Re: [EVDL] Miles consumed for altitude

2020-10-14 Thread Bill Dube via EV
    In Colorado, you care about the loss of range when you change altitude because you may not have enough range to; A) get to your destination at the higher elevation, or, B) make the return trip from some location at lower elevation.     For example, if you were to drive you brand new Leaf

Re: [EVDL] Spot weldingu

2020-09-30 Thread Bill Dube via EV
The typical welded pack has two spot welds on each end of the tab. This is the minimum you can get with a resistance welder. I typically put four welds on each end of each tab. I do this in two welding operations well separated in time. This lets the heat dissipate from the first weld. This is

Re: [EVDL] Spot welding questions.

2020-09-29 Thread Bill Dube via EV
The thickness of the tab changes the amperage setting. Thicker equals higher amperage. Start out a very low amperage, and increase it until you get an acceptable weld. Never start out at high amperage. Good way to ruin electrodes and make a mess. (Ask me how I know.) The negative end of the

Re: [EVDL] EVLN: (hd-pr)> LiveWire Sets Record

2020-09-21 Thread Bill Dube via EV
There must be at least ten (10) of the identical vehicles manufactured for it to be able to set a production record in NEDRA. (NEDRA has the least stringent "production" class requirements, by the way. The requirements for production land speed records are far more difficult.) Have there

Re: [EVDL] Chinese electric/plasma jet engine.

2020-08-31 Thread Bill Dube via EV
The NOx pollution would be horrendous. Oxides of nitrogen (NO, NO2, etc.) form when air is heated, like in an engine (or in lightning, for example.) NOx is not particularly stable, so it later breaks down in sunlight in the presence of other pollutants to create ozone (O3). More NOX = more

Re: [EVDL] Soldering vs. spot welding

2020-08-09 Thread Bill Dube via EV
The cell won't last if you solder them. You can' help overheating the terminals. This ruins the separators. They are designed to be spot welded. You really need to use an inverter welder instead of a capacitance welder. Should be 4000 amps peak (at least 3000 amps). Bill D. On 8/10/2020 6:29

Re: [EVDL] Oops. A123 Cells are delicate it seems

2020-07-31 Thread Bill Dube via EV
We have learned the hard lesson that you should never rely on the thin membrane on the case to provide insulation. The cells originally had a cardboard tube around the case instead of a thin layer of heat shrink. Much better for insulation, but considerably bulkier I'm guessing you just had

Re: [EVDL] LiFePO4

2020-07-09 Thread Bill Dube via EV
Administrator via EV wrote: On 9 Jul 2020 at 14:30, Bill Dube via EV wrote: They altered their focus away from EV batteries and towards other markets that made more sense for LiFePO4 technology. Obviously I'm not in any position to advise them, but I wonder if it might be time for A123 to review

Re: [EVDL] LiFePO4

2020-07-08 Thread Bill Dube via EV
that made more sense for LiFePO4 technology. Bill D. On 7/9/2020 2:17 PM, Willie via EV wrote: On 7/8/20 9:09 PM, Bill Dube via EV wrote: A123 Systems has made high quality LiFePO4 for many years. Does A123 survive?  My recollection is that their major car customer (can't come up

Re: [EVDL] LiFePO4

2020-07-08 Thread Bill Dube via EV
ecific power. Bill D. On 7/9/2020 1:11 PM, Alan Arrison via EV wrote: Where are these mythical cells? They sure aren't from CALB. Al On 7/8/2020 8:06 PM, Bill Dube via EV wrote: I don't think that LiFePO4 has made any remarkable gains in specific energy. What LiFePO4 does have is spect

Re: [EVDL] LiFePO4

2020-07-08 Thread Bill Dube via EV
I don't think that LiFePO4 has made any remarkable gains in specific energy. What LiFePO4 does have is spectacular cycle life. If manufactured with some degree of care, you get 15,000+, 100% SOC, 1C cycles @ 25 Celsius from LiFePO4 without going below 50% of the original capacity. They just

Re: [EVDL] Car-size fire-blanket smothers EV li-ion fire reignitions

2020-06-23 Thread Bill Dube via EV
On 6/23/2020 1:30 PM, Lawrence Winiarski wrote: Bill Dube ->  Do you mean the solvent is flammable?  UggThat could be a big problem.   Do you know what is used? Ethylene carbonate is a common li-ion cell electrolyte. Wikipedia explains that there are several organic solvents that are

Re: [EVDL] Car-size fire-blanket smothers EV li-ion fire reignitions

2020-06-22 Thread Bill Dube via EV
don't halt population growth with justice and compassion, it will be done for us by nature, brutally and without pity - and will leave a ravaged world. Nobel Laureate Dr. Henry W. Kendall On Sunday, June 21, 2020, 4:15:34 PM PDT, Bill Dube via EV wrote: This might work, but the fact

Re: [EVDL] Car-size fire-blanket smothers EV li-ion fire reignitions

2020-06-21 Thread Bill Dube via EV
This might work, but the fact is that nearly all EVs have metal-oxide (ie cobalt) li-ion cells than make their own oxygen internally. Basically a fire blanket is useless in an EV fire, and might even exacerbate an EV fire by holding in the heat. What works is water applied liberally and

Re: [EVDL] LRR Tires: Research tips?

