Peri, I selected the cheapest OBD2 that stated it supports the Leaf. There was a warning not to use rev 2 of the ELM327 as they cost-reduced the necessary 2nd CAN interface away But this actually states that it is rev 1.5 so that is good. All of $8.99 https://www.ebay.com/itm/ELM327/253856037016
Cor. Sent from Mail for Windows 10 From: Peri Hartman via EV Sent: Thursday, December 6, 2018 8:24 AM To: Electric Vehicle Discussion List Cc: Peri Hartman Subject: Re: [EVDL] poor 2011 Leaf performance So, Steve, are you inferring the the 3.2 miles / kWh number could be inaccurate? If it's reasonably accurate, it becomes irrelevant on how efficiently I'm driving (yes, stop & go makes a big difference). I agree, my capacity and remaining charge estimates may be off. That's where the LeafSpy would help. Again, anyone care to recommend a ODB2 device? Peri ------ Original Message ------ From: "Steve Heath" <[email protected]> To: "Electric Vehicle Discussion List" <[email protected]>; "Peri Hartman" <[email protected]> Cc: "Haudy Kazemi" <[email protected]> Sent: 06-Dec-18 8:00:26 AM Subject: Re: [EVDL] poor 2011 Leaf performance >There is another factor: 14 miles in one hour indicates to me a lot of >stop start running and this can have a serious effect on the efficiency >of the car. > >I do notice that stop start driving is not as efficient as cruising and >there is little or no regen on braking. End result is a 15% difference >is consumption in my experience. > >I can use less energy taking a longer route that has no speed bumps >compared to one with them where I have to slow down and accelerate >from. > >Although my car is a conversion, I do have very good coulomb counting >instrumentation of what goes out and into the batteries and on the >chargers and these agree within 1%. I also have a voltage system that >monitors the voltage and controls engaging Turbo mode if that will >force the battery voltage to drop below the BMS panic level. What is >interesting is that the coulomb counting is pretty well consistent but >the voltage representation can vary as much as 20%. LiION batteries >are very difficult to measure SOC from the voltage except for the two >extremes. > >So what happens is that the coulomb count is ok but the capacity >estimate from the voltage can and does vary. > >So add all these factors up and it can explain where the missing power >has gone. > >I would also expect to use more than 1 kw for heating. > >Definitely worth getting more accurate data. > > > >On 06/12/2018 15:23, Haudy Kazemi via EV wrote: >>Leaf owners can benefit greatly from the LeafSpy app (not free) and a >>quality bluetooth OBD2 adapter. They can then look at the detailed >>health >>and capacity stats in app. My guess is 9 bars would be about 16 kWh >>capacity. >> >>You may also be losing energy to sticky brakes. Some brake exercise, >>including using the parking/emergency brake may be in order. Brake >>issues >>are a common issue on gently driven vehicles with regen because the >>brakes >>don't get warmed/worked out much. >> >> >>On Wed, Dec 5, 2018, 13:11 Peri Hartman via EV <[email protected]> >>wrote: >> >>>Thanks, Collin. >>>That affirms one part of the "mystery": poor range in winter. >>>The other half - missing 3.5 kWh - still persists. >>>Peri >>> >>>------ Original Message ------ >>>From: "Collin Kidder" <[email protected]> >>>To: [email protected]; "Electric Vehicle Discussion List" >>><[email protected]> >>>Cc: >>>Sent: 05-Dec-18 9:13:32 AM >>>Subject: Re: [EVDL] poor 2011 Leaf performance >>> >>>>I have two leafs here - 2012 and 2013. The 2012 is lucky to get 40 >>>>miles of range in the winter. In the summer it's closer to 50 miles. >>>>The 2013 can drive somewhere in the range of about 40-45 miles in >>>>Winter and 60-70 miles in Summer. I wouldn't consider any of that to >>>>be great but that's how it is. As far as I've heard, the batteries >>>>they used in 2011 and 2012 were pretty bad and degrade very badly >>>>over >>>>time. By 2013 the batteries got better then more recently they got >>>>better again. >>>> >>>>I think there is an issue where the cells do very poorly in Winter >>>>and >>>>you don't get nearly the range you would calculate you should be >>>>able >>>>to get. Be very careful how far you drive in Winter with these >>>>things. >>>>I basically drive back and forth to work and charge when I get to >>>>work >>>>(there's a J1772 6kw charger here). I don't usually have to charge >>>>at >>>>home, even in Winter, even if I drive around a bit between home and >>>>work. But, I live 9 miles away from work so that's only 18 required >>>>miles to get back and forth. Still, driving 9 miles from work to >>>>home >>>>in Winter will easily take 20% charge, sometimes more. This agrees >>>>with my above guess. 