I have to say it is balancing features. Many of the adhesive features battery manufacturers require play off each other.
Following is a partial list of commonly requested features:
As battery manufacturers work to improve safety, reduce weight, increase performance and lower costs of battery-powered vehicles and machines, adhesive chemists are rapidly developing new products with unique features to allow the advancement of e-mobility.
The features of these adhesives for electric vehicle batteries are dialed in to meet unique specifications. The challenge comes in balancing one or more characteristics against the others.
For example, high thermal conductivity is a common requirement. Batteries can get extremely hot while charging, and the faster the charge – the higher the heat. Of course, dissipating the heat between the battery cells and bonding the modules to the heat sink are goals of the adhesive. In addition, the adhesive ensures no water ingress, which could cause short circuits or damage to components. Another key feature the adhesive must have is high dielectric strength to provide good electrical resistance and prevent arcing.
High thermal conductivity is easy to achieve in adhesives. However, engineers must balance thermal conductivity against increased cost, viscosity, weight, and potential reduction in electrical resistance. Very high viscosity adhesives can be difficult to dispense, especially with automatic dispensing equipment.
Options are available to meet these challenges. Contact Permabond with your requirements.
Our technical team can make a recommendation or look into having a product tailor-made to your specifications.