Battery module

Abstract

The present invention relates to a battery module comprising: a cell assembly including a plurality of battery cells; a main body frame for accommodating the cell assembly in the inner space thereof; a bus bar frame electrically connected to the cell assembly; and an end plate coupled to one side or the other side of the main body frame, wherein the main body frame and the end plate are coupled to each other through male-female coupling.

Description

battery module

[0001] This application claims the benefit of priority to Korean Patent Application No. 2023-0188263, filed December 21, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a battery module, and more particularly, to a battery module having improved assembly position precision of each component.

[0003]

[0004] As technological development and demand for mobile devices increase, rechargeable secondary batteries are increasingly being used as energy sources for a variety of mobile devices. Secondary batteries are also attracting attention as an energy source for electric and hybrid electric vehicles, offering an alternative to conventional gasoline and diesel vehicles that rely on fossil fuels.

[0005] Secondary batteries are classified into cylindrical and prismatic batteries, in which the electrode assembly is built into a cylindrical or prismatic metal can, and pouch-type batteries, in which the electrode assembly is built into a pouch-type case made of aluminum laminate sheet, depending on the shape of the battery case.

[0006] In the case of hybrid or electric vehicles, since they can obtain driving power from battery packs, they have the advantage of being more fuel efficient and emitting no or reduced pollutants compared to vehicles that only use internal combustion engines.

[0007] Battery packs used in hybrid or electric vehicles include battery modules that include a plurality of battery cells, and as the plurality of battery cells are connected in series and / or parallel with each other, the capacity and output of the battery module increase.

[0008] Figure 1 is an exploded perspective view illustrating a battery module according to the prior art.

[0009] Referring to FIG. 1, a battery module according to the prior art is composed of a frame member (20) that accommodates a cell assembly (10) and an end plate (30) coupled thereto.

[0010] These frame members (20) and end plates (30) are assembled with their positions and postures determined by an assembly jig, and are assembled by applying pressure to all six surfaces for precise welding.

[0011] At this time, the frame member (20) is provided with a thin thickness, so that the frame member (20) may be deformed when pressurized. In addition, there is a problem in that the positional accuracy is reduced due to the posture or position of the parts being assembled in a distorted state due to the tolerance of the parts or the alignment or deviation of the assembly jig.

[0012]

[0013] (Prior art literature)

[0014] (Patent Document 1) Korean Patent Publication No. 10-2023-0064565

[0015]

[0016] In order to solve the above problems, the purpose is to provide a battery module in which deformation of parts is minimized during the process of assembling or fastening parts, and the precision of the assembly position of each part is improved.

[0017]

[0018] As a technical means for achieving the above purpose, a battery module according to one embodiment of the present invention includes a cell assembly (100) including a plurality of battery cells; a main body frame (200) for accommodating the cell assembly (100) in an internal space; a bus bar frame (300) provided to be electrically connected to the cell assembly (100) and an end plate (400) coupled to one side or the other side of the main body frame (200); wherein the main body frame (200) and the end plate (400) are characterized in that they are coupled in a male-female manner.

[0019] In addition, in a battery module according to one embodiment of the present invention, the end plate (400) is characterized by including a first end plate (410) coupled to one side of the main body frame (200); and a second end plate (420) coupled to the other side of the main body frame (200).

[0020] In addition, in the battery module according to one embodiment of the present invention, the first end plate (410) is characterized by including a 1a end plate (411) positioned on one side of the main body frame (200) and having one or more second protrusions (411a) provided along an edge, and a 1b end plate (412) coupled to the other side of the 1a end plate (411) and provided so as to electrically insulate between the cell assembly (100) and the 1a end plate (411).

[0021] In addition, in the battery module according to one embodiment of the present invention, a first fastening hole (411c) is formed in the 1a end plate (411), and a first fastening member (412a) is provided in the 1b end plate (412), so that the 1a end plate (411) and the 1b end plate (412) are coupled by the coupling of the first fastening hole (411c) and the first fastening member (412a).

[0022] In addition, in the battery module according to one embodiment of the present invention, the second end plate (420) is characterized by including a second a end plate (421) positioned on the other side of the main body frame (200) and having one or more third protrusions (421a) provided along an edge, and a second b end plate (422) coupled to one side of the second a end plate (421) and provided so as to electrically insulate between the cell assembly (100) and the second a end plate (421).

