Tesla has been looking at automating the charging process.
This has been in devlopment for some time. Ultimate aim is to have the Model S drop the driver at the door, park itself in the garage & then be plugged in & charged automatically.
http://www.theverge.com/2014/12/31/7474057/elon-musk-says-tesla-automatic-car-charger-solid-metal-snake
Others are looking at standard industrial robots.
http://hhg2tech.blogspot.com.au/2015/08/faster-charging-for-electric-vehicles.html
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