Battery module and battery pack containing the same

Abstract

A battery module according to one embodiment of the present invention is characterized by comprising: a battery cell stack in which a plurality of battery cells are stacked; a module case for housing the battery cell stack; a busbar frame disposed on one side of the battery cell stack; one or more busbars disposed on the busbar frame; and one or more reinforcing members disposed on the busbar frame.

Description

Technical Field

[0001] The present invention relates to a battery module and a battery pack including the same, and more particularly, to a battery module for reinforcing the rigidity of a bus bar frame and a battery pack including the same.

Background Art

[0002] A secondary battery refers to a battery that can be charged and discharged, unlike a primary battery that cannot be charged, and is applied not only to portable devices but also to electric vehicles (EVs), hybrid electric vehicles (HEVs), etc. driven by an electric drive source.

[0003] Types of secondary batteries currently widely used include lithium-ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel metal hydride batteries, nickel zinc batteries, etc. The operating voltage of such a unit secondary battery cell, that is, a unit battery cell, is about 2.5V to 4.6V. Therefore, when a higher output voltage is required, a large number of battery cells are connected in series to form a battery pack. Also, depending on the charge and discharge capacity required for the battery pack, a large number of battery cells may be connected in parallel to form a battery pack. Therefore, the number of battery cells included in the battery pack can be variously set according to the required output voltage or charge and discharge capacity.

[0004] When a large number of battery cells are connected in series / parallel to form a battery pack, generally, at least one battery cell, preferably a battery module composed of a large number of battery cells, is first formed, and at least one such battery module is used, and other components are added to form a battery pack. Here, a battery module means a component in which a large number of battery cells are connected in series or parallel, and a battery pack means a component in which a large number of battery modules are connected in series or parallel in order to increase the capacity and output, etc.

[0005] A battery module is constructed by electrically connecting multiple cells using busbars, with the electrode leads of the battery cells connected to the busbars.

[0006] In such battery modules, when the electrode leads of the battery cells are connected to the busbars, deformation such as bending may occur in the busbar frame to which the busbars are mounted. [Overview of the project] [Problems that the invention aims to solve]

[0007] The present invention aims to solve the aforementioned problems and to provide a battery module and a battery pack including the same that can reinforce the rigidity of the busbar frame and minimize the deflection of the busbar frame. [Means for solving the problem]

[0008] A battery module according to one embodiment of the present invention is characterized by comprising: a battery cell stack in which a plurality of battery cells are stacked; a module case for housing the battery cell stack; a busbar frame disposed on one side of the battery cell stack; one or more busbars disposed on the busbar frame; and one or more reinforcing members disposed on the busbar frame.

[0009] Furthermore, the busbar frame includes a groove into which the reinforcing member is inserted.

[0010] Furthermore, the groove includes a pair of bent surfaces on both sides that are bent in the direction of the busbar, and the reinforcing member includes a pair of wing-shaped portions that are positioned on the pair of bent surfaces on both sides.

[0011] Furthermore, the busbar frame includes one or more busbar seating portions to which the busbar is connected.

[0012] Furthermore, the reinforcing member is positioned on the busbar seating area.

[0013] Furthermore, the busbar seating portion includes a groove into which the reinforcing member is inserted.

[0014] Furthermore, the groove has a shape that is recessed in the direction of the battery cell stack.

[0015] Furthermore, the bus bar is positioned in front of the reinforcing member at the bus bar seating area.

[0016] Furthermore, the reinforcing member is made of a metal material, preferably a steel plate.

[0017] Furthermore, the busbar is connected to the electrode leads of the battery cell.

[0018] Furthermore, the busbar frames are arranged on both sides of the battery cell stack, and the reinforcing members are arranged on the busbar frames, which are located on both sides of the battery cell stack.

[0019] The system further includes an insulating cover positioned on the outside of the busbar frame.

