Flame leakage prevention exhaust device and battery pack comprising same

Abstract

The exhaust device according to the present invention comprises: an inlet; an outlet; and a fluid flow path extending from the inlet to the outlet, where the fluid flow path has a curved shape to block movement of the flame.

Description

Technical Field

[0001] The present disclosure relates to an exhaust device, and more particularly, to an exhaust device capable of preventing flame from leaking to the outside and exhausting gas when ignition occurs in a battery module or a battery pack.

[0002] This application claims priority from Korean Patent Application No. 10-2023-0030768 filed in Korea on March 8, 2023, the disclosure of which is incorporated herein by reference. Background Art

[0003] Recently, secondary batteries have been applied to various devices. For example, secondary batteries are widely used in electric vehicles, hybrid electric vehicles, etc., which are presented as alternatives to existing gasoline and diesel vehicles, and as energy sources for multifunctional small products such as wireless mobile devices or wearable devices.

[0004] Typically, each commercialized secondary battery has an operating voltage of approximately 2.5 V to 4.5 V. Therefore, for electric vehicles or energy storage devices requiring large capacity and high output, battery modules obtained by connecting a plurality of secondary batteries in series and / or in parallel, and battery packs obtained by connecting battery modules in series and / or in parallel are configured and used as energy sources.

[0005] As described above, as secondary batteries are used as large-capacity and high-output energy sources, ensuring the safety of battery packs has become an important issue.

[0006] Since secondary batteries operate based on a basic mechanism using electrochemical reactions, they are likely to chemically explode due to various reasons such as strong external impact, short circuits between electrodes, or electrolyte leakage. For example, if an overcurrent flows through a secondary battery, the internal temperature of the secondary battery rises rapidly. The rapid increase in temperature may cause a decomposition reaction of the electrolyte to produce gas. In this case, expansion of the battery case due to increased pressure in the battery case may occur, and if the expansion worsens, the secondary battery may ignite or explode.

[0007] In addition, in a battery module or battery pack, a large number of secondary batteries are housed in a sealed module housing or battery pack housing. Therefore, when the secondary batteries ignite, the gas generated will increase the internal pressure, causing collapse or a chain explosion. Therefore, conventional battery modules or battery packs (see KR Unexamined Patent Publication No. 10-2021-0091514) prevent pressure increases by installing a vent device in the module housing or battery pack housing that opens at a predetermined pressure, thereby discharging the gas to the outside.

[0008] However, conventional exhaust devices release flames and high-temperature particles when gases are exhausted. In particular, if flames leak outside the module housing or battery pack housing, the fire is more likely to spread to other battery modules or structures surrounding the battery pack housing. Therefore, exhaust devices are needed to prevent flames from leaking during exhaust. Summary of the Invention

[0009] Technical issues

[0010] The present disclosure aims to solve the problems of the related art, and thus the present disclosure aims to provide an exhaust device capable of discharging gas while preventing flames from leaking to the outside.

[0011] The technical problems that the present disclosure aims to solve are not limited to the above-mentioned problems, and other problems not mentioned above will be clearly understood by those skilled in the art from the description of the present invention described below.

[0012] Technical Solution

[0013] According to one aspect of the present disclosure, an exhaust device is provided. The exhaust device may include an inlet, an outlet, and a fluid flow path from the inlet to the outlet, wherein the fluid flow path may be configured to bend to block movement of flames.

[0014] The exhaust device may include: an inlet exhaust unit, which has the inlet and is configured to guide the airflow to a direction intersecting the inlet; and an outlet exhaust unit, which has the outlet, surrounds the outside of the inlet exhaust unit, and is configured to make the airflow from the inlet exhaust unit to the outlet bend at least once.

[0015] The inlet exhaust unit may include: a base portion having the inlet at its center; a blocking disk portion spaced apart from the base portion and positioned facing the inlet so as to block gas and flames; and an inlet side wall portion having an opening and configured to connect an edge of the base portion and an edge of the blocking disk portion.

[0016] The inlet side wall portion may include a plurality of openings, and a partition may be provided between the plurality of openings.

