What battery to use for 1000watt 48 volt BHT?

[Hugh-Jassman]

I ned info about what battery to use for this BHT 1000w motor at 48volt

I don't know what controller to use yet, maybe a Lyen? or Kelley?

I was thinking about this green works pack that I saw on one o fhte threads. But it is only 40volts. maybe he reconfigured the packs to get the right voltage. But I think there maybe a better , larger battery out there some where??

48v 1000w BDLC motor production is stoped now, no stock

 

[dogman dan]

a single greenworks battery will struggle to put out 1000w continuous. Just too small. 1000 divided by 40 is 25 amps,, nearly 6c discharge rate.

But you don't tell us what the use will be. It might be 200w continuous, if you never travel faster than 10-12 mph.

 

[nutnspecial]

Hi Hugh, if you search out the handful of builds you might gleen some important info to start with.
Do you know how to search the site? I'd recommend searching and posting your results and your end conclusion in your thread(s) to help future builders. Perhaps a build thread?

I have no idea of your application or desired performance etc etc etc, but fwiw I use 16-20s of 30c turnigy lipo w/ an em3ev 18fet 4110 controller. The motor is happy for my application @ up to the 6.4 kw it's been fed. A good 18fet controller should be able to get to 9kw but I haven't tried that. . . yet.
My favorite setup so far is 20s geared for ~40mph w/ >80a battery and 200a phase. My GVW is <240lbs.

If you only want to use 1kw on the bike, I think the bht might be just a tad overkill (weight). Unless your duty cycle involves a really heavy bike climbing near vertically?

 

[Hugh-Jassman]

yes I figured oou thow to search endless sphere, through google.

the use of hte bike in question would be utilitarian only. only alittle hill climbing but up to 9% grade. I figure it should be geared for it even if the rest of the ride is slow.

give me some search words to look for. well maybe I wil think of some later.

 

[dogman dan]

Well, that sounds like less than 1000w continuous. A good ballpark figure to work with is try to carry enough battery to keep your discharge rate under 2c.

So for 10 ah size, that would be 20 amps controller ok. About 700 watts.

for 4 ah size, the size of a lot of lawnmower packs, that would be 8 amps. About 250 watts. Gear it low if you want to climb 9% with 250w. And because of the low capacity, 160wh, you won't climb 9% for very far.

 

[Hugh-Jassman]

great I will need to go to some place where I can do some serius research.....

I figured that a 9:1 ratio is good for 26 inch tire but I just got he word that this motor is oout of production, so I will have to start agian with a different motor:

Well, that sounds like less than 1000w continuous. A good ballpark figure to work with is try to carry enough battery to keep your discharge rate under 2c.

So for 10 ah size, that would be 20 amps controller ok. About 700 watts.

for 4 ah size, the size of a lot of lawnmower packs, that would be 8 amps. About 250 watts. Gear it low if you want to climb 9% with 250w. And because of the low capacity, 160wh, you won't climb 9% for very far.

 

[Hugh-Jassman]

Do you think an ebay kit is worth the money?

 

[Voltron]

I've got a BHT motor I might be selling... pm me if you want to talk about it.

 

[APailthorp]

Maybe, maybe not. You can get such a kit from one of the vendors that hang around these forums for maybe 50% more (look at the sig lines of some of the frequent responders), and if you have a problem, someone is far more likely to take the time to help you. With eBay, not so much.

 

[dogman dan]

Worth the money to do what? How can we tell you a thing if we keep guessing what you need to do.

Weight of the vehicle with you on it,, length of the ride, speed you plan to ride, grade of the hills.

Those are the questions I ask,, bear in mind,, I do this all day for my job. Without that info I cannot tell somebody if the kit my employer sells is going to be great, or suck badly for them.