2020-06-17 Thread Bill Dube via EV
I was certain that the Audi 4000 springs were a drop in replacement on the Rabbit. I perhaps the springs varied in diameter from year to year, or perhaps according to the country. Sorry that the spring mounts on the Rabbit needed to be changed. :-(  Not such "good" advice, considering the

Re: [EVDL] LRR Tires: Research tips?

2020-06-16 Thread Bill Dube via EV
Give Woody a call. *1-303-936-0232 *Tell them you are an old friend of Bill & Eva and they will get this "sorted" as they say in NZ. :-)     Bill & Eva > Your choices will probably be wider if you splurge for > 15" wheels and fit lower profile tires... David, thanks, I'll look into the

Re: [EVDL] LRR Tires: Research tips?

2020-06-16 Thread Bill Dube via EV
I would steer away (so to speak) from wheel adapters. They are a kluge at best and dangerous at worst. 4x100mm is a _very_ common size. Supposedly, there are 850 different car models with 4x100mm wheels: https://sizemywheels.com/lz-pcd/4-100   and about half of those have a 38mm offset (ET):

Re: [EVDL] 20s A123 battery pack for ebike

2020-06-11 Thread Bill Dube via EV
Sounds like a heck of a deal. Please keep us informed! Bill D. On 6/11/2020 2:42 PM, Lawrence Rhodes via EV wrote: Below is my order and a few bucks for buyer protection. This will be an experiment and learning experience. Lawrence Rhodes Order details Sales order Sold by zhan-lingj ( 383 )

Re: [EVDL] Variac and diode bridge to charge LiFEPO4

2020-06-07 Thread Bill Dube via EV
We have a huge variac with a bridge diode we call "Mongo charge" that we use if we let the magic smoke out of all our on-track chargers. We _never_ leave it unattended. Ever.     If you (or we) decided to leave such a primitive charger unattended, we would probably use a ~25 Amp, optically

[EVDL] Factual article on Fuel cells (was: (offt) h2 won’t overtake EVs> hampered by science & CO2 lies)

2020-06-04 Thread Bill Dube via EV
Factual piece on hydrogen cost and fuel cells cars in Scientific American: https://www.scientificamerican.com/article/lack-of-cheap-clean-hydrogen-slows-fuel-cell-cars/ Bill D. On 6/5/2020 7:39 AM, Peri Hartman via EV wrote: Me, neither. I'm just trying to figure out how they came up with their

Re: [EVDL] Battery pack sizing.

2020-05-11 Thread Bill Dube via EV
I agree. Any cell voltage over 3.8 volts is a waste, and doesn't do the cells any good. The cells don't gain SOC over 3.45 volts. While LiFePO4 cells will _withstand_ 4.2 volts, you really don't want to go above 4.0 volts. Doing this long term or routinely would be detrimental. Bill D. On

Re: [EVDL] Measuring ground fault

2020-05-02 Thread Bill Dube via EV
Divide and conquer. This is the key to troubleshooting. 1) Disconnect whatever portions of the HV traction system that you can disconnect easily. 2) Using a voltmeter, with the range set on a DC voltage slightly higher than the pack voltage, starting with the battery, check the voltage

Re: [EVDL] Communicating over "mains" (Was: Minibms?)

2020-04-29 Thread Bill Dube via EV
The key is that the cell electronics are the simple part. They don't have to be very sensitive or selective at all. They are just listening to a a 100 kW radio station that is transmitting FM on its PWM carrier. It is actually difficult _not_ to listen.     The more sensitive receiver is the

Re: [EVDL] Communicating over "mains" (Was: Minibms?)

2020-04-28 Thread Bill Dube via EV
ent_ in the traction wiring, rather than as a voltage on the input terminals of the inverter (or charger.) Bill D. On 4/29/2020 1:48 PM, Lee Hart via EV wrote: Bill Dube via EV wrote: I have thought about doing this for perhaps 20 years. It may well be possible to communicate via the traction conductors.

[EVDL] Communicating over "mains" (Was: Minibms?)

2020-04-28 Thread Bill Dube via EV
I have thought about doing this for perhaps 20 years. It may well be possible to communicate via the traction conductors. It is probably worth the effort to do so because it would allow you to incorporate the BMS in the cell. Sealing the BMS inside each cell could be very useful, especially

Re: [EVDL] Are these A123 batteries a wise purchase?

