Battery enclosure and energy storage system including the same

Abstract

A battery enclosure according to one embodiment of the present invention includes an enclosure having a housing space inside, a battery rack fixed in the housing space inside the enclosure and containing at least one battery, and a control panel electrically connected to the battery rack, wherein the housing space includes a power storage space in which the battery rack is located and a control space in which the control panel is located, and the enclosure has a plurality of openings formed on different surfaces from each other, through which cables pass.

Description

Technical Field

[0001] [Cross - Reference to Related Applications] This application claims the benefit of priority based on Korean Patent Application No. 10 - 2023 - 0172421 filed on December 01, 2023 and Korean Patent Application No. 10 - 2024 - 0150959 filed on October 30, 2024, and all the contents disclosed in the documents of the Korean patent applications are incorporated herein by reference.

[0002] The present invention relates to a battery container and an energy storage system including the same.

Background Art

[0003] Recently, while problems such as power shortages and environmentally friendly energy have emerged, energy storage systems (ESS; Energy Storage System) for storing the generated electricity have received a lot of attention. Typically, by using such an ESS, it is easy to construct a power management system such as a smart grid system, and it is possible to easily adjust the power supply and demand in a specific area or city. In addition, as the commercialization of electric vehicles has become full - fledged, such an ESS can also be applied to electric charging stations where electric vehicles can be charged.

[0004] The ESS can be configured in various forms, but typically it can be configured to include one or more outer boxes. In the outer box, a number of battery modules or battery packs (hereinafter referred to as batteries) are located, and the number of batteries can be connected in series and / or in parallel with each other.

[0005] On the other hand, since the battery pack located inside the outer casing is resting on a rack frame or the like, if the outer casing or rack frame shifts due to external shock or vibration, there is a problem that the battery pack may detach from the rack frame or be damaged. Therefore, the outer casing is required to be stably fixed to the installation site, which sometimes resulted in an increase in the number of anchors used to secure the outer casing to the ground. However, if the number of anchors required to stably fix the outer casing to the ground increases unnecessarily, it leads to problems of increased complexity and installation time during the installation process.

[0006] Furthermore, an ESS can include two or more outer casings, and as described in Patent Document 1 (Korean Published Patent No. 10-2023-0112086), the two or more outer casings can be electrically connected to each other to supply power. However, since the power distribution structure connecting the two outer casings must be formed after the outer casings are fixedly installed, there is a problem in that it is difficult for the ESS provider (seller) to control installation errors.

[0007] In addition, while ESS primarily uses standard 20-foot or 40-foot enclosures, the size of batteries and rack frames used in each product from different companies varies, creating a problem in that such structures cannot be efficiently housed inside the enclosure. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Korean Published Patent No. 10-2023-0112086 [Patent Document 2] China Utility Model No. 213212309 Specification [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] The problem that this invention aims to solve is to provide a battery enclosure with a compact structure and an energy storage system including the same, by achieving optimization of the internal space.

[0010] Another problem that the present invention aims to solve is to provide a battery enclosure and an energy storage system including the same, which have a simple installation process and guaranteed vibration resistance.

[0011] However, the problems that the embodiments of the present invention aim to solve are not limited to those described above, and can be broadly expanded within the scope of the technical ideas included in the present invention. [Means for solving the problem]

[0012] A battery enclosure according to one embodiment of the present invention includes an enclosure having a housing space inside, a battery rack fixed in the housing space inside the enclosure and containing at least one battery, and a control panel electrically connected to the battery rack, wherein the housing space includes a power storage space in which the battery rack is located and a control space in which the control panel is located, and the enclosure has a plurality of openings formed on different surfaces from each other, through which cables pass.

[0013] The cable can be connected to the control panel.

[0014] The opening can be located on one side along the length of the outer box.

[0015] An external cover is positioned in the opening, and the external cover may include a conduit for guiding cables connected to the control panel downwards.

[0016] The plurality of openings include a first opening and a second opening, the first opening being formed on a first surface of the control space, and the second opening being formed on a second surface of the control space, and the first surface and the second surface can be perpendicular to each other.

[0017] The first opening is formed in the base of the outer box, and the second opening can be formed in the front or rear surface of the outer box.

[0018] At least one of the first opening and the second opening can be two or more.

[0019] At least one of the first opening and the second opening can be closed by a closing unit.

[0020] The closing unit can include a cover covering the opening and a heat insulating material for filling the opening.

[0021] A sealing pad can be located between the peripheral edge of the opening and one surface of the cover.

[0022] The power storage space is opened and closed through a first door, the control space is opened and closed through a second door, and the first door and the second door can be positioned perpendicular to each other.

[0023] An energy storage system according to another embodiment of the present invention includes at least one of the battery outer boxes described above.

Advantages of the Invention

[0024] According to the embodiment, by changing the arrangement of the internal components, the dead space is minimized, and thereby, the space efficiency of the battery outer box and the energy storage system including the same can be improved.

[0025] Also, according to the embodiment, by changing the power distribution structure for providing power to the battery outer box and minimizing the number of anchors for fixing the battery outer box to the installation location, the ease of installation is improved, and the installation work can be simplified and made straightforward.

[0026] The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims. [Brief explanation of the drawing]

[0027] [Figure 1] This is a schematic block diagram of an energy storage system according to one embodiment of the present invention. [Figure 2] This is a perspective view of a battery casing according to one embodiment of the present invention. [Figure 3] This is a side view of a battery casing according to one embodiment of the present invention. [Figure 4] This is another side view of the battery casing according to one embodiment of the present invention. [Figure 5] This is a front view of a battery casing according to one embodiment of the present invention. [Figure 6] Figure 2 is a front view of the battery casing with some components omitted. [Figure 7] Figure 2 is a perspective view of the air conditioner included in the battery enclosure. [Figure 8] This is a cross-sectional view AA in Figure 2. [Figure 9] Figure 2 is a perspective view of the base of the outer box included in the battery casing. [Figure 10] Figure 9 is a cross-sectional view of BB. [Figure 11] This is an enlarged view of section C1 in Figure 9. [Figure 12] This is an enlarged view of section C2 in Figure 9. [Figure 13] Figure 2 is a perspective view of the battery rack included in the battery enclosure. [Figure 14] Figure 2 is a diagram illustrating the position of the fixing parts in the battery casing. [Figure 15] Figure 2 is a diagram illustrating the arrangement of multiple battery enclosures. [Figure 16] Figure 2 shows a modified example of the base included in the battery casing. [Figure 17] This is a drawing illustrating an electrical connection structure inside the battery casing according to one embodiment of the present invention. [Figure 18] This is a drawing illustrating an electrical connection structure inside the battery casing according to one embodiment of the present invention. [Figure 19] This is a drawing illustrating an electrical connection structure inside the battery casing according to one embodiment of the present invention. [Figure 20] This is a drawing illustrating the electrical connection structure of an energy storage system according to one embodiment of the present invention. [Figure 21] Figure 2 is a magnified view of one side of the outer casing included in the battery casing. [Figure 22] Figure 2 is an exploded perspective view of the closing unit that closes the opening of the battery casing. [Figure 23] Figure 2 is an exploded perspective view of the closing unit that closes the opening of the battery casing. [Figure 24] Figure 23 shows a modified example of the closed unit. [Figure 25] This diagram compares the connection between battery casings according to one embodiment of the present invention with the prior art. [Modes for carrying out the invention]

[0028] The following describes various embodiments of the present invention in detail, with reference to the attached drawings, so that those with ordinary skill in the art to which the present invention pertains can easily implement them. The present invention can be realized in various other forms besides those described below, and the scope of the present invention is not limited to the embodiments described herein.

[0029] To clearly illustrate the present invention, irrelevant parts have been omitted, and the same or similar reference numerals are used throughout the specification for identical or similar components.

[0030] Furthermore, the dimensions and thicknesses of each component shown in the drawings have been arbitrarily enlarged or reduced for the sake of explanation, and it is obvious that the content of the present invention is not limited to those shown. In the following drawings, the thickness of each layer is shown enlarged in order to clearly represent the various layers and regions. Also, in the following drawings, the thickness of some layers and regions is shown in an exaggerated manner for the sake of explanation.

[0031] Furthermore, when describing a layer, membrane, region, plate, or other part as being "on top of" another part, this must be interpreted to include not only cases where the layer, membrane, region, plate, or other part is "directly above" the other part, but also cases where the other part lies between them. Conversely, when describing a layer, membrane, region, plate, or other part as being "directly above" another part, it can mean that there is no other part between them. Also, being "on top of" a reference part means being located above or below the reference part, and does not necessarily mean being located "up" in the opposite direction of gravity. On the other hand, just as describing something as being "on top of" another part can be understood by referring to the above points, describing something as being "below" another part can also be understood.

[0032] Furthermore, when a specification as a whole states that a certain part "includes" a certain component, this does not mean that other components are excluded, but rather that other components may be included, unless otherwise stated.

[0033] Furthermore, throughout the specification, "on a plane" means when the part is viewed from above, and "on a cross-section" means when the part is viewed from the side of a cross-section obtained by cutting the part perpendicularly.

[0034] The following describes an energy storage system according to one embodiment of the present invention.

[0035] Figure 1 is a schematic block diagram of an energy storage system according to one embodiment of the present invention.

[0036] Referring to Figure 1, the energy storage system 1 according to this embodiment may include a battery enclosure 1000 containing multiple batteries 5000, and a control cabinet 4000 for managing the state of the battery enclosure 1000 and for overseeing the operation of the energy storage system 1.

