Battery module and battery pack including the same and vehicle including the same

Abstract

A battery module, a battery pack including the same, and an automobile are disclosed. A battery module according to one embodiment of the present invention comprises: a battery cell stack in which a plurality of battery cells are stacked; a module case in which the battery cell stack is housed and a discharge hole for discharging gas is formed; and a reverse inflow prevention member coupled to the module case and preventing discharged material generated from the battery cells from flowing out of the module case and then flowing back into the module case.

Description

Technology Field

[0001] The present invention relates to a battery module, a battery pack including the same, and an automobile, and more specifically, to a battery module capable of preventing the reverse inflow or propagation of high-temperature discharge, a battery pack including the same, and an automobile. Background Technology

[0002] Generally, a secondary battery refers to a battery capable of repeated charging and discharging, such as lithium-ion batteries, lithium-polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries. The battery cells corresponding to the most basic secondary batteries can provide an output voltage of approximately 2.5V to 4.2V.

[0003] Recently, as these battery cells are applied to devices requiring high output voltage and large charging capacity, such as electric vehicles or Energy Storage Systems (ESS), battery modules configured by connecting multiple battery cells in series, parallel, or a combination of series and parallel, and battery packs configured by connecting these battery modules again in series, parallel, or a combination of series and parallel are widely used.

[0004] Lithium secondary batteries are currently in the spotlight due to their advantages, such as high operating voltage and significantly higher energy density, but because they use organic electrolytes, if the lithium secondary battery is overcharged, it causes overcurrent and overheating, which in severe cases can lead to explosions or fires caused by ignition.

[0005] FIG. 1 is a perspective view of a conventional battery module, and FIG. 2 is a cross-sectional view of a battery pack including the conventional battery module of FIG. 1.

[0006] Referring to FIGS. 1 and 2, when a thermal event such as flame generation occurs in any one of the battery cells (3) of a battery module (1) in which a plurality of battery cells (3) are housed, a high-temperature discharge may be discharged to the outside of the module case (2) of the battery module (1).

[0007] And, the above high-temperature discharge may move in various directions (see arrow in FIG. 2) inside the pack case (4) of the battery pack (5) and flow back into the module case (2) through another discharge port of the module case (2) where a thermal event occurred, or flow into another battery module (1) where no thermal event occurred.

[0008] As such, when a thermal event occurs, the high-temperature discharge from the battery module (1) spreads within the pack case (4) and propagates to the battery module (1) where no thermal event has occurred, which may cause a thermal runaway phenomenon. If flames leak out due to such a thermal runaway phenomenon, there is a problem that the driver of the electric vehicle may suffer burns or be put in a dangerous situation.

[0009] Alternatively, there is a problem in that the battery module (1) to battery pack (5) is damaged or completely burned due to a chain reaction of flames caused by flame propagation, and thus the stability of the battery module (1) to battery pack (5) cannot be secured.

[0010] In addition, there is a problem in that the gas generated inside the battery module (1) is not discharged, causing the internal pressure to increase and increasing the possibility of explosion of the battery module (1) or battery pack (5). The problem to be solved

[0011] Accordingly, the technical problem to be solved by the present invention is to provide a battery module capable of preventing high-temperature discharge generated and discharged by a flame from flowing back into the same battery module, and also preventing the aforementioned high-temperature discharge from being transferred or propagated to another battery module, a battery pack including the same, and an automobile.

[0012] In addition, the invention provides a battery module in which high-temperature discharge is blocked but gas can be discharged in a preset direction, a battery pack including the same, and a vehicle.

[0013] In addition, the invention provides a battery module capable of suppressing upward bending of the battery module, a battery pack including the same, and an automobile.

[0014] In addition, the invention provides a battery module capable of preventing thermal runaway by preventing a chain reaction of flames caused by flame propagation, a battery pack including the same, and an automobile.

[0015] However, 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 those skilled in the art from the description of the invention below. means of solving the problem

[0016] According to one aspect of the present invention, a battery module may be provided comprising: a battery cell stack in which a plurality of battery cells are stacked; a module case in which the battery cell stack is housed and a discharge hole for discharging gas is formed; and a reverse inflow prevention member coupled to the module case and preventing discharged material generated from the battery cells from flowing out of the module case and then flowing back into the module case.

[0017] In one embodiment, the backflow prevention member may have a moving hole formed therein that communicates with the discharge hole, and an inclined portion may be formed to prevent backflow of the discharged material that has moved through the moving hole.

