I am switching from SLA to NiCad on my e bike. I have a 48v controller, what options do I have? Thanks for having me!

Do I have to have exactly 48v of batts or can I use maybe 2 18v nicads? I was a music major, so when you guys and gals start using formulas to come up with amps, voltage. horsepower it blows me away.  Any information on where I could learn the basics would be appreciated.

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jongscx5 years ago
I'd say the best way to get a good answer to this is to ask some more questions, namely what model e-bike and what model firestorm.

The reason I ask is whether it would be possible/feasible to swap out the systems. Yes, the firestorms are smaller and lighter, but this might also mean they can't carry as much electricity (capacity). So you CAN have the bike run off of them, but you won't go as far...
You can use less volts, but you won't get the same final power at the wheels. I'll be very surprised to find a Ni-cad bank that can achieve the power density of SLA. Steve
jackdullboy (author)  steveastrouk7 years ago
Thanks for responding. The 18v firestorm batteries are much smaller and lighter. Also I happen to have 3 of them so I was wondering if I could put them to use on my bike. So I guess I have 54v, but will that work with the 48v controller. By your response it sounds like NiCads may not be good for Ebike use. Thanks again for your time! Phil
Hi Phil, No they won't be as good as SLAs The best tech is "Lithium-ion" or "Lion" batteries, but they will be really expensive. Steve
jackdullboy (author)  steveastrouk7 years ago
Thanks to all of you for your help. If I had done about 5mins of research, you could have avoided my stupidity. Actually I do know the very basics of AC and DC, my father was a designer/engineer at GE. In the 70's he and a man named Bob Dixon invented a DC to DC converter (I only met one person in my life that said "wow" and knew what it was) Dad never talked about it. Of course it is surely obsolete now. He got a patent, but GE got all the $$. Oh well. Again, thanks so much. I love forward to future corespondence.
lemonie7 years ago

Why are you swapping to NiCd?

L
jackdullboy (author)  lemonie7 years ago
Thanks for responding. The 18v firestorm batteries are much smaller and lighter. Also I happen to have 3 of them so I was wondering if I could put them to use on my bike.

That's sound thinking, but you've got to be sure they're up to the job. On the SLA it should have a rating in Amp-Hours AH, ditto the NiCds. Lead-Acid cells are good for high currents and storage, this is why road vehicles use them - it's not for the radio, lights etc it's for turning the engine over on a start.
What motor does the bike have?

L
seandogue7 years ago
"I was a music major, so when you guys and gals start using formulas to come up with amps, voltage. horsepower it blows me away. "

I would strongly advise you to contact the makers of your bike to have them recommend appropriate power supply sources for your electric bicycle

Your self-acknowledged technical illiteracy and ignorance makes me think that you need a sales engineer. They will tell you how to make it go in words that are suitable to a "music major guy or gal" and are in fact paid to do so.