TickTock
Well-known member
At Greg's urging, I added a Resr computation to the software (just published). To access. select the "Trip" screen from the index and advance to the "Next" via the lower right button (ran out of slots in the index screen). This will bring up a "Health" screen with all the pertinent information plus Resr and the *unloaded* pack voltage.
To compute Resr, I am using a textbook LMS function to minimize the error in the model: unloadedV = measuredV+measuredI*Resr. It is updated each second so you may see Resr fluctuate while driving. When my leaf was new, I was getting ~75mOhms. Today I am reading around 100mOhms. If you have a newer Leaf, it may take a few seconds to converge on your value since I set the initial condition to 100mOhm. (Example: it will take a minimum of 25 seconds to move from the 100 initial condition to 75). I will probably change the i.c. to 75 in the next release but that won't change the steady-state value.
To compute Resr, I am using a textbook LMS function to minimize the error in the model: unloadedV = measuredV+measuredI*Resr. It is updated each second so you may see Resr fluctuate while driving. When my leaf was new, I was getting ~75mOhms. Today I am reading around 100mOhms. If you have a newer Leaf, it may take a few seconds to converge on your value since I set the initial condition to 100mOhm. (Example: it will take a minimum of 25 seconds to move from the 100 initial condition to 75). I will probably change the i.c. to 75 in the next release but that won't change the steady-state value.