Foldable Pouch Battery Case for Internal Pressure Safety

The battery case is pre-formed with a foldable structure that is ready to activate automatically when abnormal pressure occurs. The folded state is prepared in advance so that upon gas generation, the structure can quickly unfold to separate electrode tabs from leads, cutting off current before explosion occurs.

The harmful high-pressure gas that could cause explosion is converted into a beneficial force that triggers the safety mechanism. The gas pressure itself unfolds the foldable structure, using the harmful pressure to activate the current-cutting function that prevents explosion.

The battery case is segmented into multiple parts connected by foldable structures, allowing different sections to move relative to each other. This segmentation enables the case to deform in a controlled manner to separate electrode tabs from leads while maintaining overall structural integrity through the sealed configuration.

The battery case transitions from a static rigid structure to a dynamic structure with foldable sections that can change configuration. The foldable structures allow the case to adapt its shape in response to internal pressure, enabling the safety function of separating electrical contacts while maintaining structural coherence.

The safety function is merged into the battery case structure itself rather than being a separate device. The foldable structures are integrated into the case walls, combining the protective casing function with the active safety mechanism, thereby avoiding additional weight from separate safety devices.

The battery case performs its own safety function without requiring external safety devices. The foldable structures are self-activating, using the internal gas pressure to automatically unfold and separate electrical contacts, eliminating the need for additional powered safety systems that would increase weight.

The foldable structures are pre-formed during the battery case manufacturing process, so the safety mechanism is already in place before battery assembly. This preliminary formation eliminates the need for additional complex assembly steps, maintaining manufacturing simplicity while providing advanced safety functionality.

The battery case uses flexible portions with foldable structures that can be formed using standard forming processes. These flexible sections are integrated into the overall case structure, allowing the safety mechanism to be manufactured using conventional battery case fabrication methods without requiring complex additional processes.