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Cadillac CT6 PHEV battery shape a big departure for GM's plug-in hybrid tech

Anyone with any familiarity with the electric powertrain details for the two General Motors plug-in hybrids will have noticed that the information we have about the newly announced Cadillac CT6 plug-in hybrid has a lot of numbers in common with the Chevy Volt and the Cadillac ELR, like the 18.4-kWh lithium-ion battery pack and an expected all-electric range of 37 miles. We also noticed that the announcement calls the plug-in CT6 hybrid an actual plug-in hybrid and not an "extended range electric vehicle (EREV)," which is what GM calls the Volt and the ELR. This, of course, means we needed to ask GM some questions. Donny Nordlicht from Cadillac communications told AutoblogGreen that while the Volt and CT6 batteries are both 18.4-kWh, the shape is completely different. In the Volt/ELR, the battery is T-shaped (see it here). The CT6 has four seats, with a tunnel running between the two in the rear, as you can see here, but the battery in the CT6 PHEV is "a cube-shaped pack, which is between rear seats and the trunk," Nordlicht said. "There is no pass through." GM has not yet released any technical schematics about this pack, but Nordlicht said that, "The CT6's advanced mixed-material platform was designed to accommodate the PHEV system by design so that it minimally intrudes on the cabin space." It also means that the CT6 can be ordered as an optional PHEV, while the Volt and ELR were purpose-built plug-ins. GM is also distinguishing between the EREV and PHEV powertrains in its vehicles from this point forward. "We are not discarding the EREV language," Nordlicht said. "The CT6 utilizes a two-motor system mated to a 2.0T 4-cylinder engine, which is an all-new system to Cadillac." We assume that the PHEV packs will use li-ion cells from LG Chem, just like the EREVs do, but Nordlicht did not answer our question on that point. As for other details about the CT6 PHEV – like production, full dimension, and pricing – we will just have to wait until closer to when the vehicle launches for those. Related Video:

GM Design shows what could have been and what might be

We periodically like to check in with GM Design's Instagram account to see what they're cooking up. Even better is when we catch a glimpse of an alternate history of what legendary designers from The General's past were thinking, though those ideas may not have made it into production. This week, for example, the account posted some illustrations from George Camp, whose career at GM spanned nearly four decades, from 1963 to 2001. One of the renderings is of what appears to be a 1971-72 Pontiac GTO Judge, but with two headlights instead of the production unit's quad beams. The rear departs from the canonical version most dramatically, with a massive integrated wing. Other bits that didn't make the production cut include large side vents, a gill-like side marker and rectangular intakes below the headlights that wouldn't be out of place on a modern design today. Amazingly, from what we can make out of the date, it appears that the drawing was done sometime in 1965, which makes it quite prescient.           View this post on Instagram                       A post shared by GM Design (@generalmotorsdesign) There's also a very aerodynamic interpretation of a Corvette ZR-1. To our eyes it splits the difference between the 1986 Corvette Indy concept and a fourth-generation F-body Pontiac Firebird, so perhaps parts of Camp's work on this sketch did make it into physical form. There's also a radical sports car concept from May 1970 that resembles the Mazda RX-500 concept from the same year, a Syd Mead-looking Cadillac coupe, and an Oldsmobile with a cool take on the company's trademark waterfall grille and elements of the Colonnade Cutlass at the rear. Other recent posts include a FJ Cruiser-like off-road EV, a sleek coupe with the Chevy corporate grille, and a rendering of a Silverado-esque pickup that looks far better than the current production version.           View this post on Instagram                       A post shared by GM Design (@generalmotorsdesign) It's pretty easy to lose hours in the account, but it's always fascinating to see GM's visions of what could have been and what might be. Related Video:

Cadillac confident attitude will attract the elite to ELR plug-in hybrid [w/video]

Cadillac is not going to pull any punches when it comes to promoting its plug-in hybrid ELR. In the real world, the company is showing off the Wreath And Crest's coupe with Chevy Volt technology at exclusive events with "groups whose members are affluent, green-minded and have an appreciation for design and innovation," says Automotive News. That evidently means young Hollywood celebrities and other well-to-do demographics. As Cadillac global chief Bob Ferguson recently told the industry publication, "If you live on the West Coast and you're an architect and you've given to environmental causes, you're probably going to hear about the ELR. We have sliced and diced who is likely to buy this vehicle." "We have sliced and diced who is likely to buy this vehicle" - Cadillac's Bob Ferguson In the realm of advertising, Cadillac evidently thinks a fast-talking, USA-USA-USA! Type-A personality is just the kind of guy who will convince those celebrities and architects to buy one. For proof, look no further than the star of this new ELR ad called Poolside that Cadillac is airing during the Olympics. There are almost no details about the ELR in this ad, just a whole lot of attitude mixed with humor (the "We got bored" line is funny). In fact, there's almost no indication that the ELR is an extended-range hybrid at all. Short of a brief moment where our hero, actor Neil McDonough, unplugs his car from its charging station, you'd probably never know it's got an EV mode at all. That's undoubtedly a calculated bet by Cadillac, whose ad execs have undoubtedly noted that most electric cars are not selling well with an eco-first message, so they appear to be going with style and swagger instead. Scroll below to see what we mean. The ELR has a starting MSRP of $75,000, and at that price, it's already out of reach for most Americans. Automotive News suggests that annual ELR production is likely to be just shy of 5,000 units, so Cadillac could be on stable ground trying to appeal to such a limited number of buyers. What type of buyers? Well, that remains to be seen. Related Gallery 2015 Cadillac ELR: First Drive View 25 Photos News Source: Cadillac, Automotive News - sub. req. via YouTubeImage Credit: Gallery images copyright 2014 Michael Harley / AOL Green Cadillac Electric Hybrid PHEV cadillac elr elr poolside