Astros wrote: ↑
Tue Sep 10, 2019 12:56 pm
DaveinOlyWA wrote: ↑
Tue Sep 10, 2019 6:37 am
A bombshell comment made by a VERY reputable person from Nissan stating 62 kwh packs now have circulation fan. Still waiting on more details on that.
I saw that post, but I don't really believe it. It is true that I see my Plus battery pack heat up much less than my 30 or 40kWh packs did, even with multiple long fast charging sessions, but I have mostly attributed that to the lower C rate. On my last long trip, our second charge lasted 55 minutes and we gained over 40kWh to a 94% SoC, which suggests that we were getting close to the full 44kW rate of the charger up to ~90% SoC. Even then, we only had 8 temperature bars. I'm afraid I neglected to get a LeafSpy reading at that point. Still, I didn't hear any sort of fan noise coming from the car, so if there is a fan, I can't imagine it's doing much.
I only consider it newsworthy because of the source who I trust A LOT. Remember he just returned from the Corporate awards ceremony where exposure to the upper echelons of LEAF design is not only possible but expected so the timing of his reveal is not a surprise.
As far as testing heat dissipation; charging to high SOC is not the way to do it. The ramp down is designed to mitigate the heat issues. If you want to do a real test; Only charge to the knee where the current starts to drop. Do that repeatedly and you should gain much more heat over the same distance traveled (and spend a lot less time charging)
FYI; the full rate on "most" chargers around here at 90% SOC would be higher than 44 KW. That is only 366 volts. Do you have a charge curve you can post?
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; 16,686 mi, 91.51% SOH
My Blog; http://daveinolywa.blogspot.com
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