Battery module and battery pack including the same

Abstract

A battery module according to one embodiment of the present invention includes a housing that houses a battery cell stack having a plurality of stacked battery cells and includes a pair of holes arranged opposite each other, and an exhaust guide member that covers one of the pair of holes and forms a path for gas to flow inside and outside the housing.

Description

[Technical field]

[0001] [Cross-reference to related applications] This application claims the benefit of priority based on Korean Patent Application No. 10-2021-0171713 dated December 3, 2021, and all contents disclosed in the documents of that Korean patent application are incorporated herein by reference.

[0002] The present invention relates to a battery module and a battery pack including the same, and more particularly to a battery module with an improved exhaust gas path and a battery pack including the same. [Background technology]

[0003] With the technological development and increasing demand for mobile devices, the demand for secondary batteries as an energy source is rapidly increasing. Accordingly, research on secondary batteries that can meet various requirements is being actively conducted.

[0004] Secondary batteries are attracting attention not only as an energy source for mobile devices such as mobile phones, digital cameras, and laptops, but also as an energy source for power devices such as electric bicycles, electric cars, and hybrid electric cars.

[0005] In recent years, the need for large-capacity secondary battery structures has increased, including the use of secondary batteries as energy storage sources, and there is a growing demand for medium- to large-sized modular battery packs that combine battery modules in which multiple secondary batteries are connected in series / parallel.

[0006] Meanwhile, when a battery pack is constructed by connecting a plurality of battery cells in series / parallel, a battery module is generally constructed including at least one battery cell, and other components (e.g., electronic devices) are added to the at least one battery module to construct a battery pack. Since the battery cells constituting such a medium- to large-sized battery module are secondary batteries capable of being charged and discharged, a large amount of heat is generated from the battery module during the charging and discharging process.

[0007] Typically, a battery module includes a battery cell stack in which a plurality of battery cells are stacked, a frame that houses the battery cell stack, and end plates that are connected to the frame to cover front and rear surfaces of the battery cell stack.

[0008] The frame and the end plates may be joined to be hermetically sealed by welding. When the frame housing the battery cell stack and the end plates are joined in this manner, if the internal pressure of the battery cells increases during overcharging of the battery module and exceeds the limit of the fusion strength of the battery cells, high temperature heat, gas, and flames generated from the battery cells can be discharged to the outside of the battery cells.

[0009] At this time, the high-temperature heat, gas, and flames are discharged through openings formed in the end plates. However, in a battery pack structure in which multiple battery modules are arranged with the end plates facing each other, the high-temperature heat, gas, and flames may affect battery modules adjacent to the battery module that is emitting the high-temperature heat, gas, and flames.

[0010] This can damage the terminal bus bars located on the end plates of the adjacent battery modules, and can allow high temperature heat, gas and flames to enter the interior of the battery modules through openings located in the end plates of the adjacent battery modules, causing damage to multiple battery cells. Summary of the Invention [Problem to be solved by the invention]

[0011] An object of the present invention is to provide a battery module configured to impart directionality to gas discharged from the battery module, and a battery pack including the battery module.

[0012] However, the problems to be solved by the embodiments of the present invention are not limited to the above problems, and can be variously expanded within the scope of the technical ideas included in the present invention. [Means for solving the problem]

[0013] A battery module according to a first aspect of the present invention includes a housing that houses a battery cell stack in which a plurality of battery cells are stacked and includes a pair of holes arranged opposite each other, and an exhaust guide member that covers one of the pair of holes and forms a path for gas to flow inside and outside the housing.

[0014] The housing may include a module frame including an opening disposed opposite an internal space for accommodating the battery cell stack, and first and second end plates respectively covering the opening and coupled to the module frame.

[0015] The pair of holes may include a first hole provided in the first end plate and a second hole provided in the second end plate, and the exhaust guide member may cover one of the first hole and the second hole, for example the second hole, and be installed in the housing.

[0016] The exhaust guide member may include an internal space communicating with any one of the holes and an exhaust port exposing the internal space to the outside of the housing, and may include a cover provided on any one of the first end plate and the second end plate, for example, the second end plate.

[0017] The module frame may have a rectangular tubular shape including a pair of oppositely disposed wide sides and a pair of oppositely disposed narrow sides, and the cover may be installed on any one of the end plates with the exhaust port disposed on at least one of the four sides of the module frame.

[0018] The area of ​​the outlet may be smaller than the area of ​​any one of the holes, for example the second hole.

