Battery module and battery pack including the battery module

Abstract

A battery module according to one embodiment of the present disclosure includes: a battery cell stack in which a plurality of battery cells are stacked; a lower frame covering a lower surface and two side surfaces of the battery cell stack; an upper frame covering an upper surface of the battery cell stack; a bus bar frame formed on a front surface and a rear surface of the battery cell stack, respectively; and a connecting portion connecting the bus bar frames, wherein the connecting portion is formed by a flexible flat cable (FFC) and is attached to the upper frame.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2019-0160899 filed on December 5, 2019, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety.

[0003] The present disclosure relates to a battery module and a battery pack including the battery module, and more particularly, to a battery module including an improved sensing connection part and a battery pack including the battery module. Background Art

[0004] Secondary batteries have attracted a lot of attention as energy sources in various products such as mobile devices and electric vehicles. Secondary batteries are a powerful energy resource that can replace the use of existing products using fossil fuels, and since secondary batteries do not produce byproducts due to energy use, they are currently attracting attention as an environmentally friendly energy source.

[0005] Recently, with the increasing necessity of large-capacity secondary battery structures using secondary batteries as energy storage sources, demand for multi-module structured battery packs as components of battery modules in which a plurality of secondary batteries are connected in series / parallel is growing.

[0006] Meanwhile, when a plurality of battery cells are connected in series / parallel to construct a battery pack, a battery module composed of at least one battery cell is generally first constructed, and then the battery pack is constructed by using at least one of the battery modules and adding other components.

[0007] Such a battery module includes a battery cell stack in which a plurality of battery cells are stacked, bus bar frames respectively formed at both ends of the battery cell stack, and a connection portion connecting the bus bar frames at both ends.

[0008] Figure 1 is an exploded perspective view of a conventional battery module 10 .

[0009] refer to Figure 1 , a conventional battery module 10 includes: a battery cell stack 20 in which a plurality of battery cells are stacked; a single frame 70 that accommodates the battery cell stack 20; and an end plate 80 that covers the open front and rear surfaces of the single frame.

[0010] The bus bar frames 32 and 33 , the bus bar 40 , and the insulator 60 are located between the battery cell stack 20 and the end plate 80 in this order.

[0011] A flexible printed circuit (FPC) 50 for voltage sensing and temperature sensing of the battery cells may be located on an upper surface of the battery cell stack 20 .

[0012] Conventionally, attempts have been made to connect the busbar frames 32 and 33 at both ends via the flexible printed board 50 and to install the cover plate 31 at the upper end of the flexible printed board 50 , thereby preventing the flexible printed board 50 from being damaged when the flexible printed board 50 is accommodated in the single frame 70 .

[0013] However, the problem is that due to Figure 1 The cover plate 31 disclosed in the embodiment is disposed above the flexible circuit board 50 , so the thickness of the cover plate 31 increases the height of the battery module, and the weight of the module increases.

[0014] When the size of the battery module increases in this manner, there are problems in that more installation space is required when installing the battery module, and when the battery module is installed in a vehicle, the running performance of the vehicle is deteriorated.

[0015] Furthermore, when the weight of a battery module increases, generally the utilization rate of the battery module decreases, and similarly, when a heavy battery module is installed in a vehicle, the running performance of the vehicle decreases, and thus the fuel efficiency decreases. Summary of the invention

[0016] Technical issues

[0017] An object of the present disclosure is to provide a battery module that can realize automatic assembly of a connection portion formed of a flexible flat cable and has improved space utilization efficiency.

[0018] However, the problems to be solved by the embodiments of the present disclosure are not limited to the above-mentioned problems, and can be variously extended within the scope of the technical ideas included in the present disclosure.

[0019] Technical Solution

[0020] A battery module according to one embodiment of the present disclosure includes: a battery cell stack in which a plurality of battery cells are stacked; a lower frame covering a lower surface and two side surfaces of the battery cell stack; an upper frame covering an upper surface of the battery cell stack; a bus bar frame formed on a front surface and a rear surface of the battery cell stack, respectively; and a connecting portion connecting the bus bar frames, wherein the connecting portion is formed by a flexible flat cable (FFC) and is attached to the upper frame.

[0021] An adhesive member may be located between the connection part and the upper frame so that the connection part is attached to the upper frame.

