Energy storage system

Abstract

An energy storage system includes: a housing having an internal space accommodating one or more battery modules and at least one open side; a first door and a second door disposed adjacent to each other at the at least one open side of the housing; a connection unit having a first end connected to the first door and a second end connected to the second door; and a sealing unit fastened to the connecting unit and disposed between the first door and the second door.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2024-0133077, filed on September 30, 2024, with the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. Technical Field

[0003] An aspect of the embodiments of this disclosure relates to an energy storage system. Background Technology

[0004] An energy storage system (ESS) is a system that stores large amounts of electrical energy and then supplies the stored energy when needed to improve energy efficiency.

[0005] Generally, an ESS (Energy Safe) can include a battery system, a battery management system (BMS) that manages the battery system (such as monitoring the voltage, current, and temperature of the battery system), a power conversion system (PCS) that performs AC-DC conversion and distribution functions, and an energy management system (EMS) that controls the energy flow of the ESS and provides comprehensive control over the entire ESS system (such as collecting and managing information about the ESS's status). Additionally, a battery system can include multiple battery racks electrically connected to each other. Each battery rack can include multiple battery modules electrically connected to each other, and each battery module can include multiple battery cells electrically connected to each other.

[0006] Energy storage systems can include multiple battery modules, therefore, a structure that facilitates installation and management and improves space efficiency is required. Furthermore, the multiple battery modules installed within an energy storage system may pose a risk of explosion and fire; therefore, a structure capable of releasing pressure in the event of a battery explosion is necessary.

[0007] The information provided above in the context of the art that forms the background of this disclosure is provided to enhance understanding of the background of this disclosure, and may therefore also include information that does not constitute related art. Summary of the Invention

[0008] According to one aspect of the embodiments of this disclosure, an energy storage system with improved battery performance, space efficiency, and structural stability is provided.

[0009] However, the aspects and problems to be solved by this disclosure are not limited to those mentioned above, and other aspects, problems to be solved, and advantages of this disclosure not mentioned can be understood from the following description and will be more clearly understood through embodiments. Furthermore, it should be understood that the aspects, problems to be solved, and advantages of this disclosure can be achieved by means defined by the claims and combinations thereof.

[0010] According to one or more embodiments, an energy storage system includes: a housing having an internal space for accommodating one or more battery modules and at least one open side; a first door and a second door arranged adjacent to each other at at least one open side of the housing; a connecting unit having a first end connected to the first door and a second end connected to the second door; and a sealing unit fastened to the connecting unit and arranged between the first door and the second door.

[0011] The connecting unit may include: a rotating member fastened to a first door and including a rotating shaft; and a supporting member fastened to a second door and including a mounting groove in which the rotating shaft is mounted.

[0012] The sealing unit may include a sealing member disposed between the mutually facing surfaces of the first door and the second door.

[0013] The first end of the sealing member can be disposed between the surfaces of the first door and the second door that face each other, and the second end of the sealing member can be disposed to protrude from the outer surfaces of the first door and the second door.

[0014] The first end of the sealing member may include a first sealing portion extending toward the first door and the second door.

[0015] The first sealing portion may have a shape in which the thickness decreases toward the first door and the second door.

[0016] The second end of the sealing member may include a second sealing portion that protrudes to overlap with the outer surfaces of the first and second doors.

[0017] The sealing member may include a first mounting groove having a shape corresponding to the first door and a second mounting groove having a shape corresponding to the second door.

[0018] The sealing unit may further include a central member arranged to be surrounded by the sealing member, and the energy storage system may further include a fixing unit arranged between the connecting unit and the central member and having a shape corresponding to the central member.

[0019] According to one or more embodiments, an energy storage system includes: a housing having an internal space for accommodating one or more battery modules and at least one open side; a first door and a second door arranged adjacent to each other at at least one open side of the housing; and a sealing unit disposed between the first door and the second door, wherein the sealing unit includes a sealing member arranged to move along the surfaces of the first door and the second door that face each other.

[0020] The energy storage system may further include a connection unit having a first end connected to a first door and a second end connected to a second door, wherein a sealing unit is fastened to the connection unit.

[0021] The connecting unit may include: a rotating member fastened to a first door and including a rotating shaft; and a supporting member fastened to a second door and including a mounting groove in which the rotating shaft is mounted.

[0022] The first end of the sealing member can be disposed between the surfaces of the first door and the second door that face each other, and the second end of the sealing member can be disposed to protrude from the outer surfaces of the first door and the second door.

[0023] The first end of the sealing member may include a first sealing portion extending toward the first door and the second door.

[0024] The first sealing portion may have a shape in which the thickness decreases toward the first door and the second door.

[0025] The second end of the sealing member may include a second sealing portion that protrudes to overlap with the outer surfaces of the first and second doors.

[0026] The sealing member may include a first mounting groove having a shape corresponding to the first door and a second mounting groove having a shape corresponding to the second door.

[0027] The sealing unit may further include a central member arranged to be surrounded by the sealing member, and the energy storage system may further include a guiding unit arranged between the connecting unit and the central member and having a shape corresponding to the central member.