[0020] The invention further includes an end plate positioned on the outside of the insulating cover. [Effects of the Invention]

[0021] The battery module and pack according to the present invention have the effect of reinforcing the rigidity of the busbar frame and minimizing the deflection of the busbar frame. [Brief explanation of the drawing]

[0022] [Figure 1] This is a perspective view of a battery module according to one embodiment of the present invention. [Figure 2] This is an exploded perspective view of a battery module according to one embodiment of the present invention. [Figure 3]Perspective view of a battery cell according to an embodiment of the present invention. [Figure 4] Perspective view of a terminal bus bar according to an embodiment of the present invention. [Figure 5] Perspective view of an insulating cover and an end plate according to an embodiment of the present invention. [Figure 6] Front view of a bus bar frame according to an embodiment of the present invention. [Figure 7] It is a figure which shows the bus bar frame in the state which removed the bus bar in FIG. 6. [Figure 8] It is a figure which shows the state where a reinforcing member and a bus bar are coupled to a bus bar frame according to an embodiment of the present invention. [Figure 9] Perspective view of a reinforcing member according to an embodiment of the present invention. [Figure 10] Partial cross-sectional view of a bus bar frame according to an embodiment of the present invention. [Figure 11] It is a figure which shows the bending of a bus bar frame. [Figure 12] It is a figure which shows a battery pack according to an embodiment of the present invention. [Figure 13] Perspective view of an automobile with a battery pack mounted thereon according to an embodiment of the present invention.

Mode for Carrying Out the Invention

[0023] The advantages and features of the present invention and the methods for achieving them will become apparent by referring to the embodiments described in detail hereinafter based on the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and can be embodied in various different forms. Merely, these embodiments are provided to complete the disclosure of the present invention and to fully inform those with ordinary knowledge in the technical field to which the present invention pertains of the scope of the invention. The present invention is only defined by the scope of the claims. Therefore, in some embodiments, well-known process steps, well-known element structures, and well-known technologies are not specifically described in order to avoid the present invention being interpreted unclearly. The same reference numerals throughout the specification indicate the same components.

[0024] To clearly represent many layers and regions in drawings, thickness may be shown enlarged. Similar parts throughout the specification are given the same drawing reference numerals. When a layer, film, region, plate, or other part is said to be "on top" of another part, this includes not only when it is "directly above" the other part, but also when there is another part in between. Conversely, when a part is said to be "directly above" another part, it means there is no other part in between. Similarly, when a layer, film, region, plate, or other part is said to be "below" another part, this includes not only when it is "directly below" the other part, but also when there is another part in between. Conversely, when a part is said to be "directly below" another part, it means there is no other part in between.

[0025] A battery module 1000 according to one embodiment of the present invention will be described in detail with reference to the attached drawings. Figure 1 is a perspective view of the battery module according to the present invention, Figure 2 is an exploded perspective view of the battery module according to the present invention, Figure 3 is a perspective view of the battery cell according to the present invention, Figure 4 is a perspective view of the terminal busbar according to the present invention, Figure 5 is a perspective view of the insulating cover and end plate according to the present invention, Figure 6 is a front view of the busbar frame according to one embodiment of the present invention, Figure 7 shows the busbar frame with the busbar removed from Figure 6, Figure 8 shows the busbar frame according to one embodiment of the present invention with the reinforcing member and busbar connected, Figure 9 is a perspective view of the reinforcing member according to one embodiment of the present invention, Figure 10 is a partial cross-sectional view of the busbar frame according to one embodiment of the present invention, and Figure 11 shows the deflection of the busbar frame.

[0026] A battery module 1000 according to one embodiment of the present invention may include a battery cell stack 100 in which a plurality of battery cells 110 are stacked, a module case 200 that houses the battery cell stack 100, a busbar frame 300 located on one and / or the other surface of the battery cell stack 100, an insulating cover 500 disposed on the outside of the busbar frame 300, and an end plate 400 disposed on the outside of the insulating cover 500.

[0027] The battery cell stack 100 consists of multiple battery cells 110 stacked in one direction, and the multiple battery cells 110 can be electrically connected. The direction in which the multiple battery cells 110 are stacked may be the X-axis direction (or the X-axis direction) in Figure 5.

