ChozoGhost79
Posts: 52
Joined: Sat Dec 14, 2013 10:29 pm
Delivery Date: 19 Apr 2019
Location: Ridgecrest, CA

Re: Rapidgate on the 62 kWh Leaf Plus?

Thu Jul 18, 2019 12:21 pm

Temperature profile from LEAF Spy on my 62KWh LEAF on a round trip to Santa Clarita, CA from Ridgecrest, CA. Outside temps were 100-105. Definitely a problem with pack heating both driving and DC fast charging. The steep climb shortly after 13:00 is when I DC fast charged.



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cwerdna
Posts: 9688
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: Rapidgate on the 62 kWh Leaf Plus?

Thu Jul 18, 2019 12:27 pm

That's crazy that the battery temps were above 120 F.
(fixed typo)
Last edited by cwerdna on Thu Jul 18, 2019 1:08 pm, edited 1 time in total.

'19 Bolt Premier
'13 Leaf SV w/premium package (owned)
'13 Leaf SV w/QC + LED & premium packages (lease over, car returned)

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ChozoGhost79
Posts: 52
Joined: Sat Dec 14, 2013 10:29 pm
Delivery Date: 19 Apr 2019
Location: Ridgecrest, CA

Re: Rapidgate on the 62 kWh Leaf Plus?

Thu Jul 18, 2019 12:35 pm

cwerdna wrote:That's crazy that the back temps were above 120 F.
Yeah, at high ambient temps it just can't shed enough heat. I didn't notice any derating due to temperature on the way back, but I was driving carefully in order to get all the way back (I think 55-65 MPH on the freeways. I'll check when I get home to be sure).

SageBrush
Posts: 4799
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

Re: Rapidgate on the 62 kWh Leaf Plus?

Thu Jul 18, 2019 1:12 pm

ChozoGhost79 wrote:Temperature profile from LEAF Spy on my 62KWh LEAF on a round trip to Santa Clarita, CA from Ridgecrest, CA. Outside temps were 100-105. Definitely a problem with pack heating both driving and DC fast charging. The steep climb shortly after 13:00 is when I DC fast charged.
Please explain the ambient temps. Above you write 100 105F ambient but the graph seems to show a peak > 115F that then drops quickly. Was this the car report of ambient ?
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Two years in Colorado, now in NM
03/2018: 58 Ahr, 28k miles
11/2018: 56.16 Ahr, 30k miles
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2018 Tesla Model 3 LR, Delivered 6/2018

ChozoGhost79
Posts: 52
Joined: Sat Dec 14, 2013 10:29 pm
Delivery Date: 19 Apr 2019
Location: Ridgecrest, CA

Re: Rapidgate on the 62 kWh Leaf Plus?

Thu Jul 18, 2019 2:01 pm

SageBrush wrote:
ChozoGhost79 wrote:Temperature profile from LEAF Spy on my 62KWh LEAF on a round trip to Santa Clarita, CA from Ridgecrest, CA. Outside temps were 100-105. Definitely a problem with pack heating both driving and DC fast charging. The steep climb shortly after 13:00 is when I DC fast charged.
Please explain the ambient temps. Above you write 100 105F ambient but the graph seems to show a peak > 115F that then drops quickly. Was this the car report of ambient ?
Yes, it was the car's temperature readout. I'm not sure where the sensor actually is, but if the car sits, it goes up quite a bit.

lorenfb
Posts: 2248
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

Re: Rapidgate on the 62 kWh Leaf Plus?

Thu Jul 18, 2019 3:06 pm

cwerdna wrote:That's crazy that the battery temps were above 120 F.
(fixed typo)
Others have reported very similar results, especially after successive QCs and when compounded by driving at speeds greater than
50-55 MPH. The problem becomes exacerbated with the larger batteries, and to be expected from a BEV without TMS. Since the 40kWh
Leaf arrived, it's old news.
#1 Leaf SL MY 9/13: 74K miles, 48 Ahrs, 5.2 miles/kWh (average), Hx=70, SOH=78, L2 - 100% > 1000, temp < 95F, (DOD) > 20 Ahrs
#2 Leaf SL MY 12/18: 4.5K miles, 115 Ahrs, 5.5 miles/kWh (average), Hx=98, SOH=99, DOD > 20%, temp < 105F

ChozoGhost79
Posts: 52
Joined: Sat Dec 14, 2013 10:29 pm
Delivery Date: 19 Apr 2019
Location: Ridgecrest, CA

Re: Rapidgate on the 62 kWh Leaf Plus?

