TickTock
Well-known member
I recently plotted gids versus time along side of energy versus time:
Since the perturbations in the gid curve during a charge occur between 25 and 50 gids (which bounds the knee in the voltage vs charge curve), I am starting to believe that gids are nothing more than a linearized version of the voltage. I am guessing a polynomial is applied to the voltage, the coefficients of which are re-computed periodically to adjust for degradation. Makes sense, really, because with a lot of driving and regen cycles, integrating errors will start to accumulate. Voltage gives a more absolute measurement than trying to keep track of electrons as they move in and out of the battery. Not sure how useful this is - just, explains why is varies and may even explain why some people observe more energy per gid below 50 gids and others may not.
Since the perturbations in the gid curve during a charge occur between 25 and 50 gids (which bounds the knee in the voltage vs charge curve), I am starting to believe that gids are nothing more than a linearized version of the voltage. I am guessing a polynomial is applied to the voltage, the coefficients of which are re-computed periodically to adjust for degradation. Makes sense, really, because with a lot of driving and regen cycles, integrating errors will start to accumulate. Voltage gives a more absolute measurement than trying to keep track of electrons as they move in and out of the battery. Not sure how useful this is - just, explains why is varies and may even explain why some people observe more energy per gid below 50 gids and others may not.