DrkAngel
1 GW
Samsung ... mostly all gone, just a few left at higher price.
You snooze ... you lose!
You snooze ... you lose!
the chain tight as a banjo string is not the way to run a chain, a belt maybe.
Samsung ... mostly all gone, just a few left at higher price.
You snooze ... you lose!
latecurtis said:As the Hub Motor Turns and the LiPo Fire Burns. one mile per cell.
Will the new pack go 20 miles with 20 cells ?
NO. I can answer that. Maybe 2 miles if lucky.
What I want to know is are there any LIFEPO4 cells that can do one mile per cell and if not how about 1/2 mile a cell ?
How many cells for 50 miles at the lowest price possible.
Best bang for a buck. lol. Not really rocket science.
For example if a box of 80 cells in rows of ten can go 50 miles for $135 then is better than 100 cells for 50 miles at same price or $10 cheaper. I just want the highest capacity cell for the less money. hard to google that.
Please let me know if possible mabye a link. Thanks.
LC out.
Bike with reasonable roadworthy tires at good pressure.DrkAngel said:Everyone likes more speed!
Well ... most everyone.
What most don't realize is the cost of more speed.
Pulled from the ebikes.ca simulator, I noted the various ranges supplied at different speeds.
Generic Mountain bike - motor only.
665w peak output motor w/48V 10ah (480Wh) battery = similar to a 24V 450w peak output eZip motor - pushed to 36V 675w peak output motor.
Anyway
10mph = 46 miles range - 10.4wh/mile
15mph = 30 miles range - 16wh/mile
20mph = 20 miles range - 24wh/mile
25mph = 13 miles rang - 37wh/mile
30mph = 8 miles range - 60wh/mile
If you travel the same long route on a regular basis ... make a friend along the way.
Stop in for a quicky ... recharge.
eBike forums, clubs or registry?
Help set up a recharge network.
Metricilated 'er up fer ya ...
Generic Mountain bike - motor only.
48V 10ah Lithium battery = 480wh
10mph = 46 miles range ........ 16kph = 74 Kilometer range - 6.5wh/km
15mph = 30 miles range ........ 24kph = 48 Kilometer range - 10wh/km
20mph = 20 miles range ........ 32kph = 32 Kilometer range - 15wh/km
25mph = 13 miles range ........ 40kph = 21 Kilometer range - 23wh/km
30mph = 8 miles range ........ 48kph = <13 Kilometer range - 37wh/km
Remember ...
It's not just, how far you go ...
It's also, how go you far!
Most are shocked at the affect wind resistance plays.
Wind resistance is the major factor, but road load, tires, drive train etc. also contribute.
Makes me reconsider a lot!
Do I need 30mph capability? Nice to have it but ... don't need to use it! - OK! - Still a go.
Road Style bike with high pressure tires and crouched position? - Working on one!
Motor only, crouched behind an Aerodynamic fairing? Sounds almost essential - for sustained 30mph! - Battery pack mounted between bars and fork is a partial fairing. I'm sure I could easily enhance that!
Fortunately, I tend to cruise at 15mph, commute at 20mph with only very limited bursts nearing 30mph.
I'm even considering not upgrading (choke) my latest eZip Trailz LS.
(I use 3 eBikes + latest eZip, + building a road version and an eTrike ... also.)
OEM configuration is limited to 15mph in TAG (Twist And Go) mode and ~10mph in PAS (Pedal Assist System) mode.
Well, not upgrading, till after I run a range trial with my prototype 22.2V 40Ah pack.
I will add high pressure 1.75" tires for less rolling resistance and comfort seat and suspension post ... <15mph range trial might mean 5+ hours in the saddle!
And that jibes with my practical test and estimate of about 7 miles for one of these packs ... if you take it easy.
latecurtis said:And that jibes with my practical test and estimate of about 7 miles for one of these packs ... if you take it easy.
Thank's guys. I will be taking it easy with the 800 watt 20" hub motor on the back of the cargo bike and with the Currie also.
I will also get two more packs of the same if these two I ordered work out.
However It will be two packs in parallel to one 1,000 watt Unite motor on the front and the two other packs to an 800 watt 36V Unite motor on the back which is my next build.
I will calculate power and speed now.
1,000 watts / 48 = 20.83 * 42 = 875 watts for front motor.
800 watts / 36 = 22.2 * 42 = 933 watts for the rear motor.
Total power = 1,808 watts which should work well for 35 mph gearing. Of course by summertime I will have a custom built pack capable of putting out about 54 volts which should give me around 41 to 42 mph.
20.83W * 54 = 1,124W + 1,198W = 2, 322 watts with a 54 volt battery pack. Thanks.
LC out.
PS. No pedal chain and the pigs can catch me if they can. I'll be the ginger bread man. :lol: :lol:
DAND214 said:Please check your math. 36v is not 48 and the 36v packs are not 42v. All is done at nominal voltage not full charge voltage.
Why are you so stuck on those obsolete LiFePo4 cells? 10 cells is not a 36v pack or a 24v pack. As you posted it's 32v, which is in between 24 and 36 whiich is a strange voltage to find a charger for.
Yes, your charger will charge Li-ion cells.
Use those packs as others have suggested and they will work fine, IF you don't they will FAIL.
Dan
latecurtis said:I know now from what I learned here and from running LiPo that if I would have used them up those hills even though they may have made it there would have been a considerable amount of sag in voltage and several miles of future use would have been lost. Needless to say 1/3 mile of walking probably extended the battery life at least 10 miles longer. The correct choice. Thanks.
LC out.
Probably no chain.wturber said:latecurtis said:I know now from what I learned here and from running LiPo that if I would have used them up those hills even though they may have made it there would have been a considerable amount of sag in voltage and several miles of future use would have been lost. Needless to say 1/3 mile of walking probably extended the battery life at least 10 miles longer. The correct choice. Thanks.
LC out.
I'm not sure what your disability is or if it precludes strenuous pedaling, but that situation can be a good reason to have a "granny" gear available on your e-bike - either a very large rear gear, a small front chain ring option, or both. It is why I didn't get rid of my inner chain ring and still run a 7 speed freewheel. I can crawl up a pretty steep hill at a slow pace under my own power if I must. Of course, walking is a decent option as well. Just a little slower.