Early warning analysis of the thermal runaway process of full-size prefabricated cabin storage tank

doi:10.19799/j.cnki.2095-4239.2022.0280

Abstract

Abstract:

Various issues associated with the application of electrochemical energy storage include thermal runaway, fire, and explosion. Therefore, the safety application of electrochemical energy storage has attracted significant attention, and experimental studies on the thermal runaway of prefabricated cabin energy-storage cabinets are being conducted. This study analyzes the tendency of the voltage, temperature, oxygen concentration, carbon monoxide concentration, and other parameters for the electrochemical energy storage system under the heat abuse trigger, and some useful conclusions have been drawn. Further, the thermal runaway process and its early warning have been discussed systematically. The experimental results show that the cell temperature increases rapidly, reaching a maximum temperature up to 1000 ℃, and the change in voltage values and its early characteristics occur earlier than that of temperature under the heat abuse, indicating that the cell voltage is an obvious signal for the thermal runaway warning process. The temperature changes in the electric battery module show that the liquid cooling system's partition effectively delays the temperature change within the electric module box, ensuring the battery system's safety while thermal control occurs below the electric module box. Based on the analysis of the generating gas of the thermal runaway process, changes in CO concentration in the electric battery module and cabinet can provide basic data for the setting and application of a gas alarm detector. The anticipated peak value of the heat release rate based on oxygen concentration is high, while total heat is low, allowing for early detection and control of the energy storage system fire. Multi-information fusion detection and early warning technology should be developed for the complex characteristics of the electrochemical energy storage system thermal runaway process, which is meaningful and valuable.

Key words: prefabricated cabin type storage tank, thermal runaway, early waring, fire gas concentration, full-scale experiment

CLC Number:

TQ 028.8

Lei XU, Xiaopeng LIU, Yongyu WANG. Early warning analysis of the thermal runaway process of full-size prefabricated cabin storage tank[J]. Energy Storage Science and Technology, 2022, 11(8): 2463-2470.

Figures/Tables 7

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