Battery module and battery pack with enhanced safety

Abstract

The present application provides a battery module that enables to improve safety by appropriate control of exhaust gas at the time of a thermal event in the battery module. The battery module according to one aspect of the present application includes: a cell assembly including one or more battery cells; a module case that accommodates the cell assembly in an inner space thereof and has an exhaust hole formed to allow exhaust gas generated to be discharged from the cell assembly; and an exhaust unit provided outside the module case, the exhaust unit having an exhaust passage formed to allow the exhaust gas discharged from the exhaust hole to be introduced and then discharged to the outside, and the exhaust unit having a protruding portion configured in a shape of protruding from an inside of the exhaust passage toward an outer surface of the module case.

Description

Technical Field

[0001] This application claims priority to Korean Patent Application 10-2021-0090554, filed on July 9, 2021, the disclosure of which is incorporated herein by reference.

[0002] This disclosure relates to a battery, and more specifically to a battery module and battery pack with enhanced safety, and a vehicle including the battery. Background Technology

[0003] With the rapidly increasing demand for portable electronic products such as laptops, cameras, and mobile phones, and the urgent need for the commercialization of robots and electric vehicles, there is active research into high-performance rechargeable batteries that can be repeatedly charged and discharged.

[0004] Currently commercially available rechargeable batteries include nickel-cadmium (NiCd), nickel-metal hydride (NiMH), nickel-zinc (NiZn), and lithium-ion batteries. Among these, lithium-ion batteries exhibit virtually no memory effect compared to nickel-based batteries, ensuring free charging and discharging. Furthermore, lithium-ion batteries have attracted attention due to their very low discharge rate and high energy density.

[0005] Lithium-ion secondary batteries primarily use lithium-based oxides and carbon materials as positive and negative electrode active materials. A lithium-ion secondary battery includes: an electrode assembly, in which positive and negative electrode plates, respectively coated with positive and negative electrode active materials, are separated by a separator; and an external or battery casing, which hermetically houses the electrode assembly and the electrolyte together.

[0006] Generally, based on their external shape, lithium secondary batteries can be classified into can-type secondary batteries with electrode assemblies included in a metal can and bag-type secondary batteries with electrode assemblies included in a bag with an aluminum laminate.

[0007] Recently, secondary batteries have been widely used not only in small devices such as portable electronic devices, but also in medium and large devices such as electric vehicles and energy storage systems (ESS) for driving or energy storage. These secondary batteries can be configured into a battery module in such a way that multiple secondary batteries are electrically connected and stored together in a module housing. Furthermore, multiple battery modules can be connected to form a battery pack.

[0008] However, when multiple battery modules are included in a battery pack as described above, the structure may be susceptible to thermal chain reactions between the battery modules. For example, when an event such as thermal runaway occurs within one battery module, the propagation of thermal runaway to other battery modules needs to be prevented. If the propagation of thermal runaway between battery modules is not prevented, an event occurring in a particular battery module can lead to a chain reaction affecting several battery modules, which could result in an explosion, fire, or escalation.

[0009] Specifically, when an event such as thermal runaway occurs in any of the battery modules, gases or flames can be vented to the outside. If the venting of these gases or flames is not properly controlled, they can be directed towards other battery modules, potentially leading to a thermal chain reaction in those modules. Furthermore, when a thermal event occurs inside a battery module, ignition-prone factors (such as sparks, electrode emissions, and carbides) can be generated along with a large amount of combustible gas. Additionally, when ignition-inducing factors are released along with the gases, they can come into contact with oxygen and ignite a fire. Summary of the Invention

[0010] Technical issues

[0011] This disclosure is designed to address problems in the related art, and therefore aims to provide a battery module with an improved structure, as well as a battery pack and a vehicle including the battery module, to improve safety by properly controlling the emission of gases or sparks when a thermal event occurs inside the battery module.

[0012] However, the technical problems to be solved by this disclosure are not limited to those described above, and those skilled in the art can clearly understand other problems not mentioned herein based on the following disclosure.

[0013] Technical solution

[0014] In one aspect of this disclosure, a battery module is provided, the battery module comprising: a unit assembly having at least one battery cell; a module housing configured to receive the unit assembly within an interior space of the module housing and having an exhaust port formed in the module housing to discharge exhaust gas generated from the unit assembly; and an exhaust unit disposed on the outside of the module housing and having an exhaust passage such that exhaust gas discharged from the exhaust port is introduced into the exhaust unit and discharged to the outside, the exhaust unit having a protrusion configured to project from the interior of the exhaust passage toward the outer surface of the module housing.

[0015] Here, multiple protrusions can be arranged along the flow direction of the exhaust gas.

[0016] In addition, the exhaust unit may also include: a plate portion formed in a plate shape such that the protrusion is located on the inner surface of the plate portion; and an edge portion that protrudes from the edge of the plate portion toward the outer surface of the module housing and is connected to the outer surface of the module housing.

[0017] Furthermore, the protrusion may be configured such that its width in the same direction as the flow direction of the exhaust gas is greater than or equal to its width in the direction orthogonal to the flow direction of the exhaust gas.

[0018] Furthermore, the exhaust unit may have an empty space formed inside the protrusion.

[0019] Furthermore, the exhaust unit can be configured such that the outer surface of the portion forming the protrusion is recessed toward the outer surface of the module housing.

[0020] In addition, the exhaust unit may have a protrusion or groove formed on the surface of the protrusion.

[0021] In addition, the exhaust unit may also include an adhesive member having a material with adhesive properties and positioned on the inner surface of the exhaust passage.

[0022] Furthermore, the protrusion can be configured to have a width that gradually increases toward the inner end.

[0023] In another aspect of this disclosure, a battery pack including a battery module according to this disclosure is also provided.

[0024] In another aspect of this disclosure, a battery pack is also provided, the battery pack comprising: at least one battery module; a battery pack housing configured to receive the at least one battery module in an internal space of the battery pack housing and having a battery pack opening formed in the battery pack housing; and an exhaust unit mounted to the battery pack housing and having an exhaust passage such that exhaust gas discharged from the battery pack opening is introduced into the exhaust unit and discharged to the outside, the exhaust unit having a protrusion configured to project from the interior of the exhaust passage toward the outer surface of the battery pack housing.

[0025] In another aspect of this disclosure, a vehicle including a battery module according to this disclosure is also provided.

[0026] Beneficial effects

[0027] According to this disclosure, when a thermal event occurs inside a specific battery module or battery pack, gases and heat can be rapidly discharged to the outside, and the occurrence or spread of fire can be prevented.

[0028] Specifically, according to the embodiments of this disclosure, since the exhaust path is non-linearly formed, gases and heat can be discharged rapidly, and sparks, electrode emissions, carbides, etc. can be prevented from being discharged to the outside of the module with a strong linearity.

