How to Select Structural Adhesives for Power Batteries? Recommended Grades for Bonding Cells, Trays and Cooling Plates

Power battery structural adhesives shall be selected according to bonding positions, structural load capacity, modulus, impact resistance, thermal conductivity requirements and rework demands.For flexible structural bonding between cells, Elaplus PUR 1610 is available for evaluation; PUR 1665 is recommended when both thermal conduction and bonding performance are required; MSEP 2018, MA 9130AB or PUR 1603S can be assessed for bonding battery upper/lower covers and stiffeners; TCMP 1920-2K is suitable for areas between battery modules and cooling plates where disassembly and rework are necessary. Battery Pack Sealing Where Are Structural Adhesives Applied in Power Batteries? A power battery pack is not merely an arrangement of cells inside a tray. It is a complex structure continuously subjected to vibration, collision, temperature fluctuation and expansion during charging and discharging. Common bonding positions for structural adhesives: Different positions bear loads in different directions and serve distinct functions, so a single high-hardness structural adhesive cannot satisfy all application scenarios. Recommended Grades for Cell Structural Bonding PUR 1610: Flexible Polyurethane Structural Adhesive PUR 1610 is a 1:1 two-component polyurethane structural adhesive featuring excellent flexibility, low modulus, strong adhesion and outstanding impact resistance. Cell Structural Bonding Suitable applications: Cells may undergo slight dimensional changes during charging/discharging and temperature cycling. The flexible adhesive layer formed by PUR 1610 delivers reliable bonding strength while reducing mechanical constraints imposed by rigid adhesives on cells. PUR 1665: Thermally Conductive Polyurethane Structural Adhesive PUR 1665 is a 1:1 two-component thermally conductive polyurethane structural adhesive capable of structural bonding and heat transfer simultaneously. Suitable applications: Elaplus PUR 1665 achieves thermal conductivity ranging from 1.2 ~ 2.0 W/m·K, with a typical formulation of 1.3 W/m·K listed in the datasheet. Adhesive Selection for Battery Upper/Lower Covers & Stiffeners MSEP 2018: Tough Hybrid Structural Adhesive Battery Pack Sealing MSEP 2018 is a 2:1 hybrid structural adhesive…