Battery Module Interface Structure for Blocking Inter-Module Heat Diffusion

The thermal insulation structure is divided into multiple segments: thermal insulation pads are placed at both ends of the heat spreader sheet, creating a segmented insulation approach. This allows effective heat diffusion prevention through multiple localized insulation points rather than requiring a single wide insulation pad, thereby maintaining energy density while achieving reliability.

The heat spreader sheet acts as an intermediary component between adjacent battery modules. It conducts heat away from the interface between modules, working in conjunction with thermal insulation pads to prevent heat diffusion. This intermediary structure enables effective thermal management without requiring large-width insulation pads that would reduce energy density.

Thermal insulation properties are applied locally at critical heat transfer paths - specifically at both ends of the heat spreader sheet where it contacts adjacent battery modules. This localized quality approach ensures heat transfer prevention at the most vulnerable points, maintaining reliability even when overall heat dissipation capacity is limited.

The thermal management system uses a composite structure combining heat spreader sheet (high thermal conductivity material) with thermal insulation pads (low thermal conductivity material). This composite approach allows heat to be conducted away from the module interface while simultaneously insulating against heat diffusion to adjacent modules, overcoming the limitations of using insulation alone.