The inner structure of the battery that contains the modules, the frame surrounding it, and the cover plates are made of lightweight aluminum. The battery system contributes significantly to the rigidity and crash safety of the body to which it is attached via 28 screws. Beneath its cell space there is a compound structure of flat extruded sections through which coolant flows that circulates in its own low-temperature circuit. The battery’s feel-good temperature is between 30 and 35 degrees Celsius.