Nissan Leaf

[dhanson865]

My coworker just lost his first bar on his 2012. He wasn't happy considering how few miles the car had. I had to explain that mileage doesn't matter much for Leaf battery degradation.

to quote Mike Walsh:

Main factors (in order of importance) when it comes to 2011/2012 LEAF battery degradation – HEAT (the big one); time; cycling.

I'd add that is likely true for 2013 and half the 2014s as well. Too early to say there is any improvement in the 2013 battery chemistry.

doing the math based on time instead of miles to it being an issue for me:

I'm at 81% SOH% (my coworker is at 85%)
If I'm losing 6% capacity a year* and 45% SOH is as low as I can comfortably go for my commute I have about 6 years left before I need to replace the battery.**

I figure well before 2020 I'll be able to buy a replacement battery from Nissan or a 3rd party for a couple of thousand and make this Leaf behave like new or better. (old battery was 24 kWh, current talk is that there will be a 30 kWh replacement battery available soon, and possibly better than that by the time I would be looking for a replacement)

It's possible I'll pay sooner than I hit 45% just for the convenience factor. It's also possible that my car is totaled in an accident before then. It's possible I'll want to buy a better car and sell this one for someone else to make the battery replacement decision.

For now I'm not worried about it. That's a decision I can make years down the road.

*I don't actually know what the rate of loss will be. So far in 3 years it is right at 19% so 6% a year is close enough for guesswork. I don't know if the first owner kept the car garaged or not. It may be that my degradation rate will match theirs or it may be slightly slower due to my cool garage.

**It remains to be seen if I can do my coldest winter drive on 40% SOC. If I could I'd be stuck charging on both ends of the drive and would have little leeway for unexpected events.

[NeilBlanchard]

Nissan Leaf With 250-Mile Range: Ghosn Shows R&D Car, Video At Annual Meeting



[youtube]https://

[dhanson865]

Originally Posted by NeilBlanchard

Nissan Leaf With 250-Mile Range: Ghosn Shows R&D Car, Video At Annual Meeting

I hope everyone understands the video of the hundreds of miles range leaf is a pipe dream, not a demonstration.

He said the video represents their eventual goal for someday down the road.

We also discussed on mynissanleaf.com that Japanese speed limits are much lower so the video shows a guy doing much lower speeds to achieve that range.

[dhanson865]

Originally Posted by NeilBlanchard

By the way, I just set a new personal best consumption: 195.88Wh / mile / 172MPGe. Woo hoo!

what tires are you running? Brand, style, size...

[NeilBlanchard]

I am running the stock Bridgestone Ecopia EP422 16" 205/55 tires that our '15 Leaf S came with. They are very low rolling resistance tires - quite similar to the Nokian Hakka R2 winter tires that we also have for this car.

[NeilBlanchard]

I think this is a new record distance for me, and it was the second best consumption, so far:

[MetroMPG]

Nicely done.

[dhanson865]

here is some log data from my trips with crappy non LRR summer tires

Date, Duration, dist mi, avg speed, Energy (Wh), Wh/mile, Miles/kWh, Regen (Wh)