[0017] The inlet exhaust unit may include a gas permeation-proof membrane configured to cover the opening.

[0018] The gas permeation preventing film may be made of a material that melts when heated.

[0019] The outlet exhaust unit may include: an exhaust disk portion, which is spaced apart from the blocking disk portion and has the outlet opposite to the inlet, wherein the blocking disk portion is inserted between the inlet and the outlet; and an outlet side wall portion, which is spaced apart from the inlet side wall portion, surrounds the periphery of the inlet side wall portion, and is connected to the exhaust disk portion perpendicular thereto.

[0020] The outlet sidewall portion may include a drain pocket configured by a concave inner surface.

[0021] The exhaust disk portion may be larger than the blocking disk portion, and the outlet may have a smaller diameter than the blocking disk portion.

[0022] The inlet exhaust unit may include a spacer protruding from the blocking disk portion toward the exhaust disk portion.

[0023] The outlet exhaust unit may include a base connecting portion connected to the outlet side wall portion perpendicular thereto and press-fitted to or clamped by the inlet exhaust unit.

[0024] The blocking disk portion may include a plurality of protrusions protruding from a surface opposite to the inlet.

[0025] The plurality of protrusions may have an arc shape.

[0026] According to another aspect of the present disclosure, a battery module including the above-mentioned exhaust device is provided.

[0027] According to another aspect of the present disclosure, a battery pack including the above-mentioned exhaust device is provided.

[0028] Beneficial effects

[0029] According to one aspect of the present disclosure, an exhaust device capable of exhausting gas without leaking flame to the outside may be provided.

[0030] The exhaust device according to one aspect of the present disclosure is configured such that the flow path has a plurality of bends, so that it has high resistance to the flow of flames / sparks. Therefore, the flames / sparks can be extinguished inside the exhaust device or may not leak to the outside.

[0031] Furthermore, according to another aspect of the present disclosure, a drain bag is applied to the drain device to prevent clogging of the flow path.

[0032] In addition, according to another aspect of the present disclosure, since a gas permeation-proof membrane is applied to the fluid flow path between the outlet and the inlet to prevent air (oxygen) from passing through the exhaust device under normal conditions, it is possible to prevent air from flowing from the outside of the structure to the inside thereof during initial ignition of a structure to which the exhaust device is applied (e.g., a battery module or battery pack).

[0033] Effects obtainable from the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned above will be clearly understood by those skilled in the art from the description of the present invention described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a perspective view schematically illustrating a battery pack to which an exhaust device is applied according to an embodiment of the present disclosure.

[0035] Figure 2 is a perspective view schematically showing an exhaust device according to one embodiment of the present disclosure.

[0036] Figure 3 yes Figure 2 A partially exploded perspective view of the exhaust device in FIG.

[0037] Figure 4 yes Figure 3 Exploded perspective view of the inlet exhaust unit.

[0038] Figure 5 It is along Figure 2 A longitudinal cross-sectional view of the exhaust device taken along line AA'.

[0039] Figure 6 It is along Figure 2 A transverse cross-sectional view of the exhaust device taken along line BB'.

[0040] Figure 7 is a perspective view schematically showing an exhaust device according to another embodiment of the present disclosure.

[0041] Figure 8 yes Figure 7 A partially exploded perspective view of the exhaust device in FIG.

[0042] Figure 9 It is along Figure 7 A longitudinal sectional view of the exhaust device taken along line CC'.

[0043] Figure 10 yes Figure 9 A partial enlarged view of area “J1” in FIG.

[0044] Figure 11 corresponds to Figure 5 The figure shows Figure 5A modification of the exhaust system in.

[0045] Figure 12 yes Figure 11 A partial enlarged view of .

[0046] Figure 13 corresponds to Figure 5 The figure shows Figure 5 Another modification of the exhaust system in.

