ReisheJ said:
Thanks everyone for your input.
I spoke to the service mgr. this morning. He reports that one of the four battery packs that make up the main battery is leaking, and he says he ordered a replacement today, as well as putting in a formal request to extend the rental I have currently (which would otherwise expire Monday morning). The two techs who have been working on it are both Leaf-certified, and the regional Leaf tech advisor was in to take a look at it today.
Now I'm just here with my fingers and toes crossed that Nissan has a battery pack in stock somewhere in my part of the country and that they see fit to ship it ASAP.
Did he mean twenty four or forty-eight battery packs, not four? It's also possible that as the service mgr, he was just repeating what the tech said. If the tech truly thought there were four packs in the battery, I would definitely be thinking about taking the car somewhere else or alternative options.
For your knowledge, this is the inside of a 24kWh Leaf battery (48 battery modules):
https://acarisnotarefrigerator.files.wordpress.com/2010/11/nissan_leaf_battery_pack.jpg
And this is a 30kWh battery (24 battery modules):
http://evsenhanced.com/services/30kwh-leaf-cell-imbalance-and-complete-cell-failure/
You can see clearly the metal battery modules, and there are way more than four.
By the way, the second article I linked talked specifically about cell failures, why they happen, and how you solve them.
Hopefully this knowledge can let you have a constructive discussion with them if you continue to see a lack of progress. There are also videos on Youtube of people disassembling Leaf battery packs, which can give you a general idea of the work they need to do, if this is in fact the problem.