Battery module, battery pack, and vehicle including same

Abstract

The present invention relates to a battery module, the battery module comprising: a cell stack comprising a plurality of battery cells stacked and arranged in one direction; the module shell is configured to be used for accommodating the battery cell stacking piece; a discharge hole provided on the module case, and configured to discharge a gas generated from the battery cell to the outside of the module case; and canisters, each of which is at least partially attached to the module housing such that carbon dioxide stored therein is directed toward the discharge hole and discharged through the discharge hole.

Description

Technical Field

[0001] The present disclosure relates to a battery module, a battery pack, and a vehicle including the same, and more particularly, to a battery module and a battery pack capable of suppressing generation of flame by detecting gas generated from battery cells, and a vehicle including the same.

[0002] This application claims priority to Korean Patent Application No. 10-2023-0074501 filed in Korea on June 9, 2023, the disclosure of which is incorporated herein by reference. Background Art

[0003] Secondary batteries that are easily applied according to product groups and have electrical characteristics such as high energy density are generally used in electric vehicles (EV) or hybrid electric vehicles (HEV) driven by an electric drive source and portable devices. These secondary batteries are gaining attention as new energy sources for improving eco-friendliness and energy efficiency because they have the main advantage of significantly reducing the use of fossil fuels and another advantage of not generating byproducts due to energy use.

[0004] Currently widely used secondary batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, etc. If a higher output voltage is required, a battery module or battery pack can be configured by connecting a plurality of battery cells in series. In addition, a battery module or battery pack can be configured by connecting a plurality of battery cells in parallel so as to increase the charge / discharge capacity. Therefore, the number of battery cells included in the battery module or battery pack can be set in various ways according to the required output voltage or charge / discharge capacity.

[0005] In addition, a common method for configuring a battery pack by connecting a plurality of battery modules in series / parallel is to preferentially configure a battery module including at least one battery cell, and then add other elements using the at least one battery module, thereby configuring a battery pack or a battery rack. Alternatively, a battery pack may be configured by connecting a plurality of battery cells in series / parallel.

[0006] In the case of a conventional battery pack, due to abnormality or misuse of the battery cell, the internal temperature may rise, which may cause the internal pressure of the battery cell to increase. Due to this internal pressure, high-temperature gas may be discharged from the battery cell. In this case, the high-temperature exhaust gas may continue to accumulate heat inside the battery module or battery pack, causing rapid heat propagation between the battery cells.

[0007] As a result, the battery cells catch fire simultaneously, making it difficult to contain the thermal event, so that the battery module or battery pack may explode, causing further damage.

[0008] In addition, generally, when gas is ejected from a battery cell, a plurality of electrode plates or active materials inside the battery cell may be heated to a high temperature and discharged to the outside, and these high-temperature particles may appear in the form of sparks. In this case, if the sparks react with oxygen when discharged, the oxygen may ignite to form a flame or develop into a fire.

[0009] In addition, in such a conventional battery module or battery pack, a plurality of discharge holes are provided on one side of the module housing or the battery pack housing to prevent internal heat accumulation. For example, high-temperature gas discharged from a triggering battery cell where an event occurs is discharged in a specific direction through a specific discharge hole at a position corresponding to the triggering battery cell among the plurality of discharge holes, thereby preventing heat accumulation inside the battery module or battery pack.

[0010] Furthermore, when a thermal event occurs in a specific battery cell, the battery module or battery pack is required to prevent high-temperature gas or sparks from reacting with oxygen to form a flame by removing at least one of flame-causing elements such as fuel, oxygen, and heat. Summary of the invention

[0011] Technical issues

[0012] The present disclosure is designed to solve the problems of the related art, and thus the present disclosure is directed to providing a battery module capable of ensuring safety and reliability by suppressing occurrence of flame inside a module case in the event of an abnormality in a battery cell.

[0013] The present disclosure also relates to providing a battery module capable of ensuring safety and reliability by suppressing occurrence of flame inside a battery pack case in the event of an abnormality in a battery cell.

[0014] The present disclosure also relates to providing a vehicle having improved safety by including the above-mentioned battery module or battery pack.

[0015] However, the technical problems that the present disclosure seeks 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.

[0016] Technical Solution

[0017] According to one aspect of the present disclosure, a battery module is provided, comprising: a cell stack comprising a plurality of battery cells arranged to be stacked in one direction; a module housing configured to accommodate the cell stack; a discharge hole formed on the module housing and configured to discharge gas generated from the battery cells to the outside of the module housing; and a cartridge having at least a portion connected to the module housing and configured to release carbon dioxide stored in the cartridge toward the discharge hole.

[0018] The discharge hole may be provided on one side of the module case, and the tank may be provided on the other side of the module case to face the discharge hole.

[0019] The module housing may include: a module bottom plate configured to support the plurality of battery cells at the bottom of the cell stack and having the drain holes formed thereon, and a module top plate coupled to the module bottom plate and to which at least a portion of the can is coupled.

[0020] The discharge hole and the tank may be arranged in a straight line in a vertical direction.

[0021] The cell stack may include a plurality of blocking members arranged in one direction between at least one of the plurality of battery cells, and a plurality of discharge holes provided between adjacent blocking members among the plurality of blocking members.

[0022] A plurality of tanks may be disposed to face the plurality of discharge holes, respectively.

[0023] The plurality of discharge holes and the plurality of cans may be provided on at least one side of the cell stack.

[0024] The battery module of the present disclosure may further include a bus bar frame assembly disposed inside the module housing and configured to cover at least one side of the battery cell stack, and the plurality of drain holes and the plurality of cans may be disposed inwardly from the bus bar frame assembly.

[0025] The battery module may further include a gas sensor disposed inside the module housing and configured to detect gas generated from the battery cells, and if the gas sensor detects the generation of the gas, carbon dioxide stored inside the tank may be released toward the discharge hole.

[0026] The tank may include a cylinder unit including a storage portion having a space for storing carbon dioxide therein and a release portion extending from the storage portion and configured to release the carbon dioxide.

[0027] The diameter of the release portion may be smaller than the diameter of the storage portion.

[0028] The tank may further include an operation unit connected to the cylinder unit and configured to cause the cylinder unit to release carbon dioxide when the gas sensor detects generation of the gas.

[0029] The operating unit may be configured to be electrically connected to the gas sensor.

[0030] In addition, according to an embodiment of the present disclosure, there is provided a battery pack including the battery module according to the present disclosure.

[0031] In addition, the present disclosure provides a vehicle including the battery pack according to the embodiment of the present disclosure.

[0032] According to another aspect of the present disclosure, a battery pack is provided, comprising: a cell stack comprising a plurality of battery cells arranged to be stacked in one direction; a battery pack case configured to accommodate the cell stack; an exhaust device disposed in the battery pack case and configured to exhaust gases generated from the battery cells to the outside of the battery pack case; and a tank having at least a portion connected to the battery pack case and configured to release carbon dioxide stored therein toward the exhaust device.

