Battery module and battery pack including the same

Abstract

A battery module according to one embodiment of the present invention comprises a battery cell stack having a plurality of battery cells stacked thereon, a module frame that accommodates the battery cell stack and includes a plurality of venting holes on at least one surface, end plates disposed on both sides of the battery cell stack, and a flame-retardant cover that covers the plurality of venting holes.

Description

Technology Field

[0001] The present invention relates to a battery module and a battery pack including the same, and more specifically, to a battery module with enhanced safety and a battery pack including the same. Background Technology

[0002] In modern society, as the use of portable devices such as mobile phones, laptops, camcorders, and digital cameras has become commonplace, the development of technologies related to such mobile devices is becoming active. Furthermore, rechargeable secondary batteries are being utilized as power sources for electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (P-HEVs) as a solution to address air pollution caused by conventional gasoline vehicles using fossil fuels; consequently, the need for the development of secondary batteries is increasing.

[0003] Currently commercialized rechargeable batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium-ion batteries. Among these, lithium-ion batteries are gaining attention for their advantages, such as the ability to charge and discharge freely with almost no memory effect compared to nickel-based batteries, a very low self-discharge rate, and high energy density.

[0004] These lithium secondary batteries primarily use lithium-based oxides and carbon materials as the positive and negative active materials, respectively. The lithium secondary battery comprises an electrode assembly in which a positive plate and a negative plate, each coated with the positive and negative active materials, are arranged with a separator in between, and a battery case that seals and houses the electrode assembly together with an electrolyte.

[0005] Generally, lithium secondary batteries can be classified according to the shape of the casing into can-type secondary batteries, in which the electrode assembly is embedded in a metal can, and pouch-type secondary batteries, in which the electrode assembly is embedded in a pouch of aluminum laminate sheet.

[0006] In the case of secondary batteries used in small devices, 2 to 3 battery cells are arranged, whereas in the case of secondary batteries used in medium to large devices such as automobiles, battery modules in which multiple battery cells are electrically connected are used. In such battery modules, capacity and output are improved by connecting multiple battery cells in series or parallel to form a stack of battery cells. One or more battery modules can be mounted together with various control and protection systems, such as a Battery Disconnect Unit (BDU), a Battery Management System (BMS), and a cooling system, to form a battery pack.

[0007] FIG. 1 is a perspective view showing a conventional battery module.

[0008] Referring to FIG. 1, a conventional battery module (10) can be manufactured by housing a battery cell stack (not shown) in a module frame (20) and then attaching an end plate (40) to an open part of the module frame (20). At this time, a connection opening (41H) in which a part of a terminal busbar is exposed and a module connector opening (42H) in which a part of a module connector is exposed may be formed in the end plate (40). The connection opening (41H) is intended to guide the HV (High voltage) connection of the battery module (10), and the terminal busbar exposed through the connection opening (41H) can be connected to another battery module or a BDU (Battery Disconnect Unit). The module connector opening (42H) is intended to guide the LV (Low voltage) connection of the battery module (10), and the module connector exposed through the module connector opening (42H) is connected to the BMS (Battery Management System) to transmit voltage information or temperature information of the battery cell.

[0009] FIG. 2 is a diagram showing the appearance of a battery module igniting in a conventional battery pack equipped with the battery module of FIG. 1. FIG. 3 is a cross-sectional view taken along the cutting line I-I' of FIG. 2, showing the appearance of a flame affecting an adjacent battery module when the conventional battery module ignites.

[0010] Referring to FIGS. 1 to 3, a conventional battery module (10) includes a battery cell stack in which a plurality of battery cells (11) are stacked, a module frame (20) that accommodates the battery cell stack, and end plates (40) formed on the front and rear surfaces of the battery cell stack.

[0011] When physical, thermal, or electrical damage occurs to the battery cell, including overcharging, the internal pressure of the battery cell (11) increases and exceeds the fusion strength limit of the battery cell (11), high-temperature heat, gas, and flame generated in the battery cell (11) may be discharged to the outside of the battery cell (11).

