Battery module and battery pack including same

Abstract

Provided is a battery module including: a battery cell stack in which a plurality of battery cells are stacked; a module case configured to accommodate 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 pressing pad disposed on an inner side of the insulating cover and pressing the bus bar frame.

Description

Technical Field

[0001] The present disclosure relates to a battery module and a battery pack including the battery module, and more particularly, to a battery module in which the hole positions of terminal busbars in the battery module are improved and a battery pack including the battery module. Background Art

[0002] Unlike primary batteries that cannot be recharged, secondary batteries refer to batteries that can be charged and discharged, and they are applied not only to portable devices but also to electric vehicles ("EVs") and hybrid electric vehicles ("HEVs") driven by electric power sources.

[0003] Currently widely used types of secondary batteries may include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. The operating voltage of such a single secondary battery cell (i.e., a single cell) is approximately 2.5V to 4.6V. Therefore, when a higher output voltage is required, a battery pack is formed by connecting a plurality of battery cells in series. In addition, depending on the charge and discharge capacity required for the battery pack, a battery pack can be constituted by connecting a plurality of battery cells in parallel. Therefore, the number of battery cells included in the battery pack can be set in various ways according to the required output voltage or charge and discharge capacity.

[0004] When a battery pack is constituted by connecting a plurality of battery cells in series / parallel, generally, a battery module composed of at least one battery cell (preferably, a plurality of battery cells) is first constituted, and a battery pack is constituted by using at least one such battery module and adding other components. Here, a battery module refers to a component in which a plurality of battery cells are connected in series or in parallel, and a battery pack refers to a component in which a plurality of battery modules are connected in series or in parallel to increase capacity, output, etc.

[0005] In a battery module, a battery cell block composed of a plurality of battery cells may move within the gap with the module frame. Summary of the Invention

[0006] Technical Problem

[0007] The present disclosure aims to solve the above problems and relates to providing a battery module capable of restricting the position of a battery cell block and improving the hole positions of terminals and a battery pack including the battery module.

[0008] Technical Solution

[0009] According to the present disclosure, a battery module includes: a battery cell stack in which a plurality of battery cells are stacked; a module housing configured to accommodate the battery cell stack; a bus bar frame provided on one side of the battery cell stack; an insulating cover provided outside the bus bar frame; and a pressing pad provided inside the insulating cover and pressing the bus bar frame.

[0010] In addition, the pressing pad may be provided on the inner surface of the insulating cover facing the bus bar frame.

[0011] In addition, the pressing pad may be attached to the inside of the insulating cover.

[0012] In addition, the pressing pad may be compressible.

[0013] In addition, the pressing pad may include a foam pad.

[0014] In addition, the pressing pad may include a plurality of pressing pads provided on the inner side of the insulating cover.

[0015] In addition, the battery module may further include a plurality of bus bars provided at the bus bar frame.

[0016] In addition, the end of the pressing pad is provided between the bus bars (plural).

[0017] In addition, the bus bar frame may further include ribs provided between the bus bars (plural).

[0018] In addition, the pressing pad may press the ribs.

[0019] In addition, the bus bar frame may be provided on opposite sides of the battery cell stack, the insulating cover may be provided on opposite sides of the module housing, and the pressing pads may be respectively provided at the insulating covers provided on opposite sides of the module housing.

[0020] In addition, the pressing pad may extend in the vertical direction on the inner side of the insulating cover.

[0021] In addition, the battery module may further include: a terminal bus bar provided at the bus bar frame; and a fixing member having a fixing hole configured to fix one end of the terminal bus bar and provided below one end of the terminal bus bar in the insulating cover.

[0022] In addition, the battery module may further include end plates provided outside the insulating cover.

[0023] In addition, the insulating cover may be provided on opposite sides of the module housing, and the end plates may be provided on opposite sides of the module housing outside the insulating cover.

