In London, scientists said on Tuesday that they had for the first time looked inside a Lithium-ion (Li-ion) battery during overheating, for this they used a sophisticated X-ray imaging system, the aim of course being to make this technology safer in the future. Nowadays, the power of Lithium-ion batteries is omnipresent in the world, they are found in our mobile phones, cameras, laptops and for some years in e-cigarettes. In rare cases, they can be dangerous by producing an overheating or explosion that would cause injury or even fire.
A WAY TO PROGRESS IN THE DESIGN OF LI-ION BATTERIES
Some airlines have banned the shipment of Li-on batteries after tests have shown that the presence of a flaw on some could cause a potentially catastrophic chain reaction. In a study published in the journal "Nature Communications", scientists announced that they now have a better view on the problems that can arise with these batteries. According to the author Paul Shearing from the University of London (UCL) " This new technique provides an ability to evaluate different batteries and see how they act, degrade and eventually fail.". The team stated that “ Hundreds of millions of Li-ion batteries are manufactured each year " and " that it was important to understand what happens when their batteries fail as this is obviously the key to advancing their designs."
OVERHEATING: EXPLANATION ABOUT PHENOMENON
Using a combination of x-rays, radiography, and thermal imaging, Shearing and his team were able to describe how overheating causes pockets of gas to form inside the battery thus deforming its internal layers. Overheating can occur in the event of electrical or mechanical abuse or in the presence of an external heat source. Shearing therefore explains to us that “ Depending on the design of the cell, there is a critical temperature range which when reached will trigger more exothermic events and therefore more heat "Then" Once the rate of heat production is greater than the rate of heat dissipation in the environment, the temperature of the cell begins to rise and eventually a chain reaction of harmful events that spread and that one call " Thermal Wrapping"
VIDEO EXPLANATIONS (ENGLISH ONLY)
This article was originally published by our partner publication Spinfuel eMagazine, For more great reviews and, news, and tutorials _ **
This article was originally published by our partner "Spinfuel e-Magazine", For other news, good reviews or tutorials, click here. Translation by Vapoteurs.net
