Energy storage devices

Abstract

To provide an energy storage device capable of fixing a fire extinguishing piping at a normal position.SOLUTION: An energy storage device is constructed by containing: a rack frame housing a battery module; a sub-frame fixed to the rack frame, and faced to the battery module; a guide rail formed in a concave shape from one surface of the sub-frame; a fire extinguishing piping arranged into an inner part of the guide rail and having an injection hole injecting an extinction liquid; a thermo-sensitive member arranged so as to cover the fire extinguishing piping, and opening and closing the injection hole while being interlocked with the change of a temperature; and a first departure prevention member provided between the guide rail and the thermo-sensitive member, and preventing the fire extinguishing piping from being departed from the guide rail.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an energy storage device.

Background Art

[0002] Generally, an energy storage device (ESS, Energy Storage System) is a device that can store surplus electricity or store electricity produced by utilizing renewable energy. A battery rack can be configured by installing a plurality of battery modules on a rack and accommodating a plurality of racks in a container. A battery module can be configured by aggregating a plurality of secondary batteries electrically interconnected in various structures.

[0003] In an energy storage device, a direct injection system for directly injecting a fire extinguishing liquid into a battery module at the time of a fire is installed for extinguishing the fire. Such a direct injection system can be implemented by a method of positioning a fire extinguishing pipe capable of injecting a fire extinguishing liquid above the battery module. However, when the fire extinguishing pipe is detached or rotated from its correct position, the fire extinguishing liquid is injected in a direction different from the preset injection direction, making it difficult to quickly suppress the fire, and there is a risk that the fire extinguishing pipe may be damaged due to interference with the battery module.

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide an energy storage device capable of fixing a fire extinguishing pipe in a correct position.

Means for Solving the Problems

[0005] The energy storage device according to the present invention includes: a rack frame for housing a battery module; a subframe fixed to the rack frame and facing the battery module; a guide rail formed in a concave shape from one surface of the subframe; a fire extinguishing pipe disposed inside the guide rail and having an injection hole for spraying fire extinguishing liquid; a heat-sensitive member disposed to cover the fire extinguishing pipe and opening and closing the injection hole in conjunction with changes in temperature; and a first detachment prevention member provided between the guide rail and the heat-sensitive member to prevent the fire extinguishing pipe from detaching from the guide rail.

[0006] The first detachment prevention member may include a slit formed through the guide rail, and a stopper that protrudes from the heat-sensitive member toward the slit and is inserted into the slit.

[0007] The width of the stopper may be smaller than the width of the slit.

[0008] The slits may be provided in multiple quantities and arranged symmetrically on both sides of the guide rail, and the stoppers may be provided in multiple quantities and arranged symmetrically on both sides of the heat-sensitive member.

[0009] The fire extinguishing pipe is inserted into the guide rail in a first direction through an open surface formed in the guide rail, and the slit may include a first slit extending along the first direction and a second slit connected to the first slit and extending along a direction intersecting the first direction.

[0010] The first slit includes a first end connected to the second slit and a second end located on the opposite side of the first end, the second end of which may penetrate the subframe.

[0011] The second slit may extend along the length of the guide rail.

[0012] The width of the second slit may be smaller than the width of the first slit.

[0013] The first detachment prevention member may include a groove formed in a concave shape from the outer surface of the heat-sensitive member, and a stopper that protrudes from the guide rail and is inserted into the groove.

[0014] The grooves may be provided in multiple units and arranged symmetrically on both sides of the heat-sensitive member, and the stoppers may be provided in multiple units and arranged symmetrically on both sides of the guide rail.

[0015] The width of the stopper may be smaller than the width of the groove.

[0016] The groove may extend along the length of the heat-sensitive member.

[0017] The length of the groove may be shorter than the length of the heat-sensitive member.

[0018] One end of the groove may penetrate one end of the heat-sensitive member.

[0019] The system may further include a second detachment prevention member, which is positioned outside the guide rail and facing the heat-sensitive member.

[0020] The first detachment prevention member and the second detachment prevention member may be spaced apart along the longitudinal direction of the guide rail.

[0021] The second detachment prevention member may be provided in multiple units and may be arranged symmetrically on both sides of the guide rail.

[0022] The fire extinguishing pipe is inserted into the guide rail in a first direction through an open surface formed in the guide rail, and the open surface and the second detachment prevention member may be arranged to face each other along the first direction.

[0023] The second detachment prevention member may extend in a direction intersecting the first direction from the sub-frame.

Advantages of the Invention

[0024] The energy storage device according to the present invention restricts the rotation of the fire extinguishing pipe around the central axis from the inside of the guide rail by the first detachment prevention member, thereby preventing the injection direction of the injection holes from being changed and ensuring the reliability of the fire suppression performance.

