energy storage system

Abstract

An energy storage system according to an embodiment of the present application can include: a battery module including a plurality of secondary battery cells and provided with an electrode tab at one side or both sides; and a case accommodating a module stack in which a plurality of the battery modules are stacked, inside thereof, wherein the case includes: a first cover provided to face at least one of sides of the module stack in which the electrode tab is not provided, and a second cover provided to face at least one of sides of the module stack in which the electrode tab is provided, a flame channel being formed between the first cover and the module stack, and a cooling flow path being formed between the second cover and the module stack.

Description

TECHNICAL FIELD

[0001] The present application relates to an energy storage system. BACKGROUND

[0002] As the technology development and demand for mobile devices, electric vehicles, energy storage systems (ESS), etc. are increasing, the demand for secondary battery cells as an energy source is also rapidly increasing. Since the mutual conversion between chemical energy and electrical energy in a secondary battery cell is reversible, the secondary battery cell is a battery that can be repeatedly charged and discharged.

[0003] Such a secondary battery cell includes a cell main part of an electrode assembly including an anode, a cathode, a separator film, and an electrolyte, etc. as a main component of a secondary battery, and a multi-layered film case for protecting the electrode assembly.

[0004] However, such an electrode assembly generates heat during charging and discharging, and the temperature rise caused by such heat generation reduces the performance of the secondary battery cell.

[0005] Also, when the heat generation is severe, the internal pressure of the secondary battery cell rises, thereby causing a problem of fire of the secondary battery cell.

[0006] In addition, in the case where a plurality of secondary battery cells are installed, such as an energy storage system (ESS), the secondary battery cells explode due to fire, and a problem of flame spreading to other secondary battery cells around occurs.

[0007] For example, in the related art, the electrode tab part of the secondary battery cell does not have a cover part for preventing the entry of flame, and thus when a fire occurs in an adjacent secondary battery cell, the flame easily enters the adjacent secondary battery cell, thereby making it difficult to prevent the spread of the fire.

[0008] Therefore, research on an energy storage system is needed to improve the above-mentioned problems or limitations.

[0009] PRIOR ART DOCUMENT

[0010] (Patent Document 1) Korean Patent Publication No. 10-2015-0061200 SUMMARY

[0011] (1) Technical Problem to be Solved

[0012] The present application aims to provide an energy storage system that can prevent the spread of fire of a secondary battery cell.

[0013] In addition, the present application aims to provide an energy storage system that can prevent the spread of flames to the outside when a secondary battery cell catches fire.

[0014] (II) Technical Solution

[0015] An energy storage system according to an embodiment of the present application can include: a battery module including a plurality of secondary battery cells and provided with an electrode tab at one side or both sides; and a case accommodating a module stack in which a plurality of the battery modules are stacked, inside thereof, wherein the case includes: a first cover provided to face at least one of sides of the module stack in which the electrode tab is not provided; and a second cover provided to face at least one of the sides of the module stack in which the electrode tab is not provided, a flame passage being formed between the first cover and the module stack, and a cooling flow path being formed between the second cover and the module stack.

[0016] According to the present embodiment, the energy storage system can further include: a gasket provided between the first cover and the module stack to maintain a separation distance between the module stack and the first cover.

[0017] According to the present embodiment, the first cover and the second cover can be formed by bending a metal plate.

[0018] According to the present embodiment, the cooling flow path can be formed as an independent passage separate from the flame passage.

[0019] According to the present embodiment, the case can further include: a partition plate provided along a portion at which the first cover and the second cover are connected, and configured to be in contact with the module stack to partition the cooling flow path and the flame passage.

[0020] According to the present embodiment, the energy storage system can further include: a blocking member provided in the flame passage to allow gas to pass therethrough and block flames.

[0021] According to the present embodiment, the blocking member can be formed as a multi-layer mesh or multi-layer baffle of a metal material for cooling flames.

[0022] According to the present embodiment, the energy storage system can further include: a second cooling flow path formed between the stacked battery modules and connected with the cooling flow path.