[0028] The guiding unit may include a first guiding portion configured to guide the fastening position of the central member to a first position and a second guiding portion configured to guide the fastening position to a second position.

[0029] When the central member is in the first position, there may be a first fastening gap between the first guide portion and the central member. When the central member is in the second position, there may be a second fastening gap between the second guide portion and the central member. The first fastening gap may be greater than the second fastening gap.

[0030] Other aspects, features, and advantages besides those described above will become apparent from the accompanying drawings, claims, and the following detailed description of this disclosure. Attached Figure Description

[0031] The accompanying drawings illustrate some embodiments and are provided, together with the detailed description of this disclosure below, to further understand the spirit of this disclosure; however, this disclosure should not be construed as limited to the example drawings:

[0032] Figure 1This is a schematic side view illustrating an example of an energy storage system according to an embodiment;

[0033] Figure 2 It is a schematic diagram. Figure 1 A partial perspective view of area "A";

[0034] Figure 3 It is a schematic diagram. Figure 2 A partial perspective view of the fastening of the sealing unit and the fixing unit;

[0035] Figure 4 This is a schematic side view illustrating an example of an energy storage system according to an embodiment;

[0036] Figure 5 This is a schematic diagram illustrating the state under normal conditions. Figure 4 A partial perspective view of area "B";

[0037] Figure 6 It is a schematic diagram illustrating the occurrence of an event. Figure 4 A partial perspective view of area "B";

[0038] Figure 7 It is a schematic plan view illustrating the movement of the sealing component;

[0039] Figure 8 This is a perspective view that schematically illustrates an example of a guide unit;

[0040] Figure 9 It is a schematic partial perspective view illustrating the fastening of the guide unit and the central component in the normal state;

[0041] Figure 10 It is a schematic diagram. Figure 9 Cross-sectional views of the guiding unit and the central component;

[0042] Figure 11 It is a schematic partial perspective view illustrating the fastening of the guide unit and central component when an event occurs; and

[0043] Figure 12 It is a schematic diagram. Figure 11 Cross-sectional view of the guiding unit and the central component. Detailed Implementation

[0044] While some embodiments have been described herein, this disclosure can be modified in various ways and has various embodiments; therefore, the specific embodiments illustrated in the accompanying drawings and described in the detailed description are provided as examples. However, this is not intended to limit this disclosure to the specific embodiments, but should be understood to include all modifications, equivalents, or alternatives included within the spirit and scope of this disclosure. In describing this disclosure, detailed descriptions of related known techniques that might obscure the subject matter may be omitted.

[0045] Although the terms "first," "second," etc., are used to describe various components, these components are not limited by these terms. These terms are used to distinguish one component from another, and unless otherwise specifically stated, a first component can also be a second component.

[0046] The terminology used herein is for describing particular embodiments and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular forms are intended to include the plural forms as well. In the accompanying drawings, for convenience and clarity of description, parts may be exaggerated, omitted, or illustrated schematically, and the dimensions of each part may not perfectly reflect actual dimensions.

[0047] When a component is described as being formed on or under another component, the terms “on” and “under” include the case where the component is formed directly on the other component and the case where there are one or more intervening components between them, and the standard for the terms “on” and “under” is based on the accompanying drawings.

[0048] The phrase “any component arranged “above (or below) a component” or “on (or below) a component” can mean that any component is arranged to contact the upper (or lower) surface of the component and that one or more other components may be located between the component and any component arranged on (or below) the component.

[0049] It should also be understood that when a component is described as being "connected to," "combined with," or "attached to" another component, these components may be directly connected or linked to each other, or one or more other components may be "between" the components, or the components may be "connected," "combined," or "connected" to each other through another component. Furthermore, when a component is electrically connected to another component, this includes not only cases where these components are directly connected to each other, but also cases where these components are connected to each other and one or more other components are between them.

[0050] When “A and / or B” is mentioned throughout the specification, it means either A or B, or A and B, unless otherwise stated to the contrary. In other words, the term “and / or” includes any one and all combinations of multiple associated listed items. When “C to D” is mentioned, it means C and below, unless otherwise stated to the contrary.

[0051] In this document, some embodiments are described in further detail with reference to the accompanying drawings, and when the embodiments are described with reference to the accompanying drawings, the same or corresponding parts are assigned the same reference numerals, and their identical descriptions may be omitted.

[0052] Figure 1 This is a schematic side view illustrating an example of an energy storage system 1 according to an embodiment; and Figure 2 It is a schematic diagram. Figure 1 A perspective view of area "A". For ease of illustration, in... Figure 2 The outer shell is omitted in the middle.

[0053] refer to Figure 1 According to the embodiment, the energy storage system (ESS) 1 may include a housing 30, a first door 10, a second door 20, a connection unit 300, and a sealing unit 400.

[0054] The housing 30 can form a receiving space for accommodating one or more battery modules, and can have a shape that is open on at least one side. For example, the housing 30 can have a generally hexahedral shape with one side open, but is not limited thereto.

