Electrode Member Thickness Gradient for Battery Rolling Deformation

The patent applies local quality by creating a thickness gradient in the active material layer, where the thickness varies from the first region (thicker) to the second region (thinner). This non-uniform thickness distribution compensates for the differential extension of the insulating substrate during rolling, allowing the layer to be rolled thinly for high energy density while preventing bending deformation through the strategically designed thickness variation

The patent uses local quality by designing different thickness regions in the active material layer. The first region with greater thickness and the second region with smaller thickness are strategically positioned to compensate for the differential extension of the insulating substrate. This allows the substrate to extend freely during rolling while the thickness gradient maintains the alignment precision of the active material layers

The patent applies parameter changes by transitioning from a uniform thickness parameter to a gradient thickness parameter in the active material layer. By changing the thickness parameter from constant to variable (thicker in first region, thinner in second region), the patent resolves the contradiction between manufacturing simplicity and preventing bending, as the gradient structure inherently compensates for differential extension while remaining manufacturable