Battery enclosure and energy storage system including same

Abstract

A battery enclosure according to an embodiment of the present invention comprises: an enclosure including a base fixed to an installation plane; and a battery rack fixed to the base and accommodating at least one battery. The battery rack includes at least one column extending vertically. The base includes two horizontal beams and two vertical beams. The horizontal beams each include a fixing part for fixing the battery enclosure to the installation plane. The position of the fixing part corresponds to the position of the column included in the battery rack.

Description

Battery enclosure and energy storage system including same

[0001] Cross-citation with related application(s)

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2023-0172422, filed December 1, 2023, and Korean Patent Application No. 10-2024-0161894, filed November 14, 2024, the entire contents of which are incorporated herein by reference.

[0003] The present invention relates to a battery case and an energy storage system including the same.

[0004] Recently, with issues like power shortages and eco-friendly energy emerging, Energy Storage Systems (ESS) for storing generated power have been attracting significant attention. For example, utilizing ESS facilitates the establishment of power management systems, such as smart grid systems, allowing for easier power supply and demand adjustments in specific regions and cities. Furthermore, with the commercialization of electric vehicles in full swing, ESS can be applied to electric charging stations.

[0005] ESS can take various forms, but typically comprises one or more enclosures. The enclosures house multiple battery modules or battery packs (hereinafter referred to as "batteries"), which may be connected in series and / or parallel.

[0006] For example, prior art document 1 (Korean Patent Publication No. KR 10-2023-0112086) discloses an ESS including two or more enclosures.

[0007] The problem to be solved by the present invention is to provide a battery case having a compact structure and an energy storage system including the same by achieving optimization of internal space.

[0008] In addition, another problem to be solved by the present invention is to provide a battery case and an energy storage system including the same that guarantees earthquake-resistant performance while having a simple installation process.

[0009] However, the problems to be solved by the embodiments of the present invention are not limited to the problems described above and can be expanded in various ways within the scope of the technical ideas included in the present invention.

[0010] A battery enclosure according to one embodiment of the present invention comprises an enclosure including a base fixed to an installation surface, and a battery rack fixed to the base and accommodating at least one battery, wherein the battery rack includes at least one column extending vertically, the base includes at least one horizontal beam and at least one vertical beam, and the horizontal beam includes a fixing portion for fixing the battery enclosure to the installation surface, wherein a position of the fixing portion corresponds to a position of the column included in the battery rack.

[0011] There may be one fixed member formed on the above horizontal beam.

[0012] The fixed portion formed on the horizontal beam may be positioned apart from the center in the longitudinal direction of the horizontal beam.

[0013] In addition to the middle fixing part formed on the horizontal beam, the above-mentioned fixing part may further include a corner fixing part positioned adjacent to an end of the horizontal beam or an end of the vertical beam.

[0014] There are a plurality of corner fixing parts, and the middle fixing part can be located between two of the corner fixing parts.

[0015] The above middle fixing member may be positioned closer to one of the two corner fixing members than to the other.

[0016] The above battery rack may include a plurality of rows in which the batteries are vertically stacked.

[0017] The above middle fixing member may include a lower surface having a hole formed thereon and a support surface extending from an edge of the lower surface to the horizontal beam.

[0018] The corner fixing member includes a lower surface having a hole formed therein, and one edge of the lower surface can be positioned adjacent to the horizontal beam or the vertical beam.

[0019] The base includes a rack-mounted beam positioned between two of the horizontal beams, and the column can be fixed to the rack-mounted beam.

[0020] A sub-vertical beam is positioned below the above rack-fixed beam, and the sub-vertical beam can be arranged perpendicular to the horizontal beam.

[0021] The above horizontal beam may include a bulkhead formed therein.

[0022] The base further includes a sub-vertical beam arranged perpendicular to the horizontal beam, and both ends of the sub-vertical beam can be in contact with the bulkhead of the horizontal beam.

[0023] The above battery case further includes a control panel for managing the battery rack, and the front part of the control panel can be arranged to be perpendicular to the front part of the battery rack.

[0024] The battery case further includes an air conditioner for heat dissipation of the at least one battery, and the air conditioner may be provided in a state coupled to a door installed at the front of the battery rack so as to enable access to the battery rack.

[0025] The above battery case may be provided with a cable installed therein as a conductive member for electrical connection.

[0026] An energy storage system according to another embodiment of the present invention includes at least one battery case as described above.

[0027] According to embodiments, by changing the layout of the internal configuration, dead space can be minimized, thereby improving the space efficiency of the battery enclosure and the energy storage system including the same.

[0028] In addition, according to embodiments, the ease of installation can be improved and the installation work can be simplified and streamlined by changing the power distribution structure for providing power to the battery case and minimizing the number of anchors for fixing the battery case to the installation location.

[0029] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0030] FIG. 1 is a schematic block diagram of an energy storage system according to one embodiment of the present invention.

[0031] Figure 2 is a perspective view of a battery case according to one embodiment of the present invention.

[0032] FIG. 3 is a side view of a battery case according to one embodiment of the present invention.

[0033] FIG. 4 is another side view of a battery case according to one embodiment of the present invention.

[0034] Figure 5 is a front view of a battery case according to one embodiment of the present invention.

[0035] Fig. 6 is a front view of the battery case according to Fig. 2 with some components omitted.

[0036] Fig. 7 is a perspective view of an air conditioner included in a battery case according to Fig. 2.

[0037] Figure 8 is a cross-sectional view taken along line AA of Figure 2.

[0038] FIG. 9 is a perspective view of the base of the case included in the battery case according to FIG. 2.

[0039] Fig. 10 is a BB cross-sectional view of Fig. 9.

[0040] Figure 11 is an enlarged view of part C1 of Figure 9.

[0041] Figure 12 is an enlarged view of part C2 of Figure 9.

[0042] Fig. 13 is a perspective view of a battery rack included in a battery case according to Fig. 2.

[0043] Fig. 14 is a drawing for explaining the position of the fixing part in the battery case according to Fig. 2.

[0044] Fig. 15 is a drawing for explaining the arrangement of a plurality of battery cases according to Fig. 2.

[0045] Fig. 16 is a drawing showing a modified example of a base included in a battery case according to Fig. 2.

[0046] FIGS. 17 to 19 are drawings for explaining the electrical connection structure inside a battery case according to one embodiment of the present invention.

[0047] FIG. 20 is a drawing for explaining an electrical connection structure of an energy storage system according to one embodiment of the present invention.

[0048] Fig. 21 is an enlarged view of one side of the case included in the battery case according to Fig. 2.

[0049] Figures 22 and 23 are exploded perspective views of a closing unit that closes the opening of the battery case according to Figure 2.

[0050] Fig. 24 is a modified example of the closure unit according to Fig. 23.

[0051] FIG. 25 is a drawing comparing the connection between battery cases according to one embodiment of the present invention with the prior art.

[0052] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be implemented in various different forms other than those described below, and the scope of the present invention is not limited by the embodiments described herein.

[0053] In order to clearly explain the present invention, parts that are not related to the description are omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0054] In addition, the size and thickness of each component shown in the drawings are arbitrarily enlarged or reduced for convenience of explanation, so it is obvious that the content of the present invention is not limited to what is shown. In the drawings below, the thickness of each layer is enlarged to clearly express various layers and regions. In addition, in the drawings below, the thickness of some layers and regions is exaggerated for convenience of explanation.

[0055] Also, when a part such as a layer, membrane, region, or plate is described as being "over" or "on" another part, this should be interpreted to include not only cases where the layer, membrane, region, or plate is "directly over" the other part, but also cases where there are other parts in between. Conversely, when a part such as a layer, membrane, region, or plate is described as being "directly over" another part, this can mean that there are no other parts in between. Furthermore, being "over" or "on" a reference part means being located above or below the reference part, and may not necessarily mean being located "over" or "on" the opposite direction of gravity. Meanwhile, just as describing being "over" or "on" another part, describing being "under" or "beneath" another part can also be understood with reference to the above.

[0056] Additionally, throughout the specification, whenever a part is said to "include" a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise specifically stated.

[0057] Additionally, throughout the specification, when we say "in plan", we mean when the part is viewed from above, and when we say "in cross section", we mean when the part is viewed from the side in a cross-section cut vertically.

[0058] Battery packs located within the enclosure of an Energy Storage System (ESS) are mounted on a rack frame or similar device. Therefore, if the enclosure or rack frame moves due to external shock or vibration, the battery packs may detach from the rack frame or be damaged. Therefore, the enclosure must be stably fixed to the installation site, which often leads to an increase in the number of anchors used to secure the enclosure to the ground. However, if the number of anchors is unnecessarily increased to secure the enclosure to the ground, the complexity of the installation process and the installation time increase.

[0059] Additionally, an ESS may include two or more enclosures, which may be electrically interconnected to supply power. However, the distribution structure connecting the two enclosures must be formed after the enclosures are permanently installed, making it difficult for the ESS provider (seller) to control installation errors.

[0060] In addition, ESS mainly uses standard enclosures of 20 feet or 40 feet, but since the sizes of batteries and rack frames from various manufacturers vary, there was a problem that these structures could not be efficiently stored inside the standard enclosure.

[0061] Below, an energy storage system according to one embodiment of the present invention is described.

[0062] FIG. 1 is a schematic block diagram of an energy storage system according to one embodiment of the present invention.

[0063] Referring to FIG. 1, an energy storage system (1) according to the present embodiment may include a battery case (1000), a battery rack (2000) including a plurality of batteries (5000), a control panel (3000) for managing electrical devices inside the battery case (1000), and a control cabinet (4000) for managing the status of the battery case (1000) and overseeing the operation of the energy storage system (1). The ESS (1) of the present embodiment includes two battery cases (1000), each battery case (1000) includes two battery racks (2000), each battery rack (2000) includes two sub-racks (2001), and each sub-rack (2001) includes four batteries (5000), but is not limited to these numbers, and the numbers of battery cases (1000), battery racks (2000), sub-racks (2001), and batteries (5000) can be arbitrarily adjusted as needed.

[0064] The control cabinet (4000) may be configured to supervise the overall operation of the energy storage system (1). Through the control cabinet (4000), the energy storage system (1) may be connected to an external device. For example, the control cabinet (4000) may be connected to an external power conversion system (PCS). By connecting the control cabinet (4000) and the PCS, the energy storage system (1) may receive charging power from the PCS and transmit discharging power to the PCS. Here, the PCS may also be described as being included in the energy storage system (1).

