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<p>This study investigated an adsorption thermal battery (ATB) system as a supplementary heating and cooling source for electric vehicles, designed with dimensions of 80 × 320 × 750 mm to provide 1 kWh thermal output. Using silica gel-water as the working pair, CFD simulations were performed on unit cells (10 EA, 20 EA, 30 EA) and extrapolated to full-scale (800 EA) performance for 2-hour daily commuting operation. The 800 EA system with reference fin configuration achieved thermal charging in 192 minutes and delivered 459.02 Wh during 2-hour discharge. Optimizing fin density to 50 % increased charging time to 207 minutes but significantly enhanced output to 557.13 Wh (21.4 % improvement). Material comparison revealed that silica gel provided 65.8 % higher thermal energy output than activated carbon, despite 14.6 % slower charging, attributed to its higher density and adsorption enthalpy. These findings establish critical trade-offs between thermal charging time and energy output capacity for optimizing ATB systems in electric vehicles.</p>

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Study for heat storage and utilization performance of adsorption thermal battery for electric vehicles

  • 期刊论文

  • 发表日期：

    2026年7月6日

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  • Jinwook Choi,
  • Tao Wang,
  • Seolha Kim

摘要

This study investigated an adsorption thermal battery (ATB) system as a supplementary heating and cooling source for electric vehicles, designed with dimensions of 80 × 320 × 750 mm to provide 1 kWh thermal output. Using silica gel-water as the working pair, CFD simulations were performed on unit cells (10 EA, 20 EA, 30 EA) and extrapolated to full-scale (800 EA) performance for 2-hour daily commuting operation. The 800 EA system with reference fin configuration achieved thermal charging in 192 minutes and delivered 459.02 Wh during 2-hour discharge. Optimizing fin density to 50 % increased charging time to 207 minutes but significantly enhanced output to 557.13 Wh (21.4 % improvement). Material comparison revealed that silica gel provided 65.8 % higher thermal energy output than activated carbon, despite 14.6 % slower charging, attributed to its higher density and adsorption enthalpy. These findings establish critical trade-offs between thermal charging time and energy output capacity for optimizing ATB systems in electric vehicles.