[0012] At this time, high-temperature heat, gas, and flames can be discharged through openings (41H, 42H) formed in the end plates (40). In a battery pack structure in which a plurality of battery modules (10) are arranged so that the end plates (40) face each other, high-temperature heat, gas, and flames ejected from the battery modules (10) can affect neighboring battery modules (10). Accordingly, terminal busbars formed on the end plates (40) of neighboring battery modules may be damaged, and high-temperature heat, gas, and flames may enter the interior of the battery modules (10) through the openings formed in the end plates (40) of neighboring battery modules (10) and cause damage to a plurality of battery cells (11) and other electrical components. Furthermore, this leads to heat propagation to neighboring battery modules (10), causing a chain reaction of ignition within the battery pack.

[0013] Accordingly, there is a need to develop technology capable of controlling high-temperature flames to minimize the impact on neighboring battery modules when thermal propagation occurs within the battery module. The problem to be solved

[0014] The problem that the present invention aims to solve is to provide a battery module and a battery pack including the same, which, when a fire occurs within the battery module, can rapidly discharge a large amount of gas and simultaneously prevent airborne conductive materials emitted from the cell where the fire occurred from transferring to an adjacent module or damaging components.

[0015] However, the problems that the embodiments of the present invention aim to solve are not limited to the problems described above and can be expanded in various ways within the scope of the technical ideas included in the present invention. means of solving the problem

[0016] A battery module according to one embodiment of the present invention comprises a battery cell stack having a plurality of battery cells stacked thereon, a module frame that accommodates the battery cell stack and includes a plurality of venting holes on at least one surface, end plates disposed on both sides of the battery cell stack, and a flame-retardant cover that covers the plurality of venting holes.

[0017] The plurality of venting holes are formed on the upper surface of the module frame, and the flame extinguishing cover may include a flame extinguishing portion corresponding to the plurality of venting holes and a busbar cover portion corresponding to the upper part of the end plate.

[0018] The above-mentioned anti-inflammatory part may include a micro-perforated structure.

[0019] The above-mentioned anti-inflammatory part may include a mesh structure.

[0020] The above battery cell stack further includes a terminal busbar connecting the battery cell stack and an external device, the end plate includes a connection opening that exposes the terminal busbar, and the busbar cover can cover the connection opening.

[0021] The busbar cover portion may include a stepped portion for connecting an external busbar at a position corresponding to the terminal busbar.

[0022] The above busbar cover portion may further include an outer busbar cover formed to cover the outer busbar in correspondence with the stepped portion.

[0023] The above-mentioned outer busbar cover can be rotatably coupled to the busbar cover portion by a hinge portion.

[0024] The above end plate further includes a first through hole into which a connecting member for mounting the battery module to a battery pack is inserted, and the above flame-retardant cover may further include a second through hole corresponding to the first through hole.

[0025] A battery pack according to another embodiment of the present invention includes the battery module described above. Effects of the invention

[0026] According to embodiments of the present invention, when an ignition phenomenon occurs within a battery module, high-temperature gas can be rapidly discharged to the outside while suppressing the discharge of high-temperature flames. In addition, it is possible to prevent fragments that may fly from the cell where the ignition phenomenon occurred from being transferred to an adjacent module or damaging components.

[0027] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims. Brief explanation of the drawing

[0028] FIG. 1 is a perspective view showing a conventional battery module. Figure 2 is a drawing showing the appearance of the battery module at the time of ignition in a conventional battery pack equipped with the battery module of Figure 1. Figure 3 is a cross-sectional view showing a cross-section cut along the cutting line I-I' of Figure 2. FIG. 4 is a perspective view showing a battery module according to one embodiment of the present invention. Fig. 5 is an exploded perspective view of the battery module of Fig. 4. FIG. 6 is a perspective view showing a battery cell included in the battery module of FIG. 5. Figure 7 is an enlarged view of part B of Figure 5. FIG. 8 is a perspective view showing an anti-inflammatory cover in a modified embodiment of the present invention. FIG. 9 is an enlarged view of part B of FIG. 5 in another modified embodiment of the present invention. Figure 10 is a drawing showing the external busbar cover in Figure 9. Specific details for implementing the invention

[0029] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0030] To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0031] Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings.

[0032] Furthermore, when a part such as a layer, membrane, region, or plate is said to be "on" or "on" 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. Also, saying that a part is "on" or "on" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "on" or "on" facing the opposite direction of gravity.

[0033] Furthermore, throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0034] Additionally, throughout the specification, "planar" means when the subject part is viewed from above, and "cross-sectional" means when the cross-section obtained by vertically cutting the subject part is viewed from the side.

