Battery bag with rectangular holes
Liangbing hu / teng li
A sharp and flexible battery filled with strategically placed holes is more breathable than cotton. This can be a perfect source of energy Portable sports or fitness devices built directly into clothing.
“This is particularly useful for athletes or individuals who wear electronics for long periods of time. Smart trackers, medical monitoring devices and similar applications that require similar comfort and reliable performance,” he says. Lin xu at Yale University.
To design the new batteries, Xu and his colleagues created a pattern of long, rectangular holes in a pocket battery – a licensed type that is a flat array with limited thickness. The simulation showed how the array of rectangular holes allowed the battery to stretch or bend 180 degrees without tearing, compared to alternative hole patterns with squares or circles.
“One challenge was keeping enough active material to maintain the high energy density of the battery – too many or too large holes would reduce the energy storage capacity,” says Xu. “We had to balance mechanical stretch with electrical performance.”
10 When stretched or bent by 10 percent, the folded battery design could still withstand physical stress and still power the LED bulbs – they did it 100 times with the stretching and bending experiments. Testing in the temperature and humidity chamber also showed that the battery was twice as breathable as cotton.
As a practical demonstration of possible uses, the researchers deployed the battery in a lab coat and tested its wear and tear performance during exercise. With his holes enabled the battery To dissipate the heat quickly, so it will not feel strong or sweat on the skin of the food.
The battery still needs more wear and tear testing, so the researchers want to test it in commercial health monitoring devices and sports gear.
They are researching how the best production is the biggest production. Automated manufacturing should allow for consistent holes and sealing in the battery pocket to prevent leaks or short circuits.
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