Bus bar and battery pack

Abstract

The invention discloses a bus bar and a battery pack. The battery pack includes: a housing; a plurality of first battery cells each including a first positive electrode terminal and a first negative electrode terminal; a plurality of second battery cells each including a second positive electrode terminal and a second negative electrode terminal; a first bus bar connecting first negative electrode terminals of the plurality of first battery cells; a second bus bar connecting second positive electrode terminals of the plurality of second battery cells; and a third bus bar connecting the first positive electrode terminal of the first battery cell and the second negative electrode terminal of the second battery cell, at least one of the first bus bar, the second bus bar, and the third bus bar being deformable according to positions of the first battery cell and the second battery pack.

Description

Technical Field

[0001] Various aspects of embodiments of this disclosure relate to busbars and battery packs. Background Technology

[0002] Generally speaking, with the rapid increase in demand for portable electronic products such as laptops, cameras, and mobile phones, and the serious commercialization of robots and electric vehicles, research on high-performance rechargeable and rechargeable batteries is actively underway. In particular, lithium rechargeable batteries are widely used as the energy source for various electronic products due to their high energy density, operating voltage, and excellent state of health (SOH) characteristics.

[0003] In lithium secondary batteries, a cylindrical secondary battery includes an electrode assembly with a cylindrical shape, a cylindrical can containing the electrode assembly and electrolyte, and a cover assembly connected to an opening in the can to seal the can and allow current generated in the electrode assembly to flow to an external device. The cylindrical secondary battery has a structure in which the negatively charged can and the positively charged cover assembly are insulated from each other by a gasket.

[0004] If cylindrical secondary batteries form a group, the weld seams connecting to the electrode connectors or controller can be placed horizontally relative to the longitudinal direction of the cylindrical secondary batteries or parallel to the main body direction. Here, maintaining flatness is desirable during laser welding or resistance welding.

[0005] The above information disclosed in the technology that forms the background of this disclosure is provided to improve the understanding of the background of this disclosure, and therefore may include information that does not constitute related technology. Summary of the Invention

[0006] According to one aspect of the embodiments of the present disclosure, a busbar and a battery pack are provided that can ensure the flatness of the weld in a process of connecting multiple cylindrical battery cells in series and in parallel, and improve the process manufacturability and productivity.

[0007] The above and other aspects and features of this disclosure will be apparent from the following description of some embodiments of this disclosure, or from the following description of some embodiments of this disclosure.

[0008] According to one or more embodiments of the present disclosure, the busbar includes: a first parallel connecting member; and a first parallel extending member extending from the first parallel connecting member in a first direction, wherein the first parallel connecting member includes a first parallel center plate, a first parallel connecting plate extending from the first parallel center plate in a second direction intersecting the first direction, and a first connecting adjustment member formed on the first parallel connecting plate to adjust its length in the second direction.

[0009] The first connecting adjustment component can limit the U-shaped or V-shaped bend.

[0010] The first parallel extension member may include: a first parallel side plate connected to the first parallel connecting member and arranged parallel to the first direction; a first parallel upper plate extending from the first parallel side plate and arranged to intersect the first parallel side plate; and a first side plate adjusting member formed on the first parallel side plate to adjust its length in the first direction.

[0011] The first side panel adjustment component can be bent in a zigzag shape.

[0012] According to one or more embodiments of the present disclosure, a battery pack includes: a housing; a plurality of first battery cells housed in the housing, each including a first positive electrode terminal and a first negative electrode terminal; a plurality of second battery cells housed in the housing, each including a second positive electrode terminal and a second negative electrode terminal; a first busbar connecting the first negative electrode terminals of the plurality of first battery cells; a second busbar connecting the second positive electrode terminals of the plurality of second battery cells; and a third busbar connecting the first positive electrode terminals of the plurality of first battery cells and the second negative electrode terminals of the plurality of second battery cells, wherein at least one of the first busbar, the second busbar, and the third busbar is deformable according to the positions of the plurality of first battery cells and the plurality of second battery cells.

[0013] The first positive electrode terminal and the second negative electrode terminal can be configured to face one side in the first direction, and the first negative electrode terminal and the second positive electrode terminal can be configured to face the other side in the first direction.

[0014] The first busbar may include: a first parallel connecting member that connects adjacent first negative electrode terminals in parallel; and a first parallel extending member that extends from the first parallel connecting member in a first direction.

[0015] Multiple first battery cells may be arranged in a second direction intersecting the first direction, and the first parallel connecting component may include a first parallel center plate, a first parallel connecting plate extending from the first parallel center plate parallel to the second direction and connected to the first negative electrode terminal, and a first connecting adjustment component formed on the first parallel connecting plate to adjust its length in the second direction.

[0016] The first connecting adjustment component can limit the U-shaped or V-shaped bend.

[0017] The first parallel extension member may include: a first parallel side plate connected to the first parallel connecting member and arranged parallel to the first direction; a first parallel upper plate extending from the first parallel side plate and arranged to intersect the first parallel side plate; and a first side plate adjusting member formed on the first parallel side plate to adjust its length in the first direction.

[0018] The first side panel adjustment component can be bent in a zigzag shape.

[0019] The second busbar may include: a second parallel connecting member that connects adjacent second positive electrode terminals in parallel; and a second parallel extending member that extends from the second parallel connecting member in a first direction.

[0020] Multiple second battery cells may be arranged in a second direction intersecting the first direction, and the second parallel connecting component may include a second parallel center plate, a second parallel connecting plate extending from the second parallel center plate parallel to the second direction and connected to the second positive electrode terminal, and a second connecting adjustment component formed on the second parallel connecting plate to be adjustable in length in the second direction.

[0021] The second connecting adjustment component can limit the U-shaped or V-shaped bend.

[0022] The second parallel extension member may include: a second parallel side plate connected to the second parallel connecting member and arranged parallel to the first direction; a second parallel upper plate extending from the second parallel side plate and arranged to intersect the second parallel side plate; and a second side plate adjusting member formed on the second parallel side plate to adjust its length in the first direction.

[0023] The second side panel adjustment component can be bent in a zigzag shape.

[0024] The third busbar may include: a plurality of third series components connected in series to the first positive electrode terminal and the second negative electrode terminal; a third connecting component connecting the plurality of third series components; and one or more third adjusting components on the third connecting component with an adjustable length in a second direction intersecting the first direction.

[0025] Multiple first battery cells and multiple second battery cells may be arranged to face each other in a third direction intersecting with the first and second directions, and each of the third series components may include a third series center plate, a third series connecting plate extending from the third series center plate parallel to the third direction and connected to each of the first positive electrode terminal and the second negative electrode terminal, and a third connecting adjustment member formed on the third series connecting plate to be adjustable in length in the third direction.

