Energy storage system

Abstract

An energy storage system is configured to reduce the internal pressure of a container and prevent flame exposure to the outside when a battery fire occurs. The energy storage system comprises a battery rack in which at least one battery module is accommodated; a container in which the battery rack is accommodated; a conduit in the container; and a flame blocking portion in the opening of the duct and configured to block a flame generated inside the container from being exposed to the outside of the container through the duct. According to the present disclosure, in response to a battery fire occurring in the container, a flame blocking portion mounted in the duct may block (or at least mitigate) a flame generated inside the container from being exposed to the outside of the container through the duct.

Description

Technical Field

[0001] Aspects of embodiments of the present disclosure relate to an energy storage system. Background Art

[0002] Generally, as the demand for portable electronic products such as laptop computers, video cameras, and mobile phones has increased rapidly and the commercialization of robots, electric vehicles, etc. has started in earnest, research on high-performance secondary batteries capable of being repeatedly charged and discharged has been actively conducted.

[0003] Such secondary batteries are widely used not only for driving or energy storage in small devices such as portable electronic devices, but also for driving or energy storage in large and medium-sized devices such as electric vehicles or energy storage systems (ESSs).

[0004] In the case of an ESS in which two or more battery modules are sealed using a container, when a battery catches fire, the container may be damaged due to an increase in the internal pressure of the container. In addition, when the flame is exposed to the outside of the container, the fire may spread to the surrounding area.

[0005] The above information disclosed in the technology forming the background art of the present disclosure is only intended to enhance the understanding of the background art of the present disclosure and may therefore include information that does not constitute related art. Summary of the Utility Model

[0006] Aspects of embodiments of the present disclosure aim to provide an energy storage system configured to reduce the internal pressure of a container and prevent the exposure of a flame when a battery catches fire.

[0007] These and other aspects and features of the present disclosure will be described in the following description of some embodiments of the present disclosure or will be apparent from the following description of some embodiments of the present disclosure.

[0008] According to an aspect of the present disclosure, an energy storage system includes: a battery rack in which at least one battery module is accommodated; a container in which the battery rack is accommodated; a pipe in the container; and a flame blocking part in an opening of the pipe and configured to block a flame generated inside the container from being exposed to the outside of the container through the pipe.

[0009] The flame blocking part may include two or more flame blocking parts spaced apart from each other in an extending direction of the pipe.

[0010] The flame blocking part may include two or more filter members stacked in an extending direction of the pipe.

[0011] The filter member may have a mesh structure.

[0012] The filter member may include: a first filter member spaced apart from each other in the extending direction of the pipe; and a second filter member having an air gap with a different size from that of the first filter member between the first filter members.

[0013] The flame blocking portion may further include a support member stacked on and supporting the filter member.

[0014] The support member may include: a first support member on the first surface of the filter member; and a second support member on the second surface of the filter member.

[0015] The flame blocking portion may be detachably coupled to the pipe.

[0016] A notch may be provided in the side wall of the pipe, and a part of the flame blocking portion is disposed in the notch.

[0017] The energy storage system may further include a cover coupled to the pipe and covering the opening of the pipe.

[0018] A gap may be between the cover and the pipe, and the gas inside the container is discharged through the gap.

[0019] The energy storage system may further include a pressure reducing member in the opening of the pipe and configured to prevent the internal pressure of the container from increasing to a set pressure or more.

[0020] The pressure reducing member may have a louver structure.

[0021] The pressure reducing member may include: a first pressure reducing member configured to direct the direction of the airflow moving through the pipe to a first direction; and a second pressure reducing member stacked on the first pressure reducing member, the second pressure reducing member being configured to direct the direction of the airflow passing through the first pressure reducing member to a second direction different from the first direction.

[0022] The energy storage system may further include a flame direction changing member between the battery rack and the pipe and configured to change the direction of the flame.

