【作者】 塔拉；

【导师】 仇斌；

【作者基本信息】 清华大学 ， 机械工程， 2011， 硕士

【摘要】 电动汽车在环保和节能方面具有不可比拟的优势，可以有效解决传统内燃机汽车所带来的环境污染、能源短缺等方面问题。目前，在电动汽车领域，锂离子电池与其他电池相比，在能量密度、功率和综合性能等方面具有较大的优势和发展潜力，但在生产成本、寿命特性、安全性能等方面尚不能满足市场需求，短时间内还不能完全代替镍氢电池，但却是动力电池未来发展的主要方向之一。动力电池的寿命特性是各类电动汽车示范推广应用过程中的关键性能指标之一，近年来关于影响电池寿命特性的研究工作逐渐得到行业的重视。论文工作参照现有国内外电池测试规范，对镍氢电池、锰酸锂电池和磷酸铁锂电池的基本性能进行了试验研究，并在容量特性、效率特性、直流内阻特性、功率密度特性等方面进行了分析和对比，为下一步的电池建模做好了铺垫。基于PGNV等效电路模型建立了锂离子电池模型。通过试验辨识了锰酸锂电池和磷酸铁锂模型参数，并基于《USABC电池试验手册》中定义的FUDS工况对模型的仿真精度进行验证，证明PNGV模型更适用于锰酸锂电池。以电池模型为核心，建立了燃料电池混合动力电动汽车整车模型，针对中国典型城市公交循环工况进行仿真得到电池电流工作工况。以锰酸锂电池作为研究对象，通过一系列循环寿命试验研究了锂离子电池的寿命特性及其数学模型，就锂离子电池的可用容量、可用能量、库伦效率、能量效率、功率、内阻等方面在进行循环寿命试验过程中的变化进行了分析。研究了不同的SOC工作点对循环使用寿命的影响，并建立了判断锂电池寿命状态的模型，为电动汽车动力电池组的寿命特性研究工作提供有价值的参考。更多还原

【Abstract】 Electric vehicle has incomparable advantages in environmental protection andenergy-saving. Meanwhile, battery technology stands a core position of EVdevelopment. At the present time, Lithium ion battery, which is the future trend of thebattery area, can’t take the place of Ni-MH battery in a short-term, because of itsproducing cost, life cycle characteristic and safety performances. As a key index ofthe traction battery, research on life cycle characteristic of has been attachedgradually by the industry.Based on the currently existing battery test procedures, the study of battery basiccharacteristics including capacity characteristic, efficiency characteristic, internalresistance characteristic and energy power characteristic of Ni-MH battery, LiMn2O4and LiFePO4lithium ion battery had been presented in this thesis. The test dataprovided a further application for the battery modeling.The thesis developed the PNGV model of the LiMn2O4and LiFePO4lithium ionbattery. Identified model parameters and evaluated the simulation accuracy of themodel by using “Federal Urban Drive Schedule”.Then based on the battery model, developed a hybrid electric city bus model, thethesis taking the LiMn2O4lithium battery as object, conducted a series test to studythe life cycle characteristic and mathematical model. An analysis of capacity, energy,efficiency, internal resistance and power of the battery on different SOC set-point wasmade after the life cycle test. Hoping to provide valuable references for EV batterylife cycle characteristic research, the thesis provide a method to make an initialjudgment model of lithium battery life.更多还原