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-   -   Sticky thread for batteries? (http://www.bikeforums.net/electric-bikes/370920-sticky-thread-batteries.html)

boatsoneel 12-01-08 09:47 AM

Schwinn Tailwind
 
There's not much info about the Schwinn Tailwind on their website. Looking at
the size of the battery and the "small" motor, it should be capable of 50 miles on a charge.

The 3000 charges they claim would be a world record beater for sure.

karma 12-02-08 11:35 PM

looks like ping has a webpage now http://www.pingbattery.com/servlet/StoreFront

alfonsopilato 12-03-08 10:52 PM

Quote:

Originally Posted by mostlybent (Post 6589525)
www.ebike.ca is a supplier of 24, 36, and 48 volt 12 AH batteries, and test them etc.

Yes, I have the same setup, with cycle analyst as well, have had the battery powering 408 motor for five months now, and just recently the voltage has been dipping far too early, way before I reach 12ah. In fact, the cycle analyst would cut off my battery at around 4 ah when my voltage dips below 42 volts. I contacted ebike.ca and like mentioned here, they will replace the BMS free of charge and they stated that the most likely cause is the old BMS not balancing the cells adequately.

They also offered to send the BMS replacement kit with instructions (http://ebikes.ca/BMS_Replacement.pdf) free of charge.

I like it.. i like it a lot!!! :D

tpreitzel 12-04-08 10:24 PM

I finally decided to write to FireFly Energy about the possibility of releasing a lead acid battery with their newer technology for bicycle use. Daniel Stewart of FireFly Energy responds:

"Thank you very much for your interest in Firefly Energy. I have to tell you though, that our technology is optimized for batteries with 25 Ah and higher capacity. Our first product, to be launched early next year, is a 100 Ah battery.

All this is to say that it's unlikely that we will produce a battery that will be applicable to electric bicycles in the foreseeable future.

Thanks again for your interest."


Time will tell, but Dan says bicycle users shouldn't hold their breath waiting for this newer technology from FireFly. ;)

Anki 02-20-09 12:32 AM

Battery Technology
 
Hi there,

seems here are some battery experts.

can anyone explain me how Lithium batteries for ebikes are composed? What kind of parts are in these batteries?..... Or where can I get such detailed infos?
A picture or a drawing would be very helpful, too.

Thanks to you.

Anki

Anki 02-24-09 09:13 PM

Great, thanks for your help... will have a look at these now!

:):):)

falconev 03-02-09 09:06 AM

Lithium packs
 
ONLY buy direct from china ?? Are you crazy ?
The only proven reputable suppliers are from china ?
what are you smoking ?
You suffer from 'cheap is always better syndrome'.
To instruct others to follow your ill advised "advice" without looking for sources here in USA
first is irresponsible.
There are other factors to consider besides price.

blind leading the blind, again

falconev 03-16-09 06:12 AM

Remember everybody,those " reliable" sources mentioned are just someones opinion, shared also by a few of the other uninformed on that forum that like to tinker and save a penny. My opinion is those three are NOT reliable.
Maybe ok for low power applications. I have all my cells lab tested before using them.
Lithium can be found here in USA if you look for it.

JinbaIttai 03-17-09 12:30 AM

Do not trust falconev's opinion on where not to buy batteries because falconev is a battery vendor!


He sells batteries in the United States that he imports from China!.

karma 03-30-09 07:26 AM

for anyone still using sla these guys have a good assortment of sizes and the prices are good.
in canada.

http://www.absolutebattery.com/

sauerleigh 04-19-09 06:29 AM

Another eBay source is "volgood". They still have 100% positive feedback and I'll be adding another. I bought two 36v 20ah lifepo4 batteries with DHL shipping for $848.00. So far no complaints. DHL was great, three days from Hong Kong to Ohio with no customs hassle.

sauerleigh 04-19-09 03:48 PM

I should mention that the operating voltage is just over 40v for a 36v pack. I had planned to use two packs in my Bricycle but my Crlyte controller is not happy on 80plus volts. I've been running a single 36v pack at 35a without any problems.

