Battery module, battery pack and vehicle including same

Abstract

A battery module according to an embodiment of the present invention includes: a plurality of battery cells: a module terminal configured to be electrically connected to the plurality of battery cells; a module frame which accommodates the plurality of battery cells and has a first venting hole formed in a first plate thereof and the module terminal formed in a second plate thereof; and a frame cover including a first cover configured to cover at least the first plate and a second cover configured to be connected to the first cover and cover at least the second plate.

Description

Battery modules, battery packs containing the same, and vehicles

[0001] The present invention relates to a battery module, a battery pack including the same, and a vehicle.

[0002] This application claims priority to Korean Patent Application No. 10-2024-0021936, filed on February 15, 2024, and all contents disclosed in the specification and drawings of the said application are incorporated herein by reference.

[0003] Secondary batteries, which boast high electrical properties such as high energy density and easy applicability across a wide range of product categories, are widely used not only in portable devices but also in electric vehicles (EVs) and hybrid electric vehicles (HEVs) powered by electrical power sources. These batteries are attracting attention as a new energy source for environmental friendliness and energy efficiency, not only because they can dramatically reduce fossil fuel use, but also because they produce no byproducts from energy use.

[0004] Commonly used secondary batteries today include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. When high output voltage is required, multiple battery cells are connected in series to form a battery module or battery pack. Furthermore, to increase charge / discharge capacity, multiple battery cells are connected in parallel to form a battery module or pack. Therefore, the number of battery cells included in a battery module or pack can vary depending on the required output voltage or charge / discharge capacity.

[0005] Meanwhile, since battery cells undergo chemical reactions during charging and discharging, their performance can deteriorate if used in environments above optimal temperatures. Furthermore, if thermal control fails to maintain optimal temperatures, there is a constant risk of unexpected fire or explosion. Furthermore, battery modules are structured to house these cells tightly within the module frame. Therefore, if a thermal event occurs in a single battery cell, the resulting high-temperature gases and flames can spread to adjacent cells, potentially triggering a chain reaction of battery cell explosions, making them extremely dangerous.

[0006] In particular, the module frame of the battery module is made of a metal material, so when a thermal event occurs inside the battery module or in an adjacent battery module, it can act as a heat source and promote heat transfer between battery modules.

[0007] Accordingly, conventional battery modules have a frame cover configured to cover the outer side of the module frame, particularly the upper surface, so that when thermal runaway occurs in the battery module, high-temperature gas or flame generated inside the battery module is minimized from flowing to other battery modules, thereby preventing heat transmission between battery modules and preventing the discharged gas or flame from flowing back into the battery module.

[0008] These frame covers are made of sheets of FRB, silicon, and mica, and are adhesively attached to the module frame. However, when a thermal runaway occurs in the battery module, problems such as deformation due to high-temperature gases or flames, etc., and lifting from the module frame occur. As a result, there is a problem in which high-temperature gases or flames are discharged to other battery modules and re-enter the battery module where the thermal runaway occurred.

[0009] Therefore, there is a need to develop a structure that can protect the module frame and prevent thermal runaway propagation between battery modules when thermal runaway occurs in the battery module.

[0010] Accordingly, the problem to be solved by the present invention is to provide a battery module that can effectively prevent or delay the propagation of thermal runaway between modules by minimizing the high-temperature gas or flames generated from a battery cell in an abnormal situation of the battery module from reaching other adjacent battery modules.

[0011] However, the problems to be solved by the present invention are not limited to the problems described above, and other problems not mentioned can be clearly understood by those skilled in the art from the description of the invention described below.

[0012] To solve the above problem, the present invention comprises: a plurality of battery cells; a module terminal configured to be electrically connected to the plurality of battery cells; a module frame that accommodates the plurality of battery cells, the first venting hole being formed in a first plate and the module terminal being provided in a second plate; and a frame cover that includes a first cover configured to cover at least the first plate and a second cover connected to the first cover and configured to cover at least the second plate.

[0013] The above first cover may be configured to further cover at least one of the third plates of the module frame provided on both left and right ends of the above first plate.

[0014] The second cover may be configured to further cover a fourth plate of the module frame provided opposite the second plate.

[0015] The second plate and the fourth plate of the module frame may be positioned on the side from which the electrode leads of the battery cell are drawn out.

[0016] The first plate may be defined as the upper surface of the module frame, and the second plate may be defined as the front surface of the module frame.