[0055] In one embodiment, the receiving space within the housing 30 can accommodate multiple battery modules (not shown) mounted on multiple battery racks (not shown), and each battery module can include multiple battery cells (not shown) housed in its housing (not shown). Each battery cell can include a rechargeable and dischargeable secondary battery.

[0056] The first door 10 and the second door 20 can be arranged adjacent to each other on the open side of the housing 30. The first door 10 and the second door 20 can be provided with an openable and closable structure, while providing a sidewall structure that blocks the open side of the housing 30 to open the housing 30 for housing the battery module or to separate the housing from the external space, and thus easily manage the housing.

[0057] The connecting unit 300 may have a first end connected to the first door 10 and a second end connected to the second door 20. Here, the connection between the first door 10 and the first end of the connecting unit 300 or the connection between the second door 20 and the second end of the connecting unit 300 may include an integral fixed structure or a detachable structure.

[0058] When the first or second end of the connecting unit 300 is connected to the first door 10 or the second door 20, the first door 10 and the second door 20 can be fastened to each other. The first door 10 and the second door 20 fastened by the connecting unit 300 can provide a sidewall structure for closing the open side of the housing 30.

[0059] In one embodiment, reference Figure 2 The connecting unit 300 may include a rotating member 320 and a supporting member 310. Additionally, the rotating member 320 may include a rotating shaft 321 at one end, and its other end, without the rotating shaft 321, may be fastened to the first door 10. In one embodiment, one end of the supporting member 310 may be provided with a mounting groove 311, in which the rotating shaft 321 of the rotating member 320 is mounted, and the other end of the supporting member 310, without the mounting groove 311, may be fastened to the second door 20.

[0060] As the rotating member 320 rotates about the rotating axis 321, the first door 10, which is fastened to the rotating member 320, can move to open or close the interior space of the housing 30.

[0061] Additionally, the connecting unit 300 can be fastened to the sealing unit 400 described below, such that the sealing unit 400 can be arranged between the first door 10 and the second door 20. In one embodiment, the plurality of connecting units 300 can be arranged along the longitudinal direction of the sealing unit 400 (i.e., along...). Figure 1 The sealing unit 400 is arranged in the y-direction to stably arrange the sealing unit.

[0062] The sealing unit 400 can be fastened to the connecting unit 300 and is arranged between the first door 10 and the second door 20.

[0063] The sealing unit 400 seals the space between the first door 10 and the second door 20 to prevent or substantially prevent external moisture and foreign matter from entering the receiving space formed by the housing 30. When the sealing unit 400 is fastened to one side of the first door 10 and the second door 20, an unfastened portion of the sealing unit 400 may become entangled in the space between the first door 10 and the second door 20 when opening and closing the first door 10 and the second door 20. In this case, the airtightness of the receiving space for the battery module in the energy storage system 1 may deteriorate, thus reducing the performance of protecting the receiving space from external moisture and foreign matter, or requiring workers to individually inspect and arrange the sealing unit 400, thereby reducing operability.

[0064] The sealing unit 400 of this disclosure can be a structure fastened to the connecting unit 300, and can prevent or substantially prevent the sealing unit 400 from getting caught in the first door 10 and the second door 20 even when performing operations to open and close the housing 30. Therefore, an energy storage system 1 with better airtightness and improved management operability can be provided.

[0065] In one embodiment, the sealing unit 400 may include a sealing member 410 disposed between the mutually facing surfaces of the first door 10 and the second door 20 (see example...). Figure 3 ).

[0066] The sealing member 410 can airtightly seal the space between the first door 10 and the second door 20, and in one embodiment, the length of the sealing member 410 can be arranged to be the same as that of each of the first door 10 and the second door 20 (in Figure 1 The height corresponds to the height in the y-direction.

[0067] In one embodiment, the sealing member 410 may comprise a viscous and flexible material. The material properties described above ensure high airtightness of the sealing member 410 and absorb tolerances and gaps that may occur when the members are fastened together, facilitating product manufacturing and assembly. For example, the sealing member 410 may comprise a material such as rubber or silicone. However, the above-described materials for the sealing member 40 are provided as examples, and the materials are not limited thereto.

[0068] In one embodiment, a first end of the sealing member 410 may be disposed between the facing surfaces of the first door 10 and the second door 20, and a second end of the sealing member 410 may be disposed to protrude from the outer surfaces of the first door 10 and the second door 20. More specifically, the first end of the sealing member 410 may be disposed closer to the interior space of the housing 30 than the second end of the sealing member 410.

[0069] Accordingly, external moisture and foreign matter can be prevented or substantially prevented from flowing into the interior space of the outer casing 30 through the space formed between the mutually facing surfaces of the first door 10 and the second door 20.

[0070] Figure 3 It is a schematic diagram. Figure 2 A partial perspective view of the fastening of the sealing unit 400 and the fixing unit.

[0071] The following is for reference. Figure 3 In a more detailed description of the sealing member 410, in one embodiment, the first end of the sealing member 410 may include a first sealing portion 415 extending toward the first door 10 and the second door 20.

