Battery module, and battery pack and vehicle including same

Abstract

The present invention relates to a battery module comprising: a cell assembly including a plurality of battery cells; a module terminal electrically connected to the plurality of battery cells; a module case, which accommodates the cell assembly, has the module terminal provided on one side thereof, and has a first venting hole formed on the other side thereof so that gas generated in the battery cell is discharged to the outside; and a block member for guiding the gas to the first venting hole.

Description

Battery modules, battery packs containing the same, and vehicles

[0001] The present invention relates to a battery module, a battery pack including the same, and a vehicle.

[0002] This application claims priority to Korean Patent Application No. 10-2024-0008985, filed on January 19, 2024, and all contents disclosed in the specification and drawings of the said application are incorporated by reference into this application.

[0003] This application claims priority to Korean Patent Application No. 10-2024-0113576, filed on August 23, 2024, and all contents disclosed in the specification and drawings of the said application are incorporated herein by reference.

[0004] Secondary batteries, which boast high electrical properties such as high energy density and easy applicability across a wide range of product categories, are widely used not only in portable devices but also in electric vehicles (EVs) and hybrid electric vehicles (HEVs) powered by electrical power sources. These batteries are attracting attention as a new energy source for environmental friendliness and energy efficiency, not only because they can dramatically reduce fossil fuel use, but also because they produce no byproducts from energy use.

[0005] Commonly used secondary battery types today include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. When high output voltage is required, multiple battery cells are connected in series to form a battery module or battery pack. Furthermore, to increase charge / discharge capacity, multiple battery cells are connected in parallel to form a battery module or battery pack.

[0006] When connecting multiple battery cells in series or parallel to form a battery pack, it's common to first construct a battery module containing at least one battery cell, and then use this at least one battery module to add other components to form a battery pack or battery rack. Recently, battery packs in the cell-to-pack form, where multiple battery cells are housed directly in a pack housing or other device, without modularization, have also been manufactured.

[0007] However, when multiple battery modules are included within a battery pack, they can be vulnerable to thermal chain reactions between the modules. For example, if an event such as thermal runaway occurs within a single battery module, this thermal runaway can propagate to other battery modules. If the propagation of thermal runaway between battery modules is not adequately controlled, an event occurring in a specific battery module can trigger a chain reaction across multiple battery modules, potentially resulting in major problems such as explosions or fires.

[0008] Therefore, even if a thermal event occurs in a battery cell within a battery module, there is a need to develop a structure that can suppress and delay heat propagation so as to prevent gas or flames from being transferred to other cells within the battery module or to adjacent battery modules, thereby causing thermal runaway.

[0009] In addition, when a thermal runaway occurs in a battery module, there is a need to develop a structure that can quickly discharge high-temperature gases or flames generated in the battery module to the outside, thereby relieving heat accumulation inside the battery module.

[0010] Accordingly, the problem to be solved by the present invention is to provide a battery module that can quickly discharge high-temperature gases or flames generated in the battery module to the outside when thermal runaway of the battery module occurs, thereby eliminating heat accumulation inside the battery module.

[0011] Another problem to be solved by the present invention is to provide a battery pack and a vehicle including such a battery module.

[0012] However, the problems to be solved by the present invention are not limited to the problems described above, and other problems not mentioned can be clearly understood by those skilled in the art from the description of the invention described below.

[0013] In order to solve the above problem, a battery module according to one embodiment of the present invention includes: a cell assembly including a plurality of battery cells; a module terminal configured to be electrically connected to the plurality of battery cells; a module case configured to receive the cell assembly, the module terminal being provided on one side thereof and a first venting hole formed on the other side thereof so that gas generated from the battery cells is discharged to the outside; and a block member configured to guide the gas to the first venting hole.

[0014] The above first venting holes may be arranged in multiple numbers in at least one direction.

[0015] The plurality of battery cells may further include a bus bar frame having an electrode lead, a second venting hole formed on a side of the battery cell where the electrode lead is provided, and configured to be in communication with the first venting hole.

[0016] The second venting holes may be arranged in multiple numbers along the stacking direction of the battery cells.

[0017] The second venting hole may be configured to allow at least a portion of the electrode leads of the plurality of battery cells to pass through it.

[0018] The block member may be provided on the outside of the busbar frame and may include a first block member configured to suppress gas discharged from the second venting hole from moving along the stacking direction of the battery cell in the space between the busbar frame and the other side of the module case.

[0019] The first block member may be arranged in multiple numbers along the stacking direction of the battery cells.

[0020] The above first block member may be configured to extend in the height direction of the busbar frame.

[0021] The above first block member may be configured to be compressed by the busbar frame.

[0022] The above first block member may be configured to be compressed by the module case.

[0023] The above block member may have a second block member interposed between the busbar frame and the cell assembly.

[0024] The second block member may be configured to extend long along the height direction of the battery cell.

[0025] The electrode assembly is accommodated, and includes a receiving portion configured to extend in one direction and a sealing portion configured to protrude in one direction from the receiving portion, and the second block member may be provided on at least one side of the sealing portion.

[0026] The above cell assembly further includes a barrier member provided between the battery cells, and the second block member may be provided between the barrier member and the sealing portion of the battery cell.

[0027] The second block member may be configured to pressurize the inner surface of the storage portion and the busbar frame.

[0028] The second block members are arranged in multiples on one side and the other side of the battery cell, and the second block members may be provided in greater numbers on one side of the battery cell than on the other side of the battery cell.

[0029] The above battery cell may include a fixing member configured to fix the upper surface.

[0030] In addition, the present invention provides a battery pack characterized by including a battery module according to the present invention.

[0031] And, the present invention provides an automobile characterized by including a battery module according to the present invention.

[0032] According to one aspect of the present invention, high-temperature gases or flames generated from battery cells within a battery module can be quickly discharged to the outside by directional venting toward the rear side where module terminals are not provided. This ensures the safety and reliability of the battery module.

[0033] In addition, according to another aspect of the present invention, by separating the battery cells within a battery module into compartments, even if a thermal event occurs in some battery cells within the battery module, it is possible to effectively prevent or delay the transfer of gas or flames to other battery cells within the battery module and cause thermal runaway.

[0034] In addition, according to another aspect of the present invention, it is possible to prevent high-temperature gas or flames discharged to the outside of the battery module from flowing back into the inside of the battery module.

[0035] Moreover, according to another aspect of the present invention, even in a battery pack unit including a plurality of battery modules, high-temperature gas or flames can be quickly discharged to the outside of the battery pack through directional venting.

[0036] In addition, according to another aspect of the present invention, an event due to thermal runaway phenomenon, such as a fire or explosion, of a battery pack including a plurality of battery modules or a device equipped with the same can be prevented or delayed.

[0037] In addition, the present invention may have various other effects, which will be described in each embodiment configuration, or the description of effects that can be easily inferred by those skilled in the art will be omitted.

[0038] The following drawings attached to this specification illustrate preferred embodiments of the present invention, and together with the detailed description of the invention described below, serve to further understand the technical idea of ​​the present invention, and therefore, the present invention should not be interpreted as being limited to matters described in such drawings.

[0039] FIG. 1 is a front perspective view of a battery module according to one embodiment of the present invention.

[0040] FIG. 2 is a rear perspective view of a battery module according to one embodiment of the present invention.

[0041] Figure 3 is an exploded perspective view of a battery module according to one embodiment of the present invention.

[0042] FIG. 4 is a side view of a battery cell included in a battery module according to one embodiment of the present invention.

[0043] Fig. 5 is a rear cross-sectional view of a battery module according to one embodiment of the present invention. For example, Fig. 5 may be a drawing illustrating the Ⅰ-Ⅰ' cross-sectional view of Fig. 1.

[0044] FIG. 6 is a front view of a rear plate included in a battery module according to one embodiment of the present invention.

[0045] FIG. 7 is a front view of a rear side bus bar frame included in a battery module according to one embodiment of the present invention.

[0046] FIG. 8 is a drawing showing that an electrode lead of a battery cell included in a battery module according to one embodiment of the present invention is connected to a rear side bus bar frame.

[0047] FIG. 9 is a cross-sectional perspective view of a rear side busbar frame included in a battery module according to one embodiment of the invention.

[0048] FIG. 10 is an enlarged cross-sectional perspective view of a portion of a rear side busbar frame included in a battery module according to one embodiment of the invention.

[0049] FIG. 11 is a rear side cross-sectional perspective view of a battery module to which a first block member according to one embodiment of the present invention is applied.

[0050] FIG. 12 is a front view of a busbar frame included in a battery module to which a first block member according to one embodiment of the present invention is applied.

[0051] FIG. 13 is an exploded view of the rear plate in a battery module to which a first block member according to one embodiment of the present invention is applied.

[0052] Fig. 14 is a rear cross-sectional view of a battery module to which a first block member according to one embodiment of the present invention is applied. For example, Fig. 14 may be a drawing illustrating the Ⅱ-Ⅱ' cross-sectional view of Fig. 1.

[0053] FIG. 15 is an enlarged cross-sectional view of the rear side of a battery module to which a block member according to one embodiment of the present invention is applied.

[0054] FIG. 16 is a rear side internal perspective view of a battery module to which a second block member according to one embodiment of the present invention is applied.

[0055] FIG. 17 is a front side cross-sectional view of a battery module to which a second block member according to one embodiment of the present invention is applied.

[0056] FIG. 18 is a front side internal perspective view of a battery module to which a second block member according to one embodiment of the present invention is applied.

[0057] FIG. 19 is a schematic perspective view of a battery pack including a battery module according to one embodiment of the present invention.

[0058] FIG. 20 is a schematic perspective view of a vehicle including a battery pack according to one embodiment of the present invention.

[0059] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention, they should be interpreted in a way that aligns with the technical spirit of the present invention.

[0060] Accordingly, 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. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0061] Furthermore, the present invention includes various embodiments. For each embodiment, redundant descriptions of substantially identical or similar components will be omitted, and the differences will be described.

[0062] Meanwhile, in the present invention, terms indicating directions such as up, down, left, right, front, and back may be used, but it is obvious to those skilled in the art that these terms are only for convenience of explanation and may vary depending on the location of the target object or the location of the observer.

[0063] For example, in an embodiment of the present invention, the X-axis direction shown in the drawing may mean the left-right direction, the Y-axis direction may mean the front-back direction perpendicular to the X-axis direction on a horizontal plane (XY plane), that is, the length direction of the battery cell, and the Z-axis direction may mean the up-down direction (vertical direction) perpendicular to both the X-axis direction and the Y-axis direction, that is, the height direction of the battery cell.

[0064]

[0065] FIG. 1 is a front perspective view of a battery module according to an embodiment of the present invention, FIG. 2 is a rear perspective view of a battery module according to an embodiment of the present invention, and FIG. 3 is an exploded perspective view of a battery module according to an embodiment of the present invention. In addition, FIG. 4 is a side view of a battery cell included in a battery module according to an embodiment of the present invention. And, FIG. 5 is a cross-sectional view of a battery module according to an embodiment of the present invention. For example, FIG. 5 may be a drawing showing a cross-sectional view taken along line I-I' of FIG. 1.

[0066] Referring to FIGS. 1 to 5, a battery module (10) according to one embodiment of the present invention includes a cell assembly (100), a module terminal (200), a module case (300), and a block member (400).

[0067] First, referring primarily to FIG. 3, the cell assembly (100) may include a battery cell (110). The battery cell (110) may be provided in multiple numbers. In this case, the multiple battery cells (110) may be electrically connected to each other.

[0068] A plurality of battery cells (110) may be stacked along one direction. For example, as illustrated in FIG. 3, a plurality of battery cells (110) may be arranged in a vertical direction (Z-axis direction) and in a parallel manner in the left-right direction (X-axis direction).

[0069] More specifically, referring to FIG. 4, a plurality of battery cells (110) may include an electrode assembly and a cell case (111) that accommodates the electrode assembly. The cell case (111) may be a laminate sheet including a resin layer and a metal layer.

[0070] Additionally, a plurality of battery cells (110) may each be provided with an electrode lead (112). The electrode lead (112) is connected to the electrode assembly and may be extended to the outside of the cell case (111) to function as an electrode terminal.

[0071] The electrode leads (112) may be provided in pairs, and the pair of electrode leads (112) may be drawn out from both ends of the battery cell (110), i.e., in the longitudinal direction (±Y direction). At this time, the pair of electrode leads (112) may be a positive lead and a negative lead.

[0072] Meanwhile, the present invention is not limited by the specific type or shape of the battery cell (110), and various battery cells (110) known at the time of filing of the present invention may be employed to configure the battery module (10) of the present invention. In the present embodiment, a pouch-type secondary battery having a high energy density and easy stacking is targeted as shown in the drawing, but it goes without saying that a cylindrical or square secondary battery may be applied as the battery cell (110).

[0073] The module terminal (200) may be configured to be electrically connected to a plurality of battery cells (110). The module terminal (200) may include a positive terminal and a negative terminal. In addition, the module terminal (200) may be configured to be electrically or communicatively connected to a control device such as a BMS.

[0074] Referring to FIGS. 1 to 3, a module case (300) may be configured to accommodate a cell assembly (100). Specifically, a receiving space may be formed in the module case (300), and the cell assembly (100) may be accommodated in the receiving space. The module case (300) may be configured to be made of a metal material having rigidity and heat resistance to physically or chemically protect the accommodated cell assembly (100).

[0075] Such a module case (300) may be provided with a module terminal (200) on one side. For example, as in the embodiment illustrated in FIG. 1, the module terminal (200) may be provided on the front of the module case (300).

[0076] In addition, a first venting hole (H1) may be formed in the module case (300). The first venting hole (H1) may be configured to allow venting gas generated in the battery cell (110) to be discharged to the outside of the module case (300). In particular, the first venting hole (H1) may be formed on the other side of the module case (300), and here, the other side of the module case (300) may mean the opposite side of one side of the module case (300) where the module terminal (200) is provided. That is, the module terminal (200) and the first venting hole (H1) may be provided on opposite sides. For example, as in the embodiment illustrated in FIG. 2, the first venting hole (H1) may be formed on the rear side of the module case (300).

[0077] Accordingly, directional venting in one direction may be possible in the battery module (10) according to one embodiment of the present invention. For example, as illustrated in FIGS. 1 to 5, directional venting toward the rear of the battery module (10) may be possible through the first venting hole (H1).