[0017] The above frame cover may be configured to be secured to the module frame.

[0018] The above frame cover may have a folded portion configured such that the end portion is folded inward to at least partially cover the lower surface of the module frame.

[0019] The above-mentioned bending portions may be provided in at least one pair and configured to face each other.

[0020] The above frame cover may have a guide portion configured to guide a position of connection with the module frame.

[0021] The above frame cover may be formed with a second venting hole formed at a position corresponding to the first venting hole.

[0022] The second venting hole may be formed in the first cover.

[0023] The above frame cover covers the second venting hole and may include a cover member configured to be openable by the venting gas.

[0024] In addition, the present invention provides a battery pack characterized by including a battery module according to the present invention.

[0025] And, the present invention provides an automobile characterized by including a battery module according to the present invention.

[0026] According to one aspect of the present invention, since the frame cover is made of a rigid, heat-resistant material, deformation caused by high-temperature gases or flames can be minimized. This protects the module frame and prevents heat transfer between battery modules.

[0027] Furthermore, according to another aspect of the present invention, when a battery module experiences an abnormal condition, high-temperature gases or flames generated from a battery cell can be minimized from reaching adjacent battery modules, effectively preventing or delaying the spread of thermal runaway between modules. This ensures the safety and reliability of the battery module.

[0028] In addition, according to another aspect of the present invention, separation of the frame cover from the module frame can be minimized as the bonding force or fixing force between the frame cover and the module frame is secured.

[0029] In addition, according to another aspect of the present invention, workability and productivity in manufacturing a battery module can be improved as the joint structure between the frame cover and the module frame is simplified.

[0030] Furthermore, according to another aspect of the present invention, high-temperature gases or flames generated from battery cells in the event of an abnormal condition in the battery module can be prevented from re-entering the battery module. This ensures the safety and reliability of the battery module.

[0031] In addition, according to another aspect of the present invention, an event due to thermal runaway phenomenon, such as a fire or explosion, of a battery pack including a plurality of battery modules or a device equipped with the same can be prevented or delayed.

[0032] In addition, the present invention may have various other effects, which will be described in each embodiment configuration, or an explanation of effects that can be easily inferred by a person skilled in the art will be omitted.

[0033] The following drawings attached to this specification illustrate preferred embodiments of the present invention, and together with the detailed description of the invention described below, serve to further understand the technical idea of ​​the present invention, and therefore, the present invention should not be interpreted as being limited to matters described in such drawings.

[0034] FIG. 1 is a schematic perspective view of a battery module according to one embodiment of the present invention.

[0035] FIG. 2 is a schematic perspective view of a module frame of a battery module according to one embodiment of the present invention.

[0036] Figure 3 is an exploded perspective view of a battery module according to one embodiment of the present invention.

[0037] Fig. 4 is a cross-sectional view of a battery module according to one embodiment of the present invention. For example, Fig. 4 may be a drawing showing the cross-sectional view taken along line I-I' of Fig. 1.

[0038] Fig. 5 is a cross-sectional view of a battery module according to one embodiment of the present invention. For example, Fig. 5 may be a drawing showing the cross-sectional view taken along line II-II' of Fig. 1.

[0039] FIG. 6 is a drawing for explaining how a frame cover is coupled to a battery module according to one embodiment of the present invention.

[0040] FIG. 7 is a cross-sectional perspective view of a frame cover applied to a battery module according to one embodiment of the present invention.

[0041] FIG. 8 is a cross-sectional perspective view of a frame cover applied to a battery module according to one embodiment of the present invention.

[0042] FIG. 9 is an enlarged view of a portion of a battery module according to one embodiment of the present invention, and is a drawing for explaining a guide portion provided on a frame cover.

[0043] Figure 10 is an exploded perspective view of a guide portion provided in a frame cover according to one embodiment of the present invention.

[0044] FIG. 11 is a drawing for explaining a cover member of a frame cover applied to a battery module according to one embodiment of the present invention.

[0045] FIG. 12 is a drawing showing a part of a cover member of a frame cover applied to a battery module according to one embodiment of the present invention being opened.

[0046] FIG. 13 is a schematic perspective view of a battery pack including a battery module according to one embodiment of the present invention.

[0047] FIG. 14 is a schematic perspective view of a vehicle including a battery pack according to one embodiment of the present invention.

