Electric Vehicles

Published on October 3rd, 2016 | by Steve Hanley

Porsche Working On High Power Charger Network For Mission E

October 3rd, 2016 by  
 

Tesla is the leader when it comes to building a network of high-power charging stations for its customers, but now Porsche says it is working on a similar idea for its Mission E all-wheel-drive electric sports car. Porsche boss Oliver Blume tells Top Gear: “We are in contact with other manufacturers and suppliers around the world to build a fast-charging network. Everybody has the same need. It sounds easy but getting the details agreed is hard. We already have the clear technical concept. It can even work with Teslas, with an adapter.”

Porsche Mission E

At the Paris auto show this week, Porsche said progress on the Mission E is happening on schedule. The car reportedly will have 600 horsepower and be capable of dashing to 60 mph in 3.5 seconds. “The design will be very close to the concept,” said Blume. “We are working on typical Porsche features — dynamics, electric range. We’re meeting our targets from Frankfurt.”

One of those targets is the ability to add about 250 miles of range in as little as 15 minutes. That will represent 80% of the Mission E’s stated range of 310 miles on a full battery charge. To make that happen will require a charger with at least 150 kW of power. That is more than Tesla’s most powerful Supercharger, which tops out at 135 kW.

Blume says he is reaching out to other manufacturers to see if they are interested in working on fast charger infrastructure. In Paris, Mercedes boss Dieter Zetsche, owner of the most luxuriant mustache in the auto business,  acknowledged, “We are in talks with them, but the next question is do we co-operate on building power stations?” That suggests that Mercedes may have an interest in working with Porsche on the technical standards needed for such high-power chargers but may be less interested in investing in the infrastructure.

One would think that if Tesla can afford a worldwide network of Superchargers, Mercedes Benz could, but on the other hand, no major car company owns a string of gas stations. Perhaps Mercedes just doesn’t think it is up to it to make sure the drivers of its electric cars have a place to recharge them. In any event, agreeing on standards represents a major step forward.

In addition to his remarks about the high-power charging for the Mission E, Blume also told the press in Paris that his company has no immediate plans to produce a self-driving version of the Mission E. He does agree the car should have some some autonomous features so the driver can read a newspaper in traffic or have the car park itself. But when it comes to fully autonomous driving, a Porsche is meant to be driven. End of story.

Source: Teslarati





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I have been a car nut since the days when Rob Walker and Henry N. Manney, III graced the pages of Road & Track. Today, I use my trusty Miata for TSD rallies and occasional track days at Lime Rock and Watkins Glen. If it moves on wheels, I'm interested in it. Please follow me on Google + and Twitter.



  • bioburner

    oh no another car manufacturer builds their own Fast Charge network that only they can use. This is not good.

    • Fred

      No, that’s not realy Porsche’s idea. The problem is that, in order to charge at such high rates, you need a battery that can handle it. E.g. : a 20Kwh battery might be able to charge at 2 x it’s capacity, so 2C (not stricly exactly ture, but very close). So it can charge at 40-ish Kw (2×20). For the moment, only Tesla sells cars that can charge at 150Kw (e.g. : 75Kwh battery at 2C : 150Kw). So all Porsche is saying, is that they are willing to open up their chargers to cars that can handle 150 Kw.

      In fact, it would have to be a lot more than 150. Let’s say, the Mission-E consumer at a rate of 3miles/Kwh(realistic in the real world at German autobahn speeds). To travel, say 240miles, it would consume 80Kwh.
      In order to charge 80Kwh in 15 minutes, you would need a 320Kw charge speed! So, in the real world, you would need a 360Kw charging system!
      Might be possible with 800V at the same amperages (800V x 400A = 320Kw). I’m wondering if Porsche would have the complete drivetrain run at 800V, or devide it into 2x 400V. There are motors that can handle 800V. But to convert the whole drivetrain to that voltage would require designing new connectors, relays, isolation, controllers, etc,… Not impossible, but hard nevertheless…

      • bioburner

        The Porsche/VW system operates at 800 Volts which is twice the voltage of other manufactures. Therefor I would expect this system to not be compatible with other car makers BEVs. Incompatibility is based on operating voltage not charging rates or plug design. Building DCFC stations that only your brand can use does not help.

        • Fred

          This is not a new discussion. They are not the only people working on ultra rapid (800V) charging. Everybody was quite clear that the station would be able to switch between 400 and 800V, and would thus stay compatible with other EV’s (at half the rate, obviously). Either way, getting the charge times down to 15 minutes (300+Kw) would mean going to 800V anyway. Otherwise you would have to double the amperage up to 750-900amps! Good luck…

          • bioburner

            Well you seemed better informed about this than me. In the few articles I have read the 800 V feature was well discussed. Your comment is the first time I have seen the “Be able to switch to 400 V”. That feature, as you suggest, might allow other car to recharge with this equipment.
            Thanks for the info.

    • Foersom

      Nope, the 800 V charging is next generation of the CCS fast charge standard. Look up CharIn EV.

      • Fred

        Yes, i know. But Charin also said that the ultra rapid CCS chargers would keep 400V charge capability.

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