[0078] In this way, the first venting hole (H1) provided on the rear of the module case (300) can be provided so that, when thermal runaway of the battery module (10) occurs, gas or flame generated inside the battery module (10) can be discharged to the outside of the battery module (10). The remaining portion of the module case (300) excluding the first venting hole (H1) is sealed, and the gas or flame can be discharged in a straight line toward the first venting hole (H1).

[0079] According to the above-described embodiment of the present invention, even if a thermal event occurs at any location of the battery cell (110), the gas or flame generated in the battery cell (110) is discharged to the outside of the battery module (10) through specific first venting holes (H1) provided at the rear of the battery cell (110), thereby facilitating venting.

[0080] Referring to FIGS. 1 to 5, the block member (400) may be configured to guide gas or flame to the first venting hole (H1). In particular, the block member (400) may be configured to suppress venting gas or flame from being discharged to a side where the first venting hole (H1) is not provided.

[0081] The block member (400) may be provided inside the module case (300). Specifically, the block member (400) may be provided between the module case (300) and the cell assembly (100). The block member (400) may guide gas flowing in the space formed between the module case (300) and the cell assembly (100) toward the first venting hole (H1).

[0082] According to the above-described embodiment of the present invention, when a thermal event occurs in a battery cell (110) within a battery module (10), venting gas and the like can be discharged only in one target direction, for example, in the direction in which the first venting hole (H1) is formed, as indicated by the arrow in FIG. 5. That is, since the surrounding area except for the first venting hole (H1) is all blocked based on the block member (400), directional venting of the venting gas can be more effectively induced toward the first venting hole (H1).

[0083] Thus, according to the present embodiment, the venting gas can be quickly guided to the first venting hole (H1) and discharged to the outside. That is, according to the above embodiment of the present invention, heat accumulation within the battery module (10) can be prevented or suppressed. Thus, the safety and reliability of the battery module (10) can be guaranteed.

[0084] Furthermore, the block member (400) may be configured to divide a plurality of spaces through which gas or the like may flow. The block member (400) may be configured to inhibit the movement of venting gas into adjacent venting spaces. That is, the block member (400) may be configured to separate the venting paths for each of the battery cells (110).

[0085] For example, as in the embodiment illustrated in FIG. 5, the block member (400) may be configured to suppress venting gas, etc. generated in groups of two battery cells (110) from moving toward other groups of battery cells (110). At this time, the groups of battery cells (110) may be configured to have a capacity of approximately 230 to 300 Ah.

[0086] According to the above-described embodiment of the present invention, since a space in which gas or the like can flow is defined, when a thermal event occurs in a battery cell (110), venting gas or flame or the like is prevented from being transferred to an adjacent battery cell (110), so that thermal runaway propagation between battery cells (110) can be effectively prevented or delayed.

[0087] This block member (400) may include an elastic material such as silicone. Accordingly, the block member (400) may be compressed by components within the battery module (10). According to the above-described exemplary configuration of the present invention, the space through which gas or the like may flow is more reliably sealed, so that directional venting toward the first venting hole (H1) can be more effectively induced. In addition, the block member (400) may have at least one of flame retardancy and fire resistance.

[0088]

[0089] Meanwhile, referring to FIGS. 1 to 3, the module case (300) may include a case body (310), a front plate (320), and a rear plate (330).

[0090] Specifically, as illustrated in the drawings of the present invention, the case body (310) may be provided as a U-frame. When the case body (310) is provided as a U-frame, it may be provided to cover both sides and the lower surface of the cell assembly (100). The case body (310) may include a left plate and a right plate covering both sides of the cell assembly (100), and a lower plate covering the lower surface of the cell assembly (100). In addition, the left plate, the right plate, and the lower plate may be configured in an integrated form. At this time, the upper surface and the front and rear surfaces of the case body (310) may be open.

[0091] When the case body (310) is equipped with a U-frame, it may further include a top plate that is coupled to the open upper surface of the case body (310). The top plate may be welded to the case body (310) and coupled to each other. At this time, the shape in which the top plate and the case body (310) are coupled may be a square tubular shape with open front and back surfaces.

[0092] In addition, the module case (300) may be formed in various other shapes. For example, the module case (300) may be provided as a monoframe. For example, the case body (310) may be configured in the shape of a square tube having an upper surface, a lower surface, a left surface, and a right surface, and having an open front and back surface.

[0093] The front plate (320) and the rear plate (330) may be provided on the open front and rear sides of the case body (310), respectively. The front plate (320) and the rear plate (330) may be welded and joined to the case body (310). Alternatively, the front plate (320) and the rear plate (330) may be formed integrally with the case body (310).

[0094] According to one embodiment of the present invention, the front plate (320) may be provided with a module terminal (200). The front plate (320) may be partially provided with holes or slits for exposing components that require external exposure, such as the module terminal (200) or connector of the battery module (10).

[0095] Additionally, a first venting hole (H1) may be formed in the rear plate (330). Accordingly, venting gas, etc. generated when a thermal event occurs in the battery cell (110) may be discharged to the rear of the battery module (10) through the first venting hole (H1).

[0096] Meanwhile, the front plate (320) and the rear plate (330) may have an inner surface made of an insulating material and an outer surface made of a metal material, for example.

[0097]

[0098] Meanwhile, referring to FIG. 2, a battery module (10) according to one embodiment of the present invention may further include a cooling plate (700).

[0099] The cooling plate (700) may be interposed between the cell assembly (100) and the module case (300). For example, referring to FIG. 2, the cooling plate (700) may be provided on one side of the cell assembly (100), for example, between the lower portion of the cell assembly (100) and the lower surface of the module case (300).

[0100] Meanwhile, in the drawings of this specification, the configuration in which the cooling plate (700) is positioned on the lower side of the battery module (10) has been described, but the cooling plate (700) may be positioned on another side, such as the upper side of the battery module (10). In addition, the cooling plate (700) may be positioned on two or more side surfaces of the battery module (10). For example, the cooling plate (700) may be provided on the upper side and the lower side of the cell assembly (100), respectively.

[0101] The cooling plate (700) may be configured to transfer heat between the cell assembly (100) and the module case (300). The battery cell (110) may generate heat during use, and if this heat is not properly discharged, the performance of the battery cell (110) cannot be stably guaranteed, and in severe cases, it may lead to thermal runaway, ignition, explosion, etc. of the battery cell (110). In this regard, the heat generated in the battery cell (110) needs to be properly discharged to the outside through the module case (300). At this time, the cooling plate (700) can ensure that the heat transfer between the battery cell (110) and the module case (300) is well performed, thereby stably securing the cooling performance for the battery module (10).

[0102] The cooling plate (700) may include a material capable of transferring heat. In particular, the cooling plate (700) may be made of a resin material, and in this case, the cooling plate (700) may be referred to as a thermal resin. The cooling plate (700) may include at least one of various materials, such as urethane, silicone, and epoxy. The cooling plate (700) may be expressed by other terms such as TIM (Thermal Interface Material), potting resin, etc., and as the material of the cooling plate (700) of the battery module (10) according to the present invention, various thermally conductive adhesives or TIMs known at the time of filing of the present invention may be used.

[0103] The cooling plate (700) may be interposed between all battery cells (110) provided in the cell assembly (100) and the module case (300). That is, the cooling plate (700) may be configured to be in direct contact with all battery cells (110) included in the cell assembly (100). According to this embodiment of the present invention, heat dissipation through the cooling plate (700) can be achieved for all battery cells (110) included in the battery module (10). Therefore, the overall cooling performance of the battery module (10) can be further improved.