[0024] Advantageous Effects

[0025] The battery module according to the present disclosure and the battery pack including the same have the following effects: restricting the position of the battery cell block, ensuring that the battery cell block is located at an accurate position within the battery module, and improving the hole positions of the terminal bus bars. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a perspective view showing a battery module according to the present disclosure.

[0027] Figure 2 is an exploded perspective view showing a battery module according to the present disclosure.

[0028] Figure 3 is a perspective view showing a battery cell according to the present disclosure.

[0029] Figure 4 is a perspective view showing a terminal bus bar according to the present disclosure.

[0030] Figure 5 is a perspective view showing an insulating cover and an end plate according to the present disclosure.

[0031] Figure 6 is a perspective view showing an insulating cover according to the present disclosure.

[0032] Figure 7 is a view showing the insulating cover and the end plate combined with opposite sides of the battery cell stack according to the present disclosure.

[0033] Figure 8 is a view showing the state where the insulating cover is combined with the bus bar frame according to the present disclosure.

[0034] Figure 9 is a view showing the state where the holes of the terminal bus bar are accurately positioned according to the present disclosure.

[0035] Figure 10 is a view showing a battery pack according to an aspect of the present disclosure.

[0036] Figure 11 is a perspective view showing a vehicle provided with a battery pack according to an aspect of the present disclosure. DETAILED DESCRIPTION

[0037] Advantages and features of the present disclosure, and methods for achieving them, will become apparent by referring to the aspects described in detail below and the accompanying drawings. However, the present disclosure is not limited to the aspects disclosed below and will be implemented in various different forms. The aspects of the present disclosure are only for ensuring that the disclosure content of the present disclosure is complete. It is provided to fully inform those of ordinary skill in the technical field to which the present disclosure pertains, and the present disclosure is only defined by the scope of the claims. Therefore, in some aspects, well-known process steps, well-known device structures, and well-known technologies are not specifically described to avoid ambiguous interpretation of the present disclosure. Throughout the specification, the same reference numerals denote the same elements.

[0038] To clearly represent multiple layers and regions in the drawings, the thickness may be enlarged. Throughout the specification, similar components are given the same reference numerals. When a part of a layer, film, region, plate, etc. is described as being "on" another component, this includes not only being "directly on" another component, but also the case where there is another part therebetween. Conversely, when a part is described as being "directly on" another part, this means that there is no other part therebetween. Additionally, when a part of a layer, film, region, plate, etc. is described as being "under" another part, this includes not only the case where it is "directly under" another part, but also the case where there is another part therebetween. Conversely, when a part is described as being "directly under" another part, this means that there is no other part therebetween.

[0039] The battery module 1000 according to one aspect of the present disclosure will be described in detail with reference to the accompanying drawings.

[0040] Figure 1 is a perspective view showing the battery module according to the present disclosure. Figure 2 is an exploded perspective view showing the battery module according to the present disclosure, Figure 3 is a perspective view showing the battery cell according to the present disclosure, Figure 4 is a perspective view showing the terminal bus bar according to the present disclosure, Figure 5 is a perspective view showing the insulating cover and the end plate according to the present disclosure, Figure 6 is a perspective view showing the insulating cover according to the present disclosure, Figure 7 is a view showing the insulating cover and the end plate combined with opposite sides of the battery cell stack according to the present disclosure, Figure 8 is a view showing the state where the insulating cover is combined with the bus bar frame according to the present disclosure, and Figure 9 is a view showing the state where the holes of the terminal bus bar are accurately positioned according to the present disclosure.

[0041] The battery module 1000 according to one aspect of the present disclosure may include: a battery cell stack 100 in which a plurality of battery cells 110 are stacked; a module housing 200 configured to accommodate the battery cell stack 100; a bus bar frame 300 disposed on one surface and / or the other surface of the battery cell stack 100; an insulating cover 500 disposed outside the bus bar frame 300; and an end plate 400 disposed outside the insulating cover 500.

