Battery module and battery pack including the same

Abstract

A battery module according to an embodiment of the present invention includes a battery cell stack in which a plurality of battery cells are stacked, a module case for accommodating the battery cell stack, a bus bar frame disposed on one side of the battery cell stack, an insulating cover disposed on an outer side of the bus bar frame, and a pressure pad disposed on an inner side of the insulating cover for applying pressure to the bus bar 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 in which hole position accuracy of a terminal bus bar is improved, and a battery pack including the same. [Background technology]

[0002] Secondary batteries are batteries that can be charged and discharged, unlike primary batteries which cannot be recharged. They are used not only in portable devices but also in electric vehicles (EVs) and hybrid electric vehicles (HEVs) that are powered by electrical sources.

[0003] Currently widely used types of secondary batteries include lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel metal hydride batteries, and nickel zinc batteries. The operating voltage of such unit secondary battery cells, i.e., unit battery cells, is approximately 2.5V to 4.6V. Therefore, when a higher output voltage is required, a battery pack is constructed by connecting multiple battery cells in series. Alternatively, depending on the charge / discharge capacity required for the battery pack, multiple battery cells may be connected in parallel to construct the battery pack. Therefore, the number of battery cells included in the battery pack can be variously set depending on the required output voltage or charge / discharge capacity.

[0004] When a battery pack is constructed by connecting a plurality of battery cells in series / parallel, a common method is to first construct a battery module including at least one battery cell, preferably a plurality of battery cells, and then construct the battery pack using at least one such battery module and adding other components. Here, the term "battery module" refers to a component in which a plurality of battery cells are connected in series or parallel, and the term "battery pack" refers to a component in which a plurality of battery modules are connected in series or parallel to increase capacity and output.

[0005] In a battery module, a cell block consisting of a number of battery cells may move within a gap between the cell block and the module frame. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a battery module and a battery pack including the same that can restrict the position of a cell block and improve the positional accuracy of a terminal hole. [Means for solving the problem]

[0007] A battery module according to the present invention includes a battery cell stack in which a plurality of battery cells are stacked, a module case for accommodating the battery cell stack, a bus bar frame disposed on one side of the battery cell stack, an insulating cover disposed on the outside of the bus bar frame, and a pressure pad disposed on the inside of the insulating cover for applying pressure to the bus bar frame.

[0008] The pressure pad is disposed on the inner surface extending from the insulating cover toward the bus bar frame.

[0009] The pressure pad is attached to the inside of the insulating cover.

[0010] The pressure pad is also compressible.

[0011] The pressure pad is made of a foam pad.

[0012] A plurality of the pressure pads are disposed inside the insulating cover.

[0013] The electric power train further includes a plurality of bus bars disposed on the bus bar frame.

[0014] The end of the pressure pad is disposed between the bus bars.

[0015] The bus bar frame further includes ribs disposed between the bus bars.

[0016] The pressure pad also applies pressure to the rib.

[0017] In addition, the bus bar frames are arranged on both sides of the battery cell stack, the insulating covers are arranged on both sides of the module case, and the pressure pads are arranged on the insulating covers arranged on both sides of the module case.

[0018] The pressure pad extends vertically from the inside of the insulating cover.

[0019] The connector further includes a terminal bus bar disposed on the bus bar frame, and a fixing member having a fixing hole for fixing one end of the terminal bus bar, the fixing member being disposed below the one end of the terminal bus bar from the insulating cover.

[0020] The housing further includes an end plate disposed outside the insulating cover.

[0021] The insulating covers are disposed on both sides of the module case, and the end plates are disposed on both sides of the module case from the outside of the insulating covers. [Effects of the Invention]