[0019] The exhaust direction of gas exhausted from inside the housing through the exhaust port and the exhaust direction of gas exhausted from inside the housing through another hole of the first hole and the second hole, for example the first hole, can be configured to face in the same direction.

[0020] The cover may include a first cover part having a first internal space configured to guide gas discharged from any one of the holes in a first direction and fixed to any one of the end plates; and a second cover part having a second internal space configured to guide gas discharged from the first internal space in a second direction and discharged from the exhaust port and connected to the first cover part.

[0021] The second cover portion can be fixed to any one of the faces of the module frame, for example, one of a pair of wide faces.

[0022] At least one of the first hole, the second hole, and the exhaust port may be provided with a fireproof member.

[0023] In a battery module according to a second aspect of the present invention, the housing includes a module frame having an opening and in which the battery cell stack is housed, and an end plate covering the opening and coupled to the module frame, and the pair of holes includes a first hole provided in the end plate and a second hole provided in a portion of the module frame disposed opposite the end plate.

[0024] The exhaust guide member may include an internal space communicating with the second hole and an exhaust port exposing the internal space to the outside of the housing, and may include a cover provided at a portion of the module frame.

[0025] The module frame has a rectangular cylindrical shape including a pair of wide sides arranged opposite to each other, a pair of narrow sides arranged opposite to each other, and a side facing the opening and through which the second hole is provided, and the cover may be installed on a side of the module frame with the exhaust port disposed on at least one of the pair of wide sides and the pair of narrow sides.

[0026] The area of ​​the outlet may be smaller than the area of ​​the second hole.

[0027] The exhaust direction of gas exhausted from inside the housing through the exhaust port and the exhaust direction of gas exhausted from inside the housing through the first hole may be configured to face in the same direction.

[0028] The cover may include a first cover part having a first internal space configured to guide gas discharged through the second hole in a first direction and fixed to a side of the module frame, and a second cover part having a second internal space configured to guide gas discharged through the first internal space in a second direction and discharged from the exhaust port and connected to the first cover part.

[0029] The second cover portion can be fixed to at least one of a pair of wide surfaces and a pair of narrow surfaces of the module frame.

[0030] At least one of the first hole, the second hole, and the exhaust port may be provided with a fireproof member.

[0031] According to a third aspect of the present invention, a battery pack may include a pack frame that surrounds the battery modules, and a first battery module and a second battery module that are aligned in one direction among the battery modules are disposed such that their discharge guide members face each other. Effect of the Invention

[0032] The battery module according to the embodiment of the present invention allows gas generated from the battery cells to flow in a directional manner when an emergency occurs in the battery cells, such as thermal runaway. Therefore, when a battery pack is formed using the battery modules according to the embodiment, high-temperature gas discharged from one battery module can be prevented from being discharged toward other battery modules, and the battery modules can be prevented from being damaged by the discharged gas, which can shorten their lifespan.

[0033] Furthermore, when the battery module according to the embodiment of the present invention includes a flame retardant material, the ratio of flames contained in the induced exhaust gas passing through the flame retardant material can be increased, thereby improving the flame retardant effect.

[0034] The effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims. [Brief description of the drawings]

[0035] [Figure 1] 1 is a perspective view showing a battery module according to an embodiment of the present invention; [Diagram 2] 2 is a perspective view of a battery cell included in the battery module of FIG. 1. [Diagram 3] FIG. 2 is a partially exploded perspective view showing the battery module of FIG. [Figure 4] FIG. 2 is a cross-sectional view showing the battery module of FIG. [Diagram 5] 1 is a diagram showing a battery pack including a battery module according to an embodiment of the present invention. [Figure 6] FIG. 4 is a partially exploded perspective view showing a battery module according to another embodiment of the present invention. [Figure 7] FIG. 6 is a partially exploded perspective view showing a battery module 600 according to another embodiment of the present invention. [Figure 8] FIG. 8 is a perspective view showing a coupled state of the battery modules in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0036] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings, in which: FIG. 1 is a block diagram of a semiconductor device according to an embodiment of the present invention;

[0037] In order to clearly explain the present invention, parts that are not necessary for the description will be omitted, and the same reference numerals will be used to refer to the same or similar components throughout the specification.

[0038] In addition, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and the present invention is not necessarily limited to those shown. In the drawings, thicknesses are enlarged to clearly express multiple layers and regions. In the drawings, thicknesses of some layers and regions are exaggerated for convenience of explanation.