RustyBarnacle 04-20-09 02:58 PM

What is recommended for a trunk bag for a battery?

I got a 36V 18AH NiMH battery and a water resistant trunk bag. This morning was my first trip to work after putting it together this weekend and I think it over heated. I had the controller in the bag as well and it was almost too hot to touch and the battery has little holes in the heat shrink where I think most of the tops and bottoms of the cells are.

Is that normal or did it overheat?

OKMN 05-03-09 03:09 PM

What batteries should I go for as my first one? I don't want some dewalt that I need to fix stuff with. Just some clean and easy ones.
36V, 10AH I guess, shipping to EU/Sweden.

falconev 05-04-09 07:54 AM

Yes, I supply Lithium packs, thank god for that.
I can ship worldwide
contact me thru my website falconev.com
will match all the ebay sellers prices, if thats what you want, including the cheap plastic charger.

Blackdog1 05-21-09 02:26 AM

Hi, I am new here. Have decided to make an electric bike with a cyclone chain drive 500W 24V. I was just wondering why I can't use large motorcycle Gel batteries or even two car batteries mounted in a trailer, I realise they will not be as efficient but I only have to go 5 miles to work and they can charge all day there? This seems a sensible alternative as the price of batteries is shocking (more than the motor kit cost me). Thanks in advance Clive.

WvG 05-22-09 09:47 PM

Blackdog1.
I do a daily commute of 7 miles with 3 B&B 12V 8AH batteries and an Amped Bikes 500 Watt hub,
Cheap and effective. I charge at work.

garyhgaryh 08-11-09 10:41 AM

Quote:

Originally Posted by Blackdog1 (Post 8957407)
Hi, I am new here. Have decided to make an electric bike with a cyclone chain drive 500W 24V. I was just wondering why I can't use large motorcycle Gel batteries or even two car batteries mounted in a trailer, I realise they will not be as efficient but I only have to go 5 miles to work and they can charge all day there? This seems a sensible alternative as the price of batteries is shocking (more than the motor kit cost me). Thanks in advance Clive.

I was thinking the same thing about either using a small car battery that you can buy at Costco or
Walmart or a motorcycle gel cell.

Someone said that these batteries need to be at or near 100% all the time.

These batteries are cheap so I am actually of thinking of trying them on my eZip: 24volts.
I would tie the batteries in series. Probably a $100 experiment.

Quote:

Originally Posted by WvG (Post 8969592)
Blackdog1.
I do a daily commute of 7 miles with 3 B&B 12V 8AH batteries and an Amped Bikes 500 Watt hub,
Cheap and effective. I charge at work.

What's a B&B battery and where do you get it?

Gary

brandrr 09-10-09 10:24 PM

fast ?
 
Hello sorry if im posting this in the wrong area,
but im like really new to the E-bike thing....
Why dont people just use a Dual 12V car battery,
that will give the low 24V, but at a very high amp, (ponders) because i keep seeing people
going to the big 2KW, Goals from some other fourms,
, the batterys I see are so low amps, 10a and 12a,
I mean 10a * 36v = 360watts,
or you can have a Dual 12v (car batt)but amps closer to like 500amps and UP
24V but at 600a = 14,400 watt's or 14.40kW
Is it because the motor control unit(mcu) cant handel that high of amp's?
or... IDK, is there a simple answer,

R-
Brandrr@live.com

brandrr 09-10-09 10:39 PM

sorry, I cant really find much information on it but I just did, with a friend.

*pouts* yes Is my answer its all about the controlers
http://www.electricrider.com/parts/controllers.htm

I found a 72V @ 40amps = 2880 watts:love:,. so I guess I got a good goal, to start Rocking a battery set up for this... :love:

I got 2-Currier's (450) watts in the mail, and will be using that as a beta , bike, and one to keep stock, (for mom of course) and the mod one im doing will be to really set up my old Dual sport motorcycle as a electric bike, Since its motor really only put out 14 HP at max rpm,
and that was really just a spike, it never really had any low end, and the frame is really low weight,
and I kinda started some wiring, for the batters.

-R

Juiced Riders 09-11-09 02:53 AM

http://www.juicedriders.com/storage/...ile-30854.jpeg
A good reliable battery is the biggest frustration at the moment with E-bikes. We are starting here and working to make this issue better. We have many new LifePO4 48V 15AH packs in stock and ready to ship from California. These packs have built-in BMS for an elegant drop-in fit for your SLAs. It has a 2 year factory warranty and included 3A charger. We plan to offer more variety in the future.

Some new test results have been posted. The performance speaks for itself.

Please visit JuicedRiders.com
We are a group of enthusiasts who want to bring E-bikes to everyone.

conact: info@juicedriders.com for direct pricing.

JinbaIttai 09-11-09 04:06 AM

Quote:

Originally Posted by brandrr (Post 9653525)
Why dont people just use a Dual 12V car battery,
that will give the low 24V, but at a very high amp, (ponders) because i keep seeing people
going to the big 2KW, Goals from some other fourms,
, the batterys I see are so low amps, 10a and 12a,
I mean 10a * 36v = 360watts,
or you can have a Dual 12v (car batt)but amps closer to like 500amps and UP
24V but at 600a = 14,400 watt's or 14.40kW
Is it because the motor control unit(mcu) cant handel that high of amp's?
or... IDK, is there a simple answer,

It doesn't really work that way. Sure a car battery can put out 500-600 amps. Usually a car battery manufacturer provides a cold cranking amps (CCA) rating of around 500-600 amps, which is a rating given to batteries to determine if they can do what it takes to turn a car starter motor in the dead of winter for a few seconds. And a few seconds is all you will get at that kind of current draw. Ever witness a car that won't start? After about 30 seconds or so the battery is already dead.

Unfortunately car batteries and all other lead acid batteries are subject to Peukert's effect. The gist of Peukert's effect is that the more current you try to pull from a car battery, the less capacity it will give you.

Here's an example: http://www.batteriesinaflash.com/flo...n?currency=USD

At the bottom of the page the specs are listed.
That particular battery is rated to provide 190 amp hours, but only if you discharge the battery slowly over a 20 hour period. Try and do it in 5 hours and you only get 155 amp hours out of it. That's Peukert's effect. Now imagine how much less capacity you'd get shortening the discharge rate to 15 minutes.

There's much more to it than just that. Generally speaking the higher the voltage, the higher the top speed of the motor. It has to do with counter-electromotive force limiting the top speed of the motor.
Hope this helps, have fun experimenting!

brandrr 09-11-09 07:56 PM

ok now i got ya... *blush*
This is my first bike..
Currie Trailz Electric Bike.
I got one on the way, should be here on Tue, or wed, Its now Friday night, and I got it comming to my work, and I some how ordered a second one., Kinda a good thing, because 1 to mod and 1 to keep stock.
*haha*
I was told from a few people that the 450watt stock motor can take a battery pushing, 36 volt, @ 20 amps,

*any feed back on this.*


http://www.smartgauge.co.uk/peukert2.html
they will work in more of just a compasitor, mode vs a longer lasting battery.

brandrr 09-11-09 08:04 PM

OMG the LiFePO4 cost a arm and leg... WOw, *pouts* + 48 Volt motor and controler..

brandrr 09-11-09 08:07 PM

o wow, is there any brand on the motors thats known like the LiFePO4 batterys, to be GooD..
I know a few people were telling me about Scott motors, but at my work there known as to be....
*$hit* and we use Alot of motors in a bowling ally,

this page kinda is what i have found.. so far..


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