I'm not sure why this keeps coming back to roost. Some people on this list may recall the same conversation back in the spring of 2011, where I contacted Nissan about the 80% issue. I received a phone call from one of the engineers in Tennessee. He understood my confusion and expressed some frustration at their end, explaining that they designed the on board battery management system to protect the batteries. Doing so by never letting the batteries charge above 80% (which shows as the full 100% on the instrumentation), and never discharging below 20% (which shows as 0%). Explaining that if you let the battery pack get below 10%, it would typically brick (not allow a charge), and above 90%, that your could experience a thermal even ( Thermal runaway & fire). The final recommendation from him was to discharge the pack to 10 miles or so in range (according to the instrumentation), and fully recharge about once a month to "refresh" the battery. I followed his advice, and after 39 months and 56,000 miles, (the end of the lease), the pack was still above 98% capacity, which seemed to surprise the service department at the dealership where we turned it in at. I suspect that some of the degradation that we experienced may have been due to some of the fast chargers that we used toward the end of the lease, but have no way to be sure of that.
Tom True On Tue, Oct 4, 2016 at 11:39 PM, Cor van de Water via EV <ev@lists.evdl.org> wrote: > Let's try that *with* the link: > https://techcrunch.com/2016/09/29/tales-from-a-tesla-model-s-at-200k-mil > es/ > > > Cor van de Water > Chief Scientist > Proxim Wireless > > office +1 408 383 7626 Skype: cor_van_de_water > XoIP +31 87 784 1130 private: cvandewater.info > > http://www.proxim.com > > This email message (including any attachments) contains confidential and > proprietary information of Proxim Wireless Corporation. If you received > this message in error, please delete it and notify the sender. Any > unauthorized use, disclosure, distribution, or copying of any part of > this message is prohibited. > > > -----Original Message----- > From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Cor van de > Water via EV > Sent: Tuesday, October 04, 2016 11:28 PM > To: Electric Vehicle Discussion List > Subject: Re: [EVDL] To fully charge or not to fully charge that > isthequestion > > Here is the article about the 200k mi Tesla (in 1 year) Note that > Tesloop is actually aiming at putting 400k mi on their cars each year, > so the 8 year warranty on battery and drivetrain would give them ~3 > million miles under warranty... > Their website has a blog with a few of the details, including an early > front motor replacement under warranty. > > Cor van de Water > Chief Scientist > Proxim Wireless > > office +1 408 383 7626 Skype: cor_van_de_water > XoIP +31 87 784 1130 private: cvandewater.info > > http://www.proxim.com > > This email message (including any attachments) contains confidential and > proprietary information of Proxim Wireless Corporation. If you received > this message in error, please delete it and notify the sender. Any > unauthorized use, disclosure, distribution, or copying of any part of > this message is prohibited. > > > -----Original Message----- > From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Cor van de > Water via EV > Sent: Tuesday, October 04, 2016 2:06 PM > To: Willie2; Electric Vehicle Discussion List > Subject: Re: [EVDL] To fully charge or not to fully charge that is > thequestion > > Willie, > Not dynamically, just a one-time upgrade (dealer visit required). > Many Leaf owners who lost the 4th bar and thought they qualified for the > warranty battery replacement were miffed to see the dealer really > enforcing the Nissan requirement that the warranty will only be honored > after the mandatory re-calibration of the 12 battery bar gauge. Most > owners found out that after re-calibration their earlier 4 bar loser no > longer showed 4 bars lost so they no longer qualified unless they would > again see 4 bars lost on the re-calibrated gauge. The first bar does not > disappear until 15% is lost and each subsequent bar should stand for > 6.25% so in theory you need a battery degraded to just over 66% of > nominal capacity to qualify if the gauge will indeed drop to 4 bars > right at that point. But reports I have seen of Ah capacity degradation > suggest that the loss of the 4th bar happens later. > I found it significant that Leafs can lose more than 40% capacity in > about 50k mi while some Tesla drops only 6% in 200k mi. > > Of course this is only one sample with a specific usage pattern, but I > highly doubt an expansion of the samples will give different results, > we'll see. > > Cor van de Water > Chief Scientist > Proxim Wireless > > office +1 408 383 7626 Skype: cor_van_de_water > XoIP +31 87 784 1130 private: cvandewater.info > > http://www.proxim.com > > This email message (including any attachments) contains confidential and > proprietary information of Proxim Wireless Corporation. If you received > this message in error, please delete it and notify the sender. Any > unauthorized use, disclosure, distribution, or copying of any part of > this message is prohibited. > > > -----Original Message----- > From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Willie2 via EV > Sent: Tuesday, October 04, 2016 11:18 AM > To: Electric Vehicle Discussion List > Subject: Re: [EVDL] To fully charge or not to fully charge that is the > question > > On 10/04/2016 12:29 PM, Cor van de Water via EV wrote: > > on the battery as the Leaf *does* degrade its battery by 40% to approx > > > 60% capacity in approx 50k mi in warmer climates (that is the point > > where Nissan gives a warranty battery replacement, even though they > > promised 70% but re-calibated the battery to lose the 4th bar around > 60% > > capacity and triggering the warranty if it occurs within the warranty > > limits for time and mileage.) > When I first got my Leaf, I was astonished at how crappy the > instrumentation is/was. Coming from the conversion world, I expected to > > see, or find out, how much energy went into the battery and how much > came out. Instead, I had these twelve "bars". Unacceptable granularity. > Later, I found the "bars" were not even of equal value. > After some pondering, I came to the conclusion that Nissan did things in > > that way to hide information from their customers. What other > explanation could there be? > > Even more astonishing is how Leaf owners accept the situation and speak > of almost meaningless "bars". I'm not surprised to learn that Nissan > dynamically recalibrates "bars" to manage their warranty threshold. > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ 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 > Read EVAngel's EV News at http://evdl.org/evln/ 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 > Read EVAngel's EV News at http://evdl.org/evln/ 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 > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/ > group/NEDRA) > > -- Remember, it is not that the glass is half empty, in reality, the glass is merely twice the size that it needs to be! -TNT'82 -------------- next part -------------- An HTML attachment was scrubbed... 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