E-S Stealth Electric Bike Owners

Show off your E-bike creation here.
User avatar
Cowardlyduck
10 MW
10 MW
Posts: 2331
Joined: Jun 26, 2011 8:41 pm
Location: Canberra, ACT, Australia

Re: E-S Stealth Electric Bike Owners

Post by Cowardlyduck » Dec 18, 2017 5:16 am

Needed a break from building my new battery, so what better way than to take the Fighter for a quick spin after work. :mrgreen:
Image
Image
Image
Image

My Fighter is hitting 6.5KW regularly now after I unlocked the firmware on my Mini-E and cranked the amps up to 90. When the motor is cold, it pulls so dam hard from 10kph-50kph I feel like the handle bars might snap. :shock:
I have noticed a bit of a creaking sound under load however. Not sure where to look TBH, but it seems to be coming from the rear end...sure hope it's not anything serious...but if it is, at least it's not terribly difficult to get things welded back together on these steel frames. :)

Cheers
High Power LiPo wiring harnesses - 4P - XT90, HXT4mm, 5.5mm. 200Amp+ capable. Global shipping.

Modified Stealth Fighter - Force air cooled Leaf motor @ 6KW, Heat-sinked Adaptto Mini-E. Battery = 49AH, 14S (51.1V) Sanyo 18650GA - 2.5Kwhr = 200km range!
Cowardlyducks - Stealth Fighter Videos

BikeE recumbent - Golden motor, 6Fet Grinfineon, internal 17AH, 14S Sanyo 18650GA, + on-board solar.

The stuff I make and modify.

User avatar
Rix
100 GW
100 GW
Posts: 6141
Joined: Mar 29, 2012 11:26 am
Location: Fallon NV USA

Re: E-S Stealth Electric Bike Owners

Post by Rix » Dec 18, 2017 5:25 pm

What a coincidence CD. I went for a ride also earlier this morning. When I left, it was 12F. When I returned, it had warmed up to a balmy 14F. One thing I can say about the LG cells Stealth is using for the P7, they are not affected by cold temps as much as the pouch cells and Lifpo4 are.

User avatar
Cowardlyduck
10 MW
10 MW
Posts: 2331
Joined: Jun 26, 2011 8:41 pm
Location: Canberra, ACT, Australia

Re: E-S Stealth Electric Bike Owners

Post by Cowardlyduck » Dec 24, 2017 2:28 am

I finished the easy part of my battery build...now for the hard part of the end to end modules.
If I just laid them flat, then folded them over the length of nickel would be far too long, so I had to place the modules at 90 degrees to each other in order to achieve the right length.
Image
Image

With a lot of double checking, trimming excess nickel and welding things only once in the right position, I finally managed to get the cells sitting nicely end-to-end.
Image
Image
It took the better part of 3 hours just to do that one.

Now to do this another 3 times, plus the end link to the rest of the pack...good thing I've got some time off work. :)

Cheers
High Power LiPo wiring harnesses - 4P - XT90, HXT4mm, 5.5mm. 200Amp+ capable. Global shipping.

Modified Stealth Fighter - Force air cooled Leaf motor @ 6KW, Heat-sinked Adaptto Mini-E. Battery = 49AH, 14S (51.1V) Sanyo 18650GA - 2.5Kwhr = 200km range!
Cowardlyducks - Stealth Fighter Videos

BikeE recumbent - Golden motor, 6Fet Grinfineon, internal 17AH, 14S Sanyo 18650GA, + on-board solar.

The stuff I make and modify.

User avatar
Rix
100 GW
100 GW
Posts: 6141
Joined: Mar 29, 2012 11:26 am
Location: Fallon NV USA

Re: E-S Stealth Electric Bike Owners

Post by Rix » Dec 24, 2017 4:47 am

Pics 1 and 2, it looks like crap, but in pics 3 and 4, with everything trimmed up, it looks clean and neat. Awesome CD.

