Search found 3637 matches

by Richo
Today, 13:16
Forum: Batteries, charging, management and monitoring
Topic: C-Ion "Battery" Skepticism
Replies: 3
Views: 41

Re: C-Ion "Battery" Skepticism

To be on the game they need to get to 250Wh/kg.
So their 180g "battery" needs 45Wh 162kJ and have a voltage of 14.7V.
:lol:
by Richo
Today, 13:07
Forum: Batteries, charging, management and monitoring
Topic: C-Ion "Battery" Skepticism
Replies: 3
Views: 41

Re: C-Ion "Battery" Skepticism

https://cleantechnica.com/2019/02/01/zapgos-carbon-ion-battery-delivers-ultra-fast-charging-zero-degradation/ So what I read here is the improvement to the breakdown voltage of the capacitor. Most supercaps are around 2.7V where as the current C-Ion is 3.4V. If we use 100Wh/kg which is similar to s...
by Richo
Today, 12:35
Forum: General EV Discussion
Topic: AC 3 phase motor fee spinning
Replies: 5
Views: 58

Re: AC 3 phase motor fee spinning

Whoops - I see the mistake - sorry
divided by 0.82 not multiply :oops:

Total ratio should be more like 4.80:1
4200 RPM would be 874.5RPM at the wheel.
Which comes out to 106kph.

So even having the nominal at 80kph/3169RPM that's 100Vac/142Vdc

What controller was this going on?
Big Mouses?
by Richo
Yesterday, 15:08
Forum: Batteries, charging, management and monitoring
Topic: C-Ion "Battery" Skepticism
Replies: 3
Views: 41

C-Ion "Battery" Skepticism

So there has been a few news reports around about ZapGo's C-Ion "Battery". https://www.businesswire.com/news/home/20190910005668/en/ZapGo%E2%80%99s-Carbon-Ion-Battery-Expected-Charge-Electric-Vehicles https://www.smart-energy.com/industry-sectors/storage/new-battery-technology-to-charge-an-ev-100-ti...
by Richo
Yesterday, 14:38
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 26
Views: 140

Re: To import or to build? New to EV's

4.5kW/9kW seems a bit under powered.
I'd be surprised if you could get to 100kph.
Nice price tho
by Richo
Yesterday, 13:03
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 26
Views: 140

Re: To import or to build? New to EV's

mikedufty wrote:
Mon, 16 Sep 2019, 21:37
Fairly pricey I think... at $12,500.
Me thinks too :lol:

You do a whole conversion less than that.

I'd start with the ME1507 motor.
by Richo
Yesterday, 12:51
Forum: General EV Discussion
Topic: AC 3 phase motor fee spinning
Replies: 5
Views: 58

Re: AC 3 phase motor fee spinning

195/75R14 has c=2.035m 5.857:1 diff 4th is 0.82:1 Total ratio 7.143:1 110kph=30.55m/s 15.01RPS=900.9RPM Motor RPM = 6,435 6,435/1500=4.29xFn Normally you wouldn't set the nominal voltage for 110kph/205Vac/291VDC as the motor will still spin at a higher RPM with less power. 90kph=5265RPM=168Vac=238VD...
by Richo
Mon, 16 Sep 2019, 15:06
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 26
Views: 140

Re: To import or to build? New to EV's

Mikeymcblimey wrote:
Mon, 16 Sep 2019, 14:57
...it seems simple...
Well until money gets involved and time and family...
by Richo
Mon, 16 Sep 2019, 15:05
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 26
Views: 140

Re: To import or to build? New to EV's

Mikeymcblimey wrote:
Mon, 16 Sep 2019, 13:26
Ive come across qsmotors on a few forums and had a look on their site.
I was under the impression QS motors were hub motors - more aimed at scooters.
The prices are on aliexpress.
by Richo
Mon, 16 Sep 2019, 14:50
Forum: General EV Discussion
Topic: AC 3 phase motor fee spinning
Replies: 5
Views: 58

Re: AC 3 phase motor fee spinning

Well induction motor wouldn't have any of those problems.
Permanent magnet would produce a back EMF (AC volts) but if its disconnected would be the same as a power point with nothing plugged into it.
The power is only generated once it is connected to something.
by Richo
Mon, 16 Sep 2019, 14:46
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 26
Views: 140

Re: To import or to build? New to EV's

Sure that'll do it. So the process would be: 1. Decide IF you want to convert or go for a production vehicle 2. If you're converting pick out the type of donor vehicle. 3. Pick out the motor to match the performance you want for the vehicle. 4. Select a controller to run that motor. 5. Select batter...
by Richo
Mon, 16 Sep 2019, 12:53
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 26
Views: 140