05/16/2015  03:35	0.6	10.0	124	206.7	4.8
05/16/2015  16:28	6.8	24.8	1468	215.9	4.6
05/16/2015  06:42	2.5	22.4	444	177.6	5.6
05/26/2015  06:25	1.2	11.2	324	270.0	3.7
06/05/2015  07:17	1.9	15.7	330	173.7	5.8
06/05/2015  06:09	1.9	18.5	146	76.8	13.0
06/05/2015  06:27	1.9	17.7	522	274.7	3.6
06/17/2015  24:37	14.9	36.3	3276	219.9	4.5
06/23/2015  03:58	0.6	9.1	54	90.0	11.1
06/24/2015  23:38	14.9	37.8	3091	207.4	4.8
06/25/2015  22:55	14.9	39.0	3256	218.5	4.6
06/25/2015  26:46	14.9	33.4	3944	264.7	3.8
06/26/2015  14:26	3.7	15.4	614	165.9	6.0
06/26/2015  04:22	0.6	8.2	191	318.3	3.1
06/26/2015  09:55	3.1	18.8	699	225.5	4.4
06/26/2015  12:26	3.7	17.9	508	137.3	7.3
06/26/2015  12:03	2.5	12.4	874	349.6	2.9
06/27/2015  19:22	9.3	28.8	2307	248.1	4.0
06/27/2015  32:47	14.3	26.2	4023	281.3	3.6
06/28/2015  03:18	0.6	10.9	229	381.7	2.6
06/28/2015  02:25	0.6	14.9	178	296.7	3.4
06/28/2015  26:46	15.5	34.7	3442	222.1	4.5
06/29/2015  22:31	14.9	39.7	4348	291.8	3.4
06/29/2015  26:47	15.5	34.7	3558	229.5	4.4
06/30/2015  03:13	1.2	22.4	249	207.5	4.8
06/30/2015  26:36	14.9	33.6	3911	262.5	3.8
07/01/2015  21:32	14.9	41.5	3577	240.1	4.2
07/01/2015  26:37	15.5	34.9	3550	229.0	4.4
07/02/2015  23:16	14.9	38.4	3708	248.9	4.0	-359
07/02/2015  03:13	0.6	11.2	169	281.7	3.6	-56
07/02/2015  27:00	14.9	33.1	3604	241.9	4.1	-345
07/03/2015  08:38	3.1	21.5	603	194.5	5.1	0
07/03/2015  10:55	3.1	17.0	821	264.8	3.8	-77
07/03/2015  05:58	1.2	12.1	382	318.3	3.1	-77
07/05/2015  23:47	14.9	37.6	4596	308.5	3.2	-145
07/05/2015  03:40	0.6	9.8	288	480.0	2.1	-145
07/05/2015  02:37	0.6	13.8	232	386.7	2.6	-161
07/05/2015  27:18	14.9	32.7	3034	203.6	4.9	-516
07/06/2015  24:52	14.9	36.0	3956	265.5	3.8	0
07/08/2015  16:55	13	46.1	2323	178.7	5.6	-297
07/08/2015  25:58	14.9	34.4	4190	281.2	3.6	-271
07/09/2015  18:22	13	42.5	2658	204.5	4.9	-315
07/09/2015  49:33	21.7	26.3	5611	258.6	3.9	-756
07/10/2015  20:01	5	15.0	903	180.6	5.5	-236
07/12/2015  20:57	14.9	42.7	3960	265.8	3.8	-435
07/12/2015  20:11	11.8	35.1	3327	281.9	3.5	-290
07/13/2015  18:09	14.3	47.3	2608	182.4	5.5	-721
07/13/2015  01:42	0.6	21.2	130	216.7	4.6	-53
07/13/2015  20:49	13	37.5	2861	220.1	4.5	-381
07/14/2015  17:35	13	44.4	3834	294.9	3.4	-160
07/14/2015  04:44	1.2	15.2	-9	-7.5	-133.3	-387
07/14/2015  25:59	14.9	34.4	3470	232.9	4.3	-361
07/15/2015  22:16	14.9	40.1	4207	282.3	3.5	-194
07/15/2015  06:35	1.2	10.9	106	88.3	11.3	-368
07/15/2015  26:11	15.5	35.5	3338	215.4	4.6	-719

I didn't track regen data properly for a while so I blanked out any data I wasn't sure on the accuracy for that column.

I did add air to the tires around Jun 28th, minor adjustment higher to even out the PSI all around.

recent good trips to and from work around 5.5 miles per kWh one way and 4.5 the other.

Date, odometer, Duration, dist mi, avg speed, Energy (Wh), Wh/mile, Miles/kWh, Regen (Wh)

07/13/2015	40146.2	00:18:09	14.3	47.3	2608	182.4	5.5	-721
07/13/2015	40164.2	00:20:49	13	37.5	2861	220.1	4.5	-381

I did a small leg to test a charger that afternoon that I didn't bother quoting that accounts for the missing mileage home. That leg was 4.6 miles per kWh but the extra stop and start might account for some of the lower efficiency as well vs the to work trip.

The rest is partially elevation but primarily the extra AC use in the hot evening hours when I'm blasting the AC. I leave the garage with the car around 70F and use minimal AC on the drive to work. On the way home I'm blasting the AC on the hotter days.

The high was around 91F on the 13th but only in the upper 70s on the drive into work. Easily still in the upper 80s on the drive home with the car prebaked sitting on asphalt with no shade in the hottest part of the day. Wind speeds were around 2-6 mph most of the day with no rain.

[dhanson865]

I learned today that the logging app I'm using is rounding to or truncating on 1 km increments so the mileage in the data I'm getting is down to .6 mile increments. I haven't tested it to see if it has any more accuracy than that or if it is just doing the 1 km equals .6 mile inaccuracy on top of the granularity issue.

I did also get altitude changes in the log data so going forward I'll have altitude gain/loss per trip.

[P-hack]

dusted a mustang yesterday, he took the merging lane at a stoplight, I had the far lane. I hit it on the green and could hear his loud pipes at my 5:00 all the way to 45mph (his foot was way into it). Of course I ran out of steam, but he was waiting at the next light for a good 8 seconds while I coasted up. He opted out of a second hole shot contest