[0047] Figure 14 yes Figure 13 A partial enlarged view of . DETAILED DESCRIPTION

[0048] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terms used in the specification and the appended claims should not be interpreted as limited to general and dictionary meanings, but should be interpreted according to the meanings and concepts corresponding to the technical aspects of the present disclosure on the basis of the principle that the inventor is allowed to appropriately define the terms for the best interpretation. Therefore, the configurations proposed in the embodiments of this specification and the drawings only represent the most preferred embodiments of the present disclosure and do not represent all technical concepts of the present disclosure. Therefore, it should be understood that various equivalents and modifications may be made to them when filing an application.

[0049] Additionally, descriptions of related known functions or configurations that may obscure the subject matter of the present disclosure will be omitted.

[0050] The embodiments of the present disclosure are presented to those skilled in the art for further description of the present disclosure. Therefore, for the convenience of explanation and description, the shapes and sizes of the various elements in the drawings may be exaggerated, omitted or simplified. Therefore, the sizes of the corresponding elements do not fully reflect their actual sizes.

[0051] The exhaust device described below may refer to a device that discharges gas to the outside of the closed structure when gas is generated in the closed structure to relieve the increase in internal pressure of the structure. The exhaust device may be installed in the battery pack case 21 of the battery pack 20 or the module case of the battery module.

[0052] Specifically, for example, the exhaust device 10 may be mounted on one wall of the battery pack housing 21, such as Figure 1 As shown. The battery pack housing 21 may have a gas discharge hole (not shown) in which the exhaust device 10 will be installed, and the inlet K1 of the exhaust device 10 may be configured to communicate with the gas discharge hole. Therefore, when an ignition occurs inside the battery pack, gas can be discharged to the outside of the battery pack 20 through the exhaust device 10.

[0053] Figure 2 is a perspective view schematically showing an exhaust device according to one embodiment of the present disclosure, Figure 3 yes Figure 2 A partially exploded perspective view of the exhaust device in FIG. Figure 4 yes Figure 3 An exploded perspective view of the inlet exhaust unit in FIG. Figure 5 It is along Figure 2 A longitudinal sectional view of the exhaust device taken along line AA' in FIG. Figure 6 It is along Figure 2 A transverse cross-sectional view of the exhaust device taken along line BB'.

[0054] Referring to these drawings, an exhaust device 10 according to one embodiment of the present disclosure includes an inlet K1 , an outlet K2 , and fluid flow paths P1 to P3 through which gas may move from the inlet K1 to the outlet K2 .

[0055] In particular, the exhaust device 10 according to one embodiment of the present disclosure is configured such that the fluid flow paths P1 to P3 are bent one or more times. Figure 5 As shown, the exhaust device is configured so that the fluid flow paths P1 to P3 are bent relative to the inflow direction of the gas entering the inlet K1 from the battery pack case 21. Therefore, the gas passes through the exhaust device 10 and is discharged to the outside by passing through the fluid flow paths P1 to P3 that are bent multiple times, as shown in FIG. Figure 5 In this case, whenever the flame is blocked at a location where the fluid flow paths P1 to P3 are bent, the straight-line mobility and intensity of the flame are significantly reduced.

[0056] As will be described in detail later, the exhaust device 10 according to the present disclosure has fluid flow paths P1 to P3 that have very high resistance. Therefore, gas can pass through the exhaust device 10, but flames may be extinguished inside the exhaust device 10 or may not easily leak to the outside. In addition, when gas moves through the exhaust device 10 according to the present disclosure, strong vortices may be generated inside the exhaust device 10, and these strong vortices promote the extinguishing of sparks or flames and make them more difficult to dissipate.

[0057] Specifically, refer to Figure 2 and Figure 3 , the exhaust device 10 according to one embodiment of the present disclosure may include an inlet exhaust unit 100 and an outlet exhaust unit 200 .

[0058] The inlet exhaust unit 100 may have an inlet K1 and may be configured to direct the airflow in a direction intersecting the inlet K1. Figure 3As shown, the inlet exhaust unit 100 is configured in a cylindrical form and has an inlet K1 at the lower side of the inlet exhaust unit 100 and a closed upper side, so that the gas introduced through the inlet K1 is guided in a direction crossing the inlet K1. That is, as shown in FIG. Figure 5 As shown, gas or flame can enter the internal space of the inlet exhaust unit 100 through the inlet K1. However, the side facing the inlet K1 is blocked in the +Z direction, so the airflow is guided in a direction intersecting the inlet K1. At this time, the flame is initially blocked and can be prevented from leaking to the outside.

