Energy storage system

Abstract

The present disclosure relates to an energy storage system, and an object is to provide an energy storage system capable of efficient thermal management and self-extinguishing when a battery cell is ignited. To this end, the present disclosure provides an energy storage system comprising: a housing configured to contain a cooling fluid; a battery cell disposed inside the case and immersed in the cooling fluid; a support member provided inside the case and supporting the battery cells; and a heat dissipation member connected to the housing and dissipating heat generated inside the housing. According to one or more embodiments of the present disclosure, the battery cells can be directly immersed in the cooling fluid inside the housing, and thus the cooling effect of the battery cells can be further improved.

Description

Technical Field

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

[0002] Generally speaking, an energy storage system (ESS) is a device that can store surplus electricity or electricity generated using renewable energy. An ESS can be configured by installing multiple battery modules in racks and housing the racks in containers. Battery modules can be constructed by assembling multiple electrically connected secondary batteries into various configurations.

[0003] Methods for cooling energy storage systems include air cooling and water cooling. Unlike air cooling, which can result in significant temperature variations between battery cells and the occurrence of locally high-temperature zones, water cooling offers the advantages or desirable characteristics of targeted temperature management and effective cooling control. However, in water-cooled energy storage systems, because the battery cells are located within a closed container, there is a risk of potential safety incidents if the battery cells ignite, such as explosions caused by excessive internal pressure increases.

[0004] The above information is provided for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute related (or prior) art. Utility Model Content

[0005] One aspect of an embodiment according to the present disclosure is directed to an energy storage system that can effectively manage heat and self-extinguish when a battery cell ignites.

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

[0007] According to one or more embodiments of the present disclosure, an energy storage system includes: a housing configured to contain a cooling fluid and having a bottom surface; a battery cell inside the housing and immersed in the cooling fluid; a support member inside the housing and configured to support the battery cell; and a heat dissipation member connected to the housing and configured to dissipate heat generated inside the housing.

[0008] The battery cell may include: a cell case; an electrode assembly accommodated inside the cell case; and a vent member facing a bottom surface of the case, the vent member configured to open when internal pressure of the cell case increases.

[0009] The support member may include a first support member to support a lower side of the battery cell; and a second support member facing the first support member and to support an upper side of the battery cell.

[0010] The first support member may include a first support body surrounding a lower side of the battery cell, a discharge portion formed through the first support body and arranged to face the exhaust member, and a seat portion extending from the first support body and contacting a bottom surface of the case.

[0011] The discharge portion may be spaced apart from a bottom surface of the housing.

[0012] The heat dissipation member may include a plurality of heat dissipation fins protruding from the housing.

[0013] The case may include a case body, a cover facing the case body, and a gasket between the case body and the cover.

[0014] The gasket may be inserted into a gasket groove concavely formed toward the interior of the case body.

[0015] The energy storage system may further include a release member installed in the case and configured to rupture when the internal pressure of the case increases to a set pressure or higher.

[0016] The energy storage system may further include a blocking member disposed to face the release member and configured to block a flame generated inside the housing from being discharged to the outside of the housing.

[0017] The blocking member may include a plurality of mesh nets stacked in a direction from the interior of the housing toward the releasing member.

[0018] According to another aspect of the present disclosure, an energy storage system includes: a housing configured to accommodate a cooling fluid and having a bottom surface; a battery cell inside the housing and immersed in the cooling fluid; a support member inside the housing and configured to support the battery cell; and a circulation member connected to the housing and configured to circulate the cooling fluid.

[0019] The battery cell may include: a cell case; an electrode assembly accommodated inside the cell case; and a vent member facing a bottom surface of the case, the vent member configured to open when internal pressure of the cell case increases.

[0020] The circulation member may include: a first port connected to the housing and configured to supply a cooling fluid into the housing; a second port spaced apart from the first port and configured to discharge the cooling fluid from the interior of the housing; a circulation line connected to the first port and the second port; a driving pump installed in the circulation line and configured to transfer the cooling fluid discharged from the second port to the first port; and a refrigerator installed in the circulation line and configured to cool the cooling fluid moving along the circulation line.

[0021] The first port may include: a first port housing, fixed to the shell and connected to the interior of the shell; a first plug member, movably mounted in the first port housing and configured to open or close the first port housing according to its movement direction; and a first adjustment member, connected to the first plug member and configured to adjust the movement direction of the first plug member, and the second port may include: a second port housing, fixed to the shell and connected to the interior of the shell; a second plug member, movably mounted in the second port housing and configured to open or close the second port housing according to its movement direction; and a second adjustment member, connected to the second plug member and configured to adjust the movement direction of the second plug member.

[0022] The first adjustment member may include: a first elastic member arranged on one side of the first plug member and configured to press the first plug member in a direction in which the first port housing is closed; and a first pressing member arranged on the other side of the first plug member and configured to selectively press the first plug member in a direction in which the first port housing is opened.

[0023] The second adjustment member may include: a second elastic member arranged on one side of the second plug member and configured to press the second plug member in a direction in which the second port housing is closed; and a second pressing element arranged on the other side of the second plug member and configured to selectively press the second plug member in a direction in which the second port housing is opened.

[0024] The energy storage system may further include: a detection sensor configured to detect a liquid level of the cooling fluid inside the housing; and a control module configured to control an operation of the circulation member according to data detected by the detection sensor.

[0025] The energy storage system may further include a heat dissipation member connected to the housing and configured to dissipate heat generated inside the housing.

[0026] The heat dissipation member may include a plurality of heat dissipation fins protruding from the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings attached to this specification illustrate some embodiments of the present disclosure and, together with the detailed description of the present disclosure, further describe aspects and features of the present disclosure. However, the present disclosure should not be interpreted as being limited to the accompanying drawings.

[0028] The above and other objects, features and advantages of the present disclosure will become more apparent to those skilled in the art by describing in more detail exemplary embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0029] Figure 1 is a perspective view schematically illustrating the configuration of an energy storage system according to an embodiment of the present disclosure;

[0030] Figure 2 is a side sectional view schematically illustrating the configuration of an energy storage system according to an embodiment of the present disclosure;

[0031] Figure 3 A front cross-sectional view schematically illustrating the configuration of an energy storage system according to an embodiment of the present disclosure;

[0032] Figure 4 is a cross-sectional view schematically illustrating the configuration of a housing according to an embodiment of the present disclosure;

[0033] Figure 5 is a perspective view schematically illustrating the configuration of a housing according to an embodiment of the present disclosure;

[0034] Figure 6 is an exploded perspective view schematically illustrating the configuration of a support member according to an embodiment of the present disclosure;

[0035] Figure 7 A view schematically illustrating the configuration of a release member according to an embodiment of the present disclosure;

[0036] Figure 8 A view schematically illustrating a configuration of a blocking member according to an embodiment of the present disclosure;

[0037] Figure 9 is an exploded perspective view schematically illustrating the configuration of an energy storage system according to an embodiment of the present disclosure;

[0038] Figure 10 A diagram schematically illustrating the configuration of a circulation member according to an embodiment of the present disclosure;

[0039] Figure 11 A diagram schematically illustrating the configuration of a first port and a second port;

[0040] Figure 12 A block diagram schematically illustrating the configuration of a detection sensor and a control module;

[0041] Figures 13 to 16 A diagram schematically illustrating a process of adjusting the liquid level of a cooling fluid;

[0042] Figure 17 is an exploded perspective view schematically illustrating a configuration of an energy storage system according to yet another embodiment of the present disclosure; and

[0043] Figure 18 The block diagram schematically illustrates the configuration of an energy storage system according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0044] Herein, some embodiments of the present disclosure will be described in further detail with reference to the accompanying drawings. The terms or words used in this specification and claims should not be interpreted as being limited to the ordinary meaning or dictionary meaning, and should be interpreted as having meanings and concepts consistent with the technical idea of ​​the present disclosure based on the principle that the utility model can be his / her own lexicon compiler to appropriately define the concept of the term.