[0104] In addition, the cooling plate (700) may be configured to fix the cell assembly (100) to the module case (300). To this end, the cooling plate (700) may include an adhesive component. For example, as illustrated in FIG. 2, when the cooling plate (700) is positioned at the bottom of the cell assembly (100), the cooling plate (700) may adhesively fix the lower side of the cell assembly (100) to the lower surface of the module case (300).

[0105] These cooling plates (700) can be applied to the lower surface of the module case (300) before the cell assembly (100) is accommodated in the module case (300) and then cured over time.

[0106]

[0107] FIG. 6 is a front view of a rear plate included in a battery module according to one embodiment of the present invention.

[0108] Referring to Fig. 6, a plurality of first venting holes (H1) may be provided. The first venting holes (H1) may be arranged in at least one direction. The first venting holes (H1) may be arranged along a plurality of rows. For example, as illustrated in Fig. 6, the first venting holes (H1) are arranged in a row along the height direction of the rear plate (330), and the plurality of first venting holes (H1) arranged in a row may be arranged in a plurality of rows along the stacking direction of the battery cells (110), i.e., the width direction of the rear plate (330). These plurality of first venting holes (H1) may be provided at regular intervals from each other.

[0109] According to the above-described embodiment of the present invention, no matter where a thermal event occurs in the battery cell (110), the venting gas or flame can be smoothly discharged to the outside of the battery module (10) through specific first venting holes (H1) provided at the rear of the battery cell (110).

[0110]

[0111] FIG. 7 is a front view of a rear-side busbar frame included in a battery module according to one embodiment of the present invention, and FIG. 8 is a drawing showing that electrode leads of battery cells included in a battery module according to one embodiment of the present invention are connected to the rear-side busbar frame. In addition, FIG. 9 is a cross-sectional perspective view of a rear-side busbar frame included in a battery module according to one embodiment of the present invention, and FIG. 10 is an enlarged cross-sectional perspective view of a portion of a rear-side busbar frame included in a battery module according to one embodiment of the present invention.

[0112] Referring further to FIGS. 7 to 10 along with FIG. 3, the battery module (10) of the present invention may further include a busbar frame (500). The busbar frame (500) may be provided inside the module case (300) and configured to cover at least one side of the cell assembly (100).

[0113] The busbar frame (500) may be positioned on the side where the electrode leads (112) of the battery cell (110) are provided. For example, as illustrated in FIG. 2, the electrode leads (112) may be positioned on the front and rear sides of the battery cell (110), and the busbar frame (500) may be coupled to the front and rear of the cell assembly (100).

[0114] Accordingly, the busbar frame (500) may include a front side busbar frame (500a) and a rear side busbar frame (500b). The busbar frame (500) may be formed of a material having electrical insulation properties, such as a plastic material.

[0115] Referring to FIGS. 7 to 10, a second venting hole (H2) may be formed in the busbar frame (500). For example, as illustrated in the drawings of the present invention, the second venting hole (H2) may be formed in the rear-side busbar frame (500b).

[0116] According to the above-described embodiment of the present invention, since the front side bus bar frame (500a) is not provided with a second venting hole (H2), the venting gas or flame, etc. can be more smoothly guided to be discharged in one direction, particularly to the rear.

[0117] The second venting hole (H2) may be configured to be in communication with the first venting hole (H1). The second venting hole (H2) may be provided to at least partially face the first venting hole (H1). The first venting hole (H1) and the second venting hole (H2) may be arranged along a substantially straight line.

[0118] According to the above-described embodiment of the present invention, venting gas or flames, etc. can be discharged to the outside in a substantially straight line through the first venting hole (H1) and the second venting hole (H2). As a result, venting gas or flames, etc. can be discharged to the outside of the battery module (10) more quickly.

[0119]

[0120] Meanwhile, referring to FIGS. 7 and 8, the busbar frame (500) may be provided with a lead slot (510). The lead slot (510) may be provided so that at least a portion of the electrode leads (112) of a plurality of battery cells (110) may pass through it. The lead slot (510) may be provided so that the plurality of electrode leads (112) may pass through it in the +Y-axis or -Y-axis direction (front-back direction).

[0121] A plurality of lead slots (510) may be provided so as to be spaced apart from each other along the stacking direction (X-axis direction) of the battery cells (110). At this time, a plurality of electrode leads (112) passing through the lead slots (510) may be provided so as to be folded and stacked on each other. By this stacking structure, a plurality of battery cells (110) whose electrode leads (112) are in contact with each other may be electrically connected to each other.

[0122] Also, referring to FIG. 8, a battery module (10) according to one embodiment of the present invention may include a plurality of bus bars (600). The plurality of bus bars (600) may be configured to connect battery cells (110) in series and / or in parallel.

[0123] A bus bar (600) may be provided between a plurality of lead slots (510). Thus, the bus bar (600) may be configured to be in direct contact with the electrode leads (112) passing through the lead slots (510). Specifically, the electrode leads (112) of the battery cells (110) pass through the lead slots (510) of the bus bar frame (500) and are drawn outward from the bus bar frame (500), and the portion drawn out in this manner may be attached to the surface of the bus bar (600) by welding or the like.

[0124] The bus bar (600) may be made of a metal material such as copper, aluminum, nickel, etc. In addition, the bus bar (600) may be made in the shape of a bar extending in the height direction.

[0125] The busbar (600) may be attached to the outer surface of the busbar frame (500). For this purpose, the busbar frame (500) may include a busbar connecting portion (520). In addition, the busbar (600) may be positioned on the inner side of the electrode lead (112). That is, the busbar (600) may be positioned between the bent electrode lead (112) and the busbar frame (500).

[0126] At this time, as in the embodiment illustrated in FIG. 8, one laminated electrode lead (112) and one bus bar (600) may be provided for each bus bar joint (520).

[0127] Meanwhile, referring to FIGS. 7 to 10, a plurality of second venting holes (H2) may be provided. The plurality of second venting holes (H2) may be arranged along at least one direction. For example, the plurality of second venting holes (H2) may be arranged in a row along the height direction of the busbar frame (500b). These second venting holes (H2) may be configured to be connected to each other, as illustrated in FIG. 7. Accordingly, the second venting holes (H2) may be provided in a form that extends long along the height direction of the busbar frame (500b). At this time, the second venting holes (H2) may be configured in a rib shape when the rear busbar frame (500b) is viewed from the front.

[0128] Additionally, a plurality of second venting holes (H2) may be arranged along the stacking direction of the battery cells (110). More specifically, the second venting holes (H2) may be formed between the bus bar connecting portions (520). That is, the second venting holes (H2) may be arranged between the electrode leads (112) and the bus bars (600) that are stacked together.

[0129] In addition, some of the second venting holes (H2) among the plurality of second venting holes (H2) may be provided to be integrated with the lead slot (510). That is, the second venting holes (H2) may be configured to allow at least some of the electrode leads (112) of the plurality of battery cells (110) to pass through them.

[0130] Among the plurality of second venting holes (H2), the remaining second venting holes (H2) may be provided at a predetermined distance from the lead slot (510). These remaining second venting holes (H2) may be configured to allow only a fluid such as a venting gas to pass through them.

