Battery module and battery pack comprising same

Abstract

The present invention relates to a battery module and a battery pack comprising the same, the battery module comprising: a battery cell; a side plate facing a side surface of the battery cell and including a protruding portion protruding in a width direction of the battery cell; a cell terminal protruding from the battery cell toward the side plate; a bus bar seat coupled to the side plate and disposed between the side plate and the battery cell; and a bus bar supported by the bus bar seat and connected to the cell terminal. According to the present invention, since a bracket and a cross beam are provided on upper and lower sides of a protruding portion of an adjacent side plate which protects a side surface of a battery cell on which a cell terminal is disposed, and a fixing member fixes the bracket and the cross beam to the side plate, a volumetric energy density and a gravitational energy density of the battery pack can be optimized.

Description

Technical Field

[0001] The present invention relates to a battery module and a battery pack including the battery module. Background Art

[0002] Generally, with the rapidly growing demand for portable electronic products (such as laptop computers, video cameras, and mobile phones) and the commercialization of robots and electric vehicles, active research is being conducted to develop high-performance secondary batteries that can be repeatedly charged / discharged.

[0003] Secondary batteries are widely used in small devices (such as portable electronic products) and medium- and large-sized devices (such as electric vehicles and energy storage systems (ESS)) for power generation and energy storage. In particular, in medium- or large-sized devices, in order to enhance the output and / or capacity of the battery, a plurality of battery cells are electrically connected to each other to form a battery module.

[0004] The above information disclosed in this background art section is provided to enhance the understanding of the background art of the present disclosure, and thus, it may include information that does not constitute related (or prior) art. Summary of the Invention

[0005] The present invention aims to provide a battery module and a battery pack including the battery module that can improve the space utilization rate of the battery pack.

[0006] These and other aspects and features of the present disclosure will be described in the following description of some embodiments of the present disclosure or will be apparent from the following description of some embodiments of the present disclosure.

[0007] According to an aspect of the present invention, there is provided a battery module including: a battery cell; side plates facing side surfaces of the battery cell and including protruding portions protruding in the width direction of the battery cell; cell terminals protruding from the battery cell toward the side plates; a bus bar seat coupled to the side plates and disposed between the side plates and the battery cell; and a bus bar supported by the bus bar seat and connected to the cell terminals.

[0008] The side plates, the cell terminals, and the bus bar seats are respectively provided as pairs of side plates, pairs of cell terminals, and pairs of bus bar seats, and the pairs of side plates, the pairs of cell terminals, and the pairs of bus bar seats may be symmetrically disposed on both sides of the battery cell, respectively.

[0009] The protruding portion may include a first opening, and the bus bar seat may include a second opening communicating with the first opening.

[0010] The bus bar may cover the second opening.

[0011] The battery module may further include a flexible substrate included in the bus bar seat and electrically connected to the bus bar.

[0012] The battery module may further include end plates facing each of the front and rear surfaces of the battery cells.

[0013] According to another aspect of the present invention, there is provided a battery pack including: a housing; battery modules accommodated inside the housing and arranged to be spaced apart from each other in a first direction; crossbeams provided between adjacent battery modules, extending in a second direction and contacting the lower side of the side plates; brackets provided between adjacent battery modules, extending in the second direction and contacting the upper side of the side plates; and fixing members for fixing the brackets and the crossbeams to the side plates.

[0014] The protruding portion may include: a first side body extending from the side plate toward an adjacent side plate and sitting on the crossbeam; a second side body extending from the side plate toward an adjacent side plate and the bracket sitting on the second side body; and a connecting body connecting an end of the first side body and an end of the second side body and including a first opening.

[0015] The crossbeam may include: a base frame sitting in the housing; and a protruding frame protruding from the base frame toward the bracket, and the first side body sitting on the protruding frame.

[0016] The width of the protruding frame may decrease toward the bracket.

[0017] The first side body adjacent to the first and second portions of the protruding frame may sit on the first and second portions. The protruding frame may include a first hole formed between the first and second portions, and the fixing member passes through the first hole.