[0023] According to the present embodiment, each of the battery modules can include a protrusion formed to protrude from an upper surface or a lower surface thereof, and the second cooling flow path can be formed by a space between the battery modules provided to be separated by the protrusion.

[0024] According to the present embodiment, the protrusion can be disposed adjacent to an edge of the battery module, and can be linearly disposed in a direction orthogonal to a length direction of the secondary battery cell.

[0025] According to the present embodiment, the battery module can include a battery cell accommodating a plurality of the secondary battery cells, a main frame member integrating the plurality of battery cells as one, and a cover member integrated to one side or both sides of the electrode tab where the secondary battery cell is disposed, wherein the cover member is disposed between the flame passage and the electrode tab, and can be provided with a plurality of through-holes through which flames or gas pass.

[0026] According to the present embodiment, the battery cell can include a battery cell support member accommodating the secondary battery cell in a side surface portion, and a housing member covering a side surface of the secondary battery cell and integrated to the battery cell support member.

[0027] According to the present embodiment, the housing can further include an upper cover disposed at an upper portion of the module stack, and a lower cover disposed at a lower portion of the module stack.

[0028] According to the present embodiment, the housing can further include a third cover extending from the second cover and disposed at an opposite side of the first cover.

[0029] According to the present embodiment, the energy storage system can further include a third cover disposed side by side with the first cover and disposed in a manner facing another side of the side surfaces of the module stack where the electrode tab is disposed, wherein the first cover and the third cover can be formed in a manner extending from the second cover, respectively.

[0030] (III) Advantages

[0031] The cooling flow path and the flame passage are completely separated in the energy storage system of the embodiment of the present application, and thus even if a fire occurs in the secondary battery cell, the fire can be prevented from being transferred to other secondary battery cells through the cooling flow path. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 FIG. 1 is a perspective view illustrating a battery module according to an embodiment of the present application.

[0033] Figure 2 is Figure 1 FIG. 2 is a partially exploded perspective view of the battery module illustrated in FIG. 1.

[0034] Figure 3 FIG. 3 is a perspective view illustrating a battery cell according to an embodiment of the present application.

[0035] Figure 4is a perspective view showing an energy storage system according to an embodiment of the present application.

[0036] Figure 5 is a sectional view taken along the line I-I' of Figure 4

[0037] Figure 6 is a sectional view taken along the line II-II' of Figure 4

[0038] Figure 7 is an enlarged view of the P portion of Figure 6

[0039] Figure 8 is a sectional view taken along the line III-III' of Figure 4

[0040] Figure 9 is an enlarged sectional view of the Q portion of Figure 6

[0041] BRIEF DESCRIPTION OF DRAWINGS

[0042] 1: battery module

[0043] 10: battery cell

[0044] 11: battery cell support member

[0045] 12: housing member

[0046] 20: main frame member

[0047] 30: cover member

[0048] 100: energy storage system

[0049] 150: housing

[0050] 170: blocking member DETAILED DESCRIPTION

[0051] Preferred embodiments of the present application will be described hereinafter with reference to the accompanying drawings. However, the embodiments of the present application can be modified in various ways, and the scope of the present application should not be limited to the embodiments described below. In addition, the embodiments of the present application are provided in order to more completely explain the present application to those having ordinary skill in the art. The shapes and sizes of components in the accompanying drawings can be exaggerated to more clearly explain the present application.

[0052] In addition, in the present specification, the singular form includes the plural form unless the context clearly indicates otherwise, and the same reference numerals or like reference numerals are assigned to the same components throughout the specification.

[0053] In addition, in the present specification, the singular form includes the plural form unless the context clearly indicates otherwise, and the same reference numerals or like reference numerals are assigned to the same components throughout the specification.​​​​Figure 1 is a perspective view showing a battery module according to an embodiment of the present application, Figure 2 is Figure 1 is a partially exploded perspective view of a battery module shown in Figure 3 is a perspective view showing a battery cell according to an embodiment of the present application.

