Battery Module Cell Barriers for Thermal Runaway Containment

The patent divides the battery module into isolated compartments by inserting flame-retardant sheets and heat-absorbing members between adjacent battery cells. This segmentation prevents heat and flame from spreading across the entire module, addressing the safety issue while maintaining compact arrangement.

The patent introduces flame-retardant sheets and heat-absorbing members as intermediary components between battery cells. These intermediaries act as barriers that block heat transfer and flame propagation, resolving the contradiction between close cell arrangement and heat isolation.

The patent employs foam-based heat-absorbing members with porous structures that efficiently absorb heat through their high surface area to volume ratio. These porous materials provide effective thermal protection while maintaining relatively simple geometric forms that are easier to manufacture and install.

The patent uses composite structures combining flame-retardant sheets with heat-absorbing foam materials. This composite approach achieves superior fire safety performance by leveraging the complementary properties of different materials, while the standardized composite design simplifies the overall manufacturing process compared to complex multi-component assemblies.

The patent utilizes the phase transition property of the foam material, which expands when exposed to heat. This phase transition allows the heat-absorbing members to increase in volume only when needed for flame containment, providing effective protection without requiring permanently large volumes that would reduce battery module density.

The heat-absorbing members are designed to thermally expand when exposed to fire conditions, increasing their volume to effectively block flame propagation. This thermal expansion mechanism allows compact storage during normal operation while providing substantial protective volume when heat containment is required.