upgarade battery

[stesteste]

hello was thinking when it was time to upgrade my alien aurora battery which is 36v could I use s 48v battery without changing controller the bike is good at 36 just thought I could ry a different grin factor battery like this one
Check out this item I found on eBay: http://pages.ebay.com/link/?nav=item.view&id=140904013941
I will try find out what the controller is Thanks
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[NRG]

Pretty sure its been done, use the search function there is a thread or two knocking about with more details...

 

[stesteste]

yeh think i saw it before but he upgraded his capassitors just wondered if it would work just putting 48v battery on. thx nrg

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[banbury frank]

Hi we only use 48 volts and looked at the bottle battery's 48 volts BUT at 460 MM long it wont fit in the frame off many bikes The 36 volt is only 320 mm long

Frank

 

[Deleted member 4366]

I was going to say the same about the length, but I'd add that you also have to allow for the battery to be lifted out of it's cradle, so you need a massive 460mm plus enough room above it at the top end to lift it in/out.

I thought that the Arora is already quite fast. I have it at the back of my mind that it's a code 10 - good for about 24mph. What code number is written on the motor. If you could reproduce all the numbers here it would help.

Assuming it has the speed. I'd chuck that hideous battery/rack arrangement and get a 20aH 36v battery and KU93 controller from BMSBattery for about £280 and mount it like Saneagle's Kraken. Details in his build thread.

 

[NRG]

I think you are right Dave, 24mph at 36v....going to 48v would push is to 30mph or more.

 

[stesteste]

thx guys the bike does about 20 mph now will i gain a bit more mph by just installing a 36v 20ah battery if thats right i will order that thanks
sorry i dont have code number abit of wet and dry sandpaper rubbed it off with a 250watt plate over... sssssh dont tell

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[Deleted member 4366]

thx guys the bike does about 20 mph now will i gain a bit more mph by just installing a 36v 20ah battery if thats right i will order that thanks
sorry i dont have code number abit of wet and dry sandpaper rubbed it off with a 250watt plate over... sssssh dont tell

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I think that the standard controller is 18 amps, so it's a bit low for what the motor can give. To check the speed, you can get a cheap bike computer from Tesco and fit it temporarily on the back wheel, then you can measure the no-load speed. A more powerful battery and controller will give more pulling power, so it'll hold its top speed more easily. Which voltage you go for should depend on how hwavy you are and how hilly your journeys are. If you're light and not many significant hills, then you can use the speed advantage of 48v. Whatever battery you get, you should use the opportunity to uprate your controller to 22 amps.

 

[stesteste]

any recommendations (link) on 22 amp controller anyone, i still want my 3 speed option etc, thx
think my battery is 10ah 2c

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[Deleted member 4366]

KU93 from BMSBattery. Get it at the same time as your battery and it'll be very cheap - about £12. It has the three speed switch connector. If you go for it, when connecting, check that the throttle and PAS wires are in the same sequence (colour to colour). If not, remove the pins from the connector and swap positions. You could get this problem with any controller.