[0025] The energy storage device according to the present invention can prevent the fire extinguishing pipe from being damaged due to interference with the battery module placed on the sub-frame by preventing the fire extinguishing pipe from detaching from the guide rail by the first detachment prevention member.

[0026] When the function of the first detachment prevention member is lost due to breakage of the stopper or the like, the energy storage device according to the present invention can additionally prevent the fire extinguishing pipe from detaching from the guide rail by the second detachment prevention member.

Brief Description of the Drawings

[0027] [Figure 1] It is a perspective view schematically showing the configuration of the energy storage device according to the first embodiment of the present invention. [Figure 2] It is a perspective view schematically showing the configuration of the sub-frame and the guide rail according to the first embodiment of the present invention. [Figure 3] It is a perspective view showing the configuration of the sub-frame and the guide rail according to the first embodiment of the present invention from a different perspective from FIG. 2. [Figure 4] It is a perspective view schematically showing the configuration of the fire extinguishing pipe and the heat-sensitive member according to the first embodiment of the present invention. [Figure 5] It is a perspective view showing the configuration of the fire extinguishing pipe and the heat-sensitive member according to the first embodiment of the present invention from a different perspective from FIG. 4. [Figure 6] It is a perspective view schematically showing the configuration of the first detachment prevention member according to the first embodiment of the present invention. [Figure 7] This is an exploded perspective view schematically showing the configuration of the first detachment prevention member according to the first embodiment of the present invention. [Figure 8] This is a schematic plan view showing the configuration of the first detachment prevention member according to the first embodiment of the present invention. [Figure 9] This is a schematic front view showing the configuration of the first detachment prevention member according to the first embodiment of the present invention. [Figure 10] This diagram schematically shows the process by which fire extinguishing piping is assembled onto guide rails in an energy storage device according to a first embodiment of the present invention. [Figure 11] This diagram schematically shows the process by which fire extinguishing piping is assembled onto guide rails in an energy storage device according to a first embodiment of the present invention. [Figure 12] This diagram schematically shows the process by which fire extinguishing piping is assembled onto guide rails in an energy storage device according to a first embodiment of the present invention. [Figure 13] This figure shows the state in which an external force is applied to the fire extinguishing piping in the condition shown in Figure 12. [Figure 14] This is an exploded perspective view schematically showing the configuration of the first detachment prevention member according to a second embodiment of the present invention. [Figure 15] This is a schematic plan view showing the configuration of the first detachment prevention member according to a second embodiment of the present invention. [Figure 16] This diagram schematically shows the process by which fire extinguishing piping is assembled onto guide rails in an energy storage device according to a second embodiment of the present invention. [Figure 17] This diagram schematically shows the process by which fire extinguishing piping is assembled onto guide rails in an energy storage device according to a second embodiment of the present invention. [Figure 18] This diagram schematically shows the process by which fire extinguishing piping is assembled onto guide rails in an energy storage device according to a second embodiment of the present invention. [Figure 19] This figure shows the state in which an external force is applied to the fire extinguishing piping in the condition shown in Figure 18. [Modes for carrying out the invention]

[0028] Hereinafter, embodiments of the energy storage device according to the present invention will be described with reference to the attached drawings.

[0029] In this process, the thickness of each line and the size of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. Furthermore, the terms described later are defined considering the function of the present invention, and these may change depending on the intent or convention of the user and operator. Therefore, these terms must be defined based on the content throughout this specification.

[0030] Furthermore, in this specification, when one part is described as being "connected" to another part, this includes not only cases where it is "directly connected," but also cases where it is "indirectly connected" with another component in between. In this specification, when one part is described as "containing" a component, this does not exclude other components, unless otherwise stated, but rather means that it may further "contain" other components.

[0031] Furthermore, the same reference numerals throughout this specification may refer to the same component. Even if the same or similar reference numerals are not mentioned or described in a particular drawing, those reference numerals may be described in reference to other drawings. Also, even if a particular drawing does not show a part with reference numerals, that part may be described in reference to other drawings. Furthermore, the number, shape, size, and relative differences in size of each detail component included in the drawings of this application are set for the sake of understanding and do not limit each embodiment, and can be embodied in a variety of forms.

[0032] Figure 1 is a schematic perspective view showing the configuration of an energy storage device according to a first embodiment of the present invention.

[0033] Referring to Figure 1, the energy storage device according to this embodiment includes a rack frame 100, a subframe 200, a guide rail 300, a fire extinguishing pipe 400, a heat-sensitive member 500, and a first detachment prevention member 600.