[0026] The third adjustment component can limit the U-shaped or V-shaped bend.

[0027] The battery pack may further include an elastic member provided in the housing and supporting a plurality of first battery cells and a plurality of second battery cells to compensate for the height of the plurality of first battery cells and a plurality of second battery cells. Attached Figure Description

[0028] The accompanying drawings illustrate some embodiments of this disclosure and further describe aspects and features of this disclosure together with the detailed description thereof. However, this disclosure should not be construed as limited to the drawings.

[0029] Figure 1 A view of a busbar according to an embodiment of the present disclosure is shown for illustrative purposes.

[0030] Figure 2 A top view of a first parallel connecting member according to an embodiment of the present disclosure is shown for illustrative purposes.

[0031] Figure 3 A side view of a first parallel connecting member according to an embodiment of the present disclosure is shown for illustrative purposes.

[0032] Figure 4 A side view of a first parallel extension member according to an embodiment of the present disclosure is shown for illustrative purposes.

[0033] Figure 5 A view of a battery pack according to an embodiment of the present disclosure is shown for illustrative purposes.

[0034] Figure 6 A front perspective view of the interior of a battery pack according to an embodiment of the present disclosure is shown for illustrative purposes.

[0035] Figure 7 A bottom perspective view of the interior of a battery pack according to an embodiment of the present disclosure is shown for illustrative purposes.

[0036] Figure 8 A view of a second busbar according to an embodiment of the present disclosure is shown for illustrative purposes.

[0037] Figure 9 A top view of a second parallel connecting member according to an embodiment of the present disclosure is shown for illustrative purposes.

[0038] Figure 10 A side view of a second parallel connecting member according to an embodiment of the present disclosure is shown for illustrative purposes.

[0039] Figure 11 A side view of a second parallel extension member according to an embodiment of the present disclosure is shown for illustrative purposes.

[0040] Figure 12 A perspective view of a third busbar according to an embodiment of the present disclosure is shown for illustrative purposes.

[0041] Figure 13 A top view of a third busbar according to an embodiment of the present disclosure is shown for illustrative purposes.

[0042] Figure 14 A side view of a third tandem component according to an embodiment of the present disclosure is shown for illustrative purposes.

[0043] Figure 15 A side view of a third connecting member according to an embodiment of the present disclosure is shown for illustrative purposes.

[0044] Figure 16 A perspective view of a block according to an embodiment of the present disclosure is shown for illustrative purposes.

[0045] Figure 17 This is a view of an embodiment of the present disclosure in which an elastic member is included in a battery pack.

[0046] Figure 18 This is a view of a connector included in a battery pack according to an embodiment of the present disclosure.

[0047] Figure 19 A perspective view illustrating the state of the welded and joined body according to an embodiment of the present disclosure.

[0048] Figure 20 A cross-sectional view illustrating the state of the welded and joined body according to an embodiment of the present disclosure. Detailed Implementation

[0049] In this document, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The terms or words used in this specification and claims should not be construed as limited to their general or dictionary meanings, and based on the principle that the inventor can be his / her own lexicographer to appropriately define terms and concepts, they should be interpreted as having meanings and concepts consistent with the technical spirit of the present disclosure.

[0050] The embodiments described in this specification and the configurations illustrated in the accompanying drawings are provided as some exemplary embodiments of this disclosure and do not necessarily represent all technical ideas, aspects, and features of this disclosure. Therefore, it should be understood that various equivalents and modifications may exist to replace or modify the embodiments described herein at the time of filing this application.

[0051] It should be understood that when an element or layer is referred to as being "on," "connected to," or "linked to" another element or layer, it may be directly on, connected to, or linked to the other element or layer, or one or more intermediary elements or layers may be present. When an element or layer is referred to as being "directly on," "directly connected to," or "directly linked to" another element or layer, no intermediary element or layer is present. For example, when a first element is described as being "linked" or "connected" to a second element, the first element may be directly linked to or connected to the second element, or the first element may be indirectly linked to or connected to the second element via one or more intermediary elements.

[0052] In the accompanying drawings, the dimensions of various elements, layers, etc., may be enlarged for clarity. The same reference numerals denote the same or similar elements. As used herein, the term "and / or" includes any and all combinations of one or more of the associated enumerated items. Furthermore, the use of "may" in describing embodiments of this disclosure refers to "one or more embodiments of this disclosure." Expressions such as "at least one of..." and "any one of..." modify the entire list of elements, not just individual elements, when preceding / following a list of elements. When phrases such as "at least one of A, B, and C," "at least one of A, B, or C," "at least one selected from the group of A, B, and C," or "at least one selected from A, B, and C" are used to denote a list of elements A, B, and C, the phrase may refer to any and all suitable combinations or subsets of A, B, and C, such as A, B, C, A and B, A and C, B and C, or A and B and C. As used herein, the term "use / using / used" may be considered synonymous with the term "utilize / utilizing / utilized." As used herein, the terms “substantially,” “about,” and similar terms are used as approximations rather than terms of degree and are intended to describe the inherent variations in measured or calculated values ​​that would be recognized by one of ordinary skill in the art.

[0053] It will be understood that although the terms “first,” “second,” “third,” etc., may be used herein to describe various elements, components, areas, layers, and / or segments, these elements, components, areas, layers, or segments should not be limited by these terms. These terms are used to distinguish one element, component, area, layer, or segment from another. Therefore, the first element, component, area, layer, or segment discussed below may be referred to as the second element, component, area, layer, or segment without departing from the teachings of the exemplary embodiments.

[0054] For ease of description, spatial relative terms, such as “below,” “under,” “down,” “above,” and “above,” are used herein to describe the relationship of one element or feature to another element or feature illustrated in the figures. It will be understood that, in addition to the orientations depicted in the figures, spatial relative terms are intended to cover different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as “below” or “under” other elements or features will be oriented “above” or “above” other elements or features. Thus, the term “below” can cover both above and below orientations. The device may be oriented in other ways (e.g., rotated 90 degrees or otherwise), and the spatial relative descriptors used herein should be interpreted accordingly.

[0055] The terminology used herein is for describing embodiments of this disclosure and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form “a / an” as used herein is intended to include the plural form as well. It will be further understood that the term “includes / including / comprises / comprising,” when used in this specification, indicates the presence of said features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0056] Furthermore, any numerical range disclosed and / or set forth herein is intended to include all subranges with the same numerical precision contained within the set forth range. For example, the range “1.0 to 10.0” is intended to include all subranges between the stated minimum value of 1.0 and the stated maximum value of 10.0 (and including both the stated minimum value of 1.0 and the stated maximum value of 10.0), i.e., a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as, for example, 2.4 to 7.6. Any maximum numerical limit set forth herein is intended to include all lower numerical limits contained herein, and any minimum numerical limit set forth in this specification is intended to include all higher numerical limits contained herein. Therefore, the applicant reserves the right to amend this specification (including the claims) to expressly set forth any subranges contained within the range expressly set forth herein.

