Battery module, Battery pack and vehicle including the same

Abstract

The present invention may include a plurality of battery cells stacked together, each having a storage portion and a sealing portion; a module case that stores the plurality of battery cells in an internal space; and a pressurizing member, wherein at least one surface is positioned to face at least one surface of a terrace portion in which an electrode lead is located among the sealing portions of the battery cells, and at least another surface is positioned to face at least one surface of the module case, and is configured to pressurize the terrace portion when the internal pressure inside the battery cells increases.

Description

Technology Field

[0001] The present invention relates to a battery module, a battery pack including the same, and an automobile. Background Technology

[0003] Secondary batteries, which possess electrical characteristics such as high energy density and high applicability across product categories, are widely applied not only to portable devices but also to electric vehicles (EVs) or hybrid electric vehicles (HEVs) powered by electric sources.

[0004] These secondary batteries are attracting attention as a new energy source for improving eco-friendliness and energy efficiency, not only for the primary advantage of being able to drastically reduce the use of fossil fuels, but also because they do not generate any by-products from the use of energy.

[0005] Currently, widely used types of secondary batteries include lithium-ion batteries, lithium-polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries. When a high output voltage is required, multiple battery cells are connected in series to form a battery module or battery pack. Additionally, to increase charge / discharge capacity, multiple battery cells are connected in parallel to form a battery module or battery pack. Therefore, the number of battery cells included in the battery module or pack can be varied depending on the required output voltage or charge / discharge capacity.

[0006] Meanwhile, since battery cells involve chemical reactions during charging and discharging, their performance may degrade if used in environments higher than the optimal temperature; furthermore, if thermal control is not maintained at the appropriate temperature, there is a constant risk of unexpected ignition or explosion. Additionally, battery modules are structured to house these battery cells intensively within a module frame. Therefore, if a thermal event occurs in a single battery cell, the emitted high-temperature gases and flames can spread to adjacent cells, potentially leading to a chain reaction of explosions, making this situation extremely dangerous.

[0007] In particular, when a battery module contains multiple battery cells, high-temperature gases, flames, or sparks generated during thermal runaway in a specific battery cell are highly likely to be ejected forward and backward toward the battery cells where the module's electrode leads are located. Consequently, this can cause thermal damage to components located at both ends of the battery module, such as end plates or adjacent parts of busbar frames, and lead to structural collapse.

[0008] Furthermore, heat propagation to adjacent battery modules may occur due to flames ejected externally through the end plates. In particular, if flames generated from a specific battery module transfer to the end plates of other battery modules, the likelihood of heat propagation between modules or chain ignition increases. Consequently, a thermal runaway state may spread to the entire battery pack containing multiple battery modules.

[0009] Therefore, there is a need to develop a structure capable of delaying thermal runaway between battery cells or battery modules by preventing the emission of high-temperature gases or flames from a battery cell when a thermal event occurs in a single battery cell, or by appropriately controlling the direction of emission. The problem to be solved

[0011] Therefore, the problem that the present invention aims to solve is to provide a battery module with improved safety and reliability by appropriately controlling the venting direction of high-temperature gases or flames generated in battery cells during abnormal situations of the battery module, thereby effectively preventing heat propagation between battery cells or battery modules.

[0012] Another technical objective of the present invention is to provide a battery pack including a battery module of an improved structure, and a vehicle including the battery pack.

[0013] The technical problems that the present invention aims to solve are not limited to those described above, and other unmentioned problems will be clearly understood by a person skilled in the art from the description of the invention below. means of solving the problem

[0015] To solve the above problem, the present invention may include a plurality of battery cells stacked together, each having a storage portion and a sealing portion; a module case that stores the plurality of battery cells in an internal space; and a pressurizing member, wherein at least one surface is positioned to face at least one surface of a terrace portion in which an electrode lead is located among the sealing portions of the battery cells, and at least another surface is positioned to face at least one surface of the module case, and is configured to pressurize the terrace portion when the internal pressure inside the battery cells increases.

[0016] The above module case includes a top plate positioned to cover the upper side of the battery cell, and the pressurizing member may be configured to contact the top plate.

[0017] The above-mentioned pressure member may be configured to surround at least a portion of the perimeter of the terrace portion.

[0018] At least a portion of the above-mentioned pressure member may be positioned on the upper side of the sealing portion.

[0019] The above-mentioned pressure member may have a groove formed therein configured to be inserted into at least a portion of the folding area of ​​the sealing portion.

[0020] The above pressurizing member may be configured so that venting occurs in the central part of the battery cell when venting gas is discharged upward from the battery cell.

[0021] The above-mentioned pressurizing member may be formed such that its upper portion extends toward the central portion of the battery cell.

[0022] The above-mentioned pressure member may be configured to surround all four sides of the above-mentioned terrace portion.

[0023] The battery cell further includes a busbar assembly located on the side of the terrace portion where the electrode lead is located among the sealing portions of the battery cell and electrically connected to the electrode lead, and the pressurizing member may be located on the inner side of the busbar assembly.

[0024] The device further includes a barrier member disposed between adjacent battery cells, and the pressurizing member may face at least one surface of the barrier member.

[0025] The above-mentioned pressurizing member may include an insulating or heat-resistant material.

[0026] The above-mentioned pressure member may include two or more different materials.

[0027] The above-mentioned pressure member may include two or more materials with different strengths.

[0028] In addition, the present invention provides a battery pack comprising a battery according to the present invention.

[0029] And, the present invention provides a vehicle comprising a battery pack according to the present invention. Effects of the invention

[0031] According to one aspect of the present invention, when an abnormal situation such as thermal runaway occurs in a battery cell, the discharge of venting gas or flames toward the terrace side can be prevented or suppressed. In particular, within the internal space of a battery module, a relatively large space may exist on the terrace side of the battery cell. However, according to the above aspect, by preventing venting gas or flames from being discharged toward the terrace side from the battery cell where a thermal event has occurred, the propagation of thermal runaway caused by venting gas or flames to other battery cells through the space on the terrace side can be suppressed or blocked.

[0032] In particular, according to one embodiment of the present invention, even if the internal pressure of the battery cell increases, the phenomenon of the fused (sealed) portion of the sealing part opening up due to the pressurizing member is prevented, thereby preventing the sealing of the sealing part from being released. Accordingly, it is possible to prevent high-temperature gas or flames from being discharged to components arranged adjacent to such terrace portions, particularly electrical components such as busbar assemblies or module terminals arranged on the outer side of that direction. Therefore, damage to various parts located in that direction is prevented, and furthermore, electrical connections between battery cells or battery modules are prevented from being unintentionally cut off.

[0033] In addition, according to one aspect of the present invention, directional venting for discharging venting gas, etc., in an intended direction can be more easily implemented. For example, according to one embodiment of the present invention, gas or flame, etc., can be discharged toward the upper side of a battery cell or battery module. In this case, the safety and reliability of a battery module including a plurality of battery cells can be further improved.

[0034] In addition, according to another aspect of the present invention, the pressurizing member is configured to be coupled to the busbar assembly, thereby facilitating the assembly of the pressurizing member and simplifying the manufacturing process.

