Search found 3312 matches

by jonescg
Jan 20, 2018 8:46 am
Forum: Battery Technology
Topic: Solder longevity on nickel
Replies: 4
Views: 48

Re: Solder longevity on nickel

Looks like your iron is not hot enough. I'd invest in a decent 80 W iron for that job.
by jonescg
Jan 18, 2018 11:01 pm
Forum: Electric Watercraft
Topic: Safety & charging in the water?
Replies: 2
Views: 65

Re: Safety & charging in the water?

I believe UL1426 covers electrical wiring for boats, and there are safety / protection devices listed in there as well. It's critical that all copper wiring be tinned for corrosion resistance. In the case of heavy duty cables, this might be difficult however you can seal the ends really well to mini...
by jonescg
Jan 18, 2018 12:04 am
Forum: Resources & EV Related Parts and Services
Topic: 18650 Supplier for AUSTRALIA
Replies: 7
Views: 61

Re: 18650 Supplier for AUSTRALIA

Nah, I'm getting the cells out of China from my usual supplier so you'd have to order the kit yourself. Happy to tack the cells onto the order for you regardless.
by jonescg
Jan 17, 2018 11:26 pm
Forum: Resources & EV Related Parts and Services
Topic: 18650 Supplier for AUSTRALIA
Replies: 7
Views: 61

Re: 18650 Supplier for AUSTRALIA

Hi Mate, In Perth too and might be interested in a vruzend kit and some cells if you're building an order up - was initially thinking 30q's. Q's - What are you ordering? And do you know the max C for a 35e vs a 30q? This is for a spare bike with a 36v BBS02 so it's only a small pack I need e.g. 10s...
by jonescg
Jan 17, 2018 7:42 pm
Forum: Resources & EV Related Parts and Services
Topic: 18650 Supplier for AUSTRALIA
Replies: 7
Views: 61

Re: 18650 Supplier for AUSTRALIA

I'm about to do an order for 18650 cells - they work out to about AU$6.50 landed, depending on customs etc.
by jonescg
Jan 16, 2018 10:24 pm
Forum: E-Bike General Discussion
Topic: Potential Catastrophic Frame Failer Averted ….sort of.
Replies: 91
Views: 1138

Re: Potential Catastrophic Frame Failer Averted ….sort of.

If you want an option that really works, after acetone cleaning and sanding, wrapping a few rolls of urathane casting tape tightly around that head tube assembly in a lashing style of pattern can make a permanent solution, and is possible to assemble a strong frame from scratch that way using no we...
by jonescg
Jan 16, 2018 8:25 am
Forum: Items for Sale - New
Topic: Phi-Power motors (Australian EOI)
Replies: 14
Views: 719

Re: Phi-Power motors (Australian EOI)

Frank wrote:
Jan 16, 2018 8:05 am
(Sorry if you've already posted and I missed it.)
Not explicitly, but it can be found by scrolling down the page a few centimetres:
http://www.phi-power.com/en/phi-power-motor-series/

:D
by jonescg
Jan 15, 2018 9:49 pm
Forum: Items for Sale - New
Topic: Phi-Power motors (Australian EOI)
Replies: 14
Views: 719

Re: Phi-Power motors (Australian EOI)

If I were to put a bike together for the Isle of Man, I would seriously consider the Phi271. 20 kg lighter, still a goodly amount of power, and more room / mass for battery.

But for another electric superbike I'll go for the PhE381. Because the power is pretty nice 8)
by jonescg
Jan 15, 2018 12:38 am
Forum: Battery Technology
Topic: Cool student project!
Replies: 18
Views: 505

Re: Cool student project!

Sorry for the long post, hope that filled in some of the gaps! Thanks so much for the insight! The fusing is an interesting point - a cell failure resulting in the neighbouring parallel cells dumping current will heat up the fusible link, but as you point out, there's a chance it might set fire to ...
by jonescg
Jan 14, 2018 9:43 pm
Forum: Battery Technology
Topic: Vibration is killing your cells!
Replies: 8
Views: 475

Re: Vibration is killing your cells!

I'd say the vibration in a car battery is far lower than say, an e-bike on a trail, but it's interesting to see that Jaguar are pursuing a battery where the cylindrical cells lay on their sides. Perhaps their findings in this paper (one of the authors is from JLR) drove that decision?
by jonescg
Jan 12, 2018 11:47 pm
Forum: Battery Technology
Topic: The "thermal management of LiPo" thread!
Replies: 69
Views: 3838

Re: The "thermal management of LiPo" thread!

Not sure if this video has been shared before or not, but I though it was a good example of how Kokam packs are built, and cooled.
by jonescg
Jan 12, 2018 8:34 pm
Forum: Battery Technology
Topic: Vibration is killing your cells!
Replies: 8
Views: 475

Re: Vibration is killing your cells!

