We originally wrote about this electric luxury car back in 2009 when Cadillac unveiled the initial design of the Converj Concept coupe. Cadillac has just announced that they will be putting the extended-range, electric luxury coupe into production and re-named it the Cadillac ELR.

Production development of the ELR is just underway, so details on performance, price and timing will be announced later.

The Cadillac ELR will feature an electric propulsion system made up of a T-shaped lithium ion battery, an electric drive unit, and a four-cylinder engine-generator. It uses electricity as its primary source to drive the car without using gasoline or producing tailpipe emissions. When the battery’s energy is low, the ELR seamlessly switches to extended-range mode to enable driving for hundreds of additional miles.

“The concept generated instant enthusiasm,” said Don Butler, vice president-Cadillac Marketing. “Like other milestone Cadillac models of the past, the ELR will offer something not otherwise present – the combination of electric propulsion with striking design and the fun of luxury coupe driving.”

Cadillac selected the name ELR to indicate the car’s electric propulsion technology, in keeping with the brand’s 3-letter international model naming convention.

Cadillac will reveal another new concept car today, at a special event prior to the annual Pebble Beach Concours d’Elegance. Cadillac also recently announced it will add two new vehicles to its product lineup in 2012, the XTS large luxury sedan and an all-new luxury compact sedan codenamed ATS.

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