[Nebster]

Here are all six strings, fully wired up.  Each string goes through a dedicated contactor that can isolate the string, either automatically if there is a fault detected on the string itself, or manually if I need to take one string out for maintenance.



Each "cube" of 16 cells is sitting on a neoprene vibration isolation pad and is strapped together at the top with solid bus bars.  You can see gaps between the cells -- this is a newer style of cell made with aluminum casings, and those casings are designed to be electrically isolated via the light blue spacers at the top and bottom.  The gaps also allow air to circulate, which helps to keep the total pack temperature more even.

It remains to be seen whether this mounting approach will be sufficient mechanically.  It is one of my least favorite parts of the design, and I do have the option to remove the Newell trays entirely and place all 96 cells on the floor of the bay directly.  If I find that there is any shifting going on, I may have to switch designs down the road.  Stay tuned on that!

Each string is bussed up to bars on the top there, and then those bars send ~52VDC nominal over to the inverter bay re-using the old, dual 4/0 cables that were already in place on our Newell.

There is a monster contactor between the busbar and the inverter bay that can interrupt the entire pack in the event of a thermal or electrical fault detected in the battery. Just like the string-level contactors, I can also manually disconnect the pack for maintenance.