[0039] In addition, when a part such as a layer, film, region, or plate is said to be "on" or "above" another part, this includes not only the case where it is "directly above" the other part, but also the case where there is another part in between. Conversely, when a part is said to be "directly above" another part, it means that there is no other part in between. In addition, being "on" or "above" a reference part means being located above or below the reference part, and does not necessarily mean being "on" or "above" the opposite direction of gravity.

[0040] Additionally, throughout the specification, when a part is said to "comprise" other components, this means that it can further include the other components, not excluding the other components, unless otherwise specified.

[0041] Also, throughout the specification, "in a plane" means when the part in question is viewed from above, and "in cross section" means when the part in question is cut vertically and viewed from the side.

[0042] Fig. 1 is an exploded perspective view showing a battery module according to an embodiment of the present invention, Fig. 2 is a perspective view of a battery cell included in the battery module of Fig. 1. Fig. 3 is a partial exploded perspective view of the battery module of Fig. 1, and Fig. 4 is a cross-sectional view of the battery module of Fig. 1.

[0043] The battery module according to an embodiment of the present invention is configured to allow high-temperature heat, gas, or flames generated from the battery cells to be exhausted in a directional manner during thermal runaway.

[0044] 1 to 4, a battery module 100 according to an embodiment of the present invention includes a battery cell stack 120 in which a plurality of battery cells 110 are stacked, and a housing 150 that houses the battery cell stack 120.

[0045] 2, the battery cell 110 is a secondary battery and may be configured as a pouch-type secondary battery. The battery cell 110 may include an electrode assembly 113, a cell case 114, and electrode leads 111 and 112 protruding from the electrode assembly 113.

[0046] The electrode assembly 113 may be composed of a positive electrode plate, a negative electrode plate, a separator, etc. The cell case 114 is for packaging the electrode assembly 113 and is made of a laminate sheet including a resin layer and a metal layer. The cell case 114 may include a case body 113B and a cell terrace 116.

[0047] The case body 113B can accommodate the electrode assembly 113. For this purpose, the case body 113B is provided with an accommodation space capable of accommodating the electrode assembly 113. The cell terrace 116 extends from the case body 113B and can be sealed so as to hermetically seal the electrode assembly 113.

[0048] The electrode leads 111, 112 can be electrically connected to an electrode assembly 113. Such electrode leads 111, 112 can be configured as a pair including a negative electrode lead 111 and a positive electrode lead 112. Parts of the pair of electrode leads 111, 112 can protrude to the outside of the cell terrace 116 from the front (+x-axis direction) and rear (-x-axis direction) of the cell casing 114, respectively.

[0049] Meanwhile, the battery cell 110 can be manufactured by sealing both ends 114a, 114b of the cell case 114 and one side 114c connecting them in a state where the electrode assembly 113 is housed in the cell case 114. That is, the battery cell 110 according to this embodiment has a total of three sealing parts 114sa, 114sb, and 114sc, and the sealing parts 114sa, 114sb, and 114sc are structured to be sealed by a method such as heat fusion, and the other side is formed by a connecting part 115.

[0050] In addition, the connecting portion 115 may extend long along one edge of the battery cell 110, and a protruding portion 110p of the battery cell 110 called a bat-ear is formed at an end of the connecting portion 115. In addition, the cell case 114 is sealed by sandwiching the protruding electrode leads 111 and 112.

[0051] The above-described configuration of the battery cells 110 is merely an example, and the shape of the battery cells 110 for forming the battery cell stack may be modified in various ways.

[0052] 1 to 4, a plurality of battery cells 110 are configured, and the plurality of battery cells 110 can be stacked so as to be electrically connected to each other by bus bars (not shown) to form a battery cell stack 120.

[0053] The housing 150 in which the battery cell stack 120 is housed can be configured to include a module frame 200 , a first end plate 301 , and a second end plate 302 .

[0054] The module frame 200 may be configured as a rectangular tube-shaped frame having a pair of wide sides 200a and a pair of narrow sides 200b. As a result, the module frame 200 may have a structure in which it has an accommodation space for accommodating the battery cell stack 120 and has openings 200c arranged opposite each other along the length direction (x). Such a module frame 200 may be formed by extrusion molding, and may be configured by connecting plate materials that make up the wide side 200a and the narrow side 200b by welding or by connecting means such as screws or rivets.

[0055] The first end plate (or front end plate) 301 and the second end plate (or rear end plate) 302 cover the opening 200c of the module frame 200 and are fixed to both ends of the module frame 200 by welding or the like to cover both sides of the battery cell stack 120, for example, the front and rear sides.

