Battery Module

Abstract

The present invention relates to a battery module including a cell assembly including a plurality of battery cells, a main body frame that houses the cell assembly in an internal space, a bus bar frame configured to be 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 in a male-female coupling manner.

Description

[Technical Field]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0188263, 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 with improved assembly position precision for each component. [Background technology]

[0003] As technological development and demand for mobile devices continues to grow, rechargeable secondary batteries are being used as energy sources for various mobile devices. Secondary batteries are also attracting attention as energy sources for electric vehicles and hybrid electric vehicles, which are being proposed as alternatives to existing gasoline-powered vehicles and diesel-powered vehicles that use fossil fuels.

[0004] Depending on the shape of the battery case, secondary batteries are classified into cylindrical batteries and prismatic batteries, in which the electrode assembly is housed in a cylindrical or prismatic metal can, and pouch batteries, in which the electrode assembly is housed in a pouch-shaped case made of an aluminum laminate sheet.

[0005] Hybrid and electric vehicles can obtain driving power from a battery pack, which has the advantage of being more fuel efficient and emitting less or no pollutants compared to vehicles that use only internal combustion engines.

[0006] A battery pack used in a hybrid vehicle or an electric vehicle includes a battery module including a number of battery cells, and the capacity and output of the battery module are increased by connecting the battery cells in series and / or in parallel with each other.

[0007] FIG. 1 is an exploded perspective view illustrating a battery module according to the prior art.

[0008] Referring to FIG. 1, a battery module according to the prior art comprises a frame member 20 that houses cell assemblies 10 and end plates 30 that are coupled thereto.

[0009] The frame member 20 and the end plate 30 are assembled in such a manner that their posture and position are determined by an assembly jig, and all six surfaces are pressed together for precision welding.

[0010] Here, the frame member 20 has a thin thickness, and may be deformed when pressed. Also, there is a problem that the positional precision is reduced when the parts are assembled in a misaligned state or position due to the tolerance of the parts or the alignment or deviation of the assembly jig. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] Korean Patent Publication No. 10-2023-0064565 Summary of the Invention [Problem to be solved by the invention]

[0012] In order to solve the above problems, an object of the present invention is to provide a battery module in which deformation of parts is minimized during the process of assembling or fastening parts, and the assembly position precision of each part is improved. [Means for solving the problem]

[0013] As technical means for achieving the above object, 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) that houses the cell assembly (100) in an internal space, a bus bar frame (300) configured 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), and the main body frame (200) and the end plate (400) are coupled in a male-female coupling manner.

[0014] In addition, in the battery module according to one embodiment of the present invention, the end plate (400) includes a first end plate (410) coupled to one side of the main frame (200) and a second end plate (420) coupled to the other side of the main frame (200).

[0015] In addition, in a battery module according to one embodiment of the present invention, the first end plate (410) is characterized by including a 1a end plate (411) located on one side of the main frame (200) and having one or more second protrusions (411a) along its edge, and a 1b end plate (412) coupled to the other side of the 1a end plate (411) and configured to electrically insulate the cell assembly (100) from the 1a end plate (411).

[0016] In addition, in a battery module according to one embodiment of the present invention, a first fastening hole (411c) is formed in the 1a end plate (411), and the 1b end plate (412) has a first fastening member (412a), and the 1a end plate (411) and the 1b end plate (412) are coupled together by coupling the first fastening hole (411c) and the first fastening member (412a).

[0017] In addition, in a battery module according to one embodiment of the present invention, the second end plate (420) is characterized by including a 2a end plate (421) located on the other side of the main frame (200) and having one or more third protrusions (421a) along its edge, and a 2b end plate (422) coupled to one side of the 2a end plate (421) and configured to electrically insulate the cell assembly (100) from the 2a end plate (421).

[0018] In addition, in a battery module according to one embodiment of the present invention, a second fastening hole (421b) is formed in the 2a end plate (421), and the 2b end plate (422) has a second fastening member (422a), and the 2a end plate (421) and the 2b end plate (422) are coupled together by coupling the second fastening hole (421b) and the second fastening member (422a).