[0023] The flame direction changing member may include: a flame blocking plate between the battery rack and the pipe and spaced apart from the pipe; a protrusion at the edge of the flame blocking plate and protruding toward the orientation of the pipe; and a guiding path between the flame blocking plate, the protrusion and the pipe and configured to guide the movement of the flame. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings attached to this specification illustrate some embodiments of the present disclosure and further describe the aspects and features of the present disclosure together with the detailed description of the present disclosure. However, the present disclosure should not be construed as being limited to the drawings:

[0025] By describing in detail exemplary embodiments of the present disclosure with reference to the accompanying drawings, the above and other objects, features, and advantages of the present disclosure will become more apparent to those of ordinary skill in the art. In the accompanying drawings:

[0026] Figure 1 is a cross-sectional view schematically illustrating an energy storage system according to a first embodiment of the present disclosure;

[0027] Figure 2 is a cross-sectional view schematically illustrating a flame blocking part installed in a pipeline of the energy storage system in a stacked manner according to a first embodiment of the present disclosure;

[0028] Figure 3 is a cross-sectional view schematically illustrating a state in which a flame blocking part is disposed in a notch formed in a pipeline of the energy storage system according to a first embodiment of the present disclosure;

[0029] Figure 4 is an exploded perspective view schematically illustrating a flame blocking part in the energy storage system according to a first embodiment of the present disclosure;

[0030] Figure 5 is a cross-sectional view schematically illustrating a lid coupled to a pipeline in the energy storage system according to a second embodiment of the present disclosure;

[0031] Figure 6 is a cross-sectional view schematically illustrating a pressure reducing member installed in a pipeline of the energy storage system according to a third embodiment of the present disclosure;

[0032] Figure 7 and Figure 8 is a cross-sectional view schematically illustrating a pressure reducing member installed in a pipeline of the energy storage system according to a fourth embodiment of the present disclosure; and

[0033] Figure 9 is a cross-sectional view schematically illustrating a flame direction changing member in the energy storage system according to a fifth embodiment of the present disclosure. Detailed Description of Specific Embodiments

[0034] Herein, some embodiments of the present disclosure will be further described in detail with reference to the accompanying drawings. The terms or words used in this specification and claims should not be construed as limited to the general meaning or dictionary meaning, and should be interpreted as meanings and concepts consistent with the technical idea of the present disclosure based on the principle that the inventor can be his / her own lexicographer to appropriately define the terms.

[0035] The embodiments described in this specification and the configurations shown in the accompanying drawings are provided as some example embodiments of the present disclosure and do not represent all the technical ideas, aspects, and features of the present disclosure. Therefore, it should be understood that various equivalents and modifications that can replace or modify the embodiments described herein may exist at the time of filing this application.

[0036] It should be understood that when an element or layer is referred to as being "on", "connected to", or "coupled to" another element or layer, it can be directly on, directly connected to, or directly coupled to the other element or layer, or one or more intervening elements or layers may also be present. When an element or layer is referred to as being "directly on", "directly connected to", or "directly coupled to" another element or layer, no intervening element or layer is present. For example, when the first element is described as being "coupled" or "connected" to the second element, the first element can be directly coupled or connected to the second element, or the first element can be indirectly coupled or connected to the second element via one or more intervening elements.

[0037] In the figures, for clarity of illustration, the sizes of various elements, layers, etc. may be enlarged. The same reference numerals indicate the same or similar elements. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Further, the use of "may" when describing embodiments of the present disclosure relates to "one or more embodiments of the present disclosure". Expressions such as "at least one of..." and "any one of..." before a list of elements modify the entire list of elements and do not modify a single element in the list. When a phrase such as "at least one of A, B, and C", "at least one of A, B, or C", "at least one selected from the group consisting of A, B, and C", or "at least one selected from among A, B, and C" is used to specify a list of elements A, B, and C, the phrase can refer to any and all suitable combinations or subsets of A, B, and C, such as A, B, C, A and B, A and C, B and C, or A and B and C. As used herein, the terms "use", "using", and "used" may be considered to be synonymous with the terms "utilize", "utilizing", and "utilized", respectively. As used herein, the terms "substantially", "about", and similar terms are used as approximate terms rather than terms of degree and are intended to account for the inherent variations in measured or calculated values that would be recognized by a person of ordinary skill in the art.

[0038] It should be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below may be referred to as a second element, component, region, layer or section without departing from the teachings of the exemplary embodiments.

[0039] For ease of description, spatial relative terms such as "beneath", "below", "lower", "above" and "upper" may be used herein to describe the relationship of one element or feature to another element or feature as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as "beneath" or "below" another element or feature may be oriented "above" or "over" the other element or feature. Thus, the term "below" may encompass both an orientation of above and below. The device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and the spatial relative descriptors used herein should be interpreted accordingly.

[0040] The terms used herein are for the purpose of describing embodiments of the present disclosure and are not intended to limit the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. It should be further understood that when the terms "includes", "including", "comprises" and / or "comprising" are used in this specification, they specify the presence of the stated features, integers, steps, operations, elements, components and / or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0041] In addition, any numerical range disclosed and / or recited herein is intended to include all sub-ranges of the same numerical precision that are included within the recited range. For example, the range of "1.0 to 10.0" is intended to include all sub-ranges between (and including) the recited minimum value of 1.0 and the recited maximum value of 10.0, i.e., having a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as, for example, 2.4 to 7.6. Any maximum numerical limitation recited herein is intended to include all lower numerical limitations contained therein, and any minimum numerical limitation recited in this specification is intended to include all higher numerical limitations contained therein. Accordingly, the applicant reserves the right to amend this specification, including the claims, to expressly recite any sub-ranges that are included within the ranges expressly recited herein.

[0042] Referring to two compared elements, features, etc. as "the same" may mean that they are "substantially the same". Thus, the phrase "substantially the same" may include cases having a deviation considered to be low in the art, for example, a deviation of 5% or less. In addition, when a certain parameter is said to be uniform in a given region, this may mean that it is uniform in terms of the average value.

[0043] Throughout the specification, unless otherwise stated, each element may be singular or plural.

[0044] When any element is referred to as being disposed (or located or positioned) "above (or below)" or "on (or under)" a component, this may mean that the any element is placed in contact with the upper surface (or lower surface) of the component, or it may mean that another component may be interposed between the component and any element disposed (or located or positioned) above (or below) the component.

[0045] In addition, it should be understood that when an element is referred to as being "coupled", "linked", or "connected" to another element, the elements may be directly "coupled", "linked", or "connected" to each other, or one or more intermediate elements may be present therebetween, through which the element may be "coupled", "linked", or "connected" to another element. In addition, when a component is referred to as being "electrically coupled" to another component, the component may be directly electrically connected to another component, or one or more intermediate components may be present therebetween such that one component is indirectly electrically connected to another component.

[0046] Throughout the specification, unless otherwise stated, when stating "A and / or B", this may mean A, B, or A and B. In other words, "and / or" includes any or all combinations of the recited items. Unless otherwise indicated, when stating "C to D", this may mean greater than or equal to C and less than or equal to D.

[0047] The terms used in this specification are for describing embodiments of the present disclosure and are not intended to limit the present disclosure.

[0048] Figure 1 is a cross-sectional view schematically illustrating an energy storage system according to a first embodiment of the present disclosure, Figure 2 is a cross-sectional view schematically illustrating a flame blocking part according to a first embodiment of the present disclosure installed in a pipe in the energy storage system in a stacked manner, Figure 3 is a cross-sectional view schematically illustrating a state in which a flame blocking part according to a first embodiment of the present disclosure is placed in a notch in a pipe in the energy storage system, and Figure 4 is an exploded perspective view schematically illustrating a flame blocking part in the energy storage system according to a first embodiment of the present disclosure.

[0049] Refer to Figures 1 to 4 , an energy storage system 1 according to a first embodiment of the present disclosure includes a battery rack 100, a container 200 that houses the battery rack 100, a pipe 300 in the container 200, and a flame blocking part 400 in the pipe 300.

[0050] The battery rack 100 is the energy source of the energy storage system 1 according to the first embodiment of the present disclosure and may include one or more battery racks 100.

[0051] A plurality of battery modules 110 are housed in the battery rack 100. The battery rack 100 includes at least a plurality of battery modules 110 arranged in the vertical direction. The battery modules 110 may include a plurality of battery modules 110 stacked in the height direction of the battery rack 100.

[0052] In this embodiment, the battery module 110 includes one or more battery cells. The battery module 110 may include a plurality of battery cells electrically connected to each other. In one embodiment, the battery cell may be a lithium-ion battery. In one or more embodiments, the battery cell is a secondary battery and may be a pouch-type secondary battery, a cylindrical secondary battery, or a prismatic secondary battery.

[0053] The container 200 houses the battery rack 100 therein. The container 200 may have the shape of a box and have an internal space therein. The container 200 may cover and seal one or more battery racks 100 in an airtight manner.

[0054] The container 200 may be configured to withstand fire or explosion pressure in a dangerous situation such as a fire caused by an abnormality of the battery modules 110 stored in the battery rack 100 or an explosion of the battery modules 110. In one or more embodiments, the container 200 may include a steel plate material configured to withstand explosion pressure and the like.

[0055] The pipe 300 is provided in the container 200. The pipe 300 can be located on the upper side of the container 200. The pipe 300 can pass through the upper surface of the container 200 and extend in the vertical direction of the container 200.

[0056] The cutout 310 (see Figure 3 ) can be provided in the side wall of the pipe 300, and a part of the flame blocking portion 400 is disposed in the cutout 310. The cutout 310 can be formed to pass through the side wall of the pipe 300 so that the flame blocking portion 400 can be slidably inserted into the pipe 300. The cutout 310 can extend in the circumferential direction of the pipe 300. The cutout 310 can include a plurality of cutouts 310 spaced apart from each other in the extending direction (e.g., vertical direction) of the pipe 300.

[0057] The flame blocking portion 400 is installed in the opening of the pipe 300. The flame blocking portion 400 is configured to block the flame generated inside the container 200 (e.g., due to the fire in the battery module 110) from being exposed to the outside of the container 200 through the pipe 300. In one embodiment, the flame blocking portion 400 can include a plurality of flame blocking portions 400 spaced apart from each other in the extending direction (e.g., vertical direction) of the pipe 300. The flame blocking portion 400 can be detachably coupled to the pipe 300.

[0058] The flame blocking portion 400 can include a plurality of filter members 410. The filter members 410 can be stacked in the extending direction (e.g., vertical direction) of the pipe 300. The filter members 410 can have a mesh structure. The filter members 410 can contain copper (Cu) or stainless steel (SUS) materials configured to cool the flame. The filter members 410 can include a first filter member 411 and a second filter member 412. The first filter member 411 can be a pair of first filter members 411 spaced apart from each other in the extending direction (e.g., vertical direction) of the pipe 300. In one or more embodiments, the first filter member 411 can have a structure of approximately 30 mesh.

[0059] The first filter member 411 can include a plurality of unit filter members. In one embodiment, two unit filter members can be stacked in the first filter member 411.

[0060] The second filter member 412 is between a pair of first filter members 411. The second filter member 412 may include (or have) an air gap of a different size than the first filter members 411 (e.g., the first filter members 411 and the second filter member 412 may have different mesh sizes). In one embodiment, the second filter member 412 may have a structure of approximately 10 mesh. The second filter member 412 may include a plurality of unit filter members. In one or more embodiments, twenty-four (24) unit filter members may be stacked in the second filter member 412.

[0061] The flame barrier portion 400 may further include a support member 420. The support member 420 may be stacked on the plurality of stacked filter members 410.

[0062] The support member 420 may have a lattice shape. The support member 420 may be configured to support the filter member 410 and protect the filter member 410.

[0063] The support member 420 may include a first support member 421 and a second support member 422. The first support member 421 may be on a first surface 410a of the filter member 410. The first surface 410a may be the outer surface of the first filter member 411 of the pair of first filter members 411 that faces the outside of the container 200. The second support member 422 may be on a second surface 410b of the filter member 410. The second surface 410b may be the outer surface of the first filter member 411 of the pair of first filter members 411 that faces the inside of the container 200 (e.g., the first support member 421 and the second support member 422 may be on opposite sides of the filter member 410).