[0035] FIG. 4 is a perspective view showing a battery module according to an embodiment of the present invention. FIG. 5 is an exploded perspective view of the battery module of FIG. 4. FIG. 6 is a perspective view showing a battery cell included in the battery module of FIG. 5. FIG. 7 is an enlarged view of part B of FIG. 5.

[0036] Referring to FIGS. 4 to 7, a battery module (100) according to one embodiment of the present invention comprises: a battery cell stack (120) in which a plurality of battery cells (110) are stacked; a module frame (200) that accommodates the battery cell stack (120) and includes a plurality of venting holes (210); end plates (410, 420) disposed on both sides of the battery cell stack (120); and an anti-inflammatory cover (700) that covers the plurality of venting holes (210).

[0037] First, referring to FIG. 6, the battery cell (110) is preferably a pouch-type battery cell. For example, the battery cell (110) according to the present embodiment has a structure in which two electrode leads (111, 112) face each other and protrude from one end (114a) and the other end (114b) of the cell body (113), respectively. More specifically, the electrode leads (111, 112) are connected to an electrode assembly (not shown) and protrude from the electrode assembly (not shown) to the outside of the battery cell (110).

[0038] Meanwhile, the battery cell (110) can be manufactured by bonding the two ends (114a, 114b) of the cell case (114) and the one side (114c) connecting them, while the electrode assembly (not shown) is housed in the cell case (114). In other words, the battery cell (110) according to the present embodiment has a total of three sealing parts (114sa, 114sb, 114sc), and the sealing parts (114sa, 114sb, 114sc) are sealed by a method such as heat fusion, and the other side can be formed as a connecting part (115). The cell case (114) can be made of a laminate sheet including a resin layer and a metal layer.

[0039] Additionally, the connecting portion (115) may extend along one edge of the battery cell (110), and a protruding portion (110p) of the battery cell (110), called a bat-ear, may be formed at the end of the connecting portion (115). Additionally, as the cell case (114) is sealed with the protruding electrode leads (111, 112) in between, a terrace portion (116) may be formed between the electrode leads (111, 112) and the cell body (113). That is, the battery cell (110) includes a terrace portion (116) that extends from the cell case (114) in the direction in which the electrode leads (111, 112) protrude.

[0040] A plurality of battery cells (110) may be configured, and a plurality of battery cells (110) may be stacked so as to be electrically connected to each other to form a battery cell stack (120). Referring to FIG. 5, battery cells (110) may be stacked along the y-axis direction to form a battery cell stack (120). A first busbar frame (310) may be located on one side of the battery cell stack (120) in the direction in which the electrode lead (111) protrudes (x-axis direction). Although not specifically illustrated, a second busbar frame may be located on the other side of the battery cell stack (120) in the direction in which the electrode lead (112) protrudes (-x-axis direction). The battery cell stack (120) and the first busbar frame (310) may be accommodated together in a module frame (200). The module frame (200) can protect the battery cell stack (120) housed inside the module frame (200) and the electrical components connected thereto from external physical impact. As shown in FIG. 5, the module frame (200) may be a module frame (200) in the form of a metal plate with an integrated top surface, bottom surface, and both sides. That is, in the case of a module frame (200) in the form of a square tube, a space is formed inside in which the battery cell stack (120) can be housed, and end plates (410, 420) are attached to both ends of the square tube shape. However, it is not limited thereto, and various types of module frames (200) may be applied. As a possible variation, a module frame (200) in the form where an upper cover and a U-shaped frame are combined, or a module frame (200) in the form where a lower plate and an inverse U-shaped frame are combined, is also possible and is not particularly limited.

[0041] A plurality of venting holes (210) may be formed on at least one surface of the module frame (200). For example, as shown in FIGS. 4 and 5, they may be formed on the upper surface of the module frame (200), that is, on the upper surface in the z-axis direction. By forming a plurality of venting holes (210), a path for discharging heat, gas, or flame generated within the battery module (100) can be provided. Accordingly, heat, gas, or flame generated inside the battery module (100) can be prevented from accumulating and exploding. The plurality of venting holes (210) may be formed uniformly over the entire upper surface of the module frame (200) at regular intervals, or they may be formed concentrated in one part to induce discharge in a certain direction.