[0022] The bonding member may be a double-sided tape.

[0023] The connection portion may be located between the upper frame and the battery cell stack.

[0024] The connection portion may be formed in a flexible flat shape.

[0025] The connection part may include: a connection body located on an upper surface of the battery cell stack; a connection cable formed in a curved shape from both ends of the connection body toward the bus bar frame; and a connection part connector connected to the connection cable and respectively connected to the bus bar frame.

[0026] The connection portion connector may be coupled with a connection member formed in the bus bar frame.

[0027] A groove concave in a shape corresponding to the connection part may be formed on a lower surface of the upper frame, and the connection part may be attached to the groove.

[0028] A bonding member may be located between an inner surface of the groove and the connecting portion.

[0029] The connection portion may be formed parallel to a length direction of one battery cell among the plurality of battery cells.

[0030] The connection portion may extend in a straight line shape between the bus bar frames.

[0031] The lower frame may have an open upper surface, and the upper frame may cover the open upper surface of the lower frame.

[0032] Beneficial effects

[0033] In a battery module and a battery pack including the battery module according to an embodiment of the present disclosure, since the cover plate is removed, the height of the battery module can be reduced, thereby increasing the energy density of the battery module itself and ensuring the installation space for the battery module. Therefore, when the battery module or the battery pack is installed in a vehicle, it can bring about the effect of improving the running performance.

[0034] In addition, in a battery module and a battery pack including the battery module according to an embodiment of the present disclosure, since the cover plate is removed, the weight of the battery module is reduced, the utilization rate of the battery module can be improved, and when the battery module is installed in a vehicle, the fuel efficiency is improved.

[0035] Furthermore, the connection portion formed of the flexible flat cable is assembled while being attached to the upper frame, thereby improving manufacturing workability.

[0036] The effects of the present disclosure are not limited to the above-described effects, and further other effects not described above will be clearly understood by those skilled in the art from the description of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is an exploded perspective view of a traditional battery module.

[0038] Figure 2 is an exploded perspective view of a battery module according to the present disclosure.

[0039] Figure 3 It is shown Figure 2 FIG. 1 is a view of a state in which a connection portion included in a battery module and a bus bar frame are coupled.

[0040] Figure 4 It is shown Figure 2 A three-dimensional view of a connecting portion and an upper frame included in a battery module.

[0041] Figure 5 It is along Figure 4 A cross-sectional view taken along the cutting line AA'.

[0042] Figure 6 It is a perspective view for explaining the assembly method of the upper frame and the connecting part.

[0043] Figure 7 It is observed from above Figure 2 A top view of a connection portion included in a battery module.

[0044] Figure 8 yes Figure 7 Magnified view of portion “C” in FIG.

[0045] Fig. 9 is a view of a connection cable according to an embodiment of the present disclosure viewed from above.

[0046] Fig.10 is a view of a connection cable according to one embodiment of the present disclosure viewed from the front.

[0047] Fig.11 is a view showing a state in which a connection cable is installed on a bus bar frame according to one embodiment of the present disclosure.

[0048] Fig.12 is a perspective view showing a connection portion and an upper frame having a groove formed therein.

[0049] Fig.13 It is shown Fig.12 A three-dimensional view of a state in which the connecting portion and the upper frame are turned upside down.

[0050] Fig.14 It is along Fig.12 A cross-sectional view taken along the cutting line BB'. DETAILED DESCRIPTION

[0051] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. The present disclosure can be modified in various different ways and is not limited to the embodiments set forth herein.

[0052] Parts irrelevant to the description will be omitted to clearly describe the present disclosure, and the same reference numerals denote the same elements throughout the specification.

[0053] In addition, in the drawings, the size and thickness of each element are arbitrarily shown for convenience of description, and the present disclosure is not necessarily limited to what is shown in the drawings. In the drawings, the thickness of layers, regions, etc. are exaggerated for clarity.

[0054] Additionally, it will be understood that when an element, such as a layer, film, region, or plate, is referred to as being "on" or "above" another element, the element can be directly on the other element, or there may be intervening elements. Conversely, when an element is referred to as being "directly on" another element, this means that there are no other intervening elements. Furthermore, the terms "on" or "above" mean being placed on or below a referenced portion, and do not necessarily necessarily mean being placed on the upper end of the referenced portion in the direction opposite to the force of gravity.