[0018] The bracket may include: a sitting plate, the lower surface of which sits on the second side bodies adjacent to the lower surface on both sides of the sitting plate, and the sitting plate includes a second hole through which the fixing member passes; a pair of first extension plates extending from both sides of the sitting plate in the height direction of the battery cell; and a second extension plate extending from the pair of first extension plates, covering the sitting plate, and including through holes through which the fixing member passes.

[0019] The through holes may be arranged to be spaced apart from each other in the longitudinal direction of the second extension plate.

[0020] The fixing member may include: a bolt member passing through the bracket and the crossbeam and mounted on the bracket; and a nut member fixed to the crossbeam, and the bolt member is coupled to the nut member.

[0021] The bolt member may include: a head sitting inside the bracket; and a body portion sequentially passing through the bracket and the crossbeam and being screwed to the nut member.

[0022] The housing may include: a container in which the battery module is seated and which includes an opening; and a cover coupled to the container and covering the opening.

[0023] The cover may be bolted to the bracket.

[0024] The battery pack may further include: a first cooling plate disposed between the cover and the battery module; and a second cooling plate disposed between the container and the battery module.

[0025] The first cooling plate may be bolted to the bracket.

[0026] According to an embodiment of the present invention, since the bracket and the cross beam are disposed on the upper and lower sides of the protruding portions of the adjacent side plates that protect the battery cells and where the single cell terminals are disposed herein, and the fixing member fixes the bracket and the cross beam to the side plates, the volumetric energy density and the weight energy density of the battery pack can be optimized. Description of the Drawings

[0027] The drawings attached to this specification illustrate some embodiments of the present disclosure, and further describe aspects and features of the present disclosure together with the detailed description of the present disclosure. However, the present disclosure should not be construed as being limited to the drawings, in which:

[0028] Figure 1 is a schematic perspective view showing a battery pack according to an embodiment of the present invention;

[0029] Figure 2 is a schematic exploded perspective view showing a battery pack according to an embodiment of the present invention;

[0030] Figure 3 is a schematic perspective view showing a battery module according to an embodiment of the present invention;

[0031] Figure 4 is a schematic exploded perspective view showing a battery module according to an embodiment of the present invention;

[0032] Figure 5 is a schematic perspective view showing the structure of a battery pack according to an embodiment of the present invention;

[0033] Figure 6 is along Figure 5 sectional view taken along line A-A;

[0034] Figure 7 is a schematic perspective view showing the structure of a battery pack according to an embodiment of the present invention; and

[0035] Figure 8 is a schematic exploded perspective view showing the structure of a battery pack according to an embodiment of the present invention. Detailed Implementation Modes

[0036] Here, some implementation modes of the present disclosure will be described in more detail with reference to the accompanying drawings. The terms or words used in this specification and the claims should not be construed as limited to the ordinary meaning or dictionary meaning, and should be construed as meanings and concepts consistent with the technical concept of the present disclosure based on the principle that the inventor can be his / her own lexicographer to appropriately define the term concept.

[0037] The implementation modes described in this specification and the configurations shown in the drawings are provided as some exemplary implementation modes of the present disclosure, and do not represent all the technical ideas, aspects and features of the present disclosure. Therefore, it will be understood that various equivalents and modifications that can replace or modify the implementation modes described herein may exist at the time of filing this application.

[0038] It will be understood that when an element or layer is referred to as being "on" another element or layer, "connected to" another element or layer, or "coupled to" another element or layer, it can be directly on the other element or layer, directly connected to the other element or layer, or directly coupled to the other element or layer, or there may also be one or more intervening elements or layers. When an element or layer is referred to as being "directly on" another element or layer, "directly connected to" another element or layer, or "directly coupled to" another element or layer, there are no intervening elements or layers. For example, when the first element is described as being "coupled" or "connected" to the second element, the first element can be directly coupled or connected to the second element, or the first element can be indirectly coupled or connected to the second element via one or more intervening elements.