[0042] Meanwhile, the module frame (200) may be opened in the direction in which the electrode leads (111, 112) protrude (x-axis direction, -x-axis direction), and end plates (410, 420) may be positioned on each of the open sides of the module frame (200). The two end plates (410, 420) shall be referred to as the first end plate (410) and the second end plate (420), respectively. The first end plate (410) may be joined to the module frame (200) while covering the first busbar frame (310), and the second end plate (420) may be joined to the module frame (200) while covering the second busbar frame (not shown). That is, a first busbar frame (310) may be positioned between the first end plate (410) and the battery cell stack (120), and a second busbar frame (not shown) may be positioned between the second end plate (420) and the battery cell stack (120). Additionally, an insulating cover (800, see FIG. 4) for electrical insulation may be positioned between the first end plate (410) and the first busbar frame (310).

[0043] The first end plate (410) and the second end plate (420) are positioned to cover the one side and the other side, respectively, of the battery cell stack (120). The first end plate (410) and the second end plate (420) can protect the first busbar frame (310) and various electrical components connected thereto from external impacts, and for this purpose, they must have a certain strength and may include a metal such as aluminum. Additionally, the first end plate (410) and the second end plate (420) can be joined to the corresponding corner of the module frame (200) by means such as welding. Furthermore, when the battery module (100) is mounted to the battery pack frame, etc., to form a battery pack, a first through hole (411) may be formed in the edge portion of the first end plate (410) and the second end plate (420) so that a connecting member for mounting can be inserted. However, the method of fixing to the battery pack is not limited to this, and the battery module can be mounted in various ways.

[0044] The first busbar frame (310) is positioned on one side of the battery cell stack (120) to cover the battery cell stack (120) and simultaneously guide the connection between the battery cell stack (120) and an external device. Specifically, at least one of a busbar, a terminal busbar, and a module connector may be mounted on the first busbar frame (310). In particular, at least one of a busbar, a terminal busbar, and a module connector may be mounted on the side opposite to the side of the first busbar frame (310) facing the battery cell stack. For example, FIG. 5 shows a busbar (510) and a terminal busbar (520) mounted on the first busbar frame (310).

[0045] The electrode lead (111) of the battery cell (110) can be bent and joined to the bus bar (510) or terminal bus bar (520) after passing through a slit formed in the first bus bar frame (310). The battery cells (110) constituting the battery cell stack (120) can be connected in series or in parallel by the bus bar (510) or terminal bus bar (520). Additionally, the battery cells (110) can be electrically connected to an external device or circuit through the terminal bus bar (520) exposed to the outside of the battery module (100).

[0046] The first busbar frame (310) may include an electrically insulating material. The first busbar frame (310) can prevent a short circuit by restricting the busbar (510) or terminal busbar (520) from contacting the battery cells (110), except for the portion where the busbar (510) or terminal busbar (520) is joined to the electrode lead (111).

[0047] Meanwhile, as described above, a second busbar frame may be positioned on the other side of the battery cell stack (120), and at least one of a busbar, a terminal busbar, and a module connector may be mounted on the second busbar frame. An electrode lead (112) may be bonded to such a busbar.

[0048] According to the present embodiment, an opening may be formed in the first end plate (410) to expose at least one of a terminal busbar and a module connector. The opening may be a connection opening or a module connector opening. For example, as shown in FIGS. 4 and 5, a connection opening (410H) may be formed in the first end plate (410) to expose a terminal busbar (520). The terminal busbar (520) further includes an upwardly protruding portion compared to the busbar (510), and this upwardly protruding portion may be exposed to the outside of the battery module (100) through the connection opening (410H). The terminal busbar (520) exposed through the connection opening (410H) may be connected to another battery module or a BDU (Battery Disconnect Unit) by an external busbar, etc., to form a High Voltage (HV) connection. Additionally, although not shown, a connection opening may also be formed in the second end plate (420), and through this connection opening, a module connector mounted on a terminal busbar or busbar frame may be connected to an external device.

[0049] Meanwhile, the end plates (410, 420) according to the present embodiment cover the front and rear surfaces of the battery cell stack (120), and the module frame (200) covers the upper surface, lower surface, and both sides of the battery cell stack (120). Here, the front surface refers to the surface in the x-axis direction of the battery cell stack (120), and the rear surface refers to the surface in the -x-axis direction of the battery cell stack (120). The upper surface refers to the surface in the z-axis direction of the battery cell stack (120), the lower surface refers to the surface in the -z-axis direction of the battery cell stack (120), and both sides refer to the surfaces in the y-axis and -y-axis directions of the battery cell stack (120), respectively. However, these surfaces are referred to for convenience of explanation and may vary depending on the location of the object being targeted or the location of the observer. As described above, the front and rear surfaces of the battery cell stack (120) may be surfaces where the protruding electrode leads (111, 112) of the battery cell (110) are located.