[0055] Furthermore, throughout the specification, when a part is referred to as “comprising” a certain component, it means that the part can further include other components, without excluding the other components, unless otherwise stated.

[0056] Furthermore, throughout the specification, when referred to as a “plane”, this means observing the target portion from the upper side, and when referred to as a “section”, this means observing the target portion from a side of a vertically cut section.

[0057] Figure 2 is an exploded perspective view of a battery module according to an embodiment of the present disclosure, Figure 3 It is shown Figure 2 FIG. 4 is a view of a state in which a connection part 400 and a bus bar frame 300 included in a battery module are coupled.

[0058] refer to Figure 2 and Figure 3A battery module according to one embodiment of the present disclosure includes: a battery cell stack in which a plurality of battery cells 100 are stacked; a lower frame 210 covering a lower surface and two side surfaces of the battery cell stack; an upper frame 220 covering an upper surface of the battery cell stack; a busbar frame 300 formed on a front surface and a rear surface of the battery cell stack, respectively; and a connecting portion 400 connecting the busbar frame. For convenience of explanation, the connecting portion 400 and the upper frame 220 are shown as being separated from each other, but in the present embodiment, the connecting portion 400 is formed by a flexible flat cable (FFC) and is attached to the upper frame 220. The feature of the connecting portion 400 being attached to the upper frame 220 will be described later. Figure 4 and Figure 5 Described in.

[0059] The battery cell 100 is a secondary battery and can be composed of a pouch-type secondary battery. Such a battery cell 100 may be composed of a plurality of cells, and the plurality of battery cells 100 may be stacked together so as to be electrically connected to each other, thereby forming a battery cell stack. Although not specifically shown, each of the plurality of battery cells may include an electrode assembly, a battery housing, and an electrode lead protruding from the electrode assembly. At the same time, as in Figure 2 As shown in , a plurality of battery cells 100 may be disposed in parallel with both side surfaces 212 of the lower frame 210 and sequentially stacked along the y-axis direction.

[0060] The battery cell stack is surrounded by a lower frame 210 covering the lower surface and both side surfaces and an upper frame 220 covering the upper surface. The lower frame 210 is formed in a U-shaped structure having an open upper surface (z-axis direction), and may include a bottom 211 and two side surface portions 212 extending upward at both ends of the bottom 211.

[0061] The battery cell stack is inserted onto the bottom 211 of the lower frame 210 , and then mounted inside the frame by covering the upper surface of the battery cell stack via the upper frame 220 .

[0062] The lower frame 210 and the upper frame 220 are coupled together to accommodate the battery cell stack inside the frame. At this time, the two frames can be coupled by welding, but the coupling method of the frames is not limited thereto and can be implemented through various embodiments.

[0063] The busbar frame 300 is formed on the front and rear surfaces of the battery cell stack, respectively. The busbar frame 300 includes a busbar and a cell connection plate, and electrode leads of a plurality of battery cells 100 may be electrically connected via the busbar mounted on the busbar frame 300. Specifically, the electrode leads of the battery cells 100 may be bent and connected to the busbar after passing through the slits formed in the busbar frame 300.

[0064] The busbar frame 300 is composed of a first busbar frame 310 formed on one side surface of the battery cell stack and a second busbar frame 320 formed on the other side surface of the battery cell stack, thereby electrically connecting electrode leads on both sides of the battery cell stack.

[0065] The end plates 311 and 312 may be coupled to the opened front and rear surfaces of the coupled lower frame 210 and upper frame 220. That is, the end plates 311 and 312 may cover the first bus bar frame 310 and the second bus bar frame 320.

[0066] The end plates 311 and 312 can protect various electrical components provided in the first busbar frame 310 and the second busbar frame 320 from external impacts, and can guide the electrical connection between the first busbar frame 310 and the second busbar frame 320 and an external power source. Insulators (not shown) can be inserted between the end plates 311 and the first busbar frame 310 and between the end plates 312 and the second busbar frame 320 to cut off unnecessary electrical connections between the busbar frames 310 and 320 and the end plates 311 and 312.