[0045] The embodiments described in this specification and the configurations shown in the accompanying drawings are provided as example embodiments of the present disclosure and do not represent all technical ideas, aspects, and features of the present disclosure. Therefore, it should be understood that various equivalents and modifications may exist, which may replace or modify the embodiments described herein at the time of filing this application.

[0046] It should be understood that when an element or layer is referred to as being “on,” “connected to,” “linked to,” or “coupled to” another element or layer, it may be directly on, connected to, linked to, or coupled to the other element or layer, or one or more intervening elements or layers may be present. When an element or layer is referred to as being “directly on,” “directly connected to,” “directly linked to,” or “directly coupled to” another element or layer, there are no intervening elements or layers. For example, when a first element is described as being “coupled to” or “connected to” a second element, the first element may be directly coupled or connected to the second element, or the first element may be indirectly coupled or connected to the second element via one or more intervening elements.

[0047] In the accompanying drawings, the sizes of various elements, layers, etc. may be exaggerated for clarity of illustration. The same reference numerals designate the same or similar elements. As used herein, the term "and / or" includes any and all combinations of one or more of the relevant enumerated items. Further, the use of "may" when describing an embodiment of the present disclosure relates to "one or more embodiments of the present disclosure." Expressions, such as "at least one of..." and "any of...", when before / after a list of elements, modify the entire list of elements and do not modify a single element in the list. When phrases such as "at least one of A, B, and C," "at least one selected from the group of A, B, and C," or "selected from at least one of A, B, and C" are used to specify a list of elements A, B, and C, the phrase may 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" and "for" may be considered synonymous with the terms "utilize" and "utilized for," respectively. As used herein, the terms "substantially," "about," and similar terms are used as terms of approximation and not as terms of degree, and are intended to account for the inherent variations in measurements or calculations that those of ordinary skill in the art would recognize.

[0048] It should be understood that although the terms "first," "second," and "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.

[0049] For ease of description, spatially relative terms such as "below," "beneath," "below," "above," and "on" may be used herein to describe the relationship of one element or feature to another element or feature as illustrated in the figures. It should be understood that spatially 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 figure is flipped, an element or feature described as being "below" or "beneath" other elements or features will be oriented as being "above" or "above" the other elements or features. Thus, the term "below" can encompass both above and below orientations. The device can be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0050] The terms used in this article are for the purpose of describing the 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 "a" and "an" are intended to include the plural forms as well. It should be further understood that the terms "comprise" and / or "comprising" when used in this specification indicate the presence of a narrated feature, integer, step, operation, element, component and / or group, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0051] Moreover, any numerical range disclosed and / or recorded in this article is intended to include all sub-ranges with the same numerical precision contained in the recorded range. For example, the range of "1.0 to 10.0" is intended to include (and include) all sub-ranges between the listed minimum value of 1.0 and the listed maximum value of 10.0, that is, 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 limit listed in this article is intended to include all lower numerical limits contained therein, and any minimum numerical limit listed in this specification is intended to include all higher numerical limits contained therein. Accordingly, the applicant reserves the right to amend this specification (including the claims) to explicitly list any sub-ranges contained in the range explicitly listed herein.

[0052] 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 situations where the art considers them to have relatively low deviations, such as deviations of 5% or less. Additionally, when a parameter is referred to as uniform in a given region, this may mean that it is uniform with respect to an average value.

[0053] Throughout the specification, unless otherwise stated, each element may be in the singular or in the plural.

[0054] When any element is referred to as being arranged (or placed or positioned or provided) "on (or under)" or "on (or under)" a component, it may mean that the any element is placed in contact with the upper (or lower) surface of the component, and may also mean that another component may be interposed between the component and any element arranged (or placed or positioned or provided) on (or under) the component.

[0055] In addition, when a part is referred to as being “electrically coupled” to another part, the part may be directly electrically connected to the other part, or one or more intervening parts may be present therebetween such that the part and the other part are indirectly electrically connected to each other.

[0056] Throughout this specification, unless otherwise specified, when "A and / or B" is mentioned, it refers to A, B, or A and B. That is, "and / or" includes any or all combinations of the listed items. Unless otherwise specified, when "C to D" is mentioned, it refers to C or more and D or less.

[0057] The terms used in this specification are used to describe the embodiments of the present disclosure and are not intended to limit the scope of the present disclosure.

[0058] Figure 1 2 is a perspective view schematically illustrating a configuration of an energy storage system according to an embodiment of the present disclosure. Figure 2 is a side sectional view schematically illustrating the configuration of an energy storage system according to an embodiment of the present disclosure, and Figure 3 It is a front cross-sectional view schematically illustrating the configuration of an energy storage system according to an embodiment of the present disclosure.

[0059] refer to Figures 1 to 3 , the energy storage system according to this embodiment includes a housing 100 , a battery cell 200 , a support member 300 and a heat dissipation member 400 .

[0060] The housing 100 may shape the appearance of the energy storage system (e.g., form a schematic appearance of the energy storage system) and support (e.g., completely support) the battery cells 200, the support member 300, and the heat dissipation member 400. The cooling fluid C may be accommodated inside the housing 100. The cooling fluid C is a fluid that can cool the battery cells 200 (to be described more below) by heat exchange with the battery cells 200, and may be a phase-change dielectric liquid material whose phase changes to a liquid or gaseous state based on a set temperature. For example, the cooling fluid C may include Novec 7000 (e.g., 3M TM Novec TM 7000) series coolants.

[0061] Figure 4 is a cross-sectional view schematically illustrating the configuration of a housing according to an embodiment of the present disclosure, and Figure 5 It is a perspective view schematically illustrating the configuration of a housing according to an embodiment of the present disclosure.

[0062] refer to Figures 1 to 5 , the housing 100 may include a housing body 110 , a cover 120 , a gasket 130 , and a fastening member 140 .

[0063] The housing body 110 may form the exterior of the lower side of the housing 100 and provide a space for accommodating the cooling fluid C. For example, the housing body 110 may be formed in the shape of a box having an empty interior (e.g., an interior) and an open upper side. The design of the height and area of ​​the housing body 110, etc., may be appropriately changed in various ways according to the size and number of the battery cells 200, etc., which will be described in more detail below. The cooling fluid C may be accommodated inside the housing body 110 at a set or predetermined height. The height of the cooling fluid C may be less than the height of the housing body 110. Therefore, space for phase change of the cooling fluid C may be provided inside the housing body 110.

[0064] The width direction of the housing body 110 described below may be parallel to the width direction of the housing body 110. Figure 1 The longitudinal direction of the housing body 110 may be parallel to the X-axis direction. Figure 1 The Y-axis direction of the housing body 110 may be parallel to the vertical direction or the height direction of the housing body 110. Figure 1 The direction of the Z axis.

[0065] The cover 120 may form an exterior of an upper side of the case 100 and open or close an inner space of the case body 110. The cover 120 may be formed to have a plate shape and may be disposed to face an upper surface of the case body 110.

[0066] The cover 120 can be detachably coupled to the housing body 110. For example, the cover 120 can be fixed to the upper surface of the housing body 110 or separated from the upper surface of the housing body 110 by a fastening member 140, which will be described in more detail below. The fastening member 140 can be formed in the shape of a bolt having a thread on its outer circumferential surface. The fastening member 140 can pass vertically through the cover 120 and the housing body 110 after the cover 120 is seated (e.g., placed or arranged) on the upper surface of the housing body 110, and can be coupled to the cover 120 and the housing body 110 using a screw connection method. The fastening member 140 can be provided as a plurality of fastening members 140. The plurality of fastening members 140 can be arranged to be spaced apart from each other at set or predetermined intervals along the upper surface of the housing body 110 (e.g., in the extending direction of the upper surface of the housing body 110).

[0067] The gasket 130 is disposed between the housing body 110 and the cover 120 and seals the gap between the housing body 110 and the cover 120. That is, the gasket 130 can serve as a component that prevents the cooling fluid C contained in the housing body 110 from being discharged into the gap between the housing body 110 and the cover 120. The gasket 130 can be formed into a hollow ring shape and can be arranged to face the upper surface of the housing body 110. The gasket 130 can be made of an elastically deformable material such as rubber or silicone. The gasket 130 can be inserted into the gasket groove 111, which is formed concavely toward the interior of the housing body 110, for example, recessed downward from the upper surface of the housing body 110. In this case, the upper end portion of the gasket 130 can protrude upward from the housing body 110 by a set or predetermined distance. When the cover 120 is seated or disposed on the upper surface of the case body 110 , the gasket 130 may be compressed up and down by its own elastic restoring force and may be adhered (eg, firmly adhered) to the cover 120 and the case body 110 .

[0068] The gasket 130 may include a groove 131. The groove 131 may be a portion of the entire cross-section of the gasket 130, the inner surface of which is provided to surround the circumferential surface of the fastening member 140. The curvature of the groove 131 may be appropriately changed in various ways according to the diameter of the fastening member 140, etc. The groove 131 may be provided as a plurality of grooves 131. The plurality of grooves 131 may be provided to be spaced apart from each other at set or predetermined intervals in the longitudinal direction of the gasket 130.

[0069] The battery cell 200 may serve as a unit structure for storing and supplying power in an energy storage system.

[0070] An example of a battery cell 200 may include a prismatic secondary battery in which an electrode assembly 211 including a positive electrode plate and a negative electrode plate provided on both sides of a separator is housed inside a cell case 210 and capable of charging or discharging a predetermined amount of electricity. The electrode assembly 211 may be formed in a wound form in which the positive electrode plate, the separator, and the negative electrode plate are wound into a roll, or may be formed in a laminated form in which the positive electrode plate, the separator, and the negative electrode plate are stacked on top of each other.

[0071] The battery cells 200 may be disposed inside the housing 100, for example, inside the housing body 110. The battery cells 200 may be immersed in the cooling fluid C inside the housing body 110. The cooling fluid C may cool the battery cells 200 through heat exchange with the battery cells 200. In this case, a portion of the cooling fluid C may change phase to a gaseous state, and the portion of the cooling fluid C may move to the space above the housing body 110.

[0072] A vent 220 that opens when the internal pressure of the cell housing 210 increases may be formed on one surface of the cell housing 210. The vent 220 may be disposed at a central portion of one surface of the cell housing 210. The vent 220 may be disposed facing the housing 100, for example, facing the bottom surface of the housing body 110. Therefore, when the battery cell 200 explodes or catches fire, the vent 220 may prevent or substantially prevent gas or other moving or flying products from directly impacting the cover 120.

[0073] A pair of cell tabs 230 electrically connected to the electrode assembly 211 may be formed to protrude from one surface of the cell case 210 in which the exhaust member 220 is formed. The pair of cell tabs 230 may be respectively connected to different electrodes of the electrode assembly 211. The pair of cell tabs 230 may be provided on both sides of the exhaust member 220 with the exhaust member 220 interposed therebetween.

[0074] The battery cells 200 may be provided as a plurality of battery cells 200. The plurality of battery cells 200 may be arranged in a plurality of rows in the width direction of the housing body 110 within the housing body 110. Hereinafter, an example will be described in which the plurality of battery cells 200 are arranged in two rows in the width direction of the housing body 110. The plurality of battery cells 200 provided in any one row may be arranged in one row in the longitudinal direction of the housing body 110.

[0075] The support member 300 may serve as a component disposed inside the case 100 and supporting the battery cells 200 inside the case 100. Therefore, the support member 300 may prevent or substantially prevent the positions of the battery cells 200 from being randomly changed inside the case 100.

[0076] Figure 6It is an exploded perspective view schematically illustrating the configuration of a support member according to an embodiment of the present disclosure.

[0077] refer to Figure 2 、 Figure 3 and Figure 6 , the support member 300 may include a first support member 310 and a second support member 320 .

[0078] The first support member 310 may form an outer portion of one side (eg, a lower side) of the support member 300 and support the lower side of the battery cell 200 .

[0079] The first support member 310 may include a first support body 311 , a discharge portion 312 , and a seating portion 313 .

[0080] The first support body 311 may be formed in the shape of a box having a hollow interior and an open upper surface. The lower surface of the first support body 311 may be arranged to face the bottom surface of the housing body 110. The battery cell 200 may be inserted into the first support body 311 through the open upper surface of the first support body 311. The height of the first support body 311 may be smaller than the height of the battery cell 200. The inner surface of the first support body 311 may be arranged to be a circumferential surface surrounding the lower side of the battery cell 200. A plurality of bus bars electrically connected to the cell tabs 230 of the battery cell 200 may be mounted on the first support body 311.

[0081] A first lower partition 311 a and a second lower partition 311 b may be formed in the first support body 311 .

[0082] The first lower partition 311a may protrude upward from the bottom surface of the first support body 311 and extend in a direction parallel to the longitudinal direction of the case body 110. The first lower partition 311a may be inserted between the battery cells 200 disposed adjacent to each other in the width direction of the case body 110. Therefore, the first lower partition 311a may allow the interval between the battery cells 200 disposed adjacent to each other in the width direction of the case body 110 to remain constant.

