Detection of failure modes and protection solutions for Li-Ion energy packs by means of gas sensors

摘要

1. gas sensors are capable of increasing safety in large lithium-ion battery systems 2. costs are relatively small 3. gas venting from a cell under abuse is detected 4. electrolyte leaks are easily detected 5. user can be warned and an emergency shutdown performed to prevent further damage 6. gas sensors might detect a rise in VOC concentration even before a bloated cell fully opens 7. automated shutdown may prevent cell venting 8. the absolute value of the sensor resistance is not always indicative and change in the resistance value should be taken into account. 9. Not calibrated signal. Measures delta; changes in resistance.