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Design of an energy storage unit for fuel-cell and hybrid-electric vehicles.

机译：燃料电池和混合动力汽车的储能单元设计。

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This dissertation describes an ESU design methodology capable of minimizing the volume, weight and cost of the MES and ESU (i.e., battery pack, ultracapacitor pack and PE interfaces) while allowing for the implementation of power management in a cost-effective manner. The proposed ESU design methodology is based on a holistic approach that includes the vehicle performance requirements and allows for the optimization of the ESU with respect to predetermined goals of minimum volume, weight and cost.; Substantial weight and volume reductions are accomplish when combining batteries and ultracapacitors even when considering the efficiencies of the PE interfaces. The optimized BU-ESU achieved a volume reduction of over 37% (from 135 liters to 84 liters) and a weight reduction of over 66% (from 333 kg to 148 kg) when compared to a 'classic' BO-ESU design.; The benefits of the optimized BU-ESU are not limited to weight and volume reductions since sweeping the battery cost in {dollar}/kW predicts that the BU-ESU provides the lowest cost path to meet the vehicles energy and power requirements. Additional benefits, such as improve ESU efficiency, vehicle acceleration, regenerative braking capabilities, and battery life are also identified in this research work.; The proposed ESU design and optimization procedure also includes the associated PE interfaces by selecting and designing the most suitable converter topology. The design is carried out by encompassing the wide output-to-input voltage ratio variation and output power typical on this automotive application. The comparison process identifies the half-bridge converter topology as the most cost-effective converter topology for this application. A novel design approach that incorporated a ratio defined as transitioning power ratio is proposed to overcome shortcoming of the 'classical' approach. This novel design approach allows the minimization of inductor size requirements and current stresses present in active components when designing converters with wide output-to-input voltage ratio.
机译：本论文描述了一种ESU设计方法，该方法能够最小化MES和ESU的体积，重量和成本（即电池组，超级电容器组和PE接口），同时允许以经济高效的方式实施电源管理。提议的ESU设计方法基于整体方法，其中包括车辆性能要求，并允许在最小体积，重量和成本的预定目标方面优化ESU。当组合电池和超级电容器时，即使考虑到PE接口的效率，也可以显着降低重量和体积。与“经典” BO-ESU设计相比，经过优化的BU-ESU体积减少了37％（从135升降至84升），重量减少了66％以上（从333 kg降至148 kg）。优化的BU-ESU的好处不仅仅限于减少重量和体积，因为以{dollar} / kW的电池成本来衡量，BU-ESU提供了满足车辆能量和功率需求的最低成本途径。这项研究工作还确定了其他好处，例如提高ESU效率，车辆加速，再生制动能力和电池寿命。通过选择和设计最合适的转换器拓扑，建议的ESU设计和优化过程还包括相关的PE接口。通过涵盖该汽车应用中典型的宽输出电压比变化和输出功率来进行设计。比较过程将半桥转换器拓扑确定为该应用中最具成本效益的转换器拓扑。为了克服“经典”方法的缺点，提出了一种新颖的设计方法，该方法结合了定义为过渡功率比的比率。当设计具有宽输出电压比的转换器时，这种新颖的设计方法可以使电感尺寸要求和有源组件中的电流应力最小化。

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