ATT Advanced Thermal Technologies

ATTBattery Diagnostic System

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The service life of extremely stressed traction batteries depends heavily on whether the cells are operated in the optimal temperature range of 15 °C to 35 °C. If only one cell exhibits problems, this has an impact on the entire module. In addition to effective thermal management, this also requires precise knowledge of the thermal behavior of the cells under all operating conditions. When characterizing the cells, they are subjected to extensive endurance tests with constantly changing loads, during which the cell temperature on the entire surface must also be measured and recorded. The more precise the measurements, the more reliably predictions can be made about the thermal behavior in real operation.
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The ultra-thin measuring foil (200µm) with up to 27 independent surface temperature sensors is simply stuck around the individual battery cell. Activated, it provides information about its state of health in real time and logs the measurement data. The data can be evaluated correspondingly quickly using the evaluation software included in the system. With this special diagnostic system, users can get a deep insight into battery health during operation.

Some facts about the system

  • Up to 27 temperature sensors
  • Size and contour of sensors freely definable
  • Adaptable CAN interface allows adaptation for direct communication with various BMS
  • Optional double-sided adhesive tape for application
  • Extremely fast thermal response time (real-time capable)
  • Daisy chaining of several devices possible
  • Ultra-thin sensor structure 200µm
  • Measuring frequency maximum 0.66 Hz (1.5 s) with 27 temperature sensors
  • Measuring frequency maximum 3.33 Hz (0.3 s) with 3 temperature sensors

Versatile Applications

The ultra-thin design in combination with the sensor geometry and resolution, which can be adapted depending on the application, enables a minimally invasive solution for temperature monitoring inside batteries - not only in e-vehicles: Of course, the system is also suitable for other applications - it is particularly attractive for areas of application where the available space is limited and spatial resolution plays a role.