Stand-up escooter, ze Meduza project

Lightweight / Folding / Portable EVs - seats optional
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agniusm
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Re: Stand-up escooter, ze Meduza project

Post by agniusm » Feb 01, 2012 2:58 am

Hi, need some help with connecting all the components. Basicaly regarding battery cut off switch and circuit breaker. Where is the best place on the circuit to place battery cut off switch, see the BMS picture, i think before it goes to BMS and controler and circuit breaker between controller and battery?
Thanx
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agniusm
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Re: Stand-up escooter, ze Meduza project

Post by agniusm » Feb 01, 2012 8:38 am

Here are some parts i have aquired:
12V 6A DC-DC
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Charger:
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Got some screws for building pouch cell pack, for the brass block:
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Re: Stand-up escooter, ze Meduza project

Post by agniusm » Feb 04, 2012 5:38 am

OK, got some time to work on battery pack. Starting to take shape, all the ideas turned out to be ok.
Using 6x6 @45mm brass blocks, half threaded 3M half drilled 3.5mm and countersunk 1mm deep. Bolts - 3mm DIN7991 Stainless Steel Alen head:
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Re: Stand-up escooter, ze Meduza project

Post by agniusm » Feb 15, 2012 10:40 am

Have rearranged battery for better BMS access if things go tits up:
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Winter pleasures:



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Re: Stand-up escooter, ze Meduza project

Post by agniusm » Feb 21, 2012 6:10 pm

Some updates:

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Having issues with my BMS/charger. Here is my post from other thread:
Hi, found this thread by accident, thought will post here about my issue with this BMS and somebody might have a solution for me. I have all hooked up and it looks like BMS isnt working. When i connect + to BMS, charger kicks in for few seconds and goes out and after about 10 seconds dose same and stays off. When i hold + wire to bms between my hands (being bms in one hand, battery in the other) it starts working ok. It is some kind of mystery.
I am using it on a123 20Ah cells in 12s configuration with 5a charger. All cells range from 3.3 to 3.36 volts. Any input would be welcome.
Here are


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agniusm
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Re: Stand-up escooter, ze Meduza project

Post by agniusm » Mar 05, 2012 3:42 pm

Bought some LED lights. Will be using domestic 5W Edison bulbs, MR16.

10 degree for high beam:

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38 degree for low beam

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Heres how they look:

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They fit near perfect in to those lights, just neet to cut out round perspex piece in front of the LED


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Re: Stand-up escooter, ze Meduza project

Post by Brentis » Mar 06, 2012 10:50 am

agniusm wrote:Have rearranged battery for better BMS access if things go tits up:
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...
Following this thread,
I feel inspired to build my own pack now. :wink:

Keep up the great work.


:mrgreen:

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Re: Stand-up escooter, ze Meduza project

Post by agniusm » Mar 06, 2012 5:31 pm

Thanx mate. Yea, spring is coming, need to finish it soon. The bike is gone to the painters, waiting or the spokes to arrive from TW, will need to lace two wheels, will be first time:)

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agniusm
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Re: Stand-up escooter, ze Meduza project

Post by agniusm » Mar 26, 2012 12:55 am

Got some work done. Still need to get the wheels trued.
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Re: Stand-up escooter, ze Meduza project

Post by agniusm » Apr 02, 2012 2:27 am

So looking like the project is coming to an end. Couple minor things to do. Have ordered this voltmeter of ebay:
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Still need to make aluminium lid and a hatch for charging cable compartment, fit the voltmeter and front fender. Here are some photos:
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Re: Stand-up escooter, ze Meduza project

Post by Uvedovle » Apr 02, 2012 7:13 am

Great!

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Re: Stand-up escooter, ze Meduza project

Post by agniusm » Apr 03, 2012 11:38 am

Some more update:

Made covers:
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DC-DC regulator and lights wire web :)
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Bought old horn, rely funny sound but it fits:
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Fitted horn :
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To be continued.. ;)

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Re: Stand-up escooter, ze Meduza project

Post by Astropower » Apr 04, 2012 6:31 am

Very Clean and professional,

tell me please, how much weight all this scooter ?

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Re: Stand-up escooter, ze Meduza project

Post by agniusm » Apr 04, 2012 8:58 am

Thanx, i think it should be in 20-30 kg range, have not weighted yet :)

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Re: Stand-up escooter, ze Meduza project

Post by agniusm » Apr 04, 2012 4:00 pm

Some final bits to finish:
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Logo:
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First coat for bottom + anti slip paint top
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Before:
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After
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Re: Stand-up escooter, ze Meduza project

Post by agniusm » Apr 08, 2012 9:40 am

Have done a test run. 100% throttle full time, 5W+ 1.5W LED always on. Top speed 32kmh, distance 33.67km. Here is Google KML file: https://docs.google.com/open?id=0B56NVZ ... Z2REdnRPUQ
Maybe range will improve after couple full cycles as i have done just one, will see. Cheers

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Re: Stand-up escooter, ze Meduza project

Post by EBJ » Apr 09, 2012 1:57 pm

looks great, but I just noticed you never braced that back post (where the coil-over attaches). Point a video camera at that part, then hit a bump and see how much deflection you get. I'm still concerned that is going to bend. Perhaps you can make a bolt-on brace if you didn't want to ruin the nice paint-job... ?

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Re: Stand-up escooter, ze Meduza project

Post by agniusm » Apr 09, 2012 3:03 pm

Hi. Thanks for advice, and i did thought about it. Thing is 100+kg man was riding it half a mile on rough road and it was ok. Now my wife is 56kg which this bike is meant for so i am pretty confident, even me at 65kg feels solid

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Re: Stand-up escooter, ze Meduza project

Post by EBJ » Apr 09, 2012 5:28 pm

good to know. now lets see some fun video footage of this thing!
(love the attention to detail... horn, kick-stand, lights, ect...)

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Re: Stand-up escooter, ze Meduza project

Post by agniusm » Apr 10, 2012 2:26 am

Here are some photos of finished scooter, i have done minor adjustments after to front fender, and still waiting on voltmeter which will go under ignition key.
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Here is couple of vids:
My brother testing:

My wife:

Wifes friend

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Re: Stand-up escooter, ze Meduza project

Post by Astropower » Apr 10, 2012 3:58 pm

Looks great,

Very high quality job you done.

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Re: Stand-up escooter, ze Meduza project

Post by Brentis » Apr 11, 2012 1:43 pm

Great Job Bro. :mrgreen:
Turned out real professional lookin'.
Monitor that seat post/batt. box joint for awhile.
Lots of inspiration to be had in this build. :D
Enjoy.

So what's next for ya? :wink:

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Re: Stand-up escooter, ze Meduza project

Post by agniusm » Apr 11, 2012 3:17 pm

Thanx mate, glad you find something useful. Next, full scale production full suspension 70kmh cargo bike with recumbent seat and changeable base. But that wil be next year. First building a proper workshop and fitting new equipment, hopefully ESAB TIG in spring 2013.


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