[0029] Therefore, in this case, a fire outside the battery module can be prevented by preventing materials such as sparks or electrode emissions (which can be ignition factors) from coming into contact with oxygen outside the module.

[0030] Furthermore, according to embodiments of this disclosure, even if a flame occurs inside the battery module, the resulting flame is prevented from being emitted to the outside of the battery module, thereby preventing the thermal event from spreading to other battery modules.

[0031] Furthermore, according to embodiments of this disclosure, a simple structure can be used to control the venting of the battery module and prevent the spread of heat / flame between battery modules.

[0032] In addition to the effects described above, this disclosure may also have various other effects, and such effects will be described in each embodiment, or any effects that can be readily inferred by those skilled in the art will not be described in detail. Attached Figure Description

[0033] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the foregoing disclosure, serve to provide a further understanding of the technical features of the present disclosure; therefore, the present disclosure is not to be construed as limited to the drawings.

[0034] Figure 1 This is a schematic perspective view of an assembled battery module according to an embodiment of the present disclosure.

[0035] Figure 2 It is shown Figure 1 An exploded 3D view of some of the components.

[0036] Figure 3 This is a perspective view schematically showing the structure of an exhaust unit according to an embodiment of the present disclosure.

[0037] Figure 4 It is viewed from the front. Figure 3 A schematic diagram of the cross-sectional structure of the exhaust unit attached to the module housing.

[0038] Figure 5 This is an enlarged view showing the structure of the portion in which the protrusion is formed in an exhaust unit according to an embodiment of the present disclosure.

[0039] Figure 6 This is a cross-sectional view schematically showing a partial structure of an exhaust unit according to an embodiment of the present disclosure.

[0040] Figure 7 This is a schematic cross-sectional view showing a partial structure of an exhaust unit according to another embodiment of the present disclosure.

[0041] Figure 8 This shows the view from the top. Figure 7 A cross-sectional view of the structure of the exhaust unit attached to the module housing.

[0042] Figure 9 This is a schematic top cross-sectional view illustrating the structure of the protrusion according to another embodiment of the present disclosure.

[0043] Figure 10 This is a schematic front view showing a partial structure of an exhaust unit having a protruding form according to another embodiment of the present disclosure.

[0044] Figure 11 It is a section taken from the top along line B1-B1'. Figure 10 A cross-sectional view of the exhaust unit connected to the module housing.

[0045] Figure 12 This is a schematic top cross-sectional view showing a partial structure of an exhaust unit connected to a module housing according to another embodiment of the present disclosure.

[0046] Figure 13 This is a schematic top cross-sectional view showing a partial structure of an exhaust unit connected to a module housing according to another embodiment of the present disclosure.

[0047] Figure 14 This is a schematic top cross-sectional view showing a partial structure of an exhaust unit connected to a module housing according to another embodiment of the present disclosure.

[0048] Figure 15 and Figure 16 This is a perspective view schematically illustrating the construction of an exhaust unit according to various other embodiments of the present disclosure.

[0049] Figure 17 This is a perspective view schematically illustrating the construction of a battery module according to another embodiment of the present disclosure.

[0050] Figure 18 This is a perspective view schematically illustrating the construction of a battery module according to yet another embodiment of the present disclosure.

[0051] Figure 19 This is a schematic diagram showing a battery pack according to an embodiment of the present disclosure, viewed from above.

[0052] Figure 20 This is a diagram showing a battery pack according to another embodiment of the present disclosure, viewed from top. Detailed Implementation

[0053] Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Before the description, it should be understood that the terminology used in the specification and appended claims should not be construed as limited to its general and dictionary meaning, but rather as interpreted based on the meaning and concept corresponding to the technical aspects of the present disclosure, in accordance with the principle that allows the inventors to appropriately define the terminology for the best interpretation.

[0054] Therefore, the description presented herein is merely a preferred example for illustrative purposes and is not intended to limit the scope of this disclosure. It should be understood that other equivalents and modifications may be made thereto without departing from the scope of this disclosure.

[0055] Figure 1 This is a schematic perspective view of an assembled battery module according to an embodiment of the present disclosure, and Figure 2 It is shown Figure 1 An exploded 3D view of some of the components.

[0056] Reference Figure 1 and Figure 2 The battery module according to this disclosure includes a unit assembly 100, a module housing 200, and an exhaust unit 300.

[0057] The unit assembly 100 may include at least one battery cell. Here, each battery cell may refer to a secondary battery. The secondary battery may include an electrode assembly, an electrolyte, and a battery casing. In particular, the battery cell disposed in the unit assembly 100 may be a pouch-type secondary battery. However, other types of secondary batteries, such as cylindrical or rectangular batteries, may also be used in the unit assembly 100 of this disclosure.

[0058] Multiple secondary batteries can be stacked to form the unit assembly 100. For example, multiple secondary batteries can be stacked such that they are vertically aligned in a vertical direction (z-axis direction in the figure) and horizontally aligned in a horizontal direction (x-axis direction in the figure). Each battery cell may include electrode leads, and the electrode leads may be located at both ends or one end of each battery cell. A secondary battery with electrode leads protruding in two directions may be referred to as a bidirectional battery, and a secondary battery with electrode leads protruding in one direction may be referred to as a unidirectional battery. This disclosure is not limited to the specific type or form of these secondary batteries, and various types of secondary batteries known at the time of filing of this application may be used in the unit assembly 100 of this disclosure.

[0059] The module housing 200 may have an empty space formed therein and is configured to accommodate the unit assembly 100 within the internal space. For example, the module housing 200 may be configured to include an upper plate, a lower plate, a left plate, a right plate, a front plate, and a rear plate to define the internal space. Here, at least two or more of the upper plate, lower plate, left plate, right plate, front plate, and rear plate may be constructed integrally. More specifically, the module housing 200 may be configured as a single-frame shape with a tubular shape, wherein the upper plate, lower plate, left plate, and right plate are integrally formed. Additionally, the front plate and rear plate may be connected to the front opening and rear opening of the single frame and are configured to be sealed.

[0060] The module housing 200 may have an exhaust port formed in at least one side thereof, such as Figure 2 As shown in H1. For example, vent H1 can be formed in the left and right plates of the module housing 200, respectively. Vent H1 can be configured such that when exhaust is generated and ejected from the unit assembly 100 housed in the internal space, the generated exhaust can be discharged to the external space of the module housing 200. For example, vent H1 can be formed in a fully open form, penetrating the module housing 200 in the inward and outward directions. However, vent H1 can not be fully open, but can be configured to be closed in the normal state and opened according to changes in pressure or temperature. In addition, vent H1 can be formed as elongated in one direction. For example, as shown in... Figure 2 As shown, the vent H1 can be formed as an elongated shape in the vertical direction. Furthermore, the vent H1 can be formed in the side surfaces of the module housing 200, particularly in the left and right surfaces. However, the vent H1 can also be formed in other parts of the module housing 200, such as the upper surface, lower surface, front surface, and / or rear surface. Moreover, the vent H1 formed in the module housing 200 can be configured in various shapes other than those described above.