[0059] Describe the main structure of the inlet exhaust unit 100, as shown in Figure 4 and Figure 5 As shown, the inlet exhaust unit 100 includes a base portion 110, a blocking disk portion 120 and an inlet side wall portion 130, the base portion 110 having an inlet K1 in the center, the blocking disk portion 120 being spaced apart from the base portion 110 and positioned facing the inlet K1 to block gas and flame, and the inlet side wall portion 130 having an opening 131 and connecting the edge of the base portion 110 and the edge of the blocking disk portion 120.

[0060] The base portion 110 and the blocking disk portion 120 may constitute Figure 3 The lower plate and the upper plate of the cylindrical inlet exhaust unit 100, and the inlet side wall portion 130 can constitute a cylindrical side surface or a thickness surface.

[0061] For reference, the inlet K1 of the base portion 110 can be configured to communicate with the gas discharge hole (not shown) of the battery pack housing 21, and the edge of the base portion 110 can be in contact with the outer surface of the battery pack housing 21 surrounding the gas discharge hole and fixed thereto by bolt connection, etc.

[0062] The blocking disk portion 120 may be configured to have a larger area than the inlet K1 of the base portion 110. Since the area of ​​the blocking disk portion 120 is configured to be larger than the diameter of the inlet K1, the flame entering through the inlet K1 can be prevented from leaking to the outside, and the flow of gas and flame can be guided toward the inlet sidewall portion 130 intersecting the inlet K1.

[0063] like Figure 4 As shown, the inlet sidewall portion 130 includes a plurality of openings 131 formed along the circumferential direction of the inlet exhaust unit 100 and a plurality of partitions 132 formed between the plurality of openings 131. The openings 131 and the partitions 132 may be alternately arranged along the circumferential direction of the inlet exhaust unit 100.

[0064] As mentioned above, Figure 5As shown, since the opening 131 is provided in the inlet sidewall portion 130 , gas may enter the inner space of the inlet exhaust unit 100 through the inlet K1 and be exhausted to the outside of the inlet exhaust unit 100 through the opening 131 .

[0065] At this time, the partition 132 (such as Figure 6 The area indicated by "Q1" in the figure may act as an obstacle that hinders the movement of the flame. In addition, since the gas may collide with the surrounding partitions when flowing into the opening 131, a strong vortex may be generated, and the flame may be extinguished or stagnant due to the strong vortex.

[0066] The inlet exhaust unit 100 may include a gas permeation-proof membrane 140 covering the opening 131. The gas permeation-proof membrane 140 generally functions to block air (oxygen) from passing through the opening 131.

[0067] Reference Figure 3 and Figure 4 , a gas permeation preventing film 140 may be attached to the surface of the inlet sidewall portion 130 along the periphery of the inlet sidewall portion 130 to cover all the openings 131. The gas permeation preventing film 140 may be configured to have a width and length corresponding to the periphery of the inlet sidewall portion 130. Alternatively, only the openings 131 may be covered using several sheets of gas permeation preventing film 140 having a size corresponding to the openings 131.

[0068] The gas permeation preventing film 140 may be made of a material that melts when heated. For example, an ethylene-vinyl alcohol copolymer (EVOH) film may be used as the gas permeation preventing film 140.

[0069] As described above, since the opening 131 of the inlet exhaust unit 100 is blocked by the gas permeation-proof membrane 140, moisture and other foreign substances can be prevented from flowing from the outside of the battery pack 20 to the inside of the battery pack 20 (see FIG. Figure 1 ). In addition, if air (oxygen) flows into the interior of the battery pack 20 when ignition of the battery pack 20 begins, combustion can proceed very quickly. Since the gas permeation-proof membrane 140 is applied to the exhaust device 10 in the present disclosure, air (oxygen) does not flow from the outside of the battery pack 20 to the inside when ignition of the battery pack 20 begins. This can delay the combustion of the battery pack 20.