[0131] Meanwhile, referring to FIGS. 9 and 10, the second venting hole (H2) may be configured to be partially open not only in the forward-rear direction but also in the left-right direction. Accordingly, as indicated by the arrows in FIG. 9, venting gas or flames generated in the battery cell (110) may be discharged not only to the rear along the electrode lead (112) but also to both sides in the left-right direction from the second venting hole (H2) and may move more quickly to the first venting hole (H1).

[0132] And, referring to FIG. 9, the electrode lead (112) that passes through the lead slot (510) or the second venting hole (H2) provided on the outermost side of the busbar frame (500) may be configured to be pressed toward the busbar (600) by the busbar frame (500). That is, the electrode lead (112) may be configured to be pressed inward by the rib shape of the busbar frame (500).

[0133] According to the above-described embodiment of the present invention, when a plurality of electrode leads (112) in contact with the bus bar (600) are stacked on each other, the electrode leads (112) and the bus bar (600) can be in contact more stably, so that the electrical connection between the electrode leads (112) and the bus bar (600) can be made more stably.

[0134]

[0135] FIG. 11 is a rear side cross-sectional perspective view of a battery module to which a first block member is applied according to one embodiment of the present invention, and FIG. 12 is a front view of a busbar frame included in a battery module to which a first block member is applied according to one embodiment of the present invention.

[0136] Referring to FIGS. 11 and 12, the block member (400) may include a first block member (410). The first block member (410) may be provided on the outer side of the busbar frame (500). For example, the first block member (410) may be provided in the space between the rear side busbar frame (500b) and the rear plate (330).

[0137] This first block member (410) may be configured to suppress gas discharged from the second venting hole (H2) from moving along the stacking direction of the battery cells (110) in the space between the busbar frame (500) and the other side of the module case (300). That is, the first block member (410) may be configured to suppress gas from moving along the stacking direction (left-right direction) of the battery cells (110) in the space between the rear-side busbar frame (500b) and the rear plate (330).

[0138] According to the above-described embodiment of the present invention, since the venting gas and the like can be suppressed from moving along the stacking direction of the battery cells (110) by the first block member (410), heat transmission between the battery cells (110) can be suppressed or prevented. In addition, since the first block member (410) can guide the venting gas and the like toward the first venting hole (H1), directional venting of the venting gas and the like can be more reliably induced.

[0139] More specifically, a plurality of first block members (410) may be provided. A plurality of first block members (410) may be arranged to be spaced apart from each other along the stacking direction of the battery cells (110), i.e., the left-right direction of the busbar frame (500b). For example, as in the embodiment illustrated in FIG. 10, the first block members (410) may be provided between electrode leads (112) configured to be stacked on each other. Alternatively, the first block members (410) may be provided between adjacent busbars (600). That is, the first block members (400) may be provided in a space formed between busbar connecting portions (520).

[0140] Accordingly, a plurality of spaces separated from each other may be formed between adjacent first block members (410) among a plurality of first block members (410). At least one first venting hole (H1) may be positioned between adjacent first block members (410). For example, according to the embodiment illustrated in FIG. 12, two first venting holes (H1) may be positioned between adjacent first block members (410).

[0141] In addition, the first block member (410) may be provided on the outside of the second venting hole (H2). Accordingly, the first block member (410) may be configured to at least partially face the second venting hole (H2). At the same time, the first block member (410) may be configured to be spaced apart from the second venting hole (H2) by a predetermined distance. Accordingly, the path of venting gas or flames discharged through the second venting hole (H2) may not be obstructed.

[0142] According to the above-described embodiment of the present invention, when a thermal event occurs in a battery cell (110), venting gas or flame, etc. discharged through the second venting hole (H2) can be guided to be discharged only to the space located at the rear side of the battery cell (110) and the first venting hole (H1) by the first block member (410). As a result, the venting gas or flame, etc. can be quickly directional vented to the first venting hole (H1).

[0143] In addition, according to the above-described embodiment of the present invention, venting gas or flames, etc. can be suppressed from moving beyond the first block member (410) to another space. Accordingly, even if a thermal event occurs in a battery cell (110), venting gas or flames, etc. can be suppressed or prevented from moving to another battery cell (110) and causing heat propagation.

[0144] That is, the first block member (410) may be configured to separate the venting paths of the battery cells (110). For example, as in the embodiment illustrated in FIG. 11, the first block member (410) may be configured to suppress venting gas, etc. generated in groups of four battery cells (100) from moving toward other groups of battery cells (100).

[0145] Additionally, the first block member (410) may be configured to extend in the height direction of the busbar frame (500b). Referring to FIG. 12, the height of the first block member (410) may be configured to correspond to the height of the rear-side busbar frame (500b).

[0146] According to the above-described embodiment of the present invention, the first block member (410) can more reliably separate the space along the height direction of the busbar frame (500b). This makes it possible to more reliably prevent venting gas and the like from moving to another space where another adjacent battery cell (110) is located.

[0147]

[0148] In addition, the first block member (410) may include a material having elasticity. In addition, the first block member (410) may include a material having high heat resistance. In addition, the first block member (410) may include a material having high flame resistance. In addition, the first block member (410) may include a material having electrical insulation properties. For example, the first block member (410) may include a silicone material.

[0149] Moreover, referring to FIG. 11, the first block member (410) can be configured to be compressed by the busbar frame (500b).

[0150] Specifically, referring to FIG. 11, the rear side busbar frame (500b) may further include a protrusion (530). The protrusion (530) may be configured such that at least a portion of the outer surface of the busbar frame (500b) protrudes outward. At this time, the protrusion (530) may be provided to extend further outward than the outer surface of the busbar connecting portion (520). In addition, the protrusion (530) may be formed to extend in a straight line along the height direction of the first block member (410). This protrusion (530) may be provided between adjacent second venting holes (H2).

[0151] These protrusions (530) may be configured to pressurize the first block member (410). The number of protrusions (530) may correspond to the number of first block members (410). Accordingly, the first block member (410) may be configured in a form in which at least a portion thereof is sunken by the protrusions (530). In this case, the first block member (410) may be provided in close contact with the busbar frame (500b) without a gap.

[0152] According to this embodiment of the present invention, since the protrusion (530) is configured to compress the first block member (410), there may be no gap between the busbar frame (500b) and the first block member (410), so that the first block member (410) can more reliably partition the spaces between the busbar frame (500b) and the rear plate (330). As a result, when thermal runaway propagation occurs in the battery module (10), thermal runaway propagation between battery cells (110) can be effectively prevented or delayed.

[0153]

[0154] Fig. 13 is an exploded view of the rear plate of a battery module to which a first block member is applied according to one embodiment of the present invention, and Fig. 14 is a rear cross-sectional view of the battery module to which a first block member is applied according to one embodiment of the present invention. For example, Fig. 14 may be a drawing illustrating the Ⅱ-Ⅱ' cross-sectional view of Fig. 1.

[0155] Moreover, the first block member (410) may be configured to be compressed by the module case (300). The first block member (410) may be configured to be pressed in the front-rear direction by the busbar frame (500b) and the rear plate (330). As a result, the first block member (410) is brought into close contact with the busbar frame (500b) and the rear plate (330), so that venting gas or flames, etc., may be suppressed from moving between the busbar frame (500b) or the rear plate (330) and the first block member (410).