[0048] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention, they should be interpreted in a way that aligns with the technical spirit of the present invention.

[0049] Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0050] Furthermore, the present invention includes various embodiments. For each embodiment, redundant descriptions of substantially identical or similar components will be omitted, and the differences will be described.

[0051] Meanwhile, in the present invention, terms indicating directions such as up, down, left, right, front, and back may be used, but it is obvious to those skilled in the art that these terms are only for convenience of explanation and may vary depending on the location of the target object or the location of the observer.

[0052] For example, in an embodiment of the present invention, the X-axis direction shown in the drawing may mean a left-right direction, the Y-axis direction may mean a front-back direction perpendicular to the X-axis direction on a horizontal plane (XY plane), and the Z-axis direction may mean an up-down direction (vertical direction) perpendicular to both the X-axis direction and the Y-axis direction.

[0053]

[0054] FIG. 1 is a schematic perspective view of a battery module according to an embodiment of the present invention, FIG. 2 is a schematic perspective view of a module frame of a battery module according to an embodiment of the present invention, and FIG. 3 is an exploded perspective view of a battery module according to an embodiment of the present invention. In addition, FIG. 4 is a cross-sectional view of a battery module according to an embodiment of the present invention. For example, FIG. 4 may be a drawing showing a cross-sectional view taken along line I-I' of FIG. 1. And, FIG. 5 is a cross-sectional view of a battery module according to an embodiment of the present invention. For example, FIG. 5 may be a drawing showing a cross-sectional view taken along line II-II' of FIG. 1.

[0055] Referring to FIGS. 1 to 5, a battery module (10) according to one embodiment of the present invention may include a battery cell (100), a module terminal (200), a module frame (300), and a frame cover (400).

[0056] Referring primarily to FIG. 2, a plurality of battery cells (100) may be included. In this case, the plurality of battery cells (100) may be electrically connected to each other.

[0057] A plurality of battery cells (100) may be stacked along one direction. For example, as illustrated in FIG. 3, a plurality of battery cells (100) may be arranged in a vertical direction (Z-axis direction) and in a parallel manner in the left-right direction (X-axis direction).

[0058] And, the plurality of battery cells (100) may be, for example, pouch-type secondary batteries. The plurality of battery cells (100) may include an electrode assembly, a cell case that accommodates the electrode assembly, and an electrode lead (110) that is connected to the electrode assembly and extends outward from the cell case to function as an electrode terminal.

[0059] The electrode leads (110) may be provided as a pair, and the pair of electrode leads (110) may be drawn out from both ends of the battery cell (100), i.e., in the longitudinal direction (±Y direction). At this time, the pair of electrode leads (110) may be a positive lead and a negative lead.

[0060] The present invention is not limited by the specific type or shape of the battery cell (100), and various battery cells (100) known at the time of filing of the present invention may be employed to configure a plurality of battery cells (100) of the present invention. In the present embodiment, a pouch-type secondary battery having a high energy density and easy stacking is targeted as shown in the drawing, but it is of course possible for a cylindrical or square secondary battery to be applied as the battery cell (100).

[0061] Meanwhile, referring to FIGS. 2 and 3, the module frame (300) may be configured to accommodate a battery cell (100). Specifically, an internal space may be formed in the module frame (300), and the internal space may be configured to accommodate a battery cell (100).

[0062] Such a module frame (300) may be made of a metal material having rigidity and heat resistance to physically or chemically protect the received battery cell (100).

[0063] Meanwhile, a first venting hole (H1) may be formed in the module frame (300). The first venting hole (H1) may be configured to discharge venting gas generated in the battery cell (100) to the outside of the module frame (300). Directional venting in one direction may be possible by the first venting hole (H1).

[0064] The first venting hole (H1) may be formed in the first plate (300a) of the module frame (300). For example, as illustrated in FIGS. 1 to 5, the first plate (300a) may be defined as the upper surface of the module frame (300), and directional venting of the battery module (10) upward may be possible through the first venting hole (H1) formed in the upper surface of the module frame (300).

[0065] The first venting hole (H1) may be provided in multiple numbers, and may be provided at regular intervals between each other in the horizontal direction (X-axis, Y-axis direction).

[0066] According to the above-described embodiment of the present invention, in a situation where one of the battery cells (100) undergoes thermal runaway and gas or the like is generated, the gas or the like can be quickly directional vented in a specific direction.

