Battery module, and battery pack and vehicle including same

Abstract

A battery module, and a battery pack and a vehicle including same are disclosed. The 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 accommodating the battery cell stack and having a discharge hole through which gas is discharged; and a reverse inflow prevention member which is coupled to the module case, and which prevents a discharged material, generated from the battery cell, from flowing outside of the module case and then back into the module case.

Description

Battery modules, battery packs containing the same, and vehicles

[0001] This application claims priority to Korean Patent Application No. 10-2024-0027465, filed on February 26, 2024, and all contents disclosed in the specification and drawings of the said application are incorporated herein by reference.

[0002] The present invention relates to a battery module, a battery pack including the same, and a vehicle, and more particularly, to a battery module capable of preventing reverse inflow or propagation of high-temperature discharged matter, a battery pack including the same, and a vehicle.

[0003] Generally, secondary batteries refer to batteries that can be repeatedly charged and discharged, such as lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. A battery cell, the most basic type of secondary battery, can provide an output voltage of approximately 2.5 V to 4.2 V.

[0004] Recently, as these battery cells are applied to devices that require high output voltage and large charging capacity, such as electric vehicles and Energy Storage Systems (ESS), battery modules composed of multiple battery cells connected in series, parallel, or a combination of series and parallel, and battery packs composed of these battery modules connected again in series, parallel, or a combination of series and parallel, are widely used.

[0005] Lithium secondary batteries are currently in the spotlight due to their advantages such as high operating voltage and significantly higher energy density. However, because they use organic electrolytes, there is a problem that lithium secondary batteries can cause overcurrent and overheating when overcharged, which in severe cases can cause fire due to explosion or ignition.

[0006] 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.

[0007] Referring to FIGS. 1 and 2, when a thermal event such as flame generation occurs in one of the battery cells (3) of a battery module (1) in which a plurality of battery cells (3) are stored, high-temperature discharge may be discharged outside the module case (2) of the battery module (1).

[0008] And, the high temperature discharge may move in various directions inside the pack case (4) of the battery pack (5) (see arrows in Fig. 2) and may flow back into the module case (2) through another discharge port of the module case (2) where a thermal event occurred, or may flow into another battery module (1) where a thermal event did not occur.

[0009] In this way, when a thermal event occurs, the high-temperature discharged from the battery module (1) may spread inside the pack case (4) and propagate to the battery module (1) where the thermal event has not occurred, causing a thermal runaway phenomenon. If the flame leaks out due to this thermal runaway phenomenon, there is a problem that the driver of the electric vehicle may be burned or may be put in a dangerous situation.

[0010] Alternatively, there is a problem in that the battery module (1) or battery pack (5) is damaged or burned down by a chain reaction of flames due to flame propagation, making it impossible to secure the stability of the battery module (1) or battery pack (5).

[0011] In addition, there is a problem in that the internal pressure increases as the gas generated inside the battery module (1) is not discharged, and the possibility of explosion of the battery module (1) or battery pack (5) increases.

[0012] Accordingly, the technical problem to be achieved by the present invention is to provide a battery module, a battery pack and an automobile including the same, which can prevent high-temperature discharge generated and discharged by a flame from flowing back into the same battery module and also prevent the aforementioned high-temperature discharge from being transferred or propagated to another battery module.

[0013] Additionally, a battery module, a battery pack and a vehicle including the same are provided, wherein high temperature exhaust is blocked but gas can be discharged in a preset direction.

[0014] In addition, the present invention provides a battery module capable of suppressing upward bending of the battery module, a battery pack including the same, and a vehicle.

[0015] In addition, the present invention provides a battery module capable of preventing a thermal runaway phenomenon by preventing a chain reaction of flames due to flame propagation, a battery pack including the same, and a vehicle.

[0016] However, the technical 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.

[0017] 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 accommodated and in which a discharge hole for discharging gas is formed; and a reverse inflow prevention member coupled to the module case to prevent discharged matter generated from the battery cells from flowing out of the module case and then flowing back into the module case.

[0018] In one embodiment, the reverse inflow prevention member may be formed with a moving hole that is connected to the discharge hole, and an inclined portion may be formed to prevent reverse inflow of the discharged material that has moved through the moving hole.

[0019] In one embodiment, the inclined portion may be formed to be positioned above at least a portion of the moving hole.