[0037] The control cabinet 4000 is for overseeing the overall operation of the energy storage system 1. Through the control cabinet 4000, the energy storage system 1 can be connected to external devices. For example, the control cabinet 4000 can be connected to a PCS (Power Conversion System). By connecting the control cabinet 4000 and the PCS, the energy storage system 1 can receive charging power from the PCS and transmit discharge power to the PCS. Here, the PCS can also be described as being included in the energy storage system 1.

[0038] The control cabinet 4000 can be electrically connected to at least one battery enclosure 1000. The battery enclosure 1000 can be supplied with charging power from the control cabinet 4000 and can transmit discharge power to the control cabinet 4000.

[0039] The control cabinet 4000 may include a control unit for controlling the operation of the energy storage system 1. The control unit processes information received from the BMS of the battery enclosure 1000 and can instruct the battery enclosure 1000 to operate based on this information. The control unit can transmit electrical signals to and receive electrical signals from the BMS located outside the control cabinet 4000 via 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 contained in the battery rack 2000 and / or a battery BMS provided in each of the batteries 5000. As will be described later, the rack BMS can be connected to a control unit 5100 contained in the battery rack 2000.

[0040] The control cabinet 4000 is physically separated from the battery enclosure 1000. The control cabinet 4000 includes a separate housing, and the control unit described above can be protected from the external environment by being located within this housing, such as the enclosure.

[0041] The battery casing 1000 may include multiple battery racks 2000. A battery rack 2000 may include a number of subracks 2001, and a number of batteries 5000 may be stacked vertically in each subrack 2001. Here, the batteries 5000 located in each subrack 2001 can be described as forming a column. That is, if a battery rack 2000 includes three subracks 2001, the battery rack 2000 can be described as including batteries 5000 arranged in three columns.

[0042] The battery enclosure 1000 may include a control panel 3000 for managing the internal electrical equipment. The control panel 3000 can be electrically connected to each battery rack 2000. The control panel 3000 can be electrically connected to each subrack 2001 contained within the battery rack 2000. The control panel 3000 can 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 can be transmitted to the battery rack 2000 via the control panel 3000.

[0043] The control panel 3000 can be involved in the charging, discharging, and other operations of the battery rack 2000. Here, "involvement" includes not only the control of the operation of the battery rack 2000 through the decisions of the control panel 3000, but also the control panel 3000 receiving a request from the control cabinet 4000 and controlling the operation of the battery rack 2000 based on that request.

[0044] Furthermore, "involvement" can be interpreted broadly and may include cases where the control panel 3000 does not perform any information processing steps to control the operation of the battery rack 2000. For example, in some embodiments, the control panel 3000 may simply be for integrating cables or busbars extending from multiple battery racks 2000 into one. In such cases, even if electrical signals transmitted between the control cabinet 4000 and the battery rack 2000 are transmitted through the control panel 3000, the control panel 3000 does not need to perform any information processing steps other than transmitting signals during the transmission process. Thus, in this specification, even if electrical signals from the control cabinet 4000 are transmitted to the battery rack 2000 via the control panel 3000 without any separate information processing steps by the control panel 3000, it can still be described as the control panel 3000 being involved in the operation of the battery rack 2000.

[0045] The following describes a battery enclosure according to one embodiment of the present invention.

[0046] Figure 2 is a perspective view of a battery casing according to one embodiment of the present invention. Figure 3 is a side view of a battery casing according to one embodiment of the present invention. Figure 4 is another side view of a battery casing according to one embodiment of the present invention. Figure 5 is a front view of a battery casing according to one embodiment of the present invention. Figure 6 is a front view of the battery casing according to Figure 2 with some components omitted. Figure 7 is a perspective view of an air conditioner included in the battery casing according to Figure 2. Figure 8 is a cross-sectional view of AA in Figure 2.

[0047] Referring to Figures 2 to 8, the battery casing 1000 of this embodiment may include a casing 1001 having an internal storage space, and a battery rack 2000 located in the storage space formed by the casing 1001 for mounting the battery 5000.

[0048] Here, the battery 5000 can be a battery module or a battery pack, as an energy storage unit provided to the battery rack 2000. Although not specifically shown, the battery 5000 can be located in the battery rack 2000, which is situated in the housing space inside the outer casing 1001.

[0049] The outer box 1001 may have a hexahedral shape including a bottom surface, a top surface, and sides extending between the bottom and top surfaces. The sides of the outer box 1001 may be divided into a front surface, a rear surface, a left surface, and a right surface. The outer box 1001 may be described as having a length, depth, and height.

[0050] Here, the length value LT of the outer casing 1001 can be the size on the X-axis. The depth value DT of the outer casing 1001 can be the size on the Y-axis. The height value HT of the outer casing 1001 can be the size on the Z-axis. Here, the length, depth, and height values ​​of the battery rack 2000 can also be described as sizes on the X-axis, Y-axis, and Z-axis, similar to the outer casing 1001.

[0051] Furthermore, both sides of the outer casing 1001 in the longitudinal direction (X-axis direction) can be referred to as the left side (-X-axis direction) and the right side (+X-axis direction). Both sides of the outer casing 1001 in the depth direction can be referred to as the front side (-Y-axis direction) and the rear side (+Y-axis direction). Both sides of the outer casing 1001 in the height direction can 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 up and down directions of the battery rack 2000 can also be described in this way.

[0052] The outer casing 1001 may include a base 1100 that forms the lower part of the outer casing 1001, a main column 1190 positioned vertically perpendicular to the base 1100 at the corner of the base 1100, and a loop 1192 that is vertically connected to the main column 1190 and forms the upper part of the outer casing 1001.

[0053] Plate-shaped members can be positioned between the main columns 1190 of the outer box 1001, and the opposing peripheries of the plate-shaped members can be fixed to the main columns 1190 to form the sides of the outer box 1001. However, as will be described later, a door 1200 or other member can be provided on a portion of the sides of the outer box 1001.

[0054] The outer casing 1001 may include a door 1200 for opening and closing. By opening at least one side of the outer casing 1001 through the door 1200, a worker can access the internal components of the outer casing 1001, thereby enabling maintenance and repair of the battery casing 1000. Furthermore, by closing the door 1200, the interior of the outer casing 1001 can be isolated from the outside, thereby protecting the internal battery 5000 and other components from the external environment.

[0055] There may be multiple doors 1200. 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 outer casing 1001, and the second door 1220 may be located on the other side of the outer casing 1001.

[0056] The first door 1210 may be for allowing worker access to the battery rack 2000. The battery rack 2000 can be located behind the first door 1210. The presence of the first door 1210 in the outer casing 1001 allows for the resolution of problems with the battery casing 1000 by quickly separating or replacing the battery 5000 or the battery rack 2000 in the event of a battery failure or fire in the battery 5000.

[0057] Here, there can be multiple first doors 1210. Each first door 1210 may be for the individual management of a battery rack 2000. Each first door 1210 can correspond to each battery rack 2000 located in the housing space. However, depending on the design, it is also possible to have more or fewer first doors 1210 than the number of battery racks 2000.

[0058] The second door 1220 may be for allowing worker access to the control panel 3000. The control panel 3000 may be located behind the second door 1220.

[0059] The first door 1210 and the second door 1220 can be positioned perpendicular to each other. One side of the outer casing 1001 where the first door 1210 is located and the other side where the second door 1220 is located can be perpendicular to each other. Specifically, for example, the first door 1210 can be located on the front of the outer casing 1001, and the second door 1220 can be located on either the left or right side of the outer casing 1001.

[0060] On the other hand, conventionally, doors were provided on the front and rear of the outer casing 1001 to facilitate the installation and management of the battery 5000. However, since the outer casing 1001 is mainly designed with a large length value LT, if a door is provided on the rear, the door occupies a relatively large area, which makes sealing and managing the outer casing 1001 even more difficult. In addition, if a door is provided on the rear, it is difficult for workers to access, and if two outer casings 1001 are arranged facing each other at the rear, a sufficient separation space is required for worker access, making efficient use of space difficult. However, in the outer casing 1001 of this embodiment, the above problems are minimized by providing a second door 1220 on the left or right side instead of a door located on the rear.

[0061] Referring to Figure 6, in this embodiment, the internal storage space of the outer casing 1001 can include a power storage space 1002 and a control space 1003.

[0062] The power storage space 1002 and the control space 1003 can be located side by side along the length (X-axis direction) of the outer casing 1001. The power storage space 1002 can be located on one side along the length (X-axis direction) of the outer casing 1001, and the control space 1003 can be located on the other side along the length (X-axis direction) of the outer casing 1001. More specifically, the power storage space 1002 can be located on the right or left side of the outer casing 1001, and the control space 1003 can be located on the left or right side of the outer casing 1001.

[0063] 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 isolated from each other. Therefore, it is not necessary to add a partition or anything similar to separate the power storage space 1002 and the control space 1003.

[0064] The power storage space 1002 may be a space that is opened and closed by the first door 1210. A battery rack 2000 containing a battery 5000 may be located in the power storage space 1002.

[0065] The control space 1003 can be a space opened and closed by the second door 1220. A control panel 3000 can be located in the control space 1003. As described above, the second door 1220 can open toward the left or right side of the outer casing 1001, due to the location of the control panel 3000. The control panel 3000 can be positioned to face either the left or right side of the outer casing 1001. The door of the control panel 3000 can correspond to the second door 1220 of the outer casing 1001. The control panel 3000 has a relatively small depth, and by positioning such a control panel 3000 toward the left or right side rather than the front, the dead space of the outer casing 1001 can be minimized. This also minimizes the length value LT of the outer casing 1001.

