Energy storage system

Abstract

An energy storage system includes: a container; a rack frame inside the container; the battery module is configured to be stored in the rack frame; a cooling line connected to the battery module and configured to allow a coolant to circulate through the battery module; and a blocking portion configured to block leakage of the coolant to the outside of the container. According to the present disclosure, damage to an electrical system due to leakage of a coolant and casualties due to a fire may be prevented or significantly reduced by allowing the blocking portion to block a path of leakage of the coolant leaked from the battery module or the cooling line to the outside of the container.

Description

TECHNICAL FIELD

[0001] An aspect of embodiments of the disclosure relates to an energy storage system. BACKGROUND

[0002] Generally, an energy storage system (ESS) is a device capable of storing surplus power or storing power generated using renewable energy. The ESS can be configured by installing a plurality of battery modules in a rack and accommodating a plurality of racks in a container. The battery module can be constructed by assembling a plurality of secondary batteries electrically connected to each other in various suitable structures.

[0003] A method of cooling an energy storage system includes an air cooling method and a water cooling method. Unlike the air cooling method having a large temperature variation between battery cells and generating a local high-temperature section, the water cooling method has an advantage capable of achieving target temperature management and efficient cooling control. However, since a coolant flow path in the ESS is positioned close to a control module, a connector, a power cable, a communication cable, etc., there is a risk of damaging the entire battery system when the coolant leaks. Further, when the coolant circulating in the ESS leaks to the outside, there is a risk of injury or death due to a fire, etc.

[0004] The above information disclosed in the Background of the Related Art section is only for the purpose of providing an understanding of the background of the present disclosure and, therefore, can include information that does not constitute the related art. SUMMARY

[0005] Some embodiments of the disclosure aim to provide an energy storage system capable of reducing a risk due to leakage of a coolant.

[0006] These and other aspects and features of the present disclosure will be described in or be apparent from the following description of some embodiments of the present disclosure.

[0007] According to some embodiments of the disclosure, an energy storage system is provided, including: a container; a rack frame inside the container; a battery module configured to be stored in the rack frame; a cooling line connected to the battery module and configured to allow a coolant to circulate through the battery module; and a blocking portion configured to block the coolant from leaking to the outside of the container.

[0008] In some embodiments, the blocking portion includes: a blocking member in the container and spaced apart from the rack frame; and an accommodation portion in the blocking member and configured to accommodate the coolant leaked from the battery module or the cooling line.

[0009] In some embodiments, the blocking member includes a plurality of barriers fixed to the container and surrounding the rack frame.

[0010] In some embodiments, the barriers extend upward from a bottom surface of the container.

[0011] In some embodiments, the barriers have a distance from the rack frame that increases toward an end portion of the barriers.

[0012] In some embodiments, a volume of the accommodation portion is greater than a volume of the coolant circulated through the battery module.

[0013] In some embodiments, the energy storage system further includes a drain hole configured to pass through a bottom surface of the container and communicate with the accommodation portion, and an opening and closing member configured to open or close the drain hole.

[0014] In some embodiments, the drain hole is between the rack frame and the blocking member.

[0015] In some embodiments, the opening and closing member includes a drain cover detachably coupled to the drain hole.

[0016] In some embodiments, the drain cover is elastically deformable and configured to be inserted into the drain hole.

[0017] In some embodiments, the opening and closing member includes an opening and closing valve connected to the drain hole and configured to generate a driving force to open or close the drain hole, a detection member configured to detect a liquid level of the coolant accommodated in the accommodation portion, and an opening and closing control unit configured to control an operation of the opening and closing valve based on data detected by the detection member.

[0018] In some embodiments, the energy storage system further includes a control module connected to the battery module and configured to control an operation of the battery module, wherein the cooling line faces a first surface of the battery module, and the control module faces a second surface of the battery module positioned opposite the first surface.

[0019] In some embodiments, the cooling line includes a supply tube outside the rack frame, a discharge tube spaced apart from the supply tube and configured to discharge the coolant, a first branch tube extending from the supply tube and configured to deliver the coolant supplied from the supply tube to the battery module, and a second branch tube extending from the discharge tube and configured to deliver the coolant discharged from the battery module to the discharge tube.

[0020] In some embodiments, the supply pipe and the discharge pipe are parallel to a first direction, the first direction is parallel to the first surface of the battery module, and the first branch pipe and the second branch pipe are parallel to the first surface and parallel to a second direction that intersects the first direction.

[0021] In some embodiments, the battery module includes a first battery module and a second battery module, the first battery module and the second battery module are positioned alternately in the second direction, and the supply pipe is between the first battery module and the second battery module, and opposite sides of the first branch pipe are connected to the first battery module and the second battery module, respectively.

[0022] In some embodiments, the discharge pipe includes a first discharge pipe spaced apart from the supply pipe with the first battery module interposed between the first discharge pipe and the supply pipe, and a second discharge pipe spaced apart from the supply pipe with the second battery module interposed between the second discharge pipe and the supply pipe, wherein the second branch pipe includes a first discharge branch pipe extending from the first discharge pipe and connected to the first battery module, and a second discharge branch pipe extending from the second discharge pipe and connected to the second battery module.

[0023] In some embodiments, the energy storage system further includes a fire extinguishing line through which a fire extinguishing liquid is sprayed onto the battery module, wherein the fire extinguishing line faces the first surface.

[0024] In some embodiments, the fire extinguishing line includes a fire extinguishing supply pipe spaced apart from the supply pipe and the discharge pipe of the cooling line and parallel to the first direction, and a spray pipe extending from the fire extinguishing supply pipe toward an interior of the rack frame. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings illustrate some embodiments of the present disclosure and together with the detailed description further describe the aspects and features of the present disclosure. However, the present disclosure should not be construed as being limited to the accompanying drawings.