[0067] The connection portion 400 is disposed between the first busbar frame 310 and the second busbar frame 320 to electrically connect the two busbar frames. Conventionally, a flexible printed circuit (FPC) is disposed between the busbar frames, whereby the two busbar frames are connected via a flexible circuit board, and a cover plate is installed on the upper end of the flexible printed board to prevent damage to the flexible printed board. However, according to one embodiment of the present disclosure, the cover plate that protects and supports the flexible circuit board is removed, and the first busbar frame 310 and the second busbar frame 320 are connected by using a cable formed of a flexible flat cable (FFC) instead of a flexible printed board, and the flexible flat cable is formed of a flat cable that does not require a protective member such as a cover plate.

[0068] By connecting two bus bar frames via FFC in this way, the height of the battery module can be reduced, the energy density of the battery itself can be increased, the installation space for the battery module can be ensured, and when the battery module is installed in a vehicle, the operating performance and fuel efficiency can be improved.

[0069] According to one embodiment of the present disclosure, a connection portion 400 formed of a flexible flat cable (FFC) is located between the upper frame 220 and the battery cell 100 stack. More specifically, an insulating film (not shown) is formed on the upper surface of the battery cell 100 stack, and the connection portion 400 is located between the insulating film (not shown) and the upper frame 220.

[0070] The connection portion 400 may be formed to be parallel to the length direction (x-axis direction) of any one of the plurality of battery cells 100. According to one embodiment of the present disclosure, the connection portion 400 may be formed to be parallel to the length direction of the battery cell at a position corresponding to the 16th battery cell of the outermost battery cell on one side of the plurality of battery cells 100. By allowing the position of the connection portion to correspond to any one of the battery cells in this manner, the connection portion 400 may be more easily assembled.

[0071] The connection part 400 can be formed of a flexible cable to be bent. A circuit for electrical connection between bus bar frames is inserted into the cable, thus making it easy to cope with external impact.

[0072] In addition, the connecting portion 400 can be formed into a flexible flat shape, that is, a flat shape. Therefore, compared with the case of a wire-type sensing circuit with a strong anti-bending repulsion, the connecting portion 400 can be bent or bent more flexibly and is easy to set a specific position during automatic assembly. In addition, in the case of a wire-type sensing circuit, an additional structure is required to protect the wire, and a separate assembly process is required, rather than being directly applied to the battery module. However, the flexible flat cable can be directly applied to the assembly of the battery module without the need for a separate protective structure.

[0073] Figure 4 It is shown Figure 2 A perspective view of a connecting portion 400 and an upper frame 220 included in a battery module, Figure 5 It is along Figure 4 A cross-sectional view taken along the cutting line AA'.

[0074] refer to Figure 4 and Figure 5As described above, the connection part 400 is formed of a flexible flat cable (FFC) and is attached to the upper frame 220. In particular, the bonding member 500 is located between the connection part 400 and the upper frame 220 so that the connection part 400 can be attached to the upper frame 220. In this case, the bonding member 500 may include a material having bonding properties and may be a double-sided tape.

[0075] Figure 6 This is a perspective view for explaining the assembly method of the upper frame and the connecting part. Figure 6 As described above, the lower frame 210 has an open upper surface (z-axis direction), and in a state where the battery cell stack is inserted onto the bottom 211 of the lower frame 210, the upper frame 220 can cover the open upper surface (z-axis direction) of the lower frame 210. The lower frame 210 and the upper frame 220 can be coupled by a method such as welding.

[0076] At this time, according to the present embodiment, since the connection part 400 is attached to the upper frame 220 , the lower frame 210 and the upper frame 220 are coupled while the connection part 400 can be located on the battery cell stack.

[0077] Unlike the conventional battery module, in the present embodiment, the connection part 400 may be formed of a flexible flat cable (FFC), a cover plate on the connection part 400 may be removed, and the connection part 400 may be directly attached to the upper frame 220. Therefore, the upper frame 220 and the connection part 400 may be assembled simultaneously to complete the battery module, thereby improving manufacturing processability.

[0078] Since the connection portion 400 is assembled in a state of being attached to the upper frame 220 , it is possible to reduce the possibility that the connection portion 400 is incorrectly located out of a predetermined position on the battery cell stack during an assembly process.