[0065] The control cabinet (4000) can be electrically connected to at least one battery enclosure (1000). The battery enclosure (1000) can receive charging power from the control cabinet (4000) and transmit discharging power to the control cabinet (4000).

[0066] The control cabinet (4000) may include a control unit for controlling the operation of the energy storage system (1). The control unit may process information received from the BMS of the battery enclosure (1000) and instruct the battery enclosure (1000) to perform operations based on the information. The control unit may transmit electrical signals to the BMS located outside the control cabinet (4000) and receive electrical signals from the BMS through a communication unit provided in the control cabinet (4000). Here, the BMS may include a rack BMS electrically connected to a plurality of batteries (5000) included in a battery rack (2000) and / or a battery BMS provided in each battery (5000). As will be described later, the rack BMS may be connected to a control unit (5100; see FIG. 20) included in the battery rack (2000).

[0067] The control cabinet (4000) may be configured to be physically separate from the battery enclosure (1000). In this case, the control cabinet (4000) includes a separate housing, for example, in the form of an enclosure, and the control unit described above may be located within the housing, such as the enclosure, thereby being protected from the external environment.

[0068] The battery enclosure (1000) may include a plurality of battery racks (2000). The battery rack (2000) may include a plurality of sub-racks (2001), and a plurality of batteries (5000) may be vertically stacked on each sub-rack (2001). Here, the batteries (5000) positioned on each sub-rack (2001) may be described as forming a column. For example, if the battery rack (2000) includes three sub-racks (2001), the battery rack (2000) may be described as including batteries (5000) arranged in three rows.

[0069] The battery enclosure (1000) may include a control panel (3000) for managing electrical devices therein. The control panel (3000) may be electrically connected to each battery rack (2000) within the battery enclosure (1000). The control panel (3000) may be electrically connected to each sub-rack (2001) included in the battery rack (2000). The control panel (3000) may be electrically connected to a control cabinet (4000) located outside the battery enclosure (1000). Power transmitted from the control cabinet (4000) to the battery enclosure (1000) may be transmitted to the battery rack (2000) via the control panel (3000).

[0070] The control panel (3000) may be involved in the charging / discharging and other operations of the battery rack (2000). Here, 'involvement' may include not only the operation of the battery rack (2000) being controlled through the judgment of the control panel (3000), but also the operation of the battery rack (2000) being controlled based on the control panel (3000) receiving a request from the control cabinet (4000).

[0071] In addition, 'involvement' can be interpreted broadly and may also include cases where the information processing process of the control panel (3000) is not involved in the operation control of the battery rack (2000). For example, in some embodiments, the control panel (3000) may simply be for integrating cables or bus bars extending from a plurality of battery racks (2000) into one. In this case, even if the electrical signal transmitted and received between the control cabinet (4000) and the battery rack (2000) is transmitted through the control panel (3000), the control panel (3000) may not involve any other information processing process other than transmitting the signal during the transmission process. In this way, in the present specification, the fact that the electrical signal of the control cabinet (4000) is transmitted to the battery rack (2000) through the control panel (3000) without a separate information processing process of the control panel (3000) can also be described as the control panel (3000) being involved in the operation of the battery rack (2000).

[0072]

[0073] Below, a battery case (1000) according to one embodiment of the present invention will be described.

[0074] FIG. 2 is a perspective view of a battery case (1000) according to an embodiment of the present invention. FIG. 3 is a side view of a battery case (1000) according to an embodiment of the present invention. FIG. 4 is another side view of a battery case (1000) according to an embodiment of the present invention. FIG. 5 is a front view of a battery case (1000) according to an embodiment of the present invention. FIG. 6 is a front view of the battery case (1000) according to FIG. 2 with some components omitted. FIG. 7 is a perspective view of an air conditioner included in the battery case (1000) according to FIG. 2. FIG. 8 is a cross-sectional view taken along line AA of FIG. 2.

[0075] Referring to FIGS. 2 to 8, the battery case (1000) of the present embodiment may include a case (1001) having an accommodation space inside, and a battery rack (2000) positioned in the accommodation space formed by the case (1001) for mounting a battery (5000).

[0076] A battery (5000) is an energy storage unit provided to a battery rack (2000), and may be a battery module or a battery pack. According to one embodiment, the battery (5000) may be located in a battery rack (2000) located in a receiving space within an outer case (1001).

[0077] The housing (1001) may have a rectangular parallelepiped shape including a lower surface, an upper surface, and side surfaces extending between the lower and upper surfaces. The side surfaces of the housing (1001) may be divided into a front surface, a rear surface, a left surface, and a right surface. The housing (1001) may be described as having a length, a depth, and a height.

[0078] Here, the length value (LT) of the outer case (1001) may be a size on the X-axis. The depth value (DT) of the outer case (1001) may be a size on the Y-axis. The height value (HT) of the outer case (1001) may be a size on the Z-axis. Here, the length value, depth value, and height value of the battery rack (2000) may also be described as sizes on the X-axis, Y-axis, and Z-axis, like the outer case (1001).

[0079] In addition, the two sides in the longitudinal direction (X-axis direction) of the outer case (1001) may be referred to as the left side (-X-axis direction) and the right side (+X-axis direction). The two sides in the depth direction of the outer case (1001) may be referred to as the front side (-Y-axis direction) and the rear side (+Y-axis direction). The two sides in the height direction of the outer case (1001) may be referred to as the upper side (+Z-axis direction) and the lower side (-Z-axis direction). Here, the left and right, front and back, and top and bottom of the battery rack (2000) may also be described in the same manner.

[0080] The outer case (1001) may include a base (1100) forming a lower portion, a main column (1190) positioned vertically upright with the base (1100) at a corner of the base (1100), and a loop (1192) vertically connected to the main column (1190) to form an upper portion of the outer case (1001).

[0081] A plate-shaped member may be positioned between the main columns (1190) of the outer case (1001), and the facing edges of the plate-shaped member may be fixed to the main columns (1190) to form the side surfaces of the outer case (1001). However, as described below, a door (1200) or other members may be provided on some of the side surfaces of the outer case (1001).

[0082] The housing (1001) may include a door (1200) for opening and closing the housing (1001). By opening at least one side of the housing (1001) through the door (1200), a worker may access the internal components of the housing (1001), thereby enabling maintenance of the battery housing (1000). In addition, by closing the door (1200), the interior of the housing (1001) may be sealed from the outside, thereby protecting the battery (5000) and the like inside from the external environment.

[0083] The door (1200) may be plural. The door (1200) may include a first door (1210) and a second door (1220). The first door (1210) may be located on one side of the housing (1001), and the second door (1220) may be located on the other side of the housing (1001).

[0084] A battery rack (2000) may be positioned at the rear side of the first door (1210) to allow workers access to the battery rack (2000). Since the housing (1001) is provided with the first door (1210), in the event of a malfunction or fire in the battery (5000), the problem with the battery housing (1000) can be quickly resolved by quickly separating or replacing the battery (5000) or the battery rack (2000).

[0085] Here, the number of first doors (1210) may be plural. Each first door (1210) may be for individually managing a battery rack (2000). Each first door (1210) may correspond to a respective battery rack (2000) located in the receiving space. However, depending on the design, the number of first doors (1210) may be greater or less than the number of battery racks (2000).

[0086] A control panel (3000) may be positioned on the rear side of the second door (1220) to allow the operator access to the control panel (3000).

[0087] By arranging one side of the enclosure (1001) where the first door (1210) is positioned and the other side of the enclosure (1001) where the second door (1220) is positioned to be perpendicular to each other, the first door (1210) and the second door (1220) can be positioned perpendicular to each other. For example, the first door (1210) can be positioned on the front of the enclosure (1001), and the second door (1220) can be positioned on one of the left and right sides of the enclosure (1001).

[0088] Meanwhile, conventionally, doors were provided on the front and rear of the case (1001) to facilitate installation and management of the battery (5000). However, since the case (1001) is mainly designed to have a large length value (LT), if a door is provided on the rear, the door is located over a relatively large area, which makes sealing and management of the case (1001) more difficult. In addition, if a door is provided on the rear, it is difficult for a worker to access, and if two cases (1001) are arranged with their rears facing each other, a separation space that allows for worker access is required, which may make efficient use of space difficult. However, in the case (1001) of the present embodiment, the above-described problem is minimized by providing a second door (1220) on the left or right side instead of the door located on the rear.

[0089] Referring to FIG. 6, in this embodiment, the internal storage space of the outer case (1001) may include a power storage space (1002) and a control space (1003).

[0090] The power storage space (1002) and the control space (1003) may be positioned side by side in the longitudinal direction (X-axis direction) of the enclosure (1001). The power storage space (1002) may be positioned on one side of the enclosure (1001) in the longitudinal direction (X-axis direction), and the control space (1003) may be positioned on the other side of the enclosure (1001) in the longitudinal direction (X-axis direction). For example, the power storage space (1002) may be positioned on the right or left side of the enclosure (1001), and the control space (1003) may be positioned on the left or right side of the enclosure (1001).

[0091] Here, the power storage space (1002) and the control space (1003) are described separately, but this description does not mean that the power storage space (1002) and the control space (1003) are mutually isolated. Therefore, a partition or the like may not be added between the power storage space (1002) and the control space (1003) to isolate them.

[0092] The power storage space (1002) may be a space that is opened and closed by the first door (1210). A battery rack (2000) including a battery (5000) may be located in the power storage space (1002).

[0093] The control space (1003) may be a space opened and closed by a second door (1220) that can be opened toward the left or right side of the enclosure (1001) as described above. By positioning a control panel (3000) in the control space (1003), an operator can access the control panel (3000) of the control space (1003) through the second door (1220). The control panel (3000) has a structure with a relatively small depth value, and by positioning the control panel (3000) toward the left or right side rather than the front, the dead space of the enclosure (1001) can be minimized. In addition, the length value (LT) of the enclosure (1001) can be minimized through this.

[0094] Meanwhile, the conventional control panel (3000) was mainly located in the center of the housing (1001). If the control panel (3000) were located in the center, the distance between the control panel (3000) and each battery rack (2000) could be shortened, but since the arrangement of the control panel (3000) was fixed to face the front, there was a problem in that the space was not used efficiently. However, in the present embodiment, the control panel (3000) is located in the control space (1003) provided on one side of the housing (1001), so that the arrangement of the control panel (3000) can be free, such as not having to face the front. Accordingly, the position of the control panel (3000) can be changed to face the left or right side of the housing (1001), and thereby the dead space in the internal space of the housing (1001) can be minimized. Here, the arrangement direction of the control panel (3000) can be described based on the direction in which the door of the control panel (3000) faces.

