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by jonescg
Yesterday, 20:47
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 29
Views: 756

Re: Prelude conversion project - some questions

Yes, correctly spotted ☺. Pin 5 wouldn't grip the solid core wire properly so I used 2 instead.

...pedant. 😆
by jonescg
Yesterday, 14:57
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 29
Views: 756

Re: Prelude conversion project - some questions

Proof that it works :)
Uno thermistor.jpg
Uno thermistor.jpg (120.01 KiB) Viewed 16 times
by jonescg
Yesterday, 14:54
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 29
Views: 756

Re: Prelude conversion project - some questions

Lo and behold I got there in the end :) Just using a 100 k NCT thermistor as a voltage divider and an Arduino to control a couple of digital outputs. // This sketch is a simple if-then system. If the analog input sensor exceeds the first setpoint, pin 4 goes high. // If the sensor exceeds the second...
by jonescg
Yesterday, 08:39
Forum: Tesla EVs
Topic: Inside a Model 3 battery
Replies: 3
Views: 87

Re: Inside a Model 3 battery

Looks like the cells are cooled radially - consistent with earlier reports of battery cells being glued to cooling strips like bandoleers.
http://www.motortrend.com/news/tesla-mo ... teardown-9
by jonescg
Wed, 25 Apr 2018, 10:48
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 29
Views: 756

Re: Prelude conversion project - some questions

It was for the battery cooling, but if I can plumb into the car's AC it should be more effective and take up far less space. I've devised a bit of a flow-chart for how the battery thermal management system will work. Battery thermal management program.png In essence, if the temperature is below 22 d...
by jonescg
Sat, 21 Apr 2018, 14:19
Forum: Tesla EVs
Topic: Inside a Model 3 battery
Replies: 3
Views: 87

Re: Inside a Model 3 battery

Some interesting observations: It appears that the cells are all standing up in the same orientation. The negative busbar (you can see the black pen) has the fusible links connected to the side of the cell can (negative terminal) while the positive terminals are fused to the next busbar along in a s...
by jonescg
Fri, 20 Apr 2018, 20:22
Forum: Tesla EVs
Topic: Inside a Model 3 battery
Replies: 3
Views: 87

Inside a Model 3 battery

Some of us have been waiting a long time to get a tid-bit of information about how Tesla has put their Model 3 battery packs together. Not because they are necessarily good (although, that they are) but because its always something rather unique. And that it is :shock: Model 3 battery5.JPG Model 3 b...
by jonescg
Fri, 20 Apr 2018, 09:01
Forum: Charging Infrastructure
Topic: Powering the home from spare EV charge?
Replies: 5
Views: 80

Re: Powering the home from spare EV charge?

If you plan on building an EV, you can plan your home storage battery as well. Yes, the two batteries can (and probably should) differ - EV batteries are generally rated to high power discharge, while home storage cells are less powerful (and therefore cheaper). If the battery of the vehicle is betw...
by jonescg
Wed, 18 Apr 2018, 14:37
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 29
Views: 756

Re: Prelude conversion project - some questions

All good - since found a supplier of gas/liquid heat exchangers which are easily incorporated into the car's AC.
by jonescg
Wed, 18 Apr 2018, 12:20
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 29
Views: 756

Re: Prelude conversion project - some questions

http://www.engelaustralia.com.au/produc ... ctid=21607

Now this looks interesting. Assuming your vehicle doesn't have an AC system already, I wonder if this would be a practical option?
by jonescg
Tue, 17 Apr 2018, 14:05
Forum: Charging Infrastructure
Topic: The Energy Retailers Strike Back. Will Cheap Off Peak Rates Kill Battery Storage?
Replies: 14
Views: 194

Re: The Energy Retailers Strike Back. Will Cheap Off Peak Rates Kill Battery Storage?

I think the EV plan is more about setting a system up and tweaking it later. Right now, a general off-peak rate is better value than the EV rate, but the $200 incentive makes it worth considering. I would think that midday will soon become the cheapest (and most stable) time to charge an EV. Workpla...
by jonescg
Sun, 15 Apr 2018, 20:17
Forum: For Sale/Wanted
Topic: FS 2011 i-MiEV repairable writeoff (*SOLD*)
Replies: 19
Views: 447

Re: FS 2011 i-MiEV repairable writeoff (*SOLD*)

Well done Arron! And Simon, I hope your home inspection is fast and painless...
by jonescg
Sun, 15 Apr 2018, 19:45
Forum: Charging Infrastructure
Topic: The Energy Retailers Strike Back. Will Cheap Off Peak Rates Kill Battery Storage?
Replies: 14
Views: 194

Re: The Energy Retailers Strike Back. Will Cheap Off Peak Rates Kill Battery Storage?

