If Hx is the average value of the battery resistance (mohms) over time and NOT the present value for the battery resistance,
(battery resistance changes with temp and over time), then Hx could possibly represent the average battery resistance
over time.
SageBrush said:Weasel wording aside, the verbiage that the throttling only kicks in with repeat QC stops is I suspect going to turn out to not be true on hot summer days (> 90F)
LeftieBiker said:If Hx is the average value of the battery resistance (mohms) over time and NOT the present value for the battery resistance,
(battery resistance changes with temp and over time), then Hx could possibly represent the average battery resistance
over time.
It's always been my guess that Hx represents the resistance (inverse resistance, more accurately) at the moment the reading is taken, while SOH is an average of Hx over time. If you take "H" to mean "Health" then this makes sense.
LeftieBiker said:I think that whatever Hx is, it's a momentary reading, while SOH is a longer term average. It appears that, barring a BMS reset, these two LeafSpy readings may allow a valid comparison of degradation between the 24, 30 and 40kwh packs.
DaveinOlyWA said:LeftieBiker said:I think that whatever Hx is, it's a momentary reading, while SOH is a longer term average. It appears that, barring a BMS reset, these two LeafSpy readings may allow a valid comparison of degradation between the 24, 30 and 40kwh packs.
This is plausible. Hx changes frequently thru out the day. SOH? Not so much.
Hello, did you check your battery temperature when starting the quick charges?OrientExpress said:I've got an '18 LEAF SL this week, and tried some quick charges with it yesterday, here is the second QC I did which ran for 35 minutes. It did not seem any different from how my 2014 charges at this QC.
On Thursday we will be driving it from Monterey to South Lake Tahoe and back. That will be the real test I think.
Hello, did you check your battery temperature when starting the quick charges?
cwleaf2 said:Thanks for your rapid charging graph! This is exactly the same problem as we saw on your LEAF 2.0 in Europe.
Here are the numbers from Bjørn's 600 mile yesterday in Norway:
Second charge:
T1: 32,0º T2: 29,7º T3: 22,5º SOC: 16,1% Charge: 42.6 kW
T1: 40,4º T2: 38,9º T3: 30,6º SOC: 42,4% Charge: 44.4 kW
T1: 44,0º T2: 42,6º T3: 34,1º SOC: 54,3% Charge: 45.0 kW
T1: 47,9º T2: 46,6º T3: 37,9º SOC: 68,5% Charge: 36.2 kW
T1: 48,3º T2: 47,0º T3: 38,4º SOC: 70,8% Charge: 34.3 kW
Third charge:
T1: 45,4º T2: 41,8º T3: 32,6º SOC: 48,7% Charge: 22.1 kW
T1: 46,6º T2: 42,7º T3: 33,3º SOC: 56,1% Charge: 21.1 kW
Later charge:
T1: 41,0º T2: 34,4º T3: 23,5º SOC: 34,9% Charge: 25.9 kW
T1: 44,4º T2: 37,7º T3: 26,6º SOC: 54,7% Charge: 26.1 kW
T1: 46,0º T2: 39,2º T3: 28,5º SOC: 64,4% Charge: 26.0 kW
Latest charge:
T1: 37,1º T2: 29,6º T3: 18,4º SOC: 15,1% Charge: 30.9 kW
T1: 42,9º T2: 36,2º T3: 25,7º SOC: 52,2% Charge: 29.7 kW
T1: 44,4º T2: 37,8º T3: 27,6º SOC: 60,9% Charge: 29.2 kW
Last charge:
T1: 39,6º T2: 32,7º T3: 22,2º SOC: 21,8% Charge: 26.1 kW
T1: 42,3º T2: 35,3º T3: 24,8º SOC: 48,0% Charge: 26.4 kW
T1: 44,3º T2: 37,3º T3: 26,7º SOC: 59,2% Charge: 27.0 kW
LeftieBiker said:OrientExpress, can you post your charge rates in KW instead of amps? That would allow instant comparisons to what other drivers are seeing.
If you cannot multiply by 0.4 you have bigger problems than being lazy.LeftieBiker said:OrientExpress, can you post your charge rates in KW instead of amps? That would allow instant comparisons to what other drivers are seeing.
Isn't that Nissan's job?lorenfb said:After about eight pages of posts about the reduction of charging current during multiple successive charging sessions and the correlation with the battery temperature with the Leaf2 battery, isn't time to now to try and understand what the cause/causes might be?
LTLFTcomposite said:Isn't that Nissan's job?lorenfb said:After about eight pages of posts about the reduction of charging current during multiple successive charging sessions and the correlation with the battery temperature with the Leaf2 battery, isn't time to now to try and understand what the cause/causes might be?
Just multiply Volts X Amps shown on the charger screen to get kW, i.e. (38, 34, 25, 23, 12, 8 kW). The voltage in all cases is essentially
constant at about 390 volts, except when the QC is delivering 100 amps and the output voltage drops a little.
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