[0018] In one embodiment, the inclined portion may be formed to be located above at least a portion of the moving hole.

[0019] In one embodiment, the inclination angle of the inclined portion may be formed to have a range in which the discharged material moving through the moving hole strikes the inclined portion and is reflected in a direction different from the direction in which the moving hole is located.

[0020] In one embodiment, the module case includes an upper case, the discharge hole is formed in the upper case, and the reverse inflow prevention member can be coupled to the upper case.

[0021] In one embodiment, the backflow prevention member may be coupled to the upper case by means of a screw, bolt, or pin.

[0022] In one embodiment, the reverse inflow prevention member comprises: a lower portion having a movable hole formed therein communicating with the discharge hole; a side portion connected to the lower portion; and an upper portion connected to the side portion and spaced apart from the lower portion to form a space between it and the lower portion, wherein the inclined portion is coupled to the lower portion and the upper portion, respectively, and may be formed to be inclined from the lower portion toward the upper portion.

[0023] In one embodiment, the inclined portion can connect the side surface of the moving hole and the upper portion.

[0024] In one embodiment, at least one of the front and rear portions of the reverse flow prevention member may be open to allow gas to move.

[0025] According to one aspect of the present invention, a battery pack may be provided comprising the aforementioned plurality of battery modules; and a pack case in which the plurality of battery modules are housed.

[0026] In one embodiment, the pack case includes an upper frame, and the reverse inflow prevention member may be in contact with the inner side of the upper frame.

[0027] In one embodiment, the reverse inflow prevention member has a moving hole formed therein that communicates with the discharge hole, and an inclined portion formed therein to prevent the reverse inflow of the discharged material that has moved through the moving hole, and the first inclined portion of the first reverse inflow prevention member of the first battery module among the plurality of battery modules and the second inclined portion of the second reverse inflow prevention member of the second battery module adjacent to the first battery module may be formed in opposite directions to each other.

[0028] In one embodiment, a venting portion may be formed in the pack case.

[0029] In one embodiment, the venting portion may include a venting hole through which gas generated from the battery cell is discharged; and a venting valve that closes the venting hole and opens when the internal pressure of the pack case exceeds a preset value.

[0030] In one embodiment, the gas discharged through the discharge hole can be discharged through the venting part.

[0031] Meanwhile, according to another aspect of the present invention, an automobile comprising at least one of the aforementioned battery modules may be provided. Effects of the invention

[0032] The embodiments of the present invention have the effect of preventing high-temperature discharge generated and discharged by a flame from flowing back into the same battery module, and also preventing the aforementioned high-temperature discharge from being transferred or propagated to another battery module.

[0033] In addition, high-temperature discharge is blocked, but the gas can be discharged in a preset direction.

[0034] In addition, it has the effect of suppressing upward bending of the battery module.

[0035] In addition, it has the effect of preventing thermal runaway phenomena by preventing a chain reaction of flames caused by flame propagation.

[0036] However, 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 those skilled in the art from the description of the invention below. Brief explanation of the drawing

[0037] 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 of a conventional battery module. FIG. 2 is a cross-sectional view of a battery pack including the conventional battery module of FIG. 1. FIG. 3 is a combined perspective view of a battery module according to one embodiment of the present invention. Figure 4 is a drawing showing the backflow prevention member separated from the module case in Figure 3. FIG. 5 is a front view of a battery module according to one embodiment of the present invention. FIG. 6 is a perspective view showing the bottom surface of a reverse flow prevention member in a battery module according to one embodiment of the present invention. Figure 7 is a drawing showing a partial cut of the backflow prevention member in Figure 3. Figure 8 is an enlarged view of part A of Figure 7. FIG. 9 is a cross-sectional view of a battery pack according to one embodiment of the present invention. FIG. 10 is a drawing illustrating a venting portion in a battery pack according to one embodiment of the present invention. FIG. 11 is a drawing for explaining a vehicle including a battery pack according to each embodiment of the present invention. Specific details for implementing the invention

[0038] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. 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. Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely one preferred embodiment of the present invention and do not represent all aspects of the technical spirit of the present invention; therefore, it should be understood that various equivalents and modifications capable of replacing them may exist at the time of filing this application.

[0039] In the drawings, the size of each component or specific part constituting the component is exaggerated, omitted, or schematically depicted for convenience and clarity of explanation. Accordingly, the size of each component does not entirely reflect its actual size. If it is determined that a detailed description of related known functions or configurations could unnecessarily obscure the essence of the invention, such description shall be omitted.

