大型钒液流电池的开发和建模.pdf

1、Development and Modelling of Large-scale Vanadium Flow BatteriesJune,2025Daisaku Taguchi,K.Fujikawa,T.Kanno,K.YamanishiSumitomo Electric Industries,Ltd.IntroductionSumitomo Electric Industries(SEI)Overview Global electronics company specializing in power,communication,and control systems technologie

2、s and productsRecent Announcements Press release on the new advanced VFB systems in February 2025 Goals:Achieve high energy density Reduce overall costs Ensure long-term operation 15%Up*30%Off*Up to30 years*Compared to previous models System Overview and Configuration-3-300 kW/2400 kWh VFB System Tw

3、o-tier configuration Upper tier:Battery cells(300 kW output)Lower tier:Electrolyte tanks(2400 kWh capacity)Connection to PCS Charging/discharging controlled according to load demandsPower Conversion System(PCS)Charge/DischargeUnfavorable Phenomena and Optimization Challenges-4-Unfavorable Phenomena

4、Ion crossover through the membrane Leads to long-term capacity loss Pressure loss in battery cells and pipelines Reduces system efficiencyOptimization Challenges Ion Crossover Suppression Mixing techniques Membrane technology Flow Rate Control Minimizing pump losses Maximizing SOC(State of Charge)ra

5、ngeModeling Approach-5-Objective Develop model for 300 kW/2400 kWh VFB systemFocus Areas Ion crossover Battery voltage dynamics Approach Mathematical modeling Use of detailed equations and simulations MathematicalmodelingPCSVFBCharge/dischargeDC currentVanadium ion concentration,Voltage,etc.=,=(,)Ma

6、thematical Model-6-Concentration Variations Vanadium ion concentration in cells ddt=1+Vanadium ion concentration in tanksddt=1 Electrolyte Volume Volume variation due to osmosis ddt=Battery Voltage Calculation Voltage equation=,+,+,+,1 based on several references-+PCS235423542243