Charge the phone battery from the user's movement?

Devices such as smartphones, tablets, e-reading devices as well as personal health care devices, smart glasses and road-pointing devices have become extremely popular. While the utilities they provide are undeniable, their operations depend largely on whether they are fully charged or not.

According to a 2009 report by the International Energy Agency (IEA), the amount of electricity used for information and communication technology accounts for nearly 15% of global electricity consumption, and is expected to reach 2022. and 2030 this number will be doubled and tripled in turn, putting additional pressure on the power infrastructure.

To solve both problems, a team of researchers, headed by Georgia Institute of Technology scientist Zhong Lin Wang, has developed a portable, clean energy source that could change the way traditional batteries are charged. by electricity: using energy from the user's movement.

Charge the battery by moving.(Photo: livescience.com)

Researchers have built a backpack that can capture energy from vibrations during walking and transform into electricity. This new technology will revolutionize the charging of electronic devices and thus reduce the burden on non-renewable energy sources and free users from fixed charging devices.

The potential for energy production from human movement activities is no stranger, but traditional technologies only create heavy and vulnerable devices. In contrast, Mr. Wang's backpack contained a device made of thin and light plastic pieces that interwoven into a rhombic system.

When the person carrying it moves, the weight of the body vibrates on the surface of these plastic sheets, causing them to bump into each other and then split again. This periodic contact causes electrons to vibrate in opposite directions and generate alternate current. This is the friction effect that creates static electricity, just like when we take off a new washed fleece coat over our heads

The key to this technology is the addition of micro-charged materials that maximize the contact between the two surfaces, enhancing the output power of the device Mr. Wang calls ' friction generator. Super small ' (TENG).

'TENG works well as a magnetic generator, but is lighter and smaller than any generator used for energy conversion. Machine efficiency will only increase when more advanced new materials are invented, " Wang said.

Tests have shown that a normal person carrying a 2kg volume equivalent to 2 liters of soda walk creates enough energy to simultaneously light more than 40 LED advertising light bulbs. The maximum output energy depends on the static density on the surfaces, but the backpack can generate 2-5W of electricity, enough to charge the phone or other small devices. This invention will help those who like outdoor activities or work in the field, the army and rescue workers in remote areas.

Human activity is just one of a number of renewable clean energy sources. Last year, the team demonstrated that TENG equipment can also extract energy from seawater.