[0042] The battery cell stack 100 may be formed by stacking a plurality of battery cells 110 along one direction, and the plurality of battery cells 110 may be electrically connected to each other. The direction in which the plurality of battery cells 110 are stacked may be Figure 2 the X-axis direction (or the -X axis direction) in

[0043] The direction from the front surface to the rear surface of the battery cell stack 100 or the opposite direction thereof may be defined as the length direction of the battery cell stack 100, and may be the Y-axis direction in the figure. Additionally, the direction from the upper surface to the lower surface of the battery cell stack 100 or the opposite direction thereof may be defined as the width direction of the battery cell stack 100, and may be the Z-axis direction in the figure.

[0044] The length direction of the battery cell stack 100 may be substantially the same as the length direction of the battery cell 110. The electrode leads 111, 112 of the battery cell 110 may be disposed on the front surface and the rear surface of the battery cell stack 100, and the bus bars 310, 320 of the battery module 1000 may be disposed close to the front surface and the rear surface of the battery cell stack 100 to easily form electrical connections with the electrode leads 111, 112.

[0045] The battery cell 110 may be provided as a pouch-type battery cell, and the number of battery cells stacked per unit area may be maximized in the pouch-type battery cell. However, the battery cell 110 does not necessarily have to be provided as a pouch-type, and may be provided in a polygonal, cylindrical, or other various shapes.

[0046] The battery cell 110 provided as a pouch-type may include an electrode assembly and a battery cell housing 115 that houses the electrode assembly, see Figure 3

[0047] The battery cell housing 115 of the battery cell 110 may be a pouch-type battery cell housing 115 for housing the electrode assembly. The battery cell housing 115 may include a lower housing and an upper housing that covers the lower housing, and the upper housing and the lower housing may be integrally formed as one body. Additionally, as Figure 3 shown, the connection portion of the upper housing and the lower housing may be formed into a bent and folded structure. Additionally, as shown in the figure, the upper housing may completely cover the lower housing, and a sealing portion 114 may be formed in the peripheral region.

[0048] The upper housing and the lower housing can both be formed into a laminated structure including an inner covering layer, a metal layer, and an outer covering layer. The inner covering layer located on the inner side of the battery cell housing 115 with respect to the metal layer may need to have insulation and electrolytic resistance since the inner covering layer directly contacts the electrode assembly, and also needs to have a sealing property to seal with the outside. That is, the sealed portion thermally bonded by the inner layer should have excellent thermal bonding strength. The metal layer located between the inner covering layer and the outer covering layer serves as a barrier layer to prevent moisture or various gases from penetrating into the battery from the outside, and a preferred material for the metal layer in contact with the inner covering layer can be an aluminum (Al) thin film that is lightweight and has excellent formability. The outer covering layer is located on the outer side of the battery cell housing 115 with respect to the metal layer, and the outer covering layer can use a heat-resistant polymer having excellent characteristics in terms of tensile strength, moisture permeability, and air permeability to protect the electrode assembly while ensuring heat resistance and chemical resistance. For example, nylon or polyethylene terephthalate can be used.

[0049] Accommodating recesses 116 can be formed in each of the upper housing and the lower housing, and the electrode assembly can be accommodated in the accommodating recesses 116 of the upper housing and the lower housing.

[0050] The electrode assembly accommodated in the battery cell housing 115 can be one of a group composed of electrode assemblies: a wound electrode assembly having a structure in which a separator is disposed between an elongated sheet-shaped anode and a cathode and then wound; a stacked electrode assembly composed of unit battery cells having a structure in which a rectangular anode and a cathode are stacked and a separator is disposed between the anode and the cathode; a stacked-folded type electrode assembly in which the unit battery cells are wound through an elongated separator; and a lamination-stack type electrode assembly in which the unit battery cells are stacked and attached to each other with a separator interposed therebetween.

[0051] In addition, the electrode assembly can include two electrode tabs and two electrode leads 111, 112 respectively connected to the electrode tabs through welding portions.

