电化学-热耦合模型是锂离子电池设计开发过程的关键技术。采用基于WLTC(Worldwide Light-duty Test Cycle)工况的锂离子电池电化学-热耦合模型,分析了111型镍钴锰酸锂电池(Li(Ni_(x)Co_(y)Mn_(z))O_(2))同侧极耳分布的方形电池的温度场...电化学-热耦合模型是锂离子电池设计开发过程的关键技术。采用基于WLTC(Worldwide Light-duty Test Cycle)工况的锂离子电池电化学-热耦合模型,分析了111型镍钴锰酸锂电池(Li(Ni_(x)Co_(y)Mn_(z))O_(2))同侧极耳分布的方形电池的温度场以及电特性,并优化极耳尺寸及极耳间距。研究发现,WLTC工况下放电倍率对温度场和电特性有显著影响,随着放电倍率的增大,WLTC工况的两个循环结束时刻电池的最大温升和温差均以凹型曲线的趋势升高,放电倍率为2C时温升达12.705℃、温差为1.359℃;电压曲线的变化趋势也随放电倍率的增大而大幅下降。进一步研究发现,电池的最大温升和温差与正、负极耳的宽度及极耳间距显著相关,当正极耳宽度为0.03 m,负极耳宽度为0.05 m时,电池的最大温升与温差最小;当正、负极耳间距为0.05 m时,电池的最大温升与温差最小。展开更多
In this work three fuel consumption and exhaust emission models,ADVISOR,VT-MICRO and the European Environmental Agency Emission factors,have been used to obtain fuel consumption(FC)and exhaust emissions.These models h...In this work three fuel consumption and exhaust emission models,ADVISOR,VT-MICRO and the European Environmental Agency Emission factors,have been used to obtain fuel consumption(FC)and exhaust emissions.These models have been used at micro-scale,using the two signal treatment methods presented.The manuscript presents:1)a methodology to collect data in real urban driving cycles,2)an estimation of FC and tailpipe emissions using some available models in literature,and 3)a novel analysis of the results based on delivered wheel power.The results include Fuel Consumption(FC),CO_(2),NO_(x) and PM_(10) emissions,which are derived from the three simulators.In the first part of the paper we present a new procedure for incomplete drive cycle data treatment,which is necessary for real drive cycle acquisition in high density cities.Then the models are used to obtain second by second FC and exhaust emissions.Finally,a new methodology named Cycle Analysis by Ordered Power(CAbOP)is presented and used to compare the results.This method consists in the re-ordering of time dependant data,considering the wheel mechanical power domain instead of the standard time domain.This new strategy allows the 5 situations in drive cycles to be clearly visualized:hard breaking zone,slowdowns,idle or stop zone,sustained speed zone and acceleration zone.The complete methodology is applied in two real drive cycles surveyed in Barcelona(Spain)and the results are compared with a standardized WLTC urban cycle.展开更多
文摘In this work three fuel consumption and exhaust emission models,ADVISOR,VT-MICRO and the European Environmental Agency Emission factors,have been used to obtain fuel consumption(FC)and exhaust emissions.These models have been used at micro-scale,using the two signal treatment methods presented.The manuscript presents:1)a methodology to collect data in real urban driving cycles,2)an estimation of FC and tailpipe emissions using some available models in literature,and 3)a novel analysis of the results based on delivered wheel power.The results include Fuel Consumption(FC),CO_(2),NO_(x) and PM_(10) emissions,which are derived from the three simulators.In the first part of the paper we present a new procedure for incomplete drive cycle data treatment,which is necessary for real drive cycle acquisition in high density cities.Then the models are used to obtain second by second FC and exhaust emissions.Finally,a new methodology named Cycle Analysis by Ordered Power(CAbOP)is presented and used to compare the results.This method consists in the re-ordering of time dependant data,considering the wheel mechanical power domain instead of the standard time domain.This new strategy allows the 5 situations in drive cycles to be clearly visualized:hard breaking zone,slowdowns,idle or stop zone,sustained speed zone and acceleration zone.The complete methodology is applied in two real drive cycles surveyed in Barcelona(Spain)and the results are compared with a standardized WLTC urban cycle.
