E-Bikekit.com 36v 10ah LiFePo4 Battery

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Ypedal   100 GW

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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Ypedal » Feb 12 2009 6:48pm



8)
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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Ypedal » Feb 12 2009 7:37pm

And a short crappy video of how i went about this.. :lol:

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Russell   10 MW

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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Russell » Feb 12 2009 7:43pm

We need to see discharge curves, no battery test is complete without discharge curves :P

-R
Jeep Comanche Trekking Bike w/YOUE geared motor, 42 lbs + 15 lb rear trunk bag w/12S 16Ah LiPo battery, tools, etc., 21A controller, 700 x 40C tires. 27 MPH.


My other E-Bikes: Nashbar Steel Flatbar

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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Ypedal » Feb 12 2009 7:49pm

I may have to forward this bad boy to the good Dr. ! :wink:
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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Ypedal » Feb 15 2009 3:20pm

So monday night ( Feb 10 ) i fully charged the pack, let it sit on the desk until Feb 12 when i took the video's above, since i can't dump all that heat into a bicycle rim without melting something, it's been 1 minute 0.5ah at a time, let rim cool, another 0.5ah.. etc...

All the way to this, tonight Feb 15.

The BMS cut out at 9.3ah, using 20 amps all the way, spikes of 30 amps ( Controller will allow up to 80 :twisted: !! but i don't push it that hard :oops: )

Very steady voltage, 10 amps gives you 36v, 15 amps is 35v, 20 amps is 34v .. + - 1v on SOC up to the 9ah mark.

( The 38.4v you see on the meter below is the resting voltage of the empty pack, once the BMS cuts out it stays off until you disconect and reset. )
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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by ptalmage » Feb 17 2009 8:52am

What is the cutout voltage of the BMS? The LiFePo4 battery pack I have has no low voltage cut off so I have been "manually" cutting off at around 33 when the capacity seems to be gone anyway. Thanks

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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Ypedal » Feb 17 2009 9:44am

For LiFePo4 .. Min voltage should be 2v per cell.

The BMS on this pack cuts out at 2.3v per cell for pack voltage of 27.6v
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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Ypedal » Feb 22 2009 11:50am

Just got back from a 10km ride, roads are fair ( well.. i can see pavement.. so.. well... you know. :| )

I wrapped the pack in a towel before placing it into my backpack, purpose was to keep the heat in ...

Bolted on a Cycle Analyst to my eZee bike, strapped on my Giro helmet, and away i went.

Don't take much to make the legs burn after a winter cooped up in the house.. i walk the dog daily but walking 30 minutes is nothing like pedaling for 20..

No heat, no cutouts, all good !

The andersons at the controller kept comming apart as the zip ties don't hold very well in cold weather, so i ended the trip at 10k .

More on this once the E-BikeKit motor shows up !!! 8)
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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Ypedal » Mar 22 2009 8:09am

An update on the EBK battery pack, 8)

On friday ( March 20, 2009 ) after work, i plugged the pack in for a top off charge and then placed it outside to chill out !

(-5) degrees Celsius = 23 degrees Fahrenheit

Brrrrrrrrr.... Yes.. that is indeed snow in my driveway.. this is Moncton NB, still plenty of the nasty white stuff out here !
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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Ypedal » Mar 22 2009 8:15am

About 3 hours later ( 9:30pm ) the temps dipped down even more:

(-7.5) degrees Celsius = 18.5 degrees Fahrenheit :twisted:
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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Ypedal » Mar 22 2009 10:34am

My digital camera does not take very good night pictures, was also set to auto vs night.. but anywho.. This is me with my full face helmet, toque, winter gloves, winter coveralls, and coat, Rocky boots, and one cold ebike ! :lol:
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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Ypedal » Mar 22 2009 10:37am

Also one COLD ebike battery !
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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Ypedal » Mar 22 2009 10:50am

So, off into the night i went. Thank god it was not windy, cuz it was cold by my usual riding standards..

Zero pedaling, 30psi tires to help increase the contact patch, full throttle for about 4.4ah, around my front street loop, incline that will make the eZee controller take 20 amps for 7 full seconds at a time, level ground at 10 amps, down hill at 5 amps level ground 10 amps.. and back up to the 20amp hill.. over and over and over again.

At the 4.4ah mark i had to come home and warm up, left the bike and battery outside for 10 minutes.. then out for more until the BMS cut out at the 7.494 ah mark !

It cut out going up the 20amp section, voltage from the start to the end ranged from 32 to 35v, nice flat dishcarge , at the 7ah mark it started to go into the 30 then 29v, and then the 1st cutout. I'm sure it would easily be possible to get 8+ah with a bit of throttle control.

I was pushing this pack into a worst case scenario of cold storage, cold usage, NO pedal assist, and harsh throttle use..