[0072] Here, the first sealing portion 415 can be formed to correspond to or be larger than the direction in which the first door 10 and the second door 20 face each other when the first door 10 and the second door 20 are arranged adjacent to each other (e.g., Figure 2 The separation distance in the x-direction.

[0073] With the first sealing portion 415 positioned between the facing surfaces of the first door 10 and the second door 20, the space between the adjacent first door 10 and the second door 20 can be blocked. Accordingly, external substances (such as moisture and foreign objects) that may flow into the interior space of the housing 30 can be blocked.

[0074] In one embodiment, the first sealing portion 415 may have a shape in which the thickness decreases toward the first door 10 and the second door 20.

[0075] Due to the above shape, even when the width of the protruding shape of the first sealing portion 415 is greater than the separation distance between the first door 10 and the second door 20, the area of ​​the first sealing portion 415 that contacts the first door 10 and the second door 20 can be bent. Therefore, the first sealing portion 415 can be easily arranged in the space between the first door 10 and the second door 20, and correspondingly, it can be easily and conveniently assembled. Furthermore, as a result, the first sealing portion 415 can be in close contact with the first door 10 and the second door 20 in the space between the first door 10 and the second door 20 to form an airtight structure.

[0076] In one embodiment, the second end of the sealing member 410 may include a second sealing portion 416 that protrudes to overlap with the outer surfaces of the first door 10 and the second door 20.

[0077] In one embodiment, the second sealing portion 416 may protrude to have a width greater than the separation distance between the facing surfaces of the first door 10 and the second door 20 when the first door 10 and the second door 20 are arranged adjacent to each other.

[0078] By utilizing the structure that provides a barrier through the second sealing portion 416 to block the space formed between the first door 10 and the second door 20, external substances (such as moisture and foreign objects) that may flow in from the outside can be effectively blocked.

[0079] In one embodiment, the second sealing portion 416 may have a shape that at least partially overlaps with the outer surfaces of the first door 10 and the second door 20. Accordingly, a suspension structure may be provided such that the sealing unit 400 is in close contact with the outer surfaces of the first door 10 and the second door 20 without being drawn into the internal space of the housing 30.

[0080] In one embodiment, when the sealing member 410 includes a first sealing portion 415 and a second sealing portion 416, external substances including moisture can be primarily blocked by the second sealing portion 416 to prevent them from flowing into the housing 30, and are also secondarily blocked by the first sealing portion 415 to prevent them from flowing into the housing 30. Therefore, the airtightness of the energy storage system 1 can be further improved.

[0081] In one embodiment, the sealing member 410 may include a first mounting groove 411 and a second mounting groove 412.

[0082] The first mounting groove 411 may have a shape corresponding to the first door 10, and the second mounting groove 412 may have a shape corresponding to the second door 20. For example, the first mounting groove 411 may have a shape corresponding to the edge of the first door 10, and the second mounting groove 412 may have a shape corresponding to the edge of the second door 20. The first mounting groove 411 and the second mounting groove 412 may be arranged between the first sealing portion 415 and the second sealing portion 416.

[0083] Accordingly, when the sealing member 410 is arranged between the first door 10 and the second door 20, the adhesive force can be improved to airtightly seal the space between the first door 10 and the second door 20.

[0084] In one embodiment, the sealing unit 400 may further include a central member 420, and the energy storage system 1 may further include a fixing unit 210.

[0085] The central member 420 may be arranged to be enclosed (e.g., surrounded) by the sealing member 410. In one embodiment, the central member 420 may comprise a material having higher stiffness and strength than the sealing member 410. For example, the central member 420 may comprise, but is not limited to, a metal-based material or a synthetic resin-based material.

[0086] The central member 420 can be arranged inside the sealing member 410, which has low strength and stiffness, thus supplementing the durability of the sealing unit 400. Due to the material properties of the sealing member 410, the sealing member 410 may not be directly fastened to the connecting unit 300, and even if the sealing member 410 is fastened to the connecting unit 300, the durability of the fastening structure may be an issue. However, in one embodiment, a stable structure for fastening the sealing unit 400 to the connecting unit 300 can be provided by arranging the central member 420 inside the sealing member 410.

[0087] The fixing unit 210 may be arranged between the connecting unit 300 and the central member 420. In one embodiment, the fixing unit 210 may have a shape corresponding to the central member 420.

[0088] The fixing unit 210 may include structures for fastening the connecting unit 300 and the sealing unit 400. In one embodiment, firstly, the central member 420 of the sealing unit 400 may be fastened to the fixing unit 210. For example, the central member 420 may be inserted into and fastened to the fixing unit 210. The sealing member 410 disposed between the central member 420 and the fixing unit 210 may include a partially open area to fasten the central member 420 and the fixing unit 210. In one embodiment, the sealing unit 400 may be fastened to the connecting unit 300 when the fixing unit 210 to which the central member 420 is fastened is fastened. In one embodiment, to fasten the fixing unit 210 to the connecting unit 300, the fixing unit 210 may include a fastening groove 215 and may further include a fastening member (not shown).