Re: To import or to build? New to EV's

I'm not a speedster and much prefer the style of a cafe racer or cruiser to sports bikes I just want to observe that power/performance of ev's is never an issue if we don't define what we mean by that. Well in this case Mikey did sort of indicate the motorbike he was after. A 250cc are in the range...
by Richo
Mon, 16 Sep 2019, 12:46
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 26
Views: 140

Re: To import or to build? New to EV's

You could always look through what other people have done
http://www.evalbum.com/type/MTCY
They will have a list of they main parts they used to convert a motorcycle.

http://www.evalbum.com/4933
by Richo
Mon, 16 Sep 2019, 12:36
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 26
Views: 140

Re: To import or to build? New to EV's

bladecar wrote:
Mon, 16 Sep 2019, 12:05
Just occasionally, I observe a "pushbike" motoring by, with a battery container on it and I think, "that thing seems to almost have the abilities of an electric motorcycle.
Mmmm I've seen those top end electric bicycles.
I followed one at 90kph in an 80 zone :o
All quite illegal.
by Richo
Mon, 16 Sep 2019, 12:33
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 26
Views: 140

Re: To import or to build? New to EV's

petrol bikes don't tend to have much room for batteries, which limits you somewhat I don't think that the hub motors are that great at the moment. So the real issue is trying to fit the batteries AND the motor in the frame. A few weeks back I was looking at the Nighthawk cafe racer 250. They still ...
by Richo
Thu, 12 Sep 2019, 12:54
Forum: Scooters, mopeds and electric toys
Topic: Upgrading 24V mobility scooter from PB to LiFePO4 batts
Replies: 16
Views: 198

Re: Upgrading 24V mobility scooter from PB to LiFePO4 batts

My guess is they just copied the add from a 36V unit and forgot to change one number.
by Richo
Thu, 12 Sep 2019, 12:51
Forum: Scooters, mopeds and electric toys
Topic: Upgrading 24V mobility scooter from PB to LiFePO4 batts
Replies: 16
Views: 198

Re: Upgrading 24V mobility scooter from PB to LiFePO4 batts

brendon_m wrote:
Thu, 12 Sep 2019, 12:47
I'm definitely not vouching for it or its quality.
No I understand - its there for consideration as an option not as a specific "buy this" one.
Realistically I think it is probably the easiest option.
by Richo
Thu, 12 Sep 2019, 12:48
Forum: Scooters, mopeds and electric toys
Topic: Upgrading 24V mobility scooter from PB to LiFePO4 batts
Replies: 16
Views: 198

Re: Upgrading 24V mobility scooter from PB to LiFePO4 batts

Here's a summary:

18650 1.44kg for $300
Bike pack 2.5kg for $295
Headway 2.7kg for $224
LTO-10S 3.7kg for $430
LTO-12S 4.4kg for $515
SLA 16kg for $210
by Richo
Thu, 12 Sep 2019, 12:43
Forum: Scooters, mopeds and electric toys
Topic: Upgrading 24V mobility scooter from PB to LiFePO4 batts
Replies: 16
Views: 198

Re: Upgrading 24V mobility scooter from PB to LiFePO4 batts

Something like this maybe https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com.au%2Fulk%2Fitm%2F323696643887 So they are 18650's... It's title is 24V but the description is 10S5P. 10S would be 36V. Each cell in every battery goes through a strict testing process for capacity, voltage,...
by Richo
Tue, 10 Sep 2019, 12:54
Forum: General EV Discussion
Topic: Toyota Hiace poptop conversion
Replies: 17
Views: 1589

Re: Toyota Hiace poptop conversion

Faron Peckham wrote:
Mon, 09 Sep 2019, 12:00
Regenerative braking could be a game changer on this route. Maintenance costs were really taxing, so going electric seems like it could really change the economics.
So AC it is.

Do you have any typical Specs on your vehicle (kW)?
by Richo
Tue, 10 Sep 2019, 12:51
Forum: General EV Discussion
Topic: Toyota Hiace poptop conversion
Replies: 17
Views: 1589

Re: Toyota Hiace poptop conversion

Faron Peckham wrote:
Mon, 09 Sep 2019, 12:00
I think 100 km of range seems appropriate.
So if you have access to Leaf cells you'd need 40 as a bare minimum.
That's be 20S2P (152 volts) which could be a bit high for some controllers.

If speed is not your thing on these tours then you could go 3P.
15S3P (114 Volts+).

Or 10S4P (76 Volts+).
by Richo
Tue, 10 Sep 2019, 12:38
Forum: General EV Discussion
Topic: Toyota Hiace poptop conversion
Replies: 17
Views: 1589

Re: Toyota Hiace poptop conversion

Faron Peckham wrote:
Mon, 09 Sep 2019, 12:00
more and more salvage EV parts are available each day.
Send them to us in Oz :lol: