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The Battery Safety Electrolyte Sensor (BES) is an automotive-grade sensor designed for early detection of venting and thermal runaway in battery systems. Utilizing an advanced and patented rate-of-change algorithm, the BES detects battery electrolyte vapor commonly released during the initial venting phase called First Vent, as well as hydrogen and carbon monoxide gases released during a thermal runaway event.

The ability to detect the First Vent provides an essential early warning for potential thermal runaway incidents in Lithium-Ion battery packs. This proactive early detection facilitates timely and appropriate mitigation measures, significantly reducing the risk of thermal runaway. BES employs a patented advanced rate of change algorithm designed to identify significant changes in the concentration of target gases within a sealed battery pack. This innovative method effectively reduces the occurrence of false negatives that may be seen with conventional ppm-based sensors, which focus on precise target gas threshold monitoring. The algorithm is tuned to prevent false positives, improving the end-user experience. Furthermore, the algorithm is supported by more than 12 years of rigorous research and validated through seven years of practical field deployment.

This extensive experience not only enhances the reliability of the detection algorithm but also underscores its effectiveness in real-world applications. BES enhances the safety and reliability of automotive battery systems.

Featured

• Responsive to battery electrolyte vapor released during the first vent (before thermal runaway)
• Responsive to hydrogen and carbon monoxide released during thermal runaway
• 12 V and 24 V supply voltage options
• Patented rate of change algorithm to mitigate false negatives
• Resistant to siloxane poisoning
• Compatible with all lithium-ion battery chemistries and cell types
• Automotive product with CAN 2.0B output with diagnostic features
• Tested for a performance life of 15 years

Applications

Sealed lithium-ion battery packs or modules used in electric, hybrid vehicles, and other on-road applications.

Click here for a datasheet.

BES LITE is a cost-effective, low-profile, lightweight battery safety detector that uses Honeywell proprietary gas sensing technology to selectively detect battery electrolyte vapor, an indicator of thermal events. This provides an advanced warning of potential thermal runaway in lithium-ion battery packs.

BES LITE is designed to detect gases that are typically released during the initial phase of thermal runaway as well as throughout the entire thermal runaway process. This advanced detection capability facilitates the prompt identification of imminent dangers or risks, significantly enhancing safety measures in critical situations. Therefore, the sensor allows for proactive responses that can prevent loss of assets and protect lives.

Early detection may vary based on factors such as the nature of cell abuse and its severity, state of charge, and other variables. BES LITE allows compliance with international regulations and guidance by providing deterministic detection of thermal runaway events.

BES LITE is compatible with all lithium-ion battery chemistries and cell types, making it versatile for use in industrial lithium-ion battery packs. Engineered to support a ten-year lifespan, it aligns with the typical operational life of industrial equipment. As concerns over lithium-ion battery safety continue to rise, BES LITE stands out as the ideal battery safety detector, ensuring the protection of both personnel and assets.

Features

• Detects initial venting events before thermal runaway
• Provides early warning of thermal runaway events
• Selectively responds to electrolyte vapor
• Intrinsically safe with no internal heating element
• Inbuilt diagnostics functionality
• Low-profile, compact design
• Three-state analog output
• Customizable to specific application needs
• Compatible with all lithium-ion battery chemistries and cell types
• Ten-year sensor life
• Resistant to common contaminants
• Highly resistant to siloxane poisoning
• Optimized for industrial applications

Applications

• Sealed and portable lithium-ion battery modules used in
  • Battery Energy Storage Systems (BESS)
  • UAM/UAV
  • Micro-mobility
  • Medical devices
  • Light industrial goods

Click here for a datasheet.