Evaluation of an in situ QAM-based Power Line Communication system for lithium-ion batteries
Evaluation of an in situ QAM-based Power Line Communication system for lithium-ion batteries
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DOI：
10.1049/els2.12033
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发表时间：
2021-06-25
影响因子：
2.3
通讯作者：
Higgins, Matthew D.
中科院分区：
文献类型：
--
作者：
Koshkouei, Mahyar J.;Kampert, Erik;Higgins, Matthew D.
电力线通信(PLC)用于将内部电池特性的高保真数据从仪表式电池内传输到外部电池管理系统(BMS)。使用PLC是有益的，因为它避免了在电池内使用复杂和重量级线束的需要。这里考虑使用高级调制，例如正交幅度调制(QAM)。利用已有的100 kHz-200 MHz频率下锂离子电池阻抗特性的实验结果，建立了一个逼真的电池模型。该模型被用来确定带有QAM的PLC作为电池电动汽车(BEV)的一种现场电池通信手段与真实世界的动态驱动轮廓相结合的有效性和最优性能。仿真结果表明，由于被测锂离子电池的电抗和内阻的显著变化，PLC系统的性能在很大程度上取决于所选择的载波频率。此外，与串联电池相比，并联放置的电池表现出降低的性能。结果表明，锂离子电池系统中基于原位QAM的PLC的最佳载波频率为30 MHz，并且对于4-QAM和更高的调制阶数需要额外的信号调理。
Power Line Communication (PLC) is used to transmit high-fidelity data on internal cell characteristics from within instrumented cells to an external Battery Management System (BMS). Using PLC is beneficial, as it avoids the need for a complex and heavyweight wiring harness within a battery. The use of advanced modulation, such as Quadrature Amplitude Modulation (QAM), is considered here. The existing experimental results of lithium-ion cell impedance characteristics for frequencies of 100 kHz-200 MHz are exploited in order to create a realistic battery model. This model is used to determine the effectiveness and optimal properties of PLC with QAM, as a means of in situ battery communication for Battery Electric Vehicles (BEVs) in combination with a real-world dynamic drive profile. Simulations reveal that the performance of the PLC system is heavily dependent on the selected carrier frequency due to the significant changes in reactance and internal resistance of the lithium-ion cells tested. Furthermore, cells placed in parallel display a decreased performance compared with cells in series. The results highlight that the optimal carrier frequency for in situ QAM-based PLC for a lithium-ion battery system is 30 MHz, and that additional signal conditioning is required for 4-QAM and higher modulation orders.