[0023] In addition, in the battery module according to one embodiment of the present invention, a second fastening hole (421b) is formed in the second a end plate (421), and a second fastening member (422a) is provided in the second b end plate (422), so that the second a end plate (421) and the second b end plate (422) are fastened by the coupling of the second fastening hole (421b) and the second fastening member (422a).

[0024] In addition, in a battery module according to one embodiment of the present invention, the main body frame (200) is characterized by including a first main body frame (210) in which the cell assembly (100) is accommodated in an internal space and which is open at the top and both sides; and a second main body frame (220) which is mounted on the upper end of the first main body frame (210).

[0025] In addition, in the battery module according to one embodiment of the present invention, a first recessed portion (211) is formed at one end of the first main body frame (210) in which a portion of the area is recessed inward, a third recessed portion (221a) is formed at one end of the second main body frame (220) in which a portion of the area is recessed inward, and the first recessed portion (211) and the third recessed portion (221a) are characterized in that they are male-female coupled with the second protrusion (411a).

[0026] In addition, in the battery module according to one embodiment of the present invention, the second main body frame (220) is provided with an extension portion (221) formed by protruding a central portion thereof, and the third recessed portion (221a) is characterized in that it is formed in the extension portion (221).

[0027] In addition, in the battery module according to one embodiment of the present invention, at least one second protrusion (411a) is formed on each side of the 1a end plate (411), and a mounting die (411b) having a partially sunken upper edge is formed on the 1a end plate (411) so that the extension (221) is mounted thereon.

[0028] In addition, in the battery module according to one embodiment of the present invention, a second recessed portion (212) is formed at the other end of the first main body frame (210) in which a portion of the area is recessed inward, a fourth recessed portion (222) is formed at the other end of the second main body frame (220) in which a portion of the area is recessed inward, and the second recessed portion (212) and the fourth recessed portion (222) are characterized in that they are male-female coupled with the third protrusion (421a).

[0029] In addition, in the battery module according to one embodiment of the present invention, it is characterized in that at least one of the third protrusions (421a) is formed on each side of the second a end plate (421).

[0030] In addition, in the battery module according to one embodiment of the present invention, a first protrusion (213) is formed on the upper end of the first main body frame (210) so that a portion thereof protrudes upward, a fifth recessed portion (223) is formed on the side of the second main body frame (220) so that a portion thereof is recessed inward, and the first protrusion (213) and the fifth recessed portion (223) are characterized in that they are male and female coupled to each other.

[0031] In addition, in a battery module according to one embodiment of the present invention, the busbar frame (300) is characterized by including a first busbar frame (310) arranged on one side of the cell assembly (100) and a second busbar frame (320) arranged on the other side of the cell assembly (100).

[0032] In addition, in a battery module according to one embodiment of the present invention, the first bus bar frame (310) includes a module terminal (311) protruding to one side, and the 1b end plate (412) is provided with a terminal hole (412b) formed so that the module terminal (311) can pass through.

[0033]

[0034] As described above, the battery module according to the present invention has the advantage of being easy to assemble the main body frame and the end plate because the main body frame and the end plate are structured to be joined through a male-female connection.

[0035] In addition, according to the battery module according to the present invention, since the main body frame and the end plate are structured to be joined through a male-female joint, the joining position is accurate, and this has the advantage of minimizing deformation of the main body frame.

[0036]

[0037] Figure 1 is an exploded perspective view illustrating a battery module according to the prior art.

[0038] Figure 2 is a perspective view illustrating a battery module according to one embodiment of the present invention.

[0039] Figure 3 is an exploded perspective view illustrating a battery module according to one embodiment of the present invention.

[0040] Fig. 4 is a perspective view illustrating a main body frame of a battery module according to one embodiment of the present invention.

[0041] Figure 5 is a drawing for explaining how part A shown in Figure 4 is combined.

[0042] FIG. 6 is a perspective view illustrating a state in which a first end plate of a battery module according to one embodiment of the present invention is coupled to a main body frame.

[0043] FIG. 7 is an exploded perspective view illustrating a first end plate of a battery module according to one embodiment of the present invention.

[0044] FIG. 8 is a perspective view illustrating a state before the first end plate of the battery module according to one embodiment of the present invention is coupled to the main body frame.

[0045] Fig. 9 is a perspective view of the first end plate illustrated in Fig. 8 as viewed from the other side.