[0034] The rack frame 100 has a space inside in which a battery module B can be housed. The rack frame 100 according to this embodiment may have the form of a box or frame with a hollow interior. The rack frame 100 may be placed inside a building, or it may be placed inside a container, cabinet, etc. The rack frame 100 may be made of a highly rigid material such as steel so that damage due to loads applied from the battery module B can be prevented. In addition to the rectangular parallelepiped shape shown in Figure 1, the shape of the rack frame 100 can be redesigned to various shapes such as polyhedra and cylinders.

[0035] Battery module B stores power through charging and discharging operations and supplies the stored power to external electronic devices (not shown). Battery module B may include a module case having a substantially box shape, a plurality of battery cells arranged inside the module case, and a cooling plate through which cooling water flows to cool the battery cells. The battery cells may be pouch-type rechargeable batteries, prismatic rechargeable batteries, or cylindrical rechargeable batteries.

[0036] Multiple battery modules B may be provided. Multiple battery modules B may be stacked vertically inside the rack frame 100. That is, multiple battery modules B may be arranged so as to be spaced apart from each other along the Z-axis with respect to Figure 1. Alternatively, multiple battery modules B may be arranged in multiple rows along the horizontal direction. That is, multiple battery modules B may be arranged in multiple rows along the Y-axis with respect to Figure 1.

[0037] The subframe 200 is fixed to the rack frame 100 and positioned facing the battery module B. Within the rack frame 100, the subframe 200 can function as a support for the battery module B and the fire extinguishing piping 400, which will be described later.

[0038] Figure 2 is a schematic perspective view showing the configuration of the subframe and guide rail according to the first embodiment of the present invention, and Figure 3 is a perspective view showing the configuration of the subframe and guide rail according to the first embodiment of the present invention from a different viewpoint than that of Figure 2.

[0039] Referring to Figures 1 to 3, the subframe 200 in this embodiment may be formed to have a substantially flat plate shape. Multiple subframes 200 may be provided. Multiple subframes 200 may be arranged between any pair of battery modules B that are separated in the vertical direction. With respect to one of the battery modules B, multiple subframes 200 may be arranged symmetrically on both sides of the width direction of the battery module B. Here, the width direction of the battery module B may mean the direction aligned with the Y axis with respect to Figure 1.

[0040] The lower surface of the subframe 200 positioned between any pair of vertically adjacent battery modules B may be separated from the upper surface of the lower battery module B. Alternatively, the upper surface of the subframe 200 positioned between any pair of vertically adjacent battery modules B may be in contact with the lower surface of the upper battery module B. This allows each battery module B to have its lower surface resting on the subframe 200 and be supported inside the rack frame 100, while also providing space on its upper surface for the fire extinguishing liquid sprayed from the fire extinguishing pipe 400, which will be described later, to be transmitted.

[0041] The guide rail 300 provides a space on the subframe 200 in which the fire extinguishing pipes 400 can be accommodated. In this embodiment, the guide rail 300 may be formed by being recessed downward from the upper surface of the subframe 200. The longitudinal direction of the guide rail 300 may be aligned with the longitudinal direction of the battery module B. Here, the longitudinal direction of the battery module B may mean the direction aligned with the X-axis direction with reference to Figure 1.

[0042] An open surface 301 may be formed on the upper surface of the guide rail 300, connecting the internal space of the guide rail 300 with the external space. This allows the guide rail 300 to have a cross-section surrounded by a pair of sides, a bottom surface, and the open surface 301. Figure 2 shows an example where the cross-section of the guide rail 300 is approximately rectangular, but the cross-section of the guide rail 300 is not limited to this, and can be redesigned to various shapes such as trapezoids, triangles, and semicircles.

[0043] The lower surface of the guide rail 300 may be positioned opposite the upper surface of the battery module B at a predetermined distance. Multiple through-holes 302 may be formed in the lower surface of the guide rail 300. The through-holes 302 may be formed to penetrate vertically through the lower surface of the guide rail 300. Each through-hole 302 may be positioned opposite a vent hole (not shown) of each battery cell provided in the battery module B.

[0044] The fire extinguishing pipe 400 is located inside the guide rail 300 and transports the fire extinguishing liquid.

[0045] Figure 4 is a schematic perspective view showing the configuration of the fire extinguishing piping and heat-sensitive member according to the first embodiment of the present invention, and Figure 5 is a perspective view showing the configuration of the fire extinguishing piping and heat-sensitive member according to the first embodiment of the present invention from a different viewpoint than that of Figure 4.

[0046] Referring to Figures 1 to 5, the fire extinguishing pipe 400 in this embodiment may be formed to have the shape of a hollow pipe. The fire extinguishing pipe 400 can receive fire extinguishing liquid supplied from outside the rack frame 100 via a separate hose, pipe, or the like. The cross-sectional shape of the fire extinguishing pipe 400 can be designed to be a variety of shapes other than the circular shape shown in Figures 2 to 5.