[0083] The second lower separator 311b may protrude upward from the bottom surface of the first support body 311 and extend in a direction parallel to the width direction of the housing body 110. The second lower separator 311b may be provided as a plurality of second lower separators 311b. The plurality of second lower separators 311b may be provided to be spaced apart from each other in the longitudinal direction of the housing body 110. Each of the second lower separators 311b may be inserted between a pair of battery cells 200 disposed adjacent to each other in the longitudinal direction of the housing body 110. Therefore, the second lower separator 311b may allow the spacing between the battery cells 200 disposed adjacent to each other in the longitudinal direction of the housing body 110 to remain constant.

[0084] The discharge portion 312 may be formed through the first support body 311 and may discharge gas, moving or flying products, etc., discharged from the exhaust member 220 to the outside of the first support body 311. The discharge portion 312 may protrude downward from the lower surface of the first support body 311. The two (e.g., opposing) end portions of the discharge portion 312 may be formed to be open and each may be disposed to face the bottom surface of the housing body 110 and the exhaust member 220, respectively. The lower end portion of the discharge portion 312 may be disposed to be spaced apart from the bottom surface of the housing body 110. Therefore, when the exhaust member 220 is open, the discharge portion 312 may allow (e.g., enable) gas, moving or flying products, etc. discharged from the exhaust member 220 to be discharged (e.g., smoothly discharged) to the outside of the first support body 311, while simultaneously allowing (e.g., enabling) the cooling fluid C to be introduced into the exhaust member 220. The discharge portion 312 may be provided as a plurality of discharge portions 312. A plurality of discharge portions 312 may be provided to face the exhaust members 220 of different battery cells 200 , respectively.

[0085] The seat portion 313 may serve as a support (eg, a complete support) relative to the bottom surface of the housing body 110.

[0086] The support portion 313 is a component of the first support body 311. The support portion 313 may extend vertically downward from the lower surface of the first support body 311 and may contact the housing 100 (for example, the bottom surface of the housing body 110). The longitudinal direction of the support portion 313 may be parallel to the longitudinal direction of the housing body 110. The height of the support portion 313 may be greater than the height of the discharge portion 312. Therefore, the support portion 313 may enable (for example, enable) the discharge portion 312 to be spaced apart from the bottom surface of the housing body 110. The support portion 313 may be provided as a plurality of support portions 313. The plurality of support portions 313 may be arranged to be spaced apart from each other in the width direction of the housing body 110.

[0087] The second support member 320 may form an outer portion of the other side (eg, upper side) of the support member 300 and support an upper side of the battery cell 200. The second support member 320 may face the first support member 310.

[0088] The second support member 320 may include a second support body 321 , a first upper partition 322 , and a second upper partition 323 .

[0089] The second support body 321 may be formed in an open box shape with a hollow interior and an open lower surface. The upper surface of the second support body 321 may be arranged to face the lower surface of the cover 120. The upper surface of the second support body 321 may be spaced apart from the lower surface of the cover 120 by a set or predetermined distance. Thus, the second support body 321 can provide a space in which a portion of the cooling fluid C, whose phase has changed to a gaseous state, can be located between the cover 120 and the second support body 321.

[0090] The upper end portion of the battery cell 200 may be inserted into the second support body 321 through the opened lower surface of the second support body 321. The inner surface of the second support body 321 may be provided as a circumferential surface surrounding the upper side of the battery cell 200.

[0091] The height of the second support body 321 may be smaller than the height of the battery cell 200. The sum of the heights of the first support body 311 and the second support body 321 may be greater than the height of the battery cell 200. In this case, the side surface of the second support body 321 may be coupled to the side surface of the first support body 311 by welding, bolting, etc. while being in contact with the side surface of the first support body 311.

[0092] The first upper separator 322 may protrude downward from the top surface of the second support body 321 and extend in a longitudinal direction parallel to the case body 110. The first upper separator 322 may be inserted between the battery cells 200 disposed adjacent to each other in the width direction of the case body 110. Therefore, the first upper separator 322, together with the first lower separator 311a, may allow the spacing between the battery cells 200 disposed adjacent to each other in the width direction of the case body 110 to remain constant.

[0093] The second upper separator 323 may protrude downward from the top surface of the second support body 321 and extend in a direction parallel to the width direction of the case body 110. The second upper separator 323 may be provided as a plurality of second upper separators 323. The plurality of second upper separators 323 may be provided to be spaced apart from each other in the longitudinal direction of the case body 110. Each of the second upper separators 323 may be inserted between a pair of battery cells 200 disposed adjacent to each other in the longitudinal direction of the case body 110. Therefore, the second upper separator 323, together with the second lower separator 311b, may allow the spacing between the battery cells 200 disposed adjacent to each other in the longitudinal direction of the case body 110 to remain constant.

[0094] The heat dissipation member 400 may be connected to the housing 100 and dissipate generated heat from the inside of the housing 100 to the outside of the housing 100 .

[0095] The heat dissipation member 400 may include a plurality of heat dissipation fins 410 .

[0096] The heat sink 410 may protrude upward from the housing 100, for example, from the upper surface of the cover 120. The heat sink 410 may be formed to have a thin plate shape. The heat sink 410 may be made of a material with high thermal conductivity, such as aluminum. The longitudinal direction of the heat sink 410 may be parallel to the longitudinal direction of the housing body 110. In this case, a plurality of heat sinks 410 may be arranged in multiple rows in the width direction of the housing body 110. The heat sink 410 may cool the battery cells 200 and exchange heat with a portion of the cooling fluid C whose phase has changed to a gaseous state. Thereafter, the heat sink 410 may discharge the heat received from the cooling fluid C to the outside air to change the phase of the cooling fluid C back to a liquid state (for example, by cooling the temperature of the cooling fluid C to change the phase of the cooling fluid C back to a liquid state). Therefore, even if the cooling fluid C is not replaced, the heat sink 410 can guide (for example, enable) the battery cells 200 to continue cooling.

[0097] Figure 7 is a view schematically illustrating a configuration of a release member according to an embodiment of the present disclosure, and Figure 8 is a view schematically illustrating a configuration of a blocking member according to an embodiment of the present disclosure.

[0098] refer to Figure 7 and Figure 8 The energy storage system according to this embodiment may further include a releasing member 500 and a blocking member 600 .

[0099] The release member 500 may be installed in the housing 100 and rupture when the internal pressure of the housing 100 increases to a set pressure or higher. That is, when the internal pressure of the housing 100 excessively increases due to explosion or fire of the battery cell 200, the release member 500 may serve as a component for releasing the internal pressure of the housing 100 by opening the internal space of the housing 100.

[0100] The release member 500 may include a rupture disk 510 and a rupture guide groove 520 .

