Bigbong Glue Mall
Structural polyurethane adhesives are used for cell-to-cell bonding to ensure the battery’s long-term durability. These adhesives keep the cells firmly in place throughout the vehicle’s lifespan.
Adhesives offer many advantages to both traditional as well as electric vehicles, including; ease of use compared to welding, environmental resistance, sealing, distributing stress, and joining mis-matched materials – e.g. plastic to metal. However, the use of adhesives in electric vehicles is even more widespread than their use in conventional automobiles. The reasons for this include their ability to bond composites and low surface energy plastics, which results in a lower component weight, improved thermal conductivity and electrical insulation.
Typical EV adhesive applications:
- Bonding battery boxes
- Encapsulating with expandable thermally conductive filler
- Bonding battery cells to casings
- Bonding and potting sensors
- Bonding magnets in electric motors
- Bonding doors, hood, and trunk components
- Threadlocking and retaining bolts, pins, and bearings
- Bonding interior dashboard and trim
- Sealing heat exchangers
- Forming gaskets
Bonding Electric Vehicle Battery Boxes
Adhesives are often used to bond and seal the lid of the battery pack to the body. High-performance plastics help keep the battery lightweight and durable, as well as offering vibration, impact and weather resistance. However, these plastics are often filled and can prove quite difficult to bond – special adhesives are therefore needed to offer the level of adhesion required. Non-setting / blow-out gasket materials are also used for battery sealing applications; in the event that if there is a thermal-runout, pressure can be released from the battery without causing the casing to explode. In normal day to day operation the uncured “polyurethane adhesive” material remains in situ, thus preventing moisture ingress or contamination of the battery. It also allows for easy battery servicing if required.
Potting / Filling Space Around EV Battery Cells
Bigbong is proud to share news of its Patent-Pending thermally conductive expanding foam innovation. We developed this exciting new material to expand and fill space around battery cells whilst providing thermal management to help dissipate heat away from cells, thus helping prevent thermal run out. This expanding adhesive has a number of benefits:
- Lightweight – this helps improve vehicle performance as well as efficiency and makes lifting and handling the battery easier
- High level of fire retardancy – inclusion of intumescent filler material
- Excellent thermal conductivity
- Cures at room temperature
