Is this Battery degradation normal?

[Walrusstooth]

I bought a 2015 leaf at the end of Septemberin SoCal. Previous owners babies the battery, 20% to 80% charging. I never fast charge it and only use a level 1 charger. For some reason my state of health has been dropping faster than expected, over 1% drop in less than a month seems high. Does this drop seem high?

 

[roussir]

No, it is normal to go down and back up by 1-2%, possibly due to temperature, and definitely a fast charge takes it up by a 1%

 

[sooleaf]

No, it is normal to go down and back up by 1-2%, possibly due to temperature, and definitely a fast charge takes it up by a 1%

Are you saying there is evidence that an occasional fast charge in the golden range is helpful to the battery? Today I did a Chademo from 46% to 74% the ambient temp was about 40F and it took about 14 minutes . In the 12k miles I've put on my 2013 leaf the SOH has dropped from 83% to 81%. Still 11 bars. 99% of that is charging from at least 30% towards a limit of 79% via 115V plug. I have used Chademo twice. Once to verify it works and once today. It was charging at 32% the whole time. If it's not too damaging that'd be great to do often for more range.

Edit 32Ah not %.

 

[Stanton]

You guys are focusing on the wrong metric: SOH (which can go up/down) is not nearly as important as AHr. The OP didn't say how many capacity bars he was down, but it has to be at least a couple at ~49 AHr.
And I wouldn't do a L3 charge on any Leaf unless it was cold outside; heat "kills" these battery packs. My 2 cents.

 

[Jerther]

And I wouldn't do a L3 charge on any Leaf unless it was cold outside; heat "kills" these battery packs. My 2 cents.

But also not TOO cold. The LEAF compensates by throttling the quick charging power down the colder it is (I've seen as low as a steady 11 kW) but I think it's best to avoid it when it's freezing.

Lithium plating and stuff.

I also understand we should avoid sustained high power draw in the same conditions for the same reasons. My 2 cents as well

 

[sooleaf]

I use OVMS instead of leaf spy and it has a reading of CAC. Mine is currently at 53.8Ah and I have 11 bars. Is this the same as AHr?

 

[WetEV]

Are you saying there is evidence that an occasional fast charge in the golden range is helpful to the battery? Today I did a Chademo from 46% to 74% the ambient temp was about 40F and it took about 14 minutes . In the 12k miles I've put on my 2013 leaf the SOH has dropped from 83% to 81%. Still 11 bars. 99% of that is charging from at least 30% towards a limit of 79% via 115V plug. I have used Chademo twice. Once to verify it works and once today. It was charging at 32% the whole time. If it's not too damaging that'd be great to do often for more range.

Edit 32Ah not %.

SOH is an estimate.

Diffferent driving and charging conditions can change the estimate, but don't seem to change the physical condition of the battery.

 

[Stanton]

I use OVMS instead of leaf spy and it has a reading of CAC. Mine is currently at 53.8Ah and I have 11 bars. Is this the same as AHr?

That sounds about right for 11 bars; I would also guess you are getting close to 10 bars.