48v battery to 36v motor ?

[Shockwave]

Hey everyone, I'm building another custom ebike, I already have a 48 volt 20 amp hour battery, the new kit I'm wanting to use for this new bike is a front hub motor 350 Watts 36 volt, it comes with its own controller and everything, I'm just wanting to save money and not buy another battery and use my current 48 volt battery. Is that just a plug and play? It's a lowrider bicycle so I'm not looking to go fast with it, I just want it electric. Thank you for any help you can provide

 

[James340]

I recently bought 2 conversion kits and they have voltage options from 36 to 72 volt. You select the voltage in the controller settings. The motor doesn't care but it does go faster/higher rpm with higher voltage

 

[fill]

The motor will handle the extra volts ok but unless its a dual/multi voltage controller a 36v controller/display combo supplied with a 48v pack may not fair as well.
If the higher than expected supply voltage doesn't brick the display/controller unless capped via config the potential amp output will undoubtedly fry the mosfets.

Then if it does work ?? there is the dangerous 31v? low voltage cut off.

 

[Shockwave]

Thanks guys, and here is the wheel I'm wanting to use my 48v battery for...

Amazon.com : CUBELLIN 36V 350W Electric Bike Conversion Kit 26" Front Wheel E-Bike Motor Hub Motor Set 5 Speed Adjustable 35 Km/H Electric Bicycle Kit with LCD Display Controller : Sports & Outdoors Amazon.com : CUBELLIN 36V 350W Electric Bike Conversion Kit 26" Front Wheel E-Bike Motor Hub Motor Set 5 Speed Adjustable 35 Km/H Electric Bicycle Kit with LCD Display Controller : Sports & Outdoors

 

[fill]

That ad is low on details/specs for the controller in the kit bundle. any details are inferred only based on battery voltage and the speed expectations.. not even a helpful photo of the 'silver box' label ;(

Imho source a kit that provides details about its bundled controller (input voltage range if applicable? and peak output are the minimum necessary details..)

The peak amp draw a controller will demand should be below the max draw your battery pack bms can supply with ?? a minimum 10% clear overhead?? ( thats a 3rd metric in Amps, not amp hours)

for a 350w motor supplied with 48v i would suggest a 20-22a peak output controller should provide ample speed/power without frying the motor with excess heat.

OR- just select a 48v kit, it will be cheaper than a 36v kit and an extra $100 ? controller/display combo

 

[fechter]

Some controllers are made to take more voltage, but the display will probably not read the battery level correctly. It would be worth it to get a kit made for 48v and save a lot of headaches later.

 

[E-HP]

Thanks guys, and here is the wheel I'm wanting to use my 48v battery for...

Amazon.com : CUBELLIN 36V 350W Electric Bike Conversion Kit 26" Front Wheel E-Bike Motor Hub Motor Set 5 Speed Adjustable 35 Km/H Electric Bicycle Kit with LCD Display Controller : Sports & Outdoors Amazon.com : CUBELLIN 36V 350W Electric Bike Conversion Kit 26" Front Wheel E-Bike Motor Hub Motor Set 5 Speed Adjustable 35 Km/H Electric Bicycle Kit with LCD Display Controller : Sports & Outdoors

It appears to use an S861 display. That display works with 24V/36V/48V, and some versions include 60V. They are paired with some off brand controllers for ebikes and scooters. If you find them in a kit, frequently the controllers are 36V/48V. You might be able to look at the components inside to rule out 48V if you check the caps. If the caps are good, you'd need to check the MOSFETs to make sure they could also take the additional voltage.

 

[Shockwave]

Thank you everyone, I was trying to do this the cheapest possible since I already had the 48 volt battery, but like you all said, just to be safe I'm going to go with a 48 volt front wheel kit for about $100 more. Just For Peace of mind. Thank you very much for your help