[0052] One of the two electrode leads 111, 112, either 111 or 112, can be an anode (positive) lead connected to the anode tab, and the other electrode lead 111 or 112 can be a cathode (negative) lead connected to the cathode tab.

[0053] The lead film 113 can be attached to each of the electrode leads 111, 112. The lead film 113 combined with the electrode leads 111, 112 can be disposed between the electrode leads 111, 112 and the battery cell housing 115 to prevent a short circuit between the electrode leads 111, 112 and the battery cell housing 115 and improve the sealing force, thereby preventing leakage of the electrolyte and the like.

[0054] Although the two electrode leads 111, 112 are shown as being respectively disposed on opposite sides of the electrode assembly, the two electrode leads 111, 112 can be disposed only on one side of the electrode assembly according to the arrangement of the electrode tabs.

[0055] The module housing 200 can be configured to protect the battery cell stack 100 and the electrical components connected thereto from external physical impacts, and the module housing 200 can accommodate the battery cell stack 100 and the electrical components connected thereto in the internal space of the module housing 200.

[0056] The structure of the module housing 200 can vary. For example, the structure of the module housing 200 can be a single-frame structure. Here, the single frame can be in the form of a metal plate integrally formed with the upper surface, the lower surface, and the opposite side surfaces. The single frame can be manufactured by extrusion molding. As another example, the module housing 200 can have a structure in which a U-shaped frame and an upper plate (upper surface) 201 are combined with each other. In the case of the structure in which the U-shaped frame and the upper plate are combined with each other, the structure of the module housing 200 can be formed by combining the upper plate to the upper side of the U-shaped frame, and each frame or plate can be manufactured by press molding, wherein the upper side of the U-shaped frame is a metal plate in which the lower surface and the opposite side surfaces are combined or integrally formed. In addition, in addition to the single frame or the U-shaped frame, the structure of the module housing 200 can be set to an L-shaped frame structure, and can be set to various structures not described in the above examples.

[0057] The structure of the module housing 200 can be set to a form that is open along the length direction of the battery cell stack 100. The front surface and the rear surface of the battery cell stack 100 can not be covered by the module housing 200. The electrode leads 111, 112 of the battery cell 110 can not be covered by the module housing 200. The front surface and the rear surface of the battery cell stack 100 can be covered by the bus bar frame 300, the end plate 400, or the bus bars 310, 320 described below, and thus, the front surface and the rear surface of the battery cell stack 100 can be protected from external physical impacts and the like.

[0058] A compression pad 150 can be disposed between one side surface of the inner surface of the battery cell stack 100 and the module housing 200.

[0059] The compression gasket 150 can be arranged to face the battery cell 110 which is located on the outermost side of the battery cell stack 100 in the X-axis direction in the figure.

[0060] In addition, although not shown, a thermally conductive resin can be injected between the battery cell stack 100 and the inner surface of the module housing 200, and an unshown thermally conductive resin layer can be formed between one of the surfaces of the battery cell stack 100 and the inner surface of the module housing 200 through the injected thermally conductive resin. In this case, the thermally conductive resin layer can be located on the Z-axis of the battery cell stack 100, and the thermally conductive resin layer can be formed between the battery cell stack 100 and the bottom surface of the module housing 200 on the -Z axis.

[0061] The bus bar frame 300 can be arranged on one surface of the battery cell stack 100, and can cover one surface of the battery cell stack 100 while guiding the connection between the battery cell stack 100 and an external device. Specifically, the bus bar frame 300 can be arranged on the front surface or the rear surface of the battery cell stack 100 as shown in the figure, or can be arranged on the upper surface, the lower surface or the side surface. At least one of the bus bars 310, 320 and the module connector can be arranged on the bus bar frame 300. As Figure 2 shown, one surface of the bus bar frame 300 can be connected to one surface or another surface of the battery cell stack 100, and the other surface of the bus bar frame 300 can be connected to the bus bars 310, 320.

