CDI Blog For Engineers

Battery Leakage Detection Sensor from SGX Sensortech

SGX Sensortech at CDI
Battery Leakage Detection Sensor from SGX Sensortech

Thermal runaway has emerged as an ever-increasing safety concern in automotive, air and marine vehicles as these industries convert to using electrification. The push for the electrification of vehicles has created a rapid acceleration of the use of Lithium-ion (Li-ion) batteries. There are a number of failure modes during the battery lifetime that could occur in an Electric Vehicle, but the most common is a thermal runaway.

In the simplest terms, thermal runaway begins when the heat generated within a battery exceeds the amount of heat that is dissipated to its surroundings. If the cause of the excessive heat creation is not cooled or removed from the surroundings, the condition will worsen. As the internal battery temperature rises, the battery current will also rise — which in turn causes more heat.

This results in a domino effect, and thermal issues in a single cell can begin to affect other batteries in close proximity (or part of the same pack). Once underway, thermal runaway is difficult to control and rein in. To prevent any injury to the passengers, one solution is to send an alarm as soon as possible to the passenger to leave the car when there is any leakage detection. SGX offers two solutions: The SGX-BLD1 and the SGX-BLD2.

The SGX-BLD1 and the SGX-BLD2
A Battery Failure Detection sensor that measures H2 concentration when different battery leakage occurs through CAN communication
The same as the SGX-BLD1
Except it monitors both H2 and CO

• Fast response time (<1 second)
• Thermal conductivity gas sensor (high reliability technology)
• High H2 range detection from 0 up to 10%
• CO gas sensor (able to detect the venting phase before Thermal Runaway)
• Low power consumption (50mA)
• CAN 500kbps High Speed communication
• Standard automotive 4 pins connector
• Watertight housing IP6K7

About SGX Sensortech
For more than 50 years, SGX Sensortech, has remained at the forefront of air quality sensors and modules. Our innovative products have helped protected the occupants of cars from deteriorating air quality whilst driving through polluted cities, reduced the cost of air conditioning in buildings and made the work environment a safer place from flammable and toxic gas hazards. SGX Sensortech delivers high quality products, underpinned by excellent application support and customer service. Please note that all parts are shipped from the United States.
About Component Distributors, Inc. (CDI)

Component Distributors, Inc. (CDI) is a value-added distributor of high-performance LED, Power, RF & Microwave, Wireless and Sensor component technologies. CDI distributes globally and provides local application support and customer service across the Americas. CDI delivers cutting edge power electronics by wrapping application support, development tools and design services around high-performance products from industry leading manufacturers.

Component Distributors, Inc. (CDI)
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