[0064] The flame barrier portion 400 may further include a pair of frames 430 that are disposed on the first support member 421 and the second support member 422 and are coupled to each other. The frames 430 may be formed in the shape of a framework and have an open central portion (e.g., a picture frame configuration). The pair of frames 430 may be coupled to each other by fastening members such as bolts and may contact the edges of the first support member 421 and the edges of the second support member 422.

[0065] Figure 5 is a cross-sectional view schematically illustrating a lid according to a second embodiment of the present disclosure being coupled to a pipe in an energy storage system.

[0066] See Figure 5 According to the second embodiment of the present disclosure, the energy storage system 2 may include a battery rack 100 (as Figure 1 shown), a container 200, a pipe 300, a flame barrier portion 400, and a lid 500.

[0067] When describing the energy storage system 2 according to the second embodiment of the present disclosure, only the cover 500 that is not described in the energy storage system 1 according to the first embodiment of the present disclosure will be described.

[0068] The description of the energy storage system 1 according to the first embodiment of the present disclosure can be directly applied to the remaining components of the energy storage system 2 according to the second embodiment of the present disclosure.

[0069] The cover 500 can be coupled to the pipe 300 and cover the opening of the pipe 300. The cover 500 can be located outside the container 200. The cover 500 can overhang a part of the side wall of the pipe 300 and / or overlap with a part of the side wall of the pipe 300. The cover 500 can be configured to prevent external foreign matters such as moisture from being introduced into the container 200 through the pipe 300.

[0070] A gap G can be formed between the cover 500 and the pipe 300, and the gas inside the container 200 is discharged through the gap G. The ignition gas generated inside the container 200 and passing through the flame blocking part 400 can be discharged to the outside of the container 200 through the gap G.

[0071] Figure 6 is a cross-sectional view schematically illustrating a pressure reducing member according to the third embodiment of the present disclosure installed in a pipe in an energy storage system.

[0072] See Figure 6 , the energy storage system 3 according to the third embodiment of the present disclosure can include a battery rack 100 (as Figure 1 shown), a container 200, a pipe 300, a flame blocking part 400, a cover 500, and a pressure reducing member 600.

[0073] When describing the energy storage system 3 according to the third embodiment of the present disclosure, only the pressure reducing member 600 that is not described in the energy storage system 1 according to the first embodiment of the present disclosure or the energy storage system 2 according to the second embodiment of the present disclosure will be described.

[0074] The description of the energy storage system 1 according to the first embodiment of the present disclosure or the energy storage system 2 according to the second embodiment of the present disclosure can be directly applied to the remaining components of the energy storage system 3 according to the third embodiment of the present disclosure.

[0075] The pressure reducing member 600 can be installed in the opening of the pipe 300. The pressure reducing member 600 can be configured to allow the gas inside the container 200 to be discharged to the outside of the container 200 and prevent (or at least mitigate) the internal pressure of the container 200 from increasing to a set pressure or greater. The pressure reducing member 600 can include a pressure relief panel, a deflagration panel, a pressure relief valve, etc. The pressure reducing member 600 can be located above the flame blocking part 400 and can face the outside of the container 200.

[0076] Figure 7 and Figure 8 is a cross-sectional view schematically illustrating a pressure relief member according to a fourth embodiment of the present disclosure installed in a pipe of an energy storage system.

[0077] See Figure 7 and Figure 8 , an energy storage system 4 according to a fourth embodiment of the present disclosure may include a battery rack 100 (as Figure 1 shown), a container 200, a pipe 300, a flame blocking portion 400, a cover 500, and a pressure relief member 600.

[0078] The energy storage system 4 according to a fourth embodiment of the present disclosure may be configured to be different from the energy storage system 3 according to a third embodiment of the present disclosure only in the detailed configuration of the pressure relief member 600.

[0079] When describing the energy storage system 4 according to a fourth embodiment of the present disclosure, only the detailed configuration of the pressure relief member 600 that is different from the pressure relief member in the energy storage system 3 according to a third embodiment of the present disclosure will be described.