[0089] According to one embodiment, the receiving space of the housing 30 can be opened and closed to facilitate the installation and management of battery modules within the energy storage system 1, and the energy storage system 1 can be provided with improved worker efficiency and product performance by including a sealing unit 400, which has a high sealing function and is prevented or substantially prevented from being drawn into the internal space of the housing 30 by closing and opening operations.

[0090] Figure 4 This is a schematic side view illustrating an example of an energy storage system 2 according to an embodiment; Figure 5 This is a schematic diagram illustrating the state under normal conditions. Figure 4 A partial perspective view of area "B"; and Figure 6 It is a schematic diagram illustrating the occurrence of an event. Figure 4 A partial perspective view of area "B". Additionally, Figure 7 This is a plan view schematically illustrating an example of the movement of the sealing member. For ease of illustration, details are omitted. Figures 5 to 7 The outer shell is 30.

[0091] In this document, the energy storage system 2 according to an embodiment is described in more detail with reference to the accompanying drawings. Descriptions identical to those described above may be omitted.

[0092] refer to Figures 4 to 6 According to the embodiment, the energy storage system 2 may include a housing 30, a first door 10, a second door 20, and a sealing unit 400.

[0093] The housing 30 can form a receiving space for accommodating one or more battery modules, and can have a shape that is open on at least one side. For example, the housing 30 can have a generally hexahedral shape with one side open, but is not limited thereto.

[0094] In one embodiment, the receiving space within the housing 30 may include multiple battery modules (not shown) mounted on multiple battery racks (not shown), and each battery module may include multiple battery cells (not shown) housed in its housing (not shown). Each battery cell may include a rechargeable and dischargeable secondary battery.

[0095] The first door 10 and the second door 20 can be arranged adjacent to each other on the open side of the housing 30. The first door 10 and the second door 20 can be provided with an openable and closable structure, while providing a sidewall structure that blocks the open side of the housing 30 to open the housing 30 for housing the battery module or to separate the housing from the external space, and thus easily manage the housing.

[0096] The sealing unit 400 can be arranged between the first door 10 and the second door 20.

[0097] The sealing unit 400 can seal the space between the first door 10 and the second door 20 to prevent or substantially prevent external moisture and foreign matter from entering the receiving space formed by the housing 30.

[0098] In one embodiment, reference Figure 7 The sealing unit 400 may include a sealing member 410 arranged to move along the mutually facing surfaces of the first door 10 and the second door 20.

[0099] In one embodiment, the sealing member 410 may have the same characteristics as each of the first door 10 and the second door 20 (in... Figure 1 The length corresponding to the height in the y direction, and can be arranged so as not to be directly fastened to the first door 10 or the second door 20.

[0100] In one embodiment, the sealing member 410 may comprise a viscous and flexible material. The material properties described above ensure high airtightness of the sealing member 410 and absorb tolerances and gaps that may occur when the members are fastened together, facilitating product manufacturing and assembly. For example, the sealing member 410 may comprise a material such as rubber or silicone. However, the above materials for the sealing member 410 are examples, and the materials are not limited thereto.

[0101] The sealing member 410 can airtightly seal the space between the first door 10 and the second door 20 to protect the battery module in the containment space of the energy storage system 2 from external moisture and foreign objects.

[0102] However, the energy storage system 2 that houses multiple battery modules may be at risk of events such as fire and explosion due to the heat generated by the battery modules, and if such an event occurs, the explosion pressure generated in the internal space of the energy storage system 2 may not be discharged by the sealing member 410.

[0103] Therefore, according to one embodiment, in the event of an incident, the sealing member 410 of this disclosure can move along the mutually facing surfaces of the first door 10 and the second door 20 (e.g., in...). Figure 7 (Move in the direction indicated by the arrow) to ensure that the structure can release the explosive pressure.

[0104] In this configuration, a separate pressure regulating device is not required, thus improving the space efficiency of the energy storage system 2 and ensuring its durability and safety. A more detailed description of the movement of the sealing member 410 follows.

[0105] In one embodiment, the energy storage system 2 may further include a connection unit 300, and a sealing unit 400 may be fastened to the connection unit 300.

[0106] The connecting unit 300 may have a first end connected to the first door 10 and a second end connected to the second door 20. The connection between the first door 10 and the first end of the connecting unit 300 or the connection between the second door 20 and the second end of the connecting unit 300 may include an integral fixed structure or a detachable structure.

[0107] When the first or second end of the connecting unit 300 is connected to the first door 10 or the second door 20, the first door 10 and the second door 20 can be fastened to each other. The first door 10 and the second door 20 fastened by the connecting unit 300 can provide a sidewall structure for the open side of the closed housing 30.

[0108] In one embodiment, the connecting unit 300 may include a rotating member 320 and a supporting member 310. In one embodiment, the rotating member 320 may include a rotating shaft 321 at one end, and its other end without the rotating shaft 321 may be fastened to the first door 10. In one embodiment, the first end of the supporting member 310 may be provided with a mounting groove 311, in which the rotating shaft 321 of the rotating member 320 is mounted, and the second end of the supporting member 310 without the mounting groove 311 may be fastened to the second door 20.