[0040] As used in this specification, the terms "combination" or "connection" include not only cases where one member and another member are directly joined or directly connected, but also cases where one member is indirectly joined or indirectly connected to another member through a connecting member.

[0041] FIG. 3 is a combined perspective view of a battery module according to an embodiment of the present invention, FIG. 4 is a drawing showing the reverse flow prevention member separated from the module case in FIG. 3, FIG. 5 is a front view of a battery module according to an embodiment of the present invention, FIG. 6 is a perspective view showing the bottom surface of the reverse flow prevention member in a battery module according to an embodiment of the present invention, FIG. 7 is a drawing showing the reverse flow prevention member partially cut in FIG. 3, and FIG. 8 is an enlarged view of part A in FIG. 7.

[0042] Referring to FIG. 3, a battery module (10) according to one embodiment of the present invention includes a battery cell stack (100, see FIG. 9), a module case (200), and a reverse flow prevention member (300).

[0043] A battery cell stack (100) can be configured to stack a plurality of battery cells (110). The battery cells (110) can have various structures, and the plurality of battery cells (110) can also be stacked in various ways.

[0044] The battery cell (110) may have a structure in which a plurality of unit cells arranged in the order of positive plate-separator-negative plate or bi-cells arranged in the order of positive plate-separator-negative plate-separator-positive plate-separator-negative plate are stacked according to the battery capacity.

[0045] The battery cell (110) may be provided with electrode leads. The electrode leads may be made of a conductive material and serve as a type of terminal that is exposed to the outside and connected to an external device. The electrode leads may include a positive electrode lead and a negative electrode lead.

[0046] Multiple battery cells (110) can be electrically connected via a busbar (not shown). However, the busbar is not shown in the drawing.

[0047] A battery cell stack (100) may be provided with a plurality of cartridges (not shown) that accommodate battery cells (110). Each cartridge (not shown) may be manufactured by injection molding of plastic, and a plurality of cartridges (not shown) may be stacked, each having a storage portion formed to accommodate a battery cell (110). A cartridge assembly in which a plurality of cartridges (not shown) are stacked may be provided with a connector element or a terminal element.

[0048] The connector element may include various types of electrical connection components or connection members for connecting to a BMS (Battery Management System, not shown), for example, which can provide data on the voltage or temperature of the battery cell (110).

[0049] Additionally, the terminal element includes a positive terminal and a negative terminal as a main terminal connected to the battery cell (110). The terminal element is equipped with a terminal bolt so that it can be electrically connected to the outside. Meanwhile, the battery cell (110) may have various shapes.

[0050] A battery cell stack (100) is housed in the module case (200) (see FIG. 9). Also, referring to FIG. 4, a discharge hole (211) through which gas is discharged is formed in the module case (200).

[0051] Referring to FIG. 4, the module case (200) may include an upper case (210), a lower case (220), and a side case (230), and the discharge hole (211) may be formed, for example, in the upper case (210), but is not limited thereto. Also, referring to FIG. 3 and FIG. 4 together, a reverse flow prevention member (300) may be coupled to the upper case (210).

[0052] The module case (200) surrounds the battery cells (110) and thereby protects the battery cells (110) from external vibrations or shocks.

[0053] The module case (200) may include a mica plate formed of mica that has both thermal insulation and heat resistance to prevent the leakage of flames. Here, the mica plate may include not only a flat mica plate but also a shape that is a mixture of flat and curved surfaces.

[0054] The module case (200) can be formed in a shape corresponding to the shape of the battery cell stack (100). For example, if the cross-section of the battery cell stack (100) is provided in a rectangular hexahedron shape, the module case (200) can also be provided in a hexahedron shape corresponding to this.

[0055] The module case (200) can be manufactured, for example, by bending a metal plate, and thereby the module case (200) can be manufactured as a single unit. When the module case (200) is manufactured as a single unit, the joining process becomes simpler and more streamlined. Alternatively, the module case (200) may be provided as a separate unit and joined by welding or the like. However, the material of the module case (200) is not limited to metal.

[0056] Referring to FIGS. 3 and FIGS. 4 together, the reverse flow prevention member (300) can be coupled to the module case (200), for example, the upper case (210) of the module case (200). The reverse flow prevention member (300) prevents high-temperature discharge generated from the battery cell (110) from flowing out of the module case (200) and then flowing back into the module case (200).