[0054] Referring to the drawings, a battery module according to an embodiment of the present application includes a battery cell 10 having a plurality of secondary battery cells C, a main frame member 20 which integrates the plurality of battery cells 10, a front cover 25, and a cover member 30.

[0055] The battery cell 10 accommodates the secondary battery cell C, and for this purpose, the battery cell 10 can include a battery cell support member 11 and a housing member 12.

[0056] The battery cell support member 11 provides a space to accommodate the secondary battery cell C. Specifically, a seating portion of a groove shape corresponding to the shape of the secondary battery cell C can be provided on both faces of the battery cell support member 11. Thus, the secondary battery cell C is inserted into the seating portion formed on both faces of the battery cell support member 11 and is coupled to the battery cell support member 11.

[0057] In the present embodiment, the battery cell support member 11 accommodates four secondary battery cells C in total, two on each face. However, the present application is not limited thereto.

[0058] The housing member 12 is coupled to the battery cell support member 11 in a form of covering the side of the secondary battery cell C. For this purpose, the housing member 12 can be provided in a "U" shape. Thus, the housing member 12 can be fitted and coupled to the battery cell support member 11 from the upper or lower portion of the battery cell support member 11 to which the secondary battery cell C is coupled.

[0059] The battery cell support member 11 is coupled with the housing member 12, and thus, the remaining portion of the secondary battery cell C except for the electrode tab E is disposed within the space formed by the battery cell support member 11 and the housing member 12.

[0060] The electrode tab E of the secondary battery cell C is exposed to the outside of the battery cell support member 11. Also, a bus bar B can be fastened to the electrode tab E. Thus, the secondary battery cell C can be electrically connected to the outside through the bus bar B.

[0061] The main frame member 20 integrates the plurality of battery cells 10 to form one battery module 1.

[0062] ​The main frame component 20 can be a box-shaped structure that houses multiple battery units 10, or a bar-shaped frame that connects multiple battery units 10 to each other to bundle them together.

[0063] In this embodiment, the main frame component 20 may include: a plurality of shafts extending through the battery cell support component 11; and a termination component fastened to both ends of the shafts to suppress movement of the battery cell. For example, the main frame component 20 in this embodiment may include fastening components such as bolts and nuts, but is not limited thereto.

[0064] The front cover 25 is a cover provided on one side of the battery module 1 which is connected to the main frame component 20, and can be formed of a heat-resistant metal material.

[0065] The front cover 25 can be configured to cover the entire side of the battery module 1.

[0066] Additionally, a connecting component such as a connector may be provided on the front cover 25 to connect the battery unit 10 to an external power source.

[0067] When multiple battery modules 1 are stacked, such as Figure 4 As shown, the front cover 25 can form one side of the energy storage system.

[0068] The cover component 30 is attached to the main frame component 20 or the battery cell support component 11 in a manner that covers one side of the electrode connector E of the secondary battery cell C. Therefore, the cover component 30 is positioned facing the electrode connector E to form the side of the battery module 1.

[0069] The cover component 30 is provided with a plurality of through holes 32. When a flame is generated in the secondary battery cell C, the through holes 32 serve as channels to discharge the flame or gas to the outside of the battery module. Therefore, the plurality of through holes 32 can be evenly arranged on the entire cover component 30.

[0070] When the cover component 30 does not have the through hole 32, the flame is difficult to be discharged to the outside of the battery module 1. In this case, the flame is easily transferred to other adjacent secondary battery cells.

[0071] To prevent the above situation, the cover member 30 of this embodiment is provided with a through hole 32, so that the flame can pass through the through hole 32 and form a flame toward the flame channel F1 side, which will be described later. In this way, the through hole 32 also has the function of guiding the flame to the flame channel F1.

[0072] Since the cover component 30 needs to withstand the flame continuously, it is made of a material that is not easily deformed by heat. Therefore, there are no particular restrictions on the material of the cover component 30; any material that is not easily melted or deformed by high-temperature heat can be used as the material of the cover component 30.