[0022] The battery module and pack according to the present invention have the effect of improving the hole position accuracy of the terminal bus bar by constraining the position of the cell block and arranging the cell block in the correct position within the module. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a perspective view showing a battery module according to the present invention; [Figure 2] 1 is an exploded perspective view showing a battery module according to the present invention; [Figure 3] FIG. 1 is a perspective view showing a battery cell according to the present invention. [Figure 4] FIG. 2 is a perspective view showing a terminal bus bar according to the present invention. [Figure 5] FIG. 2 is a perspective view showing an insulating cover and an end plate according to the present invention. [Figure 6] FIG. 2 is a perspective view showing an insulating cover according to the present invention. [Figure 7] 10 is a view showing a state in which an insulating cover and an end plate are attached to both sides of a battery cell stack in accordance with the present invention; FIG. [Figure 8] 10 is a diagram showing a state in which an insulating cover is joined to a bus bar frame in the present invention. FIG. [Figure 9] FIG. 10 is a diagram showing the state in which the holes of the terminal bus bar are correctly positioned in the present invention. [Figure 10] 1 is a diagram showing a battery pack according to an embodiment of the present invention. [Figure 11] 1 is a perspective view showing a vehicle equipped with a battery pack according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0024] The advantages, features, and methods of achieving the present invention will become more apparent with reference to the following detailed embodiments, which are illustrated in the accompanying drawings. However, the present invention is not limited to the following embodiments, and may be implemented in various different forms. These embodiments are provided to fully disclose the present invention and to fully convey the scope of the invention to those skilled in the art. The present invention is defined by the scope of the claims. Therefore, in some embodiments, well-known processes, well-known device structures, and well-known techniques are not specifically described to avoid ambiguous interpretation of the present invention. The same reference numerals refer to the same components throughout the specification.

[0025] In the figures, the thickness of various layers and regions is exaggerated to clearly show them. Similar parts are designated by the same reference numerals throughout the specification. When a layer, film, region, plate, etc. is "on" another part, it means not only that it is "directly on" the other part, but also that there is another part between them. Conversely, when a part is "directly on" another part, it means that there is no other part between them. When a layer, film, region, plate, etc. is "under" another part, it means not only that it is "directly below" the other part, but also that there is another part between them. Conversely, when a part is "directly below" the other part, it means that there is no other part between them.

[0026] A battery module 1000 according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0027] FIG. 1 is a perspective view of a battery module according to the present invention, FIG. 2 is an exploded perspective view of a battery module according to the present invention, FIG. 3 is a perspective view of a battery cell according to the present invention, FIG. 4 is a perspective view of a terminal bus bar according to the present invention, FIG. 5 is a perspective view of an insulating cover and end plates according to the present invention, FIG. 6 is a perspective view of an insulating cover according to the present invention, FIG. 7 is a diagram showing an insulating cover and end plates attached to both sides of a battery cell stack according to the present invention, FIG. 8 is a diagram showing an insulating cover attached to a bus bar frame according to the present invention, and FIG. 9 is a diagram showing a terminal bus bar hole correctly positioned according to the present invention.

[0028] 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 bus bar frame 300 located on one side and / or the other side of the battery cell stack 100, an insulating cover 500 arranged on the outside of the bus bar frame 300, and an end plate 400 arranged on the outside of the insulating cover.

[0029] The battery cell stack 100 has a plurality of battery cells 110 stacked in one direction, and the plurality of battery cells 110 are electrically connectable. The direction in which the plurality of battery cells 110 are stacked may be the X-axis direction (or the −X-axis direction) in FIG. 2.

[0030] The direction from the front surface to the rear surface of the battery cell stack 100 or the opposite direction is defined as the length direction of the battery cell stack 100, which may be the Y-axis direction in the drawing. The direction from the top surface to the bottom surface of the battery cell stack 100 or the opposite direction is defined as the width direction of the battery cell stack 100, which may be the Z-axis direction in the drawing.

[0031] The length direction of the battery cell stack 100 may be substantially the same as the length direction of the battery cells 110. The electrode leads 111, 112 of the battery cells 110 are located on the front and rear surfaces of the battery cell stack 100, and the bus bars 310, 320 of the battery module 1000 may be disposed near the front and rear surfaces of the battery cell stack 100 so as to easily form electrical connections with the electrode leads 111, 112.

[0032] The battery cells 110 may be pouch-type battery cells, which allows for maximizing the number of stacked cells per unit area. However, the battery cells 110 do not have to be pouch-type, and may be rectangular, cylindrical, or have various other shapes.

[0033] The pouch-type battery cell 110 can include an electrode assembly and a cell case 115 that houses the electrode assembly (see FIG. 3).

[0034] 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 covering the lower case, and the upper and lower cases may be integral. Also, as shown in FIG. 3, the connecting portion of the upper and lower cases may be folded to form a folding structure. Also, as shown, the upper case may completely cover the lower case, with a sealing portion 114 formed around the periphery.

