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Types of power lithium-ion batteries and their development profile

by:Vglory      2021-04-11
All types of electric models are based on the knowledge of batteries, especially model airplanes. More than 20 years have passed, and great progress has been made in power lithium-ion batteries. Ni-MH batteries, lithium batteries and lithium polymer batteries have appeared one after another. What is a power lithium-ion battery? A model that uses an electric motor as an engine is called an electric model, and the battery that drives the motor is called a power lithium-ion battery. It is very different from batteries for other purposes and is crucial to the performance of model airplanes. Types and development of power lithium-ion batteries There are many types of batteries that can be used as power sources for airplane models, such as solar batteries, silver-zinc batteries, lithium batteries, nickel-cadmium batteries, and nickel-hydrogen batteries. The output current of solar cells is very small, and for electric model airplanes to fly, they must be very large. Silver-zinc batteries have high specific energy (watt hours/kg) and high current discharge capacity, short service life, expensive, easy to leak, and cannot be dumped. In the past, they were only used in recorded flights. At present, nickel series (including nickel-metal hydride batteries and nickel-cadmium batteries) and new lithium batteries (including lithium batteries and lithium polymer batteries) are important varieties used on model aircraft. In the 1970s, electric model airplanes became popular in Europe and the United States, mainly because there were already powerful nickel-cadmium batteries that could be repeatedly charged and discharged into practical use and batch processing. Ni-MH batteries, which came out more than ten years later, have 50% to 100% advantages over nickel-cadmium batteries in terms of specific energy. However, in terms of high current discharge capacity, nickel-cadmium batteries have been significantly behind for a long time. However, at the beginning of the 21st century, nickel-metal hydride batteries and nickel-cadmium batteries are as good as or even better than nickel-cadmium batteries, plus their memory effect is small, and environmental pollution is small. Recently, they have been widely used in aircraft models and have become one of the mainstream varieties. . Europe has banned the use of nickel-cadmium batteries, and my country is also phasing out such batteries because they will seriously pollute the environment. In the early days, lithium batteries could only be used as disposable batteries and could not be recharged. Their specific energy is very high, but their internal resistance is very high, so they cannot supply large currents to fly electric model airplanes. But at the end of the last century, rechargeable lithium batteries appeared, although they were expensive, and there was only enough power to make the plane fly smoothly (using silver-zinc batteries to climb). 5300 mAh -30-22.2V1-624x400c Early research on lithium batteries was important for military use. Later, driven by the huge economic interests in the civilian field, people’s attention and investment in lithium batteries made breakthroughs in the late 20th century and early 21st century. . At present, lithium batteries have eliminated nickel-cadmium batteries and nickel-metal hydride batteries in the fields of mobile phones, cameras, and laptop computers. The popularity of lithium batteries in remotely controlled aircraft models has continued for five or six years. At the beginning, foreign aviation enthusiasts tried lithium batteries used in mobile phones to fly airplanes, and achieved better battery life than nickel-cadmium batteries. Then, it attracted manufacturers from the battery and model industries. However, shortly after the lithium battery was combined with the model aircraft, its brother lithium polymer battery showed greater power in terms of high current discharge capacity, which is more suitable for aviation models. Pushing the lithium battery aside, it quickly became the power of today's model aircraft. The mainstream of lithium-ion batteries. After nearly two years of development, polymer lithium batteries have been superior to nickel-cadmium batteries and nickel-metal hydride batteries in terms of high-current discharge capacity, but their promotion is limited due to limitations in charging, maintenance, life, and price. In the long run, the aviation model battery will be the world of lithium batteries for a long time in the future. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Explain the correct use of lithium batteries for electric vehicles
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