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Rapidgate on the 62 kWh Leaf Plus?

Posted: Tue Mar 19, 2019 8:47 am
by TexasLeaf
The Leaf Plus has been out a couple of months now and Autotrader actually has listings for about 50 new Leaf Plus models but I have not yet read any articles/reports on long distance trips in the Leaf Plus with multiple fast charges. I know Nissan has been saying that the Leaf Plus is not prone to battery overheating and slow charging with multiple fast charges like the 40 kWh Leaf is but I would really like to see some real world tests before I buy in to what Nissan is saying. Has anybody seen any long distance articles/reports on the Leaf Plus that tested multiple fast charges?

Re: Rapidgate on the 62 kWh Leaf Plus?

Posted: Mon May 06, 2019 8:18 am
by retrodog
This might be one of those things that we will just have to wait for. Nissan obviously isn't going to offer up anything, not with all the competition out there and their last minute decision to drop active cooling.

:|

Re: Rapidgate on the 62 kWh Leaf Plus?

Posted: Mon May 06, 2019 1:54 pm
by DanCar
Do we know how much battery reserve there is? It was my impression that Nissan was battling the degrade issue with a large reserve, perhaps not much different that 40kWh Leaf strategy.

Re: Rapidgate on the 62 kWh Leaf Plus?

Posted: Mon May 06, 2019 2:36 pm
by umdkevin
I use EVgo under Nissan's free No Charge to Charge program and offer you this data point.

As you may know, the program limits rapid charging session to 30 minutes, so no problem I just use the app to start a new session immediately after the first one stops (meantime, I'm grabbing lunch or something). I did this many times with my 2018, 40 kWh LEAF and the second session significantly dropped charging levels. I'm sure some of this was from the battery limiting due to the SOC getting high around the same time and some from Rapidgate, hard to differentiate.

I've only done the 2 session charge on my 2019 Plus twice but the results are promising. So far, I am only seeing about 25% drop vs nearly 50% experienced with last years model. Here's the highlight:

*62kWh - Avg kWh
1st Session - 44.2
2nd Session - 32.5

40kWh - Avg kWh
1st Session - 31.8
2nd Session - 17.3


* Limited data set, only 2 quick charges

Re: Rapidgate on the 62 kWh Leaf Plus?

Posted: Mon May 06, 2019 6:01 pm
by SageBrush
umdkevin wrote: *62kWh - Avg kWh
1st Session - 44.2
2nd Session - 32.5

40kWh - Avg kWh
1st Session - 31.8
2nd Session - 17.3
Is that supposed to be average kW ? If so what calculation was performed ?

Re: Rapidgate on the 62 kWh Leaf Plus?

Posted: Mon May 06, 2019 8:48 pm
by stutech
retrodog wrote:This might be one of those things that we will just have to wait for. Nissan obviously isn't going to offer up anything, not with all the competition out there and their last minute decision to drop active cooling.

:|
On my 2019 sl plus I don't seem to have rapidgate anymore, I traded in a 2018 sv that was an early model and definitely had rapid gate. The battery obviously heats up from charging, but I haven't seen it go much past the center yet on the several 300+ mile trips i've taken. I was using electrify America chargers and couldn't get more than 50kw of charging at any of them though. My average rate was about 48kw and didn't really drop until over 85% most the time. On evgo I get terrible rates, mainly because the charger itself seems old and like it can barely keep 50kw. I've also used chargepoint ones, and they seem to give a nice constant 50kw. From what I can tell though my battery cools back down before I get to the next charger on the plus model with 50kw charging. My average speeds have been 65-70mph and the ambient temp was 60-80F. I would love to see how it does at 100kw charging with even warmer temps to get a true assessment.

Re: Rapidgate on the 62 kWh Leaf Plus?

Posted: Tue May 07, 2019 5:39 am
by SageBrush
stutech wrote:I would love to see how it does at 100kw charging with even warmer temps to get a true assessment.
4x the heat generation.

In a LEAF with a fan blowing over the case for heat dissipation ? That sounds like a recipe for a fire.

Re: Rapidgate on the 62 kWh Leaf Plus?

Posted: Tue May 07, 2019 6:02 am
by WetEV
SageBrush wrote:
stutech wrote:I would love to see how it does at 100kw charging with even warmer temps to get a true assessment.
4x the heat generation.

In a LEAF with a fan blowing over the case for heat dissipation ? That sounds like a recipe for a fire.
I'd bet more Tesla's torch. The difference is that Tesla has water in the battery pack. Water and Lithium don't mix well. Get a leak, and something like this happens:

Image

Re: Rapidgate on the 62 kWh Leaf Plus?

Posted: Tue May 07, 2019 6:13 am
by SageBrush
WetEV wrote:
SageBrush wrote:
stutech wrote:I would love to see how it does at 100kw charging with even warmer temps to get a true assessment.
4x the heat generation.

In a LEAF with a fan blowing over the case for heat dissipation ? That sounds like a recipe for a fire.
I'd bet
Don't worry, the LEAF will just reach the rapid-gate threshold in 1/4 the time :lol:

The Tesla has its own version of rapid gate. Although charging can reach 250 kW using V3 superchargers, it quickly starts to taper. I will only average ~ 175 kW charging up the first half of the battery.

Re: Rapidgate on the 62 kWh Leaf Plus?

Posted: Tue May 07, 2019 6:43 am
by WetEV
SageBrush wrote:
WetEV wrote:
SageBrush wrote: 4x the heat generation.

In a LEAF with a fan blowing over the case for heat dissipation ? That sounds like a recipe for a fire.
I'd bet
Don't worry, the LEAF will just reach the rapid-gate threshold in 1/4 the time
Except it doesn't.