[0026] The above and other objects, features and advantages of the present disclosure will become more apparent to one of ordinary skill in the art by describing in detail exemplary embodiments thereof with reference to the attached drawings that illustrate preferred embodiments of the present disclosure. In the drawings:

[0027] Figure 1 A perspective view to schematically illustrate a configuration of an energy storage system according to some embodiments of the present disclosure;

[0028] Figure 2 A perspective view to schematically illustrate a configuration of an energy storage system according to some embodiments of the present disclosure; Figure 1Different perspective views illustrate perspective views of the configuration of an energy storage system according to some embodiments of the present disclosure;

[0029] Figure 3 is a front view schematically illustrating the configuration of an energy storage system according to some embodiments of the present disclosure;

[0030] Figure 4 A rear view schematically illustrating the configuration of an energy storage system according to some embodiments of the present disclosure;

[0031] Figure 5 is an enlarged view schematically illustrating the configuration of a cooling line according to some embodiments of the present disclosure;

[0032] Figure 6 is a perspective view schematically illustrating the configuration of a blocking portion according to some embodiments of the present disclosure;

[0033] Figure 7 is an enlarged view schematically illustrating the configuration of a blocking portion according to some embodiments of the present disclosure;

[0034] Figure 8 is an enlarged view schematically illustrating the configuration of a fire extinguishing line according to some embodiments of the present disclosure;

[0035] Figures 9 to 11 A diagram schematically illustrating an operation process of an energy storage system according to some embodiments of the present disclosure;

[0036] Figure 12 is a perspective view schematically illustrating the configuration of an energy storage system according to some other embodiments of the present disclosure;

[0037] Figure 13 For the Figure 12 Different perspective views illustrate perspective views of the configuration of an energy storage system according to some other embodiments of the present disclosure;

[0038] Figure 14 is an enlarged view schematically illustrating the configuration of a blocking portion according to some other embodiments of the present disclosure;

[0039] Figure 15 is a cross-sectional view schematically illustrating the configuration of a blocking portion according to some other embodiments of the present disclosure;

[0040] Figure 16 is a perspective view schematically illustrating the configuration of an energy storage system according to yet another embodiment of the present disclosure;

[0041] Figure 17 For the Figure 16 Perspective views illustrating configurations of energy storage systems according to still other embodiments of the present disclosure from different perspectives;

[0042] Figure 18 a block diagram schematically illustrating a configuration of an opening and closing member according to still another embodiment of the present disclosure;

[0043] Figure 19 a cross-sectional view schematically illustrating a configuration of an opening and closing member according to still another embodiment of the present disclosure; and

[0044] Figure 20 and Figure 21 a view schematically illustrating an operation process of an energy storage system according to still another embodiment of the present disclosure. DETAILED DESCRIPTION

[0045] In this document, some embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. The terms or words used in the present specification and claims should not be interpreted as being limited to the commonly used meanings or dictionary definitions and should be interpreted in a manner that is most consistent with the concept of the present disclosure based on the principle that an inventor can properly define the terms to best explain the idea of the technical disclosure.

[0046] The embodiments described in the present specification and the configurations shown in the accompanying drawings are provided as some example embodiments of the present disclosure, and do not represent all technical ideas, aspects, and features of the present disclosure. Accordingly, it should be understood that, at the time of filing the present application, there can be various equivalents and modifications which can substitute or modify the embodiments described herein.

[0047] 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, connected or coupled to the other element or layer, or one or more intervening elements or layers can 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, there are no intervening elements or layers present. For example, when a first element is described as being "coupled" or "connected" to a 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.

[0048] In the drawings, for clarity of illustration, the sizes of various elements, layers, etc. may be exaggerated. The same reference numerals refer to the same or similar elements. As used herein, the term "and / or" includes any one and all combinations of one or more associated listed items. In addition, the use of "may" when describing the 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..." modify the entire element list when following the element list, rather than modifying the individual elements in the list. When phrases 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 of A, B, and C," or "at least one selected from the middle of A, B, and C" are used to indicate a list of elements A, B, and C, the phrase may refer to any one of A, B, and C and all suitable combinations or subsets, such as A, B, C, A and B, A and C, B and C, or A and B and C. As used herein, the term "use" may be considered synonymous with the term "utilize." As used herein, the terms "substantially," "approximately," and similar terms are used as terms of approximation rather than terms of degree, and are intended to take into account the inherent variation in measurements or calculations that one of ordinary skill in the art would recognize.

[0049] 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 could be termed a second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0050] For ease of description, spatial relative terms (such as "below", "below", "down", "above", "on", etc.) can be used in this article to describe the relationship between an element or feature as shown in the figure and another element or feature. It should be understood that spatial relative terms are intended to cover different orientations of the device in use or operation except the orientation depicted in the figure. For example, if the device in the figure is turned over, the element described as being "below" or "below" other elements or features will then be oriented as being "above" or "above" other elements or features. Therefore, the term "below" can cover both above and below orientations. The device can be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relative descriptors used herein should be interpreted accordingly.

[0051] The terminology used herein is for the purpose of describing embodiments of the present disclosure and is not intended to be limiting of the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0052] Further, any numerical ranges herein are intended to include all sub-ranges of the same numerical precision, i.e. 1.0 to 10.0 is intended to include 2.4 to 7.6, etc. Any maximum numerical limitation

[0053] Referring to two compared elements, features, etc. as "the same" can mean that they are "substantially the same." Thus, the phrase "substantially the same" can include cases where there is a deviation considered to be low in the art (e.g., 5% or less). Additionally, when a parameter is said to be uniform in a given region, it can mean that it is uniform in terms of average value.

[0054] Throughout the specification, unless otherwise indicated, each element can be singular or plural.

[0055] When any element is referred to as being "on" or "above" or "below" a component, it can mean that the element is placed in contact with the upper surface (or lower surface) of the component, or it can mean that another component can be interposed between the component and any element arranged (or located or positioned) on (or below) the component.

[0056] Additionally, it is to be understood that when a member is referred to as being "coupled" or "linked" to another member, it can be directly coupled or linked to the other member or intervening members can be present. In addition, when a member is referred to as being "electrically coupled" to another member, it can be directly electrically connected to the other member or intervening members can be present such that the member and the other member are indirectly electrically connected to each other.

[0057] Throughout the specification, unless otherwise indicated, when stating "A and / or B", it means A, B, or A and B. That is, "and / or" includes any one or all combinations of the listed items. When stating "C~D", it means C or above and D or below, unless otherwise stated.

[0058] The terms used in the present specification are used to describe embodiments of the present disclosure, and are not intended to limit the present disclosure.

[0059] In view of the overall disclosure, those of ordinary skill in the art will recognize that various suitable features of various embodiments of the present disclosure can be combined, in part or whole, with each other, and can be technically interconnected and operated in various suitable ways, and each embodiment can be implemented independently of or in combination with each other in any suitable manner, unless otherwise stated or implied.

[0060] In the present disclosure, processes, elements and techniques that are considered unnecessary for those having ordinary skill in the art to fully understand aspects and features of the present disclosure can not be described or can only be described simply. In the drawings, the relative sizes of elements, layers, and regions can be exaggerated for the sake of clarity.

[0061] Figure 1 a perspective view to schematically illustrate a configuration of an energy storage system according to some embodiments of the present disclosure; Figure 2 a perspective view to illustrate a configuration of an energy storage system according to some embodiments of the present disclosure from a different viewing angle; Figure 1 a perspective view to illustrate a configuration of an energy storage system according to some embodiments of the present disclosure from a different viewing angle;

[0062] Figure 3 a front view to schematically illustrate a configuration of an energy storage system according to some embodiments of the present disclosure; and Figure 4 a rear view to schematically illustrate a configuration of an energy storage system according to some embodiments of the present disclosure.

[0063] Referring to Figures 1 to 4 , an energy storage system according to some embodiments includes a container 100, a rack frame 200, a battery module 300, a cooling line 400, and a blocking portion 500.

[0064] Examples of the first direction, the second direction, and the third direction to be described below can include directions parallel to the Z-axis, the X-axis, and the Y-axis. However, the first direction, the second direction, and the third direction are not limited thereto, and the design of the first direction, the second direction, and the third direction can be variously changed in a suitable manner to be arranged as three different directions crossing each other in three dimensions. Figure 1 And Figure 2 The directions parallel to the Z-axis, the X-axis, and the Y-axis. However, the first direction, the second direction, and the third direction are not limited thereto, and the design of the first direction, the second direction, and the third direction can be variously changed in a suitable manner to be arranged as three different directions crossing each other in three dimensions.

[0065] The container 100 forms an illustrative appearance of an energy storage system. Examples of the container 100 can include various suitable types of closed structures having a hollow interior (e.g., an empty interior), such as a separate building, a room within a building, or a container, etc. In addition to the Figure 1 In addition to the cuboid shape illustrated in the example, the design of the shape of the container 100 can be changed to various suitable shapes, such as a polyhedral shape or a cylindrical shape, etc.

[0066] The rack frame 200 is disposed inside the container 100 and supports the battery module 300, which will be described below. The volume of the rack frame 200 can be smaller than the internal volume of the container 100. The lower end portion of the rack frame 200 can be supported by being in contact with the bottom surface of the container 100. The rack frame 200 can be made of a material having high rigidity, such as steel, etc., to prevent or significantly reduce damage due to a load applied from the battery module 300. In addition to the Figure 1 In addition to the cuboid shape illustrated in the example, the design of the shape of the rack frame 200 can be changed to various suitable shapes, such as a polyhedral shape or a cylindrical shape, etc.

[0067] A plurality of accommodation spaces 201 can be formed inside the rack frame 200. The longitudinal direction of the accommodation space 201 can extend in a direction parallel to the third direction. Both end portions of the accommodation space 201 can pass through the rack frame 200 and communicate with the outside space of the rack frame 200.

[0068] The plurality of accommodation spaces 201 can be disposed to be spaced apart from each other inside the rack frame 200. For example, the plurality of accommodation spaces 201 can be arranged in a plurality of columns in the first direction and the second direction. Figure 1 And Figure 2 The plurality of accommodation spaces 201 are arranged in ten rows in the first direction and arranged in four rows in the second direction in the illustrated example, but the number of rows of the plurality of accommodation spaces 201 is not limited thereto, and the design of the number of the plurality of accommodation spaces 201 can be variously changed in a suitable manner.

[0069] The battery module 300 is stored in the rack frame 200 and stores electric power by a charging operation or supplies stored electric power to an external electronic device by a discharging operation.

[0070] The battery module 300 according to some embodiments can include a first battery module 310 and a second battery module 320.

[0071] Each of the first battery module 310 and the second battery module 320 can include a module case having a substantially box-like shape, a plurality of battery cells disposed inside the module case, and a cooling plate on which a coolant flows and cools the battery cells. The battery cells can be pouch-type secondary batteries, prismatic secondary batteries, cylindrical secondary batteries, or the like.

[0072] The first battery module 310 and the second battery module 320 can each be provided as a plurality of battery modules. The plurality of first battery modules 310 and the plurality of second battery modules 320 can be respectively accommodated in a plurality of accommodation spaces 201 formed in the rack frame 200.

[0073] The plurality of first battery modules 310 and the plurality of second battery modules 320 can be arranged in a plurality of columns in the second direction inside the rack frame 200. The plurality of first battery modules 310 and the plurality of second battery modules 320 can be alternately disposed (or positioned) in the second direction. That is, the second battery modules 320 can be disposed between any pair of first battery modules 310 adjacent to each other in the second direction, and the first battery modules 310 can be disposed between any pair of second battery modules 320 adjacent to each other in the second direction.

[0074] The plurality of first battery modules 310 and the plurality of second battery modules 320 can be arranged in a plurality of columns in the first direction inside the rack frame 200. In this case, only the first battery modules 310 or the second battery modules 320 can be arranged in a row parallel to the first direction. That is, the first battery modules 310 can be continuously disposed in the first direction (for example, the first battery modules 310 are arranged one after another without any intervening second battery modules 320), and can be alternately disposed with the second battery modules 320 in the second direction.

[0075] The first battery module 310 can include a first surface 311 and a second surface 312 positioned opposite the first surface 311. The first surface 311 and the second surface 312 of the first battery module 310 can be spaced apart from each other in the third direction and disposed parallel to each other. The first surface 311 and the second surface 312 of the first battery module 310 can be exposed to an outside space of the rack frame 200 through both ends in the longitudinal direction of the accommodation space 201.

[0076] The second battery module 320 can include a first surface 321 and a second surface 322 positioned opposite the first surface 321. The first surface 321 and the second surface 322 of the second battery module 320 can be spaced apart from each other in the third direction and disposed parallel to each other. The first surface 321 and the second surface 322 of the second battery module 320 can be exposed to the outside space of the rack frame 200 through both ends in the longitudinal direction of the accommodation space 201.

[0077] The first surface 321 of the second battery module 320 can be positioned coplanar with the first surface 311 of the first battery module 310. The second surface 322 of the second battery module 320 can be positioned coplanar with the second surface 312 of the first battery module 310. For example, the first surface 311 of the first battery module 310 and the first surface 321 of the second battery module 320 and the second surface 312 of the first battery module 310 and the second surface 322 of the second battery module 320 can be located on different planes parallel to the first direction and the second direction.

[0078] The first surface of the battery module 300 described below can be a concept including the first surface 311 of the first battery module 310 and the first surface 321 of the second battery module 320, and the second surface of the battery module 300 can be a concept including the second surface 312 of the first battery module 310 and the second surface 322 of the second battery module 320.

[0079] The cooling line 400 is connected to the battery module 300 and allows the coolant to circulate through the battery module 300. That is, the cooling line 400 can function as a component that cools the battery module 300 by heat exchange with the battery module 300 and the coolant. The cooling line 400 can be disposed to face the first surface of the battery module 300, i.e., the first surface 311 of the first battery module 310 and the first surface 321 of the second battery module 320.