Well for cylindrical cells, X and Y are identical - and it's fairly snug in that dimension. But the Z has the mass of the jelly-roll moving about a central mandrel. There is nothing holding the roll together other than tension, so I can see how the active layers could start to wear down. I think mos...
by jonescg
Jan 12, 2018 8:29 pm
Forum: Battery Technology
Topic: Cool student project!
Replies: 18
Views: 505

Re: Cool student project!

Thanks for the background guys! Yeah Tesla has 32 temperature sensors (two per module) and they keep an eye on the coolant temperature in and out. System voltages are largely determined by the motor/inverter choice, and most of these are in the 400-700 V DC range. Voltron Evo runs a 700 V max batter...
by jonescg
Jan 12, 2018 7:16 am
Forum: Battery Technology
Topic: Cool student project!
Replies: 18
Views: 505

Re: Cool student project!

That's epic. So much data! No wonder they go for low voltage battery packs :lol:
by jonescg
Jan 11, 2018 8:48 pm
Forum: Battery Technology
Topic: Cool student project!
Replies: 18
Views: 505

Re: Cool student project!

fechter wrote:
Jan 11, 2018 10:51 am
Wow, that's a crapload of wires coming out of the battery. Seems like way more than you would need for 22s. Hope all of them get hooked up to the right spot. :shock:

Nice pack design otherwise.
Yes I noticed that - balance wires would explain ~23 of them, but the rest of them - :?
by jonescg
Jan 10, 2018 9:19 pm
Forum: Battery Technology
Topic: Cool student project!
Replies: 18
Views: 505

Re: Cool student project!

^^ Me too - I really like this approach. Very compact and the cooling, although perhaps not as good as a radial approach, will still work quite effectively.

Might write to them and see how they got on.
by jonescg
Jan 10, 2018 9:15 pm
Forum: Battery Technology
Topic: Vibration is killing your cells!
Replies: 8
Views: 475

Vibration is killing your cells!

Well its obvious that physical trauma is a bad thing, but this paper describes how the authors took 18650 cells and shook the shit out of them for 100 hours and measured capacity and IR. Holy crap! Double, even quadruple the internal resistance! Capacity was down, but not a long way. Z, Y and Z axis...
by jonescg
Jan 10, 2018 7:25 am
Forum: Polls & Surveys
Topic: Would you put solar panel on your electric vehicle
Replies: 30
Views: 675

Re: Would you put solar panel on your electric vehicle

Only reason I'd put a solar panel on the roof of an electric car is to top up the auxiliary battery, which can supplement a small fan keeping the battery cool or something. Otherwise it's rarely worth it.
by jonescg
Jan 09, 2018 11:39 pm
Forum: Large EV General Discussion
Topic: Aussie EV Autocross Special
Replies: 309
Views: 16265

Re: Aussie EV Autocross Special

Looks sick! What components are you looking to use?
by jonescg
Jan 08, 2018 11:40 pm
Forum: Battery Technology
Topic: Cool student project!
Replies: 18
Views: 505

Cool student project!

by jonescg
Jan 08, 2018 8:31 pm
Forum: Alternative Energy
Topic: Do Tesla Powerpacks use a 'Negative DC" bus?
Replies: 4
Views: 154

Re: Do Tesla Powerpacks use a 'Negative DC" bus?

I would have thought that ~600 V DC would be closer to the mark. When turned into 3-phase AC it's more like 415 V phase to phase.
by jonescg
Jan 08, 2018 6:13 pm
Forum: Alternative Energy
Topic: Do Tesla Powerpacks use a 'Negative DC" bus?
Replies: 4
Views: 154

Re: Do Tesla Powerpacks use a 'Negative DC" bus?

Right. So the DCDCs step it up from 48 V to 400V DC, and this is inverted centrally. Kind of neat.
by jonescg
Jan 08, 2018 3:55 am
Forum: Alternative Energy
Topic: Do Tesla Powerpacks use a 'Negative DC" bus?
Replies: 4
Views: 154

Do Tesla Powerpacks use a 'Negative DC" bus?

I came across this patent from Tesla, as discussed by Electrek: https://electrek.co/2017/03/31/tesla-paten-powerpack-energy-storage-station/ There is a link to the patent document, but only downloadable through Scribid (another means to make a buck out of the internet). Anyway, what caught my attent...
by jonescg
Jan 08, 2018 2:05 am
Forum: General Discussion
Topic: Forum software upgrade on 11/17/2017 technical issues thread
Replies: 131
Views: 5638

Re: Forum software upgrade on 11/17/2017 technical issues thread

Yeah I get this:
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Capture.JPG (25.49 KiB) Viewed 128 times
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