Secondary Battery Drying with Central Pressure Restraint

The patent applies different drying conditions to different regions of the electrode body. Specifically, the central region (within distance d/2 from the center line) receives different treatment compared to the end regions. This is achieved by positioning the electrode body such that the central region is closer to the drying heat source or has different air flow characteristics, creating locally optimized drying conditions that prevent moisture accumulation in the central area while maintaining overall process simplicity.

The patent employs preliminary positioning of the electrode body in the drying furnace before the drying process begins. The electrode body is positioned at a specific orientation and location within the drying chamber, with the central region strategically placed to optimize moisture removal. This preliminary arrangement ensures that during the drying process, the central region experiences optimal heat and mass transfer conditions, enhancing moisture removal effectiveness without requiring complex real-time adjustment mechanisms.

The patent segments the electrode body into different regions (central region and end regions) and applies different restraining pressures to each segment. The gripping mechanism is designed with multiple contact points or adjustable gripping elements that can independently apply force to different sections of the electrode body. This segmentation allows the central region to receive larger restraining pressure for enhanced moisture removal, while the end regions experience appropriate pressure, all through a single integrated gripping operation that maintains operational simplicity.