Electric Vehicles etc
- Thread starter Cardy George
- Start date
link1896
Mr Greenfield
Also, current lithium chemistries of the usual suspects don’t like the vibrations seen off bitumen.
oodnadatta track corrugations might do in a few cells.
Vibration inducing capacity loss is one thing, letting the red devil out of cells is another all together.
Engineering solutions will be found in time.
ozzybmx
taking a shit with my boobs out
Good info !
The underground vehicles will be the only battery powered ones, all the whoopies for across site and checking pipelines etc will still be the old faithful diesel donks.
Saying that... $2.39 a litre tonight
downunderdallas
Likes Bikes and Dirt
What about emtbs
link1896
Mr Greenfield
Yep, same area of concernWhat about emtbs
I’ve plans for researching this area, take a bunch of cells, panasonic, Samsung, murata, carefully sort them into quality groups, pana and Samsung will fall into 8-10 groups, murata 2 ( it’s the old Sony chemistry).
Once sorted properly, split up, half of each group goes into a paint shaker style rig, others static. Shake the bejesus out of them while under discharge, and compare to their static mates. Over 500 or so charge/discharge cycles.
Anecdotally, I’ve seen reports of owners buying two identical packs, one used for the MTB, one for the flat bar commuter, and the flat bar bikes pack being discharged fully daily, with 2-3 times the cycle count, with more capacity then the MTB pack, so I will create a controlled experiment and hopefully make some discoveries. Higher discharge rates do make a significant difference, if the MTB is using 20Wh/km and the flat bar commuter is using 10Wh/km this alone can account for a massive portion of the difference, but I am beyond curious.
downunderdallas
Likes Bikes and Dirt
Interesting I have not seen anything about this noted in relation to EV's or EMTB's in general consumer stuff.
link1896
Mr Greenfield
Here is a very recent article summarising the current state of affairs, fair bit has happened recently. Previous research I had read said something along the lines of this “lithium ion cells as used in modern EV’s, subjected to simulated on road vibrations, as typically found in Europe, shows cell capacity degradation is predominantly attributed to cycle count, and not vibrations, by an order of magnitude difference. Off road level of vibrations and their contributions to capacity depredations are not yet known and warrant further research”
I’m going to work on the MTB specific research, with an eye to setting up for repacking batteries.
Stredda
Runs naked through virgin scrub
That thing is like a rocket!
link1896
Mr Greenfield
Incredible machine.
All with the spectators within the danger zone. One tire failure away from a mass fatality when it barrel rolls through the crowd at Mack Jesus.
Chriso_29er
Likes Bikes and Dirt
Must say the first thing I thought of watching that was Le Mans 1955.
Incredible car, but seems the Duke needs to do a few safety upgrades to his driveway.
fjohn860
Alice in diaperland
You don't know it yet. But you already have an entry in the f/wits thread when you park you car in the garage with the bikes on the roof...
Haakon
has an accommodating arse
Whats the cost on a new glass roof on a Tesla I wonder...
beeb
Dr. Beebenson, PhD HA, ST, Offset (hons)
Yep.
Stredda
Runs naked through virgin scrub
My brother would know. Had to get his replaced on his model 3 when damaged in a hail storm
Stredda
Runs naked through virgin scrub
Ah those bales of hay are plenty safe enough! lol
Mount the battery in a water bath for two way damping!
Haakon
has an accommodating arse
Porsche to build Australian efuels plant in Tasmania, operational from mid-2026
A multi-million-dollar investment will result in carbon neutral synthetic fuels being produced in Australia
www.whichcar.com.au
beeb
Dr. Beebenson, PhD HA, ST, Offset (hons)
I wonder if "can be used on existing...trucks" will work as well as converting heavy diesels to LPG (ie: frequent, unscheduled engine rebuilds). I do think these synthetic fuels will be valuable for future heavy vehicle applications, but remain skeptical about the compatibility with existing vehicles/engines.Porsche to build Australian efuels plant in Tasmania, operational from mid-2026
A multi-million-dollar investment will result in carbon neutral synthetic fuels being produced in Australia
Haakon
has an accommodating arse
They are not like converting to LPG, this is a chemically identical fuel that has to meet existing fuel quality standards. You might tell the difference in extended oil changes as its a more "pure" fuel, but otherwise it behaves the same.
Haakon
has an accommodating arse
Aviation is the best example - you can be very very assured that engine performance and longevity is considered for commercial aviation! But it has been approved as a drop in replacement afaik.