[0046] Figure 10 is an enlarged view of parts B and C of Figure 6.

[0047] FIG. 11 is a perspective view illustrating a state in which a second end plate of a battery module according to one embodiment of the present invention is coupled to a main body frame.

[0048] FIG. 12 is an exploded perspective view illustrating a second end plate of a battery module according to one embodiment of the present invention.

[0049] FIG. 13 is a perspective view illustrating a state before the second end plate of the battery module according to one embodiment of the present invention is coupled to the main body frame.

[0050] Fig. 14 is a perspective view of the second end plate illustrated in Fig. 13 as viewed from the other side.

[0051]

[0052] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail, so that those skilled in the art can easily implement the present invention. However, when describing the operating principles of preferred embodiments of the present invention in detail, if a detailed description of a related known function or configuration is judged to unnecessarily obscure the gist of the present invention, such detailed description will be omitted.

[0053] Additionally, the same drawing reference numerals are used for parts with similar functions and actions throughout the drawings. Throughout the specification, when a part is said to be connected to another part, this includes not only direct connections but also indirect connections with other elements intervening. Furthermore, inclusion of a component does not exclude other components unless specifically stated otherwise, but rather implies the inclusion of additional components.

[0054]

[0055] Below, a battery module according to the present invention is described.

[0056] Fig. 2 is a perspective view illustrating a battery module according to one embodiment of the present invention, and Fig. 3 is an exploded perspective view illustrating a battery module according to one embodiment of the present invention. In addition, Fig. 4 is a perspective view illustrating a main body frame of a battery module according to one embodiment of the present invention, and Fig. 5 is a drawing illustrating a combined appearance of part A shown in Fig. 4.

[0057] Referring to FIGS. 2 to 5 together, a battery module according to the present invention includes a cell assembly (100), a main body frame (200), a busbar frame (300), and an end plate (400).

[0058] First, the cell assembly (100) may include a plurality of battery cells. The battery cells may be pouch-type secondary batteries including an electrode assembly, an electrode lead, and a battery case.

[0059] The electrode assembly may be formed of, but is not limited to, a jelly-roll type electrode assembly having a structure in which a separator is interposed between long sheet-shaped cathodes and anodes and then rolled up, a stack type electrode assembly having unit cells in which rectangular cathodes and anodes are stacked with a separator interposed between them, a stack-folding type electrode assembly in which the unit cells are rolled up by a long separator film, or a lamination-stack type electrode assembly in which the unit cells are stacked with a separator interposed between them and attached to each other.

[0060] The positive electrode is composed of a positive electrode current collector and a positive electrode active material applied to the upper and lower surfaces of the positive electrode current collector. A conductive material and a binder may be mixed with the positive electrode active material, and a filler may be further added as needed.

[0061] The negative electrode is composed of a negative electrode current collector and a negative electrode active material applied to the lower and upper surfaces of the negative electrode current collector. A conductive material and a binder may be additionally mixed into the negative electrode active material and coated on the negative electrode current collector.

[0062] The separator prevents shorting between the aforementioned negative electrode and positive electrode and only allows the movement of lithium ions. The material of the separator is preferably one selected from among polyethylene, polypropylene, polyethylene / polypropylene double layer, polyethylene / polypropylene / polyethylene triple layer, polypropylene / polyethylene / polypropylene triple layer, and organic fiber filter paper, but is not limited thereto.

[0063] The battery case that houses the electrode assembly forms a housing using a laminate sheet composed of an outer covering layer, a metal layer, and an inner covering layer.

[0064] Since the inner covering layer is in direct contact with the electrode assembly, it must have insulation and electrolytic resistance, and in order to seal it from the outside, the sealing area where the inner layers are thermally bonded must have excellent thermal bonding strength.

[0065] Materials for such inner covering layers may be selected from, but are not limited to, polyolefin resins such as polypropylene, polyethylene, polyethylene acrylic acid, and polybutylene, which have excellent chemical resistance and good sealing properties, polyurethane resins, and polyimide resins, and polypropylene, which has excellent mechanical properties such as tensile strength, rigidity, surface hardness, and impact strength, and excellent chemical resistance, is most preferable.

[0066] The metal layer in contact with the inner covering layer serves as a barrier layer that prevents moisture or various gases from penetrating into the battery from the outside, and a preferred material for this metal layer is an aluminum film that is lightweight and has excellent formability.