[0039] In the accompanying drawings, for clarity of illustration, the dimensions of various elements, layers, etc. may be exaggerated. 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 listed items. Further, when describing embodiments of the present disclosure, the use of "may" refers to "one or more embodiments of the present disclosure". Expressions such as "at least one of" and "any one of", when following a list of elements, modify the entire list of elements and not individual elements of the list. 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 consisting 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 can 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 terms "use", "using", and "being used" may be considered synonymous with the terms "utilize", "utilizing", and "being utilized", respectively. As used herein, the terms "substantially", "about", and similar terms are used as approximate terms and not as terms of degree, and are intended to account for the inherent variations in measured or calculated values that would be recognized by a person of ordinary skill in the art.

[0040] It will be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, or part from another element, component, region, layer, or part. Thus, a first element, component, region, layer, or part discussed below may be referred to as a second element, component, region, layer, or part without departing from the teachings of the exemplary embodiments.

[0041] For ease of description, spatial relationship terms such as "under", "below", "beneath", "above", "on", etc. may be used herein to describe the relationship of one element or feature to another element or feature as shown in the figures. It will be understood that, in addition to the orientation depicted in the figures, the spatial relationship terms are also intended to encompass different orientations of the device during use or operation. For example, if the device in the figures is flipped, an element described as "under" or "beneath" another element or feature will be oriented "above" or "on" the other element or feature. Thus, the term "under" can encompass both an upper and a lower orientation. The device may be otherwise oriented (e.g., rotated 90 degrees or in other orientations), and the spatial relationship descriptors used herein should be interpreted accordingly.

[0042] The terms used herein are for the purpose of describing embodiments of the present disclosure and are not intended to be limiting of the present disclosure. As used herein, the singular form "a" is also intended to include the plural form, unless the context clearly dictates otherwise. It will also be understood that when used in this specification, the terms "comprises," "comprising," "includes," and / or "including" specify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0043] In addition, any numerical range disclosed and / or recited herein is intended to include all sub-ranges of the same numerical precision subsumed within the recited range. For example, a range of "1.0 to 10.0" is intended to include all sub-ranges between the recited minimum value of 1.0 and the recited maximum value of 10.0 (and including the recited minimum value of 1.0 and the recited maximum value of 10.0), i.e., sub-ranges having 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 limitation recited herein is intended to include all lower numerical limitations subsumed therein, and any minimum numerical limitation recited in this specification is intended to include all higher numerical limitations subsumed therein. Accordingly, the applicant reserves the right to amend this specification (including the claims) to expressly recite any sub-ranges subsumed within the ranges expressly recited herein.

[0044] Referring to two compared elements, features, etc. as "the same" may mean that they are "substantially the same." Thus, the phrase "substantially the same" may include cases having a deviation considered low in the art (e.g., a deviation of 5% or less). In addition, when a certain parameter is said to be uniform in a given region, it may mean that it is uniform in terms of the average value.

[0045] Throughout the specification, each element may be singular or plural unless otherwise specified.

[0046] When any element is said to be disposed (or positioned or located) "above (or below)" or "on (or under)" a component, it may mean that the any element is placed in contact with the upper (or lower) surface of the component, and it may also mean that another component may be interposed between the component and any element disposed (or positioned or located) "on (or under)" the component.

[0047] In addition, it will be understood that when an element is referred to as being "coupled", "linked", or "connected" to another element, these elements can be "coupled", "linked", or "connected" directly to each other, or there can be one or more intervening elements therebetween through which the elements can be "coupled", "linked", or "connected" to the other element. In addition, when a part is referred to as being "electrically coupled" to another part, the part can be directly electrically connected to the other part, or there can be one or more intervening parts therebetween such that the part and the other part are indirectly electrically connected to each other.

[0048] Throughout the specification, when stating "A and / or B", it means A, B, or A and B, unless otherwise specified. That is, "and / or" includes any or all combinations of the recited items. When stating "C to D", it means C or greater and D or less, unless otherwise specified.

