Monomer module assembly, battery pack and energy storage system

Abstract

According to one embodiment of the present application, a single module assembly can include a battery cell stack in which a plurality of battery cells are stacked, and a barrier unit provided between at least one battery cell and at least another battery cell among the plurality of battery cells, wherein the barrier unit can include a plurality of support plates and a first buffer member interposed between adjacent support plates.

Description

Technical Field

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2024-0005424, filed on January 12, 2024, the disclosure of which is incorporated herein by reference in its entirety.

[0003] This disclosure relates to single-cell module assemblies, battery packs, and energy storage systems, and more specifically, to single-cell module assemblies, battery packs, and energy storage systems including a barrier unit for preventing heat transfer between battery cells in the event of a thermal event occurring in the battery cells. Background Technology

[0004] Currently commercially available rechargeable batteries include nickel-cadmium (NiCd), nickel-metal hydride (NiMH), nickel-zinc (NiZn), and lithium-ion batteries. Among these, lithium-ion batteries are the most popular because they are virtually unaffected by the memory effect. Therefore, compared to nickel-based batteries, they can be freely charged / discharged, have low self-discharge rates, and high energy density.

[0005] These types of lithium secondary batteries primarily use lithium-based oxides and carbon materials as the positive and negative electrode active materials, respectively. A lithium secondary battery includes: an electrode assembly, wherein positive and negative electrode plates, respectively coated with positive and negative electrode active materials, are separated by a separator; and a casing, i.e., a battery housing, which seals and houses the electrode assembly and the electrolyte.

[0006] Generally, based on the shape of the casing, lithium secondary batteries can be divided into can-type secondary batteries and pouch-type secondary batteries. In can-type secondary batteries, the electrode assembly is built into a metal can, while in pouch-type secondary batteries, the electrode assembly is built into a pouch made of aluminum laminate.

[0007] These types of secondary batteries are already widely used in medium and large-sized devices such as electric vehicles and energy storage systems (ESS), as well as in small devices such as portable electronic devices, and their use is rapidly increasing. Furthermore, in recent years, there has been a growing trend in the use of battery packs for energy storage purposes, not only in vehicles but also in residential applications.

[0008] There is a ongoing need for cell module components that can ensure stability even when thermal events occur in individual cells, as well as for battery packs that include such components. Summary of the Invention

[0009] Technical issues

[0010] Therefore, the purpose of this disclosure is to provide a cell module assembly, a battery pack, and an energy storage system including a barrier unit for preventing heat transfer between battery cells when a thermal event occurs in the battery cell.

[0011] In addition, the purpose of this disclosure is to provide a method for further enhancing the heat transfer prevention effect of barrier units included in single-cell module assemblies, battery packs and energy storage devices.

[0012] However, the technical objectives to be addressed by the embodiments of this disclosure are not limited to those described above, and those skilled in the art will understand from the following description other objectives not mentioned herein.

[0013] Technical solution

[0014] In an exemplary aspect of this disclosure, a single-cell module assembly is provided, comprising: a battery cell stack in which a plurality of battery cells are stacked; and a barrier unit disposed between at least one of the plurality of battery cells and at least another battery cell, wherein the barrier unit includes a plurality of support plates and a first buffer member inserted between adjacent support plates.

[0015] The support plate has a plate shape and can be made of a rigid and fire-resistant material, and the first buffer member has a plate shape and can be made of a compressible material.

[0016] The support plate may be a metal plate, and the first buffer member may be a silicone resin pad.

[0017] When a thermal event occurs in a battery cell, the support plate can prevent heat transfer to adjacent battery cells, and when a battery cell expands, the first buffer member can be compressible between the support plates due to the pressure applied to the barrier unit.

[0018] The support plates can be formed as a pair, and the first buffer member can be inserted between the pair of support plates.

[0019] The barrier unit further includes a pair of second buffer members, and the pair of second buffer members can be respectively disposed on the outermost side of the barrier unit.

[0020] The second buffer member has a plate shape and can be made of a compressible material.