[0033] The battery pack housing may include: a battery pack bottom frame, which is configured to support the bottom of the battery cell stack and has the discharge device, and a battery pack top frame, which is connected to the battery pack bottom frame and at least a portion of the can is connected to the battery pack top frame.

[0034] The discharge device and the tank may be disposed to face each other in a vertical direction.

[0035] The cell stack may include a plurality of barrier members arranged in one direction between at least one of the plurality of battery cells, and a plurality of discharge devices may be provided between adjacent barrier members among the plurality of barrier members.

[0036] A plurality of tanks may be disposed to face the plurality of discharge devices, respectively.

[0037] The plurality of discharge devices and the plurality of cans may be disposed on at least one side of the cell stack.

[0038] The battery pack of the present disclosure may further include a gas sensor disposed inside the battery pack housing and configured to detect gas generated from the battery cells, and if the gas sensor detects the generation of the gas, the carbon dioxide stored inside the tank may be released toward the exhaust device.

[0039] A plurality of cell stacks may be provided, and the pack case may further include a partition provided to partition the plurality of cell stacks inside the pack bottom frame.

[0040] In addition, the present disclosure also provides a vehicle including the battery pack according to another embodiment of the present disclosure.

[0041] Beneficial Effects

[0042] According to an aspect of the present disclosure, in the event of an abnormality in a battery cell, a flame inside a module housing or a battery pack housing may be suppressed by removing elements that may cause a flame, thereby ensuring the safety and reliability of a battery module or a battery pack.

[0043] In addition, according to an aspect of the present disclosure, in the event of an abnormality in a battery cell, sparks discharged from the battery cell may be prevented from igniting oxygen, thereby suppressing flames.

[0044] In addition, according to one aspect of the present disclosure, in the event of an abnormality in a battery cell, the exhaust gas can be quickly discharged to the outside of the module housing or the battery pack housing, thereby suppressing the flame and preventing thermal damage to other battery cells to the greatest extent, thereby effectively ensuring the heat propagation prevention performance in the battery pack.

[0045] In addition, the present disclosure may have various other effects, and these will be described in the corresponding embodiments, or descriptions of effects that can be easily inferred by those skilled in the art will be omitted. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the detailed description of the present invention, are used to provide a further understanding of the technical idea of ​​the present disclosure, and therefore, the present disclosure shall not be construed as being limited to the accompanying drawings.

[0047] Figure 1 is a perspective view of a battery module according to an embodiment of the present disclosure.

[0048] Figure 2 is an exploded perspective view of a battery module according to an embodiment of the present disclosure.

[0049] Figure 3 is a bottom view of a battery module according to an embodiment of the present disclosure.

[0050] Figure 4 is a cross-sectional view of a battery module on an XZ plane according to an embodiment of the present disclosure.

[0051] Figure 5 is a diagram illustrating an operating direction of a can in a battery module according to an embodiment of the present disclosure.

[0052] Figure 6 is a cross-sectional view of a battery module on an XY plane according to an embodiment of the present disclosure.

[0053] Figure 7 is an exploded perspective view of a cell stack and a bus bar frame assembly of a battery module according to an embodiment of the present disclosure.

[0054] Figure 8 is a cross-sectional view of a battery module on a YZ plane according to an embodiment of the present disclosure.

[0055] Fig. 9 is a diagram illustrating a gas sensor that may be included in a battery module according to an embodiment of the present disclosure.

[0056] Fig.10 is a diagram illustrating a detailed structure of a can that may be included in a battery module according to an embodiment of the present disclosure.

[0057] Fig.11 is a diagram illustrating a position of an operating unit of a can that may be included in a battery module according to an embodiment of the present disclosure.

[0058] Fig.12 is a perspective view of a battery pack including a battery module according to an embodiment of the present disclosure.

[0059] Fig.13 is a perspective view of a battery pack according to another embodiment of the present disclosure.

[0060] Fig.14 is an exploded perspective view of a battery pack according to another embodiment of the present disclosure.

[0061] Fig.15 is a bottom view of a battery pack according to another embodiment of the present disclosure.

[0062] Fig.16 is a diagram illustrating an operating direction of a can in a battery pack according to another embodiment of the present disclosure.

[0063] Fig.17 is a perspective view of a vehicle including a battery pack according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0064] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before the description is made, it should be understood that the terms used in the specification and the appended claims should not be interpreted as limited to the general meaning and dictionary meaning, but are interpreted based on the meaning and concept corresponding to the technical aspects of the present disclosure on the basis of the principle that allows the inventor to define the terms suitable for the best description.

[0065] Therefore, the configurations proposed in the embodiments of this specification and the drawings only indicate the most preferred embodiments of the present disclosure and do not represent all technical ideas of the present disclosure. Therefore, it should be understood that various equivalents and modifications may be made thereto when the present application is submitted.

[0066] The sizes of the corresponding elements or specific parts of each element shown in the drawings are exaggerated, omitted or simplified to facilitate the description and explanation thereof. Therefore, the sizes of the corresponding elements do not fully reflect their actual sizes. The description of related known functions or configurations that may obscure the subject matter of the present disclosure will be omitted. For reference, in this specification, the terms indicating directions are based on the elements shown in the drawings and are relative terms that may vary according to the posture or position of the actual elements.

[0067] 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 description and may vary depending on the position of the target object or the position of the observer.

[0068] For example, in an embodiment of the present disclosure, the X-axis direction shown in the figure may indicate a forward / backward direction, the Y-axis direction may indicate a left / right direction perpendicular to the X-axis direction on a flat plane (XY plane), and the Z-axis direction may indicate an upward / downward direction (vertical direction) perpendicular to both the X-axis direction and the Y-axis direction.

[0069] Figure 1 is a perspective view of a battery module according to an embodiment of the present disclosure, Figure 2 is an exploded perspective view of a battery module according to an embodiment of the present disclosure, and Figure 3 is a bottom view of a battery module according to an embodiment of the present disclosure.

[0070] Reference Figures 1 to 3 , a battery module 10 according to an embodiment of the present disclosure includes a cell stack 100 , a module case 200 , a discharge hole H, and a can 300 .

[0071] The cell stack 100 may include a battery cell 110. A plurality of battery cells 110 may be provided. Figure 2 As shown in , etc., a plurality of battery cells 110 may be arranged side by side in the left / right direction (X-axis direction) while standing upright in the vertical direction (Z-axis direction). In this case, the sealing portion of each battery cell 110 may be guided in the forward / rearward direction (Y-axis direction) and the upward / downward direction (Z-axis direction), and the storage portion may be guided in the left / right direction (X-axis direction).

