Search found 3302 matches

by Richo
Today, 13:01
Forum: Mitsubishi
Topic: Battery pack prices plummet
Replies: 10
Views: 631

Re: Battery pack prices plummet

rhills wrote:
Yesterday, 19:01
I pointed out that the old battery pack belongs to me.
I've been waiting for this to happen.
The only way this would not be the case is the conditions of accepting the new battery pack.
But true would never hold up in court.
by Richo
Today, 12:50
Forum: Batteries, charging, management and monitoring
Topic: Aluminium Air battery
Replies: 1
Views: 11

Aluminium Air battery

https://phys.org/news/2018-10-catalyst- ... eries.html

1kg of aluminum 700km range.(unsubstantiated)
Use then replace.

Some form of modified flow cell.
by Richo
Fri, 12 Oct 2018, 12:31
Forum: Technical and conversion discussion
Topic: Gear ratios and torque
Replies: 4
Views: 81

Re: Gear ratios and torque

4500RPM -> 547RPM
3.8Nm -> 31.4Nm

I see some buggies get about 35kph, stand up scooters 55kph.
by Richo
Tue, 09 Oct 2018, 13:10
Forum: Members Machines
Topic: Francisco's Electric Pajero
Replies: 28
Views: 576

Re: Francisco's Electric Pajero

Machinist and controller design your like superman :mrgreen:
by Richo
Tue, 09 Oct 2018, 13:07
Forum: Members Machines
Topic: Francisco's Electric Pajero
Replies: 28
Views: 576

Re: Francisco's Electric Pajero

I am unsure of the weight of 60kwh worth of batteries but it will be loosing a lot of weight from the stuff that will come out. Here are some approx weights for 60kWh: LiFePO4 cylindrical 652kg LiFePO4 prismatic 594kg Leaf modules 518kg Tesla modules 268kg Sorry I haven't checked the cost or if all...
by Richo
Tue, 09 Oct 2018, 12:54
Forum: Blade EVs
Topic: Connector for Tritium Driver Controls programming
Replies: 2
Views: 144

Re: Connector for Tritium Driver Controls programming

Yeah the link went off somewhere random.
https://au.element14.com/amphenol-fci/h ... p/1835837?

So for the average punter is there a chance of bricking the unit or will it always be recoverable?
by Richo
Fri, 05 Oct 2018, 12:30
Forum: Members Machines
Topic: Francisco's Electric Pajero
Replies: 28
Views: 576

Re: Francisco's Electric Pajero

Even a decent sized pack of 20kWh prismatic lithium cells with 10C peak will be 200kW. More than this I'd think you'd go over the GVM. So I'm guessing current limiting will be the flavour of the day. Other than using LTO's where you trade range for power. Still it'd be an awesome view pulling 600kW ...
by Richo
Fri, 05 Oct 2018, 12:19
Forum: Renewable Energy and Storage (Non-EV)
Topic: Charging 2x12V batteries connected in series
Replies: 5
Views: 203

Re: Charging 2x12V batteries connected in series

What is the power rating of the inverter or what is the average load power connected to the battery?
by Richo
Thu, 04 Oct 2018, 12:55
Forum: Members Machines
Topic: Francisco's Electric Pajero
Replies: 28
Views: 576

Re: Francisco's Electric Pajero

Just a quick Check.
Leaf cells would be like 80kWh so not realistic.

SCiB LTO 12kWh pack with ~45km range would be about AUD$35,000 could get you 700kW.
by Richo
Thu, 04 Oct 2018, 12:49
Forum: Members Machines
Topic: Francisco's Electric Pajero
Replies: 28
Views: 576

Re: Francisco's Electric Pajero

francisco.shi wrote:
Thu, 27 Sep 2018, 14:41
After the measurements on the motor I worked out that I can get 300kw (maybe more) peak and about 150kw continuous per motor.
So the total peak power will be around 600kw.
And where will the 600kW (700kW after losses) come from?
by Richo
Tue, 02 Oct 2018, 12:55
Forum: Tesla EVs
Topic: Elon stands down
Replies: 2
Views: 202

Re: Elon stands down

But I thought the problem was he got sick of ppl complaining about it not making any money.
Why would he buy more shares in something that isn't making money?
by Richo
Tue, 02 Oct 2018, 12:52
Forum: Batteries, charging, management and monitoring
Topic: Pulse charging Lithiums
Replies: 5
Views: 211

Re: Pulse charging Lithiums

Bridge Rectified mains is 100Hz - 10ms -> 21J.

