Re: [EVDL] Lithium EV battery in colder weather

I believe those cells are LiFePO they are are also at risk from being stored, fully charged, at temps above 95°F. or charged at temps above 95°F. I too have ruined LiFePO cells this way. The paper I read was talking about below freezing of water temps as problematic, but some cells can take below

Re: [EVDL] Automaker pitches (Call for nationwide U.S. EV Mandate) woo

> Sent from my Fuel Cell powered iPhone > > > On Oct 27, 2018, at 7:22 AM, Michael Ross via EV > wrote: > > > > In the grand schema Tesla is just a tiny contributor to the global > > population of autos. Every thing the established manufacturers do to lag >

Re: [EVDL] Automaker pitches (Call for nationwide U.S. EV Mandate) woo

In the grand schema Tesla is just a tiny contributor to the global population of autos. Every thing the established manufacturers do to lag them will benefit them. I think it is all good for Tesla if they have less pressure. Don't forget that Tesla is more or less the preeminent battery

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

Fast switching power doesn't need a ground or a common return to generate loud EMI and foul AM. In my old testing lab I had used an old transistor radio to locate noise that was fouling a turbine flowmeter output. The problem lies with rapid rising and falling voltage - something that is desired

Re: [EVDL] ?Is this an EV or Watt?: ?Is it a Volt, Bolt, Prius?> crashed in Canby-OR

Many of you have probably seen this, but it is pertinent: Power line inspection There is also an interplay between injury or death and voltage and current Lot's of unsubstantiated/spouse tales house like current is and other grid secondaries are more

Re: [EVDL] 18650 cell level fuse wire

You have two options, make the wire you have thinner, or select an alloy the melts at a lower temperature. Actually there is a possible third option - put some insulating material around it fo keep convective cooling from slowing down the blow. You would want a clear material or you would not be

Re: [EVDL] 18650 cell level fuse wire

The open air fuses of Tesla packs eliminate the sort of creepage failure that Justin has recounted.where aerosol deposits from the vaporizing of the fuse leave traces for further arcing and leakage. On Mon, Jan 21, 2019 at 10:05 PM Justin Kenny via EV wrote: > I'm the owner of the Leaf Rex

Re: [EVDL] EVLN: Tesla e-pump patent enhances drive units

There is a second article on the Teslarati webpage talking about the Chinese Gigafactory 3 that is being fast tracked. Very interesting. On Fri, Jan 18, 2019 at 3:50 AM brucedp5 via EV wrote: > > > >

Re: [EVDL] Efficiency Compared: Battery-Electric 73%, Hydrogen 22%, ICE 13%

On the grid for saving renewable sourced energy, hydrogen might make sense even with the low efficiency. Because there is a real potential for cheap large scale storage. But to release the energy in a mobile application with by combustion or by fuel cell is probably not a great idea. On a utility

Re: [EVDL] NMC chemistry working voltage

Also the warnings are for lead acid not Li ion. On Sat, Dec 22, 2018 at 3:36 PM Michael Ross wrote: > That eBay pack - there in the title it says 90vdc, then in the spec it > says 45vdc. That would worry me is that the seller may not be up to speed. > Also, the provenance is very important.

Re: [EVDL] NMC chemistry working voltage

That eBay pack - there in the title it says 90vdc, then in the spec it says 45vdc. That would worry me is that the seller may not be up to speed. Also, the provenance is very important. Charge level and temperature history are of paramount importance. I think the price is nice - if they are

Re: [EVDL] EVLN: Musk walked-back on PV roof option> too heavy a car.