[0049] Figure 1 is a schematic perspective view showing a battery pack according to an embodiment of the present invention, Figure 2 is a schematic exploded perspective view showing a battery pack according to an embodiment of the present invention, Figure 8 is a schematic exploded perspective view showing the structure of a battery pack according to an embodiment of the present invention.

[0050] Referring to Figure 1 、 Figure 2 and Figure 8 According to embodiments of the present invention, the battery pack 2 includes a housing 100, a battery module 1, a cross beam 200, a bracket 300, and a fixing member 400.

[0051] The battery module 1, the cross beam 200, the bracket 300, and the fixing member 400 can be accommodated inside the housing 100. The housing 100 can be used to protect the battery module 1 from external foreign objects, impacts, etc. The housing 100 can include a container 110 and a cover 120.

[0052] The container 110 can be formed in a box shape with an internal accommodation space provided. The container 110 can include an opening 110a. The battery module 1 can be seated inside the container 110 through the opening 110a of the container 110.

[0053] The cover 120 can be coupled to the container 110. In a state where the edge of the cover 120 and the edge of the container 110 are in contact with each other, the cover 120 and the container 110 can be coupled to each other by any one of various methods (such as a bolt connection method, a welding method, a bonding method, an assembly method, and a latch method).

[0054] The cover 120 can cover the opening 110a of the container 110. The cover 120 can cover the opening 110a to prevent foreign objects from being introduced through the opening 110a.

[0055] The cover 120 can be formed in a flat plate shape. The cover 120 can be formed in the same shape as the container 110 to provide an internal accommodation space therein, such that when a part of the battery module 1 seated inside the container 110 is exposed to the outside through the opening 110a, the exposed part of the battery module 1 can be accommodated in the internal accommodation space of the cover 120.

[0056] The cover 120 can be fixed to the bracket 300. The cover 120 can be coupled to the bracket 300 by fastening members such as bolts.

[0057] The housing 100 can further include a sealing member 100a. The sealing member 100a can be interposed between the container 110 and the cover 120. The sealing member 100a can be formed in an annular shape and can include an elastically deformable material. The sealing member 100a can be provided to contact the edges of the container 110 and the cover 120.

[0058] Figure 3 is a schematic perspective view showing a battery module according to an embodiment of the present invention, Figure 4 is a schematic exploded perspective view showing a battery module according to an embodiment of the present invention.

[0059] Refer to Figure 3 and Figure 4 According to, the battery module 1 according to an embodiment of the present invention is accommodated inside the housing 100. The battery module 1 can be provided as a plurality of battery modules 1. The battery modules 1 can be arranged to be spaced apart from each other in a first direction. The battery module 1 includes battery cells 10, side plates 20, cell terminals 30, bus bar seats 40, and bus bars 50.

[0060] The battery cells 10 serve as unit structures for storing and supplying power in the battery module 1. The battery cells 10 can be provided as a plurality of battery cells 10. The plurality of battery cells 10 can be arranged in one direction (e.g., a second direction intersecting the first direction). The front and rear surfaces of adjacent battery cells 10 can be arranged in parallel to face each other.

[0061] The number of battery cells 10 is not limited to Figure 3 and Figure 4 the number of, and various design changes can be made according to the size of the battery module 1 and the like.

[0062] The side plates 20 can be arranged to surround the side surfaces of the battery cells 10 and can be used to protect the battery cells 10 from external foreign objects, impacts, and the like.

[0063] The side plate 20 can be formed in a plate shape facing the side surface of the battery cell 10. The longitudinal direction of the side plate 20 can be the arrangement direction of the plurality of battery cells 10, and can be provided parallel to the side surface of the battery cell 10.

[0064] The side plate 20 can be provided at a preset distance from the side surface of the battery cell 10. Accordingly, a space in which the bus bar seat 40 is installed can be provided between the side surface of the battery cell 10 and the side plate 20.

