Re: [EVDL] EV Digest, Vol 19, Issue 44

2014-05-31 Thread Lee Hart via EV
jerry freedomev via EV wrote: I've used for many EVs just a 2" length of solid copper wire sized right for the load [as a fuse]. Higher voltage, use longer. Using SS bolt/nuts as terminals and support with distance and something to catch the molten metal if it blows. That works! :-) A fuse is i

Re: [EVDL] Thermistor to use with 7cell Nimh pack.

2014-06-01 Thread Lee Hart via EV
Dennis Miles via EV wrote: I use temperature dependent protective devices using metal loaded wax which opens the circuit when the unit gets hot These are one-time thermal fuses. They do indeed get used in battery packs etc. But they are generally not replaceable -- once they blow, you are exp

Re: [EVDL] Thermistor to use with 7cell Nimh pack.

2014-06-01 Thread Lee Hart via EV
Lawrence Rhodes via EV wrote: I'm building a small 7 cell pack with two strings (14 total) of Nimh 4ah. I'll be using a generic 10 buck charger designed for 7 cells. 350 ma. I need to protect the pack. Is there a specific Thermistor that triggers at the right voltage to protect the pack? You do

Re: [EVDL] FLA battery terminals & lugs

2014-06-02 Thread Lee Hart via EV
KenA via EV wrote: The maximum amperage of my system is 500 and it typically doesn't exceed 300. Would studs and lugs usually work for that? The studs are meant for golf carts, that only draw around 75 amps average, and peaks of maybe 200 amps for a few seconds. I have tried using the studs i

Re: [EVDL] Suitcase EV.

2014-06-02 Thread Lee Hart via EV
Cor van de Water via EV wrote: Interesting, but I think I have seen similar "inventions" before "The Wizard of Speed and Time" movie by Mike Jitlov (1979) had a briefcase car. It was in fact a working prop, although not as fast as the movie makes it appear. -- I do not waste my life in fric

Re: [EVDL] FLA battery terminals & lugs

2014-06-03 Thread Lee Hart via EV
KenA via EV wrote: ...I think my use pattern may be the real culprit here. My commute is now 15 miles of mostly highway travel - typically at 55mph. It's not uncommon for me to be pulling 200+ amps for extended periods of time. From what I'm hearing, FLA in any configuration may not be a good opt

Re: [EVDL] EVLN: E-school-buses $ave school districts million$ & power the grid

2014-06-03 Thread Lee Hart via EV
brucedp5 via EV wrote: http://www.udel.edu/udaily/2014/may/electric-school-bus-052814.html Electric school buses that power grid could save school districts millions An interesting idea. But it all hinges on the utilities actually being willing to PAY a fair price for the power they take. So f

Re: [EVDL] FLA battery terminals & lugs

2014-06-03 Thread Lee Hart via EV
Jay Summet via EV wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 I have an S-10 electric conversion with 20 6 Volt golf cart batteries. They have studs. I am on my 2nd set of batteries and haven't melted any lead or had any studs pull out. Excellent! That says it can work, if everything

Re: [EVDL] Suitcase EV.

2014-06-03 Thread Lee Hart via EV
Thos True via EV wrote: Roderick Wilde drew up a basic design for a similar concept in the late '90s after traveling through airports... I remember those discussions. I suggested a motorized suitcase, and even got a fiberglass transit case to experiment with. The idea was to have a piece of l

Re: [EVDL] Suitcase EV. vs TravelScoot

2014-06-03 Thread Lee Hart via EV
brucedp5 via EV wrote: Because a 'normal' mobility scooter was such a hassle to make happen and tow around using my sedan... I found... https://www.google.com/search?q=mobility+foldable&source=lnms&tbm=isch&sa=X&ei=ffuNU9LaFtbooAT86ILIDw&ved=0CAcQ_AUoAg&biw=675&bih=638 But, all that research is n

Re: [EVDL] EVLN: Is An Electric Car A Better Value?

2014-06-04 Thread Lee Hart via EV
This one set off my BS detector: brucedp5 via EV wrote: For a truer look at what it costs to own an gas-powered vehicle versus a volt guzzler, we'll use The "True Cost To Own" feature at car education source Edmunds.com. Car: 2014 Nissan Leaf | 2014 Nissan Versa Note True Cost to Own: $35,363 |

Re: [EVDL] EVLN: Is An Electric Car A Better Value?