Lawrence, I don't think you need to tar Musk like that. He is simply practical - thinking that cars that appeal to the vast majority of drivers and passengers will be loaded with services and comfort, they will be very well appointed, compared to things like a Stella, will thus be heavy, will be

Re: [EVDL] EVLN: Musk walked-back on PV roof option> too hea

Well, I see it is a solar racing car with room for a family. It is not a racing car. It is large, it is expensive at least as a prototype ("costs like a house" the DUtch guy saya.) It goes 500 mile on a charge - on a sunny day. You can get regullar cummting out of it in Holland where it is

Re: [EVDL] EVLN: Gigafactory's inside look> cranks-out 2packs/min /24hr (v)

A short little uneducated look inside the Gigafactory by CNBC, but worth a peek. They were given a current cost for Gigfactory cells of $116/KWH, and estimating $100/KWH. That is awesome. I see now why we are starting to see electric aircraft. I heard Musk say they could do transcontinental

Re: [EVDL] EVLN: aevrobotics.com lsEV.au 4auton rideshare, deliveries, waste& medical services

Pretty neat. I like it. A new urban paradigm. Top speed of 40kph solves a number of problems, but causes limitations with distance. I wonder if it is just a lack of open thinking that it can't be useful outside of dense urbanity. I wonder how much it costs. On Wed, Jan 9, 2019 at 7:25 AM

Re: [EVDL] Large Format Cells vs. Small Format Cells for EVs

they are manufactured well, what real quality looks like, what the real life in an application might be. Anyway, funding a lab and having it actually pay salaries looked near impossible. Mike On Thu, Sep 13, 2018 at 12:41 AM Lee Hart via EV wrote: > Michael Ross via EV wrote: > > Yeah, I wouldn't

Re: [EVDL] Large Format Cells vs. Small Format Cells for EVs

many samples for months like that, also tested spade > terminals used in the products. > > > -Original Message- > From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Lee Hart via EV > Sent: 13 September, 2018 4:46 PM > To: Electric Vehicle Discussion List > Cc

Re: [EVDL] EV familiarity

The issue of wire size is ALWAYS dependent on what sort of current MAY occur even in a fault condition. The wire must be increased in cross section if there are heat retaining conditions such as conduit, insulation, limited possibility of convective cooling. So you don't size the wire based on an

Re: [EVDL] Alibaba/Aliexpress Lithium

Dan Baker, There is nothing wrong with taking a Li ion cell down to 0%SOC (which is not a great idea with PbSO4). The problem is when you have a multitude of them there is some variation between them. Over time, they get misaligned in terms of capacity. There are cell balancing routines to help

Re: [EVDL] Alibaba/Aliexpress Lithium

Steve, the ratings are per cell. WHat else is there to do? No management is needed as with a pack. Measuring the capacity of a cell is pretty straightforward. It is up to the user to determine the needed capacity of a pack and how to take care of it. On Sat, Mar 16, 2019 at 6:31 PM Steve Heath

Re: [EVDL] Alibaba/Aliexpress Lithium

Discharging to 0%SOC is not a realistic condition for Li ion cells in a large pack, and I am not aware that PbSO4 are taken below 50% fro greatest life (though I don;t know the why and wherefores of this). With Li ion you get more usable capacity - down to 15% or 20%SOC. Not going to 0% is about

Re: [EVDL] Alibaba/Aliexpress Lithium packs

My experience (limited and dated to be sure) is you get what you pay for. In particular, a cheaper pack with a no name source, the cells may not be well matched in capacity and the BMS may be total crap. I tried to carry on conversations with a couple suppliers at this tier and found that they

Re: [EVDL] Alibaba/Aliexpress Lithium

If you want to see whether a cell will last a long time you have to test it in damaging conditions - full charge and high temps. Cycling does nothing useful beyond allowing the cell to spend more time a conditions that are not damaging at all. That's not really useful, but is is what you will get

Re: [EVDL] EVLN: Mining tycoon pulling a JBstrubel to tap the global EV race

Obviously, if a supplier is unable to perform and meet spec . . . But what is your basis for concern? Tesla is the premier EV maker in terms of cell manufacturing, they ought to be able to handle a new supplier if anyone can. Is there something wrong with Ganfeng Lithium'?

Re: [EVDL] EVLN: Tesla acquires Maxwell dry-electrode tech

It is worth remembering that Musk did graduate work on ultra-capacitors and has always believed they are worth more development. Musk has spent a lot of time with ultra-capacitors and is well educated and experienced to evaluate them.

