Using a 36V battery on a 24V bike

[Old Timer]

Not being up on batteries as much as mechanicals can I ask?

What would be needed in line to be able to use a 36V battery and drop the voltage down to 24V or there abouts? I realise that the draw can be fairly heavy so I suppose it would have to be fairly heavy duty?

 

[oigoi]

There are a couple of options:

1) A dc to dc converter, though I have not seen one to go from 36 to 24V, you might have to build your own.

2) A voltage regulator like a LM317. These can usually only handle 1 or 2 amps so you might have to use several of them in parallel to cope with the current. This is not a very efficient way though as they would have to drop the 12 volt reduction by effectively burning it off as heat, so they would need to be mounted on a good heatsink.

Hope this helps

 

[Fordulike]

Not being up on batteries as much as mechanicals can I ask?

What would be needed in line to be able to use a 36V battery and drop the voltage down to 24V or there abouts? I realise that the draw can be fairly heavy so I suppose it would have to be fairly heavy duty?

If yer on about using a 36v battery on one of your Cyclamatics, the controller can handle 24v/36v and 48v. Manufacturer LSDZS.
Might be worth trying it out with 36v, as i'm sure the hub motor can handle the increased voltage

 

[Old Timer]

If yer on about using a 36v battery on one of your Cyclamatics, the controller can handle 24v/36v and 48v. Manufacturer LSDZS.
Might be worth trying it out with 36v, as i'm sure the hub motor can handle the increased voltage

It is the folder as well as the plus! I had the folder controller out today and it states 24V with a cut off of 21V. Tony(onmebike) reckons the hub will take it but not sure about the controller.

 

[NRG]

The only way to be sure OT is to open the controller case and check the voltage rating of the capacitors and motor phase FETs, however even if all OK for 36v the LVC of 21v will be a problem...

 

[Fordulike]

I did e-mail LSDZS many moons ago and asked about their controllers.
They said the Cyclamatic one is just an older version of their current LSW70A Micro Controller.
It will run on 24v/36v and 48v.
Surely the BMS in a higher voltage battery would cut power at the threshold for battery protection?

 

[banbury frank]

Hi Old Timer

If you up the voltage then your bike will no longer be 250 watts road LEGAL

Power is Volts X amps so 24 volts X 10 amps = 240 watts

36 volts X 10 Amps 360 watts

48 volts X 10 amps 480 watts

also speed as motors run at RPM per volt so your speed increases as the volts do.

The motor is put under a high strain 36V should be OK 48 V OTT

This is just a friendly piece off information NOT A moan at you


Frank

 

[NRG]

I did e-mail LSDZS many moons ago and asked about their controllers.
They said the Cyclamatic one is just an older version of their current LSW70A Micro Controller.
It will run on 24v/36v and 48v.
Surely the BMS in a higher voltage battery would cut power at the threshold for battery protection?

BTW What's the current rating of your controller?

The BMS may or may not protect your battery it's entirely down to what is fitted, many only provide simple charge, balance and fuel gauge functions relying on the controller LVC...I suspect many of the lower priced batteries have a simple balance only type of BMS.