[0066] On the other hand, this may be because the control panel 3000 is located on one side of the outer casing 1001. As shown in Patent Document 2 (Chinese Utility Model Registration Publication 213212309), conventional control panels 3000 are located in the center of the outer casing 1001. If the control panel 3000 is located in the center, the distance between the control panel 3000 and each battery rack 2000 can be shortened, but the position of the control panel 3000 is fixed to face the front, which has the problem of not being able to use the space efficiently. However, in this embodiment, by positioning the control panel 3000 in a control space 1003 provided on one side of the outer casing 1001, the position of the control panel 3000 can be freely adjusted. As a result, the position of the control panel 3000 can be changed to face the left or right side of the outer casing 1001, thereby minimizing dead space in the internal space of the outer casing 1001. Here, the orientation of the control panel 3000 can be explained based on the direction in which the door of the control panel 3000 faces.

[0067] Referring to Figure 4, the outer casing 1001 of this embodiment may include an explosion-proof door 1230. The explosion-proof door 1230 may be for venting gas generated by an internal thermal runaway phenomenon to the outside. The explosion-proof door 1230 normally remains closed, but can be opened when a thermal runaway phenomenon occurs in the battery 5000, thereby allowing communication between the inside and outside of the outer casing 1001. There may be one explosion-proof door 1230 or multiple explosion-proof doors. The explosion-proof door 1230 can be located on one side of the outer casing 1001 facing the second door 1220. However, it is also possible for the explosion-proof door 1230 to be formed in a position different from that described above.

[0068] Referring to Figures 7 and 8, the outer casing 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. This minimizes the space occupied by the air conditioner 1300 inside the outer casing 1001.

[0069] In this embodiment, the first door 1210 can be positioned corresponding to each battery rack 2000. The air conditioner 1300 can correspond to each battery rack 2000 by being provided coupled to the first door 1210. However, the design may allow for more or fewer first doors 1210 to be placed than the number of battery racks 2000, thereby setting the range to which each air conditioner 1300 corresponds differently from that described above.

[0070] The air conditioner 1300 in this embodiment can be a configuration in which an indoor unit for cooling the interior and an outdoor unit for discharging heat to the outside are combined. As shown in Figure 5, the air conditioner 1300 includes an outdoor inlet 1310 and an outdoor outlet 1320 located on the outside of the outer casing 1001, through which outside air can be drawn in and air can be discharged. Referring to Figures 7 and 8, the air conditioner 1300 may also include an indoor inlet 1330 and an indoor outlet 1340 located on the inside of the outer casing 1001. The air discharged through the indoor outlet 1340 can move to the rear of the battery rack 2000, and the moved air can then move again from the rear to the front of the battery rack 2000, thereby cooling the batteries placed on the battery rack 2000.

[0071] On the other hand, guides 1350 can be positioned around the indoor exhaust port 1340 to guide the airflow. The air discharged from the indoor exhaust port 1340 through the guides 1350 can be concentrated at the top of the outer casing 1001 and then move to the rear of the battery rack 2000. If the air discharged from the air conditioner 1300 is dispersed into a wide space, it is difficult to form an airflow for cooling the battery 5000, so the guides 1350 may be for forming an airflow inside the outer casing 1001.

[0072] The structure of the base 1100 of the battery casing 1000 according to this embodiment will be described below.

[0073] Figure 9 is a perspective view of the base of the outer casing included in the battery casing according to Figure 2. Figure 11 is an enlarged view of section C1 in Figure 9. Figure 12 is an enlarged view of section C2 in Figure 9.

[0074] Referring to Figures 9 to 12, the outer casing 1001 of this 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.

[0075] Two horizontal beams 1110 and two vertical beams 1120 can form the outer shape of the base 1100. The horizontal beams 1110 and vertical beams 1120 are arranged vertically, and a rectangular shape can be formed by connecting one end of the horizontal beam 1110 and one end of the vertical beam 1120. Here, a coupler 1140 can be provided to connect 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 connected in a form other than a coupler 1140.

[0076] The horizontal beam 1110 may be a structure that extends along the length direction (X-axis direction) of the outer casing 1001. The vertical beam 1120 may be a structure that extends along the depth direction (Y-axis direction) of the outer casing 1001. The length of the horizontal beam 1110 may be greater than the length of the vertical beam 1120.

[0077] Referring to Figure 10, the horizontal beam 1110 may include a partition wall 1110a internally, which can further enhance the rigidity of the horizontal beam 1110. The partition wall 1110a allows the axial cross-sectional shape of the horizontal beam 1110 to include an I-shape. The cross-section of the horizontal beam 1110 may have a shape in which at least one of the two open I-shaped sides is closed. Here, the axial cross-section may mean a cross-section cut perpendicular to the axis along the length of the horizontal beam 1110.

[0078] On the other hand, the design allows for the placement of bulkheads not only within the horizontal beam 1110 but also within the vertical beam 1120.

[0079] A plate-shaped member 1150 can be positioned above the two horizontal beams 1110 and the two vertical beams 1120. The plate-shaped member 1150 can form the upper surface of the base 1100. There may be one plate-shaped member 1150, or there may be multiple as shown in Figure 9. A battery rack 2000 can be placed on the plate-shaped member 1150. Multiple holes can be formed in the plate-shaped member 1150, and the battery rack 2000 can be fixed to the base 1100 by inserting fixing members such as bolts into the holes in the plate-shaped member 1150 when the battery rack 2000 is positioned on the plate-shaped member 1150.

[0080] A sub-horizontal beam 1112 can be positioned between the two horizontal beams 1110. The sub-horizontal beam 1112 can be positioned parallel to the horizontal beams 1110. A sub-vertical beam 1122 can be positioned between the two vertical beams 1120. The sub-vertical beam 1122 can be positioned parallel to the vertical beams 1120. By having the sub-horizontal beam 1112 support the plate-shaped member 1150 together with the horizontal beams 1110, the battery rack 2000 can be stably supported by the base 1100. In addition, by having the sub-vertical beam 1122 extend between the two horizontal beams 1110 or between the horizontal beams 1110 and the sub-horizontal beam 1112, the rigidity of the base 1100 structure can be complemented.

[0081] Here, the sub-horizontal beam 1112 may be a structure that extends perpendicularly to the vertical beam 1120 between the two vertical beams 1120. The sub-vertical beam 1122 may be a structure that extends perpendicularly to the horizontal beam 1110 between one of the two horizontal beams 1110 and the sub-horizontal beam 1112.

[0082] The end of the sub-vertical beam 1122 can abut against the bulkhead 1110a of the horizontal beam 1110. By fixing the sub-vertical beam 1122 and the bulkhead 1110a together, the structural stability of the base 1100 can be improved.

[0083] By arranging the horizontal beam 1110, vertical beam 1120, sub-horizontal beam 1112, and sub-vertical beam 1122 parallel to or perpendicular to each other, a grid space can be formed between the beams 1110, 1120, 1112, and 1122. An insulating material 1128 can be provided in the aforementioned grid space.

[0084] The cross-section of the sub-vertical beam 1122 may be smaller than that of the vertical beam 1120, allowing the sub-vertical beam 1122 to be located relatively inside the base 1100 compared to the other beams 1110, 1120, and 1112. This allows a separation space to be formed between the sub-vertical beam 1122 and the plate-shaped member 1150, in which the rack-fixing beam 1130 can be positioned.

[0085] The rack fixing beam 1130 may be for the stable fixing of the base 1100 and the battery rack 2000. The rack fixing beam 1130 can be positioned at the joint between the battery rack 2000 and the base 1100. The rack fixing beam 1130 can extend parallel to the horizontal beams 1110 between two horizontal beams 1110. The rack fixing beam 1130 can be a structure that extends perpendicularly to the vertical beams 1120 between two vertical beams 1120. The cross-section of the rack fixing beam 1130 may be smaller than the cross-section of the horizontal beams 1110. The rack fixing beam 1130 can be positioned above a sub-vertical beam 1122, thereby allowing the rack fixing beam 1130 to be supported by the sub-vertical beam 1122.

[0086] Holes can be formed in the rack fixing beam 1130, and the holes in the rack fixing beam 1130 can correspond to the holes in the plate-shaped member 1150. With the holes in the rack fixing beam 1130 and the holes in the plate-shaped member 1150 located on the same axis, the fixing member that penetrates the lower part of the battery rack 2000 is inserted into the aforementioned holes, thereby stably fixing the battery rack 2000 and the base 1100.

[0087] On the other hand, the base 1100 may include a fixing portion 1160 for stable fixing of the outer casing 1001 to the mounting surface. The fixing portion 1160 includes a hole into which a fixing member such as a bolt or washer can be inserted to fix the outer casing 1001 to the mounting surface.

[0088] Referring to Figures 11 and 12, the fixing portion 1160 may include a middle fixing portion 1162 and a corner fixing portion 1164.

[0089] As shown in Figure 11, the middle fixing portion 1162 can be formed on the horizontal beam 1110. The middle fixing portion 1162 may include a lower surface in which a hole is formed 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 that extends perpendicularly from the periphery of the lower surface and connects to the horizontal beam 1110.

[0090] The middle fixing portion 1162 does not have to be located in the center along the length of the horizontal beam 1110. The middle fixing portion 1162 can be located between two corner fixing portions 1164. The middle fixing portion 1162 can be located even closer to one of the two corner fixing portions 1164 than to one of the other. In Figure 9, the middle fixing portion 1162 can be located even closer to a corner fixing portion 1164 located on the -Y axis than to a corner fixing portion 1164 located on the +Y axis. This will be explained in more detail in Figures 13 and 14.

[0091] As shown in Figure 12, the corner fixing portion 1164 can be positioned adjacent to the coupler 1140. The corner fixing portion 1164 may include one surface in which a hole is formed. One edge of the surface included in the corner fixing portion 1164 may be adjacent to the coupler 1140. Another edge of the surface included in the corner fixing portion 1164, perpendicular to the aforementioned edge, may be adjacent to the vertical beam 1120. The corner fixing portion 1164 may be coupled to the vertical beam 1120 or the coupler 1140. That is, the corner fixing portion 1164 may be formed at the end of the vertical beam 1120. Alternatively, the corner fixing portion 1164 may be formed on the coupler 1140.