[0021] The second buffer component can be a silicone pad.

[0022] When a battery cell expands, the second buffer member can be compressed and deformed according to the outer surface of the expanded battery cell.

[0023] The barrier unit can be composed of a second buffer component, a support plate, a first buffer component, a support plate, and a second buffer component in sequence.

[0024] The first buffer member and the second buffer member may be made of the same material.

[0025] At least one protrusion may be provided at the lower end of the support plate.

[0026] The thickness of the plurality of support plates can be equal to that of each other.

[0027] The single-unit module assembly may further include: a pair of busbar housings, the pair of busbar housings including openings through which electrode leads of the battery cell pass, and the pair of busbar housings being disposed on two side surfaces of the battery cell stack; and a pair of end plates, the pair of end plates being respectively connected to the two ends of the pair of busbar housings.

[0028] In another exemplary aspect of this disclosure, a battery pack is provided, comprising: a single-unit module assembly according to the above embodiments; an electrical unit including a BMS disposed on one surface of the single-unit module assembly; and a housing that accommodates the single-unit module assembly and the electrical unit.

[0029] In yet another exemplary aspect of this disclosure, an energy storage system including a battery pack according to the above embodiments is provided.

[0030] Beneficial effects

[0031] According to specific embodiments of this disclosure, even if a thermal event occurs inside the battery pack, i.e., if a problem such as thermal runaway or fire occurs in some battery cells, such a problem can be effectively prevented from spreading to other battery cells.

[0032] Furthermore, it can more effectively enhance the heat transfer prevention effect of barrier units, including those in individual module components, battery packs, and energy storage systems.

[0033] Furthermore, according to embodiments of this disclosure, single-cell module assemblies, battery packs, and energy storage systems can be provided, which have a simple structure and enhanced stability when thermal events occur in the battery cells.

[0034] Furthermore, various additional effects can be achieved through the various embodiments of this disclosure. The various effects of this disclosure will be described in detail in each embodiment, or descriptions of effects that are readily understood by those skilled in the art will be omitted. Attached Figure Description

[0035] Figure 1 This is a perspective view of a single module assembly including a blocking unit according to an embodiment of the present disclosure.

[0036] Figure 2 It is shown Figure 1 An exploded 3D diagram showing the state in which the blocking units are separated.

[0037] Figure 3 It only shows those included Figure 1 A three-dimensional view of the barrier unit in a single modular component.

[0038] Figure 4 yes Figure 3 An exploded three-dimensional view of the barrier unit.

[0039] Figure 5 yes Figure 3 A top view of the barrier unit.

[0040] Figure 6 yes Figure 3 Reference diagram of the barrier unit.

[0041] Figure 7 It shows Figures 1 to 6 The individual module components and electrical units are housed in a housing to form a battery pack.

[0042] Figure 8 Assembly is shown Figure 7 The battery pack is composed of various components. Detailed Implementation

[0043] In the following, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, enabling those skilled in the art to readily implement them. The present disclosure can be modified in various different ways and is not limited to the embodiments set forth herein.

[0044] In order to clearly describe this disclosure, descriptions of parts unrelated to this disclosure will be omitted, and throughout the specification, the same reference numerals denote the same or similar constituent elements.

[0045] Furthermore, in the accompanying drawings, for ease of description, the dimensions and thicknesses of each structure are arbitrarily shown, and this disclosure is not necessarily limited to the dimensions and thicknesses shown in the drawings. In the accompanying drawings, the thicknesses of layers, regions, etc., are exaggerated for clarity. In the accompanying drawings, the thicknesses of portions and regions are exaggerated for ease of description.

[0046] Furthermore, it should be understood that when an element such as a layer, membrane, region, or plate is referred to as being "on" or "above" another element, it can be directly on the other element, or there may be intermediate elements present. Conversely, when an element is referred to as being "directly on" another element, this indicates that there are no other intermediate elements present. Additionally, the statement that a particular part is "above" or "on" a reference part means that the particular part is located above or below the reference part, and does not necessarily mean that the particular part must be "above" or "on" in the opposite direction of gravity.

