Battery module, and battery pack and vehicle including same

Abstract

The present invention relates to a battery module comprising: a plurality of battery cells; a module case configured to accommodate the plurality of battery cells and having a first vent hole configured to be formed on one side surface of the module case to discharge exhaust gas generated from the battery cells to the outside; and a compression member disposed between the plurality of battery cells and one side surface of the module case to block fluid movement between at least two battery cells.

Description

Technical Field

[0001] This disclosure relates to battery modules, battery packs including such battery modules, and vehicles. Specifically, this disclosure relates to battery modules capable of suppressing heat transfer within the battery module, battery packs including such battery modules, and vehicles.

[0002] This application is based on and claims priority to Korean Patent Application No. 10-2024-0059300, filed with the Korean Intellectual Property Office on May 3, 2024, the disclosure of which is incorporated herein by reference in its entirety. Background Technology

[0003] Secondary batteries, with their high applicability across product categories and electrical characteristics such as high energy density, are widely used not only in portable devices but also in electric vehicles (EVs) or hybrid electric vehicles (HEVs) powered by electric power sources. Such secondary batteries are gaining attention not only for their major advantage of significantly reducing fossil fuel use but also because they produce no byproducts during energy use, making them a promising new energy source for enhancing environmental sustainability and energy efficiency.

[0004] Currently widely used rechargeable batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. When a high output voltage is required, multiple battery cells can be connected in series to form a battery module or battery pack. Alternatively, to increase charging / discharging capacity, multiple battery cells can be connected in parallel to configure a battery module or battery pack. Therefore, the number of battery cells included in a battery module or battery pack can be configured differently depending on the required output voltage or charging / discharging capacity.

[0005] Furthermore, because battery cells involve chemical reactions during charging and discharging, their performance may degrade when used in environments exceeding suitable temperatures. Additionally, if thermal control is not properly maintained at appropriate temperatures, there remains a potential risk of accidental fire or explosion. Moreover, the battery modules are configured such that the battery cells are densely housed within the module casing. Therefore, if a thermal event occurs in any one battery cell, the high-temperature gases and flames emitted from it could propagate to adjacent battery cells, potentially leading to a chain reaction that could cause a battery cell explosion, posing a significant safety risk.

[0006] Specifically, in conventional battery modules, high-temperature gases or flames are expelled towards the top of the battery cells and move to adjacent cells through the empty space formed between the battery cells and the top plate. Therefore, there is a problem of further accelerating heat propagation within the battery module.

[0007] Therefore, there is a need to develop a structure that can suppress and delay heat propagation so that even if a thermal event occurs in some of the battery cells within the battery module, it can prevent high-temperature gas or flame from spreading to other battery cells within the battery module and causing thermal runaway. Summary of the Invention

[0008] Technical issues

[0009] This disclosure was designed to address the problems in the related technologies, and therefore aims to provide a battery module that can effectively prevent or delay the propagation of thermal runaway between battery cells by blocking the path of high-temperature gas or flame to adjacent battery cells.

[0010] This disclosure also provides a battery pack and a vehicle that include such a battery module.

[0011] However, the technical problems that this disclosure seeks to solve are not limited to those described above, and those skilled in the art will clearly understand from the description of the invention below that there are other problems not mentioned above.

[0012] Technical solution

[0013] In one aspect of this disclosure, a battery module is provided, comprising: a plurality of battery cells; a module housing configured to accommodate the plurality of battery cells and having a first vent formed on one side of the module housing to discharge exhaust gases generated from the battery cells to the outside; and a compression member configured to block fluid movement between at least two battery cells between the plurality of battery cells and one side of the module housing.

[0014] The compression component can be configured to fill the space between the battery cell and the module housing.

[0015] The compression member can be configured as a sheet shape.

[0016] The compression member can be configured to make close contact with the upper end of the battery cell.

[0017] The compression member can be configured to be partially inserted into the first exhaust port.

[0018] The compression member may have a second vent hole formed at a position corresponding to the first vent hole.

[0019] The compression member may include a connecting portion that protrudes outward from the outer peripheral surface of the second exhaust port and is configured to be inserted into the first exhaust port.

[0020] The battery module may also include a blocking member disposed between the battery cells and configured to separate the multiple battery cells, and a compression member may be configured such that the end of the blocking member contacts the compression member.

[0021] The compression member can be configured such that the end of the blocking member is inserted into the compression member.

[0022] The battery module may also include a cover member configured to cover one side of the module housing from the outside.

[0023] The cover member may have a recess that is located at a position corresponding to the first vent hole.

[0024] In another aspect of this disclosure, a battery pack including a battery module according to this disclosure is provided.

[0025] In one aspect of this disclosure, a vehicle including a battery module according to this disclosure is provided.

[0026] Beneficial effects

[0027] According to one aspect of this disclosure, a compression member disposed in the empty space between the battery cell and the module housing can be used to block the movement of fluids such as flames, particles and high-temperature gases between the battery cells.

[0028] In other words, according to the above aspects of this disclosure, even if a thermal event occurs in some battery cells within the battery module, it can effectively prevent or delay the spread of gas or flame to other battery cells in the battery module and prevent thermal runaway. Therefore, the safety and reliability of the battery module can be ensured.

