Now I watched, and as expected, Ultium is nothing, actually it's worse than nothing
This is one of the worst battery pack designs I've seen so far, and they are putting similar ones on every new product, there is no way in hell they can scale production with those designs, much less making a profit
It's to the point that the only explanation is that they took their best engineers, and told them to put their abilities and uttermost care to make the worst design possible as a way to hamper production and continue building ICE, because it's too many bad decisions at the same product to be made by incompetence alone
What boils my blood is the thermal design (pun intended), a engineer has to be pretty stupid to use the smallest contact area possible between a cell and a cooling plate
Now, Ford did exactly that on the Lightning pack, but GM managed to one up them, and took the cooling plate which the cell make contact and oriented such as the bumpy side that are the fluid channels face the cells, so instead of having a thin layer of thermal adhesive, you have a thick bead that insulates the cells from your cooling
The cells basically have no heating or cooling at any meaningful rate, sure it works, but your 10-80% charging session takes 60 minutes, also there will be an enormous temperature delta between coldest and hottest spot on the pack, meaning uneven aging inside the pack which will show up after a few years on the road
But wait, they managed to make it even worse, the thermistors (temperature sensors) are placed on each module in a place where you don't get a good estimation of the hottest temperature or the coldest, and also in a way that it doesn't have proper contact with the hottest or coldest cell
This circle us back to the traction control subject, if you have good engineering and can be on the edge, you can extract the maximum of your product, else you have to be conservative
Let's hope GM is being quite conservative and that the cells aren't cooking themselves and we will have another Bolt incident with the Hummer
But from what we've seen so far with the water intrusion recall, it wouldn't surprise me. Would you guys believe that a battery enclosure made of more than a hundred stamped and welded steel pieces that need to be properly sealed between each would have had problems with being water tight? Shocking