Pouch Battery Sealing Body With Phase-Change Temperature Hold

The patent utilizes the phase transition (evaporation) of a solvent as the heat transfer medium. When the solvent evaporates, it absorbs latent heat from the heat source, maintaining a constant temperature during the phase change process. This resolves the temperature fluctuation issue by replacing direct heat source contact with phase-change-mediated heat transfer, where the solvent's boiling point acts as a natural temperature regulator.

The patent introduces a solvent as an intermediary substance between the heat source and the sealing surface. The solvent absorbs heat from the heat source and transfers it to the sealing surface through controlled evaporation, acting as a thermal buffer that smooths out temperature fluctuations. This intermediary approach decouples the direct thermal connection, preventing temperature waves while maintaining effective heating.

The solvent's phase transition from liquid to gas provides a natural temperature clamp at the boiling point. This ensures the sealing surface receives consistent thermal energy without exceeding the solvent's boiling temperature, preventing thermal runaway and associated defects. The phase change mechanism inherently limits maximum temperature while ensuring sufficient heat for proper sealing.

The system maintains continuous evaporation of the solvent, ensuring uninterrupted heat transfer to the sealing surface. This continuous phase change process provides steady, uniform heating without the on/off cycling that causes temperature waves, thereby improving both sealing quality and reliability by eliminating thermal shock and uneven heating patterns.

The solvent's evaporation process provides an automatic temperature regulation mechanism. As long as the solvent is supplied continuously, the temperature remains pinned at the boiling point during phase change, eliminating the need for complex control systems. This phase-change-based approach maintains high heating efficiency while dramatically simplifying temperature control.

The solvent system is self-regulating through its phase change properties. The evaporation rate naturally adjusts to maintain thermal equilibrium, and the latent heat absorption during phase change automatically buffers temperature spikes. This self-service mechanism eliminates the need for active temperature control systems, improving ease of operation while maintaining efficient heating.