[0028] The direction from the front to the rear of the battery cell stack 100, or the opposite direction, can be defined as the longitudinal direction of the battery cell stack 100, and may be the Y-axis direction on the drawing. Furthermore, the direction from the top to the bottom of the battery cell stack 100, or the opposite direction, can be defined as the width direction of the battery cell stack 100, and may be the Z-axis direction on the drawing.

[0029] The longitudinal direction of the battery cell stack 100 may be substantially the same as the longitudinal direction of the battery cells 110. The electrode leads 111 and 112 of the battery cells 110 are located on the front and rear surfaces of the battery cell stack 100, and the busbars 310 and 320 of the battery module 1000 may be positioned close to the front and rear surfaces of the battery cell stack 100 to facilitate electrical connection with the electrode leads 111 and 112.

[0030] The battery cell 110 is supplied as a pouch-type battery cell, which allows for the maximum number of cells stacked per unit area. However, the battery cell 110 does not necessarily have to be supplied as a pouch type; it can also be supplied in prismatic, cylindrical, or other various forms.

[0031] The battery cell 110, provided in a pouch, may include an electrode assembly and a cell case 115 that houses the electrode assembly (see Figure 3).

[0032] The cell case 115 of the battery cell 110 is for housing the electrode assembly and may be a pouch-type cell case 115. The cell case 115 includes a lower case and an upper case that covers the lower case, and the upper and lower cases may be integrated. Also, as shown in Figure 4, the connecting portion of the upper and lower cases may be folded. Furthermore, as shown in the figure, the upper case may completely cover the lower case, and a sealing portion 114 may be formed around the periphery.

[0033] Both the upper and lower cases can be laminate structures including an internal coating layer, a metal layer, and an external coating layer. The internal coating layer is located inside the cell case 115 relative to the metal layer and is in direct contact with the electrode assembly. Therefore, it must have insulating and electrolytic resistance properties, and for sealing to the outside, it is required to have sealing properties, i.e., the sealing portions where the internal layers are heat-bonded together must have excellent thermal bonding strength. The metal layer is located between the internal and external coating layers and acts as a barrier layer that prevents moisture and various gases from penetrating into the inside of the battery from the outside. A suitable material for the metal layer in contact with the internal coating layer is a thin film of aluminum (Al) which is lightweight yet has excellent moldability. The external coating layer is located outside the cell case 115 relative to the metal layer. Such an external coating layer can use a heat-resistant polymer with excellent tensile strength, moisture permeability prevention, and air permeability prevention properties so as to protect the electrode assembly while ensuring heat resistance and fire resistance. For example, nylon or polyethylene terephthalate can be used.

[0034] Each of the upper and lower cases has a housing groove 116, and the electrode assembly can be housed in the housing groove 116 of the upper and lower cases.

[0035] The electrode assembly housed in the cell case 115 may be one selected from the group consisting of a jelly roll type electrode assembly having a structure in which a separation membrane is interposed between a long sheet-like negative electrode and a positive electrode before it is wound up, a stack type electrode assembly consisting of unit cells having a structure in which rectangular positive and negative electrodes are stacked with a separation membrane in between, a stack-folding type electrode assembly in which the unit cells are wound up by a long separation film, and a lamination-stack type electrode assembly in which the unit cells are stacked with a separation membrane in between and adhere to each other.

[0036] The electrode assembly may also include two electrode tabs and two electrode leads 111 and 112 connected to these electrode tabs by welds.

[0037] One of the two electrode leads 111, 112 is a positive lead connected to a positive tab, and the other electrode lead 111, 112 may be a negative lead connected to a negative tab.

[0038] A lead film 113 can be attached to each of the electrode leads 111 and 112. The lead film 113 attached to the electrode leads 111 and 112 is located between the electrode leads 111 and 112 and the cell case 115, preventing short circuits from occurring between the electrode leads 111 and 112 and the cell case 115, improving the sealing force and preventing leakage of the electrolyte.

[0039] Although the two electrode leads 111 and 112 are shown positioned on both sides of the electrode assembly, they may be positioned on only one side of the electrode assembly depending on the arrangement of the electrode tabs.