2014-06-04 Thread Lee Hart via EV
Willie2 via EV wrote: I bought my Leaf with no great battery concern... After two years, I was extremely disappointed to find that the Leaf battery would no longer carry me where I needed to go. Though my range decreased over 30%, Nissan refused to fix it, saying "the battery is fine"... If they

[EVDL] Batteries as thermoelectric generators

2014-06-04 Thread Lee Hart via EV
Here's an interesting idea (sorry for the long URL): http://powerelectronics.com/blog/thermogalvanic-process-converts-low-temp-waste-heat-electricity?NL=PET-01&Issue=PET-01_20140604_PET-01_786&YM_RID=leeah...@earthlink.net&YM_MID=1469693&sfvc4enews=42&cl=article_1_b "Since the voltage of recharg

Re: [EVDL] V2G at L1 is practical

2014-06-06 Thread Lee Hart via EV
Haudy Kazemi via EV wrote: V2G is a type of backfeeding; 120v L1 outlets protected by GFCIs probably won't work very well for this, but dedicated 120v outlets exempt from upstream GFCI could. No, a GFCI won't care if you are backfeeding power through it. All a GFCI does is compare the hot and

Re: [EVDL] V2G at L1 is practical

2014-06-06 Thread Lee Hart via EV
Haudy Kazemi via EV wrote: Schneider Electric says some kinds of GFCI breakers are not backfeed friendly and can in fact damage them: http://static.schneider-electric.us/docs/Circuit%20Protection/0900DB1001.pdf ---start quote--- These circuit breakers are distinctive in that they have a white “

Re: [EVDL] V2G at L1 is practical

2014-06-06 Thread Lee Hart via EV
Robert E CIV USNA Annapolis Bruninga via EV wrote: V2G will never be practical unless vehicles are plugged in all day. And if they are pluggedin all day, then they only need 120v L1 15 amp service. I agree! I just can't see how high-power V2G can be much more than a scheme to extract money as

Re: [EVDL] recommendation for light EV components

2014-06-06 Thread Lee Hart via EV
Cor van de Water via EV wrote: I am assisting someone to design a light 3-wheel EV that should be able to run city speeds, no more than 40 MPH is needed and the weight will probably be under 1000 lbs (plus occupants). Not very aerodynamic but that should not be a problem at these speeds. I hav

Re: [EVDL] V2G at L1 is practical

2014-06-06 Thread Lee Hart via EV
Peri Hartman via EV wrote: You wouldn't even need a central instruction. It could be the same V2G electronics, but only one way. That is, when there's a dip in voltage charging decreases. The bigger the dip, the more the charge shuts down. I suppose it could also react to spikes and absorb ex

Re: [EVDL] EVLN: Greenfield, MA's dicey drunk freakazoids unplugging EVs

2014-06-08 Thread Lee Hart via EV
Dennis Miles via EV wrote: My FIRST piece of advice is charging stations need to be "supervised." Vandalism is a crime. Go to the Police and swear out a complaint . Luckily, it's getting easier to install security cameras. They can gather evidence. Unfortunately, it still rarely leads to an ar

Re: [EVDL] EVLN: Greenfield, MA's dicey drunk freakazoids unplugging EVs

2014-06-08 Thread Lee Hart via EV
Peter C. Thompson via EV wrote: BTW, I finally found a press release from someone other than Qualcomm Halo - claiming 97.4% efficiency. I'll believe it when I see it. It's essentially impossible to build a *transformer* that's 97.4% efficient at this power level -- let alone the conversion lo

Re: [EVDL] EVLN: Greenfield, MA's dicey drunk freakazoids unplugging EVs

2014-06-08 Thread Lee Hart via EV
Cor van de Water via EV wrote: I doubt that the two achievements coincide... they probably were able to push 22kW across an inductive link (at much greater loss than the claimed 2.6%) and the claimed efficiency is only for the inductive power transmission, and does not take into account any elect

Re: [EVDL] Exploding cell

2014-06-18 Thread Lee Hart via EV
Robert Bruninga via EV wrote: Kaboom goes the cell! What kind of charger was being used? Why didn't it notice that the cell voltage was high, and shut down early? Some commercial chargers are amazingly stupid. I have a cordless drill with nimh batteries. Its charger blindly charges for 2 ho

Re: [EVDL] Gas tax is not working...(tolls and Park-N-ride)

2014-06-25 Thread Lee Hart via EV
"switching to EV's for commuting does nothing to solve congestion..." Rick Woodbury's Tango EV does. See www.commutercars.com The Tango is a 4-wheel car that's only 3 feet wide and 8 feet long. It's the same size as a motorcycle. Four of them can park in the same parking place that holds just

Re: [EVDL] gas tax (EV transmission lines, not oil pipelines)

2014-06-25 Thread Lee Hart via EV
Robert Bruninga via EV wrote: I can see that my original statement was confusing. What I meant was that for the same conductor and same I^2R loss, DC can deliver nearly 40% more power because the DC line can operate at the PEAK voltage rating of the line, whereas the AC line only delivers that