[0019] In addition, in the battery module according to one embodiment of the present invention, the body frame (200) includes a first body frame (210) that accommodates the cell assembly (100) in its internal space and is open at the top and both sides, and a second body frame (220) that is seated on the upper end of the first body frame (210).

[0020] In addition, in a battery module according to one embodiment of the present invention, a first recessed portion (211) having a recessed area inward is formed at one end of the first body frame (210), and a third recessed portion (221a) having a recessed area inward is formed at one end of the second body frame (220), and the first recessed portion (211) and the third recessed portion (221a) are coupled to the second protrusion portion (411a) in a male-female coupling manner.

[0021] In addition, in the battery module according to one embodiment of the present invention, the second body frame (220) has an extension portion (221) formed by protruding from the center of one end, and the third recessed portion (221a) is formed in the extension portion (221).

[0022] In addition, in a battery module according to one embodiment of the present invention, one or more second protrusions (411a) are formed on each side of the 1a end plate (411), and the 1a end plate (411) is formed with a seating base (411b) having a recessed portion of its upper edge so that the extension portion (221) can be seated thereon.

[0023] In addition, in a battery module according to one embodiment of the present invention, a second recessed portion (212) having a recessed area inward is formed at the other end of the first body frame (210), and a fourth recessed portion (222) having a recessed area inward is formed at the other end of the second body frame (220), and the second recessed portion (212) and the fourth recessed portion (222) are coupled to the third protrusion (421a) in a male-female coupling manner.

[0024] In addition, in the battery module according to an embodiment of the present invention, at least one third protrusion (421a) is formed on each side of the second end plate (421).

[0025] In addition, in a battery module according to one embodiment of the present invention, a first protrusion (213) having a partial area protruding upward is formed on the upper end of the first body frame (210), and a fifth recess (223) having a partial area recessed inward is formed on the side of the second body frame (220), and the first protrusion (213) and the fifth recess (223) are coupled to each other in a male-female coupling manner.

[0026] In addition, in a battery module according to one embodiment of the present invention, the bus bar frame (300) includes a first bus bar frame (310) disposed on one side of the cell assembly (100) and a second bus bar frame (320) disposed on the other side of the cell assembly (100).

[0027] In addition, in the battery module according to one embodiment of the present invention, the first bus bar frame (310) includes a module terminal (311) protruding from one side, and the first end plate (412) includes a terminal hole (412b) formed so that the module terminal (311) passes through. [Effects of the Invention]

[0028] As described above, the battery module according to the present invention has a structure in which the main frame and the end plates are coupled by male-female coupling, which has the advantage that the main frame and the end plates can be easily assembled.

[0029] In addition, according to the battery module of the present invention, since the main frame and the end plate are connected in a male-female manner, the connection position is accurate, thereby minimizing deformation of the main frame. [Brief explanation of the drawings]

[0030] [Figure 1] FIG. 1 is an exploded perspective view illustrating a battery module according to the prior art. [Figure 2] 1 is a perspective view illustrating a battery module according to an embodiment of the present invention. [Figure 3] 1 is an exploded perspective view illustrating a battery module according to an embodiment of the present invention. [Figure 4] 2 is a perspective view illustrating a main body frame of a battery module according to an embodiment of the present invention; FIG. [Figure 5]FIG. 5 is a diagram for explaining a state in which part A shown in FIG. 4 is coupled. [Figure 6] 4 is a perspective view illustrating a state in which a first end plate of a battery module is coupled to a main body frame according to an embodiment of the present invention. FIG. [Figure 7] FIG. 2 is an exploded perspective view illustrating a first end plate of a battery module according to an embodiment of the present invention. [Figure 8] 3 is a perspective view illustrating a state before a first end plate of a battery module according to an embodiment of the present invention is coupled to a main body frame. FIG. [Figure 9] 9 is a perspective view of the first end plate shown in FIG. 8 as seen from the other side. [Figure 10] 7 is an enlarged view of parts B and C in FIG. 6. [Figure 11] 4 is a perspective view illustrating a state in which a second end plate of a battery module is coupled to a main body frame according to an embodiment of the present invention. FIG. [Figure 12] FIG. 4 is an exploded perspective view illustrating a second end plate of a battery module according to an embodiment of the present invention. [Figure 13] 4 is a perspective view illustrating a state before a second end plate of a battery module according to an embodiment of the present invention is coupled to a main body frame. FIG. [Figure 14] FIG. 14 is a perspective view of the second end plate shown in FIG. 13 as viewed from the other side. DETAILED DESCRIPTION OF THE INVENTION