[0061] The exhaust unit 300 can be disposed on the outside of the module housing 200. Specifically, the exhaust unit 300 can be attached to the portion of the module housing 200 where the exhaust port H1 is formed. For example, as... Figure 2 As shown, when the exhaust port H1 is formed in the left and right surfaces of the module housing 200, the exhaust unit 300 can be attached to the outside of each of the left and right surfaces of the module housing 200.

[0062] In addition, with Figure 2 Similar to the portion indicated by V, an exhaust passage can be formed in the exhaust unit 300. The exhaust passage V can be configured such that exhaust gas discharged from the exhaust port H1 of the module housing 200 is introduced into the exhaust passage V and discharged to the outside.

[0063] Reference Figure 3 and Figure 4The construction of the exhaust unit 300 is described in more detail.

[0064] Figure 3 This is a perspective view schematically illustrating the structure of the exhaust unit 300 according to an embodiment of the present disclosure, and Figure 4 It is viewed from the front. Figure 3 A schematic diagram of the cross-sectional structure of the exhaust unit 300 attached to the module housing 200. For example, Figure 3 and Figure 4 The exhaust unit 300 can be considered to be based on the exhaust unit located at Figure 1 and Figure 2 The exhaust unit 300 shown is located on the left side of the module housing 200 among the two exhaust units 300 shown.

[0065] Reference Figures 1 to 4 The exhaust unit 300 may have an exhaust passage V, which is formed such that exhaust gas discharged from the exhaust port H1 is introduced into it and discharged to the outside. Specifically, the exhaust unit 300 may have a protrusion 310 inside the exhaust passage V. The protrusion 310 may be configured to protrude from the interior of the exhaust passage V toward the outer surface of the module housing 200. For example, based on... Figure 4 The exhaust unit 300, which is attached to the left surface of the module housing 200, includes a protrusion 310 on the right surface, which may be referred to as the inner surface, and the protrusion 310 may be formed to protrude in the right direction.

[0066] According to the configuration of this disclosure, exhaust gas can flow in a curved manner through the protrusion 310. That is, when exhaust gas is introduced from the exhaust port H1 of the module housing 200 into the exhaust channel V of the exhaust unit 300, the exhaust gas can flow inside the exhaust channel V and be discharged to the outside through the discharge port Vo of the exhaust channel V. At this time, as the exhaust gas flows within the internal space of the exhaust channel V, it can collide with the protrusion 310, preventing the exhaust gas from flowing only in a straight direction, and allowing the flow direction to bend at predetermined points. Therefore, when the exhaust gas flows in the exhaust channel V, the exhaust gas can flow in a curved manner at least once or more, such as... Figure 3 As indicated by the arrow in the diagram. In other words, the exhaust unit 300 can be considered as being configured such that the exhaust flows non-linearly through the protrusion 310.

[0067] According to this embodiment of the present disclosure, since the exhaust flow direction is formed in a non-linear form, it is possible to effectively prevent sparks, electrode emissions, carbides, and the like with strong linearity from being discharged to the outside of the exhaust unit 300 along with the exhaust. Therefore, in this case, the problem of high-temperature sparks, electrode emissions, carbides, etc., coming into contact with oxygen outside the exhaust unit 300 and acting as an ignition source can be prevented.

[0068] Furthermore, in this specification, regarding the inner and outer sides, unless otherwise stated, the inner side may refer to the portion facing the center of the battery module, and the outer side may refer to its opposite direction. For example, the inner direction of the exhaust unit 300 may refer to the direction towards the module housing 200.

[0069] The protrusion 310 can be configured to contact the outer surface of the module housing 200. For example, refer to Figure 4 The exhaust unit 300 attached to the left side of the module housing 200 can be configured such that the right end of the protrusion 310 contacts the left surface of the module housing 200.

[0070] According to the configuration of this disclosure, an empty space may not be formed between the protrusion 310 and the module housing 200. Therefore, the empty space through which exhaust can flow in the exhaust passage V can be limited as follows: Figure 4 The space between the protrusions 310 shown in V1. Therefore, in this case, the flow direction of exhaust in the exhaust passage V can be more easily and reliably constructed into a non-linear shape, i.e., a curved shape.

[0071] Multiple protrusions 310 can be arranged along the exhaust flow direction. Here, the exhaust flow direction can be from the exhaust port H1 toward the discharge port Vo of the exhaust unit 300. For example, refer to... Figure 3 The direction of exhaust flow can be referred to as the -X-axis direction. In this case, multiple protrusions 310 are provided on the right surface of the left exhaust unit 300, and specifically, a number of protrusions 310 can be arranged in the -X-axis direction. Furthermore, the multiple protrusions 310 arranged along the exhaust flow direction can be configured to be spaced apart from each other by a predetermined distance. Exhaust can flow through this space. Additionally, the multiple protrusions 310 can be arranged alternately along the exhaust flow direction. For example, when the exhaust unit 300 is connected to the left and right sides of the module housing 200, the multiple protrusions 310 can be respectively arranged in the front-rear direction, and adjacent protrusions 310 can be configured to be located at different heights.

[0072] According to this embodiment of the present disclosure, since the plurality of protrusions 310 are arranged along the flow direction of the exhaust gas, it is easier to realize a structure that makes the flow direction of the exhaust gas bend several times.

[0073] Additionally, the multiple protrusions 310 can be arranged in a direction orthogonal to the exhaust flow direction. For example, refer to... Figure 3 and Figure 4 The direction orthogonal to the exhaust flow direction can be called the vertical direction (Z-axis direction). In this case, multiple protrusions 310 can be arranged vertically inside the exhaust passage V of the exhaust unit 300.

[0074] According to this embodiment, the flow of exhaust gas can be more easily formed in a non-linear manner.

[0075] In addition, the exhaust unit 300 may also include, for example Figure 3 and Figure 4 The plate portion 301 and the edge portion 302 are shown.

[0076] The plate portion 301 is formed in a plate shape and can be configured such that the protrusion 310 is positioned on the inner surface. For example, see Figure 3 The left exhaust unit 300 shown in the diagram has a plate portion 301 that can be formed as a plate that stands upright in the vertical direction, and a protrusion 310 that can be positioned on the right surface (the surface in the -Y axis direction) of the plate portion 301.