[0035] Both the upper and lower cases may have a laminate structure including an inner coating layer, a metal layer, and an outer coating layer. The inner coating layer is located inside the cell case 115 relative to the metal layer and is in direct contact with the electrode assembly, so it must be insulating and electrolytic-resistant. Furthermore, the sealing properties, i.e., the sealing portion where the inner layers are thermally bonded together, must have excellent thermal adhesive strength to seal the battery from the outside. The metal layer is located between the inner and outer coating layers and serves as a barrier layer to prevent moisture and various gases from penetrating into the battery from the outside. A preferred material for the metal layer in contact with the inner coating layer is an aluminum (Al) thin film, which is lightweight and has excellent formability. The outer coating layer is located outside the cell case 115 relative to the metal layer. For this outer coating layer, a heat-resistant polymer with excellent tensile strength, moisture permeability, waterproofness, and air permeability barrier properties can be used to protect the electrode assembly while ensuring heat resistance and chemical resistance. Examples of such materials include nylon or polyethylene terephthalate.

[0036] The upper and lower cases each have a receiving groove 116 formed therein, and the electrode assembly is received in the receiving groove 116 of the upper and lower cases.

[0037] 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 separator is interposed between long sheet-shaped anodes and cathodes and then wound up; a stack type electrode assembly composed of unit cells having a structure in which rectangular anodes and cathodes are stacked with a separator interposed between them; a stack folding type electrode assembly in which unit cells are wound up with a long separating film; and a lamination stack type electrode assembly in which unit cells are stacked with a separator interposed between them and then attached to each other.

[0038] The electrode assembly also includes two electrode tabs and two electrode leads 111 and 112 connected to the electrode tabs by welding, respectively.

[0039] One of the two electrode leads 111, 112 may be an anode lead connected to an anode tab, and the other electrode lead 111, 112 may be a cathode lead connected to a cathode tab.

[0040] A lead film 113 may be attached to each of the electrode leads 111 and 112. The lead film 113 connected to the electrode leads 111 and 112 is located between the electrode leads 111 and 112 and the cell case 115, and prevents short circuits from occurring between the electrode leads 111 and 112 and the cell case 115, and improves sealing strength to prevent electrolyte leakage, etc.

[0041] Although the two electrode leads 111 and 112 are shown disposed on both sides of the electrode assembly, they may be disposed on only one side of the electrode assembly depending on the arrangement of the electrode tabs.

[0042] The module case 200 is intended to protect the battery cell stack 100 and the electrical components connected thereto from external physical impacts, and the module case 200 can accommodate the battery cell stack 100 and the electrical components connected thereto in the internal space of the module case 200.

[0043] The module case 200 may have various structures. For example, the module case 200 may have a monoframe structure. Here, the monoframe may be in the form of a metal plate with an integrated top, bottom, and both side surfaces. The monoframe may be manufactured by extrusion molding. As another example, the module case 200 may have a structure in which a U-shaped frame and an upper plate (upper surface 201) are coupled together. In the case of a structure in which a U-shaped frame and an upper plate are coupled together, the module case 200 may be formed by coupling the upper plate to the top of the U-shaped frame, which is a metal plate with an integrated bottom and both side surfaces, and each frame or plate may be manufactured by press molding. Furthermore, the module case 200 may have a monoframe or U-shaped frame structure, or an L-shaped frame structure, or various other structures not described above.

[0044] The module case 200 may have a structure that is open along the length direction of the battery cell stack 100. The front and rear surfaces of the battery cell stack 100 do not have to be hidden by the module case 200. The electrode leads 111, 112 of the battery cells 110 do not have to be hidden by the module case 200. The front and rear surfaces of the battery cell stack 100 may be hidden by a bus bar frame 300, an end plate 400, or bus bars 310, 320, which will be described later, and thereby the front and rear surfaces of the battery cell stack 100 are protected from external physical impacts, etc.

[0045] A compression pad 150 may be positioned between the battery cell stack 100 and one side of the inner surface of the module case 200 .

[0046] The compression pad 150 may be disposed in the battery cell stack 100 so as to face the battery cell 110 located at the outermost edge of the battery cell stack 100 in the X-axis direction in the drawing.

