Search results

Date Relevance Most replies

  1. E

    $0.32/Wh NiMh. Too good to be true?

    Yes, that was truly informative and entertaining! The only reason I'm messing with NiMH at all is because I had high quality high rate Japanese cells for $0.08/Wh from a different project lying around. And even then, it is with trepidation and numerous precautions. Plus, the low cell voltage...
  2. E

    96v nimh battery build

    Wow that's impressive! It is because of this forum's wisdom that I'm putting my cheap used (but still strong) NiMHs in 1000 degree fiberglass sleeves. I believe that when they go, they get hot enough to melt the plastic shrink wrap, which could short out adjacent cells and cause a chain...
  3. E

    96v nimh battery build

    Do your chargers have thermistors? If so, they may be terminating charge due to leftover heat in the cell. If not, they may be too sensitive to noise and detecting false -dV Another possibility: if the charger terminates on some overvoltage (say 1.56V/cell) and you have any flaky charging...
  4. E

    Prius Batteries - How to make them work

    It works! This one: http://www.all-battery.com/tenergynimhbatterycharger01017.aspx Works great for a string of 40 of these cells (not super fast though).
  5. E

    Prius Batteries - How to make them work

    Nice work (and courage)! Op amps are pretty handy aren't they? I forgot to mention that even at the C/10 charging rate it is pretty easy to see the -dV and feel the cells warm up, so I'm going to try an off-the-shelf Ni charger to see if it works. I tried a small one (<1A) but the long charge...
  6. E

    Prius Batteries - How to make them work

    Some of my experiences in case it may help someone: I scored about 120 of the Panasonic HHR650D cells about two years ago for $80. I think these were the same cells as the 1st gen Prius. They were of unknown previous usage and were configured for laptop batteries: 20 packs each of 6 cells in...
Back
Top