[0101] The rupture disk 510 may be formed in the shape of a plate or film having a thickness smaller than that of the cover 120. The rupture disk 510 may be provided to block the through-hole 121 formed through one side of the cover 120. The edge (e.g., the edge side) of the rupture disk 510 may be fixed to the cover 120 by welding, adhesive, etc. The upper surface and the lower surface of the rupture disk 510 may be provided to face the external space of the cover 120 and the internal space of the housing body 110, respectively.

[0102] The rupture guide groove 520 may be formed in the shape of a cutout recessed from the surface of the rupture disk 510. The rupture guide groove 520 may be formed to have a substantially C-shape. The rupture guide groove 520 may be provided as a pair of rupture guide grooves 520, and the pair of rupture guide grooves 520 may be arranged to face each other on the rupture disk 510. The two (e.g., opposing) end portions of the pair of rupture guide grooves 520 may be arranged to be spaced apart from each other. When the internal pressure of the housing body 110 increases to a set pressure or higher, the rupture guide groove 520 may rupture. Therefore, the center portion of the rupture disk 510 may open around the rupture guide groove 520, and gas generated inside the housing body 110 may be discharged to the outside.

[0103] Blocking member 600 may be disposed facing release member 500 and may prevent flames generated inside housing 100 from being discharged to the outside. Specifically, blocking member 600 may function as a component that allows gas generated inside housing 100 to pass through through-hole 121 when release member 500 ruptures, while simultaneously preventing flames from passing through through-hole 122. Thus, blocking member 600 may prevent flames from spreading to adjacent facilities (e.g., cells) of the energy storage system.

[0104] The blocking member 600 may include a plurality of mesh nets 610 .

[0105] The mesh net 610 may be formed in the shape of a plate with a plurality of meshes. The mesh net 610 may be made of a high-strength, high-heat-resistant metal material such as aluminum or stainless steel. A plurality of mesh nets 610 may be disposed below and parallel to the rupture disk 510. The plurality of mesh nets 610 may be stacked sequentially in a direction from the interior space of the housing body 110 toward the rupture disk 510.

[0106] The plurality of mesh nets 610 may be supported on the underside of the rupture disk 510 by a support bracket 620 fixed to the lower surface of the cover 120. The plurality of mesh nets 610 may be coupled to the support bracket 620 by various suitable coupling methods such as welding, bolting, and assembly. The specific shape of the support bracket 620 is not limited to Figure 8 The shape illustrated in FIG, and the design of the support bracket 620 can be changed to various suitable shapes capable of supporting a plurality of mesh nets 610 in a stacked state.

[0107] Hereinafter, an energy storage system according to another embodiment of the present disclosure will be described.

[0108] Figure 9 The figure is an exploded perspective view schematically illustrating the configuration of an energy storage system according to an embodiment of the present disclosure.

[0109] refer to Figure 9, the energy storage system according to this embodiment may include a case 100 , a battery cell 200 , a support member 300 , and a circulation member 700 .

[0110] The case 100, the battery cell 200, and the support member 300 according to this embodiment may be similar to those in the reference Figures 1 to 8 The case 100 , the battery cell 200 , and the support member 300 according to an embodiment of the present disclosure are described as being configured in substantially the same manner.

[0111] Therefore, when describing the energy storage system according to the present embodiment, only the circulation member 700 that is not described in the energy storage system according to an embodiment of the present disclosure will be described.

[0112] The circulation member 700 may be connected to the housing 100 and serve as a component that circulates the cooling fluid C. Therefore, the circulation member 700 may allow the temperature of the cooling fluid C to be maintained constant during operation of the battery cell 200 .

[0113] Figure 10 The figure schematically illustrates the configuration of a circulation member according to an embodiment of the present disclosure.

[0114] refer to Figure 10 The circulation component 700 may include a first port 710 , a second port 720 , a circulation line 730 , a driving pump 740 , and a refrigerator 750 .

[0115] The first port 710 may be connected to the housing 100 and supply the cooling fluid C to the housing 100 .

[0116] Figure 11 is a view schematically illustrating the configuration of the first port and the second port.

[0117] refer to Figure 11 , the first port 710 may include a first port housing 711 , a first plug member 712 and a first adjustment member 713 .

[0118] The first port housing 711 may be formed in the shape of a tube (e.g., a hollow tube) having a hollow interior and two open ends. The first port housing 711 may include a first large diameter portion 711a fixed to the housing body 110 and a first small diameter portion 711b extending from the first large diameter portion 711a and having a smaller diameter than the first large diameter portion 711a. One end portion of the first large diameter portion 711a may communicate with the interior space of the housing body 110. Due to the diameter difference between the first large diameter portion 711a and the first small diameter portion 711b, a step structure may be formed between the first large diameter portion 711a and the first small diameter portion 711b. The cooling fluid C flowing along the circulation line 730 (described in more detail below) is supplied to the housing body 110 by sequentially passing through the first small diameter portion 711b and the first large diameter portion 711a.

[0119] The first plug member 712 may be movably installed in the first port housing 711 and open or close the first port housing 711 according to a movement direction thereof.

[0120] The first plug member 712 may include a first moving rod 712a and a first plug 712b.

[0121] The first moving rod 712a may be disposed inside the first port housing 711. The longitudinal direction of the first moving rod 712a may be parallel to the longitudinal direction of the first port housing 711, that is, in the direction in which the first large diameter portion 711a and the first small diameter portion 711b extend. The first moving rod 712a may be installed to reciprocate within the first port housing 711 in its longitudinal direction.

[0122] The first plug 712b may be connected to one end of the first moving rod 712a and disposed within the first large diameter portion 711a. The diameter of the first plug 712b may be greater than the diameter of the first small diameter portion 711b. Depending on the direction of movement of the first moving rod 712a, the first plug 712b may contact or separate from the inner surface of the first large diameter portion 711a connected to the first small diameter portion 711b. When the first plug 712b contacts the inner surface of the first large diameter portion 711a connected to the first small diameter portion 711b, the first plug 712b may block the movement of the cooling fluid C between the first large diameter portion 711a and the first small diameter portion 711b. When the first plug 712b separates from the inner surface of the first large diameter portion 711a connected to the first small diameter portion 711b, the first plug 712b may allow the cooling fluid C to move between the first large diameter portion 711a and the first small diameter portion 711b.

[0123] The first adjustment member 713 may be connected to the first plug member 712 and adjust a moving direction of the first plug member 712 .

[0124] The first adjustment member 713 may include a first elastic member 713 a and a first pressing member 713 b .

[0125] The first elastic member 713a may be provided on one side of the first plug member 712 and press (e.g., always press) the first plug member 712 in the direction in which the first port housing 711 is closed. The first elastic member 713a may be formed in the shape of a coil spring capable of expanding and contracting in its longitudinal direction. The two (e.g., opposite) end portions of the first elastic member 713a may be connected to the inner surface of the first large diameter portion 711a connected to the housing body 110 and the first plug 712b, respectively. When no separate external force is applied to the first plug member 712, the first elastic member 713a may make the first plug 712b contact the inner surface of the first large diameter portion 711a connected to the first small diameter portion 711b by its own elastic restoring force.