[0080] Figure 5 An enlarged view illustrating a configuration of a cooling line according to some embodiments of the disclosure is shown for illustrative purposes.

[0081] The cooling line 400 according to some embodiments can include a supply pipe 410, a discharge pipe 420, a first branch pipe 430, and a second branch pipe 440.

[0082] The supply pipe 410 is disposed outside the rack frame 200 and supplies the coolant to the first branch pipe 430, which will be described below. The supply pipe 410 according to some embodiments can be formed in the shape of a pipe having a hollow interior (e.g., an empty interior). One end portion of the supply pipe 410 can be connected to a cooler and receive the coolant whose temperature is sufficiently reduced by the cooler. The longitudinal direction of the supply pipe 410 can be parallel to the first direction. The supply pipe 410 can be fixed to the rack frame 200 and to a separate support unit disposed outside the rack frame 200.

[0083] The supply pipe 410 can be provided as a plurality of supply pipes 410. The plurality of supply pipes 410 can be disposed to be spaced apart from each other in the second direction. Each of the supply pipes 410 can be disposed between the first battery module 310 and the second battery module 320 adjacent to each other in the second direction. For example, the first battery module 310, the supply pipe 410, and the second battery module 320 can constitute one group, and the first battery module 310, the supply pipe 410, and the second battery module 320 constituting one group can be arranged in order in the second direction as exemplified in Figure 3 and Figure 5 When the supply pipe 410 is disposed outside the rack frame 200, the supply pipe 410 can be spaced apart from the region positioned between the first battery module 310 and the second battery module 320 adjacent to each other in the third direction by a distance (e.g., a set distance or a predetermined distance).

[0084] The discharge pipe 420 is disposed outside the rack frame 200 to be spaced apart from the supply pipe 410 and discharges the coolant delivered from the second branch pipe 440 to the outside. The discharge pipe 420 according to some embodiments can be formed in the shape of a pipe having a hollow interior (e.g., an empty interior). One end portion of the discharge pipe 420 can be connected to a cooler, pass through the battery module 300, and deliver the coolant having an increased temperature to the cooler. The longitudinal direction of the discharge pipe 420 can be parallel to the first direction. The discharge pipe 420 can be fixed to the rack frame 200 and to a separate support unit disposed outside the rack frame 200.

[0085] The discharge pipe 420 can include a first discharge pipe 421 and a second discharge pipe 422.

[0086] The first discharge pipe 421 and the second discharge pipe 422 can be formed in a shape of a pipe having a hollow interior (e.g., an empty interior). One of the end portions of the first discharge pipe 421 and the second discharge pipe 422 can be connected to the cooler, pass through the battery module 300, and deliver the coolant having an increased temperature to the cooler. The longitudinal direction of the first discharge pipe 421 and the second discharge pipe 422 can be parallel to the first direction. The first discharge pipe 421 and the second discharge pipe 422 can be fixed to the rack frame 200 and to a separate support unit provided at the outer side of the rack frame 200.

[0087] The first discharge pipe 421 and the second discharge pipe 422 can be provided on opposite sides of the supply pipe 410, respectively. For example, the first discharge pipe 421 can be provided to be spaced apart from the supply pipe 410 in a direction parallel to the second direction with the first battery module 310 interposed therebetween. Further, the second discharge pipe 422 can be provided to be spaced apart from the supply pipe 410 in a direction parallel to the second direction with the second battery module 320 interposed therebetween. The first discharge pipe 421 and the second discharge pipe 422 can each be provided as a plurality of discharge pipes. The plurality of first discharge pipes 421 and the plurality of second discharge pipes 422 can be provided on opposite sides of each of the supply pipes 410, respectively.

[0088] The first branch pipe 430 extends from the supply pipe 410 and delivers the coolant supplied from the supply pipe 410 to the battery module 300. The first branch pipe 430 according to some embodiments can be formed in a shape of a pipe having a hollow interior (e.g., an empty interior). The longitudinal direction of the first branch pipe 430 can be parallel to the second direction. The central portion of the first branch pipe 430 can be connected to the supply pipe 410, and both sides of the first branch pipe 430 can extend opposite to each other with respect to the supply pipe 410. The opposite sides of the first branch pipe 430 can be connected to the first battery module 310 and the second battery module 320, respectively. Accordingly, the coolant delivered to the first branch pipe 430 through the supply pipe 410 can be supplied to the first battery module 310 through one side of the first branch pipe 430 and to the second battery module 320 through the other side of the first branch pipe 430.

[0089] The first branch pipe 430 can be provided as a plurality of first branch pipes 430. The plurality of first branch pipes 430 connected to any one of the supply pipes 410 can be arranged in a plurality of columns in the first direction. The number of the first branch pipes 430 connected to any one of the supply pipes 410 can be identical to the number of the first battery modules 310 or the second battery modules 320 provided in the first direction.

[0090] The second branch pipe 440 extends from the discharge pipe 420 and delivers the coolant discharged from the battery module 300 to the discharge pipe 420.

[0091] The second branch pipe 440 can include a first discharge branch pipe 441 and a second discharge branch pipe 442.

[0092] The first discharge branch pipe 441 extends from the first discharge pipe 421 and is connected to the first battery module 310. The first discharge branch pipe 441 according to some embodiments can be formed in a shape of a pipe having a hollow interior (e.g., an empty interior). A longitudinal direction of the first discharge branch pipe 441 can be parallel to the second direction. Opposite sides of the first discharge branch pipe 441 can be connected to the first discharge pipe 421 and the first battery module 310, respectively. Accordingly, coolant supplied to the first battery module 310 through one side of the first branch pipe 430 can circulate inside the first battery module 310 and then can be delivered to the first discharge pipe 421 through the first discharge branch pipe 441.

[0093] The first discharge branch pipe 441 can be provided as a plurality of first discharge branch pipes 441. The plurality of first discharge branch pipes 441 can be arranged in multiple columns in a longitudinal direction of the first discharge pipe 421 (i.e., in the first direction). The number of the first discharge branch pipes 441 connected to any one of the first discharge pipes 421 can be identical to the number of the first battery modules 310 or the second battery modules 320 arranged in the first direction.

[0094] The second discharge branch pipe 442 extends from the second discharge pipe 422 and is connected to the second battery module 320. The second discharge branch pipe 442 according to some embodiments can be formed in a shape of a pipe having a hollow interior (e.g., an empty interior). A longitudinal direction of the second discharge branch pipe 442 can be parallel to the second direction. Opposite sides of the second discharge branch pipe 442 can be connected to the second discharge pipe 422 and the second battery module 320, respectively. Accordingly, coolant supplied to the second battery module 320 through the other side of the first branch pipe 430 can circulate inside the second battery module 320 and then can be delivered to the second discharge pipe 422 through the second discharge branch pipe 442.

