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  1. Z

    bluetooth BMS?

    0.11 V it is normal voltage drop after unplug charger. When i charge li-ion to 4,2V , after 1hour voltage drop to 4,18V
  2. Z

    bluetooth BMS?

    Yes, it is possible change settings only with app. But i cant set max voltage 3,5V for LFP, min 3.65V - I must set this voltage by pc. For li-ion I think no problem with 4.1V max voltage, problem is low value.
  3. Z

    bluetooth BMS?

    After balancing stop what is the cell voltage?
  4. Z

    bluetooth BMS?

    Hi guys, you have a lot of experience with chinese BMS so I think you can give me some advice. I try some upgrade on 4S80A smart BMS, I use external fet and external resistor and now I can balancing without problem over 1A/cell. I try this upragede on 8S/12S and 16S version and I see one fault...
  5. Z

    bluetooth BMS?

    I asked the seller for it and put it on the web. https://www.aliexpress.com/item/4S-80A-smart-board-LiFePO4-BMS-PCM-PCB-battery-protection-board-for-4-Packs-18650-Battery/32858251761.html?spm=a2g0s.9042311.0.0.cgm0eP
  6. Z

    bluetooth BMS?

    Pack in background is only test 12V battery (app 7Ah from defective assistant starting car box). Determining of BMS is 12V 100Ah LFP battery for boat motor. I carefully select the cells according to their capacity, the charging voltage is 3.5V/cell, discharging not exceed 3V. At the end of the...
  7. Z

    bluetooth BMS?

    Hi, i have question for balancing current. I have 4s 80A BMS with bluetooth, but 50mA balance current is not too much. Chip is bq7692003, transistor for resistor SMD Y2, and bleeding resistor value 75ohm. I try 10ohm in paralel, slightly better, but still little. I would need to get around 1A...
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