[0067] Additionally, the module frame (300) may be provided with a module terminal (200). The module terminal (200) may be configured to be electrically connected to a plurality of battery cells (100). The module terminal (200) may include a positive terminal and a negative terminal. Additionally, the module terminal (200) may be configured to be electrically or communicatively connected to a control device such as a BMS. The module terminal (200) may be configured to be at least partially extended to the outside of the module frame (300).

[0068] The module terminal (200) may be provided on the side from which the electrode lead (110) of the battery cell (100) is drawn out. In particular, the module terminal (200) may be provided on the second plate (300b) of the module frame (300). For example, as illustrated in FIGS. 1 to 5, the second plate (300b) may be defined as the front surface of the module frame (300), and the module terminal (200) may be provided on the front of the module frame (300).

[0069] Meanwhile, referring mainly to FIGS. 3 and 4, the frame cover (400) may be configured to cover at least a portion of the module frame (300). The frame cover (400) may be provided on the outside of the module frame (300). The frame cover (400) may be configured to suppress venting gas or flames, etc., emitted when a thermal event occurs within a battery module (10) from being transferred to another battery module (10).

[0070] The frame cover (400) may be made of a material with excellent heat resistance and / or fire resistance, such as a mica sheet or a silicone composite material. For example, the frame cover (400) may be made of an inflexible material by heat-molding a mica sheet.

[0071] Accordingly, the frame cover (400) can maintain morphological stability without deformation even when high temperature heat is generated, and thus can stably block high temperature gases or flames generated from the battery cell (100).

[0072] According to the above-described embodiment of the present invention, since the frame cover (400) is made of a hard and heat-resistant material, deformation due to high-temperature gas or flames can be minimized.

[0073] More specifically, the frame cover (400) may include a first cover (410) and a second cover (420). The first cover (410) may be configured to cover at least the first plate (300a) of the module frame (300). The first cover (410) may be configured to protect the first venting hole (H1). For example, the first cover (410) may be configured to prevent venting gas or flames discharged from another battery module (10) from flowing into the interior of the module frame (300) through the first venting hole (H1).

[0074] Meanwhile, the second cover (420) may be configured to cover at least the second plate (300b) of the module frame (300). As described above, the second plate (300b) may be provided with a module terminal (200), and the second cover (420) may be configured to protect the module terminal (200). In other words, the second cover (420) may be configured to suppress venting gases or flames, etc., emitted from other battery modules (10) from reaching the module terminal (200).

[0075] This second cover (420) may be provided connected to the first cover (410). For example, the second cover (420) may be injection-molded and folded integrally with the first cover (410), or may be manufactured separately from the first cover (410) and then combined.

[0076] According to the above-described embodiment of the present invention, the first cover (410) and the second cover (420) are configured to protect the first venting hole (H1) and the module terminal (200), respectively, so that in the event of an abnormality in an adjacent battery module (10), high-temperature venting gas or flames, etc., can be minimized from being directed toward the first venting hole (H1) or the module terminal (200) of the battery module (10). In particular, since the frame cover (400) covers the module frame (300) from multiple directions, heat can be effectively suppressed from being transferred to the outside of the module frame (300) or to the module frame (300). Thus, according to the above-described embodiment of the present invention, thermal runaway propagation between battery modules (10) can be effectively prevented or delayed, so that the safety and reliability of the battery module (10) can be guaranteed.

[0077]

[0078] Meanwhile, referring to FIG. 2, the module frame (300) according to one embodiment of the present invention may further include a third plate (300c), a fourth plate (300d), and a fifth plate (300e). The first plate (300a) to the fifth plate (300e) may form the exterior of the module frame (300). The module frame (300) may be formed into a rectangular parallelepiped shape by the first plate (300a) to the fifth plate (300e).

[0079] More specifically, the third plate (300c) may be provided on both left and right ends of the first plate (300a). That is, the third plates (300c) may be provided so as to face each other as a pair. For example, as in the embodiment illustrated in the drawing, the first plate (300a) may form the upper surface of the module frame (300), and the third plates (300c) may be configured to form the left and right sides of the module frame (300) on both sides of the first plate (300a).

[0080] Additionally, the fifth plate (300e) may be configured to face the first plate (300a). For example, as in the embodiment illustrated in the drawing, the first plate (300a) may form the upper surface of the module frame (300), and the fifth plate (300e) may be configured to form the lower surface of the module frame (300).