[0095] The second discharge branch pipe 442 can be provided as a plurality of second discharge branch pipes 442. The plurality of second discharge branch pipes 442 can be arranged in multiple columns in a longitudinal direction of the second discharge pipe 422 (i.e., in the first direction). The number of the second discharge branch pipes 442 connected to any one of the second discharge pipes 422 can be identical to the number of the first battery modules 310 or the second battery modules 320 arranged in the first direction.

[0096] The blocking portion 500 blocks coolant leaked from the battery module 300 or the cooling line 400 from leaking to the outside of the container 100. That is, the blocking portion 500 can function as a member that blocks a path through which coolant leaked from the battery module 300 or the cooling line 400 leaks to the outside of the container 100 due to external impact or pipe damage, etc. Accordingly, the blocking portion 500 can prevent or significantly reduce damage to an electrical system due to coolant leakage and casualties due to fire.

[0097] Figure 6 FIG. 4 is a perspective view schematically illustrating a configuration of a blocking portion according to some embodiments of the disclosure, and Figure 7 FIG. 5 is an enlarged view schematically illustrating a configuration of a blocking portion according to some embodiments of the disclosure.

[0098] Referring to Figure 6 and Figure 7 The blocking portion 500 according to some embodiments can include a blocking member 510 and an accommodation portion 520.

[0099] The blocking member 510 is disposed inside the container 100 and is disposed to be spaced apart from the rack frame 200.

[0100] The blocking member 510 according to some embodiments can include a plurality of barriers 511.

[0101] The plurality of barriers 511 can be fixed to the container 100 and disposed to surround the rack frame 200. The barrier 511 according to some embodiments can be formed in a shape having a partition, a lower end portion of which is fixed to a bottom surface of the container 100 and an upper end portion of which extends vertically upward from the container 100. The lower end portion of the barrier 511 can be integrally fixed to the bottom surface of the container 100 by welding or the like, or can be detachably assembled to the bottom surface of the container 100 by fitting or the like.

[0102] An inner surface of the barrier 511 can be disposed to be spaced apart from an outer peripheral surface of the rack frame 200 by a distance (e.g., a set distance or a predetermined distance) to face the outer peripheral surface of the rack frame 200. Two end portions of the plurality of barriers 511 can be connected to each other and can be disposed on the bottom surface of the container 100 to form a closed shape. The inner surfaces of the plurality of barriers 511 can be disposed to face different outer peripheral surfaces of the rack frame 200.

[0103] The accommodation portion 520 is disposed inside the blocking member 510 and accommodates coolant leaked from the battery module 300 or the cooling line 400. That is, the accommodation portion 520 can function as a member that accommodates coolant dropped from the battery module 300 or the cooling line 400 to the bottom surface of the container 100.

[0104] An example of the accommodation portion 520 according to some embodiments can include a hollow space surrounded by the inner surfaces of the plurality of barriers 511 and the bottom surface of the container 100. Because the inner surfaces of the barriers 511 are spaced apart from the outer peripheral surface of the rack frame 200 by a distance (e.g., a set distance or a predetermined distance), the area of the accommodation portion 520 parallel to the XY plane can be greater than the area of the rack frame 200 parallel to the XY plane. The accommodation portion 520 can be disposed to face the cooling line 400 in the first direction. Accordingly, the accommodation portion 520 can accommodate the coolant leaked from the cooling line 400 as well as the battery modules 300.

[0105] The volume of the accommodation portion 520 can be greater than the volume of the coolant circulating through the plurality of battery modules 300. For example, when the volume of the coolant circulating through the plurality of battery modules 300 is about 11 L, the volume of the accommodation portion 520 can be about 18 L. Accordingly, even when the coolant circulating through the plurality of battery modules 300 is entirely leaked, the accommodation portion 520 can prevent or significantly reduce the leakage of the coolant beyond the barriers 511 to the outside of the container 100.

[0106] In some examples, the volume of the accommodation portion 520 can be greater than the sum of the volumes of the coolants circulating through the plurality of battery modules 300 and the cooling line 400. Accordingly, even when the coolants circulating through the plurality of battery modules 300 and the cooling line 400 are entirely leaked, the accommodation portion 520 can prevent or significantly reduce the leakage of the coolants beyond the barriers 511 to the outside of the container 100.

[0107] The energy storage system according to some embodiments can further include a relief hole 600 and an opening and closing member 700.

[0108] The relief hole 600 functions as a component that provides a discharge path for the coolant accommodated in the accommodation portion 520. The relief hole 600 according to some embodiments can be formed in a shape having a hole vertically passing through the bottom surface of the container 100 in the first direction. The upper end portion of the relief hole 600 can be opened and communicate with the accommodation portion 520. The lower end portion of the relief hole 600 can be connected to a coolant storage tank or the like separately installed outside through a pipe, a hose, or the like.

[0109] The relief hole 600 can be disposed between the rack frame 200 and the blocking member 510. For example, as exemplified in FIGS. 11 and 12, the relief hole 600 can be disposed at the corner of the accommodation portion 520. Accordingly, the relief hole 600 can prevent or significantly reduce interference with the rack frame 200 and can further improve (e.g., increase) the accessibility of the user. Figure 6 and Figure 7 Accordingly, the relief hole 600 can prevent or significantly reduce interference with the rack frame 200 and can further improve (e.g., increase) the accessibility of the user.

[0110] The drain hole 600 can be provided as a plurality of drain holes 600. The plurality of drain holes 600 can be disposed to be spaced apart from each other on the bottom surface of the container 100. The design of the positions of the plurality of drain holes 600 can be variously changed in a suitable manner within the range of positions capable of communicating with the accommodation portion 520.

[0111] The opening and closing member 700 opens or closes the drain hole 600 and selectively restricts the flow of the coolant through the drain hole 600.

[0112] The opening and closing member 700 according to some embodiments can include a drain cover 710.

[0113] The drain cover 710 is detachably connected to the drain hole 600 and restricts or allows the flow of the coolant through the drain hole 600 depending on whether the drain cover 710 is connected to the drain hole 600.

[0114] The drain cover 710 according to some embodiments can be formed in the shape of a plug capable of being inserted into the drain hole 600. When the drain cover 710 is inserted into the drain hole 600, the drain cover 710 can block the communication between the drain hole 600 and the accommodation portion 520 and restrict the flow of the coolant through the drain hole 600. When the drain cover 710 is detached from the drain hole 600, the drain cover 710 can allow the drain hole 600 to communicate with the accommodation portion 520 and can allow the flow of the coolant through the drain hole 600. The drain cover 710 can be made of a material that can be elastically deformed, such as rubber, silicone, or the like. Accordingly, when the drain cover 710 is inserted into the drain hole 600, the drain cover 710 can be in close contact with the inner wall of the drain hole 600 due to its own elastic restoring force.

