Battery Case Energy Absorber for Lightweight Impact Protection

The patent applies beforehand cushioning by pre-installing a protection plate and energy absorber between the bottom plate and battery module. The protection plate is positioned in advance to prevent direct impact on the battery module, while the energy absorber is pre-arranged to dissipate impact energy before it reaches the battery, thereby providing proactive protection without requiring heavy reinforcement structures.

The patent utilizes porous materials by employing a foam energy absorber with controlled porosity. The porous structure of the foam allows it to compress and expand during impact, effectively absorbing energy through cell collapse and rebound mechanisms. This porous material provides superior energy absorption per unit weight compared to solid materials, resolving the contradiction between protection capability and weight.

The patent converts harm into benefit by transforming impact energy into useful work through the energy absorber. During collision, the kinetic energy that would otherwise damage the battery module is converted into deformation energy of the foam material and dissipated as heat through internal friction. This converts the harmful impact force into a beneficial energy dissipation process, providing high impact resistance without requiring heavy protective structures.

The patent employs composite materials by combining the protection plate (likely metal or composite) with the foam energy absorber material. This composite structure leverages the high strength and stiffness of the protection plate to distribute impact forces, while the foam material provides lightweight energy absorption. The synergistic combination achieves superior impact resistance at reduced weight compared to using either material alone.