[0077] Edge portion 302 can protrude from the edge of plate portion 301 toward the outer surface of module housing 200 and can be configured to attach to the outer surface of module housing 200. For example, see Figure 3 and Figure 4 The left exhaust unit 300 shown has an edge portion 302 that protrudes to the right at the top (end in the +Z-axis direction), bottom (end in the -Z-axis direction), and front (end in the +X-axis direction) of the plate portion 301 and is attached to the left surface of the module housing 200. In this case, the edge portion 302 and the module housing 200 can be joined by welding. However, this disclosure is not limited to this type of connection, and they can be joined in various other ways, such as bolting or bonding.

[0078] According to the configuration disclosed herein, the structure and shape of the exhaust unit 300 are simple, making it very easy to manufacture and assemble. Specifically, as... Figure 3 and Figure 4 As shown, the exhaust unit 300 is configured such that one side (i.e., the right surface) of the exhaust passage V is fully open, allowing the entire open portion to be used as the inlet hole Vi of the exhaust passage V. Therefore, the position of the exhaust hole H1 within the module housing 200 is not significantly affected. In other words, based on this configuration, the inlet hole Vi of the exhaust passage V can be considered very large, thus eliminating the need for significant effort to precisely align the inlet hole Vi of the exhaust unit 300 with the position of the exhaust hole H1 on the surface of the module housing 200.

[0079] Furthermore, according to this configuration, the process of setting the protrusion 310 in the internal space of the exhaust passage V can be realized very easily. In particular, in this configuration, it can be considered that the protrusion 310 is completely exposed to the outside before the exhaust unit 300 is attached to the module housing 200. Therefore, since the protrusion 310 can be formed through the exposed side, the manufacturing or design process for setting the protrusion 310 in various shapes or arrangements inside the exhaust passage V can be performed smoothly.

[0080] Furthermore, according to this configuration, if the exhaust unit 300 with a simple structure is attached to the side surface of the module housing 200 where the exhaust port H1 is formed, the exhaust device can be easily provided for the battery module. Therefore, in this case, if the exhaust port H1 is formed in the module housing 200, the battery module according to this disclosure can be easily implemented even without changing the construction or design of the corresponding module housing 200.

[0081] Meanwhile, in this embodiment as described above, an edge portion 302 is not formed on a portion of the edge of the plate portion 301, or a portion of the edge portion 302 may be formed to have a small protrusion height. For example, see... Figure 3 In the illustrated embodiment, at least one of the four rectangular corners of the plate portion 301 may not have an edge portion 302 formed, such as the rear corner. Alternatively, the edge portion 302 may be formed at the other three corners of the plate portion 301. In this case, the rear edge of the rectangular plate portion 301 can be used as an exhaust port, as indicated by Vo, for the exhaust passage V. In the configuration of this exhaust unit 300, the left, top, and bottom surfaces of the exhaust passage V can be closed, its right surface can be opened to serve as an inlet port Vi, and its rear surface can be opened to serve as an exhaust port Vo.

[0082] The protrusion 310 can be configured such that its width in the same direction as the exhaust flow direction is greater than or equal to its width in the direction orthogonal to the exhaust flow direction. This will refer to... Figure 5 To describe in more detail.

[0083] Figure 5 This is an enlarged view showing the structure of the portion in which the protrusion 310 is formed in the exhaust unit 300 according to an embodiment of the present disclosure.

[0084] refer to Figure 5When the exhaust unit 300 is viewed from the module housing 200, the protrusion 310 can be configured to have a figure shape (such as a square) with a predetermined area. Specifically, relative to the protrusion 310, assuming a width of W1 in the front-to-back direction (X-axis direction) equivalent to the exhaust flow direction, and a width of W2 in the vertical direction (Z-axis direction) perpendicular to the exhaust flow direction inside the exhaust passage V, the following dimensional relationship can be established between W1 and W2.

[0085] W1≥W2

[0086] In other words, the protrusion 310 can be configured such that its width in the same direction as the exhaust flow direction is equal to or greater than its width in the direction orthogonal to the exhaust flow direction.

[0087] According to this embodiment of the present disclosure, the protrusion 310 does not deform even under high pressure of exhaust gas, and its shape can be stably maintained. That is, when exhaust gas flows inside the exhaust passage V, high pressure can be applied to the protrusion 310 instantaneously. At this time, according to this configuration, even if a large force is applied due to gas pressure, the protrusion 310 can stably maintain its shape, enabling the function of continuing to non-linearly shape the flow direction of exhaust gas.

[0088] Furthermore, this configuration increases the contact area between the end of the protrusion 310 and the module housing 200. Therefore, it prevents sparks or emissions from easily leaking into the gap between the end of the protrusion 310 and the module housing 200. Additionally, in this configuration, heat can be better transferred from the module housing 200 to the outside of the exhaust unit 300 via the protrusion 310, thus increasing the cooling performance of the battery module through the protrusion 310.

[0089] Furthermore, the venting unit 300 can be configured such that adhesive is inserted between the end of the protrusion 310 and the module housing 200. In this configuration, when the contact area between the end of the protrusion 310 and the module housing 200 is wider, it is easier to insert the adhesive.

[0090] According to the embodiment described above, where the adhesive is inserted between the end of the protrusion 310 and the module housing 200, the connection between the exhaust unit 300 and the module housing 200 can be further improved. Furthermore, in this case, when the exhaust unit 300 contacts the surface of the module housing 200 while the adhesive is applied to or attached to the end of the protrusion 310, the protrusion 310 and the module housing 200 can be fixed to each other. Therefore, when the edge portion 302 is joined to the module housing 200 by welding or the like, the exhaust unit 300 does not move, allowing the welding process to proceed more smoothly. Moreover, according to this configuration, the adhesive inserted between the end of the protrusion 310 and the module housing 200 more reliably prevents sparks or emissions from leaking into this gap.

[0091] At the same time, such as Figure 5 As shown, when viewed from the front, the protrusion 310 can be formed as a quadrilateral prism with an approximately rectangular shape, and this shape can be achieved in various ways. For example, when viewed from the front, the protrusion 310 can be formed as a circle, an ellipse, or other polygonal shapes. That is, the protrusion 310 can be formed as a cylinder, an elliptical cylinder, or a polygonal cylinder. Furthermore, when the protrusion 310 is formed as a polygonal cylinder, its corners or vertices can be rounded.

[0092] The exhaust unit 300 can be configured such that an empty space is formed inside the protrusion 310. This will refer to... Figure 6 To describe in more detail.

