Power in Flux
Likes Likes:  0
Page 1 of 2 12 LastLast
Results 1 to 10 of 13

Thread: Question on BMS

              
   
   
  1. #1
    Junior Member smroyalsemp's Avatar
    Join Date
    Dec 2013
    Posts
    25
    Post Thanks / Like

    Question on BMS

    Hello everyone we are high school students building an electric motorcycle. You can check out our build thread here http://www.elmoto.net/showthread.php...rcycle-Project
    However we have a question about a BMS for our bike we found this one http://www.batteryspace.com/lfp-bms-...n-display.aspx but we are not sure about the quality or if it is compatible with our batteries because the picture it shows uses a different connection type. If anyone has info on the quality of this one or a recommended one that would be awesome. We have 24 CALB 40Ah batteries so 72 volts. Thanks in advance.
    Luke A.
    Kevin G.
    Richard T.
    Cody K.

  2. #2
    Senior Member Athlon's Avatar
    Join Date
    Jul 2011
    Location
    Milan, Italy
    Posts
    381
    Post Thanks / Like

    My Social Networking


    Add Athlon on Linkedin
    the link to the BMS is not working

  3. #3
    Junior Member smroyalsemp's Avatar
    Join Date
    Dec 2013
    Posts
    25
    Post Thanks / Like
    Quote Originally Posted by Athlon View Post
    the link to the BMS is not working
    Let's try this again
    http://www.batteryspace.com/lfp-bms-...n-display.aspx
    Luke A.
    Kevin G.
    Richard T.
    Cody K.

  4. #4
    Senior Member Athlon's Avatar
    Join Date
    Jul 2011
    Location
    Milan, Italy
    Posts
    381
    Post Thanks / Like

    My Social Networking


    Add Athlon on Linkedin
    is the elitepowersolution.com BMS , is designed for GBS batteries
    http://elitepowersolutions.com/produ...ges/100-24.jpg

    I used the previous version on a E-max scooter conversion , and was working ok.
    Never tryed this new version

    GBS batteries are a Lithium Manganese Oxide a different chemestry than Lithium Iron Phosphate but the BMS is programmable and anyway voltage setting of the two chemestry are really very similar so you can use the ElitePowerSolution BMS on LiFePO4 battery. It will take some work to adapt the board to differen cell connection ( Other band use a single M8 nut , GBS use 4 smaller screw) , maybe you can ask Rick or Yuan to make an M8 version for you so you can use it without any changes

  5. #5
    Seņor Member podolefsky's Avatar
    Join Date
    Oct 2010
    Location
    Boulder, CO
    Posts
    3,890
    Post Thanks / Like
    I've used that BMS with my GBS cells. It's a good system, but boards will only work with GBS. I wouldn't even try to adapt them to CALB. If you want a distributed system, try the Lithiumate Lite.

    GBS are LiFeMnPO4. They behave the exactly same as plain LiFePO4.
    - Noah Podolefsky -
    The GSX-E

  6. #6
    Junior Member smroyalsemp's Avatar
    Join Date
    Dec 2013
    Posts
    25
    Post Thanks / Like
    Quote Originally Posted by podolefsky View Post
    I've used that BMS with my GBS cells. It's a good system, but boards will only work with GBS. I wouldn't even try to adapt them to CALB. If you want a distributed system, try the Lithiumate Lite.

    GBS are LiFeMnPO4. They behave the exactly same as plain LiFePO4.
    If they behave the same what causes them to not work?
    Luke A.
    Kevin G.
    Richard T.
    Cody K.

  7. #7
    Junior Member smroyalsemp's Avatar
    Join Date
    Dec 2013
    Posts
    25
    Post Thanks / Like
    I just found this one has anyone used it? http://www.evsource.com/tls_cleanpower.php It looks like it would work pretty well and the unit looks fairly small.
    Luke A.
    Kevin G.
    Richard T.
    Cody K.

  8. #8
    Seņor Member podolefsky's Avatar
    Join Date
    Oct 2010
    Location
    Boulder, CO
    Posts
    3,890
    Post Thanks / Like
    Quote Originally Posted by smroyalsemp View Post
    If they behave the same what causes them to not work?
    It's the bolt pattern, like Athlon said. The EPS boards have 2 small bolt holes on each side. For CALB, you would need one large (M8) hole. Modifying the EPS boards to fit the CALB terminals would probably result in destroying the boards. They're pretty fragile. Maybe not, but it doesn't seem worth it when you could just get the Lithiumate Lite for about the same price.

    The MiniBMS that you found is also good. Lots of people have used it successfully. Bare bones, but it will maintain and protect your pack.
    - Noah Podolefsky -
    The GSX-E

  9. #9
    Junior Member smroyalsemp's Avatar
    Join Date
    Dec 2013
    Posts
    25
    Post Thanks / Like
    Quote Originally Posted by podolefsky View Post
    It's the bolt pattern, like Athlon said. The EPS boards have 2 small bolt holes on each side. For CALB, you would need one large (M8) hole. Modifying the EPS boards to fit the CALB terminals would probably result in destroying the boards. They're pretty fragile. Maybe not, but it doesn't seem worth it when you could just get the Lithiumate Lite for about the same price.

    The MiniBMS that you found is also good. Lots of people have used it successfully. Bare bones, but it will maintain and protect your pack.
    We got a quote back from Lithiumate Lite and it was $1100 which is just to far out of our price range. So at this point we are thinking the MiniBms because it is much more affordable.
    Luke A.
    Kevin G.
    Richard T.
    Cody K.

  10. #10
    Seņor Member podolefsky's Avatar
    Join Date
    Oct 2010
    Location
    Boulder, CO
    Posts
    3,890
    Post Thanks / Like
    Are you sure that was the Lite and not the Pro? For 24S it should be under $700.

    Go here, click Configure under custom near the bottom.

    http://www.electriccarpartscompany.c...204_p_476.html

    MiniBMS will still be a lot cheaper.
    - Noah Podolefsky -
    The GSX-E

Page 1 of 2 12 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •