Power Line Communications for Automotive High Voltage Battery Systems: Channel Modeling and Coexistence Study with Battery Monitoring
Power Line Communications for Automotive High Voltage Battery Systems: Channel Modeling and Coexistence Study with Battery Monitoring
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DOI：
10.3390/en14071851
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发表时间：
2021-04-01
期刊：
影响因子：
3.2
通讯作者：
Jossen, Andreas
中科院分区：
文献类型：
--
作者：
Landinger, Thomas F.;Schwarzberger, Guenter;Jossen, Andreas
随着电动汽车在全球范围内越来越受到关注，续驶里程和安全性的进步变得至关重要。现代汽车电池管理系统（BMS）面临着具有挑战性的性能和安全要求，需要监控大量的电池参数。在本文中，我们提出了电力线通信（PLC）的高压（HV）牵引电池，以减少BMS布线工作。通过对频率高达300 MHz的小规模电池组进行建模，我们预测了PLC信道传输特性，并使用采用窄带单载波调制的PLC硬件演示器验证了结果。结果表明，电池PLC是一个苛刻的任务，由于低接入阻抗和电池耦合效应，但传输特性可以通过最佳阻抗匹配得到改善。PLC用于高压BMS不仅减轻了重量和成本，而且提高了BMS设计的灵活性。PLC可实现单电池监测技术，如在线电化学阻抗谱（EIS），而无需额外布线。在线EIS可用于现场状态和温度估计，节省额外的传感器。这项工作揭示了PLC和电池监控之间可能存在的共存问题。特别是，我们证明了某些PLC数据或数据包速率必须避免不干扰EIS测量。
As electric vehicles are gaining increasing worldwide interest, advances in driving range and safety become critical. Modern automotive battery management systems (BMS) compete with challenging performance and safety requirements and need to monitor a large amount of battery parameters. In this paper, we propose power line communications (PLC) for high voltage (HV) traction batteries to reduce the BMS wiring effort. By modeling a small-scale battery pack for frequencies up to 300 MHz, we predict the PLC channel transfer characteristics and validate the results using a PLC hardware demonstrator employing a narrowband single-carrier modulation. The results demonstrate that battery PLC is a demanding task due to low access impedances and cell coupling effects, yet transfer characteristics can be improved by optimal impedance matching. PLC for HV BMS not only saves weight and cost, but also improves flexibility in BMS design. PLC enables single-cell monitoring techniques such as online electrochemical impedance spectroscopy (EIS) without additional wiring. Online EIS can be used for in-situ state and temperature estimation saving extra sensors. This work unveils possible coexistence issues between PLC and battery monitoring. In particular, we demonstrate that certain PLC data or packet rates have to be avoided not to interfere with EIS measurements.