2020-04-16 Thread Bill Dube via EV
rce=link_campaign=sig-email_content=webmail> Virus-free. www.avg.com <http://www.avg.com/email-signature?utm_medium=email_source=link_campaign=sig-email_content=webmail> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Thu, Apr 16, 2020 at 6:19 PM Bill Dube via EV wrote: The A123 systems

Re: [EVDL] Are these A123 batteries a wise purchase?

2020-04-16 Thread Bill Dube via EV
The A123 systems 26650 cylindrical cells have a _huge_ cycle life. Way over 5000 cycles at a 1C rate. 100% SOC discharge. (They have cycled a 26650 cell more than 16,000 times and still have greater than 50% capacity.) The main trouble with higher rates is the elevated cell temperature

Re: [EVDL] Are these A123 batteries a wise purchase?

2020-04-16 Thread Bill Dube via EV
The A123 systems 26650 cylindrical cells have a _huge_ cycle life. Way over 5000 cycles at a 1C rate. 100% SOC discharge. (They have cycled a 26650 cell more than 16,000 times and still have greater than 50% capacity.) The main trouble with higher rates is the elevated cell temperature

Re: [EVDL] custom battery

2020-04-13 Thread Bill Dube via EV
On 4/14/2020 4:51 PM, Peri Hartman via EV wrote: Nominally 240. But it really can be anything and I can convert it to what I need. Peri Cells < You can get about one third of the specific energy (~8000 W/kg) from ordinary A123 26650 cordless tool cells.     You can get over

Re: [EVDL] Nissan Leaf-lullaby puts ice on your baby's brain

2020-02-24 Thread Bill Dube via EV
Perhaps the carbon monoxide plays some role in helping children sleep in cars. Bill D. On 2/24/2020 7:04 PM, evln via EV wrote: https://insideevs.com/news/398279/nissan-leaf-sounds-sleep/ Nissan Creates 'Lullaby' To Help Kids Nap In Electric Cars Feb 12, 2020 James Fossdyke [images

[EVDL] "Green Envy" is off to Lake Gairner, South Australia!

2020-02-21 Thread Bill Dube via EV
The Green Envy is the ~1000 HP "version 2.0" of the ~400 HP KillaJoule purpose built electric land speed streamliner motorcycle. Our container packed with the Green Envy and its support equipment left this morning from our shop in Auckland and is headed to the port to travel by sea to

Re: [EVDL] Chrome-moly vs. Steel

2019-12-03 Thread Bill Dube via EV
and Bronze welding. On Tue, 3 Dec 2019 at 19:59, Bill Dube via EV wrote: Chrome-moly steel is about double the specific strength (ratio of ultimate strength divided by density) of mild steel. That's why they often use chrome-moly in airplanes, and never use mild steel. https://en.wikipedi

[EVDL] OT: Re: Chrome-moly vs. Steel

2019-12-03 Thread Bill Dube via EV
Original Message----- From: EV On Behalf Of Bill Dube via EV Sent: Tuesday, December 3, 2019 3:00 PM To: ev@lists.evdl.org Cc: Bill Dube Subject: [EVDL] Chrome-moly vs. Steel (was: Light weight electric motorcycle. DIY) Chrome-moly steel is about double the specific strength (ratio of ultimate s

[EVDL] Chrome-moly vs. Steel (was: Light weight electric motorcycle. DIY)

2019-12-03 Thread Bill Dube via EV
Chrome-moly steel is about double the specific strength (ratio of ultimate strength divided by density) of mild steel. That's why they often use chrome-moly in airplanes, and never use mild steel. https://en.wikipedia.org/wiki/Specific_strength As you can see from the chart, mild steel has a

Re: [EVDL] MIT: Why the electric-car revolution may take a lot longer than expected

2019-11-20 Thread Bill Dube via EV
    The ~50% recycled percentage is steady-state. Same for 80% of raw lead going into battery production. These percentages have not changed substantially for 50 years. (The percentage of raw lead going into battery production has actually grown to more than 85% in recent years.)     In order

Re: [EVDL] koch-koolaid= bs: ... revolution may take a lot longer than expected

2019-11-20 Thread Bill Dube via EV
An important point is that li-Ion batteries need to be recycled one tenth (or perhaps twentieth) as often as lead-acid. Even at the end of their life in a car, unlike lead-acid, they have life left in them for alternative uses. They slowly fade away instead of falling off a cliff. These two

Re: [EVDL] watts per mile ev motorcycle vs prius

2019-11-13 Thread Bill Dube via EV
On 11/13/2019 8:44 PM, Paul Compton via EV wrote: An small motorcycle and rider has roughly the same drag at 60mpg as a small car.     This is the main problem with typical motorcycles. They are basically a brick, aerodynamically. This is compounded by the lack of space and load carrying

[EVDL] Found it! Audi 4000 springs add ~1 inch (was: Any old VW Rabbit conversion parts around?)