[0095] Referring to FIG. 4, the enclosure (1001) of the present embodiment may include an explosion-proof door (1230). The explosion-proof door (1230) may be configured to discharge gases generated due to internal thermal runaway to the outside. The explosion-proof door (1230) is normally kept closed, but may be opened when a thermal runaway phenomenon of the battery (5000) occurs, thereby allowing the inside and outside of the enclosure (1001) to be connected. There may be one explosion-proof door (1230), or there may be multiple explosion-proof doors. The explosion-proof door (1230) may be located on one side of the enclosure (1001) facing the second door (1220). However, the explosion-proof door (1230) may also be formed in a position different from that described above.

[0096] Referring to FIGS. 7 and 8, the housing (1001) may include an air conditioner (1300) for heat dissipation of the battery (5000). The air conditioner (1300) may be provided coupled to the door (1200). Accordingly, the space occupied by the air conditioner (1300) within the housing (1001) may be minimized.

[0097] In this embodiment, the first door (1210) may be positioned to correspond to each battery rack (2000). The air conditioner (1300) is provided in a state of being coupled to the first door (1210), so that the first door (1210) may correspond to each battery rack (2000). However, depending on the design, the number of first doors (1210) may be greater or less than the number of battery racks (2000), and accordingly, the range to which each air conditioner (1300) corresponds may be set differently from the above-described range.

[0098] The air conditioner (1300) of the present embodiment may be a combined form of an indoor unit for cooling the interior and an outdoor unit for discharging heat to the exterior. As illustrated in FIG. 5, the air conditioner (1300) includes an outdoor inlet (1310) and an outdoor outlet (1320) located on the exterior of the housing (1001), through which outside air can be introduced and inside air can be discharged. In addition, referring to FIGS. 7 and 8, the air conditioner (1300) may include an indoor inlet (1330) and an indoor outlet (1340) located on the interior of the housing (1001). The air discharged through the indoor outlet (1340) can move to the rear of the battery rack (2000), and the moved air can move again from the rear to the front of the battery rack (2000), thereby cooling the batteries mounted on the battery rack (2000).

[0099] Meanwhile, a guide (1350) may be positioned around the indoor exhaust port (1340) to guide the air flow. The air discharged from the indoor exhaust port (1340) through the guide (1350) may be concentrated toward the upper portion of the outer case (1001) and then moved to the rear of the battery rack (2000). Since it is difficult to form an air flow for cooling the battery (5000) when the air discharged from the air conditioner (1300) is dispersed over a wide space, the guide (1350) may be positioned to form an air flow within the outer case (1001).

[0100]

[0101] Below, the structure of the base (1100) of the battery case (1000) according to the present embodiment is described.

[0102] Fig. 9 is a perspective view of the base of the case included in the battery case according to Fig. 2. Fig. 11 is an enlarged view of section C1 of Fig. 9. Fig. 12 is an enlarged view of section C2 of Fig. 9.

[0103] Referring to FIGS. 9 to 12, the housing (1001) of the present embodiment may include a base (1100). The base (1100) may include two horizontal beams (1110) facing each other and two vertical beams (1120) facing each other.

[0104] Two horizontal beams (1110) and two vertical beams (1120) can form the outer shape of the base (1100). The horizontal beams (1110) and the vertical beams (1120) are arranged vertically, and one end of the horizontal beam (1110) and one end of the vertical beam (1120) are mutually coupled to form a rectangular shape. Here, a coupler (1140) can be provided to couple one end of the horizontal beam (1110) and one end of the vertical beam (1120). However, it is also possible for one end of the horizontal beam (1110) and one end of the vertical beam (1120) to be coupled in a form other than the coupler (1140).

[0105] The horizontal beam (1110) may be a structure extending along the longitudinal direction (X-axis direction) of the outer case (1001). The vertical beam (1120) may be a structure extending along the depth direction (Y-axis direction) of the outer case (1001). The length value of the horizontal beam (1110) may be greater than the length value of the vertical beam (1120).

[0106] Referring to FIG. 10, the horizontal beam (1110) may include a partition wall (1110a) therein, through which the rigidity of the horizontal beam (1110) may be further supplemented. Due to the partition wall (1110a), the axial cross-section shape of the horizontal beam (1110) may include an I-shape. The cross-section of the horizontal beam (1110) may have a shape in which at least one of the open sides in the I-shape is closed. Here, the axial cross-section may mean a cross-section cut perpendicular to the longitudinal axis of the horizontal beam (1110).

[0107] Meanwhile, depending on the design, the bulkhead may be located inside the vertical beam (1120) as well as the horizontal beam (1110).

[0108] A plate-shaped member (1150) may be positioned on the upper side of two horizontal beams (1110) and two vertical beams (1120). The plate-shaped member (1150) may form the upper surface of the base (1100). The plate-shaped member (1150) may be single, or may be provided in multiple numbers as shown in FIG. 9. A battery rack (2000) may be placed on the plate-shaped member (1150). A plurality of holes may be formed in the plate-shaped member (1150), and when the battery rack (2000) is positioned on the plate-shaped member (1150), a fixing member such as a bolt is inserted into the hole of the plate-shaped member (1150), thereby fixing the battery rack (2000) to the base (1100).

[0109] A sub-horizontal beam (1112) may be positioned between two horizontal beams (1110). The sub-horizontal beam (1112) may be positioned parallel to the horizontal beam (1110). A sub-vertical beam (1122) may be positioned between two vertical beams (1120). The sub-vertical beam (1122) may be positioned parallel to the vertical beam (1120). Since the sub-horizontal beam (1112) supports the plate-shaped member (1150) together with the horizontal beam (1110), the battery rack (2000) may be stably supported by the base (1100). In addition, since the sub-vertical beam (1122) extends between the two horizontal beams (1110) or the horizontal beam (1110) and the sub-horizontal beam (1112), the rigidity of the base (1100) structure may be supplemented.

[0110] Here, the sub-horizontal beam (1112) may be a structure extending vertically from the vertical beam (1120) between two vertical beams (1120). The sub-vertical beam (1122) may be a structure extending vertically from the horizontal beam (1110) between one of the two horizontal beams (1110) and the sub-horizontal beam (1112).

[0111] The end of the sub-vertical beam (1122) may be in contact with the bulkhead (1110a) of the horizontal beam (1110). By fixing the sub-vertical beam (1122) and the bulkhead (1110a), the structural stability of the base (1100) can be improved.

[0112] By arranging the horizontal beam (1110), the vertical beam (1120), the sub-horizontal beam (1112), and the sub-vertical beam (1122) parallel to or perpendicular to each other, a grid space can be formed between these beams (1110, 1120, 1112, 1122). An insulation material (1128) can be provided in the above-described grid space.

[0113] The sub-vertical beam (1122) may have a cross-section smaller than that of the vertical beam (1120), and the sub-vertical beam (1122) may be positioned relatively inside the base (1100) compared to the other beams (1110, 1120, 1112). Accordingly, a gap may be formed between the sub-vertical beam (1122) and the plate-shaped member (1150), and the rack-fixed beam (1130) may be positioned in this gap.

[0114] The rack fixing beam (1130) may be for stably fixing the base (1100) and the battery rack (2000). The rack fixing beam (1130) may be positioned at a joint location of the battery rack (2000) and the base (1100). The rack fixing beam (1130) may extend between two horizontal beams (1110) and parallel to the horizontal beam (1110). The rack fixing beam (1130) may be a structure extending between two vertical beams (1120) and perpendicular to the vertical beam (1120). The cross-section of the rack fixing beam (1130) may be smaller than the cross-section of the horizontal beam (1110). The rack fixing beam (1130) may be positioned above the sub-vertical beam (1122), through which the rack fixing beam (1130) may be supported by the sub-vertical beam (1122).

[0115] A hole may be formed in the rack fixing beam (1130), and the hole of the rack fixing beam (1130) may correspond to a hole of the plate-shaped member (1150). When the hole of the rack fixing beam (1130) and the hole of the plate-shaped member (1150) are positioned on the same axis, a fixing member penetrating the lower part of the battery rack (2000) is inserted into the hole described above, so that the battery rack (2000) and the base (1100) can be stably fixed.

[0116] Meanwhile, the base (1100) may include a fixing member (1160) for stable fixing of the installation surface and the outer case (1001). The fixing member (1160) includes a hole, and by inserting a fixing member such as a bolt or washer into the hole, the outer case (1001) can be fixed to the installation surface.

[0117] Referring to FIGS. 11 and 12, the fixing member (1160) may include a middle fixing member (1162) and a corner fixing member (1164).

[0118] As illustrated in FIG. 11, a middle fixing member (1162) may be formed on a horizontal beam (1110). The middle fixing member (1162) may include a lower surface having a hole formed thereon and a support surface extending between the lower surface and the horizontal beam (1110). The support surface may have a triangular shape and may have a shape extending perpendicularly to the lower surface from an edge of the lower surface and connected to the horizontal beam (1110).

[0119] The middle fixing member (1162) may be positioned between the two corner fixing members (1164), and may not necessarily be positioned at the center of the length of the horizontal beam (1110). For example, the middle fixing member (1162) may be positioned closer to one of the two corner fixing members (1164) than to the other. In the example of FIG. 9, the middle fixing member (1162) may be positioned closer to the corner fixing member (1164) located on the -Y axis than to the corner fixing member (1164) located on the +Y axis. This will be described in more detail with reference to FIGS. 13 and 14.

[0120] As illustrated in FIG. 12, a corner fastener (1164) may be positioned adjacent to a coupler (1140). The corner fastener (1164) may include one surface having a hole formed therein. One edge of the surface included in the corner fastener (1164) may be adjacent to the coupler (1140). Another edge perpendicular to the above-described edge of the surface included in the corner fastener (1164) may be adjacent to the vertical beam (1120). The corner fastener (1164) may be coupled to the vertical beam (1120) or the coupler (1140). In other words, the corner fastener (1164) may be formed at an end of the vertical beam (1120). Alternatively, the corner fastener (1164) may be formed on the coupler (1140).

[0121] Here, in FIG. 12, the corner fixing member (1164) is illustrated as being positioned between the vertical beam (1120) and the coupler (1140), but alternatively, the corner fixing member (1164) may be positioned close to the horizontal beam (1110) and the coupler (1140). In this case, two orthogonal edges among the edges of one side of the corner fixing member (1164) may be adjacent to the coupler (1140) and the horizontal beam (1110), respectively. In addition, in this case, the corner fixing member (1164) may be described as being formed at the end of the horizontal beam (1110).