[0065] The side plate 20 can be provided as a pair of side plates 20. The inner side surfaces of the pair of side plates 20 can be provided to face the two side surfaces of the battery cell 10, respectively.

[0066] The side plate 20 can include a protruding portion 21. The protruding portion 21 can be formed on the outer side surface of the side plate to protrude substantially in shape. The protruding portion 21 can protrude in the width direction of the battery cell 10. The protruding portion 21 can be formed in the central portion of the side plate 20 in the longitudinal direction of the side plate 20.

[0067] Figure 5 is a schematic perspective view showing the structure of a battery pack according to an embodiment of the present invention, Figure 6 is a sectional view taken along line A-A of Figure 5 and, Figure 7 is a schematic perspective view showing the structure of a battery pack according to an embodiment of the present invention.

[0068] Referring to Figures 1 to 8 , the protruding portion 21 can include a first side body 21a, a second side body 21b, and a connecting body 21d.

[0069] The first side body 21a can extend from the side plate 20 toward an adjacent side plate 20. The first side body 21a can be seated on the cross beam 200.

[0070] The second side body 21b can be disposed above the first side body 21a and can be provided to be spaced apart from the first side body 21a. The second side body 21b can extend from the side plate 20 toward an adjacent side plate 20. The bracket 300 can be seated on the second side body 21b.

[0071] The connecting body 21d can be formed in the height direction of the battery cell 10 and can connect the end of the first side body 21a and the end of the second side body 21b.

[0072] The side plate 20 can include a first opening 21c. The first opening 21c can be formed to pass through the connecting body 21d.

[0073] The first openings 21c may be provided as a plurality of first openings 21c, and the plurality of first openings 21c are arranged to be spaced apart from each other in the longitudinal direction of the side plate 20. The plurality of first openings 21c may be arranged to face the second openings 41 of the bus bar seat 40 respectively.

[0074] The single cell terminals 30 may protrude from the side surface of the battery cell 10 toward the side plate 20. The single cell terminals 30 may be provided as a pair of single cell terminals 30. The pair of single cell terminals 30 may be symmetrically arranged on both sides of the battery cell 10. The pair of single cell terminals 30 may have different polarities.

[0075] The pair of single cell terminals 30 may protrude from the two side surfaces of the battery cell 10 in different directions, and their ends may be arranged to face the pair of side plates 20. The single cell terminals 30 may be arranged to face the first openings 21c.

[0076] The bus bar seat 40 may be arranged between the side plate 20 and the battery cell 10. The bus bar seat 40 may be coupled to the side plate 20. The bus bar seat 40 may be formed in a substantially flat plate shape. The two surfaces of the bus bar seat 40 may be arranged parallel to the side surface of the battery cell 10 and the side plate 20 and face the side surface of the battery cell 10 and the side plate 20.

[0077] The bus bar seat 40 may be provided as a pair of bus bar seats 40. The pair of bus bar seats 40 may be symmetrically arranged on both sides of the battery cell 10. Any one of the pair of bus bar seats 40 may be arranged between the side plate 20 and the single cell terminal 30 provided on one side of the battery cell 10, and the other bus bar seat 40 may be arranged between the side plate 20 and the single cell terminal 30 provided on the other side of the battery cell 10.

[0078] The bus bar seat 40 may include second openings 41. The second openings 41 may be formed to pass through the bus bar seat 40. The second openings 41 may be provided as a plurality of second openings 41, and the plurality of second openings 41 are arranged to be spaced apart from each other in the longitudinal direction of the bus bar seat 40 so that the second openings 41 communicate with the first openings 21c.

[0079] The plurality of second openings 41 may be arranged to face the plurality of first openings 21c respectively and face the plurality of single cell terminals 30 respectively.

[0080] The bus bar 50 may be supported by the bus bar seat 40. The bus bar 50 may be provided on the inner side surface of the bus bar seat 40 facing the battery cell 10 and may cover the second openings 41. The bus bar 50 may be formed of a conductive material such as copper, aluminum or nickel.

