Dear customer,

At the end of the year we would like to thank you for the trust you have placed in us, but also for the great, inspiring cooperation. We say goodbye to the new year with some news:

Insulation cell pads in car batteries - application-oriented characterization

In the past few months, we have received an increasing number of inquiries about the thermal characterization of insulation materials for use in EV batteries. The cell pads are installed between the individual battery cells and are intended to protect the neighboring cells from the high temperatures of the defective cell at a thermal runaway event.

In order to be able to characterize and test the cell pads even better and in an application-oriented manner in the future, we are currently designing a new thermal test bench, the Thermal Propagation Tester (TPT). With this the real installation situation of the cell pads in the battery can be simulated and a thermal runaway can be simulated. The aim is to determine the thermal properties of the cell pads transiently and thus to include all relevant effects, such as the melting or evaporation of individual components or mechanical compression.

In addition to the transient thermal properties, which can be used to compare materials or as input variables for battery simulations, the new measurement method also provides very practical information: the temperature profile over time on the cold side of the material. It is thus possible to assess which temperature affects the intact cell to be protected.