THERMAL RUNAWAY DETECTING DEVICE, BATTERY SYSTEM, AND THERMAL RUNAWAY DETECTING METHOD OF BATTERY SYSTEM

The present invention relates to a thermal runaway detecting device, a battery system, and a thermal runaway detecting method of the battery system, and the thermal runaway detecting device may include: a first measuring module for measuring temperature values of the plurality of cells via at least one temperature sensor; a second measuring module for measuring an output voltage value of the battery system; and a controller for determining validity of thermal runaway detection based on the temperature value by monitoring data received from the first measuring module, and detecting a thermal runaway of the battery system by selectively monitoring the temperature value or the output voltage value according to a validity determining result of the thermal runaway detection based on the temperature value.