[0057] Referring to two compared elements, features, etc., as “identical” can mean that they are identical or substantially identical. Therefore, the phrase “identical” or “substantially identical” can include situations in the art where the deviation is considered low, for example, a deviation of less than 5%. Additionally, when a parameter is described as uniform in a given region, this can mean that it is uniform in terms of average value.

[0058] Throughout the instruction manual, unless otherwise stated, each element may be singular or plural.

[0059] When any element is referred to as being arranged (or positioned or placed) "above (or below)" or "on top (below)" of a component, it may mean that the element is positioned to contact the upper (or lower) surface of the component, and may also mean that another component may be located between the component and any element arranged (or positioned or placed) on (or below) the component.

[0060] Furthermore, it will be understood that when an element is referred to as "connected," "linked," or "attached" to another element, these elements may be directly "connected," "linked," or "attached" to each other, or one or more intermediary elements may exist therein, through which the elements may be "connected," "linked," or "attached" to another element. Additionally, when a component is referred to as being "electrically connected" to another component, the component may be directly electrically connected to the other component, or one or more intermediary elements may exist therein, such that the component and the other component are indirectly electrically connected to each other.

[0061] Throughout the instruction manual, unless otherwise stated, when “A and / or B” is mentioned, it means A, B, or A and B. That is, “and / or” includes any or all combinations of the listed items. Unless otherwise indicated, when “C to D” is mentioned, it means above C and below D.

[0062] The terminology used in this specification is for describing embodiments of this disclosure and is not intended to limit this disclosure.

[0063] In describing the various embodiments of this disclosure below, repeated descriptions of components that are identical or corresponding to each other across the various embodiments may be omitted. For example, when a configuration identical or corresponding to a configuration disclosed in one embodiment is disclosed in another embodiment, the description of the corresponding configuration may be omitted in the description of that other embodiment, and the configuration different from that one embodiment may be described primarily.

[0064] Figure 1 For illustrative purposes, a view of a busbar according to an embodiment of the present disclosure is shown. Figure 2 A top view of a first parallel connecting member according to an embodiment of the present disclosure is shown for illustrative purposes. Figure 3 A side view of a first parallel connecting member according to an embodiment of the present disclosure is shown for illustrative purposes; and Figure 4 A side view of a first parallel extension member according to an embodiment of the present disclosure is shown for illustrative purposes.

[0065] refer to Figures 1 to 4 The busbar 40 may include a first parallel connecting member 41 and a first parallel extension member 42.

[0066] The first parallel connecting member 41 may form the exterior of one side of the busbar 40 and may support the first parallel extension member 42. The first parallel connecting member 41 may provide an electrical connection between the busbar 40 and an electronic device such as a battery cell.

[0067] The first parallel extension member 42 may extend from the first parallel connecting member 41 in a first direction. The first direction is based on Figure 1It can indicate a direction parallel to the z-axis and extending upwards. In one embodiment, the first parallel extension member 42 may be integrally formed with the first parallel connection member 41 and may be electrically connected or electrically connected to its surface. In one embodiment, a portion of the first parallel extension member 42 may be electrically connected to a circuit board, such as a protection circuit module (PCM) or a battery management system (BMS).

[0068] The first parallel connecting component 41 may include a first parallel center plate 411, a first parallel connecting plate 412, and a first connecting adjustment component 413.

[0069] The first parallel center plate 411 may form the appearance of the central portion of the first parallel connecting member 41. In one embodiment, the first parallel center plate 411 may have the form of a flat plate perpendicular to the first direction.

[0070] One or more first parallel connecting plates 412 may extend from the first parallel center plate 411 parallel to a second direction intersecting the first direction. In one embodiment, the second direction is based on... Figure 1 The direction can be indicated parallel to the y-axis. That is, the first parallel connecting plate 412 can extend from both sides or opposite sides of the first parallel center plate 411, and can have a length along the y-axis. Two first parallel connecting plates 412 can extend from both sides or opposite sides of the first parallel center plate 411, and can be connected to the first negative electrode terminal 22 (e.g., Figure 7 (As shown in the diagram). The first parallel connecting plate 412 may each include a first plate 4121 and a second plate 4122. The first plate 4121 may extend from the first parallel center plate 411, and the second plate 4122 may extend from the first plate 4121.

[0071] A first connecting adjustment member 413 may be formed on a first parallel connecting plate 412 and its length may be adjustable in a second direction. The first connecting adjustment member 413 may have a bent shape with adjustable height. In one embodiment, the first connecting adjustment member 413 may be formed during the molding process of the first parallel connecting plate 412. In another embodiment, the first connecting adjustment member 413 may be formed through a post-processing step after molding the first parallel connecting plate 412.

[0072] With the first connecting adjustment member 413 as the boundary, a first plate 4121 extending from the first parallel center plate 411 can be disposed on one side, and a second plate 4122 can be disposed on the other side. In one embodiment, the first connecting adjustment member 413 can be configured to tilt upward from the first plate 4121. Thus, the second plate 4122 can be disposed higher than the first plate 4121. The height of the first plate 4121 can be adjusted by adjusting the tilt angle of the first connecting adjustment member 413.

[0073] In one embodiment, the first connecting adjustment member 413 may form a U-shaped bend or a V-shaped bend. This bending structure of the first connecting adjustment member 413 allows for height adjustment by deformation due to external force.

[0074] The first parallel extension component 42 may include a first parallel side plate 421, a first parallel upper plate 422, and a first side plate adjustment component 423.

[0075] The first parallel side plate 421 can be connected to the first parallel connecting member 41 and can be arranged parallel to the first direction. The first parallel side plate 421 can extend upward from the first parallel center plate 411 along the z-axis direction. The length of the first parallel side plate 421 can correspond to the first battery cell 20 (e.g., ...). Figure 5 The vertical length (as shown in the figure).

[0076] The first parallel upper plate 422 may extend from the first parallel side plate 421, may protrude in the direction intersecting with the first parallel side plate 421, and may be disposed on the first battery cell 20. The first parallel upper plate 422 may extend from the upper end of the first parallel side plate 421 in the x-axis direction. A portion of the first parallel upper plate 422 may be a welding target area.

[0077] One or more first side plate adjusting members 423 may be formed on the first parallel side plate 421 and may have a bent shape to adjust the length in a first direction. The first side plate adjusting members 423 may be formed on at least one of the upper and lower ends of the first parallel side plate 421.

