Meaning
Structural battery assemblies group individual rectangular cells into a unified package that provides mechanical support and electrical connectivity within a vehicle or grid storage system. Using prismatic battery modules allows for high packing density because the flat surfaces of the cells fit tightly together. The assembly stops at the high voltage connectors and the cooling interface plate.
Space Efficiency
Rectangular shapes eliminate the dead space found between cylindrical cells. Inside prismatic battery modules, the cells are often stacked horizontally or vertically to fill the available volume of the pack.
Thermal Control
Large surface areas permit efficient heat transfer to the surrounding cooling system. Cooling prismatic battery modules involves the use of liquid cold plates or forced air across the aluminum casings. Temperature sensors within the module monitor the health of individual cells to prevent localized overheating.
Structural Integrity
Metal frames and end plates protect the internal components from external impacts and vibrations. Designing prismatic battery modules requires a balance between adding protective mass and maintaining a high energy density. Compression pads between cells absorb expansion forces to prevent the housing from warping over time.
Reliable busbar connections ensure that electricity flows with minimal resistance across the entire string of cells.
