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首页> 外文期刊>Applied Energy >A hybrid power-unit based on a passive fuel cell/battery system for lightweight vehicles
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A hybrid power-unit based on a passive fuel cell/battery system for lightweight vehicles

机译：一种基于用于轻型车辆的无源燃料电池/电池系统的混合动力单元

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Hybrid fuel cell/battery power-unit configurations are gaining growing attention; in fact, they offer advantages in terms of fuel cell downsizing, higher efficiency and fast fueling. In these configurations, the power-sharing is actively controlled employing power electronics, mainly boost converters, that affect the costs and performance of the system. In this work, a novel hybrid power-unit based on a passive fuel cell/battery system is proposed for a lightweight electric vehicle (5 kW nominal power). This configuration eliminates the need for costly power converters, and increases the overall performance. The hybrid power-unit consists of 5 fuel cell stacks, 6 battery modules and two resistors that allow safe fuel cell start-up and shut-down. The power profile requested by the electric motor is derived from an ARTEMIS drive cycle and tested by means of two electronic loads.The analysis on the power-unit behavior and performance has been carried out by means of a numerical model and experimental activities.The power-unit response has been analyzed focusing on: i) start-up operation; ii) drive cycle operation; iii) shut-down operation. During the whole test, the fuel cell produced about 51% of the total requested energy while the battery pack about 49%. The average stack efficiency during operation resulted to be 47%, while it dropped to 41% considering also start-up and shut-down.Results proved the technical feasibility as well as the safety of the system and showed that the developed power-unit has promising features for practical applications.
机译：混合燃料电池/电池供电单元配置越来越受到关注;事实上，它们在燃料电池缩小，效率更高和快速加油方面提供了优势。在这些配置中，积极控制电力电子设备，主要是促进转换器的功率共享，影响系统的成本和性能。在这项工作中，提出了一种基于被动燃料电池/电池系统的混合动力单元，用于轻质电动车辆（5 kW标称力量）。此配置消除了对昂贵的电源转换器的需求，并提高了整体性能。混合动力单元由5个燃料电池堆叠，6个电池模块和两个电阻组成，允许安全的燃料电池启动和关闭。电动机请求的功率分布来自Artemis驱动周期并通过两个电子负载测试。通过数值模型和实验活动，对电力单元行为和性能进行分析。电力-Unit响应已经分析了：i）启动操作; ii）驱动周期操作; iii）关闭操作。在整个测试过程中，燃料电池在电池组约49％的同时产生了约51％的所要求的能量。在操作期间的平均堆栈效率导致47％，而它考虑到启动和关闭也降至41％。结果证明了技术可行性以及系统的安全性，并显示了发达的电力单元有希望的实际应用功能。

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