cmwade77
Posts: 42
Joined: Tue Nov 14, 2017 5:04 pm
Delivery Date: 15 Nov 2017

Re: Leaf Spy and Leaf Spy Pro

Tue Jan 16, 2018 3:21 pm

krox wrote:Can SOH and Hx be more than 100% ?! I saw the screenshots from the program, but it looked like it was Japanese cars. Why can the program show this? We have not met such indicators.
https://gyazo.com/ea3c13546a6abe74d7d5756f3f9b0640
https://gyazo.com/578ad055adf15fc14356d55ab3b8377d

Yes they can, at least mine is, it is currently showing around 102% for SOH.

Turbo3
Gold Member
Posts: 1868
Joined: Mon Jul 19, 2010 8:34 pm
Delivery Date: 12 May 2011
Leaf Number: 002191
Location: San Jose, CA

Re: Leaf Spy and Leaf Spy Pro

Tue Jan 16, 2018 10:30 pm

krox wrote:Can SOH and Hx be more than 100% ?! I saw the screenshots from the program, but it looked like it was Japanese cars. Why can the program show this? We have not met such indicators.
https://gyazo.com/ea3c13546a6abe74d7d5756f3f9b0640
https://gyazo.com/578ad055adf15fc14356d55ab3b8377d

Keep in mind that SOH and Hx are values found many years ago by Nissan users when the Leaf first came out. This means the exact meaning and scale (range) are not know to us. Only the Nissan engineers in Japan know the exact details of these numbers. Not even Nissan service people know about these numbers.

It was assumed the max raw value started with 1 followed by all zeroes. This seemed to have been correct on earlier Leafs but now we are seeing raw values greater than this resulting in percent values greater than 100.

Since I do not know what that max value is I can not make an adjustment to limit the display to 100%. Also, if I did make such a change people who have been using LeafSpy for years and tracking these values would all of a suddenly see a drop in the percentage of these values (which naturally drop over time) just because they updated to a newer version of LeafSpy with a different maximum raw value used to convert to percentage.

So it is best to leave things as they are with some people having starting values of over 100%. As their Leafs age the values will naturally drop below 100%.

If you recall the Space Shuttle which had improved rocket engines installed they would always throttle the engines to greater than 100% (105%?) on lift off which just meant the engines had greater power than the early engines. The raw max value had changed so the max percentage needed to change to indicate greater then 100% power relative to the old engines.

krox
Posts: 35
Joined: Wed Sep 14, 2016 12:46 pm
Delivery Date: 14 Sep 2013
Location: Ukraine

Re: Leaf Spy and Leaf Spy Pro

Wed Jan 17, 2018 12:53 am

Thank you, Jim. Does the testimony of the program affect the fact that the Leaf of different years of production, installed different VCM units? Leaf has a Hitachi block until 2013, Leaf after 2013 has Denso. And another question. Is it possible to say that if a Leaf with a mileage of 18,500 miles, SOH 100 or 102% - then the controller of the lithium-ion battery is someone "dumped" (zeroed)?

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