[0115] The energy storage system according to some embodiments can further include a control module 800.

[0116] The control module 800 is connected to the battery module 300 and controls the operation of the battery module 300. The control module 800 can be disposed to face the second surface of the battery module 300. For example, the control module 800 can be provided as a plurality of control modules 800, and the plurality of control modules 800 can be connected to the second surface 312 of the first battery module 310 and the second surface 322 of the second battery module 320, respectively. Accordingly, since the control module 800 is spaced apart from the cooling line 400 with the battery module 300 interposed therebetween, the control module 800 can prevent or significantly reduce the possibility of electrical damage and fire caused by the coolant leaked from the cooling line 400.

[0117] The control module 800 according to some embodiments can include an electronic control device for a typical battery system, such as a battery management system (BMS), a battery monitoring unit (BMU), a battery disconnect unit (BDU), or a battery junction box (BJB), which is capable of monitoring the voltage, current, and / or temperature of the battery module 300 in real time and actively controlling the charging and discharging operations of the battery module 300 based on the monitored information. Such an electronic control device can be implemented in the form of an integrated circuit (IC), a microcontroller (μC), a microprocessor, an application-specific integrated circuit (ASIC), or the like. Further, the control module 800 can include a communication device capable of establishing a communication connection with an external server or another control module 800 and transmitting or receiving data through the established communication connection. The communication device can be implemented as a device performing a wireless communication connection through any one of a Bluetooth communication method, a Wi-Fi communication method, a Zigbee communication method, and a near field communication (NFC) method, or a device performing a wired communication via a cable or the like.

[0118] The energy storage system according to some embodiments can further include a fire extinguishing line 900.

[0119] The fire extinguishing line 900 functions as a component to extinguish a fire by spraying a fire extinguishing liquid on the battery module 300 when a fire occurs. The fire extinguishing line 900 can be disposed to face the first surface of the battery module 300.

[0120] Figure 8 An enlarged view to schematically illustrate a configuration of the fire extinguishing line according to some embodiments of the disclosure.

[0121] Referring to Figure 5 and Figure 8 The fire extinguishing line 900 according to some embodiments can include a fire extinguishing supply line 910 and a spray line 920.

[0122] The fire extinguishing supply line 910 can be formed in the shape of a tube having a hollow interior (e.g., an empty interior). One end portion of the fire extinguishing supply line 910 can be connected to a fire extinguishing liquid storage tank disposed outside the container 100, and the fire extinguishing supply line 910 can receive a fire extinguishing liquid through the fire extinguishing liquid storage tank when a fire occurs. The longitudinal direction of the fire extinguishing supply line 910 can be disposed parallel to the first direction, and the fire extinguishing supply line 910 can be disposed to cross the first branch line 430 and the second branch line 440. The fire extinguishing supply line 910 can be disposed to be spaced apart from the supply line 410 and the discharge line 420 (e.g., in the second direction).

[0123] The fire extinguishing supply pipe 910 can be provided as a plurality of fire extinguishing supply pipes 910. The plurality of fire extinguishing supply pipes 910 can be disposed to be spaced apart from each other in the second direction. The plurality of fire extinguishing supply pipes 910 can be disposed to face the first surfaces of the battery modules 300 in a direction parallel to the third direction. For example, the first surfaces 311 of each of the first battery modules 310 can be disposed to face one pair of the fire extinguishing supply pipes 910, and the first surfaces 321 of the second battery modules 320 can be disposed to face another pair of the fire extinguishing supply pipes 910. Due to such an arrangement, the fire extinguishing supply pipes 910 can smoothly deliver the fire extinguishing liquid to the spray pipes 920 (which will be described below) without interfering with the cooling line 400.

[0124] The spray pipes 920 extend from the fire extinguishing supply pipes 910 and spray the fire extinguishing liquid received from the fire extinguishing supply pipes 910 to the battery modules 300 when a fire occurs. The spray pipes 920 according to some embodiments can extend (e.g., in a direction parallel to the third direction) from the fire extinguishing supply pipes 910 toward the inside of the rack frame 200. The spray pipes 920 can be disposed to face the upper surfaces of the battery modules 300 inside the rack frame 200. For example, the spray pipes 920 can include spray holes through which the fire extinguishing liquid moving inside the spray pipes 920 is sprayed to the outside, and melting members disposed to surround the spray holes and melt to open the spray holes when the melting members are heated to above a set temperature.

[0125] The spray pipes 920 can be provided as a plurality of spray pipes 920. The plurality of spray pipes 920 can be installed for each of the fire extinguishing supply pipes 910. The plurality of spray pipes 920 connected to any one of the fire extinguishing supply pipes 910 can be disposed to be spaced apart from each other in the longitudinal direction of the fire extinguishing supply pipe 910, i.e., in the first direction. The number of the plurality of spray pipes 920 connected to each of the fire extinguishing supply pipes 910 can be identical to the number of the first battery modules 310 or the second battery modules 320 disposed in the first direction. The plurality of spray pipes 920 extending from the fire extinguishing supply pipe 910 disposed to face the first surfaces 311 of the first battery modules 310 can be respectively disposed to face the upper surfaces of each of the first battery modules 310 disposed in the first direction. Further, the plurality of spray pipes 920 extending from the fire extinguishing supply pipe 910 disposed to face the first surfaces 321 of the second battery modules 320 can be respectively disposed to face the upper surfaces of each of the second battery modules 320 disposed in the first direction.

[0126] Hereinafter, the operation of the energy storage system according to some embodiments of the disclosure will be described.

[0127] Figures 9 to 11 To illustrate a view of the operation process of the energy storage system according to some embodiments of the disclosure.

[0128] Reference Figure 9The coolant introduced into the supply pipe 410 through the cooler flows along the supply pipe 410 in a direction parallel to the first direction, and is delivered to the first branch pipe 430.

[0129] The coolant delivered to the first branch pipe 430 is delivered to each of the first battery module 310 and the second battery module 320 through opposite sides of the first branch pipe 430.

[0130] The coolants delivered to the first battery module 310 and the second battery module 320 are circulated through the first battery module 310 and the second battery module 320, respectively, and cool the first battery module 310 and the second battery module 320 through heat exchange with the first battery module 310 and the second battery module 320.

[0131] The coolant discharged from the first battery module 310 is delivered to the first discharge pipe 421 through the first discharge branch pipe 441, and is introduced again into the cooler.