[0126] A first pressing member 713b may be disposed on the other side of the first plug member 712 and selectively press the first plug member 712 in the direction in which the first port housing 711 opens. The first pressing member 713b may be disposed facing the end portion of the first movable rod 712a disposed within the first small diameter portion 711b. The first pressing member 713b may be mounted within the first small diameter portion 711b to reciprocate in a direction parallel to the longitudinal direction of the first movable rod 712a. The first pressing member 713b may contact or separate from the end portion of the first movable rod 712a in its moving direction. When the first pressing member 713b contacts the end portion of the first movable rod 712a, the first pressing member 713b presses the first movable rod 712a in a direction opposite to the first elastic member 713a, thereby moving the first movable rod 712a in a direction in which the first plug 712b separates from the inner surface of the first large diameter portion 711a connected to the first small diameter portion 711b. The specific shape of the first pressing member 713b is not limited to Figure 11 The shape illustrated in FIG, and the design of the first pressing member 713b can be appropriately changed in various ways within the technical concept of a shape that can press or release the pressing of the first moving rod 712a according to the moving direction. The first pressing member 713b can be manually moved by a worker, or alternatively, can be automatically moved by being connected to a separate actuator such as a motor or solenoid.

[0127] The second port 720 may be connected to the housing 100 and discharge the cooling fluid C from the housing 100 . The second port 720 may be disposed to be spaced apart from the first port 710 .

[0128] The second port 720 may include a second port housing 721 , a second plug member 722 , and a second adjustment member 723 .

[0129] The second port housing 721 may be formed in the shape of a tube (e.g., a hollow tube) having a hollow interior and two open ends. The second port housing 721 may include a second large diameter portion 721a fixed to the housing body 110 and a second small diameter portion 721b extending from the second large diameter portion 721a and having a smaller diameter than the second large diameter portion 721a. One end portion of the second large diameter portion 721a may communicate with the interior space of the housing body 110. Due to the diameter difference between the second large diameter portion 721a and the second small diameter portion 721b, a stepped structure may be formed between the second large diameter portion 721a and the second small diameter portion 721b. The cooling fluid C inside the housing body 110 may be discharged to the circulation line 730 by sequentially passing through the second large diameter portion 721a and the second small diameter portion 721b.

[0130] The second plug member 722 may be movably installed in the second port housing 721 and open or close the second port housing 721 according to a movement direction thereof.

[0131] The second plug member 722 may include a second moving rod 722a and a second plug 722b.

[0132] The second moving rod 722a may be disposed inside the second port housing 721. The longitudinal direction of the second moving rod 722a may be parallel to the longitudinal direction of the second port housing 721, that is, in the extending direction of the second large diameter portion 721a and the second small diameter portion 721b. The second moving rod 722a may be installed in the second port housing 721 to reciprocate in the longitudinal direction.

[0133] The second plug 722b may be connected to one end of the second moving rod 722a and disposed within the second large diameter portion 721a. The diameter of the second plug 722b may be greater than the diameter of the second small diameter portion 721b. Depending on the direction of movement of the second moving rod 722a, the second plug 722b may contact or separate from the inner surface of the second large diameter portion 721a connected to the second small diameter portion 721b. When the second plug 722b contacts the inner surface of the second large diameter portion 721a connected to the second small diameter portion 721b, the second plug 722b may block the flow of cooling fluid C between the second large diameter portion 721a and the second small diameter portion 721b. When the second plug 722b separates from the inner surface of the second large diameter portion 721a connected to the second small diameter portion 721b, the second plug 722b may allow the cooling fluid C to flow between the second large diameter portion 721a and the second small diameter portion 721b.

[0134] The second adjustment member 723 may be connected to the second plug member 722 and adjust a moving direction of the second plug member 722 .

[0135] The second adjustment member 723 may include a second elastic member 723 a and a second pressing member 723 b .

[0136] The second elastic member 723a may be provided on one side of the second plug member 722 and press (e.g., always press) the second plug member 722 in the direction in which the second port housing 721 is closed. The second elastic member 723a may be formed in the shape of a coil spring capable of expanding and contracting in its longitudinal direction. The two (e.g., opposite) end portions of the second elastic member 723a may each be connected to the inner surface of the second large diameter portion 721a connected to the housing body 110 and the second plug 722b. When no separate external force is applied to the second plug member 722, the second elastic member 723a may make the second plug 722b contact the inner surface of the second large diameter portion 721a connected to the second small diameter portion 721b by its own elastic restoring force.

[0137] A second pressing member 723b may be disposed on the other side of the second plug member 722 and selectively press the second plug member 722 in the direction in which the second port housing 721 opens. The second pressing member 723b may be disposed facing the end portion of the second movable rod 722a disposed within the second small diameter portion 721b. The second pressing member 723b may be mounted within the second small diameter portion 721b to reciprocate in a direction parallel to the longitudinal direction of the second movable rod 722a. The second pressing member 723b may contact or separate from the end portion of the second movable rod 722a in its moving direction. When the second pressing member 723b contacts the end portion of the second movable rod 722a, the second pressing member 723b presses the second movable rod 722a in a direction opposite to the second elastic member 723a and moves the second movable rod 722a in a direction in which the second plug 722b separates from the inner surface of the second large diameter portion 721a connected to the second small diameter portion 721b. The specific shape of the second pressing member 723b is not limited to Figure 11 The shape illustrated in FIG, and the design of the second pressing member 723b can be appropriately changed in various ways within the technical concept of a shape that can press or release the second moving rod 722a according to the moving direction. The second pressing member 723b can be manually moved by a worker, or alternatively, can be automatically moved by being connected to a separate actuator such as a motor or solenoid.

[0138] The circulation line 730 can be connected to the first port 710 and the second port 720 and serves as a component that provides a circulation path for the cooling fluid C. The circulation line 730 can be formed in the shape of a tube (e.g., a hollow tube) having a hollow interior and two open ends. One end portion of the circulation line 730 can be connected to the first small diameter portion 711b of the first port housing 711. One end portion of the circulation line 730 can be directly connected to the first small diameter portion 711b, or can be indirectly connected to the first small diameter portion 711b via a first pressing member 713b. The other end portion of the circulation line 730 can be connected to the second small diameter portion 721b of the second port housing 721. The other end portion of the circulation line 730 can be directly connected to the second small diameter portion 721b, or can be indirectly connected to the second small diameter portion 721b via a second pressing member 723b. A storage tank for storing the cooling fluid C can be additionally installed in the circulation line 730.

[0139] The driving pump 740 may be installed in the circulation line 730 and transfer (e.g., deliver) the cooling fluid C discharged from the second port 720 to the first port 710. Examples of the driving pump 740 may include various types of fluid pumps that may receive power from the outside and provide flow force to the cooling fluid C inside the circulation line 730. The driving pump 740 may receive the cooling fluid C discharged from the second port 720 through its inlet and transfer the cooling fluid C to the first port 710 through its outlet.