2019-10-17 Thread Bill Dube via EV
Found the old post! "Audi 4000 springs will add about an inch of height to a VW Rabbit." "According to wikipedia, the 4000 was a US market model number used in 1980 to 1987 for the car marketed in Europe as the Audi 80. The same car was sold as the VW quantum (US name, Passat in Europe) '82 to

Re: [EVDL] Any old VW Rabbit conversion parts around?

2019-10-17 Thread Bill Dube via EV
As I recall, Audi springs would add an inch of lift and will simply drop into a VW Rabbit. I can't remember the exact model Audi, unfortunately. I have written about this swap it several time on this list, if it is any help finding the model Audi. (I tried to find it, but my archives are

Re: [EVDL] LiFePO4 Thermal Imaging Opinions?

2019-10-01 Thread Bill Dube via EV
I agree with Marco that it is quite likely a dirty/corroded connection between the strap and the cell. This is more common than most folks realize. Remove the strap. Clean both surfaces with Scotchbright. Apply a thin coating of NoAlOx to the terminal and to the bus bar. Reassemble. You

Re: [EVDL] li ion battery in cold weather

2019-09-09 Thread Bill Dube via EV
Ions are not the same as electrons. Ions are what moves _inside_ a battery. Electrons are what moves _outside_ a battery. Electrons travel at near the speed of light. Ions travel at far, far lower speeds, (less than the speed of sound.) Ion must diffuse through the solid or liquid in which

Re: [EVDL] Differential issue

2019-07-05 Thread Bill Dube via EV
, the small pinion would be even more at risk. I just did a quick search and can't find anything lower than 5.89 but I thought there were some industrial versions in the 7s. Brett On Fri, Jul 5, 2019 at 6:12 PM Bill Dube via EV wrote: This car has a very high ratio in the differential. Something

Re: [EVDL] Differential issue

2019-07-05 Thread Bill Dube via EV
This car has a very high ratio in the differential. Something like ~8:1. Most ICE vehicles have ~3:1 or 4:1. The gears may prove difficult to replace. I would start by replacing all the standard, more ordinary parts, like the bearings. Replacing the bearings may add some life to the worn

Re: [EVDL] balancing: ?PD.lu purposely maintenance-drain Tesla-S pack every 20, 000km?

2019-07-02 Thread Bill Dube via EV
I agree that it is not good to satisfy some firmware deficiency by putting a very deep cycle on your pack. Best to correct the firmware, or ignore the problem. On 7/2/2019 7:41 PM, EVDL Administrator via EV wrote: On 1 Jul 2019 at 15:24, paul dove via EV wrote: I think people get confused

Re: [EVDL] EVLN: Transporting/moving your EV> look for a decent company

2019-07-01 Thread Bill Dube via EV
I also had a Leaf transported out of state in the US, and I didn't do any of that. It was simply routine to the transporter. If you are going to ship overseas, it might well be a different story. Also, a _homebuilt_ EV is an entirely different kettle of fish. Bill D. On 7/1/2019 12:18 PM,

[EVDL] EV charging time, Fueling time for Fuel Cells (was: Excellent article)

2019-06-27 Thread Bill Dube via EV
al Message -- From: "Bill Dube via EV" To: ev@lists.evdl.org Cc: "Bill Dube" Sent: 26-Jun-19 6:43:27 PM Subject: [EVDL] Excellent article (was: Lets discourage hydrogen advocates. ) Very well researched article on H2 fuel cells versus EV's. The article expertly covers

[EVDL] Excellent article (was: Lets discourage hydrogen advocates. )

2019-06-27 Thread Bill Dube via EV
Very well researched article on H2 fuel cells versus EV's. The article expertly covers the "what" but doesn't mention the "why" of Toyota and H2. I really would like to know what motivates Toyota to keep pushing H2 passenger cars. Bill D. On 6/27/2019 9:57 AM, Lawrence Rhodes via EV wrote:

Re: [EVDL] Lets discourage hydrogen advocates.

2019-06-26 Thread Bill Dube via EV
Actually, H2 fuel cell vehicles are hybrid cars. They have a battery /and/ a fuel cell. The battery provides a boost for acceleration, and stores energy during regen. The fuel cell can then be smaller to only provide just the average power needs. The battery also allows the fuel cell to ramp

[EVDL] Nifty new website for our latest electric motorcycle

2019-04-30 Thread Bill Dube via EV
Eva just launched the new website for our latest electric motorcycle project, the Green Envy. http://greenenvyracing.com/ It is going to be 1000+ HP and, of course, will be green in color. Shooting for the _overall_ motorcycle land speed record 376 MPH (605 km/h for the metric among us.)

Re: [EVDL] Alibaba/Aliexpress Lithium

2019-03-16 Thread Bill Dube via EV
No Paul, Lee is indeed referring to the rate of discharge chart, however, he has chosen the cut-off to be _*3 volts*_, rather than the customary cut-off of_*2.5 volts*_. (No one uses a cut-off of 3 volts, that I am aware of. All the charts note that 2.5v cut-off is the standard for comparison.