[0080] The description of the energy storage system 1 according to a first embodiment of the present disclosure or the energy storage system 2 according to a second embodiment of the present disclosure can be directly applied to the remaining components of the energy storage system 4 according to a fourth embodiment of the present disclosure.

[0081] The pressure relief member 600 may have a louver structure. The pressure relief member 600 having a louver structure may be located below the flame blocking portion 400 and may face the interior of the container 200. The pressure relief member 600 may include at least one pressure relief plate 600a (e.g., a plurality of pressure relief plates 600a) formed with at least one louver perforation 600b (e.g., a plurality of louver perforations 600b).

[0082] As Figure 8 shown, the pressure relief member 600 may include a first pressure relief member 610 and a second pressure relief member 620. The first pressure relief member 610 may be configured to direct the direction of the airflow moving through the pipe 300 to a first direction F1 (e.g., to the right in Figure 8 ). The first pressure relief member 610 may be configured to direct the moving direction of the airflow such that the airflow does not move straight toward the flame blocking portion 400 but moves obliquely in the first direction F1. The second pressure relief member 620 may be stacked on the first pressure relief member 610 (e.g., the second pressure relief member 620 may be above the first pressure relief member 610 and spaced apart from the first pressure relief member 610 by a certain gap). The second pressure relief member 620 may be configured to direct the direction of the airflow passing through the first pressure relief member 610 to a second direction F2 different from the first direction F1 (e.g., in Figure 8(towards the left). The second pressure reducing member 620 may be configured to guide the airflow to move obliquely in a second direction F2 that is opposite to the first direction F1. Accordingly, the airflow passing through the first pressure reducing member 610 and the second pressure reducing member 620 may move in a zigzag pattern.

[0083] Figure 9 is a cross-sectional view schematically illustrating a flame direction changing member in an energy storage system according to a fifth embodiment of the present disclosure.

[0084] Refer to Figure 9 , the energy storage system 5 according to the fifth embodiment of the present disclosure may include a battery rack 100 (as Figure 1 shown), a container 200, a pipe 300, a flame blocking portion 400, a cover 500, and a flame direction changing member 700.

[0085] When describing the energy storage system 5 according to the fifth embodiment of the present disclosure, only the flame direction changing member 700 that is not described in the energy storage system 1 according to the first embodiment of the present disclosure or the energy storage system 2 according to the second embodiment of the present disclosure will be described.

[0086] The descriptions of the energy storage system 1 according to the first embodiment of the present disclosure or the energy storage system 2 according to the second embodiment of the present disclosure may be directly applied to the remaining components of the energy storage system 5 according to the fifth embodiment of the present disclosure.

[0087] The flame direction changing member 700 may be installed between the battery rack 100 and the pipe 300. The flame direction changing member 700 may be configured to change the direction of the flame such that the flame moving towards the pipe 300 detours (changes direction). The flame direction changing member 700 may be configured to reduce the speed of the flame and achieve cooling of the flame such that the high-speed flame is not directly led to the flame blocking portion 400.

[0088] In one embodiment, the flame direction changing member 700 may include a flame blocking plate 710, a protrusion 720 connected to the flame blocking plate 710, and a guiding path 730.

[0089] The flame blocking plate 710 may be located between the battery rack 100 and the pipe 300. The flame blocking plate 710 may be spaced apart from the pipe 300. The flame blocking plate 710 may have a flat plate shape (e.g., a disk shape) and may be configured to block the opening between the battery rack 100 and the pipe 300.

[0090] The protrusion 720 may be provided at the edge of the flame baffle 710. The protrusion 720 may be integrally formed with the flame baffle 710. The protrusion 720 may protrude upward from the flame baffle 710 toward the duct 300 by a set height in the direction along which the duct 300 extends. The protrusion 720 may be spaced apart from the duct 300 and may extend in the circumferential direction of the flame baffle 710 and around the circumference of at least the lower portion of the duct 300.

[0091] A guiding path 730 is formed between the flame baffle 710, the protrusion 720, and the duct 300. The guiding path 730 may be configured to guide the movement of the flame.

