A little off topic and unrelated to Brainchip. Nevertheless, I find it interesting because two interesting fields overlap here for me.
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Face recognition algorithms for aging determination
April 14, 2022
The German Federal Institute for Materials Research and Testing (BAM) has developed a method that uses algorithms from
face recognition to determine the aging of Li-ion batteries. The method is intended to help produce long-lasting, safe batteries and improve their environmental performance.
Lithium batteries are particularly susceptible to aging processes. During each charging and discharging process in an electric battery, lithium ions become deposited in the electrodes of the cell like in the pores of a sponge. Over time, however, the filigree structures become fractured and cracked. As a result, more and more lithium ions no longer fit into the hollow spaces of the "sponge"; instead, they accumulate in piles around the electrodes and hinder the movement of other ions. The performance of the battery decreases.
The pile formations show characteristic patterns in the process: because lithium occurs in nature in two different isotopes. "We now know that the distribution of lithium isotopes in a cell is directly related to its age state," explains Carlos Abad, head of the project. The chemist and his colleague Dalia Morcillo have analyzed this distribution in more detail using spectral analysis.
This involves exciting lithium ions with light, which they absorb to varying degrees. "The images of these isotope spectra are almost indistinguishable to the naked eye," explains Dalia Morcillo. "
They resemble each other like the faces of twins."
This gave the team the idea of using algorithms from face recognition for the evaluation. As a result, the researchers have found a method to quickly determine the isotope distribution in a cell.
"In the next step, we want to provide companies that produce lithium batteries with a fast and inexpensive method to
evaluate the aging behavior of their batteries already in the laboratory," says Carlos Abad. "This should make it possible to make batteries more durable and ultimately more sustainable in the future."
https://www.elektroniknet.de/automo...gorithmen-zur-alterungsbestimmung.195385.html