[0122] Meanwhile, the greater the number of fixing parts (1160), the more stably the outer case (1001) and the installation surface can be fixed. However, if the number of fixing parts (1160) is large, the complexity of the installation process increases, which leads to longer installation times and increased worker fatigue. Therefore, the fixing parts (1160) formed on the outer case (1001) of the present embodiment are characterized by being provided in a minimal number by optimizing their positions.

[0123]

[0124] Fig. 13 is a perspective view of a battery rack included in a battery case (1000) according to Fig. 2. Fig. 14 is a drawing for explaining the position of a fixing part (1160) in a battery case (1000) according to Fig. 2.

[0125] Referring to FIGS. 13 and 14, a plurality of battery racks (2000) may be positioned inside the housing (1001) of the present embodiment. Here, each battery rack (2000) may be provided with a structure including a plurality of sub-racks (2001), such as a first sub-rack (2001a), a second sub-rack (2001b), and a third sub-rack (2001c).

[0126] Referring to FIG. 13, each sub-rack (2001) may include columns (2100, 2200) extending in a vertical direction and brackets (2300) coupled to these columns (2100, 2200) to form a receiving space in which a battery (5000) is mounted.

[0127] The columns (2100, 2200) may include a front column (2100) and a rear column (2200). By forming a square pillar shape with the two front columns (2100) and the two rear columns (2200), the overall appearance of the sub rack (2001) or the battery rack (2000) may be formed.

[0128] Adjacent sub-racks (2001) can be coupled to each other. By coupling two columns (2100, 2200) which are respectively included in two sub-racks (2001) and positioned adjacent to each other, two neighboring sub-racks (2001) can be coupled. The two adjacent columns (2100, 2200) can be coupled by a connecting block (not shown) positioned between the two sub-racks (2001). The two adjacent columns (2100, 2200) can be coupled by a support frame (2600) which crosses the top or bottom of the two sub-racks (2001).

[0129] In FIG. 13, the battery rack (2000) is illustrated as including three sub-racks (2001), but alternatively, the battery rack (2000) may include two sub-racks (2001). Furthermore, depending on design changes, the battery rack (2000) may include more sub-racks (2001).

[0130]

[0131] The position of the fixing part (1160) according to the present embodiment of FIG. 9 may be determined according to the structure of the battery rack (2000). More specifically, the fixing part (1160) of the present embodiment may be formed at a position corresponding to the columns (2100, 2200) of the battery rack (2000). The middle fixing part (1162) may be positioned to correspond to the columns (2100, 2200) of the battery rack (2000). Here, the positioning to correspond may mean that the fixing part (1160) or the middle fixing part (1162) is formed on an extension line of the direction in which the columns (2100, 2200) of the battery rack (200) extend (Z-axis direction).

[0132] Typically, the middle fixing part (1162) may be positioned at the center in the longitudinal direction (X-axis direction) to stably support the outer case (1001). However, as described above, the middle fixing part (1162) may not be positioned at the center in the longitudinal direction (X-axis direction). In addition, when there are multiple middle fixing parts (1162), the distance between the middle fixing parts (1162) may be evenly arranged.

[0133] However, in the battery case (1000) of the present embodiment, most of the weight may be due to the battery rack (2000), and the weight in the battery rack (2000) may be concentrated on the columns (2100, 2200). Therefore, in order to improve the stability of the battery case (1000), it may be preferable for the middle fixing member (1162) to be positioned corresponding to the columns (2100, 2200) of the battery rack (2000) rather than being positioned in the center.

[0134] As illustrated in FIG. 14, inside the case (1001) of the present embodiment, three battery racks (2000) each including three sub-racks (2001) may be positioned, and on the far left, one battery rack (2000) each including two sub-racks (2001) may be positioned. In addition, a control panel (3000) may be positioned adjacent to a battery rack (2000) including two sub-racks (2001).

[0135] If the middle fixing part (1162) does not correspond to the columns (2100, 2200) of the battery rack (2000), the weight of the battery rack (2000) may be concentrated in a relatively unstable position, which may cause the battery rack (2000) not to be stably fixed, or a large stress may be formed in a vulnerable part, which may cause the outer case (1001) to be damaged. Therefore, in the present embodiment, the middle fixing part (1162) is positioned to correspond to the columns (2100, 2200) of the battery rack (2000), and thereby the stress formed in the base (1100) of the outer case (1001) by the battery rack (2000) may be concentrated around the middle fixing part (1162).

[0136] Accordingly, the position of the middle fixing part (1162) in the longitudinal direction (X-axis direction) of the outer case (1001) may be close to the center of the outer case (1001), but may be a position spaced a certain distance from the center.

[0137] Meanwhile, the length value (LT) of the outer case (1001) may be formed differently depending on the length of the battery rack (2000) and the size of the control panel (3000). In the present embodiment, since the control panel (3000) is arranged toward the left or right side of the outer case (1001), the depth value of the control panel (3000) may affect the length value (LT) of the outer case (1001). Here, the size in the longitudinal direction (X-axis direction) of the outer case (1001) occupied by the control panel (3000) may be referred to as the first length (L1). The size in the longitudinal direction (X-axis direction) of the outer case (1001) occupied by the control panel (3000) may correspond to the depth value of the control panel (3000). In addition, the length value of the battery rack (2000) including two sub-racks (2001) may be referred to as the second length (L2). The length value of the battery rack (2000) including three sub-racks (2001) may be referred to as the third length (L3).

[0138] Here, the first length (L1), the second length (L2), and the third length (L3) may include at least a portion of the margin space provided on both sides of the control panel (3000) or the battery rack (2000). Therefore, the first length (L1) may refer to the size of the space occupied by the control panel (3000) and may be greater than the depth value of the control panel (3000). The second length (L2) and the third length (L3) may be greater than the length value of the battery rack (2000). The first length (L1) may refer to the size of the space occupied by the control panel (3000).

[0139] Referring back to FIG. 14, the middle fixed portion (1162) may be positioned spaced apart from both ends in the longitudinal direction (X-axis direction) of the outer case (1001) by a first fixed length (LL1) and a second fixed length (LL2). At this time, both ends in the longitudinal direction (X-axis direction) of the outer case (1001) may be referred to with the main column (1190) omitted. Here, the first fixed length (LL1) may be the sum of the first length (L1), the second length (L2), and the third length (L3). The second fixed length (LL2) may be twice the third length (L3). In addition, the internal space of the outer case (1001) corresponding to the first fixed length (LL1) may be referred to as the first space. The internal space of the outer case (1001) corresponding to the second fixed length (LL2) may be referred to as the second space.

[0140] The first fixed length (LL1) may be greater than the second fixed length (LL2). As illustrated in FIG. 14, five sub-racks (2001) may be positioned in the first space corresponding to the first fixed length (LL1). Six sub-racks (2001) may be positioned in the second space corresponding to the second fixed length (LL2). At least five sub-racks (2001) may be positioned between the middle fixed portion (1162) and the corner fixed portion (1164). At least five rows may be positioned between the middle fixed portion (1162) and the corner fixed portion (1164).

[0141] In the second space corresponding to the second fixed length (LL2), more batteries (5000) can be positioned than in the first space corresponding to the first fixed length (LL1), and accordingly, the weight of the first space can be smaller than the weight of the second space. In this way, the size of the second space having a larger weight can be formed smaller than the size of the first space having a smaller weight. When applying the principle of leverage, since the position of the middle fixing part (1162) is formed to be somewhat offset, the middle fixing part (1162) can support the outer case (1001) more stably than when it is formed at an even position.

[0142] Here, the principle of the lever is that the product of the distance between the fulcrum and the point of application and the weight of the object located at the point of application is equal to the product of the distance between the fulcrum and the point of effort and the force applied to the lever.

[0143] Fig. 15 is a drawing for explaining the arrangement of a plurality of battery cases according to Fig. 2. Fig. 16 is a drawing illustrating a modified example of a base included in the battery case according to Fig. 2.

[0144] Referring to FIGS. 15 and 16, in the present embodiment, corner fixing members (1164) may be individually provided at each corner of the outer case (1001). That is, there may be four corner fixing members (1164).

[0145] On the other hand, one middle fixing member (1162) may be provided for one horizontal beam (1110) included in the outer case (1001). Here, the number of middle fixing members (1162) may be two or more, but as described above, in the present embodiment, the middle fixing members (1162) are positioned to correspond to the columns (2100, 2200) of the battery rack (2000), so that two or more middle fixing members (1162) may be unnecessary.

[0146] Meanwhile, when a plurality of outer cases (1001) are provided in the installation space as shown in FIG. 15, two outer cases (1001) may be arranged so that their rear faces face each other. In this embodiment, since no door is provided on the rear of the outer cases (1001), the distance between the two outer cases (1001) facing each other's rear faces may be relatively small. Accordingly, when vibration or the like occurs, the two outer cases (1001) may support each other through their rear faces, so the middle fixing part (1162) formed on the horizontal beam (1110) on the rear side may be unnecessary. Accordingly, in this case, the minimum number of fixing parts (1160) formed on the outer case (1001) may be five. That is, the fixing parts (1160) of the outer case (1001) may include one middle fixing part (1162) and four corner fixing parts (1164).

[0147] On the other hand, in a case where the outer case (1001) is provided alone in the installation space as in Fig. 16, or two adjacent outer cases (1001) are arranged so that the left or rear surfaces face each other, it may be preferable that the middle fixing portions (1162) are formed on each of the two horizontal beams (1110) so that the rear side of the outer case (1001) is stably fixed. Accordingly, in this case, the minimum number of fixing portions (1160) formed on the outer case (1001) may be six. That is, the fixing portions (1160) may include two middle fixing portions (1162) and four corner fixing portions (1164).

[0148]

[0149] Below, the electrical connection relationship of the battery case included in the energy storage system according to the present embodiment is described.

[0150] Figures 17 to 19 are drawings for explaining the electrical connection structure inside a battery case according to one embodiment of the present invention. Figure 20 is a drawing for explaining the electrical connection structure of an energy storage system (1) according to one embodiment of the present invention.

[0151] Meanwhile, in FIG. 20, for the convenience of explanation, the sub-rack (2001) is omitted from the battery rack (2000), but the structure of the battery rack (2000) of the present embodiment is not limited thereby. Accordingly, the battery rack (2000) may include two or more sub-racks (2001), and the first cable (3100) extending from the control panel (3000) may be connected to each sub-rack (2001). More specifically, the first cable (3100) may be connected to the control unit (5100) located at the top of the sub-rack (2001).