[0047] Furthermore, throughout the specification, when a section is referred to as “including” or “contains” a particular component, unless otherwise stated, it means that the section may also include other components, without excluding other components.

[0048] Furthermore, throughout the instruction manual, when referred to as a "plane," it means the view of the target portion from above; when referred to as a "cross section," it means the view of the target portion from the side of a vertically cut cross section.

[0049] Embodiments of this disclosure will now be described with reference to the accompanying drawings.

[0050] Figure 1 This is a perspective view of a single-unit module assembly 100 including a blocking unit according to an embodiment of the present disclosure. Figure 2 It is shown Figure 1 An exploded 3D diagram showing the state in which the blocking units are separated.

[0051] Reference Figure 1 and Figure 2 Multiple battery cells 110 are arranged to form a battery cell stack. The cell module assembly 100 includes a battery cell stack, an end plate 120, and a busbar housing assembly 130. Furthermore, the cell module assembly 100 according to embodiments of the present disclosure includes a barrier unit 200. The barrier unit 200 will be described in more detail below.

[0052] First, a pair of end plates 120 are respectively disposed on the outermost side of the battery cell stack. The end plates 120 are arranged parallel to the battery cells 110. Furthermore, a pair of busbar housing assemblies 130 are disposed on the surface facing the electrode leads 111 of each battery cell 110 in the battery cell stack. Figure 1 In this embodiment, a pair of busbar housing assemblies 130 are disposed on two side surfaces of a plurality of battery cell stacks. Each busbar housing assembly 130 is disposed in a direction orthogonal to the longitudinal direction of the battery cell 110. Furthermore, a pair of end plates 120 are respectively disposed on the front and rear surfaces of the battery cell stack. The two ends of each of the pair of busbar housing assemblies 130 are connected by the pair of end plates 120.

[0053] For example, the end plate 120 can be made of a metal material, such as aluminum, iron, or stainless steel. The busbar housing assembly 130 includes a busbar housing 310, busbar electrodes 320, and an ICB (internal connector board) 330 disposed in the busbar housing 310, and the busbar housing 310 can be made of, for example, a plastic material and can be manufactured by injection molding.

[0054] A pair of busbar housing assemblies 130 are disposed on two side surfaces of a plurality of battery cells stacked together. The busbar housing assembly 130 includes a busbar housing 310, a plurality of busbar electrodes 320 disposed on the busbar housing 310, and an ICB 330.

[0055] Busbar electrodes 320 are disposed on the outer surface of the busbar housing 310, and a plurality of openings are provided near the location where the busbar electrodes 320 are disposed. Electrode leads 111 of the battery cells 110 pass through the openings in the busbar housing assembly 130 and connect to the busbar electrodes 320. For reference, in the accompanying drawings of this disclosure, the electrode leads 111 of adjacent battery cells 110 are connected to each other by passing through openings formed in the busbar housing 310, and the busbar electrodes 320 are attached thereto.

[0056] Additionally, the ICB 330 is disposed on the outer surface of the busbar housing 310. In embodiments of this disclosure, the ICB 330 is disposed on the upper part of the busbar electrode 320.

[0057] The ICB 330 transmits sensing data between the battery cell 110 and the BMS 410. The ICB 330 is a substrate equipped with at least one element for transmitting sensing data and includes a printed circuit board (PCB) 331 having circuit patterns formed on an insulating layer and a sensing cable connector 332 to which a sensing cable 340 is connected. The ICB 330 senses the current and / or voltage in the battery cell 110 and transmits the sensed data to the BMS 410 via the sensing cable 340. Furthermore, the BMS 410 transmits data for maintaining and managing the battery cell 110 to the ICB 330 via the sensing cable 340 and ultimately controls the battery cell 110 electrically connected to the ICB 330.