[0072] The present disclosure is not limited to a specific type or form of battery cells 110, and various battery cells 110 known at the time of filing the present disclosure may be applied to configure the cell stack 100 of the present disclosure. Although the present embodiment will be described based on a pouch-type secondary battery having high energy density and easy to stack as shown in the figure, a cylindrical or prismatic secondary battery may be applied to the battery cell 110.

[0073] The cell stack 100 may further include a blocking member 120. The blocking member 120 may be disposed between the battery cells 110. Specifically, a plurality of blocking members 120 may be included in one cell stack 100. Figure 6 The blocking member 120 will be described in more detail.

[0074] The battery module 10 of the present disclosure may further include a bus bar frame assembly 500. The bus bar frame assembly 500 may be disposed inside the module housing 200 and configured to cover at least one side of the battery cell stack 100. Figure 6 and Figure 7 The bus bar frame assembly 500 is described in further detail.

[0075] In addition, refer to Figure 1 and Figure 2 , the module case 200 may be configured to have an inner space for accommodating the cell stack 100 .

[0076] In addition, the module housing 200 may be configured so that the cell stack 100 can be inserted into the module housing 200 along one direction. For example, the cell stack 100 may be inserted into the module housing 200 in the longitudinal direction (Y-axis direction). That is, the module housing 200 may be configured to insert the cell stack 100 into the module housing 200 using a sliding or press-fitting manner. For press-fitting, there may be almost no gap between the upper and lower surfaces of the module housing 200 and the upper and lower ends of the cell stack 100, and there may also be almost no gap between the two side surfaces of the module housing 200 and the two side portions of the cell stack 100.

[0077] The module case 200 may be made of a metal material having rigidity and heat resistance so as to physically or chemically protect the battery cells 110 stored therein.

[0078] In addition, the battery module 10 according to an embodiment of the present disclosure may include a discharge hole H. The discharge hole H may be configured to discharge the gas generated from the battery cell 110 to the outside of the module housing 200. The discharge hole H may be formed on the module housing 200 so as to enable directional discharge in one direction. Figure 3 As shown in FIG. 1 , a plurality of discharge holes H may be formed on the lower surface of the module case 200 , thereby enabling directional discharge through the discharge holes H toward the bottom of the battery module 10 .

[0079] Specifically, refer to Figure 3 , the discharge holes H may be provided at regular intervals in the left / right direction (X-axis direction) at positions close to both ends thereof in the longitudinal direction (Y-axis direction) on the lower surface of the module housing 200. According to the configuration of the present disclosure implemented above, if thermal runaway occurs in one battery cell 110 so that gas or the like is generated, directional discharge in which the gas or the like is discharged in a downward direction from both sides of the module housing 200 may be performed.

[0080] The battery module 10 according to an embodiment of the present disclosure may further include a tank 300. The tank 300 may be configured to store carbon dioxide therein. Carbon dioxide may be stored in the tank 300 in a liquid state under high pressure. For example, the tank 300 may be a commercially available product for inflating a bicycle tire by injecting carbon dioxide. The tank 300 may be used with an inflator or an adapter.

[0081] At least a portion of the tank 300 may be coupled to the module housing 200. Later, the position of the tank 300 will be described in more detail. The tank 300 may be configured to release the carbon dioxide stored therein toward the discharge hole H. That is, the tank 300 may be configured such that gas is purged by the carbon dioxide stored therein and discharged through the discharge hole H.

[0082] According to the configuration of the present disclosure implemented above, when a thermal event occurs in a specific battery cell 110, high temperature gas or the like can be discharged more quickly through the discharge hole H by carbon dioxide released from the can 300. As a result, the internal pressure inside the battery module 10 can be reduced, thereby reducing the risk of explosion.

[0083] In addition, according to the configuration of the present disclosure implemented as above, it is possible to suppress the generation of flame inside the module housing 200 by removing high-temperature gas, which is one of the elements that can cause flames, thereby ensuring the safety and reliability of the battery module 10. In addition, according to the configuration of the present disclosure implemented as above, it is possible to prevent thermal damage to other battery cells 110 to the greatest extent, thereby effectively ensuring the heat propagation prevention performance in the battery module 10.

[0084] In addition, when gas is ejected from the battery cell 110, a plurality of electrode plates or active materials inside the battery cell 110 may be heated to a high temperature and discharged to the outside, and these high-temperature particles may appear in the form of sparks. In this case, if the spark ignites oxygen when discharged to the outside of the battery module 10, this may cause flames to be generated or develop into a fire. However, the battery module 10 can prevent fire by including the can 300.

[0085] Specifically, the carbon dioxide stored inside the tank 300 is heavier than oxygen, so when it is released into the combustible material, it forms a non-combustible layer on the surface of the combustible material. Therefore, if the carbon dioxide is released from the tank 300, the supply of oxygen, which is one of the elements for generating flames, can be cut off.

[0086] According to the configuration of the present disclosure achieved above, carbon dioxide released from the tank 300 can remove oxygen inside the module case 200. As a result, it is possible to prevent sparks from reacting with oxygen inside the module case 200 and generating flames by removing oxygen, which is one of the elements causing flames.

[0087] Figure 4 is a cross-sectional view of a battery module on an XZ plane according to an embodiment of the present disclosure, and Figure 5 is a diagram illustrating an operating direction of a can in a battery module according to an embodiment of the present disclosure.

[0088] According to an embodiment of the present disclosure, the discharge hole H of the battery module 10 may be provided on one side of the module case 200, and the can 300 may be provided on the other side of the module case 200 to face the discharge hole H. Here, the other side of the module case 200 may be located opposite to the one side of the module case 200. For example, the discharge hole H and the can 300 may be provided on the upper and lower surfaces or both sides of the module case 200, respectively.

[0089] In addition, refer to Figure 2 and Figure 4 , the module housing 200 may include a module bottom plate 210 and a module top plate 220. The module bottom plate 210 may be configured to support a plurality of battery cells 110 at the bottom of the cell stack 100. The drain hole H may be formed on the module bottom plate 210. In addition, the module top plate 220 may be coupled to the module bottom plate 210. At least a portion of the tank 300 may be coupled to the module top plate 220.

[0090] Specifically, refer to Figure 2 The module case 200 of the battery module 10 according to this embodiment may be configured such that the module bottom plate 210 and the module top plate 220 cover an upper portion, a lower portion, and both sides of a space provided inside the module case 200 .

[0091] In addition, the module case 200 may include a pair of end plates 230 that cover the front and rear of the space, respectively. Therefore, the module case 200 may be configured in a generally rectangular parallelepiped shape.

[0092] In addition, although not shown for convenience, the end plate 230 may have an inner side made of an insulating material and an outer side made of a metal material. In addition, the end plate 230 may at least partially have a hole or a slit through which the positive and negative terminals or connectors of the battery module 10 are exposed to the outside.