[0031] Hereinafter, with reference to the accompanying drawings, a detailed description will be given of an embodiment of the present invention that will enable a person skilled in the art to easily carry out the present invention. However, in describing the operation principle of the preferred embodiment of the present invention in detail, if it is determined that a detailed description of related well-known functions or configurations may unnecessarily obscure the gist of the present invention, such detailed description will be omitted.

[0032] Furthermore, the same reference numerals are used throughout the drawings for parts having similar functions and actions. Throughout the specification, when a part is said to be connected to another part, this includes not only a direct connection but also an indirect connection via another element therebetween. Furthermore, unless otherwise specified, "including a certain element" does not mean that other elements are excluded, but that other elements may also be included.

[0033] A battery module according to the present invention will now be described.

[0034] Fig. 2 is a perspective view illustrating a battery module according to an embodiment of the present invention, Fig. 3 is an exploded perspective view illustrating a battery module according to an embodiment of the present invention, Fig. 4 is a perspective view illustrating a main body frame of a battery module according to an embodiment of the present invention, and Fig. 5 is a view illustrating a state in which part A shown in Fig. 4 is coupled.

[0035] 2 to 5, the battery module according to the present invention includes a cell assembly 100, a main body frame 200, a bus bar frame 300, and an end plate 400. As shown in FIG.

[0036] First, the cell assembly 100 can include a plurality of battery cells, which can be pouch-type secondary batteries including an electrode assembly, electrode leads, and a battery case.

[0037] The electrode assembly may be, but is not limited to, a jelly-roll type electrode assembly in which a separator is interposed between a long sheet-shaped negative electrode and a positive electrode and then wound up; a stack type electrode assembly composed of unit cells in which rectangular positive and negative electrodes are stacked with a separator between them; a stack-folding type electrode assembly in which unit cells are wound up with a long separator film; or a lamination-stack type electrode assembly in which unit cells are stacked with a separator between them and attached to each other.

[0038] The positive electrode includes a positive electrode current collector and a positive electrode active material coated on the upper and lower surfaces of the positive electrode current collector. The positive electrode active material may be mixed with a conductive material and a binder, and a filler may be further added as needed.

[0039] The negative electrode includes a negative electrode current collector and a negative electrode active material coated on the upper and lower surfaces of the negative electrode current collector. The negative electrode active material may be further mixed with a conductive material and a binder and coated on the negative electrode current collector.

[0040] The separator prevents short circuits between the negative and positive electrodes and allows only the movement of lithium ions. The separator may be made of any one of polyethylene, polypropylene, a polyethylene / polypropylene double layer, a polyethylene / polypropylene / polyethylene triple layer, a polypropylene / polyethylene / polypropylene triple layer, and organic fiber filter paper, but is not limited thereto.

[0041] The battery case that houses the electrode assembly uses a laminate sheet that is made up of an outer coating layer, a metal layer, and an inner coating layer to form a housing portion.

[0042] Since the inner coating layer is in direct contact with the electrode assembly, it must have insulating properties and electrolytic resistance. Furthermore, in order to seal against the outside, it must have sealing properties, i.e., the sealing portions where the inner layers are thermally bonded together must have excellent thermal adhesive strength.

[0043] The material for such an inner coating layer may be selected from polyolefin resins such as polypropylene, polyethylene, polyethylene acrylic acid, and polybutylene, which have excellent chemical resistance and sealing properties, polyurethane resins, and polyimide resins, but is not limited thereto. Polypropylene, which has excellent mechanical properties such as tensile strength, rigidity, surface hardness, and impact resistance, and excellent chemical resistance, is most preferred.

