Climate Prep using scheduler not working

It did from 2:55 to 3:00:

The current draw from 2:55 to 3:00 was trying to maintain battery charge while the climate system discharged the battery. That energy (11.6A * 5 minutes = 116Wh) is roughly half a mile worth of range saved. The extra 3 minutes from 3:00 to 3:03 takes it up to about 3/4 of a mile. The 7.7 amp top-off from 3:03 to 3:12 is questionable as to whether or not it added usable charge to the battery. If you count it, that would be another half mile of range saved.

Seems to me like leaving 3 minutes or so after climate prep ends would be optimal. The car would have little time to change temperature and you'd have full current for 8 of the 10 minutes of climate prep.

 

Here's what I used on my old 2012 PIP. I haven't had a chance to try it out on my Prime

Supco LLSU LOGiT Software and USB interface

Supco LCV LOGiT Current and Voltage Data Logger, 3" Length x 2-1/2" Width x 1-3/32" Height

 

you do notice the sun is shining in this picture

 

That's also why I'm waiting for warmer, sunnier weather

 

Won't climate prep also work using A/C? in the summer?

 

I'm parked outside so Probably in July I will need to

Posted via the PriusChat mobile app.

 

I am guessing that standing outside the locked car during the ten minutes of Climate Prep it's hard to know exactly what the A/C is doing, is that correct? If so, don't know if you have tried this yet but can you get in the car prior to when climate prep starts, as far as I know Climate Prep will still run as long as you don't open the doors. And if you could somehow position your Fluke meter where you can see it from inside the car. Or as an alternative maybe just have the windows rolled down, which as far as I know wouldn't stop climate prep from running. Realize that wastes heat but just for testing it would actually make the A/C run harder and longer which might be interesting in terms of gathering data.

 

I was just wondering if the A/C output (in this case heat) varied during the ten minutes, or if it was a constant heating level. I know you said you didn't hear any audible change, but since this a heat pump I wasn't sure how much can be deduced from that in terms of heat output at any particular moment. 46 degrees ambient temperature, heating the cabin to 72 degrees, a normal automatic climate control would start with high heat then steadily taper off as it progresses towards the target temperature. However this might use a different strategy than normal climate control since it also has a set ending time as a target. Since the system knows the target temperature, cabin temperature and outside temperature, it could calculate how much heat is needed and only run max heat for that amount of time. In this example it would do nothing for the first five minutes then run max heat for the last five minutes. Which would be more efficient as you would lose less of your heat investment prior to departure.

So following my theory, then of course the next question is then why would the fans be running from 2:50 to 2:55? I don't know, maybe they just decided there are so many variables they will just run the fans the entire time since that uses so little power and it's getting that from the grid anyway. And anyways if my theory is not correct, then we flip the question around - why was it not drawing any appreciable power from the grid from 2:50-2:55pm if it was heating the car during that time, and instead using the battery? I think that makes even less sense.

 

How about this from OM page 259?

 

I'm sure others will be experimenting to see how this works and hopefully reporting the results like you did. I think the tests that you already did were interesting and provided some good insight.

 

I'd say this is correct, while I did not analyze the charging/climate prep evolution to your degree...on L2 the vehicle finishes charging about 20 mins prior to departure, the vehicle then starts climate prep 10 mins after that, the vehicle's 3 LED SOC dashboard lights remain constant ON. My L2 EVSE blinks indicating power is being used until climate prep finishes. This is my particular experience with the car. My Chevy Spark EV also only used the grid to prepare the cabin.

 

Ok, I just finished logging the voltage and current from my Prime. EV level at startup 1.1 miles. duration of test 8.0 hours.

 

Since the outside temperature was 59 degrees today and now it's 45 degrees I don't see any evidence of the battery warmer kicking in.those vertical line intervals I think is the charger making periodic checks of the battery status. Same thing that occurs with the 2012 and 2015 PIP.

 

8V of voltage drop at only 10.57A? Yikes.