[0073] In the battery module 1 configured as described above, the housing member 12 covers the secondary battery cell C, and thus when a flame is generated in the secondary battery cell C, most of the flame is directed toward the direction in which the electrode tab E of the secondary battery cell C is disposed. Accordingly, the energy storage system according to the present embodiment is provided with a flame passage in the direction in which the electrode tab E is disposed.

[0074] Next, the energy storage system according to the embodiment of the present application will be described.

[0075] Figure 4 is a perspective view showing an energy storage system according to an embodiment of the present application, Figure 5 is a sectional view taken along Figure 4 line I-I' of FIG. 1, Figure 6 is a sectional view taken along Figure 4 line II-II' of FIG. 1.

[0076] and, Figure 7 is an enlarged view of P portion of Figure 6 Figure 8 is a sectional view taken along Figure 4 line III-III' of FIG. 1, Figure 9 is an enlarged sectional view of Q portion of Figure 6

[0077] Referring to the drawings, the energy storage system 100 of the present embodiment includes a module stack 2 in which a plurality of the above-described battery modules 1 are stacked, and includes a housing 150 for accommodating the module stack 2.

[0078] The housing 150 can include an upper cover 120 coupled to an upper portion of the module stack 2, a lower cover 130 coupled to a lower portion of the module stack 2, and side covers 110 provided to cover side surfaces of the module stack 2.

[0079] The plurality of battery modules 1 are stacked in a vertical direction and accommodated within the housing 150. At this time, the plurality of battery modules 1 are stacked such that all of the electrode tabs E are directed toward the same direction.

[0080] The battery module 1 of the present embodiment includes the secondary battery cell C in which the electrode tab E is disposed in two directions. Accordingly, the electrode tab E is disposed to be directed toward two directions opposite to each other.

[0081] Accordingly, the housing 150 includes first and third covers 110a and 110c disposed in a manner facing the side surfaces of the module stack 2 in which the electrode tab E is disposed, and a second cover 110b connecting the first and third covers 110a and 110c. Accordingly, the third cover 110c extends from the second cover 110b and is disposed at an opposite side surface of the first cover 110a.

[0082] ​​Here, the second cover 110b is provided in a form facing a side of the module stack 2 in which the electrode tab E is not provided. Therefore, in the present embodiment, the side cover 110 is formed as a whole in a "U" shape.

[0083] More specifically, the first cover 110a, the second cover 110b, and the third cover 110c that are the side cover 110 can be formed by bending one metal plate. For example, the first cover 110a and the third cover 110c that are provided side by side and the second cover 110b that connects the first cover 110a and the third cover 110c on one side can be formed by bending one metal plate into a "U" shape.

[0084] In the case where the side cover is configured as described above, in the portions where the first cover 110a and the second cover 110b are connected and where the second cover 110b and the third cover 110c are connected, a separate fastening member is not required to be further combined or a gap is not formed due to poor welding, and thus it is possible to prevent flames or gas from being discharged to the outside through the connected portions.

[0085] However, the configuration of the present application is not limited thereto.

[0086] Since the side cover is formed in a "U" shape, when the case 150 of the present embodiment is combined with the module stack 2, as shown in FIG. 2, one face of the module stack 2 is exposed to the outside of the case 150. Figure 4

[0087] As described above, the front cover 25 made of a metal material is provided at the exposed one face of the module stack 2. Therefore, the first cover 110a and the third cover 110c are combined to the front cover 25 of the module stack 2.

[0088] At this time, when a gap is formed in the portions where the first cover 110a and the third cover 110c are combined to the front cover 25, flames or smoke can flow out to the outside through the gap. Therefore, in order not to form the gap, the first cover 110a and the third cover 110c can be firmly combined to the front cover 25.

[0089] To this end, the first cover 110a and the third cover 110c can include a blocking wall 115 that contacts the module stack 2.

[0090] The blocking wall 115 can be formed in a form in which the first cover 110a and the third cover 110c are bent along the portions where the front cover 25 is combined to contact the module stack 2.

[0091] Therefore, the blocking wall 115 functions as a member for partitioning the flame passage F1, and due to the blocking wall 115, the flames of the flame passage F1 are not exposed to the front cover 25 side.