So mostly these days its a PFC then flyback SMPS.
60kHz -> 16uS -> 0.035J
All the components become much smaller.
by Richo
Thu, 27 Sep 2018, 12:48
Forum: Batteries, charging, management and monitoring
Topic: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Replies: 362
Views: 26538

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

Understandably a complete system balancer is cheaper than a per-cell module. I can't stand all the wires personally. I'll only have a per-cell BMS in my ev - no wires. Costs a bit more but no chance of a wiring issue. The black bootlaces are 1.5mm. So 10-15A wire max. 18 wires in a bundle. Sounds de...
by Richo
Thu, 27 Sep 2018, 12:29
Forum: Tesla EVs
Topic: Tesla Killer - White Polo TSi - Perth
Replies: 4
Views: 284

Re: Tesla Killer - White Polo TSi - Perth

I'm starting to suspect a conspiracy here.
They're out to get you.

At least the Tango will be skinny enough to miss the crazies.
by Richo
Wed, 26 Sep 2018, 12:52
Forum: Batteries, charging, management and monitoring
Topic: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Replies: 362
Views: 26538

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

So the balance wires from each block of parallel "cap" is cable tied to it neighbour and runs off to the balance board. Should ANY joint fail and short out anywhere - BOOM. Not to mention the extra heat from bundling all the wires together would have to be de-rated to be safe. Should the middle wire...
by Richo
Wed, 26 Sep 2018, 12:39
Forum: Batteries, charging, management and monitoring
Topic: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Replies: 362
Views: 26538

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

The unit was supposed to be fully discharged, having run a water heater overnight. Measuring across the terminals, we found about 30V. In a "capacitor" system not all of the stored energy can actually be used. So at some point a DC/DC that keeps the output useable will shut down even though there i...
by Richo
Tue, 25 Sep 2018, 13:14
Forum: Electric motors and controllers
Topic: Which Motor?
Replies: 16
Views: 1070

Re: Which Motor?

Well that is impressive.
That kind of performance is like a $10k motor...
by Richo
Tue, 25 Sep 2018, 13:08
Forum: Batteries, charging, management and monitoring
Topic: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Replies: 362
Views: 26538

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

Do I hear an echo, echo, echo.... from what I understand Arvio are either in on the scam or have been duped by it - probably the latter. Its just unfortunate that if a claim against this product is made in Australia it will be the importer, Arvio, that will suffer. And given this has been part funde...
by Richo
Tue, 25 Sep 2018, 12:50
Forum: Batteries, charging, management and monitoring
Topic: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Replies: 362
Views: 26538

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

Two problems here: 1. Supercapacitors do not explode or burn during over-charge 2. Where are the protection circuits? 1. Can't say I've tried over-charging given that generic supercaps costs are high. I would have thought they explode in a ball of fire like any other cap. More-so since they have an...
by Richo
Thu, 20 Sep 2018, 08:08
Forum: Electric motors and controllers
Topic: Which Motor?
Replies: 16
Views: 1070

Re: Which Motor?

The car in question only had 34kW.
200V / 75kW would be plenty - no rewind and no gearbox.

How much does the motor weigh?
by Richo
Thu, 20 Sep 2018, 08:05
Forum: Parts & Suppliers
Topic: Suzi Auto Services
Replies: 9
Views: 1771

Re: Suzi Auto Services

I have been told they are 3C.
by Richo
Tue, 18 Sep 2018, 13:01
Forum: Members Machines
Topic: jonescg's eCRX build thread
Replies: 41
Views: 6855

Re: jonescg's eCRX build thread

jonescg wrote:
Fri, 14 Sep 2018, 14:29
I have decided that a Leaf motor and differential is probably the best option for the CRX.
Wow I haven't seen one of these yet to buy.
That's how I ended up with the Hyundai motor.

Any clues how much the leaf motor+transmission costs?
by Richo
Tue, 18 Sep 2018, 12:37
Forum: Electric motors and controllers
Topic: Which Motor?
Replies: 16
Views: 1070

Re: Which Motor?

francisco.shi wrote:
Mon, 17 Sep 2018, 16:42
The motors I have will do 260Nm at 5500 rpm from a 400v battery.
Well that would be enough for direct drive in this case - hills included.
400V maybe too high though for direct drive on something that only had 70kW.
200-300V would be ok.
by Richo
Tue, 18 Sep 2018, 12:26
Forum: Electric motors and controllers
Topic: Which Motor?
Replies: 16
Views: 1070

Re: Which Motor?

francisco.shi wrote:
Mon, 17 Sep 2018, 17:04
For example on the right it says torque and power so not sure if 30 means 30kw or 30Nm.
Ah its both.
Only the colour of the line makes the distinction between kW and Nm.