Disclosed is an energy storage system (ESS) battery pack case, which includes a case body having at least two plates assembled to each other by fitting so as to be connected to each other along a circumferential direction thereof to form a hollow therein, the case body having an open top end and an
Disclosed is an energy storage system (ESS) battery pack case, which includes a case body having at least two plates assembled to each other by fitting so as to be connected to each other along a circumferential direction thereof to form a hollow therein, the case body having an open top end and an open bottom end; and an upper cover assembly configured to cover the top end of the case body and a lower cover assembly configured to cover the bottom end of the case body.
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1. An energy storage system (ESS) battery pack case, which has an inner space formed to accommodate a battery module and electric component, the ESS battery pack case comprising: a case body having at least two plates assembled to each other by fitting so as to be connected to each other along a cir
1. An energy storage system (ESS) battery pack case, which has an inner space formed to accommodate a battery module and electric component, the ESS battery pack case comprising: a case body having at least two plates assembled to each other by fitting so as to be connected to each other along a circumferential direction thereof to form a hollow therein, the case body having an open top end and an open bottom end; andan upper cover assembly configured to cover the top end of the case body and a lower cover assembly configured to cover the bottom end of the case body,wherein the case body includes a front plate which forms a front surface and both side surfaces of the case body, and a rear plate which is coupled to the front plate by the fitting and forms a rear surface of the case body. 2. The ESS battery pack case according to claim 1, wherein an adhesive sealing material is further interposed at every assembling portion of the at least two plates. 3. The ESS battery pack case according to claim 1, wherein an insert groove is prepared at any one of an end of any one plate among the plates and an end of another plate adjacent to the any one plate, and an insert protrusion coupled to the insert groove by the fitting is prepared at the another plate. 4. The ESS battery pack case according to claim 1, wherein the at least two plates are prepared into a predetermined form by means of extrusion molding. 5. The ESS battery pack case according to claim 1, wherein a drainage hole is formed in the lower case assembly to pass therethrough in a vertical direction. 6. The ESS battery pack case according to claim 1, wherein bolt-coupling blocks are provided in the case body to protrude inwards at predetermined locations, andwherein the upper and lower cover assemblies have bolt-coupling holes formed to correspond the bolt-coupling blocks in one-to-one relationship so that bolts are respectively coupled and fixed to the top end and the bottom end of the case body. 7. The ESS battery pack case according to claim 1, wherein the upper cover assembly and the lower cover assembly respectively include a cover body configured to cover the top end or the bottom end of the case body and a strength-reinforcing plate made of metal and assembled to an inner region of a rim of the cover body. 8. The ESS battery pack case according to claim 1, wherein the front plate includes a front left plate which forms a part of the front surface and the left surface of the case body, and a front right plate which is coupled to the front left plate by fitting and forms the remaining part of the front surface and the right surface of the case body. 9. The ESS battery pack case according to claim 8, wherein the front right plate includes a front right upper plate and a front right lower plate which are assembled up and down so that a display panel for displaying a state of charge of the battery module to the outside is interposed therebetween. 10. The ESS battery pack case according to claim 9, wherein bolts are further coupled to assembling portions where the front left plate and the front right upper plate are respectively connected to the rear plate, and a latch is coupled to an assembling portion where the front right lower plate is connected to the rear plate. 11. The ESS battery pack case according to claim 9, wherein the rear plate includes a rear left plate which forms a part of the rear surface of the case body, and a rear right plate which is coupled to the rear left plate by fitting and forms the remaining part of the rear surface of the case body. 12. An energy storage system (ESS) battery pack case, which has an inner space formed to accommodate a battery module and electric component, the ESS battery pack case comprising: a case body having at least two plates assembled to each other by fitting so as to be connected to each other along a circumferential direction thereof to form a hollow therein, the case body having an open top end and an open bottom end; andan upper cover assembly configured to cover the top end of the case body and a lower cover assembly configured to cover the bottom end of the case body,wherein an insert groove is prepared at any one of an end of any one plate among the plates and an end of another plate adjacent to the any one plate, and an insert protrusion coupled to the insert groove by the fitting is prepared at the another plate. 13. An energy storage system (ESS) battery pack case, which has an inner space formed to accommodate a battery module and electric component, the ESS battery pack case comprising: a case body having at least two plates assembled to each other by fitting so as to be connected to each other along a circumferential direction thereof to form a hollow therein, the case body having an open top end and an open bottom end; andan upper cover assembly configured to cover the top end of the case body and a lower cover assembly configured to cover the bottom end of the case body,wherein the upper cover assembly and the lower cover assembly respectively include a cover body configured to cover the top end or the bottom end of the case body and a strength-reinforcing plate made of metal and assembled to an inner region of a rim of the cover body. 14. The ESS battery pack case according to claim 12, wherein the insert groove and the insert protrusion are respectively formed successively along a vertical edge of the plates. 15. The ESS battery pack case according to claim 13, wherein the strength-reinforcing plate has a pair of vertical plates disposed with an interval corresponding to a width of the case body to be stand vertically with respect to the cover body, andwherein the case body has a vertical plate insert portion therein, formed at an inner side of the plates which are opposite to each other in a width direction of the case body, so that the pair of vertical plates are vertically coupled to the vertical plate insert portion by fitting. 16. The ESS battery pack case according to claim 15, wherein the vertical plate insert portion is provided in a pair so that two vertical plate insert portions are disposed to be spaced from each other, and each vertical plate insert portion is formed to protrude and bend from an inner side of the case body into a “T” shape.
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