Normal Temperature Bars

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stevek

Member
Joined
May 30, 2017
Messages
8
I read a lot about keeping battery temps " normal". However that must vary region to region, based on ambient temps. I live in South Florida and always have six(6) bars, which is normal for me. However, I don't know if that is normal for best battery life. (Not that I can do anything about it). What is considered a good operating temperature in bars?. Thanks for your insights!
 
Lithium_Manganese_Battery_Calendar_Life.jpg


http://www.electricvehiclewiki.com/Battery_Capacity_Loss

The colder the better. A Nissan Leaf battery will last over 11 years in Alaska but may last less than 4 years in Florida.
 
My '13 SL is at 6 bars most of the time. I've been seeing a bit of 7 lately with the 100deg temps, but 6 has been the norm for me, even in 70-80deg temps.
 
Thanks for the responses. While the graph is a bit scary for Florida, the consensus of 6 bar norm means my ambient temp is not causing higher than normal operating temps.

Steve
 
stevek said:
Thanks for the responses. While the graph is a bit scary for Florida, the consensus of 6 bar norm means my ambient temp is not causing higher than normal operating temps.

Steve

Not higher than normal, but you will likely still see more degradation than those whose normal reading is 5 bars or less.
 
Keep in mind the battery temp gauge has huge overlapping ranges: http://www.electricvehiclewiki.com/Battery#Battery_Temperature_Gauge.

I'm not sure how useful the graph Isaac cited it as it this point. I believe it was created during the crap '11 and '12 batteries (during the Phoenix capacity loss fiasco) and doesn't reflect the 4/2013+ '13 and '14 Leaf batteries, the "lizard" batteries on the '15 nor the '16 and '17 30 kWh batteries, to name a few.

It seems the 4/2013+ batteries hold up better. The lizard batteries are even better while the signs for the 30 kWh batteries have been surprisingly bad. Not clear if the alarming 30 kWh capacity bar losses are due to some folks having defective packs or cells or some characteristic of a (production) run between a certain time span or a.... quirk those packs, in general.

Nissan has never been forthcoming w/publicly releasing any sort of data on degradation (e.g. time vs. temperature for a given chemistry) for any of its batteries and when there have been tweaks to the chemistry. Best we got were references to a "hot" battery that was in testing aka "lizard" battery. Only notification we got about its release was http://www.mynissanleaf.com/viewtopic.php?f=4&t=17168. Notice the lack of details?

BTW, https://www.youtube.com/watch?v=Vz2WzLQ2tqg (from a MNLer) shows 0 temp bars. I wish I could chill my batteries down to that low. I think my pack would last pretty long if I could do that each night.
 
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