[0140] The refrigerator 750 may be installed in the circulation line 730 and cool the cooling fluid C moving along the circulation line 730. The refrigerator 750 may be connected to the circulation line 730, and examples of the refrigerator 750 may include various types of heat exchangers capable of exchanging heat with the cooling fluid C moving along the circulation line 730. The refrigerator 750 may be provided on the front end side of the driving pump 740, or may be provided on the rear end side of the driving pump 740.

[0141] Figure 12 It is a block diagram schematically illustrating the configuration of the detection sensor and the control module.

[0142] refer to Figure 12 According to this embodiment, the energy storage system may further include a detection sensor 800 and a control module 900 .

[0143] The detection sensor 800 may detect the liquid level of the cooling fluid C contained inside the housing 100. The detection sensor 800 may include at least one of a contact type liquid level sensor installed inside the housing body 110 to directly detect the liquid level of the cooling fluid C, a non-contact type liquid level sensor, or a flow rate sensor that may indirectly detect the liquid level of the cooling fluid C by measuring the flow rate of the cooling fluid C using the first port 710 and the second port 720.

[0144] The control module 900 may control the operation of the circulation member 700 based on the data detected by the detection sensor 800. That is, the control module 900 may function as a component that actively adjusts the level of the cooling fluid C contained in the housing 100 based on the data of the level of the cooling fluid C detected by the detection sensor 800.

[0145] The control module 900 can monitor the data detected by the detection sensor 800 in real time and can be implemented in the form of an integrated circuit (IC), a microcontroller (μC), a microprocessor, or an application-specific integrated circuit (ASIC). It can actively control the operation of the first port 710, the second port 720, and the drive pump 740 based on the monitored data. Further, the control module 900 may include a communication device that can establish a communication connection with the circulation member 700 and the detection sensor 800 and transmit or receive data through the established communication connection. The communication device can be implemented as a device that performs wireless communication connection through any one of a Bluetooth communication method, a Wi-Fi communication method, a Zigbee communication method, and an NFC communication method, or as a device that performs wired communication through a cable or the like.

[0146] Figures 13 to 16 A view schematically illustrating a process of adjusting the liquid level of a cooling fluid.

[0147] refer to Figures 13 and 14 When the liquid level of the cooling fluid C inside the housing body 110 drops to a set height h1 or less, the control module 900 may operate the second pressing member 723b so that the second pressing member 723b moves in a direction separating from the second moving rod 722a.

[0148] Here, the design of setting the height h1 may be appropriately changed in various manners within a range greater than the height of the battery cell 200 .

[0149] When the second pressing member 723b is separated from the second moving rod 722a, due to the pressure of the cooling fluid C inside the shell body 110 and the elastic force of the second elastic member 723a, the second plug 722b can move in a direction of contacting the inner surface of the second large diameter portion 721a connected to the second small diameter portion 721b, and can close the second port housing 721.

[0150] Also, the control module 900 may operate the first pressing member 713 b such that the first pressing member 713 b moves in a direction to come into contact with the first moving bar 712 a .

[0151] When the first pressing member 713b comes into contact with the first moving rod 712a, due to the pressing force applied from the first pressing member 713b and the pressure of the cooling fluid C introduced into the first small diameter portion 711b, the first plug 712b moves in a direction of separation from the inner surface of the first large diameter portion 711a connected to the first small diameter portion 711b, and the first port housing 711 can be opened.

[0152] Therefore, the flow rate of the cooling fluid C discharged from the interior of the housing body 110 decreases compared to the flow rate of the cooling fluid C supplied to the interior of the housing body 110 , and the liquid level of the cooling fluid C inside the housing body 110 increases.

[0153] Thereafter, when the liquid level of the cooling fluid C inside the housing body 110 exceeds the set height h1, the control module 900 may operate the second pressing member 723b to move in a direction to contact the second moving rod 722a.

[0154] When the second pressing member 723b contacts the second moving rod 722a, the second plug 722b may move in a direction separating from the inner surface of the second large diameter portion 721a connected to the second small diameter portion 721b and may open the second port housing 721.

[0155] At the same time, the control module 900 may operate the first pressing member 713 b so that the first pressing member 713 b moves in a direction to separate from the first moving rod 712 a .

[0156] When the first pressing member 713b is separated from the first moving rod 712a, due to the pressure of the cooling fluid C inside the shell body 110 and the elastic force of the first elastic member 713a, the first plug 712b can move in a direction of contacting the inner surface of the first large diameter portion 711a connected to the first small diameter portion 711b, and can close the first port housing 711.

[0157] Therefore, the flow rate of the cooling fluid C discharged from the interior of the housing body 110 increases compared to the flow rate of the cooling fluid C supplied to the interior of the housing body 110 , and the liquid level of the cooling fluid C inside the housing body 110 decreases.

[0158] refer to Figure 15 and Figure 16 When the cooling fluid C inside the shell body 110 is at the set height h1, the control module 900 can operate the first pressing member 713b and the second pressing member 723b, so that both the first port housing 711 and the second port housing 721 are opened, and the cooling fluid C can be circulated and moved in sequence through the second port 720, the circulation pipeline 730 and the first port 710 by the operation of the driving pump 740.

[0159] The energy storage system according to this embodiment may further include a release member 500 and a blocking member 600. The release member 500 and the blocking member 600 according to this embodiment may be the same as those in the reference embodiment. Figures 1 to 8 The described release member 500 and blocking member 600 according to an embodiment of the present disclosure are configured in substantially the same manner.

[0160] Hereinafter, an energy storage system according to yet another embodiment of the present disclosure will be described.

[0161] Figure 17 is an exploded perspective view schematically illustrating the configuration of an energy storage system according to an embodiment of the present disclosure, and Figure 18 The block diagram schematically illustrates the configuration of an energy storage system according to an embodiment of the present disclosure.

[0162] refer to Figure 17 and Figure 18 , the energy storage system according to the present embodiment may include a case 100 , a battery cell 200 , a support member 300 , a heat dissipation member 400 , and a circulation member 700 .

[0163] refer to Figures 1 to 8 The description of the housing 100, the battery cell 200, the support member 300, and the heat dissipation member 400 according to one embodiment of the present disclosure can be directly applied to the housing 100, the battery cell 200, the support member 300, and the heat dissipation member 400 according to the present embodiment, and with reference to Figures 9 to 16 The description of the circulation member 700 according to another embodiment of the present disclosure may be directly applied to the circulation member 700 according to the present embodiment.

[0164] The energy storage system according to this embodiment may further include a releasing member 500 , a blocking member 600 , a detection sensor 800 , and a control module 900 .

[0165] The releasing member 500 and the blocking member 600 according to this embodiment may be Figures 1 to 8 The releasing member 500 and the blocking member 600 according to an embodiment of the present disclosure are configured in substantially the same manner as described above, and the detection sensor 800 and the control module 900 according to this embodiment can be configured in the same manner as described above. Figures 9 to 16 The detection sensor 800 and the control module 900 according to another embodiment of the present disclosure are described as being configured in substantially the same manner.

