For those with a need to know, here's a whole video series devoted to dissecting a Nissan LEAF battery.
YouTuber jwsolarusa has uploaded a number of videos about various processes of lithium-ion battery pack disassembly. If you're into this sort of thing, these videos are great because none of them are obsessively long, however, the information is in-depth enough to keep you moving in the right direction. It also provides valuable insight into troubleshooting issues that may occur throughout the process. The particular battery in question is a 24-kWh pack from a 2011 Nissan LEAF.