[0040] The module case 200 is intended to protect the battery cell stack 100 and the electrical components connected thereto from external physical shocks, and the module case 200 can house the battery cell stack 100 and the electrical components connected thereto in the internal space of the module case 200.

[0041] The structure of the module case 200 is diverse. As an example, the module case 200 may have a monoframe structure. Here, the monoframe may have the form of a metal sheet material with an integrated top surface, bottom surface, and both sides. The monoframe can be manufactured by extrusion molding. As another example, the structure of the module case 200 may be a structure in which a U-shaped frame and an upper plate (top surface 201) are joined. In the case of a structure in which a U-shaped frame and an upper plate are joined, the structure of the module case 200 is formed by joining the upper plate to the upper side of a U-shaped frame which is a metal sheet material with an integrated bottom surface and both sides, and each frame or plate can be manufactured by press molding. Furthermore, in addition to the monoframe or U-shaped frame, the structure of the module case 200 can also be provided as an L-shaped frame structure, and can be provided as a variety of structures not described in the examples above.

[0042] The structure of the module case 200 may be provided in a form that is open in the longitudinal direction of the battery cell stack 100. The front and rear surfaces of the battery cell stack 100 do not need to be shielded by the module case 200. The electrode leads 111 and 112 of the battery cells 110 do not need to be shielded by the module case 200. The front and rear surfaces of the battery cell stack 100 can be shielded by a busbar frame 300, end plate 400, or busbars 310, 320, etc., which will be described later, thereby protecting the front and rear surfaces of the battery cell stack 100 from external physical impacts, etc.

[0043] A compression pad 150 may be positioned between the battery cell stack 100 and one of the inner surfaces of the module case 200.

[0044] The compression pad 150 may be positioned in the battery cell stack 100 so as to face the battery cell 110 located on the outermost edge of the battery cell stack 100 in the X-axis direction in the drawing.

[0045] Furthermore, although not shown in the figures, a thermally conductive resin is injected between the battery cell stack 100 and the inner surface of the module case 200, and a thermally conductive resin layer (not shown) may be formed between the battery cell stack 100 and one of the inner surfaces of the module case 200 by the injected thermally conductive resin. Here, the thermally conductive resin layer is located on the Z-axis of the battery cell stack 100, and the thermally conductive resin layer may be formed between the battery cell stack 100 and the bottom surface of the module case 200 located on the -Z-axis.

[0046] The busbar frame 300 is positioned on one surface of the battery cell stack 100, covering one surface of the battery cell stack 100 and guiding the connection between the battery cell stack 100 and external equipment. Specifically, as shown in the figure, the busbar frame 300 can be positioned on the front or rear surface of the battery cell stack 100, or it can be positioned on the top, bottom, or side surface. At least one of the busbars 310, 320, and module connectors can be mounted on the busbar frame 300. As shown in Figure 5, one surface of the busbar frame 300 is connected to one or the other surface of the battery cell stack 100, and the other surface of the busbar frame 300 can be connected to the busbars 310, 320.

[0047] The busbar frame 300 may include one or more busbar seating sections 340 on which the busbars 310 and 320 are joined and seated.

[0048] Busbars 310 and 320 can be seated on the front of the busbar seating portion 340 of the busbar frame 300, and multiple busbar seating portions 340 can be arranged spaced apart in the width direction of the battery module 1000.

[0049] The busbar frame 300 may include an electrically insulating material and may consist of a plastic injection molded product. The busbar frame 300 can limit the contact of the busbars 310 and 320 with other parts of the battery cell 110 other than the parts joined to the electrode leads 111 and 112, thereby preventing electrical short circuits from occurring.

[0050] The busbar frame 300 may be located on one side and the other side of the battery cell stack 100, respectively.

