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  1. B

    Battery Issue

    1.75 and 1.70 are close enough but I'm not charging at 38.5A anyway. I'll probably even drop down to 15-20A since charging speed isn't much of a concern for me
  2. B

    Battery Issue

    The capacity of the pack is 77 Ah because there's 22 batteries in parallel. Doesn't that mean I can charge the pack at 77/2 = 38.5A? That's only 1.75A per battery. That's also how I'm able to safely discharge the pack at over the max individual cell rating of 10A... Yes, but 30A is the max the...
  3. B

    Battery Issue

    I charged again and now they're within 3mv
  4. B

    Battery Issue

    Yeah I guess it is 90% huh. Icharger will only charge at 30A max. The others were ending up at like 3.9v after resting. I guess the charger is cutting off before they can balance out? The others ended up at around 3.9-3.95 Cell difference the beginning vs end of 1S AND separately at the...
  5. B

    Battery Issue

    Now at ~45 amps and after 20 minutes, the output 10 gauge silicone wire is 108 degrees F and the batteries closest to the silicone wire are 95 degrees F
  6. B

    Battery Issue

    All the series have around the same resistance now after adding the 12 gauge copper across the pack positive and negative ends.
  7. B

    Battery Issue

    Yes, 1S and 7S. 0.4C (30 amps) charging to target 4.10v Li io setting on iCharger X12. I guess i should stop at 90% instead. First cell in the row ends up at like 3.80v while last cell is at 3.71. Then it takes a while for them to equalize afterwards. The cells in the other groups are closer in...
  8. B

    Battery Issue

    Also noticed that the 1st and last battery in those end parallel groups were farther off with their voltages vs the other sets after charging. So like you said, uneven flow.
  9. B

    Battery Issue

    Thanks, I just saw your reply after I had soldered 12 gauge solid core copper wire across the pack positive, which dropped the resistance from 3 milli ohms on that series to around 1.5 (around the same as the others). The only other wire I had available was 8 gauge and that seems a little too...
  10. B

    Battery Issue

    I created a 7S22P 18650 battery pack. For some reason, the first and last series have slightly higher resistance and the positive and negative ends of the pack get hot during high (20+A) current draw. What would be causing this and how do I fix? I did connect the balance charger wires...
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