[0062] The bus bar frame 300 can include one or more bus bar mounting parts 340 on which the bus bars 310, 320 are combined and mounted, and one or more ribs 330 (see Figure 8 ).

[0063] The bus bars 310, 320 can be mounted on the front part of the bus bar mounting parts 340 of the bus bar frame 300, and the plurality of bus bar mounting parts 340 can be arranged to be spaced apart from each other in the width direction of the battery module 1000.

[0064] The ribs 330 can be configured to connect two adjacent bus bar mounting parts 340 between the adjacent bus bar mounting parts 340. The ribs 330 can be arranged between two adjacent bus bar mounting parts 340 to improve the strength of the bus bar frame 300.

[0065] The bus bar frame 300 can include an electrically insulating material. The bus bar frame 300 can limit the bus bars 310, 320 from contacting other parts of the battery cell 110 except for the parts where the bus bars 310, 320 are connected to the electrode leads 111, 112, and can prevent an electrical short circuit from occurring.

[0066] The bus bar frame 300 can be provided on each of one side and the other side of the battery cell stack 100.

[0067] The bus bars 310 and 320 can be on the bus bar mounting portions 340 provided on one surface of the bus bar frame 300, and can be used to electrically connect the battery cell stack 100 or the battery cells 110 to an external device circuit. The bus bars 310 and 320 can include a plurality of bus bars, and can be provided between the battery cell stack 100 or the bus bar frame 300 and the end plate 400, so as to be protected from external impacts, etc., and to minimize durability degradation caused by external moisture, etc.

[0068] The bus bars 310 and 320 can be electrically connected to the battery cell stack 100 through the electrode leads 111 and 112 of the battery cells 110.

[0069] Specifically, the electrode leads 111 and 112 of the battery cells 110 can be bent after passing through the lead slits formed in the bus bar frame 300 and connected to the bus bars 310 and 320. As Figure 8 shown, the electrode leads 111 and 112 of the battery cells 110 can be connected to opposite sides of the bus bars 310 and 320, and the electrode lead 111 connected to one side of the bus bars 310 and 320 can be an anode lead, and the electrode lead 112 connected to the other side of the bus bars 310 and 320 can be a cathode lead.

[0070] The battery cells 110 constituting the battery cell stack 100 can be connected in series or in parallel through the bus bars 310 and 320.

[0071] The bus bars 310 and 320 can include a terminal bus bar 320 configured to electrically connect one battery module 100 to another battery module 100. At least a part of the terminal bus bar 320 can be exposed to the outside of the end plate 400 to be connected to another battery module 100. For this purpose, the end plate 400 can have a terminal opening 410.

[0072] The terminal bus bar 320 can have one end portion (second part 322) exposed through the opening 510 of the insulating cover 500 and the terminal opening 410 of the end plate 400.

[0073] As Figure 4 shown, the terminal bus bar 320 can include a first part 321 connected to the electrode leads 111 and 112 of the battery cells 110 and a second part 322 exposed to the outside through the terminal opening 410. In addition, the terminal bus bar 320 can further include a bent portion 323 formed between the first part 321 and the second part 322.

[0074] In the terminal bus bar 320, the first part 321 can be connected to the second part 322 through the bending part 323, and one surface of the first part 321 and one surface of the second part 322 can be perpendicular to each other. That is to say, by forming the bent bending part 323 in the terminal bus bar 320, the second part 322 can protrude to be mounted on the mounting part 530 of the insulating cover 500, and the second part 322 can be electrically connected to an inter-busbar (not shown). A coupling hole 322a can be formed in the second part 322 constituting one end of the terminal bus bar 320, and the second part 322 of the terminal bus bar 320 can be fixed by a fixing pin (not shown) inserted into the coupling hole 322a.

