kolmstead
Well-known member
I am hauling my LEAF to Palmdale on Friday for second annual mandatory battery usage report. After failing to make the 84 mile trip (both ways) last year, I'm going to haul the car on a flatbed trailer this year. According to my SOC meter, my car's battery has 80% of original capacity. Based on Stoaty's model, it has probably lost more like 15%.
Since I'm not driving it down, I can present the car for service at any SOC I want. Last year they did the cell pair voltage test without my asking after I had the car towed in, so I can probably get it done again this time. Unfortunately, they charged the battery to 70% before they did the test, and CPVs looked fine.
I'll probably tape the charge port door shut and write 'DO NOT CHARGE' on the tape.
Is there a 'best SOC' for cell pair voltage test? If so, I will run the battery down to that level before I load the car on my trailer. I'm thinking somewhere around VLBW. Would that put the cells well below the 'knee' on voltage?
Will this provide useful information? If not, I'll just haul it down at about 25% SOC, which is where it will be after my normal commute Thursday. That's where I try to leave the SOC when I'm not driving the LEAF for a day or two.
I'll also talk to the dealer about trade-in on leased 2012 LEAF, but I don't expect much encouragement there. The new battery capacity warranty may be my only hope.
-Karl
Since I'm not driving it down, I can present the car for service at any SOC I want. Last year they did the cell pair voltage test without my asking after I had the car towed in, so I can probably get it done again this time. Unfortunately, they charged the battery to 70% before they did the test, and CPVs looked fine.
I'll probably tape the charge port door shut and write 'DO NOT CHARGE' on the tape.
Is there a 'best SOC' for cell pair voltage test? If so, I will run the battery down to that level before I load the car on my trailer. I'm thinking somewhere around VLBW. Would that put the cells well below the 'knee' on voltage?
Will this provide useful information? If not, I'll just haul it down at about 25% SOC, which is where it will be after my normal commute Thursday. That's where I try to leave the SOC when I'm not driving the LEAF for a day or two.
I'll also talk to the dealer about trade-in on leased 2012 LEAF, but I don't expect much encouragement there. The new battery capacity warranty may be my only hope.
-Karl