AI Article Synopsis

  • An experimental setup and standard operating procedure (SOP) are created to gather detailed data on gas emissions and fire behavior during the thermal runaway of lithium-ion battery cells.
  • The experiments involve conditioning a 18650 cylindrical cell to various states-of-charge, then inducing thermal runaway with a controlled heating method while measuring gas concentrations and observing key events using camcorders.
  • The collected data helps analyze the cell's characteristics, such as gas compositions and mass loss, which can aid in developing models for understanding lithium-ion battery fires and could be adapted for different cell types.

Article Abstract

An experimental apparatus and a standard operating procedure (SOP) are developed to collect time-resolved data on the gas compositions and fire characteristics during and post-thermal runaway of lithium-ion battery (LIB) cells. A 18650 cylindrical cell is conditioned to a desired state-of-charge (SOC; 30%, 50%, 75%, and 100%) before each experiment. The conditioned cell is forced into a thermal runaway by an electrical heating tape at a constant heating rate (10 °C/min) in an environmental chamber (volume: ~600 L). The chamber is connected to a Fourier transform infrared (FTIR) gas analyzer for real-time concentration measurements. Two camcorders are used to record major events, such as cell venting, thermal runaway, and the subsequent burning process. The conditions of the cell, such as surface temperature, mass loss, and voltage, are also recorded. With the data obtained, cell pseudo-properties, venting gas compositions, and venting mass rate can be deduced as functions of cell temperature and cell SOC. While the test procedure is developed for a single cylindrical cell, it can be readily extended to test different cell formats and study fire propagation between multiple cells. The collected experimental data can also be used for the development of numerical models for LIB fires.

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Source
http://dx.doi.org/10.3791/65051DOI Listing

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