Any feedback gratefully received!
The AHr, SOH, and Hx values are about what a new battery would have so I believe there are three possibilities:Catflyer wrote:Hi. My partner and I are looking at buying a Leaf and have been using LeafSpy Pro to check out second hand cars. We test drove a 2013 Leaf with 40k+ km (25k+ miles) on the odo and got the following Battery Status:
AHr=67.36
SOH=100%
Hx=104.11%
106 QCs & 3114 L1/L2s
min/avg/max=3.931, 3.936, 3.941 (10mv)
Temp C=8.6, 8.4, 8.7 (F=47.4, 47.1, 47.6)
All of the Cell Pairs except 1 were showing red and this was consistent for the 2km test trip we did.
This all seems a bit weird for a 3 year old car with 40k+ km on the clock? Any ideas on what is going on?
After the drive I noticed that I had the LeafSpy Pro set to 2011 Year. would this have effected any of the values returned by LeafSpy Pro? Also note that this is a ex Japan import (as are most of the Leafs on sale here in New Zealand).
Thanks Gerry for your insights!GerryAZ wrote:The AHr, SOH, and Hx values are about what a new battery would have so I believe there are three possibilities:Catflyer wrote:Hi. My partner and I are looking at buying a Leaf and have been using LeafSpy Pro to check out second hand cars. We test drove a 2013 Leaf with 40k+ km (25k+ miles) on the odo and got the following Battery Status:
AHr=67.36
SOH=100%
Hx=104.11%
106 QCs & 3114 L1/L2s
min/avg/max=3.931, 3.936, 3.941 (10mv)
Temp C=8.6, 8.4, 8.7 (F=47.4, 47.1, 47.6)
All of the Cell Pairs except 1 were showing red and this was consistent for the 2km test trip we did.
This all seems a bit weird for a 3 year old car with 40k+ km on the clock? Any ideas on what is going on?
After the drive I noticed that I had the LeafSpy Pro set to 2011 Year. would this have effected any of the values returned by LeafSpy Pro? Also note that this is a ex Japan import (as are most of the Leafs on sale here in New Zealand).
1) The battery was just replaced and the car has not been driven more than a few kilometers.
2) Someone fraudulently reset the LBC (lithium battery controller also called the BMS or battery management system). If so, the AHr, SOH, and Hx numbers will drop rapidly as the car is used on a daily basis.
3) The car has way more charge cycles than one would expect for the number of kilometers it has been driven. The car may have only been driven very short distances and recharged so it has never been discharged enough for the LBC to determine the true battery capacity and condition. If so, the AHr, SOH, and Hx numbers will drop as the car is used and the battery is deeply discharged once in a while.
I doubt that having Leaf Spy set for 2011 would cause incorrect readings of AHr, SOH, and Hx values. It is normal to have many of the cell pairs showing red (shunts active for cell balancing) under certain conditions so that by itself is not a concern (my 2015 shows mostly red when I start driving after charging). To give you some numbers for comparison, here are the latest from my 2015 when parked last night with new values in parentheses: AHr=55.28 (64.38), SOH=89% (100%), Hx=83.37% (101.25%), odometer=25,590 miles (9 miles when initial Leaf Spy readings were taken on February 7, 2015), QC=23 (1), and L1/L2=432 (4). Battery temperatures when parked last night were 108.6 F, 106.7 F, and 104.9 F.
Gerry
Only just done the sums on the L1/L2 charge number - 3114 charges, assuming 4 years (being generous) that is 208 weeks = approx 15 charges per week on average. Seems very excessive.GerryAZ wrote:The AHr, SOH, and Hx values are about what a new battery would have so I believe there are three possibilities:Catflyer wrote:Hi. My partner and I are looking at buying a Leaf and have been using LeafSpy Pro to check out second hand cars. We test drove a 2013 Leaf with 40k+ km (25k+ miles) on the odo and got the following Battery Status:
AHr=67.36
SOH=100%
Hx=104.11%
106 QCs & 3114 L1/L2s
min/avg/max=3.931, 3.936, 3.941 (10mv)
Temp C=8.6, 8.4, 8.7 (F=47.4, 47.1, 47.6)
All of the Cell Pairs except 1 were showing red and this was consistent for the 2km test trip we did.
This all seems a bit weird for a 3 year old car with 40k+ km on the clock? Any ideas on what is going on?
After the drive I noticed that I had the LeafSpy Pro set to 2011 Year. would this have effected any of the values returned by LeafSpy Pro? Also note that this is a ex Japan import (as are most of the Leafs on sale here in New Zealand).
1) The battery was just replaced and the car has not been driven more than a few kilometers.
2) Someone fraudulently reset the LBC (lithium battery controller also called the BMS or battery management system). If so, the AHr, SOH, and Hx numbers will drop rapidly as the car is used on a daily basis.
3) The car has way more charge cycles than one would expect for the number of kilometers it has been driven. The car may have only been driven very short distances and recharged so it has never been discharged enough for the LBC to determine the true battery capacity and condition. If so, the AHr, SOH, and Hx numbers will drop as the car is used and the battery is deeply discharged once in a while.
I doubt that having Leaf Spy set for 2011 would cause incorrect readings of AHr, SOH, and Hx values. It is normal to have many of the cell pairs showing red (shunts active for cell balancing) under certain conditions so that by itself is not a concern (my 2015 shows mostly red when I start driving after charging). To give you some numbers for comparison, here are the latest from my 2015 when parked last night with new values in parentheses: AHr=55.28 (64.38), SOH=89% (100%), Hx=83.37% (101.25%), odometer=25,590 miles (9 miles when initial Leaf Spy readings were taken on February 7, 2015), QC=23 (1), and L1/L2=432 (4). Battery temperatures when parked last night were 108.6 F, 106.7 F, and 104.9 F.
Gerry
Thanks again for the info Gerry. I will have a wee look at the range charts but because the car is at a dealers I don't really have an option to do a LBW or VLBW test, unfortunately. I have a few other options here so will go take them for a drive and see what numbers I can get from them.GerryAZ wrote:My best guess is that the exporter in Japan or the importer in New Zealand reset the LBC (using Consult 3+ which most dealers and many independent shops have). I think it could easily go 170 km without capacity numbers dropping if the battery was never significantly discharged. As I said before, the cell-pair shunting you noticed is nothing to be concerned about--I consider it normal because my 2015 often does that after charging. One way to confirm the battery capacity is to start with a full charge and drive until you get down to LBW or VLBW (low battery warning or very low battery warning). Compare the driving distance with the range charts Tony Williams created to determine the true battery capacity. The high charge count could be partly explained if charging and climate control timers were used a lot because they can add extra L1/L2 charge counts. The 106 quick charges is also a little more than I would expect, but not really detrimental. 25,000 miles divided by 3220 charges is only 8 miles per charge average. If each charge cycle increased count by 3 due to timer use, the average travel distance per charge goes up to 24 which is more reasonable.
Gerry