[0020] In one embodiment, the angle of inclination of the inclined portion may be formed such that the discharged material moving through the moving hole can collide with the inclined portion and be reflected in a direction different from the direction in which the moving hole is located.

[0021] 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.

[0022] In one embodiment, the reverse inflow prevention member may be coupled to the upper case by a screw, bolt or pin.

[0023] In one embodiment, the reverse inflow prevention member includes a lower portion having a moving hole formed therein that is connected to 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 therebetween, wherein the inclined portion is connected to the lower portion and the upper portion, respectively, and may be formed to be inclined from the lower portion toward the upper portion.

[0024] In one embodiment, the inclined portion may connect the side surface and the upper portion of the moving hole.

[0025] In one embodiment, the reverse inflow prevention member may have at least one of a front portion and a rear portion open to allow gas to move.

[0026] According to one aspect of the present invention, a battery pack may be provided, including a plurality of battery modules as described above; and a pack case in which the plurality of battery modules are stored.

[0027] In one embodiment, the pack case includes an upper frame, and the reverse inflow prevention member can be brought into contact with the inner side of the upper frame.

[0028] In one embodiment, the reverse flow prevention member is formed with a moving hole that is connected to the discharge hole, and an inclined portion is formed to prevent reverse flow of the discharged material that has moved through the moving hole, and the first inclined portion of the first reverse flow prevention member of the first battery module among the plurality of battery modules and the second inclined portion of the second reverse flow prevention member of the second battery module adjacent to the first battery module may be formed in opposite directions.

[0029] In one embodiment, the pack case may have a venting portion formed therein.

[0030] 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.

[0031] In one embodiment, gas discharged through the exhaust hole can be discharged through the venting portion.

[0032] Meanwhile, according to another aspect of the present invention, a vehicle including at least one battery module as described above can be provided.

[0033] 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.

[0034] Additionally, the high temperature discharge is blocked, but the gas can be discharged in a preset direction.

[0035] Additionally, it has the effect of suppressing upward bending of the battery module.

[0036] Additionally, it has the effect of preventing thermal runaway by preventing a chain reaction of flames due to flame propagation.

[0037] However, the effects that can be obtained through the present invention are not limited to the effects described above, and other technical effects not mentioned can be clearly understood by those skilled in the art from the description of the invention described below.

[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] Figure 1 is a perspective view of a conventional battery module.

[0040] FIG. 2 is a cross-sectional view of a battery pack including the conventional battery module of FIG. 1.

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

[0042] Figure 4 is a drawing showing the reverse inflow prevention member in Figure 3 separated from the module case.

[0043] Figure 5 is a front view of a battery module according to one embodiment of the present invention.

[0044] FIG. 6 is a perspective view showing the bottom surface of a reverse inflow prevention member in a battery module according to one embodiment of the present invention.

[0045] Fig. 7 is a drawing showing a partially cut-away view of the reverse inflow prevention member in Fig. 3.

[0046] Figure 8 is an enlarged view of part A of Figure 7.

[0047] Figure 9 is a cross-sectional view of a battery pack according to one embodiment of the present invention.

[0048] FIG. 10 is a drawing illustrating a venting portion in a battery pack according to one embodiment of the present invention.

[0049] FIG. 11 is a drawing for explaining a vehicle including a battery pack according to each embodiment of the present invention.

[0050] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Terms or words used in this specification and claims should not be interpreted as limited to their conventional or dictionary meanings, but should be interpreted with meanings and concepts that conform to the technical idea of ​​the present invention based on the principle that the inventor can appropriately define the concept of the term to best explain his or her own invention. Therefore, it should be understood that the embodiments described in this specification and the configurations illustrated in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of ​​the present invention, and various equivalents and modifications may exist as of the time of this application.

[0051] In the drawings, the sizes of each component or specific parts of that component are exaggerated, omitted, or schematically illustrated for convenience and clarity of explanation. Therefore, the size of each component does not entirely reflect its actual size. If a detailed description of a related known function or configuration is deemed to unnecessarily obscure the gist of the present invention, such description will be omitted.

[0052] The term 'joint' or 'connection' as used herein includes not only cases where one member is directly joined or directly connected to another member, but also cases where one member is indirectly joined or indirectly connected to another member through a connecting member.