[0093] Figure 6 This is a schematic cross-sectional view showing a partial structure of the exhaust unit 300 according to an embodiment of the present disclosure. Specifically, Figure 6 This diagram can be considered schematically illustrating the cross-sectional structure of the protrusion 310 disposed in the exhaust unit 300 when viewed from above. For several embodiments in this specification, including this embodiment, features that are the same as or similar to those in other embodiments may not be described in detail, while features that differ from those in other embodiments will be described in detail.

[0094] refer to Figure 6 The protrusion 310 is formed to protrude from the exhaust unit 300 toward the module housing 200, and an empty space can be formed in the protrusion 310, as indicated by E1. In addition, air and the like can exist in the empty space.

[0095] According to the structure disclosed herein, an insulating layer is formed through the empty space E1 inside the protrusion 310, thereby reducing heat transfer through the protrusion 310.

[0096] In particular, in this embodiment, the protrusion 310 may have a hole formed to communicate with the internal space E1. For example, see... Figure 6 In one embodiment, as indicated by H2, a hole may be formed in at least one side of the protrusion 310. In this case, the protrusion 310 typically defines an internal space E1, and the internal space E1 can be connected to the exhaust passage V through the inlet hole H2.

[0097] Specifically, the inlet hole H2 of the protrusion 310 can be formed in a direction opposite to the direction of exhaust flow. For example, in Figure 6 In the configuration shown, when exhaust flows from the front end to the rear end (-X axis direction) of the exhaust unit 300 as indicated by arrow A1, the inlet hole H2 of the protrusion 310 can be formed on the surface at the front end.

[0098] According to the structure disclosed herein, the protrusion 310 can further enhance the effect of preventing the emission of sparks, electrode emissions, carbides, etc. For example, as Figure 6 As indicated by arrow A1, when spark or electrode emissions move together with the exhaust, spark or electrode emissions with strong linearity can be introduced into the internal space E1 of the protrusion 310 through the inlet H2. Furthermore, the spark or electrode emissions introduced into the internal space E1 of the protrusion 310 as described above can be retained within the internal space E1, preventing them from being discharged to the outside of the exhaust unit 300 along with the exhaust.

[0099] Figure 7 This is a schematic cross-sectional view showing a partial structure of an exhaust unit 300 according to another embodiment of the present disclosure. Furthermore, Figure 8 This shows the view from the top. Figure 7 A cross-sectional view of the structure of the exhaust unit 300 attached to the module housing 200. Specifically, Figure 8 It can be called Figure 6 This is a variation of the construction. This embodiment will also be described in detail based on features that differ from the aforementioned embodiments.

[0100] refer to Figure 7 and Figure 8The outer surface of the portion of the exhaust unit 300 where the protrusion 310 is located can be recessed toward the outer surface of the module housing 200, as shown in G1. That is, the protrusion 310 can be considered as being formed in a convex shape with respect to the inner surface of the exhaust unit 300 toward the outer surface of the module housing 200, but the module housing 200 can be considered as being formed in a concave shape with respect to the outer surface of the exhaust unit 300. Furthermore, since the recess G1 of the exhaust unit 300 can be formed by the protrusion 310 of the exhaust unit 300, the recess G1 can have a shape corresponding to the protrusion 310 of the exhaust unit 300. For example, the protrusion 310 can be formed in an approximately rectangular shape, and the recess G1 formed on the outer surface of the exhaust unit 300 can also be correspondingly formed in an approximately rectangular shape.

[0101] According to the configuration of this disclosure, the structure for forming the protrusion 310 in the exhaust unit 300 can be easily implemented. For example, the exhaust unit 300 is typically formed in the form of a plate, and multiple portions at the center are pressed inward to form the protrusion 310. Furthermore, according to the configuration of this disclosure, the outer surface area of ​​the exhaust unit 300 can be widened. Therefore, the cooling performance for exhaust gas or high-temperature gas discharged from the interior of the module housing 200 and flowing through the exhaust passage V can be improved. Furthermore, according to this configuration, the heat dissipation performance for heat transferred from the module housing 200 toward the exhaust unit 300 can be further improved. In particular, when the cooling flow path for cooling the battery module is located outside the exhaust unit 300, the cooling or heat dissipation efficiency of this embodiment according to this disclosure can be further increased.

[0102] The exhaust unit 300 can be configured such that a protrusion or recess is formed on the surface of the protrusion 310. This will refer to Figures 9 to 11 To describe in more detail.

[0103] Figure 9 This is a schematic top cross-sectional view illustrating the construction of the protrusion 310 according to another embodiment of the present disclosure. Specifically, Figure 9 It can be called Figure 6 This is a variation of the construction. This embodiment will also be described in detail based on features that differ from the aforementioned embodiments.

[0104] refer to Figure 9 The protrusion 310 of the exhaust unit 300 may have a groove formed on the side facing the exhaust, as indicated by G2. That is, as Figure 9 As indicated by arrow A2, when exhaust flows from the front end to the rear end of the exhaust unit 300, the groove G2 can be formed on the front surface of the protrusion 310. That is, the groove G2 of the protrusion 310 can be formed on the surface facing the exhaust, i.e., the side facing the exhaust port H1.

[0105] According to the configuration disclosed herein, the flow of exhaust gas can be disturbed, or the flow direction can be changed by the groove G2 formed in the protrusion 310. Furthermore, according to this configuration, particles such as sparks and electrode emissions can be collected in the groove G2 formed in the protrusion 310. Therefore, according to this embodiment, the effect of preventing sparks or emissions from leaking to the outside of the exhaust passage V can be further improved.

[0106] also, Figure 10 This is a schematic front view showing a partial structure of an exhaust unit 300 with a protrusion 310 according to another embodiment of the present disclosure. Furthermore, Figure 11 It is a section taken from the top along line B1-B1'. Figure 10 This is a cross-sectional view of the exhaust unit 300 connected to the module housing 200. This embodiment will also be described in detail based on features that differ from the previously described embodiment.

[0107] Reference Figure 10 and Figure 11 A groove can be formed on the inner end surface of the protrusion 310, that is, the end surface of the protrusion 310 facing the module housing 200, as indicated by G3. Furthermore, the groove G3 can form a certain space between the end of the protrusion 310 and the outer surface of the module housing 200. Specifically, the opening of the groove G3 can be formed in the protrusion 310 on the side facing the exhaust. That is, in Figure 10 and Figure 11 In the construction, when the exhaust flows from the front end to the rear end as shown by arrow A3, the groove G3 of the protrusion 310 can be formed to extend a predetermined length from the front end to the rear end in the inner end surface of the protrusion 310 directly facing the exhaust. However, as Figure 10 and Figure 11 As shown, the groove G3 of the protrusion 310 does not extend to the rear end of the protrusion 310 and can be configured to stop at a predetermined portion. That is, the groove G3 formed at the end of the protrusion 310 can be recessed to a predetermined point instead of penetrating the protrusion 310. Furthermore, the groove G3 of the protrusion 310 can be configured such that the rear end bends in a direction orthogonal to the flow direction of the exhaust gas, i.e., in the upward direction (+Z-axis direction) or the downward direction (-Z-axis direction).