[0152] Referring to FIGS. 17 to 20, the battery case (1000) of the present embodiment may receive power from an external electrical device, i.e., a PCS or control cabinet (4000), and may include cables (3100, 3200) for supplying power.

[0153] Cables (3100, 3200), including a first cable (3100) and a second cable (3200), can transmit charging power and discharging power. Cables (3100, 3200) can transmit charging power supplied to a battery case (1000) and / or discharging power discharged from the battery case (1000). Cables (3100, 3200) can transmit charging power supplied to a battery rack (2000) and / or discharging power discharged from the battery rack (2000). Cables (3100, 3200) can be connected to a control panel (3000) located inside the battery case (1000). Cables (3100, 3200) can electrically connect the control panel (3000) of the battery case (1000) and a control cabinet (4000). Cables (3100, 3200) can electrically connect the control panel (3000) and the battery rack (2000) within the battery enclosure (1000).

[0154] The first cable (3100) extends within the battery case (1000) and may form a connection between electrical devices located within the case (1001). The first cable (3100) may form an electrical connection between the control panel (3000) and the battery rack (2000).

[0155] Referring to FIG. 20, the battery rack (2000) may include a control unit (5100). The control unit (5100) may be located at the top or bottom of each column of the battery rack (2000), i.e., at each sub-rack (2001). The batteries (5000) stacked in each column may be connected in series, and the battery (5000) located at the top or bottom of the batteries (5000) in each column may be electrically connected to the control unit (5100). The control unit (5100) of the battery rack (2000) may be electrically connected to the control panel (3000) via a first cable (3100). In this way, power may be supplied to the battery (5000) via the control unit (5100).

[0156] The control unit (5100) may be connected to a BMS that collects status information of the battery rack (2000) and transmits the collected information to a control panel (3000) or a control cabinet (4000). The BMS connected to the control unit (5100) may be referred to as a rack BMS. Here, the rack BMS may also be described as being included in the control unit (5100).

[0157] Additionally, each battery (5000) may include a BMS that collects status information of the battery (5000) and transmits the collected information to a control unit (5100) or a rack BMS, etc. The BMS included in the battery (5000) may be referred to as a battery BMS. The rack BMS and / or the battery BMS may transmit the collected information to an external device or receive information from an external device. The control unit (5100) of the battery (5000) or the battery rack (2000) may be equipped with a communication unit for transmitting and / or receiving information from the rack BMS and / or the battery BMS.

[0158] The first cable (3100) may include a plurality of positive cables (3110) and a plurality of negative cables (3120). One end of each of the positive cables (3110) and the negative cables (3120) may be connected to a control panel (3000), and the other end may be connected to a control unit (5100) located in each row of the battery rack (2000), through which each of the control units (5100) may be connected in parallel with the control panel (3000). In this way, since each of the battery racks (2000) is connected in parallel with the control panel (3000), when a malfunction or fire phenomenon of a specific battery (5000) is confirmed by the BMS, the corresponding battery rack (2000) may be electrically cut off through the control unit (5100), thereby preventing additional problems.

[0159] The first cable (3100) may extend from one side to the other side in the longitudinal direction (X-axis direction) of the outer case (1001). In the present embodiment, the first cable (3100) may extend from the control space (1003) where the control panel (3000) is located in the direction where the power storage space (1002) where the battery rack (2000) is located. The first cable (3100) may be drawn out from the upper part of the control panel (3000). An opening through which the first cable (3100) passes may be located at the upper part of the control panel (3000) or around the control panel (3000).

[0160] The first cable (3100) may be located at the upper part of the enclosure (1001). The first cable (3100) extends upward from the upper part of the control panel (3000) and extends from one side to the other side within the upper part of the enclosure (1001), thereby allowing access to each control unit (5100) located at the top of the battery rack (2000). Here, the space through which the first cable (3100) extends for connecting the control panel (3000) and the battery rack (2000) may be referred to as a first distribution space (1004). The first distribution space (1004) may be located at the upper part of the enclosure (1001). Considering the location of the first cable (3100), the first cable (3100) may also be referred to as a loop cable.

[0161] In the past, a bus bar (310) or the like was provided in place of the first cable (3100) of the present embodiment. Therefore, in the past, the battery rack (2000) was mainly placed inside the outer case (1001), and then the battery rack (2000) and the bus bar (310) were electrically connected through a welding process on the upper part of the battery rack (2000). However, in the present embodiment, since the first cable (3100) is used, a welding process or the like is unnecessary, and an electrical connection can be formed more easily. In addition, since other structures for insulating the bus bar (310) are omitted, the space inside the outer case (1001) can be utilized more efficiently.

[0162] Meanwhile, since a plurality of first cables (3100) extending to the battery rack (2000) are positioned in the first distribution space (1004), if the positions of the first cables (3100) are not arranged in advance, twisting or the like between the plurality of first cables (3100) may occur. In addition, such twisting or the like between the first cables (3100) may cause fire or malfunction of the battery case (1000). However, the battery case (1000) of the present embodiment may be provided with a cable tray (3130) on which the first cables (3100) are mounted, thereby minimizing the above-described problem.

[0163] Referring to FIG. 17, a cable tray (3130) may be positioned in the first distribution space (1004). The first cable (3100) may be installed on the cable tray (3130). The first cable (3100) may be effectively organized through the cable tray (3130), thereby facilitating maintenance and repair of the battery enclosure (1000).

[0164] Referring to FIG. 19, the cable tray (3130) may have a two-stage structure. The cable tray (3130) may include an upper tray (3131), a lower tray (3132), and a bracket (3133) supporting them. A positive cable (3110) may be positioned on one of the upper tray (3131) and the lower tray (3132), and a negative cable (3120) may be positioned on the other.

[0165] One of the plurality of positive cables (3110) and one of the plurality of negative cables (3120) located on the cable tray (3130) may be connected to each battery rack (2000) or sub-rack (2001). Here, the plurality of positive cables (3110) and / or the plurality of negative cables (3120) located on each tray (3131, 3132) may be positioned side by side along the depth direction (Y-axis direction) of the enclosure (1001).

[0166] Among the plurality of positive cables (3110) and / or negative cables (3120) positioned in parallel along the depth direction (Y-axis direction), the positive cables (3110) and / or negative cables (3120) positioned closer to the control panel (3000) may be connected to the battery rack (2000) or sub-rack (2001). In other words, the positive cable (3110) and / or negative cable (3120) closest to the first door (1210) may be connected to the battery rack (2000) or sub-rack (2001) positioned closest to the control panel (3000). In addition, the positive cables (3110) and / or negative cables (3120) positioned closer to the rear (+Y-axis direction) may be connected to the battery rack (2000) or sub-rack (2001) positioned farther from the control panel (3000). In other words, the positive cable (3110) and / or negative cable (3120) that are furthest from the first door (1210) may be connected to the battery rack (2000) or sub-rack (2001) that is located furthest from the control panel (3000). This may be because the first cable (3100) is connected to the front of the battery rack (2000) or sub-rack (2001). Accordingly, if the first cable (3100) is connected to the rear of the battery rack (2000) or sub-rack (2001), the above-described connection positions may be reversed.

[0167] In this way, by arranging the positive cable (3110) and the negative cable (3120) vertically by the cable tray (3130), crosstalk between the first cables (3100) can be prevented. In addition, since the positions of the positive cable (3110) and the negative cable (3120) are determined in advance, connection between the first cable (3100) and the battery rack (2000) can be made easier.

[0168] In FIG. 19, the positive cable (3110) is shown as being located on the upper tray (3131) and the negative cable (3120) is shown as being located on the lower tray (3132), but this is not limited to this, and the positive cable (3110) may be located on the lower side and the negative cable (3120) may be located on the upper side.

[0169] Meanwhile, in the above, it has been described that the positive cable (3110) and the negative cable (3120) are respectively located in the upper tray (3131) and the lower tray (3132) of the cable tray (3130), but this is not limited thereto.

[0170] For example, the positive cable (3110) and the negative cable (3120) may be positioned together on the upper tray (3131), and the positive cable (3110) and the negative cable (3120) may be positioned together on the lower tray (3132). In this case, the positive cable (3110) may be positioned on one of the front and rear sides of each tray (3131, 3132), and the negative cable (3120) may be positioned on the other. Additionally, the positive cable (3110) and the negative cable (3120) located on the upper tray (3131) can be connected to a battery rack (2000) or a sub-rack (2001) located at a relatively long / short distance, and the positive cable (3110) and the negative cable (3120) located on the lower tray (3132) can be connected to a battery rack (2000) or a sub-rack (2001) located at a relatively short / short distance.

[0171] Referring again to FIG. 20, when the energy storage system (1) of the present embodiment includes two or more battery enclosures (1000), the control cabinet (4000) may be connected in parallel with the plurality of battery enclosures (1000). In other words, each battery enclosure (1000) may be individually connected to the control cabinet (4000).

[0172] On the other hand, in the conventional structure, the control cabinet (4000) is connected in series with a plurality of battery enclosures (1000). In the conventional structure, the control cabinet (4000) is connected to one of the battery enclosures (1000), the battery enclosure (1000) connected to the control cabinet (4000) is connected to an adjacent battery enclosure (1000), and the connected battery enclosure (1000) is again connected to the adjacent battery enclosure (1000), thereby forming an electrical connection within the energy storage system (1).

[0173] However, since the electrical connection between the battery enclosures (1000) must be formed after all the battery enclosures (1000) are fixed to the installation surface, there was a problem of increased installation time and complexity. In addition, the connection between the battery enclosures (1000) is mainly formed in the upper area near the ceiling, and it was not easy for the worker to perform the work in the upper area of ​​the battery enclosure (1000), so there was a problem of high fatigue and difficulty of the work. Furthermore, in addition to what is shown, the battery enclosure (1000) must be equipped with a separate communication connection structure or power connection structure, and such a connection structure can be mainly formed in the lower area near the bottom surface of the battery enclosure (1000). Therefore, in the conventional structure, there was a hassle in that the worker had to additionally perform construction work on the ceiling in addition to the construction work on the bottom part of the battery enclosure (1000).

[0174] In addition, since the battery enclosure (1000) is large in size and very heavy, it is not easy to move it further once it is positioned. Therefore, in order to connect multiple battery enclosures (1000) to each other on site, not only detailed process design and high skill of workers are required, but also a lot of time and money may be consumed. However, in reality, it is not easy to position the battery enclosures (1000) precisely in a predetermined position, and thus the gap between the installed battery enclosures (1000) may not be constant. In this case, when the gap between the battery enclosures (1000) is not constant, it may be more difficult to form a connection between adjacent battery enclosures (1000).