[0058] Each of the upper and lower sides between the pair of end plates 120 may include at least one strap 140 for connecting the pair of end plates 120. The strap 140 reinforces the fastening of the cell module assembly 100. More specifically, it reinforces the fastening of the pair of end plates 120 and the plurality of cell stacks disposed between them with the barrier unit 200. This prevents deformation of the alignment of the plurality of cell stacks. It also prevents deformation of the alignment of the barrier unit 200 disposed between the plurality of cell stacks.

[0059] The barrier unit 200 is configured to make large-area contact with the battery cell 110 and is disposed between adjacent battery cells 110. The barrier unit 200 may be disposed parallel to the battery cells 110. For reference, a buffer member such as a silicone pad (not shown) may be disposed between the outermost battery cell 110 of the battery cell stack and the end plate 120. In some cases, the barrier unit 200 may also be disposed between the outermost battery cell 110 of the battery cell stack and the end plate 120. The barrier unit 200 can block the propagation of flame or spark emitted from a battery cell 110 where a thermal event has occurred to adjacent battery cells 110, thereby preventing thermal runaway between cells. The barrier unit 200 may be disposed between multiple battery cells 110. Figure 1 and Figure 2 The embodiments shown illustrate a configuration where one barrier unit 200 is provided for every six battery cells 110. This disclosure is not limited to those shown in the figures, and various modifications and variations can be made to the embodiments.

[0060] Figure 3 It only shows those included Figure 1 A three-dimensional view of the barrier unit in a single modular component. Figure 4 yes Figure 3 An exploded three-dimensional view of the barrier unit. Figure 5 yes Figure 3 A top view of the barrier unit. Figure 6 yes Figure 3 Reference diagram of the barrier unit.

[0061] First, as described above, depending on the size of the battery cell stack and the number of battery cells 110, multiple barrier units 200 may be included. Furthermore, the barrier units 200 may be stacked together with the battery cells 110 to form a cell module assembly 100.

[0062] Reference Figures 3 to 5 According to an embodiment of the present disclosure, the barrier unit 200 includes at least two support plates 210 and a first buffer member 220 inserted between adjacent support plates 210. Additionally, the barrier unit 200 may also include a pair of second buffer members 230 disposed on the outermost side of the barrier unit 200.

[0063] First, according to the barrier unit 200 of this disclosure, at least two support plates 210 are provided, with adjacent support plates spaced apart by a first buffer member 220 inserted between them. Each of the support plates 210 and the first buffer member 220 may have a plate shape. Each of the second buffer members 230 may also have a plate shape.

[0064] The support plate 210 is made of a rigid and fire-resistant material. When a thermal event occurs in the battery cell 110, the support plate 210 prevents the transfer of heat to adjacent battery cells 110 or the propagation of flames, sparks, etc., while maintaining the structure and rigidity of the barrier unit 200 even at high temperatures, thereby preventing deformation of the barrier unit 200.

[0065] At least one protrusion 211 may also be provided at the lower end of the support plate 210. This results in a structure in which the battery cell stack, composed of battery cells 110 and barrier units 200, is supported from below by the protrusion 211 of the support plate 210 of the barrier unit 200. Since the bottom surface of the battery cell stack is supported by the protrusion 211, the battery cell stack can be prevented from sagging downwards. More specifically, as the size and weight of the battery cell stack increase, the center of the battery cell stack may sag downwards (there is a risk that the battery cell stack may bend downwards as a whole). However, according to this disclosure, the protrusion 211 is provided at the lower end of the support plate 210 of the barrier unit 200, so that the bottom surface of the battery cell stack is supported upwards, and thus the battery cell stack can remain flat as a whole. When multiple barrier units 200 are provided in the battery cell stack, multiple protrusions 211 are also provided, thereby forming a structure in which the bottom surface of the battery cell stack is uniformly supported by multiple protrusions 211 to distribute and support the weight of the battery cell stack. Of course, when the support plate 210 of the barrier unit 200 is provided with a plurality of protrusions 211, and preferably, when the plurality of protrusions 211 are arranged in a symmetrical structure, the bottom surface of the battery cell stack will also be uniformly supported by the plurality of protrusions 211, thereby forming a structure in which the bottom surface of the battery cell stack is uniformly supported by the plurality of protrusions 211. However, this disclosure is not limited to those shown in the figures, and various modifications and variations can be made to the embodiments.

