A value I would like to see added to SoulSpy is Battery Stress = Quadratic average of battery current flow.
The RMS is also known as the quadratic mean and is a particular case of the generalized mean with exponent 2.
'Battery Stress' is related to lower efficiency, and higher heat in the battery.
I believe it is also linked to degradation.
see :- Setting up Torque to show BMS data
warren55 wrote:... Yesterday I went for a long freeway drive ... I was a little concerned that during that drive my SOH seemed to drop from 107% to 103.7%. That seemed a little drastic to me.
langemand wrote:... I believe the drop came due to multiple top speed driving stints with fast-charging in rapid sequence, on the German Autobahn during the summer heat.
Normally the BMS updates the deterioration counters during charging, but occasionally we see extreme jumps in the counters during very fast driving. I believe this is linked to 'Battery Stress'.
JejuSoul wrote:...My conclusion is that driving very fast, or just fast up a steep hill causes high battery stress which can degrade the battery much faster than normal. This is not a problem if you only do it occasionally...
see :- Battery Ageing Model
The codes for using Torque Pro can be found by clicking the link in the website icon under my user name on the left.