[0079] In addition, since the bonding member 500 in the present embodiment has a much thinner thickness than the conventional cover plate, the height of the completed battery module can be reduced, thereby increasing the energy density of the battery module itself and ensuring the installation space for the battery module. Therefore, when such a battery module or battery pack is installed in a vehicle, it can bring about the effect of improving the running performance.

[0080] Furthermore, since the weight of the battery module is reduced by removing the cover plate, utilization of the battery module can be improved, and when the battery module is installed in a vehicle, fuel efficiency can be improved.

[0081] Figure 7 It is observed from above Figure 2A top view of a connection portion included in a battery module, Figure 8 yes Figure 7 Magnified view of portion “C” in FIG.

[0082] refer to Figure 7 and Figure 8 , the connection portion 400 may be formed to be parallel to the length direction (x-axis direction) of the plurality of battery cells 100, so that the connection portion 400 may extend in a straight line shape between the busbar frames 300. Thus, the length of the connection portion 400 can be minimized, the cost of manufacturing the connection portion can be reduced, and when connected to the busbar frame 300, the connection portion 400 can be easily connected in a vertical direction.

[0083] Meanwhile, although not specifically shown, an insulating film (not shown) may be formed on the upper surface of the stack of battery cells 100 , and the connection part 400 may be located on the insulating film (not shown).

[0084] At the same time, according to this embodiment, the connecting part 400 may include: a connecting body 410, which is located on the upper surface of the battery cell 100 stack; a connecting cable 420, which is formed in a curved shape at both ends of the connecting body 410, respectively, in the direction of the first bus bar frame 310 and the second bus bar frame 320; and a connecting part connector 430, which is connected to the connecting cable 420 and is respectively connected to the bus bar frames 300.

[0085] In the following, reference will be made to Figures 9 to 11 Configurations of a first connection cable, a second connection cable, and a third connection cable and a connection cable connector according to an embodiment of the present disclosure are described.

[0086] Fig. 9 is a view of a connection cable according to an embodiment of the present disclosure viewed from above. Fig.10 is a view of a connection cable according to one embodiment of the present disclosure viewed from the front. Fig.11 is a view showing a state in which a connection cable is installed on a bus bar frame according to one embodiment of the present disclosure.

[0087] refer to Figures 9 to 11, the connection cable 420 may include: a first connection cable 421 formed in a downward direction; a second connection cable 422 formed in a bent shape from the first connection cable 421 in one direction in the stacking direction of the battery cells 100; and a third connection cable 423 formed in a bent shape from the second connection cable 422 in the other direction in the stacking direction of the battery cells 100. The connection cable 420 is formed in a flexible flat shape and can be installed by bending around a flat surface.

[0088] The connection portion connector 430 is connectable to the third connection cable 423 and is coupled to a connection member 440 formed on one side of the busbar frame 300. More specifically, the connection member 440 is formed on the opposite side of the second connection cable 422 based on the first connection cable 421, and the third connection cable 423 is formed to be longer than the second connection cable 422.

[0089] Therefore, the connection cable 420 connected to the connection body 410 first extends through the first connection cable 421 in the lower vertical direction along the frame surface of the busbar frame 300, and when reaching the height where the connection member 440 is located, the connection cable 420 is bent at 90 degrees via the second connection cable 422 and horizontally extends in the opposite direction of the connection member 440. After the second connection cable 422 is extended by a predetermined length, the second connection cable 422 can be bent at 180 degrees via the third connection cable 423 and horizontally extend in the direction where the connection member 440 is located.

[0090] In addition, the total length of the second connection cable 422 and the third connection cable 423 may be longer than the distance between the first connection cable 421 and the connection member 440. The connection cable 420 forms a curved portion in this way, and the second connection cable 422 and the third connection cable 423 ensure additional length, so that when the connection portion 400 is pulled, the electrical connection route between the bus bars can be stably operated.

[0091] In the following, reference Figure 12 to Figure 14 , an upper frame 220 having a groove 221 formed therein will be described as a modified embodiment of the present disclosure.

[0092] Fig.12 is a perspective view showing a connection portion and an upper frame having a groove formed therein. Fig.13 It is shown Fig.12 A three-dimensional view of a state in which the connecting portion and the upper frame are turned upside down. Fig.14 It is along Fig.12A cross-sectional view taken along the cutting line BB'.

