Monitoring Cell Temperature to Optimize Battery Performance and Design



The optimal function of Li-ion batteries is confined to restrictive temperature and voltage windows. Internal faults can initiate heating, triggering a positive feedback loop that results in thermal runaway. The worst case scenario resulting from this is an explosive hazard and potential harm to lives.

Current monitoring techniques are generally limited to battery management systems that utilize a few discrete single-point sensors, and scaling up of sensor count with higher capacity packs is typically prohibitive. Research into the detection of the onset of failure focuses largely on internal modifications to the cells themselves. However, a safer, more powerful and cost-effective solution to detect and provide warning of battery faults well in advance of failure is necessary.

Join us for this webinar to learn how dielectrically insulated fiber optic sensors can be integrated into battery packs and assemblies to monitor for rapid increases in temperature at the level of individual cells as well as to monitor for increases in strain consistent with pack swelling.

Key Takeaways

  • High-definition fiber optic sensing (HD-FOS) technology for distributed temperature and strain measurements
  • Deploying HD-FOS for cell temperature measurements
  • Integrating sensors into battery packs
  • Using HD-FOS analysis to optimize pack and containment design
  • Early detection of cell failure using HD-FOS


Aida Rahim, Ph.D., Senior Applications Engineer, Luna Innovations