Re: [EVDL] 3d printed auto parts

2014-06-28 Thread Lee Hart via EV
brucedp5 via EV wrote: EVLN: Local Motors Will Build& Deliver The 1st 3D-Printed EV @IMTS 2014 Funny, Urbee claims the same thing. I'm sure there are others. Do *any* of the companies that claim "world's first..." bother to check history before making their claims? http://www.popularmechan

Re: [EVDL] EV potential - Postal Service and 7 MPG average

2014-06-29 Thread Lee Hart via EV
EVDL Administrator via EV wrote: It appears to me that EVs have not yet been a success in postal delivery. I can't understand why not. Anyone with other (I hope more positive) information please post it. I have some information on this regarding the US Postal Service's efforts. The Post Offic

Re: [EVDL] EV potential - Postal Service and 7 MPG average

2014-06-30 Thread Lee Hart via EV
Rick Beebe via EV wrote: On 06/29/2014 03:57 PM, EVDL Administrator via EV wrote: It appears to me that EVs have not yet been a success in postal delivery. I can't understand why not. Anyone with other (I hope more positive) information please post it. David Roden - Akron, Ohio, USA EVDL Admi

Re: [EVDL] Fw: 3d printing auto body

2014-06-30 Thread Lee Hart via EV
jerry freedomev via EV wrote: lithiums... BMS... composites...finally makes long range EVs viable at a reasonable cost. The FreedomEV has the weight, space, and capacity for 450-500 mile range if I wanted to... But probably stick with under 150 miles to save weight, cost... I agree. Just becau

Re: [EVDL] Trailer type Range extenders

2014-07-10 Thread Lee Hart via EV
EVDL Administrator via EV wrote: I don't see the benefit in driving an EV M-F and add an ICE range extender to it on the weekend, if the range extender's emissions are 10x that of the ICEV I'm replacing - or more. IMO it's better to own an EV, and rent a small ICEV for those longer trips; or tak

[EVDL] Controller page updates

2014-07-15 Thread Lee Hart via EV
Hi gang, I've been adding content to the Sunrise EV website in an effort to make it more useful. I just added documentation on the Henney Kilowatt rectactor controller (the earliest solid-state controller that I know of). I'm no web designer, so I stick with simple HTML4 for everything to kee

Re: [EVDL] motor controller

2014-07-17 Thread Lee Hart via EV
Electric Blue auto convertions via EV wrote: Lee, that looks like a Clark/Hyster contactor board fork lifts used in the 60s and 70s. I have a Clark E500 fork lift service manual, It looks the same, The Clark/hyster has field weaking, The Henneys were built in 1959. Only about 100 were made, but

Re: [EVDL] Controller page updates

2014-07-17 Thread Lee Hart via EV
Many thanks to everyone for checking out the page! I'm delighted to see that HTML4 still seems to work. I was worried that the web had evolved past it (the way my ASCII artwork can no longer be displayed on many people's computers). :-( Lawrence Harris wrote: Getting requirements to meet WCAG 2.

Re: [EVDL] EVLN: BMW&Daimler developing 3-Hour Wireless Inductive EVSE for i3 EV

2014-07-19 Thread Lee Hart via EV
Peter C. Thompson via EV wrote: I've just spent an entire week working with the standard responsible for this, so all of this is VERY fresh in my mind. :) Excellent! I'm delighted to see your company thinks it is important. Though, I still worry about "unintended consequences". When I was wo

Re: [EVDL] EVLN: BMW&Daimler developing 3-Hour Wireless Inductive EVSE for i3 EV

2014-07-20 Thread Lee Hart via EV
From: Martin WINLOW > Not wanting to shoot your work down but I am reminded of (I think it was) > Lee's idea of using > an auto engaging charger connection which would be much more efficient, much > cheaper and only > marginally less practical. It was actually Bob Rice's solution (although the i

Re: [EVDL] EVLN: BMW&Daimler developing 3-Hour Wireless Inductive EVSE for i3 EV

2014-07-21 Thread Lee Hart via EV
From: Peri Hartman via EV >Me, too. However, consumers might not care (unfortunately). In other >words, you might pay 15% more to cover losses but compared to what? >Consumers will be happy to just park and have the charge happen >automatically. Unless energy costs are really high, they wil

Re: [EVDL] EVLN: BMW&Daimler developing 3-Hour Wireless Inductive EVSE for i3 EV

2014-07-21 Thread Lee Hart via EV
From: Martin WINLOW > It's not just convenience. There is the issue of theft/vandalism of/to > charging cords > and the (small) danger to passers by posed by them i.e. the trip hazard. > They'll also > wear out in time. The inductive system removes all these problems. Maybe. Everything hinges on

