Search found 3713 matches

by jonescg
Sat, 02 Jan 2021, 09:59
Forum: Renewable Energy and Storage (Non-EV)
Topic: 12v lithium batteries can't be paralleled?
Replies: 51
Views: 3705

Re: 12v lithium batteries can't be paralleled?

I'm sharing my experience with paralleling large format LiFePO4 cells for the benefit of other readers. How about you?
by jonescg
Fri, 01 Jan 2021, 18:21
Forum: Renewable Energy and Storage (Non-EV)
Topic: 12v lithium batteries can't be paralleled?
Replies: 51
Views: 3705

Re: 12v lithium batteries can't be paralleled?

OK so now I am confused, but I am also a bit tired and I might be missing something. You appear to have taken issue with something that Terry had done, or observed, but I'm not sure what it is now :?
by jonescg
Fri, 01 Jan 2021, 12:50
Forum: Members Machines
Topic: Luke's 2001 NB MX-5
Replies: 46
Views: 2074

Re: Luke's 2001 NB MX-5

Cost is actually slightly less than the original, and substantially higher energy density. The big pluses for the new pack will be the fact all 24 kWh will fit inside the fuel tank space, freeing up the whole boot. Negative is the lack of cooling (could be a positive considering how I got here) and ...
by jonescg
Fri, 01 Jan 2021, 09:12
Forum: Renewable Energy and Storage (Non-EV)
Topic: 12v lithium batteries can't be paralleled?
Replies: 51
Views: 3705

Re: 12v lithium batteries can't be paralleled?

So you're highlighting poor quality cells? 100% that is a massive problem in the DIY market and it's always worth buying known good brands. No amount of good planninf can compensate for junk cells. But that's also a separate matter to building a battery of high capacity and potential, where series a...
by jonescg
Thu, 31 Dec 2020, 10:58
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 698
Views: 78331

Re: Prelude conversion project - some questions

The new location for the BMS will be down the middle, with all of the BMS fly wires hanging downwards in a water-draining kind of way. New BMS placement.jpg Also, I have decided the correct clamping method should involve folded, laser cut sheet metal. This is the most compact and reliable method I t...
by jonescg
Wed, 30 Dec 2020, 22:03
Forum: Members Machines
Topic: Luke's 2001 NB MX-5
Replies: 46
Views: 2074

Re: Luke's 2001 NB MX-5

The original Prelude pack with liquid cooling plates was working well until coolant (mostly water) leaked into one of the modules and the resulting condensation spread throughout the pack, wetting everything completely. So while two modules were damaged, the rest were trouble with a time delay. So f...
by jonescg
Wed, 30 Dec 2020, 14:30
Forum: Renault
Topic: And then there were 5...
Replies: 24
Views: 863

Re: And then there were 5...

So they aren't even trying to fix the problem?!
by jonescg
Wed, 30 Dec 2020, 07:43
Forum: The Lounge
Topic: Selecting the ideal car for conversion
Replies: 7
Views: 220

Re: Selecting the ideal car for conversion

What I'm saying is, don't convert a Camry.
by jonescg
Wed, 30 Dec 2020, 07:42
Forum: The Lounge
Topic: Selecting the ideal car for conversion
Replies: 7
Views: 220

Re: Selecting the ideal car for conversion

Yep, go for something special. Make it fast. Super long range, incredible handling, or even a solar charged EV camper trailer just for something different. Or an electric ute or 4x4 since nobody sells an electric one here yet.
by jonescg
Tue, 29 Dec 2020, 20:26
Forum: Members Machines
Topic: Luke's 2001 NB MX-5
Replies: 46
Views: 2074

Re: Luke's 2001 NB MX-5

Not sure how happy they will be living upside down, but it's an innovative approach! I'm also working on 18650 based battery packs right now and while it might be a bit late, they do have one advantage - completely customisable shapes and sizes. Have a Look at the Prelude thread and see what you thi...
by jonescg
Tue, 29 Dec 2020, 16:08
Forum: Blade EVs
Topic: Unable to repair my Electron V
Replies: 12
Views: 627

Re: Unable to repair my Electron V

Tried Geoff O'Toole in Mulgrave?
by jonescg
Mon, 28 Dec 2020, 16:34
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 698
Views: 78331

Re: Prelude conversion project - some questions

Since everything is on a go-slow I figured I might as well get busy with the other parts of the project I'd forgotten about, or at least would soon discover they were unfinished... The new battery modules will call for new busbars and cable links, so I spent a bit of time planning out the main fuse ...
by jonescg
Mon, 28 Dec 2020, 13:41
Forum: Technical and conversion discussion
Topic: Eaton / Bussmann 200 A fuse holders
Replies: 1
Views: 133

