Optimal Design and Management of a Hybrid Energy Storage System
Optimal Design and Management of a Hybrid Energy Storage System
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混合储能系统的优化设计与管理
DOI：
10.1109/cdc40024.2019.9029184
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
K. Shin
中科院分区：
文献类型：
--
作者：
Eugene Kim;K. Shin
电动汽车（EV）由大量电池单元供电，必须有效/高效地管理这些电池单元以在其保修期内提供所需的电力/能量。电动汽车的运行需要来自其电池组的大而波动的功率，但其电池单元对（放电）充电压力的耐受性有限，加速了它们的退化。此外，电池单元根据其在电池组中的物理位置而具有不同的充电（放电）应力，从而导致不同的劣化速率以及因此不平衡的健康状态（SoH）或充电状态（SoC）。为了解决这个问题，我们设计、实现和评估了一种新型的能量存储系统，该系统具有能量缓冲器和SoC平衡电路，以延长电池寿命和电动汽车的运行时间。我们首先设计了一个混合能源存储系统，有效地满足电动汽车的代表性的权力要求。然后，我们开发了一个最佳的功率分配，以最大限度地减少电动汽车的能源消耗和电池的压力。我们对该解决方案进行了原型设计和评估，结果表明放电/充电压力降低了约21.8%，从而延长了电池寿命，同时平衡了电池的SoC。
Electric Vehicles (EVs) are powered by a large number of battery cells, which must be managed effectively/efficiently to deliver the required power/energy during their warranty period. An EV’s operation requires large and fluctuating power from its battery pack, but its battery cells have only limited tolerance to (dis)charge stress, accelerating their degradation. Moreover, battery cells have different (dis)charge stresses depending on their physical positions in the battery pack, causing different degradation rates and thus the unbalanced State-of-Health (SoH) or State-of-Charge (SoC). To address this problem, we design, implement and evaluate a novel energy storage system with energy buffers and an SoC-balancing circuit, to extend both the battery life and EV’s operation-time. We first design a hybrid energy storage system that efficiently meets the EV’s representative power requirement. We then develop an optimal power distribution to minimize the EV’s energy consumption and its battery cells’ stress. We prototyped and evaluated this solution, demonstrating a reduction of discharge/charge stress by about 21.8%, and thus extending battery lifetime while balancing cells’ SoC.