[0044] The metal layer in contact with the inner coating layer corresponds to a barrier layer that prevents moisture and various gases from penetrating into the interior of the battery from the outside, and a preferred material for such a metal layer is an aluminum thin film, which is lightweight yet has excellent formability.

[0045] An outer coating layer is provided on the other side of the metal layer. This outer coating layer may be made of a heat-resistant polymer having excellent tensile strength, moisture-proof properties, and air-proof properties, so as to protect the electrode assembly while ensuring heat resistance and chemical resistance. Examples of the outer coating layer include, but are not limited to, nylon or polyethylene terephthalate.

[0046] Meanwhile, the body frame 200 may include a first body frame 210 and a second body frame 220. The first body frame 210 may accommodate the cell assembly 100 in its internal space and may be a frame that is open at the top (12 o'clock direction in FIG. 3) and both sides (4 o'clock and 10 o'clock directions in FIG. 3). That is, the first body frame 210 may be a "U"-shaped frame.

[0047] A first recess 211 and a second recess 212, which are recessed inward, may be formed at one end and the other end of the first body frame 210. This will be described in detail later.

[0048] In addition, a first protrusion 213, a portion of which 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 by a portion of the first protrusion 213 protruding upward from a predetermined region of the upper edge of a pair of side surfaces that support both side surfaces of the cell assembly 100.

[0049] Here, it is preferable to provide a plurality of first protrusions 213, and it is more preferable to provide a plurality of first protrusions 213 on the upper end of each side surface.

[0050] Also, the second body frame 220 may be a frame that is seated on the upper end of the first body frame 210. That is, the second body frame 220 may be an upper plate that is seated on the upper end of the first body frame 210, which is a "U"-shaped frame. Therefore, the cell assembly 100 can be accommodated in the internal space of the body frame 200.

[0051] A third recess 221a and a fourth recess 222, which are recessed inward, may be formed at one end and the other end of the second main body frame 220. The third recess 221a may be formed on an extension 221 that is formed by protruding the center of one end (4 o'clock direction in FIG. 3) of the second main body frame 200. The third recess 221a and the fourth recess 222 will be described in detail later.

[0052] In addition, a fifth recess 223, which is a recessed area, may be formed on a side surface of the second body frame 220. The fifth recess 223 may be configured to be coupled to the first protrusion 213 in a male-female coupling manner. Here, the male-female coupling may refer to a coupling (connection) in which the first protrusion 213 is inserted into the fifth recess 223.

[0053] The fifth recess 223 may be formed to correspond to a size and position at which the first protrusion 213 can be inserted. For example, the fifth recess 223 is preferably set larger than the size of the first protrusion 213 to a degree that takes into account the error range, taking into account construction errors, manufacturing errors, etc., and may be set to limit free movement of the first main body frame 210 and the second main body frame 220 in one and other directions (4 o'clock and 10 o'clock directions with reference to FIG. 2).

[0054] The first and second body frames 210 and 220 can prevent loose movement in one and the other direction when assembled.

[0055] The bus bar frame 300 may be configured to be electrically connected to the cell assembly 100. The bus bar frame 300 connects a plurality of battery cells included in the cell assembly 100 in series and / or parallel, and may be made of a metal material with excellent electrical conductivity, and the width and thickness of the bus bar frame 300 may be appropriately selected depending on the structure of the battery module.

[0056] In addition, various methods can be used to electrically connect the bus bar frame 300 and the cell assembly 100.

[0057] Such a bus bar frame 300 may include a first bus bar frame 310 arranged on one side of the cell assembly 100 (at the 4 o'clock direction in FIG. 3) and a second bus bar frame 320 arranged on the other side of the cell assembly 100 (at the 10 o'clock direction in FIG. 3).

[0058] The first bus bar frame 310 may have a module terminal 311 protruding from one side. The module terminal 311 may connect the battery module to other external components, for example, other battery modules or pack terminals. The module terminal 311 is a terminal through which charge / discharge current for the cell assembly 100 flows, and the module terminal 311 may include a positive terminal and a negative terminal.

