Battery cell carrying box
The present invention relates to a battery cell carrying box in which battery cells are housed and which has a flame discharge port to discharge a flame when a certain battery cell housed in the carrying box burns, such that it is possible to prevent the flame from being propagated to adjacent battery cells and prevent the flame from being propagated to adjacent carrying boxes.
1. A battery cell carrying box comprising:
a container-type case in which a concave housing space is formed to house battery cells therein; and
a cover coupled to the case and covering an opening of the case,
wherein a flame discharge port is formed in a side wall of the case, the flame discharge port penetrating through an inner portion and an outer portion of the side wall that is positioned on a side perpendicular to a direction in which the battery cells housed in the case are stacked,
wherein in the case and the cover, fire extinguishing members that discharge a fire extinguishing medium at a specific temperature or higher are coated on inner side wall surfaces that form the housing space,
wherein a specific pattern having a concave portion and a convex portion is formed on a surface of each of the case and the cover on which the fire extinguishing member is coated, and the concave portion of the specific pattern is filled with the fire extinguishing member, and
wherein the fire extinguishing member is coated to cover the convex portion of the specific pattern.
2. The battery cell carrying box of claim 1 , wherein the case has a bottom wall and side walls extending upward along a circumference of the bottom wall, and
the flame discharge port is formed at a corner where the side walls meet each other.
3. The battery cell carrying box of claim 2 , wherein the flame discharge port is formed at a position adjacent to the bottom wall.
4. The battery cell carrying box of claim 2 , wherein a plurality of flame discharge ports are formed, and
the flame discharge ports are formed at positions opposite to each other with respect to a central portion surrounded by the side walls.
5. The battery cell carrying box of claim 1 , wherein in the case and the cover, heat insulation members formed of a heat insulation material that blocks heat transfer are formed on inner side wall surfaces that form the housing space, or between the inner side wall surfaces and outer side wall surfaces.
6. The battery cell carrying box of claim 5 , wherein the heat insulation member is formed of mica or glass fiber.
7. The battery cell carrying box of claim 1 , wherein in the case and the cover, heat insulation members formed of a heat insulation material that blocks heat transfer are formed on inner side wall surfaces that form the housing space, and fire extinguishing members that discharge a fire extinguishing medium at a specific temperature or higher are coated on inner side wall surfaces of the heat insulation members.
8. The battery cell carrying box of claim 1 , wherein in the case and the cover, heat insulation members formed of a heat insulation material that blocks heat transfer are formed between inner side wall surfaces that form the housing space and outer side wall surfaces, and fire extinguishing members that discharge a fire extinguishing medium at a specific temperature or higher are coated on the inner side wall surfaces of the case and the cover that form the housing space.