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dpack

Joined: 02 Jul 2005
Posts: 43862
Location: yes

Posted: Tue Mar 25, 25 12:09 pm Post subject:

ammonium.........

fairly harmless

vehicle airbags are very rapidly filled with a tiny amount of semi stable azide (no idea what types they use) as propellant with an electric starter

azides are not for me , ever, a silver bracelet and an ice car is a recipe i know and i will never use

bimetal salts is a harmless euphemism for death wish

that sodium azide is the scariest substance i have handled, there have been a few

if i was in that situation again i would phone Catterick UXO and ask if they were busy today

dpack

Joined: 02 Jul 2005
Posts: 43862
Location: yes

Posted: Tue Mar 25, 25 12:27 pm Post subject:
unstable and keen on entropy vs toxic as a cupboard find i much prefer toxic

Slim

Joined: 05 Mar 2006
Posts: 6675
Location: New England (In the US of A)

Posted: Tue Mar 25, 25 2:24 pm Post subject:
Descriptions of hydrofluoric acid always made me a bit anxious

dpack

Joined: 02 Jul 2005
Posts: 43862
Location: yes

Posted: Tue Mar 25, 25 7:24 pm Post subject:
F if it is contained it might be safe, loose is no longer contained U and 6F is spin city F as a salt is ace for dental care i have never played with it, Cl and Br are "interesting" in elemental form Cl I and Cl Br are very interesting, odd crystal forms, and daft corrosive/unpleasant as "simple chems" might be rated

Mistress Rose

Joined: 21 Jul 2011
Posts: 16273

Posted: Wed Mar 26, 25 8:48 am Post subject:

Hydrofluoric acid is nasty. I have used fluoboric acid and that was the only time I was actually instructed to wear gloves. We used to do tin/lead plating and the bath was fluoboric acid based. The gold was cyanide based. I also had an electroless copper tank that was black and thick in appearance with copper coloured bubbles. Most people wouldn't go near it as it looked as if something nasty was about to emerge. By most standards even the larger plating baths we were using were quite small, and the plating line I set up was even smaller, so not on what you might call an industrial scale where they can be the size of swimming pools.

jema
Downsizer Moderator

Joined: 28 Oct 2004
Posts: 28268
Location: escaped from Swindon

Posted: Sun Mar 30, 25 2:30 pm Post subject:

Battery claims
The following link is to the complete list of claims I have been compiling.

https://martindavidwalker.blogspot.com/2024/09/battery-claims.html

The new claims in the last week are as follows.
March 28th 2025, Hina launches Sodium EV batteries
The batteries boast 165wh/kg which is virtually on a par with many LFP batteries and can cope with 8000 fast charges and low temperatures. So on a 200 mile range battery that would be 1.6 million miles.
On the subject of sodium I'm starting to see adverts for home sodium batteries. The home is where cycle life becomes important. If my car battery only lasts 1000 cycles it probably wouldn't bother me. But a home battery could cycle twice a day in intense use. 1000 cycles then becomes 18 months. LFP can be as low as 3000 which is still under 5 years. 8000 takes us to over 10 years intense use.

https://cnevpost.com/2025/03/28/hina-sodium-ion-battery-solution-commercial-cars/
March 21st 2025, CATLs second generation Sodium battery
The claim is that it approaches LFP performance metrics with significant cost advantages. Notably it has been a set back for Sodium that the price of Lithium has come down drastically from its peak, but notably even then Lithium was just 25% of the cost of producing a battery pack. So with Lithium down 80% from it's peak in 2022 one has to ask if the significant cost advantage comes in production as well as materials? But as batteries become commodities â€œsignificantâ€ can mean just a few percent!
https://autonews.gasgoo.com/new_energy/70036285.html

jema
Downsizer Moderator

Joined: 28 Oct 2004
Posts: 28268
Location: escaped from Swindon

Posted: Sun Apr 06, 25 2:45 pm Post subject:

Did the trip to see Amipest, a journey that strikes me as a pain in a typical EV, but because the M3 has a closure we took a longer route back via M40, M4 and A34 unlike the M3 route where services are a pain, this route has I think 5 motorway services.
So it does come down to how much does it matter if it's not a trip being done that often?