[0093] In addition, the module housing 200 can be formed in various other forms. For example, the module housing 200 can be configured in a form in which the left plate, the right plate and the bottom plate are integrated with each other. In this case, the integrated housing portion can be referred to as a U-shaped frame. The top plate can be welded to the top of the U-shaped frame, thereby configuring a tubular shape. Alternatively, the module housing 200 can include a box-shaped lower housing in which the left plate, the right plate, the front plate and the rear plate are integrated with each other, and an upper cover that closes the top opening of the lower housing.

[0094] In the case of a module housing 200 including such a U-shaped frame, the battery cell stack 100 and the busbar frame assembly 500 can be assembled and arranged inside the U-shaped frame, and then the module top plate 220 can be connected to the top of the U-shaped frame, and then the end plate 230 can be connected thereto, thereby assembling the battery module 10.

[0095] Unlike this embodiment, the module housing 200 may be provided as a single frame. Although not shown, the single frame is configured in a substantially square tube shape. In the case where the module housing 200 includes such a single frame, the cell stack 100 and the busbar frame assembly 500 may be assembled and inserted into the single frame in a sliding manner, and then the end plate 230 may be coupled to the openings on both sides of the single frame, thereby assembling the battery module 10.

[0096] In addition, return to reference Figure 2 , a thermal resin 400 having adhesion may be further included between the module top plate 220 and the cell stack 100 and between the module bottom plate 210 and the cell stack 100. The thermal resin 400 may improve the fixation of the battery cell 110. In addition, it may increase the heat transfer rate between the battery cell 110 and the module housing 200, so that heat may be more efficiently discharged from the battery cell 110 to the outside during charging and discharging. In particular, since the application of the thermal resin 400 removes the empty space (air layer) between the module bottom plate 210 and the battery cell 110, the heat dissipation efficiency of the battery cell 110 may be maximized.

[0097] According to an embodiment of the present disclosure, the discharge hole H and the tank 300 may be arranged in a straight line in the vertical direction. Figure 4 and Figure 5 As shown in FIG. 3 , the tank 300 and the discharge hole H may be arranged in a straight line in the Z-axis direction.

[0098] According to the configuration of the present disclosure achieved above, the carbon dioxide stored inside the tank 300 can be directly released toward the discharge hole H (see Figure 5 The high temperature gas or oxygen discharged through the discharge hole H is removed (see Figure 5 As a result, it is possible to ensure safety and reliability by eliminating factors that cause flames in the event of an abnormality in the battery cell 110 and preventing flames from occurring inside the module case 200.

[0099] Figure 6 is a cross-sectional view of a battery module on an XY plane according to an embodiment of the present disclosure.

[0100] In addition, as described above, the plurality of battery cells 110 may be arranged to be stacked in one direction in the cell stack 100. For example, referring to Figure 2 In this embodiment, the battery cells 110 may be arranged to be stacked in a horizontal direction, for example, to be stacked in a left / right direction (X-axis direction) while standing upright in a vertical direction (Z-axis direction).

[0101] In the configuration of this implementation, refer to Figure 6 , the battery cell stack 100 may further include a blocking member 120. The blocking member 120 may be disposed between the battery cells 110. In particular, a plurality of blocking members 120 may be included in one battery cell stack 100. In this case, the plurality of blocking members 120 may be arranged to be spaced apart from each other by a predetermined distance in one direction (i.e., in the stacking direction (X-axis direction) of the battery cells 110). In addition, the plurality of blocking members 120 may be disposed at regular intervals between the battery cells 110 (e.g., at each battery cell or at every two or more battery cells 110). For example, when the battery cells 110 are configured as follows Figure 2 In the case of the pouch type battery cells shown in , the blocking member 120 may be in contact with at least some of the plurality of pouch type battery cells 110. In this embodiment, the plurality of blocking members 120 may be provided to be disposed at every two or more battery cells 110.

[0102] The barrier member 120 may be configured in the form of a pad having a compressive force, and may be made of a material having excellent heat resistance and / or fire resistance, for example, silicone, aerogel, mica, etc. Since the barrier member 120 is a pad having a compressive force, the barrier member 120 may contribute to the structural rigidity of the battery cell 110 by compressing the battery cell 110 when the battery cell 110 expands.

[0103] In addition, the blocking member 120 having heat resistance and / or fire resistance may perform a heat barrier function to prevent heat or flames generated from the battery cells 110 from spreading in the stacking direction of the battery cells 110 when a fire occurs inside the battery module 10. Therefore, heat propagation to adjacent battery cells 110 may be minimized. The blocking member 120 may block high-temperature gas, flames, and emissions generated from the battery cells 110, as well as heat. As a result, the blocking member 120 may prevent flames, etc. from being transferred between the battery cells 110 by partitioning or separating the battery cells 110.

[0104] Furthermore, in the implemented configuration, a plurality of discharge holes H may be provided. In particular, the discharge holes H may be provided between adjacent blocking members 120 among the plurality of blocking members 120 .

[0105] According to this configuration, the gas discharged from the battery cells 110 accommodated between the adjacent blocking members 120 can be discharged to the outside of the module housing 200 only through the discharge hole H located between the adjacent blocking members 120. That is, since the entire surrounding area of ​​the discharge hole H is blocked, it is possible to more effectively cause the directional discharge of the gas in the downward direction. In addition, according to the configuration of the present disclosure implemented above, it is possible to prevent the gas and the like from passing through another blocking member 120 adjacent to the blocking member 120.

[0106] In addition, a plurality of cans 300 may be provided. The cans 300 may be arranged to respectively face the plurality of discharge holes H. That is, as described above, the discharge holes H and the cans 300 may be arranged in a straight line in the vertical direction between adjacent blocking members 120 among the plurality of blocking members 120 .

[0107] According to the configuration of the present disclosure achieved above, carbon dioxide released from the tank 300 disposed between adjacent blocking members 120 may be discharged only toward the discharge hole H located between the adjacent blocking members 120. That is, since the entire surrounding area of ​​the discharge hole H is blocked, carbon dioxide may be discharged only through the discharge hole H facing the specific tank 300, thereby more effectively removing oxygen, gas, etc. between the adjacent blocking members 120.

[0108] Figure 7 is an exploded perspective view of a cell stack and a busbar frame assembly of a battery module according to an embodiment of the present disclosure, and Figure 8is a cross-sectional view of a battery module on a YZ plane according to an embodiment of the present disclosure.

[0109] In addition, a plurality of discharge holes H and a can 300 may be provided on at least one side of the cell stack 100. In this embodiment, as shown in FIG. Figure 8 As shown in , the discharge hole H and the can 300 may be provided at both sides of the cell stack 100 in the forward / rearward direction (Y-axis direction).

