In recent years, with the development of science and technology, drones have expanded from the military field to the civilian sector, especially in agriculture, forestry, power, security and other aspects that are widely used in the civilian sector. While UAVs are becoming more widely used, there are a large number of UAVs on the market, but these UAVs have an obvious problem - limited endurance.
At present, the drones on the market mainly use lithium polymer batteries as the main power, and the endurance is generally between 20 minutes and 30 minutes. Due to technical differences, most of the battery life is within 45 minutes. But the charging time is more than an hour. Since the drone needs to reduce the take-off weight as much as possible, it is impossible to carry a heavy-weight large-capacity battery. After most drones are maintained for ten to twenty minutes, someone must replace the battery or plug in the charging cable. It is necessary to carry three or four batteries when going out. This is a deadly short board for the development of drones, which greatly limits the overall development of China's drone industry. To promote the sustainable development of the drone market, it is extremely urgent to solve the battery life of drones.
The battery life problem of drones is a short board that limits the development of the drone industry. It is also a technical problem that the development of drones in the world needs to be overcome. At present, there are roughly the following directions for solving the problem of battery life of drones:
First, the fuel cell
(1) The first multi-axis drone using hydrogen fuel cells
In May 2015, HUS Corporation of Singapore developed the first multi-axis UWH HYCOPTER with hydrogen fuel cell. It can fly for 4 hours under no-load conditions. Even under 1Kg full load, it can support 150 minutes, far exceeding lithium battery. To drive the drone's battery life.
Due to the use of hydrogen fuel cells, the structure of HYCOPTER is somewhat different from that of other drones. In addition to hydrogen fuel lithium polymer batteries, there are two tubular containers for storing hydrogen, which can store up to 4L of hydrogen. During the working process, hydrogen gas is introduced into the interior of the hydrogen fuel cell. After the chemical reaction, the electric power is generated to supply electric power to several rotors. The HYCOPTER filled with hydrogen is equivalent to the 3Kg lithium battery in terms of electric quantity. Unfortunately, HYCOPTER is still in the research and development stage and has just been tested.
(2) Intelligent Energy hydrogen fuel cell
In December 2015, the Dajiang Matrice 100 drone equipped with Intelligent Energy hydrogen fuel cells flew for more than an hour. If you use a standard battery, this drone can only fly for 20 minutes on a single charge. Hydrogen fuel cells convert hydrogen into electricity through chemical reactions, while by-products are simply water vapor. Since the fuel is stored in a small box and the fuel cartridge is replaced in a few seconds, the drone can quickly refuel and lift off when the fuel is exhausted.
Intelligent Energy will showcase the results of the project at the Consumer Electronics Show (CES) in Las Vegas next January. The company hopes that this product will attract drone manufacturers and use fuel cells as an option for drone power. The company has no plans to offer modified products to the average user.
Second, solar panels
(1) In 2010, the British "Hefeng" ultra-light solar unmanned aerial vehicle installed solar panels in flight and used land-based laser power to increase the flight time of the drone, creating a flight time record of the 14-day unmanned aerial vehicle.
(2) In June 2014, the world's largest solar-powered aircraft, Sunshine Power 2, made its first flight in Payerne, Switzerland. The aircraft has 17,000 ultra-thin and high-efficiency solar panels mounted on its wings, with a wingspan of up to 72 meters. A solar-powered aircraft is an aircraft that uses solar radiation as a propulsion energy. The power unit consists of a solar battery pack, a direct current motor, a speed reducer, a propeller, and a control device. Due to the low energy density of solar radiation, in order to obtain sufficient energy, solar aircraft must have a large surface area for ingesting sunlight. The solar panels absorb energy during the day, allowing the aircraft to fly in the evening, greatly improving the flight life.
Third, lithium battery innovation
In September 2015, Tesla Tesla, a leader in electric vehicles, announced a prototype of a drone specifically for aerial applications. Tesla is obviously more sophisticated in terms of rechargeable batteries. It is reported that the drone is equipped with a 10000mAh battery, which can last for 60 minutes on a single charge and the charging time is about 20 minutes.
Tesla, which has unique skills in the battery field, enters the drone market and is bound to have a huge impact on domestic drone batteries. Who doesn't want to have a drone battery with a short charging time and long battery life? However, at present, this highly anticipated product is still in the stage of conceptual design, and it is still inconclusive when the product comes out.
Research on battery life of drones is endless. The current situation is mostly in research and development. In the future, there will be new unmanned battery life technology unpredictable, and the practicality is not known. However, the drone battery life technology is full of enthusiasm and enthusiasm. I hope that these drone battery life technologies will be able to live up to expectations, and break the drone battery life shortage, which restricts the drone to play a bigger role.
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