How do you integrate the battery pack as a structural element of the vehicle?

Structural battery integration (cell-to-body, cell-to-chassis) uses the pack as a load-bearing member: The pack floor becomes the vehicle floor, pack side rails replace rocker reinforcements, and pack contributes to torsional stiffness. Design requires: Battery design for structural loads (crash, fatigue, NVH), matching CTE between battery and body materials, load path continuity through mounting points, servicability considerations, and crash energy management without cell damage. Benefits include weight reduction (eliminating redundant structure) and improved stiffness. Tesla Model Y and BYD Blade demonstrate production implementations. Challenges include repair complexity and battery replaceability.