[0109] As the rotating member 320 rotates about the rotating axis 321, the first door 10, which is fastened to the rotating member 320, can move to open or close the interior space of the housing 30.

[0110] In one embodiment, the connecting unit 300 can be fastened to the sealing unit 400, allowing the sealing unit 400 to be arranged between the first door 10 and the second door 20. To stably arrange the sealing unit 400, multiple connecting units 300 can be arranged along the longitudinal direction of the sealing unit 400 (along...). Figure 1 Arranged in the y-direction.

[0111] When the sealing unit 400 is fastened to one side of the first door 10 and the second door 20, the unfastened portion of the sealing unit 400 may become caught in the space between the first door 10 and the second door 20 when the first door 10 and the second door 20 are opened and closed. In this case, the airtightness of the housing space of the energy storage system 2 for the battery module may deteriorate, thus reducing its ability to protect the housing space from external moisture and foreign objects. Alternatively, workers may need to inspect and arrange the sealing unit 400 separately, which may reduce operability.

[0112] However, the sealing unit 400 of this disclosure can be a structure fastened to the connecting unit 300, and even when performing operations to open and close the housing 30, it can prevent or substantially prevent the sealing unit 400 from getting caught in the first door 10 and the second door 20. Therefore, an energy storage system 2 with improved airtightness and improved manageability can be provided.

[0113] In one embodiment, a first end of the sealing member 410 may be disposed between the facing surfaces of the first door 10 and the second door 20, and a second end of the sealing member 410 may be disposed to protrude from the outer surfaces of the first door 10 and the second door 20. More specifically, the first end of the sealing member 410 may be disposed closer to the interior space of the housing 30 than the second end of the sealing member 410.

[0114] Accordingly, external moisture and foreign matter can be prevented or substantially prevented from flowing into the interior space of the outer casing 30 through the space formed between the mutually facing surfaces of the first door 10 and the second door 20.

[0115] The sealing member 410 is described in more detail below. In one embodiment, the first end of the sealing member 410 may include a first sealing portion 415 extending toward the first door 10 and the second door 20 (see example...). Figure 3 ).

[0116] In one embodiment, the first sealing portion 415 may be formed to correspond to or be larger than the direction in which the first door 10 and the second door 20 face each other when the first door 10 and the second door 20 are arranged adjacent to each other (e.g., in...). Figure 2 The separation distance in the x-direction.

[0117] With the first sealing portion 415 positioned between the facing surfaces of the first door 10 and the second door 20, the space between the adjacent first door 10 and the second door 20 can be blocked. Accordingly, external substances (such as moisture and foreign objects) that may flow into the interior space of the housing 30 can be blocked.

[0118] In one embodiment, the first sealing portion 415 may have a shape in which the thickness decreases toward the first door 10 and the second door 20.

[0119] Due to the above shape, even when the width of the protruding shape of the first sealing portion 415 is greater than the separation distance between the first door 10 and the second door 20, the area of ​​the first sealing portion 415 that contacts the first door 10 and the second door 20 can be bent (see reference). Figure 7 Therefore, the first sealing portion 415 can be easily arranged in the space between the first door 10 and the second door 20, and correspondingly, it can be easily and conveniently assembled. Furthermore, as a result, the first sealing portion 415 can make closer contact with the first door 10 and the second door 20 in the space between them to form an airtight structure.

[0120] Furthermore, even if the sealing member 410 moves along the opposing surfaces of the first door 10 and the second door 20 due to pressure generated in the internal space during an event, the area of ​​the first sealing portion 415 that contacts the first door 10 and the second door 20 can be bent (see reference). Figure 7 This ensures that there is space to release pressure.

[0121] In one embodiment, the second end of the sealing member 410 may include a second sealing portion 416 (see example...) Figure 3 The second sealing portion 416 protrudes to overlap with the outer surfaces of the first door 10 and the second door 20.

[0122] In one embodiment, the second sealing portion 416 may protrude to have a width greater than the separation distance between the facing surfaces of the first door 10 and the second door 20 when the first door 10 and the second door 20 are arranged adjacent to each other.

[0123] By utilizing the structure that provides a barrier through the second sealing portion 416 to block the space formed between the first door 10 and the second door 20, external substances (such as moisture and foreign objects) that may flow in from the outside can be effectively blocked.

[0124] In one embodiment, the second sealing portion 416 may have a shape that at least partially overlaps with the outer surfaces of the first door 10 and the second door 20. Accordingly, a suspension structure may be provided such that the sealing unit 400 is in close contact with the outer surfaces of the first door 10 and the second door 20 without being drawn into the internal space of the housing 30.

[0125] In one embodiment, when the sealing member 410 includes a first sealing portion 415 and a second sealing portion 416, external substances including moisture can be primarily blocked by the second sealing portion 416 to prevent them from flowing into the housing 30, and are also secondarily blocked by the first sealing portion 415 to prevent them from flowing into the housing 30. Therefore, the airtightness of the energy storage system 2 can be further improved.

[0126] In one embodiment, the sealing member 410 may include a first mounting groove 411 and a second mounting groove 412 (see example...). Figure 3 ).