Theodore Voltaire
10 MW
10 MW
Posts: 2048
Joined: Sep 26, 2013 11:41 pm
Location: Dallas

Re: E-S Stealth Electric Bike Owners

Post by Theodore Voltaire » Dec 26, 2017 9:49 pm

This is a secret leaked picture of Rix new phone

Image

User avatar
Rix
100 GW
100 GW
Posts: 6141
Joined: Mar 29, 2012 11:26 am
Location: Fallon NV USA

Re: E-S Stealth Electric Bike Owners

Post by Rix » Dec 27, 2017 2:23 pm

Theodore Voltaire wrote:
Dec 26, 2017 9:49 pm
This is a secret leaked picture of Rix new phone

Image
The funny thing is, I just got a new phone to replace my flip phone. Believe me when I say this, I went backwards. If you recall, before flip phones were around, cell phones just had a screen and number panel below it. Well, got one of those, check out the pic, it doesn't even flip.
Attachments
sonim.jpg
sonim.jpg (39.96 KiB) Viewed 532 times

User avatar
Cowardlyduck
10 MW
10 MW
Posts: 2331
Joined: Jun 26, 2011 8:41 pm
Location: Canberra, ACT, Australia

Re: E-S Stealth Electric Bike Owners

Post by Cowardlyduck » Dec 28, 2017 6:19 am

Hardest part done on this battery:
Image
Image
Image

And after I awkwardly join the end to end section to the main section is the second hardest part...all the balance wiring. I hate doing the balance wiring as I'm paranoid I might let the wires touch the wrong spot, or not order them correctly to the balance plugs, but having done it plenty of times before I know I can do it...it's just a matter of sucking it up and going for it. :mrgreen:
Then I can do my first test charge/discharge.
I sure hope I don't have any dud cells...It's gonna be a royal PITA to swap out any duds in the middle.

Cheers
High Power LiPo wiring harnesses - 4P - XT90, HXT4mm, 5.5mm. 200Amp+ capable. Global shipping.

Modified Stealth Fighter - Force air cooled Leaf motor @ 6KW, Heat-sinked Adaptto Mini-E. Battery = 49AH, 14S (51.1V) Sanyo 18650GA - 2.5Kwhr = 200km range!
Cowardlyducks - Stealth Fighter Videos

BikeE recumbent - Golden motor, 6Fet Grinfineon, internal 17AH, 14S Sanyo 18650GA, + on-board solar.

The stuff I make and modify.

User avatar
Rix
100 GW
100 GW
Posts: 6141
Joined: Mar 29, 2012 11:26 am
Location: Fallon NV USA

Re: E-S Stealth Electric Bike Owners

Post by Rix » Dec 28, 2017 11:37 pm

Hey CD, hats off to you, you are building on hell of a battery there. I hope its good and no duds as replacing a cell will be a royal PITA.

JtHaas
10 W
10 W
Posts: 68
Joined: Oct 17, 2016 6:10 pm
Location: San Fernando Valley

Re: E-S Stealth Electric Bike Owners

Post by JtHaas » Dec 29, 2017 2:46 pm

Sending prayers for no dud cells!
Also Rix, your phone is looking good :lol: I hope the camera got a little better!

User avatar
Rix
100 GW
100 GW
Posts: 6141
Joined: Mar 29, 2012 11:26 am
Location: Fallon NV USA

Re: E-S Stealth Electric Bike Owners

Post by Rix » Dec 30, 2017 3:03 am

JtHaas wrote:
Dec 29, 2017 2:46 pm
Sending prayers for no dud cells!
Also Rix, your phone is looking good :lol: I hope the camera got a little better!
Thanks bro, we shall see :lol:

Brute
100 W
100 W
Posts: 148
Joined: Feb 04, 2012 2:51 am
Location: Melbourne outer east

Re: E-S Stealth Electric Bike Owners

Post by Brute » Dec 30, 2017 4:07 am

Very nice work on the battery build Mr Duck . It`s something I`ll have to attempt soon .

User avatar
Cowardlyduck
10 MW
10 MW
Posts: 2331
Joined: Jun 26, 2011 8:41 pm
Location: Canberra, ACT, Australia

Re: E-S Stealth Electric Bike Owners

Post by Cowardlyduck » Dec 30, 2017 6:14 am

Thanks for the kind words guy's.
Today, I joined the 2 pack halves together. It was a little challenging keeping the end-to-end section balancing upright while I spot welded it, but it was the best way to get the job done right.