[0051] The busbars 310 and 320 are mounted on the busbar seating portion 340 on one surface of the busbar frame 300, and the busbars 310 and 320 may be used to electrically connect the battery cell stack 100 or the battery cells 110 to external equipment circuits. Multiple busbars 310 and 320 are arranged and positioned between the battery cell stack 100 or the busbar frame 300 and the end plates 400 and 450, thereby protecting them from external impacts and minimizing the reduction in durability due to external moisture.

[0052] The busbars 310 and 320 can be electrically connected to the battery cell stack 100 via the electrode leads 111 and 112 of the battery cell 110.

[0053] Specifically, the electrode leads 111 and 112 of the battery cell 110 can pass through lead slits formed in the busbar frame 300, then bend and connect to the busbars 310 and 320. The electrode leads 111 and 112 of the battery cell 110 are connected to both sides of the busbars 310 and 320, with electrode lead 111 connected to one side of the busbars 310 and 320 being the positive electrode lead, and electrode lead 112 connected to the other side of the busbars 310 and 320 being the negative electrode lead.

[0054] The busbars 310 and 320 allow the battery cells 110 constituting the battery cell stack 100 to be connected in series or in parallel.

[0055] The busbars 310 and 320 may include a terminal busbar 320 for electrically connecting one battery module 1000 to another battery module 1000. To connect with another battery module 1000, at least a portion of the terminal busbar 320 is exposed to the outside of the end plate 400, which may have a terminal opening 410 for this purpose.

[0056] One end (second portion 322) of the terminal busbar 320 can be exposed through the opening 510 of the insulating cover 500 and the terminal opening 410 of the end plate 400.

[0057] As shown in Figure 4, the terminal busbar 320 may include a first portion 321 connected to the electrode leads 111 and 112 of the battery cell 110, and a second portion 322 exposed to the outside through the terminal opening 410. The terminal busbar 320 may further include a bending portion 323 formed between the first portion 321 and the second portion 322.

[0058] In the terminal busbar 320, the first portion 321 is connected to the second portion 322 via a bending portion 323, and one surface of the first portion 321 and one surface of the second portion 322 may be perpendicular to each other. That is, by forming a curved bending portion 323 in the terminal busbar 320, the second portion 322 protrudes and sits on the seating portion 530 of the insulating cover 500, and the second portion 322 can be electrically connected to an interbusbar (not shown). A coupling hole 322a is formed in the second portion 322 that constitutes one end of the terminal busbar 320, and the second portion 322 of the terminal busbar 320 is fixed by a fixing pin (not shown) inserted into this coupling hole 322a.

[0059] On the other hand, as shown in Figures 6 to 10, the busbar frame 300 may further include one or more reinforcing members 350.

[0060] The reinforcing member 350 is intended to reinforce the rigidity of the busbar frame 300 and can extend vertically and be connected to the busbar frame 300, as shown in Figures 7 to 9.

[0061] In one embodiment of the present invention, the reinforcing member 350 may include a central portion 351 and a pair of wing portions 352 bent forward from both sides of the central portion 351, and the central portion 351 and the wing portions 352 may be formed integrally.

[0062] The central section 351 extends vertically in a flat plate shape, and its height (H) can be made much larger than its width.

[0063] A pair of wing sections 352 may be formed by folding forward from both ends of the central section 351. The angle at which the pair of wing sections 352 are folded from the central section 351 is acute, and the folding angles on the left and right sides may differ. Figure 10 shows an example where the folding angle of the right wing section 352 is larger than that of the left wing section 352.

[0064] The height (H) of the reinforcing member 350 may be smaller than that of the busbar frame 300 and may be approximately the same as the vertical length of the busbars 310 and 320.

[0065] The reinforcing member 350 can be made of a metal material, and for example, it may be made of a steel plate. Figure 8 shows an example in which two reinforcing members 350 are connected to the busbar frame 300, but the number of reinforcing members 350 can be changed.

[0066] In the busbar frame 300, the reinforcing member 350 can be coupled to the busbar seating portion 340. Specifically, the busbar seating portion 340 may include an inwardly recessed groove 341, to which the reinforcing member 350 can be coupled. The groove 341 may be formed in a recessed shape toward the battery cell stack 100 and to correspond to the reinforcing member 350. In this embodiment, the groove 341 may include a central portion 341a and a pair of bent surface portions 341b located on both sides of the central portion 341a.

