Ahh. Any chance of getting the same data on a post update car ?dwl said:To clarify, the data above is pre update.
Ahh. Any chance of getting the same data on a post update car ?dwl said:To clarify, the data above is pre update.
The data for voltage and measured capacity (down to cutoff just above turtle) doesn’t change in an updated car but the GIDs points do shift. I was shown a graph of GIDs vs. measured kWh which for pre-update are offset (GIDs about 2kWh lower than measured over much of the discharge curve) and on an updated car match much more closely.SageBrush said:Ahh. Any chance of getting the same data on a post update car ?dwl said:To clarify, the data above is pre update.
All the cells were within 20 mv of each other. I have always found the VLBW and LBW warnings were always at 25 and 50 GID's no matter how much the battery capacity changed. Toward the end of the first battery's life LBW would sound off at 21% left.SageBrush said:I'm most interested in the lowest cell pair voltage, since that is the trigger for the VLB warning.johnlocke said:OK, I ran my battery down to 13 GID's today. I couldn't get the value for VLB because I was going up a long grade and couldn't pull over to record it but I do have a value for VLBW (25 GIDS, 6%) 334 VDC (3.48 V/cell). 9% (32 GID's) was 336 VDC (3.50 V/cell) and 3%(13 GID's) was 330 VDC (3.44 V/cell). I didn't have any desire to find turtle so that's not included. Referring back to my notes for the original battery when new, I can see that the new battery is holding a higher voltage at low charge ( old battery was 317VDC at 3%) but that;s the only difference I see.
Thanks for sharing.
SageBrush said:Ahh. Any chance of getting the same data on a post update car ?dwl said:To clarify, the data above is pre update.
prinzler said:I recently ran my 2016 Leaf (30KWH battery) to VLBW, and then got down to 6%, as indicated on the car’s display) and immediately charged it up at a Chargepoint station. After charging, the car’s display said I charged it to 100%.
The Chargepoint charger indicated that it had output 24.839 KWH for that session (from 6% to 100%). Merely taking those percentages. you’d expect that you could add 94% of the car’s total 30KWH by charging from 6% to 100%. But I only added in 82.3 % (24.839 / 30).
Would that be expected for a Feb. 2016 Leaf, or is it excessive?
(To confuse the issue a little more, the car currently shows 10 white and 2 red capacity squares (at the far right of the dash display), but when the battery was checked at 2 years last Feb., the readout from the dealer showed 11 bars for the “Current battery status” (capacity).
I am in California (central coast)WetEV said:Where are you at?
Do you have the latest BMS firmware (updated in the last couple of months)?
prinzler said:The Chargepoint charger indicated that it had output 24.839 KWH for that session (from 6% to 100%). Merely taking those percentages. you’d expect that you could add 94% of the car’s total 30KWH by charging from 6% to 100%. But I only added in 82.3 % (24.839 / 30).
Would that be expected for a Feb. 2016 Leaf, or is it excessive?
So let's say, for the sake of discussion, that the 30KWH battery has 27 KHW of usable capacity. When the indicator on the dash display reads 100%, is that 100% of 27KWH?JPWhite said:You do not get access to the full 30kWh in the LEAF, a certain percentage will be reserved at both the top end and bottom end of the battery, For example with the 2011 LEAF 21.3kWh of the 24kWh battery was available after accounting for reserve. This reserve is necessary to prevent premature wear of the battery at full or empty. I'm not sure what the usable capacity is for the 30kWH LEAF but I'd be surprised if it was anymore than 27kWH probably a little less.
prinzler said:I am in California (central coast)WetEV said:Where are you at?
Do you have the latest BMS firmware (updated in the last couple of months)?
The car had the battery controller reprogrammed in June [edit: 2018], if that's what you mean by BMS firmware.
Only if battery is at 100% SOH. The 100% reading on the dash relates to the maximum the battery can make available and that value in kWh will reduce as SOH declines. I understand the dash percentage is based on GIDs with the maximum being updated by the BMS.prinzler said:So let's say, for the sake of discussion, that the 30KWH battery has 27 KHW of usable capacity. When the indicator on the dash display reads 100%, is that 100% of 27KWH?JPWhite said:You do not get access to the full 30kWh in the LEAF, a certain percentage will be reserved at both the top end and bottom end of the battery, For example with the 2011 LEAF 21.3kWh of the 24kWh battery was available after accounting for reserve. This reserve is necessary to prevent premature wear of the battery at full or empty. I'm not sure what the usable capacity is for the 30kWH LEAF but I'd be surprised if it was anymore than 27kWH probably a little less.