[0070] In addition, if the ignition of the battery pack 20 is intensified so that a large amount of gas and flame are generated inside, the gas permeation prevention membrane 140 can be melted by the heat of the gas and flame, so that the opening 131 of the inlet side wall portion 130 can be opened, and at this time, the gas can pass through the exhaust device 10 and be discharged to the outside of the battery pack 20.

[0071] That is, the exhaust device 10 according to the present disclosure is configured so that when gas or flame is generated, the gas permeation prevention film 140 is removed by heat to open the opening 131, thereby allowing gas to pass through, and so that the opening 131 is closed in a normal state to prevent air (oxygen) from passing through.

[0072] The outlet exhaust unit 200 has an outlet K2, surrounds the outside of the inlet exhaust unit 100, and is configured such that the air flow from the inlet exhaust unit 100 to the outlet K2 is bent at least once.

[0073] For example, Figure 2 and Figure 3 As shown, outlet exhaust unit 200 may have an outlet K2 on its upper side and may be configured to surround the entire outer periphery of inlet exhaust unit 100 and a portion of its upper side. Furthermore, when outlet exhaust unit 200 and inlet exhaust unit 100 are assembled with each other, outlet exhaust unit 200 and inlet exhaust unit 100 have a predetermined gap between the inner surface of outlet exhaust unit 200 and the outer surface of inlet exhaust unit 100. This gap may provide fluid flow paths P2 and P3, in which the airflow is bent one or more times between the outer side of inlet exhaust unit 100 and the inner side of outlet exhaust unit 200.

[0074] That is to say, if Figure 5 As shown, when the gas enters the space between the inlet exhaust unit 100 and the outlet exhaust unit 200 through the opening 131 of the inlet exhaust unit 100, since the space is blocked in the ±X-axis direction (or ±Y-axis direction) and the -Z-axis direction, the gas is guided in a direction intersecting the opening 131, and the airflow is bent again on the upper side of the outlet exhaust unit 200. Therefore, even the remaining flame that has passed through the inlet exhaust unit 100 can be blocked, thereby preventing the flame from leaking to the outside.

[0075] Reference Figure 2 、 Figure 3 and Figure 5 Describing the outlet exhaust unit 200 in more detail, the outlet exhaust unit 200 includes an exhaust disk portion 210 and an outlet sidewall portion 220 .

[0076] The exhaust disk portion 210 has an outlet K2 at its center and is positioned facing and spaced apart from the blocking disk portion 120 of the inlet exhaust unit 100 (see G1). The outlet K2 is positioned opposite the inlet K1 of the inlet exhaust unit 100, with the blocking disk portion 120 interposed between the outlet K2 and the inlet K1. Therefore, in the exhaust device 10 according to one embodiment of the present disclosure, although the inlet K1 and the outlet K2 are located in the same axial direction (the Z-axis direction), the blocking disk portion 120 is interposed between the inlet K1 and the outlet K2, thereby preventing the outflow of flames and allowing gas to flow by bypassing the blocking disk portion 120.

[0077] The exhaust disk portion 210 may be configured to be larger than the blocking disk portion 120, and the outlet K2 may have a smaller diameter than the blocking disk portion 120. That is, as Figure 2 and Figure 5 As shown, since the exhaust disk portion 210 is larger than the blocking disk portion 120, and since the outlet K2 is smaller than the blocking disk portion 120, the edge of the blocking disk portion 120 is shielded by the inner edge of the exhaust disk portion 210 so as not to be exposed. In this case, for example, Figure 5 Even if the flame is directed to a position outside the edge of the blocking disk portion 120 in the +Z direction, it is blocked by the inner edge of the exhaust disk portion 210 and does not leak to the outside of the exhaust device 10 .

[0078] The outlet sidewall portion 220 may be connected to the exhaust disk portion 210 perpendicular thereto so as to be spaced apart from the inlet sidewall portion 130 (see G2) and surround the periphery of the inlet sidewall portion 130. The outlet sidewall portion 220 may serve as a wall that blocks gas and flames exhausted from the opening 131 of the inlet sidewall portion 130 and guides airflow toward the exhaust disk portion 210.