[0075] The end plate 400 can cover the opening surface of the module housing 200 to protect the battery stack 100 and the electrical components connected thereto from external physical impacts. For this purpose, the end plate 400 can be made of a material with a predetermined strength. For example, the end plate 400 can include a metal such as aluminum or a plastic material.

[0076] The end plate 400 can be formed with terminal openings 410. The terminal openings 410 can be arranged on each of the opposite sides of the end plate 400, and a part of the insulating cover 500 and one end (the second part 322) of the terminal bus bar 320 can be exposed through the terminal openings 410.

[0077] In addition, a connector opening can be provided between the terminal openings 410 located on the opposite sides of the end plate 400, and the module connector can be exposed to the outside through the connector opening.

[0078] The end plate 400 can cover the bus bar frame 300 or the bus bars 310, 320 located on one surface of the battery stack 100 while being combined with the module housing 200. Each corner of the end plate 400 can be combined with the corresponding corner of the module housing 200 by methods such as welding, bolting, or hook coupling.

[0079] The end plate 400 can be provided on one surface and the other surface of the module housing 200 to cover the opposite sides of the battery stack 100. In this regard, an example is shown where the end plate 400 is provided on the front surface and the rear surface of the module housing 200.

[0080] In addition, an insulating cover 500 for electrical insulation can be provided between the end plate 400 and the bus bar frame 300. That is to say, the bus bar frame 300, the insulating cover 500, and the end plate 400 can be sequentially arranged outward from the battery stack 100. Like the end plate 400, the bus bar frame 300 and the insulating cover 500 can each be configured in multiple numbers.

[0081] The insulating cover 500 may include an electrically insulating material and may prevent the busbars 310, 320 from contacting the end plate 400.

[0082] The insulating cover 500 may include an opening 510 and a mounting portion 530. The opening 510 may be disposed on each of the opposite sides of the upper portion of the insulating cover 500, and one end (second portion 322) of the terminal busbar 320 may be exposed through the opening 510.

[0083] In addition, a connector opening may be provided between the openings 510 located on the opposite sides of the insulating cover 500, and the module connector may be exposed to the outside through the connector opening.

[0084] The insulating cover 500 may be disposed on the inner surface of the end plate 400 and may be in close contact with the inner surface of the end plate 400, but this is not necessarily required.

[0085] As described above, one end (second portion 322) of the terminal busbar 320 may be exposed through the opening 510, and the exposed one end (second portion 322) of the terminal busbar 320 may be mounted on the mounting portion 530. Therefore, the mounting portion 530 may be disposed adjacent to the opening 510 and may be provided on the upper outer surface.

[0086] The mounting portion 530 may allow the second portion 322 of the terminal busbar 320 to be mounted on its upper surface, so the upper surface of the mounting portion 530 may form a mounting surface. In addition, as Figure 5 shown, the mounting portion 530 may include a fixing member 531 for fixing the terminal busbar 320.

[0087] The fixing member 531 may fix the second portion 322 of the terminal busbar 320 and may include a fixing hole 531a.

[0088] A fixing device such as a fixing pin (not shown) may be inserted into the fixing hole 531a. The fixing pin (not shown) inserted into the engaging hole 322a formed in the second portion 322 of the terminal busbar 320 may be fixed by engaging with the fixing hole 531a, so that the second portion 322 of the terminal busbar 320 may be fixed to the insulating cover 500.

[0089] Therefore, the second portion 322 of the terminal busbar 320 may be mounted on the mounting portion 530 of the insulating cover 500, and the second portion 322 may be mounted on and in contact with the fixing member 531 provided at the mounting portion 530.

[0090] In addition, a terminal cover portion (not shown) covering the exposed one end (second portion 322) of the terminal busbar 320 may be provided on the insulating cover 500.

[0091] On the other hand, as Figures 6 to 8 shown, the insulating cover 500 may include a pressing pad 540.

[0092] The pressing pad 540 may be disposed on the inner surface of the insulating cover 500 facing the bus bar frame 300, and may press the bus bar frame 300 in the direction toward the battery cell stack 100. Additionally, the pressing pad 540 may be compressed while pressing the bus bar frame 300.