[0092] In Figure 12, the corner fixing portion 1164 is shown to be located between the vertical beam 1120 and the coupler 1140. However, it is also possible for the corner fixing portion 1164 to be located closer to the horizontal beam 1110 and the coupler 1140. In such a case, two orthogonal edges of one side of the corner fixing portion 1164 can be adjacent to the coupler 1140 and the horizontal beam 1110, respectively. In this case, the corner fixing portion 1164 can be described as being formed at the end of the horizontal beam 1110.

[0093] On the other hand, the more fixing parts 1160 there are, the more stably the outer box 1001 and the mounting surface can be fixed. However, if the number of fixing parts 1160 is large, the complexity of the installation process increases, the installation time increases, and the fatigue of the workers increases. Therefore, the fixing parts 1160 formed on the outer box 1001 in this embodiment are provided in the minimum number possible by optimizing their position.

[0094] Figure 13 is a perspective view of the battery rack included in the battery enclosure according to Figure 2. Figure 14 is a diagram illustrating the position of the fixing parts in the battery enclosure according to Figure 2.

[0095] Referring to Figures 13 and 14, multiple battery racks 2000 can be located inside the outer casing 1001 of this embodiment. Here, each battery rack 2000 can be provided with a structure including multiple subracks 2001, such as a first subrack 2001a, a second subrack 2001b, and a third subrack 2001c.

[0096] Referring to Figure 13, each subrack 2001 may include vertically extending columns 2100, 2200 and brackets 2300 that connect to columns 2100, 2200 to form a housing space on which the battery 5000 is mounted.

[0097] Columns 2100 and 2200 may include a front column 2100 and a rear column 2200. The two front columns 2100 and the two rear columns 2200 can form a rectangular prism shape, thereby forming the overall outline of the subrack 2001 or battery rack 2000.

[0098] Adjacent subracks 2001 can be joined together. Two adjacent subracks 2001 can be joined by joining two columns 2100 and 2200 contained in each of two subracks 2001 and located adjacent to each other. Two adjacent columns 2100 and 2200 can be joined by a connecting block (not shown) located between the two subracks 2001. Two adjacent columns 2100 and 2200 can be joined by a support frame 2600 that crosses the upper or lower ends of the two subracks 2001.

[0099] Although Figure 13 shows that the battery rack 2000 contains three subracks 2001, it is also possible for the battery rack 2000 to contain two subracks 2001. Furthermore, with design modifications, the battery rack 2000 can contain even more subracks 2001.

[0100] The position of the fixing portion 1160 in this embodiment shown in Figure 9 can be determined by the structure of the battery rack 2000. More specifically, the fixing portion 1160 in this embodiment can be formed in a position corresponding to the columns 2100 and 2200 of the battery rack 2000. The middle fixing portion 1162 can be positioned to correspond to the columns 2100 and 2200 of the battery rack 2000. Here, "positioned to correspond" means that the fixing portion 1160 or the middle fixing portion 1162 can be formed on the extension line in the direction in which the columns 2100 and 2200 of the battery rack 2000 extend (Z-axis direction).

[0101] Normally, it is preferable that the middle fixing portion 1162 is located in the center along the length direction (X-axis direction) in order to stably support the outer box 1001. Also, if there are multiple middle fixing portions 1162, it is preferable that the distance between them is equal.

[0102] However, in the battery casing 1000 of this embodiment, much of the weight may be due to the battery rack 2000, and the weight of the battery rack 2000 can be concentrated in columns 2100 and 2200. Therefore, for the stability of the battery casing 1000, it is preferable that the middle fixing part 1162 is located in the center and positioned to correspond to columns 2100 and 2200 of the battery rack 2000.

[0103] As illustrated in Figure 14, the outer casing 1001 of this embodiment can accommodate three battery racks 2000, each containing three subracks 2001, and one battery rack 2000 containing two subracks 2001. The control panel 3000 can be positioned adjacent to the battery rack 2000 containing two subracks 2001.

[0104] If the middle fixing portion 1162 does not correspond to the columns 2100 and 2200 of the battery rack 2000, the weight of the battery rack 2000 may be concentrated in a relatively unstable position, potentially causing the battery rack 2000 to not be stably fixed, or large stresses to be formed in a weak area, potentially damaging the outer casing 1001. Therefore, in this embodiment, the middle fixing portion 1162 is positioned to correspond to the columns 2100 and 2200 of the battery rack 2000, thereby allowing the stresses formed on the base 1100 of the outer casing 1001 by the battery rack 2000 to be concentrated around the middle fixing portion 1162.

[0105] As a result, the position of the middle fixing part 1162 on the longitudinal direction (X-axis direction) of the outer box 1001 may be close to the center of the outer box 1001, but at a certain distance away from the center.

[0106] On the other hand, the length value LT of the outer casing 1001 can be formed differently depending on the length of the battery rack 2000 and the size of the control panel 3000. In this embodiment, since the control panel 3000 is positioned toward the left or right side of the outer casing 1001, the depth value of the control panel 3000 can affect the length value LT of the outer casing 1001. Here, the size of the outer casing 1001 occupied by the control panel 3000 in the longitudinal direction (X-axis direction) can be referred to as the first length L1. The size of the outer casing 1001 occupied by the control panel 3000 in the longitudinal direction (X-axis direction) can correspond to the depth value of the control panel 3000. Furthermore, the length value of the battery rack 2000 containing two subracks 2001 can be referred to as the second length L2. The length value of the battery rack 2000 containing three subracks 2001 can be referred to as the third length L3.

[0107] Here, the first length L1, the second length L2, and the third length L3 can be described as including 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 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 can represent the size of the space occupied by the control panel 3000.

[0108] Referring again to Figure 14, the middle fixing section 1162 can be positioned at a distance of a first fixing length LL1 and a second fixing length LL2 from both ends of the outer box 1001 in the longitudinal direction (X-axis direction). At this time, both ends of the outer box 1001 in the longitudinal direction (X-axis direction) can be referred to as the state without the main column 1190. Here, the first fixing length LL1 can be the sum of the first length L1, the second length L2, and the third length L3. The second fixing length LL2 can be twice the third length L3. Furthermore, the internal space of the outer box 1001 corresponding to the first fixing length LL1 can be referred to as the first space. The internal space of the outer box 1001 corresponding to the second fixing length LL2 can be referred to as the second space.

[0109] The first fixed length LL1 may be greater than the second fixed length LL2. As shown in Figure 14, five subracks 2001 can be located in the first space corresponding to the first fixed length LL1. Six subracks 2001 can be located in the second space corresponding to the second fixed length LL2. At least five subracks 2001 can be located between the middle fixing section 1162 and the corner fixing section 1164. At least five rows can be located between the middle fixing section 1162 and the corner fixing section 1164.

[0110] More batteries 5000 can be placed in the second space corresponding to the second fixed length LL2 than in the first space corresponding to the first fixed length LL1, and as a result, the weight of the first space can be less than the weight of the second space. In this way, the size of the heavier second space can be formed to be smaller than the size of the lighter first space. By analogy with the lever principle, if the middle fixing part 1160 is formed with a partial bias, the middle fixing part 1160 can support the outer casing 1001 more stably than if it were formed at an even position.

[0111] Here, the principle of the lever states that the product of the distance between the support point and the point of application and the weight of the object at the point of application is the same as the product of the distance between the support point and the point of force application and the force applied to the lever.

[0112] Figure 15 is a diagram illustrating the arrangement of multiple battery enclosures as shown in Figure 2. Figure 16 is a diagram showing a modified example of the base included in the battery enclosure as shown in Figure 2.

[0113] Referring to Figures 15 and 16, in this embodiment, the corner fixing portion 1164 can be provided individually to each corner of the outer box 1001. In other words, there can be four corner fixing portions 1164.

[0114] On the other hand, one middle fixing part 1162 can be provided for one horizontal beam 1110 included in the outer casing 1001. Here, there may be two or more middle fixing parts 1162, but as described above, in this embodiment, since the middle fixing parts 1162 are positioned to correspond to the columns 2100 and 2200 of the battery rack 2000, two or more middle fixing parts 1162 may not be necessary.

[0115] On the other hand, when multiple outer boxes 1001 are provided in the installation space as shown in Figure 15, two outer boxes 1001 can be arranged with their rear surfaces facing each other. In this embodiment, since there is no door on the rear surface of the outer box 1001, the distance between the two outer boxes 1001 facing each other at the rear surface can be relatively small. As a result, when vibrations occur, the two outer boxes 1001 can support each other through their rear surfaces, so the middle fixing part 1162 formed on the rear horizontal beam 1110 may be unnecessary. Therefore, in such a case, the minimum number of fixing parts 1160 formed on the outer box 1001 may be five. In other words, the fixing parts 1160 of the outer box 1001 can include one middle fixing part 1162 and four corner fixing parts 1164.

[0116] On the other hand, as shown in Figure 16, if the outer box 1001 is provided alone in the installation space, or if two adjacent outer boxes 1001 are arranged so that their left or rear faces face each other, it is preferable that middle fixing parts 1162 are formed on each of the two horizontal beams 1110 so that the rear side of the outer box 1001 is stably fixed. Therefore, in such a case, the minimum number of fixing parts 1160 formed on the outer box 1001 may be six. In other words, the fixing parts 1160 can include two middle fixing parts 1162 and four corner fixing parts 1164.

[0117] The following describes the electrical connections of the battery enclosure included in the energy storage system according to this embodiment.