[0066] For example, the support plate 210 can be made of a metallic material, a plastic material, or a combination thereof. For example, the metallic material can be aluminum, iron, stainless steel, or a combination thereof. It is sufficient if the support plate 210 is made of a material that is rigid and structurally undeformable even in high-temperature environments such as thermal events of the battery cell 110, and the support plate 210 can be selected according to the environment in which this disclosure is implemented.

[0067] The first buffer member 220, inserted between adjacent support plates 210, can be made of silicone resin, plastic, or a combination thereof. The first buffer member 220 has suitable elasticity and can be compressed when the battery cell 110 expands, thereby absorbing the pressure applied to the barrier unit 200. In the case of a plastic material, for example, it can be made of flexible plastic. When the battery cell 110 expands, the expanded battery cell 110 compresses the barrier unit 200, at which time the first buffer member 220 can act as a buffer.

[0068] Similarly, the pair of second buffer members 230 disposed on the outermost side of the barrier unit 200 can also be made of silicone resin, plastic, or a combination thereof. The second buffer members 230 have suitable elasticity and can be compressed and deformed corresponding to the outer surface of the expanded battery cell 110 when the battery cell 110 expands. That is, the second buffer members can deform and compress concavely corresponding to the convex surface of the expanded battery cell 110, thereby absorbing the pressure applied to the barrier unit 200. In the case of plastic materials, for example, it can be made of flexible plastic. When the battery cell 110 expands, the expanded battery cell 110 compresses the barrier unit 200, at which time the first buffer member 220 can act as a buffer.

[0069] The first cushioning member 220 and the second cushioning member 230 may be made of the same material, or alternatively, they may be made of different materials. If both the first cushioning member 220 and the second cushioning member 230 are made of the same material, then both the first cushioning member 220 and the second cushioning member 230 may be made of, for example, a silicone pad.

[0070] The support plate 210 and the first buffer member 220, as well as the support plate 210 and the second buffer member 230, can be bonded together with adhesive.

[0071] Figure 3 The embodiment shows a barrier unit 200 comprising two support plates 210 and a second buffer member 230 inserted between the two support plates 210. Additionally, this embodiment shows a barrier unit 200 comprising a second buffer member 230 on each of its two outermost sides.

[0072] In more detail, Figure 3 The embodiment shows a case where the barrier unit 200 has a five-layer structure of second buffer member 230-support plate 210-first buffer member 220-support plate 210-second buffer member 230.

[0073] Figure 6 yes Figure 3 A reference diagram of the barrier unit, in which Figure 6 (a) shows a schematic diagram of the support plate of the barrier unit of this disclosure, and Figure 6 (b) shows a schematic diagram of the support plate of the barrier unit in the prior art as a comparative example.

[0074] In the prior art, the barrier unit 200 typically has a single support plate 210. However, in embodiments of this disclosure, the barrier unit 200 is configured such that a plurality of support plates 210 are spaced apart from each other, and a first buffer member 220 is inserted between the support plates 210.

[0075] In contrast to the case where the barrier unit in the prior art includes a support plate (see...) Figure 6 Compared to (b), in the case where the barrier unit 200 of this disclosure includes n (e.g., two) support plates 210, the thickness of each support plate 210 is 1 / n (e.g., 1 / 2) the thickness of a support plate in the prior art, and the first buffer member 220 is inserted between the support plates 210, the heat barrier effect (or heat transfer prevention effect) is further enhanced (see [reference]). Figure 6 (a) Since the first buffer member 220 is inserted between adjacent support plates 210, heat transfer from one support plate 210 to another can be prevented more effectively.