[0081] At this time, the first plate (300a), the third plate (300c), and the fifth plate (300e) may be configured in an integrated form. At this time, the combined form of the first plate (300a), the third plate (300c), and the fifth plate (300e) may be a square tubular shape with open front and back surfaces. Alternatively, the third plate (300c) and the fifth plate (300e) may be configured in an integrated form.

[0082] The first cover (410) may be configured to further cover at least one of the third plates (300c) of the module frame (300) provided on both left and right ends of the first plate (300a). That is, the first cover (410) may be configured to further cover at least one third plate (300c) together with the first plate (300a). For example, as in the embodiments illustrated in FIGS. 3 and 5, the first cover (410) may be configured to cover the first plate (300a) provided on the upper side and the third plates (300c) provided on the left and right sides.

[0083] The first cover (410) may be configured to be folded at the boundary between the first plate (300a) and the third plate (300c) so as to cover the first plate (300a) and the third plate (300c) at once. That is, the first cover (410) may be provided in the form of a single sheet folded.

[0084] According to the above-described embodiment of the present invention, the first cover (410) covers not only the first plate (300a) having the first venting hole (H1) but also both sides of the first plate (300a), thereby preventing a thermal event occurring inside the module frame (300) and venting gas or flame from being discharged toward the third plate (300c). At the same time, the frame cover (400) can block venting gas or flame from being directed from the outside toward the third plate (300c).

[0085] Meanwhile, the fourth plate (300d) may be provided on the opposite side of the second plate (300b). That is, the second plate (300b) and the fourth plate (300d) may be configured to face each other. The second plate (300b) and the fourth plate (300d) of the module frame (300) may be positioned on the side from which the electrode lead (110) of the battery cell (100) is drawn out. That is, the second plate (300b) and the fourth plate (300d) may be positioned on the side on which the busbar frame assembly (500) is provided.

[0086] For example, as in the embodiment illustrated in the drawing, the second plate (300b) may be configured to form the front surface of the module frame (300), and the fourth plate (300d) may be configured to form the rear surface of the module frame (300). The second plate (300b) and the fourth plate (300d) may be coupled to the open front and rear surfaces of the integrated first plate (300a), third plate (300c), and fifth plate (300e).

[0087] Meanwhile, referring to FIG. 3, the battery module (10) of the present invention may further include a busbar frame assembly (500). The busbar frame assembly (500) may be provided inside the module frame (300) and configured to cover at least one side of the plurality of battery cells (100). The busbar frame assembly (500) may be positioned on the side from which the electrode leads (110) of the battery cells (100) are drawn out. In the present embodiment, as illustrated in FIG. 2, the busbar frame assembly (500) may be coupled to the front and rear of the plurality of battery cells (100).

[0088] A busbar frame assembly (500) may include a busbar frame (510) and a plurality of busbars (520). The busbar frame (510) may be arranged to be connected to the front and rear of a plurality of battery cells (100). The busbar frame (510) may have slits through which electrode leads of the battery cells (100) can be drawn out in the front-back direction.

[0089] Additionally, the busbar frame (510) may be formed of a material having electrical insulation properties, such as a plastic material, and may be configured to allow a busbar (520) to be attached to the outer surface.

[0090] Meanwhile, a plurality of bus bars (520) may be made of a metal material such as copper, aluminum, nickel, etc., and may be provided in the shape of a bar as a means for connecting battery cells (100) in series and / or in parallel.

[0091] The electrode leads of the battery cells (100) pass through the slits of the busbar frame (510) and are drawn outward from the busbar frame (510), and the portion drawn out in this manner can be attached to the surface of the busbar (520) by welding or the like.

[0092] As the busbar frame assembly (500) is provided, the second plate (300b) and the fourth plate (300d) may be formed of, for example, an insulating material on the inside and a metal material on the outside to ensure electrical insulation. In addition, at least one of the second plate (300b) and the fourth plate (300d) may be partially provided with holes or slits to expose components that require external exposure, such as a module terminal (200) or connector of a battery module (10).

[0093] At this time, the second cover (420) may be configured to further cover the fourth plate (300d) of the module frame (300) provided on the opposite side of the second plate (300b). That is, the second cover (420) may be configured to further cover the fourth plate (300d) together with the second plate (300b). For example, as in the embodiments illustrated in FIGS. 3 and 5, the second cover (420) may be configured to cover the second plate (300b) provided on the front surface and the fourth plate (300d) provided on the rear surface. The second covers (420) may be provided in two pieces and configured to face each other.

