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<p>The growing demand for compact and efficient electric systems in Micro-Mobility has driven the development of highly integrated energy conversion platforms. This study presents the design and structural validation of an 8&#xa0;kW-class platform housing that integrates core power electronic components—including the internal battery system, BMS, LDC, and inverter—into a single platform housing. To ensure structural reliability, modal and nonlinear static analyses were conducted using experimentally derived material properties of SS400 steel. The modal analysis confirmed that the first natural frequency (162.3&#xa0;Hz) safely exceeds the excitation frequencies of typical Micro-Mobility applications. Nonlinear static analyses were performed under three scenarios: vertical tensile loading and lateral contact simulations in both X and Y directions. The results demonstrated that the structure meets key design criteria with sufficient safety margins, absorbing up to 233.3&#xa0;J of impact energy and remaining below critical deformation thresholds. The Y-direction showed earlier yielding due to lower stiffness, as explained using cantilever beam theory. Based on these findings, a full-scale prototype was fabricated and is scheduled for field validation in real vehicle environments. This work provides a reliable computational framework for designing and evaluating compact integrated housings for Micro-Mobility and supports safer, more robust platform development in this growing sector.</p>

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Structural Integrity Evaluation of an 8 kW-Class Integrated Energy Conversion Platform Housing for Micro-mobility

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • Ku Yong Kim,
  • Ki Bum Lee

摘要

The growing demand for compact and efficient electric systems in Micro-Mobility has driven the development of highly integrated energy conversion platforms. This study presents the design and structural validation of an 8 kW-class platform housing that integrates core power electronic components—including the internal battery system, BMS, LDC, and inverter—into a single platform housing. To ensure structural reliability, modal and nonlinear static analyses were conducted using experimentally derived material properties of SS400 steel. The modal analysis confirmed that the first natural frequency (162.3 Hz) safely exceeds the excitation frequencies of typical Micro-Mobility applications. Nonlinear static analyses were performed under three scenarios: vertical tensile loading and lateral contact simulations in both X and Y directions. The results demonstrated that the structure meets key design criteria with sufficient safety margins, absorbing up to 233.3 J of impact energy and remaining below critical deformation thresholds. The Y-direction showed earlier yielding due to lower stiffness, as explained using cantilever beam theory. Based on these findings, a full-scale prototype was fabricated and is scheduled for field validation in real vehicle environments. This work provides a reliable computational framework for designing and evaluating compact integrated housings for Micro-Mobility and supports safer, more robust platform development in this growing sector.