Optimization of Battery Safety

Teststand zur Sicherheitsuntersuchung.
© Fraunhofer ISE
Test stand for safety inspection.
Typischer Temperaturverlauf einer Sicherheitsuntersuchung.
© Fraunhofer ISE
Typical temperature curve of a safety investigation.

We conduct safety tests on batteries and battery cells. In doing so, we can gain from extensive understanding of correlations and processes with the goal to design measures to optimize safety.

Safety tests on batteries

Experimental investigation is essential for understanding the safety of lithium-ion batteries. In our lab, batteries are brought into safety-critical states using various triggering methods. During and after these tests, a wide range of sensors are used to record data on factors such as temperature, voltage, pressure curves or gas development. These data allow us to determine the properties of safety-critical states and to develop countermeasures.

Crush tests: Destructive tests to optimize battery safety

Furthermore, we are investigating various scenarios that batteries are exposed to during their use. We are particularly focusing on situations that deviate from everyday use in line with the intended purpose. For example, a crush test can be used to test the penetration of a foreign body into a battery as well as the crushing and bending of a battery. Such tests can provide important information about battery behavior in accidents and in the event of improper handling. Battery safety is of crucial importance, especially when it comes to their use in electric vehicles. With our detailed analyses, we are able to provide valuable assistance in optimizing battery safety.

Our R&D Services on the Topic "Optimization of Battery-
Safety" Include:

  • Safety tests on battery systems and battery cells
  • Investigation of thermal runaway
  • Investigation of mechanical deformation / crushing
  • Propagation test on battery modules and battery systems
  • Test of materials for inhibiting propagation
Quetschprüfung einer häufig in tragbaren Geräten (z.B. Notebooks, Powerbanks) oder manchmal auch in E-Fahrzeugen genutzten Lithium-Ionen-Batterie (18650).
© Fraunhofer ISE
Crush test of a lithium-ion battery (18650) often used in portable devices (e.g. notebooks, powerbanks) or sometimes in e-vehicles.
Während des Tests können Spannung, Temperatur, Eindringtiefe, Geschwindigkeit des Quetschprofils und Kraft präzise gemessen werden
© Fraunhofer ISE
During the test, voltage, temperature, penetration depth, speed of the crush profile, and force can be precisely measured.
Nach dem thermischen Durchgehen brennt die Batterie innerhalb der geschützten Testumgebung aus. Parallel werden die gesammelten Daten analysiert und in einen detaillierten Prüfbericht eingearbeitet.
© Fraunhofer ISE
After thermal runaway, the battery ignites within the protected test environment. In parallel, the collected data is analyzed and incorporated into a detailed test report.

More Information on this Research Topic

 

Lab Battery Engineering, Production and Testing

Lab Battery Engineering, Production and Testing

 

ecoLEPuS

Second Life Batteries for Use in High-Performance Applications Using the Example of Buffer Storage in Charging Infrastructure

 

PLöPPS

Development of Passive Solutions to Inhibit Propagation in Stationary Storage Systems