Battery Pack Heat Path Structure for Cell Group Cooling

The invention introduces a new spatial dimension for heat dissipation by extending the heat dissipation fin from the top surface of the battery pack along the side surface to the bottom surface. This vertical extension creates additional heat dissipation area in the third dimension, allowing heat to be dissipated not only from the top but also from the side and bottom surfaces, thereby compensating for the cooling performance degradation caused by gaps in the cell group layout.

The invention merges the cooling plate function with the case structure by integrating the heat dissipation fin directly into the case. The heat dissipation fin extends from the top surface along the side surface to the bottom surface, creating a continuous heat dissipation path that connects the internal cooling plates to the external environment. This integration ensures that heat generated within the cell group can be efficiently transferred to the case and dissipated to the outside, solving the insufficient heat dissipation path problem.

The invention makes the case serve multiple functions: it provides structural support, electrical isolation, and heat dissipation. The heat dissipation fin integrated into the case transforms the case from a simple protective shell into an active heat dissipation component. This multi-functionality allows the case to simultaneously maintain structural integrity and provide efficient heat dissipation to the outside environment without requiring separate complex cooling structures.