Validation of printed temperature sensor arrays using a novel self-healing effect and without the need for recalibration after mechanical stress


Printed arrays of temperature sensors for the Li-Ion battery market in second life. Self-healing effect as a further contribution to resource economy.

Energy storage is becoming increasingly important in the energy transition. The requirement for rapid availability of a reserve for grid stabilization can be achieved very well using Li-ion batteries. These energy storage systems compete with the need for Li-ion batteries for electric cars. Particularly because recycling Li-ion batteries does not recover all valuable materials, Li-ion batteries with SOH1 < 80%, which have been retired for their primary use in electric cars, are used as energy storage to stabilize the grid before recycling (Second Life).

At the Helmholtz-Zentrum Dresden-Rossendorf we have developed a technology that allows us to create temperature sensors using printing techniques with previously unknown self-healing properties. In addition to being “repairable”, our temperature sensors also show approximately 2 times better sensor sensitivity when measuring temperature, which indirectly increases cost efficiency. We estimate the global market for our innovative temperature sensors in the rechargeable battery segment alone to be around 20 million. € per year.

As part of the project we will provide functional paste, printed sensor elements and printed sensor arrays. Other types of sensors, including those for measuring other physical quantities, are possible with this technology. After the project is completed, we want to found a spin-off that will focus on the production and marketing of printed sensors for measuring temperature and printed, self-healing sensors for other measurements and applications.

In addition to our partners LioVolt GmbH, Beifuss Industrie Systeme GmbH and Freudenberg Siebdruck GmbH, we are looking for other companies as partners for this project.