Re: [EVDL] EVLN: BMW&Daimler developing 3-Hour Wireless Inductive EVSE for i3 EV

2014-07-21 Thread Lee Hart via EV
From: Dennis Miles > at what cost? Are we going to replace a $50 wire with a $2,000 wireless? Yes. :-/ As long as "someone else pays" for that $2000 wireless setup and the extra electricity it uses, consumers will fall for it. Of course, it is usually the consumer that pays, whether he realizes

Re: [EVDL] EVLN: BMW&Daimler developing 3-Hour Wireless Inductive EVSE for i3 EV

2014-07-21 Thread Lee Hart via EV
From: Peri Hartman > Is it possible to use multiple coils to focus the "beam"? Magnetic fields are devilishly difficult to direct or focus. With electricity, we have great conductors (copper, silver, etc.) and great insulators (air, plastics, etc.) There are *many* orders of magnitude differenc

Re: [EVDL] EVLN: BMW&Daimler developing 3-Hour Wireless Inductive EVSE for i3 EV

2014-07-23 Thread Lee Hart via EV
From: George Tyler >I have done a lot of transformer and inductor design over the years, always >said "you can't focus or direct a magnetic field", apart from ordinary >magnetic materials of course. On day I found something that someone had put >together on the web: He pointed out that if you have

Re: [EVDL] Tesla might Supercharge EVs to regain 400mi in 15min for 7 credits

2014-07-27 Thread Lee Hart via EV
Ben Goren via EV wrote: brucedp5 wrote: In Tesla’s defense, Straubel says that the current 120-kW Supercharger “seemed pretty crazy even 10 years ago” when conventional chargers delivered under 10kW. So, maybe this theoretical 720 kW Supercharger is possible…in time. But what’s the work-around

Re: [EVDL] Why EVs are awesome

2014-07-28 Thread Lee Hart via EV
Roland via EV wrote: One day I was in the checkout lane at Wal Mart and had the whole shopping cart fill with 1 gallon jugs of distill water that was on sale. A guy said, what do you use all that water for? I said, I run my car on this water. Add it to a secret solution of H2S04 and Ionize

Re: [EVDL] Tesla might Supercharge EVs to regain 400mi in 15min for7 credits

2014-07-29 Thread Lee Hart via EV
Dennis Miles via EV wrote: Because, Marion, the fool cell gives the least pollution at the vehicle. (And the manufacturers want the carbon credits, and Is, I have been told, the refining or conversion, of methane to hydrogen, is done in an unregulated location, not in the motor vehicle.) Exactl

Re: [EVDL] Lawn tractor conversion: lessons learned

2014-07-29 Thread Lee Hart via EV
Michael K Johnson via EV wrote: I got lots of useful help here on my lawn tractor conversion project — Glad we could be of help. Congratulations on getting the "EV grin" while mowing the lawn! :-) silly idea that I could fit everything under the existing hood and it would look the same, jus

Re: [EVDL] Lithium battery setpoints...

2014-07-30 Thread Lee Hart via EV
Sean Korb via EV wrote: Is this (softball question here) because the aluminum terminals start to oxidize in the atmosphere and the sandpaper takes that light (but very tough and durable) corrosion off? This corrosion would add significant resistance to the battery terminals. Right in one! :-)

Re: [EVDL] Lithium battery setpoints...

2014-07-30 Thread Lee Hart via EV
Dennis Miles via EV wrote: Bill, You are right copper oxide is a "Semi-conductor," and it was used in battery chargers 100 years ago, as rectifiers. But whereas I was a bit strong in calling it an insulator, As it passes current in only one direction, I would not call it a very good conductor eit

Re: [EVDL] Lithium battery setpoints...

2014-07-31 Thread Lee Hart via EV
Michael Ross wrote: In air, aluminum oxide forms nearly instantly. Therefore, sanding is a useless activity, if the goal is to remove aluminum oxide... You're right; aluminum oxide forms very quickly. However, the longer it is exposed to air, the thicker the insulating layer gets. So cleaning

Re: [EVDL] To Noalox, or Not to Noalox

2014-07-31 Thread Lee Hart via EV
Michael Ross via EV wrote: I can't for the life of me figure out why a highly resistive dielectric grease (mentioned by others) is a better choice than a conductive grease... The grease is only filling the gaps (asperities) between the two metals. There is no grease at the contact points -- it

Re: [EVDL] Hybrid Mustang: AC or DC?

2014-07-31 Thread Lee Hart via EV
Ben Goren via EV wrote: Thanks, Jerry. A 200+ mile BEV Ghia certainly sounds like a fantastic car... The Ghia happened to have several attractive attributes for an EV. It was very light, it was reasonable aerodynamics, and enough room for batteries. John Bryan's Ghia was one example. He caref

Re: [EVDL] Hybrid Mustang: car bought

2014-08-01 Thread Lee Hart via EV
jerry freedomev via EV wrote: [Is the Mustang with the low VIN number a V8?] it's far better just to keep it original to retain it's future value. When the economy gets better it'll be very desirable. This is a dilemma I run into all the time. Older simpler cars make better EVs and are easier

Re: [EVDL] Hybrid Mustang: AC or DC?