[0056] The first end plate 301 and the second end plate 302 each include holes 301a and 302a that function as a vent portion. Here, the vent portion refers to a portion for discharging heat, gas, and flames contained in the gas inside the battery module 100 to the outside of the battery module 100.

[0057] Each hole 301a, 302a may be provided with a certain size and shape in the main body 301b of the first end plate 301 and the main body of the second end plate 302. In this embodiment, the first end plate 301 and the second end plate 302 are formed in a rectangle that is long in a direction (y) perpendicular to the length direction (x) of the housing 150, so that each hole 301a, 302a also has a corresponding rectangular shape. In this case, the first hole 301a of the first end plate 301 and the second hole 302a of the second end plate 302 may have the same size and shape or different sizes and shapes, and this embodiment is the latter case.

[0058] When the first end plate 301 and the second end plate 302 are attached to the module frame 200, the first hole 301a of the first end plate 301 and the second hole 302a of the second end plate 302 are arranged opposite each other, and an exhaust guide member 400 is provided on one of the first end plate 301 and the second end plate 302.

[0059] In this embodiment, the discharge guide member 400 covers the second hole 302 a of the second end plate 302 and is provided on the second end plate 302 .

[0060] The discharge guide member 400 includes a cover 402 having an internal space 402a communicating with the second hole 302a and a discharge port 402b exposing the internal space 402a to the outside of the housing 150.

[0061] More specifically, the cover 402 includes a first cover part 4020 having a first internal space 4020a configured so that gas discharged from the battery cell 110 and discharged through the second hole 302a is guided in a first direction (see the direction of arrow (1) shown in FIG. 4), and a second cover part 4022 having a second internal space 4022a configured so that gas discharged through the first internal space 4020a is guided in a second direction (see the direction of arrow (2) shown in FIG. 4).

[0062] The first cover part 4020 and the second cover part 4022 may be configured as a single structure connected to each other so that the first internal space 4020a and the second internal space 4022a are continuously connected to each other. In this case, the exhaust port 402b may be configured in a form in which one end of the second cover part 4022 is opened, but the configuration of the exhaust port is not necessarily limited thereto.

[0063] The cover 402 can be installed in the housing 150 by fixing the first cover part 4020 to the second end plate 302 while entirely covering the second hole 302a, and fixing the second cover part 4022 to the wide surface 200a so that the exhaust port 402b is located on the upper surface of the module frame 200, i.e., on one surface (the surface located on the upper side in the drawing) of the pair of wide surfaces 200a. When the cover 402 is installed in the housing 150, the area of ​​the exhaust port 402b may be smaller than the area of ​​the second hole 302a of the second end plate 302.

[0064] With the cover 402 fixed in this manner, the exhaust port 402b is positioned in a direction facing the first end plate 301, so that gas flowing through the internal space 402a of the cover 402 can be discharged through the exhaust port 402b in a direction facing the first end plate 301.

[0065] In other words, the discharge direction of gas discharged through exhaust port 402b inside housing 150 (see the direction of arrow (3) shown in FIG. 4) and the discharge direction of gas discharged through first hole 301a of first end plate 301 inside the housing (see the direction of arrow (4) shown in FIG. 4) can be in the same direction (toward the left with respect to FIG. 4).

[0066] In this manner, the cover 402, i.e., the exhaust guide member 400, can form a path for gas to flow between the inside and outside of the housing 150.

[0067] Meanwhile, in this embodiment, the exhaust port 402b of the cover 402 is disposed on the upper wide surface 200a of the module frame 200, but the position of the exhaust port 402b is not necessarily limited to this.

[0068] The exhaust port 402b may be disposed on at least one of the four faces of the module frame 200, for example, on the narrow face 200b of the module frame 200, and may also be disposed on both the wide face 200a and the narrow face 200b.

[0069] FIG. 5 is a diagram showing a battery pack 1000 according to an embodiment of the present invention.

[0070] The battery pack 1000 may include a plurality of, for example, two or more, battery modules 100. The battery modules 100 are housed in a pack frame 1000a, and various control and protection systems, such as a BMS (Battery Management System) and a cooling system, may be attached to the pack frame 1000a together.

[0071] Among the plurality of battery modules 100, the first battery module 100a and the second battery module 100b may be aligned in one direction (x) such that the discharge guide members 400a, 400b face each other.