[0108] According to the configuration disclosed herein, the groove G3 formed on the inner end surface of the protrusion 310 can collect sparks or exhaust gases that move with the exhaust, thereby more effectively preventing sparks or exhaust gases from being discharged to the outside of the exhaust passage V. In particular, according to this configuration, the effect of collecting sparks or exhaust gases introduced into the gap between the inner end surface of the protrusion 310 and the module housing 200 in the groove G3 can be improved.

[0109] In addition, such as Figure 9 As shown, the exhaust unit 300 may also include a porous member 320. The porous member 320 may be configured to have a plurality of pores therein. Specifically, the internal pores may be configured to communicate with the outside. That is, the pores held in the porous member 320 can be considered as empty spaces filled only with gas, and the pores may not be sealed but rather configured to communicate with the outside. For example, the porous member 320 may be configured such that multiple wires, particularly those made of materials such as metal or polymer, are intertwined with each other. Specifically, the porous member 320 may be configured to be inserted into the groove G2 of the protrusion 310.

[0110] According to the configuration of this disclosure, sparks or emissions that come into contact with the surface of the protrusion 310 or are introduced into the groove G2 of the protrusion 310 are captured by the porous member 320, thereby enabling more reliable prevention of sparks or emissions from being discharged to the outside of the exhaust passage V.

[0111] Additionally, although not shown in the accompanying drawings, a protrusion may be formed on the surface of the protrusion 310. Specifically, the protrusion may be formed in a way that obstructs the flow direction of exhaust gas flowing along the surface of the protrusion 310. For example, the protrusion may be configured to generate disturbances or eddies in the flow of exhaust gas flowing along the surface of the protrusion 310. In this case, it can further prevent sparks or emissions from being emitted to the outside.

[0112] Figure 12 This is a schematic top cross-sectional view illustrating a partial structure of the exhaust unit 300 connected to the module housing 200 according to yet another embodiment of this disclosure. This embodiment will also be described in detail based on features that differ from the foregoing embodiments.

[0113] refer to Figure 12 The exhaust unit 300 may also include an adhesive member 330. The adhesive member 330 is made of an adhesive material and can be positioned on the inner surface of the exhaust passage V. Here, the adhesive member 330 may be made of adhesive material only, or it may be configured as an adhesive strip with adhesive material on the surface of the substrate.

[0114] Specifically, the adhesive member 330 can be configured to be positioned on the exhaust-facing side surface of the protrusion 310. For example, when the exhaust flows from the front end to the rear end as indicated by arrow A4, the adhesive member 330 can be attached to the surface at the front end of the protrusion 310 to face the exhaust. In this case, the surface orientation of the adhesive member 330 can be orthogonal to the flow direction of the exhaust. Here, the adhesiveness of the adhesive member 330 can be continuously exhibited under normal conditions, or it can be exhibited only under high-temperature conditions such as exhaust flow.

[0115] According to this embodiment of the present disclosure, the adhesiveness of the adhesive member 330 allows for better capture of particles, such as sparks or emissions, contained in the exhaust gas. Therefore, in this case, the effect of preventing sparks or emissions from being emitted to the outside of the exhaust passage V can be further improved.

[0116] Meanwhile, the construction of the adhesive member 330 formed on the surface of the protrusion 310 facing the vent (e.g., the surface at the front end of the protrusion 310) has been described. Figure 12 The implementation method is as follows. However, the adhesive member 330 may also be formed on another surface of the protrusion 310, such as the upper and / or lower surface of the protrusion 310.

[0117] Figure 13 This is a schematic top cross-sectional view illustrating a partial structure of the exhaust unit 300 connected to the module housing 200 according to yet another embodiment of this disclosure. This embodiment will also be described in detail based on features that differ from the foregoing embodiments.

[0118] refer to Figure 13 In the exhaust unit 300, the protrusion 310 can be configured to have a width that gradually increases towards the inward end. That is, as... Figure 13 As shown, when the width of the outer end of the protrusion 310 is W3 and the width of the inner end of the protrusion 310 is W4, W4 can be greater than W3. That is, the protrusion 310 can be configured to increase in width from the outer side to the inner side.

[0119] According to this embodiment of the present disclosure, deformation of the protrusion 310 can be prevented even under high pressure of exhaust gas. Specifically, in this configuration, because the contact area between the inner end of the protrusion 310 and the module housing 200 is large, the end of the protrusion 310 can be stably supported by the surface of the module housing 200 and can remain undeformed even when exhaust gas is flowing. For example, as shown by arrow A5, the protrusion 310 can receive force in the A5 direction when exhaust gas is flowing. However, because the inner end of the protrusion 310 contacts the outer surface of the module housing 200 on a large surface area, the protrusion 310 is less likely to bend along the A5 direction. Therefore, in this case, the exhaust control configuration of the exhaust unit 300 can be continuously maintained by the protrusion 310.

[0120] Figure 14 This is a schematic top cross-sectional view illustrating a partial structure of the exhaust unit 300 connected to the module housing 200 according to yet another embodiment of this disclosure. This embodiment will also be described in detail based on features that differ from the foregoing embodiments.

[0121] refer to Figure 14The protrusion 310 of the exhaust unit 300 can be configured as substantially plate-shaped, unlike the various embodiments described above. In this case, at least one of the two wide surfaces of the plate-shaped protrusion 310 can be configured to face the flow direction of the exhaust gas. For example, as Figure 14 As indicated by arrow A6, when the exhaust flows in the direction from the front to the rear of the battery module, one surface of the protrusion 310 can be configured to face forward, and the other surface of the protrusion 310 can be configured to face backward.

[0122] In addition, such as Figure 14 As indicated by F, the end of the protrusion 310 on the side facing the outer surface of the module housing 200 can be configured to extend in the direction of the exhaust flow, i.e., in the direction toward the exhaust port H1.

[0123] According to the configuration disclosed herein, when exhaust gas flows inside the exhaust unit 300 with the exhaust unit 300 connected to the module housing 200, the protrusion 310 can remain unpulled even under high exhaust pressure and can stably contact the surface of the module housing 200. Furthermore, in this embodiment, by increasing the contact area between the protrusion 310 and the module housing 200, the bonding and heat transfer between the protrusion 310 and the module housing 200 can be further improved. In particular, in this case, by inserting an adhesive between the protrusion 310 and the module housing 200, it is easier to achieve a configuration that further increases the bonding force between the protrusion 310 and the module housing 200.

