Battery module including structure for heat exchange and fire prevention
A battery module including a case having an accommodation space accommodating a battery; and a cooling and fire extinguishing module disposed on the case and configured to cool heat generated in the accommodation space and extinguish a fire occurring in the accommodation space, is provided. The cooling and fire extinguishing module includes a first space, through which a refrigerant moves, or in which the refrigerant is accommodated, and a second space which is separated from the first space and formed more adjacent to the accommodation space than the first space, and stores an extinguishing fluid.
1 . A battery module comprising:
a case having an accommodation space accommodating a battery; and
a cooling and fire extinguishing module disposed on the case and configured to cool heat generated in the accommodation space and extinguish a fire occurring in the accommodation space,
wherein the cooling and fire extinguishing module comprises a first space through which a refrigerant moves, or in which the refrigerant is accommodated; and
a second space which is separate from the first space and stores an extinguishing fluid,
wherein the first space, the second space, and the accommodation space are arranged one on top of another with the second space more adjacent to the accommodation space than the first space.
2 . The battery module of claim 1 , wherein the cooling and fire extinguishing module comprises:
a body including the first space and the second space, and coupled to the case; and
a separating plate disposed to cross the body and to separate an inner space of the body into the first space and the second space.
3 . The battery module of claim 1 , wherein the cooling and fire extinguishing module comprises:
a first plate coupled to the case so as to cover the accommodation space and forming a lower body;
a separating plate having a portion coupled to the first plate and separating the first space and the second space from each other; and
a second plate having a portion coupled to the separating plate and forming an upper body.
4 . The battery module of claim 3 , wherein the first plate and the separating plate form the second space, and
the separating plate and the second plate form the first space.
5 . The battery module of claim 1 , wherein the cooling and fire extinguishing module comprises:
at least one connection hole through which the second space and the accommodation space are spatially connected to each other; and
a sealing member sealing the connection hole, wherein the sealing member is melted at a predetermined temperature or higher such that the sealing of the connection hole is released.
6 . The battery module of claim 5 , wherein the sealing member is melted at the predetermined temperature or higher such that the extinguishing fluid is ejected into the accommodation space.
7 . The battery module of claim 1 , wherein the cooling and fire extinguishing module receives the heat through at least one heat dissipating pad disposed in contact with the cooling and fire extinguishing module.
8 . The battery module of claim 1 , wherein the cooling and fire extinguishing module comprises a separating plate separating the first space and the second space from each other,
wherein a plurality of pin-shaped protrusions protruding toward the first space and the second space, respectively, are formed on the separating plate.
9 . The battery module of claim 1 , wherein the extinguishing fluid has a higher insulating property than the refrigerant.
10 . The battery module of claim 1 , wherein the extinguishing fluid has a lower boiling point than the refrigerant and transfers the heat through a phase change.
11 . The battery module of claim 1 , wherein the extinguishing fluid transfers heat generated in the battery to the first space through the phase change.
12 . The battery module of claim 1 , wherein at least a portion of the second space is inside the accommodation space.
13 . The battery module of claim 1 , wherein the first space is outside the accommodation space.