The ChargeX Consortium has figured out how to automatically restart failed EV charging sessions at fast chargers so drivers don’t have to.
Every EV driver has been there. You plug in, walk away to grab food or run errands, and expect your battery to be juicing up at a DC fast charger, only to return and realize nothing happened. Maybe the session failed, or maybe the charger glitched. Either way, you’re stuck unplugging, plugging back in, and now it’s going to take twice as long to charge.
The ChargeX Consortium (National Charging Experience Consortium), which is made up of researchers from the National Renewable Energy Laboratory (NREL), Idaho National Laboratory (INL), and Argonne National Laboratory (ANL), along with industry stakeholders, has come up with a smart fix for one of the most frustrating parts of public EV charging: failed sessions.
Its new report highlights the benefits of what it calls “seamless retry” – a hands-free tech solution that automatically restarts failed charging attempts. In other words, the driver no longer needs to physically unplug and replug the charging connector when a charging session fails.
The consortium’s new tech is designed specifically for DC fast charging. The “novel mechanism” automatically resets both the EV and the charger, then restarts the session in the background, so drivers don’t have to return to the car – or even have to think about it.
Ed Watt, a researcher at NREL and lead author of the “Recommended Practice Seamless Retry for Electric Vehicle Charging” report, said, “With a seamless retry mechanism in place, an EV driver at a retail center can plug in a charging connector, provide user input data, leave to shop, and feel confident that they will return to a charged vehicle.” (Click on the report link to see the specifics of how the novel mechanism works.)
The researchers didn’t just focus on the perks of seamless retry – they also looked at potential downsides. One concern was the extra time it might take for the system to restart a failed session, which could leave drivers frustrated. To tackle that, the consortium suggests that the EV industry provide transparency in the form of real-time status updates, insights into what went wrong, and recommendations based on the type of charging failure and number of attempts made.
Going forward, as the user experience becomes clearer, more work will fine-tune seamless retry. The ChargeX Consortium will keep refining the system – developing smarter, more targeted retry methods, ironing out implementation details, and running verification tests to make sure everything works seamlessly in the real world.
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