[0067] In the groove 341, the central portion 341a extends perpendicularly to the planar shape and can correspond to the central portion 351 of the reinforcing member 350. Therefore, the central portion 351 of the reinforcing member 350 can be positioned in contact with the central portion 341a of the groove 341.

[0068] The pair of bent surfaces 341b are formed by bending forward from both ends of the central portion 341a (in the direction of the busbars 310 and 320), so that the bent surfaces 341b can form an inclined surface with respect to the central portion 341a. The pair of wing portions 352 of the reinforcing member 350 can be positioned in contact with the pair of bent surfaces 341b.

[0069] As another example, the groove 341 may be configured such that a pair of bent surfaces 341b are connected to each other without a central portion 341a. In this case, the reinforcing member 350 may be configured such that a pair of wing portions 352 are connected to each other without a central portion 351 (left reinforcing member 350 in Figure 8) to correspond to such a groove 341.

[0070] In this way, the groove 341 of the busbar seating portion 340 is formed to correspond to the reinforcing member 350, the reinforcing member 350 is tightly bonded to the groove 341, and the busbars 310 and 320 can be positioned in front of the reinforcing member 350 on the busbar seating portion 340. That is, the busbars 310 and 320 can cover the reinforcing member 350 in front of it.

[0071] Such reinforcing members 350 can be connected to the busbar frame 300 to improve the rigidity of the busbar frame 300, thereby minimizing the deflection of the busbar frame 300.

[0072] In this embodiment, Figure 7 shows an example in which two reinforcing members 350 are connected to the busbar frame 300, but the reinforcing members 350 may be connected to all busbar seating portions 340 where the busbars 310 and 320 are located.

[0073] Figure 11 shows the deflection of the busbar frame 300 when the electrode leads 111 and 112 of the battery cell 110 are connected to the busbars 310 and 320.

[0074] The electrode leads 111 and 112 of the battery cell 110 can be welded to the busbars 310 and 320. At this time, a pressing force can be applied using a jig (not shown) to ensure that the electrode leads 111 and 112 of the battery cell 110 are tightly attached to the busbars 310 and 320.

[0075] Here, welding can be performed on the busbar frame 300, which is a plastic injection molded product, while it is deformed by bending force. Even after the pressing force is removed, the shape of the busbar frame 300 does not return to its original state due to the constraint relationship with the electrode leads 111 and 112, or even if it does, tensile force can be applied to the electrode leads 111 and 112.

[0076] As shown in Figure 11, the busbar frame 300 may deform in the width direction or the height direction. Figure 11(a) shows the deflection of the busbar frame 300 in the width direction (dotted line portion), and Figure 11(b) shows the deflection of the busbar frame 300 in the height direction (dotted line portion).

[0077] In one embodiment of the present invention, as described above, the rigidity of the busbar frame 300 can be improved by connecting the reinforcing member 350 to the busbar frame 300, and the deflection of such a busbar frame 300 can be minimized. Furthermore, the deformation of the busbar frame 300 can be minimized during the welding process with the electrode leads 111 and 112, thereby eliminating the possibility of tension occurring in the electrode leads 111 and 112 within the battery cell stack 100.

[0078] The end plate 400 may be intended to protect the battery cell stack 100 and the electrical components connected thereto from external physical shocks by sealing the open surface of the module case 200. For this purpose, the end plate 400 can be manufactured from a material having a predetermined strength, and for example, the end plate 400 may include a metal such as aluminum or a plastic material.

[0079] Terminal openings 410 may be formed in the end plate 400. The terminal openings 410 are located on both sides of the end plate 400, and a portion of the insulating cover 500 and one end (second portion 322) of the terminal bus bar 320 may be exposed through the terminal openings 410.

[0080] Furthermore, a connector opening is located between the terminal openings 410 on both sides of the end plate 400, allowing the module connector to be exposed to the outside through the connector opening.

