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  1. bobbill

    Homemade Battery Packs

    LFP cell are interesting, but in for a penny on 18650s
  2. bobbill

    Homemade Battery Packs

    Dark Angel, Dig, but most is way over this dodger'ss noggin. Am a simple dodger who powers me two bikes (now) to ride, using 18650 packs, which am sure will be replaced with trickier, more juiced cells, in short time... Opps, am now doing mower...was using wet 36 but replacing with 10s7p...
  3. bobbill

    Homemade Battery Packs

    John appreciate the info. Every cell I have acquired, which, admittedly is only 120 cells, or so, has been at 3.6 V which coincides with advice I have received here as optimum storage and at rest voltage. So, I set all to same voltage...as singles. Pack is different. Only cells I use, so far...
  4. bobbill

    BMS Recoms for 36v 10s7P Pack

    HK, bought 72 NCR PFs from parellelminer.com. Way low cost too, seemed to me. Have to layout build plan, Mark, V had no option to replace damaged components along with an attitude - forget them,
  5. bobbill

    BMS Recoms for 36v 10s7P Pack

    Thank-you,HK, I am a believer in "simple" and went through a very careful Vruzend assembly and had two failures (heat and out of balance stoppage) and do not wish to repeat. The BMSs supplied worked well (I think) and if I do the larger pack, need similar assurance is all. Seems I spend...
  6. bobbill

    BMS Recoms for 36v 10s7P Pack

    What works and is dependable?
  7. bobbill

    Noob Question re BMS

    Thank-you much...have learned more about BMS and balancing here than anywhere.
  8. bobbill

    Noob Question re BMS

    My-O-My, the BMS physics is so mysterious... I developed the notion that in a balance need, the cells in B simply balanced themselves, (high cells rushing current to bring low cells to match--to a point,whereon, the BMS acts to shut or continue). Which is also why I set the modules without BMS...
  9. bobbill

    Noob Question re BMS

    Thought I posted this...thanks. Have one 10S 4P pack set, using PFs all within .1V and in groups...and BMS hook up Now, charging as pack Usin g very slick NESE modules, no-weld...which are parellel first series later and with balancing need to mark each module so balance wires match up...
  10. bobbill

    Noob Question re BMS

    Thanks for help boys and girls...looks like things are working... Put cells (PFs) in modules, goes B first, all cells at 3.6 give or take .1v only puculiarity is with BMS balancee wires need to number and mark each module to hook up correctly... Now to charge as pack... I did good, thanks to...
  11. bobbill

    Noob Question re BMS

    HK, a number of sources say not to do max V and store or override charger limits....isn't a 36 v pack, at 44 or over a little hard on cells? Good example of why I ask seemingly dim ?s. Various advisors.... Frankly, the rchargeeady made pack charges and that is it...it stored all winter with...
  12. bobbill

    Noob Question re BMS

    HK, Merci. I might be okay, after grief. What I did, briefly, ignorant dude I am, is mess with product that failed, with one set. O had to redo non-weld packs and got another set of cells, the 30Qa. Made another pack and it ran for a a very short bit and quit, (BMS) shut it, after this bunch...
  13. bobbill

    Noob Question re BMS

    Chalo, Thanks...had reply but it disappeared...??? The 6. and 7. voltages were mine. Was advised to make equal and 6.5 was decent storage voltage...also advised that tenth of a volt is decent...and to set these suckers grouped together so BMS is not taxed in balance work...is all. BWIW have...
  14. bobbill

    Noob Question re BMS

    Thanks, The cells are 60 in number in two groups with BMS for each 36v pack of 30. The indiv, cells are 30Gs znd P-sonic INRs only and all near same voltage. give or take one-tenth of a volt. Does it make a diff if they vary in voltage by 10ths, say from 6.6 tp 7.1, arranged in simialr groups...
  15. bobbill

    Noob Question re BMS

    Couple things: 30 30Qs and 30 Pane NPT. Separate packs. None of my gizmo reads beyond .0 of a volt, so I sorta figure hat is normal and satisfied when cells are near each-other. Am I goofy?
  16. bobbill

    Noob Question re BMS

    John, cell cannot be off a tenth or three??? Tenth of a volt is not much to balance, seems.
  17. bobbill

    Noob Question re BMS

    Ex observations. Thing is if one asks ?, one gets an answer, so someone is privy. I have one ready made pack, that is so small, BMS might not be... But, it is why some of us ask ?s.
  18. bobbill

    Noob Question re BMS

    John and HP thank-you! I have some 30 cells. Cells vary in voltage from 6.1v to 6.9v, in 5 groups, which I have segregated to limit BMS' smoothing. Am about to assemble to form a 36V pack, doing parallel first, then series, but not connecting BMS, until later. Was just curious if BMS will do...
  19. bobbill

    Noob Question re BMS

    I sorta know what it should do....does it function when charging, all the time or only discharging??? I figure if hooked up is working to balance cells all the time.
  20. bobbill

    Rans Dynamik w/ Rans Rear carrier and Kickstand

    Has front fork shocks. Will have local BS pack and ship!!!
  21. bobbill

    Rans Dynamik w/ Rans Rear carrier and Kickstand

    Will have local BS pack and ship!!!
  22. bobbill

    RANS e-Bike Possible?

    Skanmatt, thinking of making of eDynamik. Love to see your pics. Should be easy to craft eDynamik.
  23. bobbill

    Which advice to follow???

    @ Agniusm,,,Aye, anal me did just that...finally did something properly, me did.
  24. bobbill

    Charge Level for 18650s

    Am thinking the packs from Amazon (Chinese) likely have no BMS monitors...
  25. bobbill

    Charge Level for 18650s

    Thanks R, I kinda do pack as the Chinese gal said...individual cells, did as you said, 6.6xv. Thing is, those eho-made pack said full; it registered as fully charged, after sitting in cool garage for months, and is still fully charged. The loose cells, all 60 or so, are now 6.95 or so...
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