ESSA battery pack having a structure in which cooling water can be introduced into the battery module when a thermal runaway occurs and Energy storage system comprising the same

摘要

A battery pack according to an embodiment of the present invention includes a pack housing; a plurality of battery modules stacked in the pack housing; a water tank connected to the plurality of battery modules and storing coolant; A main pipe connected to the water tank, a plurality of supply pipes connecting between the main pipe and each battery module, and a supply located at the uppermost point and the lowest point among the plurality of supply pipes, the supply pipe located at the uppermost part a coolant pipe including a bypass pipe connected to the main pipe at a point lower than the pipe; at least one sensor installed in the pack housing to detect a thermal runaway phenomenon occurring in at least some of a plurality of battery modules; and a controller outputting a control signal for allowing coolant to flow into the battery module through the coolant pipe when a thermal runaway phenomenon is detected by the sensor. includes