DrkAngel wrote:"Homemade" 25.9v 31.2ah Li-ion pack.
Just finished my first trial run. Took 2 days. Cruised at an average 18 mph. Of course I was "forced" to take a few "runs" at 22+mph.
Cruised for about 30 miles, then spent today riding around town, checking out the local "Community Yard Sales Weekend" ... another 11 miles - 41 miles - total. Finally decided to recharge, after red battery level led flickered under moderate throttle, red led indicates 24v level.
Residual voltage was measured at 25.8v, down from 29.4v. Using a, very safe, 24.5v as empty, (3.5v per cell).
Wow! That figures to 55.8miles per "full charge" ... without pedaling!!!
edit: "Empty" recalibrated as 3.6V (25.2V pack voltage).
"Motor only" range 45-50 miles!
Range testing completed! Typically, I do pedal constantly. Partly to avoid attracting unwanted attention, NYS hasn't legalized eBikes, secondly for the exercise and thirdly, to extend range, (hardly seems relevant, with my exteeeeendeded! range.)
I bought my first eBike 3 years ago, my heart and health were in a pitiful state of neglect-suffering, (50 year old with sedentary lifestyle). I felt it necessary to exercise, with the safety of a way home, when I became "spent".
As my health rejuvenated, I continued to increase the bikes capability, as a manner to continually challenge myself.
With my 31.2ah Li-ion and my 26ah Lipo, I now have a trip range of 100mile, at about 20mph.
Of course, with pedal assist, that should stretch into 150, possibly 200 miles, at 20mph.
Yes, the EZip is designed to carry 2 battery packs
I hadn't expected it, but at my typical usage of .33C, It would appear, it is possible, to be getting, close to 100%, (of battery rated), efficiency from Li-ion 18650 cells! (97-98%+ of rated!)
Based on graph.
And! ... my maximum surge usage is still at, better than 92% efficient!
As performed by my 450w EZip Trailz
Li-ion 18650 cell,
31.2ah battery pack,
average speed of 18mph.
40-50 mile range - without pedal assist!
All my eBike project are done with the EZip Trailz model, Trailz & Mountain Trailz.
regearing the motor, for 25% additional speed
regearing from the oem 14-28T chainring 7spd freewheel to an 11-32T - for higher pedaling speed
better "roadworthy" tires
25.9v battery upgrade Li-ion - Lipo
Lights tail & turn signal
One of my EZips is regeared & 37volted to make it 30mph capable, of course, this does require heavy pedal assist, (450w motor@37v = 675w)
I think I have taken the EZips as far as possible.
My next "real" EBike will be an AmpedBikes hub kit build. 26" kit is 23mph capable @36v, but 48v rated (30mph?). They just upgraded to a 36-60v controller, with, presumably, motor comparable.
Would love to get a 700C front hub kit, and put it on my Haro Express Deluxe, but the wonderful suspension fork has alloy dropouts, which, supposedly wont hold up to a hub motor.
Oh, Might just take one of my spare EZip gear motors and drop it into the triangle of a bike and drop a chain around an inner front ring, producing a 7spd ebike!
Either I could add a 14T freewheel to the motor, or remove legs-pedals from crank, plus add footpegs ... somewhere.
Of course, still in the offing is an etrike
conversion. Schwinn Meredian with eZip motor added. Nice cargo space and hanging big SLA batteries below the rear axle will greatly increase stability.
"Schwinn Meridian Adult Tricycle"
Front hub motor would work, but In prefer the re-gearing ability of the EZip gear motor.
I've had many requests as mobility devices for nearby Senior housing project.
Also, I have been recycling 35ah SLA batteries, from the same seniors, using the BatteryMinder rejuvenation process, fairly good success rate of restoring battery capacity-capability.