[0078] In one embodiment, the first side panel adjusting member 423 may have a shape with multiple bends. For example, the first side panel adjusting member 423 may be formed in a zigzag shape. In one embodiment, the first side panel adjusting member 423 may be bent two or three times.

[0079] The first side plate lower adjustment member 4231, located at the lower end of the first parallel side plate 421, may have a shape that is bent to have an overlapping portion along the x-axis direction, thereby allowing the length of the first parallel side plate 421 to be adjustable.

[0080] The adjusting member 4232 on the first side plate 421, which is located on the upper end of the first parallel side plate 421, may have a shape that is bent to have an overlapping portion along the z-axis direction, thereby allowing the length of the first parallel side plate 421 to be adjustable or allowing the height of the first parallel upper plate 422 to be adjustable.

[0081] Figure 5 A view of a battery pack according to an embodiment of the present disclosure is shown for illustrative purposes. Figure 6 For illustrative purposes, a front perspective view of the interior of a battery pack according to an embodiment of the present disclosure is shown; and Figure 7A bottom perspective view of the interior of a battery pack according to an embodiment of the present disclosure is shown for illustrative purposes. (See reference...) Figures 5 to 7 According to an embodiment of the present disclosure, a battery pack 1 includes a housing 10, a first battery cell 20, a second battery cell 30, a first busbar 40, a second busbar 50, and a third busbar 60.

[0082] The housing 10 may have the shape of a container with an open top. In one embodiment, the housing 10 may be made of a resin material. A plurality of first battery cells 20 and a plurality of second battery cells 30 may be embedded in or housed within the housing 10. In one embodiment, a plurality of housings 10 may be arranged sequentially.

[0083] Multiple first battery cells 20 may be embedded or housed within the housing 10. In one embodiment, an electrode assembly having a core form may be embedded or housed in each of the first battery cells 20, and each of the first battery cells 20 may be a cylindrical secondary battery having a vertical length in a first direction (i.e., the z-axis direction). A first positive electrode terminal 21 and a first negative electrode terminal 22 may be provided in each of the first battery cells 20. The first positive electrode terminal 21 may be connected to or connected to a positive electrode current collector of the electrode assembly, and the first negative electrode terminal 22 may be connected to or connected to a negative electrode current collector of the electrode assembly.

[0084] When two adjacent first battery cells 20 are configured to each have a length in a first direction, the first positive electrode terminal 21 may be configured to face one side in the first direction, and the first negative electrode terminal 22 may be configured to face the other side in the first direction. That is, when the first battery cell 20 is upright along the z-axis, the first positive electrode terminal 21 may be disposed on the upper part, and the first negative electrode terminal 22 may be disposed on the lower part.

[0085] Multiple second battery cells 30 may be embedded or housed within the housing 10. In one embodiment, an electrode assembly having a core form may be embedded or housed in each of the second battery cells 30, and each of the second battery cells 30 may be a cylindrical secondary battery having a vertical length in the z-axis direction. A second positive electrode terminal 31 and a second negative electrode terminal 32 may be provided in each of the second battery cells 30. The second positive electrode terminal 31 may be connected to or connected to the positive electrode current collector of the electrode assembly, and the second negative electrode terminal 32 may be connected to or connected to the negative electrode current collector of the electrode assembly.

[0086] When two adjacent second battery cells 30 are configured to each have a length in a first direction, the second negative electrode terminal 32 can be configured to face one side in the first direction, and the second positive electrode terminal 31 can be configured to face the other side in the first direction. That is, when the second battery cell 30 is upright along the z-axis, the second negative electrode terminal 32 can be disposed on the upper part, and the second positive electrode terminal 31 can be disposed on the lower part.

[0087] based on Figure 6 Multiple first battery cells 20 may be arranged in a second direction intersecting the first direction. Multiple second battery cells 30 may be arranged in a second direction intersecting the first direction. Two first battery cells 20 may be configured to face each other in the second direction intersecting the first direction (i.e., along the y-axis), and two second battery cells 30 may be configured to face each other in the second direction intersecting the first direction (i.e., along the y-axis). Two first battery cells 20 and two second battery cells 30 may be configured to face each other in a third direction intersecting the second direction (i.e., along the x-axis).

[0088] The first busbar 40 can be connected to the first negative electrode terminal 22 provided on a plurality of first battery cells 20. The first busbar 40 can be connected in parallel to a pair of first battery cells 20. The first busbar 40 can be connected in parallel to the first negative electrode terminal 22 disposed on the lower portion of the first battery cell 20.

[0089] The second busbar 50 can be connected to the second positive electrode terminal 31 provided on a plurality of second battery cells 30. The second busbar 50 can be connected in parallel to a pair of second battery cells 30. The second busbar 50 can be connected in parallel to the second positive electrode terminal 31 disposed on the lower portion of the second battery cell 30.

[0090] The third busbar 60 can connect to a first positive electrode terminal 21 provided on a plurality of first battery cells 20 and a second negative electrode terminal 32 provided on a plurality of second battery cells 30. The third busbar 60 can connect to any one of two first battery cells 20 and any one of two second battery cells 30. The third busbar 60 can connect to another of two first battery cells 20 and yet another of two second battery cells 30.

[0091] In one embodiment, at least one of the first busbar 40, the second busbar 50, and the third busbar 60 may be deformable according to the positions of the plurality of first battery cells 20 and the plurality of second battery cells 30. The first busbar 40, the second busbar 50, and the third busbar 60 are adjustable in length in the x-axis direction, adjustable in length in the y-axis direction, or adjustable in length in the z-axis direction.

[0092] The first busbar 40 can be configured to be the same as the busbar 40 described above. For example, as Figures 1 to 4 For example, the first busbar 40 may include a first parallel connecting member 41 and a first parallel extension member 42.

[0093] The first parallel connecting component 41 can connect two first negative electrode terminals 22 in parallel. The first parallel connecting component 41 can be disposed below two first battery cells 20 and can be connected in parallel to the first negative electrode terminals 22 formed on the lower part of the first battery cell 20.

[0094] The first parallel extension member 42 may extend upward from the first parallel connecting member 41. The first parallel extension member 42 may be disposed at the same height as the third busbar 60. In one embodiment, the first parallel extension member 42 may be integrally formed with the first parallel connecting member 41 and may be electrically connected or attached to its surface. In one embodiment, a portion of the first parallel extension member 42 may be electrically connected or attached to a circuit board, such as a PCM or BMS.

[0095] The first parallel connecting component 41 may include a first parallel center plate 411, a first parallel connecting plate 412, and a first connecting adjustment component 413.