[0110] The battery module 10 of the present disclosure may further include a busbar frame assembly 500. The busbar frame assembly 500 may be disposed inside the module housing 200 to cover at least one side of the battery cell stack 100. Figure 7 As shown in , the bus bar frame assembly 500 may be coupled to the front and rear ends of the cell stack 100 .

[0111] Furthermore, each of the plurality of battery cells 110 may have an electrode lead 112. Specifically, the plurality of battery cells 110 may include an electrode assembly, a cell case accommodating the electrode assembly, and an electrode lead 112 connected to the electrode assembly and extending outside the cell case to serve as an electrode terminal.

[0112] A pair of electrode leads 112 may be provided, and the pair of electrode leads 112 may extend from both ends of the battery cell 110, i.e., in the longitudinal direction (±Y-axis direction). In this case, the pair of electrode leads 112 may be a positive electrode lead and a negative electrode lead. If necessary, the battery cell 110 may have two electrode leads 112 provided only at one end in the Y-axis direction (e.g., +Y-axis direction).

[0113] Reference Figure 7 , the busbar frame assembly 500 will be described in more detail. The busbar frame assembly 500 may include a busbar frame 510 and a plurality of busbars 520. The busbar frame 510 may be configured to be substantially coupled to the front open end and the rear open end of the battery cell stack 100. The busbar frame 510 may be provided with a slit through which the electrode lead 112 of the battery cell 110 may extend in the +Y axis or -Y axis direction. In addition, the busbar frame 510 may be made of, for example, a plastic material having electrical insulation properties, and may be configured so that the busbar 520 may be attached to its outer surface.

[0114] In addition, the bus bar frame 510 may be press-fitted to the front end portion or the rear end portion of the cell stack 100. For example, the bus bar frame 510 may have a coupling groove 511 on an inner surface facing the cell stack 100.

[0115] Reference Figure 6 and Figure 7, the coupling groove 511 may be configured to insert the distal end of the blocking member 120 to a predetermined depth. In this case, the coupling groove 511 may be configured to press-fit the distal end of the blocking member 120 into the coupling groove 511.

[0116] A plurality of coupling grooves 511 may be provided in the stacking direction of the blocking member 120. The number of coupling grooves 511 may be configured as needed according to the number of stacked blocking members 120. Therefore, in the battery module 10 according to the present embodiment, since the bus bar frame 510 having the coupling grooves 511 is coupled to the front and rear ends of the cell stack 100, the stacked blocking members 120 may be stably stored in the module case 200 even without a separate binding member.

[0117] In addition, the plurality of bus bars 520 are means for connecting the battery cells 110 in series and / or in parallel, and may be made of a metal material such as copper, aluminum, nickel, etc., and may be configured in the form of a bar. The electrode leads 112 of the battery cells 110 may extend to the outside of the bus bar frame 510 by passing through the slits of the bus bar frame 510, and the extended portions may be attached to the surface of the bus bar 520 by welding or other methods. When the electrode leads 112 of the battery cells 110 and the bus bars 520 are welded at the front and rear ends of the cell stack 100 in a predetermined pattern, the battery cells 110 may be connected in series and / or in parallel.

[0118] Among the bus bars 520 to which the electrode leads 112 of the battery cells 110 are attached, two bus bars 520 are used as electrode terminals of the battery module 10. Here, the bus bars 520 used as electrode terminals of the battery module 10 are specifically referred to as terminal bus bars 521, and the terminal bus bars 521 include a positive terminal bus bar and a negative terminal bus bar. Figure 7 As shown in FIG. 2 , the terminal bus bar 521 may be configured to extend more to have a length greater than that of the other bus bars 520 so that one end of the terminal bus bar 521 is exposed to the outside of the module housing 200, as shown in FIG. Figure 1 as shown in .

[0119] In the implemented configuration, refer to Figure 8 The module housing 200 is a component having an internal space for accommodating the cell stack 100 and the busbar frame assembly 500 and protecting the cell stack 100 from external influences. The module housing 200 is preferably made of a metal material with high mechanical rigidity. However, the module housing 200 does not necessarily have to be made of a metal material.

[0120] In addition, refer to Figure 8, the plurality of discharge holes H and the tank 300 according to the embodiment of the present disclosure may be disposed inwardly from the bus bar frame assembly 500. According to the configuration of the present disclosure implemented above, in the event of an abnormality in the battery cell 110, the tank 300 may operate to release carbon dioxide before high-temperature gas, etc., exits through the slit of the bus bar frame 510, so that the high-temperature gas, etc. may be guided to be quickly discharged through the discharge hole H.

[0121] Fig. 9 is a diagram illustrating a gas sensor that may be included in a battery module according to an embodiment of the present disclosure.

[0122] In addition, the battery module 10 according to an embodiment of the present disclosure may further include a gas sensor 600. The gas sensor 600 may be configured to detect gas generated from the battery cell 110. The gas sensor 600 may be disposed inside the module case 200.

[0123] If high-temperature exhaust gas is continuously discharged from the battery cells 110, thermal runaway may occur inside the module housing 200 and develop into an explosion instead of sequentially igniting in other adjacent battery cells 110, thereby causing a greater problem. Therefore, the battery module 10 of the present disclosure may be configured to release carbon dioxide stored inside the tank 300 toward the exhaust hole H when the gas sensor 600 detects the generation of gas. That is, the operation of the tank 300 may be determined according to whether the gas sensor 600 detects gas.

[0124] According to the configuration of the present disclosure implemented above, the canister 300 can be selectively operated only when there is a serious danger such as explosion according to whether the gas sensor 600 detects the gas inside the module housing 200, thereby effectively discharging the exhaust gas through the discharge hole H. Therefore, according to the configuration of the present disclosure mentioned above, the flame can be suppressed by discharging the exhaust gas, which is one of the elements causing the flame, to the outside of the module housing 200.

[0125] Reference Fig. 9 , the gas sensor 600 may be disposed in the discharge hole H. The gas sensor 600, the tank 300, and the discharge hole H may be disposed side by side in one direction. Fig. 9 As shown in , the gas sensor 600, the tank 300 and the exhaust hole H can be arranged in the vertical direction (Z axis direction). According to the configuration of the present disclosure implemented above, the gas sensor 600 can be arranged inside the exhaust hole H (the exhaust hole H is a channel for exhausting exhaust gas), and the exhaust gas discharged through the exhaust hole H can be detected.

[0126] A plurality of gas sensors 600 may be provided, and the plurality of gas sensors 600 may be respectively provided in the plurality of exhaust holes H. According to the configuration of the present disclosure implemented above, when exhaust gas is generated from a specific battery cell 110, the gas sensor 600 provided in the exhaust hole H facing the specific battery cell 110 may uniquely detect the exhaust gas. Therefore, no matter which battery cell 110 generates exhaust gas, the exhaust gas may be efficiently discharged to the outside of the module housing 200 and removed.