[0029] In addition, according to another aspect of this disclosure, since the high-temperature gas or flame generated in the battery cells inside the battery module can be smoothly discharged to the outside of the battery module, the propagation of the internal pressure increase of the battery module leading to thermal runaway can be prevented or delayed.

[0030] Furthermore, according to another aspect of this disclosure, since the compression member is configured to connect to the vent hole of the module housing, deformation or damage to the compression member can be prevented even in the event of thermal runaway in the battery module. Therefore, the structural stability of the battery module can be ensured.

[0031] In addition, according to another aspect of this disclosure, events (such as fire or explosion) caused by thermal runaway of a battery pack including multiple battery modules or a device equipped with multiple battery modules can be prevented or delayed.

[0032] In addition, this disclosure may have various other effects, and these effects will be described in the corresponding embodiments, or descriptions of effects that can be easily deduced by those skilled in the art will be omitted. Attached Figure Description

[0033] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the foregoing disclosure, serve to provide a further understanding of the technical features of the present disclosure; therefore, the present disclosure is not to be construed as limited to the drawings.

[0034] Figure 1 This is an overall perspective view of a battery module according to an embodiment of the present disclosure.

[0035] Figure 2 This is an exploded perspective view of a battery module according to an embodiment of the present disclosure.

[0036] Figure 3 This is a perspective view of the battery cells included in a battery module according to an embodiment of the present disclosure.

[0037] Figure 4 This is a cross-sectional view of a battery module according to an embodiment of the present disclosure, which may be, for example, along... Figure 1 The cross-sectional view taken from line I-I' in the diagram.

[0038] Figure 5 yes Figure 4 The enlarged view of part A illustrates the structure of a compression member included in a battery module according to an embodiment of the present disclosure.

[0039] Figure 6 This is a bottom perspective view of a compression member included in a battery module according to an embodiment of the present disclosure.

[0040] Figure 7 This is a top perspective view of a compression member included in a battery module according to an embodiment of the present disclosure.

[0041] Figure 8 This is an enlarged perspective view of a battery module according to an embodiment of the present disclosure.

[0042] Figure 9 This is a cross-sectional view of a battery module according to an embodiment of the present disclosure, which may be, for example, along... Figure 1 The cross-sectional view taken from line II-II' in the diagram.

[0043] Figure 10 This is an exploded cross-sectional view illustrating some components of a battery module according to an embodiment of the present disclosure.

[0044] Figure 11 This is a diagram illustrating a cover member included in a battery module according to another embodiment of the present disclosure.

[0045] Figure 12 This is a cross-sectional view of a battery module according to another embodiment of the present disclosure.

[0046] Figure 13 This is a diagram illustrating the opening of the cover member when a thermal event occurs in the battery module, according to another embodiment of the present disclosure.

[0047] Figure 14 This is a schematic perspective view of a battery pack including a battery module according to an embodiment of the present disclosure.

[0048] Figure 15 This is a schematic perspective view of a vehicle including a battery pack according to an embodiment of the present disclosure. Detailed Implementation

[0049] Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Before the description, it should be understood that the terminology used in the specification and appended claims should not be construed as limited to its general and dictionary meanings, but rather interpreted based on the meanings and concepts corresponding to the technical aspects of the present disclosure, on the basis of allowing the inventors to appropriately define the terminology for the best interpretation.

[0050] Therefore, the descriptions presented herein are merely preferred examples for illustrative purposes only and do not represent the full scope of this disclosure. It should be understood that other equivalents and modifications may be made thereto without departing from the scope of this disclosure.

[0051] Furthermore, this disclosure may include various embodiments. Redundant descriptions of substantially the same or similar configurations will be omitted from the various embodiments, and descriptions will be based on the differences between them.

[0052] Furthermore, although terms indicating directions such as up, down, left, right, front, and back are used in this specification, it will be apparent to those skilled in the art to which this disclosure pertains that these terms are merely for ease of interpretation with reference to the accompanying drawings and may vary depending on the position of the object or the observer.

[0053] For example, in the embodiments of this disclosure, the X-axis direction shown in the figure can indicate the left-right direction, the Y-axis direction can indicate the front-back direction perpendicular to the X-axis direction on the horizontal plane (XY plane), and the Z-axis direction can indicate the up-down direction (vertical direction) perpendicular to both the X-axis and Y-axis directions, that is, the height direction of the battery cell.

[0054] Figure 1 This is an overall perspective view of a battery module according to an embodiment of the present disclosure, and Figure 2 This is an exploded perspective view of a battery module according to an embodiment of the present disclosure. Figure 3 This is a perspective view of the battery cells included in a battery module according to an embodiment of the present disclosure. Additionally, Figure 4 This is a cross-sectional view of a battery module according to an embodiment of the present disclosure, which may be, for example, along... Figure 1 The cross-sectional view taken from line I-I' in the diagram.

[0055] Reference Figures 1 to 4 According to embodiments of the present disclosure, the battery module 10 may include a battery cell 100, a module housing 200, and a compression member 300.

[0056] Multiple battery cells 100 can be configured. These multiple battery cells 100 can be stacked in one direction. For example, as shown... Figure 2 As shown, multiple battery cells 100 can be stacked along the left-right direction (X-axis direction).