[0093] A plurality of pressing pads 540 may be arranged to be spaced apart from each other, and the plurality of pressing pads 540 may be arranged to be spaced apart in the width direction (X-axis direction) of the battery module 1000.

[0094] Each pressing pad 540 may extend in the up-and-down direction, and the length of the pressing pad 540 in the up-and-down direction may be less than the length of the insulating cover 500. The pressing pad 540 is shown as having a quadrilateral cross-section on a plane, but is not limited thereto, and may have cross-sections of different shapes.

[0095] The pressing pad 540 may be between the bus bars 310, 320 provided in the bus bar frame 300, and may press the bus bar frame 300 (press in the direction from the lead wire 111 to the lead wire 112) toward the opposite-side bus bar frame 300 or the opposite-side end plate 400 in the length direction (Y-axis direction) of the battery module 1000. Specifically, the front end portion of the pressing pad 540 may contact the rib 330 provided between the bus bars 310, 320 in the bus bar frame 300 to press the rib 330.

[0096] In the bus bar frame 300, the rib 330 may be provided between the bus bars 310, 320, and may be formed in a shape recessed toward the battery cell stack 100. The front end portion of the pressing pad 540 may be provided between the two bus bars 310, 320, and the pressing pad 540 may contact the rib 330 between the bus bars 310, 320 to press the rib 330 in the direction toward the battery cell stack 100.

[0097] The pressing pad 540 may include a foam pad, and may be formed in the form of a synthetic resin foam, and may be formed of, for example, polyurethane foam.

[0098] The pressing pad 540 may be as Figure 7 shown and respectively disposed on the insulating covers 500 provided on opposite sides of the battery cell stack 100, and may each press the bus bar frame 300 from opposite sides of the battery module 1000. The number of the pressing pads 540 of the insulating covers 500 provided on opposite sides of the battery cell stack 100 may be the same or different from each other. Figure 7An example is shown where four pressing pads 540 are provided on each of the two insulating covers 500. However, for example, three pressing pads 540 can be provided on one insulating cover 500, and four pressing pads 540 can be provided on the opposite insulating cover 500.

[0099] Therefore, since each of the pressing pads 540 presses the bus bar frame 300 from opposite sides of the battery module 1000, the battery cell stack 100 can be set in the correct position in the length direction of the battery module 1000 to match the center line C of the battery module 1000, thereby improving the position (true position) of the holes (coupling holes 322a) of the terminal bus bar 320.

[0100] As described above, since a fixing pin (not shown) inserted into the coupling hole 322a of the terminal bus bar 320 is coupled and fixed to the fixing hole 531a of the insulating cover 500, the terminal bus bar 320 can be fixed to the insulating cover 500. However, if the coupling hole 322a of the terminal bus bar 320 and the fixing hole 531a of the insulating cover 500 are not aligned and the coupling hole 322a of the terminal bus bar 320 and the fixing hole 531a of the insulating cover 500 are not aligned, it is difficult to fix the terminal bus bar 320 to the insulating cover 500 with the fixing pin.

[0101] Therefore, the position of the holes of the terminal bus bar 320 is crucial. According to the present disclosure, as Figure 9 shown, the coupling holes 322a of the terminal bus bar 320 can be arranged to match the fixing holes 531a of the insulating cover 500, so that the assemblability and processability of the battery module 1000 can be improved.

[0102] On the other hand, the electrical connection between the battery modules 1000 can be made through an intermediate bus bar (not shown). The intermediate bus bar can be a member for connecting one battery module 1000 to another adjacent battery module 1000 or a battery disconnection unit (BDU: Battery Disconnection Unit), and can be connected to the exposed end (second part 322) of the terminal bus bar 320. For example, the intermediate bus bar can overlap and connect with the upper part of one end (second part 322) of the terminal bus bar 320.