[0175] Moreover, in the conventional battery case, the bus bar (310) or the conductive member connected to the bus bar (310) could have a structure in which it penetrates the case and extends to the outside. Therefore, since an opening is formed at the top of the battery case (1000), there was a problem in that it was difficult to completely seal the case.

[0176] However, the energy storage system (1) of the present embodiment can solve the above-described problem by forming the electrical connection between the control cabinet (4000) and the plurality of battery enclosures (1000) as a parallel connection rather than a series connection. The battery enclosures (1000) can be individually connected to the control cabinet (4000) by a second cable (3200) extending from the control cabinet (4000), thereby simplifying the installation process of the energy storage system (1) and reducing the installation time. The second cable (3200) will be described in more detail below. In addition, since each battery enclosure (1000) is connected in parallel with the control cabinet (4000), when an abnormality occurs in one of the plurality of battery enclosures (1000), the corresponding battery enclosure (1000) can be quickly disconnected or removed from the control cabinet (4000), thereby facilitating power management.

[0177] Moreover, in the present embodiment, a direct electrical connection may not be formed between two adjacent battery enclosures (1000). Accordingly, while the busbar (310) or a member connected thereto had to be exposed to the outside of the enclosure (1001) in the past, in the present embodiment, the first cable (3100) may not be exposed to the outside. This enhances the sealing of the enclosure (1001), and makes it easier to manage the enclosure (1001).

[0178]

[0179] Meanwhile, the second cable (3200) may be for connecting the battery case (1000) and an external electrical device, for example, a control cabinet (4000). The second cable (3200) may extend from one side of the battery case (1000) to the outside, or the second cable (3200) may extend from an external device to one side of the battery case (1000).

[0180] The second cable (3200) may include a positive cable (3210) and a negative cable (3220). One end of each of the positive cables (3210) and the negative cables (3220) may be connected to a control cabinet (4000), and the other end may be connected to a control panel (3000) of a battery enclosure (1000), thereby allowing each battery enclosure (1000) to be connected in parallel with the control cabinet (4000). The number of positive cables (3210) and negative cables (3220) included in the second cable (3200) may be plural. Each of the positive cables (3210) and the negative cables (3220) may be connected to one battery enclosure (1000).

[0181] At least a portion of the second cable (3200) may be positioned at the bottom of the enclosure (1001). The second cable (3200) may extend downward from one side of the control cabinet (4000), then extend toward the battery enclosure (1000) from the lower side of the installation surface, and then extend upward again to access the control panel (3000) inside the battery enclosure (1000). The second cable (3200) may be introduced into the bottom of the control panel (3000). For this purpose, an opening through which the second cable (3200) passes may be positioned at the bottom of the control panel (3000) or around the control panel (3000). As illustrated in FIG. 17, the space through which the second cable (3200) extends for connecting the control panel (3000) and the control cabinet (4000) may be referred to as a second distribution space (1005). The second distribution space (1005) may include at least a portion of the lower portion of the enclosure (1001). In this way, the second cable (3200) may be protected from the external environment by extending from the lower portion of the installation surface. Considering the location of the second cable (3200), the second cable (3200) may also be referred to as a ground cable.

[0182]

[0183] Fig. 21 is an enlarged view of one side of the housing (1001) included in the battery housing (1000) according to Fig. 2. Figs. 22 and 23 are exploded perspective views of a closure unit that closes the opening of the battery housing (1000) according to Fig. 2. Fig. 24 is a modified example of the closure unit according to Fig. 23. Fig. 25 is a drawing comparing the connection between battery housings according to one embodiment of the present invention with the prior art.

[0184] Referring to FIGS. 21 to 25, the battery case (1000) of the present embodiment may include an opening (1170, 1180) through which a second cable (3200) passes.

[0185] The openings (1170, 1180), including the first opening (1170) and the second opening (1180), may be for connecting the inside and the outside of the battery case (1000). The openings (1170, 1180) may be for a second cable (3200) connecting the control panel (3000) and the control cabinet (4000). The openings (1170, 1180) may be located close to the control panel (3000) to which the second cable (3200) is connected. The openings (1170, 1180) may be for connecting the control space (1003) and the second distribution space (1005). The openings (1170, 1180) may be located in the control space (1003) or the second distribution space (1005). Alternatively, the opening (1170, 1180) may be located between the control space (1003) and the second distribution space (1005).

[0186] The first opening (1170) may be located on one side of the outer case (1001), and the second opening (1180) may be located on the other side of the outer case (1001). The side on which the first opening (1170) is formed and the other side on which the second opening (1180) is formed may be perpendicular to each other. The first opening (1170) may be located on the first side of the control space (1003), and the second opening (1170) may be located on the second side of the control space (1003) that is perpendicular to the first side. Specifically, the first opening (1170) may be formed on the lower surface of the outer case (1001), that is, the base (1100). The second opening (1180) may be formed on the side surface of the outer case (1001), that is, the front or the rear. Here, the first opening (1170) or the second opening (1180) may be one, or may be two or more. If there are two or more, the degree of freedom in connecting the second cable (3200) to the control panel (3000) can be further improved. For example, the positive cable (3210) and the negative cable (3220) of the second cable (3200) can be individually introduced into or withdrawn from the two first openings (1170).

[0187] Meanwhile, as illustrated in FIG. 25, the conventional battery case (1000) also included such an opening (1170). However, in the conventional structure such as that of the prior art document 2, the control panel (3000) of the battery case (1000) or a similar configuration was located in the center, and thus the location and number of openings were limited. For example, in the conventional structure, the opening (1170) could only be formed on the lower surface of the case (1001), and a structure such as the second opening (1180) of the present embodiment, which is located on the front or rear surface of the case (1001), could not be formed.

[0188] In addition, since the second cable (3200) must be bent to connect to the battery case (1000), the second cable (3200) may have a curvature. However, if the position and number of openings are limited, the curvature value of the second cable (3200) may be formed to be large depending on the installation environment, which may cause malfunction of the battery case (1001) or a break in the second cable (3200).

[0189] However, in the present embodiment, since the control panel (3000) is positioned on one side of the battery case (1000), openings (1170, 1180) can be formed on different sides of the case (1001). Since a plurality of openings (1170, 1180) are formed, when installing the battery case (1000), the worker can select one of the first opening (1170) and the second opening (1180) to place the second cable (3200). Accordingly, compared to the conventional structure, the structure of the present embodiment can increase the worker's installation efficiency. In addition, the curvature of the second cable (3200) can vary depending on the position of the openings (1170, 1180) selected by the worker, and thus, breakage of the second cable (3200), etc. can be prevented.

[0190] Meanwhile, since the openings (1170, 1180) are formed in multiple numbers in this embodiment, it may be desirable to seal the openings (1170, 1180) that are not used after the installation of the battery case (1000) is completed. Accordingly, the battery case (1000) of this embodiment may include a first closing unit (1171) for sealing the first opening (1170) and / or a second closing unit (1181) for sealing the second opening (1180). The first closing unit (1171) and the second closing unit (1181) will be described in more detail below.

[0191] As illustrated in FIG. 22, a box (1172, 1173) including a first box (1172) and a second box (1173) may be positioned in the first opening (1170) of FIG. 21. The boxes (1172, 1173) may be for protecting a second cable (3200) passing through the first opening (1170). The boxes (1172, 1173) may have a rectangular shape, and each side of the boxes (1172, 1173) may be positioned to surround the second cable (3200), thereby protecting the second cable (3200) from the external environment.

[0192] In the present embodiment, boxes (1172, 1173) may include a first box (1172) and a second box (1173). However, alternatively, only one of the first box (1172) and the second box (1173) may be provided.

[0193] Meanwhile, the boxes (1172, 1173) may not be configured to be included in the first closure unit (1171). In other words, the boxes (1172, 1173) may be configured to be included in the base (1100) of the outer case (1001) and may be provided in a state of being coupled to the edge of the first opening (1170). Accordingly, even when the second cable (3200) passes through the first opening (1170) by using the first opening (1170), the boxes (1172, 1173) may be positioned in the first opening (1170).

[0194] Here, the box (1172, 1173) may include four sides forming a rectangular tube shape. Furthermore, depending on the design, the box (1172, 1173) may have five sides closed in addition to one side corresponding to the opening. In this case, when installing the battery case (1000), a hole may be formed in the box (1172, 1173) for the passage of the second cable (3200).

[0195] However, depending on the embodiment, the boxes (1172, 1173) may not be included in the base (1100). The boxes (1172, 1173) may be provided for stable sealing of the first opening (1170) and may be included in the first closure unit (1171). In addition, depending on the embodiment, only the first box (1172) may be a configuration that is basically provided in the outer case (1001), and the second box (1173) may be a configuration that is optionally provided. In this case, the second box (1173) may be a configuration that prevents a gap between the first box (1172) and the first closure unit (1171), and the second box (1173) may be included in the first closure unit (1171).

[0196] The first closure unit (1171) for sealing the first opening (1170) may include an insulating material (1175), a sealing pad (1176), and a first cover (1177). In addition, as described above, the first closure unit (1171) may include one or both of the first box (1172) and the second box (1173).

[0197] The insulation (1175) may be used to seal the interior space of the box (1172, 1173). The insulation (1175) may be used to prevent condensation, etc. that may occur due to a temperature difference between the interior and exterior space of the outer case (1001). The insulation (1175) may be made of a material with low thermal conductivity.

[0198] The sealing pad (1176) may be provided to improve the sealing level of the first opening (1170). The sealing pad (1176) may be positioned between one surface of the base (1100) in which the first opening (1170) is formed and the first cover (1177). The sealing pad (1176) may be provided to cover a predetermined edge area extending radially from the edge of the first opening (1170). The sealing pad (1176) may be configured to prevent a gap from being formed around the first closure unit (1171) by ensuring that the edge of the first opening (1170) and the first cover (1177) are in close contact with each other. For this purpose, the sealing pad (1176) may be made of an elastic material.

[0199] The first cover (1177) may be configured to close one side of the first opening (1170). The first cover (1177) may cover the first opening (1170) on one side of the base (1100). The size of the first cover (1177) may be larger than the size of the first opening (1170).

