Re: [EVDL] Shorted FB1-4001A DC motor?

I'm pretty sure terminal resistance is supposed to be 0.03 ohms so a normal ohmmeter won't tell you much... How about spin the motor in neutral with a (fused) 12V battery? Any signs of arcing on the commutator? -Ben On Dec 27, 2016, at 1:13 PM, Jay Summet via EV wrote: >

Re: [EVDL] $52M/yr 'Quiet (Electrified) cars' alert-sound rules by 2019/09

Amen, Lee. If quiet cars are truly the problem, the requirement should be universal. Singling out EV's certainly has the appearance - even if not the intent - of hostility and intentionally limiting their appeal. I tend to believe the current action is merely a case of narrow-mindedness, but

Re: [EVDL] Where 20 amp receptacles are required

On Jan 20, 2016, at 11:13 AM, Bill Dube via EV wrote: > If you are planning on plugging in an EV daily into a 120 volt outlet, you > would likely want to eventually change it out for a "hospital grade" type > receptacle. These are really designed to take constant, daily,

Re: [EVDL] EVLN: This Is The GM-200mi EV Before You Are Supposed To See It (v)

Indeed - the Bolt display appears to me to indicate how the energy has been spent in an almost pie chart (pink, purple, green). The pink icon (arrow) suggests driving energy, the purple icon (snowflake) suggests climate control and the green (battery) I guess might be 12V. If my reading is

Re: [EVDL] Charging Profile: Charge to 80% capacity (quickly)

Hi Jay, I think your approach is good. Some chargers (Elcon, at least) let your BMS throttle charge current with an external voltage signal. If your charger supports this, you could try wiring up a comparator and a flip-flop to latch the signal at 0A when you hit your target voltage at 30A.

Re: [EVDL] [SPAM?] Ten states impose flat EV fees, Georgia is highest

I agree we should incentivize low-pollution vehicles, but this is is actually a punitive road use fee. Georgia's gas tax is $.075/gallon. If you drive 16k miles/year (US average) at 22MPG (rough average accounting for older cars), you're paying about $55 toward road maintenance. The $300 EV

Re: [EVDL] article: World’s first 1 megawatt all-electric race car to compete at Pikes Peak

Really? I was pretty sure the title of first megawatt all-electric race car went to the Maniac Mazda over a decade ago... -Ben On Apr 1, 2015, at 9:50 PM, Ben Goren via EV ev@lists.evdl.org wrote: Seems reasonably legit. Nothing about it seems unreasonable.

Re: [EVDL] Cold Charging Lithium Experiences

Lots of great info on this thread! I was actually revisiting the literature on this recently myself. Although my 914 is garaged for the winter, it happens to be at home this year (with its transmission in pieces), and I wanted to top off the battery in case we lost power in all the crazy

Re: [EVDL] Scrapping an EV

A lot of charities and even public radio stations accept old cars as donations. Shop around to see if your car might be of value to one of them. -Ben On Jan 13, 2015, at 8:04 PM, Bill Dennis via EV ev@lists.evdl.org wrote: I didn't have any takers on my Starter EV, Just Add Batteries offer.

Re: [EVDL] 9-Inch ADC Motor Max Voltage

I run a 9 ADC from a 53-cell LiFePO4 pack (170V nominal); I've only put about 5000 miles on the car, but no issues so far. That said, I've had issues with rotor balance, so I tend to operate at lower RPM's, which means I'm limiting the DC voltage across the motor. -Ben On Jan 9, 2015, at

Re: [EVDL] Tesla EV downs utility pole in Paramus, NJ jamming evening traffic

Hi Bruce, First, let me say that I enjoy your newswires and appreciate all the effort you put into the EV community. ...but I really don't think some idiot crashing a Tesla is list-worthy news. -Ben On Dec 3, 2014, at 4:37 AM, brucedp5 via EV ev@lists.evdl.org wrote:

Re: [EVDL] EVLN: Leaf owners – beware the gas station car wash!

