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There are some positive stories in this thread with Nissan finding weaknesses in the battery and replacing. It seems important to get a Nissan tech to experience the condition which I believe is much more obvious at cold battery temperatures (not too late in season yet) and medium to lower SoC...

The problem isn't a drop in predicted range which is expected under extended load but a rapid drop in the reported SoC remaining. For my example, the specific hill and load may have the SoC dropping 1% say every 20 seconds when battery was warm and could deliver sustained current, whereas when...

If you believe it may also error at higher SoC when cold, I would suggest trying to do the test at medium SoC (eg. 40-50%) as if it can throw an error code then there is less argument that you were trying to draw a heavy load off a battery without much charge. Nissan will be reluctant to repair...

Your Hx of 65% is low and there is debate about the importance of this metric. I assume that the graph is under heavy load (a landscape view of LeafSpy would show current) as the voltage is very low for over 50% SoC. For my 2018 I did this load test (when warmer) and the cell voltages are a lot...

You did well to invoke a more serious issue that became more obvious to the dealer. These cell faults may only be revealed under load conditions and dealers seem poorly placed relying on scan tools on the workshop floor. If they won’t accept LeafSpy logs, a video of the dash showing the SoC...

In terms of the warranty wording it may be difficult to challenge as it is a performance issue rather than just capacity. In the case here in New Zealand a new motorway is the main state highway heading into the capital city with a long steep climb and 100kph speed limit. With our consumer...

As mentioned above, the charge is still in the cells but a few of them cannot deliver the required power without the voltage dropping significantly. If the load is sustained the voltage drop will continue and when below cutoff voltage the car will shutdown. The SoC % reading is signalling the...

I have experienced this problem on a 2018 during a long steep climb when battery cold and slowing down the BMS calculation is not an answer. The problem is the weaker cells contain charge but cannot deliver sufficient power to meet demand and the cell voltage drops. When the cell voltage drops...

Unfortunately this problem is not uncommon where there are loads such as long steep hills. I have had it on my 2018 and a local survey here in New Zealand showed for the same highway which requires about 3 minutes of power at around 50-60kW that several other 40 kWh cars have same issue, The...

The diagnostic tests probably don’t include performance under load. With the 40kWh Leafs in New Zealand we are just starting to see problems with 2017 models when trying to climb a long steep motorway at 100kph. The video here at https://youtu.be/byuWVpr-HUk documents what happened where the...

If the issue is intermittent, could you please confirm that when it occurs the result is on-going loss of normal brake action until codes are cleared and 12V disconnected. A temporary loss of comms is one thing but for it to extend to continuing failure until resets are done is another level...

Very interesting insights. If your car is a 2015 with these issues, is it not covered by Nissan under warranty and resolution could be sought? I would be very nervous about having my car with an expectation that the same issue would resurface multiple times.

This doesn’t seem right to me where the car was already powered on and had been driving normally. Unless there was a failure of the DC-DC inverter why would a weak 12V battery suddenly cause this change (brakes operating normally and then not)? Many faults get attributed to the 12V, which is...

The 24kWh warranty replacements in Australia are reportedly being delivered with 93-95% SOH. http://ozleaf.proboards.com/thread/398/replacement-battery-pack?page=7&scrollTo=14704. These might still be new packs with some calendar ageing but they aren’t 100%.

Your Hx is well below the reported results we see here in New Zealand so unfortunately into unknown territory. I note from your signature you had 83% SoH after update which would indicate a higher Hx but this may be a good example of how Hx might diverge under different conditions and the...

This graph from our Flip The Fleet mathematician has been shared on a local Facebook page (https://www.facebook.com/groups/160400321468913/) and may be of interest to this group. It seems usual to not see any significant change in Hx from the update and this is to help provide an indication of...

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.

This is great work. Can you please clarify the sampling rates now possible and when this version might be released?

Great news. This parameter is confusing and your efforts with LeafSpy are really appreciated. The following data from the https://flipthefleet.org/ database might help understand the spread we are seeing here in New Zealand. The labels may be confusing where Gen1 are MY2011-2012 and Gen2 are...

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...