[0047] Furthermore, although not shown, a thermally conductive resin may be injected between the battery cell stack 100 and the inner surface of the module case 200, and the injected thermally conductive resin forms a thermally conductive resin layer (not shown) between the battery cell stack 100 and one side of the inner surface of the module case 200. In this case, the thermally conductive resin layer may be 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.

[0048] The bus bar frame 300 is positioned on one side of the battery cell stack 100 to cover that side and guide the connection between the battery cell stack 100 and an external device. Specifically, the bus bar frame 300 may be positioned on the front or rear side of the battery cell stack 100 as shown in the figure, or on the top, bottom, or side. At least one of bus bars 310, 320 and a module connector is attached to the bus bar frame 300. As shown in FIG. 2 , one side of the bus bar frame 300 is connected to one or the other side of the battery cell stack 100, and the other side of the bus bar frame 300 is connected to the bus bars 310, 320.

[0049] The bus bar frame 300 may include one or more bus bar seating bases 340 and one or more ribs 330 to which the bus bars 310 and 320 are coupled and seated (see FIG. 8).

[0050] The bus bars 310 and 320 may be seated on the front surface of the bus bar seating bases 340 of the bus bar frame 300, and the plurality of bus bar seating bases 340 may be arranged at intervals in the width direction of the battery module 1000.

[0051] The rib 330 is configured to connect two bus bar seats 340 between adjacent bus bar seats 340. By disposing the rib 330 between two adjacent bus bar seats 340, the rigidity of the bus bar frame 300 can be improved.

[0052] The bus bar frame 300 may include an electrically insulating material, which limits contact between the bus bars 310 and 320 and other parts of the battery cell 110 other than the parts joined to the electrode leads 111 and 112, thereby preventing the occurrence of an electrical short circuit.

[0053] The bus bar frames 300 may be located on one side and the other side of the battery cell stack 100, respectively.

[0054] The bus bars 310, 320 may be attached to the bus bar seat 340 on one side of the bus bar frame 300 and serve to electrically connect the battery cell stack 100 or the battery cells 110 to an external device circuit. A plurality of bus bars 310, 320 may be provided, and by being positioned between the battery cell stack 100 or the bus bar frame 300 and the end plate 400, they are protected from external impacts and can minimize deterioration in durability due to external moisture and the like.

[0055] The bus bars 310 and 320 can be electrically connected to the battery cell stack 100 via the electrode leads 111 and 112 of the battery cells 110 .

[0056] Specifically, the electrode leads 111, 112 of the battery cells 110 may pass through lead slits formed in the bus bar frame 300 and then bend to be connected to the bus bars 310, 320. As shown in Fig. 8, the electrode leads 111, 112 of the battery cells 110 may be connected to both sides of the bus bars 310, 320, and the electrode lead 111 connected to one side of the bus bars 310, 320 may be an anode lead, and the electrode lead 112 connected to the other side of the bus bars 310, 320 may be a cathode lead.

[0057] The bus bars 310, 320 connect the battery cells 110 that make up the battery cell stack 100 in series or parallel.

[0058] The bus bars 310, 320 may include a terminal bus bar 320 for electrically connecting one battery module 1000 to another battery module 1000. To be connected to another battery module 1000, at least a portion of the terminal bus bar 320 may be exposed to the outside of the end plate 400, and the end plate 400 is provided with a terminal opening 410 for this purpose.

[0059] One end (second portion 322 ) of terminal bus bar 320 can be exposed through opening 510 in insulating cover 500 and terminal opening 410 in end plate 400 .

[0060] 4, the terminal bus bar 320 may include a first portion 321 connected to the electrode leads 111, 112 of the battery cell 110, and a second portion 322 exposed to the outside through the terminal opening 410. The terminal bus bar 320 may further include a bent portion 323 formed between the first portion 321 and the second portion 322.

[0061] In the terminal bus bar 320, the first portion 321 may be connected to the second portion 322 through the bent 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, the bent portion 323 is formed in the terminal bus bar 320, and the second portion 322 protrudes and seats on the seating portion 530 of the insulating cover 500, and the second portion 322 is electrically connected to the inter-bus bar (not shown). The second portion 322 constituting one end of the terminal bus bar 320 has a coupling hole 322a formed in it, and the second portion 322 of the terminal bus bar 320 is fixed by a fixing pin (not shown) inserted into the coupling hole 322a.