I steer clear anyway. They can scratch the heck out of your finish. And windows. -Ben On Oct 13, 2014, at 3:43 AM, brucedp5 via EV ev@lists.evdl.org wrote: http://scholarsandrogues.com/2014/10/06/leaf-owners-beware-the-gas-station-car-wash-renewable-journal-for-1062014/ Leaf owners –

Re: [EVDL] 'We're developing a prototype battery powered train'...

I would think overhead catenary lines would actually be cheaper, and one could do that study without building a prototype... On Aug 15, 2014, at 3:06 AM, Martin WINLOW via EV ev@lists.evdl.org wrote:

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

For your hybrid application, I'd go with the AC. One word: regen -- without it to recharge the battery, hybrid mode is of little benefit; better to just disengage the motor altogether. I get decent performance out of my Porsche 914 with a single 9 DC motor in 3rd gear (although it tops out

Re: [EVDL] Hybrid Mustang: batteries

Too bad A123 went under. Their cells would have been PERFECT. You could consider the EnerDel high-power modules carried by evolve electrics (and possibly others, but I haven't seen them elsewhere). They're more expensive than CALB/Thundersky but better suited to your application. 32Ah/44V

Re: [EVDL] Question about amp-hr

People talk in amp-hours because it's easy and/or they're being sloppy. Batteries are sold in standardized packages (1 cell @ 3.6V for lithium, 3 or 6 cells at 6V or 12V for lead) at which amp-hours is the metric used to differentiate different capacities. But when you build a big series

Re: [EVDL] What serious EVs are available, at what price how do they compare?

I know it's not a 'true' EV, but definitely don't forget the noble Chevy Volt. At just $34k before tax credit, it provides decent EV range (unlike the other PIH), decent performance, a coddled battery that will last forever, actual back seat and trunk space (unlike the puny Leaf), and

Re: [EVDL] EVLN: Their CEO sez Don't buy the Fiat 500e EV

, May 24, 2014 at 11:41 AM, Ben Apollonio via EV ev@lists.evdl.org wrote: On May 23, 2014, at 9:06 PM, Michael Ross michael.e.r...@gmail.com wrote: No, there is no economy of scale with the low numbers they are building. That is a fact. Not on the electric drivetrain

Re: [EVDL] EVLN: Their CEO sez Don't buy the Fiat 500e EV

How exactly is it that Fiat can't produce a teensy car with a tiny battery for less than $46k when small (i.e. lacking economies of scale) upstart Tesla is able to rake in 25% gross margins on a massive, high-performance luxury car with 3x the battery that starts at 70k (which puts the

Re: [EVDL] Miles Remaining

You say that like it's past tense! I still have this on my electric Porsche 914, though only for lack of funds/time... -Ben On May 13, 2014, at 7:08 PM, Jan Steinman via EV ev@lists.evdl.org wrote: From: Michael Ross via EV ev@lists.evdl.org It had another training system - where you

Re: [EVDL] Miles Remaining

You, sir, have just described the battery gauge Tesla uses (though the display is a tad fancier). Except they added tick marks every 10% for extra convenience. I find the 'ignorant masses' are capable of learning. They may not (and very likely won't) fully understand what a kilowatt-hour is,

Re: [EVDL] Peukert # with Lithium Batteries

With all due respect to Lee and his expertise in so many areas, I believe this is incorrect. Lithium Ion has a nearly unity coulometric charge/discharge efficiency. Although high discharge rates depress the voltage more, and therefore cause your battery to reach empty sooner, you haven't

Re: [EVDL] Converter Direction of flow

Maybe probably NOT. A synchronous non-isolated DC-DC buck converter will act as a boost in reverse if voltage is applied to its output (unless the designer has taken adequate protections against it), but the reverse 'output' is unregulated; it gets limited only by the weakest component when it

Re: [EVDL] New throttle for Raptor?

I still have an inductive unit kicking around after my T-Rex died a year and a half ago. Contact me off-list if you're interested. -Ben On Mar 28, 2014, at 4:48 AM, J Bills jbillsn...@flickfx.com wrote: Hi - I was able to score an old DCP Raptor 600 and want to replace my Curtis squealer.