Image
Image
Image
Image

I put some old tube in as a separation layer. This may only be temporary for now as I still need to do the balance wiring, but it seems like it will be a good option as the permanent separation also since I need something thin, but also not permanently compressible like how packing foam can squash down if repeatedly compressed. Coroflute (election signs) is another option, but it's lot thicker so not ideal. I might also put some thermal padding in there as it conforms nicely around the wires I will have to run for balancing.

Image

Aside from this I also did some other work on my Fighter today...however no photo's sorry.
I finally ditched the rear Gator brake that had been hanging around like a bad smell since 2011 as I finally used up my last set of pads for it. Now I have a nice Magura MT2 in the rear to complement the MT4 on the front. :mrgreen:
I also ditched the crummy cheap Sunrace derailleur I had been using for a long time, and switched a semi-decent Shimano Acera unit. It's by no means high end, but should certainly help when it comes to shifing...recently I had been having to shift up 2 then down 1 just to get it to shift up one gear.

Now I can't procrastinate doing the balance wiring any more....going to have to suck it up and do it. :|

Cheers
High Power LiPo wiring harnesses - 4P - XT90, HXT4mm, 5.5mm. 200Amp+ capable. Global shipping.

Modified Stealth Fighter - Force air cooled Leaf motor @ 6KW, Heat-sinked Adaptto Mini-E. Battery = 49AH, 14S (51.1V) Sanyo 18650GA - 2.5Kwhr = 200km range!
Cowardlyducks - Stealth Fighter Videos

BikeE recumbent - Golden motor, 6Fet Grinfineon, internal 17AH, 14S Sanyo 18650GA, + on-board solar.

The stuff I make and modify.

User avatar
Cowardlyduck
10 MW
10 MW
Posts: 2331
Joined: Jun 26, 2011 8:41 pm
Location: Canberra, ACT, Australia

Re: E-S Stealth Electric Bike Owners

Post by Cowardlyduck » Jan 02, 2018 6:11 am

Almost done on this painful balance wiring...and went a bit nuts on the Kapton tape. :lol:
Image
Image
Image
Image

I also got the main discharge done...that was a lot of solder...didn't get any decent photo's, but I laid the 8awg wire down across a latticed extension of nickel, then weaved it back through the nickel lattice before looping it out...it's way overkill, but better that than letting it be the weak link in this thing.

Strangely, one group of cells was about 8mv higher than the rest...hope that's not a sign of a bad cell, but I'll keep an eye on it and hope for the best :|

Next is the last 2S balance wiring/plug, then all the strategic padding and mega shrink wrap. I still need to do a bit more wiring to cover off auxiliary power, and trim the main discharge to the right length, then I'm also going to be adding a 125A circuit breaker into the mix for some level of safety. :D Not exactly sure where I will mount it, but the spot right underneath the rear shock looks good.

Cheers
High Power LiPo wiring harnesses - 4P - XT90, HXT4mm, 5.5mm. 200Amp+ capable. Global shipping.

Modified Stealth Fighter - Force air cooled Leaf motor @ 6KW, Heat-sinked Adaptto Mini-E. Battery = 49AH, 14S (51.1V) Sanyo 18650GA - 2.5Kwhr = 200km range!
Cowardlyducks - Stealth Fighter Videos

BikeE recumbent - Golden motor, 6Fet Grinfineon, internal 17AH, 14S Sanyo 18650GA, + on-board solar.

The stuff I make and modify.

User avatar
Cowardlyduck
10 MW
10 MW
Posts: 2331
Joined: Jun 26, 2011 8:41 pm
Location: Canberra, ACT, Australia

Re: E-S Stealth Electric Bike Owners

Post by Cowardlyduck » Jan 04, 2018 4:08 am

I've still got a bit to go on the battery, but I thought I should do a test fit now that I've finished all the balance wiring and main discharge wires.
And I'm pleased to say, it's a perfect fit.
Image
Image
Image
There's just enough room to add a decent enough amount of padding before I heat-shrink, and I will also be able to fit my circuit breaker up in the neck area.

One mistake I did make (although it's not a huge deal) is I setup all the wiring to come out the top of the pack. This makes sense from a physical protection perspective, but doesn't make sense from an electrical perspective since it requires a long run of wire back around the pack down to the controller.
I'm thinking of using 6AWG wire for this so it doesn't cause any increased resistance as it's too late to change the pack design now.
At least doing a run of wiring back around the pack makes it heaps easier to use my circuit breaker.