[0053] FIG. 3 is a perspective view of a battery module according to an embodiment of the present invention, FIG. 4 is a view showing a reverse flow prevention member separated from a 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 a bottom surface of a reverse flow prevention member in a battery module according to an embodiment of the present invention, FIG. 7 is a view showing a partially cutaway view of the reverse flow prevention member in FIG. 3, and FIG. 8 is an enlarged view of part A of FIG. 7.

[0054] 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 inflow prevention member (300).

[0055] A battery cell stack (100) may be configured such that a plurality of battery cells (110) are stacked. The battery cells (110) may have various structures, and further, the plurality of battery cells (110) may be stacked in various ways.

[0056] 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.

[0057] The battery cell (110) may be equipped with an electrode lead. The electrode lead is a type of terminal that is exposed to the outside and connected to an external device, and may be made of a conductive material. The electrode lead may include a positive electrode lead and a negative electrode lead.

[0058] A plurality of battery cells (110) can be electrically connected via a bus bar (not shown). However, the bus bar is not shown in the drawing.

[0059] The 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) each having a storage portion capable of accommodating the battery cells (110) may be stacked. A cartridge assembly in which a plurality of cartridges (not shown) are stacked may be provided with a connector element or a terminal element.

[0060] The connector element may include various types of electrical connection components or connecting members for connection to, for example, a BMS (Battery Management System, not shown) that can provide data on the voltage or temperature of the battery cell (110).

[0061] In addition, the terminal element is a main terminal connected to the battery cell (110) and includes a positive terminal and a negative terminal. The terminal element is provided with a terminal bolt so that it can be electrically connected to the outside. Meanwhile, the battery cell (110) may have various shapes.

[0062] A battery cell stack (100) is stored in the module case (200) (see Fig. 9). And, referring to Fig. 4, a discharge hole (211) through which gas is discharged is formed in the module case (200).

[0063] 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. In addition, referring to FIG. 3 and FIG. 4 together, a reverse inflow prevention member (300) may be coupled to the upper case (210).

[0064] The module case (200) surrounds the battery cells (110) and thereby protects the battery cells (110) from external vibrations or shocks.

[0065] The module case (200) may include a mica plate formed of mica that has both thermal insulation and heat resistance to prevent flame leakage. Here, the mica plate may include not only a flat mica plate but also a shape having a mixture of flat and curved surfaces.

[0066] The module case (200) may be formed in a shape corresponding to the shape of the battery cell stack (100). For example, if the battery cell stack (100) is formed in a hexahedral shape with a rectangular cross-section, the module case (200) may also be formed in a hexahedral shape corresponding thereto.

[0067] The module case (200) can be manufactured, for example, by bending a metal plate, thereby enabling the module case (200) to be manufactured as an integral part. When the module case (200) is manufactured as an integral part, the joining process is simplified and simplified. Alternatively, the module case (200) may be provided in a detachable form and joined by welding or the like. However, the material of the module case (200) is not limited to a metal material.

[0068] Referring to FIGS. 3 and 4 together, the reverse inflow prevention member (300) can be coupled to the module case (200), for example, the upper case (210) of the module case (200). The reverse inflow prevention member (300) prevents high-temperature discharged matter generated from the battery cell (110) from flowing out of the module case (200) and then flowing back into the module case (200) again.

[0069] In addition, the reverse inflow prevention member (300) prevents high-temperature discharge generated from the battery cell (110) and flowing out of the module case (200) from being transferred or propagated to another adjacent battery module (10).

[0070] Here, the high temperature discharge includes, but is not limited to, gases, various types of high temperature particles, flames, cell electrodes, etc.

[0071] Referring to FIGS. 4, 6, and 7 together, a moving hole (311) connected to a discharge hole (211) may be formed in the reverse flow prevention member (300). In addition, a slope (340) may be formed in the reverse flow prevention member (300) to prevent reverse flow and transfer or propagation of discharged matter that has moved through the moving hole (311).

[0072] The reverse inflow prevention member (300) can be formed in various shapes. Referring to FIG. 4, it can be formed in a hexahedral shape with a square cross-section, but is not limited thereto. However, for convenience of explanation, the following description will focus on a case where the reverse inflow prevention member (300) is formed in a hexahedral shape.

[0073] Referring to FIGS. 4 to 6, the reverse inflow prevention member (300) may include a lower portion (310), a side portion (320), and an upper portion (330).

[0074] The lower part (310) is formed with a moving hole (311) that is connected to 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 reverse inflow prevention member (300) through the moving hole (311) that is connected to the discharge hole (211). A detailed description thereof will be provided later.