[0076] More specifically, assuming the same amount of material is used to form the support plates in this disclosure and the prior art, this disclosure, which includes n support plates 210, each support plate 210 having a thickness of 1 / n, has a better thermal barrier effect (heat transfer prevention effect) than the prior art which includes a single support plate having a thickness of one.

[0077] On the other hand, for example, the thickness of the plurality of support plates 210 can be equal to that of each other. Similarly, when a plurality of first buffer members 220 are provided, the thickness of the first buffer members 220 can be equal to that of each other. Similarly, the thickness of the pair of second buffer members 230 provided on the outermost sides can be equal to that of each other. The thicknesses of the first buffer members 220 and the second buffer members 230 can also be equal to that of each other. However, this disclosure is not limited thereto, and the dimensions can be modified and changed in various ways depending on the environment in which this disclosure is implemented.

[0078] The length of the support plate 210 may be equal to or greater than the length of the first buffer member 220 and / or the second buffer member 230. Therefore, as described above, the overall structure of the monolithic module assembly 100 can be maintained even during welding pressure application or under external physical impact during normal operation. The length of the support plate 210 may be equal to or greater than the length of the first buffer member 220 and / or the second buffer member 230. However, this disclosure is not limited to this and the dimensions can be modified and changed in various ways depending on the environment in which this disclosure is implemented.

[0079] The height of the support plate 210 may be equal to or greater than the height of each of the first buffer member 220 and / or the second buffer member 230. However, this disclosure is not limited thereto, and the dimensions may be changed and modified in various ways depending on the environment in which this disclosure is implemented.

[0080] Refer again Figure 1 The electrical unit 400 will be briefly described below. The electrical unit 400 is disposed on one surface of the monolithic module assembly 100 (on...). Figure 1 In one embodiment, it is the front surface of the monolithic module assembly 100. Figure 1 The example illustrates an electrical unit 400 disposed on the outer surface of an end plate 120, which is disposed on the front surface of a single-unit module assembly 100. The electrical unit 400 includes a battery management system (BMS) 410, an electrical unit housing 420 housing each component of the electrical unit 400 (such as the BMS 410, power cable 430, etc.), and the power cable 430. The BMS 410 includes connector terminals 411 for electrical connection to a sensing cable 340. The electrical unit 400 may include various components for controlling or managing the charging and discharging of the battery pack, such as relays, fuses, and current sensors. Each component of the electrical unit 400 can be implemented using an electrical unit disposed in a typical battery pack; therefore, a further detailed description of the electrical unit 400 will be omitted.

[0081] Figure 7 It shows Figures 1 to 6 The individual module components and electrical units are housed in a housing to form a battery pack. Figure 8 Assembly shown Figure 7 The battery pack is composed of various components.

[0082] Battery pack 10 includes the above reference Figures 1 to 6 The individual module assembly 100 and electrical unit 400 are described, and the individual module assembly 100 and electrical unit 400 are housed within a housing 500. A battery pack 10 according to an embodiment of this disclosure includes a barrier unit 200, as referred to above. Figures 1 to 6 As stated above.

[0083] The housing 500 includes a lower housing member 510 and an upper housing member 520. The lower housing member 510 and the upper housing member 520 are connected to surround the outer side of the monolithic module assembly 100. For example, the lower housing member 510 may have a generally flat shape. For example, the upper housing member 520 may have a U-shaped frame shape. This can be a structure in which the monolithic module assembly 100 is mounted on the flat-shaped lower housing member 510 and the upper housing member 520 covers the monolithic module assembly 100.

[0084] However, this disclosure is not limited to those mentioned above, and various modifications and changes can be made, such as both the lower shell component 510 and the upper shell component 520 being L-shaped frames or roll-formed integral frames.

[0085] In addition, the battery pack housing 500 also includes a front cover 530 disposed on the front surface of the individual module assembly 100 and the electrical unit 400.

[0086] An insulating sheet (not shown) with electrical insulating properties is disposed between the single-unit module assembly 100 and the lower housing member 510. An insulating sheet (not shown) with electrical insulating properties is disposed between the single-unit module assembly 100 and the upper housing member 520. For example, the insulating sheet may be a film made of PC (polycarbonate), PET, PP, or a combination thereof.

