Research that could lead to Recharging EVs as Quickly as a Gas station fill up.
Ford and Purdue University researchers have taken an essential early step to make recharging EVs time-saving and straightforward.
Through a research alliance, researchers from both groups are working to develop a new, patent-pending charging station cable that could combine with in-development vehicle charging technology, making it even easier for people to transition to EVs with seamless recharging.
“Today, chargers are limited in how quickly they can charge an EV’s battery due to the danger of overheating. Charging faster requires more current to travel through the charging cable,” said Michael Degner, senior technical leader, Ford Research and Advanced Engineering.1 “The higher the current, the greater the amount of heat that has to be removed to keep the cable operational.”
Purdue researchers focus on an alternative cooling method by designing a charging cable that can deliver an increased current. The cable uses liquid as an active cooling agent, which can help extract more heat by changing phase from liquid to vapor – the key difference between this and current liquid-cooled technology on the market.
This innovation could one day deliver significantly more power than today’s leading systems to recharge electric vehicles, making the potential of faster recharging times possible if vehicle charging and other technology enhancements are made in parallel. Ultimately, this could eventually lead to recharging EVs as quickly as conventional gas station fill-ups.
The idea for this technology originated based on the Ford team’s understanding of the challenges faced going to faster charging rates and Purdue researchers’ area of expertise. The teams regularly collaborate to review the latest results and give feedback on areas of focus as the technology is developed.
“Electric vehicle charging time can vary widely, from 20 minutes at a station to hours on an at-home charging station, and that can be a source of anxiety for people who are considering buying an electric vehicle,” said Issam Mudawar, Betty Ruth and Milton B. Hollander Family professor of mechanical engineering, Purdue University. “My lab has come up with a solution for situations where the amounts of heat that are produced are beyond the capabilities of today’s technologies.”
Mudawar says his lab intends to begin testing a prototype charging cable in the next two years to determine more specific charge speeds for certain models of electric vehicles.
“Ford is committed to making the transition to electrification easy,” said Degner. “We are glad to work closely with Purdue’s research team, which has the potential to make electric vehicle and commercial fleet ownership even more appealing and accessible.”
The alliance with Ford and Purdue is part of hundreds of strategic alliances the company has with university professors worldwide. Providing graduate students with opportunities to work on real world-challenges helps them develop their skills while introducing Ford to students who may choose to start their career at the company.
“The research that we are conducting in a project such as this is really advanced, and we view it as a benefit for us, the future of charging electric vehicles and as a pipeline to young talent – and we’ve seen success in doing this,” said Ted Miller, Ford’s manager of Electrification Subsystems and Power Supply Research. “Students get engaged, they like the work they’re doing, and it’s a sustained investment in their laboratories while helping us solve problems.”
While the fast-charging cable won’t be on the market for some time as research continues, Mudawar has been developing ways to more efficiently cool electronics for the past 37 years by taking advantage of how liquid captures heat when boiled into a vapor.
“Ford has been actively involved in battery research and electric vehicles dating back to the days of Henry Ford and Thomas Edison,” Miller said. “We’ve secured more than 2,500 U.S. patents in electrification technologies and we have more than 4,000 more pending. So working with Professor Mudawar and his students is the perfect fit to help us research the charging solutions of the future.”