Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Electric Bikes Here's a place to discuss ebikes, from home grown to high-tech.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 09-23-08, 04:32 PM   #1
misslexi
Senior Member
Thread Starter
 
misslexi's Avatar
 
Join Date: Aug 2008
Bikes:
Posts: 218
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
eBay LiFePO4 seller dy-power, so far so good

I bought a 36V 20AH pack from seller dy-power, includes BMS. So far so good, it measure out fine, meets AH spec at a 0.5A rate (that's all the power resistors I have), and charges fine. It's your basic duct tape pack for <$30/AH.

Received it within 8-10 days, well packaged.

Very fast response to all questions.

Anyway, just an FYI in case anyone is shopping.
misslexi is offline   Reply With Quote
Old 09-24-08, 04:06 AM   #2
alfonsopilato
eBiker
 
alfonsopilato's Avatar
 
Join Date: Jul 2008
Location: Toronto
Bikes: CCM Moutain bike fitted with 408 Crystalyte motor, 48V 12 AH battery, 20 amp 48 v Crystalyte controller
Posts: 152
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
How much did it cost?
alfonsopilato is offline   Reply With Quote
Old 09-24-08, 09:43 AM   #3
misslexi
Senior Member
Thread Starter
 
misslexi's Avatar
 
Join Date: Aug 2008
Bikes:
Posts: 218
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Sorry, I should have thought about posting a link in the first place. Here it is.

http://cgi.ebay.com/ws/eBayISAPI.dll...:X:RTQ:US:1123

At $578 delivered, that's $28.90/AH which was the best I could find at the time I was looking. You also have to consider they do NOT include a charger. I bought one from ping for $52 delivered so my total cost per AH is $31.50. That's still a good price per AH I think.

Using Dewalt 36V batteries for example, which I would dearly love to, are closer to $100/AH.

I realize that AH only tells part of the story, and it is an important consideration. The continuous discharge rate is also important, particularly for high power applications. The pack I bought from dy-power is 1.5C or 30A continuous discharge which is over 1KW. Since I'm using a 600W motor and a 30A controller, the pack will meet my needs.
misslexi is offline   Reply With Quote
Old 09-24-08, 11:27 AM   #4
bdcain
grand wazoo
 
Join Date: Aug 2008
Bikes:
Posts: 50
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
what does it weigh?
bdcain is offline   Reply With Quote
Old 09-24-08, 03:10 PM   #5
misslexi
Senior Member
Thread Starter
 
misslexi's Avatar
 
Join Date: Aug 2008
Bikes:
Posts: 218
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Fresh from the digital bathroom scale: 15.0 lbs.

And...

It has independent discharge and charge wires, 4 total. Both + (red) wires go directly into the pack, both - (black) wires go into the BMS. Charge wires look to be around 18 gauge, discharge looks to be about 12 gauge.

Seller states the BMS protects from both over charge and over discharge.

Last edited by misslexi; 09-24-08 at 03:21 PM. Reason: add
misslexi is offline   Reply With Quote
Old 09-24-08, 09:40 PM   #6
cheesepuff12
Senior Member
 
Join Date: Jul 2008
Bikes:
Posts: 145
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
i have a ping ping battery of this type. cant wait to put it on my battery.
cheesepuff12 is offline   Reply With Quote
Old 09-25-08, 09:23 AM   #7
misslexi
Senior Member
Thread Starter
 
misslexi's Avatar
 
Join Date: Aug 2008
Bikes:
Posts: 218
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Update: I noticed today the seller is offering a different battery with the BMS built into the charger instead of the pack. And including a 2A charger as part of the deal.

I'm not sure how moving the BMS to charger will affect protection from over discharge; maybe they split the BMS into two circuits??

They also seem to be offering even higher AH packs.

Guess I bought version 1.0 huh?
misslexi is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 10:22 AM.