[0081] The bus bar 50 may be provided as a plurality of bus bars 50. The plurality of bus bars 50 may be respectively connected to a plurality of single terminals 30 to connect a plurality of battery cells 10 in series or in parallel.

[0082] The battery module 1 according to an embodiment of the present invention may further include a flexible substrate 60. The flexible substrate 60 may be included in the bus bar seat 40 and electrically connected to the bus bar 50. The flexible substrate 60 may be referred to as a flexible printed circuit assembly (FPCA) or a flexible printed circuit board (FPCB).

[0083] The flexible substrate 60 may be coupled to the outer side surface of the bus bar seat 40. The flexible substrate 60 may be coupled to the bus bar seat 40 by any one of various coupling methods such as a bolt connection method, a welding method, an adhesion method, an assembly method, and a latch method.

[0084] The battery module 1 according to an embodiment of the present invention may further include an end plate 70.

[0085] The end plate 70 may be provided to intersect with the side plate 20 and face each of the front surface and the rear surface of the battery cell 10. More specifically, the end plate 70 may be provided as a pair of end plates 70, and the inner side surfaces of the pair of end plates 70 may be provided to face the front surface of the battery cell 10 disposed at one end among the plurality of battery cells 10 and the rear surface of the battery cell 10 disposed at the other end among the plurality of battery cells 10.

[0086] The end plate 70 may be formed in a substantially plate shape. The longitudinal direction of the end plate 70 may be a direction perpendicular to the arrangement direction of the plurality of battery cells 10 and may be parallel to the front surface and the rear surface of the battery cell 10.

[0087] Both ends of the end plate 70 may be coupled to the side plate 20. More specifically, both ends of any one of the pair of end plates 70 may be coupled to one end of each of the pair of side plates 20, and both ends of the other end plate 70 may be coupled to the other end of each of the pair of side plates 20.

[0088] The side plate 20 and the end plate 70 may be coupled to each other by any one of various coupling methods such as a bolt connection method, a welding method, an adhesion method, an assembly method, and a latch method.

[0089] The battery pack 2 according to an embodiment of the present invention may further include a first cooling plate 130 and a second cooling plate 140.

[0090] The first cooling plate 130 may be formed in a substantially plate shape. The first cooling plate 130 may be disposed between the cover 120 and the battery module 1.

[0091] The first cooling plate 130 can be seated on the battery module 1 and be in contact with the upper surface of the battery module 1. The first cooling plate 130 can cool the heat generated by the battery cells 10.

[0092] The first cooling plate 130 can be fixed to the bracket 300. The first cooling plate 130 can be coupled to the bracket 300 by fastening members such as bolts.

[0093] The second cooling plate 140 can be formed in a substantially plate shape. The second cooling plate 140 can be disposed between the container 110 and the battery module 1.

[0094] The battery module 1 can be seated on the second cooling plate 140, and the second cooling plate 140 can be in contact with the lower surface of the battery module 1. The second cooling plate 140 can cool the heat generated by the battery cells 10.

[0095] The second cooling plate 140 can include an exhaust port portion that does not interfere with the cross beam 200.

[0096] The cross beam 200 is disposed between adjacent battery modules 1. The cross beam 200 can be disposed between a plurality of battery modules 1 that are accommodated inside the housing 100 and are arranged at intervals in the first direction.

[0097] The cross beam 200 can be formed to extend in the second direction. The cross beam 200 can be in contact with the lower side of the side plate 20. The cross beam 200 can support the side plate 20. The cross beam 200 can include a base frame 210 and a protruding frame 220.

[0098] The base frame 210 can be seated in the housing 100. The base frame 210 can be seated on the inner bottom surface of the container 110.

[0099] The protruding frame 220 can protrude from the base frame 210 toward the bracket 300. The protruding frame 220 can be formed to protrude from the central portion of the base frame 210 in the height direction of the battery cells 10. The first side body 21a can be seated on the protruding frame 220.

