Run my 36v motor at 48v?

[lotrwiz]

So my 36v water bottle battery is probably messed up, and I want to upgrade to more volts anyway, do you think if I got a new controller (obviously) that I could run my exisiting 36v 250w brushless front hub, at 48v instead?

Or if I need to upgrade the throttle and things, am I best off just getting a 1000w 48v rear wheel kit with everything included?

Thanks a lot, Lotrwiz

 

[rich43]

Yes, I run my 48v motor at 90+ volts.

 

[lotrwiz]

Yes, I run my 48v motor at 90+ volts.

Okay

well my main thing is I want more oomph, am I better off just getting a whole new 1000w kit, as my motor is pretty weedy?

 

[rich43]

Yes, I run my 48v motor at 90+ volts.

Okay

well my main thing is I want more oomph, am I better off just getting a whole new 1000w kit, as my motor is pretty weedy?

You wont be saying that with a big heavy 1000w motor on the back, so sounds like a good plan. I have a cheap 1000w kit from ebay, blew the stock controller on a long ride. Replaced that with a 72v 45a controller and now it will pull a wheelie from a stand still and hauls ass up to 40mph!

Just make sure you get plenty of lipo power on that bike to compensate, at least 10ah (about twice that if your using 18650 cells).

Edit: you could soup up your front hub motor a bit, but i wouldnt push it too much. I wouldn't push it more than 500w. Rear dropouts can cope with more power, I have heard of powerful hub motors breaking front forks.

 

[lotrwiz]

Okay, thanks

I was thinking of getting one of these Batteries: http://www.ebay.co.uk/itm/2013-48v-15ah-LiFePO4-Battery-5A-Charger-BMS-For-Ebike-Kits-Powerful-7-8-Weeks-/141046282775?pt=AU_Electronics_Batteries_Chargers&hash=item20d7037a17

And one of these kits: http://www.ebay.co.uk/itm/Electric-Bicycle-E-Bike-Conversion-Kit-48V-1000W-Brushless-Motor-Rear-Wheel-Rack-/170939207305?pt=UK_Bikes_GL&hash=item27ccc54e89

does that sound decent?

 

[rich43]

Okay, thanks

I was thinking of getting one of these Batteries: http://www.ebay.co.uk/itm/2013-48v-15ah-LiFePO4-Battery-5A-Charger-BMS-For-Ebike-Kits-Powerful-7-8-Weeks-/141046282775?pt=AU_Electronics_Batteries_Chargers&hash=item20d7037a17

And one of these kits: http://www.ebay.co.uk/itm/Electric-Bicycle-E-Bike-Conversion-Kit-48V-1000W-Brushless-Motor-Rear-Wheel-Rack-/170939207305?pt=UK_Bikes_GL&hash=item27ccc54e89

does that sound decent?

Yeah, thats very similar to the one I bought. Mine has that swirly hypnotic pattern on the side
That battery is a nice find too, I use hobbyking lipo @ http://hobbyking.com/hobbyking/store/__32162__ZIPPY_Flightmax_5000mAh_6S1P_20C_UK_Warehouse_.html
Just be careful with any high powered ebike battery, they can be a fire hazard. So charge them on a concorete surface or somewhere where fire isnt a problem. (I have special fire proof bags) It's a rare event but it has happened to some other members on here.

 

[lotrwiz]

Okay, thanks

I was thinking of getting one of these Batteries: http://www.ebay.co.uk/itm/2013-48v-15ah-LiFePO4-Battery-5A-Charger-BMS-For-Ebike-Kits-Powerful-7-8-Weeks-/141046282775?pt=AU_Electronics_Batteries_Chargers&hash=item20d7037a17

And one of these kits: http://www.ebay.co.uk/itm/Electric-Bicycle-E-Bike-Conversion-Kit-48V-1000W-Brushless-Motor-Rear-Wheel-Rack-/170939207305?pt=UK_Bikes_GL&hash=item27ccc54e89

does that sound decent?

