Android App to View / Reset SOH, Hx, Lx, Cx, etc...

[xboxice]

The reset is now tested on 40kWh env200 where it successfully reset to 100%. Do note that this reset method should not work on 2018+ LEAFs,

...resetting any values on a 2018 or newer Leaf will forever get your health stuck at 7 bars - I'm told this is not repairable. I don't have a 2018+ Leaf so ZERO testing has been done on these models. Nissan says not to do it. Best not reset a 2018+ BMS.

So dont try this one at home!

Thanks i was wondering if the place i bought my Leaf had reset the Odometer as leaf spy shows 50000 km but Car scanner shows 80000km and im suspicious because my Hx is only 67% and SOH looks alright at 86% i have load tested the pack at low SOC and the mv is 35-40mv Diff so i never really worried about it too much

 

[safetyuggs]

I'm curious how long it takes for SOH to fall back to its real value. Anyone here done some KM's since resetting SOH?

 

[Dala]

I'm curious how long it takes for SOH to fall back to its real value. Anyone here done some KM's since resetting SOH?

1 week and 120km and the SOH dropped almost 10%. This was the glitched 30kWh software still on the battery.

 

[safetyuggs]

Do you know what caused the AHr to update?

 

[Dala]

Do you know what caused the AHr to update?

Nope! Same reset run as on the Battery-Emulator

 

[konrin]

Do you know what caused the AHr to update?

I too had the amps/hours reset to a very minimal value when I reset the SOH to 100%. I tried different approaches to reset SOH - resetting on empty battery and full battery and in all cases the ampere/hours dropped very low. I solved this problem by connecting my OBD adapter directly to the BMS CAN line and resetting there. After that the Amp/hour was set to its maximum battery value of 24kwh. I have a 2011 ze0 with a repackaged battery from a ze1 40kwh.

 

[konrin]

and I have an assumption that vcm is somehow involved in this “error”, because in normal mode OBD is connected to CAR CAN line, and it is controlled by VCM and communicates with steel modules including BMS.

 

[TomaszP]

some time ago I reset soh with CAR SCANNER program
before reset it was 49% and 6 bar
new soh was calculated at 43% but bar remained at 6
today after resetting Your program the bar dropped from 6 to 4
Leaf 2013 24kwh USA
AHr was not reset to nominal values and the program refreshed the bars based on the AHr

 

[Slavcik77]

some time ago I reset soh with CAR SCANNER program
before reset it was 49% and 6 bar
new soh was calculated at 43% but bar remained at 6
today after resetting Your program the bar dropped from 6 to 4
Leaf 2013 24kwh USA
AHr was not reset to nominal values and the program refreshed the bars based on the AHr

Try like this, let about 2-3 kwt remain, go to Chademo, reset battery and put to charge till charging speed will drop to 6 kwt/h and finish to charge at AC till the end.
By the way one Chademo charge per month will keep the battery in good SOH even it will go up.

 

[Geduxaz]

Hi. Tried to reset. bars dropped to 4, i think i had 6... Whats the issue?

 

[DanielEV]

I just want to say thank you All. After almost 2 years of ownership and 60k km my 2013 24kWh US AZE0. My leaf has 170 350 km on the clock. I use LeafSpyPro from the day one when I bought it it was 110 000 km and 78% SOH. By now I have seen increases to about 81% SOH and about 18.1kWh of energy and decreasing to about 74.2% SoH and Hx of about 57%. Now is 75.1% SoH and Hx is 58.46%. The cells are still good and I think it‘s time for tests. Based on my experience I think after BMS reset SoH should increase to a least 80% steadily and for Hx it depends hugely on the battery temperature and the frequency of use. When I drive it rather slow and use QCs then L1 and again QC in one day 250 km, then the Hx increases after every charge and on the next day the SoH in up too. So I and thinking for resetting the BMS for the past 2 weeks. And yesterday I saw what you have done if the same time. Unfortunately on my android 10 phone I and v 0.05 the connect button doesn’t work. I will try tomorrow with another phone. I will keep you updated.
Thank you again! #safetyuggs; #dala and everybody else involved in this! You rock!

 

[TomaszP]

I reset the soh several times and each time it was recalculated to a lower value, it never increased

 

[krystoforos]

Success Nissan leaf 2012

 

[Slavcik77]

 

[Slavcik77]

Was reseted once with launch and once with Carscaner. I guess Launch erased data from LBC and restarted the counter. But in LeafSpy we see from VCM

 

[Lucky]

Let me add my two cents. My wife has 2016 Leaf with 30kWh battery. At 247,000km I replaced the almost dead cells with LG cells from MEB packs (VW) with unknown history. It all worked out and the car is operational for over a year now, range is hard to tell because my wife charges it up twice a week. SOH was reset then and fell to some realistic value of 72% or around 20kWh worth of storage. Hx is also bad because the cells are connected 96S1P and have over 1 miliohm internal resistance (per cell). I decided to test the app today and managed to reset the SOH and Hx. I also noticed that the battery bars dropped from 6 to 4. LeafSpy also reads the old charging counter and the battery is now detected as 24kWh and not 30kWh. I will attach some pictures in the same sequence as I captured them, maybe it can help.
Thanks for all the work, it is highly appreciated. There will be many in need for help now with Nissan obviously going broke.

 

[Geduxaz]

eset with the LBC,/ BCM module removed fro

 

[Geduxaz]

After unpluging 12V battery i got bars back to normal, and looks like no reset was done.

 

[safetyuggs]

I suspect in some models, there's a bit of math going on in the VCM regarding dash health bars. In my Gen1 it is directly tied to the SOH number as you can spoof the values in that packet on the can bus and have the dash change in real time - it also instantly jumps to 12bars after a SOH reset. Perhaps later models don't rely only on the SOH but also the AH value being reported, which is generated by the BMS during use.

The SOH and LxCx reset packets we send are identical to what Nissan sends using their obd2 hardware (I've had logs emailed to me from various people with the genuine hardware) so I suspect this behaviour may be normal until the BMS relearns the data?

As for the 24kwh detection vs 30, there's an option in leafspy to set battery capacity, but that will just adjust the reported AH in the app.

A SOH reset is more important to the BMS to clear learnt cell behavior when you replace cells, and less for dash bar health as that'll ultimately go back to where it should be given enough cycles.

 

[leafy greens]

Let me add my two cents. My wife has 2016 Leaf with 30kWh battery. At 247,000km I replaced the almost dead cells with LG cells from MEB packs (VW) with unknown history. It all worked out and the car is operational for over a year now, range is hard to tell because my wife charges it up twice a week. SOH was reset then and fell to some realistic value of 72% or around 20kWh worth of storage. Hx is also bad because the cells are connected 96S1P and have over 1 miliohm internal resistance (per cell). I decided to test the app today and managed to reset the SOH and Hx. I also noticed that the battery bars dropped from 6 to 4. LeafSpy also reads the old charging counter and the battery is now detected as 24kWh and not 30kWh. I will attach some pictures in the same sequence as I captured them, maybe it can help.
Thanks for all the work, it is highly appreciated. There will be many in need for help now with Nissan obviously going broke.

I do wonder if resetting the HX to close to 100 could possibly cause issues fast charging as the LBC could be requesting higher current than the cells could safely take,any thoughts on this? Or is there no concern here?