[0057] like Figure 3 In the illustrated embodiment, the battery cell 100 may be a pouch-type secondary battery. The battery cell 100 may include an electrode assembly and a cell housing 110 that houses the electrode assembly. The cell housing 110 may house the electrode assembly in a housing portion 111, and the edges of the housing portion 111 may be thermally welded to form a sealing portion 112. The sealing portion 112 may be provided on three of the four edges of the battery cell 100.

[0058] Additionally, each of the plurality of battery cells 100 may have an electrode lead 120. The electrode lead 120 may be connected to an electrode assembly and may extend to the outside of the cell housing 110, serving as an electrode terminal.

[0059] A pair of electrode leads 120 may be provided, and the pair of electrode leads 120 may extend outward from both ends of the battery cell 100, for example, in the longitudinal direction (±Y-axis direction). In this case, the pair of electrode leads 120 may be a positive electrode lead and a negative electrode lead. The battery cell 100 may be configured such that the two electrode leads 120 are located only at one end in the Y-axis direction (e.g., the end in the +Y-axis direction) as needed.

[0060] The battery cell 100 can be configured to stand upright with its edge (excluding the seal 112) facing downwards. For example... Figure 2 As shown, multiple battery cells 100 can stand upright in the vertical direction (Z-axis direction) and be arranged side by side in the horizontal direction (X-axis direction). In this case, each battery cell 100 may have a sealing portion 112 facing the front-back direction (Y-axis direction) and the upward direction (+Z-axis direction) and a storage portion facing the horizontal direction (X-axis direction).

[0061] In this case, refer to Figure 3The cell housing 110 may have a cell platform 112a on the side of the sealing portion 112 where the electrode leads 120 are provided. Additionally, the cell housing 110 may include a folded portion 112b, which is configured to bend from the side of the sealing portion 112 where the electrode leads 120 do not extend. That is, the cell housing 110 may have a folded portion 112b on the side of the sealing portion 112 where the electrode leads 120 are not provided. This folded portion 112b may be provided on the top of the battery cell 100.

[0062] With the battery cell 100 configured as described above, it is easy to control the exhaust direction to one side, and edge cooling can be performed through the edge excluding the sealing part, thereby ensuring cooling performance.

[0063] This disclosure is not limited to a particular type or shape of battery cell 100, and can be applied to various battery cells 100 known at the time of filing of this disclosure. In this embodiment, although a pouch-type secondary battery with high energy density and easy stacking will be described as shown, it is apparent that cylindrical or prismatic secondary batteries can also be applied to the battery cell 100.

[0064] In addition, the battery cell 100 disclosed herein can indicate a single battery or a group of one or more batteries.

[0065] Reference Figure 2 The battery module 10 of this disclosure may further include a busbar frame assembly 600. The busbar frame assembly 600 may be disposed inside the module housing 200 and configured to cover at least one side of the plurality of battery cells 100. In this embodiment, as... Figure 2 As shown, the busbar frame assembly 600 can be connected to the front and rear sides of multiple battery cells 100.

[0066] The busbar frame assembly 600 may include a busbar frame 610 and a plurality of busbars 620. The busbar frame 610 may be configured to substantially connect to the front and rear sides of a plurality of battery cells 100. The busbar frame 610 may have slits for the electrode leads 120 of the battery cells 100 to extend outward in the +Y-axis direction or the -Y-axis direction. Additionally, the busbar frame 610 may be formed of an electrically insulating material such as plastic and configured such that the busbars 620 can be attached to an outer surface.

[0067] As a device for connecting battery cells 100 in series and / or parallel, multiple busbars 620 can be formed of metallic materials such as copper, aluminum, nickel, etc., and can be configured in a bar shape. The electrode leads 120 of the battery cells 100 can pass through the slits of the busbar frame 610 and extend to the outside of the busbar frame 610, and the extended portions can be attached to the surface of the busbars 620 by welding or the like.

[0068] The module housing 200 can be configured to accommodate a plurality of battery cells 100. Specifically, the module housing 200 can be configured to have a formed internal space and to accommodate a plurality of battery cells 100 within the internal space.

[0069] A first vent H1 may be formed in the module housing 200. The first vent H1 may be configured to discharge exhaust gases generated in the battery cell 100 to the outside of the module housing 200.

[0070] For example, such as Figure 1 As shown, a first vent H1 can be formed on the upper surface of the module housing 200. Therefore, directional venting towards the top of the battery module 10 can be achieved through the first vent H1.

[0071] Specifically, multiple first exhaust holes H1 can be set at regular intervals in the horizontal direction (X-axis direction and Y-axis direction).

[0072] Furthermore, considering ease of assembly or assembly tolerances, the module housing 200 and the battery cell 100 can be positioned on one side at a predetermined distance from each other. In this case, when a thermal event occurs in either battery cell 100, the exhaust gas or flame may spread to another adjacent battery cell 100 through the specific gap formed between the battery cell 100 and the module housing 200.

[0073] Therefore, the battery module 10 according to embodiments of the present disclosure may include a compression member 300. The compression member 300 may be disposed inside the module housing 200. More specifically, refer to Figure 4 The compression member 300 can be disposed between one side of the plurality of battery cells 100 and the module housing 200. One side of the module housing 200 can indicate the side forming the first vent H1.

