Search found 3679 matches

by Richo
Fri, 30 Aug 2019, 13:00
Forum: Batteries, charging, management and monitoring
Topic: HELP PLEASE I think I killed my cells
Replies: 27
Views: 805

Re: HELP PLEASE I think I killed myself

HLG-80H-C700A ~$60 5V 1A plugpack with an LM317 and 2.4 Ohm 5W series resistor. $10 in parts and $100 stuffing around. Rectify mains, filter and 510R 150W resistor. That'd cost ~$50. ... this "theoretical circuit" would kill any user I'll update the cost... Rectify mains, filter and 510R 150W resis...
by Richo
Fri, 30 Aug 2019, 12:52
Forum: General EV Discussion
Topic: How to tell a kilowatt hour from a kelvin week henry
Replies: 25
Views: 867

Re: How to tell a kilowatt hour from a kelvin week henry

It means the inverters were rated to deliver 100 MW of power, but for how long? Correct. In the good 'ol days the assumption was that it would be continuous-forever like all other power stations. So the only consideration IS power not capacity. Like some engineers they live in a box isolated from t...
by Richo
Fri, 30 Aug 2019, 12:44
Forum: General EV Discussion
Topic: How to tell a kilowatt hour from a kelvin week henry
Replies: 25
Views: 867

Re: How to tell a kilowatt hour from a kelvin week henry

I regularly see Mm rather than mm - Umm that's a BIG difference people

OR the other I hate is Mega-milli candella.
Compounded prefixes.
:roll:
by Richo
Wed, 28 Aug 2019, 12:39
Forum: Batteries, charging, management and monitoring
Topic: HELP PLEASE I think I killed my cells
Replies: 27
Views: 805

Re: HELP PLEASE I think I killed my cells

antiscab wrote:
Wed, 28 Aug 2019, 12:32
I would have thought even 10Ah would be enough to change over (20 hrs or so). likely even less
True.
If the last 5% is on the slippery slope of the discharge curve that's about 8Ah.
I'd still leave it longer in this case.
by Richo
Wed, 28 Aug 2019, 12:34
Forum: Batteries, charging, management and monitoring
Topic: HELP PLEASE I think I killed my cells
Replies: 27
Views: 805

Re: HELP PLEASE I think I killed my cells

WARNING - DON'T DO THE FOLLOWING:
:o

Rectify mains, filter and 510R 150W resistor.
That'd cost ~$50.

Just covering all the options :lol:
by Richo
Wed, 28 Aug 2019, 12:25
Forum: Batteries, charging, management and monitoring
Topic: HELP PLEASE I think I killed my cells
Replies: 27
Views: 805

Re: HELP PLEASE I think I killed my cells

At 0.5A charging the whole pack at once is still going to take ~10 days before you can swap over to the normal charger.
by Richo
Tue, 27 Aug 2019, 13:04
Forum: Batteries, charging, management and monitoring
Topic: HELP PLEASE I think I killed my cells
Replies: 27
Views: 805

Re: HELP PLEASE I think I killed my cells

A meanwell power supply HLG-80H-C700A should do it. 64-129V out 0.42-0.70A out ~$60 It will charge at 0.5A up to a point where your regular charger can take over. You have to makes sure you pack is above the 64V minimum. https://www.meanwell.com/productPdf.aspx?i=283#1 The other option is to get a 5...
by Richo
Mon, 26 Aug 2019, 12:33
Forum: Nissan Leaf
Topic: Home charging
Replies: 24
Views: 740

Re: Home charging

brendon_m wrote:
Mon, 26 Aug 2019, 11:34
... measure charge rate is km per hour
kph
Classic :lol:

I agree km/hr makes sense.

Still the funny looks I'd get if I said I charge at 15kph.
by Richo
Thu, 22 Aug 2019, 12:18
Forum: Batteries, charging, management and monitoring
Topic: Battery cooling academic paper
Replies: 6
Views: 275

Re: Battery cooling academic paper

My concern is where is the "cooling" coming from.
45 Degrees in the shade.
55 Degrees in the sun.
Just blowing hot air around has its limits.
by Richo
Wed, 21 Aug 2019, 12:42
Forum: For Sale/Wanted
Topic: 20 x Leaf Cells
Replies: 25
Views: 1202

Re: 20 x Leaf Cells

Still populating.
I'm still aiming to starting testing the cells sometime next week.
by Richo
Wed, 21 Aug 2019, 12:37
Forum: Members Machines
Topic: Soyachips’ Electric FZR250
Replies: 65
Views: 2178

Re: Soyachips’ Electric FZR250

https://www.aliexpress.com/item/30pcs-20000-Cycles-2-3v-30ah-35ah-40ah-66160-LTO-2-4v-Lithium-Titanium-Oxide-Battery/32979869826.html The link I provided indicated 6C/15C by the seller. So the data soyachips used was based on that. I understand that this is your experience but is there any actual t...
by Richo
Mon, 19 Aug 2019, 13:10
Forum: Batteries, charging, management and monitoring
Topic: Battery cooling academic paper
Replies: 6
Views: 275

Re: Battery cooling academic paper

In most cases this isn't an issue. Only for hybrids pushing tiny battery packs to their limits. Heat pipes and PCM all sound quite expensive. I'd want to see a comparison over traditional cooling spreader plates or thin water cooled plates. https://www.ekwb.com/shop/media/wysiwyg/EK-FC1080_GTX_Ti_NP...
by Richo
Mon, 19 Aug 2019, 12:49
Forum: For Sale/Wanted
Topic: 20 x Leaf Cells
Replies: 25
Views: 1202

