I don't think SOH and GIDs are related but AHr are GIDs are. My '15 has had 99% SOH but GID's have gone from 292 to 269 and AHr from 63 to 57.Valdemar wrote:I'm having a gid-related discussion elsewhere and someone who managed to reverse engineer the BMS firmware to the point of being able to know where the values are stored is claiming that the only parameter BMS knows that is directly related to the battery capacity is the SOH and the gids are directly calculated from it. It appears to be at least partially true based on the TickTock's tracking and reset history, but there must be some other correction algorithm which keeps the gids more or less in check should the actually capacity to be far off from the stored SOH. It does sound though that the AHr is basically SOH multiplied by some constant representing the initial known capacity.
It looks like the SOH is taken into consideration when the LBC calculates Gids. One case I read about some degraded modules were swapped out with ones that had more capacity which totally screwed Gid readings, the owner reported that he could get 40 miles after LBW due to the stored SOH being lower than the actual, at least initially. The increased Gid count in the 2 instances when TickTock's LBC was reset also support this theory. Of course it doesn't affect anyone under normal conditions as SOH is being monitored and constantly updated by the LBC so it is the real number, but any disturbance like module replacement or SOH reset w/o replacing the battery will cause Gids to be reported incorrectly until the true SOH value is determined.LeafMuranoDriver wrote: I don't think SOH and GIDs are related but AHr are GIDs are. My '15 has had 99% SOH but GID's have gone from 292 to 269 and AHr from 63 to 57.
Amazing that an Arizona 2011 LEAF with 37,000 miles hasn't already lost four capacity barsEvoforce wrote:... I won't be able to track this much longer, as my 2011 with 9 bars, is at the brink of change out with 42.17AHr.
what is amazing is that he has two 2011 LEAFs per his signature but does not distinguish between the two. have to think he is referring to the one that has not had a lizard battery replacement which makes his comments OT or assume he is talking about the one that did have a replacement already which makes his comment a bit less amazingTimLee wrote:Amazing that an Arizona 2011 LEAF with 37,000 miles hasn't already lost four capacity barsEvoforce wrote:... I won't be able to track this much longer, as my 2011 with 9 bars, is at the brink of change out with 42.17AHr.