2014-08-01 Thread Lee Hart via EV
Peri Hartman via EV wrote: One more idea, to confuse you even more :) You could drop the tranny and keep the ICE. That tranny is rather long and there may be room in the space to put a large motor and a generator without modifying the tunnel. The generator would charge the battery or directly ru

Re: [EVDL] Hybrid Mustang: AC or DC?

2014-08-02 Thread Lee Hart via EV
Willie2 via EV wrote: Here is a cautionary tale of conversions and air conditioning... Ouch! It sounds like the guys doing your conversion are learning "on the job". :-( Let's see: Are these the takeaways from your experiences? - Be sure there is sufficient belt wrap (looks like 120 degrees

Re: [EVDL] Hybrid Mustang: AC or DC?

2014-08-02 Thread Lee Hart via EV
Ben Goren via EV wrote: I've thought about adding insulation for both thermal efficiency and road noise reduction Insulation helps in both of these respects. Cars are *woefully* badly insulated. Insulation has a major effect on how much energy you'll need to heat or cool it. You can run the

Re: [EVDL] Hybrid Mustang: motorcycle drivetrain?

2014-08-05 Thread Lee Hart via EV
Dennis Miles via EV wrote: David, and others, the most fragile part, of a series DC motor, is the commutator. And that is, because the copper segments are glued to an insulating core. When the current is flowing, the segments heat up and soften the glue, then they are subjecting to "lifting," awa

Re: [EVDL] Hybrid Mustang: motorcycle drivetrain?

2014-08-06 Thread Lee Hart via EV
EVDL Administrator via EV wrote: Ben, autos stopped using chain or belt drives 80 years ago ... Well, lots of cars still have timing chains. They last longer than belts. :-) -- We cannot waste time. We can only waste ourselves. -- George Matthew Adams -- Lee Hart's EV projects are at

Re: [EVDL] EVLN: i3 EV self-parks> driver climbs out of window to prove (video)

2014-08-06 Thread Lee Hart via EV
expecting the car to plug itself into a wall outlet / cable is asking a bit much. I can easily imagine a robot arm that can reach out, find and connect to some contacts mounted somehow on the front license plate area. That's a lot of moving parts to break, especially considering how many peo

Re: [EVDL] Protecting DC PWM Controller from low inductance/resistancemotors

2014-08-11 Thread Lee Hart via EV
Michael K Johnson via EV wrote: Cor, How many turns did you wind? I'm assuming you removed the center portion of the EI in order to get a rectangular shape? Yes, you need to remove the magnetic shunts. These are rectangular blocks of laminations tack-welded into the space between the primary

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-16 Thread Lee Hart via EV
Danpatgal via EV wrote: I have on my to-do list to clean up the connections. With the BMS modules on there it's just a pain and I have to be very careful (I know - if I had done it at the beginning ...). You can measure the resistance of the connections without taking them apart. Then only cl

Re: [EVDL] EVLN: Leno rides Harley-Davidson Livewire EV (video)

2014-08-19 Thread Lee Hart via EV
Maybe the Livewire is just the tip of the spear in a Harley attempt to expand to new markets? Bruce EVangel Parmenter via EV wrote: You may have something there. HD has a history of doing that with varying degrees of success. You have to give them credit for having the nards to do that. After

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-19 Thread Lee Hart via EV
Martin WINLOW via EV wrote: What, as a matter of interest, is an acceptable amount of resistance in a battery or cell terminal connection? MW It depends on the current, how long it has to carry it, and how large and effective the terminals are at radiating the heat produced. But in general

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-19 Thread Lee Hart via EV
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. Martin WINLOW via EV wrote: At EVERY connection? In a 120

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-19 Thread Lee Hart via EV
Peri Hartman via EV wrote: To take this to a traction pack, I would want to try a similar design where strings of cells are spot welded in parallel for the desired current load. As I understand it, you can put as many in parallel as you want and control them with a single BMS unit. Well... Ther

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-19 Thread Lee Hart via EV
Michael Ross via EV wrote: Is it easy to create exactly 10 amps? (not rhetorical) Don't many chargers vary a good bit depending on the load the work into? In which case, you need to have a second instrument for the current measurement, and it needs to be sufficiently accurate and steady. I meas

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-20 Thread Lee Hart via EV
Jay Summet via EV wrote: The eSamba guy is using a piece of "fuse wire" to each cell, so that if a single cell shorts out, the fuse wire blows... That's a good plan. Do you know how he tested it, to be sure the fuse wire is sized right to actually work? -- The principal defect in a storage ba