[0127] In one embodiment, the first mounting groove 411 may have a shape corresponding to the first door 10, and the second mounting groove 412 may have a shape corresponding to the second door 20. For example, the first mounting groove 411 may have a shape corresponding to the edge of the first door 10, and the second mounting groove 412 may have a shape corresponding to the edge of the second door 20. Furthermore, the first mounting groove 411 and the second mounting groove 412 may be arranged between the first sealing portion 415 and the second sealing portion 416.

[0128] Accordingly, when the sealing member 410 is arranged between the first door 10 and the second door 20, the adhesive force can be improved to airtightly seal the space between the first door 10 and the second door 20.

[0129] Figure 8 This is a perspective view that schematically illustrates an example of a guide unit; Figure 9 This is a schematic partial perspective view illustrating the fastening of the guide unit and the central component when in a normal state; Figure 10 It is a schematic diagram. Figure 9 Cross-sectional views of the guiding unit and the central component; Figure 11 It is a schematic partial perspective view illustrating the fastening of the guide unit and central component when an event occurs; and Figure 12 It is a schematic diagram. Figure 11 Cross-sectional view of the guiding unit and the central component.

[0130] refer to Figure 8 and Figure 9 In one embodiment, the sealing unit 400 may further include a central member 420, and the energy storage system 2 of this disclosure may further include a guiding unit 600.

[0131] The central member 420 may be arranged to be surrounded by the sealing member 410. In one embodiment, the central member 420 may comprise a material having higher stiffness and strength than the sealing member 410. For example, the central member 420 may comprise a metal-based material or a synthetic resin-based material, but is not limited thereto.

[0132] The central member 420 can be arranged inside the sealing member 410, which has low strength and stiffness, thus supplementing the durability of the sealing unit 400. Due to the material properties of the sealing member 410, the sealing member 410 may not be directly fastened to the connecting unit 300, and even if the sealing member 410 is fastened to the connecting unit 300, the durability of the fastening structure may be an issue. However, in one embodiment, a stable structure for fastening the sealing unit 400 to the connecting unit 300 can be provided by arranging the central member 420 inside the sealing member 410.

[0133] The guide unit 600 may be arranged between the connecting unit 300 and the central member 420. The guide unit 600 may have a shape corresponding to the central member 420. In one embodiment, the guide unit 600 may include a guide portion 610 having a shape corresponding to the central member 420.

[0134] The guide unit 600 can provide a structure for fastening the connecting unit 300 and the sealing unit 400. In one embodiment, the central member 420 of the sealing unit 400 can be fastened to the guide portion 610 of the guide unit 600. For example, the central member 420 can be inserted into and fastened to the guide unit 600. Here, the sealing member 410 disposed between the central member 420 and the guide unit 600 may include a partially open area to fasten the central member 420 and the guide unit 600. Furthermore, when the guide unit 600 to which the central member 420 is fastened is fastened to the connecting unit 300, the sealing unit 400 can be finally fastened to the connecting unit 300. Here, in order to fasten the guide unit 600 to the connecting unit 300, the guide unit 600 may include a fastening groove 615 and may further include a fastening member (not shown).

[0135] As a specific embodiment, the guiding portion 610 of the guiding unit 600 may include a first guiding portion 610a configured to guide the fastening position of the central member 420 to a first position and a second guiding portion 610b configured to guide the fastening position of the central member 420 to a second position. Here, the first position may refer to a position closer to the internal space of the energy storage system 2 than the second position.

[0136] In one embodiment, the first guide portion 610a and the second guide portion 610b may each have a shape corresponding to the central member 420 and may be arranged to be connected to each other.

[0137] Accordingly, a structure can be provided in which the central member 420 can be disposed in each of the first guide portion 610a and the second guide portion 620b, and the central member 420 can be arranged in a first position or a second position by moving between the first guide portion 610a and the second guide portion 610b. In one embodiment, when the central member 420 is in the first position, a first fastening gap may be present between the first guide portion 610a and the central member 420, and when the central member 420 is in the second position, a second fastening gap may be present between the second guide portion 610b and the central member 420, and the first fastening gap may be greater than the second fastening gap.

[0138] refer to Figure 9 and Figure 10 When the energy storage system 2 is in a normal state free from fire or explosion, the central component 420 can be fastened to the first guide portion 610a of the guide unit 600. At this time, as... Figure 5 As shown, the sealing unit 400 can be arranged to be in close contact with the outer surfaces of the first door 10 and the second door 20. Accordingly, under normal conditions, the sealing unit 400 of the energy storage system 2 can maintain high sealing performance.

[0139] refer to Figure 11 and Figure 12 If an event such as a fire or explosion occurs in the energy storage system 2, the central component 420 can be fastened to the second guide portion 610b of the guide unit 600. In this case, if... Figure 6 As shown, the sealing unit 400 can be pushed to the outside of the energy storage system 2. Therefore, even in the event of an explosive pressure in the internal space of the energy storage system 2, the structural features that provide elasticity and flexibility through the movement of the sealing unit 400 allow the pressure to be released and the impact caused by the pressure to be absorbed. Thus, damage such as component breakage can be prevented or substantially prevented, and the energy storage system 2 can be provided with improved durability and safety.