9*5 would be 45 miles range at best. >>>> >>>>On Wed, Dec 5, 2018 at 11:27 AM Peri Hartman via EV >>>><[email protected]> >>>>wrote: >>>>>Cor, >>>>> >>>>>So, just to make sure I understand, you have 8 capacity bars, which >>>>>you're assuming is >>>>>100% - 15% - 3 * 6.25% = 66% of 24 kWh, or about 16 kWh, correct? >>>>> >>>>>In my case, with between 8 and 9 capacity bars, that would be >>>>>100% - 15% - 2.5 * 6.25% = 69%, >>>>>or 24 kwh * 69% = 16.5 kWh. >>>>> >>>>>My estimate for the range remaining doesn't change - I used the >>>>>table >>>>>in >>>>>the link below and did not assume them to be linear. So the rest of >>>>>my >>>>>calculations are unchanged. >>>>> >>>>>Still results in 3.5 kWh being "lost" somewhere. >>>>> >>>>>If someone local (Seattle) has a gid meter and is willing to lend >>>>>it, >>>>>I >>>>>might be able to get some more accurate extrapolations. At least >>>>>I'd >>>>>know the true capacity and the true amount of energy used, right? >>>>> >>>>>Peri >>>>> >>>>>------ Original Message ------ >>>>>From: "Cor van de Water via EV" <[email protected]> >>>>>To: "Electric Vehicle Discussion List" <[email protected]> >>>>>Cc: "Cor van de Water" <[email protected]> >>>>>Sent: 04-Dec-18 6:48:24 PM >>>>>Subject: Re: [EVDL] poor 2011 Leaf performance >>>>> >>>>>>Capacity bars are not linear. >>>>>>The 12 bar display is actually anything from 85% to 100% capacity. >>>>>>Below that, every bar stands for 6.25% if I am not mistaken >>>>>>(quoting >>>>> >from memory) >>>>>>So 7 bar capacity can be as low as 100 – 15 – 4 x 6.25% = 60% so >>>>>>less >>>>>>than 15kWh. >>>>>>Also, there is a reason it is called the GOM (Guess-O-Meter). >>>>>>My Leaf has 8 capacity bars. I can drive home and go from 12 >>>>>>quickly >>>>>to >>>>>>10 or 9 and then arrive home with only 6 or 7 bars left. >>>>>>Then drive to work starting with that half charge and arrive at >>>>>>work >>>>>>with still 3 bars left…. >>>>>>I have noticed that range bars are not linear, so you can’t say X >>>>>bars >>>>>>is so many kWh left. >>>>>>GIDs are a better measurement, so use LeafSpy and you can much >>>>>>better >>>>>>judge what your Leaf is doing. >>>>>>Hope this helps, >>>>>>Cor. >>>>>> >>>>>>Sent from Mail for Windows 10 >>>>>> >>>>>>From: Peri Hartman via EV >>>>>>Sent: Tuesday, December 4, 2018 6:13 PM >>>>>>To: Electric Vehicle Discussion List >>>>>>Cc: Peri Hartman >>>>>>Subject: [EVDL] poor 2011 Leaf performance >>>>>> >>>>>>Anyone want to take a stab at this mystery - poor performance of >>>>>>my >>>>>>2011 >>>>>>Leaf ? >>>>>> >>>>>>Temp about 45F >>>>>>Heat on: drawing average of about 1 kW >>>>>>"other systems" drawing about .25 kW >>>>>>Drove 14 miles, went from 12 range bars to 5 bars (full charge >>>>>>level >>>>>is >>>>>>9 capacity bars) >>>>>>Average 3.2 miles / kWh >>>>>>Duration about 1 hr. >>>>>>Driving pretty carefully - usually only 2 "balls" on the usage >>>>>>meter. >>>>>> >>>>>>For electrical systems, I estimate I used about 1.25 kWh. >>>>>>For traction, 14 / 3.2 = about 4.5 kWh >>>>>>Total: 5.75 kWh. >>>>>> >>>>>>According to >>>>>>https://electrolease.nz/blog/nissan-leaf-range-charts-and-tables.html >>>>>>5 bars equates to about 45% charge remaining. >>>>>> >>>>>>Assuming that the capacity bars are linear and I'm between 8 and >>>>>>9, >>>>>the >>>>>>battery should have somewhere near 17 kWh (24 originally). >>>>>> >>>>>>45% of that is about 7.5 kWh remaining charge. >>>>>>Add in what I've used, 5.75, makes 13.25 kW - but should be around >>>>>17. >>>>>>Plus extrapolating the mileage: 14 / 45% = 31 miles estimated >>>>>>total >>>>>>range. >>>>>> >>>>>>What happened to the other 4 kWh? >>>>>> >>>>>>And, am I the only one who get 31 miles per charge? This Leaf has >>>>>>had >>>>>>miserable winter range since the beginning. Still don't know why. >>>>>> >>>>>>Peri >>>>>>-------------- next part -------------- >>>>>>An HTML attachment was scrubbed... >>>>>>URL: >>>>>>< >>>http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20181205/ac242f27/attachment.html >>>>>>_______________________________________________ >>>>>>UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >>>>>>http://lists.evdl.org/listinfo.cgi/ev-evdl.org >>>>>>Please discuss EV drag racing at NEDRA >>>>>>(http://groups.yahoo.com/group/NEDRA) >>>>>> >>>>>> >>>>>>-------------- next part -------------- >>>>>>An HTML attachment was scrubbed... >>>>>>URL: >>>>>>< >>>http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20181204/67c9fb0f/attachment.html >>>>>>_______________________________________________ >>>>>>UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >>>>>>http://lists.evdl.org/listinfo.cgi/ev-evdl.org >>>>>>Please discuss EV drag racing at NEDRA >>>>>>(http://groups.yahoo.com/group/NEDRA) >>>>>> >>>>>_______________________________________________ >>>>>UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >>>>>http://lists.evdl.org/listinfo.cgi/ev-evdl.org >>>>>Please discuss EV drag racing at NEDRA >>>>>(http://groups.yahoo.com/group/NEDRA) >>>>> >>>_______________________________________________ >>>UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >>>http://lists.evdl.org/listinfo.cgi/ev-evdl.org >>>Please discuss EV drag racing at NEDRA ( >>>http://groups.yahoo.com/group/NEDRA) >>> >>> >>-------------- next part -------------- >>An HTML attachment was scrubbed... >>URL: >><http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20181206/500b6fe9/attachment.html> >>_______________________________________________ >>UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >>http://lists.evdl.org/listinfo.cgi/ev-evdl.org >>Please discuss EV drag racing at NEDRA >>(http://groups.yahoo.com/group/NEDRA) >> > _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) -------------- next part -------------- An HTML attachment was scrubbed... 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