I did have one setback though...I was trying to sort out my new Shimano Acera derailleur and somehow managed to snap off the little spring loaded stopper notch thingy. :roll: These newer derailleur designs have so many springs and levers I'm never quite sure if I'm doing it right. :lol:

Cheers
High Power LiPo wiring harnesses - 4P - XT90, HXT4mm, 5.5mm. 200Amp+ capable. Global shipping.

Modified Stealth Fighter - Force air cooled Leaf motor @ 6KW, Heat-sinked Adaptto Mini-E. Battery = 49AH, 14S (51.1V) Sanyo 18650GA - 2.5Kwhr = 200km range!
Cowardlyducks - Stealth Fighter Videos

BikeE recumbent - Golden motor, 6Fet Grinfineon, internal 17AH, 14S Sanyo 18650GA, + on-board solar.

The stuff I make and modify.

User avatar
Rix
100 GW
100 GW
Posts: 6141
Joined: Mar 29, 2012 11:26 am
Location: Fallon NV USA

Re: E-S Stealth Electric Bike Owners

Post by Rix » Jan 04, 2018 1:55 pm

That is a perfect fit. I think you do have the current record for most battery fit into a Fighter.

JtHaas
10 W
10 W
Posts: 68
Joined: Oct 17, 2016 6:10 pm
Location: San Fernando Valley

Re: E-S Stealth Electric Bike Owners

Post by JtHaas » Jan 05, 2018 2:58 am

Cowardlyduck wrote:
Jan 04, 2018 4:08 am

And I'm pleased to say, it's a perfect fit.
Image
Eye candy
That fits amazing in there. Really great work you did there CD I'm envious :)

What motor/watts are you planning on running with that big thing? Sorry if that question has been asked a hundred times!

User avatar
Rix
100 GW
100 GW
Posts: 6141
Joined: Mar 29, 2012 11:26 am
Location: Fallon NV USA

Re: E-S Stealth Electric Bike Owners

Post by Rix » Jan 05, 2018 4:29 am

JtHaas wrote:
Jan 05, 2018 2:58 am
Cowardlyduck wrote:
Jan 04, 2018 4:08 am

And I'm pleased to say, it's a perfect fit.
Image
Eye candy
That fits amazing in there. Really great work you did there CD I'm envious :)

What motor/watts are you planning on running with that big thing? Sorry if that question has been asked a hundred times!

I am betting with this big of a battery, volt sage will be very minimal, thus, more peak watts potential! :arrow:

User avatar
Cowardlyduck
10 MW
10 MW
Posts: 2331
Joined: Jun 26, 2011 8:41 pm
Location: Canberra, ACT, Australia

Re: E-S Stealth Electric Bike Owners

Post by Cowardlyduck » Jan 05, 2018 6:16 am

Yeah, this thing is a monster alright, and while it has the potential for up to 140A @ ~53V (7.4KW), I will probably only push it as far as 100A peak, maybe up to 125A or 6.5KW. I'm building it more for long range on fire trails where power draw is 3-4KW most of the time and I'm using it with a tiny 6 FET Mini-E controller which doesn't like huge power for long periods.
JtHaas wrote:
Jan 05, 2018 2:58 am
What motor/watts are you planning on running with that big thing? Sorry if that question has been asked a hundred times!
I swap between a '1500W' Leaf motor and a HS4080, both of which have internally mounted fans, vent holes, and heat sinks all around the outside of the magnet ring. Check this thread for all the details:
https://endless-sphere.com/forums/viewt ... 0#p1123565

So I made some good progress on finalising the battery today.
I did all the padding using a combination of thermal padding, old inner tube and varying thicknesses of foam I had from packaging.
Image
Image
Image
Image
Image

I used some large PVC heat-shrink over the whole lot, and some more heat-shrink, hot glue and zip ties to secure the wire exit.
Image
Image
Image
Image

My goal with this battery was to keep the weight around or below 10KG...well I think this counts :D
Image

I was curious to see how much of that weight was from the nickel strip, since I used quite a lot doing 3 layers all throughout the whole pack.
Image
This coil was 1KG when I started the build with about 10% being wastage, off-cuts and a few other things, that puts approx. 200g of nickel in the pack.