[0062] The end plate 400 may serve to protect the battery cell stack 100 and the electrical components connected thereto from external physical impact by covering the open side of the module case 200. For this purpose, the end plate 400 is made of a material having a predetermined strength, for example, the end plate 400 is made of a metal such as aluminum or a plastic material.

[0063] Terminal openings 410 may be formed in the end plate 400. The terminal openings 410 are provided on both sides of the end plate 400, and a part 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.

[0064] A connector opening may be located between the terminal openings 410 located on both sides of the end plate 400, and the module connector may be exposed to the outside through the connector opening.

[0065] The end plate 400 covers the bus bar frame 300 or the bus bars 310, 320 located on one side of the battery cell stack 100 and can be coupled to the module case 200. Each edge of the end plate 400 can be coupled to a corresponding edge of the module case 200 by welding, bolting, hooking, or other methods.

[0066] The end plates 400 may be positioned on one and the other sides of the module case 200 so as to cover both sides of the battery cell stack 100. In this embodiment, an example in which the end plates 400 are positioned on the front and rear sides of the module case 200 is shown.

[0067] In addition, an insulating cover 500 for electrical insulation may be positioned between the end plate 400 and the bus bar frame 300. That is, the bus bar frame 300, the insulating cover 500, and the end plate 400 may be positioned in this order from the outside of the battery cell stack 100. Like the end plate 400, the bus bar frame 300 and the insulating cover 500 may each be configured in multiple pieces.

[0068] The insulating cover 500 is made of an electrically insulating material, and can thereby block contact between the bus bars 310 and 320 and the end plate 400 .

[0069] The insulating cover 500 may include an opening 510 and a seat 530. The openings 510 are disposed on both sides of the upper portion of the insulating cover 500, and one end (second portion 322) of the terminal bus bar 320 may be exposed through the openings 510.

[0070] Furthermore, a connector opening may be located between the openings 510 located on both sides of the insulating cover 500, and the module connector may be exposed to the outside through the connector opening.

[0071] The insulating cover 500 may be located on the inner surface of the end plate 400 and may, but does not necessarily, fit tightly against the inner surface of the end plate 400 .

[0072] As described above, one end (second portion 322) of terminal bus bar 320 may be exposed through opening 510, and this exposed end (second portion 322) of terminal bus bar 320 may be seated on seat 530. Therefore, seat 530 may be disposed adjacent to opening 510 and on the outer surface of the upper portion.

[0073] The seating portion 530 has an upper surface on which the second portion 322 of the terminal bus bar 320 is seated, and therefore the upper surface of the seating portion 530 can form a seating surface. Also, as shown in Figures 5 and 6, the seating portion 530 can include a fixing member 531 for fixing the terminal bus bar 320.

[0074] The fixing member 531 fixes the second portion 322 of the terminal bus bar 320 and may include a fixing hole 531a.

[0075] A fixing means such as a fixing pin (not shown) may be inserted into the fixing hole 531a. The fixing pin (not shown) is inserted into the coupling hole 322a formed in the second portion 322 of the terminal bus bar 320 and coupled to the fixing hole 531a, thereby fixing the second portion 322 of the terminal bus bar 320 to the insulating cover 500.

[0076] Therefore, second portion 322 of terminal bus bar 320 is seated on seating portion 530 of insulating cover 500 , and second portion 322 is seated on and comes into contact with fixing member 531 arranged on seating portion 530 .

[0077] A terminal cover portion (not shown) that covers one end (second portion 322) of the terminal bus bar 320 that is exposed may also be arranged on the insulating cover 500.

[0078] As shown in FIGS. 6 to 8, the insulating cover 500 can include a pressure pad 540.

[0079] The pressure pad 540 is disposed on the inner surface of the insulating cover 500 facing the bus bar frame 300, and is capable of applying pressure to the bus bar frame 300 in the direction of the battery cell stack 100. The pressure pad 540 is also capable of compressing the bus bar frame 300 while applying pressure.

[0080] A plurality of pressure pads 540 may be arranged spaced apart from one another, and the pressure pads 540 may be arranged spaced apart in the width direction (X-axis direction) of the battery module 1000.

