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« on: September 07, 2022, 11:26:14 PM »
The Cypher 3 firmware is for the dash, not for BMS. The way I see the problem is that they incorrectly calibrate the Ah left with the voltage. I don't know how they do it, but Nissan LEAF for example calibrates the battery as empty when any single cell (corrected for internal resistance) reaches minimum voltage (not empty, just Very Low Battery Warning). Then when you recharge the car to full, the battery recalibrates the state of health.
On ZERO the Very Low Battery warning comes on based on the Coulomb counter (AH, SOC) which is stupid, since the computer should clearly see that the battery still has capacity left based on the voltage reading. The BMS is only slowly increasing the SOC variable because the voltage is too high for the calculated SOC variable.
People are recalibrating the capacity on ZERO by running the bike to total empty until you get Battery Depleted Error and then charging as slowly as possible to full. I guess they should work on the algorithm to recalibrate more often. If the system encounters the phantom charging, it should increase the battery reported capacity so it does not happen next time.