Re: [EVDL] (use del key, block brucedp email address, 4unwanted posts)

Wasted bandwidth with respect to text based lists is a severely outdated concern. The amount of bits consumed by this list, for a decade, times all the users of this list is exactly... insignificant. Heck they almost give away terabyte hard drives. And Bruce, I have moderated numerous lists and

Re: [EVDL] battery cell information johnson 24s cells

I looked at the website for "Johnson Controls" solar cells, It looks sketchy to me. Where is the Johnson Controls part number? Is this used or off spec hardware? "Johnson Controls" is a good name to throw out there, but it seems like more information would be available if it really is the Johnson

Re: [EVDL] EVLN: Failed Tesla eMMC bricks(kills) pack> warranty-over= sol

https://www.datalight.com/solutions/technologies/emmc/what-is-emmc On Sat, May 11, 2019 at 9:33 AM EVDL Administrator via EV wrote: > On 11 May 2019 at 4:20, brucedp5 via EV wrote: > > > On the specific issue, the eMMC chip in older Teslas is based within > > the car's media control unit and

Re: [EVDL] switch DPDT wringing for hi/lo lights

I am not sure what you are trying to do and I don't want to figure it out, but I will say you can definitely jumper the terminals and something will happen. I used to design switches for Eaton Corp and it was common to ship some configurations with this kind of mod. For example a DPDT can be used

Re: [EVDL] NMC /w zero volts

Keep in mind that many hand held meters cannot accurately report mOhms. You should look up the specs on your meter to see what it is actually capable of. Virus-free. www.avg.com

Re: [EVDL] EVLN: ?aboutface/turnabout?> TMC EVs.cn (C-HR battery electrics)

That concept looks ridiculous. An EV of merit should be streamlined to maximize efficiency. This idea is clearly about aggressive appearance and little else. I have owned and appreciated many Toyota cars, but in the realm of EVs they have been nothing but disappointing. Once again. On Fri, Apr

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

Electrolysis has thermodynamic limits to efficiency, but making H2 and O2 are a good way to store, large scale, renewable energy for which no other means are as environmentally sound. We don't want to dam up any water courses if that is possible, so more pump storage is to be avoided. It would be

Re: [EVDL] Solar off grid with an EV?

; <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Fri, Jul 12, 2019 at 7:15 PM Robert Bruninga wrote: > Microinverters will not work without a grid > bob > > -Original Message- > From: EV On Behalf Of Michael Ross via EV > Sent: Friday, July 12, 2019 6:57 PM > To:

Re: [EVDL] Solar off grid with an EV?

Micro-inverters. Yes, grid tie is best. And most economical and completely normal. That is true for residential solar generally, most homes will benefit from grid tie. So no problem. On Fri, Jul 12, 2019 at 7:21 PM jim via EV wrote: > Microinverters that are currentlly available require grid

Re: [EVDL] Solar off grid with an EV?

I haven't looked closely at this, but panels with on board micro-inverters are nice because you can buy one now, buy another one later, etc., until you have the kW you want. They output 120VAC. Seems like a good way to support an EV, or at least cover some of the charging with solar. I suspect

Re: [EVDL] Solar off grid with an EV?

It seems like I am being misunderstood. You can buy solar arrays each with its own MPP and inverter to produce 120VAC. You can buy one and add more over time with out consideration of string balancing and such. You can tie them to the grid, and if your rate plan us good then you will be

Re: [EVDL] Solar off grid with an EV?

I get all that because I have panels and a net metering plan with Duke Power. As I said it depends on whether your utility supports what you want to do. Clearly, YMMV. I personally could do exactly as I described. If I had an EV that needed charging regularly, I could put up a ground based array

Re: [EVDL] Solar off grid with an EV? (transformers)

have some 500W > and > > >2500W 120 VAC to 240VAC transformers. Great for stepping up a single > > phase > > >120v generator to 240 VAC for a well pump or other emergency power > needs. > > > > > > > > > https://baltimore.craigslist.org/ele/d/gle

Re: [EVDL] Solar off grid with an EV?

