Student of the Perm National Research Polytechnic University (PNRPU) Ivan Frolov, as part of the PNRPU Inventors 2022 project competition, proposed creating a built-in self-charging system for mobile devices.
Frolov's solution suggests the possibility of integrating a small charging unit inside a smartphone or in the form of an external side, in which, by converting mechanical energy into electrical energy, a mobile device is charged during movement. The project is not designed to receive a large level of charge, but only one that, for example, could be enough to call the rescue service or loved ones.
The author explained that his solution, unlike common portable devices such as PowerBank, will have a number of advantages, including low weight and volume, as well as built-in self-charging capability. According to Frolov, this solution will provide a small charge for the smartphone in extreme conditions. It can be built into shock-resistant mobile gadgets, which, for example, are used by tourists and extreme sportsmen.
According to the description of the solution, the charging unit is equipped with a built-in pendulum, a generator and a capacitor for energy storage. According to calculations, for one shift of the pendulum, 50 mV and 200 pA of energy charge will be generated, which is enough to start charging if the user activates the process of continuous accumulation of a small amount of energy over a certain period of time.
“The technology can be adapted for use in phones, smart watches and other devices that require charging from any power source. However, today it is difficult to achieve high efficiency of a self-charging device due to the high power consumption of devices that require charging (phones, watches, etc.) and the low degree of scientific and technological progress in the field of creating microgenerators,” explained a student of the PNRPU Faculty of Chemical Technology.
On the other hand, Frolov suggests that in case of interest from customers, it is possible to start test implementation of his technology as early as 2023-2024. The problem is that for this project "there are still not enough highly qualified specialists in the field of energy technologies to help implement the device from the technical side."
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