[0057] And, the reverse inflow prevention member (300) prevents high-temperature discharge generated from the battery cell (110) and leaked out of the module case (200) from being transferred or propagated to an adjacent battery module (10).

[0058] Here, the high-temperature discharge includes, but is not limited to, gases, various types of high-temperature particles, flames, cell electrodes, etc.

[0059] Referring to FIGS. 4, 6, and 7 together, a moving hole (311) communicating with a discharge hole (211) may be formed in the back-flow prevention member (300). Additionally, an inclined portion (340) may be formed in the back-flow prevention member (300) to prevent back-flow of discharge moving through the moving hole (311) and to prevent transfer or propagation.

[0060] The reverse inflow prevention member (300) can be formed in various shapes, and referring to FIG. 4, it can be formed in a cuboid shape with a square cross-section, but is not limited thereto. However, for convenience of explanation, the following description will focus on the case where the reverse inflow prevention member (300) is formed in a cuboid shape.

[0061] Referring to FIGS. 4 to 6, the reverse flow prevention member (300) may include a lower part (310), a side part (320), and an upper part (330).

[0062] The lower portion (310) has a moving hole (311) formed in communication with the discharge hole (211). That is, when a flame occurs in the battery cell (110), the high-temperature discharge generated by the flame is discharged to the outside of the module case (200) through the discharge hole (211) and moves into the inside of the reverse inflow prevention member (300) through the moving hole (311) communicating with the discharge hole (211). A detailed explanation of this will be provided later.

[0063] The side portion (320) is connected to the lower portion (310). The side portion (320) is formed as a pair and is connected to each of the two ends of the lower portion (310), and is also connected to each of the two ends of the upper portion (330).

[0064] The upper portion (330) is connected to the side portion (320) at both ends. The upper portion (330) is spaced apart from the lower portion (310) by a predetermined distance. As a result, a predetermined space is formed between the upper portion (330) and the lower portion (310). Gas can be discharged through the space formed between the upper portion (330) and the lower portion (310).

[0065] For example, referring to FIG. 4 and FIG. 5 together, at least one of the front portion (350) and the rear portion (360) of the reverse inflow prevention member (300) may be opened. In FIG. 5, both the front portion (350) and the rear portion (360) of the reverse inflow prevention member (300) are open, but only one of the front portion (350) and the rear portion (360) may be opened as needed.

[0066] And, gas that has moved into the back-flow prevention member (300) through the moving hole (311) connected to the discharge hole (211) is discharged to the outside of the back-flow prevention member (300) through the front part (350) and rear part (360) of the back-flow prevention member (300), and can be discharged to the outside of the pack case (21) through the venting part (23) formed in the pack case (21) described later.

[0067] This method has the effect of enabling directional venting, which allows gas to be discharged in the direction intended by the designer.

[0068] Referring to FIG. 5, the inclined portion (340) is connected to the lower portion (310) and the upper portion (330), respectively, and can be formed to be inclined from the lower portion (310) toward the upper portion (330). Referring to FIG. 7 and FIG. 8, the inclined portion (340) can be configured to connect the side surface of the moving hole (311) and the upper portion (330).

[0069] And, referring to FIG. 5 and FIG. 8 together, the inclined portion (340) is formed to be located above at least a portion of the moving hole (311). That is, since the inclined portion (340) is located above the moving hole (311), the high-temperature discharge moving upward through the moving hole (311) (see arrow a in FIG. 8) strikes the inclined portion (340).

[0070] Here, the inclination angle of the inclined portion (340) can be formed such that the discharge moving through the moving hole (311) can strike the inclined portion (340) and be reflected in a direction different from the direction in which the moving hole (311) is located.

[0071] Therefore, the high-temperature discharge that hits the inclined portion (340) moves in a different direction where the moving hole (311) is not located (see arrow b in FIG. 8), so it does not flow back into the module case (200) through the moving hole (311), and also, since the high-temperature discharge is blocked by the back-flow prevention member (300), it does not transfer or propagate to another battery module (10).

[0072] As a result, the high-temperature discharge is dispersed, so heat can be prevented from concentrating in any one battery module (10), and also, the thermal runaway phenomenon caused by heat propagation can be prevented.