[0035] In addition, according to another aspect of the present invention, it is possible to prevent other battery modules from suffering thermal damage due to high-temperature gases or flames generated in a specific battery module. In particular, according to this aspect of the present invention, the propagation of thermal runaway between modules can be effectively prevented or delayed.

[0036] Therefore, in this case, it is possible to prevent or delay events such as fire or explosion caused by thermal runaway phenomena in a battery pack containing multiple battery modules or a device equipped with them.

[0037] In particular, in the case of electric vehicles, by suppressing or delaying the propagation of thermal runaway between battery cells or battery modules, sufficient time can be secured for occupants to escape or continue driving.

[0038] In addition to the above, the present invention may have various other effects, which are described in each embodiment, or effects that can be easily inferred by those skilled in the art, etc., will be omitted. Brief explanation of the drawing

[0040] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIG. 1 is a perspective view schematically showing the configuration of a battery module according to one embodiment of the present invention. FIG. 2 is a perspective view showing a partial configuration of the battery module of FIG. 1 separated. FIG. 3 is a perspective view schematically showing the configuration of a battery cell included in a battery module according to one embodiment of the present invention. FIG. 4 is a perspective view showing a part of a battery module including a pressurizing member according to one embodiment of the present invention. FIG. 5 is a front view showing a pressurizing member included in a battery module according to one embodiment of the present invention. FIG. 6 is an upper cross-sectional view showing a state in which a pressurizing member according to one embodiment of the present invention is combined with a battery cell. FIG. 7 is a side cross-sectional view showing a part of a battery module including a pressurizing member according to one embodiment of the present invention. FIG. 8a is a front view showing a pressurizing member according to one embodiment of the present invention. FIG. 8b is an enlarged view of the upper portion of a pressurizing member according to one embodiment of the present invention. FIG. 9 is a side cross-sectional view showing a part of a battery module including a pressurizing member according to another embodiment of the present invention. FIG. 10 is a front view showing a pressurizing member according to another embodiment of the present invention. FIG. 11 is a front view showing a pressurizing member included in a battery module according to another embodiment of the present invention. FIG. 12 is a cross-sectional view showing a pressurizing member included in a battery module according to another embodiment of the present invention. FIG. 13 is a cross-sectional view schematically showing a part of the configuration of a battery module including a pressurizing member according to another embodiment of the present invention. FIG. 14 is a front view showing a pressurizing member according to another embodiment of the present invention. FIG. 15 is a cross-sectional view schematically showing a part of the configuration of a battery module including a pressurizing member according to another embodiment of the present invention. FIG. 16 is a perspective view showing a battery module including a pressurizing member according to another embodiment of the present invention. FIG. 17 is a front view showing a pressurizing member included in a battery pack according to another embodiment of the present invention. FIG. 18 is a drawing showing the process of combining the lower surface of a top plate and a pressure member according to another embodiment of the present invention. FIG. 19 is a drawing showing the process of combining the lower surface of a top plate and a pressure member according to another embodiment of the present invention. FIG. 20 is a schematic exploded perspective view of a battery pack (10) including a battery module (10) according to one embodiment of the present invention. FIG. 21 is a perspective view schematically showing the configuration of a battery pack (1) according to another embodiment of the present invention. FIG. 22 is a schematic perspective view of a vehicle (V) including a battery pack (1) according to one embodiment of the present invention. Specific details for implementing the invention

[0041] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0042] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0043] In addition, the present invention includes various embodiments. For each embodiment, redundant descriptions of substantially identical or similar configurations are omitted, and the focus is on the differences.

[0044] Additionally, to aid in understanding the invention, the attached drawings are not drawn to actual scale, and the dimensions of some components may be exaggerated. Furthermore, the same reference numerals may be assigned to identical components in different embodiments.

[0045] Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless specifically stated otherwise, the first component may also be the second component.

[0046] Throughout the specification, unless specifically stated otherwise, each component may be singular or plural.

[0047] In the following, the statement that any configuration is placed on the "upper (or lower)" of a component or on the "upper (or lower)" of a component may mean not only that any configuration is placed in contact with the upper (or lower) surface of said component, but also that another configuration may be interposed between said component and any configuration placed on (or below) said component.

[0048] In addition, where it is stated that one component is "connected," "combined," or "connected" to another component, it should be understood that while the components may be directly connected or connected to each other, another component may be "interposed" between each component, or each component may be "connected," "combined," or "connected" through another component.

[0049] Singular expressions used in this specification include plural expressions unless the context clearly indicates otherwise. In this application, terms such as "composed of" or "comprising" should not be interpreted as necessarily including all of the various components or steps described in the specification, and should be interpreted as meaning that some of the components or steps may be omitted or additional components or steps may be included.

[0050] Throughout the specification, when "A and / or B" is used, it may mean A, B, or A and B unless specifically stated otherwise.

[0051] Meanwhile, in this specification, unless otherwise specified, the X-axis direction in which a plurality of battery cells (100) are stacked is referred to as the left-right direction, the Y-axis direction which is a horizontal direction orthogonal to the cell stacking direction is referred to as the front-back direction, and the Z-axis direction which is orthogonal to the XY plane is referred to as the up-down direction (vertical direction). Furthermore, in the case of a pouch-type cell, the Y-axis direction may be referred to as the length direction of the cell. Additionally, the left-right direction, the front-back direction, and the up-down direction may each be expressed as the first direction, the second direction, and the third direction, respectively.

[0052] Meanwhile, although terms indicating directions such as up, down, left, right, front, and back may be used in this specification, these terms are used merely for convenience of explanation and may vary depending on the position or arrangement, rotation, or position of the observer, as is obvious to those skilled in the art of this invention.

[0053] FIG. 1 is a perspective view schematically showing the configuration of a battery module (10) according to one embodiment of the present invention. FIG. 2 is a perspective view showing a partial configuration of the battery module (10) of FIG. 1 separated. FIG. 3 is a perspective view schematically showing the configuration of a battery cell (100) included in the battery module (10) according to one embodiment of the present invention.

[0054] Referring to FIGS. 1 to 3, a battery module (10) according to one embodiment of the present invention may include a battery cell (100), a module case (200), a busbar assembly (300), and a pressurizing member (400).

[0055] The battery cell (100) may include an electrode assembly, a cell case (110) that accommodates the electrode assembly, and an electrode lead (120) that is connected to the electrode assembly and extends outward from the cell case (110) to function as an electrode terminal.

[0056] The battery cell (100) may be a pouch-type secondary battery. In such a pouch-type secondary battery, the cell case (110) may be configured in the form of a pouch in which a metal layer made of aluminum is interposed between polymer layers.

