纯电动汽车直流动力电缆儿童电磁暴露安全评估*

doi:10.19562/j.chinasae.qcgc.2019.06.013

摘要/Abstract

摘要： 为评估纯电动汽车直流动力电缆对儿童乘员的电磁暴露水平,基于电磁剂量学的基本原理,利用Comsol Multiphysics有限元软件,建立了车厢、儿童人体和动力电缆的电磁模型,仿真分析了儿童乘员坐在不同位置时,其身体不同组织中的磁通密度,并将结果与国际非电离辐射防护委员会(ICNIRP)制定的标准进行比较。结果表明:普通低速驱动电流为27 A时,不同乘坐位置的儿童体内磁通密度的最大值分别为:0.18 μT(副驾位),0.182 μT(后排左),1.26 μT(后排中),17.8 μT(后排右);匀速高速驱动电流为150 A时,对应的最大磁通密度约增大至低速时的5.5倍左右。但这一暴露水平仍远低于ICNIRP推荐的限值,说明直流动力电缆在车厢内产生的电磁辐射不会对儿童乘员构成健康风险。

关键词: 电动汽车, 电磁剂量学, 儿童人体模型, 磁通密度

Abstract: To assess the level of child occupant exposure to electromagnetic field generated by DC power cables in battery electric vehicles, the models for passenger compartment, child body and DC power cables are established with finite element software Comsol Multiphysics, based on basic principle of electromagnetic dosimetry. A simulation on the models is conducted to analyze the magnetic flux density in different tissues of child body sitting on the different positions of compartment, which are then compared with the guidelines of International Commission on Non-Ionizing Radiation Protection (ICNIRP). The results show that in general low speed drive with a cable current of 27 A, the maximum magnetic flux density in child body tissues at different sitting position is: 0.18 μT (front passenger seat), 0.182 μT (left back seat), 1.26 μT (middle back seat), and 17.8 μT (right back seat) respectively, while in high-speed cruise drive with a cable current of 150 A, the corresponding maximum magnetic flux densities are around 5.5 times as high as that at low-speed drive. However, these levels are still far below the limit values recommended by ICNIRP, indicating that the magnetic flux density generated in passenger compartment by DC power cable will not cause health risk to child occupant.

Key words: battery electric vehicle, electromagnetic dosimetry, child body model, magnetic flux density

董绪伟, 逯迈. 纯电动汽车直流动力电缆儿童电磁暴露安全评估^*[J]. 汽车工程, 2019, 41(6): 696-702.

Dong Xuwei, Lu Mai. Safety Assessment of Child Occupant Exposure to Electromagnetic Field Generated by DC Power Cable in Battery Electric Vehicles[J]. Automotive Engineering, 2019, 41(6): 696-702.

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纯电动汽车直流动力电缆儿童电磁暴露安全评估^*

Safety Assessment of Child Occupant Exposure to Electromagnetic Field Generated by DC Power Cable in Battery Electric Vehicles

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