[0059] Next, the end plates 400 may be configured to be coupled to both sides of the body frame 200 .

[0060] The end plate 400 may include a first end plate 410 coupled to one side of the body frame 200 and a second end plate 420 coupled to the other side of the body frame 200 .

[0061] FIG. 6 is a perspective view illustrating a state in which a first end plate of a battery module according to an 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 an embodiment of the present invention.

[0062] 8 is a perspective view illustrating a state before a first end plate of a battery module according to one embodiment of the present invention is coupled to a main body frame, FIG. 9 is a perspective view of the first end plate shown in FIG. 8 from the other side, and FIG. 10 is an enlarged view of parts B and C of FIG. 6.

[0063] 2 to 10, the first end plate 410 may include an end plate 1a 411 and an end plate 1b 412. The end plate 1a 411 may be located on one side of the main body frame 200 (at the 4 o'clock direction in FIG. 2).

[0064] In addition, the 1a end plate 411 may be provided with one or more second protrusions 411a along its edge, and one or more such second protrusions 411a may be formed on each side of the 1a 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 1a end plate 411.

[0065] The second protrusion 411a may be coupled to the first recess 211 formed on the first body frame 210 and the third recess 221a formed on the second body frame 220 in a male-female coupling manner. For example, one or more first recesses 211 may be formed on one end (three sides) of each of the three plates forming the first body frame 210, and one or more third recesses 221a may be formed on one end (one side) of the second body frame 220.

[0066] The first recess 211 and the third recess 221a may be configured to correspond to each other in terms of the position and size of the second protrusion 411a. As described above, the first recess 211 and the third recess 221a are preferably set larger than the size of the second protrusion 411a to an extent that takes into account the error range, taking into account construction errors, manufacturing errors, etc.

[0067] The upper end of the 1a end plate 411 may be formed with a seat 411b that is partially recessed so that the extension 221 formed by protruding the center of one end of the second main frame 220 can be seated thereon.

[0068] The seat base 411b has a partially recessed shape corresponding to the shape and thickness of the extension portion 221, and the seat base 411b is provided with a second protrusion portion 411a, which can be connected to the third recess portion 221a formed on the extension portion 221 in a male-female connection manner.

[0069] As a result, the extension portion 221 is seated on the seat base 411b, and the second protrusion portion 411a and the third recessed portion 221a are coupled in a male-female manner, thereby enabling the 1a end plate 411 and the second main body frame 220 to be more stably connected (coupled).

[0070] Meanwhile, a first fastening hole 411c is formed in the 1a end plate 411, and one or more first fastening holes 411c may be formed in the 1a end plate 411 in the shape of a slit. Such first fastening holes 411c may be formed for fastening (coupling) with the 1b end plate 412.

[0071] The 1b end plate 412 may be configured to be coupled to the 1a end plate 411 while being positioned on the other side of the 1a end plate 411, i.e., between the 1a end plate 411 and the first bus bar frame 310, thereby electrically insulating the cell assembly 100 from the 1a end plate 411. For example, the 1b end plate 412 may be made of an electrically insulating material, and is not particularly limited as long as it is made of a material that is insulating and heat-resistant.

[0072] The 1b-th end plate 412 may include a first fastening member 412a configured to couple with a first fastening hole 411c of the 1a-th end plate 411, and the 1a-th end plate 411 and the 1b-th end plate 412 may be coupled together by coupling the first fastening member 412a with the first fastening hole 411c.

[0073] For example, the first fastening member 412a may be configured in a hook shape with a portion protruding from one side of the first end plate 412 and an end bent at a predetermined angle. Here, when the first fastening member 412a is inserted into the first fastening hole 411c, it is elastically inserted at a predetermined angle.

[0074] One or more first fastening members 412 a may be provided on one surface of the 1 b end plate 412 .

[0075] In addition, the 1b end plate 412 may have terminal holes 412b formed therein so that the module terminals 311 of the first bus bar frame 310 pass through. The terminal holes 412b are configured to expose the module terminals 311 to the outside, so that the module terminals 311 may be exposed to the outside through the terminal holes 412b and electrically connected to other external components.