[0200] The first closure unit (1171) can be coupled to the base (1100) via a fastening member such as a bolt. For example, after the first closure unit (1171) is positioned on the first opening (1170), a bolt is inserted into the edge of the first cover (1177), thereby coupling the first cover (1177) and the base (1100).

[0201] The second closure unit (1181) for sealing the second opening (1180) may include an insulating material (1185) and a second cover (1187). Here, the general contents of the insulating material (1185) and the second cover (1187) can be described with the contents of the insulating material (1175) and the first cover (1177) of the first closure unit (1171), and therefore, a detailed description thereof is omitted.

[0202] Additionally, as illustrated in FIG. 23, a third box (1182) may be provided in the second opening (1180). Since the third box (1182) overlaps with the aforementioned boxes (1172, 1173), a detailed description thereof will be omitted. As described above, the third box (1182) may be a configuration included in the base (1100) of the outer case (1001), or may be a configuration included in the second closure unit (1181).

[0203] In FIG. 23, the second closure unit (1181) is illustrated as not including a configuration similar to the sealing pad (1176) included in the first closure unit (1171). However, this is not limited thereto, and it is also possible for the second closure unit (1181) to be provided with a structure similar to the sealing pad (1176).

[0204] Since the second opening (1180) is located at the front or rear of the outer case (1001), it may be desirable to be more completely sealed than the first opening (1170). To this end, a second outer cover (1189) may be located on the outside of the second cover (1187). The second outer cover (1189) may be provided with the same or similar material as one side of the outer case (1001), thereby becoming integral with the outer case (1001). In this way, by providing the second outer cover (1189) to the second opening (1180), the second opening (1180) can be sealed more stably. In addition, depending on the design, such an outer cover may also be provided to the first opening (1170).

[0205] Meanwhile, even when the first opening (1170) or the second opening (1180) is used, it may be desirable to close an area other than the space where the second cable (3200) is located among the openings (1170, 1180) for sealing the outer case (1001). Accordingly, even when the first opening (1170) or the second opening (1180) is used, all or part of the first closure unit (1171) and the second closure unit (1181) may be located in the first opening (1170) or the second opening (1180).

[0206] Additionally, the opening (1170, 1180) being used in this manner may also be provided with additional configurations such as a second outer cover (1189) in addition to the closure unit (1171, 1181).

[0207] As illustrated in FIG. 24, when the second opening (1180) is used, the second outer cover (1189) may include a conduit (1188) that guides the position of the second cable (3200). The conduit (1188) may guide the second cable (3200) located outside the enclosure (1001) downward. The second cable (3200) may be protected through the conduit (1188), and the second opening (1180) may be effectively sealed. In addition, the first outer cover may also be provided when the first opening (1170) is used, and the first outer cover may also include a conduit or a similar structure.

[0208]

[0209] Below, the dimensions of the battery case according to the present embodiment are described.

[0210] In conventional battery enclosures (1000), the enclosure (1001) is primarily a conventional 20-foot or 40-foot enclosure. However, there are limitations in adjusting the size of the battery rack (2000) and control panel (3000) included in the battery enclosure (1000), and thus, even if the internal configuration is optimized, the dead space ratio may be high. Therefore, the battery enclosure (1000) of the present embodiment can provide a separately designed enclosure (1001) in addition to the standardized enclosure.

[0211] For example, when a product is distributed in units of battery cases (1000), minimizing the volume and weight of the case (1001) may be advantageous in terms of transportation. Furthermore, minimizing the volume and weight of the case (1001) while simultaneously maximizing the number of batteries (5000) installed inside may be advantageous in terms of power capacity, thereby increasing energy density.

[0212] Accordingly, in this embodiment, the length value (LT), depth value (DT), and height value (HT) of the outer case (1001) were reduced by minimizing dead space through internal space optimization.

[0213] For this purpose, for example, firstly, in the present embodiment, the control panel (3000) is positioned by rotating it 90 degrees, and accordingly, the size occupied by the control panel (3000) in the longitudinal direction (X-axis direction) of the case (1001) is minimized, and the length value (LT) of the case (1001) can be minimized.

[0214] Second, since the air conditioner (1300) is provided in a form coupled to the door (1200), the depth value (DT) of the outer case (1001) can be minimized.

[0215] Lastly, the battery case (1000) of the present embodiment adopts a cable (3100, 3200) instead of a bus bar (310) as a conductive member for electrical connection, thereby omitting the insulation and fixing structure of the bus bar (310), and minimizing the proportion of the distribution structure in the height value (LT) of the case (1001).

[0216]

[0217] Hereinafter, a more specific example will be described regarding the dimensions of the housing (1001). The dimensions of the housing (1001) described below can be described based on the size of the battery (5000). For convenience of description, the size of the battery (5000) on the X-axis can be referred to as BLT, the size on the Y-axis can be referred to as BDT, and the size on the Z-axis can be referred to as BHT.

[0218]

[0219] 1) Length value (LT)

[0220] The length value (LT) of the outer case (1001) can be expressed as follows.

[0221] (LT) = [Size occupied by power storage space (1002)] + [Size occupied by the skeletal structure of the enclosure (1001)] + [Size occupied by the control space (1003)] … Equation (1)

[0222] In this embodiment, a battery rack (2000) is positioned in the power storage space (1002), and the battery rack (2000) may include batteries (5000) arranged in rows in each sub-rack (2001). Accordingly, the size occupied by the power storage space (1002) in the longitudinal direction (X-axis direction) can be described as follows.

[0223] [Size occupied by power storage space (1002)] = [(BLT) * (Number of columns included in all battery racks (2000)) * (A1)] … Equation (1-1)

[0224] Here, the number of included rows of the battery rack (2000) may refer to the total number of batteries (5000) that can be placed in the longitudinal direction of the enclosure (1001). According to one embodiment, the number of included rows of the battery rack (2000) may be 10 or more. For example, the number of included rows of the battery rack (2000) may be 10 or more and 12 or less.

[0225] Here, the spacing compensation value (A1) may be a weight that takes into account the thickness of the columns (2100, 2200) of the battery rack (2000) and the spacing distance between the battery racks (2000) in addition to the length value (BLT) of the battery (5000). This spacing distance and the thickness of the frame may be proportional to the total number of rows formed in all battery racks (2000). Therefore, in Equation (1-1), the size in the longitudinal direction (X-axis direction) occupied by the power storage space (1002) can be calculated by applying the spacing compensation value (A1), which is a weight, to the length of the battery (5000) and the number of all rows included in all battery racks (2000).

[0226] The separation space compensation value (A1) can be selected from 1.1 to 1.5. For example, when the length value (BLT) of the battery (5000) is 400 cm and the total number of rows is 11, the size occupied by the power storage space (1002) in the length direction (X-axis direction) can be (400 cm)*(11)*(1.1) to (400 cm)*(11)*(1.5).

[0227] In addition, the housing (1001) may include an external structure such as a main column (1190) in addition to a power storage space (1002) including a battery rack (2000) and a control space (1003) including a control panel (3000). Therefore, when calculating the length value (LT) of the housing (1001), a value for the skeletal structure may need to be taken into consideration.

[0228] [Size occupied by the skeletal structure of the outer case (1001)] = (BLT)*(B1) … Equation (1-2)

[0229] Here, the external structure compensation value (B1) may be a weight that takes into account the skeletal structure of the main column (1190) and other columns. The size occupied by the external structure in the longitudinal direction (X-axis direction) may be expressed based on BLT, and may be calculated by multiplying BLT by B1.

[0230] The outer structure compensation value (B1) can be selected from 0.6 to 1.4. For example, when the length value (BLT) of the battery (5000) is 400 cm, the size occupied by the outer structure in the length direction (X-axis direction) can be (400 cm)*(0.6) to (400 cm)*(1.4).

[0231] Meanwhile, the size occupied by the control space (1003) in the longitudinal direction (X-axis direction) can be expressed based on the length value (BLT) of the battery (5000) as follows. At this time, the control space (1003) may include a control panel (3000) and other spaces.

[0232] [Size occupied by control space (1003)] = (BLT)*(E1) … Equation (1-3)

[0233] Here, the space compensation value (E1) is intended to indicate the size of the control space (1003) where other electrical components besides the control panel (3000) are located, based on the length value (BLT) of the battery (5000). E1 may be selected from 1.2 to 2.0. In this case, the smaller E1 value applied to equation (1-3) compared to the size of a typical control panel (3000) may be due to the control panel (3000) of the present embodiment being positioned toward the left or right side of the housing (1001).

[0234] Therefore, the length value according to this embodiment can be expressed as follows.

[0235] (LT) = [(BLT)*{(Number of columns included in all battery racks)*(A1)+(B1)+(E1)}] … Equation (1-4)

[0236]

[0237] 2) Height value (HT)

[0238] Meanwhile, the height value (HT) of the outer case (1001) can be expressed as follows.

[0239] (HT) = [Size occupied by the battery rack (2000) in the height direction] + [Size occupied by the skeletal structure of the enclosure (1001)] + [Size of the first distribution space (1004) required for the arrangement of the first cable (3100)]… Equation (2)

[0240] Here, the height of the battery rack (2000) may be proportional to the number of batteries (5000) that can be stacked on the battery rack (2000). In addition, since the battery rack (2000) includes a control unit (5100), this may need to be additionally considered.

[0241] Therefore, the size occupied by the battery rack (2000) in the height direction (Z-axis direction) can be described as follows.

[0242] [Size occupied by the battery rack (2000) in the height direction] = [(BHT) * {(Maximum number of batteries (5000) that can be installed in 1 row) + 1} * (A2)]… Equation (2-1)

[0243] Here, the maximum number of batteries (5000) that can be installed in one row may refer to the total number of batteries (5000) that can be placed in the height direction of the outer case (1001). Adding 1 to the maximum number of batteries (5000) that can be installed in the battery rack (2000) is in consideration of the control unit (5100). The maximum number of batteries (5000) that can be stacked in a row of the battery rack (2000) may be 16 or more. Preferably, the maximum number of batteries (5000) that can be stacked in a row of the battery rack (2000) may be 16 or more and 18 or less.

[0244] Here, the gap compensation value (A2) may be a weight that takes into account the structure of the battery rack (2000) and the resulting gap distance between the batteries (5000) in addition to the height value (BHT) of the batteries (5000). The gap compensation value (A2) may be selected from 1.0 to 1.3.

[0245] Additionally, the values ​​for the skeletal structure, such as the base (1100) of the outer case (1001), can be expressed based on the height value (BHT) of the battery (5000) as follows.

