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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.

Submit your questions for Autoblog Podcast #366 LIVE!

We're set to record Autoblog Podcast #366 tonight, and you can check out the topics below, drop us your questions and comments via our Q&A module, and don't forget to subscribe to the Autoblog Podcast in iTunes if you haven't already done so. To take it all in live, tune in to our UStream (audio only) channel at 10:00 PM Eastern tonight.
Discussion Topics for Autoblog Podcast Episode #366
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Anti-union group files lawsuit against VW and UAW

The fight for unionization at Volkswagen's Chattanooga, TN, factory isn't letting up. Yesterday, the National Labor Relations Board decided to allow anti-United Auto Workers employees at the plant the right to defend voting down the measure. Now, a group called the National Right to Work Foundation has filed a federal lawsuit on behalf of five workers against VW and the UAW for allegedly working together to organize.
The group says in a release that it wants "to block further collusion between the company and the United Auto Workers." It alleges that VW forced workers to attend "mandatory pro-union meetings" and prevented managers from opposing. In a rebuttal on its website, the UAW called the claims "baseless" and said its actions were entirely legal.
One possible problem faces the carmaker in regards to the lawsuit. According to the Detroit Free Press, a recent US Court of Appeals ruling found that neutrality agreements like the one the business had with the UAW could be illegal if the company provided "things of value" to the union. The newspaper also claims that VW held a mandatory employee meeting concerning the election, but workers were free to leave during the UAW's presentation.