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| A comparative investigation into charging point selection at a station in Bijie, Guizhou |
| HE Kangwei, YUAN Guitao |
| SINOPEC Sales Co., Ltd. Guizhou Petroleum Branch, Guiyang 550002 |
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Abstract In response to the evolution of megawatt-class charging standards for commercial vehicles and the requirements for the construction of electric heavy-duty truck charging stations, this paper takes an electric heavy-duty truck charging station in Bijie, Guizhou, as its subject of study, and conducts a comparative analysis of the technical bottlenecks, economic viability and engineering applicability of integrated and split-type charging piles. The study finds that the power output per charging point has evolved from the early 3.3 kW to the megawatt level (1 MW+), whilst the surface heat flux density of air-cooling at 360 kW reaches 0.36 W/cm2, approaching the physical limit; liquid cooling technology is therefore an inevitable trend for achieving ultra-fast charging. Quantitative comparisons show that for a 8 parking spaces (16-guns) installation, although the equipment procurement cost of the split-type solution is slightly higher, optimizing the low-voltage layout results in cable costs that are 130 900 yuan lower than the integrated solution, a reduction of 37.6%, leading to an overall reduction in initial investment of approximately 1.45%. Based on a comprehensive analysis of reliability and flexibility, the following selection principles are recommended: for sites with limited space, where individual vehicle battery capacity is ≤425 kW∙h and construction efficiency is a priority, integrated charging piles should be the preferred choice; whereas for high-traffic stations with future requirements for power upgrades, the split-type charging stack should be selected to achieve better overall life cycle investment benefits and investment protection.
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Received: 22 April 2026
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| Cite this article: |
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HE Kangwei,YUAN Guitao. A comparative investigation into charging point selection at a station in Bijie, Guizhou[J]. Electrical Engineering, 2026, 27(9): 73-77.
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| URL: |
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https://dqjs.cesmedia.cn/EN/Y2026/V27/I9/73
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2026, Vol. 27 