[0081] The end plate 400 can be connected to the module case 200 while covering the busbar frame 300 or busbars 310, 320 located on one surface of the battery cell stack 100. Each corner of the end plate 400 can be connected to the corresponding corner of the module case 200 by methods such as welding, bolting, or hooking.

[0082] The end plates 400 can be positioned on one side and the other side of the module case 200 so as to cover both sides of the battery cell stack 100. In this embodiment, an example is shown in which the end plates 400 are positioned on the front and rear sides of the module case 200.

[0083] Furthermore, an insulating cover 500 for electrical insulation may be positioned between the end plate 400 and the busbar frame 300. That is, the busbar frame 300, insulating cover 500, and end plate 400 may be positioned sequentially outward from the battery cell stack 100. Similar to the end plate 400, the busbar frame 300 and insulating cover 500 may each be composed of multiple units.

[0084] The insulating cover 500 may include an electrically insulating material that can prevent the busbars 310 and 320 from coming into contact with the end plate 400.

[0085] The insulating cover 500 may include openings 510 and seating portions 530. The openings 510 are located on both sides of the upper part of the insulating cover 500, and one end (second portion 322) of the terminal bus bar 320 may be exposed through the openings 510.

[0086] Furthermore, a connector opening is located between the openings 510 on both sides of the insulating cover 500, through which the module connector can be exposed to the outside.

[0087] The insulating cover 500 is located on the inner surface of the end plate 400 and can be in close contact with the inner surface of the end plate 400, but is not necessarily limited to that.

[0088] As described above, one end (second portion 322) of the terminal bus bar 320 is exposed through the opening 510, and this exposed end (second portion 322) of the terminal bus bar 320 can be seated on the seating portion 530. Therefore, the seating portion 530 can be positioned adjacent to the opening 510 and on the upper outer surface.

[0089] The second portion 322 of the terminal bus bar 320 can rest on the upper surface of the seating portion 530, thereby forming a seating surface on the upper surface of the seating portion 530. Furthermore, as shown in Figure 5, the seating portion 530 may include a fixing member 531 for fixing the terminal bus bar 320.

[0090] The fixing member 531 can fix the second portion 322 of the terminal bus bar 320 and may include a fixing hole 531a.

[0091] A fixing pin (not shown) can be inserted into the fixing hole 531a. The fixing pin (not shown), which is inserted into the coupling hole 322a formed in the second portion 322 of the terminal bus bar 320, is coupled to the fixing hole 531a and fixed, thereby fixing the second portion 322 of the terminal bus bar 320 to the insulating cover 500.

[0092] Therefore, the second portion 322 of the terminal bus bar 320 sits on the seating portion 530 of the insulating cover 500, and the second portion 322 sits on and in contact with the fixing member 531 positioned on the seating portion 530.

[0093] Furthermore, a terminal cover portion (not shown) that covers one end (second portion 322) of the exposed terminal bus bar 320 may be placed on the insulating cover 500.

[0094] On the other hand, electrical connections between battery modules 1000 may be made via an interbus bar (not shown). An interbus bar is a component for connecting one battery module 1000 to another adjacent battery module 1000 or BDU (Battery Disconnection Unit), and may be connected to an exposed end (second portion 322) of a terminal bus bar 320. As an example, an interbus bar may be connected overlapping the upper part of one end (second portion 322) of the terminal bus bar 320.

[0095] After one end of the interbusbar is positioned overlapping the second portion 322 of the terminal busbar 320, the fixing pins are sequentially inserted into the coupling holes of the interbusbar and the coupling holes 322a of the second portion 322 of the terminal busbar 320. The fixing pins are then fixed to the fixing holes 531a of the seating portion 530, thereby connecting the interbusbar to the terminal busbar 320.

[0096] Furthermore, the fixing pins allow the second portion 322 of the terminal busbar 320 to be secured to the insulating cover 500 together with the interbusbar.

[0097] As described above, one or more battery modules 1000 according to the present invention can form a battery pack 2000. As shown in Figure 12, a battery pack 2000 according to one embodiment of the present invention can house at least one or more battery modules 1000 inside a pack case 2100 and can include various control and protection systems such as a BMS (Battery Management System) and a cooling system.