[0076] Fig. 11 is a perspective view illustrating a state in which a second end plate of a battery module is coupled to a main body frame according to an embodiment of the present invention, Fig. 12 is an exploded perspective view illustrating a state in which a second end plate of a battery module is coupled to a main body frame according to an embodiment of the present invention, Fig. 13 is a perspective view illustrating a state in which a second end plate of a battery module is not coupled to a main body frame according to an embodiment of the present invention, and Fig. 14 is a perspective view of the second end plate shown in Fig. 13 as seen from the other side.

[0077] 2 to 5 and 11 to 15 together, the second end plate 420 may include a second-a end plate 421 and a second-b end plate 422. The second-a end plate 421 may be located on the other side of the main body frame 200 (at the 10 o'clock direction in FIG. 2).

[0078] In addition, one or more third protrusions 421a may be formed along the edge of the second-a end plate 421. One or more such third protrusions 421a may be formed on each side of the second-a end plate 421. For example, one or more (e.g., two) third protrusions 421a may be formed on each of the four sides of the second-a end plate 421.

[0079] The third protrusion 421a may be coupled to the second recess 212 formed on the first body frame 210 and the fourth recess 222 formed on the second body frame 220 in a male-female coupling manner. For example, one or more second recesses 212 may be formed on the other ends (three sides) of the three plates forming the first body frame 210, and one or more fourth recesses 222 may be formed on the other end (one side) of the second body frame 220.

[0080] The second recess 212 and the fourth recess 222 may be configured to correspond to each other in terms of the position and size of the third protrusion 421a. As described above, the second recess 212 and the fourth recess 222 are preferably set larger than the size of the third protrusion 421a to an extent that takes into account the error range, taking into account construction error, manufacturing error, etc.

[0081] The upper end of the 2a end plate 421 is formed with a seat base (not shown) that is partially recessed so that the other end of the second main body frame 220 can be seated on, and the seat base (not shown) is provided with a third protrusion 421a that can be connected to the fourth recess 222 in a male-female connection manner.

[0082] Meanwhile, second fastening holes 421b are formed in the second-a end plate 421, and one or more second fastening holes 421b may be formed in the second-a end plate 421 in the form of a slit. Such second fastening holes 421b may be formed for fastening (coupling) with the second-b end plate 422.

[0083] The 2b end plate 422 may be coupled to the 2a end plate 421 while being interposed on one side of the 2a end plate 421, i.e., between the 2a end plate 421 and the second bus bar frame 320, to provide electrical insulation between the cell assembly 100 and the 2a end plate 421. For example, the 2b end plate 422 may be made of the same material as the 1b end plate 412.

[0084] The second-b end plate 422 may include a second fastening member 422a configured to couple 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 together by coupling the second fastening member 422a with the second fastening hole 421b.

[0085] For example, the second fastening member 422a may be configured as a hook-shaped member that protrudes from the other surface of the second end plate 422 toward the other side and has an end bent at a predetermined angle. Here, when the second fastening member 422a is inserted into the second fastening hole 421b, it is elastically inserted at a predetermined angle.

[0086] One or more second fastening members 422a may be provided on the other surface of the second end plate 422b.

[0087] As described above, in the battery module of the present invention, the first end plate 410 and the second end plate 420 can be coupled to one side and the other side of the body frame 200 in a male-female coupling manner. Therefore, the first end plate 410 and the second end plate 420 can minimize play in the up-down direction (6 o'clock and 12 o'clock directions in FIG. 2) relative to the first body frame 210, and can minimize play in the left-right direction (1 o'clock and 7 o'clock directions in FIG. 2) relative to the second body frame 220. Of course, when assembling or pressing the body frame 200 and the end plate 400 together, deformation of the parts can be minimized, improving the precision of the assembly position.

