hyperionmark
Posts: 131
Joined: Tue Jan 31, 2017 11:46 am
Delivery Date: 31 Jan 2017
Location: Nebraska

Re: 2015: Battery Data Report @ 100% Charge

Tue Dec 05, 2017 11:36 am

Gensan wrote:I do not recommend it to you guys, but the method I am using could be worth to try at your own risk.

1) Warming up the battery by QC. 8 temp-bar works better than 6 temp-bar in my experience.
2) Driving your Leaf with pressing and releasing the pedal repeatedly in B range. Hx will probably go up rapidly.
3) Once SOC hits 50% or below, increase of Hx will likely stop, but decrease will likely not happen.

Some Japanese Leaf folks are keeping up Hx high using this method. Some 24kWh owners retain Hx = 100%+ at 30k+ miles.

How are real world miles looking in those 30k vehicles? I'm below 90% SOH, but I can get over 100 miles on a charge as long as I'm not doing fast highway speeds.
My point is that these numbers are far from perfect and things like this are proving that they can be gamed.

Gensan
Posts: 6
Joined: Fri Dec 01, 2017 2:21 pm
Delivery Date: 20 Dec 2016
Leaf Number: 301602

Re: 2015: Battery Data Report @ 100% Charge

Tue Dec 05, 2017 2:23 pm

hyperionmark wrote:
Gensan wrote:I do not recommend it to you guys, but the method I am using could be worth to try at your own risk.

1) Warming up the battery by QC. 8 temp-bar works better than 6 temp-bar in my experience.
2) Driving your Leaf with pressing and releasing the pedal repeatedly in B range. Hx will probably go up rapidly.
3) Once SOC hits 50% or below, increase of Hx will likely stop, but decrease will likely not happen.

Some Japanese Leaf folks are keeping up Hx high using this method. Some 24kWh owners retain Hx = 100%+ at 30k+ miles.

How are real world miles looking in those 30k vehicles? I'm below 90% SOH, but I can get over 100 miles on a charge as long as I'm not doing fast highway speeds.
My point is that these numbers are far from perfect and things like this are proving that they can be gamed.


This is what I am questioning about too. Since I started using this method I had never charged to 100% with L1/L2. I need more experiments to make a conclusion about this.

As far as I know, there is a Japanese folk whose 65k miles odd 4-yr 24kWh LEAF could reach to 90 miles while SOC went from 100% to 19%. His feeling is that his SOH=90% LEAF does not seem giving him a fake value. I hope his feeling is true.

hyperionmark
Posts: 131
Joined: Tue Jan 31, 2017 11:46 am
Delivery Date: 31 Jan 2017
Location: Nebraska

Re: 2015: Battery Data Report @ 100% Charge

Tue Dec 05, 2017 3:26 pm

Without knowing what speed he did those 90 miles it is an irrelevant number.

Gensan
Posts: 6
Joined: Fri Dec 01, 2017 2:21 pm
Delivery Date: 20 Dec 2016
Leaf Number: 301602

Re: 2015: Battery Data Report @ 100% Charge

Tue Dec 05, 2017 4:54 pm

hyperionmark wrote:Without knowing what speed he did those 90 miles it is an irrelevant number.


His miles/kWh is more than 5.0 as he mentioned before since he rarely uses highways.

DaveinOlyWA
Posts: 12321
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 10 Nov 2016
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: 2015: Battery Data Report @ 100% Charge

Thu Dec 07, 2017 8:23 am

Gensan wrote:
hyperionmark wrote:
Gensan wrote:I do not recommend it to you guys, but the method I am using could be worth to try at your own risk.

1) Warming up the battery by QC. 8 temp-bar works better than 6 temp-bar in my experience.
2) Driving your Leaf with pressing and releasing the pedal repeatedly in B range. Hx will probably go up rapidly.
3) Once SOC hits 50% or below, increase of Hx will likely stop, but decrease will likely not happen.

Some Japanese Leaf folks are keeping up Hx high using this method. Some 24kWh owners retain Hx = 100%+ at 30k+ miles.

How are real world miles looking in those 30k vehicles? I'm below 90% SOH, but I can get over 100 miles on a charge as long as I'm not doing fast highway speeds.
My point is that these numbers are far from perfect and things like this are proving that they can be gamed.


This is what I am questioning about too. Since I started using this method I had never charged to 100% with L1/L2. I need more experiments to make a conclusion about this.

As far as I know, there is a Japanese folk whose 65k miles odd 4-yr 24kWh LEAF could reach to 90 miles while SOC went from 100% to 19%. His feeling is that his SOH=90% LEAF does not seem giving him a fake value. I hope his feeling is true.


Heating up the pack will allow it to store more charge but this is not preserving or renewing capacity. It only allows the charge in the battery to move easier. This "might" be ok in Winter but highly recommend you do not do this when it gets warm and I don't mean Summer time either.

As far as not charging to full on L1/L2; that is a valid concern and the warmer it gets, the greater the concern.

The statement of getting over 100 miles at street speeds is misleading and meaningless. Its easy to do 120 miles on a charge if you are averaging 20 mph on a steady drive.
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 (build 10/2016)"low water marks" 27,000 miles.363GID Ahr 79.13Hx95.17%kwh28.1QCs238,L2's 251
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

Gensan
Posts: 6
Joined: Fri Dec 01, 2017 2:21 pm
Delivery Date: 20 Dec 2016
Leaf Number: 301602

Re: 2015: Battery Data Report @ 100% Charge

Thu Dec 07, 2017 2:18 pm

Heating up the pack will allow it to store more charge but this is not preserving or renewing capacity. It only allows the charge in the battery to move easier. This "might" be ok in Winter but highly recommend you do not do this when it gets warm and I don't mean Summer time either.

As far as not charging to full on L1/L2; that is a valid concern and the warmer it gets, the greater the concern.

The statement of getting over 100 miles at street speeds is misleading and meaningless. Its easy to do 120 miles on a charge if you are averaging 20 mph on a steady drive.

I feel you are right. This method might be a cheat technique to make LEAF calculate its battery health condition good. Next question is how this method affect the real battery life or perhaps risk of catastrophic results.

I know that Hx stays unchanged if SOC on dashboard is 50% or below. Also, it seems like that using cruise control can prevent Hx from being decreased. As long as this won't cause any catastrophic results, this method might be a good one to keep up decent range. No one knows though...

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