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Engineered to mitigate hotspot accumulation across high-density automotive printed circuit boards without risking electrical breakdown.
In high-voltage Electric Vehicle (EV) platforms shifting from 400V to 800V architectures, Battery Management Systems (BMS) endure extreme electrical fields and intense thermal flux. Non-conductive epoxy bridges the thermal gap without creating electrical leakage paths.
Eliminates arcing, partial discharge, and micro-short risks between dense PCB traces under high-voltage transients.
Filled with spherical aluminum oxide & boron nitride to ensure anisotropic/isotropic thermal conductivity up to 3.5 W/m·K.
Tailored Coefficient of Thermal Expansion matches copper, FR4, and silicon substrates to prevent solder joint fatigue.
Certified flame retardancy and long-term resistance to automotive automotive thermal cycling (-40°C to +150°C).
Modern Battery Management Systems must continuously calculate State of Charge (SOC), State of Health (SOH), and monitor millivolt-level cell deviations. High-speed Analog Front-End (AFE) ICs and balance switches generate concentrated heat. Using thermally conductive, non-conductive epoxy provides direct thermal pathways from chip packages to the cooling plate or enclosure without risking busbar-to-ground short circuits.
Automotive PCBA units are subjected to multi-axis mechanical shock, vibration, and thermal expansion strains. Unlike traditional thermal pads that experience pumping-out or drying, thermosetting non-conductive epoxies cure into a rigid or semi-flexible matrix that locks components in place, safeguarding brittle solder balls against shear stress.
Exposed to condensation, battery electrolyte vapors, flux residues, and temperature swings, exposed PCB traces degrade rapidly. Applying an insulating, thermally dissipative epoxy layer prevents electrochemical migration (ECM), dendritic growth, and corrosion across fine-pitch IC leads.
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.
Pioneering specialized adhesive formulations for the world's most demanding automotive, industrial, and energy storage ecosystems.
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.
Evaluating the electrical insulation and thermodynamic characteristics of polymer matrix chemistries in EV battery management systems.
| Property / Parameter | Songxi Non-Conductive Epoxy | Standard Thermal Grease | Silicone RTV Gel | Polyurethane Potting |
|---|---|---|---|---|
| Thermal Conductivity (W/m·K) | 1.5 – 3.5 W/m·K | 1.0 – 4.0 W/m·K | 1.0 – 2.5 W/m·K | 0.8 – 1.8 W/m·K |
| Dielectric Strength (kV/mm) | > 22 – 28 kV/mm | < 5 – 10 kV/mm (Unstable) | 18 – 22 kV/mm | 15 – 20 kV/mm |
| Volume Resistivity (Ω·cm) | ≥ 1.0 × 1015 | 1.0 × 1011 | 1.0 × 1014 | 1.0 × 1013 |
| Mechanical Bonding Strength | High Structural Shear (>15 MPa) | Non-bonding (0 MPa) | Low Elastic Tack (<2 MPa) | Moderate Bond (5–8 MPa) |
| Siloxane Outgassing Risk | Zero (100% Silicone-Free) | High (Risk to relay contacts) | Medium to High | Zero |
| Automotive Thermal Shock (-40 to +150°C) | Passes AEC-Q200 Grade 0/1 | Prone to pump-out & dry-out | High stability, soft matrix | Degrades above 125°C |
1. Cell Monitoring Unit (CMU) Slave Boards: Installed directly above battery cell groups, CMU boards run multi-channel balancing resistors that release substantial localized joule heat during fast charging cycles. Songxi's non-conductive epoxy acts as a heat spreader, routing heat efficiently to the module casing while insulating high-voltage cell poles.
2. Master Control Board (BMU) Processing Units: Houses high-frequency processors, ISO SPI communication modules, and power conversion ICs. High-dielectric epoxy ensures that signal traces operating at high bitrates do not experience capacitive distortion or parasitic leakage.
3. High-Voltage Relay & Pyro-Fuse Interconnects: Thermal interface epoxies prevent thermal runaway triggering in sensing shunts and high-current contactor junctions, ensuring long-term functional safety according to ISO 26262 ASIL-D standards.
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.
Complete product spectrum designed for electric vehicles, airborne radar systems, PCBA bonding, and extreme-environment electronics.
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.