[0094] According to the above-described embodiment of the present invention, the second cover (420) covers not only the second plate (300b) provided with the module terminal (200) but also the fourth plate (300d), thereby preventing a thermal event occurring inside the module frame (300) and venting gas or flame from being discharged toward the fourth plate (300d). At the same time, the frame cover (400) can block venting gas or flame from being directed from the outside toward the fourth plate (300d). In particular, the frame cover (400) covers the second plate (300b) and the fourth plate (300d) provided on the side where the electrode lead (110) of the battery cell (100) is located, thereby preventing the electrode lead (110) or the bus bar (520) from being damaged by the venting gas or flame.

[0095]

[0096] FIG. 6 is a drawing for explaining how a frame cover is coupled to a battery module according to one embodiment of the present invention, FIG. 7 is a cross-sectional perspective view of a frame cover applied to a battery module according to one embodiment of the present invention, and FIG. 8 is a longitudinal cross-sectional perspective view of a frame cover applied to a battery module according to one embodiment of the present invention.

[0097] Referring to FIGS. 6 to 8, the first plate (300a) may be defined as the upper surface of the module frame (300), and the second plate (300b) may be defined as the front surface of the module frame (300). Accordingly, the first cover (410) and the second cover (420) may be configured to cover the upper surface and the front surface of the module frame (300), respectively.

[0098] In addition, the first cover (410) and the second cover (420) may be arranged along directions perpendicular to each other. For example, the first cover (410) may be configured to cover the upper surface and the left and right sides of the module frame (300) along the left-right direction, and the second cover (420) may be configured to cover the front and back sides of the module frame (300) along the front-back direction. At this time, the second cover (420) may be provided to be coupled to the front and rear sides of the first cover (410). Alternatively, the first cover (410) and the second cover (420) may be manufactured as one piece and provided to be foldable.

[0099] The frame cover (400) may be configured to be mounted on the module frame (300). That is, the frame cover (400) may be configured to be covered from the upper portion of the module frame (300) to cover at least a portion of the module frame (300). As in the embodiment illustrated in FIG. 6, when the frame cover (400) is configured to cover all surfaces of the module frame (300) except for the fifth plate (300e), the first cover (410) and the second cover (420) may be covered on the module frame (300) with their respective ends spread out to both sides (see arrows in FIG. 6).

[0100] When the frame cover (400) is mounted on the module frame (300), the frame cover (400) may be configured to be in close contact with the module frame (300). More specifically, the frame cover (400) may be configured to be fixed to the module frame (300). For example, as in the embodiments illustrated in FIGS. 6 to 8, the frame cover (400) may have a bent portion (411, 421). The bent portion (411, 421) may be configured such that the distal end of the frame cover (400) is bent inward. The bent portion (411, 421) may be configured to at least partially cover the lower surface of the module frame (300), i.e., the fifth plate (300e). That is, when the frame cover (400) is fixed to the module frame (300), the bent portion (411, 421) of the frame cover (400) can be configured to be fixed by being hung on the lower surface of the module frame (300).

[0101] The bending portions (411, 421) may be provided as at least one pair. The pair of bending portions (411, 421) may be configured to face each other. For example, as in the embodiment illustrated in FIGS. 7 and 8, the first cover (410) may be provided with the first bending portions (411) on the left and right sides, and the second cover (420) may also be provided with the second bending portion (421). The first bending portions (411) and the second bending portions (421) may each be provided as a pair and may be arranged to be perpendicular to each other. Accordingly, the first bending portions (411) and the second bending portions (421) may fix the module frame (300) in the front-rear, left-right, and right directions.

[0102] Furthermore, a thermally conductive adhesive such as TIM or thermal resin may be applied to the bottom surface of the module frame (300). As a result, the frame cover (400) can be further prevented from being separated from the module frame (300) by fixing the bending portions (411, 421) by the thermally conductive adhesive.