Duke is not going to stop residential power generation, just discourage it. it would be a PR nightmare for them here. The cost of power is quite low at $0.11 per kWh. They do have a base connection service cost that I pay even if I break even on the give and take, it is about 200kWh x $0.11 =

Re: [EVDL] Solar off grid with an EV? (transformers)

I see maybe one long duration outage (half a day?) a year that requires tending to the refrigerator. It never lasts too long, minutes not days. Not enough to fund a generator. If you ever go camping it is easier than that. Lots of generators get sold around here (hurricanes are intermittent

Re: [EVDL] battery cell information johnson 24s cells

I am not sure what you want the depth of discharge graph for. The cells won't be identical and the graph would actually be a band, or range about an average DOD. It might be advantageous to measure the capacity of each cell and return any that seem to far out from the others. If you are not

Re: [EVDL] Farm EVs & PV-powered auton e-bot planter, weeder swarms> ag e-transition= e-revolution

Nothing about EVs is all that economical - today. The tech is new. The EV economies of scale are a fraction of what exists - today. The Infrastructure to provide large scale, stationary or mobile charging is not there - today. To be sure the battery weight issue is easier to to solve with a lot of

Re: [EVDL] The Tesla conspiracy

I see the naming slipping - Gigafactory in Nevada means a battery plant. In Shanghai it is an automobile manufacturing facility. Yes, Telsa is very sharp working in China, as long as they don't get nationalized. Musk is true to his word wanting to keep EVs rolling along. He will go all in as many

Re: [EVDL] The Tesla conspiracy

. Glad its not me. On Sun, Aug 18, 2019 at 12:18 PM EVDL Administrator via EV < ev@lists.evdl.org> wrote: > On 18 Aug 2019 at 9:45, Michael Ross via EV wrote: > > > Diversification of politics. No question about acting up on Chinese > > internet, can't do it. > > Yeah,

Re: [EVDL] The Tesla conspiracy

Musk simply broke the rules when he falsely claimed to have a buyer. The SEC doesn't have to be in some conspiracy to react very strongly to that kind of public commentary. When he said that the stock price went haywire and some people lost money reacting to it. The SEC exists at least in part to

Re: [EVDL] The Tesla conspiracy

"It also didn't hurt that Tesla had a billionaire EV enthusiast behind them." There's an understatement. Nothing was going to happen without Musk and Straubel. And there was no billionair-ness when they started. Despite the unlikeliness of success that still surrounds it, the most important part

Re: [EVDL] ] *8/30-31 only: BuyNow $1.7k priced, Elf enclosed_e-trike SF-CA> needs battery

I own one and I have walked the hills in San Fran, you are not going to like it there. You will bust a gut trying to go up, and wish it was a car trying to slow and stop going down. I speak from experience as a long time cyclist and one who commuted 25 miles each way on an ELF. You had better be

Re: [EVDL] EVLN: Mazda Does Not Believe In Large-kWh EV packs (v)

Well Mazda does make good Wankels and if you run them in their sweet spot they get quite good mpg. Wankels can be tiny and make lots of high speed RPMs, no vibration at all. Maybe they are a good option for a hybrid where it is really running on electrons out the wheels. It is a hybrid then a

Re: [EVDL] li ion battery in cold weather

I am late to this discussion and have little to add, but this called me to comment: "I did a bit of research. Some authors talk about "intercalation", which happens below freezing. Intercalation is when the anode becomes plated with lithium ions instead of the ions being absorbed into the anode."

Re: [EVDL] Farm EVs & PV-powered auton e-bot planter, weeder swarms> ag e-transition= e-revolution

Bob, You are right that is a very interesting article.Thanks for bumping it up in my mind. http://www.impactlab.net/2019/08/03/electric-powered-farm-vehicles-set-to-revolutionise-agriculture-sector/ On Sun, Aug 4, 2019 at 8:23 PM Robert Bruninga via EV wrote: > When I actually looked at the

Re: [EVDL] EVLN: Farm EVs & PV-powered auton e-bot planter, weeder swarms> ag e-transition= e-revolution

We already do battery swaps with fork lifts - like forever. Tesla demo'd a swap that was the same time as half a tank fill up on a car. Seems like the day long use is surmountable. Virus-free.