[0050] According to the present embodiment, the module frame (200) includes an anti-inflammatory cover (700) that covers the venting hole (210). In the present embodiment, the anti-inflammatory cover (700) is formed to cover the upper surface of the module frame (200).

[0051] The flame-retardant cover (700) may include a plurality of venting holes (210), that is, a flame-retardant portion (710) formed corresponding to the upper surface of the module frame (200), and a busbar cover portion (720) formed on the upper part of the end plate. These flame-retardant portions (710) and busbar cover portions (720) may be formed integrally by a press method or the like.

[0052] The flame-extinguishing section (710) may have a configuration in which a number of fine holes are formed so that high-temperature gas discharged through the venting hole (210) is quickly discharged to the outside, while preventing high-salt flames from being directly discharged. For example, as shown in FIG. 5, it may be formed to have a micro-perforated structure having a plurality of fine holes (711). That is, it may be a structure in which a plurality of fine holes (711) are formed in a metal sheet. This configuration acts as a kind of flame-extinguishing mesh screen to suppress the discharge of flames to the outside. In addition, since fine holes (710) having a fine size are formed rather than simple through holes, the heat transfer area of ​​the module frame (200) can be increased. That is, the gas discharge rate can be increased, and the rate of temperature rise inside the battery module (100) due to heat dissipation to the outside of the battery module (100) can be lowered.

[0053] In addition, in this embodiment, the flame extinguishing section (710) is not formed alone, but is formed in correspondence with the venting hole (210) formed in the module frame (200), so that blockage of the flame extinguishing section (710) by flying material, etc., generated during thermal runaway can be prevented, and the flame and heat discharge path is set in a complex manner, so that the intensity of the flame can be effectively blocked.

[0054] Meanwhile, the busbar cover portion (720), formed integrally with the anti-inflammatory portion (710), may be formed to cover the connection opening (410H) described above, in particular. That is, the first and second end plates (410, 420) have a connection opening (410H; in FIG. 4 and 5, only the connection opening formed in the first end plate is shown, but a connection opening in the same or similar manner may be formed in the second end plate on the opposite side) that can electrically connect the internal battery cell stack (110) and an external device, such as a terminal busbar (520), to the outside. The busbar cover portion (720) is formed to cover the connection opening (410H) in correspondence with the connection opening (410H). By doing so, the terminal busbar (520), etc. exposed through the connection opening (410H) can be covered and protected. In particular, when high-temperature heat, gas, and flames are generated in the battery module (100) or adjacent battery modules, flying debris may be generated together. However, with such a busbar cover (720), it is possible to provide complete protection for parts that are exposed to the outside of the end plates (410, 420) and are susceptible to damage, thereby preventing damage caused by heat and flying debris. Furthermore, in this embodiment, since the busbar cover (720) is not a separate part but is formed integrally with the flame-extinguishing part (710) in the flame-extinguishing cover (700), it is possible to prevent flames from being released to the outside through a simple structure, while effectively protecting the internal parts.

[0055] In addition, as described in FIG. 3, in the conventional structure, there was a problem in that high-temperature heat, gas, and flame could enter the interior of the battery module (10) through the opening formed in the end plate (40) of the adjacent battery module (10) and cause damage to the plurality of battery cells (11) and other electrical components. However, in this embodiment, the configuration of the busbar cover (720) not only protects the internal electrical components against heat, gas, and flame entering from the outside, but also prevents the transfer and spread to adjacent battery modules even if high-temperature heat, gas, and flame are generated in the battery module (100), thereby blocking additional heat transfer.

[0056] Additionally, the anti-inflammatory cover (700) may further include a second through hole (730, FIG. 7) located at a position corresponding to the first through hole (411) formed in the first and second end plates (410, 420). By doing so, the anti-inflammatory cover (700) can be simply fixed by a connecting member (not shown). However, the configuration for fixing the anti-inflammatory cover (700) is not limited to this and can be fixed by various methods.