[0103] According to the above-described embodiment of the present invention, since the bonding or fixing force between the frame cover (400) and the module frame (300) is secured, the separation of the frame cover (400) from the module frame (300) can be minimized. In addition, according to the above-described embodiment of the present invention, since the fixing structure between the frame cover (400) and the module frame (300) is simplified, the workability or productivity in manufacturing the battery module (10) can be improved. In particular, since a separate adhesive is unnecessary, when thermal runaway of the battery module (10) occurs, the problem of the frame cover (400) being lifted from the module frame (300) by high-temperature venting gas or flame can be fundamentally prevented.

[0104]

[0105] FIG. 9 is an enlarged view of a portion of a battery module according to one embodiment of the present invention, and is a drawing for explaining a guide part provided on a frame cover. In addition, FIG. 10 is an exploded perspective view of a guide part provided on a frame cover according to one embodiment of the present invention.

[0106] Meanwhile, referring to FIGS. 9 and 10, the frame cover (400) may be provided with a guide portion (430). The guide portion (430) may be configured to guide a position of coupling with the module frame (300). In addition, the guide portion (430) may be configured to fix the module frame (300) and the frame cover (400) to each other.

[0107] More specifically, referring to FIG. 10, the guide portion (430) may be provided with a guide hole (431) and a guide pin (432). A plurality of guide holes (431) and guide pins (432) may be provided. The guide hole (431) may be formed in the frame cover (400). A fixing hole (310) may be formed in the module frame (300) at a position corresponding to the guide hole (431). For example, the fixing hole (310) may be provided in the second plate (300b). The fixing hole (310) may be provided on the inner side of the module terminal (200).

[0108] The guide pin (432), the guide hole (431), and the fixing hole (310) may be arranged in a vertical direction in parallel. The guide pin (432) may be provided in a pin shape. The guide pin (432) may be configured to penetrate the guide hole (431). The guide pin (432) may be configured to be inserted into the fixing hole (310) through the guide hole (431).

[0109] According to the above-described embodiment of the present invention, the position of the frame cover (400) when being coupled to the module frame (300) can be guided more simply. This can improve workability and productivity in manufacturing the battery module (10). In addition, the frame cover (400) can be more firmly fixed to the module frame (300), thereby preventing the frame cover (400) from being separated from the module frame (300). This prevents the frame cover (400) from being lifted off the module frame (300), thereby more reliably protecting the module frame (300) from venting gases or flames.

[0110]

[0111] FIG. 11 is a drawing for explaining a cover member of a frame cover applied to a battery module according to one embodiment of the present invention, and FIG. 12 is a drawing showing a part of the cover member of a frame cover applied to a battery module according to one embodiment of the present invention being opened.

[0112] Referring to FIGS. 11 and 12, a second venting hole (H2) may be formed in the frame cover (400). The second venting hole (H2) may be configured to discharge the venting gas discharged through the first venting hole (H1) to the outside of the battery module (10).

[0113] The second venting holes (H2) may be provided in multiple numbers, and may be provided at regular intervals in the horizontal direction (X-axis, Y-axis direction). In particular, the second venting holes (H2) may be formed at a position corresponding to the first venting holes (H1). The second venting holes (H2) may be formed in the first cover (410). Thus, according to the above-described embodiment of the present invention, venting gas or flames can be quickly directional vented in a specific direction through the first venting holes (H1) and the second venting holes (H2).

[0114] Meanwhile, the frame cover (400) may include a cover member (440). The cover member (440) may be configured to cover the second venting hole (H2). The cover member (440) may be provided on the inner side of the second venting hole (H2). That is, the cover member (440) may be provided between the first venting hole (H1) and the second venting hole (H2).

[0115] The cover member (440) may be configured in a sheet shape and may be mounted on the first plate (300a). At this time, the cover member (440) may be configured to cover a plurality of second venting holes (H2) at once. Alternatively, the cover member (440) may be configured to individually cover the second venting holes (H2). The cover member (440) may be attached to the inside of the first cover (410) or may be attached to the first plate (300a) of the module frame (300).

[0116] Such a cover member (440) may be configured such that at least a portion thereof can be opened by venting gas or flame, as in the embodiment illustrated in FIG. 12. Specifically, at least a portion of the cover member (440) may be configured to be ruptured by the pressure or heat of the venting gas directed toward the first venting hole (H1). For example, the cover member (440) may have a notch or cut line at a portion corresponding to the first venting hole (H1).

