研究目的
To explore the integration of PV-battery system components into a single module, characterize its electrical and thermal behavior under severe conditions, and compare it with a conventional system.
研究成果
The prototype demonstrated a charging efficiency of 95.7% and safe battery operation below 45°C. Thermal losses resulted in a 1.3 W increase in power compared to a conventional system. The integration concept is feasible under harsh conditions, but design improvements are needed to address thermal management and degradation issues.
研究不足
The effect of high temperature on charge controller performance was not considered. The prototype may degrade faster due to elevated temperatures compared to a conventional system.
1：Experimental Design and Method Selection:
The prototype was tested indoors using a solar simulator to reproduce high irradiation and ambient temperature conditions. The testing involved three stages: charging, idle period, and discharging.
2：Sample Selection and Data Sources:
The prototype consists of a PV panel, four prismatic batteries, and a charge controller. A conventional system with separated components was used for comparison.
3：List of Experimental Equipment and Materials:
Solar simulator (Eternal Sun, class AAA), pyranometer (Hukse?ux), data acquisition unit (Agilent 34970A), temperature probes, IR thermometer (Fluke 568), PV panel (Blue Solar polycrystalline Silicon), charge controller (Genasun GV-5-Li-
4：2V), LiFePO4 battery packs. Experimental Procedures and Operational Workflow:
The solar simulator was turned on for 30 minutes to charge the batteries, followed by a 5-minute idle period, and then discharging at 40 W for 5 minutes. Measurements of currents, voltages, and temperatures were taken at specified intervals.
5：Data Analysis Methods:
Efficiency calculations for the solar panel and charge controller using equations provided, with data logged and analyzed to assess performance.
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data acquisition unit
34970A
Agilent
Measure currents and voltages every 20 seconds.
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IR thermometer
568
Fluke
Measure temperature of the PV panel surface.
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solar simulator
class AAA
Eternal Sun
Reproduce high irradiation conditions for testing the PV panel.
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pyranometer
Hukse?ux
Measure dynamic irradiance values during tests.
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PV panel
Blue Solar
Generate solar power for the integrated system.
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charge controller
GV-5-Li-14.2V
Genasun
Control battery charging with MPPT and constant current/voltage patterns.
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battery pack
Store energy from the PV panel and supply power to the load.
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