Ezip 750 Scooter, go from 24v to 48v, what speed?

[imorton]

Hello Everyone, I have a question that you may be able to answer for me. I have a Ezip 750 scooter running two SLA 24v 12Ah battery packs in parallel. With 24Ah SLA's, the range isn't bad, yet the speed is the same @ 12-13 mph

I am looking at modding it and am considering changing the motor to a brushed 48v 1000 watt, go to a 48v controller, and change the throttle to a 48v. The cost for all of this from TNC seems to be @ $200 plus shipping.

Now for batteries, when the SLA's die, I see that Lipos from Hobbyking is the way to go, and I can get 48v 10Ah Lipo's for @ $200, plus a Lipo charger for @ $100. I see that 10Ah is not a lot, but I can always double that at future date.

The question is what speed increase would I see from going to a 48v 1000w motor and 48v controller, would I double it? EX: currently get 12-13mph, would I go to @ 22-25mph?

Hopefully someone here has some experience and numbers to share with me… IAN…

 

[sk8norcal]

edit: nevermind

from what i read, 48v will get u 30mph,

FAQ here,
http://forum.modifiedelectricscooters.com/viewforum.php?f=2
http://forum.modifiedelectricscooters.com/viewtopic.php?f=2&t=81

 

[imorton]

edit: nevermind

from what i read, 48v will get u 30mph,

FAQ here,
http://forum.modifiedelectricscooters.com/viewforum.php?f=2
http://forum.modifiedelectricscooters.com/viewtopic.php?f=2&t=81

My current setup is the OEM motor, 24v 750 watts, but i have two battery packs in parallel for extra range, therefore two packs of 24v 12Ah x 2 = 24v 24Ah's total.

I could run 36 volts to my 24 volt motor, (need to change my controller) and reconfigure my SLA battery packs to give me 36 volts. But i am curious as to what speed increase I will see. My current 24v motor is rated at 2600 rpm, so I presume running 36v thru it will make it spin at 3900 rpm?

That would in theory increase my speed by 50%, so 12-13 mph to a 36v speed of @ 18-19 mph, is this correct?

 

[sk8norcal]

yup,
try running 36v now with ur sla.
ur controller might not let u though...

 

[imorton]

yup,
try running 36v now with ur sla.
ur controller might not let u though…

Thanks for the reply…

I should try to run 36v temporarily now to see what happens.
I also read somewhere that the "newer" Currie scooter controllers don't allow voltage above 29v…

 

[imorton]

Did a temp installation/test with 36v and it spins the wheel. I haven't taken it out for a road test, but I imagine it will run.

I guess I will have to watch PEAK AMP LOADS like sudden full throttle starts or full-throttle hills?

Any tips for longevity, speed, reliability, and heat?

 

[sk8norcal]

i don't think so,
your controller limits the max amp.

i never fully understand the 24v/36v/48v throttle.
aren't they same or r they actually differeent?

r u trying to climbs hills?
typical distance of ur ride?

 

[imorton]

My tests on 36v show that it now draws 1035Wp and 30Ap and does @18mph.

My rides are generally 5-8 miles, and just small local hills, nothing really steep.

Since I have two 24v 12Ah SLA packs in parallel, I wonder if I can do 48v reliably by wiring them in series?

 

[dnmun]

open up the controller and take some pictures and read the values of the capacitors and the mosfets and find the voltage regulator and input power resistor.

 

[imorton]

open up the controller and take some pictures and read the values of the capacitors and the mosfets and find the voltage regulator and input power resistor.

Dnmun, thanks a million for the reply, and as soon as it stops raining, I'll open up the controller and take photo's of those items. It's the stock Currie Ezip 750 scooter controller, so I don't know if it just wouldn't work on 48v or blow a component?

But there is something that intrigues me, even if the controller could handle my two battery packs in series, could the 750w 24v motor handle 48 volts?

Any clues? IAN

 

[imorton]

I tried opening up the controller and it is full of epoxy sealer. Not much for me to see there unfortunately.

