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arXiv 2401.03124eess.SYcs.SY
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均衡还是不均衡?面向电动汽车电池老化感知的主动单体均衡

To Balance or to Not? Battery Aging-Aware Active Cell Balancing for Electric Vehicles

Enrico Fraccaroli, Seongik Jang, Logan Stach, Hoeseok Yang, Sangyoung Park, Samarjit Chakraborty

AI总结:

针对电动汽车电池单体容量不均及主动均衡引发老化的问题,提出“磨损均衡感知”的主动均衡优化策略,在维持驾驶能力的同时最小化电池老化。

摘要:

由于电动汽车电池包内的制造差异和温度梯度,其中各单体的容量随时间衰减的程度各不相同。这会降低电池的可用容量——一个或多个单体的电荷量可能处于最低阈值,而大多数其他单体仍有剩余电量。主动单体均衡(即在各单体之间转移电荷)能够均衡它们的电荷量,从而增加电池包的可用容量。但执行均衡意味着额外的电荷转移,这会导致能量损失和单体老化,类似于存储技术中因写入导致的存储老化。本文研究何时应最优地触发单体均衡,以在维持必要驾驶能力的同时最小化老化。具体而言,我们提出了单体均衡的优化策略,同时最小化其对老化的影响。借用存储领域的术语,我们将此称为“磨损均衡感知”的主动均衡。

英文摘要:

Due to manufacturing variabilities and temperature gradients within an electric vehicle's battery pack, the capacities of cells in it decrease differently over time. This reduces the usable capacity of the battery - the charge levels of one or more cells might be at the minimum threshold while most of the other cells have residual charge. Active cell balancing (i.e., transferring charge among cells) can equalize their charge levels, thereby increasing the battery pack's usable capacity. But performing balancing means additional charge transfer, which can result in energy loss and cell aging, akin to memory aging in storage technologies due to writing. This paper studies when cell balancing should be optimally triggered to minimize aging while maintaining the necessary driving capability. In particular, we propose optimization strategies for cell balancing while minimizing their impact on aging. By borrowing terminology from the storage domain, we refer to this as "wear leveling-aware" active balancing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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