[0074] As described above, the battery cells 100 can stand vertically while being stacked horizontally, and the compression member 300 can be disposed on one side of the battery cells 100 to extend horizontally (the stacking direction of the battery cells 100). Therefore, the compression member 300 can be configured to block the movement of fluid between at least two battery cells 100 in the space between the plurality of battery cells 100 and one side of the module housing 200. The fluid may indicate emitted gases, flames, and / or particles.

[0075] Additionally, at least two battery cells 100 can be separated from each other by a compression member 300. That is, the compression member 300 can be configured to separate the space between at least two battery cells 100. In this case, as... Figure 3As disclosed in the illustrated embodiment, the compression member 300 can be configured to separate the space between all the battery cells 100.

[0076] When a thermal event occurs in any of the battery cells 100, exhaust gases or flames may move toward the space between the battery cells 100 and the module housing 200, and may also move along the stacking direction of the battery cells 100 in the space between the battery cells 100 and the module housing 200, thereby spreading to other adjacent battery cells 100. However, according to the above-described implementation configuration of this disclosure, even if a thermal event occurs in any of the battery cells 100 of the battery module 10, the compression member 300 can suppress the movement of fluids such as exhaust gases, flames, and / or particles to other battery cells 100.

[0077] Therefore, when a thermal event occurs in the battery cell 100, the propagation of emitted gases or flames to adjacent battery cells 100 can be prevented, thereby effectively preventing or delaying the propagation of thermal runaway between battery cells 100. This ensures the safety and reliability of the battery module 10.

[0078] The compression member 300 can be made of a compressible material. For example, the compression member 300 can be made of any of silicone resin, aerogel, polyurethane, etc. Therefore, the compression member 300 can be configured to be disposed between the module housing 200 and the battery cell 100, while being in full contact with them. Thus, fluid movement to other battery cells 100 can be further prevented.

[0079] Furthermore, the compression member 300 can be made of a material with electrical insulating properties. This ensures electrical insulation between the battery cell 100 and the module housing 200. Additionally, the compression member 300 can be made of a material with excellent heat resistance and / or fire resistance. As an example, the compression member 300 can be made of mica. As a result, the compression member 300 can be configured to maintain an airtight structure without deformation even under high temperature and high pressure.

[0080] The compression member 300 may include a variety of materials rather than a single material. For example, the portion of the compression member 300 that contacts the battery cell 100 or the module housing 200 may be made of a compressible material, and the inner side of the compression member 300 may be made of a material with excellent heat resistance and / or fire resistance.

[0081] According to the above-described implementation configuration of this disclosure, the gap between the compression member 300 and the battery cell 100 or module housing 200 can be minimized, while preventing deformation or damage caused by high temperature or high pressure fluids.

[0082] Reference Figure 2The module housing 200 may include a housing body 210 and a top plate 220. The housing body 210 may be configured to have at least an upper opening. For example, the housing body 210 may be configured to have an upper opening as well as a front opening and a rear opening. That is, the housing body 210 may be configured as a U-shaped frame.

[0083] The housing body 210 may be made of a rigid and heat-resistant metallic material in order to physically or chemically protect the battery cell 100 contained therein.

[0084] The top plate 220 can be configured to form the upper side of the module housing 200. The top plate 220 can be connected to cover the upper opening of the housing body 210. The top plate 220 can be connected to the housing body 210 by welding. In this case, the top plate 220 and the housing body 210 can be connected to each other to form a square tube with a front opening and a rear opening.

[0085] The module housing 200 may include end plates 230 disposed on front and rear openings of the housing body 210. The end plates 230 may be welded to the housing body 210. Although not shown in the drawings for convenience, the end plates 230 may be configured such that, for example, the inner surface is made of an insulating material and the outer surface is made of a metallic material. Additionally, the end plates 230 may be partially provided with holes or slits to expose components such as the positive and negative terminals of the battery module 10 or connectors that need to be exposed to the outside.

[0086] In addition, the module housing 200 can be formed in various other shapes. For example, the module housing 200 may include a box-shaped lower housing with an upper opening and an upper cover configured to cover the upper opening of the lower housing.

[0087] In this case, such as Figure 4 As disclosed in the illustrated embodiment, a first vent H1 can be formed on the top plate 220. Additionally, a compression member 300 can be inserted between the battery cell 100 and the top plate 220. That is, the compression member 300 can be configured to fill the space between the upper side of the stacked battery cells 100 and the top plate 220.

[0088] High-temperature gases, such as exhaust gases or flames generated from battery cell 100, have a strong upward trend and may therefore move towards the empty space provided above battery cell 100. In this case, according to the above-described implementation configuration of this disclosure, since the protrusion P is provided on battery cell 100, the travel of heat such as exhaust gases or flames towards other battery cells 100 can be minimized.

[0089] Furthermore, since the compression member 300 is located inside the battery module 10, it does not increase the height of the battery module 10 and does not cause any change in the appearance of the battery module 10. Therefore, according to the above-described implementation configuration of this disclosure, the energy density of the battery module 10 can be prevented from being affected.