Here's a pic of the controller, XK-022C

Anybody have any real-world experience with these?

 

[imorton]

I wonder if my current 24v 750w motor #XYD-6B would handle overvolting to 48v without destroying itself?

IAN…

 

[sk8norcal]

from that FAQ link i posted,
they recommend not to go above 1.5X ur current V when overvolting.... so u wouldn't melt ur motor.

 

[imorton]

from that FAQ link i posted,
they recommend not to go above 1.5X ur current V when overvolting…. so u wouldn't melt ur motor.

Hmmmm, so my current 24v motor shouldn't be overvolted above 36v, so that solve one of my "upgrade options". No need to go to 48v

I tested it with 36v and it runs 18mph and the motor doesn't get hot. So I will try to change the motor and axle sprockets to get some more cruising speed. Any tips?

IAN….

 

[wineboyrider]

Try 36 volt first I get 27 mph on my ezip 650 hehehe.
The motor takes 10s lipo really well..

 

[wineboyrider]

I don't know for sure if you have the same motor etc. as I do , but it hardly get's hot on my 4 mile round trip at 10s lipo..... I had a currie ezip mtn trailz that got smoking hot on the same trip..... :wink:

 

[Green Machine]

can anyone give me the dimensions of the battery box...how large a battery can i fit in an izip 750? Is there a model with a larger battery box?

 

[Johnny B]

You are talking about a lot of speed on a frame that doesn't have much suspension. I have an eZip 750, love it, just wouldn't want to hit a bump going fast. I over-volted a Schwinn s750 and it is a much nicer ride. Longer frame, rear suspension. http://endless-sphere.com/forums/viewtopic.php?f=35&t=59023

 

[torqueboards]

How's the schwinn uphill? I know, I asked you about the eZip last time.

 

[sk8norcal]

can anyone give me the dimensions of the battery box...how large a battery can i fit in an izip 750? Is there a model with a larger battery box?

Hi Eric,

I actually wanted to pick up an ezip 750 before, its got front suspension. but never test rode it, seen it going for cheap on CL. (my Charly sit down scooter doesn't have front suspension, and therefore real rough ride on 10" wheels)

They seem to have the best quality of the mass produced low price scooters.

The battery box should be for two 12v12ah sla battery.

The full suspended model (ezip 1000) uses three smaller 12v10ah sla battery.

btw the ezip 1000 is the same as that schwinn s750.

 

[Green Machine]

Does anyone have dimesnions of the 36 volt battery pack or the 24 volt battery pack that go in this scooter?

I am trying to determine if one of my lithium packs will just fit in one of these scooter before buying one.

 

[Johnny B]

The Schwinn s750 was built as a 36v chain drive, the Schwinn Stealth s1000 is a 36v gear drive, the eZip 1000 is a 36v gear drive.

My over-volted 24v motor 36v battery Schwinn s750 chain drive is a hill climber equal to or better than a stock eZip1000. It climbs pretty good, but it drains the battery.

I have both battery packs, here you go.

eZip 750 24V pack dimensions: 12" L x 4.25" H x 4.25 W"

eZip 1000 36v dimensions: 14" L x 3" H x 6" W

 

[Green Machine]

Ok got it...thanks so much. Is that a maximum size that both battery packs can be in all dimensions? Is there any wiggle room?

 

[Johnny B]

There is wiggle room. The actual compartments measure:

eZip 750: 12 1/2" L x 5" W x 4 3/8" D

Schwinn: 15 3/4"L x 7 3/8 W x 3" D

In the pictures I have some sponges as padding at the top of the Schwinn compartment. The battery slides under the back fairing a bit.

 

[Green Machine]

I am making some lithium battery packs to go with my 1000 watt schwinn/currie.

I am not sure if they will put out enough amperage..i figure i can fit a 36 volt 20ah pack, and i am hoping to get 50amps out of a pack which will have an unlimited output bms.

Has anyone else tried upgrading one of these things to lithium? 36 votl 20ah pack will give me some real range and weigh a lot less than the stock pack.