[Tanoc]

The Ford Mach-E does the same thing. There's thin box frame rails as part of the traditional ladder frame, and the battery pack actually forms the floorpan and stressed crossmembers. Without the battery pack the frame will deform because there's no lateral reinforcement, making it this weird hybrid of a ladder frame and unibody that it shares with the Model X and Ioniq 5. Most EVs like the Bolt and the Ioniq 6 are unibodies however since they're just designed like regular cars with battery packs shoved where the fuel tank would normally go under the rear seat or rear hatch floor, and the battery pack simply reinforces the floor.

[panick21_]

Its not actually the same. People constantly mix things up because the words people use are so wrong.

Structural packs are nothing new, lots of EV always had structural packs.

What Tesla is doing in the newer Model Y (called 'Structural Pack') is actually structural cells. That's the innovation. Where the cells themselves are glued together and sandwiched in a pack. So the cells themselves act as vertical enforcers. The whole back is basically filled with structural foam.

The only other company that is doing something like that is BYD but that is quite different as those are really big Prismatic cells stacked up.