[0088] Although specific portions of the contents of the present invention have been described in detail above, it will be apparent to those skilled in the art that such specific techniques are merely preferred embodiments and do not limit the scope of the present invention. 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 goes without saying that such changes and modifications also fall within the scope of the accompanying claims. [Explanation of symbols]

[0089] 100 Cell Assembly 200 main frame 210 First body frame 211 First depression 212 Second depression 213 1st protrusion 220 Second body frame 221 Extension 221a Third depression 222 Fourth depression 223 5th depression 300 Busbar Frame 310 First bus bar frame 311 Module terminal 320 Second bus bar frame 400 End Plate 410 First end plate 411 No. 1a End Plate 411a 2nd protrusion 411b Seating platform 411c 1st Closure Hole 412 1b End Plate 412a First fastening member 412b Terminal hole 420 Second end plate 421 No. 2a End Plate 421a 3rd protrusion 421b 2nd Closing Hole 422 2nd b end plate 422a Second fastening member

Claims

1. a cell assembly including a plurality of battery cells; a main body frame that houses the cell assembly in an internal space; a bus bar frame configured to be electrically connected to the cell assembly; an end plate coupled to one side or the other side of the main body frame, The battery module has the main body frame and the end plate coupled together in a male-female coupling manner.

2. The end plate is a first end plate coupled to one side of the main frame; The battery module according to claim 1 , further comprising: a second end plate coupled to the other side of the main body frame.

3. The first end plate is a first end plate (1a) located on one side of the main frame and having one or more second protrusions along an edge thereof; a 1b end plate coupled to the other side of the 1a end plate and configured to provide electrical insulation between the cell assembly and the 1a end plate.

4. 4. The battery module of claim 3, wherein a first fastening hole is formed in the first end plate, and a first fastening member is provided in the first end plate, and the first end plate and the first b end plate are coupled together by coupling the first fastening hole and the first fastening member.

5. The second end plate is a second end plate located on the other side of the main frame and having one or more third protrusions along an edge thereof; 4. The battery module according to claim 3, further comprising: a second b end plate coupled to one side of the second a end plate and configured to electrically insulate the cell assembly from the second a end plate.

6. 6. The battery module of claim 5, wherein a second fastening hole is formed in the second end plate, and a second fastening member is provided in the second end plate, and the second end plate and the second end plate are coupled together by coupling the second fastening hole with the second fastening member.

7. The main body frame is a first body frame having an internal space for accommodating the cell assembly and having an open top and both sides; The battery module according to claim 5 , further comprising: a second body frame seated on an upper end of the first body frame.

8. a first recessed portion formed at one end of the first body frame, the first recessed portion being a recessed portion inward; a third recessed portion is formed at one end of the second body frame, the third recessed portion being a recessed portion inward; The battery module of claim 7 , wherein the first recess and the third recess are coupled to the second protrusion in a male-female coupling manner.

9. the second body frame has an extension portion formed by protruding from a center portion of one end thereof, The battery module of claim 8 , wherein the third recess is formed in the extension.

10. At least one second protrusion is formed on each side of the first end plate, The battery module according to claim 9 , wherein the first end plate has a seating base formed by recessing a portion of an upper edge thereof so that the extension portion can be seated thereon.

11. a second recessed portion formed at the other end of the first body frame, the second recessed portion being a recessed portion inward; a fourth recessed portion formed at the other end of the second body frame, the fourth recessed portion being a recessed portion inward; The battery module of claim 7 , wherein the second recess and the fourth recess are coupled to the third protrusion in a male-female manner.

12. The battery module of claim 11 , wherein one or more third protrusions are formed on each side of the second end plate.

13. a first protrusion portion having a partial area protruding upward is formed on an upper end of the first main body frame; a fifth recess formed in a side surface of the second main frame, the fifth recess being a recessed portion inward; The battery module of claim 7 , wherein the first protrusion and the fifth recess are coupled to each other in a male-female coupling manner.

14. The battery module of claim 3 , wherein the bus bar frame includes a first bus bar frame disposed on one side of the cell assembly and a second bus bar frame disposed on the other side of the cell assembly.

15. the first bus bar frame includes a module terminal protruding from one side, The battery module according to claim 14 , wherein the first end plate has a terminal hole formed therein through which the module terminal passes.

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