TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker or making a Paypal contribution here: paypal.me/SupportTMC

The Economist: Tesla's electric jitters

Discussion in 'Tesla Motors' started by Doug_G, Dec 29, 2010.

  1. Jaff

    Jaff Active Member

    Joined:
    Aug 15, 2010
    Messages:
    3,007
    Location:
    Grimsby, Canada
    Interesting article...I think the share price drop is mainly due to the lifting of the restriction on selling IPO shares.

    This quote in the article just reinforces the fact that many in business (or who write about business) are weak in their logic about understanding TM's battery science, logic, redundancy strategy, etc...

    "Whereas Tesla uses thousands of small cylindrical cells to produce one of its battery packs, many other manufacturers prefer instead to use large-format cells which are laminated and shaped like tiles. The Leaf, for instance, uses 192 cells, each about the size of a magazine. Four of the cells are combined to form a module and the car's 24kWh battery pack, which is air-cooled, is assembled from 48 modules.

    Mr Musk is not impressed and has described the Leaf's battery as “primitive”. Nissan, however, is extremely confident in its technology, not least because it has enabled the Leaf to go on sale as one of the first mass-produced electric cars. The company also supports its battery with a eight-year or 100,000 mile warranty.

    Tesla's approach to building a battery is somewhat different. It uses what are known as “18650” cells (which are 18mm in diameter and 65mm long). These cylindrical cells are widely used as the rechargeable batteries in thousands of consumer products. These small cells, reckon Tesla, allow for more efficient cooling and precise management of charging and discharging. For the roadster it assembles 6,831 of them into blocks which are used to build a 65kWh battery pack, which is liquid cooled."


    So Tesla investors should be wary of the Leaf's battery technology?...and this gives investors the jitters just because TM is a leader, not a follower?

    The article (to me) reads as condescending to TM's engineering staff ("These small cells, reckon Tesla")...like TM does not know nor has proven their battery strategy is viable...I don't know many engineers who "reckon" :biggrin::biggrin:

    TM is so much further out in front of the pack on EV battery technology...I just don't understand why the difference in battery technology is being considered in a negative premise here (when in fact is is an overwhelming positive for TM !)
     
  2. kvietor

    kvietor Model S S280 VIN 168

    Joined:
    Dec 12, 2010
    Messages:
    294
    Location:
    Lithia, FL
    more of the same.

    I've been collecting negative articles on Tesla and their accomplishments. Most if not all the authors have little or no clue as to the amount of research that went into Tesla's battery packs. Not to mention that the Roadster has been out and on the streets for two years. Tesla is now up to the 2.5 version and the changes have all been to minor performance and interior changes. The battery pack has been left unchanged. Even the Model S is using the same pack with only the shape adapted to the chassis. I'm sure there are improvements coming and may already exist but why let the cat out of the bag now? I'm waiting for my Model S to show up in my driveway so I can slam some these guys.
     
  3. qwk

    qwk Model S P2681

    Joined:
    Dec 19, 2008
    Messages:
    2,817
    Tesla's battery is superior to every li-ion battery out there in terms of price.

    I really don't know why they mention the $36k roadster battery pack price. That was a long time ago, without mass buying prices. The Model S batery packs are going to be closer to $200 per kwh. I really doubt the Leaf battery costs a mere $9k now. I think that when they mass produce them the price may be closer to that, but definately not now.
     
  4. dpeilow

    dpeilow Moderator

    Joined:
    May 23, 2008
    Messages:
    8,572
    Location:
    Winchester, UK
    You can go on Alibaba.com and get better prices on 18650s than that, so yeah, when are these so-called journalists going to actually do some research?
     
  5. mattjs33

    mattjs33 Member

    Joined:
    Oct 5, 2010
    Messages:
    321
    Location:
    Antioch, Illinois, U.S.A.
    Everybody calm down. The article is merely discussing the point that Tesla is using a different battery technology than the big boys, and asking which will prove more suitable for mass production. In fact, the article ends with the observation that some heavy hitters are betting that Tesla is right. It's not a science journal, so give them a little leeway.
     
  6. doug

    doug Administrator / Head Moderator

    Joined:
    Nov 28, 2006
    Messages:
    15,914
    Location:
    Stanford, California
  7. Doug_G

    Doug_G Lead Moderator

    Joined:
    Apr 2, 2010
    Messages:
    15,852
    Location:
    Ottawa, Canada
  8. Jaff

    Jaff Active Member

    Joined:
    Aug 15, 2010
    Messages:
    3,007
    Location:
    Grimsby, Canada
    Well, there's a first time for everything...:biggrin::wink:

     

Share This Page