[0090] Figure 5 yes Figure 4 The enlarged view of part A in the diagram illustrates the structure of the compression member included in a battery module according to an embodiment of the present disclosure. Additionally, Figure 6 This is a bottom perspective view of a compression member included in a battery module according to an embodiment of the present disclosure.

[0091] The compression member 300 can be configured to fill the space between the battery cell 100 and the module housing 200. The compression member 300 can be configured to extend along both the stacking direction and the longitudinal direction of the battery cells 100. That is, the compression member 300 can be configured to cover one side of the battery cell 100 in the horizontal direction. As a result, the compression member 300 can be configured to separate two battery cells 100 from each other.

[0092] In particular, such as Figure 6 As disclosed in the illustrated embodiment, the compression member 300 can be configured in the form of a sheet. Therefore, the compression member 300 can be configured to be parallel to and opposite the battery cell 100 and the module housing 200. Furthermore, the compression member 300 can be configured such that all its surfaces are in close contact with the module housing 200 and the battery cell 100.

[0093] According to the above-described implementation configuration of this disclosure, the sheet-like compression member 300 disposed in the empty space between the battery cell 100 and the module housing 200 can more reliably block fluids such as flames, particles and high-temperature gases from moving horizontally between the battery cells 100.

[0094] Furthermore, according to the above-described implementation configuration of this disclosure, the sheet-like compression member 300 can be applied to the entire space between the battery cell 100 and the module housing 200, rather than partially separating and dividing the space between the battery cell 100 and the module housing 200. Therefore, even if high temperature or high pressure fluid is generated due to thermal runaway of the battery cell 100, the bulging of the compression member 300 can be minimized, thereby suppressing the formation of empty spaces at the top of the battery cell 100.

[0095] Additionally, refer to Figure 5The compression member 300 can be made of a compressible material so that it can be compressed in the vertical direction by one side of the module housing 200 and the plurality of battery cells 100. As a result, the compression member 300 can be configured to be in close contact with the upper end of the battery cells 100.

[0096] More specifically, the compression member 300 can be configured to contact the sealing portion 112 located at the top of the battery cell 100. That is, the compression member 300 can be configured to contact the fold portion 112b. The compression member 300 can be configured to press the fold portion 112b inward. As a result, the compression member 300 can secure the fold portion 112b.

[0097] According to the above-described implementation configuration of this disclosure, as the compression member 300 is compressed and positioned in the vertical direction, the compression member 300 can make closer contact with the upper side of the battery cell 100. Therefore, the empty space between the battery cell 100 and the module housing 200 is further sealed, thereby further preventing fluids such as exhaust gases or flames from moving across the compression member 300 to another battery cell 100.

[0098] The compression member 300 can be configured with a concave or convex shape corresponding to the shape of the upper side of the battery cell 100. As a more specific example, the compression member 300 can have a protrusion P configured such that at least a portion of it protrudes toward the battery cell 100. The protrusion P can be disposed on the lower surface of the compression member 300. The protrusion P can be configured such that at least a portion of it protrudes downward from the lower surface of the compression member 300.

[0099] Reference Figure 5 The protrusion P can be disposed in the space between at least two battery cells 100. The protrusion P can be configured to block fluid movement between at least two battery cells 100. Figure 5 In the embodiment shown, the protrusion P can be disposed in each space between the two battery cells 100.

[0100] The protrusion P can be configured to have a shape corresponding to the space between the battery cells 100. The protrusion P can be configured to contact the battery cells 100. In particular, the protrusion P can be configured to be in close contact with the folded portion 112b of the battery cell 100.

[0101] Reference Figure 6 Multiple protrusions P can be provided along one direction. One direction can be defined as the direction in which the battery cells 100 are stacked, that is, defined as the left-right direction (parallel to the X-axis). Additionally, the protrusions P can be configured to extend along the longitudinal direction (front-back direction) of the battery cells 100. The protrusions P can be configured to correspond to the length of the battery cells 100 in the front-back direction.

[0102] According to the above-described implementation configuration of this disclosure, both sides of each battery cell 100 can be blocked by the protrusion P, thereby preventing fluids such as exhaust gases from moving toward other battery cells 100. Furthermore, according to the above-described implementation configuration of this disclosure, even if high-temperature or high-pressure fluids are generated due to thermal runaway in the battery cell 100, the bulging of the compression member 300 from the battery cell 100 can be minimized, thereby suppressing the formation of empty spaces above the battery cell 100.

[0103] Figure 7 This is a top perspective view of the compression member included in a battery module according to an embodiment of the present disclosure, and Figure 8 This is an enlarged perspective view of a battery module according to an embodiment of the present disclosure. Figure 9 This is a cross-sectional view of a battery module according to an embodiment of the present disclosure, which may be, for example, along... Figure 1 The cross-sectional view taken from line II-II' in the diagram. Additionally, Figure 10 This is a cross-sectional view illustrating some components of a disassembled battery module according to an embodiment of the present disclosure.

[0104] Reference Figure 7 A second vent H2 can be formed on the compression member 300. The second vent H2 can be formed by perforating at least a portion of the compression member 300. The second vent H2 can be configured to discharge exhaust gases or the like generated in the battery cell 100 to the outside.

