The DTSX is a unique and innovative temperature monitoring system that uses fiber optic cable as a temperature sensor.
Thermal Runway Risk in Manufacturing Process Shelves and Storage Shelves and its Impact on Business
When stacking large numbers of lithium-ion batteries in manufacturing process shelves, in temperature cycling tests such as aging, and in storage shelves, is it possible to detect early on if thermal runaway of the batteries has occurred?
Generally, temperature is monitored by point sensors. However, it is difficult to discover thermal runaway at an early stage just by one point sensor in cases where each individual shelf is large.
When damage spreads due to a late discovery, this directly leads to not just late deliveries but also the affect on the supply chain impacts society and the economy.
Solutions and Benefits
Comprehensive / economical monitoring of manufacturing process shelves and storage shelves with fiber optic cables
In the case of point sensors that have been used up till now, considerable costs are assigned to installation, wiring and treatment of cable ends on each individual shelf, which also lengthens work periods.
After installation, verifying the soundness of significant numbers of point sensors also has become an issue.
The fiber optic heat detector DTSX can comprehensively monitor all shelves as fiber optic cable is installed even in large individual shelves. This is being adopted as a new means of resolving issues such as a longer work period, initial expenses and increased maintenance costs resulting from the use of point sensors.
It can be flexibly configured and set to suit on-site environments as a means of detecting abnormal temperature in a way different from that of point sensors as it supports a difference with external thermometer alarm in addition to simple upper limit and rate-of-change alarms. This leads to discovery at an early stage and quick initial response which limits damage to a minimum.
DTSX conforms to EN54-22 the EU fire detection and fire alarm system standard, and is currently used as a fire detection sensor, and is being adopted in automatic physical distribution warehouses other than lithium-ion battery production processes and in various other applications.
Features of Optical Fiber Sensing in DTSX System
The Fiber Optic Cable Is The Temperature Sensor
Temperature distribution monitored every 1 m
- Monitoring distance : to 50 km
- Monitoring temperature : -200 to 300 °C
- Shortest monitoring cycle : Approx. 5 seconds
- Temperature resolution : 0.03 °C
*: each specification dependent on conditions
- 24 hours a day, 365 days a year monitoring even in wide areas and ordinarily non-manned areas
- Power supply not required, explosion-proof, not affected by electromagnetic noise
- Flexible installation
- High compatibility with DCS and other host systems (Modbus / TCP)
Other In-vehicle Lithium-ion Battery Applications
Monitoring of Soundness of Power Supply Bus Bar
The soundness of the joints of the power supply bus bar installed in lithium-ion battery is monitored. Abnormalities are not overlooked as fiber optic cable is built into the bus duct and bus bars extending over long distances in blind areas such as roof space are comprehensively monitored.
(For details, refer to "Monitoring of Soundness of Power Supply Bus Bar -In-vehicle Lithium-ion Battery Applications-".)
Prevention of Fires in Exhaust Air Ducts in Battery Assembly Process
Fires or dust explosions in exhaust air ducts for preventing the influx of aluminum dust in the assembly process of lithium battery batteries are monitored. Abnormalities are not overlooked as ducts extending over long distances in blind areas such as roof space are comprehensively monitored.
(For details, refer to "Prevention of Fires in Exhaust Air Ducts in Battery Assembly Process -In-Vehicle Lithium-ion Battery Applications-".)
Monitoring of Separator / Electrode Coating Drying Furnace Temperature Distribution
The temperature distribution inside the drying furnace of the coating drying process for the separators / electrodes that make up a lithium-ion battery is visualized. Optimizing the temperature profile improves productivity.
(For details, refer to "Monitoring of Separator/Electrode Drying Furnace Temperature Distribution -In-Vehicle Lithium-ion Battery Applications-".)
YOKOGAWA provides equipment and solutions that support various battery manufacturing processes.
Related Products & Solutions
DTSX1 Fiber Optic Heat Detector
DTSX1 stores the functions required for heat detection in one box. DTSX1 analyzes the temperature data with high accuracy by measuring with fiber optic sensor cable and perform high temperature heat detection.
DTSX200 Distributed Temperature Sensor
The DTSX200 is a standard version that is ideal for temperature measurement, for medium-sized areas, and for areas where the distance of fiber optic sensor cables is short. It has excellent environmental resistance because it consumes less power and is less dependent on the temperature measurement environment.
DTSX3000 Distributed Temperature Sensor
The DTSX3000 is a distributed temperature sensor developed in response to the demand that “one unit be used to monitor temperature distribution a longer distance and a wider area”. A flagship model that meets the expectations for long-distance temperature measurement and high temperature resolution.
Fiber Optic Temperature Sensor DTSX
The DTSX fiber optic temperature sensor, which uses optical fiber for the temperature sensor, quickly detects and locates abnormalities in equipment by monitoring temperatures at production facilities located far away and across wide areas 24 hours a day, without omission. Highly accurate predictive maintenance avoids downtime and ensures stable plant operation.