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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:44 |
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Conference: Bucharest University Faculty of Physics 2021 Meeting
Section: Physics and Technology of Renewable and Alternative Energy Sources
Title:
Technical solution for reuse and recycling of laptop batteries as energy storage devices in solar power supply system for holiday houses
Authors:
Cristian PREDICA (1), Adriana BĂLAN (1,2)
Affiliation:
1) University of Bucharest, Faculty of Physics, Bucharest-Măgurele, 405 Atomistilor str., Bucharest-Măgurele, Romania
2) University of Bucharest, Faculty of Physics, 3Nano-SAE Research Centre, 405 Atomistilor str., PO Box MG-38, Bucharest-Măgurele, Romania
E-mail
cristian_predica@yahoo.com
Keywords:
batteries, energy storage devices, solar power supply system
Abstract:
The purpose of this paper is to design an integrated solar power supply system of a holiday home, as it is widely known as an inexhaustible, clean and sustainable energy source. The challenge is to capitalize on it efficiently, transform it into electricity and store it in a cost-effective way. We propose an alternative method of storing the energy generated by the photovoltaic panels, i.e. employing 18650 laptop cells recovered from spent laptop batteries. Unfortunately, most of the spent laptop batteries end up in the landfill, some of them are recycled, and others forgotten on shelves or in end-user storage rooms for long periods of time. These practices are harmful to the environment, causing additional pollution, which could be avoided by reusing these batteries. Another reason to recycle laptop cells is that the manufacturing process becomes more expensive year after year due to the global pressure on the few lithium deposits. Therefore, the first step is to dismantle spent laptop batteries into their basic components: ABS plastics, circuit board, copper wires, galvanized metal strips and 18650 battery cells, obviously. Battery cells are then integrated in the solar power supply system. The proposed solution is solar power supply with 22 250W polycrystalline photovoltaic panels as the energy generator, an MPPT charge controller with 450V dc input voltage from the photovoltaic panels, a 5.5kW inverter that transforms the energy stored into the 18650 cells from direct current into pure sinusoidal alternating current voltage and 560 18650 cells of about 4V per cell and 2A (8W stored per cell). This paper includes the full diagram of the integrated system and technical arguments for the sizing of each component.
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