Honeywell BES Battery Safety Electrolyte Detector
Honeywell BES Battery Safety Electrolyte Detector is designed for early detection of venting and thermal runaway in battery systems. This detector uses an advanced and patented rate-of-change algorithm to detect the battery electrolyte vapor released during the initial venting phase called the first vent. The ability to detect the first vent provides early warning for potential thermal runaway incidents on Lithium-ion battery packs. The BES detector provides three types of output through a CAN message. This detector operates in eco mode and normal mode, which can be selected through the CAN command.
The BES detector features a 1.3 million hours/150.86 years MTTF/MTBF, <2 seconds startup time, <5 seconds response time, and 20V maximum reverse voltage. This automotive-grade detector complies with QM-grade safety rating, IP3X ingress protection, and UL 94V-0 flammability standards. The BES detector is used in sealed lithium-ion battery packs, modules in electric or hybrid vehicles, and on-road applications.
Features
- Responsive to battery electrolyte vapor released during the first vent (before thermal runaway)
- Patented rate of change algorithm to mitigate false negatives
- Responsive to carbon monoxide gas released during thermal runaway
- Responsive to hydrogen gas released during thermal runaway
- Resistant to siloxane poisoning
- Compatible with all Lithium-ion battery chemistries and cell types
- Automotive product with CAN 2.0B output with diagnostic functions
- Tested for performance life of 15 years
- Provides 3 types of output through a CAN message:
- Scalar value indicating the volume of gas released by the Li-ion battery cell(s)
- Ambient temperature value
- Alarm flag indicates a thermal event
- Operating modes (eco or normal) selectable through a CAN command
Applications
- Sealed lithium-ion battery packs
- Modules in electric or hybrid vehicles
- On-road requirements
Specifications
- 1.3 million hours/150.86 years MTTF/MTBF
- <2s startup time
- <5s response time
- 20V maximum reverse voltage
- 26V maximum over voltage for 60s
- 0% RH to 90% RH humidity range
- Power consumption:
- 9mA typical in eco mode
- 20mA typical in normal mode
- IP3X ingress protection
- UL 94V-0 flammability
- QM-grade safety rating
Product Dimensions
Related Detector
Honeywell BES LITE Battery Safety Electrolyte Detector
Detects battery electrolyte vapor to provide advanced warning of potential thermal runaway.
Published: 2025-02-16
| Updated: 2025-02-24