[0118] Figures 17 to 19 are diagrams illustrating the electrical connection structure inside the battery casing according to one embodiment of the present invention. Figure 20 is a diagram illustrating the electrical connection structure of an energy storage system according to one embodiment of the present invention.

[0119] On the other hand, in Figure 20, for convenience, the subracks 2001 are omitted from the battery rack 2000, but this does not limit the structure of the battery rack 2000 in this embodiment. Therefore, the battery rack 2000 can include two or more subracks 2001, and the first cable 3100 extending from the control panel 3000 can be connected to each subrack 2001. More specifically, the first cable 3100 can be connected to a control unit 5100 located at the upper end of the subrack 2001.

[0120] Referring to Figures 17 to 20, the battery casing 1000 in this embodiment is powered by an external electrical device, i.e., a PCS or control cabinet 4000, and may include cables 3100, 3200 for supplying power.

[0121] Cables 3100 and 3200 can transmit charging power and discharging power. Cables 3100 and 3200 can transmit charging power supplied to the battery casing 1000 and / or discharging power released from the battery casing 1000. Cables 3100 and 3200 can transmit charging power supplied to the battery rack 2000 and / or discharging power released from the battery rack 2000. Cables 3100 and 3200 can be connected to a control panel 3000 located inside the battery casing 1000. Cables 3100 and 3200 can electrically connect the control panel 3000 of the battery casing 1000 to the control cabinet 4000. Cables 3100 and 3200 can electrically connect the control panel 3000 and the battery rack 2000 within the battery casing 1000.

[0122] Cables 3100 and 3200 may include a first cable 3100 and a second cable 3200.

[0123] The first cable 3100 can be extended within the battery casing 1000 to form connections between electrical devices located inside the casing 1001. The first cable 3100 can also form an electrical connection between the control panel 3000 and the battery rack 2000.

[0124] On the other hand, the battery rack 2000 may include a control unit 5100. The control unit 5100 can be located in each row of the battery rack 2000, i.e., at the top or bottom of each subrack 2001. The batteries 5000 stacked in each row can be connected in series, and the battery 5000 located at the top or bottom of each row can be electrically connected to the control unit 5100. The control unit 5100 of the battery rack 2000 can be electrically connected to the control panel 3000 through a first cable 3100. In this way, power can be supplied to the batteries 5000 through the control unit 5100.

[0125] The control unit 5100 can 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 control cabinet 4000, etc. The BMS connected to the control unit 5100 may be referred to as a rack BMS. Here, the rack BMS may be described as being included in the control unit 5100.

[0126] Furthermore, the battery 5000 may also 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 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 battery rack 2000 may be equipped with a communication unit for information transmission and / or information reception of the rack BMS and / or battery BMS.

[0127] The first cable 3100 may include a plurality of positive electrode cables 3110 and a plurality of negative electrode cables 3120. One end of each positive electrode cable 3110 and negative electrode cable 3120 is connected to the control panel 3000, and the other end is connected to a control unit 5100 located in each row of the battery rack 2000, thereby allowing each control unit 5100 to be connected in parallel with the control panel 3000. In this way, by connecting the battery rack 2000 in parallel with the control panel 3000, if a malfunction or fire phenomenon of a particular battery 5000 is detected by the BMS, the battery rack 2000 can be electrically disconnected through the control unit 5100, thereby preventing further problems.

[0128] The first cable 3100 can be extended from one side to the other along the length direction (X-axis direction) of the outer casing 1001. In this embodiment, the first cable 3100 can be extended from the control space 1003 where the control panel 3000 is located in the direction of the power storage space 1002 where the battery rack 2000 is located. The first cable 3100 can be routed out from the top of the control panel 3000. An opening can be located on or around the top of the control panel 3000 through which the first cable 3100 passes.

[0129] The first cable 3100 can be located at the top of the outer casing 1001. The first cable 3100 extends upward from the top of the control panel 3000 and extends from one side to the other within the top of the outer casing 1001, thereby providing access to each control unit 5100 located at the top of the battery rack 2000. Here, the space to which the first cable 3100 extends for the connection between the control panel 3000 and the battery rack 2000 can be referred to as the first power distribution space 1004. The first power distribution space 1004 can be located at the top of the outer casing 1001. Considering the location of the first cable 3100, the first cable 3100 can also be referred to as a loop cable.

[0130] Conventionally, instead of the first cable 3100 in this embodiment, busbars 310 and the like were provided. Therefore, conventionally, after mainly arranging the battery rack 2000 inside the outer casing 1001, the battery rack 2000 and the busbar were electrically connected through a welding process at the top of the battery rack 2000. However, in this embodiment, since the first cable 3100 is used, welding and other processes are unnecessary, and the electrical connection can be formed more easily. In addition, by omitting other structures for insulating the busbar 310, the space inside the outer casing 1001 can be utilized more efficiently.

[0131] On the other hand, since multiple first cables 3100 extending to the battery rack 2000 are located in the first power distribution space 1004, if their positions are not arranged in advance, entanglement among the multiple first cables 3100 may occur. Furthermore, such entanglement among the first cables 3100 may cause the battery casing 1000 to catch fire or malfunction. However, the battery casing 1000 in this embodiment can be provided with a cable tray 3130 on which the first cables 3100 are placed, thereby minimizing the above-mentioned problems.

[0132] The cable tray 3130 can be located in the first power distribution space 1004. The first cable 3100 can be placed on the cable tray 3130. The first cable 3100 can be effectively organized through the cable tray 3130, thereby facilitating the maintenance and repair of the battery casing 1000.

[0133] The cable tray 3130 may have a two-tiered structure. The cable tray 3130 may include an upper tray 3131, a lower tray 3132, and brackets 3133 that support them. A positive terminal cable 3110 may be located in one of the upper tray 3131 and lower tray 3132, and a negative terminal cable 3120 may be located in the other.

[0134] One of the multiple positive cables 3110 and one of the multiple negative cables 3120 located in the cable tray 3130 can be connected to the respective battery rack 2000 or subrack 2001. Here, the multiple positive cables 3110 and / or multiple negative cables 3120 located in each tray 3131, 3132 can be positioned aligned along the depth direction (Y-axis direction) of the outer casing 1001.

[0135] Of the multiple positive terminal cables 3110 and / or multiple negative terminal cables 3120 located in a line along the depth direction (Y-axis direction), those located closer to the front (-Y-axis direction) can be connected to the battery rack 2000 or subrack 2001 that is closer to the control panel 3000. In other words, the positive terminal cable 3110 and / or negative terminal cable 3120 closest to the first door 1210 can be connected to the battery rack 2000 or subrack 2001 closest to the control panel 3000. Conversely, those located further away from the control panel 3000 can be connected to the battery rack 2000 or subrack 2001 that is further away. In other words, the positive terminal cable 3110 and / or negative terminal cable 3120 furthest from the first door 1210 can be connected to the battery rack 2000 or subrack 2001 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 subrack 2001. Therefore, if the first cable 3100 is connected to the rear of the battery rack 2000 or subrack 2001, the connection position described above may be reversed.

[0136] In this way, the positive electrode cable 3110 and the negative electrode cable 3120 are arranged vertically by the cable tray 3130, preventing interference between the first cables 3100. Furthermore, since the positions of the positive electrode cable 3110 and the negative electrode cable 3120 are predetermined, the connection between the first cables 3100 and the battery rack 2000 can be made easier.

[0137] On the other hand, although the drawing shows that the positive electrode cable 3110 is located in the upper tray 3131 and the negative electrode cable 3120 is located in the lower tray 3132, this is not necessarily the case, and the positive electrode cable 3110 may be located in the lower tray and the negative electrode cable 3120 may be located in the upper tray.

[0138] On the other hand, while the above explanation states that the positive electrode cable 3110 and the negative electrode cable 3120 are located in the upper tray 3131 and the lower tray 3132 of the cable tray 3130, respectively, this is not necessarily the case.

[0139] For example, both the positive and negative terminal cables 3110 and 3120 can be located in the upper tray 3131, and both the positive and negative terminal cables 3110 and 3120 can be located in the lower tray 3132. In such a case, the positive terminal cable 3110 can be located in one of the front or rear sides of each tray 3131, 3132, and the negative terminal cable 3120 can be located in the other side. Furthermore, the positive and negative terminal cables 3110 and 3120 located in the upper tray 3131 can be connected to battery racks 2000 or subracks 2001 located at relatively far or near distances, and the positive and negative terminal cables 3110 and 3120 located in the lower tray 3132 can be connected to battery racks 2000 or subracks 2001 located at relatively near or far distances.

[0140] Referring further to Figure 20, if the energy storage system 1 of this embodiment includes two or more battery enclosures 1000, the control cabinet 4000 can be connected in parallel with the multiple battery enclosures 1000. In other words, each battery enclosure 1000 can be individually connected to the control cabinet 4000.

[0141] On the other hand, in the conventional structure, the control cabinet 4000 was connected in series with multiple battery casings 1000. In the conventional structure, the control cabinet 4000 was connected to one of the battery casings 1000, the battery casing 1000 connected to the control cabinet 4000 was connected to an adjacent battery casing 1000, and the connected battery casings 1000 were further connected to an adjacent battery casing 1000, thereby forming an electrical connection within the energy storage system 1.

[0142] However, the electrical connections between the battery casings 1000 must be formed after all the battery casings 1000 have been fixed to the mounting surface, which increases installation time and complexity. Furthermore, the connections between the battery casings 1000 are mainly formed in the upper area close to the ceiling, but it is not easy for workers to work in the upper area of ​​the battery casings 1000, resulting in high fatigue and difficulty of the work. In addition, the battery casings 1000 also need to be equipped with separate communication connection structures or power connection structures, and such connection structures can be formed mainly in the lower area close to the bottom surface of the battery casings 1000. Therefore, in the conventional structure, workers had to perform additional work on the ceiling area in addition to the work on the bottom part of the battery casings 1000, which was cumbersome.