[0124] Figure 15 and Figure 16 This is a perspective view schematically illustrating the construction of an exhaust unit 300 according to various other embodiments of the present disclosure. This embodiment will also be described in detail based on features that differ from the foregoing embodiments.

[0125] First, refer to Figure 15 Each of the plurality of protrusions 310 can be formed as a plate. That is, in the foregoing embodiments, the construction of the protrusions 310 having a three-dimensional shape such as a rectangle when viewed from the module housing 200 for the exhaust unit 300 has been mainly described, but the protrusions 310 can also be constructed to have a straight shape. In particular, the protrusions 310 can be configured such that some edges are fixed to the plate portion 301 and the edge portion 302, and other edges are not fixed in the exhaust unit 300. When the exhaust unit 300 is coupled to the module housing 200, at least some of the other edges of the protrusions 310 that are not fixed in the exhaust unit 300 can be configured to contact the surface of the module housing 200. Furthermore, the plate-shaped protrusions 310 can be configured to be inclined at a predetermined angle to the direction of the edge portion 302, such as Figure 15As shown. According to the structure disclosed herein, the structure is relatively simple and can ensure the effect of preventing sparks or emissions from being emitted.

[0126] In addition, refer to Figure 16 The protrusion 310 can be configured as a plate, and a predetermined portion thereof can be configured as a curved shape. That is, when viewed from the module housing 200 through the open inlet of the exhaust unit 300, the protrusion 310 can be configured as having a bent straight line shape. Furthermore, multiple bent linear protrusions 310 can be arranged such that they are spaced apart by a predetermined distance along the exhaust flow direction (e.g., in the front-rear direction (X-axis direction) of the module housing 200). Additionally, the multiple bent linear protrusions 310 can be arranged to be spaced apart by a predetermined distance along a direction orthogonal to the exhaust flow direction (e.g., in the vertical direction (Z-axis direction) of the module housing 200). According to this configuration of the present disclosure, the bent shape of the protrusion 310 further enhances the effect of collecting sparks or emissions contained in the exhaust.

[0127] Figure 17 This is a perspective view schematically illustrating the construction of a battery module according to another embodiment of the present disclosure. This embodiment will also be described in detail based on features that differ from the foregoing embodiments.

[0128] refer to Figure 17 The exhaust unit 300 can be attached to the upper part of the module housing 200. In this case, the protrusion 310 can be provided on the inner surface of the exhaust unit 300. Specifically, when the exhaust port H1 is located on the upper surface of the module housing 200, the exhaust unit 300 can be attached to the upper part of the module housing 200 to correspond to the position of the exhaust port H1. Furthermore, when the exhaust ports H1 are formed on the left and right sides of the upper surface of the module housing 200 respectively, the exhaust unit 300 can be attached to the left and right sides of the upper part of the module housing 200 respectively, as shown below. Figure 17 As shown. At this time, when exhaust is discharged from exhaust port H1, the exhaust can be as follows: Figure 17 The arrows in the diagram indicate that the emissions are being carried out.

[0129] Figure 18 This is a perspective view schematically illustrating the construction of a battery module according to yet another embodiment of this disclosure. This embodiment will also be described in detail based on features that differ from the foregoing embodiments.

[0130] refer to Figure 18Two exhaust units 300 are respectively connected to the left and right sides of the upper surface of the module housing 200, and the exhaust directions of the exhaust units 300 can be opposite to each other. That is, the exhaust direction of the exhaust unit 300 located on the left side of the upper surface of the module housing 200 can be configured to face rearward, and the exhaust direction of the exhaust unit 300 located on the right side of the upper surface of the module housing 200 can be configured to face forward.

[0131] According to this embodiment of the present disclosure, since the exhaust directions of the multiple exhaust units 300 are different, the exhaust can be dispersed, preventing the exhaust from concentrating on a specific part. Therefore, in this case, overheating of a specific part due to concentrated exhaust can be prevented.

[0132] Figure 19 This is a schematic diagram showing a battery pack according to an embodiment of the present disclosure, viewed from above. Features that are the same as or similar to those in the foregoing embodiments will not be described in detail with respect to this embodiment.

[0133] refer to Figure 19 The battery pack according to this disclosure may include one or more battery modules M according to this disclosure. In particular, to increase capacity and / or output, the battery pack according to this disclosure may include multiple battery modules M according to this disclosure. In this case, the various configurations described above can be applied to each battery module M. For example, each battery module M includes a unit assembly 100, a module housing 200, and an exhaust unit 300. Furthermore, multiple battery modules M may be housed inside the battery pack housing PH.

[0134] In the case of the battery pack according to this disclosure, even if a thermal event occurs in a particular battery module, safety can be ensured to a certain level or above. Specifically, the battery module M included in the battery pack according to this disclosure may include an exhaust unit 300, and exhaust gas may be discharged through the exhaust unit 300 as indicated by the arrow. Therefore, by preventing, as far as possible, ignition factors such as sparks, electrode emissions, and carbides from being included in the exhaust gas discharged to the outside, ignition in other battery modules M and in the vicinity of the corresponding battery module M can be prevented.

[0135] Furthermore, in the case of the battery pack according to this disclosure, the exhaust direction can be controlled by the exhaust unit 300 included in each battery module, so that the exhaust is not directly sprayed toward other battery modules. For example, as Figure 19As shown, when multiple battery modules M are arranged in two rows, namely the left row and the right row, in the battery pack housing, the exhaust unit 300 sprays air to the left for battery modules M in the left row, and the exhaust unit 300 sprays air to the right for battery modules M in the right row. In this case, when exhaust is emitted from a specific battery module (e.g., M4), the exhaust is directed towards other battery modules, and thus thermal events can be more effectively prevented from spreading to other battery modules through the exhaust.

[0136] In addition, although not shown in the figures, the battery pack according to this disclosure may include various other components besides the battery module M or the battery pack housing PH, such as battery pack components, such as BMS, busbars, relays and current sensors known in the art at the time of filing this application.

[0137] Furthermore, in the various embodiments described above, the venting unit 300 used in the battery module can also be used in the battery pack. This will be referred to... Figure 20 Further description.

[0138] Figure 20 This is a diagram showing a battery pack according to another embodiment of the present disclosure, viewed from above. For example, Figure 20 The internal structure of the battery pack according to this disclosure can be viewed as being shown with the upper part of the battery pack housing PH removed. This embodiment will also be described in detail based on features that differ from the foregoing embodiments.