[0092] ​​​​The first cover 110a and the third cover 110c are disposed apart from the module stack 2 by a predetermined distance. To this end, as shown in FIG. 2, at least one spacer 180 can be provided at inner surfaces of the first cover 110a and the third cover 110c. Figure 5

[0093] The spacer 180 is disposed between the first cover 110a and the module stack 2 and between the third cover 110c and the module stack 2 to maintain the distance apart between the module stack 2 and the first cover 110a and the third cover 110c.

[0094] The spacer 180 can be formed by bending a metal plate, but is not limited thereto, and can be used by deforming various materials into various shapes, as long as it can separate the first cover 110a and the third cover 110c from the battery module 1 and can withstand a flame for a predetermined time.

[0095] In the present embodiment, since the first cover 110a and the third cover 110c are disposed apart from the module stack 2, a space formed between the case 150 and the module stack 2 serves as a passage F1 (hereinafter referred to as a flame passage) that guides a flame.

[0096] As described above, in the battery module 1 of the present embodiment, when a flame is generated in the secondary battery cell C, the flame is diffused only to the electrode tab E side. Although the diffusion of the flame is first blocked by the cover member 30, the flame diffused to the outside of the cover member 30 through the through hole 32 of the cover member 30 is diffused only to the flame passage F1 disposed between the first cover 110a and the third cover 110c and the module stack 2.

[0097] The flame diffused to the flame passage F1 is guided to the upper direction of the energy storage system 100 (the arrow direction in FIG. 2) through the flame passage F1. Accordingly, it is possible to prevent the flame from being diffused to other battery modules 1. Figure 6

[0098] On the other hand, in order to prevent the flame from being exposed to the outside of the energy storage system 100, at least one blocking member 170 can be provided in the flame passage F1.

[0099] In the present embodiment, the blocking member 170 is disposed at the uppermost end side of the flame passage F1, and the blocking member 170 is formed of a mesh net of a metal material. The mesh net is formed in the form of a very fine mesh filter to block the flame and allow only gas or smoke to pass through.

[0100] Accordingly, the flame diffused to the flame passage F1 is completely blocked from being diffused to the outside of the energy storage system 100 by the blocking member 170.

[0101] ​​On the other hand, an exhaust port 125 capable of venting gas or smoke can be provided in the upper cover 120 of the module stack 2. The exhaust port 125 is located at a position corresponding to the flame channel F1.

[0102] On the other hand, in the embodiment, the blocking component 170 is only provided at the uppermost side of the flame channel F1, but it is not limited thereto and can be additionally provided at various positions of the flame channel F1 as needed.

[0103] Furthermore, in this embodiment, the blocking component 170 is not limited to a screen, but can also be formed as a plate with multiple holes, configured as a multi-layered baffle. Thus, the blocking component 170 can be modified into various forms, as long as it can block the spread of flame while venting smoke and gas to the outside of the flame channel F1.

[0104] In addition, the energy storage system 100 of this embodiment includes cooling flow paths C1 and C2.

[0105] Cooling flow paths C1 and C2 consist of independent channels that are completely separate from the flame channel F1.

[0106] The cooling flow paths C1 and C2 in this embodiment include: a first cooling flow path C1, which is disposed between the housing 150 and the module stack 2; and a second cooling flow path C2, which is disposed inside the module stack 2, i.e. between the battery modules 1.

[0107] The first cooling flow path C1 is formed by the space between the second cover 110b and the module stack 2. Therefore, the second cover 110b and the module stack 2 are separated by a predetermined distance.

[0108] This embodiment illustrates a case where no gasket is provided between the second cover 110b and the module stack 2, but it is not limited to this. Depending on the size of the second cover 110b, a gasket may also be provided between the second cover 110b and the module stack 2.

[0109] like Figure 5 As shown, according to this embodiment, the housing 150 forms a partition 160 by partially bending the housing 150 to form a first cooling flow path C1.