[0067] And the other side of the metal layer is provided with an outer covering layer, and this outer covering layer can use a heat-resistant polymer with excellent tensile strength, moisture permeability, and air permeability to protect the electrode assembly while ensuring heat resistance and chemical resistance, and examples thereof include, but are not limited to, nylon or polyethylene terephthalate.

[0068] Meanwhile, the main body frame (200) may include a first main body frame (210) and a second main body frame (220). The first main body frame (210) may be a frame in which a cell assembly (100) is accommodated in an internal space and has an upper portion (12 o'clock direction based on FIG. 3) and both sides (4-10 o'clock direction based on FIG. 3) open. That is, the first main body frame (210) may be a U-type frame.

[0069] A first recessed portion (211) and a second recessed portion (212) in which a portion of the first body frame (210) is sunken inward may be formed at one end and the other end, respectively, and a detailed description thereof will be provided later.

[0070] Additionally, a first protrusion (213) that partially protrudes upward may be formed on the upper end of the first main body frame (210). For example, the first protrusion (213) may be formed to partially protrude upward in a predetermined area of ​​a pair of upper side edges that support both sides of the cell assembly (100).

[0071] Here, it is preferable that a plurality of first protrusions (213) are provided, and it is more preferable that a plurality of first protrusions (213) are provided on the upper side of each side.

[0072] In addition, the second body frame (220) may be a frame that is mounted on the upper side of the first body frame (210). That is, the second body frame (220) may be an upper plate that is mounted on the upper side of the first body frame (210), which is a U-shaped frame, and accordingly, the cell assembly (100) may be stored in the internal space of the body frame (200).

[0073] A third recessed portion (221a) and a fourth recessed portion (222), in which a portion of the second body frame (220) is sunken inward, may be formed at one end and the other end, respectively. The third recessed portion (221a) may be formed on an extension portion (221) formed by protruding the center of one end (4 o'clock direction in FIG. 3) of the second body frame (200), and a detailed description of the third recessed portion (221a) and the fourth recessed portion (222) will be described later.

[0074] Additionally, a fifth recessed portion (223) having a portion sunken inward may be formed on the side of the second main body frame (220). The fifth recessed portion (223) may be provided to be male-female coupled with the first protrusion (213). Here, the male-female coupling may mean a coupling (connection) in which the first protrusion (213) is inserted into the fifth recessed portion (223).

[0075] The fifth recessed portion (223) may be formed to correspond to the size and position in which the first protrusion (213) can be inserted. For example, it may be preferable to set the fifth recessed portion (223) to be larger than the size of the first protrusion (213) by a margin of error, taking into account construction errors, manufacturing errors, etc., but may be set to restrict movement in one and the other directions (4 o'clock to 10 o'clock directions based on FIG. 2) of the first main body frame (210) and the second main body frame (220).

[0076] These first body frame (210) and second body frame (220) can prevent one-sided and other-sided flow when assembled.

[0077] The busbar frame (300) may be provided to be electrically connected to the cell assembly (100). The busbar frame (300) connects a plurality of battery cells included in the cell assembly (100) in series and / or parallel, and may be formed of a metal material having excellent electrical conductivity, and the shape of the width and thickness may be appropriately selected depending on the structure of the battery module, etc.

[0078] Additionally, various methods can be used to electrically connect the busbar frame (300) and the cell assembly (100).

[0079] This busbar frame (300) may include a first busbar frame (310) positioned on one side (4 o'clock direction as of FIG. 3) of the cell assembly (100) and a second busbar frame (320) positioned on the other side (10 o'clock direction as of FIG. 3) of the cell assembly (100).

[0080] The first busbar frame (310) may be provided with a module terminal (311) protruding to one side. This module terminal (311) may connect the battery module to other external components, such as other battery modules or pack terminals. The module terminal (311) may be a terminal through which a charge / discharge current for the cell assembly (100) flows, and the module terminal (311) may be provided with a positive terminal and a negative terminal.

[0081] Continuing, the end plate (400) may be provided to be coupled to both sides of the main body frame (200).

[0082] Such an end plate (400) may include a first end plate (410) coupled to one side of the main body frame (200) and a second plate (420) coupled to the other side of the main body frame (200).

[0083] FIG. 6 is a perspective view illustrating a state in which a first end plate of a battery module according to one embodiment of the present invention is coupled to a main body frame, and FIG. 7 is an exploded perspective view illustrating a first end plate of a battery module according to one embodiment of the present invention.

