2012 Volkswagen Jetta on 2040-cars

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VW decides against active-cooling system for e-Golf lithium battery

When the 2015 VW e-Golf was introduced at the LA Auto Show last year, VW said it would come with a water-cooled battery. During the Detroit Auto Show, when the car was trotted out again, VW released a new press release that stripped out the "water-cooled" language, but this change went unnoticed. During a recent VW event in Germany, a friend from Green Car Reports realized that the battery on display did not seem to have any water-cooling mechanisms. That set us off on a bit of a sleuthing and we have now learned that VW is not going to include any active cooling in the upcoming e-Golf. In fact, the company is entirely confident that this car - because of what it's designed to do - doesn't need it. "The need for a cooling system wasn't there" - VW's Darryll Harrison VW has been working on an electrified Golf for ages now, and so changes to the plan are to be expected. But battery cooling is vitally important not just to keep the car operating properly but because when things get too hot, there can be serious public relations problems. Nissan began testing a new battery chemistry for the Leaf in 2013 after an uproar from warm-weather EV drivers in Arizona who were experiencing worse-than-expected battery performance. The Leaf has always used an air-cooled battery, which is another way to say that there is no active cooling system (more details here). Tesla CEO Elon Musk once said this approach is "primitive." So, why is VW following the same path? We asked Darryll Harrison, VW US's manager of brand public relations west, for more information, and he told AutoblogGreen that VW engineers discovered through a lot of testing of the Golf Mk6 EV prototypes, that battery performance was not impacted by temperatures when using the right battery chemistry. That chemistry, it turns out, is lithium nickel manganese cobalt oxide (NMC) in cells from Panasonic. These cells had "the lowest self-warming tendency and the lowest memory effect of all cells tested," Harrison said. He added that VW engineers tested the NMC cells in places like Death Valley and Arizona and found they didn't warm very quickly either through operation, charging (including during fast charging) or through high ambient temps. "The need for a cooling system wasn't there," Harrison said.

To solve diesel problem, VW might need two fixes

Volkswagen says that a fix is on the way for its 11 million vehicles around the globe that are equipped with diesel engine software that can evade emissions tests. The problem might be far more complicated than simply creating a single solution for all of them, though. According to Automotive News citing Reuters, two remedies to cover different NOx-reducing systems could be necessary, and both potentially affect performance. Earlier examples of the EA 189 diesel engine used a lean NOx trap to reduce the harmful material coming from the tailpipe. According to experts in the Automotive News report, a software update might allow the engines to achieve compliance, but that could affect fuel economy. VW already tried this route once before the scandal came to light, but tests by the California Air Resources Board still showed the figures were too high. Later, some of the 2.0 TDI engines began using Selective Catalytic Reduction that reduced NOx by injecting a urea solution into the exhaust stream. According to Automotive News, a software update for this equipment might increase the amount of the substance used. Not only would that mean topping up the fluid more often, but there still could be some reduction in fuel economy. But, since the 2-liter, 4-cylinder TDI engine that sits inside the diesel vehicles first mentioned as being affected by the issue in the US don't have a urea treatment system, VW would need to install them into these cars. VW still hasn't officially outlined its solution (or solutions) to the emissions issue but is expected to soon. The automaker's long-term evasion of regulations with these diesel engines pumped vast quantities of additional NOx into the air. The substance is known to be linked with smog and acid rain. The US Department of Justice is already beginning an investigation into the company, and politicians are pushing for harsh punishments.

2015 Volkswagen GTI: Clicking, beeping, and trying to stay cool [w/video]

My first car didn't have air conditioning. Well, that's not entirely true. The car had A/C, it just didn't work. Nevertheless, I survived summer after summer of sweating behind the wheel – par for the course in a 15-year-old Mitsubishi with 235,000 miles on the odometer. But it's another thing entirely when that same experience happens in a 2015 Volkswagen GTI after just 7,000 miles of use. That's how Autoblog kicked off summer with the long-term GTI: sweating in plaid seats. The car went to Suburban Volkswagen in Troy, MI, where the technicians told me the air-con just needed a recharge (despite asking them to inspect it further). They recharged it, the air blew cold, and 48 hours later, the A/C stopped working again. (Surprise!) The problem was a leak in the compressor/condenser line, so a new one was installed, the system was charged, and now it's fixed. For real this time. Unfortunately, that second-coming happened during a road trip with editor-in-chief Mike Austin at the helm. His logbook comments are, as you'd expect, appropriately salty. "Everybody loves the GTI, right? Not quite. I drove to Toronto for a weekend. On the way home, the A/C quit working. This wasn't too much of a problem until we hit the border control line to re-enter the United States. I always pick the slow line, somehow. Thusly baked in the heat, with outside temperatures above 80, the GTI didn't cool back down for the rest of the trip. Then I learned we already fixed the A/C once." "Of course, any car on that day with a surprise A/C failure would earn my ire," Austin notes. "It just seems a little more irritating on a new car. Otherwise, yeah, this is a great car." A great car, indeed. Everyone loves spending time with the GTI. It's got plenty of power, it's quiet, it's comfortable, and it eats up highway miles. We've got just over 10,000 miles on the odometer as of this writing, and as summer carries on, many editors have requested extended periods of seat time in the GTI for weekend getaways and longer road trips. But it's still not perfect. Following the A/C fiasco, there's another, more curious problem plaguing the GTI. Every time the car starts, a weird, varied-tempo, loud clicking is heard from the dash. We think it's coming from the direction of the glovebox, and it's not the same click patten every time. Sometimes it's one or two knocks, sometimes it's several. See what I mean in the video below. Weird, right? Another trip to Suburban Volkswagen offered no help.