Battery Cell Recess Structure for Compact High-Density Assembly

The patent applies nesting by incorporating recesses into the battery cell wall structure that accommodate internal components such as tabs and connecting members. The recesses are formed directly in the wall, allowing components to be nested within the wall thickness rather than occupying separate external space, thereby improving space utilization while maintaining relatively simple structural implementation.

The patent utilizes the wall thickness dimension by creating recesses that extend into the wall from its outer surface. This dimensional approach allows components to be positioned within the wall's third dimension rather than requiring additional external space, effectively improving space utilization without significantly increasing overall structural complexity.

The recesses are pre-formed as integral features of the battery cell wall structure during wall manufacturing. This preliminary action ensures that components such as tabs and connecting members have predetermined accommodation spaces ready before final assembly, simplifying the assembly process while requiring precise manufacturing of the recess features themselves.

The patent applies local quality by creating specifically shaped recesses in the wall at precise locations to accommodate specific components. The recesses have tailored geometries (depth, width, shape) that match the components they receive, requiring localized manufacturing precision only where needed rather than throughout the entire structure, thus balancing precision requirements with assembly simplicity.

When recesses extend through the wall, they create interconnected accommodation spaces that allow components to be nested across multiple cell boundaries. This nesting approach improves space utilization by eliminating redundant wall structures between adjacent cells while the continuous wall material maintains structural integrity and distributes stress.

The patent incorporates chamfers at the corners and transitions of recesses, creating curved or angled transitions rather than sharp 90-degree corners. This curvature principle reduces stress concentration at recess boundaries by distributing mechanical stresses more evenly across the wall structure, particularly important when recesses extend through the cell to form interconnected spaces.