[0047] The fire extinguishing pipe 400 may be positioned so that its longitudinal direction aligns with the longitudinal direction of the guide rail 300. The cross-sectional area of ​​the fire extinguishing pipe 400 may be smaller than the cross-sectional area of ​​the guide rail 300. The fire extinguishing pipe 400 may be inserted into the guide rail 300 from the outside of the subframe 200 via the open surface 301 in a first direction. Here, the first direction may mean the direction aligned with the Z-axis from the open surface 301 toward the interior of the guide rail 300. The fire extinguishing pipe 400 may slide along the longitudinal direction of the guide rail 300 while inserted inside the guide rail 300.

[0048] Multiple fire extinguishing pipes 400 may be provided. Multiple fire extinguishing pipes 400 may be individually arranged inside each guide rail 300.

[0049] The fire extinguishing pipe 400 may have injection holes 401 formed therein that spray the fire extinguishing liquid flowing inside the fire extinguishing pipe 400 to the outside of the fire extinguishing pipe 400. Multiple injection holes 401 may be provided. Multiple injection holes 401 may be arranged to be spaced apart from each other along the length of the fire extinguishing pipe 400. As the fire extinguishing pipe 400 is inserted into the guide rail 300, each injection hole 401 may be positioned to face its respective through hole 302 individually.

[0050] The heat-sensitive component 500 is positioned to cover the fire extinguishing pipe 400 and opens and closes the spray hole 401 in conjunction with changes in temperature.

[0051] The heat-sensitive member 500 in this embodiment may be formed to cover the entire circumferential surface of the fire extinguishing pipe 400. The cross-sectional shape of the heat-sensitive member 500 is not limited to the shapes shown in Figures 4 and 5, and various design modifications are possible within the range of shapes that can cover the circumferential surface of the fire extinguishing pipe 400. The cross-sectional area of ​​the heat-sensitive member 500 may be formed to be smaller than the cross-sectional area of ​​the guide rail 300. This allows the heat-sensitive member 500 to guide the fire extinguishing pipe 400 so that it can be smoothly inserted into the inside of the guide rail 300.

[0052] Multiple heat-sensitive elements 500 may be provided. Multiple heat-sensitive elements 500 may be arranged to be spaced apart from each other along the length of the fire extinguishing pipe 400. Each heat-sensitive element 500 may be arranged to face a different spray hole 401. This allows the heat-sensitive elements 500 to limit the spraying of fire extinguishing liquid from the spray holes 401 within a normal temperature range.

[0053] When the heat-sensitive member 500 is heated above a set temperature, it can melt and open the spray hole 401. This allows the heat-sensitive member 500 to open the spray hole 401 in the event of a fire, guiding the fire extinguishing liquid transported through the fire extinguishing pipe 400 to be sprayed onto the upper surface of the battery module B through the spray hole 401 and the through-hole 302. Exemplarily, the heat-sensitive member 500 may melt in the range of 80°C to 250°C. Here, 80°C is the temperature at which the heat-sensitive member 500 begins to melt, and 250°C may be the temperature at which the heat-sensitive member 500 completely melts. The heat-sensitive member 500 may be made of a resin material such as ABS, PP, PC, PE, or PFA.

[0054] When the fire extinguishing pipe 400 is inserted into the guide rail 300, a planar mounting surface 501 may be formed on one side of the heat-sensitive member 500 facing the open surface 301, i.e., the upper surface. The mounting surface 501 may be arranged parallel to the open surface 301. The mounting surfaces 501 may be provided in pairs. The pair of mounting surfaces 501 may be arranged on both sides of the heat-sensitive member 500 in the width direction.

[0055] A thin film portion 502 may be formed on the other side of the heat-sensitive member 500 facing the injection hole 401, i.e., the lower surface. The thickness of the thin film portion 502 may be thinner than the thickness of the remaining area of ​​the heat-sensitive member 500. For example, assuming that the thickness of the heat-sensitive member 500 around the thin film portion 502 is 1 mm, the thickness of the thin film portion 502 may be 0.3 mm to 0.6 mm or 0.2 mm to 0.9 mm. This allows the thin film portion 502 to melt faster than the remaining area of ​​the heat-sensitive member 500 when heat is applied to the heat-sensitive member 500, enabling the injection hole 401 to open quickly.

[0056] The first detachment prevention member 600 is provided between the guide rail 300 and the heat-sensitive member 500 to prevent the fire extinguishing pipe 400 from detaching from the guide rail 300. The first detachment prevention member 600 can also restrict the fire extinguishing pipe 400 from rotating around its central axis inside the guide rail 300. As a result, the first detachment prevention member 600 can prevent the fire extinguishing pipe 400 from deviating from its correct position and changing the spray direction of the spray holes 401, and can prevent the fire extinguishing pipe 400 from being damaged by interference with the battery module B.