[0057] Specifically, referring to FIG. 3, the battery cell (100) may be provided with a storage portion (R) and a sealing portion (S). Here, the storage portion (R) may represent a portion in which an electrode assembly and an electrolyte are stored. For example, the cell case (110) may have a storage portion (R) located in the central portion (102) of two pouches, such as a left pouch and a right pouch, and the edge portion of such a storage portion (R) may be sealed. At this time, at least some of the storage portions (R) of the two pouches may have an internal space formed with a concave shape facing the electrode assembly, and the electrode assembly may be mounted in such an internal space. In the embodiment illustrated in FIG. 3, a double cup shape is shown in which the storage portion (R) is formed on both sides of the cell case (110), but the present invention is not necessarily limited to such a shape of the cell case (110). For example, the battery cell (100) may be configured in the form of a single cup in which the storage portion (R) is formed only on one side of the cell case (110).

[0058] The sealing portion (S) can be described as a heat-fused portion of the perimeter of the storage portion (R) that surrounds the perimeter of the storage portion (R). That is, the sealing portion (S) can be provided by sealing the outer perimeter of the storage portion (R). In particular, the battery cell (100) can be described as having four sides (corners) centered on the storage portion (R). At this time, it can be configured with all four sides sealed, or with only three sides sealed. At this time, a cell with four sides sealed can be called a four-sided sealed cell, and a cell with three sides sealed can be called a three-sided sealed cell. For example, in the embodiment illustrated in FIG. 3, the battery cell (100) is configured in an upright position, with the front, rear, and top ends of the left pouch and the right pouch sealed, and the bottom ends of the left pouch and the right pouch unsealed and connected to each other, and configured in a folded form. In this case, the battery cell (100) can be said to have three sides sealed.

[0059] Each battery cell (100) may be provided with an electrode lead (120). This electrode lead (120) includes a positive lead and a negative lead, and the positive lead and the negative lead may be provided to protrude from the same side (corner) or different sides of the battery cell (100). In this case, if the positive lead and the negative lead are located on the same side, it is called a unidirectional cell, and if the positive lead and the negative lead are located on different sides, particularly opposite sides, it is called a bidirectional cell.

[0060] The electrode lead (120) may be configured to be drawn out toward the front and / or rear side of the sealing portion (S) of the battery cell (100). At this time, the sealing portion (S) into which the electrode lead (120) is drawn out may be defined as a terrace portion (T). Here, the terrace portion (T) may refer to a sealing portion (S) that extends vertically from the front and / or rear of the battery cell (100).

[0061] Referring to FIG. 3, the sealing portion (S) may include two terrace portions (T) and an upper sealing portion (S1). Here, the two terrace portions (T) may refer to a front sealing portion and a rear sealing portion of the battery cell (100).

[0062] Referring to the part marked A in FIG. 3, the upper sealing portion (S1) can be folded at least once. That is, the upper sealing portion (S1) can form a folding area (F) formed by folding a part of it. The front sealing portion or the rear sealing portion, i.e., the terrace portion (T), is the part where the electrode lead (120) is located, so it can be stored inside the module case (200) as is without being folded. Alternatively, the upper sealing portion (S1) can be stored inside the module case (200) in a folded state.

[0063] A plurality of battery cells (100) may be included in a battery module (10). And, these plurality of battery cells (100) may be stacked on top of each other in at least one direction. For example, a plurality of battery cells (100) may each be placed upright in a vertical direction (Z-axis direction) and arranged side by side in a left-right direction (X-axis direction). In particular, in the case of a three-sided sealing cell, each battery cell (100) may be provided in an upright state with the side not containing the sealing portion (S) facing downward. At this time, each battery cell (100) may have the sealing portion (S) facing in the front-back direction (Y-axis direction) and upward (+Z-axis direction), and the storage portion (R) facing in the left-right direction (X-axis direction).

[0064] Meanwhile, the present invention is not limited by the specific type or shape of such battery cell (100), and various battery cells (100) known at the time of filing the present invention may be employed to implement the cell assembly of the present invention. In this embodiment, a pouch-type secondary battery with high energy density and easy stacking is used as shown in the drawing, but it is understood that cylindrical or prismatic secondary batteries may also be applied as battery cells (100).

[0065] With reference to FIGS. 1 and 2, the module case (200) may be configured to accommodate a plurality of battery cells (100) in its internal space. That is, the module case (200) has an empty space formed inside, and a plurality of battery cells (100) can be accommodated in this internal space. For example, the module case (200) may define the internal space by providing a top plate, a bottom plate, a left plate, a right plate, a front plate, and a rear plate. Then, a plurality of battery cells (100) may be positioned in the internal space thus defined. Here, the module case (200) may include metal and / or plastic materials.

[0066] Additionally, at least some of the various plates constituting the module case (200) may be configured in a form that is integrated with one another. For example, referring to FIG. 2, the module case (200) may be configured in a monoframe form in which the top plate, bottom plate, left plate, and right plate are integrated with one another. In this case, the front and rear of the monoframe may have an open form, and the front plate and rear plate may be connected to the front and rear openings of the monoframe as end frames to seal the internal space of the monoframe. As another example, the module case (200) may be configured in a U-frame form in which the bottom plate, left plate, and right plate are integrated with one another. In this case, the top plate, front plate, and rear plate may be connected to the upper, front, and rear ends of the U-frame. Meanwhile, various fastening methods, such as welding or bolting, may be used when connecting each component of the module case (200). However, the present invention is not limited by the specific material, shape, or connection method of such module case (200).

[0067] According to one embodiment, although not shown in the drawings, at least one of the various plates constituting the module case (200), such as the top plate, may include at least one venting area through which venting gas discharged from the battery cell (100) is discharged. For example, the venting area may be either a venting hole or a preliminary break line. According to one embodiment of the present invention, a venting area may be provided on the top plate of the module case (200) to induce directional venting toward the upper side of the battery module (10).

[0068] The busbar assembly (300) may be configured to be electrically connected to the electrode leads (120). The busbar assembly (300) may be configured to allow the electrode leads (120) of a plurality of battery cells (100) to be connected to each other. More specifically, the busbar assembly (300) may be configured to support the electrode leads (120), facilitate the interconnection of the electrode leads (120), and enable sensing of voltage, etc., from the electrode leads (120).

[0069] The busbar assembly (300) may be positioned adjacent to the terrace portion (T) where the electrode lead (120) is located among the sealing portions (S) of the battery cell (100). For example, the busbar assembly (300) may be positioned adjacent to the terrace portion (T) where the electrode lead (120) is located among the sealing portions (S) facing the front (one side facing the -Y-axis direction) of the battery cell (100).

[0070] The busbar assembly (300) may include a busbar terminal (310) and a busbar frame (320), as shown in FIG. 2.

[0071] The busbar terminal (310) may be configured to electrically connect two or more electrode leads (120) or to be connected to one or more electrode leads (120) to transmit sensing information to a control unit such as a battery management system (BMS).

[0072] Additionally, the busbar frame (320) may be made of an electrically insulating material, such as plastic. The busbar frame (320) may be configured to allow the busbar terminal (310) to be seated and fixed. Furthermore, the busbar frame (320) may have a busbar slit (321) formed therein. Additionally, the busbar terminal (310) may be attached to the outer side of the busbar frame (320), such as the front side (-Y-axis direction). In this case, the electrode lead (120) may pass through the busbar slit (321) of the busbar frame (320) and come into contact with the busbar terminal (310) located on the outer side. In particular, the electrode lead (120) may be combined and fixed with the busbar terminal (310) either alone or in a stacked state. At this time, the method of fixing the connection between the electrode lead (120) and the busbar terminal (310) may be a method such as laser welding or ultrasonic welding, but various other fastening methods may also be applied.