WetEV said:prinzler said:I am in California (central coast)WetEV said:Where are you at?
Do you have the latest BMS firmware (updated in the last couple of months)?
The car had the battery controller reprogrammed in June [edit: 2018], if that's what you mean by BMS firmware.
Sorry for so many questions. I'm interested in how well the nominal 30 kWh batteries are doing.
Central coast of California seems to include both some fairly moderate climate places and some fairly hot climate places. Could you please indicate more?
How many miles on the car?
Battery firmware update:
https://insideevs.com/nissan-issues-software-fix-for-2016-17-leaf-battery-reporting-issues/
I’m getting way out of my league, as I don’t have the LeafSpy, and only kinda know what it does. But i think the situation is that 100% refers to max capacity which is/can be reduced by the margin reserve (= 27 Khw) as well as reduced SOH. At best, with perfect/ideal SOH, 100% only means 27kwh, at best?dwl said:Only if battery is at 100% SOH. The 100% reading on the dash relates to the maximum the battery can make available and that value in kWh will reduce as SOH declines. I understand the dash percentage is based on GIDs with the maximum being updated by the BMS.
prinzler said:I’m getting way out of my league, as I don’t have the LeafSpy, and only kinda know what it does. But i think the situation is that 100% refers to max capacity which is/can be reduced by the margin reserve (= 27 Khw) as well as reduced SOH. At best, with perfect/ideal SOH, 100% only means 27kwh, at best?dwl said:Only if battery is at 100% SOH. The 100% reading on the dash relates to the maximum the battery can make available and that value in kWh will reduce as SOH declines. I understand the dash percentage is based on GIDs with the maximum being updated by the BMS.
So what can we conclude about the state of my battery purely based on adding 24.839 KWH when charging from 6% to 100%, given a 27KWH capacity? If I'm adding in 92% of the 27KWH capacity (24.839 / 27) when charging 94% (6% to 100%), that would seem within the margin of error, or only a slight degradation, right?JPWhite said:prinzler said:I’m getting way out of my league, as I don’t have the LeafSpy, and only kinda know what it does. But i think the situation is that 100% refers to max capacity which is/can be reduced by the margin reserve (= 27 Khw) as well as reduced SOH. At best, with perfect/ideal SOH, 100% only means 27kwh, at best?dwl said:Only if battery is at 100% SOH. The 100% reading on the dash relates to the maximum the battery can make available and that value in kWh will reduce as SOH declines. I understand the dash percentage is based on GIDs with the maximum being updated by the BMS.
The 100% on the dash does modify to match the maximum current capacity. So when new, yes about 27kWh. As I understand it LEAFspy will indicate kWh remaining, but that also includes the bottom end reserve.
prinzler said:So what can we conclude about the state of my battery purely based on adding 24.839 KWH when charging from 6% to 100%, given a 27KWH capacity? If I'm adding in 92% of the 27KWH capacity (24.839 / 27) when charging 94% (6% to 100%), that would seem within the margin of error, or only a slight degradation, right?JPWhite said:prinzler said:I’m getting way out of my league, as I don’t have the LeafSpy, and only kinda know what it does. But i think the situation is that 100% refers to max capacity which is/can be reduced by the margin reserve (= 27 Khw) as well as reduced SOH. At best, with perfect/ideal SOH, 100% only means 27kwh, at best?
The 100% on the dash does modify to match the maximum current capacity. So when new, yes about 27kWh. As I understand it LEAFspy will indicate kWh remaining, but that also includes the bottom end reserve.
I suppose I'll keep monitoring the situation just in case a warranty replacement is in the works.WetEV said:. . . .
So my best guess is that you will miss the warranty, perhaps by quite a bit.
prinzler said:I suppose I'll keep monitoring the situation just in case a warranty replacement is in the works.WetEV said:. . . .
So my best guess is that you will miss the warranty, perhaps by quite a bit.
One odd bit that I mentioned earlier parenthetically: the car currently shows 10 white and 2 red capacity squares at the far right of the dash display, yet the print-out from the dealer's battery capacity status check from Feb. this year (@ 2-year check-up) showed 11 squares (blocks) for current battery status. Rounding error?
Gotcha.WetEV said:No, a result of the firmware update.
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