Rugged Monitoring’s Fiber Optic battery temperature sensors are being used by battery design/test engineers at each stage for battery performance testing:
- Battery cell core and anode thermal profiling for fast charging
- Intercell temperature monitoring in Battery Modules
- Battery pack abuse testing and HV connectors temperature testing
The CANBUS is implemented to communication with Battery Management System or dataloggers. Also, RM sensors and monitors are easy to use as they don’t require calibration or complex inputs along with being rugged and suitable for all test conditions. Also, RM sensors have a higher immunity to electromagnetic interferences which increases the testing accuracy and reliability while being having a very fast response time of 0.1ms to 1ms that helps identify a sudden shift in the temperature within the cells. The state-of-the-art sensors of RM such as LSENS-B, LSENS-T, LSENS-R are most reliable option that provides accurate, fast results while being easy to setup and use. The EV test rigs come with built in Fiber Optic temperature monitors , R501, O201 etc.
Why fiber optics sensors are best choice for battery thermal monitoring in EVs?
Design engineers need systems that provide smart analysis for performance maximization in the pouch battery cell. This smart analysis can be best performed by using fiber optics sensors because they have accurate and noise-free readings that don’t create any kind of strain or pressure in the pouch cell. Also, they have a very very small footprint (0.4mm) so they can fit into the core of the cell and it is adjustable at different locations. These sensors are electrically, magnetically, and chemically stable. This is possible because of the polyimide coating which makes the sensors suitable for chemical environments. Furthermore, FO sensors are much safer to use than traditional temperature monitoring sensors such as thermocouples which are made from metal so they can cause short circuits at high voltages. But this problem doesn’t apply for FO sensors as it uses a GaAs crystal which is a non-metal so it is a lot safer to use than thermocouples and FO sensors also ensure the safety of the battery prototype so there is no risk of fire damage to the cell itself. Additionally, FO sensors produce accurate, reliable, and fast results without any measurement inaccuracies which is not the same for thermocouples as they are susceptible to electromagnetic frequencies.