Yeah, thats very similar to the one I bought. Mine has that swirly hypnotic pattern on the side
That battery is a nice find too, I use hobbyking lipo @ http://hobbyking.com/hobbyking/store/__32162__ZIPPY_Flightmax_5000mAh_6S1P_20C_UK_Warehouse_.html
Just be careful with any high powered ebike battery, they can be a fire hazard. So charge them on a concorete surface or somewhere where fire isnt a problem. (I have special fire proof bags)

I love that pattern! Well to get that kind of 72v setup, like you have, do you have a link to how to set them up with bms's and charging and all that? I understand it in principle, but I've never actually created a pack like that before.

 

[rich43]

Okay, thanks

I was thinking of getting one of these Batteries: http://www.ebay.co.uk/itm/2013-48v-15ah-LiFePO4-Battery-5A-Charger-BMS-For-Ebike-Kits-Powerful-7-8-Weeks-/141046282775?pt=AU_Electronics_Batteries_Chargers&hash=item20d7037a17

And one of these kits: http://www.ebay.co.uk/itm/Electric-Bicycle-E-Bike-Conversion-Kit-48V-1000W-Brushless-Motor-Rear-Wheel-Rack-/170939207305?pt=UK_Bikes_GL&hash=item27ccc54e89

does that sound decent?

Yeah, thats very similar to the one I bought. Mine has that swirly hypnotic pattern on the side
That battery is a nice find too, I use hobbyking lipo @ http://hobbyking.com/hobbyking/store/__32162__ZIPPY_Flightmax_5000mAh_6S1P_20C_UK_Warehouse_.html
Just be careful with any high powered ebike battery, they can be a fire hazard. So charge them on a concorete surface or somewhere where fire isnt a problem. (I have special fire proof bags)

I love that pattern! Well to get that kind of 72v setup, like you have, do you have a link to how to set them up with bms's and charging and all that? I understand it in principle, but I've never actually created a pack like that before.

a) You have to solder your own series and paraell connector's, I use a 100w antex iron and 10 or 12 awg wire.
b) Make sure you add some 60a fuses in there too I am going to put one on each battery and on my paralell lead.
c) You will need a high powered charger to balance the batteries, I got this one on order: http://hobbyking.com/hobbyking/store/__39177__Turnigy_MEGA_1000W_8S_40A_Lithium_Polymer_Balance_Charger.html
d) For 72v, you can get a controller from: http://www.zenid.com/shop.htm
He's a member on here, i have met him personally in nottingham.
e) You will need a 24v power supply to power the charger, give whereswally606 on here a PM, he will sell you a custom server power supply.
f) To keep a close eye on your batteries, buy one of these: http://www.ebikes.ca/drainbrain.shtml
g) Watch all the money in your bank account disappear :-(

 

[lotrwiz]

Wow, maybe this is all a tad advanced for me... hmm. thankyu for the information though!

 

[rich43]

Wow, maybe this is all a tad advanced for me... hmm. thankyu for the information though!

Yeah, if you stick with standard 48v setup, it should be simpler and give you better range at full throttle. I got a bit greedy with horsepower :-/

 

[lotrwiz]

Wow, maybe this is all a tad advanced for me... hmm. thankyu for the information though!

Yeah, if you stick with standard 48v setup, it should be simpler and give you better range at full throttle. I got a bit greedy with horsepower :-/

Do you have a skype adress I can add you on, in order to chat a little? Or perhaps an email address? Please PM me with more info

 

[rich43]

Wow, maybe this is all a tad advanced for me... hmm. thankyu for the information though!

Yeah, if you stick with standard 48v setup, it should be simpler and give you better range at full throttle. I got a bit greedy with horsepower :-/

Do you have a skype adress I can add you on, in order to chat a little? Or perhaps an email address? Please PM me with more info

My skype is richie43
Just add me on there, I perfer instant messaging too I will show you pics of my bike if you like.

 

[spinningmagnets]

A lot of people have done this with success. I recommend adding a $2 temp sensor, and some type of read-out to monitor the temps, but...it is usually the amps that kill the smaller motors. The newer controller you want will likely be able to provide more amps. Resist the urge to hot rod and start out at 48V with the same amps. Slowly raise the amps maybe once a week, and monitor the temps during your common routes and top speeds. Don't let the stator get above 200F / 93C, and the motor should survive just fine.

If you want more power than this, maybe swap-in a Bafang-BPM and use a Cromoly fork with two drop-outs. If even that is not enough, add a second BPM to the rear, or a single MAC to the rear (all suggestions assume you require a geared hub on the front at a minimum).