[0093] refer to Figure 12 to Figure 14 A groove 221 concave in a shape corresponding to the connection part 400 is formed on the lower surface of the upper frame 220 a , and the connection part 400 may be attached to the groove 221 .

[0094] In particular, since the bonding member 500 is located between the inner surface of the groove 221 and the connection part 400, the connection part 400 can be attached to the groove 221. In this case, the bonding member 500 may include a material having bonding properties, and may be a double-sided tape.

[0095] The groove 221 may be concave in a shape corresponding to the connection part 400, but in order to facilitate the attachment of the connection part 400, the width of the concave part is preferably slightly longer than the width of the connection part 400. Here, the width of the concave part and the width of the connection part 400 refer to the length in the y-axis direction.

[0096] After the shape of the groove 221 is previously set in the upper frame 220a, the connection part 400 is assembled to the battery cell stack and the lower frame 210 in a state of being attached to the groove 221. Therefore, when manufacturing a battery module, it is easy to arrange the connection part 400 at a predetermined position without error.

[0097] In addition, since the height of the completed battery module can be further reduced by the inner recess, the structure of the groove 221 can further improve the energy density and space efficiency of the battery module.

[0098] The one or more battery modules according to the present embodiment described above may be mounted together with various control and protection systems such as a battery management system (BMS) and a cooling system to form a battery pack.

[0099] The battery module or battery pack can be applied to various devices. These devices can be applied to transportation tools such as electric bicycles, electric vehicles, hybrid vehicles, but the present disclosure is not limited thereto and can be applied to various devices that can use secondary batteries.

[0100] Although the preferred embodiments of the present disclosure have been described in detail above, the scope of the present disclosure is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concepts of the present disclosure defined in the appended claims also belong to the scope of rights.

[0101] Description of Reference Numerals

[0102] 100: Battery module

[0103] 210: Lower frame

[0104] 220, 220a: Upper frame

[0105] 221: Groove

[0106] 300: Busbar frame

[0107] 310: First busbar frame

[0108] 320: Second busbar frame

[0109] 311, 312: End plate

[0110] 400: Connection

[0111] 410: Connection subject

[0112] 420: Connect the cables

[0113] 421: First connection cable

[0114] 422: Second connection cable

[0115] 423: Third connection cable

[0116] 430: Connector

[0117] 440: Connecting components

[0118] 500: Bonding components

Claims

1. A battery module, comprising: a battery cell stack in which a plurality of battery cells are stacked; a lower frame covering a lower surface and two side surfaces of the battery cell stack; an upper frame, the upper frame covering an upper surface of the battery cell stack; bus bar frames formed on the front and rear surfaces of the battery cell stack, respectively; and A connecting portion, the connecting portion connecting the busbar frame and comprising: a connecting body, the connecting body being located on an upper surface of the battery cell stack; a connection cable formed in a bent shape from both ends of the connection body toward the bus bar frame; and connecting portion connectors connected to the connecting cables and respectively coupled to the busbar frames, wherein the connection portion is formed by a flexible flat cable and is attached to the upper frame, wherein a bonding member is located between the connection portion and the upper frame so that the connection portion is attached to the upper frame, the connection portion being located between the upper frame and the battery cell stack, The lower frame has an open upper surface, and in a state where the battery cell stack is inserted onto the bottom of the lower frame, the upper frame can cover the open upper surface of the lower frame, and the lower frame and the upper frame are coupled.

2. The battery module according to claim 1, wherein: The bonding member is a double-sided tape.

3. The battery module according to claim 1, wherein: The connection portion is formed in a flexible flat shape.

4. The battery module according to claim 1, wherein: The connection portion connector is coupled to a connection member formed in the busbar frame.

5. The battery module according to claim 1, wherein: A groove concave in a shape corresponding to the connection portion is formed on a lower surface of the upper frame, and the connection portion is attached to the groove.

6. The battery module according to claim 5, wherein: A bonding member is located between the connecting portion and an inner surface of the groove.

7. The battery module according to claim 1, wherein: The connection portion is formed parallel to a length direction of one battery cell among the plurality of battery cells.

8. The battery module according to claim 1, wherein: The connection portion extends in a straight line shape between the bus bar frames.

9. A battery pack comprising one or more battery modules according to any one of claims 1 to 8.

Images