[0098] The pack case 2100 may include a lower housing 2110 and an upper housing (not shown) coupled to the upper side of the lower housing 2110, and can accommodate multiple battery modules 1000 in the internal space of the lower housing 2110 and the upper housing.

[0099] On the other hand, while the embodiment of the present invention shows an example in which multiple battery modules 1000 are housed inside the battery pack 2000, multiple battery cells 110 can be immediately placed inside the battery pack 2000.

[0100] The battery module 1000 and battery pack 2000 according to the present invention, configured in this manner, can be applied to a variety of devices. Specifically, they can be applied to means of transportation such as electric bicycles, electric vehicles, and hybrid vehicles, as well as to ESS (Energy Storage Systems), but are not limited to these, and can be applied to a variety of devices that can use secondary batteries.

[0101] Figure 13 shows an electric vehicle V equipped with a battery pack 2000. The electric vehicle V can be operated by a motor that receives power from the battery pack 2000 to drive the wheels.

[0102] As described above, the present invention has been described based on preferred embodiments, but is not limited to the embodiments described above, and various modifications and alterations are possible by those skilled in the art to which the present invention pertains, without departing from the spirit of the invention. [Industrial applicability]

[0103] The present invention can provide a battery module and pack that can reinforce the rigidity of the busbar frame and minimize the deflection of the busbar frame. [Explanation of symbols]

[0104] 100 Battery Cell Stack 110 battery cells 111, 112 electrode leads 113 Lead film 114 Sealing section 115 Cell Case 116 Retaining groove 150 Compression Pads 200 Module Case 201 Top surface 300 Busbar Frame 310, 320 busbar 321 Part 1 322 Part 2 322a Binding hole 323 Bending section 340 Busbar seating area 341 Groove 341a central part 341b Bent surface part 350 Reinforcement member 351 Central part 352 Wings 400 End Plate 410 Terminal entrance 450 End Plate 500 Insulating Cover 510 Opening 530 Seating area 531 Fixing member 531a Fixed Hole 1000 Battery Modules 2000 Battery Pack 2100 pack case 2110 Lower Housing

Claims

1. A battery cell stack in which multiple battery cells are stacked, A module case for housing the aforementioned battery cell stack, A busbar frame arranged on one side of the aforementioned battery cell stack, One or more busbars arranged in the busbar frame, One or more reinforcing members arranged on the busbar frame, A battery module, including the battery module.

2. The battery module according to claim 1, wherein the busbar frame includes a groove into which the reinforcing member is inserted.

3. The groove includes a pair of bent surfaces on both sides that are bent in the direction of the busbar, The battery module according to claim 2, wherein the reinforcing member includes a pair of wing portions arranged on both sides of the pair of bent surfaces.

4. The battery module according to claim 1, wherein the busbar frame includes one or more busbar seating portions to which the busbar is connected.

5. The battery module according to claim 4, wherein the reinforcing member is arranged on the busbar seating portion.

6. The battery module according to claim 5, wherein the busbar seating portion includes a groove into which the reinforcing member is inserted.

7. The battery module according to claim 6, wherein the groove has a shape that is recessed in the direction of the battery cell stack.

8. The battery module according to claim 4, wherein the bus bar is positioned in front of the reinforcing member at the bus bar seating portion.

9. The battery module according to claim 1, wherein the reinforcing member is made of a metal material.

10. The battery module according to claim 1, wherein the reinforcing member is made of a steel plate.

11. The battery module according to claim 1, wherein the busbar is connected to the electrode leads of the battery cell.

12. The busbar frames are arranged on both sides of the battery cell stack. The battery module according to claim 1, wherein the reinforcing members are each arranged on the busbar frames which are arranged on both sides of the battery cell stack.

13. The battery module according to claim 1, further comprising an insulating cover positioned outside the busbar frame.

14. The battery module according to claim 13, further comprising an end plate positioned on the outside of the insulating cover.

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