[0057] Figure 6 is a schematic perspective view showing the configuration of the first detachment prevention member according to the first embodiment of the present invention, Figure 7 is a schematic exploded perspective view showing the configuration of the first detachment prevention member according to the first embodiment of the present invention, Figure 8 is a schematic plan view showing the configuration of the first detachment prevention member according to the first embodiment of the present invention, and Figure 9 is a schematic front view showing the configuration of the first detachment prevention member according to the first embodiment of the present invention.

[0058] Referring to Figures 6 to 9, the first detachment prevention member 600 according to this embodiment may include a slit 610 and a stopper 620.

[0059] The slit 610 is formed by penetrating the guide rail 300. There may be multiple slits 610. Multiple slits 610 may be arranged symmetrically on both sides of the guide rail 300 in the width direction. Multiple slits 610 may be arranged in multiple rows along the length direction of the guide rail 300.

[0060] The slit 610 in this embodiment may include a first slit 611 and a second slit 612.

[0061] The first slit 611 forms one side of the slit 610 and may extend along the first direction. In this embodiment, the first slit 611 may penetrate the side of the guide rail 300 in the width direction of the guide rail 300, that is, in the direction aligned with the Y-axis with reference to Figure 7. The longitudinal direction of the first slit 611 may be aligned with the first direction, that is, with reference to Figure 7, the Z-axis.

[0062] The first slit 611 may include a first end 611b connected to a second slit 612, which will be described later, and a second end 611a located on the opposite side of the first end 611b.

[0063] The first end 611b and the second end 611a may be positioned to be spaced apart from each other along the length of the first slit 611. The first end 611b is positioned on the side surface of the guide rail 300 and may penetrate the side surface of the guide rail 300 along the Y-axis. The second end 611a is positioned on the subframe 200 and may penetrate the top surface of the subframe 200 along the Z-axis. That is, the first slit 611 may be extended such that a portion of the section between the first end 611b and the second end 611a crosses the boundary region between the subframe 200 and the guide rail 300. This allows the stopper 620 to enter the interior of the first slit 611 in a first direction via the second end 611a.

[0064] The second slit 612 may be connected to the first slit 611 and extend along a direction intersecting the first direction. In this embodiment, the second slit 612 may penetrate the side of the guide rail 300 in the width direction of the guide rail 300, i.e., in a direction parallel to the Y-axis. The second slit 612 may be positioned so that its length direction intersects the first direction, i.e., the length direction of the first slit 611. For example, as shown in Figure 7, the second slit 612 may be positioned so that its length direction is parallel to the length direction of the guide rail 300. One end of the second slit 612 may be connected to the first end 611b of the first slit 611.

[0065] The width of the second slit 612 may be smaller than the width of the first slit 611. This allows the second slit 612 to further reduce the range in which the fire extinguishing pipe 400 can rotate around its central axis.

[0066] The stopper 620 protrudes from the heat-sensitive member 500 toward the slit 610 and is inserted into the slit 610. The stopper 620 in this embodiment may be formed to have the shape of a column protruding from the outer surface of the heat-sensitive member 500. The cross-sectional shape of the stopper 620 can be designed to be a variety of shapes other than the circular shape shown in Figure 7.

[0067] The stopper 620 may protrude from the heat-sensitive member 500 in a direction intersecting the first direction. For example, the stopper 620 may be positioned so that its longitudinal direction is aligned with the width direction of the heat-sensitive member 500, i.e., the Y-axis direction. The width of the stopper 620 may be smaller than the width of the slit 610, more specifically, the widths of the first slit 611 and the second slit 612. This allows the stopper 620 to be inserted into the slit 610 when the fire extinguishing pipe 400 is inserted into the guide rail 300.

[0068] Multiple stoppers 620 may be provided. Multiple stoppers 620 may be arranged symmetrically on both sides in the width direction of the heat-sensitive member 500. For example, as shown in Figure 7, the stoppers 620 may be formed in pairs and protrude from both sides in the width direction of the heat-sensitive member 500 in different directions. In this case, each stopper 620 may be individually inserted into a pair of slits 610 located on both sides of the guide rail 300.

[0069] The energy storage device according to this embodiment may further include a second detachment prevention member 700.

[0070] The second detachment prevention member 700 is positioned on the outside of the guide rail 300 and facing the heat-sensitive member 500. The second detachment prevention member 700 can function as a secondary mechanism to prevent the fire extinguishing pipe 400 from detaching from the guide rail 300 if the function of the first detachment prevention member 600 is lost due to damage to the stopper 620 or the like.

