Battery diagnostic test

[mlf]

Today a receive the result of my battery test diagnostic, i want to share the information with the forum to improve hour knowledge !!

My car has 16.000 km and is from april 2014!!!

The results

ID Elemente Minimal tension = 101
Total Battery tension = 327,6 v
Maxim module temperature = 17ºC
ID module maxim temperature = 0
Minimal module temperature = 16ºC
ID module minime temperature = 4
maxim internal resistence = 1,5 mohm
Min. internal resistence = 1,5 mohm
battery current capacity = 34,9 Ah
Battery remain capacity = 34,3 Ah
Batterry maximo input supply =18,25 Kw
battery maxima output supply =63,50 Kw

Sorry about my english

 

[Grigou]

Seems in excellent health indeed, that's a good new for you and all of us

 

[anko]

Seems in excellent health indeed,

How so?

 

[maby]

Seems in excellent health indeed,

How so?

Capacity looked a bit lower than I would have expected for its age...

 

[aitchjaybee]

jaapv had 36.3Ah @ 20,000Km ( http://www.myoutlanderphev.com/forum/viewtopic.php?p=9547 ) so i guess it is worth doing again in 6 mths to see if yours has a faster degradation, or if maybe yours had slightly less capacity on delivery (but "within tolerance levels") and isnt degrading much?

Thanks for sharing, the more of us that do gives greater info to all, I appreciate that. I will see if I can do the same - not because I'm concerned, but just to add to shared data. I'm at 12,000Km since July '14 but mine is almost all on EV (I charge at home and work, often do 50 miles a day on battery) and I've used the CHAdeMO chargers a lot, so I'm guessing my battery may have taken a bit more pounding. Is there a way of getting this through OBDII or does it need Mitsu dealer? I'm a long way from a dealer so hoping for a workaround.

 

[Grigou]

Seems in excellent health indeed,

How so?

All elements are in a good health (same resistance), and capacity is still almost the same (a few % different) than the theorical capacity of a new one, isn't it ?
IMHO ...

Would be happy if mine will have the same data after 9 months and 15 000 km

 

[maby]

All elements are in a good health (same resistance), and capacity is still almost the same (a few % different) than the theorical capacity of a new one, isn't it ?
IMHO ...

Would be happy if mine will have the same data after 9 months and 15 000 km

I thought the theoretical capacity at new was 40Ah - in which case this has lost more than "a few percent"

 

[user 258]

Hi,

Can someone clarify.

Jaapv previously stated, with a little authority, that the 12KWh is due to 300v x 40Ah. The above results, which from memory are similar to another posting, say 34.9Ah at 327.6v which equals 11.43KWh. This seems to me an important point when trying to determine how much capacity the traction battery has lost.

Kind regards,
Mark

 

[Kim]

With 80 cells at a nominal voltage of 3.7V, the pack equals a total nominal voltage of 296 Volts
Sometimes these cells are rated a little higher (like the LG's in my Fluence Z.E., at 3.75 V), in that case, they would sum up to 300 V exactly

When fully charged, the pack can have >330 Volts, but the capacity is calculated with the rated (nominal) voltage.

I would think, that the voltage of the "empty" battery is no lower than 240 Volts

 

[user 258]

Hi,

So, are we saying that the average voltage as the battery is discharged should be 300v which is where the 300v x 40Ah = 12KWh comes from?

Kind regards,
Mark

 

[Kim]

That's basically how it's calculated, right.
Although I don't think that "average voltage" is the correct technical term.
Well, but maybe it is in English?!?

 

[gwatpe]

Today a receive the result of my battery test diagnostic, i want to share the information with the forum to improve hour knowledge !!

My car has 16.000 km and is from april 2014!!!

The results

ID Elemente Minimal tension = 101
Total Battery tension = 327,6 v
Maxim module temperature = 17ºC
ID module maxim temperature = 0
Minimal module temperature = 16ºC
ID module minime temperature = 4
maxim internal resistence = 1,5 mohm
Min. internal resistence = 1,5 mohm
battery current capacity = 34,9 Ah
Battery remain capacity = 34,3 Ah
Batterry maximo input supply =18,25 Kw
battery maxima output supply =63,50 Kw

Sorry about my english

The battery in my PHEV was tested a short time after delivery. around 2-3000km.
At 86%SOC, the voltage was 328.9V and 32Ah.
At 75%SOC, the voltage was 308.9V and 1.5mOhm.