[0073] The pressure member (400) may be located inside the busbar assembly (300). Specifically, with reference to FIG. 6, the pressure member (400) may be located inside the busbar frame (320), and the busbar terminal (310) may be located outside the busbar frame (320). In other words, the pressure member (400) and the busbar terminal (310) may be positioned in opposite directions with the busbar frame (320) in between. In this case, the electrode lead (120) may pass through the busbar slit (321) of the busbar frame (320) and come into contact with the busbar terminal (310) located outside.

[0074] FIG. 4 is a perspective view showing a part of a battery pack including a pressurizing member according to an embodiment of the present invention. FIG. 5 is a front view showing a pressurizing member included in a battery pack according to an embodiment of the present invention. FIG. 6 is an upper cross-sectional view showing a state in which a pressurizing member according to an embodiment of the present invention is coupled with a battery cell. FIG. 7 is a side cross-sectional view showing a part of a battery pack including a pressurizing member according to an embodiment of the present invention.

[0075] Referring to FIGS. 4 and 5, at least a portion of the pressurizing member (400) may be positioned to face at least one side of the terrace portion (T). The pressurizing member (400) may be configured to press the terrace portion (T) from both sides of the terrace portion (T). One side of the pressurizing member (400) may be positioned to face the first side (111) of the terrace portion (T), and the other side of the pressurizing member (400) may be positioned to face the second side (112) of the terrace portion (T) facing in the opposite direction to the first side (111). Here, the first side (111) of the terrace portion (T) may be a side facing the left direction (e.g., -X-axis direction), and the second side (112) may be a side facing the right direction (e.g., +X-axis direction). For example, as indicated by the arrow in the drawing, the part of the pressing member (400) positioned to the left of the terrace section (T) can press the terrace section (T) in the right direction, and the part positioned to the right of the terrace section (T) can press the terrace section (T) in the left direction.

[0076] The pressurizing member (400) may be configured to pressurize the terrace portion (T) when the internal pressure inside the battery cell (100) increases. The pressurizing member (400) may pressurize not only the electrode lead (120) but also the entire or part of the terrace portion (T) to prevent the terrace portion (T) from opening up even partially.

[0077] According to the above embodiment of the present invention, the pressurizing member (400) may be configured to prevent the terrace portion (T) from spreading or separating. In particular, the sealing portion (S) (e.g., the terrace portion (T)) of the battery cell (100) is a fused portion, and its durability against high temperature, pressure, flame, etc. may be weaker than that of the housing portion (R) of the battery cell (100). However, according to the above embodiment of the present invention, since the terrace portion (T) of the battery cell (100) is protected by the pressurizing member (400), it is possible to prevent or avoid being affected by venting gas or flame, etc. emitted from other battery cells (100). Therefore, in this case, it is possible to effectively prevent thermal runaway propagation between battery cells (100) within the battery module (10).

[0078] In addition, by applying pressure from both sides (e.g., left side, right side) of the terrace section (T), it is possible to prevent the terrace section (T) from spreading out to both sides or moving in one direction. When the terrace section (T) is pressed from both sides in this manner, the pressure on the terrace section (T) is reliably applied, thereby further improving the sealing performance of the terrace section (T).

[0079] According to one embodiment, when referring to the portion labeled B in FIG. 5, the pressurizing member (400) may be positioned such that at least one surface faces at least one surface of the module case (200). In other words, at least one surface of the pressurizing member (400) may be formed to extend toward the module case (200).

[0080] Referring to FIG. 4, one side of a battery cell (100) and one side of a module case (200) configured to house the battery cell (100) may be spaced apart by a specified distance. That is, an empty space (g) may be formed between one side of the battery cell (100) and one side of the module case (200) configured to house the battery cell (100). When a thermal event occurs, venting gas or flames ejected from the battery cell (100) may move to other surrounding battery cells (100) through the empty space (g).

[0081] According to the above embodiment of the present invention, when a thermal event occurs in any one battery cell (100), high-temperature gas or flames emitted can be prevented from being transferred to other battery cells (100) through the empty space (g) between the module case (200) and the battery cell (100). Therefore, a chain reaction of explosions of battery cells (100) can be prevented and / or delayed.

[0082] Referring to FIG. 4, the pressurizing member (400) may be in a form that extends vertically (in the Z-axis direction) along the terrace section (T). To prevent venting gas from venting from the terrace section (T), the pressurizing member (400) may be configured to extend vertically along the shape of the terrace section (T) and to pressurize the entire terrace section (T). For example, the vertical length of the pressurizing member (400) may be substantially the same as or longer than the vertical length of the terrace section (T).

[0083] That is, the pressurizing member (400) continuously applies pressure to the entire terrace section (T) from the bottom to the top, thereby preventing the entire terrace section (T) from spreading or rupturing. According to the above embodiment of the present invention, venting gas or flames, etc., can be completely blocked from venting from the terrace section (T), and the terrace section (T) can be more reliably prevented from rupturing due to pressure from venting gas or flames, etc.

[0084] The pressurizing members (400) may be composed of multiple members. The multiple pressurizing members (400) may be spaced apart at regular intervals along the stacking direction (X-axis direction) of the battery cell (100).

[0085] Referring to FIGS. 4 and FIGS. 5, the module case (200) may include a top plate (210) (e.g., a top plate). The top plate (210) may be positioned to cover the upper side of the battery cell (100). At this time, referring to the portion marked B in FIG. 5, the pressing member (400) may be configured to be in contact with the top plate (210) of the module case (200). That is, the upper surface of the pressing member (400) may be in direct contact with the top plate (210).

[0086] Referring to FIGS. 2 and FIGS. 7, the battery cell (100) can be divided into an edge portion (101) at the front and rear and a central portion (102) between them. The pressing member (400) is configured to extend vertically (in the Z-axis direction) to the top plate (210) so as to press the edge portion (101) with respect to the length direction (Y), even among the upper portions of the battery cell (100) (e.g., upper sealing portion (S1)).

[0087] The pressurizing member (400) can induce high-temperature gas or flames generated in the battery cell (100) to vent upward when there is an abnormal situation of the battery module (10). When the front and / or rear terrace portion (T) of the battery cell (100) is pressurized by the pressurizing member (400), venting can be induced in a direction other than the front and / or rear of the battery module. For example, in this case, it can be more suitablely applied to top venting that induces directional venting in the upward direction of the battery module.

[0088] According to the above embodiment of the present invention, not only can front and / or rear venting be prevented through the terrace portion (T), but venting can also be prevented at the front and / or rear edge portion (101) in the upper direction of the battery module (10). At the same time, venting can be induced at the central portion (102) excluding the front and / or rear edge portion (101) in the upper direction of the battery cell (100).

