One question: "Ludicrous mode" how much current does it need from the pack and which prismatic/pouch cells can deliver it? In a single string? There is a reason that the Tesla pack is built the way it is. I am not saying that it can't be done with other cells, just that the extreme power density also requires extreme batteries, or an architecture that allows standard batteries to deliver extreme power. Tesla chose the last option.
Cor van de Water Chief Scientist Proxim Wireless office +1 408 383 7626 Skype: cor_van_de_water XoIP +31 87 784 1130 private: cvandewater.info http://www.proxim.com This email message (including any attachments) contains confidential and proprietary information of Proxim Wireless Corporation. If you received this message in error, please delete it and notify the sender. Any unauthorized use, disclosure, distribution, or copying of any part of this message is prohibited. -----Original Message----- From: EV [mailto:[email protected]] On Behalf Of Mark Abramowitz via EV Sent: Tuesday, March 01, 2016 7:29 AM To: robert winfield; Electric Vehicle Discussion List Subject: Re: [EVDL] EVLN: Batteries are King (A Gigafactory Challenge) There's a lot of junk out there, and we see many posted here. Seeking Alpha quality ranges from trash to outstanding highly nuanced analyses. You can't paint their articles with a broad brush, you really need to independently judge the quality of the piece. Sent from my iPhone > On Mar 1, 2016, at 6:09 AM, robert winfield via EV <[email protected]> wrote: > > Really? giving credence to Seeking Alpha articles?You may also want to point out that a Bolt, with a 60kWh battery is much smaller than a Tesla S60 (same size battery, with barely the same range and a Bolt with an L3 port can get 90 miles range in 1/2 hour, while a Tesla with a supercharger can get 170 miles in 1/2 hour. About twice the range in the same time (roughly 400v @300 amps)The tesla battery pack also provides torsional and such strength to the entire frame with the skateboard designIf an individual clyndrical cell fails in the tesla battery pack, it is bypassed and barely noticed. If a prismatic or a pouch battery fails there is a large difference. > > From: brucedp5 via EV <[email protected]> > To: [email protected] > Sent: Tuesday, March 1, 2016 6:36 AM > Subject: [EVDL] EVLN: Batteries are King (A Gigafactory Challenge) > > > > http://seekingalpha.com/article/3936476-tesla-gigafactory-challenge > Tesla: A Gigafactory Challenge > Feb. 26, 2016 Frank Greenhalgh > > [images > https://staticseekingalpha.a.ssl.fastly.net/uploads/2016/2/3860661_14564 468182045_0.jpg > The Tesla Model S Battery Pack (uncovered) > > https://staticseekingalpha3.a.ssl.fastly.net/uploads/2016/2/3860661_1456 4468182045_2.png > singular unit Bolt Battery Pack > ] > > In 2014 Tesla announced the "Gigafactory," the answer to high battery > prices. > > The Chevrolet Bolt demonstrates the advantages of prismatic cells. Fewer > cells, easier to cool and cheaper. > > Tesla should consider also manufacturing prismatic cells in the Gigafactory > for the Model 3. > > The Gigafactory > > In their December 2014 10-Q report, (page 11) Tesla announced: > > We believe that the Tesla Gigafactory will allow us to achieve a major > reduction in the cost of our battery packs of greater than 30% on a per kWh > basis by the end of the first year of volume production of Gen III. The > total capital expenditures associated with the Tesla Gigafactory through > 2020 are expected to be $4-5 billion, of which approximately 2 billion is > expected to come from Tesla. > > True to form, Tesla had decided to vertically integrate further, by > manufacturing their own batteries. At that time battery pack prices were > approximately $300/kWh, so a 30% saving would reduce the costs to $210 a > kWh. The Model 3 will probably use a 50kWh batt _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
