Wound Electrode Assembly Conductive Layer for Rapid-Charge Cooling

The patent applies the principle of converting harm into benefit by utilizing the heat-generating property of conductive materials to solve the heat dissipation problem. Specifically, a conductive layer containing conductive materials (such as carbon black, graphite, or metal particles) is formed on the electrode uncoated portions and outer surface of the battery. This conductive layer creates additional heat dissipation pathways through electrical conduction, effectively converting the previously harmful heat accumulation into a beneficial heat dissipation mechanism. The conductive materials provide alternative routes for heat transfer, allowing the battery to maintain lower temperatures during rapid charging while preserving high charging speeds.

The conductive layer serves multiple functions simultaneously, embodying the principle of multi-functionality. It acts as both a heat dissipation pathway and an electrical conductivity enhancement layer. The same conductive materials that facilitate heat transfer also improve electrical conductivity at the electrode edges and outer surfaces. This multi-functional design eliminates the need for separate heat dissipation structures, thereby reducing overall device complexity while achieving effective temperature control during rapid charging operations.