Oilpan4
Posts: 1722
Joined: Wed Jan 09, 2019 10:51 pm
Delivery Date: 10 May 2018
Leaf Number: 004270

Re: QCs. How many are too many?

Wed Sep 23, 2020 5:25 am

Those newer 40kwh batteries like to cook when quick charged.

Cjb
Posts: 9
Joined: Tue Sep 15, 2020 8:59 am
Delivery Date: 15 Sep 2020

Re: QCs. How many are too many?

Wed Sep 23, 2020 10:37 pm

Oilpan4 wrote:
Wed Sep 23, 2020 5:25 am
Those newer 40kwh batteries like to cook when quick charged.
Really? What makes the 40 fundamentally different than the (prior) 30 or (newer) 62 versions? I guess I thought the battery container (?) was essentially the same just with more or less batteries inside. From what I’ve read, none have thermal management. Have you heard or read something different about the 40kWh?

That said, I think my Leaf had a “few too many drinks at the party” early on, so we’re going to lay low on the QCs for a while!
2018 Leaf S purchased 9/2020
SF Bay Area

Oilpan4
Posts: 1722
Joined: Wed Jan 09, 2019 10:51 pm
Delivery Date: 10 May 2018
Leaf Number: 004270

Re: QCs. How many are too many?

Wed Sep 23, 2020 10:48 pm

Cjb wrote:
Wed Sep 23, 2020 10:37 pm
Oilpan4 wrote:
Wed Sep 23, 2020 5:25 am
Those newer 40kwh batteries like to cook when quick charged.
Really? What makes the 40 fundamentally different than the (prior) 30 or (newer) 62 versions? I guess I thought the battery container (?) was essentially the same just with more or less batteries inside. From what I’ve read, none have thermal management. Have you heard or read something different about the 40kWh?

That said, I think my Leaf had a “few too many drinks at the party” early on, so we’re going to lay low on the QCs for a while!
They crammed 40kwh into a container that originally only held 24kwh.
You can quick charge just don't let it go above 7 temperature bars and don't charge to 100%.
"THE ABOVE POST CONTAINS MISLEADING AND INACCURATE INFORMATION. PLEASE CONSIDER IT OPINION, NOT FACT". -someone who I offended and is unable to produce the facts in question.

Cjb
Posts: 9
Joined: Tue Sep 15, 2020 8:59 am
Delivery Date: 15 Sep 2020

Re: QCs. How many are too many?

Wed Sep 23, 2020 10:53 pm

Oilpan4 wrote:
Wed Sep 23, 2020 10:48 pm
Cjb wrote:
Wed Sep 23, 2020 10:37 pm
Oilpan4 wrote:
Wed Sep 23, 2020 5:25 am
Those newer 40kwh batteries like to cook when quick charged.
Really? What makes the 40 fundamentally different than the (prior) 30 or (newer) 62 versions? I guess I thought the battery container (?) was essentially the same just with more or less batteries inside. From what I’ve read, none have thermal management. Have you heard or read something different about the 40kWh?

That said, I think my Leaf had a “few too many drinks at the party” early on, so we’re going to lay low on the QCs for a while!
They crammed 40kwh into a container that originally only held 24kwh.
You can quick charge just don't let it go above 7 temperature bars and don't charge to 100%.
That sounds like good advice, Thanks!
2018 Leaf S purchased 9/2020
SF Bay Area

DaveinOlyWA
Posts: 15046
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: QCs. How many are too many?

Thu Sep 24, 2020 7:02 am

Cjb wrote:
Mon Sep 21, 2020 11:44 pm
I looked at several used Leafs before purchasing this weekend. I considered:

1. 2017, 27k mi, 87 SOH
2. 2018, 7k mi, 94 SOH
3. 2018, 15k mi, 93 SOH
4. 2019, 10k mi, 94 SOH

Leafspy showed QCs in the single digits for all vehicles, except #3 showed 48 QCs!

As things unfolded, #3 had the best combo of color, features, price and was factory “certified”. I ended up purchasing it despite its many QCs because the SOH didn’t seem adversely affected at all. It was essentially the SAME SOH as the other 2nd Gens I considered.

I would imagine that Nissan has way too much invested in warranties and infrastructure to partner with EVgo (free QC charging) if QCs were horrible for your Leaf, right?

The consensus seems to be (high) temperatures, mileage and age are the biggest factors impacting battery life. Is the jury still out on quick charging?

What do you think? Is nearly 50 QCs too many? Should I avoid them like the plague now?
Raw numbers mean nothing. 480 DC sessions heating the pack to no more than 95º would likely do less damage than a half dozen done in one day baking the pack to 125º plus. Ending SOC plays a big part as well. You would need a lot more data. I would take #1 off the list simply due to insufficient range when the car was new. You "could" qualify for a warranty exchange were you to increase the degradation rate a bit but that is a dicey proposition and requires some effort on your part not to mention a woeful range for likely a year or more.

FYI; Nissan did partner with EVgo... I got at least a few thousand kwh free from them
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 13,705 mi, 93.41% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

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