tag:blogger.com,1999:blog-6875771813122616391.post3207574440905678448..comments2023-08-19T22:42:27.817-07:00Comments on chevy spark ev UNOFFICIAL blog: Battery capacity estimatesparkevhttp://www.blogger.com/profile/04362518920979349841noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-6875771813122616391.post-84775099647034310702015-10-19T17:06:08.120-07:002015-10-19T17:06:08.120-07:00Sorry I wasn't clear enough. The car only sho...Sorry I wasn't clear enough. The car only shows soc %, it doesn't show capacity. You can get an app and a OBDII wireless adapter and it will read a unit called a "GID" from your car's computer, which is a pretty close estimate of your battery's capacity (I do not have this though). The DCFC unit itself has some sort of additional information screen that can only be accessed by a technician - that is how I found out that on June 18, 2015, my battery capacity was 20.7 kWh (usable).<br /><br />As to my degradation, it is definitely not linear, that much has been established. And you are right, I avoid leaving my car at high soc %; I have the charge timer set so that it doesn't start until the early hours of the morning and finishes just before I leave on my commute. I have DCFC'd about a dozen times, but real-world data on the Leaf has shown that whether you use DCFC or L2 charging has less of an impact than was originally expected. http://www.mynissanleaf.com/viewtopic.php?f=27&t=14271<br /><br />Ambient temperature your car is used in, stored in, and what level you leave the soc at seems to have far more influence. Hopefully with your thermally managed battery pack you won't have to worry about these things!Andrewhttp://kootenayevfamily.canoreply@blogger.comtag:blogger.com,1999:blog-6875771813122616391.post-56095808356286236322015-10-19T06:32:32.495-07:002015-10-19T06:32:32.495-07:00I didn't know Leaf shows you available kWh. Th...I didn't know Leaf shows you available kWh. That certainly makes it easy to find batteryy capacity.<br /><br />I don't think ambient temperature in SoCal in spring would matter much for SparkEV with liquid cooled battery. It's always sunny at 20C degrees. But I can see how that can complicate matters for Leaf, especially in Canada.<br /><br />I think 8% degradation depends on profile. If it's linear, it's seems bad. But if it's inverse exponential, that could be pretty good. If you're driving so many miles and using L2, you might be doing good for the battery. LiIon tend to degrade quicker if it's sitting at high SoC, so your driving much would mean you don't let it sit at high SoC. You also don't use DCFC often (twice?), so that's another benefit to the battery.<br /><br />I've driven the SparkEV less than 5000 miles, so I don't see any degradation in range even with all the DCFC I do.sparkevhttps://www.blogger.com/profile/04362518920979349841noreply@blogger.comtag:blogger.com,1999:blog-6875771813122616391.post-80662268809509354762015-10-18T21:18:14.491-07:002015-10-18T21:18:14.491-07:00Do you know how wide the operating range of temper...Do you know how wide the operating range of temperature is for your battery? The ambient temperature + driving/charging profile can significantly change the amount of energy I have available from my Leaf throughout a day. I might start with an estimated 19kWh available, and after some driving/charging events with my battery "warmed up" (shown as going from 5 battery bars to 7 in my Leaf, or say +5C in the AM, up to +40C later on - see http://www.electricvehiclewiki.com/Battery#Battery_Temperature_Gauge for data), I might have a little over 20kWh available!!<br /><br />As to total available capacity, on my 1 year old Leaf, with ~45,000 km, at a charger in June where a technician was on-hand with capability to view more data in the DCFC unit, he reported to me that on that day, my battery capacity was 20.7 kWh (reported with 5 battery bars and ambient temp of ~20C when I plugged in). I believe it is generally accepted that a brand-new Leaf, in ideal conditions (eg. 70F) has about 22.5 kWh available of the 24 kWh (http://www.plugincars.com/battery-capacity-loss-it-really-about-location-location-location-127008.html). So for myself, I have experienced about 20.7/22.5 = 92% of original capacity, or about 8% degradation. For the amount of km's etc, that isn't too bad for a Leaf. Degradation should slow down now. I'm hoping to get a report like that again next year for comparison purposes.Andrewhttp://kootenayevfamily.canoreply@blogger.com