[0117] According to the above-described embodiment of the present invention, when a thermal event occurs in a specific battery cell (100), the cover member (440) provided on one side of the specific battery cell (100) may be ruptured, thereby opening at least one of the plurality of first venting holes (H1). Accordingly, venting gas or the like may be discharged to the outside of the module frame (300) through the opened first venting hole (H1).

[0118] In addition, the cover member (440) can prevent gases or flames discharged to the outside of the module frame (300) from flowing back into the inside of the battery module (10). That is, the first venting hole (H1) provided on the side of the battery cell (100) where no thermal event has occurred can be maintained in a closed state without being opened. To this end, the cover member (440) can be made of a material with excellent flame retardant performance. For example, the cover member (440) can include a material such as silicone or FRB.

[0119] In this way, the venting gas or flames, etc., discharged to the outside through the open first venting hole (H1), can be fundamentally blocked from flowing back into the battery module (10). In addition, the cover member (440) of the remaining portion without rupture can block not only heat but also high-temperature gases, flames, discharged substances, etc., generated from the battery cell (100).

[0120] According to the above-described embodiment of the present invention, when thermal runaway occurs in the battery module (10), not only can venting gas or flames generated inside the battery module (10) be smoothly discharged to the outside of the battery module (10), but also the discharged venting gas or flames can be prevented from flowing back into the battery module (10). Accordingly, by minimizing heat propagation to neighboring battery cells (100) or battery modules (10), thermal runaway propagation can be effectively prevented or delayed.

[0121]

[0122] FIG. 13 is a schematic perspective view of a battery pack including a battery module according to one embodiment of the present invention.

[0123] Referring to FIG. 13, a battery pack (1) according to one embodiment of the present invention may include one or more battery modules (10) according to one embodiment of the present invention as described above. The battery pack (1) according to the present invention may further include a pack case (2) for accommodating a BMS (Battery Management System), a current sensor, a fuse, and the like for integrated control of charging and discharging of one or more battery modules, and the above-described components.

[0124]

[0125] FIG. 14 is a schematic perspective view of a vehicle including a battery pack according to one embodiment of the present invention.

[0126] Referring to FIG. 14, a vehicle (3) according to an embodiment of the present invention may include one or more battery packs (1) according to an embodiment of the present invention or battery modules (10) according to an embodiment of the present invention. The vehicle (3) according to the present invention 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. The vehicle (3) operates by receiving power from the battery packs (1) and / or battery modules (10) according to an embodiment of the present invention.

[0127]

[0128] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical idea of ​​the present invention and the equivalent scope of the claims to be described below by a person having ordinary skill in the art to which the present invention pertains.

Claims

1. Multiple battery cells; A module terminal configured to be electrically connected to the plurality of battery cells; A module frame that accommodates the plurality of battery cells, has a first venting hole formed in a first plate, and has the module terminal provided in a second plate; and A battery module characterized by comprising a frame cover having a first cover configured to cover at least the first plate and a second cover connected to the first cover and configured to cover at least the second plate.

2. In paragraph 1, A battery module characterized in that the first cover is configured to further cover at least one of the third plates of the module frame provided on both left and right ends of the first plate.

3. In paragraph 1, A battery module characterized in that the second cover is configured to further cover the fourth plate of the module frame provided opposite the second plate.

4. In paragraph 3, A battery module, characterized in that the second plate and the fourth plate of the module frame are positioned on the side from which the electrode leads of the battery cell are drawn out.

5. In paragraph 1, The above first plate is the upper surface of the module frame, A battery module, characterized in that the second plate is defined as the front surface of the module frame.

6. In paragraph 1, A battery module characterized in that the frame cover is configured to be mounted on the module frame.

7. In paragraph 1, The above frame cover A battery module characterized in that it has a bending portion configured such that the terminal portion is bent inward to at least partially cover the lower surface of the module frame.

8. In paragraph 7, A battery module characterized in that the above-mentioned bending portions are provided in at least one pair and configured to face each other.

9. In paragraph 1, The above frame cover A battery module characterized by having a guide portion configured to guide a position of connection with the module frame.

10. In paragraph 1, A battery module characterized in that a second venting hole is formed in the frame cover at a position corresponding to the first venting hole.

11. In paragraph 10, A battery module characterized in that the second venting hole is formed in the first cover.

12. In paragraph 10, The above frame cover A battery module characterized by having a cover member that covers the second venting hole and is configured to be openable by the venting gas.

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

14. A vehicle comprising a battery module according to any one of claims 1 to 12.

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