Re: [EVDL] CALB bolt terminals getting hot -

2014-08-20 Thread Lee Hart via EV
Jay Summet via EV wrote: Why not pressure fit? ...Flashlights do it all the time... Think about how many times you've had bad connections and flickering light, had to shake it or clean the contacts to get it to work. You can make a good electrical connection with pressure alone, but it tak

Re: [EVDL] Conversion advice (regen)

2014-08-22 Thread Lee Hart via EV
Ben Goren via EV wrote: once I started driving it, I realized I hardly ever used the brakes... the amount from regen is not worth it (I am going on the assumption that regen in DC traction motors causes undue arcing of the commutator...) A DC motor needs to be designed with regen in mind. The o

Re: [EVDL] Conversion advice (regen)

2014-08-22 Thread Lee Hart via EV
Jan Steinman via EV wrote: I have a friend who owns a motor service/rewinding shop. He says it would be cost-prohibative to do so, if you had to pay someone to do it. I'm sure that would be the case. If shop time is $100/hour and it took 4 hours, the rewind would cost $400. Nobody will pay that

Re: [EVDL] Conversion advice (regen)

2014-08-22 Thread Lee Hart via EV
From: Lee Hart via EV >When you increase the voltage, you reduce the current proportionately. >I.e. a 12v 100amp alternator becomes a 120v 10amp alternator. Rather >than use the special oddball automotive diode packages, just bring out >the 3 phase wires, and use an external brid

Re: [EVDL] Cargo bike with electric chain.

2014-08-28 Thread Lee Hart via EV
From: Chris Tromley >​Not liking the efficiency hit, but still an interesting idea​. Like any hybrid, you lose efficiency at the peak; but regain it during other modes of operation. If you spend enough time in these other modes, then your overall efficiency improves. I'm no expert, but I suspec

Re: [EVDL] EVLN: As EV battery prices fall> ?More range or lower100mi EV cost?

2014-08-30 Thread Lee Hart via EV
From: Cor van de Water >Like so many other EV'ers, we have found the semi-ideal solution in >having an EV (rather short range, but I can manage over 95% of my trips >fine) in addition to the Prius which is my wife's favorite car. >Everybody happy. Same here. EV for short trips, Prius for long ones

Re: [EVDL] EVLN: As EV battery prices fall> ?More range or lower 100mi EV cost?

2014-08-30 Thread Lee Hart via EV
Ben Goren via EV wrote: Obviously, a car that's superior (and actually used) for 85% of driving should be considered the primary car -- even if such a car generally isn't an option as the only car for a single-car family. That's generally how I've been using my EVs for 30+ years. It's my prima

Re: [EVDL] EVLN: Menacing Copper-Theives> A 'Cut & Steal' EVSE Scourge

2014-08-31 Thread Lee Hart via EV
From: Peter C. Thompson >In any case, as long as surplus copper can bring in some cash, there >will always be cable theft. Then make the wire out of something else. Aluminum, or even steel. I had problems with the neighbor cutting the perimeter wire for my Robomower (which is an EV, so it's on-

Re: [EVDL] EVLN: Menacing Copper-Theives> A 'Cut & Steal' EVSEScourge

2014-09-01 Thread Lee Hart via EV
From: Cor van de Water >Ehhh - the *internal* wiring of an EVSE, how can that be a standards >thing? >Who cares if the charging cable has copper, steel or aluminum wiring, as >long as it meets the current spec (and possibly the max resistance if >that is important (voltage drop)? Cor, perhaps you

Re: [EVDL] EVLN: Menacing Copper-Theives> A 'Cut & Steal' EVSEScourge

2014-09-01 Thread Lee Hart via EV
Lots of great comments on this thread. I think it boils down to thieves steal the wire because it is easy. Nobody's watching, it's easy to cut the present cables, and it's easy to sell the copper for fast money. So the solutions come down to a) better surveillance, b) making it harder to steal

Re: [EVDL] EVLN: Menacing Copper-Theives> A 'Cut & Steal'EVSEScourge

2014-09-06 Thread Lee Hart via EV
tomw via EV wrote: EVSE availability varies greatly with area of the country. That's for sure. Where we live, there's an EVSE at the Nissan dealer in St. Cloud MN (about 10 miles away). Beyond that, the next one is in Brooklyn Park MN, (65 miles away). When we test drove a Nissan Leaf, 2/3 o

Re: [EVDL] Stud type fuse block needed

2014-09-08 Thread Lee Hart via EV
Does this fuse have a flat blade at each end with a hole in it for a bolt? I usually mount this kind of fuse on these: http://www.waytekwire.com/products/1439/Junction-Blocks/ They are basically a plastic block with a stud embedded in it. The block can be attached to a chassis, and the stud is