[0132] In the same manner, the coolant discharged from the second battery module 320 is delivered to the second discharge pipe 422 through the second discharge branch pipe 442, and is introduced again into the cooler.

[0133] Referring to Figure 10 When the battery module 300 or the cooling line 400 is damaged during the above-described process of circulating the coolant, the coolant leaked from the battery module 300 or the cooling line 400 falls to the bottom surface of the container 100.

[0134] Because the blocking member 510 is disposed to completely surround the periphery of the rack frame 200, the coolant falling to the bottom surface of the container 100 is contained inside the containing portion 520.

[0135] The flow area of the coolant contained in the containing portion 520 can be limited to the area range of the containing portion 520 by the barrier 511, and can prevent or can significantly reduce the possibility of the coolant contained in the containing portion 520 from leaking to the outside of the container 100.

[0136] In this case, when the drain cover 710 is inserted into the drain hole 600, the coolant leaked from the battery module 300 or the cooling line 400 continuously accumulates inside the containing portion 520, and the liquid level of the coolant gradually rises.

[0137] Referring to Figure 11 When the liquid level of the coolant excessively rises and the coolant is to be discharged, the user can separate the drain cover 710 from the drain hole 600.

[0138] When the relief cover 710 is detached from the relief hole 600, the coolant accommodated in the accommodation portion 520 can be discharged to a coolant storage tank separately provided outside the container 100 through the relief hole 600, and the liquid level of the coolant in the accommodation portion 520 can be lowered.

[0139] Hereinafter, a storage energy system according to some other embodiments of the disclosure will be described.

[0140] Figure 12 A perspective view schematically illustrating a configuration of a storage energy system according to some other embodiments of the disclosure; Figure 13 A perspective view illustrating a configuration of a storage energy system according to some other embodiments of the disclosure from a different view angle; Figure 12 A perspective view illustrating a configuration of a storage energy system according to some other embodiments of the disclosure from a different view angle; Figure 14 An enlarged view schematically illustrating a configuration of a blocking portion according to some other embodiments of the disclosure; and Figure 15 A cross-sectional view schematically illustrating a configuration of a blocking portion according to some other embodiments of the disclosure.

[0141] Referring to Figures 12 to 15 , a storage energy system according to some embodiments can include a container 100, a rack frame 200, a battery module 300, a cooling line 400, a blocking portion 500, a relief hole 600, an opening and closing member 700, a control module 800, and a fire extinguishing line 900.

[0142] A storage energy system according to some other embodiments of the disclosure can be configured to be different from a storage energy system according to some embodiments of the disclosure only in a detailed configuration of the blocking portion 500.

[0143] Accordingly, in describing a storage energy system according to some other embodiments of the disclosure, only the detailed configuration of the blocking portion 500 which is not described in the description of the storage energy system according to some embodiments of the disclosure will be described.

[0144] The description of the storage energy system according to some embodiments of the disclosure can be directly applied to the remaining components of the storage energy system according to some other embodiments of the disclosure.

[0145] An inner surface of the barrier 511 which is in contact with the accommodation portion 520 according to some embodiments can be disposed to be inclined with respect to the rack frame 200. For example, the barrier 511 can be formed such that the distance from the rack frame 200 increases toward the upper end portion of the barrier 511. Accordingly, the blocking member 510 according to some embodiments of the disclosure can further expand the volume of the accommodation portion 520 while maintaining the same area on the bottom surface of the container 100 and the blocking member 510 according to some embodiments of the disclosure.

[0146] Hereinafter, a storage energy system according to still other embodiments of the disclosure will be described.

[0147] Figure 16 a perspective view to schematically illustrate a configuration of an energy storage system according to further embodiments of the disclosure; Figure 17 a perspective view to schematically illustrate a configuration of an energy storage system according to further embodiments of the disclosure from a different perspective; Figure 16 a perspective view to schematically illustrate a configuration of an energy storage system according to further embodiments of the disclosure from a different perspective; Figure 18 a block diagram to schematically illustrate a configuration of an opening and closing member according to further embodiments of the disclosure; and Figure 19 a cross-sectional view to schematically illustrate a configuration of an opening and closing member according to further embodiments of the disclosure.

[0148] Referring to Figures 16 to 19 , an energy storage system according to some embodiments can include a container 100, a rack frame 200, a battery module 300, a cooling line 400, a blocking portion 500, a relief hole 600, an opening and closing member 700, a control module 800, and a fire extinguishing line 900.

[0149] An energy storage system according to further embodiments of the disclosure can be configured to be different from an energy storage system according to Figures 1-15 only in a detailed configuration of the opening and closing member 700.

[0150] Accordingly, in describing an energy storage system according to further embodiments of the disclosure, only the detailed configuration of the opening and closing member 700 that is not described in the description of the energy storage system with reference to Figures 1-15 will be described.

[0151] The opening and closing member 700 according to some embodiments can include an opening and closing valve 720, a detection member 730, and an opening and closing control unit 740.

[0152] The opening and closing valve 720 is connected to the relief hole 600 and generates a driving force to open or close the relief hole 600. An example of the opening and closing valve 720 according to some embodiments can include various suitable types of electronic valves that are capable of being connected to the relief hole 600 and opening or closing the relief hole 600 by receiving power from the outside.

[0153] The detection member 730 detects a liquid level of the coolant contained in the containing portion 520. An example of the detection member 730 according to some embodiments can include a capacitive sensor that detects a capacitance that varies depending on the liquid level of the coolant within the containing portion 520. The detection member 730 can be disposed at various suitable positions at which the detection member 730 is capable of detecting the liquid level of the coolant contained in the containing portion 520, such as a wall surface of the container 100, the rack frame 200, and the like.

[0154] The opening / closing control unit 740 controls the operation of the opening / closing valve 720 based on data detected by the detection member 730. For example, when the level of the coolant detected by the detection member 730 is greater than or equal to a set height, the opening / closing control unit 740 can operate the opening / closing valve 720 so that the drain hole 600 is opened. Further, when the level of the coolant detected by the detection member 730 is less than the set height, the opening / closing control unit 740 can operate the opening / closing valve 720 so that the drain hole 600 is closed.

[0155] Hereinafter, the operation of the energy storage system according to still other embodiments of the present disclosure will be described.

[0156] Figure 20 and Figure 21 FIGS. 10 to 13 are views for schematically illustrating an operation process of the energy storage system according to still other embodiments of the present disclosure.

[0157] Referring to Figure 20 When the battery module 300 or the cooling line 400 is damaged during the process of circulating the coolant, the coolant leaked from the battery module 300 or the cooling line 400 falls to the bottom surface of the container 100.