[0089] According to the above embodiment of the present invention, high-temperature gas or flames emitted from one battery cell (100) can be prevented from being transferred to other battery cells (100) through the empty space (g) between the top plate (210) and the battery cell (100). Thus, a chain reaction of explosions of battery cells (100) can be prevented and / or delayed.

[0090] According to one embodiment, the upper surface of the pressure member (400) and the lower surface of the top plate (210) may be joined using an adhesive or the like. For example, an adhesive member (not shown), such as an adhesive or adhesive tape, may be placed between the upper surface of the pressure member (400) and the lower surface of the top plate (210). However, the method of joining the pressure member (400) and the top plate (210) is not limited by the above embodiment and can be modified in various ways.

[0091] The pressure member (400) may include an insulating or heat-resistant material. For example, the pressure member (400) may be made of an insulating or heat-resistant material or may include a material of such material. For example, the pressure member (400) may include at least one of a material such as plastic, rubber, silicon, aerogel, metal, and GFRP (glass fiber reinforced plastic) which has strong insulating and / or heat-resistant (including fire-resistant) performance. For example, the pressure member (400) may include a metal material having rigidity and heat resistance to prevent physical or chemical rupture of the terrace portion (T).

[0092] According to the above embodiment of the present invention, the heat or flame blocking performance of the terrace section (T) can be more stably secured. More specifically, according to the above embodiment, through a pressurized member (400) including thermal insulation or heat resistance performance, the movement of venting gas or flames, etc., from the space around the terrace section (T) to other surrounding battery cells (100) can be effectively blocked.

[0093] However, the material of the pressurizing member (400) is not limited by the above embodiment, and there are no special restrictions on the material as long as it can exhibit a certain thermal insulation performance or heat resistance performance.

[0094] FIG. 8a is a front view showing a pressurizing member according to one embodiment of the present invention. FIG. 8b is an enlarged view of the upper portion of the pressurizing member according to one embodiment of the present invention.

[0095] Referring to FIG. 5 and FIG. 8a, the pressure member (400) may be configured to wrap around at least a portion of the perimeter of the terrace portion (T). The pressure member (400) may wrap around at least three sides of the terrace portion (T). The pressure member (400) may wrap around both sides of the terrace portion (T) and one side between them. For example, the pressure member (400) may wrap around the first side (111), the second side (112) of the terrace portion (T), and one side between them (e.g., the top side).

[0096] The pressure member (400) may include a first pressure portion (410) positioned to face the first surface (111) of the terrace portion (T), a second pressure portion (420) positioned to face the second surface (112) of the terrace portion (T) facing the opposite direction to the first surface (111), and a third pressure portion (430) connecting the first pressure portion (410) and the second pressure portion (420).

[0097] The first pressure portion (410) and the second pressure portion (420) may be arranged side by side with the terrace portion (T) in between. The third pressure portion (430) may be arranged vertically with respect to the first pressure portion (410) and the second pressure portion (420). For example, the pressure member (400) may be in the shape of a 'C'.

[0098] The pressure member (400) may further include a slit (401) surrounded by the first pressure portion (410), the second pressure portion (420), and the third pressure portion (430). A terrace portion (T) may penetrate the pressure member (400) through the slit (401).

[0099] The slit (401) may be formed to extend long in the vertical direction (Z-axis direction). The upper side of the slit (401) is blocked by the third pressurizing part (430), and the lower side of the slit (401) may be open. Accordingly, when assembling the pressurizing member (400) to the battery cell (100), the pressurizing member (400) may be assembled from the upper direction to the lower direction, and the terrace part (T) may be assembled to pass through the slit (401) that is open in the lower direction.

[0100] The width (length in the X-axis direction) (W1) of the slit (401) may be substantially the same as or wider than the thickness (length in the X-axis direction) of the terrace portion (T).

[0101] According to one embodiment, the width (length in the X-axis direction) (W1) of the slit (401) may be wider than the thickness (length in the X-axis direction) of the terrace portion (T). That is, one side of the pressurizing member (400) may be positioned so as to be spaced apart from the terrace portion (T) by a predetermined distance. Here, the predetermined distance may mean a gap that allows the volume to swell when the battery cell (100) swells, while preventing the battery cell (100) from spreading due to thermal runaway.

[0102] Therefore, swelling phenomena in which the battery cell (100) expands beyond a certain level can be absorbed or allowed to some extent. At the same time, when thermal runaway occurs in a specific battery cell (100), even if the internal pressure of the battery cell (100) increases, the phenomenon of the fused (sealed) portion of the sealing part opening up can be prevented by the pressurizing member (400).

[0103] According to another embodiment, the width (length in the X-axis direction) (W1) of the slit (401) may be substantially the same as the thickness (length in the X-axis direction) of the terrace portion (T). That is, the pressurizing member (400) may be configured to contact at least one surface of the terrace portion (T). The pressurizing member (400) may be in close contact with at least one surface of the terrace portion (T). In this case, the pressurizing member (400) may be configured to pressurize and / or compress the terrace portion (T) from the beginning. That is, even when no thermal event occurs in the battery cell (100), the pressurizing member (400) may always be configured to contact the terrace portion (T) and pressurize the terrace portion (T) to a pressure greater than a certain level.

[0104] According to the above embodiment of the present invention, even in a normal state, the pressurizing member (400) pressurizes the terrace section (T), so that the terrace section (T) can be pressurized from the initial stage when thermal runaway occurs. Therefore, by more reliably preventing the separation of the terrace section (T), the venting gas and the like can be fundamentally blocked from escaping through the terrace section (T). In addition, even in a normal state where thermal runaway does not occur, the terrace section (T) is pressurized so that the position of the terrace section (T) of each battery cell (100) is fixed more stably, and furthermore, the movement of the battery cell (100) can be prevented.

[0105] According to one embodiment, the first pressure portion (410), the second pressure portion (420), and the third pressure portion (430) of the pressure member (400) may be formed integrally. According to another embodiment, the first pressure portion (410), the second pressure portion (420), and the third pressure portion (430) of the pressure member (400) may be bonded together using an adhesive or the like. However, the bonding method of the pressure member (400) is not limited by the above embodiments and may be modified in various ways.

[0106] According to the above embodiment of the present invention, since a plurality of pressing members (400) pressing a single terrace portion (T) each press the terrace portion (T) rather than pressing the terrace portion (T) from different directions, pressing is easy and the pressing force can be relatively large. In addition, it can be easy for the pressing member (400) to be fixed and coupled to the battery cell (100).

[0107] At least a portion of the pressure member (400) may be positioned above the sealing portion (S). At least a portion of the pressure member (400) may be located above the upper sealing portion (S1). That is, the pressure member (400) may cover at least a portion of the upper sealing portion (S1).

[0108] Specifically, the third pressurizing portion (430) may be positioned above the first pressurizing portion (410) and the second pressurizing portion (420). The third pressurizing portion (430) may be located above the upper sealing portion (S1). That is, the vertical height of the pressurizing member (400) may be higher than the vertical height of the battery cell (100).

