Posted: February 17th, 2022
Batteries Used in UAV
Ranging from hand-launched micro- Unmanned aerial vehicles (UAVs) and drones comes in all sizes, to large scale versions which are utilised for electric motors, internal combustion engine, jet propulsion. High energy, weight ratio, and also discharge high rates, vibration, resilience to shock and also fuel gauging to indicate are the standard requirements for UAV remaining mission time. In three essential form factors Li-ion cells come and these are: prismatic, flat Lithium polymer cells and cylindrical. The cylindrical 18650 cell, is the most commonly used in the Li-ion cells and aluminium can or steel are utilised. Sometimes laminate cells are also known as the Lithium Polymer (Li-Po) cells that are just 0.1 mm thick, can be encased in flexible aluminium foil laminate pouches versus the 0.25 to 0.4 mm metal wide cans used with prismatic cells or cylindrical traditionally. Li-Po is the cell of choice for most of the UAV due to its lighter packaging. Li-Po cells are available in a variety of sizes and is the most significant advantage. Often the manufacturing process and custom – sized is easily configurable because of the Li-Po cells and in a myriad of sizes and these cells are available. Over conventional cylindrical or prismatic cells, most UAV manufactures have a bias toward using the Li-Po cells. Continuously, the high-rate N.M.C. or L.F.P. Li-Po cells can support a 20 c rate discharge. This enables or allows fewer cells, fast charge per battery pack. The energy density of these cells unfortunately are lower than the Li-Po moderate cells. Li-Po cells are slightly more expensive per watt-hour compared to prismatic or cylindrical Li-ion cells, for several reasons. As electrode materials, lithium batteries use embedded lithium compounds. The voltage platform of Lithium batteries is high. The service life of these batteries are relatively long and can reach more than six years as a positive battery with lithium phosphate. For all these reasons li-ion batteries are most used by UAVs. Of around 15 degrees celsius manufactures recommend to store. (Angurala, et al.2021).
Continuously, the number of drones on the market is increasing. In Li-ion batteries, over-charge and over-discharge are the two externally created events that may cause problems. At cathode, over-charging creates gassing and heat buildup when approximately 4.6V, cells reach. Against overcurrent, there are various circuit protection options available to help guard drone batteries over-temperature protection for Li-Polymer cells is critically essential. For several purposes the UAV is controlled remotely. For surveillance purposes these aerial vehicles are used mainly by the military. Powered by batteries, drones are aerial robots. For drones the most popular battery operated is Li-Po or Lithium Polymer Battery.
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