Denka Inter-Cell Heat Insulation Material for Lithium-Ion Batteries Enhances Thermal Safety

Denka Company Limited announced the development of the Denka inter-cell heat insulation material designed specifically for lithium-ion batteries used in automotive and stationary energy storage systems. The Denka inter-cell heat insulation material integrates proprietary ProfyGuard heat insulation technology with a specialized cushion structure to enhance thermal stability, mechanical protection, and overall battery safety. As lithium-ion batteries become central to electrification strategies, solutions like the Denka inter-cell heat insulation material play a critical role in improving system-level protection against overheating and chain reactions.

Denka inter-cell heat insulation material for lithium-ion batteries

The Denka inter-cell heat insulation material combines a ProfyGuard heat insulation, flame retardant material developed by Denka with a cushion material leveraging rubber product manufacturing technology from its subsidiary Denka Elastlution Co., Ltd., located in Takasaki City, Gunma Prefecture, Japan. This integrated configuration addresses both thermal and mechanical challenges within lithium-ion batteries modules.

Optimized porous structure for thermal control

The heat insulation component of the Denka inter-cell heat insulation material features an optimized porous structure formed through heat absorption and foaming processes. This structural optimization maintains high thermal insulation performance under operating conditions. By limiting heat propagation between adjacent cells, the Denka inter-cell heat insulation material supports effective thermal runaway prevention in densely packed battery modules.

Integrated cushioning for mechanical stability

Beyond thermal management, the Denka inter-cell heat insulation material incorporates a cushion layer engineered to respond to the expansion and shrinkage of battery cells during charge and discharge cycles. Lithium-ion batteries experience dimensional changes over time, and uncontrolled mechanical stress can accelerate degradation. The cushion functionality within the Denka inter-cell heat insulation material absorbs these stresses and protects cell integrity.

Enhancing durability in real service conditions

Denka is currently conducting evaluations of the Denka inter-cell heat insulation material under actual service conditions. These validation efforts focus on confirming insulation performance, structural resilience, and compatibility with automotive battery packs and energy storage systems. The balanced combination of flame retardant properties and mechanical adaptability enhances long-term reliability.

Application in automotive and energy storage systems

The Denka inter-cell heat insulation material is intended for adoption in passenger cars and stationary energy storage systems where lithium-ion batteries safety remains a top priority. By reducing the risk of heat transfer between cells, the Denka inter-cell heat insulation material mitigates cascading failure events and contributes to safer electrification infrastructure.

Expansion of the ProfyGuard product portfolio

The company plans to manufacture and commercialize the Denka inter-cell heat insulation material as part of its ProfyGuard series. This addition strengthens Denka’s advanced materials portfolio supporting electrification, safety, and battery performance optimization. With increasing demand for higher energy density systems, the Denka inter-cell heat insulation material provides a scalable solution for next-generation lithium-ion batteries applications.

Through integrated heat insulation and cushioning technologies, the Denka inter-cell heat insulation material reinforces thermal safety standards while enabling reliable deployment of lithium-ion batteries across automotive and stationary storage markets.