[0143] Furthermore, because the battery casing 1000 is large and very heavy, it is not easy to move it once it has been positioned. Therefore, connecting multiple battery casings 1000 on-site requires not only detailed process design and a high level of skill from the workers, but also a significant amount of time and expense. However, in reality, the battery casings 1000 are not easily positioned precisely in predetermined locations, which may result in inconsistent spacing between the installed battery casings 1000. When the spacing between battery casings 1000 is inconsistent in this way, forming connections between adjacent battery casings 1000 may become even more difficult.

[0144] Furthermore, conventional battery casings could have a structure in which the busbar 310 or a conductive member connected to the busbar 310 penetrated the casing and extended to the outside. Consequently, an opening was formed at the top of the battery casing 1000, which presented the problem of difficulty in completely sealing the casing.

[0145] However, the energy storage system 1 of this embodiment can solve the above-mentioned problems by forming the electrical connection between the devices in parallel rather than in series. The battery casing 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. Furthermore, since each battery casing 1000 is connected in parallel to the control cabinet 4000, if an abnormal phenomenon occurs in one of the multiple battery casings 1000, it can be quickly disconnected from or removed from the control cabinet 4000, making power management easier.

[0146] Furthermore, in this embodiment, a direct electrical connection does not need to be formed between two adjacent battery casings 1000. This means that, conventionally, the busbar 310 or the component connected thereto had to be exposed to the outside of the casing 1001, but in this embodiment, the first cable 3100 does not need to be exposed to the outside. This complements the airtightness of the casing 1001 and makes it easier to manage the casing 1001.

[0147] On the other hand, the second cable 3200 may be for connecting the battery casing 1000 to an external electrical device. The second cable 3200 can form an electrical connection between the battery casing 1000 and the control cabinet 4000. The second cable 3200 can be extended to the outside from one side of the battery casing 1000. The second cable 3200 can be extended from the external device to one side of the battery casing 1000.

[0148] The second cable 3200 may include a positive electrode cable 3210 and a negative electrode cable 3220. One end of each positive electrode cable 3210 and negative electrode cable 3220 is connected to the control cabinet 4000, and the other end is connected to the control panel 3000 of the battery casing 1000, thereby allowing each battery casing 1000 to be connected in parallel with the control cabinet 4000. There may be multiple positive electrode cables 3210 and negative electrode cables 3220 included in the second cable 3200. Each positive electrode cable 3210 and negative electrode cable 3220 can be connected to one battery casing 1000.

[0149] At least a portion of the second cable 3200 can be located at the bottom of the outer casing 1001. The second cable 3200 can extend downward from one side of the control cabinet 4000, then extend toward the battery outer casing 1000 on the underside of the mounting surface, and further extend upward to access the control panel 3000 inside the battery outer casing 1000. The second cable 3200 can be routed into the bottom of the control panel 3000. An opening can be located at or around the bottom of the control panel 3000 through which the second cable 3200 passes. Here, the space through which the second cable 3200 extends for the connection between the control panel 3000 and the control cabinet 4000 can be referred to as the second power distribution space 1005. The second power distribution space 1005 can include at least a portion of the bottom of the outer casing 1001. In this way, the second cable 3200 can be protected from the external environment by extending from the underside of the mounting surface. Considering the location of the second cable 3200, the second cable 3200 may also be referred to as the ground cable.

[0150] Figure 21 is an enlarged view of one side of the outer casing included in the battery outer casing according to Figure 2. Figures 22 and 23 are exploded perspective views of the closing unit that closes the opening of the battery outer casing according to Figure 2. Figure 24 is a modified example of the closing unit according to Figure 23. Figure 25 is a drawing comparing the connection between battery outer casings according to one embodiment of the present invention with the prior art.

[0151] Referring to Figures 21 to 25, the battery casing 1000 in this embodiment may include openings 1170 and 1180 through which the second cable 3200 passes.

[0152] The openings 1170 and 1180 may be for communicating the inside and outside of the battery casing 1000. The openings 1170 and 1180 may be for a second cable 3200 connecting the control panel 3000 and the control cabinet 4000. The openings 1170 and 1180 can be located close to the control panel 3000 to which the second cable 3200 is connected. The openings 1170 and 1180 may be for communicating the control space 1003 and the second power distribution space 1005. The openings 1170 and 1180 can be located in the control space 1003 or the second power distribution space 1005. Alternatively, the openings 1170 and 1180 can be located between the control space 1003 and the second power distribution space 1005.

[0153] The openings 1170 and 1180 may include a first opening 1170 and a second opening 1180. The first opening 1170 may be located on one side of the outer casing 1001, and the second opening 1180 may be located on the other side of the outer casing 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 1180 may be located on the second side of the control space 1003, perpendicular to the first side. Specifically, the first opening 1170 may be formed on the bottom surface of the outer casing 1001, i.e., the base 1100. The second opening 1180 may be formed on the side surface of the outer casing 1001, i.e., the front or rear surface. Here, the first opening 1170 or the second opening 1180 may be one or more. When there are two or more, the degree of flexibility when connecting the second cable 3200 to the control panel 3000 can be further increased. For example, the positive cable 3210 and negative cable 3220 of the second cable 3200 can be individually routed into or out of the two first openings 1170.

[0154] On the other hand, as shown in Figure 25, a conventional battery casing 1000 also includes such an opening 117. However, in conventional structures such as those in Prior Art 2, the control panel 3000 of the battery casing 1000, or a similar configuration, is located in the center, which limits the location and number of openings. For example, in conventional structures, the opening 117 can only be formed on the bottom surface of the casing 1001, and structures like the second opening 1180 in this embodiment, which is located on the front or rear surface of the casing 1001, cannot be formed.

[0155] Furthermore, since the second cable 3200 must bend in order to connect to the battery casing 1000, the second cable 3200 can have curvature. However, if the location and number of openings are limited, the curvature value of the second cable 3200 may be greatly affected by the installation environment, which may cause malfunction of the battery casing 1001 or breakage of the second cable 3200.

[0156] However, in this embodiment, since the control panel 3000 is located on one side of the battery casing 1000, openings 1170 and 1180 can be formed on different surfaces of the casing 1001. With multiple openings 1170 and 1180, the worker can select one of the first opening 1170 and the second opening 1180 to place the second cable 3200 when installing the battery casing 1000. As a result, the installation efficiency of the worker can be increased in this embodiment compared to the conventional structure. In addition, the curvature of the second cable 3200 can be changed depending on the position of the opening 1170 and 1180 selected by the worker, thereby preventing breakage of the second cable 3200.

[0157] On the other hand, in this embodiment, it is preferable that multiple openings 1170 and 1180 are formed so that any unused openings 1170 and 1180 are sealed after the installation of the battery casing 1000 is complete. Therefore, the battery casing 1000 in 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.

[0158] As shown in Figure 22, boxes 1172 and 1173 can be located in the first opening 1170. Boxes 1172 and 1173 may be for protecting the second cable 3200 that passes through the first opening 1170. Boxes 1172 and 1173 may have a rectangular tubular shape, and the second cable 3200 can be protected from the external environment by positioning each side of boxes 1172 and 1173 to surround the second cable 3200.

[0159] Boxes 1172 and 1173 may include a first box 1172 and a second box 1173. However, it is also possible that only one of the first box 1172 and the second box 1173 is provided.

[0160] On the other hand, boxes 1172 and 1173 do not have to be part of the configuration included in the first closing unit 1171. That is, boxes 1172 and 1173 may be part of the configuration included in the base 1100 of the outer casing 1001 and may be provided coupled to the periphery of the first opening 1170. Therefore, even when the second cable 3200 passes through the first opening 1170 due to the use of the first opening 1170, boxes 1172 and 1173 can be located within the first opening 1170.

[0161] Here, boxes 1172 and 1173 may include four faces that form a rectangular tubular shape. Alternatively, depending on the design, boxes 1172 and 1173 may have a configuration in which five faces are closed in addition to one face corresponding to the opening. In such cases, when the battery casing 1000 is installed, holes may be formed in boxes 1172 and 1173 for the passage of the second cable 3200.

[0162] However, depending on the embodiment, boxes 1172 and 1173 do not have to be included in the base 1100. Boxes 1172 and 1173 may be provided for a stable seal of the first opening 1170 and may be included in the first closing unit 1171. Also, depending on the embodiment, only the first box 1172 may be provided in the outer casing 1001, and the second box 1173 may be provided selectively. In such a case, the second box 1173 may be for preventing a gap between the first box 1172 and the first closing unit 1171, and the second box 1173 may be included in the first closing unit 1171.

[0163] The first closing unit 1171 may also be for sealing the first opening 1170. The first closing unit 1171 may include insulation 1175, a sealing pad 1176, and a first cover 1177. Also, as described above, the first closing unit 1171 may include one or both of the first box 1172 and the second box 1173.

[0164] The insulation material 1175 may be for sealing the internal space of boxes 1172 and 1173. The insulation material 1175 may be for preventing condensation that may occur due to the temperature difference between the inside and outside space of the outer box 1001. The insulation material 1175 can be manufactured from a material with low thermal conductivity.

[0165] The sealing pad 1176 may be for improving the sealing level of the first opening 1170. The sealing pad 1176 can be located between one surface of the base 1100 on which the first opening 1170 is formed and the first cover 1177. The sealing pad 1176 can be provided to cover a predetermined peripheral area that extends radially from the periphery of the first opening 1170. The sealing pad 1176 can be configured to ensure that no gap is formed around the first closing unit 1171 by bringing the periphery of the first opening 1170 and the first cover 1177 into close contact. For this reason, the sealing pad 1176 can be manufactured from an elastic material.

