Scientists in the United States have created a test platform for energy shelter in solar-plus storage systems under extreme temperatures ranging from -180 C to 300 C.
A research team led by scientists from Purdue University in the United States has developed a test platform for solar-plus storage systems that work under extreme temperatures, within a range of -180 C to 300 C.
As the first experiment with the platform, the scientists tested a PV system equipped with a lithium ion battery (LIB) in a temperature range of -105 C and 80 C. “The research introduces an integrated photovoltaic and battery (Intpb) system (Intpb) system (Intpb) system -system -system -system -system -system -system -system -system -system -system -system -system -system -system -system -system -system -system -system -system -system -system -system -system -system -system system system system system system system -system – 2.5% -efficiency A new lithium metal battery made with a niobium tungsteam oxide -cathode and 1m lifsi electrolyt, ”said the corresponding author of the research, Vilas G. Pol, said PV -Magazine.
The researchers also explained that the INTPB system was devised to make individual tests of sources of energy such as PV and nuclear batteries possible, together with energy storage technologies such as LIBs and capacitors.
The test room consists of an aluminum clamshell with a glass window, which makes lighting of the light source possible. There are two sets of nutrition ports: one for liquid nitrogen (LN2), which cools the internal components, and the other for Argongas, which keeps the room free from water vapor and any ice crystals. Heating is achieved via heating coils, while eight electric transit is provided for data collection.
The research group said that the temperature of the test room is regulated by an Instec controller in accordance with the LN2 cooling tube before the test room arrives. “In the Instec room there is a stainless steel block on which the PV and Lib are, with channels that have been drilled in which LN2 can be pumped through, cool down directly through conductive heat transfer,” said it.
“A proportional integral derivative controller controls the temperature using feedback from a thermocouple that measures the surface temperature of the stainless steel block by adjusting the speed of the LN2 scroll pump.”
The researchers specified that the system was developed as a commercially available test system that is able to test PV cells or batteries separately at a range of temperatures. They also stated that relevant commercial temperature rooms can reach up to 100 ° C, but none can fall under -100 C.
For their first test in the new platform, the team used a commercially available polycrystallijn Silicium 5 V, 30 MA PV cell, linked to a Niobium Tungsten oxide lib (nbwo || Li) COOTENCEL of 3 V. AA 5 V PV was chosen to explain the group to declare before Ruwweg 2 V of the Diënden and Ruwweg. An LED light of 9 W and 32 W was used to irradiate the device.
When discharging with the battery cycler, the battery offered similar capacities with a constant power outlet. At 80 ° C, the load capacity was 195 mAh g⁻¹ and the discharge capacity was 205 mAh g⁻¹; At 50 ° C, the load capacity was 156 mAh g⁻¹ and the discharge capacity was 162 mAh g⁻¹; At -60 ° C, the load capacity was 71 mAh g⁻¹ and the discharge capacity was 76 mAh g⁻¹; At -80 ° C, the load capacity was 53 mAh g⁻¹ and the discharge capacity was 58 mAh g⁻¹; And at -105 C the load capacity was 33 mAh g⁻¹ and the discharge capacity was 36 mAh g⁻¹. “This setup provides reliable tests, because the cargo and discharge capacities of the battery are within 5%,” the group emphasized.
“We have achieved functional charging/discharging at -120 C of 6 mAh G⁻¹ -Overhurping conventional Li ion batteries (more than 20% below -60 ° C),” Pol added.
“Follow -up research will focus on testing pocket cells under -125 ° C and integrate them with advanced perovskite solar cells, which offer higher efficiency and improved performance under extreme temperature fluctuations compared to conventional silicon solar cells.”
The system was presented in “Efficient Fotovoltaïschens integrated with innovative Li -ion batteries for extreme (+ 80 ° C to -105 C) Temperature operations“Published in Scientific reports. Researchers from the Naval Surface Warfare Center from Indiana also participated in the study.
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