Re: 20 x Leaf Cells

So currently I am building a constant power load to test all the cells I have. That way I can get all the cell capacities so people will know what they are buying. Probably best to wait a bit until I have tested all the cells. I have finished making the bare PCB and in the process of loading the com...
by Richo
Fri, 16 Aug 2019, 12:53
Forum: For Sale/Wanted
Topic: ebay Tesla modules WA
Replies: 4
Views: 274

Re: ebay Tesla modules WA

Thats nuts :geek:
105kWh

Still I'd reckon the Handi could fit them all. :lol:
Shame - I'm committed to using the Leaf cells.
by Richo
Thu, 15 Aug 2019, 12:33
Forum: Renewable Energy and Storage (Non-EV)
Topic: Heat pump hot water systems
Replies: 21
Views: 608

Re: Heat pump hot water systems

.. the breaker tripping and refusing to reset. I turned the HWS off at the isolator and still couldn't reset the RCBO. You'd think if the isolator isolated the HWS the RCBO should be happy. Did the sparky check the isolator? I have a gas HWS that is due for replacement. I have a giant ducted revers...
by Richo
Thu, 15 Aug 2019, 11:17
Forum: For Sale/Wanted
Topic: ebay Tesla modules WA
Replies: 4
Views: 274

ebay Tesla modules WA

On e-bay (not me)

Tesla Battery Module 24v 444 18650 Cells 5.3kw
$1900ea

7 modules avail.
ebay number: 173969558764

location Baldivis, WA.
by Richo
Tue, 13 Aug 2019, 12:53
Forum: Batteries, charging, management and monitoring
Topic: Battery cooling academic paper
Replies: 6
Views: 275

Re: Battery cooling academic paper

Aggressive cycling of cylindrical cells in Hybrids. Then using heat pipes to cool them. First world problems... Jaguar land rover supplied the cells. Collaborated with Thermacore https://www.boydcorp.com/thermal/two-phase-cooling.html It looks like they were pretty thorough. But I question why they ...
by Richo
Mon, 12 Aug 2019, 12:47
Forum: Technical and conversion discussion
Topic: Starting to research vintage Mazda conversion. Help appreciated.
Replies: 21
Views: 568

Re: Starting to research vintage Mazda conversion. Help appreciated.

HuffnPuff wrote:
Fri, 09 Aug 2019, 21:12
..is AC not a better system because it is easier to get regen happening, Of course along with a premium price?
DC motor + controller $4,300
AC motor + controller $6,600

AC is superior in pretty much every way except price...
by Richo
Mon, 12 Aug 2019, 12:28
Forum: For Sale/Wanted
Topic: 20 x Leaf Cells
Replies: 25
Views: 1202

Re: 20 x Leaf Cells

I still have them.
I am working on a constant power load to make cycle testing easier.
Once that is done I should know the capacity of each of the cells.
by Richo
Wed, 07 Aug 2019, 13:16
Forum: EV Motoring
Topic: Lightyear One
Replies: 5
Views: 249

Re: Lightyear One

Ha ha light year one took down thier photo's...

Here's another
Image
by Richo
Wed, 07 Aug 2019, 13:14
Forum: EV Motoring
Topic: Lightyear One
Replies: 5
Views: 249

Re: Lightyear One

And now Hyundai has one... https://www.motoring.com.au/2020-hyundai-sonata-hybrid-breaks-cover-119635/ 1300km extra per year. 3.5km/day. Really that's only a 150W panel :?: Ooooh thats like a saving of $0.16c per day. $57 a year. $460 over 8 years. Almost pays for itself :o https://motoring.pxcrush....
by Richo
Wed, 07 Aug 2019, 13:01
Forum: General EV Discussion
Topic: VF2 SSV Redline - Hybrid EV conversion?
Replies: 9
Views: 410

Re: VF2 SSV Redline - Hybrid EV conversion?

Ok I'll ask - what is it?
by Richo
Tue, 06 Aug 2019, 12:58
Forum: Technical and conversion discussion
Topic: Starting to research vintage Mazda conversion. Help appreciated.
Replies: 21
Views: 568

Re: Starting to research vintage Mazda conversion. Help appreciated.

I’m wondering about motors and range etc, but haven’t done any calcs yet. http://www.evmotors.com.au/products/appguide.html https://www.evworks.com.au/netgain-impulse-9-series-dc-motor-suitable-for-veh https://www.evworks.com.au/zeva-mc600sp-mc600sp-motor-controller Pack size ~190Wh/km (including 8...
by Richo
Tue, 06 Aug 2019, 12:42
Forum: General EV Discussion
Topic: VF2 SSV Redline - Hybrid EV conversion?
Replies: 9
Views: 410

Re: VF2 SSV Redline - Hybrid EV conversion?

The technology is basically there but no demand means it doesn't exist for aftermarket converters. If you think of something like a Yasa-750 is almost there as a hub motor. Two in the front means an extra 200kW+. But I'd think that would be $50k+ just for the motors and controllers. 5-10kWh of LTO b...
by Richo
Mon, 05 Aug 2019, 12:58
Forum: Technical and conversion discussion
Topic: Starting to research vintage Mazda conversion. Help appreciated.
Replies: 21
Views: 568

Re: Starting to research vintage Mazda conversion. Help appreciated.

jonescg wrote:
Mon, 05 Aug 2019, 12:42
single speed reduction (total reduction of 1:7 or thereabouts).
Normal diffs are like 3.8-4.1 : 1.
Where does the rest of the reduction come from?

Hopefully not the 50 year old box that only did 115Nm when new.