Re: [EVDL] 360 Video of KillaJoule going 236 MPH in Australia

2019-03-15 Thread Bill Dube via EV
, take it's all being done remotely? I suppose at those speeds taking your eyes off the road to even glance at a gauge means a lot of distance covered without seeing it. Are the trail markers at 1 mile increments? Crazy how fast they go by at those speeds. On Thu, Mar 14, 2019 at 5:57 PM Bill Dube

[EVDL] Peukert (was: Alibaba/Aliexpress Lithium

2019-03-14 Thread Bill Dube via EV
Diffusion rates are vastly less in Li-Ion. Thus, Puekert exponents are very near unity (1.0). Yes, there is some tiny effect, but no, the Puekert equation is not really applicable. The one hour capacity is essentially the same as the 20 hour capacity in Li-Ion. Bill D. On 3/15/2019 3:19

[EVDL] 360 Video of KillaJoule going 236 MPH in Australia

2019-03-14 Thread Bill Dube via EV
Here is a 360 video of the KillaJoule on a 236 mph run at Lake Gairdner Australia. https://www.youtube.com/watch?v=gg20-fR3NxE Scroll around with your mouse to see Eva, the controls, look out the side window, etc.     (This video is a lot of fun on a VR head set, BTW.) Bill & Eva

Re: [EVDL] EVLN: L3 DC charging leaves L2 AC face-down in the dust

2018-12-25 Thread Bill Dube via EV
DC chargers are essentially a current source. That is, they are set up to regulate and deliver a specified current, and they let the voltage be whatever it happens to be. The max voltage is 700 volts or more, sometimes as high a 1000 volts. Bill D. On 12/26/2018 11:39 AM, Jan Steinman via

[EVDL] Johnson Controls (was: NMC chemistry working voltage)

2018-12-22 Thread Bill Dube via EV
Johnson Controls is very much a battery manufacturer. They make Optima batteries, for example. Johnson Controls buys up other businesses, including battery manufacturers, like Optima. They are a large, somewhat bumbling, conglomerate.  (They are  kind of like Raytheon, or General Electric.)

[EVDL] Li-Ion versus Lead-Acid (was: Buying a leaf, SOH, GID etc)

2018-12-12 Thread Bill Dube via EV
Li-Ion batteries decline in capacity at a steady slow rate, until they eventually have zero capacity. Pretty much a flat curve. (Actually slightly concave. They decline slightly less per cycle as they age.) Lead-acid batteries "fall off of a cliff" at their end of life. They rise slightly in

Re: [EVDL] AM radios dropped from plugins (RFI, EMI, +)> (go digital)

2018-11-10 Thread Bill Dube via EV
There is no "ground" in a vehicle, only "chassis". (Unless the vehicle is on charge and connected to the grid.) The drivetrain and the AM radio share the chassis "ground", which is likely the root of the problem. The EMI comes from the controller PWM switching, goes into the chassis, (and is

Re: [EVDL] Zilla Code 1124 Main Contactor Stuck On

2018-10-31 Thread Bill Dube via EV
Could also be a stuck precharge relay, or something wrong in the precharge circuit. Bill D. On 11/1/2018 8:23 AM, John Lussmyer via EV wrote: On Wed Oct 31 09:22:19 PDT 2018 ev@lists.evdl.org said: Recently when I start my truck it often takes me a couple of tries of turning the main

Re: [EVDL] EVLN: 400kW (1080mph) EVSE new2 GM> (not new-tech 2others)

2018-09-06 Thread Bill Dube via EV
Indoor sky diving facilities use more than a mega-watt. Shopping centers use far more than this. Half a megawatt is commonplace, believe it or not. They are considering fast chargers this size in New Zealand, but cars have to be set up to use this much charger. There are several car

Re: [EVDL] Shorai LiFePO4 LFX36L3-BS12 Longevity Reviews

2018-08-12 Thread Bill Dube via EV
On 8/13/2018 11:31 AM, Bobby Keeland via EV wrote: Mark Hanson asked "curious if LiFePO4 dies suddenly or gradually like lead."     The cranking power (specific power, internal resistance) stays relatively flat over the lifespan, at least in A123's. The capacity (specific energy) declines

[EVDL] Weatherproof boxes (Was: Juicebox)

2018-06-15 Thread Bill Dube via EV
One of the mistakes folks make it to attempt to make the box completely sealed. You really can't seal a box effectively without going to extreme measures. It gets expensive to do this. Because of changes in temperature and atmospheric pressure, air will find some way to come it and out,

[EVDL] hybrid RV, but using and EV "toad" (was: Winnebago Electric C-class RV r:85/125mi)

2018-05-29 Thread Bill Dube via EV
The article below made me think back to an idea I had many years ago: Why not tow an EV with your RV but use it as a boost going up hill, and regen with it going down hill? RV's very often have a "Toad", or a towed vehicle, that they drag along to use as around-town transportation while the

Re: [EVDL] EV Brakes

2018-05-23 Thread Bill Dube via EV
Just to keep the record straight: Tesla turns on the monitoring only for test drives. Tesla still is the owner and has every right to monitor the cars it still legally owns. Once the car is sold, you have to give express permission to allow monitoring. The default, once the car is sold, is no

[EVDL] Self-discharge (was: Lithium drop in replacements.)