[0140] Once the incident has ended, the worker can reposition the central component 420 in the first guide section 610a to ensure airtightness within the containment space of the energy storage system 2.

[0141] Therefore, the energy storage system 2 according to this disclosure can effectively protect the battery module by providing high sealing performance relative to the internal space, and can improve durability and safety by providing a structure that can flexibly respond to events such as fire or explosion.

[0142] According to one or more implementation schemes, the performance and manageability of energy storage systems can be improved by providing a structure that can be opened and closed and has improved airtightness.

[0143] In addition, the stability of energy storage systems can be improved by providing structures that can release internal pressure even in the event of events such as fire and / or explosion.

[0144] However, the aspects and effects obtained through this disclosure are not limited to those described above, and those skilled in the art can clearly understand from the description of this disclosure other technical aspects and effects not mentioned.

[0145] Although the present disclosure has been described above with reference to one or more embodiments illustrated in the accompanying drawings, this description is provided by way of example only, and those skilled in the art will understand that various modifications and other equivalent embodiments can be made therefrom. Therefore, the scope of this disclosure should be defined by the spirit of the appended claims.

Claims

1. An energy storage system comprising: a housing having an internal space in which one or more battery modules are accommodated and at least one open side; a first door and a second door disposed adjacent to each other at the at least one open side of the housing; a connection unit having a first end connected to the first door and a second end connected to the second door; and a sealing unit fastened to the connection unit and disposed between the first door and the second door. 2.The energy storage system of claim 1, wherein the connection unit comprises: a rotating member fastened to the first door and including a rotating shaft; and a support member fastened to the second door and including a seating groove in which the rotating shaft is seated. 3.The energy storage system of claim 1 or 2, wherein the sealing unit comprises a sealing member disposed between surfaces of the first door and the second door facing each other. 4.The energy storage system of claim 3, wherein a first end of the sealing member is disposed between the surfaces of the first door and the second door facing each other, and a second end of the sealing member is disposed to protrude from an outer surface of the first door and the second door. 5.The energy storage system of claim 4, wherein the first end of the sealing member includes a first sealing portion extending toward the first door and the second door. 6.The energy storage system of claim 5, wherein the first sealing portion has a shape in which a thickness decreases toward the first door and the second door. 7.The energy storage system of claim 4, wherein the second end of the sealing member includes a second sealing portion protruding to overlap the outer surface of the first door and the second door. 8.The energy storage system of claim 3, wherein the sealing member includes a first seating groove having a shape corresponding to the first door and a second seating groove having a shape corresponding to the second door. 9.The energy storage system of claim 3, wherein the sealing unit further comprises a center member disposed to be surrounded by the sealing member, and the energy storage system further comprises a fixing unit disposed between the connection unit and the center member and having a shape corresponding to the center member. 10.An energy storage system comprising: a housing having an internal space in which one or more battery modules are accommodated and at least one open side; a first door and a second door disposed adjacent to each other at the at least one open side of the housing; and a sealing unit disposed between the first door and the second door, wherein the sealing unit includes a sealing member disposed to move along surfaces of the first door and the second door facing each other. 11.The energy storage system of claim 10, further comprising a connection unit having a first end connected to the first door and a second end connected to the second door, wherein the sealing unit is fastened to the connection unit. ​ ​ ​ 12.The energy storage system of claim 11, wherein the connection unit comprises: a rotating member fastened to the first door and including a rotating shaft; and a support member fastened to the second door and including a seating groove in which the rotating shaft is seated. 13.The energy storage system of claim 11, wherein the sealing unit further comprises a center member arranged to be surrounded by the sealing member, and the energy storage system further comprises a guide unit arranged between the connection unit and the center member and having a shape corresponding to the center member. 14.The energy storage system of claim 13, wherein the guide unit includes a first guide portion configured to guide a fastening position of the center member to a first position, and a second guide portion configured to guide the fastening position to a second position. when the center member is located at the first position, and a second fastening gap between the second guide portion and the center member when the center member is located at the second position, and the first fastening gap is greater than the second fastening gap.

15. The energy storage system of claim 14, wherein, 16.The energy storage system of any one of claims 10 to 15, wherein a first end of the sealing member is arranged between the surfaces of the first and second doors facing each other, and a second end of the sealing member is arranged to protrude from outer surfaces of the first and second doors. 17.The energy storage system of claim 16, wherein the first end of the sealing member includes a first sealing portion extending toward the first and second doors. 18.The energy storage system of claim 17, wherein the first sealing portion has a shape having a thickness decreasing toward the first and second doors. 19.The energy storage system of claim 16, wherein the second end of the sealing member includes a second sealing portion protruding to overlap the outer surfaces of the first and second doors. 20.The energy storage system of any one of claims 10 to 15, wherein the sealing member includes a first seating groove having a shape corresponding to the first door, and a second seating groove having a shape corresponding to the second door. ​

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