Resetting Active BMS?

• J

  Jamie

  1/31/22, 3:15 PM
  Quick Question: Is there a way of resetting the BMS when connecting to a new battery pack? It seems when I connect the BMS to a new battery the SOC and other attributes seem to carryover from the previous, and it doesn\'t feel like the charging process is going as effectively as it should. Context: In order to reduce the top balancing time for my 1120ah 16 cell 4P4S battery, I\'ve been dividing them into 4 cell batteries and charging them up to 14v (3.5 per cell) before transferring them over to the bench power supply to be top balanced to 3.65v per cell. This went well for the first set of cells. However, when I connected the second battery it immediately showed 100% SOC despite cells averaging 3.3v. This second battery took a very long time to charge. It seems like it\'s progressively getting more challenging and taking longer to charge the later batches.  The current/last batch has been on the charger for more than 15 hours starting at 13.4v (3.35 per cell) and based on my remote view from work it appears it\'s only at 13.8v at the moment with no charging current going to the cells.  
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• R

  Richard OGM Support Staff

  1/31/22, 6:13 PM
  There is no master reset but you can use the SOCS command to set your SOC to an approximate value and over the next several full cycles it will zero in on the correct value.  Remember that many of the internal calculations are not static and require many cycles to achieve some order of accuracy.  
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• J

  Jamie

  2/1/22, 6:19 PM
  Thank you Rick. Much appreciated.
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