[0246] [Size occupied by the skeletal structure of the outer case (1001)] = (BHT)*(B2) … Equation (2-2)

[0247] Here, B2 can be 2 to 4.

[0248] Additionally, the size of the first distribution space (1004) can be expressed as follows based on the height value (BHT) of the battery (5000).

[0249] (Size of the first distribution space (1004)) = (BHT)*(E2) … Equation (2-3)

[0250] Here, the space compensation value (E2) may be used to indicate the size of the first distribution space (1004) based on the height value (BHT) of the battery (5000).

[0251] E2 can be selected from 1 to 3.

[0252] Therefore, the height value (HT) of the outer case (1001) can be expressed as follows.

[0253] (HT) = [(BHT)* [{(maximum number of batteries (5000) that can be installed in column 1)+1}*(A2)+(B2)+(E2)]] … Equation (2-4)

[0254]

[0255] 3) Depth value (DT)

[0256] Meanwhile, the depth value (DT) of the outer case (1001) can be expressed as follows.

[0257] (DT) = [size occupied by the battery rack (2000) in the depth direction] + [skeletal structure including the air conditioner (1300)]… Equation (3)

[0258] Here, the size occupied by the battery rack (2000) in the depth direction (Y-axis direction) can be described as follows.

[0259] [Size occupied by the battery rack (2000) in the depth direction] = (BDT) * (Number of rows included in the battery rack (2000)) * (A3)… Equation (3-1)

[0260] Here, the number of rows included in the battery rack (2000) may refer to the total number of batteries (5000) that can be placed in the depth direction of the housing (1001). The number of rows included in the battery rack (2000) may be 1 or 2, and may be, for example, 1.

[0261] Here, the gap compensation value (A3) may be a weight that takes into account the depth value (BDT) of the battery (5000), the thickness of the columns (2100, 2200) of the battery rack (2000), the gap distance between the battery rack (2000) and the outer case (1001), etc. The gap compensation value (A3) may be 1.0 to 1.1.

[0262] Additionally, the size occupied by the skeletal structure of the air conditioner (1300) can be expressed as follows.

[0263] [Size occupied by the skeletal structure of the air conditioner (1300)] = (BDT)*(B3) … Equation (3-2)

[0264] Here, B3 may be used to represent the size occupied by a structure other than the battery (5000) in the depth direction (Y-axis direction) as a depth value (BDT) of the battery (5000). B3 may be 0.2 to 0.8.

[0265] Therefore, the height value (HT) of the outer case (1001) can be expressed as follows.

[0266] (DT) = [(BDT)*(Number of rows in battery rack (2000))*(A3)+(B3)] … Equation (3-3)

[0267]

[0268] Meanwhile, the 20-foot or 40-foot enclosure dimensions used in conventional energy storage systems (1) are as follows.

[0269] 20-foot enclosure: 6,096 mm (20 ft) x 2,438 mm (8 ft) x 2,590 mm (8 ft 6 inches)

[0270] 40-foot enclosure: 12,192 mm (20 ft) x 2,438 mm (8 ft) x 2,590 mm (8 ft 6 in)

[0271] 20-foot HC enclosure: 6,096 mm (20 ft) x 2,438 mm (8 ft) x 2,895 mm (9 ft 6 in)

[0272] 40-foot HC enclosure: 12,192 mm (20 ft) x 2,438 mm (8 ft) x 2,895 mm (9 ft 6 in)

[0273] Hereinafter, the four figures described above will be referred to as "standard enclosure figures." Furthermore, these four figures may also be referred to as "20-foot standard enclosures" or "40-foot standard enclosures" depending on their length. Therefore, the terms "20-foot standard enclosures" and "40-foot standard enclosures" can be interpreted to encompass both general and HC specifications.

[0274]

[0275] On the other hand, the dimensions of the outer case (1001) of the present embodiment may have the following values.

[0276] 6,096 mm ≤ LT ≤ 8,696 mm

[0277] 1,638 mm ≤ DT ≤ 2,438 mm

[0278] 2,390 mm ≤ HT ≤ 3,490 mm

[0279] Here, the larger the length value (LT), the more batteries (5000) can be loaded into the case (1001). Therefore, if the length value (LT) of the case (1001) is less than 6,096 mm, the power capacity of the battery case (1000) may not be sufficient. In addition, if the length value (LT) of the case (1001) exceeds 8,696 mm, a large number of batteries (5000) can be loaded, but the volume and weight of the case (1001) increase excessively, which causes a problem of increased transportation costs.

[0280] Here, the smaller the depth value (DT), the smaller the volume of the housing (1001). This may be because a larger space is lost when the depth value (DT) is reduced than when the length value (LT) and the height value (HT) are reduced. Therefore, in the housing (1001) used for the battery housing (1000), the depth value (DT) may be selected as a relatively small value. Accordingly, the housing (1001) of the present embodiment may have a depth value equal to or smaller than the standard housing value, but if the depth value (DT) is less than 1,638 mm, it may be difficult to load the battery (5000). Therefore, it may be preferable that the depth value (DT) have a value equal to or greater than 1,638 mm and less than or equal to 2,438 mm.

[0281] Here, the larger the height value (HT), the more batteries (5000) can be vertically stacked, and as sufficient upper space is formed, electrical connections within the battery case (1000) can be easily formed. Therefore, when the height value (HT) of the case (1001) is less than 2,390 mm, there is a problem that electrical connections within the battery case (1000) are difficult or the number of batteries (5000) stacked is limited.

[0282] However, if the height value (HT) is excessively large, the transportation cost may increase as the overall volume value of the housing (1001) increases. Furthermore, if the height value (HT) is excessively large, it may be difficult to vertically stack the battery housing (1000) within the transportation space during transportation, which may lead to an increase in transportation cost. Considering this, the height value (HT) of the housing (1001) may be designed similarly to the standard housing size, and if the height value (HT) of the housing (1001) exceeds 3,490 mm, the transportation cost may increase excessively as described above.

[0283]

[0284] When comparing the enclosure (1001) of this embodiment with the 20 foot or 40 foot enclosure values, the depth value (DT) of the enclosure (1001) of this embodiment may be equal to or less than the standard enclosure.

[0285] In the case (1001), the front and rear surfaces may have larger areas than the other surfaces of the case (1001), and thus, by reducing the depth value (DT), the volume of the case (1001) may be effectively reduced. In this way, the case (1001) of the present embodiment may have a volume value equal to or smaller than that of a standard 20-foot or 40-foot case by reducing the depth value (DT) compared to the prior art.

[0286] Additionally, the length value (LT) of the enclosure (1001) of the present embodiment may be equal to or greater than a 20-foot enclosure and less than a 40-foot enclosure. Since the depth value (DT) of the enclosure (1001) of the present embodiment is reduced compared to a conventional enclosure, even if the length value (LT) increases, the enclosure (1001) of the present embodiment may have a volume value equal to or less than a conventional 20-foot enclosure. Accordingly, compared to a conventional enclosure having the same volume, a greater number of batteries (5000) may be loaded in the enclosure (1001) of the present embodiment.

[0287] In this way, the battery case (1000) of the present embodiment includes a case (1001) of optimized dimensions, thereby enabling loading of a greater number of batteries (5000) in the same space and achieving a reduction in transportation costs.

[0288]

[0289] Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims also fall within the scope of the present invention.

[0290]

[0291] [Explanation of symbols]

[0292] 1000: Battery case

[0293] 1001: Outer case

[0294] 1002: Power storage space

[0295] 1003: Control space

[0296] 1004: First distribution space

[0297] 1005: Second distribution space

[0298] 1100: Base

[0299] 1200: Door

[0300] 1300: Air conditioner

[0301] 2000: Battery Rack

[0302] 2001: Sub Rack

[0303] 3000: Control Panel

[0304] 3100: Cable 1

[0305] 3130: Cable tray

[0306] 3200: Second cable

[0307] 4000: Control Cabinet

[0308] 5000: Battery

[0309] 5100: Control Unit

Claims

1. An enclosure including a base fixed to the installation surface, and A battery rack is secured to the base and comprises at least one battery; The above battery rack comprises at least one column extending vertically, The above base comprises two horizontal beams and two vertical beams, The above horizontal beam includes a fixing member for fixing the battery case to the installation surface, The position of the above fixed part corresponds to the position of the column included in the battery rack.

2. In paragraph 1, The fixed part formed on the above horizontal beam is a single battery case.

3. In paragraph 1, A battery case in which a fixed part formed on the horizontal beam is positioned apart from the center in the longitudinal direction of the horizontal beam.

4. In paragraph 1, A battery case wherein the fixing member further includes a corner fixing member positioned adjacent to an end of the horizontal beam or an end of the vertical beam, in addition to a middle fixing member formed on the horizontal beam.

5. In paragraph 4, The above corner fixing members are in multiple numbers, The above middle fixing member is a battery case located between the two above corner fixing members.

6. In paragraph 5, The battery case wherein the above middle fixing member is positioned closer to one of the two corner fixing members than to the other.

7. In paragraph 4, The above battery rack is a battery enclosure including a plurality of rows of batteries stacked vertically.

8. In paragraph 4, The above middle fixing member is a battery case including a lower surface having a hole formed therein and a supporting surface extending from an edge of the lower surface to the horizontal beam.

9. In paragraph 4, A battery case wherein the corner fixing member includes a lower surface having a hole formed therein, and one edge of the lower surface is positioned adjacent to the horizontal beam or the vertical beam.

10. In paragraph 1, The above base includes a rack-mounted beam positioned between two of the above horizontal beams, and the column is a battery case secured to the rack-mounted beam.

11. In clause 10, Below the above rack fixed beam, a sub vertical beam is located, The above sub-vertical beam is a battery case arranged perpendicular to the above horizontal beam.

12. In paragraph 1, The above horizontal beam is a battery case including a bulkhead formed inside.

13. In paragraph 12, The above base further includes a sub-vertical beam arranged perpendicular to the above horizontal beam, A battery case in which both ends of the above sub-vertical beam are in contact with the bulkhead of the above horizontal beam.

14. In paragraph 1, The battery case further includes a control panel for managing the battery rack, and the front part of the control panel is arranged perpendicular to the front part of the battery rack.

15. In paragraph 1, The battery case further includes an air conditioner for heat dissipation of the at least one battery, and the air conditioner is provided in a state coupled to a door installed at the front of the battery rack so as to enable access to the battery rack.

16. In paragraph 1, The above battery case is a battery case in which cables are installed as conductive material for electrical connection.

17. An energy storage system comprising a battery housing according to paragraph 1.

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