[0127] Fig.10 is a diagram illustrating a detailed structure of a can that may be included in a battery module according to an embodiment of the present disclosure.

[0128] The tank 300 may include a cylinder unit 310. The cylinder unit 310 may include a storage portion 311 having a space for storing carbon dioxide therein and a release portion 312 extending from the storage portion 311 to release carbon dioxide. Figure 4 and Figure 8 As shown in FIG. 2 , the storage portion 311 may be coupled to the module top plate 220. In this case, the release portion 312 may be configured to protrude from the storage portion 311 toward the inside of the module case 200 (ie, toward the discharge hole H).

[0129] The diameter d of the release portion 312 may be configured to be smaller than the diameter D of the storage portion 311. The release portion 312 may be made of a material having a lower melting point than the storage portion 311. The melting point of the release portion 312 may be close to the temperature of a flame so that it melts and releases carbon dioxide when a flame occurs.

[0130] According to the configuration of the present disclosure achieved above, it is possible to suppress the occurrence of flame by immediately clearing and removing exhaust gas and oxygen, which are elements causing flame, using carbon dioxide quickly released through the release portion 312 of the tank 300 .

[0131] Fig.11 is a diagram illustrating a position of an operating unit of a can that may be included in a battery module according to an embodiment of the present disclosure.

[0132] In addition, the tank 300 may further include an operation unit 320. The operation unit 320 may be connected to the cylinder unit 310. The operation unit 320 may be provided in any configuration that allows the carbon dioxide to be released from the cylinder unit 310.

[0133] In addition, the operation unit 320 may be configured to be electrically connected to the gas sensor 600. Therefore, even if the operation unit 320 and the gas sensor 600 are not directly and physically connected, if the gas sensor 600 detects generation of gas, the operation unit 320 may be configured to release carbon dioxide from the cylinder unit 310.

[0134] For example, a battery pack including a plurality of battery modules 10 according to an embodiment of the present disclosure (see a battery pack described later) Fig.12 1) in the above may include a battery management system (BMS) or a battery management unit (BMU) to process various information, and the BMS or BMU may exchange information with various control devices through a communication bus such as an SPI or CAN interface. In addition, the BMS or BMU may exchange information with each battery module 10 or a cell supervision circuit (CSC) of each battery module 10.

[0135] The information detected by the gas sensor 600 according to the embodiment of the present disclosure may constitute the sensing data of the CSC. With the configuration of this implementation, the information detected by the gas sensor 600 may be transmitted to the BMS or BMU. The BMS or BMU may be connected to the operating unit 320 via a communication bus such as an SPI or CAN interface. If the information detected by the gas sensor 600 is transmitted to the BMS or BMU, and the BMS and BMU may transmit a driving signal of the operating unit 320 to the operating unit 320. The operating unit 320 receiving the driving signal may be configured to release carbon dioxide from the cylinder unit 310.

[0136] like Fig.11 As shown in , the operating unit 320 according to an embodiment of the present disclosure may be provided in a space between the module top plate 220 and the cell stack 100. The operating unit 320 may be attached to a lower portion of the module top plate 220. For example, a plurality of operating units 320 may be provided to be connected to a plurality of cylinder units 310, respectively.

[0137] According to the configuration of the present disclosure implemented above, since multiple operating units 320 are respectively connected to multiple cylinder units 310, carbon dioxide can be released from specific cylinder units 310 according to the location of specific battery cells 110 generating exhaust gas, etc., thereby effectively suppressing flames.

[0138] Fig.12 is a perspective view of a battery pack including a battery module according to an embodiment of the present disclosure.

[0139] Reference Fig.12 According to an embodiment of the present disclosure, the battery pack 1 may include one or more battery modules 10 according to an embodiment of the present disclosure as described above. According to an embodiment of the present disclosure, a plurality of battery modules 10 may be provided in the battery pack 1. For example, Fig.12 As shown in , a plurality of battery modules 10 may be arranged side by side in a horizontal direction (X-axis direction and Y-axis direction).

[0140] The battery pack 1 according to the present disclosure may further include a pack case 20 accommodating a BMS current sensor, a fuse, etc. and the above-mentioned elements for integrated control of charging and discharging of one or more battery modules 10. The pack case 20 may be configured to accommodate a plurality of battery modules 10.

[0141] In addition, the battery pack 1 according to an embodiment of the present disclosure may further include a discharge device V. The discharge device V may be disposed in the battery pack housing 20. The discharge device V may be configured to discharge the gas generated from the battery module 10 to the outside of the battery pack housing 20 when there is an abnormality in the battery module 10. For example, Fig.12 As shown in , a plurality of discharge devices V may be provided on the bottom surface of the battery pack case 20, and the discharge devices V may be communicated with the discharge holes H of the battery module 10. According to the configuration of the present disclosure implemented above, the exhaust gas discharged through the discharge holes H may be discharged downward through the discharge devices V, thereby enabling directional discharge.

[0142] Fig.13 is a perspective view of a battery pack according to another embodiment of the present disclosure, Fig.14 is an exploded perspective view of a battery pack according to another embodiment of the present disclosure, and Fig.15 is a bottom view of a battery pack according to another embodiment of the present disclosure.

[0143] Reference Figures 13 to 15 A battery pack 1' according to another embodiment of the present disclosure will be described. The same reference numerals as those in the above-described embodiment denote the same components, and repeated description of the same components will be omitted and will be described based on differences from the above-described embodiment.

[0144] According to another embodiment of the present disclosure, a battery pack 1 ′ according to another embodiment of the present disclosure may include a cell stack 100 ′, a pack case 20 ′, a discharge device V′, and a can 300 ′.

[0145] The cell stack 100' according to another embodiment of the present disclosure may be accommodated in the battery pack case 20'. That is, the battery pack case 20' according to another embodiment of the present disclosure may be configured to accommodate the cell stack 100'. Although the drawings show that the cell stack 100' is stored without Figure 2 Although the example of the battery cell stack 100 in the module case of the module top plate 220 described in the foregoing description is used, the battery cell stack 100' may be directly stored in the battery pack case 20' without a separate module case to be implemented in a so-called cell-to-battery pack structure.

[0146] In addition, the battery pack 1' may further include an exhaust device V'. The exhaust device V' may be disposed in the battery pack housing 20'. The exhaust device V' may be configured to exhaust the gas generated from the battery cell 110' to the outside of the battery pack housing 20' in the event of an abnormality in the battery cell 110'. For example, Fig.14 As shown in FIG. 1 , a plurality of discharge devices V′ may be formed on the bottom surface of the pack case 20 ′, thereby enabling directional discharge in a downward direction through the discharge devices V′.

