How far will i go?

[Addicted]

I could use some help figuring an estimated range for my first build.I have a Xlyte 5303 and a 4840 controller on the way soon,and they are going on a mountain scooter with 20 inch wheels.I will be buying a duct tape battery to power it,48v 20Ah to start,i plan to add one more later but would like to know about how far i will get with the one battery.

I live in Ma where It's not to hilly,mostly flat with small grades.


Jason.

 

[swbluto]

I'm not entirely sure what the wh/mile figure on the 5303 on 20 in. wheels are but assuming somewhere around 25-40 wh/mile for a non-human-powered scooter and the 960 watt-hours of the battery(48V*20Ah), you could expect somewhere between 38.4 to 24 miles, depending on how hard you run it. It depends on how quickly you accelerate, your controller's amp rating and what your coasting speed is: Generally, the greater any of those variables are, the shorter the range you can expect.

Using ebikes.ca's simulator, it also seems like you might expect a flat-land top speed around 31-34 mph.

 

[Addicted]

Wow,that sounds better than i expected.That will hold me overfor sure untill i run 96v.

Thanks,i'm going to look at that simulator you mentined.

Jason.

 

[Link]

Yeah, I'm guessing around 30 miles. I know my 20Ah pack will take me that far, regardless of whether or not I pedal.

 

[swbluto]

Yeah, I'm guessing around 30 miles. I know my 20Ah pack will take me that far, regardless of whether or not I pedal.

Wait... what kind of motor do you have? My motor seems to get 20 wh/mi which seems to vary little if I pedal(It actually lowers it to about 17 wh/mi but not an appreciable difference) and your 960WH battery should then get me about 48 miles which is just a bit more.

 

[Link]

A Golden Motor. I've estimated that it would take me 60 or more if I both pedaled normally and didn't use full speed (i.e. actually used it as assist rather than primary motive power 8)). But, I'd rather not ride that long, and I like to be conservative in my range estimates.

Either way, I'd say he's got more range than he'd want to use.

 

[Drunkskunk]

Seems like a good estimate to me. Might get further if you ride slower. Might get less if you like to ride hard. I've found I get board of riding after 15-20 miles.

 

[dogman dan]

Here I go again. Even the new Ping batteries may be a bit under the c rating you need for the big x5 chrystalite motors. I'm glad you are at least buying the 20 ah, but talk to Ping about the wattage before you buy a battery and take his advice. No sense in paying a lot and then getting a battery you may hammer to death. Lots of the battery problem guys run these big motors and controllers. The new ping cells are supposed to be better, but you may need to wait for the new bms that is in the works. 48v x40 amps is 1920 watts, I don't think Ping is reccomending his batteries for that yet. Once the new bms comes out and you can more safely parralell or series connect, two batteries of 20 ah size would be a safe for the battery setup. That way each one carries 1000 watts. By then range will be till your butt can't take it. Or the motor melts, been there done that.

 

[Addicted]

Here I go again. Even the new Ping batteries may be a bit under the c rating you need for the big x5 chrystalite motors. I'm glad you are at least buying the 20 ah, but talk to Ping about the wattage before you buy a battery and take his advice. No sense in paying a lot and then getting a battery you may hammer to death. Lots of the battery problem guys run these big motors and controllers. The new ping cells are supposed to be better, but you may need to wait for the new bms that is in the works. 48v x40 amps is 1920 watts, I don't think Ping is reccomending his batteries for that yet. Once the new bms comes out and you can more safely parralell or series connect, two batteries of 20 ah size would be a safe for the battery setup. That way each one carries 1000 watts. By then range will be till your butt can't take it. Or the motor melts, been there done that.

I will contact Ping and see what he says about this.Thanks.

Jason.

 

[ZapPat]

I have one of Ping's new 48V 20AH packs, and I tell you that for "cheap" lithium, this guy is your doctor to go to for an uplift! So far I've pulled 35 amps out of it while riding up hills and accelerating, with no problems at all. Very slight heating of the cells, and a bit more heat coming from the cutoff FETs on the BMS, and very little voltage sag: 0.13 Volts per Amp of current drain. This puts Ping's Ver2 packs them slightly ahead of Headway's offerings, who are not seeming to live up to thier specs so far.

I have yet to drain them over 10Ah yet, so only half capacity used so far. Even after this, the voltage was still around 52V unloaded! The minimum voltage point logged during this trip was 47.9V while drawing about 35.5 Amps, or about 1700 Watts. So far I'm very satisfied! I've boosted a small scooter I have been given, and it seems I will be able to go about 40km if the battery lives up to it's claimed capacity (yet to see).

I've charged the battery at 6 amps using a vicor DC converter and the pack stays cool to the touch - but the BMS doesn't! It's only the protection FETs at the end of the BMS heating up, but not badly since I can touch them without discomfort. Works great! I'll post some discharging and charging curves I've logged on the ping v2 thread later.

 

[Addicted]

I have one of Ping's new 48V 20AH packs, and I tell you that for "cheap" lithium, this guy is your doctor to go to for an uplift! So far I've pulled 35 amps out of it while riding up hills and accelerating, with no problems at all. Very slight heating of the cells, and a bit more heat coming from the cutoff FETs on the BMS, and very little voltage sag: 0.13 Volts per Amp of current drain. This puts Ping's Ver2 packs them slightly ahead of Headway's offerings, who are not seeming to live up to thier specs so far.

I have yet to drain them over 10Ah yet, so only half capacity used so far. Even after this, the voltage was still around 52V unloaded! The minimum voltage point logged during this trip was 47.9V while drawing about 35.5 Amps, or about 1700 Watts. So far I'm very satisfied! I've boosted a small scooter I have been given, and it seems I will be able to go about 40km if the battery lives up to it's claimed capacity (yet to see).

I've charged the battery at 6 amps using a vicor DC converter and the pack stays cool to the touch - but the BMS doesn't! It's only the protection FETs at the end of the BMS heating up, but not badly since I can touch them without discomfort. Works great! I'll post some discharging and charging curves I've logged on the ping v2 thread later.

That seems pretty close to what i will be running,maye I'll just take a chance and go for it.Thanks for the info on your set up!

Jason.