[0084] Also, FIG. 8 is a perspective view for explaining a state before the first end plate of the battery module according to one embodiment of the present invention is coupled to the main body frame, FIG. 9 is a perspective view of the first end plate illustrated in FIG. 8 as viewed from the other side, and FIG. 10 is an enlarged view of parts B and C of FIG. 6.

[0085] Referring to FIGS. 2 to 10 together, the first end plate (410) may include a first a end plate (411) and a first b end plate (412). The first a end plate (411) may be located on one side (4 o'clock direction with reference to FIG. 2) of the main body frame (200).

[0086] Additionally, the first a end plate (411) may be provided with one or more second protrusions (411a) along the edge, and one or more of these second protrusions (411a) may be formed on each side of the first a end plate (411). For example, one or more, preferably two or more, second protrusions (411a) may be formed on each of the four sides of the first a end plate (411).

[0087] The second protrusion (411a) can be male-female coupled with the first recessed portion (211) formed on the first main body frame (210) and the third recessed portion (221a) formed on the second main body frame (220). For example, the first recessed portion (211) can be formed one or more times for each of the three plates forming the first main body frame (210) and the third recessed portion (221a) can be formed one or more times for each of the three plates forming the first main body frame (210) and the third recessed portion (221a) can be formed one or more times for each of the two sides of the second main body frame (220).

[0088] The first recessed portion (211) and the third recessed portion (221a) may be provided so that the formation position and size of the second protrusion (411a) correspond to each other. As described above, it may be preferable that the first recessed portion (211) and the third recessed portion (221a) be set to be larger than the size of the second protrusion (411a) by a margin of error, taking into account construction errors, manufacturing errors, etc.

[0089] And, a partially sunken mounting die (411b) may be formed on the upper part of the first end plate (411) so that an extension portion (221) formed by protruding the central portion of one end of the second main body frame (220) is mounted thereon.

[0090] The settling die (411b) may have a partially sunken shape to correspond to the shape and thickness of the extension portion (221), and further, the settling die (411b) may be provided with a second protrusion (411a) so as to be male-female coupled with a third sunken portion (221a) formed in the extension portion (221).

[0091] As a result, the extension (221) is seated on the settling die (411b), and the second protrusion (411a) and the third recessed portion (221a) are connected male and female, so that the first a end plate (411) and the second main body frame (220) can be more stably connected (coupled).

[0092] Meanwhile, a first fastening hole (411c) may be formed in the 1a end plate (411), and one or more first fastening holes (411c) may be formed in a slit shape in the 1a end plate (411). This first fastening hole (411c) may be formed for fastening (bonding) with the 1b end plate (412).

[0093] The first b end plate (412) may be provided so that the cell assembly (100) and the first a end plate (411) are electrically insulated while being coupled to the first a end plate (411) at the other side of the first a end plate (411), that is, between the first a end plate (411) and the first bus bar frame (310). For example, the first b end plate (412) may be provided with an electrically insulating material, and there are no particular limitations on the material as long as it is a material having insulating properties and heat resistance.

[0094] The first b end plate (412) may be provided with a first fastening member (412a). The first fastening member (412a) may be provided to be coupled with the first fastening hole (411c) of the first a end plate (411), and the first a end plate (411) and the first b end plate (412) may be coupled by the coupling of the first fastening member (412a) and the first fastening hole (411c).

[0095] For example, the first fastening member (412a) may be provided in the form of a hook that partially protrudes from one side of the first b end plate (412) toward one side, and has an end bent at a predetermined angle. Here, when the first fastening member (412a) is inserted into the first fastening hole (411c), it is inserted elastically at a predetermined angle.

[0096] One or more of these first fastening members (412a) may be provided on one surface of the first b end plate (412).

[0097] Additionally, a terminal hole (412b) may be formed in the first b end plate (412) so that the module terminal (311) of the first bus bar frame (310) may pass through. The terminal hole (412b) may be provided to expose the module terminal (311) to the outside, and thus, the module terminal (311) may be exposed to the outside through the terminal hole (412b) and be electrically connected to other external components.