Eaton / Bussmann 200 A fuse holders

After trying to make these things myself I finally found you can buy them.
Bussmann fuse holder.JPG
Bussmann fuse holder.JPG (65.03 KiB) Viewed 133 times
https://au.rs-online.com/web/p/base-mou ... rs/1821571

I found an eBay seller unloading a few so for $188 I get three.
by jonescg
Mon, 28 Dec 2020, 09:20
Forum: Hyundai and Kia
Topic: Ioniq motor replacement
Replies: 11
Views: 470

Re: Ioniq motor replacement

I agree, there's a bearing-like noise there.
Hopefully motor bearing can be replaced and the motor can find its way back on the second hand market - would make a fun conversion powerplant :)
by jonescg
Sun, 27 Dec 2020, 08:09
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 698
Views: 78331

Re: Prelude conversion project - some questions

I've concluded that the best approach is to use a cable gland and run the leads directly to the BMS modules. The battery modules will be potted anyway so it should all be hunky dory internally at least.
by jonescg
Sat, 26 Dec 2020, 19:57
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 698
Views: 78331

Re: Prelude conversion project - some questions

25 pins for the cells and 8 for the thermistors. So minimum of 33 pins.
by jonescg
Sat, 26 Dec 2020, 18:42
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 698
Views: 78331

Re: Prelude conversion project - some questions

Well the nickel plating didn't happen before Christmas, which means nothing will happen until after January 4th. After spending the last two days indoors with the aircon on full blast (and not drawing from the grid - thanks to solar ;) ) today was cool enough to attack the Prelude battery again. I s...
by jonescg
Sat, 26 Dec 2020, 17:55
Forum: Electric motors and controllers
Topic: My Motor Died
Replies: 45
Views: 11584

Re: My Motor Died

Is that a scorched armature winding?
by jonescg
Fri, 25 Dec 2020, 11:18
Forum: Renewable Energy and Storage (Non-EV)
Topic: 12v lithium batteries can't be paralleled?
Replies: 51
Views: 3705

Re: 12v lithium batteries can't be paralleled?

I have experience with both circuit diagrams drawn. The parallel first, then series arrangement is more reliable, in my experience. Of those two diagrams, are you suggesting the upper one is better? By the way, if you open up a large prismatic LFP cell, you will find 3 jelly-rolls wound up and paral...
by jonescg
Fri, 25 Dec 2020, 11:12
Forum: Technical and conversion discussion
Topic: Ultrasonic cleaning bath project...
Replies: 4
Views: 203

Re: Ultrasonic cleaning bath project...

Yeah I did a stack of that snooping, but the tell-tale was the spark once I pressed the On button. It seems strange to me that the two transformers are wired up in series, but maybe that's just part of the circuit. I'm wondering if the neutral-earth arrangements in Australia are not conducive to how...
by jonescg
Thu, 24 Dec 2020, 18:09
Forum: Technical and conversion discussion
Topic: Ultrasonic cleaning bath project...
Replies: 4
Views: 203

Re: Ultrasonic cleaning bath project...

I think that's the same place the bath was bought from. And if the generator is the same, it too might blow up on switch-on.
I guess I'd like to know that the transducers aren't stuffed, and if not, then maybe a more reputable supplier can fit the bill?
by jonescg
Thu, 24 Dec 2020, 12:11
Forum: Technical and conversion discussion
Topic: Ultrasonic cleaning bath project...
Replies: 4
Views: 203

Ultrasonic cleaning bath project...

For lack of a better place to put this thread, I figures starting here might be a good place. Ultrasonic bath.jpg https://www.bjultrasonic.com/shop/power-adjustable-ultrasonic-cleaner-130l/ A friend bought an ultrasonic cleaning bath from China for about $3000 landed. Not knowing what to expect, and...
by jonescg
Thu, 24 Dec 2020, 08:47
Forum: Renewable Energy and Storage (Non-EV)
Topic: 12v lithium batteries can't be paralleled?
Replies: 51
Views: 3705

Re: 12v lithium batteries can't be paralleled?

It depends - when I build LiPo cell packs, the series buslink is a piece of 2 mm thick copper, and it serves as the parallel link too. I have never seen an internal short fail that way. I have seen cells with a small self-discharge bring the entire parallel group down to zero though. Which sucks, bu...
by jonescg
Wed, 23 Dec 2020, 21:34
Forum: Renewable Energy and Storage (Non-EV)
Topic: 12v lithium batteries can't be paralleled?
Replies: 51
Views: 3705

Re: 12v lithium batteries can't be paralleled?

What do you mean by 'lets go'? If it forms an internal short, its voltage will drop and the cells in parallel with it will dump current until the buslink melts. If it goes open circuit the capacity is reduced, the DCIR increases and will result in voltage sag across that one cell group. Parallel fir...