Endless Sphere

I'm surprised it's that high! Then again, Tesla has spent a lot of time and money developing chemistry which is OK with heat, but that doesn't change the Arrhenius law. Yes and do you think they would do this if it caused early demise of battery packs and massive loss in revenue, due to warranty cl...

I'm surprised it's that high!
Then again, Tesla has spent a lot of time and money developing chemistry which is OK with heat, but that doesn't change the Arrhenius law.

So if its better for the battery and the capacity/distance and everything about it is good then why are we not doing this? Cause some of us live in a furnace... https://4.bp.blogspot.com/-vkAxZMO3riU/XFcTbcGXgJI/AAAAAAAAJV0/dzpGX9ya02kq2XU8qcxq-7gu7qM6NPf8wCLcBGAs/s1600/slomocoalfurnace.jpeg 35'C i...

Short answer is yes.

The battery DCIR drops the warmer it is, but also bear in mind anything over about 35'C is doing irreversible damage to the cells. You will get more range on warm days, but the overall calendar life of the cells will drop.

But as the article suggests, they've been aware of it for some time and have a plan to address it. I've been involved with a few of these DER meetings and Western Power are on the ball. I wouldn't be surprised if there's a policy by mid next year requiring all new solar installs to include a battery...

Not sure if this has been posted already, but NutsandVolts (aka Kyle's) old alma mater has been busy working on a crazy motor. https://car.osu.edu/news/2019/11/electric-motor-demonstrator-sets-two-world-records-two-hours-after-five-years-work?fbclid=IwAR2HHWoGGLw73R8knrO9JYMbf0Ssgg1mdxdwf2q6UrfPEol7...

^^

Agreed - now, back to the electric tractors!

Hi All, There's a bit of interest in buying some more cells for Australian customers. If you live in Australia and you want to place an order, please get in touch. I'll be hoping to order at least another 550 of the 35C continuous, 60 C peak LiPo pouch cells (9 mm thick, 50 mm wide, 135 mm long) and...

Very cool. Some observations though - Illinois cornbelt is some of the most amazeballs soil on the planet. They report rye yields in the order of 15 tons per hectare. In the WA wheatbelt, 1.4 tons per hectare is a cracker of a year. I'm surprised he pushed over all that straw just to grow pumpkins. ...

Oh the things you can do when you have your own alloy casting plant!

Maybe, but how do you define the efficiency of a tractor lifting rocks and sods? I mean there's some complicated physics to account for - it's not just mass and distance travelled over time anymore. I guess the fuel consumed is all you have to go on. Since you'll have torque from low speeds, it chan...

Unfortunately no-till agriculture and organic don't really work together (glyphosate and all that ;) ) but yes ploughing will still take a tremendous amount of energy. However if you spend most of your time on the tractor slashing grass, carrying hay or generally doing odd jobs, an electric tractor ...

It's certainly not to my taste, but good on them for being so totally different. I mean, it's a truck. It's designed to do a job and look like a family wagon is not one of them. The price is pretty good for it's capabilities. Why Bollinger couldn't do something with these numbers, for even twice the...

So is it just compression which keeps the cells in contact with the busbar? Most large 18650 packs have the cells constrained by a couple of plastic capture plates and the bus plate goes to the outside. Holes in the busplate allow a wire bond to extend down through the busplate, through the capture ...

I've generally found there aren't many discounts to be had with volume unless you're ordering 10,000 or more cells. Who are you sourcing through?

Article from Charged EVs about why the Taycan went with 800 V - it all comes down to the charging:
https://chargedevs.com/newswire/why-did ... taycan-ev/

Pretty sure the C stands for "Clearance". As in, ground clearance. The first iteration would have scraped on the tarmac pretty easily.

All the best to him. It will be a Tiawanese bike, but any option is a good one.

Interesting conundrum with the air conditioning. It looks like the battery coolant heat exchanger and the cabin evaporator together might end up being too big a load for the system. I can't exactly fit a new or bigger condensor, but I might be able to put a valve in where I can select between cabin ...

Cables - mostly 50 mm2 double insulated flex. The only shielded HVDC cable is the stull already in the orange conduit. No issues with EMI anywhere really - the biggest source is the motor and controller, and those cables are less than a metre long. Battery pack can be dropped out in under an hour, b...

... With EV's I had always assumed there was a non-belt driven AC Which sounds handy for Projects No idea. -methods I went and bought an aircon compressor which runs off the battery pack (200-400 V DC) and is controlled by PWM or +12 V enable. I have just decided to use the +12 V enable, using the ...

Just had the coilovers installed. It rides like a million bucks! No wobble-board, decent ride height, no wallowing or roll, but not a harsh ride either. New ride height.jpg All I need to do now is get the aircon installed and it's ready to get handed over.... once I have a few more drives... :shock:

160km is pretty nice.. considered doing some aerodynamics mods? IE bottom panels, gap sealing, rear wheel wells, etc? The ecomodder forums could be real helpful here. Wheel spats would make a big difference, but being a 4-wheel steer car it might be tough to mount. I think there is something to be ...

I did a slightly longer drive today - 95 km, but most of it was at 70-90 km/h with the odd stretch at 100. It seems to pull 18 kW at highways speeds, which is pretty good for a conversion I think. 8 kW - 60 km/h 10 kW - 70 km/h 13 kW - 80 km/h 17 kW - 90 km/h 19 kW - 100 km/h Although this is on fa...

The car is technically licensed, it's just had modifications which haven't been signed off yet ;) The modules are 12s10p LiPo, 7000 mAh cells. Each module is 194 mm wide, 310 mm long and 168 mm tall, weighing 19 kg. I have 6 in the fuel tank space and 2 in the spare wheel well of the boot. No spare ...

neptronix wrote: ↑

Nov 07 2019 1:24am

24kwh of lipo, jesus christ.. got any burnout vids, Jones?

Hehe, it's the high energy density stuff, not the high C-rate stuff. Anyway, I think the motor/controller is the limiting factor. It lights up the tyres in 2nd pretty well, but pretty docile really.