Abstract: A battery container has improved energy density and can be used in an energy storage system. The battery container includes a container body, a coupling unit configured to couple different container bodies, and a load support unit configured to support a vertical load of the container body.

Abstract: An energy storage system according to the present disclosure includes at least one battery rack including a plurality of stacked battery modules; a container accommodating the at least one battery rack, wherein the container includes a bottom plate in which the at least one battery rack is disposed; and a fire fighting water collection chamber disposed lower than the bottom plate and having at least one side in communication with the bottom plate to allow a fire fighting water dropped from the at least one battery rack to enter.

Abstract: A battery rack according to the present disclosure includes a plurality of battery modules; a rack case having receiving portions, each receiving portion configured to and receive one of the plurality of battery modules at each predetermined height, and each receiving portion having a structure in which upper and lower sides and left and right sides are closed and front and rear sides are open; a fire fighting water supply pipe connected to each of the battery modules disposed in the receiving portions which supplies a fire fighting water when a fire occurs; and a drain guide disposed on an outer surface of the rack case including at least one surface of a front outer surface or a rear outer surface of the rack case, the drain guide being configured to guide drainage of the fire fighting water.

Abstract: Disclosed is a multilayer-type patch antenna including: an upper patch antenna portion having a first through hole and a second through hole which are at a predetermined angle; a lower patch antenna portion having a third through hole and a fourth through hole which are at a predetermined angle, and a fifth through hole which is spaced from the third through hole and the fourth through hole; a first feeding pin which passes through the first through hole and the third through hole and protrudes from a lower end of the lower patch antenna portion; a second feeding pin which passes through the second through hole and the fourth through hole and protrudes from the lower end of the lower patch antenna portion; and a third feeding pin which passes through the fifth through hole and protrudes from the lower end of the lower patch antenna portion.

Abstract: Disclosed is a multilayer-type patch antenna including: an upper patch antenna portion having a first through hole and a second through hole which are at a predetermined angle; a lower patch antenna portion having a third through hole and a fourth through hole which are at a predetermined angle, and a fifth through hole which is spaced from the third through hole and the fourth through hole; a first feeding pin which passes through the first through hole and the third through hole and protrudes from a lower end of the lower patch antenna portion; a second feeding pin which passes through the second through hole and the fourth through hole and protrudes from the lower end of the lower patch antenna portion; and a third feeding pin which passes through the fifth through hole and protrudes from the lower end of the lower patch antenna portion.