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Illustration: Sarah Grillo/Axios

Newly introduced electric vehicles are capable of charging wirelessly rather than tethered to a power cable, a technology that could one day help autonomous EVs stay running around the clock.

Why it matters: The ability to charge whenever they have a chance — through wireless charging source pads embedded in roadways and parking spots — would make AVs more efficient because they would never have to be taken out of operation for refueling.

How it works: These systems rely on resonant charging, which transfers electricity across an air gap between two magnetic coils and then to the vehicle's battery. It's a larger-scale version of technology already available for cell phones.

The catch: Significant public and private investment will be required to expand wireless source pads beyond private homes and offices and into roadways, especially to support electric AVs in ride-sharing and delivery fleets.

  • Automakers will have to make sure their vehicles are compliant with industry standards for interoperability, while state and local governments will need to install wireless charging infrastructure along streets and in public parking facilities and residential areas.

Where it stands: Last year, the SAE announced a new recommended specification for wireless and plug-in electric vehicles, putting wireless charging on track for standardization. A number of car models in production now include wireless charging capabilities: BMW's 530e hybrid, Hyundai's new Kona, Porsche's Mission E and Audi's e-tron SUV.

  • Standardization will help automakers scale production and ensure that any future charging infrastructure supports all brands. Early EVs had different plug-in charging connectors, an inconvenience automakers are eager to avoid going forward.
  • The industry is expected to ratify the new SAE standard and its equivalent in China in 2019.

What to watch: As electric AVs are more widely deployed, charging stations could be run by municipalities working directly with utilities or by private companies with franchised locations, on the model of gas stations and convenience stores.

Alex Gruzen is the CEO of WiTricity, which develops technologies for wireless energy transfer.

Go deeper

Obama stumps for McAuliffe, urges Virginians not "to go back to the chaos"

Photo: Win McNamee/Getty Images

Former President Barack Obama framed a Nov. 2 gubernatorial race as a bellwether for the Democratic Party and the country, telling a crowd at a campaign event for Terry McAuliffe on Saturday that "I believe you, right here in Virginia, are going to show the rest of the country and the world that we're not going to indulge in our worst instincts."

Why it matters: With just over a week to go before Election Day in the Commonwealth, McAuliffe is bringing out the big guns. The 44th president appeared on the campus of Virginia Commonwealth University to urge supporters to get to the polls.

Bryan Walsh, author of Future
4 hours ago - Politics & Policy

Axios AM Deep Dive: America’s murder surge

Photo illustration: Sarah Grillo/Axios. Photo: Erik McGregor/LightRocket via Getty Images

Homicides rose at the fastest rate in at least six decades last year. This Axios AM Deep Dive, led by Future correspondent Bryan Walsh, looks at the state of gun crime.

8 hours ago - Politics & Policy

Senate Democrats target billionaires

Illustration: Annelise Capossela/Axios

After failing to get a deal on other planned tax increases, key Senate Democrats are pivoting to a billionaires' income tax to pay for President Biden's social spending.

The big picture: No advanced economy has attempted anything similar on such a scale.