[0156] Specifically, the first block member (410) may be configured to be compressed to match the shape of the inner surface of the rear plate (330). The inner surface of the rear plate (330) may be configured to correspond to the shape of the busbar frame (500b). For example, as in the embodiment illustrated in FIG. 14, the upper portion of the rear plate (330) where the busbar (600) is not provided may be configured to have a shape that protrudes inwardly. Accordingly, the first block member (410) may also be configured to have an upper portion that is recessed inwardly to correspond to the shape of the inner surface of the rear plate (330).

[0157] According to the above-described embodiment of the present invention, the first block member (410) can be compressed and coupled to correspond to the shape of the space between the rear plate (330) and the busbar frame (500b). As a result, the space between the busbar frame (500b) and the rear plate (330) can be more reliably separated by the first block member (410). In addition, according to the above-described embodiment of the present invention, since the first block member (410) is stably fixed by the busbar frame (500b) and the rear plate (330), bending deformation of the first block member (410) can be suppressed. Therefore, even if a thermal event occurs, the possibility of high-temperature, high-pressure venting gas or flames being transferred to another space while pushing out the first block member (410) can be reduced.

[0158] Accordingly, according to the above-described embodiment of the present invention, even if a thermal event occurs in any battery cell (110), the movement of venting gas or flames to other battery cells (110) and heat propagation can be reliably suppressed or prevented.

[0159]

[0160] Fig. 15 is an enlarged cross-sectional view of the rear side of a battery module to which a block member is applied according to an embodiment of the present invention, and Fig. 16 is a rear-side internal perspective view of a battery module to which a second block member is applied according to an embodiment of the present invention. In addition, Fig. 17 is a front-side cross-sectional view of a battery module to which a second block member is applied according to an embodiment of the present invention, and Fig. 18 is a front-side internal perspective view of a battery module to which a second block member is applied according to an embodiment of the present invention.

[0161] Referring to FIGS. 15 to 18, the block member (400) may include a second block member (420). The second block member (420) may be configured to induce venting gas or flames, etc., to be discharged in one direction, particularly toward the rear. In addition, the second block member (420) may be configured to suppress venting gas or flames, etc., from being discharged in a direction other than the rear, particularly toward the front.

[0162] The second block member (420) may be provided on the inner side of the first block member (410). That is, the second block member (420) may be provided closer to the battery cell (110) side than the first block member (410).

[0163] Specifically, the second block member (420) may be interposed between the busbar frame (500) and the cell assembly (100). The second block member (420) may be interposed at the front and / or rear side of the cell assembly (100). The second block member (420) may be provided only at the front side of the cell assembly (100) or may be interposed at both the front and rear sides of the cell assembly (100). More specifically, the second block member (420) may be positioned at the front and / or rear side of the battery cell (110).

[0164] In addition, the second block member (420) may include a material having elasticity. In addition, the second block member (420) may include a material having high heat resistance. In addition, the second block member (420) may include a material having high flame resistance. In addition, the second block member (420) may include a material having electrical insulation properties. For example, the second block member (420) may include a silicone material.

[0165] According to the above-described embodiment of the present invention, since the second block member (420) is provided, venting gas or flames, etc. can be induced to be discharged to the outside only in one direction, particularly through the first venting hole (H1) provided on the rear side of the battery module (10).

[0166] In addition, the second block member (420) may be configured to extend along the height direction of the battery cell (110). The second block member (420) may be configured to extend as much as the height of the storage portion (111a) of the battery cell (110).

[0167] According to the above-described embodiment of the present invention, the second block member (420) can more reliably block the movement of venting gas or flame along the height direction of the battery cell (110). As a result, the movement of venting gas or the like to other adjacent battery cells (110) and heat propagation can be suppressed.

[0168]

[0169] The second block member (420) may be provided in multiple pieces. The multiple second block members (420) may be arranged along the stacking direction of the battery cells (110), i.e., the left-right direction. The second block members (420) may be provided between the battery cells (110).

[0170] Meanwhile, referring to FIG. 4, when the battery cell (110) of the present invention is provided as a pouch-type battery cell, the cell case (111) may include a storage portion (111a) and a sealing portion (111b).

[0171] The receiving portion (111a) may be configured to receive an electrode assembly. The receiving portion (111a) has an internal space with a concave surface facing the electrode assembly (100), and the electrode assembly (100) may be mounted in this internal space. In the embodiment illustrated in FIG. 4, the receiving portion (111a) may have a double cup shape formed on both sides of the cell case (111).

[0172] The storage portion (111a) may be configured to extend in one direction. That is, the storage portion (111a) may be configured to extend in the longitudinal direction of the battery cell (110).

[0173] The periphery of the storage portion (111a) may be heat-sealed to form a sealing portion (111b). That is, the sealing portion (111b) may be formed by sealing the outer periphery of the storage portion (111a). As in the embodiment illustrated in FIG. 4, the sealing portion (111b) may be provided on three of the four sides of the battery cell (110).

[0174] At this time, the sealing portion (111b) may be configured to protrude in one direction from the receiving portion (111a). The sealing portion (111b) may be configured to protrude further than the receiving portion (111a) in one direction. At the end of the battery cell (110), the receiving portions (111a) may be provided in close contact with each other, and a predetermined space may be formed between the sealing portions (111b).

[0175] Additionally, the electrode lead (112) may be configured to protrude toward the front and / or rear side of the storage portion (111a) or sealing portion (111b) of the battery cell (110).

[0176] Meanwhile, the battery cell (110) may be provided in an upright state with the surface that does not include the sealing portion (111b) facing downward. As illustrated in FIG. 3, a plurality of battery cells (110) may be arranged in a vertical direction (Z-axis direction) and in a parallel manner in the left-right direction (X-axis direction). At this time, each battery cell (110) may have the sealing portion (111b) facing forward-backward (Y-axis direction) and upward (+Z-axis direction), and the storage portion (111a) facing left-right (X-axis direction).

[0177] The second block member (420) may be provided on at least one side of the sealing portion (111b). That is, at least one side of the second block member (420) may be configured to be in contact with the sealing portion (111b). In other words, the second block member (420) may be configured to be in contact with the front and / or rear side of the receiving portion (111a) and at the same time be in contact with the sealing portion (111b). According to the above-described embodiment of the present invention, the second block member (420) may fix the sealing portion (111b).

[0178] Additionally, the second block member (420) may be provided in contact with the front and / or rear sides of the receiving portion (111a). Additionally, one side of the second block member (420) may be configured to contact the receiving portion (111a), and the other side may be configured to contact the bus bar frame (500).

[0179]

[0180] Meanwhile, referring to FIGS. 3, 15, and 16, the cell assembly (100) of the battery module (10) according to one embodiment of the present invention may include a barrier member (120). The barrier member (120) may be provided between battery cells (110) and configured to partition between a plurality of battery cells (110). In particular, at least one barrier member (120) may be included in one battery module (10). A plurality of barrier members (120) may be provided along one direction in which the battery cells (110) are arranged.

[0181] The barrier member (120) may be provided in a form in which it is arranged for at least one battery cell (110). In addition, the barrier member (120) may be configured to be in contact with the busbar frame (500).

[0182] For example, as illustrated in FIG. 15, in a battery module (10) according to one embodiment of the present invention, a barrier member (120) may be placed for every two battery cells (110). Accordingly, the battery cells (110) may be divided into two compartments by the barrier member (120).