Re: [EVDL] Solar off grid with an EV? (DC AC/heatpumps and waterheating)

There was a time when solar thermal and its 70% efficiency made sense, because PV cost too much. But that time has passed. I think that PV is now better than solar thermal. There are a lot of hidden costs and difficulties putting a thermal collector on one's roof. There is a bunch of piping that

Re: [EVDL] EVLN: Tesla drops cheapest models prices (v)

Dave, You seem to have a strong urge to rag on Tesla and Musk whenever you can. That seems unwarranted. They have done a lot in an incredibly difficult industrial environment, working at something no one believed possible, and actually have a lot of success, though they may yet fail. We will all

Re: [EVDL] EVangel-About: ?Do I really want to be a Cyberpunk?

The CyberPickup might actually be very functional. Not easy to tell because it is visually incomparable. There are a lot of opportunities for the truck that electrification will open up. Torque will be enormous. It will be batshit crazy fast compared to contemporary PUs. It will have all the

Re: [EVDL] Deaf Scooter and Palmdale Sheriff Coal Rolled. Consequences!

That rumor could go viral and I would like it. On Thu, Mar 5, 2020 at 1:46 PM Peri Hartman via EV wrote: > Sounds doubtful. I wouldn't be surprised if there was a law that would > apply. But a $25K fine, vehicle crushed, license suspended sound highly > exaggerated. > > Peri > > -- Original

Re: [EVDL] Cheapest off grid storage but can it be used to make electricity.

It is an inspired and compulsive goal to be off grid. He is not accounting for labor and the enormous complication to his home. He is not accounting for the far greater value of his time. What he is doing to his house will never be appreciated when he tries to sell it and move, so he is anchored

Re: [EVDL] dink GM hummer as pu e-truck = ( :dumb: ... ?vaporware?)

Typo in the last sentence. Should have read: "Could it someday become a symbol of a new, more sustainable erection?" On Sat, Jan 11, 2020 at 9:38 PM brucedp5 via EV wrote: > > > (?vaporware? as -GM pr- , automakers @their wasteful-worst) > >

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

It is important to figure out what the #cycles means to you personally. 1000 cycles is a lot even daily - for some people. On Thu, Apr 16, 2020 at 2:39 PM paul dove via EV wrote: > Cycle Life (retaining 70% capacity) at 20A Discharge, 100% DOD: >1,000 > cycles > > This tells me you don’t want

Re: [EVDL] .tw Tesla-3 crashes, over-turns (v)

Mmm, good idea with the water. On Thu, Apr 16, 2020 at 5:54 AM evln via EV wrote: > > > https://taiwanenglishnews.com/tesla-catches-fire-after-crash-driver-dies/ > Tesla catches fire after crash: driver dies > April 3, 2020 A Tesla Model 3 caught fire after hitting a traffic island > and

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

> The issue becomes entangled with calendar life. Calendar life is a steep > function of temperature. Exponential, actually. > > Bill D. > > On 4/17/2020 9:09 AM, Michael Ross via EV wrote: > > Then you run up against an insignificant sample size. Can you get specs > an

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

know how much faster it will degrade at 50 amps. > > 75% in 800, 500, 200 cycles, etc. > > I would buy one and test it first. > > On Thursday, April 16, 2020, 1:54:04 PM CDT, Michael Ross via EV < > ev@lists.evdl.org> wrote: > > > It is important to figure out what th

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

at 3:11 PM Lee Hart via EV wrote: > Michael Ross via EV wrote: > > 1C huh? That is not stressful at all and only a truly sh#t cell would > > have much trouble with that. > > Ah, but that is heavily dependent on the kind of cell you are testing. > There are many types of c

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

Hi Bill, Thanks for the commnet. I have no connection with testing the last 5 years so I was wondering. You probably have more reason to care about this than almost anyone. 1C huh? That is not stressful at all and only are truly sh#t cell would have much trouble with that. Isn't it lovely that

Re: [EVDL] Musk throws another tantrum

The occurrence of OSHA violations is very dependent on the state of the occurrences. In North Carolina we have about 10 million people, 100 counties, and 11 inspectors. You are pretty certain never to see an inspector here unless someone dies on the job. On Tue, May 12, 2020 at 11:10 AM Mark