[0071] One end of the second detachment prevention member 700 according to this embodiment may be connected to the subframe 200. The other end of the second detachment prevention member 700 may extend from the subframe 200 in a direction intersecting the first direction. For example, the second detachment prevention member 700 may extend from the subframe 200 in a direction parallel to the width direction of the guide rail 300.

[0072] The second detachment prevention member 700 may be positioned on the outside of the guide rail 300 so as to face the open surface 301 along the first direction. That is, the second detachment prevention member 700 may be positioned so as to face the open surface 301 vertically. The second detachment prevention member 700 may be positioned at a predetermined distance from the open surface 301. When the fire extinguishing pipe 400 is inserted inside the guide rail 300, the second detachment prevention member 700 may be positioned so as to face the mounting surface 501 of the heat-sensitive member 500. When the fire extinguishing pipe 400 detaches from the guide rail 300 in a direction opposite to the first direction due to an external force, the second detachment prevention member 700 can prevent the fire extinguishing pipe 400 from detaching by contacting the mounting surface 501.

[0073] Multiple second detachment prevention members 700 may be provided. Multiple second detachment prevention members 700 may be arranged symmetrically on both sides of the guide rail 300. Alternatively, multiple second detachment prevention members 700 may be arranged in multiple rows along the length of the guide rail 300. The second detachment prevention members 700 may be spaced apart from the first detachment prevention member 600 along the length of the guide rail 300. The second detachment prevention members 700 may be positioned so as not to come into contact with the fire extinguishing pipe 400 and the heat-sensitive member 500 when the stopper 620 is inserted into the first slit 611 in the first direction.

[0074] Figures 10 to 12 schematically show the process by which fire extinguishing pipes are assembled onto guide rails in an energy storage device according to the first embodiment of the present invention, and Figure 13 shows the state in which an external force is applied to the fire extinguishing pipes in the state shown in Figure 12.

[0075] Referring to Figures 10 to 12, the fire extinguishing pipe 400 moves along the first direction while positioned to face the open surface 301 of the guide rail 300. In this case, the stopper 620 and the second end 611a of the slit 610 can be maintained in a position facing each other along the first direction.

[0076] As the fire extinguishing pipe 400 moves beyond a set distance in the first direction, the stopper 620 enters the interior of the first slit 611 via the second end 611a.

[0077] Subsequently, the stopper 620 moves along the length of the first slit 611 toward the first end 611b, and the stopper 620 is positioned at the first end 611b as the fire extinguishing pipe 400 is fully inserted into the guide rail 300.

[0078] Subsequently, the fire extinguishing pipe 400 slides along the length of the guide rail 300, and the stopper 620 enters the interior of the second slit 612 via the first end 611b.

[0079] The movement of the fire extinguishing pipe 400 is stopped when the stopper 620 comes into contact with the end of the second slit 612.

[0080] Referring to Figure 13, when a rotational or torsional load is applied to the fire extinguishing pipe 400 with the stopper 620 inserted inside the second slit 612, the stopper 620 comes into contact with the inner surface of the second slit 612.

[0081] The rotational force applied to the fire extinguishing pipe 400 is offset by the reaction force acting between the stopper 620 and the inner surface of the second slit 612, allowing the fire extinguishing pipe 400 to maintain its initial angle without rotating around its central axis.

[0082] Furthermore, when an external force is applied to the fire extinguishing pipe 400 in the opposite direction to the first direction while the stopper 620 is inserted inside the second slit 612, the stopper 620 comes into contact with the inner surface of the second slit 612.

[0083] The external force applied to the fire extinguishing pipe 400 is offset by the reaction force acting between the stopper 620 and the inner surface of the second slit 612, allowing the fire extinguishing pipe 400 to maintain its initial position without moving in the direction opposite to the first direction.

[0084] On the other hand, if the fire extinguishing pipe 400 moves in the opposite direction to the first direction due to damage to the stopper 620, the second detachment prevention member 700 can contact the mounting surface of the heat-sensitive member 500 and secondarily prevent the fire extinguishing pipe 400 from detaching from the guide rail 300.

[0085] The following describes an energy storage device according to a second embodiment of the present invention.

[0086] An energy storage device according to a second embodiment of the present invention may include a rack frame 100, a subframe 200, a guide rail 300, a fire extinguishing pipe 400, a heat-sensitive member 500, a first detachment prevention member 600, and a second detachment prevention member 700.

[0087] The energy storage device according to the second embodiment of the present invention may be configured to differ from the energy storage device according to the first embodiment of the present invention only in the detailed configuration of the first detachment prevention member 600.

[0088] Accordingly, in describing the energy storage device according to the second embodiment of the present invention, only the detailed configuration of the first detachment prevention member 600, which was not described in the energy storage device according to the first embodiment of the present invention, will be described.