[0079] In addition, the outlet sidewall portion 220 includes a drain pocket 222 formed by a concave inner surface thereof. Preferably, the drain pocket 222 may be provided at a position facing the opening 131 of the inlet sidewall portion 130.

[0080] When ignition occurs inside the battery pack 20, particles (e.g., electrode sheets separated from the electrode assembly and other ignition residues) as well as gas and flames may flow into the exhaust device 10. In this case, if particles accumulate inside the exhaust device 10, the fluid flow paths P1 to P3 may be blocked, so that the exhaust device 10 may not operate normally.

[0081] To prevent this, in the exhaust device 10 according to one embodiment of the present disclosure, the width of a portion (in the Z-axis direction) of the fluid flow path P1 to P3 between the inlet side wall portion 130 and the outlet side wall portion 220 is configured to be larger than the width of the other portions of the fluid flow path P1 to P3, such as Figure 5 Furthermore, since the exhaust device 10 is provided with the discharge pocket 222 in the outlet side wall portion 220 , the fluid flow paths P1 to P3 are less likely to be blocked.

[0082] In other words, the exhaust device 10 according to the present disclosure is configured so that the gap G2 between the inlet side wall portion 130 and the outlet side wall portion 220 (in which particles are relatively easy to accumulate) is larger than the gap G1 between the blocking disk portion 120 and the exhaust disk portion 210, and so that the recessed discharge bag 222 is further provided on the inner surface of the outlet side wall portion 220 so that particles can accumulate in the discharge bag 222.

[0083] According to the above configuration, particles can be collected in the largest space inside the exhaust device, thereby reducing the risk of clogging of the fluid flow path and preventing high-temperature particles that may cause ignition outside the battery pack from leaking to the outside.

[0084] Reference Figure 5 The outlet exhaust unit 200 may further include a base connection portion 230. The base connection portion 230 may be connected to the outlet sidewall portion 220 perpendicular thereto, and may be connected to the base portion 110 of the inlet exhaust unit 100 on the same plane.

[0085] The base connection portion 230 may serve to support the periphery of the inlet exhaust unit 100 and hold the inlet exhaust unit 100 , and to prevent the gas passing through the opening 131 of the inlet sidewall portion 130 from moving in the Z-axis direction.

[0086] However, in some cases, the base connection portion 230 may be omitted. For example, when the exhaust device 10 is fixed to the outer surface of the battery pack case 21, if the gas discharge hole of the battery pack case 21 is smaller than the base portion 110 of the inlet exhaust unit, and if the air flow in the -Z-axis direction is blocked by the outer surface of the battery pack case 21 between the inlet side wall portion 130 and the outlet side wall portion 220, the base connection portion 230 may be omitted.

[0087] According to the configuration and operation of the exhaust device 10 of the embodiment of the present disclosure described above, when a thermal event occurs in the battery module or battery pack 20, gas can be allowed to pass, but the flame can be dissipated or can be restricted to move inside the exhaust device 10 so that it cannot be leaked to the outside. In addition, since the exhaust device 10 includes the discharge bag 222, it is possible to prevent high-temperature particles from flowing out to the outside and blocking the flow paths P1 to P3. In addition, since the exhaust device 10 includes the gas permeation-proof membrane 140, it is possible to prevent air (oxygen) from flowing from the outside of the structure to the inside during the initial ignition of the structure to which the exhaust device 10 is applied (e.g., the battery module or battery pack 20).

[0088] Figure 7 is a perspective view schematically showing an exhaust device 10 according to another embodiment of the present disclosure, Figure 8 yes Figure 7 A partially exploded perspective view of the exhaust device 10 in FIG. Figure 9 It is along Figure 7 A longitudinal sectional view of the exhaust device 10 taken along line CC' in FIG. Figure 10 yes Figure 9 A partial enlarged view of area “J1” in FIG.

[0089] Next, we will refer to Figures 7 to 10 An exhaust device 10 according to another embodiment of the present disclosure will be described.