[0103] After one end of the intermediate bus bar is set to overlap on the second part 322 of the terminal bus bar 320, the fixing pin is sequentially inserted into the coupling hole of the intermediate bus bar and the coupling hole 322a of the second part 322 in the terminal bus bar 320, and then the fixing pin is fixed to the fixing hole 531a of the mounting part 530 to connect the battery pack bus bar to the terminal bus bar 320.

[0104] In addition, the second part 322 of the terminal bus bar 320 and the intermediate bus bar can be fixed to the insulating cover 500 by fixing pins.

[0105] One or more battery modules 1000 according to the present disclosure as described above can form a battery pack 2000. As Figure 10 shown, the battery pack 2000 according to one aspect of the present disclosure can accommodate at least one or more battery modules 1000 inside a battery pack housing 2100, and can include various control and protection systems, such as a battery management system (BMS: Battery Management System), a cooling system, etc.

[0106] The battery pack housing 2100 can include a lower housing 2110 and an upper housing (not shown) coupled to the upper side of the lower housing 2110, and a plurality of battery modules 1000 can be accommodated in the internal space of the lower housing 2110 and the upper housing.

[0107] On the other hand, in one aspect of the present disclosure, an example in which a plurality of battery modules 1000 are accommodated inside the battery pack 2000 is shown, but a plurality of battery cells 110 can be directly arranged inside the battery pack 2000.

[0108] The battery module 1000 and the battery pack 2000 according to the present disclosure configured as described above can be applied to various devices. Specifically, it can be applied to transportation means such as electric bicycles, electric vehicles (V), and hybrid vehicles or an energy storage system (ESS: Energy Storage System), but various devices are not limited thereto, and it can be applied to various devices that can use secondary batteries.

[0109] Figure 11 is a view showing an electric vehicle (V) provided with a battery pack 2000. In the electric vehicle V, the wheels are driven by a motor that receives power from the battery pack 2000 so that the electric vehicle can operate.

[0110] The present disclosure has been described with reference to the preferred aspects as described above, but the present disclosure is not limited to the above aspects, and those skilled in the art can make various changes and modifications without departing from the spirit of the present disclosure.

[0111] [Industrial Applicability]

[0112] The present disclosure can provide a battery module and a battery pack that limit the position of a battery cell block, set the battery cell block at a correct position, and improve the hole position of a terminal bus bar.

Claims

1. A battery module, comprising: A battery cell stack in which a plurality of battery cells are stacked; A module housing configured to accommodate the battery cell stack; A bus bar frame disposed on one side of the battery cell stack; An insulating cover disposed outside the bus bar frame; And A pressing pad disposed inside the insulating cover and configured to press the bus bar frame.

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

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

4. The battery module according to claim 1, wherein, The pressing pad is compressible.

5. The battery module according to claim 1, wherein, The pressing pad includes a foam pad.

6. The battery module according to claim 1, wherein, The pressing pad includes a plurality of pressing pads disposed inside the insulating cover.

7. The battery module according to claim 1, further comprising a plurality of bus bars disposed at the bus bar frame.

8. The battery module according to claim 7, wherein, The end of the pressing 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 pressing pad presses the ribs.

11. The battery module according to claim 1, Among them, The bus bar frame is disposed on both sides of the battery cell stack, The insulating cover is disposed on both sides of the module housing, and The pressing pads are respectively disposed at the insulating covers disposed on both sides of the module housing.

12. The battery module according to claim 1, wherein, The pressing pad extends in the vertical direction inside the insulating cover.

13. The battery module according to claim 1, further comprising: A terminal bus bar disposed at the bus bar frame; And A fixing member having a fixing hole configured to fix one end of the terminal bus bar and disposed below one end of the terminal bus bar in the insulating cover.

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

15. The battery module according to claim 14, Among them, The insulating cover is disposed on both sides of the module housing, and The end plate is disposed on both sides of the module housing outside the insulating cover.

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