[0089] The remaining components of the energy storage device according to the second embodiment of the present invention can be directly applied to the energy storage device according to the first embodiment of the present invention.

[0090] Figure 14 is an exploded perspective view schematically showing the configuration of the first detachment prevention member according to the second embodiment of the present invention, and Figure 15 is a plan view schematically showing the configuration of the first detachment prevention member according to the second embodiment of the present invention.

[0091] Referring to Figures 14 and 15, the first detachment prevention member 600 according to this embodiment may include a groove 630 and a stopper 640.

[0092] The groove 630 may be formed in the form of a groove that is concavely formed from the outer surface of the heat-sensitive member 500. More specifically, the groove 630 may be formed as a concave depression from the side of the heat-sensitive member 500 facing the side of the guide rail 300, in the width direction of the heat-sensitive member 500, that is, in a direction aligned with the Y-axis direction with reference to Figure 1.

[0093] The groove 630 may extend along the longitudinal direction of the heat-sensitive member 500, that is, along the direction aligned with the X-axis direction with reference to Figure 1. The length of the groove 630 may be shorter than the length of the heat-sensitive member 500. In this case, one end of the groove 630 may penetrate one end of the heat-sensitive member 500 in the longitudinal direction. This allows one end of the groove 630 to be open to the longitudinal direction of the heat-sensitive member 500, and the other end of the groove 630 to be closed to the longitudinal direction of the heat-sensitive member 500.

[0094] The grooves 630 may be provided in multiples. Multiple grooves 630 may be arranged symmetrically on both sides of the heat-sensitive member 500 in the width direction. For example, as shown in Figure 14, the grooves 630 may be formed in pairs and recessed from both sides of the heat-sensitive member 500 in the width direction, facing each other.

[0095] The stopper 640 may protrude from the side of the guide rail 300 toward the internal space of the guide rail 300. More specifically, the stopper 640 may protrude from the side of the guide rail 300 in the width direction of the guide rail 300, i.e., in a direction aligned with the Y-axis direction with respect to Figure 1. The width of the stopper 640 may be less than the width of the groove 630. This allows the stopper 640 to be inserted into the groove 630 when the fire extinguishing pipe 400 is inserted into the guide rail 300.

[0096] Multiple stoppers 640 may be provided. Multiple stoppers 640 may be arranged symmetrically on both sides in the width direction of the guide rail 300. Multiple stoppers 640 may be arranged in multiple rows along the length direction of the guide rail 300.

[0097] Figures 16 to 18 schematically show the process by which fire extinguishing pipes are assembled onto guide rails in an energy storage device according to a second embodiment of the present invention, and Figure 19 shows the state in which an external force is applied to the fire extinguishing pipes in the state shown in Figure 18.

[0098] Referring to Figures 16 to 18, the fire extinguishing pipe 400 moves along the first direction while positioned to face the open surface 301 of the guide rail 300. In this case, one end of the groove 630 and the stopper 640 can be maintained in an alternating position in a direction intersecting the first direction.

[0099] As the fire extinguishing pipe 400 is fully inserted into the guide rail 300, one end of the groove 630 and the stopper 640 are positioned to face each other along the length of the guide rail 300.

[0100] Subsequently, the fire extinguishing pipe 400 slides along the length of the guide rail 300, and the stopper 640 is inserted into the groove 630 through one end of the groove 630.

[0101] When the fire extinguishing pipe 400 moves beyond a set distance in the longitudinal direction of the guide rail 300, the stopper 640 comes into contact with the other end of the groove 630, and the sliding movement of the fire extinguishing pipe 400 is stopped.

[0102] Referring to Figure 19, when a rotational or torsional load is applied to the fire extinguishing pipe 400 with the stopper 640 inserted inside the groove 630, the stopper 640 comes into contact with the inner surface of the groove 630.

[0103] The rotational force applied to the fire extinguishing pipe 400 is offset by the reaction force acting between the stopper 640 and the inner surface of the groove 630, allowing the fire extinguishing pipe 400 to maintain its initial angle without rotating around its central axis.

[0104] Furthermore, when an external force is applied to the fire extinguishing pipe 400 in the opposite direction to the first direction while the stopper 640 is inserted inside the groove 630, the stopper 640 comes into contact with the inner surface of the groove 630.

[0105] External forces applied to the fire extinguishing pipe 400 are offset by the reaction force acting between the stopper 640 and the inner surface of the groove 630, allowing the fire extinguishing pipe 400 to maintain its initial position without moving in the direction opposite to the first direction.

[0106] On the other hand, if the fire extinguishing pipe 400 moves in the opposite direction to the first direction due to damage to the stopper 640, the second detachment prevention member 700 can contact the mounting surface of the heat-sensitive member 500 and secondarily prevent the fire extinguishing pipe 400 from detaching from the guide rail 300.