[0092] The direction of the flame blocked by the flame baffle 710 is changed (deflected) to the direction of the edge where the protrusion 720 of the flame baffle 710 is located, and the direction of the flame blocked by the protrusion 720 is changed (deflected) such that the flame moves through the gap between the duct 300 and the protrusion 720, and then the flame is introduced into the duct 300.

[0093] According to the present disclosure, in response to a battery fire occurring in a container, a flame blocking portion installed in a duct may block (or at least mitigate) the flame generated inside the container from being exposed to the outside of the container through the duct.

[0094] According to the present disclosure, a pressure reducing member installed in the duct may be used to suppress a rapid increase in the pressure inside the container to prevent damage to the container.

[0095] According to the present disclosure, since the flame can be allowed to detour (deflect) such that the high-speed flame is not directly directed to the flame blocking portion, the speed of the flame can be reduced, and cooling of the flame can be achieved.

[0096] However, the effects obtainable through the present disclosure are not limited to the above effects, and other technical effects not mentioned will be clearly understood by those skilled in the art from the description of the present disclosure.

[0097] Although the present disclosure has been described with reference to the embodiments shown in the drawings, these embodiments are merely illustrative, and it should be understood that those skilled in the art can derive various variations and equivalent other embodiments based on the embodiments.

Claims

1. An energy storage system, characterized in that, The energy storage system includes: a battery rack including at least one battery module; a container that houses the battery rack; a pipe in the container; and a flame blocking portion in an opening of the pipe, the flame blocking portion being configured to block a flame generated inside the container from being exposed to the outside of the container through the pipe.

2. The energy storage system according to claim 1, wherein The flame blocking portion includes a plurality of flame blocking portions spaced apart from each other in an extending direction of the pipe.

3. The energy storage system according to claim 1, wherein The flame blocking portion includes a plurality of filter members stacked in the extending direction of the pipe.

4. The energy storage system according to claim 3, wherein Each of the plurality of filter members has a mesh structure.

5. The energy storage system according to claim 4, characterized in that, The plurality of filter members includes: a first filter member spaced apart from each other in the extending direction of the pipe; and a second filter member between the first filter members, each of the second filter members having an air gap with a different size from that of the first filter member.

6. The energy storage system according to claim 3, characterized in that, The flame blocking portion further includes a support member stacked on the plurality of filter members and supporting the plurality of filter members.

7. The energy storage system according to claim 6, wherein The support member includes: a first support member on a first surface of the filter member; and a second support member on a second surface of the filter member.

8. The energy storage system according to claim 1, characterized in that The flame blocking portion is detachably coupled to the pipe.

9. The energy storage system according to claim 8, wherein A cutout is provided in a sidewall of the pipe, and a part of the flame blocking portion is disposed in the cutout.

10. The energy storage system according to claim 1, wherein The energy storage system further includes a cover coupled to the pipe and covering the opening of the pipe.

11. The energy storage system according to claim 10, wherein Gas inside the container is discharged through a gap between the cover and the pipe.

12. The energy storage system according to claim 1, wherein, The energy storage system further includes a pressure reducing member in the opening of the pipe, the pressure reducing member being configured to prevent the internal pressure of the container from increasing to a set pressure or greater.

13. The energy storage system according to claim 12, wherein The pressure reducing member has a louver structure.

14. The energy storage system according to claim 12, characterized in that, The pressure reducing member includes: a first pressure reducing member configured to direct a direction of an air flow moving through the pipe to a first direction; and a second pressure reducing member stacked on the first pressure reducing member, the second pressure reducing member being configured to direct a direction of the air flow passing through the first pressure reducing member to a second direction different from the first direction.

15. The energy storage system according to claim 1, characterized in that, The energy storage system further includes a flame direction changing member between the battery rack and the pipe, the flame direction changing member being configured to change a direction of the flame.

16. The energy storage system according to claim 15, wherein, The flame direction changing member includes: a flame blocking plate between the battery rack and the pipe and spaced apart from the pipe; a protrusion at an edge of the flame blocking plate and protruding toward the pipe; and a guiding path between the flame blocking plate, the protrusion and the pipe and configured to guide movement of the flame.

Images