[0090] The same reference numerals as in the above-described embodiment denote the same components, and redundant description of the same components will be omitted, and the description will focus on differences from the above-described embodiment.

[0091] An exhaust apparatus 10 according to another embodiment of the present disclosure is different from the exhaust apparatus 10 according to the above embodiment in that an inlet exhaust unit 100A further includes a spacer 121 , and a base connection portion 230 and the base portion 110 are connected in a different manner.

[0092] Reference Figures 7 to 9 In the present embodiment of the present disclosure, the spacers 121 may be configured to protrude from the blocking disk portion 120 toward the exhaust disk portion 210. Here, the protrusion length of the spacers 121 may correspond to the gap G1 between the blocking disk portion 120 and the exhaust disk portion 210. In addition, preferably, the spacers 121 may be located in the edge region of the blocking disk portion 120 and may be arranged at regular intervals along the circumferential direction of the blocking disk portion 120.

[0093] In the exhaust device 10 according to the above-described embodiment, when a thermal event occurs in the battery pack 20, the gas and flame directed from the inlet K1 toward the barrier disk portion 120 exert a continuous and strong impact on the barrier disk portion 120. As a result, the inlet exhaust unit 100 may be pushed relative to the outlet exhaust unit 200 in the +Z-axis direction. If the barrier disk portion 120 and the exhaust disk portion 210 thereby come into contact with each other, the fluid flow paths P1 to P3 may be blocked. Furthermore, if the pressure of the gas and flame is extremely severe, the barrier disk portion 120 may be detached from the inlet exhaust unit 100.

[0094] However, according to the present embodiment of the present disclosure, when the pressure of the gas and flame acts on the blocking disk portion 120 as described above, the spacer 121 is used to prevent the inlet exhaust unit 100 from moving relative to the outlet exhaust unit 200 in the +Z-axis direction, so that the gap between the blocking disk portion 120 and the exhaust disk portion 210 can be maintained constant. Therefore, compared with the above embodiment, in the present embodiment of the present disclosure, when the gas passes through the exhaust device 10, the fluid flow paths P1 to P3 can be more stably maintained.

[0095] In addition, if Figure 9 and Figure 10 As shown, an outlet exhaust unit 200 according to another embodiment of the present disclosure includes a base connection portion 230 that is connected to an outlet sidewall portion 220 perpendicular thereto and is press-fitted to or clamped by the inlet exhaust unit 100A. For example, the base connection portion 230 may have an engagement member 231, and the base portion 110 of the inlet exhaust unit 100A may have an engagement recess 111 that can engage with and release from the engagement member.

[0096] That is to say, if Figure 10 As shown, the base portion 110 of the inlet exhaust unit 100 and the base connection portion 230 of the outlet exhaust unit 200 are configured to be engaged with each other by fitting, thereby improving assembly, fixation, and airtightness between the inlet exhaust unit 100 and the outlet exhaust unit 200 .

[0097] Figure 11 corresponds to Figure 5 The figure shows Figure 5 A modification of the exhaust device 10, Figure 12 yes Figure 11 A partial enlarged view of Figure 13 corresponds to Figure 5 The figure shows Figure 5 Another modification of the exhaust device 10, and Figure 14 yes Figure 13 A partial enlarged view of .

[0098] Next, we will refer to Figures 11 to 14 Variations of the baffle plate in the exhaust device 10 according to the present disclosure will be briefly described.

[0099] The blocking disk portion 120 of the inlet exhaust unit 100 may include a plurality of protrusions 122 and 123 protruding from a surface opposite to the inlet K1. The plurality of protrusions 122 and 123 may be provided on the entire surface of the blocking disk portion 120 so as to be spaced apart from each other.

[0100] For example, Figure 11 As shown in the embodiment of FIG, the protrusion 122 can be configured as a square shape. Figure 13 As shown in the embodiment of FIG, the protrusion 123 may be configured as an arc shape. Here, the arc shape may be configured to open toward the imaginary center line CL, bisect the length of the blocking disk portion 120, and close toward the edge of the blocking disk portion 120.

