Shifted Collector Lamination Layout for High-Capacity Batteries

The electrode body is divided into a plurality of groups along the stacking direction, with each group having its own collector tab that is joined to the electrode collector terminal in the thickness direction. This segmentation allows each group to be independently connected without requiring twisting of a single long collector tab, thereby maintaining space efficiency while reducing breakage risk.

The connection direction is changed from oblique (in the plane of the electrode body) to vertical (in the thickness direction). By joining the collector tab to the electrode collector terminal in the thickness direction rather than in an oblique direction within the electrode plane, the design achieves space efficiency without requiring twisting of the collector tab.

The electrode body with high number of stacked layers is divided into multiple groups, each with its own collector tab. This segmentation simplifies the collector structure by creating multiple independent connection points rather than requiring a single complex collector tab structure to handle all layers, thereby reducing overall structural complexity while maintaining high capacity.

Instead of having a single collector tab extend through all stacked layers, the design uses multiple collector tabs that each serve a portion of the stacked layers. This partial action approach reduces the complexity of each individual collector tab while collectively handling the high number of stacked layers.