[0110] The partition 160 is formed along the portion where the first cover 110a connects to the second cover 110b and the portion where the third cover 110c connects to the second cover 110b. The partition 160 is configured to contact the module stack 2 when the housing 150 is attached to the module stack 2.

[0111] Therefore, the partition 160 serves as a component for separating the first cooling flow path C1 and the flame channel F1, and because of the partition 160, the flame of the flame channel F1 will not spread to the first flow path C1 side.

[0112] Thus, when the partition 160 is formed by bending one metal plate, the first cooling flow path C1 and the flame passage F1 can be formed only from one metal plate without a separate component, so manufacturing is easy and manufacturing costs can be minimized.

[0113] The second cooling flow path C2 is formed by the space between the stacked battery modules 1. That is, as shown in FIG. 1, a space is formed between the two battery modules 1 in the energy storage system 100 of the present embodiment to serve as the second cooling flow path C2. Figure 8

[0114] To this end, as shown in FIG. 2, the battery module 1 is provided with a protruding portion 40 on its upper surface and an insertion portion 50 on its lower surface. Figure 9

[0115] By the protruding portion 40, each of the stacked battery modules 1 is disposed at a predetermined interval in the stacking direction, and the space between these battery modules 1 serves as the second cooling flow path C2.

[0116] In the present embodiment, the protruding portion 40 is linearly formed in a direction orthogonal to the length direction of the secondary battery cell C and protrudes upward from the upper surface of the battery module 1 by a predetermined distance. Also, the insertion portion 50 is formed in the form of a groove into which at least a portion of the protruding portion 40 is inserted when the battery modules 1 are stacked vertically. Thus, the insertion portion 50 is disposed at a position facing the protruding portion 40 when the battery modules 1 are stacked vertically.

[0117] Referring to FIG. 3, Figure 2 In the present embodiment, two protruding portions 40 are disposed side by side near the edges adjacent to the electrode tabs E in the upper surface of the battery module 1, respectively. Also, two insertion portions 50 are disposed side by side in the lower surface of the battery module 1 near the edges adjacent to the electrode tabs E, respectively.

[0118] Thus, the second cooling flow path C2 is formed by the space between the two protruding portions 40 or the two insertion portions 50 and is separate from the space in which the electrode tabs E of the secondary battery cell C are disposed.

[0119] One side of the second cooling flow path C2 is connected to the first cooling flow path C1. Also, the other side of the second cooling flow path C2 is connected to the outside of the energy storage system 100. Thus, air outside the energy storage system 100 enters the inside of the energy storage system 100 through the second cooling flow path C2 and moves to the upper or lower portion of the energy storage system 100 through the first cooling flow path C1 and is then discharged to the outside of the energy storage system 100. To efficiently cool, a cooling fan can be provided in the upper portion of the first cooling flow path C1.

[0120] ​​In this embodiment, the protrusion 40 and the insertion portion 50 are formed on the battery cell support member 11. However, this is not a limitation, and various modifications can be made, for example, setting them as separate components and then combining them with the battery module 1.

[0121] On the other hand, this embodiment illustrates a case where the protrusion 40 is provided on the upper surface of the battery module 1 and the insertion part 50 is provided on the lower surface of the battery module 1, but it is not limited to this and various modifications can be made. For example, the protrusion 40 is provided on the lower surface of the battery module 1 and the insertion part 50 is provided on the upper surface of the battery module 1.

[0122] Furthermore, the battery module 1 may only have the protrusion 40, while omitting the insertion part 50. In this case, other components that can neatly arrange the stacked battery modules 1 can be added.

[0123] In the energy storage system 100 of this embodiment constructed as described above, since the cooling flow paths C1 and C2 are completely separated from the flame channel F1, even if a fire occurs in the secondary battery cell C, the fire can be prevented from being transferred to other secondary battery cells C through the cooling flow paths C1 and C2.

[0124] In addition, a cover component 30 is provided on the electrode connector E side of battery module 1 to guide flame, gas and smoke to flame channel F1, thereby minimizing flame transfer to other secondary battery cells C.

