Pouch Cell Cover Structure for Thermal Runaway Venting

The patent applies beforehand cushioning by providing a cell cover that surrounds each pouch-type battery cell before thermal events or external shocks occur. The cell cover includes a particle pocket positioned to receive and contain particles ejected during thermal events, and a gas discharge hole for controlled gas release. This protective structure is pre-installed on each cell, cushioning against potential damage from external shocks and thermal runaway events before they happen.

The patent applies segmentation by dividing the battery pack into individual cell units, each surrounded by its own cell cover. Instead of assembling large modular blocks, each pouch-type battery cell is independently covered with a cell cover that includes partition walls, particle pockets, and gas discharge holes. This segmented approach simplifies assembly by allowing individual cell installation and provides better control over each cell's protective features.

The patent applies the nested doll principle by placing the cell cover structure directly around each individual battery cell, which then contains the electrode assembly and electrolyte. The cell cover with its particle pockets and partition walls is nested around each cell, creating a compact configuration that eliminates the need for larger modular housings. This nested structure reduces dead space and improves energy density while maintaining ease of assembly through standardized cell-level components.

The patent applies segmentation by providing individual cell covers for each battery cell, with each cover including gas discharge holes and particle pockets. This cell-level segmentation allows for more effective heat management compared to large modular units, as each cell can be independently monitored and protected. The gas discharge holes provide controlled venting pathways, and the compact cell cover structure improves thermal management efficiency while maintaining assembly ease through standardized components.

The patent applies beforehand cushioning by pre-installing cell covers with gas discharge holes and particle pockets on each pouch-type battery cell before swelling or thermal events occur. The gas discharge holes provide predetermined pathways for gas release during swelling events, and the particle pockets are positioned to contain ejected particles. This pre-configured protective structure enables proper response to swelling without requiring complex external intervention.