled distance by electric vehicles.

business.product_categoryMaterials sciencecircuital modelmedicine.medical_treatment02 engineering and technologyElectric vehicleSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciAutomotive engineeringHardware_GENERALElectric vehicle0202 electrical engineering electronic engineering information engineeringmedicineSpecific energyElectrical and Electronic EngineeringLead–acid batterynano technologybusiness.industry020208 electrical & electronic engineeringElectrical engineeringstate of chargeTraction (orthopedics)021001 nanoscience & nanotechnologySettore ING-IND/31 - ElettrotecnicaState of chargeComputer Networks and CommunicationSettore ING-IND/23 - Chimica Fisica ApplicataLead acid batteryAutomotive EngineeringAutomotive battery0210 nano-technologybusiness
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Field testing of repurposed electric vehicle batteries for price-driven grid balancing

2019

Abstract As electric cars become more widespread, the disposal and recycling of used batteries will become an important challenge. Typically, vehicle batteries are replaced if their capacity drops to 70–80% of initial capacity. However, they may still be useful for stationary applications. In this paper, results from a field test of a molten salt high-temperature electric vehicle battery repurposed as stationary storage for grid balancing are presented. In a previous study, we have shown that a mixed integer linear programming control strategy driven by a spot-market price for electricity is best suited for an implementation on hardware with limited computational resources. A 14-day experim…

business.product_categoryMean squared errorRenewable Energy Sustainability and the Environmentbusiness.industryComputer science020209 energyEnergy Engineering and Power Technology02 engineering and technology021001 nanoscience & nanotechnologyGridAutomotive engineeringState of chargeElectric vehicle0202 electrical engineering electronic engineering information engineeringElectric-vehicle batteryElectricityElectrical and Electronic Engineering0210 nano-technologybusinessInteger programmingEfficient energy useJournal of Energy Storage
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Performance of Lead-Acid Batteries with Nanostructured Electrodes at Different Temperature

2018

In this work we present innovative lead-acid batteries with nanostructured electrodes, which are cycled in a wide range of temperatures typically of lead-acid commercial batteries (EN 61427-1: 2013). In comparison to parameters usually used to commercial batteries, much more stressful conditions in terms of cut-off, charge/discharge rate and discharge were imposed.

temperature testMaterials sciencenanostructureRenewable Energy Sustainability and the Environmentnanovireslead acid batterieEnergy Engineering and Power TechnologyComputer Science Applications1707 Computer Vision and Pattern RecognitionNanotechnologystate of chargeIndustrial and Manufacturing Engineeringtemplate electrosynthesiDischarge rateComputer Networks and CommunicationSettore ING-IND/23 - Chimica Fisica ApplicataState of chargeArtificial IntelligenceLead acid batteryElectrodeLead–acid batterynano technologyInstrumentationnanostructured electrodeperformance2018 IEEE 4th International Forum on Research and Technology for Society and Industry (RTSI)
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