[0081] Each pressure pad 540 extends in the vertical direction, and the vertical length of the pressure pad 540 may be shorter than that of the insulating cover 500. Although the pressure pad 540 is shown with a rectangular cross section in plan view, this is not limited thereto and the pressure pad 540 may have a cross section of another shape.

[0082] The pressure pad 540 can pressurize the bus bar frame 300 between the bus bars 310, 320 arranged on the bus bar frame 300 toward the opposite bus bar frame 300 or the opposite end plate 400 in the length direction (Y-axis direction) of the battery module 1000 (pressure in the direction from lead 111 to lead 112). Specifically, the front end of the pressure pad 540 can contact the rib 330 located between the bus bar frame 300 and the bus bars 310, 320 to pressurize the rib.

[0083] In the bus bar frame 300, the rib 330 is located between the bus bars 310, 320 and may be recessed toward the battery cell stack 100. The front end of the pressure pad 540 is located between the two bus bars 310, 320, and the pressure pad 540 can contact the rib 330 between the bus bars 310, 320 and press the rib 330 toward the battery cell stack 100.

[0084] The pressure pad 540 is made of a foam pad, and may be made of a synthetic resin foam, for example, urethane foam.

[0085] As shown in Fig. 7, the pressure pads 540 are arranged on the insulating covers 500 arranged on both sides of the battery cell stack 100, respectively, and can apply pressure to the bus bar frames 300 on both sides of the battery module 1000. The number of pressure pads 540 on the insulating covers 500 arranged on both sides of the battery cell stack 100 may be the same or different. In Fig. 7, four pressure pads 540 are arranged on the insulating covers 500 on both sides, but for example, three pressure pads 540 may be arranged on one insulating cover 500 and four pressure pads 540 may be arranged on the insulating cover 500 on the opposite side.

[0086] In this way, the pressure pads 540 pressurize the bus bar frame 300 on both sides of the battery module 1000, thereby positioning the battery cell stack 100 in the correct position relative to the center line (C) of the battery module 1000 in the longitudinal direction of the battery module 1000, thereby improving the positioning accuracy of the holes (connection holes 322a) of the terminal bus bars 320.

[0087] As described above, the terminal bus bar 320 is fixed to the insulating cover 500 by the fixing pin (not shown) inserted into the connecting hole 322a of the terminal bus bar 320 and connecting to the fixing hole 531a of the insulating cover 500. However, if the connecting hole 322a of the terminal bus bar 320 and the fixing hole 531a of the insulating cover 500 are misaligned and the connecting hole 322a of the terminal bus bar 320 is positioned offset from the fixing hole 531a of the insulating cover 500, it becomes difficult to fix the terminal bus bar 320 to the insulating cover 500 with the fixing pin.

[0088] Therefore, the position of the holes in the terminal bus bar 320 is important. In the present invention, as shown in FIG. 9, the coupling holes 322a in the terminal bus bar 320 are positioned to coincide with the fixing holes 531a in the insulating cover 500, thereby improving the assembly and workability of the battery module 1000.

[0089] The battery modules 1000 are electrically connected to each other by inter-bus bars (not shown). The inter-bus bars are members for connecting one battery module 1000 to another adjacent battery module 1000 or a BDU (Battery Disconnection Unit), and can be connected to an exposed end (second portion 322) of the terminal bus bar 320. For example, the inter-bus bars may be connected to an upper portion of one end (second portion 322) of the terminal bus bar 320 by overlapping it.

[0090] After one end of the inter-busbar is positioned overlapping the second portion 322 of the terminal busbar 320, the fixing pin is inserted sequentially into the connecting hole of the inter-busbar and the connecting hole 322a of the second portion 322 from the terminal busbar 320, and then the fixing pin is fixed in the fixing hole 531a of the seating portion 530, thereby connecting the pack busbar to the terminal busbar 320.

[0091] Additionally, the second portions 322 of the terminal bus bars 320, together with the inter-bus bars, are fixed to the insulating cover 500 by the fixing pins.

[0092] One or more battery modules 1000 according to the present invention as described above may form a battery pack 2000. As shown in Fig. 10, a battery pack 2000 according to an embodiment of the present invention accommodates at least one battery module 1000 inside a pack case 2100, and may include various control and protection systems such as a BMS (Battery Management System) and a cooling system.