[0100] The protruding frame 220 can be formed such that the width of the protruding frame 220 decreases toward the bracket 300. The first side body 21a adjacent to the first portion 220a and the second portion 220b of the protruding frame 220 can be seated on the first portion 220a and the second portion 220b.

[0101] The protruding frame 220 can include a first hole 221. The first hole 221 can be formed to penetrate the protruding frame 220. The first hole 221 can be formed between the first portion 220a and the second portion 220b of the protruding frame 220. The fixing member 400 can pass through the first hole 221.

[0102] The bracket 300 is disposed between adjacent battery modules 1. The bracket 300 can be disposed between a plurality of battery modules 1 that are accommodated inside the housing 100 and are arranged to be spaced apart from each other in the first direction.

[0103] The bracket 300 can be formed to extend in the second direction. The bracket 300 can contact the upper side of the side plate 20. The bracket 300 can press the side plate 20. The bracket 300 can include a seating plate 310, a first extension plate 320, and a second extension plate 330.

[0104] The lower surface of the seating plate 310 can be seated on the second side bodies 21b adjacent to the lower surface on both sides of the seating plate 310. The seating plate 310 can include a second hole 311. The second hole 311 can be formed to pass through the seating plate 310. The fixing member 400 can pass through the second hole 311.

[0105] The first extension plates 320 can be provided as a pair of first extension plates 320. The first extension plates 320 can be formed to extend from both sides of the seating plate 310 in the height direction of the battery cell 10.

[0106] The second extension plate 330 can extend from the pair of first extension plates 320 and cover the seating plate 310. The second extension plate 330 can include a through hole 331.

[0107] The through hole 331 can be formed to pass through the second extension plate 330. The fixing member 400 can pass through each through hole 331. The through holes 331 can be arranged to be spaced apart from each other in the longitudinal direction of the second extension plate 330. The first cooling plate 130 and the cover 120 can be bolted to the second extension plate 330.

[0108] The fixing member 400 fixes the bracket 300 and the cross beam 200 to the side plate 20. The fixing member 400 can include a bolt member 410 and a nut member 420.

[0109] The bolt member 410 can pass through the bracket 300 and the cross beam 200 and can be mounted on the bracket 300. The bolt member 410 can include a head 411 and a body portion 412. The head 411 can be seated inside the bracket 300.

[0110] The diameter of the head 411 can be smaller than the diameter of the through hole 331 and larger than the diameter of the second hole 311. Thus, the head 411 can pass through the through hole 331 and can be mounted on the seating plate 310.

[0111] The body portion 412 can sequentially pass through the bracket 300 and the cross beam 200 and can be coupled to the nut member 420. The diameter of the body portion 412 can be smaller than the diameter of the head 411 and smaller than the diameter of each of the first hole 221 and the second hole 311.

[0112] Threads can be formed on the outer peripheral surface of the body portion 412. Thus, the body portion 412 can pass through the bracket 300 and the cross beam 200, and can be helically coupled to the nut member 420.

[0113] The nut member 420 can be fixed to the cross beam 200. The nut member 420 can be inserted into the first hole 221 of the cross beam 200. The nut member 420 can be press-fitted into the first hole 221. Threads can be formed along the inner peripheral surface of the nut member 420. Thus, the nut member 420 can be helically coupled to the bolt member 410.

[0114] According to an embodiment of the present invention, since the bracket and the cross beam are disposed on the upper side and the lower side of the protruding portions of the adjacent side plates that protect the side surface where the monomer terminals of the battery monomer are disposed herein, and the fixing member fixes the bracket and the cross beam to the side plates, the volumetric energy density and the weight energy density of the battery pack can be optimized.

[0115] However, the effects achievable by the present invention are not limited to the above effects, and those skilled in the art will clearly understand other effects not described above from the above description of the present invention.

[0116] Although the present invention has been described with reference to the drawings and embodiments showing aspects of the present invention, the present invention is not limited thereto. Those skilled in the art to which the present invention pertains can make various modifications and variations within the scope of the technical spirit of the present invention.

