Jelly-Roll Electrode Assembly Layout for N/P Ratio Balance

The patent applies local quality by creating a loading reduction portion at the boundary region of the cathode active material. This means that instead of uniform loading across the entire cathode, the loading amount is locally reduced at specific boundary regions where the anode active material loading is also reduced. This localized adjustment prevents metallic lithium precipitation at these critical boundary regions while maintaining high loading amounts in the central regions to maximize energy density.

The patent implements partial action by selectively reducing the cathode active material loading only at the boundary regions rather than across the entire cathode surface. The loading reduction portion is positioned to correspond with the anode loading reduction portion, creating a matched pair of reduced-loading regions. This partial adjustment is sufficient to prevent lithium precipitation without unnecessarily reducing the overall energy density of the battery.

The patent implements preliminary action by pre-positioning the loading reduction portions at the boundary regions of both the anode and cathode before assembly. This anticipatory design ensures that when the battery is assembled and charged, the boundary regions are already configured to prevent lithium precipitation. The loading reduction portions are positioned in advance to correspond with each other, creating a preventive structure against the harmful effect of metallic lithium precipitation.

The patent applies local quality by creating specific loading reduction portions at the boundary regions of both anode and cathode. These localized modifications are positioned to correspond with each other, creating matched pairs of reduced-loading regions. This localized approach prevents metallic lithium precipitation at the critical boundary portions while maintaining high capacity in the central regions where full loading is preserved.