CA Meter says :
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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Ypedal » Mar 22 2009 10:51am

Range : 18 kms
My weight: 190 lbs + with winter gear, and low tire pressure.
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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Doctorbass » Mar 22 2009 12:49pm

That's an excellent review of this pack Ypedal!!!

I am searching for 7 complete ebike kits for my familly and wait for quote. i'll take account of that review of this pack for my choice!

lol.. it's like my familly just waked up and now.. everyone want a kit after they tried mine.. (they still know it's not the same price range.. but they want to experience great torque on offroad and 40km on pavement during summer...

So i guess 48V 10 or 15Ah would be fine...( if n pedal) i asked to the nine continent compagny if they could have these packs...

Doc
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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by E-BikeKit.com » Mar 22 2009 3:02pm

Deleted. Thank you to all at ES.
Last edited by E-BikeKit.com on Dec 05 2009 2:51pm, edited 1 time in total.

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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Doctorbass » Mar 22 2009 4:03pm

E-BikeKit.com wrote:Nine Continents does not make or sell the E-BikeKitâ„¢ 36v 10ah LiFePo4 battery pack.
The E-BikeKitâ„¢ LiFePo4 is sold by E-BikeKitâ„¢ and it's dealers only.
Thanks for the clarifications Jason.

Doc
CURRENT PROJECT: 2WD duo MXUS/Max-E ebike 32kW
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-Fastest 1/4 mile@ 114km/h on flat and 16.316 sec
-Succeded to haul a 19200 pounds schoolbus!
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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by drasp » Mar 23 2009 10:14am

Anyone have thoughts/info on how this pack should deal with a 5A charger vs. the 2A included charger?
*NOTE: I will do my best to reply to PMs in a timely manor, but I am only "at work" from Wed-Fri, thanks for your patience!

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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Ypedal » Mar 23 2009 10:33am

The cells can take it i'm sure, the BMS would get a tad bit hot trying to ballance at higher rates,

I can use my Thunder Power charger to test this.. will try this tonight if i can find some spare time !! :wink:

Expecting delivery of a surprise today.. more on that later !
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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Doctorbass » Mar 23 2009 10:59am

Ypedal wrote:The cells can take it i'm sure, the BMS would get a tad bit hot trying to ballance at higher rates,

I can use my Thunder Power charger to test this.. will try this tonight if i can find some spare time !! :wink:

Expecting delivery of a surprise today.. more on that later !
A surprize delivery??.. Mmmm interesting!.. keep us informed! :mrgreen:

Doc
CURRENT PROJECT: 2WD duo MXUS/Max-E ebike 32kW
http://endless-sphere.com/forums/viewto ... =3&t=65764
-Fastest speed record 117 km/h on flat
-Fastest 1/4 mile@ 114km/h on flat and 16.316 sec
-Succeded to haul a 19200 pounds schoolbus!
113kmh Gianthttp://www.evalbum.com/3406
Mongoosehttp://www.evalbum.com/1947
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drasp   100 µW

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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by drasp » Mar 23 2009 11:12am

Mmmmmmmmmm, surprise. :mrgreen:

Would be way cool to hear your findings re: the BMS's ability to handle 5A charaging/matching.

I assumed the cells would be fine w/ that, that's .5C charging right? Do C rates apply the same for charging cells as for discharging? (not to get too OT)
*NOTE: I will do my best to reply to PMs in a timely manor, but I am only "at work" from Wed-Fri, thanks for your patience!

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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Ypedal » Mar 28 2009 6:26pm

Ok... well i promissed a surprise and here it is !
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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Ypedal » Mar 28 2009 6:30pm

It was mentioned that a similar looking battery could be found online from other sources, when i asked Jason at E-BikeKit about it he assured me that others were not the same as his and would not be of the same quality..

Ever the skeptic that i am, i wanted proof and would never assume such a thing. :wink:

So here is it folks, proof. :shock:
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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Ypedal » Mar 28 2009 6:34pm

For initial observations,

No nice foam packing like the EBK pack, but rather some crumpled pellet stuff..

Handle was rather loose, and one of the screws that hold the end caps on was not even fully screwed in !!! :shock: :shock:

Shaking the pack, something was rattling inside the pack... ????
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Re: E-Bikekit.com 36v 10ah LiFePo4 Battery

Post by Ypedal » Mar 28 2009 6:44pm

Wasted no time, took this sucker apart on the double.... :D

Found the source of the rattle, one of the nuts that holds the handle on the pack came off and was bouncing around in there.. thank god it did not get into any bad spots.... :cry:

Surprise Surprise.. NOT the same cells or BMS !!!!

The BMS is shrink wrapped, typical duct tape methods..

Cells are 26650's...
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