[0139] refer to Figure 20 An opening may be formed in at least one side of the battery pack housing PH that houses multiple battery modules M, as indicated by H3. The battery pack opening H3 may be formed to communicate between the internal space of the battery pack housing PH and the external space. In particular, the battery pack opening H3 may serve as a channel through which gases or the like present in the internal space of the battery pack housing PH are discharged to the outside.

[0140] In this configuration, the battery pack housing PH may be equipped with an exhaust unit 300 as described above according to this disclosure. Specifically, as Figure 20 As shown, when the battery pack hole H3 is formed in the battery pack housing PH, the venting unit 300 can be attached to the part where the battery pack hole H3 is formed at the outside of the battery pack housing PH.

[0141] In other words, the battery pack according to this embodiment of the present disclosure may include at least one battery module M, a battery pack housing PH configured to accommodate at least one battery module M in its internal space and to form a battery pack hole H3 therein, and an exhaust unit 300 mounted to the battery pack housing PH and having an exhaust passage V such that exhaust gas discharged from the battery pack hole H3 can be introduced into the exhaust unit 300 and discharged to the outside, the exhaust unit 300 having a protrusion 310 configured to protrude from the inside of the exhaust passage V toward the outer surface of the battery pack housing PH.

[0142] In this case, the exhaust gas generated from any battery module M can be as follows: Figure 20 The arrow indicates that the substance flows through the battery pack hole H3 and into the venting unit 300 located outside the battery pack housing PH. Then, as described above, the venting unit 300 can prevent sparks, electrode emissions, carbides, etc., from being emitted to the outside.

[0143] In this embodiment, in the configuration where the exhaust unit 300 is mounted to the battery pack housing PH, several embodiments of the exhaust unit 300 described above as being mounted to the module housing 200 can be applied to the exhaust unit 300 in the same or similar way.

[0144] At the same time, such as Figure 20 As shown, the exhaust unit 300 may not be included in each battery module M. However, the exhaust unit 300 may also be attached separately to each battery module M, as shown in the diagram. Figure 19 As shown.

[0145] In addition, Figure 20 In one embodiment, the unit component 100 is housed within the module housing 200 and arranged in a modular form inside the battery pack housing PH. However, in another embodiment of the battery pack according to this disclosure, the unit component 100 may not be housed within the module housing 200, but may be directly mounted to the battery pack housing PH in a unit-to-group form. In this case, the aforementioned battery module M may include only the unit component 100 without the module housing 200. Meanwhile, within the internal space of the battery pack housing PH, control devices such as a BMS (Battery Management System) and electrical components such as relays and current sensors can be accommodated together.

[0146] The battery module or battery pack according to this disclosure can be applied to vehicles such as electric vehicles or hybrid electric vehicles. That is, a vehicle according to this disclosure may include the battery module or battery pack according to this disclosure. Furthermore, in addition to the battery module or battery pack, a vehicle according to this disclosure may also include various other components incorporated in the vehicle. For example, in addition to the battery module according to this disclosure, a vehicle according to this disclosure may also include a body, a motor, control devices such as an electronic control unit (ECU), etc.

[0147] Furthermore, this specification uses terms indicating directions such as “up,” “down,” “left,” “right,” “front,” and “back,” but these terms are merely for ease of description and may vary depending on the position of the object or the observer, as will be apparent to those skilled in the art.

[0148] This disclosure has been described in detail. However, it should be understood that the detailed description and specific examples are given only by way of illustration, while indicating preferred embodiments of this disclosure, as various changes and modifications within the scope of this disclosure will become apparent to those skilled in the art from the detailed description.

[0149] [Figure Labels]

[0150] 100: Unit Component

[0151] 200: Module casing

[0152] 300: Exhaust unit

[0153] 301: Plate portion; 302: Edge portion

[0154] 310: Protrusion

[0155] 320: Porous components

[0156] 330: Adhesive components

[0157] V: Exhaust passage

[0158] Vi: Inlet port, Vo: Outlet port

[0159] H1: Exhaust port

[0160] H2: Inlet hole

[0161] M: Battery module

[0162] PH: Battery pack casing

[0163] H3: Battery pack hole

Claims

1. A battery module, the battery module comprising: A unit assembly having at least one battery cell; A module housing, the module housing being configured to house the unit assembly within an internal space of the module housing and having vent holes formed in the module housing to discharge exhaust gas generated from the unit assembly; as well as An exhaust unit is disposed on the outside of the module housing and has an exhaust channel, such that exhaust gas emitted from the exhaust port is introduced into the exhaust unit and discharged to the outside. The exhaust unit has a protrusion configured to project from the interior of the exhaust channel toward the outer surface of the module housing. The exhaust unit has an empty space formed inside the protrusion.

2. The battery module according to claim 1, in, Multiple protrusions are arranged along the flow direction of the exhaust gas.

3. The battery module according to claim 1, in, The exhaust unit further includes: a plate portion formed in a plate shape such that the protrusion is located on the inner surface of the plate portion; and an edge portion that protrudes from the edge of the plate portion toward the outer surface of the module housing and is connected to the outer surface of the module housing.

4. The battery module according to claim 1, in, The protrusion is configured such that its width in the same direction as the flow direction of the exhaust gas is greater than or equal to its width in the direction orthogonal to the flow direction of the exhaust gas.

5. The battery module according to claim 1, in, The exhaust unit is configured such that the outer surface of the portion forming the protrusion is recessed toward the outer surface of the module housing.

6. The battery module according to claim 1, in, The exhaust unit has a protrusion or groove formed on the surface of the protrusion.

7. The battery module according to claim 1, in, The exhaust unit also includes an adhesive member having a material with adhesive properties and positioned on the inner surface of the exhaust passage.

8. The battery module according to claim 1, in, The protrusion is configured to have a width that gradually increases toward the inner end.

9. The battery module according to claim 7, in, The adhesive member is configured to be positioned on the side surface of the protrusion facing the exhaust gas.

10. The battery module according to claim 6, in, The opening of the groove is formed in the protrusion on the side facing the exhaust.

11. The battery module according to claim 10, in, The groove of the protrusion does not extend to the rear end of the protrusion.

12. A battery pack comprising a battery module according to any one of claims 1 to 11.

13. A battery pack, the battery pack comprising: At least one battery module; A battery pack housing, the battery pack housing being configured to accommodate the at least one battery module in an internal space of the battery pack housing and having a battery pack hole formed in the battery pack housing; as well as An exhaust unit, mounted to the battery pack housing and having an exhaust channel, allows exhaust gas emitted from the battery pack openings to be introduced into the exhaust unit and discharged to the outside. The exhaust unit has a protrusion configured to project from the interior of the exhaust channel toward the outer surface of the battery pack housing. The exhaust unit has an empty space formed inside the protrusion.

14. A vehicle comprising a battery module according to any one of claims 1 to 11.

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