[0098] FIG. 11 is a perspective view illustrating a state in which a second end plate of a battery module according to one embodiment of the present disclosure is coupled to a main body frame, and FIG. 12 is an exploded perspective view illustrating a second end plate of a battery module according to one embodiment of the present disclosure. In addition, FIG. 13 is a perspective view illustrating a state before a second end plate of a battery module according to one embodiment of the present disclosure is coupled to a main body frame, and FIG. 14 is a perspective view of the second end plate illustrated in FIG. 13 as viewed from the other side.

[0099] Referring to FIGS. 2 to 5 and FIGS. 11 to 15 together, the second end plate (420) may include a seconda end plate (421) and a secondb end plate (422). The seconda end plate (421) may be located on the other side (10 o'clock direction with respect to FIG. 2) of the main body frame (200).

[0100] Additionally, the second a end plate (421) may be provided with one or more third protrusions (421a) along the edge, and one or more of these third protrusions (421a) may be formed on each side of the second a end plate (421). For example, one or more (e.g., two) of the third protrusions (421a) may be formed on each of the four sides of the second a end plate (421).

[0101] The third protrusion (421a) can be male-female coupled with the second recessed portion (212) formed on the first main body frame (210) and the fourth recessed portion (222) formed on the second main body frame (220). For example, the second recessed portion (212) can be formed one or more times on the other end (three sides) of the three plates forming the first main body frame (210), and the fourth recessed portion (222) can be formed one or more times on the other end (one side) of the second main body frame (220).

[0102] The second recessed portion (212) and the fourth recessed portion (222) may be provided so that the formation position and size of the third protrusion (421a) correspond to each other. As described above, it may be preferable that the second recessed portion (212) and the fourth recessed portion (222) be set to be larger than the size of the third protrusion (421a) to a degree that takes into account the error range, taking into account construction errors, manufacturing errors, etc.

[0103] And, a partially sunken mounting die (not shown) may be formed on the upper part of the second end plate (421) so that the other end of the second main body frame (220) may be mounted, and the mounting die (not shown) may be provided with a third protrusion (421a) so that it may be male-female coupled with the fourth sunken part (222).

[0104] Meanwhile, a second fastening hole (421b) may be formed in the second a end plate (421), and one or more second fastening holes (421b) may be formed in a slit shape in the second a end plate (421). This second fastening hole (421b) may be formed for fastening (bonding) with the second b end plate (422).

[0105] The second b end plate (422) is coupled to the second a end plate (421) while being interposed between one side of the second a end plate (421), that is, between the second a end plate (421) and the second bus bar frame (320), and may be provided so as to electrically insulate the cell assembly (100) from the second a end plate (421). For example, the second b end plate (422) may be made of the same material as the first b end plate (412).

[0106] The second b end plate (422) may be provided with a second fastening member (422a). The second fastening member (422a) may be provided to be coupled with the second fastening hole (421b) of the second a end plate (421), and the second a end plate (421) and the second b end plate (422) may be coupled by the coupling of the second fastening member (422a) and the second fastening hole (421b).

[0107] For example, the second fastening member (422a) may be provided in the form of a hook that partially protrudes from the other side of the second b end plate (422) toward the other side, and has an end that is inclined at a predetermined angle. Here, when the second fastening member (422a) is inserted into the second fastening hole (421b), it is inserted elastically inclined at a predetermined angle.

[0108] One or more of these second fastening members (422a) may be provided on the other surface of the second b end plate (422).

[0109] As described above, the battery module of the present invention can be connected to one side and the other side of the main body frame (200) by a male-female connection of the first end plate (410) and the second end plate (420). Accordingly, the first end plate (410) and the second end plate (420) can minimize movement in the up-and-down direction (6 o'clock to 12 o'clock direction based on FIG. 2) with respect to the first main body frame (210), and can minimize movement in the left-right direction (1 o'clock to 7 o'clock direction based on FIG. 2) with respect to the second main body frame (220). Of course, when assembling or pressurizing the main body frame (200) and the end plate (400), deformation of the parts can be minimized, thereby improving the precision of the assembly position.

[0110]

[0111] As described above, specific parts of the present invention have been described in detail. To those skilled in the art, such specific descriptions are merely preferred embodiments, and the scope of the present invention is not limited thereby. It is obvious to those skilled in the art that various changes and modifications are possible within the scope and technical idea of ​​the present invention, and it is natural that such changes and modifications fall within the scope of the appended patent claims.