[0166] The first cover 1177 may be for closing one side of the first opening 1170. The first cover 1177 can cover the first opening 1170 on one surface of the base 1100. The size of the first cover 1177 may be larger than the size of the first opening 1170.

[0167] The first closing unit 1171 can be connected to the base 1100 through fastening members such as bolts. Specifically, for example, after the first closing unit 1171 is positioned on the first opening 1170, the first cover 1177 and the base 1100 can be connected by inserting bolts into the periphery of the first cover 1177.

[0168] The second closing unit 1181 may be for sealing the second opening 1180. The second closing unit 1181 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 explained by the contents of the insulating material 1175 and the first cover 1177 of the first closing unit 1171, so a detailed explanation is omitted.

[0169] Furthermore, as shown in Figure 23, a third box 1182 can be provided in the second opening 1180. Since the details of the third box 1182 overlap with those of boxes 1172 and 1173 described above, a detailed explanation will be omitted. As mentioned above, the third box 1182 may be included in the base 1100 of the outer casing 1001, or it may be included in the second closing unit 1181.

[0170] On the other hand, the drawings show that the second closing unit 1181 does not include a configuration such as the sealing pad 1176 included in the first closing unit 1171. However, this is not necessarily the case, and the second closing unit 1181 may be provided with a structure similar to the sealing pad 1176.

[0171] Since the second opening 1180 is located on the front or rear of the outer casing 1001, it is preferable that it be more completely sealed than the first opening 1170. For this reason, a second outer cover 1189 can be located outside the second cover 1187. The second outer cover 1189 can be integrated with the outer casing 1001 by being made of the same or similar material as one side of the outer casing 1001. By providing the second outer cover 1189 to the second opening 1180 in this way, the second opening 1180 can be sealed more stably. Furthermore, depending on the design, such an outer cover may also be provided for the first opening 1170.

[0172] On the other hand, even when the first opening 1170 or the second opening 1180 is used, it is preferable that the areas of the openings 1170 and 1180 other than the space where the second cable 3200 is located are closed in order to seal the outer casing 1001. Therefore, even when the first opening 1170 or the second opening 1180 is used, all or part of the configuration of the first closing unit 1171 and the second closing unit 1181 can be located in the first opening 1170 or the second opening 1180.

[0173] In addition, the openings 1170 and 1180, which are in use in this manner, may also be provided with additional configurations such as a second external cover 1189, in addition to the closing units 1171 and 1181.

[0174] As shown in Figure 24, when the second opening 1180 is used, the second external cover 1189 may include a conduit 1188 that guides the position of the second cable 3200. The conduit 1188 can guide the second cable 3200, which is located outside the outer casing 1001, downwards. The second cable 3200 can be protected through the conduit 1188, and the second opening 1180 can be effectively sealed. Although not specifically described, a first external cover may also be provided when the first opening 1170 is used, and the first external cover may also include a conduit or a similar structure.

[0175] The dimensions of the battery casing according to this embodiment will be described below.

[0176] In conventional battery enclosures 1000, the enclosure 1001 primarily used standard 20-foot or 40-foot enclosures. However, there are limitations to adjusting the size of the battery racks 2000 and control panels 3000 included in the battery enclosure 1000, which can result in a high proportion of dead space even with optimized internal configuration. Therefore, in this embodiment, the battery enclosure 1000 can utilize a separately designed enclosure 1001 in addition to a standardized enclosure.

[0177] More specifically, if the product is distributed in units of 1000 battery boxes, minimizing the volume and weight of the box 1001 can be advantageous from a transportation standpoint. Furthermore, minimizing the volume and weight of the box 1001 while simultaneously maximizing the number of batteries 5000 installed inside can increase energy density, which can be advantageous from a power capacity standpoint.

[0178] As a result, in this embodiment, the length value LT, depth value DT, and height value HT of the outer casing 1001 were reduced by minimizing dead space through optimization of the internal space.

[0179] Firstly, in this embodiment, the control panel 3000 is rotated 90 degrees and positioned so that the size of the control panel 3000 on the outer casing 1001 in the longitudinal direction (X-axis direction) is minimized, thereby minimizing the length value LT of the outer casing 1001.

[0180] Secondly, by providing the air conditioner 1300 in a configuration that is coupled to the door 1200, the depth value DT of the outer casing 1001 can be minimized.

[0181] Third, in this embodiment, the battery casing 1000 employs cables 3100 and 3200 instead of busbars 310 as conductive members for electrical connection. This eliminates the need for the insulation and fixing structure of the busbars 310, and minimizes the specific gravity occupied by the power distribution structure in the height value LT of the casing 1001.

[0182] The following provides more specific examples of the dimensions of the outer casing 1001. The dimensions of the outer casing 1001 described below can be explained based on the size of the battery 5000. For convenience of explanation, the size of the battery 5000 on the X axis can be referred to as BLT, the size on the Y axis as BDT, and the size on the Z axis as BHT.

[0183] 1) Length value LT The length value LT of the outer box 1001 can be expressed as follows:

[0184] (LT) = [Size occupied by power storage space 1002] + [Size occupied by the skeletal structure of the outer casing 1001] + [Size occupied by control space 1003] ... Equation (1) In this embodiment, a battery rack 2000 is located in the power storage space 1002, and the battery rack 2000 may include batteries 5000 arranged in rows on each subrack 2001. Therefore, the size occupied by the power storage space 1002 in the longitudinal direction (X-axis direction) can be described as follows.

[0185] [Size occupied by power storage space 1002] = [(BLT) * (Number of columns included in all battery racks 2000) * (A1)] ... Equation (1-1) Here, the number of rows containing the battery rack 2000 can represent the total number of batteries 5000 that can be arranged along the length of the outer casing 1001. The number of rows contained in the battery rack 2000 can be 10 or more. Preferably, the number of rows contained in the battery rack 2000 can be 10 or more and 12 or less.

[0186] Here, the separation space compensation value A1 can be a weighted value that takes into account not only the length value BLT of the battery 5000, but also the thickness of the columns 2100, 2200, etc. of the battery rack 2000, and the separation distance between the battery racks 2000. Such separation distances and frame thicknesses can be proportional to the total number of columns formed in all the battery racks 2000. Therefore, in equation (1-1), the size of the power storage space 1002 in the length direction (X-axis direction) can be calculated by applying the weighted separation space compensation value A1 to the length of the battery 5000 and the total number of columns included in all the battery racks 2000.

[0187] The separation space compensation value A1 can be selected from 1.1 to 1.5. Specifically, for example, when the length value BLT of 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).

[0188] Furthermore, the outer casing 1001 may include external structures such as the main column 1190, in addition to the power storage space 1002 containing the battery rack 2000 and the control space 1003 containing the control panel 3000. Therefore, when calculating the length value LT of the outer casing 1001, the value for the skeletal structure must be taken into consideration.

[0189] [Size occupied by the skeletal structure of outer box 1001] = (BLT) * (B1) ... Equation (1-2) Here, the external structure compensation value B1 can be a weighted value that takes into account the skeletal structure, such as the main column 1190 and other columns. The size occupied by the external structure in the length direction (X-axis direction) can be expressed relative to the BLT and can be calculated by multiplying the BLT by B1.

[0190] The external structure compensation value B1 can be selected from 0.6 to 1.4. Specifically, for example, when the length value BLT of battery 5000 is 400 cm, the size occupied by the external structure in the length direction (X-axis direction) can be (400 cm) * (0.6) to (400 cm) * (1.4).

[0191] On the other hand, the size of the control space 1003 in the length direction (X-axis direction) can be expressed based on the length value BLT of the battery 5000, as follows. In this case, the control space 1003 may include the control panel 3000 and other spaces.

[0192] [Size occupied by control space 1003] = (BLT) * (E1) ... Equation (1-3) Here, the spatial compensation value E1 is used to express the size of the control space 1003, where other electrical components are located in addition to the control panel 3000, based on the length value BLT of the battery 5000. E1 can be selected from 1.2 to 2.0. In this case, when compared to the size of a normal control panel 3000, the smaller the E1 value applied in equation (1-3) is because the control panel 3000 in this embodiment is positioned to face either the left or right side of the outer casing 1001.

[0193] Therefore, the length value according to this embodiment can be expressed as follows.

[0194] (LT)=[(BLT)*{(Number of columns included in all battery racks)*(A1)+(B1)+(E1)}]...Equation (1-4) 2) Height value HT On the other hand, the height value HT of the outer box 1001 can be expressed as follows:

[0195] (HT) = [size occupied by the battery rack 2000 in the height direction] + [size occupied by the skeletal structure of the outer casing 1001] + [size of the first power distribution space 1004 required for the placement of the first cable 3100] ... Equation (2) Here, the height of the battery rack 2000 can be proportional to the number of batteries 5000 that can be stacked on the battery rack 2000. Furthermore, since the battery rack 2000 includes the control unit 5100, this also needs to be taken into consideration.

[0196] Therefore, the size that the battery rack 2000 occupies in the height direction (Z-axis direction) can be described as follows:

[0197] [The size occupied by the battery rack 2000 in the height direction] = [(BHT) * {Maximum number of batteries 5000 that can be installed in one row) + 1} * (A2)] ... Equation (2-1) Here, the maximum number of batteries 5000 that can be mounted in one row can mean the total number of batteries 5000 that can be arranged in the height direction of the outer casing 1001. Adding 1 to the maximum number of batteries 5000 that can be mounted in the battery rack 2000 takes the control unit 5100 into consideration. The maximum number of batteries 5000 that can be stacked in a row of the battery rack 2000 can be 16 or more. Preferably, the maximum number of batteries 5000 that can be stacked in a row of the battery rack 2000 can be 16 or more and 18 or less.