[0072] Specifically, the first battery module 100a is positioned so that the exhaust outlet 4000a of the cover 410a, which is the exhaust guiding member 400a, faces the -x-axis direction, and the second battery module 100b is positioned so that the exhaust outlet 4000b of the cover 412b, which is the exhaust guiding member 400b, faces the +x-axis direction.

[0073] In such a battery pack 1000, when gas is discharged from the battery cells of the battery module 100 when the battery module 100 is in an abnormal state, the gas flowing from the inside of each battery module 100a, 100b toward the first holes 3010a', 3010b' of the first end plates 3010a, 3010b can be discharged to the outside of the battery modules 100a, 100b through the first holes 3010a', 3010b'.

[0074] In addition, gas flowing from the inside of each battery module 100a, 100b toward the second holes 3012a', 3012b' of the second end plates 3012a, 3012b hits the covers 410a, 412b, and some of the gas flows toward the first holes 3010a', 3010b' of the first end plates 3010a, 3010b, thereby being discharged to the outside of the battery modules 100a, 100b, and some of the gas can be discharged to the outside of the battery modules 100a, 100b through the exhaust ports 4000a, 4000b of the covers 410a, 412b.

[0075] At this time, the gas discharged through the exhaust port 4000a of the first battery module 100a does not flow toward the second battery module 100b but flows in the opposite direction, and the gas discharged through the exhaust port 4000b of the second battery module 100b does not flow toward the first battery module 100a but flows in the opposite direction, and can be discharged to the outside of the pack frame 1000a. Therefore, in the battery pack 1000 according to an embodiment of the present invention, it is possible to prevent or reduce the occurrence of mutual damage caused by the gas discharged from each battery module 100a, 100b.

[0076] 6, when a flame retardant (or ignition prevention) member 500 is installed in the first hole 301a of the first end plate 301, the second hole 302a of the second end plate 302, and the exhaust port 402b of the cover 402, if the gas discharged through the first hole 301a, the second hole 302a, and the exhaust port 402b contains flames, the flames can be further blocked. Such a flame retardant member 500 can be made of a mesh structure made of copper material with good thermal conductivity.

[0077] FIG. 6 shows that the flame retardant material 500 is installed in all of the first hole 301a of the first end plate 301, the second hole 302a of the second end plate 302, and the exhaust outlet 402b of the cover 402, but the present invention is not necessarily limited to this, and the flame retardant material may be installed in at least one of the first hole 301a, the second hole 302a, and the exhaust outlet 402b.

[0078] Fig. 7 is a partially exploded perspective view showing a battery module 600 according to another embodiment of the present invention, and Fig. 8 is a perspective view showing the assembled state of the battery module of Fig. 7. The configuration of the battery module 600 of Figs. 7 and 8 is the same as that of the battery module 100 of Figs. 1 and 3, but only the configuration of the module frame of the housing is different. For convenience, only the module frame of the housing will be described in detail below, and the same reference numerals will be used for the same components as those of the battery module 100 of Figs. 1 and 3.

[0079] The module frame 710 of the housing 700 according to the embodiment of FIGS. 7 and 8 is configured as a rectangular cylindrical structure including a pair of wide sides 710a, a pair of narrow sides 710b, and a side 710c. Thus, the portion of the module frame 710 facing the side 710c is configured as an opening. Furthermore, a second hole 7010c is provided in the side 710c of the module frame 710. The second hole 7010c may have a size and shape corresponding to the second hole 302a provided in the second end plate 302 in FIGS. 1 and 3. Such a module frame 710 may be formed into a single body by pressing or the like.

[0080] A first end plate 301 is disposed and fixed to the module frame 710 on the opening side, and a cover 402 which is a discharge guide member 400 is fixed to a side surface 710c of the module frame 710 so as to cover the second hole 7010c.

[0081] The battery module 600 of FIGS. 7 and 8 configured in this manner is also configured as a battery pack as shown in FIG. 5, and damage caused by gas discharged from the battery module 600 can be reduced or prevented.

[0082] In addition, since the fireproof member shown in FIG. 6 can be applied to the battery module 600 in FIG. 7 and FIG. 8, damage to the battery module due to fire can also be prevented.

[0083] The battery modules and battery packs according to the above-described embodiments may be applied to various devices, specifically, to transportation means such as electric bicycles, electric vehicles, and hybrid vehicles, but are not limited thereto, and may be applied to various devices that can use secondary batteries.