[0109] According to the above embodiment of the present invention, the upper sealing portion (S1) may be formed to protrude upward from the storage portion (R) of the battery cell (100). Accordingly, it may be suitable in terms of space utilization for the pressurizing member (400) to protrude upward from the battery cell (100).

[0110] A groove (431) may be formed in the pressure member (400) such that at least a portion of the folding area (F) of the upper sealing portion (S1) is inserted therein. The groove (431) may be formed in the third pressure portion (430) of the pressure member (400). The groove (431) may be a structure that extends from the slit (401) of the pressure member (400) and is recessed in the upward direction.

[0111] The size of the groove (431) may be substantially the same as or larger than the size of the folding area (F) of the sealing portion (S). For example, the groove (431) may be a shape that extends from the slit (401) and extends to the right (+X-axis direction) from the slit (401) to correspond to the shape of the folding area (F). For example, the groove (431) may be a rectangular shape consisting of a horizontal plane and a vertical plane. For example, the groove (431) may include an inclined surface corresponding to the shape of the folding area (F). For example, at least a portion of the groove (431) may be formed as a curved surface. However, the shape and size of the groove (431) are not limited by the above embodiment, and any shape and size in which the upper sealing portion (S1) (e.g., folding area (F)) can be inserted may be possible.

[0112] According to the above embodiment of the present invention, the pressure member (400) can protect the upper portion of the sealing portion (S), that is, the upper sealing portion (S1). In addition, it can prevent the folded portion of the folding area (F) of the upper sealing portion (S1) from unfolding or deforming in shape.

[0113] The pressurizing member (400) can be configured so that venting occurs in the central part (102) of the battery cell (100) when venting gas is discharged upward from at least one battery cell (100).

[0114] The pressurizing member (400) can induce high-temperature gas or flames generated in the battery cell (100) to vent upward when there is an abnormal situation of the battery module (10). When the front and / or rear terrace portion (T) of the battery cell (100) is pressurized by the pressurizing member (400), venting can be induced in a direction other than the front and / or rear of the battery module (10). For example, in this case, it can be more suitablely applied to top venting that induces directional venting in the upward direction of the battery module (10).

[0115] If venting gas is discharged in the upward direction of the battery cell (100), the edge portion (101) of the upper sealing portion (S1) may rupture. In this case, the same problem as venting from the terrace portion (T) may occur. For example, if venting gas is discharged to the edge portion (101) (front and rear) of the upper sealing portion (S1), the venting gas may move toward the terrace portion (T), where a relatively large space exists within the internal space of the battery module (10). Additionally, venting gas or flames may be transmitted to other battery cells (100) through the space on the terrace portion (T).

[0116] According to the above embodiment of the present invention, the pressurizing member (400) surrounds the edge portion (101) of the upper sealing portion (S1), thereby suppressing venting through the edge portion (101). Additionally, according to the above embodiment of the present invention, while inducing top venting, venting can be made to occur at the central portion (102) of the battery cell (100).

[0117] FIG. 9 is a side cross-sectional view showing a part of a battery pack including a pressurizing member according to another embodiment of the present invention.

[0118] The above-mentioned pressure member (400) may be formed such that its upper portion (upper end in the vertical direction) extends toward the central portion (102) of the battery cell (100). That is, the third pressure portion (430) may be formed to extend toward the central portion (102) of the battery cell (100). The third pressure portion (430) may extend in a direction perpendicular to the first pressure portion (410) and the second pressure portion (420). For example, the pressure member (400) may be in the shape of an 'L'.

[0119] The length of the portion of the third pressurized portion (430) that extends in the longitudinal direction (Y-axis direction) toward the central portion (102) of the battery cell (100) may be the first length (L1). For example, the first length (L1) may be a predetermined length that allows venting gas discharged from the battery cell (100) to vent upward while restricting venting toward the edge portion (101). For example, the first length (L1) may be 2% or more and 25% or less of the length (Y-axis direction length) of the battery cell (100). For example, the first length (L1) may be 5% or more and 20% or less of the length (Y-axis direction length) of the battery cell (100).

[0120] According to one embodiment, compared to FIG. 7, the area surrounded by the pressurizing member (400) (third pressurizing part (430)) in the upper sealing part (S1) can be relatively increased. According to the above embodiment of the present invention, venting to the central part (102) among the upper parts of the battery cell (100) can be further induced, and venting to the edge part (101) can be effectively prevented.

[0121] FIG. 10 is a front view showing a pressurizing member according to another embodiment of the present invention.

[0122] The pressure member (400) may be configured to surround all four sides of the terrace portion (T). The terrace portion (T) may be surrounded by the pressure member (400) on the upper side, lower side, left side, and right side.

[0123] As shown in the part marked C in FIG. 10, the pressure member (400) may further include a fourth pressure member (440) that connects the first pressure member (410) and the second pressure member (420) and is positioned below the first pressure member (410) and the second pressure member (420). The fourth pressure member (440) may be positioned vertically with respect to the first pressure member (410) and the second pressure member (420). The fourth pressure member (440) may be positioned parallel to the third pressure member (430). For example, the pressure member (400) may be in the shape of a square.

[0124] According to the above embodiment of the present invention, assembly of the pressure member (400) may be easier. In addition, the fixing force between the pressure member (400) and the battery cell (100) is further strengthened, and the terrace portion (T) can be more effectively prevented from shaking upward or downward.

[0125] FIG. 11 is a front view showing a pressurizing member included in a battery pack according to another embodiment of the present invention. FIG. 12 is a cross-sectional view showing a pressurizing member included in a battery module according to another embodiment of the present invention.

[0126] The battery module (10) may further include a barrier member (500). The barrier member (500) may be interposed between adjacent battery cells (100). For example, the barrier member (500) may be in the shape of a plate in a vertically oriented state. That is, when the battery cells (100) are stacked in at least one direction, the barrier member (500) may be interposed between the stacks of battery cells (100). For example, when a plurality of battery cells (100) are stacked in the X-axis direction, the barrier member (500) may be inserted between adjacent battery cells (100). One or more barrier members (500) may be provided in a single battery module (10). In particular, when three or more battery cells (100) are included, a plurality of barrier members (500) may be provided and interposed between each battery cell (100).

[0127] The barrier member (500) may be configured to suppress the transmission of heat, flame, pressure, shock, etc. between battery cells (100). For example, the barrier member (500) may be configured as a thermal barrier to block the transmission of heat or flame between battery cells (100). Alternatively, the barrier member (500) may be configured as a compression pad to absorb pressure or shape change caused by swelling between battery cells (100). The barrier member (500) according to the present invention may employ various components interposed between battery cells (100) in a conventional battery module or battery pack (e.g., battery pack (1) of FIG. 19).

[0128] In particular, the barrier member (500) may be interposed between the storage portions (R) of adjacent battery cells (100). That is, as previously described, each battery cell (100) may have a storage portion (R) in the central portion (102), and the barrier member (500) may be interposed between the storage portions (R) of the battery cells (100) and positioned to face the storage portions (R) of adjacent battery cells (100).