[0198] Here, the separation space compensation value A2 can be a weighted value that takes into account not only the height value BHT of the battery 5000, but also the structure of the battery rack 2000 and the resulting separation distance between the batteries 5000. The separation space compensation value A2 can be selected from 1.0 to 1.3.

[0199] Furthermore, values ​​for skeletal structures such as the base 1100 of the outer casing 1001 can be expressed based on the height value BHT of the battery 5000, as shown below.

[0200] [Size occupied by the skeletal structure of outer box 1001] = (BHT) * (B2) ... Equation (2-2) Here, B2 can be anywhere from 2 to 4.

[0201] Furthermore, the size of the first power distribution space 1004 can be expressed as follows, based on the height value BHT of the battery 5000.

[0202] (Size of the first power distribution space 1004) = (BHT) * (E2) ... Equation (2-3) Here, the spatial compensation value E2 may be used to express the size of the first power distribution space 1004 based on the height value BHT of the battery 5000.

[0203] E2 can be selected from 1 to 3.

[0204] Therefore, the height value HT of the outer box 1001 can be expressed as follows.

[0205] HT = [(BHT) * [{(Maximum number of batteries that can be installed in one column, 5000) + 1} * (A2) + (B2) + (E2)]] ... Equation (2-4) 3) Depth value DT On the other hand, the depth value DT of the outer box 1001 can be expressed as follows:

[0206] (DT) = [size occupied by the battery rack 2000 in the depth direction] + [skeletal structure including air conditioner 1300, etc.] ... Equation (3) Here, the size that the battery rack 2000 occupies in the depth direction (Y-axis direction) can be described as follows.

[0207] [Size occupied by Battery Rack 2000 in the depth direction] = (BDT) * (Number of rows contained in Battery Rack 2000) * (A3) ... Equation (3-1) Here, the number of rows containing the battery rack 2000 can represent the total number of batteries 5000 that can be arranged in the depth direction of the outer casing 1001. The number of rows containing the battery rack 2000 may be 1 or 2, preferably 1.

[0208] Here, the separation space compensation value A3 can be a weighted value that takes into account not only the depth value BDT of the battery 5000, but also the thickness of the columns 2100 and 2200 of the battery rack 2000, and the separation distance between the battery rack 2000 and the outer casing 1001. The separation space compensation value A3 can be between 1.0 and 1.1.

[0209] Furthermore, the size occupied by the skeletal structure, such as the air conditioner 1300, can be expressed as follows:

[0210] [Size occupied by the skeletal structure of the air conditioner 1300, etc.] = (BDT) * (B3) ... Equation (3-2) Here, B3 may represent the size occupied by structures other than the battery 5000 in the depth direction (Y-axis direction) using the depth value BDT of the battery 5000. B3 can be between 0.2 and 0.8.

[0211] Therefore, the depth value DT of the outer box 1001 can be expressed as follows.

[0212] (DT)=[(BDT)*(Number of rows included in Battery Rack 2000)*(A3)+(B3)]...Equation (3-3) On the other hand, the dimensions of a 20-foot or 40-foot outer casing used in a typical energy storage system 1 are as follows:

[0213] 20-foot outer box: 6,096mm (20ft) x 2,438mm (8ft) x 2,590mm (8ft 6inch) 40-foot outer box: 12,192mm (20ft) x 2,438mm (8ft) x 2,590mm (8ft 6inch) 20-foot HC outer box: 6,096mm (20ft) x 2,438mm (8ft) x 2,895mm (9ft 6inch) 40-foot HC outer box: 12,192mm (20ft) x 2,438mm (8ft) x 2,895mm (9ft 6inch) In the following, the four values ​​mentioned above will be referred to as "standard outer box values." Furthermore, these four values ​​may be categorized and referred to as either "20-foot standard outer box" or "40-foot standard outer box" depending on their length. Therefore, "20-foot standard outer box" or "40-foot standard outer box" can be interpreted as encompassing both general and HC standards.

[0214] On the other hand, the dimensions of the outer casing 1001 in this embodiment can have the following values.

[0215] 6,096mm ≤ LT ≤ 8,696mm 1,638mm ≤ DT ≤ 2,438mm 2,390mm ≤ HT ≤ 3,490mm Here, the larger the length value LT, the more batteries 5000 can be loaded into the outer casing 1001. Therefore, if the length value LT of the outer casing 1001 is less than 6,096 mm, the power capacity of the battery outer casing 1000 may not be sufficient. Also, if the length value LT of the outer casing 1001 exceeds 8,696 mm, although more batteries 5000 can be loaded, the volume and weight of the outer casing 1001 will increase excessively, leading to increased shipping costs.

[0216] Here, the smaller the depth value DT, the smaller the volume of the outer casing 1001 may be. This is because a larger amount of space is lost when the depth value DT is reduced than when the length value LT and height value HT are reduced. Therefore, in the outer casing 1001 used for the battery outer casing 1000, a smaller depth value DT is advantageous. Thus, the outer casing 1001 in this embodiment can have a depth value that is the same as or smaller than the standard outer casing value, but if the depth value DT is less than 1,638 mm, it may be difficult to load the battery 5000. Therefore, it is preferable that the depth value DT is between 1,638 mm and 2,438 mm.

[0217] Here, the larger the height value HT, the more batteries 5000 can be stacked vertically, and the more sufficient upper space is formed, making it easier to establish electrical connections inside the battery casing 1000. Therefore, if the height value HT of the casing 1001 is less than 2,390 mm, there is a problem in that it is difficult to establish electrical connections inside the battery casing 1000 or the number of batteries 5000 that can be stacked is limited.

[0218] However, if the height value HT is excessively large, the overall volume of the outer casing 1001 increases, which can increase transportation costs. Furthermore, if the height value HT is excessively large, it may be difficult to vertically stack the battery outer casings 1000 within the transport space during transport, which can lead to increased transportation costs. Considering these points, it is preferable that the height value HT of the outer casing 1001 be similar to the standard outer casing value, and if the height value HT of the outer casing 1001 exceeds 3,490 mm, transportation costs may increase excessively as described above.

[0219] When comparing the outer casing 1001 of this embodiment with the values ​​of a 20-foot or 40-foot outer casing, the depth value DT of the outer casing 1001 of this embodiment can be the same as or smaller than that of a standard outer casing.

[0220] In the outer box 1001, the front and rear surfaces can have a larger area than the other surfaces of the outer box 1001, thereby effectively reducing the volume of the outer box 1001 by reducing the depth value DT. Thus, by reducing the depth value DT compared to conventional outer boxes, the outer box 1001 of this embodiment can have the same or a smaller volume than a standard 20-foot or 40-foot outer box.

[0221] Furthermore, the length value LT of the outer casing 1001 in this embodiment can be the same as or greater than that of a 20-foot outer casing, and smaller than that of a 40-foot outer casing. Since the depth value DT of the outer casing 1001 in this embodiment is reduced compared to conventional casings, even if the length value LT increases, it can have the same or smaller volume value compared to a conventional 20-foot outer casing. Therefore, compared to a conventional outer casing with the same volume, the outer casing 1001 in this embodiment can accommodate a larger number of batteries 5000.

[0222] Thus, by including an optimized standard outer casing 1001, the battery casing 1000 of this embodiment can accommodate a larger number of batteries 5000 in the same space, thereby achieving a reduction in transportation costs.

[0223] Although 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 by those skilled in the art that utilize the basic concepts of the present invention as defined in the following claims also fall within the scope of the present invention. [Explanation of Symbols]

[0224] 1000: Battery outer box 1001: Outer box 1002: Power storage space 1003: Control Space 1004: First power distribution space 1005: Second power distribution space 1100: Bass 1200: Door 1300:Air conditioner 2000: Battery Rack 2001: Subrack 3000: Control Panel 3100: First cable 3130: Cable Tray 3200: Second cable 4000: Control Cabinet 5000: Battery 5100: Control Unit

Claims

1. An outer box having an internal storage space, A battery rack, which includes at least one battery, is fixed in the storage space inside the outer box. The battery rack includes a control panel that is electrically connected to it. The aforementioned storage space includes a power storage space in which the battery rack is located and a control space in which the control panel is located. The battery casing has multiple openings formed on different surfaces, through which cables pass.

2. The battery casing according to claim 1, wherein the cable is connected to the control panel.

3. The battery outer casing according to claim 2, wherein the opening is located on one side in the longitudinal direction of the outer casing.

4. An external cover is located in the aforementioned opening. The battery casing according to claim 2, wherein the external cover includes a conduit for guiding a cable connected to the control panel downwards.

5. The plurality of openings include a first opening and a second opening, The first opening is formed on the first surface of the control space, The second opening is formed on the second surface of the control space, The battery casing according to claim 1 or 2, wherein the first surface and the second surface are perpendicular to each other.

6. The first opening is formed in the base of the outer box, The battery casing according to claim 5, wherein the second opening is formed on the front or rear surface of the casing.

7. The battery casing according to claim 5, wherein at least one of the first opening and the second opening is two or more.

8. The battery casing according to claim 5, wherein at least one of the first opening and the second opening is closed by a closing unit.

9. The battery casing according to claim 8, wherein the closing unit includes a cover that covers the opening and an insulating material for filling the opening.

10. The battery casing according to claim 9, wherein a sealing pad is positioned between the periphery of the opening and one surface of the cover.

11. The power storage space is opened and closed through the first door, and the control space is opened and closed through the second door. The battery enclosure according to claim 1 or 2, wherein the direction in which the first door opens and the direction in which the second door opens are perpendicular to each other.

12. An energy storage system comprising a battery enclosure according to claim 1 or 2.

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