Power in Flux

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Spoonman replied to the thread DAYI Motors E-Odin.
" Ooof - that's a lot of weight a long way off the ground.
Wouldn't fancy that one at low speeds. "

3 Days Ago

Spoonman replied to the thread Vectrix VX-1 Leaf module conversion.
" Literally just finishing up another one of these this evening - latest one had a Zeva BMS as part of the deal and I got some learning related to that along the way.
Worth noting that I've found the vectrix parts lad in Poland to be very reliable and would have no problem buying from them again - wouldn't be keen to rely on them for support though, so you need to go in knowing what you need and how to use it.
David Dugas has made all his stuff freely available, which makes programming and configuring a breeze once you have the Peak PCAN cable.

Might throw up a few pics of the process later if I get a minute, along with a couple of the salient learnings. "

3 Days Ago

Richard230 created the thread Alrendo motorcycles TS Bravo.
" What I find interesting about this electric motorcycle design are all of the (apparent) cooling vents on the front and sides of the bike. https://electricmotorcycles.news/fir...e-netherlands/ "

3 Days Ago

Electric-zero clicked Likes for this post: Sevcon Gen 4 Size 6 w/wire harness for sale by EVcycle

6 Days Ago

EVcycle replied to the thread Sevcon Gen 4 Size 6 w/wire harness for sale.
" Sold!!! "

1 Week Ago

Stevo clicked Likes for this post: Kawasaki zxr-E by flo

1 Week Ago

flo replied to the thread Kawasaki zxr-E.
" Hi,
as the kelly only releases full power after approx 15kmh actual 0-80 is not as spectacular as one would assume. Still real fun.
On the other hand it is an almost elastic feel with a smooth transition and is just awesome to ride like that.
from 15kmh on it pulls very nice. Not timed it so i guess comparable to a modern 400 or older 600 bike
Kelly is still on 90 % for bats not jet run in fully.
I already called a buddy so we can take timing and compare to his bike...probably some sunday morning..
greets "

1 Week Ago

Stevo replied to the thread Kawasaki zxr-E.
" Top speed aside, how would you describe the feel of acceleration from 0-80? Fun, ya?!! "

1 Week Ago

Stevo clicked Likes for this post: Kawasaki zxr-E by flo

1 Week Ago

flo replied to the thread Kawasaki zxr-E.
" Hi all,
well the 500 km mark has fallen. No problems with the bike so far, only one minor upgrade had been necessary.
Well after the initial test rides done, i took the bike for some longer rides of course and thus charging times have gone up too.
This revealed the charger getting quite warm if not hot. Not to the point of overheating but i did not like the fact and it surely been a design flaw that i could have avoided if i had used my brain right from the start.
I had thought that the air around the charger and the aditional cutouts in its holder would provide enough cooling to the lower side mounted fan. Well, not the case.
Attachment 8676

Attachment 8677

So yesterday being a public holiday i took out the charger, and realised that the fan in it will draw air in centrally and spreading it out through the cooling fins. Which in my case lead to it sucking the warm air in again from the surrounding battery box.
So a few crude big holes were drilled into the plastic and now one can feel the charger sucking in the air below and pushing it out to the sides. Charger does not exceed abut 45 deg C.
Easy fix.
Attachment 8678

Taking the opportunity i had look around all bolts and such, but as using either self-locking or lock-tited nuts nothing had come loose in the meantime.

AS for Autonomy:
Today i took it for a long ride, near fully charged to 97 Volts going down to 84V (3,5V/cell) using 68 Amphrs. Quite sporty driving got me 108 Km/ some 65 miles with an estimated 20-25 km reserve. Which i did not use up for the rain coming in fast. Just made it home 2 mins before the storm hit.
At this voltage one should start to keep acceleration somewhat more easy as i have seen 79 volts ( 3,3 per cell) at full load a few times on the last 2, 3 km.
But still, a solid 100 km or 130-135 ish if one goes a little more easy. I could not be more happy with the autonomy.
Some WOT runs revealed 130 kmh (80 ish mph)on the odometer which, even if not accurate checks nicely against my calculations of around 128 kmh.

All in all i`d say mission fulfilled "

1 Week Ago

billmi replied to the thread Ninja 250 project bike.
" And it's now in parts form.
If interested in the frame, it's on Facebook marketplace and spacoast craigslist. Major components (motor, charger, controller, etc.) will be up on eBay over the next week. "

1 Week Ago

Stevo replied to the thread DAYI Motors E-Odin.
" It appears the are trying to make it look like a BMW K model "

1 Week Ago

Richard230 created the thread DAYI Motors E-Odin.
" Here is a company that has announced a new electric-drive motorcycle that appears to have been designed to look a lot like an old BMW K-bike. It has a decent size battery, although the motor isn't all that powerful especially considering that it is loaded with hard luggage and is designed to carry two people. But they really need to do something about that model's name: https://electricmotorcycles.news/day...rcycle-e-odin/ "

1 Week Ago

Stevo replied to the thread Aloha from Hawaii!.
" Aloha and have fun with it! "

1 Week Ago

Frank replied to the thread Farasis announces a new battery design.
"
Quote Originally Posted by Richard230 View Post
Not a chance. I think they are tied up with a couple of major auto manufacturers now that have invested in the company recently. Zero ought to hope that they continue to receive the Farasis batteries for their bikes and don't get cut out of the action in the future due to demand by the big guys once production and sales of their EVs are ramped up.
I know. I've tried calling and emailing in the past with no response. Finding decent pouch cells is getting pretty hard these days.

Sent from my SM-T380 using Tapatalk "

1 Week Ago

Frank replied to the thread What is generally considered the best BMS for 72v Lifepo4 builds currently?.
" Buy good cells and use a conservative design and they'll probably stay closer together anyway.

Sent from my SM-T380 using Tapatalk "

1 Week Ago

Ukalele created the thread Aloha from Hawaii!.
" Just popping in to get ideas. I've been thinking about building one of these. I can get a nice frame for cheap and then figure out the components to put on it. We will see what happens. "

2 Weeks Ago

Levi_allen replied to the thread What is generally considered the best BMS for 72v Lifepo4 builds currently?.
"
Quote Originally Posted by Frank View Post
You could probably bypass discharge mode with one of the cheaper Bluetooth bms units and just run the charger through it.
Thatís a great point. With the size battery bank Iím building either 24s 6-10p depending, I need to make a decision on what size capacitors on on the BMS in the first place. Either capable of 1ah 5ah or 10ah balance is what Iím thinking. Obviously smaller capacitor units are cheaper "

2 Weeks Ago

Stevo replied to the thread Farasis announces a new battery design.
"
Quote Originally Posted by Richard230 View Post
Not a chance. I think they are tied up with a couple of major auto manufacturers now that have invested in the company recently. Zero ought to hope that they continue to receive the Farasis batteries for their bikes and don't get cut out of the action in the future due to demand by the big guys once production and sales of their EVs are ramped up.
OUCH! That could really dampen Zero's ability to exist and thrive. I hope for Zero's sake that doesn't happen "

2 Weeks Ago