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OrientExpress
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Re: Nissan issues software update to solve 30 kwh battery issues

Fri Jun 15, 2018 3:13 pm

bmw wrote:I By the way, the readings on my Leaf instrument panel and LeafSpy agree on miles/kWh.

In any case, I hope that the 30kWh battery is actually not so bad and the software will fix the problem.


That's because both the car and LEAFspy are relying on the calculated data that the BMC is providing, but that calculated data is not correct. The SW update corrects that with a correct calculations.

the 2016-2017 traction batteries have shown themselves to be very durable and having good heat tolerance, but that has been masked by the bad calculated data that the BMC is providing.

And just to reiterate, the SW fix does not change anything that has to do with DCFC charging profiles.
2018 LEAF SL
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2014 LEAF SV
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SageBrush
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Location: Colorado

Re: Nissan issues software update to solve 30 kwh battery issues

Fri Jun 15, 2018 3:32 pm

OrientExpress wrote:the 2016-2017 traction batteries have shown themselves to be very durable and having good heat tolerance,

Based on what ?
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Car is now enjoying an easy life in Colorado
3/2018: 58 Ahr, 28k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

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OrientExpress
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Re: Nissan issues software update to solve 30 kwh battery issues

Fri Jun 15, 2018 4:15 pm

Based on reality.
2018 LEAF SL
Gun Metalic
Delivery April 10 2018

Prior LEAF:
2014 LEAF SV
Ocean Blue
Delivery May 23 2014
50,000+ miles - all 12 bars - Same range as new - No warranty issues ever!

SageBrush
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Re: Nissan issues software update to solve 30 kwh battery issues

Fri Jun 15, 2018 4:28 pm

OrientExpress wrote:Based on reality.

Oh, I see.
No factual basis, no data --- just your "reality."
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Car is now enjoying an easy life in Colorado
3/2018: 58 Ahr, 28k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

LeftieBiker
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Re: Nissan issues software update to solve 30 kwh battery issues

Fri Jun 15, 2018 5:51 pm

That's because both the car and LEAFspy are relying on the calculated data that the BMC is providing, but that calculated data is not correct. The SW update corrects that with a correct calculations.

the 2016-2017 traction batteries have shown themselves to be very durable and having good heat tolerance, but that has been masked by the bad calculated data that the BMC is providing.


So then why has actual range been affected just as if the batteries were degrading rapidly? Are you saying that these cars have plenty of range left when the VLBW appears - say another 30+ miles?
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

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Nubo
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Re: Nissan issues software update to solve 30 kwh battery issues

Fri Jun 15, 2018 6:05 pm

OrientExpress wrote:I have found that in the majority of cases the way the car is operated and maintained by the driver has a much larger influence on the cars performance than the actual design of the hardware.


Can you elaborate? What mainenance items affect battery performance?
I noticed you're still working with polymers.

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OrientExpress
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Re: Nissan issues software update to solve 30 kwh battery issues

Sat Jun 16, 2018 8:28 am

Nubo wrote:
OrientExpress wrote:I have found that in the majority of cases the way the car is operated and maintained by the driver has a much larger influence on the cars performance than the actual design of the hardware.


Can you elaborate? What mainenance items affect battery performance?


I'm speaking generically for all automobiles. For BEVs how the car is operated tends to be the most important factor.
2018 LEAF SL
Gun Metalic
Delivery April 10 2018

Prior LEAF:
2014 LEAF SV
Ocean Blue
Delivery May 23 2014
50,000+ miles - all 12 bars - Same range as new - No warranty issues ever!

SageBrush
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Re: Nissan issues software update to solve 30 kwh battery issues

Sat Jun 16, 2018 8:42 am

LeftieBiker wrote:
That's because both the car and LEAFspy are relying on the calculated data that the BMC is providing, but that calculated data is not correct. The SW update corrects that with a correct calculations.

the 2016-2017 traction batteries have shown themselves to be very durable and having good heat tolerance, but that has been masked by the bad calculated data that the BMC is providing.


So then why has actual range been affected just as if the batteries were degrading rapidly? Are you saying that these cars have plenty of range left when the VLBW appears - say another 30+ miles?

Please do not confuse him with facts.
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Car is now enjoying an easy life in Colorado
3/2018: 58 Ahr, 28k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

rcm4453
Posts: 224
Joined: Thu Aug 13, 2015 5:35 pm
Leaf Number: 304133
Location: Wayzata, MN

Re: Nissan issues software update to solve 30 kwh battery issues

Sat Jun 16, 2018 8:50 am

OrientExpress wrote:
Nubo wrote:
OrientExpress wrote:I have found that in the majority of cases the way the car is operated and maintained by the driver has a much larger influence on the cars performance than the actual design of the hardware.


Can you elaborate? What mainenance items affect battery performance?


I'm speaking generically for all automobiles. For BEVs how the car is operated tends to be the most important factor.


Many members here so called "babied their batteries" and still had unacceptable degradation. Not so sure it's the consumer's fault. Besides if it is the consumer then you'd be seeing unacceptable degradation reports from other PHEV/BEVs like the Volt, Bolt EV and Tesla but you don't.

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OrientExpress
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Re: Nissan issues software update to solve 30 kwh battery issues

Sat Jun 16, 2018 9:01 am

LeftieBiker wrote:So then why has actual range been affected just as if the batteries were degrading rapidly? Are you saying that these cars have plenty of range left when the VLBW appears - say another 30+ miles?


The issue that the SW fix is addressing is the generation of incorrect data by the BMC that is used to determine battery health, and range. This source is used by several other systems and is assumed by those systems to be valid.

Everything that the car presents regarding the parameters is based on the calculations that are faulty. LEAF spy uses the faulty data, as does the battery health gauge, SOC, and range displays.

During the investigation stage of the 2016/17 cars that were presenting with accelerated degradation, Nissan took the batteries from those cars and bench tested them to see if they were actually degraded, and found that the batteries were in excellent health. This led Nissan to look to see why they were presenting with accelerated degradation in the car. This is when it was discovered that the calculations that the BMC was doing were faulty.

For your reading pleasure, here is a link that includes all of the dealer service center backgrounder info, as well as the customer communications.
2018 LEAF SL
Gun Metalic
Delivery April 10 2018

Prior LEAF:
2014 LEAF SV
Ocean Blue
Delivery May 23 2014
50,000+ miles - all 12 bars - Same range as new - No warranty issues ever!

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