[0087] In addition, the energy storage system (ESS) according to this disclosure includes one or more of the battery packs described above according to this disclosure. Furthermore, in addition to such battery packs, the energy storage system according to this disclosure may also include the general components included in an energy storage system.

[0088] Although preferred embodiments of the present disclosure have been shown and described above, the scope of the disclosure is not limited thereto, and those skilled in the art can make many other variations and modifications to the embodiments using the basic principles of the invention as defined in the appended claims, which also fall within the spirit and scope of the invention.

[0089] [Explanation of reference numerals in the attached figures]

[0090] 10: Battery Pack

[0091] 100: Monolithic module component

[0092] 110: Battery cell

[0093] 111: Electrode lead

[0094] 120: End plate

[0095] 130: Busbar housing assembly

[0096] 140: with

[0097] 200: Barrier Unit

[0098] 210: Support plate

[0099] 220: First buffer component

[0100] 230: Second buffer component

[0101] 310: Busbar housing

[0102] 320: Busbar Electrode

[0103] 330: ICB

[0104] 331: Printed Circuit Board

[0105] 332: Sensing cable connector

[0106] 340: Sensing cable

[0107] 400: Electrical Unit

[0108] 410: BMS

[0109] 420: Electrical unit housing

[0110] 430: Power cables

[0111] 500: Housing assembly

[0112] 510: Lower shell component

[0113] 520: Upper shell component

[0114] 530: Front Cover

Claims

1. A single-module component, comprising: A battery cell stack, in which multiple battery cells are stacked; as well as A barrier unit is disposed between at least one battery cell and at least another battery cell in the plurality of battery cells. The barrier unit includes multiple support plates and a first buffer member inserted between adjacent support plates.

2. The single-module component according to claim 1, in, The support plate has a plate shape and is made of a rigid and fire-resistant material. The first buffer member has a plate shape and is made of a compressible material.

3. The single-module component according to claim 2, in, The support plate is a metal plate, and The first buffer component is a silicone resin pad.

4. The single-module component according to claim 1, in, When a thermal event occurs in the battery cell, the support plate prevents heat transfer to adjacent battery cells, and When the battery cell expands, the first buffer member is able to compress between the support plates due to the pressure applied to the barrier unit.

5. The single-module component according to claim 1, in, The support plates are formed as a pair, and The first buffer member is inserted between the pair of support plates.

6. The single-module component according to claim 1, in, The barrier unit further includes a pair of second buffer members, and the pair of second buffer members are respectively disposed on the outermost side of the barrier unit.

7. The single-module component according to claim 6, in, The second buffer member has a plate shape and is made of a compressible material.

8. The single-module component according to claim 7, in, The second buffer component is a silicone resin pad.

9. The single-module component according to claim 6, in, When the battery cell expands, the second buffer member can be compressed and deformed in accordance with the outer surface of the expanded battery cell.

10. The monolithic module component according to claim 6, The barrier unit is composed of the second buffer component, the support plate, the first buffer component, the support plate, and the second buffer component in sequence.

11. The monolithic module component according to claim 6, in, The first buffer member and the second buffer member are made of the same material.

12. The single-module component according to claim 1, in, At least one protrusion is provided at the lower end of the support plate.

13. The single-module component according to claim 1, in, The thickness of the plurality of support plates is equal to that of each other.

14. The single-module component according to claim 1, further comprising: A pair of busbar housings, the pair of busbar housings including openings through which the electrode leads of the battery cells pass, and the pair of busbar housings being disposed on two side surfaces of the battery cell stack; and A pair of end plates, which are respectively connected to the two ends of the pair of busbar housings.

15. A battery pack, comprising: The single-unit module component according to claim 1; An electrical unit, the electrical unit including a BMS disposed on one surface of the monolithic module assembly; as well as A housing that houses the individual module assembly and the electrical unit.

16. An energy storage system comprising a battery pack according to claim 15.

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