[0096] The first parallel center plate 411 may be disposed below a pair of first battery cells 20. The first parallel center plate 411 may be disposed between the first negative electrode terminals 22 provided on the first battery cells 20.

[0097] One or more first parallel connecting plates 412 may extend from the first parallel center plate 411 parallel to a second direction and may be connected to or linked to the first negative electrode terminal 22. That is, the first parallel connecting plates 412 may extend from both sides or opposite sides of the first parallel center plate 411 and may have a length along the y-axis direction. Two first parallel connecting plates 412 may extend from both sides or opposite sides of the first parallel center plate 411 and may be connected to or linked to the first negative electrode terminal 22. Each of the first parallel connecting plates 412 may include a first plate 4121 and a second plate 4122. The first plate 4121 may extend from the first parallel center plate 411, and the second plate 4122 may extend from the first plate 4121.

[0098] A first connecting adjustment member 413 may be formed on a first parallel connecting plate 412 and its length may be adjustable in a second direction. The first connecting adjustment member 413 may have a bent shape with adjustable height. In one embodiment, the first connecting adjustment member 413 may be formed during the molding process of the first parallel connecting plate 412. In another embodiment, the first connecting adjustment member 413 may be formed through a post-processing step after molding the first parallel connecting plate 412.

[0099] With the first connecting adjustment member 413 as the boundary, a first plate 4121 extending from the first parallel center plate 411 can be disposed on one side, and a second plate 4122 connected to the first battery cell 20 can be disposed on the other side. The first connecting adjustment member 413 can be configured to tilt upward from the first plate 4121. In this way, the second plate 4122 can be disposed higher than the first plate 4121. The height of the first plate 4121 can be adjusted by adjusting the tilt angle of the first connecting adjustment member 413.

[0100] In one embodiment, the first connecting adjustment member 413 may form a U-shaped bend or a V-shaped bend. This bending structure of the first connecting adjustment member 413 allows for height adjustment by deformation due to external force.

[0101] The first parallel extension component 42 may include a first parallel side plate 421, a first parallel upper plate 422, and a first side plate adjustment component 423.

[0102] The first parallel side plate 421 can be connected to the first parallel connecting member 41 and can be disposed in the longitudinal direction of the first battery cell 20 parallel to the first direction. The first parallel side plate 421 can extend upward from the first parallel center plate 411 along the z-axis direction. In one embodiment, the length of the first parallel side plate 421 can correspond to the vertical length of the first battery cell 20. The first parallel side plate 421 can be configured to face the space between a pair of adjacent first battery cells 20.

[0103] The first parallel upper plate 422 may extend from the first parallel side plate 421, may protrude in the direction intersecting with the first parallel side plate 421, and may be disposed on the first battery cell 20. The first parallel upper plate 422 may extend from the upper end of the first parallel side plate 421 in the x-axis direction. A portion of the first parallel upper plate 422 may be a welding target area.

[0104] One or more first side plate adjusting members 423 may be formed on the first parallel side plate 421 and may have a bent shape to adjust the length in a first direction. The first side plate adjusting members 423 may be formed on at least one of the upper and lower ends of the first parallel side plate 421.

[0105] In one embodiment, the first side panel adjusting member 423 may have a multi-bend shape. In one embodiment, the first side panel adjusting member 423 may be formed in a zigzag shape. In one embodiment, the first side panel adjusting member 423 may be bent two or three times.

[0106] The first side plate lower adjustment member 4231, which is provided on the lower end of the first parallel side plate 421, may have a shape that is bent to have an overlapping portion along the x-axis direction, thereby allowing the length of the first parallel side plate 421 to be adjustable, or allowing the distance between the first parallel side plate 421 and the first battery cell 20 to be adjustable.

[0107] The adjusting member 4232 on the first side plate 421, which is located on the upper end of the first parallel side plate 421, may have a shape that is bent to have an overlapping portion along the z-axis direction, thereby allowing the length of the first parallel side plate 421 to be adjustable or allowing the height of the first parallel upper plate 422 to be adjustable.

[0108] Figure 8 A view of a second busbar according to an embodiment of the present disclosure is shown for illustrative purposes; and Figure 9 A top view of a second parallel connecting member according to an embodiment of the present disclosure is shown for illustrative purposes. Figure 10 A side view of a second parallel connecting member according to an embodiment of the present disclosure is shown for illustrative purposes; and Figure 11 A side view of a second parallel extension member according to an embodiment of the present disclosure is shown for illustrative purposes. (Refer to...) Figures 6 to 11 In one embodiment, the first busbar 40 and the second busbar 50 may be configured to be symmetrical to each other.

[0109] The second busbar 50 may include a second parallel connecting member 51 and a second parallel extension member 52.

[0110] The second parallel connecting member 51 can connect two second positive electrode terminals 31. The second parallel connecting member 51 can be disposed below two second battery cells 30 and can be connected in parallel to the second positive electrode terminals 31 formed on the lower part of the second battery cells 30.

[0111] The second parallel extension member 52 may extend upward from the second parallel connecting member 51. The second parallel extension member 52 may be positioned at the same height as the third busbar 60. The top end of the second parallel extension member 52 may be the same as the top end of the first parallel extension member 42. In one embodiment, the second parallel extension member 52 may be integrally formed with the second parallel connecting member 51 and may be electrically connected to or attached to its surface. A portion of the second parallel extension member 52 may be electrically connected to or attached to a circuit board, such as a PCM or BMS.

[0112] The second parallel connecting component 51 may include a second parallel center plate 511, a second parallel connecting plate 512, and a second connecting adjustment component 513.

[0113] The second parallel center plate 511 may be disposed below a pair of second battery cells 30. The second parallel center plate 511 may be disposed between the second positive electrode terminals 31 provided on the second battery cells 30.

[0114] One or more second parallel connecting plates 512 may extend from the second parallel center plate 511 parallel to the second direction and may be connected to or linked to the second positive electrode terminal 31. That is, the second parallel connecting plates 512 may extend from both sides or opposite sides of the second parallel center plate 511 and may have a length along the y-axis direction. Two second parallel connecting plates 512 may extend from both sides or opposite sides of the second parallel center plate 511 and may be connected to or linked to the second positive electrode terminal 31. Each of the second parallel connecting plates 512 may include a third plate 5121 and a fourth plate 5122. The third plate 5121 may extend from the second parallel center plate 511, and the fourth plate 5122 may extend from the third plate 5121.

[0115] The second connecting adjustment member 513 may be formed on the second parallel connecting plate 512, and may have an adjustable length in the second direction and a bent shape with an adjustable height. In one embodiment, the second connecting adjustment member 513 may be formed during the molding process of the second parallel connecting plate 512. In another embodiment, the second connecting adjustment member 513 may be formed by post-processing after molding the second parallel connecting plate 512.