I'm still not done yet...got a bunch of XT150 connectors to solder (how the hell am I going to do that with 6AWG wire :lol: ), and need to sort out the aux wiring also, but the hardest part is definitely done. :D

Cheers
High Power LiPo wiring harnesses - 4P - XT90, HXT4mm, 5.5mm. 200Amp+ capable. Global shipping.

Modified Stealth Fighter - Force air cooled Leaf motor @ 6KW, Heat-sinked Adaptto Mini-E. Battery = 49AH, 14S (51.1V) Sanyo 18650GA - 2.5Kwhr = 200km range!
Cowardlyducks - Stealth Fighter Videos

BikeE recumbent - Golden motor, 6Fet Grinfineon, internal 17AH, 14S Sanyo 18650GA, + on-board solar.

The stuff I make and modify.

User avatar
Lash
10 W
10 W
Posts: 95
Joined: Jun 09, 2015 5:33 am
Location: Bendigo
Contact:

Re: E-S Stealth Electric Bike Owners

Post by Lash » Jan 06, 2018 12:22 am

Wow, epic battery build CD. Certainly going all out fancy configuration for ultimate cell capacity!

Its good timing too, as I am about to build a new battery for a Bomber for a guy in sydney.
(I have 4 packs under my belt now!)

He has an original bomber battery, I was wondering if you guys had any info / advice before i get started. Below are some details and assumptions, and would love any feedback.


I plan to go with a 20s10p pack 2 layers of Samsung 30q cells.
This should fit ok from what i have gathered. (each p group will have 2 rows of 5 cells wide to fit) similar to my alpha battery.
I will use a new BMS for 72v (20s)
Will the existing charger be ok? Or will he need a new one because of slight difference in cell chemistry? (original bomber pack uses lifepo4 i believe)

He plans on using the existing bomber controller, I am assuming this new battery can just plug straight in, and the controller will be fine? or will there need to be controller software config changes / updates or not compatible?

He hasn't shown me the plug ends yet - so will have to come up with something so it can plug straight in. I wont have access to the bike.

I suppose worst case scenario he can change out a connector on the bomber or get an auto-electrician to do it if hes not up to the task.

I'll go for the hot-glue & tape approach again over the cell holders.

Anything I am missing?

Cheers, Lash.

User avatar
Cowardlyduck
10 MW
10 MW
Posts: 2331
Joined: Jun 26, 2011 8:41 pm
Location: Canberra, ACT, Australia

Re: E-S Stealth Electric Bike Owners

Post by Cowardlyduck » Jan 06, 2018 3:37 am

Thanks Lee!

The pack config and plugs might depend on the build date of the original Bomber. I'm pretty sure the Bombers built around the same time as my Fighter (2011-2013) all used Andersons SB50 for the main discharge and Andersons PP30/45 for the charge connector.
If it's from that era, you shouldn't have any problems just plugging and playing with the original controller and charger.

Apart from that, I would suggest going with more than 10P if possible...although I'm sure your aware of the real world impact of high C rate discharge on 18650's.

As for my pack, today I finished off the final touches and mounted it in my Fighter. :mrgreen:
First was a partial bulk charge while monitoring the cells for any drift.
Image
Thankfully I saw no drift more than 20mv.

The wiring harness was a PITA to make, but necessary to let me use my fans and auxiliary temp display via my dash mounted buttons.
Image
I ditched the idea of using 6AWG as it was next to impossible to fit it in an XT150. 8AWG is still more than enough for the 6.5KW max I will run.

After all the padding I added, and the heatshrink around the wire exit, it was a bit of a tight squeeze to get the pack in.
Image

After a bit of massaging and excess heat-shrink trimming, it fits like a glove. Also, what you can't see in this photo is the 2 x 24" Gaadi two end tubes stashed just above the pack where the seat mounts.
Image

With the circuit breaker mounted up in the neck, it's a tight squeeze for all my bits and pieces up there.
Image
Image

I did some test rides around the back yard and managed to pull about 5.5KW with a voltage drop of only 5V which is pretty good IMO.