[0107] Although the present invention has been described with reference to the embodiments shown in the drawings, these are merely illustrative examples, and anyone with ordinary skill in the art will understand that a variety of modifications and equivalent other embodiments are possible.

[0108] Therefore, the scope of technical protection of the present invention should be defined by the following claims. [Explanation of symbols]

[0109] B Battery Module 100 Rack Frame 200 Subframe 300 Guide Rail 301 Open surface 302 Through Hole 400 Fire extinguishing piping 401 Injection Hole 500 Heat-sensitive components 501 Mounting surface 502 Thin film section 600 First detachment prevention member 610 Slit 611 First Slit 611a 2nd end 611b First end 612 Second Slit 620 Stopper 630 Grooves 640 Stopper 700 Second detachment prevention member

Claims

1. Rack frame for housing battery modules; A subframe fixed to the rack frame and facing the battery module; A guide rail formed in a concave shape from one surface of the subframe; A fire extinguishing pipe, positioned inside the aforementioned guide rail and equipped with spray holes for spraying fire extinguishing liquid; A heat-sensitive member positioned to cover the fire extinguishing pipe and opening and closing the spray hole in conjunction with changes in temperature; and A first detachment prevention member is provided between the guide rail and the heat-sensitive member to prevent the fire extinguishing pipe from detaching from the guide rail; The first detachment prevention member is A slit formed through the aforementioned guide rail; and An energy storage device characterized by including a stopper that protrudes from the heat-sensitive member toward the slit and is inserted into the slit.

2. The energy storage device according to claim 1, characterized in that the width of the stopper is smaller than the width of the slit.

3. The energy storage device according to claim 1, characterized in that the slits are provided in multiple quantities and are arranged symmetrically on both sides of the guide rail, and the stoppers are provided in multiple quantities and are arranged symmetrically on both sides of the heat-sensitive member.

4. The fire extinguishing pipe is inserted into the guide rail in a first direction through an open surface formed in the guide rail, The aforementioned slit is A first slit extending along the first direction; and The energy storage device according to claim 1, further comprising: a second slit connected to the first slit and extending along a direction intersecting the first direction;

5. The energy storage device according to claim 4, wherein the first slit includes a first end connected to the second slit and a second end located on the opposite side of the first end, and the second end penetrates the subframe.

6. The energy storage device according to claim 4, characterized in that the second slit extends along the longitudinal direction of the guide rail.

7. The energy storage device according to claim 4, characterized in that the width of the second slit is smaller than the width of the first slit.

8. Rack frame for housing battery modules; A subframe fixed to the rack frame and facing the battery module; A guide rail formed in a concave shape from one surface of the subframe; A fire extinguishing pipe, positioned inside the aforementioned guide rail and equipped with spray holes for spraying fire extinguishing liquid; A heat-sensitive member positioned to cover the fire extinguishing pipe and opening and closing the spray hole in conjunction with changes in temperature; and A first detachment prevention member is provided between the guide rail and the heat-sensitive member to prevent the fire extinguishing pipe from detaching from the guide rail; The first detachment prevention member is Grooves formed in a concave shape from the outer surface of the heat-sensitive member; and An energy storage device characterized by including a stopper that protrudes from the guide rail and is inserted into the groove.

9. The energy storage device according to claim 8, characterized in that the grooves are provided in multiple quantities and are arranged symmetrically on both sides of the heat-sensitive member, and the stoppers are provided in multiple quantities and are arranged symmetrically on both sides of the guide rail.

10. The energy storage device according to claim 8, characterized in that the width of the stopper is smaller than the width of the groove.

11. The energy storage device according to claim 8, characterized in that the groove extends along the longitudinal direction of the heat-sensitive member.

12. The energy storage device according to claim 8, characterized in that the length of the groove is shorter than the length of the heat-sensitive member.

13. The energy storage device according to claim 12, characterized in that one end of the groove penetrates one end of the heat-sensitive member.

14. The energy storage device according to any one of claims 1 to 13, further comprising: a second detachment prevention member disposed on the outside of the guide rail and facing the heat-sensitive member.

15. The energy storage device according to claim 14, characterized in that the first detachment prevention member and the second detachment prevention member are spaced apart along the longitudinal direction of the guide rail.

16. The energy storage device according to claim 14, characterized in that the second detachment prevention member is provided in multiple units and is arranged symmetrically on both sides of the guide rail.

17. The energy storage device according to claim 14, characterized in that the fire extinguishing pipe is inserted into the guide rail in a first direction through an open surface formed in the guide rail, and the open surface and the second detachment prevention member are arranged to face each other along the first direction.

18. The energy storage device according to claim 17, characterized in that the second detachment prevention member extends from the subframe in a direction intersecting the first direction.

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