EZip Trailz 36V Battery Upgrade

[MidnightRider]

Shortly after getting my EZip Trailz bike I upgraded it to use two 36V 10Ah batteries instead of the standard two 24V 10 Ah Currie packs. Below are some photos showing what I did on 3/18/12...

added 2 banana plug posts to wire in an external 3rd battery to each battery pack - 3/18/12

24V battery pack with negative & positive posts to add an extra battery externally - 3/18/12

bike with both 24V 10Ah battery packs - 3/18/12

storage container with external battery tray - 3/18/12

storage container with external batteries wired into each 24V battery pack giving 36V 10 Ah per battery pack - 3/18/12

electric bike upgraded to 36V 20 Ah with extra storage compartment - 3/18/12

[dumbass]

OK, now I see exactly what you did. Yeah, I can imagin the add-on storage does make you a little top heavy though. Have you considered putting the extra set of batteries on the top bar? Way back in my early days I rode with a 2 -24v 18AH lead packs on my top bar. IT wasn't an EZip bike though and the top bar was basicly level. I was supprised that the bike didn't handle as bad as I thought it would. In fact I'm moding this same bike to use an EZip 24v motor setup in the "V" running 48v (no I will not actually feed it with 48v though). I will power it with a set of 24v 20ah lifepo4 packs. The top of the packs are mounted level to the top bar. The motor BTW drives the left side of a Nuvinci hub through a second chain..

Bob

[dumbass]

I just noticed I had posted on this tread and given wrong information. When I was doing my last Ebike mod I said I was mounting a Currie 24v motor in the "V" and going to run it from a set of 24v 20ah packs but maintaining it at 24v. Well I never botthered going withthe 24v. I never went 24v with it. I had a 48v 50a controller sitting on the bench and used it. I only have a few hundred miles on it this way but it seems to work fine. I have a digital temp prob on the motor giving a temp reading on a gauge on my top bar. If the temp gets to 150F I lighten the throttle. It has great eff, torque and speed with this setup. And I did do a direct drive through the Nuvinci hub. I can generally run the local trails for about 30+ miles before the packs start pooping out. They are starting to show their age and I'm only getting about 14.5ah out of them now.

Bob

[MidnightRider]

This is the charger I ordered from BatteryStuff.com to charge my 36V setup...
36v 4 amp charger by Japlar
http://www.batterystuff.com/battery-cha ... 1-102.html

[dumbass]

I hate to bust your bubble but that charger is to high of amperage for your pack. I know it's nice to recharge fast but there is a reason why Currie uses a 1.5 or 1.8a charger on the 10ah packs (that you have). It's because the max recommended charge rate for lead is .25 of the ah rating. Therefore, a 10ah pack should not exceed 2.5a. So you may find that you shorten the packs life charging at 4a.

Bob

EDIT: After re-reading the specs I noticed the charger is supposed to adjust current based on the AH rating of the pack. Hopefully it actually does this and will lower the amperage to below 2.5a max. Might want to call them if you can.

[V_Mark]

Looks well done. When I had an Ezip (2007 or 2008 model) it could take 36 volts with the stock controller. I ordered an empty battery case off of ebay and put a 12v10ah SLA in there and ran that in series with the original pack. For charging, I disconnected the series connection and charged with separate 12 and 24 volt chargers. I got rid of it a couple of years ago, but the thing really flew on 36v, with the catch of it being noisy.

[dumbass]

Looks well done. When I had an Ezip (2007 or 2008 model) it could take 36 volts with the stock controller. I ordered an empty battery case off of ebay and put a 12v10ah SLA in there and ran that in series with the original pack. For charging, I disconnected the series connection and charged with separate 12 and 24 volt chargers. I got rid of it a couple of years ago, but the thing really flew on 36v, with the catch of it being noisy.

You should have tried i on 48v.....of course the controller would have needed replacement.

Bob

[littlebear72_91]

Does anyone know the amp limits of the stock controller? Sound like 36 is the limit for voltage.

[V_Mark]

Does anyone know the amp limits of the stock controller? Sound like 36 is the limit for voltage.

They switched out the controllers a few years ago. The older ones could take 36v with no issues. The new ones can't.

[dumbass]

V Mark is correct. In "09 they modified the controllers to stop people from overvolting them. The max voltage from early "09 was aprox 29.2 to 29.6v. In any case the US sold bikes have a 24v 35a controller. The older controllers were the same 24v 35a but could be over volted till they went poof.

Bob

[littlebear72_91]

Great thank you for the info, I have an older bike (the blue one, bought it on craigslist) with a serial number starting out as "ACA"
I see that this site sells controllers http://www.monsterscooterparts.com/curr ... rials.html
This link leads me to believe that the "BM" serial numbers [url]http://www.currietech.com/dealers/wiki/index.php/File:Wiring_Diagram_-_RMB_with_SLA_Batteries_Bikes_(2009_USA_-_sn_DM)_rev2.png is the later controller

[etriker]

Great thank you for the info, I have an older bike (the blue one, bought it on craigslist) with a serial number starting out as "ACA"
I see that this site sells controllers http://www.monsterscooterparts.com/curr ... rials.html
This link leads me to believe that the "BM" serial numbers [url]http://www.currietech.com/dealers/wiki/index.php/File:Wiring_Diagram_-_RMB_with_SLA_Batteries_Bikes_(2009_USA_-_sn_DM)_rev2.png is the later controller

This place has controllers too. I have bought lots of stuff from them and they are ok.

http://tncscooters.com/index.php?route= ... ry&path=41

My new Currie kit has a 35 amp controller on it.

[dumbass]

Great thank you for the info, I have an older bike (the blue one, bought it on craigslist) with a serial number starting out as "ACA"
I see that this site sells controllers http://www.monsterscooterparts.com/curr ... rials.html
This link leads me to believe that the "BM" serial numbers [url]http://www.currietech.com/dealers/wiki/index.php/File:Wiring_Diagram_-_RMB_with_SLA_Batteries_Bikes_(2009_USA_-_sn_DM)_rev2.png is the later controller

By your earlier posting I had the impression you were looking to overvolt the system to 36v. If so why are you looking at a base 24v controller?

Bob

[littlebear72_91]

Bob I was trying to identify which controller I have to see if I could go to 36 volts and how many amps. Looks like the controller can do 36 volts and at least 20 amps

[dumbass]

Bob I was trying to identify which controller I have to see if I could go to 36 volts and how many amps. Looks like the controller can do 36 volts and at least 20 amps

Got ya.....Not trying to be a PITA but your numbers don't work out quite right. Why are you thinking you would get 36v 20a? That's only 720w and if you have a stock Currie controller (24v 35a) the stock controller would supply 840w. I'm thinking your stock controller running 36v would deliver a full 35a for 1260w. Otherwise, your taking a step backward. Of course all these numbers depend on the battery being able to support the load. And those 10ah lead packs just don't get it done so you kind of "get what you get" with them.

The nice thing about jumping to 48v is you can use the stock battery mounting for 2 packs. Of course the stock controller would need to be replaced. And of course you would need to monitor the motor's heat.

Bob