Re: [EVDL] Musk throws another tantrum

it. You clearly don't like Musk, but he is capable of more than you believe. I believe. On Sun, May 10, 2020 at 11:51 AM EVDL Administrator via EV < ev@lists.evdl.org> wrote: > On 10 May 2020 at 9:36, Michael Ross via EV wrote: > > > I am betting his approach is to

Re: [EVDL] Musk throws another tantrum

ev@lists.evdl.org> wrote: > On 10 May 2020 at 9:36, Michael Ross via EV wrote: > > > I am betting his approach is to try to forge ahead and at the same time > > try to make it safe for his employees. > > You may know something that I don't, but that's not a bet I'd mak

Re: [EVDL] Musk throws another tantrum

I promise this is not OT. Though What Musk does with his businesses could be considered such. As an at risk, well educated, and following the science closely person I get it that we need to be very strict to reduce sickness and death from the novel coronavirus. This is a very tricky one since

Re: [EVDL] Musk throws another tantrum

powered iPhone > > > On May 10, 2020, at 4:01 PM, Willie via EV wrote: > > > >  > > > >> On 5/10/20 11:38 AM, Michael Ross via EV wrote: > >> It is a classically human response to be continually biased, and not > taking > >> in new information,

Re: [EVDL] EVLN: Fluoride-ion cell packs bigger punch than lithium-ion

I think Toyota is seriously stodgy, but it is not stupid to go with a proven winner. They have a selling point about range and availability of refueling options, for now at least. They are choosing to follow cultural norms that are passing, but not past. It is probably good business, or at least

Re: [EVDL] EV Digest, Vol 95, Issue 18

I thought Solarcities had US factories. And Sunpower. I haven't kept up so I could be spinning old news. On Fri, Sep 18, 2020, 7:17 PM Offgrid Systems via EV wrote: > "I couldn't name a single U.S producer of PV > > modules, and the BOS equipment is mostly assembled in China as well." > > Only

Re: [EVDL] 9 professional cyclists provide tiny charge2 Tesla-X EV (v)

Jeez what waste of time. A little arithmetic yields the same answer. Most of us can produce about 125 watts with our leg muscles for continuously for an hour. I have heard that the inglorious Lance Armstrong could maintain 750 watt (a horsepower)for a while. It is probably generous to say those

Re: [EVDL] Confused L.Vegas-NV Tesla driver fillup-frustrated @petrol-pump (v)

It doesn't look staged, it looks like the guy is clueless. My guess is he rented it. On Sat, Jul 18, 2020 at 10:06 PM EVDL Administrator via EV < ev@lists.evdl.org> wrote: > Ha ha, isn't that hilarious? Guy buys a Tesla without knowing it's an EV. > > I haven't seen it - I don't do Fakebook -

Re: [EVDL] LiFePO4

Well said, Dave. I will hang onto my '89 Toyota pickup with those awesome crank windows and new fangled electronic ignition, no AC. It is 30 years old now and in NC I don't even have to get it inspected for safety anymore. (Isn't that strange?) It is hard for cars with lots of little motors and

Re: [EVDL] LiFePO4

this was true for LiFePO. Worst thing you could do was charge fully and let the pack get moderately warm/hot. Maybe they have better electrolytes now. On Thu, Jul 9, 2020, 2:19 AM EVDL Administrator via EV wrote: > On 8 Jul 2020 at 23:39, Michael Ross via EV wrote: > > > Used to be, I am

Re: [EVDL] LiFePO4

Used to be, I am out of touch, that less than 100°F and 100% SOC was a recipe for significant battery degradation. Not say they haven't solved this, but 5 year old cells would not be very good in this respect. On Wed, Jul 8, 2020 at 8:06 PM Bill Dube via EV wrote: > I don't think that LiFePO4

Re: [EVDL] LiFePO4

Yes, I can't justify $40k for a car. That is just crazy to me. I am driving Scion xB with 250k+ miles on it that I paid $11.9k for with 9K miles on it. That is the kind of value I need for me to retire and be financially secure. Taking a loan out for $40k is not going to happen. On Thu, Jul 9,

[EVDL] OT: My E- mower power supply died, help?

