利用阻尼振荡电路优势的高频交流加热器,适用于低压锂离子电池

IF 3.2 Q2 CHEMISTRY, PHYSICAL Energy advances Pub Date : 2024-09-25 DOI:10.1039/D4YA00303A
Joachim Oehl, Andreas Gleiter, Daniel Manka, Alexander Fill and Kai Peter Birke
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引用次数: 0

摘要

在许多情况下,电动自行车和电动摩托车等轻型电动车辆使用的电池没有主动热管理系统。当这些电池存放在零度以下的环境中需要充电时,就会面临挑战。在这种情况下,有必要将电池移到温度较高的地方,让电池适应后再充电。然而,这并不总是可行的,尤其是对于永久安装在车辆中的电池。在这项工作中,我们介绍了一种用于 48 V 电池的内部高频交流加热器,它适用于欧盟 L1e 和 L3e-A1 等级的轻型电动汽车,供电功率可达 11 kW。我们利用阻尼振荡电路的特点来提高加热器的性能。此外,通过一根有三个绕组的电缆,只在主电流路径上增加了一个小电感器。此外,由于加热器的电力电子装置是电池主开关的一部分,因此电池内部所需的额外部件较少,因此与其他加热器相比,可以降低成本和减少空间。在所选的设置中,我们的加热速度可达 2.13 K min-1,仅用电池可用容量的 3.1%,就能将电池温度从 -10 °C 提升到 10 °C。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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A high frequency alternating current heater using the advantages of a damped oscillation circuit for low voltage Li-ion batteries

In many cases, batteries used in light e-mobility vehicles such as e-bikes and e-scooters do not have an active thermal management system. This poses a challenge when these batteries are stored in sub-zero temperatures and need to be charged. In such cases, it becomes necessary to move the batteries to a warmer location and allow them to acclimatize before charging. However, this is not always feasible, especially for batteries installed permanently in vehicles. In this work, we present an internal high-frequency AC heater for a 48 V battery, which is used for light electric vehicles of EU vehicle classes L1e and L3e-A1 for a power supply of up to 11 kW. We have taken advantage of the features of a damped oscillating circuit to improve the performance of the heater. Additionally, only a small inductor was added to the main current path through a cable with three windings. Furthermore, as the power electronics of the heater is part of the battery main switch, fewer additional parts inside the battery are required and therefore a cost and space reduction compared to other heaters is possible. For the chosen setup we reached a heating rate of up to 2.13 K min−1 and it was possible to raise the battery temperature from −10 °C to 10 °C using only 3.1% of its own usable capacity.

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