[0183] The barrier member (120) may be provided as an insulating pad thinner than the battery cell (110). The barrier member (120) may be provided with a material having excellent heat resistance and / or fire resistance. Alternatively, the barrier member (120) may be provided in the form of a compressible pad, for example, with a material such as silicone or aerogel.

[0184] According to the above-described embodiment of the present invention, the battery cells (110) can be partitioned or separated to prevent gas or flames from flowing to other adjacent barrier members (120) and heat from being transmitted to other battery cells (110). In addition, according to the above-described embodiment of the present invention, the barrier member (120) can contribute to the structural rigidity of the battery cells (110) by compressing the battery cells (110) when the battery cells (110) are swollen.

[0185] The barrier member (120) may be configured to extend in the front-back direction and protrude beyond the sealing portion (111b) in the front-back direction. That is, the length of the barrier member (120) may be provided to be longer than the length of the battery cell (110). In addition, the barrier member (120) may be configured to contact the inner surface of the busbar frame (500).

[0186] At this time, the second block member (420) may be provided between the barrier member (120) and the battery cell (110). The second block member (420) may be provided between the barrier member (120) and the sealing portion (111b). One side of the second block member (420) may be configured to contact the end portion of the barrier member (120), and the other side may be configured to contact the sealing portion (111b) of the battery cell (110).

[0187] The second block member (420) may be provided on both sides of the barrier member (120). The second block member (420) may be configured to compress the barrier member (120) from both sides. That is, the second block member (420) may compress the barrier member (120) in the left-right direction. As a result, the position of the barrier member (120) may be fixed. In addition, the barrier member (120) may be prevented from being bent or deformed by the second block member (420).

[0188] According to the above-described embodiment of the present invention, even if a thermal event occurs, the possibility of high-temperature, high-pressure venting gas or flames being transferred to another space while pushing out the end portion of the barrier member (120) can be reduced. Accordingly, according to the above-described embodiment of the present invention, even if a thermal event occurs in a certain battery cell (110), the venting gas or flames can be reliably suppressed or prevented from moving to another battery cell (110) and causing heat propagation.

[0189] Additionally, a second venting hole (H2) may be positioned between adjacent second block members (420). Accordingly, venting gas or flames generated in the battery cells (110) between adjacent second block members (420) may be discharged to the outside of the battery module (10) through the second venting hole (H2).

[0190] As an example, in the embodiment illustrated in FIGS. 15 and 16, two battery cells (110) are provided between two adjacent barrier members (120), and each of the two barrier members (120) may be provided with a second block member (420) on both sides of the rear side. In addition, a second venting hole (H2) may be provided between the second block members (420) provided on the inside of the two barrier members (120). That is, the venting path for each of some battery cells (110) may be separated from the inside of the busbar frame (500) by the second block member (420).

[0191] According to the above-described embodiment of the present invention, gas or flame emitted from a battery cell (110) interposed between adjacent barrier members (120) can be discharged to the outside of the module case (300) only through the second venting hole (H2) located between the adjacent second block members (420).

[0192] As a specific example, referring to the bold arrows illustrated in FIG. 15, when a thermal event occurs in any one of the battery cells (110) interposed between the barrier members (120) to generate gas or flame, the gas or flame may be guided to the second venting hole (H2) by the second block member (420). In addition, the gas or flame may move to the space between the busbar frame (500b) and the rear plate (330) and be guided toward the first venting hole (H1) by the first block member (410) to be immediately discharged to the outside.

[0193] According to the above-described embodiment of the present invention, since the venting path can be separated by not only the first block member (410) but also the second block member (420), venting gas, etc. generated in some grouped battery cells (100) can be suppressed from moving toward other groups of battery cells (100). As a result, thermal runaway propagation to other adjacent battery cells (110) can be prevented.

[0194]

[0195] Meanwhile, the second block member (420) may be configured to be fixed to the inner surface of the busbar frame (500). For example, the second block member (420) may be attached to the inner surface of the busbar frame (500). Accordingly, the second block member (420) may be configured to contact the receiving portion (111a) and the busbar frame (500) in the front-back direction, and the sealing portion (111b) and / or the barrier member (120) in the left-right direction.

[0196] At this time, the second block member (420) may be configured to receive a compressive force from all sides. For example, the second block member (420) may be interposed in a compressed state by the receiving portion (111a), the sealing portion (111b), the busbar frame (500), and / or the barrier member (120). The second block member (420) may be configured to pressurize the inner surface of the receiving portion (111a) and the busbar frame (500).

[0197] According to the above-described embodiment of the present invention, as the second block member (420) is compressed and interposed in the front-rear direction, the second block member (420) can be more closely attached to the inner surface of the receiving portion (111a) and the busbar frame (500). Accordingly, the space formed by the second block member (420) is further sealed, so that venting gas or flames, etc. can be prevented from moving beyond the second block member (420) to the space where other battery cells (110) are located.

[0198]

[0199] Meanwhile, referring to FIGS. 15 to 18, a plurality of second block members (420) may be arranged on one side and the other side of the battery cell (110). Here, one side of the battery cell (110) may mean the front side of the battery cell (110), and the other side may mean the rear side of the battery cell (110).

[0200] At this time, the second block member (420) may be provided in greater numbers on one side of the battery cell (110) than on the other side of the battery cell (110). That is, the second block member (420) may be provided at a higher density on the front side of the battery cell (110) than on the rear side of the battery cell (110).

[0201] For example, as in the embodiment illustrated in FIGS. 17 and 18, on the front side of the battery module (10), the second block member (420) may be provided between each sealing portion (111b) of the battery cell (110). That is, the second block member (420) may be interposed in both the space between the front side sealing portions (111b) of adjacent battery cells (110) and the space between the barrier member (120) and the front side sealing portion (111b).

[0202] In addition, the second block member (420) can provide a force to compress the sealing portion (111b). The second block member (420) can compress the sealing portion (111b) in the left-right direction. The front-side sealing portion (111b) of the battery cell (110) can be positioned and fixed between the second block members (420). In addition, the second block member (420) can be positioned to press the receiving portion (111a) backward.

[0203] On the other hand, referring to FIGS. 15 and 16, on the rear side of the battery module (10), the second block member (420) may be interposed only on both sides of the barrier member (120). Accordingly, a space may be provided between adjacent second block members (420) through which venting gas or flames generated from the battery cell (110) may be vented.

[0204] According to the above-described embodiment of the present invention, when a thermal event occurs, the venting direction of venting gas or flame, etc., can be directed to the rear side. Specifically, when a thermal event occurs, the internal pressure of the sealing portion (111b) of the battery cell (110) can increase. At this time, according to the above-described embodiment of the present invention, the second block member (420) can compress the front-side sealing portion (111b) of the battery cell (110), thereby dispersing or reducing the pressure applied to the front-side sealing portion (111b). As a result, the venting gas can be suppressed or blocked from being discharged through the front-side sealing portion (111b) or the electrode lead (112) side. In addition, the pressure of the venting gas can be concentrated on the rear-side sealing portion (111b) of the battery cell (110). As a result, the venting gas can be discharged through the rear-side sealing portion (111b) of the battery cell (110).