Hi all, I have been using a nice programmable AMREL 80V PS for years now to charge my old Black and Decker 24V mower. The PS not working and I would like to get something newer and appropriately priced for the application. Can any of you recommend a good 24V lead acid charger? Or perhaps tell me

Re: [EVDL] OT: My E- mower power supply died, help?

best > by far. It’s a Greenworks 40V power-assisted. > > > > > > - Mark > > > > Sent from my Fuel Cell powered iPhone > > > >> On Jun 23, 2020, at 4:48 PM, Michael Ross via EV > wrote: > >> > >> Hi all, > >> I h

Re: [EVDL] EVLN: $40k Nissan Ariya fwd .jp EV r:300mi

The positive electrode becomes very reactive at near fully charged and this damages the electrolyte. As mentioned charging the last bit is a slow process. So Tesla limits the charging to extend battery life and to make charging to "100%" faster. On Wed, Jul 22, 2020, 5:23 PM Peter VanDerWal via

Re: [EVDL] EVLN: $40k Nissan Ariya fwd .jp EV r:300mi

I always thought they took the buffer from both the high and low ends of SOC%. You don't want to totally deplete or charge a pack to get the longest life from it. On Wed, Jul 22, 2020, 10:43 PM Bobby Keeland via EV wrote: > It is interesting. I never thought about whether Tesla took the

Re: [EVDL] 'All's not well with UK public charging' / Autonomy

The gravitational energy you put into a vehicle climbing a hill, comes back to you on the downhill side. The effect of weight is often overestimated for this reason. Battery power is very efficient, in terms of how much you put in, is close to what you get out, unlike with fossil fuels which are

Re: [EVDL] TMC's Toyoda swipes@ Tesla> (we make real food)

If Toyota or another company does well it will be because they make a car that competes well. That is what Musk has wanted all along. This is not a zero sum game, and it will take 10 years or more to make a dent in the ICE population. Toyota needs to say this because they have been dense,

Re: [EVDL] Bloated Trucks/Suvs (one isn't)

The cyber truck has the same silhouette as an F150. It looks bigger but Its not. F150s don't usually get descriptions like, can't park in the city, behemoth, and so on. I do understand that size truck is mostly over what is needed. I use a Scion xB with no rear seats for every thing. I have hauled

Re: [EVDL] hydrogen isn't green, after all

From the WIKI: "Considering the industrial production of hydrogen, and using current best processes for water electrolysis (PEM or alkaline electrolysis) which have an effective electrical efficiency of 70–80%" I actually thought 70% was as good as it gets, but they think in another 10 years it

Re: [EVDL] hydrogen isn't green, after all

I see that my previous idea was all about ICE, not fuel cells. I know nothing about FC efficiency, Lot's a prognostication about how this will turn out. It seems that some production methods of hydrogen might be very efficient, like up to 98% if you can believe it. The fuel cell efficiency is a

Re: [EVDL] hydrogen isn't green, after all

t; > > On Aug 15, 2021, at 1:03 PM, Robert Bruninga via EV > wrote: > > > > But then there is still the 30% loss in inefficiency in all the heat > loss in > > compressing the hydrogen into tanks. (and hoping it wont explode). > > Bob > > > >>

Re: [EVDL] LIVE stream 8/31/21 1540 PST A physicist consultant to power utilities on how the EV mass adoption is affecting the

We have a nation wide grid and a market for power. Storage is less of a problem than cost. CA may not be selling at a price people are buying. It's also hard to raise level of pump storage when the water gets used for ag. My first guess is CA has distorted the market with subsidies, etc. It is

Re: [EVDL] LIVE stream 8/31/21 1540 PST A physicist consultant to power utilities on how the EV mass adoption is affecting the

31 Aug 2021 at 21:55, Michael Ross via EV wrote: > > > My first guess is CA has distorted the market with subsidies, etc. It is > > likely a pendulum swing, the asking price will have to come down. Supply > > greater than demand. Some one is going to get some electrons b

Re: [EVDL] LIVE stream 8/31/21 1540 PST A physicist consultant to power utilities on how the EV mass adoption is affecting the

If you take a longer view, SoCal has an excess of non-RE power that needs to be shipped pretty far away. If climate change remediation is going to really happen we need to fill the status quo. The consumers will pay one way or another, with increasingly poor climate outcomes, and all the cost