[0125] In addition, a flame channel F1 and a blocking component 170 are provided to guide the flame to spread only through the flame channel F1 inside the housing in the event of a fire, and to prevent the flame from spreading to the outside of the housing 150 by the blocking component 170. Therefore, even if a fire occurs in any of the energy storage systems 100, the flame can be prevented from spreading to other energy storage systems 100.

[0126] In addition, since the flame or gas can be guided in the desired direction through the flame channel F1, it can be connected to gas supply / exhaust equipment and fire extinguishing equipment.

[0127] In addition, since the flame and gas can dissipate heat through the side cover 110 or the blocking component 170, the possibility of fire transfer caused by temperature can be minimized through this cooling effect.

[0128] In addition, due to having " The side cover of the "shape" is constructed to be firmly attached to the front cover of the battery module 1, thus preventing flame from flowing out from the front cover side and firmly maintaining the housing structure even in the event of an external impact.

[0129] The embodiments of the present application have been described above, but the scope of the right of the present application is not limited thereto, and it will be obvious to those skilled in the art that various modifications and changes can be made within the scope of the technical idea of the present application recited in the claims.

Claims

1. An energy storage system, comprising: The battery module includes multiple secondary battery cells and has electrode connectors on one or both sides; as well as The housing contains a module stack that houses multiple battery modules. The housing includes: The first cover is configured to face at least one of the sides of the module stack where the electrode connectors are located; and The second cover is configured to face at least one of the sides of the module stack that does not have the electrode connectors. A flame channel is formed in the space between the first cover and the module stack, and a cooling flow path is formed in the space between the second cover and the module stack. The cooling flow path is formed as an independent channel separate from the flame channel. The housing further includes: A partition, disposed along the portion where the first cover and the second cover connect, and configured to contact the module stack to separate the cooling flow path and the flame channel. The partition is formed by partially bending the shell.

2. The energy storage system according to claim 1, further comprising: A gasket is disposed between the first cover and the module stack to maintain a separation distance between the module stack and the first cover.

3. The energy storage system according to claim 1, wherein, The first cover and the second cover are formed by bending metal plates.

4. The energy storage system according to claim 1, further comprising: A blocking component is disposed within the flame channel to allow gas to pass through and block the flame.

5. The energy storage system according to claim 4, wherein, The blocking component is formed as a multi-layered screen or multi-layered baffle of metal material used for cooling the flame.

6. The energy storage system according to claim 1, further comprising: A second cooling flow path is formed between the stacked battery modules and connected to the cooling flow path.

7. The energy storage system according to claim 6, wherein, Each of the battery modules includes a protrusion that extends from its upper or lower surface. The second cooling flow route is formed by the space between the battery modules separated by the protrusion.

8. The energy storage system according to claim 7, wherein, The protrusion is disposed adjacent to the edge of the battery module and is disposed linearly along a direction orthogonal to the length direction of the secondary battery cell.

9. The energy storage system according to claim 1, wherein, The battery module includes: The battery unit accommodates multiple of the aforementioned secondary battery units; The main frame component integrates the multiple battery cells into one unit; and The cover component is attached to one or both sides of the electrode connector where the secondary battery unit is located. The cover component is disposed between the flame channel and the electrode connector, and is provided with multiple through holes for the flame or gas to pass through.

10. The energy storage system according to claim 9, wherein, The battery cell includes: Battery cell support member, which accommodates the secondary battery cell on its side; and The housing component covers the sides of the secondary battery cell and is attached to the battery cell support component.

11. The energy storage system according to claim 9, wherein, The housing further includes: The top cover is disposed on the upper part of the module stack; and The lower cover is located at the bottom of the module stack.

12. The energy storage system according to claim 1, wherein, The housing further includes: A third cover extends from the second cover and is disposed on the opposite side of the first cover.

13. The energy storage system according to claim 1, further comprising: The third cover is arranged side by side with the first cover, and is positioned to face the other side of the module stack where the electrode connector is located. The first cover and the third cover are formed to extend from the second cover, respectively.

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