Jukka!  Shame on you.  Fuel cells in Teslas (ones that work, are practical and 
don't cost twice as much as the rest of the car) are a pipe dream.  If you 
haven't already, I suggest you read... 
http://planetforlife.com/h2/h2conclude.html ...and the associated pages (the 
link is to the conclusion).  It is a bit dated now (2004) but the laws of 
physics and chemistry have not changed much, so the conclusion is still valid.  
H2 fuel cells as a replacement for fossil fuelled ICEs (or battery electric 
drive trains for that matter) in personal transport vehicles do not work and 
probably never will.  For a host of reasons.

Regards, MW.


On 22 Jun 2013, at 09:26, Jukka Järvinen wrote:

> Marcus, I believe you're on the right path with your thinking.
> 
> With the quickly swappable battery pack a car owner can choose which kind
> of battery to rent/lease/buy.
> 
> Even changing ones mind would be effortless. Click and go.
> 
> We will see different chemistries and battery technologies that can be
> quickly deployed and tried out. Tesla can sell this as service to battery
> developers. Vehicle users can participate and they get paid to drive the
> 'new 1000 mile' packs.
> 
> This was exactly the thing I tried to market to EV bus fleet operators. The
> vehicle donor lasts very long time if it's designed right and good
> materials are used.
> 
> Battery pack however is the weakest link and is consumed during the years.
> Since battery materials can be recycled the smartest way to make money with
> batteries is to lease the very same materials for next 50 years. Just
> recycle in between and keep it in operation as long as possible. If I
> understood right the Sinopoly press release they took this path in China.
> Smart move.
> 
> We could see also many other funny things emerging. I bet we'll see even a
> hydrogen fuel cells under Model S. The swappable system can be anything
> which provides the electricity to the vehicle. Maybe even ICE genset form
> GM ... :P
> 
> Elon has courage and resources to do things that we can only keep on
> dreaming. But I got no offer when I asked if I could buy just the donor
> Model S and make my own pack on it. :)
> 
> -akkuJukka
> 
> 
> 2013/6/22 Marcus Reddish <[email protected]>
>> 
>> Would Tesla rather find bad cells when the customer has a failure? (with
>> media fanfare)
>> 
>> Or in the leisure of their battery swap station?  It allows them to
>> maintenance the weakest part of the car without the customer even knowing
>> it.
>> 
>> Brilliant.
>> 
>> If the warranty has them on the hook with packs failing early it would be
> a
>> dissaster.  This allows them to address any battery issues quietly in
> their
>> bunker by swapping in 'good' batts.
>> 
>> If these cover the world the sheer NUMBER of tiny cells involved becomes
>> staggering...  me thinks he is getting serious wholesale battery deals..
>> 
>> 
>> 
>> On Fri, Jun 21, 2013 at 12:49 PM, Chris Tromley <[email protected]>
> wrote:
>> 
>>> I have tremendous respect for Tesla, but I think they've taken a
> seriously
>>> wrong turn here.  Swapping has been debated ad nauseum.  It's an
> enticing
>>> concept, but there are far too many ways it can fail in the real world.
>>> Elon better have something very clever up his sleeve or this will likely
>>> turn into a very visible failure.  Hopefully it just disappears quietly.
>>> 
>>> Chris

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