Electrode Assembly Separator Structure for Tab Short-Circuit Prevention

The separator with bent and extension portions acts as an intermediary component between the electrode sheets and tabs. It physically blocks the tabs from penetrating between electrode sheets while maintaining the assembly's manufacturability through a straightforward stacking process.

The separator is pre-formed with bent and extension portions before assembly. This preliminary shaping creates a protective structure that proactively prevents tab penetration, eliminating the need for post-assembly adjustments or complex manufacturing steps.

The separator is divided into functional segments: separation portions for basic isolation, bent portions for mechanical protection, and extension portions for tab blocking. This segmentation allows each part to perform its specific function efficiently while maintaining overall manufacturability through a single integrated component.

Different regions of the separator have different structural characteristics optimized for their specific functions. The bent portions provide mechanical strength where tabs apply force, while extension portions provide coverage in tab-prone areas, and simple separation portions maintain basic isolation elsewhere. This localized optimization enhances safety without requiring complex structures throughout.