[0129] According to one embodiment, the barrier member (500) may be extended so as to protrude from between the storage portion (R) of the adjacent battery cell (100) at least one side to between the sealing portion (S), particularly the terrace portion (T) of the adjacent battery cell (100).

[0130] The pressure member (400) may face at least one surface of the barrier member (500). The pressure member (400) may be attached to one surface of the barrier member (500). According to one embodiment, the battery module (10) according to the present invention may further include an adhesive member (501) disposed between the pressure member (400) and the barrier member (500). That is, the pressure member (400) may be adhesively fixed to the barrier member (500). In addition, the pressure member (400) may be fixed to the barrier member (500) by various other fastening methods.

[0131] According to the above embodiment of the present invention, the pressure member (400) can be supported by the barrier member (500). Additionally, the pressure member (400) can be attached to the barrier member (500) to further improve the fixing force of the pressure member (400).

[0132] FIG. 13 is a cross-sectional view schematically showing a part of a battery module including a pressurizing member according to another embodiment of the present invention. FIG. 14 is a front view showing a pressurizing member according to another embodiment of the present invention. FIG. 15 is a cross-sectional view schematically showing a part of a battery module including a pressurizing member according to yet another embodiment of the present invention.

[0133] According to one embodiment, the pressurizing member (400) may include two or more different materials. Additionally, the pressurizing member (400) may be composed of a plurality of layers.

[0134] Referring to FIGS. 13 and 14, the pressurizing member (400) may include a first pressurizing layer (401) comprising a first material and a second pressurizing layer (402) comprising a second material different from the first material. For example, the first pressurizing layer (401) may be positioned to face a sealing portion (S) (e.g., a terrace portion (T) and an upper sealing portion (S1), and the second pressurizing layer (402) may be positioned to face a barrier member (500).

[0135] According to the above embodiment of the present invention, the material may be different depending on the layer of the pressurizing member (400) to support the adjacent terrace portion (T) and simultaneously include the function of absorbing swelling when the swelling phenomenon of the battery cell (100) occurs.

[0136] According to one embodiment, the pressurizing member (400) may include two or more materials with different strengths. For example, the first material and the second material may have different strengths. Here, strength can be used in substantially the same sense as hardness, strength, firmness, elasticity, etc. For example, the first material and the second material may have different elastic forces. In this case, the first material of the first pressurizing layer (401) facing the terrace portion (T) may have lower hardness than the second material of the second pressurizing layer (402).

[0137] According to the above embodiment of the present invention, the first pressure layer (401) facing the terrace portion (T) is composed of a material having a relatively lower hardness than the second pressure layer (402), so that when a swelling phenomenon occurs in which the battery cell (100) expands beyond a certain level, it is compressed to absorb or allow the swelling of the battery cell (100) to some extent. However, since the second pressure layer (402) has a higher hardness than the first pressure layer (401), it can limit the swelling of the battery cell (100). Therefore, it is possible to prevent the terrace portion (T) of the battery cell (100) from completely opening or spreading out when a thermal event occurs in the battery cell (100).

[0138] According to another embodiment, with reference to FIG. 15, the pressurizing member (400) may further include a third pressurizing layer (403) comprising a third material different from the second material. For example, the first pressurizing layer (401) and the third pressurizing layer (403) may be arranged to face each of the adjacent terrace portions (T) or barrier members (500). For example, the third material may have a different hardness from the second material. For example, the third material may have a different elasticity from the second material. For example, the first material and the third material may be different materials, or they may be substantially the same material. According to one embodiment, the first pressurizing layer (401) and the third pressurizing layer (403) may have a relatively lower hardness than the second pressurizing layer (402).

[0139] According to one embodiment, as shown in FIG. 14, the first pressurizing portion (410) and the second pressurizing portion (420) are composed of the first pressurizing layer (401) and the second pressurizing layer (402), but the third pressurizing portion (430) may be composed only of the second pressurizing layer (402). The third pressurizing portion (430) may not directly face the swelling portion when the battery cell (100) swells. Therefore, the third pressurizing portion (430) may be made of a material suitable for securing structural or mechanical stability rather than responding to swelling with respect to the pressurizing member (400).

[0140] According to the above embodiment of the present invention, swelling phenomena in which the battery cell (100) expands beyond a certain level are allowed, while preventing the terrace portion (T) of the battery cell (100) from opening when a thermal event occurs in the battery cell (100).

[0141] FIG. 16 is a perspective view showing a part of a pressurizing member according to another embodiment of the present invention.

[0142] One side of the third pressure portion (430) facing the -X axis may be in the shape of a flat plate in which no groove (e.g., groove (431) in FIG. 8a) is formed. That is, the upper sealing portion (S1) and / or folding area (F) surrounded by the third pressure portion (430) may not be exposed to the outside. When viewed from the X-axis direction, the upper sealing portion (S1) and / or folding area (F) may not be visible.

[0143] The third pressure portion (430) may be configured to protrude to the left (-X-axis direction) from the first pressure portion (410) and / or the second pressure portion (420). The third pressure portion may protrude by a predetermined length (L2) from the first pressure portion (410) and / or the second pressure portion (420). For example, the pressure member (400) of FIG. 8a may be further provided with a cover capable of covering the upper sealing portion (S1) and / or the folding area (F). However, the protruding shape and protruding length of the third pressure portion are not limited by the above embodiment and may be modified in various ways.

[0144] According to the above embodiment of the present invention, venting gas or flames can be reliably blocked from moving into the space on the terrace side (T). In addition, venting through the edge portion (101) of the upper sealing portion (S1) can be suppressed.

[0145] FIG. 17 is a drawing showing a part of a battery pack according to another embodiment of the present invention viewed from the front. FIG. 18 is a drawing showing a configuration in which the lower surface of a top plate and a pressure member are separated in a battery module according to another embodiment of the present invention. FIG. 19 is a drawing showing the process of combining the lower surface of a top plate and a pressure member according to yet another embodiment of the present invention.

[0146] The top plate (210) may include at least one protruding member (211) protruding downward (-Z-axis direction) from the lower surface (210a) of the top plate (210). The protruding member (211) may be positioned between the pressing members (400).

[0147] The protruding members (211) may be provided in multiple numbers. The multiple protruding members (211) may be arranged to be spaced apart at predetermined intervals along the stacking direction (X-axis direction) of the battery cell (100). At this time, the spacing distance (G1) of the protruding members (211) may be substantially equal to or wider than the width (W2) in the X-axis direction of the pressing member (400).

[0148] Referring to FIG. 18, the protruding member (211) may be formed to extend in the longitudinal direction (Y-axis direction) of the battery cell (100). The extension length (length in the Y-axis direction) (L4) of the protruding member (211) may substantially correspond to the width length (L3) of the pressure member (400). For example, the extension length (length in the Y-axis direction) (L4) of the protruding member (211) may be substantially the same as, shorter than, or longer than the width length (L3) of the pressure member (400). A plurality of protruding members (211) may be arranged on both sides of the pressure member (400). That is, the pressure member (400) may be inserted between the protruding members (211).