[0105] Multiple second vent holes H2 can be arranged at regular intervals in the horizontal direction (X-axis and Y-axis directions). In particular, the second vent holes H2 can be formed at positions corresponding to the first vent holes H1. In addition, the second vent holes H2 can be configured with a shape corresponding to the first vent holes H1.

[0106] According to the above-described implementation configuration of this disclosure, when a thermal event occurs in a specific battery cell 100, exhaust gases and the like can be discharged to the outside of the module housing 200 through the second exhaust port H2 and the first exhaust port H1 provided on one side of the specific battery cell 100.

[0107] Reference Figure 8 and Figure 9 The compression member 300 can be configured to be attached to one side of the module housing 200, for example, to the top plate 220. Specifically, when manufacturing the battery module 10, the compression member 300 can be attached to the top plate 220, and then the top plate 220 can be attached to the housing body 210. In this case, the compression member 300 can be configured to be partially inserted into the first vent hole H1.

[0108] According to the above-described implementation configuration of this disclosure, the assembly position of the compression member 300 can be guided during the process of connecting the compression member 300 to the top plate 220, thereby improving assemblability. Furthermore, according to the above-described implementation configuration of this disclosure, since the compression member 300 is connected to the first vent H1 of the top plate 220, the fixing force can be increased. Therefore, even if thermal runaway occurs inside the battery module 10, deformation or damage to the compression member 300 can be prevented, thereby ensuring the structural stability of the battery module 10.

[0109] As a more specific example, refer to Figure 8 and Figure 9 The compression member 300 may have a connecting portion 310. The connecting portion 310 may be configured to protrude outward from the outer peripheral surface of the second exhaust port H2. That is, the second exhaust port H2 may be provided between the connecting portions 310. The connecting portion 310 may be configured to be inserted into the first exhaust port H1.

[0110] The connecting portion 310 may be formed along the inner periphery of the first exhaust port H1. The connecting portion 310 may be configured to support on the inner surface of the first exhaust port H1. That is, the connecting portion 310 may be configured to protrude vertically (upward) from the body of the compression member 300 and be arranged horizontally relative to the first exhaust port H1 of the top plate 220.

[0111] According to the above-described implementation configuration of this disclosure, the area surrounding the connecting portion 310 is completely blocked, so that exhaust gases generated in the battery cell 100 do not move toward other battery cells 100, but are guided and discharged only toward the first exhaust port H1 and the second exhaust port H2 (see...). Figure 9 (The thick arrow in the image). In other words, the directional exhaust of gas can be guided upward more effectively through the connecting part 310.

[0112] Therefore, according to the above-described implementation configuration of this disclosure, the time that high-temperature exhaust gases or flames remain inside the battery module 10 in the region of the battery cell 100 where a thermal event occurs can be shortened. Thus, an increase in internal pressure within the battery module 10 that could lead to thermal runaway propagation can be prevented or delayed.

[0113] Furthermore, according to the above-described implementation configuration of this disclosure, since the connecting portion 310 is inserted into and fixed to the first vent hole H1, the fixing force between the top plate 220 and the compression member 300 can be increased. Therefore, even if thermal runaway occurs inside the battery module 10, deformation or damage to the compression member 300 can be prevented, thereby ensuring the structural stability of the battery module 10.

[0114] Furthermore, the module housing 200 (particularly the top plate 220) can be made of a metallic material with high thermal conductivity, such as aluminum, so that heat can be transferred through the module housing 200 itself when a thermal event occurs. However, according to the above-described implementation configuration of this disclosure, since the connecting portion 310 of the compression member 300 covers the inner peripheral surface of the first vent H1 (i.e., the top plate 220), the thermal insulation performance of the module housing 200 can be improved. As a result, heat propagation through the module housing 200 can be suppressed.

[0115] Reference Figure 10 The battery module 10 according to embodiments of the present disclosure may further include a blocking member 400. The blocking member 400 may be disposed within the internal space of the module housing 200. The blocking member 400 may be disposed between the battery cells 100. At least one blocking member 400 may be included in a battery module 10. Multiple blocking members 400 may be disposed along one direction in which the battery cells 100 are arranged. The blocking member 400 may be configured to be disposed for each or more battery cells 100.

[0116] Specifically, the blocking member 400 can be configured to separate multiple battery cells 100. The blocking member 400 can be configured to group the multiple battery cells 100. For example, as... Figure 10 As shown, a blocking member 400 can be provided for each group of four battery cells 100, thereby dividing the battery cells 100 into groups of four.

[0117] The barrier member 400 can be configured as a heat-insulating pad that is thinner than the battery cell 100. The barrier member 400 can be made of a material with excellent heat resistance and / or fire resistance. Alternatively, the barrier member 400 can be configured as a compressible pad made of a material such as silicone or aerogel.

[0118] According to the above-described implementation configuration of this disclosure, the battery cell 100 can be partitioned or separated to prevent the spread of gas or flame to other blocking members 400 adjacent to the blocking member 400. Furthermore, according to the above-described implementation configuration of this disclosure, when the battery cell 100 expands, the blocking member 400 can compress the battery cell 100, thereby contributing to the structural rigidity of the battery cell 100.