Re: [EVDL] LFP batts, does full voltage mean, full capity

Define aren't showing full capacity. Are you seeing a low voltage (it naturally drops after charge)? Or variations in measured total capacity? Or something else altogether? -Ben On Mar 13, 2014, at 1:33 AM, Peakfoto Digital Photo Still n Video k...@peakfoto.com wrote: I had my cell

Re: [EVDL] EVLN: Spark EV @a fraction of the price of a Tesla-S, review

I doubt yank and crush will happen again. Tesla is too much of a threat for anyone not to want to keep their EV program active, even if it's only a contingency plan. My bigger fear would be Toyota sucking market share and investment away from EV's when they start shipments of their Fool Cell

Re: [EVDL] Lithium for the Price of Lead - Sort of

Aww man! If I had any use for an EV battery at the moment, I'd be all over that. But my 17kWh of ThunderSkys (at 2x the price) are holding up quite well... -Ben On Mar 4, 2014, at 5:11 PM, Danpatgal danpat...@yahoo.com wrote: All saw that EVTV is selling the old Better Place packs, shipped

Re: [EVDL] BMW i3

As far as I know, Tesla actually pioneered that approach to regen, but I've seen many reviews of the i3 where people think it's a novel idea. At first I didn't like the feel, but after further thought, it's far superior than the Prius model (light regen to simulate engine drag, plus additional

Re: [EVDL] EVLN: 2014 Leaf EV, 84-Mile Range, RearView Monitor Standard

Wow, that's a dumb requirement by the EPA! I don't think I would buy a production EV that didn't let me select a max charge less than 100%. I have far too much experience with the effect on battery life, and I buy my cars to last, not for a 3-year lease/upgrade cycle. -Ben On Jan 14, 2014,

Re: [EVDL] boxter ev thoughts

Ditto. My 914 can go 60mi on 80% of my 17kWh pack. Gorgeous car, though. If the batteries are actually healthy, it's a good find. You definitely couldn't build an equivalent conversion for that price, even if you had the donor already. -Ben On Nov 25, 2013, at 9:09 AM, Martin WINLOW wrote:

Re: [EVDL] Li-ion life (WAS: Range)

Indeed! I believe low charging voltages are, at least in part, responsible for LiFePO4's amazing calendar/cycle life. Also, I am told Tesla's Model S gives owners the option to charge conservatively, for life at the expense of range, or aggressively for a long trip. Another part of Tesla's

Re: [EVDL] For OO cable hook ups- need crimping tool

Bob Batson up at EV America in Wolfeboro, NH has one you can rent. I think it's like $30/week...or month...or something. They ship it to you. That's what I did. Nice hex crimper. They even included a cable cutter. Cheers! -Ben On Oct 7, 2013, at 5:49 PM, L. Chris Hager wrote: I'm

Re: [EVDL] Puekert Effect

Agreed. I never take my 54 100Ah (Thunder Sky) cells past 80% DoD, but that's enough for 60 miles range when driving somewhat conservatively in my little Porsche 914, and I haven't had any issues. I do notice voltage sag starting to increase, but not enough to be of concern. I turned off

[EVDL] 914 Driving Observations

Well, it's spring again in New England, which means I have the 914 back on the road, freshly upgraded with a Z1K, an Elcon DC/DC, and several tweaks. I've started experimenting with different driving techniques and made a few surprising discoveries. The first is that my car actually seems to

Re: [EVDL] EV Grin and a fun little mystery

From one Massachusetts EV-er to another, congrats! My own was 9 years in the making. Also, with a Z2K, I think you may have grabbed the title of peppiest EV in the state -- unless someone here bought a Tesla, of course :) Seriously, how come everyone out here in the northeast builds

[EVDL] LiFePO4 over-discharge threshold

Does anyone know the 'do not go below' voltage at which the anode starts to break down in LiFePO4? I know it's somewhere at or below 2.0V but that's about all. My car is parked for the winter. The other day, I went to fire it up check on the batteries and my BMS refused to unlock it. Some