Brother Gong in Berlin sent me an introduction. I found it very interesting. I extracted a part of the introduction for your reference. I want specific information or discuss how to use it.
Application opportunities of fiber optic sensors
Temperature is the most direct physical response to battery safety -> electronic sensors (thermistors, etc.) and BMS monitor the temperature of the module in real time, but the temperature monitoring points are sparse and outside the battery cell. Thermal runaway problem?
Strain is an important physics that reflects the health (life) of the battery -> At present, the real-time field strain monitoring method of the battery is rare. The electrical (chemical) test results plus the algorithm estimation, the adaptability is not independent.
Simulation results of battery cells and modules -> difficult to experimentally verify
Sensing principle of FBG sensor
Point sensor monitoring
Distributed continuous monitoring
The internal temperature measurement of the implanted soft pack battery (external)
Optical fiber sensor is implanted inside cylindrical battery to measure temperature and strain (external)
Power lithium battery cell monitors existing application status
German cell manufacturers use fsFBG to monitor cell temperature, electrode strain and module strain.
Japanese manufacturers have reserved optical fiber sensors in the modules to facilitate the inspection of battery health during annual inspections
Summary: This is added to the Pilot test line. It is worth considering to obtain the parameters during the preliminary development and testing for your reference.
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