Accordingly, the main housing H and the second plate P2 including the same kind of resin material with each other may be firmly coupled to each other by using the sealing portion 50 arranged therebetween and including the same kind of resin material therewith. However, the technical scope of embodiments according to the present disclosure is not limited thereto. For example, the main housing H and the second plate P2 may include a flame retarding material, and the sealing portion 50 may not include a flame retarding material. Unlike the main housing H and the second plate P2, the sealing portion 50 may have a relatively small volume, and thus, even when the sealing portion 50 does not include a flame retarding material, problems may not be caused in an emergency situation, such as ignition, explosion, etc. Also, as described below, the sealing portion 50 may be formed in a location directly contacting the outside to require an additional sealing property, and thus, may include a material different from materials of the main housing H or the second plate P2.
The module housing 5 according to some embodiments may be formed via die sliding injection (DSI). For example, the main housing H and the first plate P1 including different kind of materials from each other may be integrally formed with each other via primary molding adopting insert molding, and then, the sealing portion 50 for coupling a primary molding structure, in which the main housing H and the first plate P1 are integrally formed with each other, with the second plate P2 may be formed via secondary molding.