[0084] Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims also fall within the scope of the present invention. [Explanation of symbols]

[0085] 100, 600: Battery module 120: Battery cell stack 150, 700: Housing 200, 710: Module frame 301: 1st end plate 302: 2nd end plate 301a: Hall 1 302a, 7010c: Hall 2 710c: Side

Claims

1. A battery module including a housing that houses a battery cell stack in which a plurality of battery cells are stacked, and that includes a pair of holes arranged opposite to each other, and a discharge guiding member that covers one of the pair of holes and forms a path for gas to flow inside and outside the housing. The discharge guiding member forms a path for the gas such that the gas discharged from one of the pair of holes does not flow toward an adjacent other battery module.

2. The housing includes a module frame that includes an opening arranged opposite to an internal space for housing the battery cell stack, and a first end plate and a second end plate that cover the openings and are coupled to the module frame. The pair of holes includes a first hole provided in the first end plate, and a second hole provided in the second end plate. The discharge guiding member covers one of the first hole and the second hole and is provided in the housing. The battery module according to claim 1.

3. The discharge guiding member includes an internal space communicating with one of the holes, and a discharge port that exposes the internal space to the outside of the housing. The battery module according to claim 2, further including a cover provided on one of the first end plate and the second end plate.

4. The module frame has a rectangular tube shape including a pair of wide surfaces arranged opposite to each other and a pair of narrow surfaces arranged opposite to each other. The cover arranges the discharge port on at least one of the four surfaces of the module frame and is provided on one of the end plates. The battery module according to claim 3.

5. The area of the discharge port is smaller than the area of one of the holes. The battery module according to claim 4.

6. The discharge direction of the gas discharged from the inside of the housing through the discharge port and the discharge direction of the gas discharged from the inside of the housing through the other one of the first hole and the second hole are configured to face the same direction. The battery module according to claim 4.

7. The cover ​ ​ ​ ​ It has a first internal space configured such that the gas discharged through any one of the holes is guided in the first direction, and a first cover portion fixed to any one of the end plates. It has a second internal space configured such that the gas discharged through the first internal space is guided in the second direction and discharged from the discharge port, and a second cover portion connected to the first cover portion. The battery module according to claim 3, including the above.

8. The battery module according to claim 7, wherein the second cover portion is fixed to any one surface of the module frame.

9. The battery module according to claim 3, wherein a flameproof member is provided in at least one of the first hole, the second hole, and the discharge port.

10. The housing includes a module frame having an opening and accommodating the battery cell stack body therein, and an end plate covering the opening and coupled to the module frame. including The pair of holes include a first hole provided in the end plate, and a second hole provided in a part of the module frame disposed opposite to the end plate. The battery module according to claim 1.

11. The discharge guiding member includes an internal space communicating with the second hole, and a discharge port exposing the internal space to the outside of the housing. including The battery module according to claim 10, including a cover provided in a part of the module frame.

12. The module frame has a rectangular tube shape including a pair of wide surfaces disposed opposite to each other, a pair of narrow surfaces disposed opposite to each other, and a side surface facing the opening and provided with the second hole. The battery module according to claim 11, wherein the cover disposes the discharge port on at least one of the pair of wide surfaces and the pair of narrow surfaces, and is provided on the side surface of the module frame.

13. The battery module according to claim 12, wherein the area of the discharge port is smaller than the area of the second hole.

14. The battery module according to claim 12, wherein the discharge direction of the gas discharged from the inside of the housing through the discharge port and the discharge direction of the gas discharged from the inside of the housing through the first hole are configured to face the same direction.

15. The cover It has a first internal space configured such that the gas discharged through the second hole is guided in a first direction, and a first cover portion fixed to a side surface of the module frame. It has a second internal space configured such that the gas discharged through the first internal space is guided in a second direction and discharged from the discharge port, and a second cover portion connected to the first cover portion. The battery module according to claim 11, comprising the above.

16. The battery module according to claim 15, wherein the second cover portion is fixed to at least one of a pair of wide surfaces and a pair of narrow surfaces of the module frame.

17. The battery module according to claim 11, wherein a flameproof member is provided in at least one of the first hole, the second hole, and the discharge port.

18. A plurality of battery modules according to any one of claims 1 to 9, A pack frame surrounding the plurality of battery modules, comprising, In a battery pack, a first battery module and a second battery module arranged in alignment along one direction among the plurality of battery modules are arranged such that their respective discharge guiding members face each other.

19. A plurality of battery modules according to any one of claims 10 to 17, A pack frame surrounding the plurality of battery modules, comprising, In a battery pack, a first battery module and a second battery module arranged in alignment along one direction among the plurality of battery modules are arranged such that their respective discharge guiding members face each other.

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