[0149] According to the above embodiment of the present invention, the position of the pressurizing member (400) can be stably fixed by the protruding member (211) (effective description. Effectiveness is distinct from constitutive description). In particular, when a thermal event occurs in the battery cell (100), pressure may be applied to the pressurizing member (400). According to the above embodiment, even in a situation where such pressure is applied, the pressurizing member (400) can maintain its position stably without deviating from its position. Furthermore, according to the above embodiment, the pressurizing member (400) can be more effectively prevented from structurally rupturing due to high-temperature gas or flames.

[0150] According to one embodiment, the protruding member (211) may be configured such that the fixing force on the pressing member (400) weakens as it moves inward (central part (102)). In other words, the protruding member (211) may be configured such that the fixing force on the pressing member (400) strengthens as it moves outward (front side of FIG. 19). For example, referring to FIG. 19, the protruding member (211) may have a portion that gradually becomes further away from the pressing member (400) as it moves inward. That is, the distance (G2) of the inner end of the protruding member (211) may be wider than the width (W2) in the X-axis direction of the pressing member (400).

[0151] According to the above embodiment of the present invention, top venting for the battery cell (100) can be implemented more easily. That is, according to the above embodiment, the fixing force on the pressure member (400) is weakened as it moves toward the inner direction (central part (102)), thereby stably inducing venting of the central part (102) among the upper sealing part (S1) of the battery cell (100). On the other hand, in the above embodiment, venting occurring at the front to rear edge part (101) among the upper sealing part (S1) of the battery cell (100) can be effectively prevented.

[0152] FIG. 20 is a schematic exploded perspective view of a battery pack (10) including a battery module (10) according to one embodiment of the present invention.

[0153] Referring to FIG. 20, a battery pack (1) according to one embodiment of the present invention may include one or more battery modules (10) according to one embodiment of the present invention as described above. In addition, the battery pack (1) according to the present invention may include various other components in addition to the battery modules (10) according to the present invention. For example, the battery pack (1) according to the present invention may further include components of the battery pack (1) known at the time of filing the present invention, such as a Battery Management System (BMS), a busbar, a relay, a current sensor, etc.

[0154] Additionally, the battery pack (1) according to the present invention may further include a pack case (11), as indicated by PC in FIG. 15. This pack case (11) may provide a space in which a battery module (10) according to the present invention can be stored. In particular, when a plurality of battery modules (10) are included in the battery pack (1), the pack case (11) may have a space for dividing and storing the plurality of battery modules (10) through a cross beam or the like.

[0155] FIG. 21 is a perspective view schematically showing the configuration of a battery pack (1) according to another embodiment of the present invention.

[0156] Referring to FIG. 21, the battery pack (1) according to the present invention includes a battery module (10) according to the present invention, but does not include a separate pack case, and the module case (200) of the battery module may be configured to function as a pack case. In this case, components of the battery pack, such as a BMS, a busbar, or a relay, may be included inside the module case (200). A battery pack (1) of this type is also referred to as a cell-to-pack (CTP) in that the battery cell (100) is directly housed in the pack case. Recently, the development of such a CTP-type battery pack (1) has also been active, and the present invention may be applied to such a CTP-type battery pack (1).

[0157] FIG. 22 is a schematic perspective view of a vehicle (V) including a battery pack (1) according to one embodiment of the present invention.

[0158] Referring to FIG. 22, a vehicle (V) according to one embodiment of the present invention may include one or more battery packs (1) or battery modules (10) according to one embodiment of the present invention. The vehicle (V) according to the present invention may be, for example, an electric vehicle, a hybrid vehicle, or a plug-in hybrid vehicle. The vehicle (V) includes four-wheeled vehicles and two-wheeled vehicles. The vehicle (V) may operate by receiving power from the battery pack (1) to the battery module (10) according to one embodiment of the present invention.

[0159] Although the present invention has been described above by limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical spirit of the present invention and the equivalent scope of the claims described below by those skilled in the art to which the present invention belongs. Explanation of the symbols

[0160] V : Car 1 : Battery pack 10: Battery Module 11 : Pack case 100 : Battery cell 110 : Cell case R : Storage compartment S: Sealing part S1: Upper sealing part 101 : Edge part 102 : Central part F : Folding area T : Terrace section 111 : Page 1 112 : Page 2 120: Electrode Lead 200 : Module case 210: Top Plate 300 : Busbar Assembly 310 : Busbar terminal 320 : Busbar frame 321 : Busbar slit 400 : Pressurizing member 410: First pressurized part 420: Second pressurized part 430: Third pressurized part 440: 4th pressurized part 401 : Slit 431 : Home W1 : Width 401: First pressurized layer 402: Second pressurized layer 430 : 3rd pressurized layer 500 : Barrier absence 501: Adhesive member

Claims

Claim 1 A battery module comprising: a plurality of battery cells stacked on top of each other, each having a storage portion and a sealing portion; a module case that stores the plurality of battery cells in an internal space; and a pressure member, wherein at least one surface is positioned to face at least one surface of a terrace portion in which an electrode lead is located among the sealing portions of the battery cells, and at least another surface is positioned to face at least one surface of the module case, and configured to pressurize the terrace portion to prevent venting toward the terrace portion when the internal pressure inside the battery cell increases, and to prevent transfer to other battery cells through the empty space between the module case and the battery cells. Claim 2 A battery module according to claim 1, wherein the module case includes a top plate arranged to cover the upper side of a battery cell, and the pressing member is configured to contact the top plate. Claim 3 A battery module according to claim 1, characterized in that the pressure member is configured to surround at least a portion of the perimeter of the terrace portion. Claim 4 A battery module according to claim 1, characterized in that at least a portion of the pressure member is positioned above the sealing portion. Claim 5 A battery module according to claim 1, wherein the pressure member is configured to have a groove formed such that at least a portion of the folding area of ​​the sealing portion is inserted therein. Claim 6 A battery module according to claim 1, wherein the pressurizing member is configured such that venting occurs in the central part of the battery cell when venting gas is discharged upward from the battery cell. Claim 7 A battery module according to claim 1, characterized in that the upper portion of the pressurizing member is formed to extend toward the central portion of the battery cell. Claim 8 A battery module according to claim 1, characterized in that the pressurizing member is configured to surround all four sides of the terrace portion. Claim 9 A battery module according to claim 1, further comprising a busbar assembly located on the side of the terrace portion where the electrode lead is located among the sealing portions of the battery cell and electrically connected to the electrode lead; wherein the pressurizing member is located on the inner side of the busbar assembly. Claim 10 A battery module according to claim 1, further comprising a barrier member interposed between adjacent battery cells; wherein the pressurizing member faces at least one surface of the barrier member. Claim 11 A battery module according to claim 1, wherein the pressure member comprises an insulating or heat-resistant material. Claim 12 A battery module according to claim 1, wherein the pressurizing member comprises two or more different materials. Claim 13 A battery module according to claim 1, wherein the pressure member comprises two or more materials having different strengths. Claim 14 A battery pack comprising a battery module according to any one of claims 1 to 13. Claim 15 An automobile comprising a battery module according to any one of paragraphs 1 to 13.

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