2018-05-14 Thread Bill Dube via EV
Measuring voltage on a LiPOFe4 cell has *_no bearing_* on the state-of-charge. Only at near 100% SOC or near 0% SOC does the voltage change significantly. You have to actually fully cycle a LiFePOFe4 cell to determine its SOC. If you don't do a full, 100% - 0% - 100% cycle, you can't

[EVDL] Article on BMS (was: Lithium drop in replacements.)

2018-05-11 Thread Bill Dube via EV
David, Very nice plain language article on BMS's. Thank you for posting it. Bill D. The battery I mentioned ("Dakota" brand) was advertised as having a true balancing BMS. Discussion of PCBs vs BMSes here: http://ka7oei.blogspot.com/2013/05/lithium-iron-phosphate-lifepo4.html David Roden -

Re: [EVDL] Lithium drop in replacements.

2018-05-11 Thread Bill Dube via EV
Paul, Do you have any evidence of this or is it speculation? (Sorry, I just couldn't help myself.) Bill D On 5/11/2018 12:47 PM, paul dove via EV wrote: Thanks that was interesting. It’s more likely that the Dakota BMS was causing the imbalance with parasitic unbalanced loads, however.

Re: [EVDL] Lead carbon batteries.

2018-05-08 Thread Bill Dube via EV
Lead-carbon has been around for 30 years in various forms. There is a good reason that lead-carbon has not been adopted by OEMs, RC modelers, cordless tool manufacturer, etc. They have high self-discharge issues, typical lead-acid sulfation issues, (even though some claim otherwise) and they

Re: [EVDL] Zivan charger setting with new pack

2018-04-30 Thread Bill Dube via EV
205 from 225 is not a significant change, as far as the charger timer setting goes. Should work just fine.  I'm assuming the pack voltage will be the same, of course.     Just curious, why aren't you moving up to a lithium-ion pack? Not a gigantic difference in price these days. They should

Re: [EVDL] DC-DC oddities continued

2018-04-27 Thread Bill Dube via EV
Could be a bad connection (or cell) in the pack, or pack wiring. Voltage drops feeding the DC-DC and the output cuts back. High load = big currents = big voltage drop on bad connections or weak cell(s) Bill D. On 4/28/2018 12:32 PM, John Lussmyer via EV wrote: On Fri Apr 27 16:22:07 PDT

Re: [EVDL] John Wayland on Netflix?

2018-04-27 Thread Bill Dube via EV
I _always_ do a reduced power warm-up pass, just to make sure everything is race ready, brakes are OK, the steering is OK, etc. TV crews put pressure you to run full power, right off the trailer. Your safety is not their priority, or even any consideration. I am glad no one was hurt. Bill D.  

Re: [EVDL] con-EV: koch-koolaid is getting downright stoopid

2018-04-11 Thread Bill Dube via EV
Charging time is on the same scale as ICE-refueling time, here in New Zealand. About 15 to 30 minutes, for top-off on a Leaf. They (Charge Net) are rolling out a network of fast DC chargers in NZ. Many are at "petrol servos" (gasoline service stations). Some are located as shopping

Re: [EVDL] Clare Bell, JB: interesting links

2018-03-19 Thread Bill Dube via EV
Whatever happened to Clair Bell? She dropped off the grid around the EVS-16 or so. Bill D. On 3/20/2018 3:54 PM, brucedp5 via EV wrote: Way-way before JB was, Clare Bell http://electric-vehicle-discussion-list.413529.n4.nabble.com/Raptor-600-DC-Motor-Controller-on-Ebay-tp429551p429586.html

Re: [EVDL] Genset range extender

2018-03-06 Thread Bill Dube via EV
You really don't care about frequency. All you care about is staying below the maximum allowed battery voltage (or staying below whatever the signal on the BMS says is "to high".) Thus, the generator speed (and the engine speed) can be whatever you wish it to be. Of course, you have to stay

Re: [EVDL] suspicious of a bad calb cell?

2018-02-07 Thread Bill Dube via EV
/categories/building_materials/bm/menus/cs/metalprepsupplies.html https://en.wikipedia.org/wiki/Chromate_conversion_coating Bill D. On 2/6/2018 11:44 AM, Lee Hart via EV wrote: Bill Dube via EV wrote: Did you lightly sand (or Scotchbite) each terminal and apply a thin coating of NoAlOx before connecting

Re: [EVDL] suspicious of a bad calb cell?

