Pouch Battery Cell Gas Discharge Valve for Sealed Pressure Relief

The patent applies the dynamics principle by implementing a movable member (plug) that can dynamically change the state of the flow path between open and closed positions. The plug is driven by elastic members (springs) that respond to pressure changes inside the pouch, automatically opening the flow path when gas pressure builds up and closing it when pressure normalizes. This dynamic mechanism resolves the contradiction by allowing the system to maintain a closed state for longevity while automatically opening to discharge gas when necessary, preventing gas accumulation without compromising long-term lifespan.

The patent applies the self-service principle by designing a gas discharge mechanism that operates autonomously without external control. The movable plug is actuated automatically by internal gas pressure working against elastic members (springs). When gas pressure exceeds the elastic force, the plug is pushed open to discharge gas; when pressure equalizes, the springs return the plug to the closed position. This self-regulating mechanism provides effective gas discharge capability while maintaining relatively simple structure, as the system uses the existing pressure differential to drive its own operation without requiring complex control systems or additional power sources.