Ckas gn250

Post up a thread for your EV. Progress pics, description and assorted alliteration
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ckas
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Ckas gn250

Post by ckas » Tue, 25 Jan 2011, 02:29

Nearly up to the 1000 km milestone. The stats are in

20.5km per kwh
85 km range (70% depth of discharge)
15km reserve (to 80% DoD)
max speed (so far as I've been able to test) 110km/h
Cost to recharge 15 cents/km
Money saved on fuel in 1000km 36.4 AUD
Carbon emissions avoided on fuel in 1000km (assuming the electricity comes from collie coal power station). 34kg CO2

Overall its been awe inspiring to drive. Acceleration is a little slow over 90km/h but otherwise out performs any expectations I had of it.

Apologies I could not find my original post so it has been restarted.

Frame: Suzuki GN250
Motor: Perm 132
Batteries: 20 thundersky 90ah
Gears: 25 at the front 90 at the back. No gear changing.

Thanks muchly to EVshop in perth for advice and welding.

Videos of first test runs
http://cas.gwoink.com/ebike02102009.mpg
http://cas.gwoink.com/ebike102102009.mpg

Richo
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Ckas gn250

Post by Richo » Tue, 25 Jan 2011, 20:40

Original Post

Well done Image

Will it get a showing at some AEVA event this year?
Help prevent road rage - get outta my way! Blasphemy is a swear word. Magnetic North is a south Pole.

ckas
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Ckas gn250

Post by ckas » Tue, 25 Jan 2011, 21:56

It will definitely be at the sun fair, plus any of the waeva meetings I can make.

Chris

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Ckas gn250

Post by GRMarks » Wed, 26 Jan 2011, 04:48

Are you sure its 15 cents/km to recharge ?
if you get 20.5 km /kwh I pay 18 cents for a kwh. thats 18 / 20.5 = 0.87 cents km.
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Glenn Marks

ckas
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Ckas gn250

Post by ckas » Sat, 29 Jan 2011, 00:57

Sorry
1.5 cents/km

damn them sneaky decimal places.

Our power is 20.9c/kwh plus about 4.5c/kwh for natural power. Add a little inefficiency in the charging system and that makes up the extra.

Cas

GRMarks
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Ckas gn250

Post by GRMarks » Sat, 29 Jan 2011, 14:40

just imagine in the future (at todays prices) melbourne to sydney (1000km) $15
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Glenn Marks

ckas
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Ckas gn250

Post by ckas » Mon, 31 Jan 2011, 22:08

Already planning my trip from perth to albany on this bike. Should be about 7.50 aud :)

ckas

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Thalass
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Ckas gn250

Post by Thalass » Mon, 21 Feb 2011, 18:56

This is awesome! Brilliant. Is that headlight stock? I saw in 4wd action magazine the other day an advertisement for LED spotlights about that size and shape. Two pencil beam and two wide beam LEDs in a square housing about the same as that. Dunno if that'd save you much power, though.

Nice bike!
I'll drive an electric vehicle one day.

ckas
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Ckas gn250

Post by ckas » Tue, 24 May 2011, 17:23

Interesting experiment that may have failed. The thundersky 90's that I put horizontally in the front box seem to have failed in some regard.

One cell has a terminal that is definitely warping.

Another cell is shorting to the bike frame even when unconnected (I am assuming that the cell must have split somewhere where I cannot see it).

Both seem electrically ok and Im not sure how much the orientation affected the failures but its something to keep in mind when battery placing.

Richo
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Ckas gn250

Post by Richo » Tue, 24 May 2011, 20:43

Do you think that the problems you had earlier might have been the warning sign of the batteries failing?
Help prevent road rage - get outta my way! Blasphemy is a swear word. Magnetic North is a south Pole.

ckas
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Ckas gn250

Post by ckas » Mon, 30 May 2011, 22:31

Im not sure what problems you are referring to exactly (ponders post threads for a second).

I have had some degradation of acceleration over time. Largely this has been fixed by cleaning the connections.

This fault was discovered while I was taking it apart to clean each individual battery terminal (wasnt done thoroughly at creation). At this point I discovered the short.

Richo
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Ckas gn250

Post by Richo » Tue, 31 May 2011, 06:24

Ah ok so not the same issue.
Sorry it may not have been in a post - was probably at a meeting.

I'm suprised that there is a cell that has conductivity to the frame when not connected.
Have you had a chance to pull it out for a look?
Help prevent road rage - get outta my way! Blasphemy is a swear word. Magnetic North is a south Pole.

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Ckas gn250

Post by ckas » Thu, 02 Jun 2011, 20:36

Just last night. Fairly good news actually. Some of the dust that's accreted on the terminal tops was conductive, cleaned it off and all was well. The battery case was fine. Time to redo some of the battery box seal tape methinks.

The other cell that had warped slightly was due to slight pressure from the cable coming in from the other box. Not as bad as it looked.

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