[0116] With the second connecting adjustment member 513 as the boundary, a third plate 5121 extending from the second parallel center plate 511 can be disposed on one side, and a fourth plate 5122 connected to the second battery cell 30 can be disposed on the other side. The second connecting adjustment member 513 can be configured to tilt upward from the third plate 5121. In this way, the fourth plate 5122 can be disposed higher than the third plate 5121. The height of the third plate 5121 can be adjusted by adjusting the tilt angle of the second connecting adjustment member 513.

[0117] In one embodiment, the second connecting adjustment member 513 may form a U-shaped bend or a V-shaped bend. This bending structure of the second connecting adjustment member 513 allows for height adjustment by deformation due to external force.

[0118] The second parallel extension component 52 may include a second parallel side plate 521, a second parallel upper plate 522, and a second side plate adjustment component 523.

[0119] The second parallel side plate 521 can be connected to the second parallel connecting member 51 and can be disposed in the longitudinal direction of the second battery cell 30. The second parallel side plate 521 can extend upward from the second parallel center plate 511 along the z-axis direction. The length of the second parallel side plate 521 can correspond to the vertical length of the second battery cell 30. The second parallel side plate 521 can be configured to face the space between a pair of adjacent second battery cells 30.

[0120] The second parallel upper plate 522 may extend from the second parallel side plate 521 and may be disposed on the second battery cell 30. The second parallel upper plate 522 may extend from the upper end of the second parallel side plate 521 in the x-axis direction. A portion of the second parallel upper plate 522 may be a welding target area.

[0121] One or more second side plate adjusting members 523 may be formed on the second parallel side plate 521 and may have a bent shape to adjust the length in a first direction. The second side plate adjusting members 523 may be formed on at least one of the upper and lower ends of the second parallel side plate 521.

[0122] In one embodiment, the second side panel adjusting member 523 may have a multi-bend shape. In one embodiment, the second side panel adjusting member 523 may be formed in a zigzag shape. In one embodiment, the second side panel adjusting member 523 may be bent two or three times.

[0123] The second side plate lower adjustment member 5231, which is provided on the lower end of the second parallel side plate 521, may have a shape that is bent to have an overlapping portion along the x-axis direction, thereby allowing the length of the second parallel side plate 521 to be adjustable, or allowing the distance between the second parallel side plate 521 and the second battery cell 30 to be adjustable.

[0124] The second side plate adjustment member 5232, located on the upper end of the second parallel side plate 521, may have a shape that is bent to have an overlapping portion along the z-axis direction, thereby allowing the length of the second parallel side plate 521 to be adjustable or allowing the height of the second parallel upper plate 522 to be adjustable.

[0125] Figure 12 A perspective view of a third busbar according to an embodiment of the present disclosure is shown for illustrative purposes; and Figure 13 A top view of a third busbar according to an embodiment of the present disclosure is shown for illustrative purposes. Figure 14 A side view of a third tandem component according to an embodiment of the present disclosure is shown for illustrative purposes; and Figure 15 A side view of a third connecting member according to an embodiment of the present disclosure is shown for illustrative purposes. (See also:) Figure 6 and Figures 12 to 15 In one embodiment, the third busbar 60 includes a third serial component 61, a third connecting component 62, and a third adjusting component 63.

[0126] In one embodiment, a pair of third series components 61 may be connected in series to the first positive electrode terminal 21 and the second negative electrode terminal 32. The third series components 61 may be connected in series to the upper portions of the first battery cell 20 and the second battery cell 30 facing each other along the x-axis direction.

[0127] The third connecting member 62 can connect to a pair of third series members 61. The third connecting member 62 can be disposed between the pair of third series members 61. In one embodiment, the third connecting member 62 can be integrally formed with the third series members 61 and can be electrically connected to or attached to their surfaces. In one embodiment, a portion of the third connecting member 62 can be electrically connected to a circuit board, such as a PCM or BMS.

[0128] In one embodiment, the third series component 61 may each include a third series center plate 611, a third series connecting plate 612, and a third connecting adjustment component 613.

[0129] The third series center plate 611 can be disposed on the first battery cell 20 and the second battery cell 30. The third series center plate 611 can be disposed on the space between the first battery cell 20 and the second battery cell 30 facing each other along the x-axis.

[0130] One or more third series connecting plates 612 may extend from the third series center plate 611 to both sides or opposite sides, and may connect to or be connected to the first positive electrode terminal 21 and the second negative electrode terminal 32. Two third series connecting plates 612 may be disposed on both sides or opposite sides of the third series center plate 611 and spaced apart from each other. Two third series connecting plates 612 extending from the third series center plate 611 in a direction opposite to the third third may connect to or be connected to the first positive electrode terminal 21 of the first battery cell 20. Two third series connecting plates 612 extending from the third series center plate 611 upward in a third third may connect to or be connected to the second negative electrode terminal 32 of the second battery cell 30.

[0131] The third connecting adjustment member 613 may be formed on the third series connecting plate 612 and may have a bent shape with adjustable height. In one embodiment, the third connecting adjustment member 613 may be formed during the molding process of the third series connecting plate 612. In another embodiment, the third connecting adjustment member 613 may be formed by post-processing after molding the third series connecting plate 612.

[0132] The third series connecting plate 612 may each include a first connecting plate 6121 and a second connecting plate 6122. With the third connecting adjustment member 613 as the boundary, the first connecting plate 6121 extending from the third series center plate 611 may be disposed on one side, and the second connecting plate 6122 connecting to the first battery cell 20 or the second battery cell 30 may be disposed on the other side. The third connecting adjustment member 613 may be configured to slope downwards from the first connecting plate 6121. Thus, the second connecting plate 6122 may be positioned lower than the first connecting plate 6121. The height of the first connecting plate 6121 can be adjusted by adjusting the tilt angle of the third connecting adjustment member 613.

[0133] One or more third adjusting members 63 may be formed on the third connecting member 62 and may have a bent shape with adjustable height. The third adjusting members 63 may be disposed on the edges of the third connecting member 62 on both sides or opposite sides. That is, the third adjusting members 63 may be disposed on the end of the third connecting member 62 that connects to the third series member 61. The upper surface of the third connecting member 62 disposed between a pair of third adjusting members 63 may be the target area for subsequent welding.

[0134] In one embodiment, the third adjusting member 63 may be molded during the process of molding the third connecting member 62. In another embodiment, the third adjusting member 63 may be formed by a post-processing step after molding the third connecting member 62. In one embodiment, the third adjusting member 63 may each form or define a U-shaped bend or a V-shaped bend. This bending structure of the third adjusting member 63 allows for height adjustment by deformation due to external force.

