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High-Strength PUR Structural Adhesive for EV Battery Module Housing Enclosures
Electromagnetic Interference (EMI) Shielding Silicone for Automotive Power Electronics
Black IPX8 Waterproof & Moisture-Curing Silicone Sealant for Battery Pack Perimeter Gaskets
Precision UV & Moisture Hybrid Dual-Cure Sealant for Optical Sensors & Battery Telematics
As battery energy densities approach 300 Wh/kg, localized hotspots during rapid charge-discharge cycles pose catastrophic risks. Formulated with inorganic functional thermally conductive micro-fillers and tailored siloxane backbones, black silicone sealants bridge the microscopic air gaps between battery cells, liquid cooling plates, and heat sinks. Their inherent thermal stability (operating from -50°C to +200°C) ensures reliable flame-retardant barriers that comply with UL 94 V-0, actively impeding cascading cell-to-cell thermal propagation.
Automotive environments impose rigorous vibrational fatigue, thermal expansion mismatches (CTE mismatch between aluminum cold plates, copper busbars, and plastic separators), and continuous cyclic shocks. Unlike rigid epoxies that risk micro-cracking over extended mileage, elastomeric black silicone sealants possess low modulus and high elongation at break, effectively serving as an integrated dampening layer that absorbs mechanical resonance while maintaining hermetic adhesion across extreme thermal fluctuations.
Battery module enclosures must resist water spray, coolant leakage (water-glycol solutions), road salt sprays, and volatile chemicals over a standard 10-to-15-year vehicle lifespan. The dense, cross-linked polydimethylsiloxane network provides exceptional hydrophobicity, weatherability, and resistance to environmental stress cracking, guaranteeing long-term hermetic integrity that prevents moisture ingress and electrochemical dendritic migration across high-voltage circuit tracks.
In modern structural battery packs, black silicone adhesive sealant acts as an elastomeric structural interface material. It creates a seamless, void-free conduction path directly between the bottom or side surfaces of prismatic/cylindrical cells and aluminum liquid cooling ribbons. Its controlled thixotropic index prevents slumping during automated robotic high-speed dispensing, enabling precise bead profiles that cure uniformly at room temperature or with accelerated mild heat.
Battery Management Systems (BMS) integrate sensitive sensing wires, thermistors, and microcontrollers. Black silicone sealants provide superior dielectric insulation (>20 kV/mm) and high volume resistivity, preventing parasitic capacitive coupling and protecting low-voltage sensing harnesses against high-voltage surges, condensation, and electrical flashovers.
Sealing the upper top cover to the lower aluminum or composite chassis tray requires high shear strength combined with elasticity. The black coloration offers enhanced UV opacity and aesthetic integration, ensuring the seal remains stable against ambient ozone exposure, engine-bay radiant heat, and harsh underbody gravel strikes without shrinkage or micro-fissuring.
Current-carrying busbars experience high thermal cycles during peak acceleration and ultra-fast charging. Primerless adhesion of black silicone formulations to nickel-plated copper, anodized aluminum, and engineering plastics (PBT, PA66) ensures busbars remain mechanically locked in place, eliminating solder joint fatigue and mechanical detachment.
Songxi's business covers three functional areas: adhesive & sealing, potting & protection, and thermal interface materials. Our product portfolio includes PCBA fixing adhesives, UV adhesives, sealants, thermal conductive potting compounds, thermal greases, pads, two-component thermal gels, EMI shielding sealants, and reactive hot melt adhesives.
Our products serve power batteries, photovoltaic modules, drones, automotive electronics, 5G communications, and LED lighting. We provide both standard products and customized solutions for applications such as BMS conformal coating, IGBT thermal filling, and power battery structural bonding, supported by extensive technical experience and application expertise.
Songxi adheres to integrity and quality throughout material selection, production, and delivery, turning reliability into a competitive advantage and earning long-term customer trust through professional service and continuous improvement across global markets.
Polyurethane hot melt adhesive — 8MPa tensile strength PUR adhesive passing 1.5m drop test
EMI shielding sealant — silver filled epoxy with over 60dB shielding effectiveness for airborne radar systems
General purpose silicone sealant with IPX8 waterproof dustproof performance
Anti-yellowing optical clear UV curing structural adhesive with high tensile shear strength
High dielectric strength PCBA component fixing adhesive preventing solder pad electrochemical migration
Heat dissipating potting silicone — two-component thermal gel for automotive battery BMS module thermal management
Songxi DR8516 primer-free elastic adhesive sealant for automotive lamp housing assembly
High Performance Flame Retardant Structural Sealant for EV Power Battery Pack Assemblies