充电时间和驾驶范围的问题阻碍了电动汽车的广泛采用。为了对电动汽车行业中这些问题的当前状态进行审查,在线发表的一篇论文Journal of Energy Storage已经对50多项快速充电策略进行了评论。
学习:Review of fast charging strategies for lithium-ion battery systems and their applicability for battery electric vehicles。图片来源:scharfsinn/shutterstock.com
范围焦虑
Problems with charging time and driving range have led to what is commonly termed “range anxiety.” This is preventing drivers from switching to their internal combustion vehicles to new, greener electric alternatives.
充电基础设施并没有与新电动汽车的销售保持同步。特斯拉报告说,收费点的不均匀分配是他们的主要问题。Tesla Model S报告的范围超过320公里,这意味着驾驶员将其达到充电点以增强电池的担忧已减少,而对于短途旅行来说,这根本不必担心。
Their Model S also has the capability to completely recharge its batteries within 28 minutes.
但是,范围焦虑是电动汽车吸收的有效障碍(特斯拉报告似乎不是一个因素),为了克服这种看法,必须增加充电基础设施,并减少充电时间。
减少充电时间
在内燃烧车辆附近实现充电时间是电动汽车行业研发的重点,以克服范围焦虑。
Currently, commonly installed charging points take a few hours to provide a full charge for batteries. Even with increasing driving ranges reported for EVs currently on the road, this is problematic. Sales of electric vehicles are increasing, but not at the rate necessary to move the automotive industry away from fossil fuels.
Limitations of Batteries
Whilst it is pertinent to drastically improve charging times for widespread uptake of electric vehicles, it is not simply a case of increasing the level of current used to charge them. This can cause disproportionate aging of lithium-ion batteries, leading to power, capacity, and safety issues during journeys. Fast charging operates at the physical limits of lithium-ion batteries and decreasing charging times is not an easy task.
近年来考虑的众多选择之一是简单地增加所使用的电池数量,但是即使这可以改善充电时间,同时保持当前速度恒定,但增加电池的重量会严重影响车辆的性能。该解决方案是不可持续的。
Problems at the battery level include lithium accumulation and deposition at the anode-electrolyte interface, heat generation and control, gas evolution, solid electrolyte interphase growth, electrolyte decomposition, and localized volume changes that can lead to particle cracking and mechanical tensions. These effects during operation severely impact the performance, safety, and longevity of lithium-ion batteries.
电动汽车充电问题
视频来源:Wendover Productions/YouTube.com
正在进行改善电池材料和充电时间的研究,最近的研究有一些积亚博网站下载极的结果。已经在材料,细胞和系统水平上研究了快速充电。还从算法的角度进行了调查。
调查快速充电的当前状态
为了完全了解快速充电策略的当前状态,在新论文中研究了超过50项当前的研究。这项研究为填补该领域的知识差距做出了一些贡献。
在快速充电和控制参数期间的限制摘要。此外,还进行了有关当前方法的文献概述,评估和比较每种方法并提供对当前现场健康状况的认识。此外,该研究评估了研究差距,以强调需要进行进一步研究的需求,这将有助于快速实现商业级别的快速充电应用程序。
在论文中探索并介绍了有关可测量和不可衡量的外部和内部电池状态的启发式和模型的研究。该团队比较和评估了数据驱动的模型,特征图,电化学模型和物理增强模型。
根据这项研究,文献中的几种方法提出了有关电池健康的快速充电的解决方案,但是这些方法尚未得到全面证明其在汽车行业中的应用。
The Significance of the Paper
通过对该领域的当前知识进行审查,本文为汽车行业提供了可行的解决方案,以解决快速充电和设计不受充电方法负面影响的电池设计的问题。这将为未来的快速充电基础设施推出,以满足不断变化的汽车行业的需求。
进一步阅读
Wassiliadis, N et al. (2021)Review of fast charging strategies for lithium-ion battery systems and their applicability for battery electric vehicles[在线的]Journal of Energy Storage| sciencedirect.com. Available at:https://www.sciencedirect.com/science/article/abs/pii/S2352152X21009981
马歇尔,D(2021)特斯拉模型如何杀死范围焦虑[在线的]motorbiscuit.com. Available at:https://www.motorbiscuit.com/how-the-tesla-models-s-could-kill-kill-range-anxiety/
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