I do still have one last thing I want to do for this pack though. Because I don't run a BMS, I periodically balance charge after bulk charging. It's always a PITA to open up the side cover to gain access to the balance leads, so I put together an old Parallel cable setup which I will permanently mount up in the neck area. How I will fit it, I have no idea, but I'll make it work. :lol:
Image
Image

Cheers
High Power LiPo wiring harnesses - 4P - XT90, HXT4mm, 5.5mm. 200Amp+ capable. Global shipping.

Modified Stealth Fighter - Force air cooled Leaf motor @ 6KW, Heat-sinked Adaptto Mini-E. Battery = 49AH, 14S (51.1V) Sanyo 18650GA - 2.5Kwhr = 200km range!
Cowardlyducks - Stealth Fighter Videos

BikeE recumbent - Golden motor, 6Fet Grinfineon, internal 17AH, 14S Sanyo 18650GA, + on-board solar.

The stuff I make and modify.

User avatar
Lash
10 W
10 W
Posts: 95
Joined: Jun 09, 2015 5:33 am
Location: Bendigo
Contact:

Re: E-S Stealth Electric Bike Owners

Post by Lash » Jan 06, 2018 9:06 pm

Thanks for that info CD. As he is using existing controller with lowish amps (75a from memory) i think 10p of samsung 30qs should be no problem at all. And ample range, ill do a final design check incase i can make it 12p, but its all a trade off anyway for weight/cost etc.

I need to be able to make it simply and quickly and repeatable would be ideal.

Anyway, i'd be interested to know more about your temp gauge and sensor. Id like to install one on the FUTRs im building, especially seeing as i am running the controllers inside the frame with lower airflow.

- And i thought my bike was chockers with wires, yours is something else! That will make for a true long range beast... Maybe you could ride down to batemans bay through the forest from Canberra? I miss it up there!

User avatar
Cowardlyduck
10 MW
10 MW
Posts: 2331
Joined: Jun 26, 2011 8:41 pm
Location: Canberra, ACT, Australia

Re: E-S Stealth Electric Bike Owners

Post by Cowardlyduck » Jan 06, 2018 10:45 pm

Yeah, if you won't be exceeding 75A, then 10P should be fine in that case.

The temp sensor is one of these:
https://www.ebay.com.au/itm/New-Digital ... 0987350213
Image
I extended the wires and tucked the sensor between the windings and the stator supports in my motor. It's not super accurate, and does have a slight delay, but it's good enough for me to rely on compared to the tiny Adaptto temp display...which I also still have and use primarily for automatic power reduction/cutt-off when temps get really high.
The only catch with this sensor is that once the temp goes over 110C, the display just changes to HHH...but I actually like this as that is a good point to really take notice of the motor temp anyway and start backing off IMO...although my Adaptto doesn't start limiting power till about 130C.

Because I removed the CA display I had the perfect space to mount the temp LCD. I also rounded out the existing triangle shaped holes to mount 2 12mm latching push button switches.
https://www.ebay.com.au/itm/New-2pcs-Lo ... 1941222438
Image
One button turns on my DC-DC which sends 12V to the display, the other turns on my cooling fans.

I had issues mounting the LCD display due to the slots proximity to the button holes. In the end I had to remove the display from it's case, cut out some notches for the buttons and smother it in hot glue with some magnets embedded inside it to hold it to the inside of the frame. This has worked well now for quite some time.

Yeah it's crammed but the neck of my Fighter is a lot better than it was though...I used to cram extra LiPo packs up there a while back...that was nasty. :roll:
A ride down to Batemans Bay might be possible, but it would only be one way with a charge up down there before heading home. I might try it one day...we'll see.
Speaking of charging...it took the better part of 7 hours to get the dam thing up to 95% charge yesterday. About the only drawback of a massive pack...it takes for ever to charge with a standard charger. I'm still using the original 250W stock charger my Fighter came with from 7 years ago. :roll:
I might play with the amps pot on it (again) and crank it back up to 400W. I've done this before and while it does get a bit hot, it still works fine.

Cheers
High Power LiPo wiring harnesses - 4P - XT90, HXT4mm, 5.5mm. 200Amp+ capable. Global shipping.

