If you try to store an enourmous amount of energy, this has always been a safety issue (for example: Rocket science). And although I am always among those first blaming management if something goes wrong
engineering is relevant as well. So we need safe battery design
and safe battery management. As in real life, larger units are harder to manage. And it always helps if management is well informed about what is going on... Having 8 huge cells (of 3 hidden units each) with only 8 voltage sensing and only 2 temperature sensing devices might not help management to do a propper job... So first we need to make sure that management understands what it manages, has all informations how the units perform
and has to be smart to make them produce optimum performance with a perfect safety record. This might be rocket science, but it has been done before. And if something is "too big to manage", split it into smaller units until you can manage them well and accept a few underperformers in your team...