2018-02-05 Thread Bill Dube via EV
Did you lightly sand (or Scotchbite) each terminal and apply a thin coating of NoAlOx before connecting? No? Then you have to redo all the connections. They will give you no end of grief. (Ask me how I know. :-) ) If you don't do this connection treatment, the dissimilar metals will corrode,

Re: [EVDL] Question: EV with a 110v outlet with 2KW power rating?

2018-02-01 Thread Bill Dube via EV
You can only _continuously_ draw 80% of the maximum amperage out of any household circuit. (The wiring over heats.) Since a large fraction of 115 volt outlets have a 15 amp breaker, (some have a 20 amp) you can only draw 15 x 115 x 0.8 = 1380 watts. On a 20 amp, 20 x 115 x 0.8 = 1840 watts.

Re: [EVDL] Two EV's to Give Away

2018-01-28 Thread Bill Dube via EV
One month too late for a charitable tax deduction. No $500 for the donation of a car. :-( Ask your tax professional, but I believe the law has just changed. Sorry.  Bill D. On 1/28/2018 2:27 PM, John Blair via EV wrote: We are a four EV family now and that is two too many. We had arranged to

[EVDL] Lead battery recycling, Not 98% (was: Delivery truck)

2018-01-23 Thread Bill Dube via EV
Lee, I think this 98% recycled is a case of very carefully drawing the envelope. I believe it only accounts for batteries that make it though the front gate of the recycling facility. Here is why: According to the International Lead Association's figures, lead-acid batteries use 85% of all

Re: [EVDL] Another recommendation for a drive way protection circuit....

2018-01-09 Thread Bill Dube via EV
I have never understood why the NEC _requires_ an EV charging plug be "locking". It makes no sense. If you drive away (or the vehicle somehow rolls, is towed, or moves away) the plug should simply come out. As it is now, the locking plug won't give, so the cord breaks, or worse, the charger

Re: [EVDL] Good News: EVs Are Not Crashing the Grid

2018-01-01 Thread Bill Dube via EV
I agree with Tom. As EV are slowly adopted, the grid will find ways to adapt. Always will and always has. My state electric utility has asked customers to volunteer (with a nice cash incentive) to put "black boxes" on their air conditioning loads and electric water heaters. The boxes turn off

Re: [EVDL] Solar trailer (a 1000-to-1 waste)

2017-12-29 Thread Bill Dube via EV
I agree 100%. Folks forget that it takes significant energy to tow even a small trailer. Much more than one would think. Probably more energy than the panels produce, especially at highway speeds. Best to leave them on the roof of your house, or put them on a "solar shed" for your car to

Re: [EVDL] Combating ICED EV parking spaces

2017-12-14 Thread Bill Dube via EV
I tend to agree with Paul. The installation of 120vac outlets are a tiny fraction of the price of the installation of L2 charging pedestals. If you spread them around over many parking places, (like they do in the great white north for block heater outlets) there will be less competition and

Re: [EVDL] Combating ICED EV parking spaces

2017-12-13 Thread Bill Dube via EV
Maybe someone will come up with a realistic, elaborately folded, paper origami "Denver boot" as a humorous reminder not to park where you are not supposed to. An origami Denver boot might get their attention, or might not, but it certainly wouldn't make someone too angry, at least someone

Re: [EVDL] EVLN: Coolant immersed cells for XING EV's Modular Battery cooling

2017-12-13 Thread Bill Dube via EV
Looking at the data sheet, Novec 7100 or HCFC-225  would be a better choice than 7200. https://multimedia.3m.com/mws/media/199819O/3mtm-novectm-7200-engineered-fluid.pdf Novec 7200 is flammable, while 7100 or HCFC-225  isn't. HCFC-225 has a boiling point a few degrees below the cell electrolyte

Re: [EVDL] Heat pump vs resistive Heater (never buy another AC unit)

2017-11-29 Thread Bill Dube via EV
The "mini split" type heat pumps and AC units that I have installed in my house have a single outside unit and multiple (2) inside units. The inside units have a finned coil and a fan. The outside units have a finned coil, fan, compressor, and the control electronics. (They have variable

Re: [EVDL] Heat pump vs resistive Heater (OT, but somewhat EV related)

2017-11-28 Thread Bill Dube via EV
. :-) Bill D. On 11/28/2017 9:11 PM, Alan Arrison via EV wrote: Heat can't magically be obtained from cold air. As the temperature drops, the pump must do a lot more work for an ever smaller amount of heat. Al On 11/28/2017 11:03 PM, Bill Dube via EV wrote: Thanks for the Wikipedia reference

Re: [EVDL] Heat pump vs resistive Heater (OT, but somewhat EV related)

2017-11-28 Thread Bill Dube via EV
You can look up "How to install a mini split" on YouTube. The units typically come with poorly translated,  but still very useful, DIY installation instructions. It is best if you have a gauge set and a vacuum pump, but if you are careful and detail oriented, you can use the "purge and bleed

Re: [EVDL] Heat pump vs resistive Heater (OT, but somewhat EV related)