Re: [EVDL] Stud type fuse block needed

2014-09-08 Thread Lee Hart via EV
Jan Steinman via EV wrote: Yea, I forgot the part where I put the whole thing inside a section of fiberglass cross-country ski pole. That should contain the shrapnel, and I shrink-wrap the fiberglass to the main conductor, which hopefully keeps it from contacting ground. Have you tried testi

Re: [EVDL] Electrifying Large Vehicles> converting buyers to a higher mpge design

2014-09-16 Thread Lee Hart via EV
EVDL Administrator via EV wrote: Now here is where my cynical side rebuts my optimistic side. :-\ I wonder if this wouldn't just end up much like the "flexible fuel" vehicles sold for the last several years... I can see many of these PIHs running most or all of the time on gasoline, just like the

Re: [EVDL] 4 to 12 Cell Lithium BMS

2014-09-16 Thread Lee Hart via EV
Steve Clunn via EV wrote: I am working on some Golf Carts and portable 12V power packs that get used sporadically and may sit for months without use. I have contactor on one 12V and 36V that draws about 1 amp. The problem is, if everything is happy, the Mini BMS Circuit keeps the contactor ON.

Re: [EVDL] 4 to 12 Cell Lithium BMS

2014-09-17 Thread Lee Hart via EV
Cor van de Water via EV wrote: Since this is used for charging - you might be able to cut the wire from the contactor that feeds it from the aux battery and instead, connect the power to the contactor coil from a small 12V supply powered by the charging AC, so it only powers up when actually char

Re: [EVDL] 4 to 12 Cell Lithium BMS

2014-09-17 Thread Lee Hart via EV
Steve Clunn via EV wrote: One of my problems with the setup that I have is that the Contactor is for both driving and Battery Charging, so, the Contactor ends up being ON almost all of the time. One solution of course, would be to have the charging circuit separate from the Load Circuit and I co

Re: [EVDL] Reduced range with Heater on.

2014-09-17 Thread Lee Hart via EV
Robert Bruninga via EV wrote: “What? The heater in your gas guzzler is reducing your gasoline range by over 70%. And not only that, you can’t even turn all that wasted heat off! All you can select to do is either vent the heat into the cabin in the winter, or blow it under the car all the rest

Re: [EVDL] Dissimilar metals on Headyways?

2014-09-19 Thread Lee Hart via EV
via EV wrote: So my basic question is if the cell is already Al to Steel internally, might it be better to go Al to Steel to Al (that last Al being my intercell connectors) than to do Al to Steel to Cu (which would be copper intercell connectors)? What little I know about metallurgy tells me th

Re: [EVDL] Tragedy of the commons (was Electrifying large vehicles...)

2014-09-19 Thread Lee Hart via EV
The tragedy of the commons: http://en.wikipedia.org/wiki/Tragedy_of_the_commons How many ecologically minded small car drivers does there have to be to make up for the excesses of the large ones? There is a field of study called Fuzzy Logic (silly name; serious topic). Normal boolean logic assu

Re: [EVDL] Dissimilar metals on Headyways?

2014-09-21 Thread Lee Hart via EV
via EV wrote: I might well be fighting a losing battle, but for the price of 4 holes in a strip of material it has been a great education. Tonight I tested the different alloys of Al idea. Last time, 0.02 x 1.75 in strip of roof flashing aluminum: ~120 F temperature rise in ~15 seconds, cross

Re: [EVDL] Lithium batteries direct from China

2014-09-22 Thread Lee Hart via EV
It's been a number of years, but I participated in a group buy from Thundersky. Basically, they shipped us floor sweepings; rejects, old stock, and junk. You need to understand that Chinese businesses are not bound by any of the legal protections and ethics of US firms. Many of them take full ad

Re: [EVDL] Power of EV (DC)

2014-09-22 Thread Lee Hart via EV
John Lussmyer via EV wrote: So, now that my Electric F-250 is fully functional with it's Leaf batteries, I've been driving it more. One of the odd things I have to deal with is that my other vehicle is a nearly identical truck that is Diesel. So, on the freeway with the Diesel (which I've been

Re: [EVDL] Dissimilar metals on Headyways?

2014-09-23 Thread Lee Hart via EV
George Tyler via EV wrote: Why not just buy the link plates that headway sell, made for the purpose. Get the cell mounts at the same time? Are these just a flat bar that bolts directly between cells. If so, that's not a good way to do it. The cells will move slightly due to road bumps and vi

Re: [EVDL] Lithium batteries direct from China

2014-09-23 Thread Lee Hart via EV
Marcus Reddish via EV wrote: Are these the old white Thunder sky cells that failed? Seem to remember a picture of them leaking. Is it possible folks charged those early cells like they were lead and caused (or contributed to) the failures? I have not heard of any bad "batch" since the white cells

Re: [EVDL] co-operation

2014-09-26 Thread Lee Hart via EV
Robert Bruninga via EV wrote: It was a rude awakening to me when I realized that all the Greatness of an EV to solve all our problems does not apply to congestion... How about if the EV is Rick Woodbury's Tango (see www.commutercars.com)? This is a car the size of a motorcycle; 1/4th the size

Re: [EVDL] Building a true road going solar EV.

