I've now seen several Leaf owners reporting in forums that their batteries are getting really hot after long drives and several fast charges. I realise the weather is unusually hot at the moment, but I wonder whether Leaf owners should even be attempting long drives on hot days, such as Auckland to Wellington, in 1 day?
And what happens to your Leaf if you keep driving once the battery gets into the red? Does it automatically slow down or even shut down completely?
Also, does the use of air conditioning have much effect on the temperature of the Leaf's battery?
Would the BMW i3, which has a battery cooling system, be able to handle long distances and several fast charges much better than the Leaf? In other words, is the i3's cooling system really effective on 30-degree days?
I have seen my LEAF simply stop charging once....when my daughter and I drove from Auckland to Opotiki and back on the same day....over 700km.
At the last charging stop in Thames the battery got to 55.5C (one red bar).....and just stopped charging at 75%. After that just refused to charge.
It was about 10C that night, so we went for a walk around the block for 20-30 minutes.....and when we came back we were easily able to add 15% more and go home. It had cooled off nearly 5C whiole we were walking. The top end tends to cool down quickly if it's cool outside.
I've only been over 50C a handful of times. The car simply won't let you get near 60C.......theoretically when the battery may be damaged. But anecdotal evidence suggests that when fast charging an already pretty hot battery (over 50C) you're risking degradation.
I'm 53,000+ km and still 92% SoH and the car is 2 years old. I'm within the bounds of what I consider acceptable.
An i3 would definitely be better. It has more range and the battery is cooled.