[0135] Figure 16 A perspective view illustrating a block according to an embodiment of the present disclosure. Reference Figure 6 , Figure 7 and Figure 16 According to an embodiment of the present disclosure, the battery pack 1 may further include a block 70. The block 70 may provide support to separate a plurality of first battery cells 20 and a plurality of second battery cells 30.

[0136] In one embodiment, the block 70 may be molded using a resin material, and the first battery cell 20 and the second battery cell 30 may be separately disposed on the block 70. In another embodiment, two first battery cells 20 and two second battery cells 30 may be disposed on a single block 70.

[0137] Block 70 may include a first block 71, a second block 72, and a third block 73.

[0138] The first block 71 may have a height in a first direction and a length in a second direction intersecting the first direction. The second direction may be... Figure 16 The y-axis direction in the first direction. The second block 72 may have a height in the first direction and a length in a third direction intersecting the second direction. The third direction may be... Figure 16 The x-axis direction in the diagram.

[0139] In one embodiment, the first block 71 and the second block 72 may have the same length and form a cross shape. The first space 711, the second space 712, the third space 713 and the fourth space 714 may be separated by the first block 71 and the second block 72.

[0140] A third block 73 may be formed between the first block 71 and the second block 72, and may accommodate each of the plurality of first battery cells 20 and the plurality of second battery cells 30. In one embodiment, the third block 73 may be integrally formed with the first block 71 and the second block 72, and may protrude into the first space 711, the second space 712, the third space 713, and the fourth space 714. A curved surface corresponding to the surface of each of the first battery cells 20 and the second battery cells 30 may be formed on the third block 73.

[0141] Figure 17 This is a view of an embodiment of the present disclosure in which an elastic member is included in a battery pack. Reference Figure 17 According to an embodiment of the present disclosure, the battery pack 1 may further include an elastic member 80. The elastic member 80 may be provided in the housing 10 and may support the first battery cell 20 and the second battery cell 30 to compensate for their height.

[0142] In one embodiment, the elastic member 80 may comprise a rubber or foam material. When the pressure is a specific (e.g., predetermined) pressure or greater, the elastic member 80 may contract to eliminate or substantially eliminate the height difference between the first battery cell 20 and the second battery cell 30.

[0143] The elastic member 80 may be attached to or coupled to the upper surface of the bottom portion 11 of the housing 10. In one embodiment, two first battery cells 20 and two second battery cells 30 may be disposed on the elastic member 80. The elastic member 80 may apply an external force to at least one or more of the first battery cells 20 and the second battery cells 30 to make their upper sides the same height. That is, the elastic member 80 may compensate for the position of the first battery cells 20 and the second battery cells 30 in the z-axis direction.

[0144] Figure 18 This is a view according to an embodiment of the present disclosure, wherein the connector is included in a battery pack; Figure 19 A perspective view illustrating the state of the connector prior to welding and joining according to an embodiment of the present disclosure; and Figure 20 A cross-sectional view illustrating the state of the connector after welding and joining according to an embodiment of the present disclosure. (See also...) Figures 18 to 20 According to an embodiment of the present disclosure, the battery pack 1 may further include a connector 90.

[0145] In one embodiment, the connector 90 may be disposed on the first busbar 40, the second busbar 50, and the third busbar 60, and may be laser welded thereto. In one embodiment, the top ends of the first busbar 40, the second busbar 50, and the third busbar 60 may be identical, and laser welding of the first busbar 400, the second busbar 50, and the third busbar 60 may be performed simultaneously (e.g., synchronously).

[0146] In one embodiment, the connector 90 may be a circuit board, such as a PCM or BMS. The connector 90 may include a connector substrate 91 and a connector tab 92.

[0147] The connecting substrate 91 may include any of a variety of circuits and may have substrate holes 910 formed therein for laser welding. In one embodiment, the substrate holes 910 may include a pair of first holes 911 adjacent to each other and a second hole 912 disposed between the first holes 911. Connecting tabs 92 may be mounted on the connecting substrate 91 and may contact and be laser welded to the first busbar 40, the second busbar 50, and the third busbar 60.

[0148] The connecting tab 92 can be mounted on the connecting substrate 91 and laser-welded to each of the first busbar 40, the second busbar 50, and the third busbar 60. In one embodiment, the connecting tab 92 may include a first tab 921 covering a first hole 911 and a second tab 922 covering a second hole 912. The first tab 921 may contact a first parallel extension 42 of the first busbar 40 and a second parallel extension 52 of the second busbar 50. The second tab 922 may contact a third connecting member 62 of the third busbar 60.

[0149] With the two first battery cells 20 and the two second battery cells 30 separated and supported by the block 70, the first busbar 40 is connected in parallel to the first negative electrode terminal 22 disposed on the lower part of the first battery cell 20, and the second busbar 50 is connected in parallel to the second positive electrode terminal 31 disposed on the lower part of the second battery cell 30. The third busbar 60 is connected in series to the first positive electrode terminal 21 disposed on the upper part of the first battery cell 20 and the second negative electrode terminal 32 disposed on the upper part of the second battery cell 30. In one embodiment, the third connecting member 62 of the third busbar 60 is disposed between the first parallel extension member 42 of the first busbar 40 and the second parallel extension member 52 of the second busbar 50.

[0150] One or more bending zones are provided on the first busbar 40, the second busbar 50, and the third busbar 60, and the displacement of each of the first busbar 40, the second busbar 50, and the third busbar 60 is adjustable. In one embodiment, the adjustable displacement is such that the upper surfaces of the first parallel extension member 42, the second parallel extension member 52, and the third connecting member 62 are collinear.

[0151] When the heights of the first parallel extension member 42, the second parallel extension member 52, and the third connecting member 62 are matched, the connecting piece 92 mounted on the connecting base plate 91 makes surface contact with each of the first parallel extension member 42, the second parallel extension member 52, and the third connecting member 62.

[0152] In one embodiment, when the connecting piece 92 makes surface contact with each of the first parallel extension member 42, the second parallel extension member 52 and the third connecting member 62, the welding and connection processes can be performed simultaneously (e.g., synchronously) or sequentially by laser welding.

[0153] In a battery pack 1 according to one or more embodiments of the present disclosure, the height of the upper portion of a first busbar 40 that connects a plurality of first battery cells 20 in parallel, a second busbar 50 that connects a plurality of second battery cells 30 in parallel, and a third busbar 60 that connects each of the first battery cells 20 and the second battery cells 30 in series can be adjusted by displacement adjustment to improve the manufacturability of subsequent processes.