Modified Stealth Fighter - Force air cooled Leaf motor @ 6KW, Heat-sinked Adaptto Mini-E. Battery = 49AH, 14S (51.1V) Sanyo 18650GA - 2.5Kwhr = 200km range!
Cowardlyducks - Stealth Fighter Videos

BikeE recumbent - Golden motor, 6Fet Grinfineon, internal 17AH, 14S Sanyo 18650GA, + on-board solar.

The stuff I make and modify.

User avatar
Cowardlyduck
10 MW
10 MW
Posts: 2331
Joined: Jun 26, 2011 8:41 pm
Location: Canberra, ACT, Australia

Re: E-S Stealth Electric Bike Owners

Post by Cowardlyduck » Jan 07, 2018 5:50 am

Well I couldn't resist. Even though I still don't have a chain/rear derailleur mounted, I took the new battery out for a spin tonight as the sun was setting.
Image
And it was a pretty spectacular sunset!
Image
Image

I hung around for a bit, and I'm glad I did as there was an even more spectacular lightning show as well.
Image
That's lightning, not the sun!

ImageImage
ImageImage

By then it was dark and I was up the top of a small mountain with only a dinky little light to get me down.
Image
I definitely need to sort out a better lighting situation on this thing.

Oh and one drawback of the red LCD temp display I use...it's pretty bright at night.
Image
But it can be easily turned off if it's a problem.

With no pedalling, I was hitting the new battery pack hard, drawing 6.5KW. My Boost mode amps limit is currently 115A which means it was giving me 115A at 56.5V. That's insane! The full charge voltage of this pack is 58.8, but I had not even fully charged it before this ride, so it was sagging less than 2V at 115A!
Image
My Adaptto could be overshooting the amps limit for a moment also, which is entirely possible. I know the CA does this also, so my assumptions above could be wrong, but even if they are...my average battery voltage being 52.1 means each cell was at 3.72V average for a 49.1Wh/km ride which is pretty hard going so that is certainly promising.
Oh and in case your wondering...I did hit 85Kph, but that was with a quick test of OVS 3 set on my Adaptto. The normal max speed with this battery and my 5T Leaf motor is about 65Kph which I'm more than happy with most of the time.

Cheers
High Power LiPo wiring harnesses - 4P - XT90, HXT4mm, 5.5mm. 200Amp+ capable. Global shipping.

Modified Stealth Fighter - Force air cooled Leaf motor @ 6KW, Heat-sinked Adaptto Mini-E. Battery = 49AH, 14S (51.1V) Sanyo 18650GA - 2.5Kwhr = 200km range!
Cowardlyducks - Stealth Fighter Videos

BikeE recumbent - Golden motor, 6Fet Grinfineon, internal 17AH, 14S Sanyo 18650GA, + on-board solar.

The stuff I make and modify.

User avatar
Rix
100 GW
100 GW
Posts: 6141
Joined: Mar 29, 2012 11:26 am
Location: Fallon NV USA

Re: E-S Stealth Electric Bike Owners

Post by Rix » Jan 07, 2018 5:57 am

Nice pics CD and very impressive performance. With the volt sag being so minimal, I bet it feels way faster than before.

User avatar
Cowardlyduck
10 MW
10 MW
Posts: 2331
Joined: Jun 26, 2011 8:41 pm
Location: Canberra, ACT, Australia

Re: E-S Stealth Electric Bike Owners

Post by Cowardlyduck » Jan 07, 2018 6:09 am

Thanks Rick.

Yeah, off the line it pulls much harder. To the point that if I'm not leaning forward it will loop out on me.

Because of the lower voltage it does stop pulling so hard a bit sooner than when I was running 18S LiPo, but I do feel a lot safer for it. I don't have enough fear sometimes and can easily get myself into trouble, so a lower top end keeps me a lot more sensible.

Cheers
High Power LiPo wiring harnesses - 4P - XT90, HXT4mm, 5.5mm. 200Amp+ capable. Global shipping.

Modified Stealth Fighter - Force air cooled Leaf motor @ 6KW, Heat-sinked Adaptto Mini-E. Battery = 49AH, 14S (51.1V) Sanyo 18650GA - 2.5Kwhr = 200km range!
Cowardlyducks - Stealth Fighter Videos

BikeE recumbent - Golden motor, 6Fet Grinfineon, internal 17AH, 14S Sanyo 18650GA, + on-board solar.

The stuff I make and modify.

Post Reply