[0119] One side of the module housing 200 (i.e., the top plate 220) and the blocking member 400 can be configured to be spaced apart from each other by a predetermined distance. Specifically, the blocking member 400 can be configured to extend further outward (e.g., upward) than the battery cell 100. The blocking member 400 can be configured to extend further upward than the housing portion of the battery cell 100. That is, the vertical height of the blocking member 400 can be configured to be greater than the vertical height of the battery cell 100.

[0120] According to the above-described implementation configuration of this disclosure, the blocking member 400 can more reliably separate and isolate the battery cell 100, thereby reliably blocking the movement of exhaust gas or flame.

[0121] The blocking member 400 can be configured to face the protrusion P of the compression member 300. The compression member 300 can be configured such that the end of the blocking member 400 contacts it. The compression member 300 can at least partially contact the upper surface of the blocking member 400. The blocking member 400 can be configured to contact the protrusion P.

[0122] The compression member 300 may contact the surface of the blocking member 400. The compression member 300 and the blocking member 400 may be configured to contact each other along the longitudinal direction of the blocking member 400.

[0123] According to the above-described implementation configuration of this disclosure, since the gap between the compression member 300 and the blocking member 400 is minimized, the space for the exhaust gas to flow through can be reduced, thereby making it more reliable to prevent thermal runaway from propagating to other adjacent battery cells 100.

[0124] Furthermore, according to the above-described implementation configuration of this disclosure, when the top plate 220 is connected to the housing body 210, the lower surface of the compression member 300 and the upper surface of the blocking member 400 can naturally and closely contact each other. Moreover, since the blocking member 400 is compressible, it can contact the compression member 300 more closely. As a result, the space between the blocking member 400 and the compression member 300 is further sealed, and the movement of exhaust gas or flame across the blocking member 400 can be further suppressed.

[0125] In addition, such as Figure 9 and 10 In the embodiment shown, the compression member 300 can be configured such that the end of the blocking member 400 is inserted therein. More specifically, refer to... Figure 10 The compression member 300 may have a retaining groove G formed by at least a portion of the compression member 300 being recessed inward. The blocking member 400 may be configured to be inserted into the retaining groove G. The retaining groove G may be provided in the protrusion P of the compression member 300.

[0126] According to the above-described implementation configuration of this disclosure, the upper end of the blocking member 400 can be in close contact with the fixing groove G without any gap. Therefore, since the blocking member 400 can be inserted into the compression member 300 and supported from both sides, the fixing force between the blocking member 400 and the compression member 300 can be increased. Therefore, the arrangement of the battery cell 100 and the blocking member 400 can be stably maintained.

[0127] Furthermore, the sealing force between the end of the blocking member 400 and the compression member 300 can be reliably ensured. Therefore, according to the above-described configuration, multiple battery cells 100 can be more reliably separated and isolated, thereby effectively preventing or delaying the propagation of thermal runaway between battery cells 100.

[0128] Furthermore, according to the above-described implementation configuration of this disclosure, the following possibility can be reduced: high temperature and high pressure exhaust gas or flame pushes out the blocking member 400 or the blocking member 400 bends due to deformation of the internal pressure of the exhaust gas, causing heat to be transferred to another battery cell 100.

[0129] Furthermore, according to the above-described implementation configuration of this disclosure, when the top plate 220 is connected to the housing body 310, the blocking member 400 can be naturally inserted into the fixing groove G of the compression member 300. Therefore, assemblability can be improved when assembling the battery module 10.

[0130] Figure 11 This is a diagram illustrating a cover member included in a battery module according to another embodiment of the present disclosure, and Figure 12 This is a cross-sectional view of a battery module according to another embodiment of this disclosure. Additionally, Figure 13 This is a diagram illustrating the opening of the cover member when a thermal event occurs in the battery module, according to another embodiment of the present disclosure.

[0131] Reference Figures 11 to 13 The battery module 10 according to the embodiments of the present disclosure may further include a cover member 500.

[0132] Reference Figure 11 and Figure 12 The cover member 500 can be configured to at least partially cover the module housing 200. For example, the cover member 500 can be configured to cover the top plate 220. The cover member 500 can be disposed outside and / or inside the module housing 200.

[0133] Specifically, the cover member 500 can be configured to cover the first vent H1 and the second vent H2. In this case, the cover member 500 can be configured in a sheet shape and can be mounted on the module housing 200. The cover member 500 can be configured to cover multiple first vent H1 and second vent H2 at once.

[0134] The cover member 500 can be configured to suppress the spread of exhaust gases or flames emitted in the event of a thermal event in the battery module 10 to another battery module 10. For this purpose, the cover member 500 can be made of a material with excellent heat resistance and / or fire resistance, such as mica sheets or silicone composites.

[0135] As a result, even when generating high-temperature heat, the cover member 500 can maintain its shape stability without deformation, thereby stably blocking high-temperature gas or flame generated from the battery cell 100.

[0136] According to the above-described implementation configuration of this disclosure, since the cover member 500 is made of a hard and heat-resistant material, deformation caused by high-temperature gas or flame can be minimized.

