Secondary Battery Electrode Tabs With Layered Multi-Tab Winding

The electrode tab is segmented into multiple tabs (first tab and second tab) that are separated by a slit extending from the end of the electrode. This segmentation allows multiple electrical connection points without requiring large non-coating portions, as each tab can be independently connected to the current collector while maintaining active material coverage on the remaining electrode surface.

The tabs are arranged in different spatial dimensions and orientations on the electrode surface. The first tab extends in a first direction while the second tab extends in a second direction different from the first direction, allowing efficient use of the electrode width and length to accommodate multiple tabs without significantly increasing the total non-coating area.

The electrode is divided into multiple tabs through slits that extend from the electrode end, creating separate tab regions. Each tab maintains sufficient width and structural integrity while providing multiple connection points. The segmentation is achieved by controlled cutting that preserves the mechanical strength of each individual tab while distributing the electrical connection load across multiple tabs.

The electrode structure has different local properties: the tab regions are designed with specific dimensions and orientations to optimize both mechanical strength and electrical connection, while the active material regions maintain high coating density for capacity. The slit positions and tab dimensions are locally optimized to balance mechanical and electrical requirements.