Re: [EVDL] CALB bolt terminals getting hot -

[Martin WINLOW via EV]

What, as a matter of interest, is an acceptable amount of resistance in a 
battery or cell terminal connection?  MW


On 17 Aug 2014, at 00:48, EVDL Administrator via EV wrote:

 On 16 Aug 2014 at 14:04, Lee Hart via EV wrote:
 
 The technique has been described many times on the EVDL. It must be in 
 the archives somewhere. Before I type it all in yet again, maybe we can 
 find it?
 
 Here's one method.
 
 http://www.evdl.org/archive/index.html#nabble-td4657626|a4657642
 
 Just to be clear, he means you should measure voltage drop across the 
 intercell link cable or strap, NOT across the cell or battery itself!
 
 I usually measure the voltage drop from the center of the battery post to 
 the clamp itself.  That's easy with lead batteries - there's lots of post 
 area for contact.  I don't know whether that's the case with your lithium 
 cells.  But the principle remains - pass a known current through the 
 connection and measure the voltage drop.   Calculate the resistance (if you 
 care) with Ohm's law.  Or just look for connections with exceptionally high 
 voltage drop.
 
 David Roden - Akron, Ohio, USA
 EVDL Administrator

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Re: [EVDL] CALB bolt terminals getting hot -

[Martin WINLOW via EV]

At EVERY connection?  In a 120V lithium pack that 's 38 x 9 = nearly 350W of 
heat!  Sounds a lot and I'm pretty sure my battery box didn't ever get *that* 
hot!  But then, I suppose that would only be under acceleration... my normal 
cruising current was less than half that but that's still 150W.  Still sounds a 
bit high?   MW


On 17 Aug 2014, at 09:07, Cor van de Water via EV wrote:

 Depends on your current.
 Typically I would say in the order of magnitude of 0.1 mOhm (milliOhm)
 because a 300A current will then give 30mV drop, which produces
 300A x 0.03V = 9 Watt of power loss as heat.
 
 Cor van de Water
 
 
 -Original Message-
 From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Martin WINLOW
 
 Subject: Re: [EVDL] CALB bolt terminals getting hot -
 
 What, as a matter of interest, is an acceptable amount of resistance in
 a battery or cell terminal connection?  MW
 
 

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Re: [EVDL] EVLN: 100+ U.S. National 'Drive Electric Week' Events Planned 9/15-21

[robert winfield via EV]

here is a google docs link from an engineer who did a cost analysis of a honda 
oddsey vs a tesla and other high end large vehicles to decide on a tesla EV 
that is free for downloading.
It's so expensive! well, do a total cost of ownership...
https://docs.google.com/spreadsheet/pub?key=0AnTJaKTgGoNLdGF6TDJmaVp0LWlPQk8zY1JNMWM2QkEoutput=html

On Sun, 8/17/14, brucedp5 via EV ev@lists.evdl.org wrote:

 Subject: [EVDL] EVLN: 100+ U.S. National 'Drive Electric Week' Events Planned 
9/15-21
 To: ev@lists.evdl.org
 Date: Sunday, August 17, 2014, 7:29 AM
 
 
 
 % National Plug-In Day was changed to Drive Electric Week %
 
 
http://www.greencarreports.com/news/1093832_national-drive-electric-week-planned-for-september-with-100-plus-events
 National 'Drive Electric Week' Planned For September, With
 100-Plus Events
 By Stephen Edelstein  Aug 13, 2014
 
 [image  
 
http://images.thecarconnection.com/lrg/national-plug-in-day-2012_100403203_l.jpg
 National Plug-In Day 2012: San Francisco, with 60 Nissan
 Leafs in front of
 the Golden Gate Bridge
 
 
http://images.thecarconnection.com/lrg/national-plug-in-day-2013-nissan-leafs-at-cupertino-ca-photo-by-corine-van-deventer-geljon_100442345_l.jpg
 National Plug-In Day 2013: Nissan Leafs at Cupertino, CA
 (Photo by Corine
 van Deventer-Geljon)
 ]
 
 If you're an electric car fan, mark your calendar for
 roughly a month from
 now.
 
 In 2011, several organizers looking to promote electric cars
 started
 National Plug-In Day--but apparently one day is no longer
 enough to contain
 advocates' enthusiasm for electric cars.
 
 National Drive Electric Week will take place September 15 to
 21, with 113
 events already scheduled in dozens of cities across the U.S.
 and Canada.
 
 Each event will promote plug-in cars, educating both
 potential buyers and
 the general public about zero-emission vehicles, and how
 they work in
 everyday driving.
 
 As with the National Plug-In Day events in 2011, 2012, and
 2013, National
 Drive Electric Week is a joint project of the advocacy group
 Plug-In
 America, the Sierra Club, and the Electric Auto Association.
 
 
 Previous years' events included plug-in car rallies, test
 drives,
 information sessions, and plenty more.
 
 There are already a few interesting activities planned for
 this year as
 well.
 
 In San Diego, participants will be able to test drive
 different electric
 cars, and grill owners about the ins and outs of plug-in
 ownership.
 
 On the opposite coast, electric cars will join the 2014
 Boston Cup classic
 car show on the city's famous Common. A 1913 Bailey Electric
 Roadster will
 be displayed alongside the latest plug-ins.
 
 A full list of events (searchable by ZIP code) is available
 on the National
 Drive Electric Week website. Take a look to see if there's
 something
 happening in your area.
 
 So if you want to learn more about electric cars, grab a
 notebook and make
 time to head over to the nearest event.
 
 After all, you've got an entire week.
 [© greencarreports.com]
 ...
 https://driveelectricweek.org/events.php
 National Drive Electric Week
 ...
 
http://www.greencarreports.com/news/1067433_national-plug-in-day-roundup-report-of-electric-car-events
 2011
 ...
 
http://www.greencarreports.com/news/1079390_national-plug-in-day-draws-thousands-of-electric-car-fans-inquiries
 2012
 ...
 
http://www.greencarreports.com/news/1087304_national-plug-in-day-roundup-of-electric-car-activities
 2013
 
 
 
 
 For all EVLN posts use:
 
http://electric-vehicle-discussion-list.413529.n4.nabble.com/template/NamlServlet.jtp?macro=search_pagenode=413529query=evlnsort=date
 
 
http://cleantechnica.com/2014/08/12/japan-give-away-hydrogen-fuel-cell-vehicles/
 Japan's Plan To Give Away h2 fcvs
 
 
http://transportevolved.com/2014/08/13/toyotas-fuel-cell-car-pay-twice-much-per-mile-prius-hatchback/
 Toyota’s fcv Co$t$ Twice as Much per Mile Than a Prius
 hev
 
 
http://theenergycollective.com/josephromm/455271/tesla-trumps-toyota-why-hydrogen-cars-can-t-compete-pure-electric-cars
 Tesla Trumps Toyota: Why Hydrogen Cars Can't Compete With
 Pure Electric Cars
 ...
 http://thinkprogress.org/climate/2014/08/13/3467289/tesla-toyota-hydrogen-car/
 Tesla Trumps Toyota Part II: The Big Problem With h2 fcvs
 
 
http://www.nytimes.com/2014/08/14/automobiles/an-epic-road-trip-in-an-electric-tuk-tuk.html
 An Epic Road Trip in a Solar Electric Tuk Tuk
 
 http://www.centralvalleybusinesstimes.com/stories/001/?ID=26496
 Getting an eVgo charge out of grocery shopping
 +
 EVLN: BYD T5  T7 electric logistics trucks r:250mi
 ts:30mph
 
 
 {brucedp.150m.com}
 
 
 
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