[0073] Meanwhile, referring to FIG. 5, the reverse inflow prevention member (300) can be coupled to the upper case (210). Here, as described above, the reverse inflow prevention member (300) can be coupled to the upper case (210) such that the moving hole (311) formed in the reverse inflow prevention member (300) communicates with the discharge hole (211) formed in the upper case (210) (see FIG. 7).

[0074] Here, the reverse flow prevention member (300) can be coupled to the upper case (210) in various ways, for example, by a screw (400), a bolt, or a pin, but is not limited thereto.

[0075] FIG. 9 is a cross-sectional view of a battery pack according to one embodiment of the present invention, and FIG. 10 is a drawing illustrating a venting portion in a battery pack according to one embodiment of the present invention.

[0076] Hereinafter, a battery pack (20) according to one embodiment of the present invention will be described, provided that common details with those described in the battery module (10) according to one embodiment of the present invention described above will be replaced by the description above.

[0077] Referring to FIG. 9, a battery pack (20) according to one embodiment of the present invention includes one or more battery modules (10) according to each of the above embodiments. In addition, a battery pack (20) according to one embodiment of the present invention includes a pack case (21) for housing the battery modules (10).

[0078] The pack case (21) may include an upper frame (22). Additionally, a reverse flow prevention member (300) included in the battery module (10) may come into contact with the inner side of the upper frame (22). With this structure, the upper frame (22) can press the reverse flow prevention member (300), thereby having the effect of suppressing upward bending of the battery module (10).

[0079] And, as shown in FIG. 9, among the plurality of battery modules (10a, 10b), the first inclined portion (340a) of the first reverse flow prevention member (300a) of the first battery module (10a) and the second inclined portion (340b) of the second reverse flow prevention member (300b) of the second battery module (10b) adjacent to the first battery module (10a) may be formed in opposite directions.

[0080] That is, a first inclined portion (340a) may be formed so that the high-temperature discharge generated from the first battery module (10a) is directed away from the second battery module (10b). Additionally, a second inclined portion (340b) may be formed so that the high-temperature discharge generated from the second battery module (10b) is directed away from the first battery module (10a).

[0081] Due to this structure, even if a flame occurs in one battery module (10), the high-temperature discharge is not transferred or propagated to an adjacent battery module (10), thereby preventing thermal runaway.

[0082] Referring to FIG. 10, a venting portion (23) may be formed in the pack case (21). Here, the venting portion (23) may include a venting hole (25) and a venting valve (26).

[0083] The venting hole (25) is a hole through which gas generated from the battery cell (110) is discharged, and can be formed in the pack case (21).

[0084] Additionally, a venting valve (26) may be installed in the venting hole (25). The venting valve (26) may be configured in various ways. For example, the venting valve (26) may be configured to close the venting hole (25) and open when the internal pressure of the pack case (21) exceeds a preset value.

[0085] That is, the venting valve (26) normally blocks the venting hole (25), but when gas leaks out from the battery cell (110) and the internal pressure of the pack case (21) exceeds a preset value or range, the venting valve (26) opens and the gas is discharged from the pack case (21) through the venting hole (25).

[0086] As described above, gas discharged from the module case (200) through the discharge hole (211) of the module case (200) can move into the backflow prevention member (300) through the moving hole (311) connected to the discharge hole (211).

[0087] And, the gas that has moved into the reverse inflow prevention member (300) can be discharged to the outside of the reverse inflow prevention member (300) through the front part (350) and the rear part (360) of the reverse inflow prevention member (300). And, the gas discharged to the outside of the reverse inflow prevention member (300) can be discharged to the outside of the pack case (21) through the venting part (23) formed in the pack case (21).

[0088] As a result, the high-temperature discharge is blocked by the inclined section (340), but the gas can be discharged in a preset direction, and thus directional venting is possible.

[0089] Meanwhile, a battery pack (20) according to one embodiment of the present invention may further include various devices for controlling the charging and discharging of a battery cell (110) housed in a battery module (10), such as a BMS, a current sensor, a fuse, etc.

[0090] FIG. 11 is a drawing for explaining a vehicle including a battery pack according to each embodiment of the present invention.

[0091] Referring to FIG. 11, a vehicle (30) according to one embodiment of the present invention may include one or more battery modules (10) according to each of the aforementioned embodiments. Alternatively, a vehicle (30) according to one embodiment of the present invention may include one or more battery packs (20) according to each of the aforementioned embodiments. Here, the battery pack (20) may include one or more battery modules (10) according to each of the aforementioned embodiments.