[0154] In a battery pack 1 according to one or more embodiments of the present disclosure, when the flatness of the first busbar 40, the flatness of the second busbar 50, and the flatness of the third busbar 60 are matched, even if the connector 90 is placed thereon by an automated process, the contact between the connector 90 and each of the first busbar 40, the second busbar 50, and the third busbar 60 is stably maintained, so that laser welding can be performed without performing additional processes for maintaining the contact state.

[0155] In a battery pack according to one or more embodiments of the present disclosure, the height of the upper portion of a first busbar connecting a plurality of first battery cells in parallel, a second busbar connecting a plurality of second battery cells in parallel, and a third busbar connecting each of the first and second battery cells in series can be adjusted by displacement to improve the manufacturability of subsequent processes.

[0156] In a battery pack according to one or more embodiments of the present disclosure, when the flatness of the first busbar, the flatness of the second busbar, and the flatness of the third busbar are matched, even if the connector is placed thereon by an automated process, the contact between the connector and each of the first, second, and third busbars is stably maintained, so that laser welding can be performed without performing additional processes to maintain the contact state.

[0157] However, the aspects and effects that can be obtained through this disclosure are not limited to those described above, and those skilled in the art will clearly understand from the description of this disclosure other technical aspects and effects not mentioned.

[0158] While this disclosure has been described with reference to some embodiments shown in the accompanying drawings, these embodiments are merely illustrative, and it should be understood that those skilled in the art can derive various modifications and other equivalent embodiments based on these embodiments.

Claims

1. A busbar, comprising: First parallel connecting component; as well as A first parallel extension member extends from the first parallel connecting member in a first direction. The first parallel connecting component includes a first parallel center plate, a first parallel connecting plate extending from the first parallel center plate in a second direction intersecting the first direction, and a first connecting adjustment component formed on the first parallel connecting plate to adjust its length in the second direction.

2. The busbar according to claim 1, wherein the first connecting adjustment member defines a U-shaped or V-shaped bend.

3. The busbar according to claim 1, wherein the first parallel extension member comprises: A first parallel side plate is connected to the first parallel connecting component and is arranged parallel to the first direction; A first parallel upper plate extends from the first parallel side plate and is arranged to intersect with the first parallel side plate; as well as A first side plate adjustment component is formed on the first parallel side plate to adjust its length in the first direction.

4. The busbar according to claim 3, wherein the first side plate adjusting member is bent in a zigzag shape.

5. A battery pack, comprising: shell; Multiple first battery cells are housed in the casing and each includes a first positive electrode terminal and a first negative electrode terminal; Multiple second battery cells are housed in the housing and each includes a second positive electrode terminal and a second negative electrode terminal; The first busbar connects to the first negative electrode terminal of the plurality of first battery cells; The second busbar connects to the second positive electrode terminal of the plurality of second battery cells; as well as The third busbar connects the first positive electrode terminal of the plurality of first battery cells and the second negative electrode terminal of the plurality of second battery cells. At least one of the first busbar, the second busbar, and the third busbar is deformable depending on the position of the plurality of first battery cells and the plurality of second battery cells.

6. The battery pack according to claim 5, wherein The first positive electrode terminal and the second negative electrode terminal are configured to face one side in the first direction, and The first negative electrode terminal and the second positive electrode terminal are configured to face the opposite side in the first direction.

7. The battery pack of claim 6, wherein the first busbar comprises: The first parallel connecting component connects the first negative electrode terminals that are adjacent to each other in parallel. as well as A first parallel extension member extends from the first parallel connecting member in the first direction.

8. The battery pack according to claim 7, wherein The plurality of first battery cells are arranged in a second direction intersecting the first direction, and The first parallel connection component includes a first parallel center plate, a first parallel connecting plate extending from the first parallel center plate parallel to the second direction and connected to the first negative electrode terminal, and a first connecting adjustment component formed on the first parallel connecting plate to adjust its length in the second direction.

9. The battery pack of claim 8, wherein the first connection adjustment member defines a U-shaped or V-shaped bend.

10. The battery pack of claim 8, wherein the first parallel extension member comprises: A first parallel side plate is connected to the first parallel connecting component and is arranged parallel to the first direction; A first parallel upper plate extends from the first parallel side plate and is arranged to intersect with the first parallel side plate; as well as A first side plate adjustment component is formed on the first parallel side plate to adjust its length in the first direction.

11. The battery pack of claim 10, wherein the first side plate adjusting member is bent in a zigzag shape.

12. The battery pack of claim 6, wherein the second busbar comprises: The second parallel connecting component connects the second positive electrode terminals that are adjacent to each other in parallel; as well as The second parallel extension member extends from the second parallel connecting member in the first direction.

13. The battery pack according to claim 12, wherein The plurality of second battery cells are arranged in a second direction intersecting the first direction; and The second parallel connection component includes a second parallel center plate, a second parallel connecting plate extending from the second parallel center plate parallel to the second direction and connected to the second positive electrode terminal, and a second connecting adjustment component formed on the second parallel connecting plate to adjust its length in the second direction.

14. The battery pack of claim 13, wherein the second connection adjustment member defines a U-shaped or V-shaped bend.

15. The battery pack of claim 12, wherein the second parallel extension member comprises: The second parallel side plate is connected to the second parallel connecting component and is arranged parallel to the first direction; A second parallel upper plate extends from the second parallel side plate and is arranged to intersect with the second parallel side plate; as well as A second side plate adjustment component is formed on the second parallel side plate to adjust its length in the first direction.

16. The battery pack of claim 15, wherein the second side plate adjusting member is bent in a zigzag shape.

17. The battery pack of claim 6, wherein the third busbar comprises: Multiple third series components are connected in series to the first positive electrode terminal and the second negative electrode terminal; A third connecting component connects the plurality of third serially connected components; as well as One or more third adjustment components are provided on the third connecting component to be adjustable in length in a second direction intersecting the first direction.

18. The battery pack according to claim 17, wherein The plurality of first battery cells and the plurality of second battery cells are arranged to face each other in a third direction intersecting the first direction and the second direction, and Each of the plurality of third series components includes a third series center plate, a third series connecting plate extending from the third series center plate parallel to the third direction and connected to each of the first positive electrode terminal and the second negative electrode terminal, and a third connecting adjustment member formed on the third series connecting plate to be adjustable in length in the third direction.

19. The battery pack of claim 17, wherein the third adjusting member defines a U-shaped or V-shaped bend.

20. The battery pack of claim 5, further comprising an elastic member provided in the housing and supporting the plurality of first battery cells and the plurality of second battery cells to compensate for the height of the plurality of first battery cells and the plurality of second battery cells.

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