Battery claims
The following link is to the complete list of claims I have been compiling.

https://martindavidwalker.blogspot.com/2024/09/battery-claims.html

The new claims in the last week are as follows.
April 1st 2025, Californian start-up Inlyte partners with Swiss manufacturer Horien on Sodium Iron Batteries.
Claims of very long life batteries with costs as low as $35 kwh. That translates to 0.3 cents a kwh when used as grid storage using readily available materials.
It really makes a mockery of Nuclear and non battery storage solutions.
https://newatlas.com/energy/sodium-iron-battery-storage-inlyte/

Nicky cigreen

Joined: 25 Jun 2007
Posts: 9931
Location: Devon, uk

Posted: Mon Apr 07, 25 11:58 am Post subject:

jema wrote:

I think you are right, it probably doesn't matter if it isn't something that you need to deal with very often. Out of curiosity, how far were you travelling, how often did you have to stop to recharge? and how long did each stop have to take for a recharge?

near me a site that once was a little chef has become one of the largest charging stations in the county, and the shop is a farm shop with cafe - it's become a popular stopping point.

dpack

Joined: 02 Jul 2005
Posts: 43862
Location: yes

Posted: Mon Apr 07, 25 2:57 pm Post subject:
muskie is scared of and challenged by them being better than him at making stuff(the money is irrelevant by now) BYD etc are his emotional problem far more than an economic one trump is arserelevant, old man doing beard for the players just a name on a brand

jema
Downsizer Moderator

Joined: 28 Oct 2004
Posts: 28268
Location: escaped from Swindon

Posted: Tue Apr 08, 25 6:20 am Post subject:

Nicky cigreen wrote:

jema wrote:

I don't actually have an EV, but pretend I do on long journeys. Mostly the hypothetical EV wins on time because it would start full.
this trip is designed to be awful for EVs. But still is only more inconvenient in that I would have to take the pain of stopping on the journey day.

Nicky cigreen

Joined: 25 Jun 2007
Posts: 9931
Location: Devon, uk

Posted: Tue Apr 08, 25 9:19 am Post subject:

jema wrote:

Nicky cigreen wrote:

jema wrote:

oh, I thought you had a nissan leaf - I wonder who i was thinking of then.

A useful exercise then.

I think an enforced stop isn't a terrible thing, we just need to adjust to accepting it.

gz

Joined: 23 Jan 2009
Posts: 9060
Location: Ayrshire, Scotland

Posted: Wed Apr 09, 25 2:09 pm Post subject:
An enforced stop is brilliant...too many drive for too long at a time

jema
Downsizer Moderator

Joined: 28 Oct 2004
Posts: 28268
Location: escaped from Swindon

Posted: Sun Apr 13, 25 5:00 pm Post subject:

Battery claims
The following link is to the complete list of claims I have been compiling.

https://martindavidwalker.blogspot.com/2024/09/battery-claims.html

The new claims in the last week are as follows.
April 11th 2025, 500% faster charging time in cold conditions
Lab claims a simple production change could radically improve charging times in cold weather.
https://www.topgear.com/car-news/electric/researchers-have-improved-ev-charging-cold-conditions-500-cent

dpack

Joined: 02 Jul 2005
Posts: 43862
Location: yes

Posted: Mon Apr 14, 25 9:51 am Post subject:

are batteries following the Moores Law curve?

in the last couple of years they feel to have improved faster than pooters did

the rate of increase in capacity from for example "bomb" to "deep blue" was not as fast as from lead acid to mass production this gen's rechargeable

the car adverts use "test bed" range results, since they started mentioning them they have gone up rather rapidly
they will not reflect the real world of road conditions and driving styles but they are a like for like comparison over time

some "reasonably price cars" are claiming over 500mpc, only a couple of years ago 130mpc was a bold sales brag

MPC, can i copyright mark it? no come across it as an abreviation to replace MPG(or GPM for muscle cars and tanks)

jema
Downsizer Moderator

Joined: 28 Oct 2004
Posts: 28268
Location: escaped from Swindon

Posted: Tue Apr 15, 25 6:39 am Post subject:
It's much slower than Moores law. probably less than 5% a year. but it depends a bit on what is being tracked. 5% might be the number on energy density. but factor in cost, safety, cycle life and the improvements are far greater.

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