Hi Patrick, I think the net result is ultimately good for the customer - if cheap rates at specific times of day undermine the economics of battery storage, then the customer saves money by charging their EV / doing their laundry / setting the hot water system etc accordingly and not buying the batt...
by jonescg
Sun, 15 Apr 2018, 11:27
Forum: Batteries, charging, management and monitoring
Topic: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Replies: 210
Views: 6554

Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale

So there's a mountain of evidence to suggest the Kilowattlabs product is in fact a lithium titanate battery, and not a capacitor (super or otherwise) and yet you maintain that it's perfectly okay to call it a supercapacitor?

I might hop on my hoverboard* and ride to the shops.

*actually a bicycle
by jonescg
Fri, 13 Apr 2018, 19:21
Forum: Mitsubishi
Topic: Aftermarket iMiEV battery upgrade project
Replies: 8
Views: 238

Re: Aftermarket iMiEV battery upgrade project

Yeah, I'm thinking of something like that - basically a copper interconnect between the series connections, but soldering is my best option there. It makes for a less conductive thermal path for axial cooling plates, but it might be good enough.
by jonescg
Fri, 13 Apr 2018, 18:45
Forum: Blade EVs
Topic: Vacuum pump
Replies: 4
Views: 96

Re: Vacuum pump

When you find one we'll order two... the Prelude will need one too
by jonescg
Fri, 13 Apr 2018, 15:27
Forum: Mitsubishi
Topic: Aftermarket iMiEV battery upgrade project
Replies: 8
Views: 238

Re: Aftermarket iMiEV battery upgrade project

I don't know of any 18650 cells with such features unfortunately.
by jonescg
Fri, 13 Apr 2018, 14:42
Forum: Mitsubishi
Topic: Aftermarket iMiEV battery upgrade project
Replies: 8
Views: 238

Re: Aftermarket iMiEV battery upgrade project

At the moment, the prismatic cells are cooled by just having air blown past, I think, air-conditioner chilled air if on a fast charger. It seems to me that the hexagonal array would be more porous to air flow than single solid rectangular blocks and might be better cooled without any special effort...
by jonescg
Fri, 13 Apr 2018, 13:14
Forum: Mitsubishi
Topic: Aftermarket iMiEV battery upgrade project
Replies: 8
Views: 238

Re: Aftermarket iMiEV battery upgrade project

I don't know to be honest. I think there is a 're-learning' process involved, and the SOC would surely be a combination of coulomb counting as well as monitoring cell voltages. At least the capacity increase would only be 45% more than the original, so it's not too far off. My bigger concern is the ...
by jonescg
Wed, 11 Apr 2018, 22:00
Forum: For Sale/Wanted
Topic: FS 2011 i-MiEV repairable writeoff (*SOLD*)
Replies: 19
Views: 447

Re: FS 2011 i-MiEV repairable writeoff (must go ASAP)

Please don't think we are a ravenous pack of EV junkies. .. but Free and EV in the same sentence was sure to motivate!
I hope it goes smoothly and amicably for you ☺
by jonescg
Tue, 10 Apr 2018, 14:41
Forum: For Sale/Wanted
Topic: FS 2011 i-MiEV repairable writeoff (*SOLD*)
Replies: 19
Views: 447

Re: FS 2011 i-MiEV repairable writeoff (must go ASAP)

Who's keen? I want a battery from one!
by jonescg
Sat, 07 Apr 2018, 13:52
Forum: Mitsubishi
Topic: Aftermarket iMiEV battery upgrade project
Replies: 8
Views: 238

Aftermarket iMiEV battery upgrade project

I bought about 800 of these three-hexagon cell holders for 18650 cells. More than enough to put some 4-cell and 8-cell battery packs together as replacements for the iMiEV battery packs. 20180407_134158.jpg This layout gives a 23-parallel arrangement, so if you assume a reliable 3 Ah per cell, that'...