Search found 3582 matches

by jonescg
Dec 05 2019 7:56am
Forum: Battery Technology
Topic: Can heating up battery give longer distance?
Replies: 12
Views: 481

Re: Can heating up battery give longer distance?

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...
by jonescg
Dec 04 2019 7:24pm
Forum: Battery Technology
Topic: Can heating up battery give longer distance?
Replies: 12
Views: 481

Re: Can heating up battery give longer distance?

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.
by jonescg
Dec 04 2019 2:24am
Forum: Battery Technology
Topic: Can heating up battery give longer distance?
Replies: 12
Views: 481

Re: Can heating up battery give longer distance?

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...
by jonescg
Dec 03 2019 7:34pm
Forum: Battery Technology
Topic: Can heating up battery give longer distance?
Replies: 12
Views: 481

Re: Can heating up battery give longer distance?

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.
by jonescg
Dec 01 2019 9:31pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5425
Views: 238941

Re: Wind and Solar vs Coal, Gasoline, Nuclear

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...
by jonescg
Nov 29 2019 3:03am
Forum: Motor Technology
Topic: OSU electric motor
Replies: 2
Views: 201

OSU electric motor

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...
by jonescg
Nov 26 2019 7:36pm
Forum: Large EV General Discussion
Topic: Ideas for EV farm machinery
Replies: 38
Views: 1363

Re: Ideas for EV farm machinery

^^

Agreed - now, back to the electric tractors!
by jonescg
Nov 26 2019 7:17am
Forum: Items for Sale - New
Topic: Assembled Hi-Power LiPo battery packs - any interest?
Replies: 566
Views: 108224

Re: Assembled Hi-Power LiPo battery packs - any interest?

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...
by jonescg
Nov 26 2019 5:39am
Forum: Large EV General Discussion
Topic: Ideas for EV farm machinery
Replies: 38
Views: 1363

Re: Ideas for EV farm machinery

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. ...
by jonescg
Nov 25 2019 9:19am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Bmw looks at frameless e-motorcycle design
Replies: 6
Views: 367

Re: Bmw looks at frameless e-motorcycle design

Oh the things you can do when you have your own alloy casting plant!
by jonescg
Nov 25 2019 6:47am
Forum: Large EV General Discussion
Topic: Ideas for EV farm machinery
Replies: 38
Views: 1363

Re: Ideas for EV farm machinery

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...
by jonescg
Nov 25 2019 3:05am
Forum: Large EV General Discussion
Topic: Ideas for EV farm machinery
Replies: 38
Views: 1363

Re: Ideas for EV farm machinery

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 ...
by jonescg
Nov 22 2019 1:46am
Forum: EV Business World
Topic: Tesla Cybertruck
Replies: 48
Views: 2377

Re: Tesla Cybertruck

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...
by jonescg
Nov 21 2019 10:09pm
Forum: Battery Technology
Topic: Criticise my modular pack design idea. 28s * 1s20p
Replies: 12
Views: 596

Re: Criticise my modular pack design idea. 28s * 1s20p

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 ...
by jonescg
Nov 19 2019 10:03pm
Forum: Items Wanted
Topic: Want Buyers for Group battery buy australia
Replies: 1
Views: 706

Re: Want Buyers for Group battery buy australia

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?
by jonescg
Nov 19 2019 7:29pm
Forum: E-Vehicles General Discussion
Topic: Taycan video with some useful information
Replies: 36
Views: 1884

Re: Taycan video with some useful information

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/
by jonescg
Nov 17 2019 8:21pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Savic Motorcycles - Savic C-Series
Replies: 4
Views: 956

Re: Savic Motorcycles - Savic C-Series

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.
by jonescg
Nov 15 2019 1:43am
Forum: Large EV General Discussion
Topic: 1988 Honda Prelude conversion - fastest build log ever.
Replies: 25
Views: 1404

Re: 1988 Honda Prelude conversion - fastest build log ever.

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 ...
by jonescg
Nov 11 2019 2:06am
Forum: Large EV General Discussion
Topic: 1988 Honda Prelude conversion - fastest build log ever.
Replies: 25
Views: 1404

Re: 1988 Honda Prelude conversion - fastest build log ever.

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...
by jonescg
Nov 10 2019 7:41pm
Forum: Large EV General Discussion
Topic: 1988 Honda Prelude conversion - fastest build log ever.
Replies: 25
Views: 1404

Re: 1988 Honda Prelude conversion - fastest build log ever.

... 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 ...
by jonescg
Nov 09 2019 4:04am
Forum: Large EV General Discussion
Topic: 1988 Honda Prelude conversion - fastest build log ever.
Replies: 25
Views: 1404

Re: 1988 Honda Prelude conversion - fastest build log ever.

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:
by jonescg
Nov 07 2019 8:29pm
Forum: Large EV General Discussion
Topic: 1988 Honda Prelude conversion - fastest build log ever.
Replies: 25
Views: 1404

Re: 1988 Honda Prelude conversion - fastest build log ever.

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 ...
by jonescg
Nov 07 2019 8:50am
Forum: Large EV General Discussion
Topic: 1988 Honda Prelude conversion - fastest build log ever.
Replies: 25
Views: 1404

Re: 1988 Honda Prelude conversion - fastest build log ever.

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...
by jonescg
Nov 07 2019 8:18am
Forum: Large EV General Discussion
Topic: 1988 Honda Prelude conversion - fastest build log ever.
Replies: 25
Views: 1404

Re: 1988 Honda Prelude conversion - fastest build log ever.

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 ...
by jonescg
Nov 07 2019 1:26am
Forum: Large EV General Discussion
Topic: 1988 Honda Prelude conversion - fastest build log ever.
Replies: 25
Views: 1404

Re: 1988 Honda Prelude conversion - fastest build log ever.

neptronix wrote:
Nov 07 2019 1:24am
24kwh of lipo, jesus christ.. got any burnout vids, Jones? :mrgreen:
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.