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Explore our high-performance silicone sealant tubes, gap fillers, and conductive adhesives engineered specifically for electric vehicle battery systems.
Addressing the critical thermal bottlenecks, mechanical stresses, and safety thresholds in modern cell-to-pack (CTP) and cell-to-chassis (CTC) platforms.
The global transition toward electromobility has catalyzed aggressive engineering improvements in lithium-ion and solid-state energy storage systems. As electric vehicle (EV) architectures migrate toward 800V fast-charging systems and gravimetric energy densities exceeding 250–300 Wh/kg, thermal management within power battery modules has evolved from a passive auxiliary consideration to a vital determinant of safety, charging throughput, and cycle longevity. Within this demanding framework, the silicone sealant tube for EV power battery module thermal management plays a pivotal role as both a primary heat-dissipation conduit and a resilient structural barrier.
Direct thermal coupling between cylindrical, prismatic, or pouch cells and liquid cooling plates, maintaining delta-T across cells below 3°C.
UL 94 V-0 ceramic-forming silicones withstand flash temperatures over 800°C, insulating adjacent cells against cascading thermal failure.
Low modulus elastomeric polymer networks dissipate severe road vibrations, preventing mechanical stress on delicate tab welds.
In high-capacity battery packs, uneven localized heat generation during peak discharge or ultra-fast charging creates internal temperature gradients. If unchecked, these hotspots accelerate localized cell degradation, cause lithium plating, and in extreme cases, initiate irreversible thermal runaway. Conventional thermal pads frequently suffer from high contact resistance, poor tolerance accommodation across large surface areas, and assembly bottlenecks during robotic pick-and-place. Pre-packaged silicone sealant tubes and cartridges offer the viscosity control, automated bead repeatability, and zero-void surface wetting necessary to bridge sub-millimeter micro-gaps between battery cells and aluminum cold plates.
The technological core of an EV battery silicone sealant tube lies in the high-density suspension of engineered functional ceramic fillers (such as micro-calcined alumina, aluminum nitride, and spherical boron nitride) within a polydimethylsiloxane (PDMS) backbone. By precisely calibrating multi-modal particle size distributions, formulators achieve thermal conductivity ratings from 1.5 W/m·K to over 4.5 W/m·K while maintaining pumpable rheology and exceptional thixotropy. When dispensed from standardized silicone sealant tubes, the shear-thinning matrix flows effortlessly under pneumatic or electric dispensing pressure, settling into micro-cavities before instantly recovering zero-slump yield strength.
Automotive-grade battery applications mandate strict controls on low-molecular-weight siloxane cyclics (D4 through D10 volatiles). In unvented or sealed battery trays containing sensitive optical sensors, high-voltage busbar switches, and Battery Management System (BMS) microcontrollers, volatile silicone vaporization can lead to contact oxidation and sensor contamination. Advanced vacuum stripping and thin-film devolatilization ensure that modern silicone sealant tubes comply with rigorous automotive VDA 278 and Telcordia outgassing standards, ensuring absolute electrical stability over decades of vehicle operation.
From cell-to-plate interfacial heat sinks to high-voltage busbar potting and perimeter environmental sealing.
Modern battery pack architectures—spanning Cell-to-Module (C2M), Cell-to-Pack (CTP), and Cell-to-Chassis (CTC)—demand multifunctional material capabilities. A single silicone sealant tube dispensing station can be configured to address multiple distinct engineering challenges across the pack assembly sequence:
A. Cell-to-Cold-Plate Interfacial Thermal Interface Material (TIM): During high-speed continuous discharging, heat generated in the lower third of the cell core must conduct seamlessly into the bottom-mounted liquid cooling channels. Single-component (1K) and dual-component (2K) silicone formulations extruded from tubes displace trapped insulating air voids, drastically lowering thermal impedance ($R_{th}$) below 0.15 °C·cm²/W under moderate compression loads.
B. BMS Microcontroller & Sensor Potting: The Battery Management System serves as the neural center of the battery pack, monitoring telemetry, thermistors, and balancing circuitry. Tube-applied potting silicone provides complete moisture exclusion (IP68/IP69K), dielectric insulation surpassing 15 kV/mm, and high shock resistance, insulating fragile surface-mount components from thermal cycling shocks ranging from -40°C to +150°C.
C. High-Voltage Junction Box & Busbar Shielding: To mitigate electromagnetic radiation emitted by high-frequency switching inverter components and high-voltage DC lines, specialized EMI shielding silicone sealants infused with silver-plated or nickel-graphite particles provide both galvanic seal integrity and greater than 60 dB electromagnetic attenuation across wide gigahertz frequency bands.
D. Pack Upper Enclosure Hermetic Sealing: Preventing moisture ingress, salt-spray corrosion, and dust particulate intrusion into the battery shell is essential for automotive safety standards. Elastic silicone sealants maintain long-term adhesion to diverse substrates (e.g., E-coated steel, passivated aluminum alloys, and carbon-fiber reinforced polymers) without necessitating hazardous chemical primers.
Songxi Technology is a high-tech enterprise specializing in the R&D, production, and sales of electronic adhesives. Based on silicone, polyurethane, acrylic, and epoxy systems, we provide reliable bonding, sealing, and protection solutions for power electronics, optoelectronics, new energy, automotive, and aerospace industries.
We are committed to becoming a trusted provider of functional polymer material solutions for the electronics industry. Through continuous innovation and application development, we promote the localization of high-end electronic adhesives and help intelligent devices achieve greater stability and durability.
Engineered adhesive, sealing, and thermal conductive polymer technologies designed to power global industrial transformations.
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.
Led by a Ph.D. in Polymer Materials from Sichuan University, Songxi's R&D team has nearly twenty years of silicone application experience and has participated in over 100 product development projects. We maintain cooperation with research institutions including Chenguang Chemical Research Institute, Sichuan University, and Beijing Institute of Technology.
Certified with ISO9001, Songxi operates a comprehensive management system covering procurement, production, inspection, and after-sales service. Our products comply with RoHS and REACH requirements, with SGS verification and UL 94 V-0 flame retardant certification, ensuring consistent quality and reliable delivery.
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.