[0075] The side portion (320) is connected to the lower portion (310). The side portions (320) are formed as a pair, and are respectively connected to both ends of the lower portion (310) and also respectively connected to both ends of the upper portion (330).

[0076] The upper portion (330) is connected to the side portion (320) at both ends. In addition, the upper portion (330) is spaced apart from the lower portion (310) by a preset interval. As a result, a preset space is formed between the upper portion (330) and the lower portion (310). In addition, gas can be discharged through the space formed between the upper portion (330) and the lower portion (310).

[0077] For example, referring to FIGS. 4 and 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.

[0078] And, the gas that has moved into the reverse inflow prevention member (300) through the moving hole (311) connected to the discharge hole (211) is 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 can be discharged to the outside of the pack case (21) through the venting part (23) formed in the pack case (21) described later.

[0079] This method has the effect of enabling directional venting, which allows gas to be discharged in the direction intended by the designer.

[0080] Referring to Fig. 5, the inclined portion (340) is connected to the lower portion (310) and the upper portion (330), respectively, and may be formed to be inclined from the lower portion (310) toward the upper portion (330). Referring to Figs. 7 and 8, the inclined portion (340) may be configured to connect the side surface of the moving hole (311) and the upper portion (330).

[0081] 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 that moves upward through the moving hole (311) (see arrow a in FIG. 8) hits the inclined portion (340).

[0082] Here, the inclination angle of the inclined portion (340) can be formed so that the discharged material moving through the moving hole (311) can collide with the inclined portion (340) and be reflected in a direction different from the direction in which the moving hole (311) is located.

[0083] Accordingly, the high-temperature discharge that hits the inclined portion (340) moves in a direction other than where the moving hole (311) is located (see arrow b in FIG. 8), so that 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 reverse flow prevention member (300), it does not transfer or propagate to another battery module (10).

[0084] By this, the high temperature discharge is dispersed, so that heat can be prevented from being concentrated in any one battery module (10), and also, a thermal runaway phenomenon caused by heat propagation can be prevented.

[0085] 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) so that the moving hole (311) formed in the reverse inflow prevention member (300) is in communication with the discharge hole (211) formed in the upper case (210) (see FIG. 7).

[0086] Here, the reverse inflow prevention member (300) can be coupled to the upper case (210) in various ways, for example, by a screw (400), bolt, or pin, but is not limited thereto.

[0087] 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.

[0088] Hereinafter, a battery pack (20) according to one embodiment of the present invention will be described, and any content common to that described in the battery module (10) according to one embodiment of the present invention described above will be replaced with the above-described description.

[0089] 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 embodiments described above. In addition, the battery pack (20) according to one embodiment of the present invention includes a pack case (21) for storing the battery modules (10).

[0090] The pack case (21) may include an upper frame (22). In addition, a reverse inflow prevention member (300) included in the battery module (10) may be brought into contact with the inner side of the upper frame (22). According to this structure, the upper frame (22) can press the reverse inflow prevention member (300), thereby having the effect of suppressing upward bending of the battery module (10).

[0091] And, as shown in FIG. 9, the first inclined portion (340a) of the first reverse inflow prevention member (300a) of the first battery module (10a) among the plurality of battery modules (10a, 10b) and the second inclined portion (340b) of the second reverse inflow prevention member (300b) of the second battery module (10b) adjacent to the first battery module (10a) may be formed in opposite directions.

[0092] That is, the first inclined portion (340a) may be formed so that the high-temperature discharge generated from the first battery module (10a) faces in a direction away from the second battery module (10b). In addition, the second inclined portion (340b) may be formed so that the high-temperature discharge generated from the second battery module (10b) faces in a direction away from the first battery module (10a).

[0093] By this structure, even if a flame occurs in one battery module (10), the high-temperature discharge does not transfer or propagate to another adjacent battery module (10), thereby preventing a thermal runaway phenomenon.

[0094] 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).

[0095] 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).

[0096] In addition, 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.

[0097] That is, the venting valve (26) normally blocks the venting hole (25), but when gas leaks 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).

[0098] As described above, gas discharged from the module case (200) through the discharge hole (211) of the module case (200) can move into the reverse inflow prevention member (300) through the movement hole (311) connected to the discharge hole (211).

[0099] In addition, 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). In addition, 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).