2017-11-28 Thread Bill Dube via EV
hen to release heat where the refrigerant condenses, in the condenser. The refrigerant flows through insulated pipes between the evaporator and the condenser, allowing for efficient thermal energy transfer at relatively long distances.[5] " On Tuesday, November 28, 2017 8:42 PM, Bill D

Re: [EVDL] Heater

2017-11-28 Thread Bill Dube via EV
If you what to get quite fancy, modern OEMs use a heat pump run with a small variable frequency drive. About 4x the efficiency of a resistive heater. No joke, and that is a serious increase in range in the winter. No doubt, you can get a Leaf compressor cheap in the bone yard. By adding the

Re: [EVDL] EVLN: Liaoning Ruixiang RX1E 2seat e-aircraft w/ improved 2hr flight time

2017-11-19 Thread Bill Dube via EV
This is very impressive. Electric airplanes are the next logical step Bill D. On 11/19/2017 12:40 PM, brucedp5 via EV wrote: http://www.chinadaily.com.cn/business/2017-11/02/content_34016129.htm China's 1st electric plane makes maiden flight Nov 2, 2017 - ... its maiden flight on

Re: [EVDL] Slow due to 96V pack?

2017-09-14 Thread Bill Dube via EV
On 9/9 I wrote: >>> I seem to recall that the minimum input voltage for a Zilla is 72 volts. Might be sagging the pack to 72 volts and that is that is simply amps it puts out at that voltage. >>> Seems pretty straightforward. You just have to read the posts in the thread. All PWM

Re: [EVDL] Slow due to 96V pack?

2017-09-09 Thread Bill Dube via EV
I seem to recall that the minimum input voltage for a Zilla is 72 volts. Might be sagging the pack to 72 volts and that is that is simply amps it puts out at that voltage. On 9/9/2017 8:14 PM, John Lussmyer via EV wrote: On Fri Sep 08 21:57:43 PDT 2017 ev@lists.evdl.org said: There is both a

Re: [EVDL] Slow due to 96V pack?

2017-09-08 Thread Bill Dube via EV
There is both a battery low voltage limit and a motor high voltage limit. There is also a motor current limit and a battery current limit. You need to set all four to the appropriate values. You never said if you were reading battery current or motor current. Makes a bit of difference. Also,

[EVDL] Eva and the KillaJoule post the top speed

2017-09-01 Thread Bill Dube via EV
Hi EVDL listers,    Eva and the rest of our hard working land speed team posted the top mph (244 mph) for the BMST event  at Bonneville yesterday.     _Wicked_ heat (0ver 100 F) on the salt took its toll on the vehicle and on the team.     Read all about it on:

[EVDL] Self discharge never sleeps (was: Curtis 1238-6501...)

2017-08-09 Thread Bill Dube via EV
Self discharge has an _extremely_ strong function of temperature. http://batteryuniversity.com/learn/article/elevating_self_discharge It is also a function of cell health, age, past abuse, etc. The list of factors that alter the rate of self-discharge is seeming endless. Because it is such a

[EVDL] Voltage SOC on LFP (was Curtis 1238-6501 State of Charge)

2017-08-08 Thread Bill Dube via EV
It is difficult or perhaps even impossible to determine the SOC on LFP from voltage measurements alone. At least to do it with any accuracy. You can measure the temperature on each cell in addition to voltage to _perhaps_ get a better handle on the SOC, but still you can't get a very accurate

Re: [EVDL] Curtis 1238-6501 State of Charge

2017-08-08 Thread Bill Dube via EV
In LFP, temperature influences voltage more than SOC in the region of 20% to 80% SOC. The voltage changes just a tiny amount between 20% and 80% SOC. Basically, if the voltage changes it is more likely to be due to a change in temperature, than a change in SOC. Indeed, you could measure the

Re: [EVDL] Curtis 1238-6501 State of Charge

2017-08-07 Thread Bill Dube via EV
Looking at the instructions for the QNBBM battery balancers, they appear to be able to balance the battery pack and handle a continuous current of 6 amps. It that correct? Do I have the right model? If I have the correct model, and they can take 6 amps, then you should be able to set your

[EVDL] Private note Re: Curtis 1238-6501 State of Charge

2017-08-07 Thread Bill Dube via EV
tthew Quitter via EV" <ev@lists.evdl.org> wrote: Thanks guys... but if the charger is turning off at a fixed voltage how do I get more power into the pack? On 7 Aug 2017, at 05:02, Bill Dube via EV <ev@lists.evdl.org> wrote: I agree. Voltage on LFP cells is useless for determi

Re: [EVDL] Curtis 1238-6501 State of Charge

2017-08-06 Thread Bill Dube via EV
I agree. Voltage on LFP cells is useless for determining the SOC. The voltage is very constant except at near 100% SOC and at 0% SOC. You really need information about the middle, and voltage doesn't give any clue about that. You need to count the amp-hours, like with an E-meter or a

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