Re: [EVDL] LIVE stream 8/31/21 1540 PST A physicist consultant to power utilities on how the EV mass adoption is affecting the

There is going to ba a point above which recycling batteries into new ones has a better payback than using them for storage. And, above which H2 and other less material intensive tech will be better storage. Tech will advance On Wed, Sep 1, 2021 at 2:43 PM Ed Blackmond via EV wrote: > > > > On

Re: [EVDL] LIVE stream 8/31/21 1540 PST A physicist consultant to power utilities on how the EV mass adoption is affecting the

Batteries on a large scale fall behind H2 storage if you have big enough tanks, and if you correctly factor in the costs of batteries and tanks. Where the lines cross is an open question. I live 10 miles from a big gas depot in Selma NC. They hold lot and are very simple, big inverted buckets

Re: [EVDL] LIVE stream 8/31/21 1540 PST A physicist consultant to power utilities on how the EV mass adoption is affecting the

"that the grid can't handle" is just another example of market distortion. It is a choice of the market, not to say "the grid can't handle so much generation of non-RE." There is a lag in response of the market when you build a gas plant or a nuke that can't be turned down when the cost leans

Re: [EVDL] LIVE stream 8/31/21 1540 PST A physicist consultant to power utilities on how the EV mass adoption is affecting the

In today's local paper is an article about FlexGen in Durham NC, they're raised $150M. They build "software that helps grids manage energy storage." Doesn't sound exactly like market and also not hardware management software. " FlexGen's energy storage solutions bridge the gap of reliability for

Re: [EVDL] Tesla Launches Entry Model 3 with Newer LFP Battery Tech in the U.S. - TeslaNorth.com

No, they will be a lot better. The ones we got on the open market were crappy. Tesla can't afford crappy batteries that can't take even moderately high temperatures. They can't have such a low energy density and low power density. If they are doing LFP it is because they made significant

Re: [EVDL] Tesla Launches Entry Model 3 with Newer LFP Battery Tech in the U.S. - TeslaNorth.com

This is far more about stationary storage where range is not a concern and temperature management is far easier to maintain. LFP have always been a useful option in stationary applications. I suspect good work has been done to improve the additives in electrolyte solutions. On Thu, Oct 21, 2021

Re: [EVDL] Study compares electric vehicle charge costs vs. gas — and results were misleading Yahoo

That is prejudicial nonsense. On Sun, Oct 24, 2021 at 8:40 PM EVDL Administrator via EV wrote: > On 24 Oct 2021 at 22:27, Lawrence Rhodes via EV wrote: > > > Mr. Anderson and his company have 20 years-experience of consulting > > with the auto industry and have been providing accurate data over

Re: [EVDL] LiFePO4 EOL behavior

The worst thing you can do to LiFPO is to charge it fully, and let it sit around, especially in a hot location. For long term storage, I would guess the best thing is maybe 50% SOC, and keep it as cool as you can without actually refrigerating it (though I don't know if that is a bad thing). You

Re: [EVDL] LiFePO4 EOL behavior

ev@lists.evdl.org> wrote: > On 24 Jul 2021 at 21:04, Michael Ross via EV wrote: > > > The worst thing you can do to LiFPO is to charge it fully, and let it sit > > around, especially in a hot location. > > Isn't that the case for lithium batteries of any chemistry? I'm not a

Re: [EVDL] LiFePO4 EOL behavior

For LiFePO, a parasitic load might be protective. It's that full charge that is destructive. On Sat, Jul 24, 2021 at 11:40 PM EVDL Administrator via EV < ev@lists.evdl.org> wrote: > On 24 Jul 2021 at 21:04, Michael Ross via EV wrote: > > > The worst thing you can do to

Re: [EVDL] LiFePO4 EOL behavior

ev@lists.evdl.org> wrote: > >> On 24 Jul 2021 at 21:04, Michael Ross via EV wrote: >> >> > The worst thing you can do to LiFPO is to charge it fully, and let it >> sit >> > around, especially in a hot location. >> >> Isn't that the case for

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