[0158] When the blocking member 510 is disposed to completely surround the periphery of the rack frame 200, the coolant falling to the bottom surface of the container 100 is contained inside the containing portion 520.

[0159] The flow area of the coolant contained in the containing portion 520 can be limited to the area range of the containing portion 520 by the barrier 511, and can prevent or can significantly reduce the possibility of the coolant contained in the containing portion 520 from leaking to the outside of the container 100.

[0160] In this process, the detection member 730 detects the level of the coolant contained in the containing portion 520.

[0161] When the level of the coolant detected by the detection member 730 is lower than the set height h1, the opening / closing control unit 740 operates the opening / closing valve 720 so that the drain hole 600 is closed.

[0162] When the drain hole 600 is closed, the coolant leaked from the battery module 300 or the cooling line 400 continuously accumulates inside the containing portion 520, and the level of the coolant gradually rises.

[0163] Referring to Figure 21 When the height of the coolant contained in the containing portion 520 rises to the set height h1 or more due to the continuous accumulation of the coolant, the opening / closing valve 720 is operated so that the drain hole 600 is opened.

[0164] When the drain hole 600 is opened, the coolant contained in the containing portion 520 can be discharged to a coolant storage tank separately provided outside the container 100 through the drain hole 600, and the liquid level of the coolant in the containing portion 520 can be lowered.

[0165] According to the present disclosure, by allowing the blocking portion to block a path through which the leaked coolant from the battery module or the cooling line leaks to the outside of the container, damage to the electrical system due to the leakage of the coolant and casualties due to a fire can be prevented or significantly reduced.

[0166] According to the present disclosure, the control module and the cooling line can be spaced apart from each other with the battery module interposed therebetween, and thus damage to the control module from the leaked coolant of the cooling line can be prevented or significantly reduced.

[0167] According to the present disclosure, the containing portion can be formed to have a larger volume than the volume of the coolant circulating through the plurality of battery modules, and thus even when the coolant circulating through the plurality of battery modules is all leaked, the possibility of the coolant leaking to the outside of the container can be prevented or significantly reduced.

[0168] According to the present disclosure, using the drain hole and the opening and closing member, the liquid level of the coolant contained in the containing portion can be prevented from excessively rising.

[0169] However, the effects obtainable by 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 above description of the present disclosure.

[0170] Although the present disclosure has been described with reference to the embodiments illustrated in the drawings, these embodiments are merely illustrative, and it should be understood by those skilled in the art that various suitable modifications and other embodiments can be derived from the embodiments.

Claims

1. An energy storage system, characterized in that: The energy storage system comprises: container; a rack frame, inside the container; a battery module configured to be stored in the rack frame; a cooling line connected to the battery module and configured to allow a coolant to circulate through the battery module; and The blocking portion is configured to block the coolant from leaking to the outside of the container.

2. The energy storage system according to claim 1, characterized in that The blocking portion comprises: a blocking member in the receptacle and spaced from the housing frame; and A receiving portion is in the blocking member and is configured to receive the coolant leaked from the battery module or the cooling line.

3. The energy storage system according to claim 2, characterized in that: The blocking member includes a plurality of barriers fixed to the container and surrounding the chassis frame.

4. The energy storage system according to claim 3, characterized in that The barrier extends upward from a bottom surface of the container.

5. The energy storage system according to claim 4, characterized in that: The barrier has a distance from the rack frame that increases toward an end portion of the barrier.

6. The energy storage system according to claim 2, characterized in that: The volume of the accommodating portion is larger than the volume of the coolant circulating through the battery module.

7. The energy storage system according to claim 2, characterized in that: The energy storage system further comprises: a drain hole configured to pass through a bottom surface of the container and communicate with the accommodating portion; and The opening and closing member is configured to open or close the discharge hole.

8. The energy storage system according to claim 7, characterized in that: The relief hole is between the housing frame and the blocking member.

9. The energy storage system according to claim 7, characterized in that: The opening and closing member includes a drain cover detachably coupled to the drain hole.

10. The energy storage system according to claim 9, characterized in that: The drain cover is elastically deformable and configured to be inserted into the drain hole.

11. The energy storage system according to claim 7, characterized in that: The opening and closing member comprises: an on-off valve connected to the bleed hole and configured to generate a driving force to open or close the bleed hole; a detection member configured to detect a liquid level of the coolant accommodated in the accommodation portion; and An opening and closing control unit is configured to control the operation of the opening and closing valve based on the data detected by the detection member.

12. The energy storage system according to claim 1, characterized in that: The cooling line faces the first surface of the battery module, and the cooling line includes: a supply pipe on the outside of the rack frame; a discharge pipe spaced apart from the supply pipe and configured to discharge the coolant; a first branch pipe extending from the supply pipe and configured to deliver the coolant supplied from the supply pipe to the battery module; and A second branch pipe extends from the discharge pipe and is configured to transfer the coolant discharged from the battery module to the discharge pipe.

13. The energy storage system according to claim 12, characterized in that: The supply pipe and the discharge pipe are parallel to a first direction, the first direction is parallel to the first surface of the battery module, and The first branch pipe and the second branch pipe are parallel to the first surface and parallel to a second direction intersecting the first direction.

14. The energy storage system according to claim 13, characterized in that: The battery module includes a first battery module and a second battery module, the first battery module and the second battery module are alternately positioned in the second direction, and The supply pipe is between the first battery module and the second battery module, and opposite sides of the first branch pipe are connected to the first battery module and the second battery module, respectively.

15. The energy storage system according to claim 14, characterized in that: The discharge pipe comprises: a first discharge pipe spaced apart from the supply pipe, with the first battery module interposed between the first discharge pipe and the supply pipe; and a second discharge pipe spaced apart from the supply pipe, with the second battery module interposed between the second discharge pipe and the supply pipe, and The second branch pipe comprises: a first exhaust branch pipe extending from the first exhaust pipe and connected to the first battery module; and A second exhaust branch pipe extends from the second exhaust pipe and is connected to the second battery module.

16. The energy storage system according to claim 13, characterized in that: The energy storage system further includes a fire extinguishing pipeline, through which fire extinguishing liquid is sprayed onto the battery module. The fire extinguishing pipeline faces the first surface.

17. The energy storage system according to claim 16, characterized in that: The fire extinguishing pipeline comprises: a fire extinguishing supply pipe spaced apart from the supply pipe and the discharge pipe of the cooling line and parallel to the first direction; and A spray pipe extends from the fire extinguishing supply pipe toward the interior of the rack frame.

18. The energy storage system according to any one of claims 12 to 17, characterized in that: The energy storage system further includes a control module connected to the battery module and configured to control the operation of the battery module. The control module faces a second surface of the battery module that is opposite to the first surface.

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