[0137] like Figure 13 As disclosed in the illustrated embodiment, the cover member 500 can be configured to open and close at least partially by venting gas or a flame. Specifically, at least a portion of the cover member 500 can be configured to rupture due to the pressure or heat of vented gas toward the first vent H1 and the second vent H2. Alternatively, at least a portion of the cover member 500 can be configured to completely separate.

[0138] For this purpose, the cover member 500 may be provided with a notch N. The notch N may be configured to open by venting gas, thereby venting the gas to the outside of the battery module 10.

[0139] Multiple notches N can be provided at regular intervals in the horizontal direction (X-axis and Y-axis directions). In particular, the notches N can be formed at positions corresponding to the first vent H1 and / or the second vent H2. In addition, the notches N can be configured with shapes corresponding to the first vent H1 and / or the second vent H2.

[0140] According to the above-described implementation configuration of this disclosure, when a thermal event occurs in a specific battery cell 100, the notch N provided on one side of the specific battery cell 100 can rupture to open at least one of a plurality of first vent holes H1 and second vent holes H2. Therefore, exhaust gases, etc., can be discharged to the outside of the module housing 200 through the opened first vent holes H1 and second vent holes H2 (see [link to relevant documentation]). Figure 13 (The thick arrow in the middle).

[0141] Furthermore, the cover member 500 can prevent gases or flames emitted to the outside of the module housing 200 from flowing back into the battery module 10. That is, the first vent H1 and the second vent H2, located on the side of the battery cell 100 where no thermal event has occurred, can remain closed. As a result, exhaust gases or flames emitted to the outside through the open first vent H1 and second vent H2 can be substantially prevented from flowing back into the battery module 10. Additionally, the unbroken remaining portion of the cover member 500 can not only block heat but also block high-temperature gases, flames, or emissions generated from the battery cell 100.

[0142] In other words, according to the above-described implementation configuration of this disclosure, when thermal runaway occurs in the battery module 10, not only can the exhaust gas or flame generated inside the battery module 10 be smoothly discharged to the outside of the battery module 10, but the discharged exhaust gas or flame can also be prevented from flowing back into the battery module 10. Therefore, thermal runaway propagation can be effectively prevented or delayed by minimizing the heat propagation to adjacent battery cells 100 or battery module 10.

[0143] Figure 14 This is a schematic perspective view of a battery pack including a battery module according to an embodiment of the present disclosure.

[0144] Reference Figure 14 The battery pack 1 according to embodiments of the present disclosure may include one or more battery modules 10 as described above. The battery pack 1 according to the present disclosure may also include a battery pack housing 2 for housing a battery management system (BMS) for integrated control of charging and discharging of one or more battery modules, current sensors, fuses, etc., and the aforementioned components.

[0145] Figure 15 This is a schematic perspective view of a vehicle including a battery pack according to an embodiment of the present disclosure.

[0146] Reference Figure 15 The vehicle 3 according to embodiments of the present disclosure may include one or more battery packs 1 or battery modules 10 according to embodiments of the present disclosure. The vehicle 3 according to the present disclosure may be, for example, an electric vehicle, a hybrid vehicle, or a plug-in hybrid vehicle. The vehicle 3 includes four-wheeled vehicles and two-wheeled vehicles. The vehicle 3 operates by electricity supplied from the battery pack 1 or battery module 10 according to embodiments of the present disclosure.

[0147] As described above, although this disclosure has been described with reference to limited embodiments and drawings, this disclosure is not limited thereto, and various modifications and variations are possible by those skilled in the art to which this disclosure pertains without departing from the technical concept of this disclosure and within the equivalent scope of the appended claims.

Claims

1. A battery module, the battery module comprising: Multiple battery cells; A module housing configured to accommodate the plurality of battery cells and having a first vent formed on one side of the module housing to discharge exhaust gases generated from the battery cells to the outside; as well as A compression member configured to block fluid movement between at least two battery cells between the plurality of battery cells and one side of the module housing.

2. The battery module according to claim 1, in, The compression member is configured to fill the space between the battery cell and the module housing.

3. The battery module according to claim 1, in, The compression member is configured in a sheet shape.

4. The battery module according to claim 1, in, The compression member is configured to make close contact with the upper end of the battery cell.

5. The battery module according to claim 1, in, The compression member is configured to be partially inserted into the first vent hole.

6. The battery module according to claim 1, in, The compression member has a second vent hole, which is formed at a position corresponding to the first vent hole.

7. The battery module according to claim 6, in, The compression member includes a connecting portion that protrudes outward from the outer peripheral surface of the second exhaust port and is configured to be inserted into the first exhaust port.

8. The battery module according to claim 1, The battery module further includes a blocking member disposed between the battery cells and configured to separate the plurality of battery cells. in, The compression member is configured such that the end of the blocking member contacts the compression member.

9. The battery module according to claim 8, in, The compression member is configured such that the end of the blocking member is inserted into the compression member.

10. The battery module according to claim 1, The battery module also includes a cover member configured to cover one side of the module housing from the outside.

11. The battery module according to claim 10, in, The cover member has a recessed portion, which is located at a position corresponding to the first vent hole.

12. A battery pack comprising a battery module according to any one of claims 1 to 11.

13. A vehicle comprising a battery module according to any one of claims 1 to 11.

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