The data you presented above is for the battery tested at the state of charge at the time. Without the %SOC the Ah has no real meaning. The ID Elemente Minimal tension = 101 I hope is a battery cell and not a voltage.

My battery showed a 20V drop for a 10%change in %SOC. If the drop in voltage is linear with %SOC decrease, then the battery in my PHEV would be 288V @ 64%SOC and 268V @ 53%SOC and 248V @ 42%SOC and 228V @ 31%SOC and 208V @ 20%SOC. This is probably a significant reason why my PHEV was replaced and why the EV range was so restricted.

I would be requesting a full report on the battery if I had to pay money for it.

PS edit: Just remember that the MUT3 diagnostics are for a battery pack at rest. Once current is in the equation, the terminal voltages measured will be affected and these impact on the protection systems controlling the battery. The 1.5mohm is per cell, and there are 80 series cells in the battery, and at full power of 60kW, this is 200A or more, so this comes to over 20V of voltage sag that impacts on the computer decision of how power is managed in this condition.

 

[mlf]

Today a receive the result of my battery test diagnostic, i want to share the information with the forum to improve hour knowledge !!

My car has 16.000 km and is from april 2014!!!

The results

ID Elemente Minimal tension = 101
Total Battery tension = 327,6 v
Maxim module temperature = 17ºC
ID module maxim temperature = 0
Minimal module temperature = 16ºC
ID module minime temperature = 4
maxim internal resistence = 1,5 mohm
Min. internal resistence = 1,5 mohm
battery current capacity = 34,9 Ah
Battery remain capacity = 34,3 Ah
Batterry maximo input supply =18,25 Kw
battery maxima output supply =63,50 Kw

Sorry about my english

The battery in my PHEV was tested a short time after delivery. around 2-3000km.
At 86%SOC, the voltage was 328.9V and 32Ah.
At 75%SOC, the voltage was 308.9V and 1.5mOhm.

The data you presented above is for the battery tested at the state of charge at the time. Without the %SOC the Ah has no real meaning. The ID Elemente Minimal tension = 101 I hope is a battery cell and not a voltage.

My battery showed a 20V drop for a 10%change in %SOC. If the drop in voltage is linear with %SOC decrease, then the battery in my PHEV would be 288V @ 64%SOC and 268V @ 53%SOC and 248V @ 42%SOC and 228V @ 31%SOC and 208V @ 20%SOC. This is probably a significant reason why my PHEV was replaced and why the EV range was so restricted.

I would be requesting a full report on the battery if I had to pay money for it.

PS edit: Just remember that the MUT3 diagnostics are for a battery pack at rest. Once current is in the equation, the terminal voltages measured will be affected and these impact on the protection systems controlling the battery. The 1.5mohm is per cell, and there are 80 series cells in the battery, and at full power of 60kW, this is 200A or more, so this comes to over 20V of voltage sag that impacts on the computer decision of how power is managed in this condition.

They gave me only to 2 Pages of 3!!! And told me that the batttery should Be full to run the test.... Near 100% Soc !!! You are telling that they should do the MUT3 test on a los Soc???
I will ask another Mitsubishi dealer to run the test again!!!
Thanks

 

[gwatpe]

Hi mlf,

the battery %SOC should be provided as part of the test report. Ah alone is not enough for any comparisons, unless the report is intended to be misinformation.

 

[mlf]

Hi mlf,

the battery %SOC should be provided as part of the test report. Ah alone is not enough for any comparisons, unless the report is intended to be misinformation.

Thanks gwatpe
I will go to another dealer and ask for a new test !!!

 

[Grigou]

All elements are in a good health (same resistance), and capacity is still almost the same (a few % different) than the theorical capacity of a new one, isn't it ?
IMHO ...

Would be happy if mine will have the same data after 9 months and 15 000 km

I thought the theoretical capacity at new was 40Ah - in which case this has lost more than "a few percent"

You are right, I have made a mistake