[0112] (Explanation of symbols)

[0113] 100: Cell Assembly

[0114] 200: Body frame

[0115] 210: First body frame

[0116] 211: First depression 212: Second depression

[0117] 213: First protrusion

[0118] 220: Second main body frame

[0119] 221: Extension 221a: Third depression

[0120] 222: 4th depression

[0121] 223: Fifth depression

[0122] 300: Busbar frame

[0123] 310: First busbar frame 311: Module terminal

[0124] 320: Second busbar frame

[0125] 400: End Plate

[0126] 410: First end plate

[0127] 411: 1a End Plate

[0128] 411a: Second protrusion 411b: Settling die

[0129] 411c: First fastening hole

[0130] 412: 1b end plate

[0131] 412a: First fastening member 412b: Terminal hole

[0132] 420: Second end plate

[0133] 421: 2a end plate

[0134] 421a: Third protrusion 421b: Second fastening hole

[0135] 422: 2nd end plate 422a: 2nd fastening member

Claims

1. A cell assembly comprising a plurality of battery cells; A main body frame for storing the cell assembly in an internal space; A busbar frame provided to be electrically connected to the above cell assembly; and An end plate coupled to one side or the other side of the above main body frame; including: A battery module characterized in that the main body frame and the end plate are joined by a male-female joint.

2. In paragraph 1, The above end plate, A first end plate coupled to one side of the above main body frame; and A battery module characterized by including a second end plate coupled to the other side of the main body frame.

3. In paragraph 2, The above first end plate, A first end plate positioned on one side of the main body frame and having one or more second protrusions provided along an edge, and A battery module characterized by including a 1b end plate coupled to the other side of the 1a end plate and provided so as to electrically insulate between the cell assembly and the 1a end plate.

4. In paragraph 3, A battery module, characterized in that a first fastening hole is formed in the 1a end plate, a first fastening member is provided in the 1b end plate, and the 1a end plate and the 1b end plate are fastened by fastening the first fastening hole and the first fastening member.

5. In paragraph 3, The above second end plate, A second end plate positioned on the other side of the main body frame and having one or more third protrusions provided along the edge, and A battery module characterized by including a second b end plate coupled to one side of the second a end plate and provided so as to electrically insulate between the cell assembly and the second a end plate.

6. In paragraph 5, A battery module, characterized in that a second fastening hole is formed in the second a end plate, a second fastening member is provided in the second b end plate, and the second a end plate and the second b end plate are fastened by fastening the second fastening hole and the second fastening member.

7. In paragraph 5, The above main body frame, A first main body frame having an inner space for accommodating the above cell assembly and having an upper and two side open sides; and A battery module characterized by including a second body frame mounted on the upper side of the first body frame.

8. In paragraph 7, At one end of the first main body frame, a first recessed portion is formed in which a portion of the recessed portion is sunken inward. A third recessed portion is formed in one end of the second main body frame, with a portion of the recessed portion recessed inwardly. A battery module characterized in that the first recessed portion and the third recessed portion are malely and femalely connected to the second protruding portion.

9. In paragraph 8, The second main body frame is provided with an extension formed by protruding a central portion thereof. A battery module characterized in that the third recessed portion is formed in the extension portion.

10. In paragraph 9, The above second protrusion is formed at least once on each side of the above 1a end plate, A battery module characterized in that the first end plate has a mounting die formed with a partially sunken upper edge to allow the extension to be mounted thereon.

11. In paragraph 7, A second recessed portion is formed at the other end of the first main body frame, with a portion of the recessed portion being sunken inward. A fourth recessed portion is formed at the other end of the second main body frame, with a portion of the recessed portion being sunken inward. A battery module characterized in that the second recessed portion and the fourth recessed portion are male-female coupled with the third protrusion.

12. In paragraph 11, A battery module, characterized in that at least one of the third protrusions is formed on each side of the second a end plate.

13. In paragraph 7, A first protrusion is formed on the upper part of the first main body frame, with a portion protruding upward. A fifth recessed portion is formed on the side of the second main body frame, with a portion of the recessed portion being sunken inward. A battery module characterized in that the first protrusion and the fifth recess are male and female connected to each other.

14. In paragraph 2, The above busbar frame, A battery module characterized by including a first busbar frame arranged on one side of the cell assembly and a second busbar frame arranged on the other side of the cell assembly.

15. In paragraph 11, The above first busbar frame includes a module terminal protruding to one side, A battery module characterized in that the first end plate has a terminal hole formed so that the module terminal can pass through.

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