[0205] In addition, according to the above-described embodiment of the present invention, the second block member (420) can prevent the front side sealing portion (111b) from being exposed to flame or high-temperature gas. As a result, the front side sealing portion (111b) can be prevented from being damaged by external flame or high-temperature gas, and the discharge of venting gas through the front side sealing portion (111b) can be suppressed.

[0206] In addition, according to the above-described embodiment of the present invention, the second block member (420) can prevent the front side sealing portion (111b) from being damaged by external pressure by compressing and fixing the front side sealing portion (111b).

[0207]

[0208] Meanwhile, referring again to FIG. 4, the battery cell (110) according to one embodiment of the present invention may further include a fixing member (113). The fixing member (113) may be configured to fix the upper surface of the battery cell (110).

[0209] More specifically, the cell case (111) may include a folding portion (111c) that is provided to be folded on one side of the sealing portion (111b) where the electrode lead (112) does not protrude. That is, the cell case (111) may be provided with the folding portion (111c) on the side sealing portion where the electrode lead (112) is not provided on the sealing portion (111b). This folding portion (111c) may be provided on the upper portion of the battery cell (110).

[0210] A fixing member (113) may be provided to be attached to the folding member (111c) to fix the folded folding member (111c). The fixing member (113) may be attached to the cell case (111) to wrap the folding member (111c) along the thickness direction (X-axis direction) of the battery cell (110).

[0211] In particular, the fixing member (113) may be configured to extend along the longitudinal direction of the battery cell (110). The length of the fixing member (113) may be configured to extend as much as the length of the battery cell (110). Accordingly, the fixing member (113) may be configured to completely cover the folding portion (111c) of the battery cell (110) in the longitudinal direction.

[0212] According to the above-described embodiment of the present invention, when a thermal event occurs in the battery cell (110), the folding portion (111c) located at the upper portion can be prevented from opening. As a result, the venting gas can be prevented or blocked from being discharged toward the upper portion of the battery cell (110). In addition, according to the above-described embodiment of the present invention, when a thermal event occurs in the battery cell (110), the sealing portion (111b) on the rear side can be opened, thereby inducing the venting gas to be discharged through the sealing portion (111b) on the rear side of the battery cell (110).

[0213]

[0214] FIG. 19 is a schematic perspective view of a battery pack including a battery module according to one embodiment of the present invention.

[0215] Referring to FIG. 19, 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. The battery pack (1) according to the present invention may further include a pack case (2) for accommodating a BMS (Battery Management System), a current sensor, a fuse, and the like for integrated control of charging and discharging of one or more battery modules (10), and the above-described components.

[0216] Meanwhile, in a battery pack (1) according to another embodiment of the present invention, the module case (300) may be omitted. That is, in a battery pack (1) according to another embodiment of the present invention, a plurality of battery cells (110) may not be modularized, but may be directly stored in the pack case (2). Such a battery pack (1) may be defined as a cell-to-pack type.

[0217] Referring to Fig. 19, a plurality of battery modules (10) can be arranged so that one side equipped with the module terminal (200) faces the inside of the pack case (2). Accordingly, the other side of the battery module (10) equipped with the first venting hole (H1) and the second venting hole (H2) can be arranged so as to face the outside of the pack case (2).

[0218] According to the above-described embodiment of the present invention, when a thermal event occurs in a battery cell (110) inside a battery module (10), venting gas or flames, etc. can be directionally vented toward the rear side of the battery module (10). Accordingly, venting gas or flames, etc. discharged toward the rear side can be quickly discharged to the outside of the battery pack (1).

[0219] In addition, according to the above-described embodiment of the present invention, since venting gas or flames, etc. are minimized from being directed toward the module terminal (200), heat transmission to other adjacent battery modules (10) can be suppressed or prevented. Accordingly, events resulting from thermal runaway of a battery pack (1) including a plurality of battery modules (10), such as fire or explosion, can be prevented or delayed.

[0220]

[0221] FIG. 20 is a schematic perspective view of a vehicle including a battery pack according to one embodiment of the present invention.

[0222] Referring to FIG. 20, a vehicle (V) according to an embodiment of the present invention may include one or more battery packs (1) according to an embodiment of the present invention or battery modules (10) according to an 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 a four-wheel vehicle and a two-wheel vehicle. The vehicle (V) operates by receiving power from a battery pack (1) or a battery module (10) according to an embodiment of the present invention.

[0223]

[0224] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations can be made within the scope of the technical idea of ​​the present invention and the equivalent scope of the claims to be described below by a person skilled in the art to which the present invention pertains.

Claims

1. A cell assembly comprising a plurality of battery cells; A module terminal configured to be electrically connected to the plurality of battery cells; A module case configured to accommodate the cell assembly, having the module terminal formed on one side and a first venting hole formed on the other side to allow gas generated from the battery cell to be discharged to the outside; and A battery module characterized by including a block member configured to guide the gas into the first venting hole.

2. In paragraph 1, A battery module characterized in that the first venting holes are arranged in a plurality in at least one direction.

3. In paragraph 1, Each of the above plurality of battery cells has an electrode lead, A battery module characterized by further including a bus bar frame provided on a side where the electrode leads of the battery cell are provided and in which a second venting hole is formed so as to be in communication with the first venting hole.

4. In paragraph 3, A battery module, characterized in that the second venting holes are arranged in multiple numbers along the stacking direction of the battery cells.

5. In paragraph 3, A battery module characterized in that the second venting hole is configured to allow at least a portion of the electrode leads of the plurality of battery cells to pass through it.

6. In paragraph 3, The above block absence A battery module characterized by having a first block member provided on the outside of the busbar frame and configured to suppress gas discharged from the second venting hole from moving along the stacking direction of the battery cell in the space between the busbar frame and the other side of the module case.

7. In paragraph 6, A battery module, characterized in that the first block member is arranged in plurality along the stacking direction of the battery cells.

8. In paragraph 6, A battery module characterized in that the first block member is configured to extend long in the height direction of the bus bar frame.

9. In paragraph 6, The above first block absence A battery module characterized in that it is configured to be compressed by the above busbar frame.

10. In paragraph 6, The above first block absence A battery module characterized in that it is configured to be compressed by the above module case.

11. In paragraph 3, The above block absence A battery module characterized by having a second block member interposed between the bus bar frame and the cell assembly.

12. In paragraph 11, A battery module, characterized in that the second block member is configured to extend long along the height direction of the battery cell.

13. In paragraph 11, The above battery cell A storage section configured to store the electrode assembly and extend in one direction; Including a sealing portion configured to protrude in one direction from the above storage portion, A battery module, characterized in that the second block member is provided on at least one side of the sealing portion.

14. In paragraph 13, The above cell assembly further includes a barrier member provided between the battery cells, A battery module, characterized in that the second block member is provided between the barrier member and the sealing portion of the battery cell.

15. In paragraph 13, A battery module characterized in that the second block member is configured to pressurize the inner surface of the storage portion and the bus bar frame.

16. In paragraph 14, The second block member is arranged in multiple numbers on one side and the other side of the battery cell, respectively. A battery module, characterized in that the second block member is provided in greater numbers on one side of the battery cell than on the other side of the battery cell.

17. In paragraph 1, The above battery cell A battery module characterized by including a fixing member configured to fix an upper surface.

18. A battery pack comprising a battery module according to any one of claims 1 to 17.

19. A vehicle characterized by including a battery module according to any one of claims 1 to 17.

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