[0101] like Figure 12 or Figure 14 As shown, these protrusions 122 and 123 can be used to prevent flames or particles from moving along the surface of the blocking disk and cause them to return to the inlet K1 (in the -Z axis direction). In addition, the plurality of protrusions 122 and 123 can effectively increase the rigidity of the blocking disk portion 120. In addition, the plurality of protrusions 122 and 123 can effectively generate vortices that promote flame extinguishing.

[0102] Although not shown for ease of illustration, the battery module according to the present disclosure may include the aforementioned exhaust device 10. Furthermore, the battery module may further include one or more battery cells and a module housing having an interior space capable of accommodating the one or more battery cells. The exhaust device 10 may be secured to one side of the module housing.

[0103] The battery pack 20 according to the present disclosure may include the exhaust device 10 described above, such as Figure 1 The battery pack 20 may further include one or more battery modules and a battery pack housing 21 having an inner space capable of accommodating the one or more battery modules.

[0104] As described above, although the present disclosure has been described with reference to limited embodiments and drawings, the present disclosure is not limited thereto, and those skilled in the art to which the present disclosure pertains may make various modifications and changes within the technical concept of the present disclosure and the equivalent scope of the claims.

[0105] In addition, although terms indicating directions such as upward, downward, left, right, forward, and backward directions are used in this specification, it is obvious to those skilled in the art that these terms are merely for convenience of explanation and may vary depending on the position of the target object or the position of the observer.

Claims

1. An exhaust device, comprising: an inlet, an outlet, and a fluid flow path from the inlet to the outlet, Wherein, the fluid flow path is configured to be curved to block the movement of flames.

2. The exhaust device according to claim 1, comprising: an inlet exhaust unit having the inlet and configured to direct airflow in a direction intersecting the inlet; as well as An outlet exhaust unit having the outlet surrounds an outer side of the inlet exhaust unit and is configured such that the airflow from the inlet exhaust unit to the outlet is bent at least once.

3. The exhaust device according to claim 2, in, The inlet exhaust unit comprises: a base portion having the inlet at a center of the base portion; a blocking disc portion spaced apart from the base portion and positioned facing the inlet so as to block gas and flames; and An inlet side wall portion has an opening and is configured to connect an edge of the base portion and an edge of the blocking disk portion.

4. The exhaust device according to claim 3, in, The inlet side wall portion comprises: A plurality of openings and a partition disposed between the plurality of openings.

5. The exhaust device according to claim 3, in, The inlet exhaust unit comprises: A gas permeation preventing film is configured to cover the opening.

6. The exhaust device according to claim 5, in, The gas permeation preventing film is made of a material that melts when heated.

7. The exhaust device according to claim 3, in, The outlet exhaust unit comprises: an exhaust disk portion spaced apart from the blocking disk portion and having the outlet opposite to the inlet, and the blocking disk portion is interposed between the inlet and the outlet; and An outlet side wall portion is spaced apart from the inlet side wall portion, surrounds a periphery of the inlet side wall portion, and is connected to the exhaust disk portion perpendicular to the outlet side wall portion.

8. The exhaust device according to claim 7, in, The outlet side wall portion comprises: A drain bag is configured by a concave inner surface.

9. The exhaust device according to claim 7, in, The exhaust disk portion is larger than the blocking disk portion, and Wherein, the diameter of the outlet is smaller than the diameter of the blocking disk portion.

10. The exhaust device according to claim 7, in, The inlet exhaust unit includes a spacer protruding from the blocking disk portion toward the exhaust disk portion.

11. The exhaust device according to claim 7, in, The outlet exhaust unit includes a base connection portion connected to the outlet side wall portion perpendicular to the base connection portion and press-fitted to or clamped by the inlet exhaust unit.

12. The exhaust device according to claim 3, in, The blocking disk portion comprises: A plurality of protrusions protrude from a surface opposite the inlet.

13. The exhaust device according to claim 12, in, The plurality of protrusions have an arc shape. 14 . A battery module, comprising the exhaust device according to claim 1 .

15. A battery pack comprising the exhaust device according to any one of claims 1 to 13.

Images