shifty35
07-30-2008, 03:25 PM
Hey everyone!
About a month ago while crawling through a horrible slog caused by an overturned tanker (interstate shut down!) in some nasty summer heat, I managed to finally pop an IMA light. The car had exhibited recal behavior at about 2/3 SoC ever since I bought it, although I was fairly adept at keeping the pack topped off.
Honda replaced the battery and control modules no questions asked. All the previous recalls had already been performed, including the ECU replacements.
I now find that the SoC management routines are very, very different than what I was used to. The new pack has very nice, strong assist and recharges much faster under regen than the old toast pack.
The differences:
The old control method used to use a lot of hidden regen. While cruising along the highway at usual 50-60 mph speeds, the pack would slowly come up to one bar short of full while showing no bars of regen.
This doesn't happen anymore. It will happily cruise along, 2-10 bars down, and stay there with no intention of recharging. Normally my commute would result in quickly refilling any SoC lost the day before, but no more.
When the SoC drops to about 1/3 (the bottom of the battery icon) I get 2-3 bars of forced charge while lightly accelerating or cruising. This rapidly brings the charge back up to 2/3, where the forced charge is canceled. The only way to refill the top 1/3 is through braking regen, which I rarely have an opportunity to do - usually coasting to a stop in a FAS.
Thus, my SoC seems to stay between 2/3 and 1/3 full all the time, where it used to park at one bar from the top.
In addition, regen thermally limited (or something like that) much more than before. If attempting to rapidly charge the pack through braking regen, after 5-6 bars, it will not let you regen with the brakes, even when 5-6 bars from full. Very interesting.
Anyone with a new-ish pack notice this type of behavior?
About a month ago while crawling through a horrible slog caused by an overturned tanker (interstate shut down!) in some nasty summer heat, I managed to finally pop an IMA light. The car had exhibited recal behavior at about 2/3 SoC ever since I bought it, although I was fairly adept at keeping the pack topped off.
Honda replaced the battery and control modules no questions asked. All the previous recalls had already been performed, including the ECU replacements.
I now find that the SoC management routines are very, very different than what I was used to. The new pack has very nice, strong assist and recharges much faster under regen than the old toast pack.
The differences:
The old control method used to use a lot of hidden regen. While cruising along the highway at usual 50-60 mph speeds, the pack would slowly come up to one bar short of full while showing no bars of regen.
This doesn't happen anymore. It will happily cruise along, 2-10 bars down, and stay there with no intention of recharging. Normally my commute would result in quickly refilling any SoC lost the day before, but no more.
When the SoC drops to about 1/3 (the bottom of the battery icon) I get 2-3 bars of forced charge while lightly accelerating or cruising. This rapidly brings the charge back up to 2/3, where the forced charge is canceled. The only way to refill the top 1/3 is through braking regen, which I rarely have an opportunity to do - usually coasting to a stop in a FAS.
Thus, my SoC seems to stay between 2/3 and 1/3 full all the time, where it used to park at one bar from the top.
In addition, regen thermally limited (or something like that) much more than before. If attempting to rapidly charge the pack through braking regen, after 5-6 bars, it will not let you regen with the brakes, even when 5-6 bars from full. Very interesting.
Anyone with a new-ish pack notice this type of behavior?