[0093] 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 may accommodate a plurality of battery modules 1000 in the internal space of the lower housing 2110 and the upper housing.

[0094] Although the embodiment of the present invention has been described with reference to an example in which a plurality of battery modules 1000 are housed inside the battery pack 2000, a plurality of battery cells 110 may be directly arranged inside the battery pack 2000.

[0095] The battery module 1000 and the battery pack 2000 according to the present invention configured as described above can be applied to various devices. Specifically, the battery module 1000 and the battery pack 2000 can be applied to transportation means such as electric bicycles, electric vehicles (V), and hybrid vehicles, as well as ESS (Energy Storage Systems), but is not limited to these, and can be applied to various devices that can use secondary batteries.

[0096] 11 is a diagram showing an electric vehicle (V) equipped with a battery pack 2000. In the electric vehicle (V), the wheels are driven by a motor supplied with power from the battery pack 2000, and the electric vehicle is operated.

[0097] Although the present invention has been described above using preferred embodiments, it should be understood that the present invention is not limited to the above embodiments and can be modified and altered in various ways by those skilled in the art to which the invention pertains, without departing from the spirit of the present invention. [Industrial Applicability]

[0098] The present invention can provide a battery module and pack that improves the hole position accuracy of the terminal bus bar by restraining the position of the cell block and arranging the cell block in the correct position within the module. [Explanation of symbols]

[0099] 100 Battery cell stack 110 battery cells 111 Electrode lead 112 Electrode Lead 113 Lead Film 114 Sealing part 115 Cell Case 116 Storage groove 150 compression pads 200 Module Case 201 Top surface 300 Busbar Frame 310 Busbar 320 Terminal Busbar 321 First Part 322 Second Part 322a Binding hole 323 Bending Department 330 Ribs 340 Busbar seating base 400 End Plate 410 Terminal opening 500 Insulation Cover 510 Opening 530 Seating area 531 Fixing member 531a Fixed hole 540 Pressure Pad 1000 Battery Module 2000 battery pack 2100 pack case

Claims

1. a battery cell stack in which a plurality of battery cells are stacked; a module case for accommodating the battery cell stack; a bus bar frame disposed on one side of the battery cell stack; an insulating cover disposed on the outside of the bus bar frame; and a pressure pad disposed inside the insulating cover and configured to pressurize the bus bar frame; A battery module comprising:

2. The battery module according to claim 1 , wherein the pressure pad is disposed on an inner surface facing the bus bar frame from the insulating cover.

3. The battery module according to claim 1 or 2, wherein the pressure pad is attached to the inside of the insulating cover.

4. The battery module according to claim 1 or 2, wherein the pressure pad is compressible.

5. 3. The battery module according to claim 1, wherein the pressure pad is a foam pad.

6. The battery module according to claim 1 or 2, wherein a plurality of the pressure pads are arranged inside the insulating cover.

7. The battery module according to claim 1 or 2, further comprising a plurality of bus bars arranged on the bus bar frame.

8. The battery module according to claim 7 , wherein an end of the pressure pad is disposed between the bus bars.

9. The battery module according to claim 7 , wherein the bus bar frame further includes ribs disposed between the bus bars.

10. The battery module according to claim 9 , wherein the pressure pad presses the rib.

11. the bus bar frames are disposed on both sides of the battery cell stack; the insulating covers are disposed on both sides of the module case, The battery module according to claim 1 or 2, wherein the pressure pads are respectively disposed on the insulating covers disposed on both sides of the module case.

12. The battery module according to claim 1 or 2, wherein the pressure pad extends vertically from an inner side of the insulating cover.

13. a terminal bus bar disposed on the bus bar frame; and a fixing member having a fixing hole for fixing one end of the terminal bus bar, the fixing member being disposed below the one end of the terminal bus bar from the insulating cover; The battery module according to claim 1 or 2, further comprising:

14. The battery module according to claim 1 , further comprising an end plate disposed outside the insulating cover.

15. the insulating covers are disposed on both sides of the module case, The battery module according to claim 14 , wherein the end plates are disposed on both sides of the module case from outside the insulating cover.

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