Thu Jul 18, 2019 3:20 pm

lorenfb wrote:
cwerdna wrote:That's crazy that the battery temps were above 120 F.
(fixed typo)
Others have reported very similar results, especially after successive QCs and when compounded by driving at speeds greater than
50-55 MPH. The problem becomes exacerbated with the larger batteries, and to be expected from a BEV without TMS. Since the 40kWh
Leaf arrived, it's old news.
Apparently new news for the 62 KWh. I wonder if Nissan is going to do anything about it, since it wasn't adequately communicated to prospective buyers, and they sold it as a much more useful vehicle than it is, even bragging about 100 KW fast charging capability. Retrofitting liquid cooling would require redesigning the battery pack, and probably an enlarged or second radiator for it, at minimum. It would probably involve some capacity loss to fit it all in the same space.

cwerdna
Posts: 9688
Joined: Fri Jun 03, 2011 4:31 pm
Delivery Date: 28 Jul 2013
Location: SF Bay Area, CA

Re: Rapidgate on the 62 kWh Leaf Plus?

Thu Jul 18, 2019 3:27 pm

I think we already know the answer here.... If one plans to drive long distances in hot climates, esp. with the need to DC FC when it's hot, get a car w/active battery thermal management.

Chozo: Is your Leaf Plus owned? If so, would be interesting to hear how the battery holds up. Kolmstead in your town on his '11 lost 4 bars a bit past his 5 year/60K capacity warranty expiration. See https://mynissanleaf.com/search.php?key ... mit=Search.

'19 Bolt Premier
'13 Leaf SV w/premium package (owned)
'13 Leaf SV w/QC + LED & premium packages (lease over, car returned)

Please don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

ChozoGhost79
Posts: 52
Joined: Sat Dec 14, 2013 10:29 pm
Delivery Date: 19 Apr 2019
Location: Ridgecrest, CA

Re: Rapidgate on the 62 kWh Leaf Plus?

Thu Jul 18, 2019 3:36 pm

cwerdna wrote:I think we already know the answer here.... If one plans to drive long distances in hot climates, esp. with the need to DC FC when it's hot, get a car w/active battery thermal management.

Chozo: Is your Leaf Plus owned? If so, would be interesting to hear how the battery holds up. Kolmstead in your town on his '11 lost 4 bars a bit past his 5 year/60K capacity warranty expiration. See https://mynissanleaf.com/search.php?key ... mit=Search.
Lesson learned for me then. If I get another EV it will be one with active battery thermal management.
My Leaf Plus is leased, so I have 3 years to see how much capacity is lost.

rogersleaf
Posts: 268
Joined: Sun May 18, 2014 7:50 pm
Delivery Date: 22 Mar 2019
Leaf Number: 307726
Location: Kent, Ohio

Re: Rapidgate on the 62 kWh Leaf Plus?

Thu Jul 18, 2019 6:51 pm

cwerdna wrote:That's crazy that the battery temps were above 120 F.
(fixed typo)
Tomorrow (Friday) it's expected to be in the high 90's in Ohio during my afternoon commute. Plan to watch Leafspy on my 40KWh during the return commute which is about 40 miles of continous expressway. Based on previous observations on 91-92* degree days, likely see 110 F battery temps with air temps in the high 90's. The thing I noticed is the pack does not shed heat after it's run hard. Pull a hill at 65-70 or aggressively pass a truck, it gets hot and stays there several hours. That can't be healthy. I'm too chicken to DCFC at those temps so won't see the spike like the graphic chart.
2014 SV - Brilliant Silver - returned 1/2017 at end of lease.
2019 SL - White - w/Tech Package

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