[0100] By this, the high temperature discharge is blocked by the inclined portion (340), but the gas can be discharged in a preset direction, and in this way, directional venting is enabled.

[0101] Meanwhile, the battery pack (20) according to one embodiment of the present invention may further include various devices for controlling charging and discharging of battery cells (110) stored in the battery module (10), such as a BMS, a current sensor, a fuse, etc.

[0102] FIG. 11 is a drawing for explaining a vehicle including a battery pack according to each embodiment of the present invention.

[0103] 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 embodiments described above. 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 embodiments described above. Here, the battery pack (20) may include one or more battery modules (10) according to each of the embodiments described above.

[0104] And, the above-mentioned automobile (30) includes various automobiles that are designed to use electricity, such as electric automobiles or hybrid automobiles.

[0105] In this specification, when terms indicating directions such as up, down, left, and right are used, these terms are only for convenience of explanation, and it is obvious to those skilled in the art that these terms may vary depending on the location of the target object or the location of the observer.

[0106] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and those skilled in the art to which the present invention pertains may make various modifications and variations within the scope of the technical spirit of the present invention and the equivalent scope of the claims to be described below. Therefore, the embodiments disclosed above should be considered in an illustrative rather than a restrictive sense. In other words, the true scope of the technical spirit of the present invention is set forth in the claims, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

[0107] The present invention relates to a battery module, a battery pack including the same, and an automobile, and is particularly applicable to industries related to secondary batteries.

Claims

1. A battery cell stack in which multiple battery cells are stacked; A module case in which the battery cell stack is housed and a discharge hole through which gas is discharged is formed; and A battery module that is coupled to the module case and includes a reverse inflow prevention member that prevents discharged matter generated from the battery cell from flowing out of the module case and then flowing back into the module case.

2. In paragraph 1, A battery module characterized in that 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.

3. In paragraph 2, A battery module characterized in that the inclined portion is formed to be positioned above at least a portion of the moving hole.

4. In paragraph 3, A battery module characterized in that the angle of inclination of the inclined portion is formed such that the discharged material moving through the moving hole can collide with the inclined portion and be reflected in a direction different from the direction in which the moving hole is located.

5. In paragraph 2, The above module case includes an upper case, The discharge hole is formed in the upper case, A battery module characterized in that the above reverse inflow prevention member is coupled to the upper case.

6. In paragraph 5, A battery module characterized in that the reverse inflow prevention member is connected to the upper case by a screw, bolt or pin.

7. In paragraph 2, The above reverse inflow prevention member is, A lower part having a moving hole formed to communicate with the above discharge hole; a side portion connected to the lower portion; and It includes an upper part connected to the side part and spaced apart from the lower part so that a space is formed between the upper part and the lower part, A battery module characterized in that the inclined portion is connected to the lower portion and the upper portion, respectively, and is formed to be inclined from the lower portion toward the upper portion.

8. In paragraph 7, A battery module characterized in that the inclined portion connects the side surface of the moving hole and the upper portion.

9. In paragraph 1, A battery module characterized in that the above reverse inflow prevention member is open at least one of the front and rear portions to allow gas to move.

10. A plurality of battery modules according to any one of claims 1 to 9; and A battery pack comprising a pack case in which the plurality of battery modules are stored.

11. In paragraph 10, The above pack case includes an upper frame, A battery pack characterized in that the above reverse inflow prevention member is in contact with the inner side of the upper frame.

12. In paragraph 11, In the above reverse inflow prevention member, a moving hole connected to the discharge hole is formed, and an inclined portion is formed to prevent reverse inflow of the discharged material that has moved through the moving hole. A battery pack characterized in that a first inclined portion of a first reverse inflow prevention member of a first battery module among a plurality of battery modules and a second inclined portion of a second reverse inflow prevention member of a second battery module adjacent to the first battery module are formed in opposite directions.

13. In paragraph 10, A battery pack characterized in that a venting portion is formed in the above pack case.

14. In paragraph 13, The above venting part, A venting hole through which gas generated from the battery cell is discharged; and A battery pack characterized by including a venting valve that closes the venting hole and opens when the internal pressure of the pack case exceeds a preset value.

15. In paragraph 13, A battery pack characterized in that gas discharged through the above discharge hole is discharged through the above venting part.

16. A vehicle comprising at least one battery module according to any one of claims 1 to 9.

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