Dsinned wrote:
A lot of this is still essentially "guesswork". A range of 95 miles corresponds to a usable battery SoC of only ~32kWh, (not 35kWh as generally assumed after being fully charged in normal mode). However, calculating what 80% of a fully charged battery actually would be, results in 33.4kWh of usable capacity.
Yeah, there's definitely a lot of guesswork here, and I plan on eventually letting the user set what the full charge capacity is (or at least the % degradation applied to the nominal 35kwh.)
Quote:
Which of these charge capacities is more accurate, Toyota's published 35kWh or 33.4kWh (80% of 41.8kWh)? To be more conservative, the obvious answer is the latter, which in my case just so happens to correlate closer to my actual GoM range.
I'm assuming the 35kwh is the right answer here, but it's certainly up for debate. Coming from the LEAF world, it's reasonable to assume the normal charge is 80%, but I don't think Toyota has given any indication that it's supposed to be an 80% charge.
Quote:
Then there is battery capacity degradation over time as an influencing factor to be considered. I have only owned my car for the last 10 months. It has only been driven about 5000 miles, so I do not consider any cummulative battery degradation as yet very significant. However, RavCharge should probably still allow for degradation with some sort of time based multiplier to determine what corresponds to a 100% (normal) charge status. For example, -3% per year, or -0.1% per 500 miles, could be applied.
Yup, that's on my to-do list. Just gotta make sure all the core functionality is stable before I go breaking things...
Quote:
In any case, I feel RavCharge is a complete SUCCESS!!!
Thanks for the compliment. I feel like I've still got a ways to go to make sure I've ironed out all the bugs and added in a few more useful features before I'll declare victory, but I'm glad that it's mostly working out great so far!