[0147] The battery pack 1' according to another embodiment of the present disclosure may further include a tank 300'. The tank 300' may be configured to release the carbon dioxide stored therein toward the discharge device V'. The tank 300' may be arranged in parallel at a position facing the discharge device V', so that when a thermal event occurs in a specific battery cell 110', high-temperature gas or the like may be discharged more quickly through the discharge device V'. As a result, the internal pressure within the battery pack housing 20' may be reduced, thereby reducing the risk of explosion.

[0148] In addition, according to the configuration of the present disclosure achieved above, it is possible to ensure safety and reliability by eliminating the occurrence of flame inside the high temperature gas suppression module housing 20 ′ which is one of the elements causing flame.

[0149] In addition, when the gas is ejected from the battery cell 110', the active material or the plurality of electrode plates inside the battery cell 110' may be heated to a high temperature and discharged to the outside, and these high-temperature particles may appear in the form of sparks. In this case, if the sparks ignite oxygen when they are discharged to the outside of the battery cell 110', this may cause flames or develop into a fire.

[0150] The carbon dioxide stored inside the tank 300' is heavier than oxygen, so when it is released into the combustible material, it forms a non-combustible layer on the surface of the combustible material. Therefore, if the carbon dioxide is released from the tank 300', the supply of oxygen, which is one of the elements causing the flame, can be cut off. Therefore, according to the configuration of the present disclosure implemented above, the carbon dioxide released from the tank 300' can remove the oxygen inside the battery pack case 20'. As a result, it is possible to prevent sparks from reacting with the oxygen inside the battery pack case 20' and generating flames by removing oxygen, which is one of the elements causing the flame.

[0151] In addition, the pack case 20' may include a pack bottom frame 21' and a pack top frame 22'. The pack bottom frame 21' may be configured to support the bottom of the cell stack 100'. The pack bottom frame 21' may be equipped with a discharge device V'.

[0152] The pack top frame 22' may be coupled to the pack bottom frame 21'. At least a portion of the can 300' may be coupled to the pack top frame 22'. In this case, the discharge device V' and the can 300' may be disposed to face each other in a vertical direction.

[0153] In addition, the pack case 20' may include a pair of side frames 23' that respectively cover the front and rear sides of the cell stack 100'. Therefore, the pack case 20' may be configured in a generally rectangular parallelepiped shape.

[0154] Fig.16 is a diagram illustrating an operating direction of a can in a battery pack according to another embodiment of the present disclosure.

[0155] In a battery pack 1' according to another embodiment of the present disclosure, a cell stack 100' may include a plurality of blocking members 120' arranged in one direction between at least one battery cell 110'. The plurality of blocking members 120' may be disposed inside a battery pack housing 20'. A plurality of discharge devices V' may be provided. In particular, the discharge device V' may be provided between adjacent blocking members among the plurality of blocking members 120'.

[0156] Specifically, refer to Fig.15 , the discharge devices V' may be disposed at regular intervals in the left / right direction (X-axis direction) at positions close to both ends of the pack bottom frame 21' in the longitudinal direction (Y-axis direction).

[0157] In addition, according to the present disclosure, a plurality of tanks 300' may be provided. Fig.16 , the tank 300' may be disposed to face the plurality of discharge devices V', respectively. That is, the discharge device V' and the tank 300' may be disposed in a straight line in a vertical direction between adjacent blocking members 120' among the plurality of blocking members 120'.

[0158] According to the configuration of the present disclosure implemented above, the carbon dioxide stored inside the tank 300' can be directly released toward the exhaust device V', thereby removing the high-temperature gas or oxygen exhausted through the exhaust device V'. As a result, safety and reliability can be ensured by eliminating the factors causing the flame and preventing the occurrence of flame inside the battery pack case 20' in the event of an abnormality in the battery cell 110'.

[0159] In addition, according to this configuration, the gas or the like discharged from the battery cells 110' housed between the adjacent blocking members 120' can be discharged downward from the battery pack housing 20' only through the discharge device V' located between the specific adjacent blocking members 120'. That is, since the entire surrounding area of ​​the discharge device V' is blocked, carbon dioxide can be discharged through the discharge device V' facing the specific tank 300', thereby more effectively removing oxygen and gas between the adjacent blocking members 120'. In addition, according to the configuration of the present disclosure implemented above, it is possible to prevent the gas or the like from flowing to another blocking member 120' adjacent to the blocking member 120'.

[0160] In addition, a plurality of discharge devices V' and a tank 300' may be provided on at least one side of the cell stack 100'. Fig.14 As shown in , the discharge device V' and the can 300' may be provided at both sides of the cell stack 100' in the forward / rearward direction (Y-axis direction).

[0161] In addition, refer to Fig.14 , a plurality of battery cell stacks 100' may be provided. The battery pack housing 20' may further include a separator 24'. The separator 24' may be provided in the battery pack bottom frame 21'. The separator 24' may be provided inside the battery pack bottom frame 21' to separate the plurality of battery cell stacks 100'. The plurality of separators 24' may be provided to be spaced apart from each other by a predetermined distance. For example, the separator 24' may include a plurality of walls extending in the X-axis or Y-axis direction.

[0162] According to the configuration of the present disclosure achieved above, since the plurality of cell stacks 100 ′ are separated by the separator 24 ′, even if an abnormal situation occurs in any one of the cell stacks 100 ′, heat can be prevented from propagating to the other cell stacks 100 ′.

[0163] In addition, refer to Fig.16 , the battery pack 1' according to an embodiment of the present disclosure may further include a gas sensor 600'. The gas sensor 600' may be configured to detect gas generated from the battery cell 110'. The gas sensor 600' may be disposed inside the battery pack case 20'.

[0164] If high-temperature exhaust gas is continuously discharged from the battery cells 110', thermal runaway may occur inside the battery pack housing 20' and develop into an explosion instead of sequentially catching fire in other adjacent battery cells 110', thereby causing a greater problem. Therefore, the battery pack 1' of the present disclosure may be configured to release carbon dioxide stored inside the tank 300' toward the exhaust device V' when the gas sensor 600' detects the generation of gas. That is, the operation of the tank 300' may be determined based on whether the gas sensor 600' detects gas.

[0165] According to the configuration of the present disclosure implemented above, depending on whether the gas sensor 600' detects the gas inside the battery pack case 20', the tank 300' can be selectively operated only when there is a serious risk such as explosion, thereby effectively discharging the exhaust gas through the discharge device V'. Therefore, according to the configuration of the present disclosure mentioned above, the flame can be suppressed by discharging the exhaust gas, which is one of the elements causing the flame, to the outside of the battery pack case 20'.