[0092] And, the above-mentioned automobile (30) includes various types of automobiles designed to use electricity, such as electric vehicles or hybrid vehicles, for example.

[0093] In this specification, where terms indicating directions such as up, down, left, and right are used, these terms are used merely for convenience of explanation, and it is obvious to those skilled in the art that they may vary depending on the location of the object or the position of the observer.

[0094] Although the present invention has been described above by means of 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 set forth below by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed above should be considered in an illustrative rather than a restrictive sense. That is, the scope of the true technical spirit of the present invention is indicated in the claims, and all variations within the equivalent scope thereof should be interpreted as being included in the present invention. Explanation of the symbols

[0095] 10: Battery Module 100 : Battery cell laminate 110 : Battery cell 200 : Module case 210 : Upper case 211 : Ejection hole 220 : Lower case 230 : Side case 300 : Backflow prevention member 310 : Lower part 311 : Moving hole 320 : Side section 330 : Upper section 340 : Inclined section 350 : Front section 360 : Rear section 400 : Screw 20: Battery pack 21 : Pack case 22 : Top frame 23 : Venting section 25 : Venting hole 26: Venting valve 30 : Car

Claims

Claim 1 A battery module comprising: a battery cell stack in which a plurality of battery cells are stacked; a module case in which the battery cell stack is housed and a discharge hole is formed for discharging gas; and a reverse inflow prevention member coupled to the module case and preventing discharged material generated from the battery cells from flowing out of the module case and then flowing back into the module case, wherein the reverse inflow prevention member has a moving hole formed in communication with the discharge hole and an inclined portion formed to prevent reverse inflow of the discharged material that has moved through the moving hole, and further, the reverse inflow prevention member has a lower portion and an upper portion formed therein, wherein the inclined portion is formed to be located above at least a portion of the moving hole, and the inclined portion is coupled to the lower portion and the upper portion, respectively, and wherein at least one of the front portion and the rear portion of the reverse inflow prevention member is open to allow gas to move. Claim 2 delete Claim 3 delete Claim 4 A battery module according to claim 1, characterized in that the angle of inclination of the inclined portion is formed such that the discharged material moving through the moving hole strikes the inclined portion and is reflected in a direction different from the direction in which the moving hole is located. Claim 5 A battery module according to claim 1, wherein the module case includes an upper case, the discharge hole is formed in the upper case, and the reverse inflow prevention member is coupled to the upper case. Claim 6 A battery module according to claim 5, characterized in that the above-mentioned reverse inflow prevention member is coupled to the above-mentioned upper case by means of a screw, bolt, or pin. Claim 7 A battery module according to claim 1, wherein the reverse inflow prevention member comprises: a lower portion having a moving hole formed therein communicating with the discharge hole; a side portion connected to the lower portion; and an upper portion connected to the side portion and spaced apart from the lower portion to form a space between it and the lower portion, wherein the inclined portion is coupled to the lower portion and the upper portion respectively and is formed to be inclined from the lower portion toward the upper portion. Claim 8 A battery module according to claim 7, characterized in that the inclined portion connects the side surface of the moving hole and the upper portion. Claim 9 delete Claim 10 A battery pack comprising a plurality of battery modules according to any one of claims 1, 4 to 8; and a pack case in which the plurality of battery modules are housed. Claim 11 A battery pack according to claim 10, wherein the above-mentioned pack case includes an upper frame, and the above-mentioned reverse flow prevention member contacts the inner side of the upper frame. Claim 12 A battery pack according to claim 11, wherein the reverse inflow prevention member has a moving hole formed in communication with the discharge hole, and an inclined portion formed to prevent reverse inflow of the discharged material that has moved through the moving hole, and wherein the first inclined portion of the first reverse inflow prevention member of the first battery module among a plurality of battery modules and the second inclined portion of the second reverse inflow prevention member of the second battery module adjacent to the first battery module are formed in opposite directions. Claim 13 A battery pack according to claim 10, characterized in that a venting portion is formed in the pack case. Claim 14 A battery pack according to claim 13, wherein the venting portion comprises: a venting hole through which gas generated from the battery cell is discharged; and a venting valve that closes the venting hole and opens when the internal pressure of the pack case exceeds a preset value. Claim 15 A battery pack according to claim 13, characterized in that the gas discharged through the discharge hole is discharged through the venting part. Claim 16 An automobile comprising at least one battery module according to any one of paragraphs 1, 4 through 8.

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