Battery module, battery rack, and power storage device
A battery module includes a plurality of cell assemblies including a plurality of secondary batteries; a module housing including an accommodation space configured to accommodate the plurality of cell assemblies; and a blocking member configured to, when a gas pressure more than a predetermined gas pressure or a heat more than a predetermined temperature is generated in at least some cell assemblies among the plurality of cell assemblies, block the generated gas or heat from moving to the other cell assemblies.
1. A battery module comprising: a plurality of cell assemblies; a module housing comprising an accommodation space configured to accommodate the plurality of cell assemblies a partition wall portion positioned between the plurality of cell assemblies and having an opening; and an opening and closing portion configured to move linearly so as to block at least a part of the opening, wherein the opening and closing portion comprises: an extension structure located in the opening and extending in a first to be movable in the first direction; and a stopper structure formed on each end of the extension structure and configured to block at least a part of the opening when moving in the first direction.
2. The battery module of claim 1 , wherein the module housing comprises a refrigerant passage configured to make a refrigerant introduced from an outside move in the accommodation space, and
wherein the partition wall portion is positioned in the refrigerant passage.
3. The battery module of claim 1 , wherein at least a part of an edge of the stopper structure is bent in the first direction.
4. The battery module of claim 1 , wherein a first part of the partition wall portion is interposed between the plurality of cell assemblies, and at least a part of a second part protrudes beyond the plurality of cell assemblies.
5. The battery module of claim 1 , wherein a part of an outer wall of the module housing comprises a vent configured to be opened by melting when an internal temperature rises to more than a second predetermined temperature.
6. The battery module of claim 5 , wherein the vent comprises a heat transfer fin configured to heat the vent.
7. A battery rack comprising at least one battery module according to claim 1 and a rack case accommodating the battery module.
8. An energy storage device comprising at least two battery racks according to claim 7 .
9. The battery module of claim 1 , wherein the opening and closing portion has a central portion and a stopper structure at opposite ends of the central portion.