Claims

1. A battery module, comprising: Battery cells; a side plate facing a side surface of the battery cell and including a protruding portion protruding in a width direction of the battery cell; a cell terminal protruding from the battery cell toward the side plate; a bus bar holder coupled to the side plate and disposed between the side plate and the battery cell; as well as A bus bar is supported by the bus bar holder and connected to the cell terminal.

2. The battery module according to claim 1, wherein: The side plates, the cell terminals and the busbar seats are respectively provided as a pair of side plates, a pair of cell terminals and a pair of busbar seats, wherein the pair of side plates, the pair of cell terminals and the pair of busbar seats are each symmetrically arranged on both sides of the battery cell.

3. The battery module according to claim 1, wherein: The protruding portion includes a first opening; and The bus bar holder includes a second opening in communication with the first opening.

4. The battery module according to claim 3, wherein: The bus bar covers the second opening. 5 . The battery module according to claim 1 , further comprising a flexible substrate included in the bus bar holder and electrically connected to the bus bar. 6 . The battery module according to claim 1 , further comprising an end plate facing each of front and rear surfaces of the battery cells.

7. A battery pack comprising: case; battery modules, which are accommodated inside the housing and are arranged to be spaced apart from each other in a first direction, and each of the battery modules includes the battery module according to any one of claims 1 to 6; A crossbeam, disposed between adjacent battery modules, extending in the second direction and contacting the lower side of the side plate; a bracket, disposed between adjacent battery modules, extending in the second direction and contacting an upper side of the side plate; as well as A fixing member fixes the bracket and the cross beam to the side plate.

8. The battery pack according to claim 7, wherein: The protruding portion comprises: a first side body extending from the side panel toward an adjacent side panel and seated on the cross beam; a second side body extending from the side plate toward the adjacent side plate, and the bracket is seated on the second side body; and The connecting body connects the end of the first side body and the end of the second side body and includes a first opening.

9. The battery pack according to claim 8, wherein: The crossbeam comprises: a base frame seated in the housing; and A protruding frame protrudes from the base frame toward the bracket, and the first side body is seated on the protruding frame.

10. The battery pack according to claim 9, wherein: The width of the protruding frame decreases toward the bracket.

11. The battery pack according to claim 9, wherein: The first side body adjacent to the first and second parts of the protruding frame is seated on the first and second parts.

12. The battery pack according to claim 11, wherein: The protruding frame includes a first hole formed between the first portion and the second portion, and the fixing member passes through the first hole.

13. The battery pack according to claim 8, wherein: The support comprises: a seating plate, the lower surface of which is seated on the second side bodies adjacent to the lower surface on both sides of the seating plate, and the seating plate comprises a second hole through which the fixing member passes; a pair of first extension plates extending from both sides of the seating plate in a height direction of the battery cell; and A second extension plate, extending from the pair of first extension plates, covers the seating plate and includes a through hole through which the fixing member passes.

14. The battery pack according to claim 13, wherein: The through holes are arranged to be spaced apart from each other in the longitudinal direction of the second extension plate.

15. The battery pack according to claim 7, wherein: The fixing member comprises: a bolt member passing through the bracket and the cross beam and mounted on the bracket; and A nut member is fixed to the beam, and the bolt member is coupled to the nut member.

16. The battery pack according to claim 15, wherein: The bolt member comprises: a head seated inside the support; and The body portion passes through the bracket and the beam in sequence and is screwed to the nut member.

17. The battery pack according to claim 7, wherein: The housing comprises: a container in which the battery module is seated and which includes an opening; and A cover is coupled to the container and covers the opening.

18. The battery pack according to claim 17, wherein: The cover bolt is coupled to the bracket.

19. The battery pack according to claim 17, further comprising: a first cooling plate, disposed between the cover and the battery module; as well as The second cooling plate is arranged between the container and the battery module.

20. The battery pack according to claim 19, wherein: The first cooling plate is bolted to the bracket.

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