2014-09-27 Thread Lee Hart via EV
>> The other potential problem is *not* having a differential. With a >> mechanical differential, one wheel is allowed to turn faster than >> the other. When going around corners. With hub motors, that process >> will have to be done electronically. With one controller and two DC motors, each dr

Re: [EVDL] Building a true road going solar EV.

2014-09-27 Thread Lee Hart via EV
Ben Goren via EV wrote: http://www.resilience.org/stories/2012-10-25/electric-velomobiles-as-fast-and-comfortable-as-automobiles-but-80-times-more-efficient Thanks, Ben! This is an excellent article on the strengths, weaknesses, and challenges in very light human-electric hybrid vehicles. So

Re: [EVDL] Lithium batteries direct from China

2014-09-30 Thread Lee Hart via EV
Byron James via EV wrote: Yikes - the GBS specs call out max continuous discharge <3C. I would be careful pulling 5C. A Local GBS distributor destroyed, within a month, GBS cells charging and discharging GBS cells at 3C... I tested 16 GMS-LFMP100AH cells. I found two bad ones as delivered (sig

Re: [EVDL] Lithium batteries direct from China

2014-09-30 Thread Lee Hart via EV
Lee Hart via EV wrote: I tested 16 GMS-LFMP100AH cells... Correction; should be GBS-LFMP100AH cells. -- Results! Why man, I have gotten a lot of results. I know several thousand things that won't work. -- Thomas A. Edison -- Lee Hart's EV projects are at http://www.sunrise-ev.com/L

Re: [EVDL] Chinese inverters legality?

2014-10-01 Thread Lee Hart via EV
Bill Dube via EV wrote: I can think of no modern commercial appliances that require that neutral be at ground potential. Pretty much all gas furnaces, water heaters, electric stoves, and other appliances that "prove" flame before they will open the main gas valve. The gas pipe is always grou

Re: [EVDL] EValert: !Don't buy a salvaged Tesla EV to repair &drive! (video)

2014-10-02 Thread Lee Hart via EV
Collin Kidder via EV wrote: If you purchase something (and you do get a title when you buy a car) then it is yours. What you do with it is no longer the company's problem. I agree with Collin. He bought it; it's his to do with as he likes. Tesla can choose to help (by supplying parts, offering

Re: [EVDL] EValert: !Don't buy a salvaged Tesla EV to repair &drive! (video)

2014-10-02 Thread Lee Hart via EV
Robert Bruninga via EV wrote: This is laughable. Sure the car is yours to do anything you want with. But when you want to go ask Tesla to "activate it", then guess what, you are ASKING for help from someone who has a very valid reason not to want to take the risk to HELP you with YOUR salvage

Re: [EVDL] EValert: !Don't buy a salvaged Tesla EV to repair &drive! (video)

2014-10-02 Thread Lee Hart via EV
Russ Sciville via EV wrote: I can understand why Tesla are a bit twitchy about people re-building accident damaged cars as the main cell pack under the floor could be damaged. No, it's not surprising. But *all* car companies have had the same worries since time immemorial. For that matter, an

Re: [EVDL] EValert: !Don't buy a salvaged Tesla EV to repair &drive! (video)

2014-10-05 Thread Lee Hart via EV
via EV wrote: I gave myself an idea. Fill the battery boxes with a fluid. If the fluid is leaking after a wreck, the battery boxes have been compromised, so the car shouldn't be driven. That's not a bad idea. Batteries also need heating and cooling. Fluids are a good way to add or remove hea

Re: [EVDL] EValert: !Don't buy a salvaged Tesla EV to repair &drive! (video)

2014-10-05 Thread Lee Hart via EV
Klaus via EV wrote: It's been going for a long, long time. To mention just a few: [snip]... It's just a game of cat and mouse. A great summary, Klaus. And the cat has all the teeth and claws (money, lawyers and lobbyists). You'll notice that car companies have gotten a lot smarter in dealing

Re: [EVDL] Lightobject meter experience

2014-10-13 Thread Lee Hart via EV
Cruisin via EV wrote: Using a meter to turn off a charger at a pre-programmed voltage can be very risky. Paul Dove wrote: >> Problem is no one has actually proved that with experimentation. >> Not in any of my reading. You can believe what ever you like. >> >> I have used ammeter for 2 years n

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