How does lithium battery solve the battery life problem of wearable devices?

How do lithium batteries solve the fatal problem of wearable devices? Wearable devices have become a popular technology, but battery life has become a problem for many scientists and manufacturers. 1. Converting static electricity into usable electrical energy Recently, a team from the National University of Singapore (national university of Singapore) announced a small flexible device that can convert sudden static electricity into usable electrical energy. One end of the device touches the skin surface, and the other end is covered with a layer of gold silicon film. Both ends of the device have a cylindrical silicone rubber, which can output more power and allow a larger area to contact with the skin. Wearable device power supply The group presented their research results at the 2015 IEEEMEMS conference and proved that burst current can power some devices. By installing the device on the subjects' arms and throat, they can produce voltages of 7.3v and 7.5v by clenching their fists and speaking, respectively. As the toilet paper is constantly rubbed, the maximum voltage can reach 90v, which can be directly used to light up the LED light source. The team plans to announce larger batteries in the future so that they can use more of the energy generated by human skin friction. In addition to this resistance to battery energy, there have been many other forms of research in the world before. For example, a new type of tattoo can convert human sweat into electricity, and perhaps our chin can be converted into a generator through special earphones. There seem to be many options for solving the power supply problem of wearable devices in the future. 2. New tattoo: sweat turns into electricity. On August 16, Joseph Wang, a researcher at the University of California, San Diego, invented a temporary smart tattoo that can generate electricity from sweat, and one day Power for mobile phones and other wearable devices. Smart tattoo power supply This kind of tattoo will stick to your skin, detect the level of lactic acid in your sweat, and then use the lactic acid to make a micro fuel-powered battery. When we reach the level of fatigue, muscles usually have a burning sensation, which is related to the accumulation of lactic acid. As far as muscle is concerned, lactic acid is a waste product and the end point of metabolism. Exercise physiologists can now detect lactic acid levels in muscles or blood. When lactic acid is released from sweat, new sensing technologies are developed. Wang's smart tattoo includes a sensor that can attract electrons from lactic acid, which can trigger an electric current. Wang estimated that 70 microwatts of electric current can occur per square centimeter of skin. The researchers added the battery to the lactic acid sensor to capture and store current, and then form the so-called biofuel power cell. Whether you are driving or walking, the more you sweat, the more lactic acid you experience, which means your battery can store more energy. At present, this kind of tattoo can only produce a small amount of energy, but the researchers hope that this biofuel-powered battery will one day produce enough energy to drive a smart watch, heart rate monitor or smart phone. Motorola also invented a temporary tattoo that can be used to unlock mobile phones. Maybe it's the next must-have accessory for your phone, maybe it's just a little ink on your body. Solar cells Solar cells are not just used in large-scale applications such as power plants and street lights. We will see tiny solar cells that power wearable devices. Solar watches without batteries have been in existence for many years. EnergyBioNIcs has recently developed a solar watch, which can not only meet the needs of its own, but also other devices. One problem with using solar cells in wearable devices is that the device requires light to generate electricity, and once the light is blocked, such as under a sleeve, it cannot generate electricity. But from another perspective, it also makes solar cells a good choice for smart clothing, because the flexible battery can even be sewn directly into the fabric. The design goal of traditional solar cells is much stronger sunlight than traditional indoor light sources. In order to solve this problem, some new materials have been announced that can generate electricity indoors, and the electricity is very advanced. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete.