GoldenMotor.com Forum

General Category => General Discussions => Topic started by: MasterCATZ on May 09, 2010, 11:31:15 PM

Title: Battery Cells Should I get these
Post by: MasterCATZ on May 09, 2010, 11:31:15 PM
http://cgi.ebay.com.au/LiFePO4-10AH-cell-3-3V-8C-electric-bike-bicycle-battery-/320528935935?cmd=ViewItem&pt=AU_Electronics_Batteries_Chargers&hash=item4aa1036bff

expensive almost $2k to build an 8C 72V 20 ah kit ... but Very light under 10kg


around 200mm * 240mm in size for the bank

anyone know of something cheaper / better ?
Title: Re: Battery Cells Should I get these
Post by: muzza.au on May 10, 2010, 08:44:56 AM
Quote from: MasterCATZ on May 09, 2010, 11:31:15 PM
anyone know of something cheaper / better ?
Yes I do!

Are you in Aussie land also?

If so check out EMTB. They use Headway packs and cells and they are cheaper than the one on ebay, but look identical.

See http://www.e-mtb.com.au/lithium-batteries-c-75.html?zenid=48842e91850b9399769d6e58ff93ca83 (http://www.e-mtb.com.au/lithium-batteries-c-75.html?zenid=48842e91850b9399769d6e58ff93ca83)
(http://www.e-mtb.com.au/images/38120S-2.jpg)
They have packs already made up that would be cheaper than building your own, although their chargers are more expensive.

I have 2 of the following chargers (a 24v and a 36v), cheap, but work very well: http://cgi.ebay.com.au/Newest-36v-220v-5A-Charger-LiFePo4-battery-Power-FS-/170484254939?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item27b1a748db (http://cgi.ebay.com.au/Newest-36v-220v-5A-Charger-LiFePo4-battery-Power-FS-/170484254939?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item27b1a748db)

If you really need 72v 20ah, you could buy 4 of their 36v 10ah packs @ $390.00 each plus you would need 2 36v chargers (another $100.00) which would be about $1660.00 (plus postage if necessary).

Do you really need all that much capacity (v and a)?

Muzza.au
Title: Re: Battery Cells Should I get these
Post by: MasterCATZ on May 10, 2010, 12:33:02 PM
cheers and yep another OZ


those batterys are only 5c but half the price ... mmm how much regen recharge would 2x MP2's do ?


wanna do dual MP2

need something that can handle regen load of 2x MP2

and want the SPEED :P

tho I might just have an toggle switch to go between 36v 40AH and 72v 20ah
still not to sure about what to do about the bike light system

maybe only 72V at daytime ....
Title: Re: Battery Cells Should I get these
Post by: muzza.au on May 10, 2010, 08:11:13 PM
Quote from: MasterCATZ on May 10, 2010, 12:33:02 PM
still not to sure about what to do about the bike light system
Do what I did, use dc-dc converters. My bike is 60v. A 36v plus a 24v. I can run it on 36v only or switch on the 24v for 60v (which I do 99% of the time). With the dc-dc converter it makes no difference to the lights.

Muzza.au