[0166] Reference Fig.16 , the gas sensor 600' may be disposed in the discharge device V'. The gas sensor 600', the tank 300' and the discharge device V' may be disposed side by side in one direction. Fig.16 As shown in , the gas sensor 600', the tank 300' and the exhaust device V' are arranged side by side in the vertical direction (Z axis direction). According to the configuration of the present disclosure implemented above, the gas sensor 600' can be arranged inside the exhaust device V' as a passage for exhaust gas to be discharged therethrough, and the exhaust gas discharged through the exhaust device V' can be detected.

[0167] A plurality of gas sensors 600' may be provided, and the plurality of gas sensors 600' may be provided in a plurality of exhaust devices V', respectively. According to the configuration of the present disclosure implemented above, when exhaust gas is generated from a specific battery cell 110', the gas sensor 600' provided in the exhaust device V' facing the specific battery cell 110' may uniquely detect the exhaust gas. Therefore, no matter which battery cell 110' generates exhaust gas, the exhaust gas may be efficiently discharged to the outside of the battery pack housing 20' and removed.

[0168] Fig.17 is a perspective view of a vehicle including a battery pack according to an embodiment of the present disclosure.

[0169] Reference Fig.17 According to an embodiment of the present disclosure, a vehicle 3 may include one or more battery packs 1 or 1' according to an embodiment of the present disclosure. The vehicle 3 according to the present disclosure may be, for example, an electric vehicle, a hybrid vehicle, or a plug-in hybrid vehicle. The vehicle 3 includes a four-wheel vehicle and a two-wheel vehicle. According to an embodiment of the present disclosure, the vehicle 3 is driven by receiving power from the battery pack 1 or 1'.

[0170] Since the battery pack 1 or 1' has the various effects mentioned above, the vehicle 3 including the battery pack can also have these effects. Specifically, in the case of an abnormality in the battery cell 110, the battery pack 1 or 1' can suppress the occurrence of flames inside the module housing 200 or the battery pack housing 20 by removing the elements that can cause flames. In addition, in the case of an abnormality in the battery cell 110, the exhaust gas can be quickly discharged to the outside of the module housing 200 or the battery pack housing 20, thereby suppressing the flame, and preventing thermal damage to other battery cells 110 to the greatest extent, thereby effectively ensuring the heat propagation prevention performance in the module or battery. Therefore, the vehicle 3 including the battery pack 1 or 1' also has advantages in safety and reliability.

[0171] 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 various modifications and variations may be made by those skilled in the art within the scope of the claims to be described and the technical idea of ​​the present disclosure.

Claims

1. A battery module, comprising: a cell stack, the cell stack comprising a plurality of battery cells arranged to be stacked in one direction; a module housing configured to accommodate the battery cell stack; a discharge hole formed on the module case and configured to discharge a gas generated from the battery cell to the outside of the module case; and A tank at least a portion of which is coupled to the module housing and the tank is configured to release carbon dioxide stored in the tank toward the discharge hole.

2. The battery module according to claim 1, in, The discharge hole is provided on one side of the module housing, and wherein the tank is disposed on the other side of the module housing so as to face the discharge hole.

3. The battery module according to claim 2, in, The module housing comprises: a module bottom plate configured to support the plurality of battery cells at the bottom of the cell stack and on which the drain hole is formed, and A module top plate is coupled to the module bottom plate and at least a portion of the tank is coupled to the module top plate.

4. The battery module according to claim 3, wherein: The discharge hole and the tank are arranged in a straight line in a vertical direction.

5. The battery module according to claim 2, wherein: The battery cell stack comprises: a plurality of blocking members arranged in one direction between at least one of the plurality of battery cells, and Wherein, a plurality of discharge holes are provided between adjacent blocking members among the plurality of blocking members.

6. The battery module according to claim 5, wherein: A plurality of tanks are disposed to face the plurality of discharge holes, respectively.

7. The battery module according to claim 6, wherein: The plurality of discharge holes and the can are disposed on at least one side of the cell stack.

8. The battery module according to claim 7, The battery module further includes a bus bar frame assembly disposed inside the module housing and configured to cover at least one side of the battery cell stack. in, The plurality of drain holes and the can are disposed inwardly from the bus bar frame assembly.

9. The battery module according to claim 1, The battery module further includes a gas sensor disposed inside the module housing and configured to detect gas generated from the battery cells. in, If the gas sensor detects the generation of the gas, the carbon dioxide stored inside the tank is released toward the discharge hole.

10. The battery module according to claim 9, in, The tank comprises: A cylinder unit includes a storage portion having a space for storing carbon dioxide therein and a release portion extending from the storage portion and configured to release carbon dioxide.

11. The battery module according to claim 10, wherein: The diameter of the release portion is smaller than the diameter of the storage portion.

12. The battery module according to claim 10, in, The tank further includes an operation unit connected to the cylinder unit and configured to cause the cylinder unit to release carbon dioxide when the gas sensor detects generation of the gas.

13. The battery module according to claim 12, in, The operating unit is configured to be electrically connected to the gas sensor.

14. A battery pack comprising the battery module according to any one of claims 1 to 13.

15. A battery pack, comprising: a cell stack, the cell stack comprising a plurality of battery cells arranged to be stacked in one direction; a battery pack housing configured to accommodate the battery cell stack; an exhaust device provided in the battery pack case and configured to exhaust gas generated from the battery cells to the outside of the battery pack case; and A tank at least a portion of which is coupled to the battery case and the tank is configured to release carbon dioxide stored in the tank toward the exhaust device.

16. The battery pack according to claim 15, in, The battery pack housing comprises: a battery pack bottom frame configured to support the bottom of the battery cell stack and having the discharge device; and A battery top frame is coupled to the battery bottom frame and at least a portion of the can is coupled to the battery top frame.

17. The battery pack according to claim 16, wherein: The discharge device and the tank are disposed to face each other in a vertical direction.

18. The battery pack according to claim 15, in, The battery cell stack comprises: a plurality of blocking members arranged in one direction between at least one of the plurality of battery cells, and Wherein, a plurality of discharge devices are arranged between adjacent blocking members among the plurality of blocking members.

19. The battery pack according to claim 18, wherein: A plurality of tanks are disposed to face the plurality of discharge devices, respectively.

20. The battery pack according to claim 19, in, The plurality of drains and the can are disposed on at least one side of the cell stack.

21. The battery pack according to claim 15, The battery pack further includes a gas sensor disposed inside the battery pack housing and configured to detect gas generated from the battery cells. in, If the gas sensor detects the generation of the gas, the carbon dioxide stored inside the tank is released toward the discharge device.

22. The battery pack according to claim 16, in, A plurality of battery cell stacks are provided, and The battery pack housing further comprises a separator, which is configured to separate the plurality of battery cell stacks within the battery pack bottom frame.

23. A vehicle comprising the battery pack according to claim 14.

24. A vehicle comprising a battery pack according to any one of claims 15 to 22.

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