[0166] According to one or more embodiments of the present disclosure, the battery cells may be directly immersed in the cooling fluid inside the housing, thereby further improving the cooling effect of the battery cells.

[0167] According to one or more embodiments of the present disclosure, use of the heat dissipation member may prevent or reduce a continuous increase in the temperature of the cooling fluid in the process of cooling the battery cells.

[0168] According to one or more embodiments of the present disclosure, the vent of the battery cell is disposed to face the bottom surface of the case, and thus it is possible to quickly and stably extinguish a fire when the battery cell ignites.

[0169] According to one or more embodiments of the present disclosure, by preventing or substantially preventing the internal pressure of a housing from excessively increasing using a release member, safety accidents such as explosions may be prevented or reduced.

[0170] According to one or more embodiments of the present disclosure, by using a blocking member to block the discharge of flames to the outside of the housing, it is possible to prevent or substantially prevent the flames from spreading to adjacent facilities.

[0171] According to one or more embodiments of the present disclosure, a circulation member may be used to allow the temperature of the cooling fluid contained inside the housing to be kept constant and to prevent or reduce a decrease in cooling efficiency due to stagnation of the cooling fluid.

[0172] According to one or more embodiments of the present disclosure, by actively controlling the liquid level of the cooling fluid contained inside the housing using a detection sensor and a control module, the cooling efficiency of the battery cells may be flexibly changed.

[0173] According to one or more embodiments of the present disclosure, the control module and the cooling module are spaced apart from each other with the battery module interposed therebetween, thereby preventing or reducing damage to the control module caused by coolant leaking from the cooling module.

[0174] According to one or more embodiments of the present disclosure, the volume of the accommodating portion is larger than the volume of the coolant circulating through the plurality of battery modules, so that even when all the coolant circulating through the plurality of battery modules leaks, the coolant can be prevented or substantially prevented from leaking to the outside of the container.

[0175] According to one or more embodiments of the present disclosure, the liquid level of the coolant accommodated in the accommodating portion may be prevented or substantially prevented from excessively rising using the drain hole and the opening / closing member.

[0176] 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 description of the present disclosure.

[0177] Although the present disclosure has been described with reference to the embodiments shown in the drawings, these embodiments are merely illustrative, and it is understood that those skilled in the art can derive various modifications and other equivalent embodiments based on the embodiments.

Claims

1. An energy storage system, characterized in that: include: a housing configured to contain a cooling fluid and having a bottom surface; a battery cell inside the housing and immersed in the cooling fluid; a support member inside the housing and configured to support the battery cell; as well as A heat dissipation member is connected to the housing and is configured to dissipate heat generated inside the housing.

2. The energy storage system according to claim 1, characterized in that The battery cell comprises: Monocoque; an electrode assembly housed inside the single body case; and A vent member faces the bottom surface of the housing, the vent member being configured to open when the internal pressure of the single housing increases.

3. The energy storage system according to claim 2, characterized in that: The support member comprises: a first supporting member for supporting a lower side of the battery cell; and The second support member faces the first support member and supports an upper side of the battery cell.

4. The energy storage system according to claim 3, characterized in that The first supporting member comprises: a first supporting body surrounding the lower side of the battery cell; a discharge portion formed through the first support body and arranged to face the exhaust member; and A seating portion extends from the first support body and contacts the bottom surface of the housing.

5. The energy storage system according to claim 4, characterized in that: The discharge portion is spaced apart from the bottom surface of the housing.

6. The energy storage system according to claim 1, characterized in that The heat dissipation member includes a plurality of heat dissipation fins protruding from the housing.

7. The energy storage system according to claim 1, characterized in that: The housing comprises: Shell body; a cover facing the housing body; and A gasket is between the housing body and the cover.

8. The energy storage system according to claim 7, characterized in that: The gasket is inserted into a gasket groove formed concavely toward the inside of the housing body.

9. The energy storage system according to claim 1, characterized in that: The energy storage system further includes a release member installed in the case and configured to rupture when an internal pressure of the case increases to a set pressure or higher.

10. The energy storage system according to claim 9, characterized in that: The energy storage system further includes a blocking member disposed to face the release member and configured to block a flame generated inside the housing from being discharged to the outside of the housing.

11. The energy storage system according to claim 10, characterized in that: The blocking member includes a plurality of mesh nets stacked in a direction from the interior of the housing toward the release member.

12. An energy storage system, characterized in that: include: a housing configured to contain a cooling fluid and having a bottom surface; a battery cell inside the housing and immersed in the cooling fluid; a support member inside the housing and configured to support the battery cell; as well as A circulation member is connected to the housing and configured to circulate the cooling fluid.

13. The energy storage system according to claim 12, characterized in that: The battery cell comprises: Monocoque; an electrode assembly housed inside the single body case; and A vent member faces the bottom surface of the housing, the vent member being configured to open when the internal pressure of the single housing increases.

14. The energy storage system according to claim 12, characterized in that: The circulation component comprises: a first port connected to the housing and configured to supply the cooling fluid into the housing; a second port spaced apart from the first port and configured to discharge the cooling fluid from an interior of the housing; a circulation line connected to the first port and the second port; a driving pump installed in the circulation line and configured to transfer the cooling fluid discharged from the second port to the first port; and A refrigerator is installed in the circulation line and is configured to cool the cooling fluid moving along the circulation line.

15. The energy storage system according to claim 14, characterized in that: The first port includes: a first port housing secured to the housing and connected to an interior of the housing; a first plug member movably mounted in the first port housing and configured to open or close the first port housing according to a movement direction thereof; and a first adjusting member connected to the first plug member and configured to adjust the moving direction of the first plug member, and The second port includes: a second port housing secured to the housing and connected to an interior of the housing; a second plug member movably mounted in the second port housing and configured to open or close the second port housing according to a movement direction thereof; and A second adjustment member is connected to the second plug member and is configured to adjust the movement direction of the second plug member.

16. The energy storage system according to claim 15, characterized in that: The first adjusting member comprises: a first elastic member disposed on one side of the first plug member and configured to press the first plug member in a direction in which the first port housing is closed; and A first pressing member is disposed on the other side of the first plug member and is configured to selectively press the first plug member in a direction in which the first port housing opens.

17. The energy storage system according to claim 15, characterized in that: The second adjusting member comprises: a second elastic member disposed on one side of the second plug member and configured to press the second plug member in a direction in which the second port housing is closed; and A second pressing member is disposed on the other side of the second plug member and is configured to selectively press the second plug member in a direction in which the second port housing opens.

18. The energy storage system according to claim 12, characterized in that: The energy storage system further comprises: a detection sensor configured to detect a liquid level of the cooling fluid inside the housing; and A control module is configured to control the operation of the circulation member according to the data detected by the detection sensor.

19. The energy storage system according to claim 12, characterized in that: The energy storage system further includes a heat dissipation member connected to the housing and configured to dissipate heat generated inside the housing.

20. The energy storage system according to claim 19, characterized in that The heat dissipation member includes a plurality of heat dissipation fins protruding from the housing.

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