Team develops new method to determine the life of lithium-ion batteries

A team of engineers from the University of Missouri has devised a new method to determine how many times you can recharge a lithium-ion battery before it needs to be replaced.

Lithium-ion batteries are common in electronic devices such as laptops and they are vital components to tram on the road. They can be recharged hundreds of times, but at some point they run out of charge cycles. That can be bad news if you’re traveling and your electric car can’t be recharged anymore.

“Lithium-ion battery capacity decreases whenever we use it and at some point we will have to replace it,” said Kangwon Seo, assistant professor of industrial and manufacturing systems engineering. it equals a new one”. “If we can figure out when it will essentially fail, then we can be better prepared.”

Traditional methods for determining time lithium-ion The final battery was based on historical recession data and theoretical assumptions. But that doesn’t take into account real-world factors like temperature and voltage.

“When we started running our laptops on batteries, temperature “M.D. Shoriat Ullah, a recent graduate who worked on this project as part of his master’s program.” If you start streaming video on your phone, rising temperatures, and the battery will die faster. In the past, most studies did not consider these other parameters. “

And some studies have looked at those factors on averages only.

What’s new in Seo and Ullah’s work is that they applied functional principal component analysis to assess the range of factors such as fluctuating temperature and voltage.

“The most important feature is functional data analysis,” says Seo. “We wanted to reflect the shape of the function, not just the mean. In this study, we really wanted to suggest that we need to consider the shape, not just the mean, to make a correct prediction. more accurate.”

Seo and Ullah outlined their method in a magazine Applied science.