[0057] Next, with reference to FIG. 8, an anti-inflammatory cover (700) according to a modified embodiment of the present invention will be described.

[0058] FIG. 8 is a perspective view showing an anti-inflammatory cover in a modified embodiment of the present invention.

[0059] In this embodiment, the anti-inflammatory cover (700) may have a mesh structure in the anti-inflammatory portion (710). That is, square-shaped micro-holes (712) may be formed, and the anti-inflammatory portion (710) is characterized by being formed as a mesh structure. However, this embodiment is not limited thereto, and various types of micro-holes may be formed.

[0060] Next, an anti-inflammatory cover (700) according to another embodiment of the present invention will be described with reference to FIGS. 9 and FIGS. 10.

[0061] FIG. 9 is an enlarged view of part B of FIG. 5 in another modified embodiment of the present invention. FIG. 10 is a view of FIG. 9 with the outer busbar cover covered.

[0062] As illustrated in FIGS. 9 and 10, in this embodiment, a stepped portion (721) is provided on the busbar cover portion (720) to which an external busbar (900) can be mounted, and an external busbar cover (740) covering the external busbar (900) disposed on the stepped portion (721) may be further included. The external busbar cover (740) may be rotatably coupled to the busbar cover portion (720) by means of a hinge portion (741). However, it is not limited thereto, and it is also possible for the external busbar cover (740) to be integrally formed with the busbar cover portion (720).

[0063] The outer busbar cover (740) covers the outer busbar (900) as shown in FIG. 10. By doing so, protection of the mounted outer busbar (900) is possible, thereby preventing damage caused by high-temperature gas, flame, heat, and flying debris generated from the battery module (100) or an adjacent battery module.

[0064] In this embodiment, terms indicating directions such as front, back, left, right, up, and down have been used; however, these terms are for convenience of explanation only and may vary depending on the location of the object or the observer.

[0065] One or more battery modules according to the embodiment described above can be mounted together with various control and protection systems, such as a Battery Management System (BMS), a Battery Disconnect Unit (BDU), and a cooling system, to form a battery pack.

[0066] The above-mentioned battery module or battery pack can be applied to various devices. Specifically, it can be applied to means of transportation such as electric bicycles, electric vehicles, and hybrids, but is not limited thereto and can be applied to various devices capable of using secondary batteries.

[0067] Although 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 by those skilled in the art using the basic concept of the present invention as defined in the following claims also fall within the scope of the present invention. Explanation of the symbols

[0068] 100: Battery module 200: Module Frame 700: Anti-inflammatory cover 710: Anti-inflammatory part 720: Busbar cover

Claims

Claim 1 A battery module comprising: a battery cell stack having a plurality of stacked battery cells; a module frame that accommodates the battery cell stack while covering the lower surface, upper surface, and side surface of the battery cell stack and includes a plurality of venting holes on the upper surface; end plates disposed on both sides of the battery cell stack not covered by the module frame; and a fire-extinguishing cover covering the upper surface of the module frame including the plurality of venting holes and the upper surface of the end plate, wherein the fire-extinguishing cover includes a fire-extinguishing portion corresponding to the plurality of venting holes and a busbar cover portion corresponding to the upper surface of the end plate. Claim 2 delete Claim 3 In claim 1, the anti-inflammatory part is a battery module including a micro-perforated structure. Claim 4 In claim 1, the above-mentioned anti-inflammatory part is a battery module including a mesh structure. Claim 5 A battery module according to claim 1, further comprising a terminal busbar connecting the battery cell stack and an external device, wherein the end plate comprises a connection opening that exposes the terminal busbar, and the busbar cover portion covers the connection opening. Claim 6 In paragraph 5, the busbar cover portion comprises a step portion for connecting an external busbar at a position corresponding to the terminal busbar, in a battery module. Claim 7 In claim 6, the battery module further comprises an outer busbar cover formed to cover the outer busbar corresponding to the stepped portion. Claim 8 In claim 7, the external busbar cover is a battery module rotatably coupled to the busbar cover portion by a hinge portion. Claim 9 A battery module according to claim 1, wherein the end plate further includes a first through hole into which a connecting member for mounting the battery module to a battery pack is inserted, and the flame-retardant cover further includes a second through hole corresponding to the first through hole. Claim 10 A battery pack including a battery module according to paragraph 1.

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