Battery module

Abstract

Provided is a battery module including: a battery cell assembly (100) including a reference plate (110) having a predetermined thickness in a third direction, and a first laminated portion (120) and a second laminated portion (130), first and second laminated portions (110, 110) bonded to first and second side surfaces of the reference plate (110) in the third direction, respectively, and including a plurality of battery cells (C) laminated and bonded to each other in the third direction, respectively; and a frame (200) having an internal space (S) into which the battery cell assembly (100) is inserted and accommodated. The internal space (S) includes: a predetermined portion (P1) that accommodates the reference plate (110); and one side portion (P2) and the other side portion (P3) joined to one side and the other side of the predetermined portion (P1) in the third direction with respect to the predetermined portion (P1), respectively, and housing the first laminated portion (120) and the second laminated portion (130), respectively.

Description

Technical Field

[0001] This application claims the priority and benefits of Korean Patent Application No. 10-2022-0012628, filed on January 27, 2022, the disclosure of which is incorporated herein by reference in its entirety. The present disclosure relates to a battery module, and more particularly, to a battery module having a simple configuration, ensuring improved safety and reliability, and being easily and quickly manufactured without incurring a large cost. Background Art

[0002] Figures 1 to 3 are a perspective view, an exploded perspective view, and a front view showing a prior art battery module. Referring to Figures 1 to 3 , the prior art battery module may include a battery cell stack 1 and a frame 2.

[0003] The battery cell stack 1 may include a plurality of battery cells C stacked and coupled to each other. The battery cell stack 1 may be inserted into the frame 2. The frame 2 may be provided with an inner space S for accommodating the battery cell stack 1. The plurality of battery cells C may be adhered to the inner surface of the frame facing the inner space S by an adhesive resin R coated on the inner surface of the frame facing the inner space S.

[0004] Based on the technology in the related art as described above, a battery module can be easily manufactured without incurring a large cost. However, due to manufacturing tolerances (errors), each stacked battery cell C may stick and be eccentrically fixed to any one side (e.g., the left side) of the inner space S. Therefore, a cumulative (maximum) tolerance (error), i.e., D, may occur in the position of the outermost battery cell C among the stacked battery cells C in the battery cell stack 1. When the stacked battery cells C expand, as D increases, the pressure applied between the battery cells C increases, resulting in the bursting or explosion of the battery cells C.

[0005] Against this background, there is an increasing need for a method of easily manufacturing a battery module that ensures improved safety and reliability and does not incur a large manufacturing cost.

[0006] The prior art related thereto is disclosed in Korean Patent Application No. 10-2021-0007244.

[0007] According to this document, it includes a battery cell assembly, which includes: a plurality of battery cells stacked on each other; a pair of side plates provided on both sides of the battery cell assembly; and a pair of compression pads provided on both sides of the pair of side plates, the pair of compression pads being exposed on the two outermost sides of the battery module and absorbing the expansion and assembly tolerances of the battery cell assembly.

[0008] However, the prior art battery module is configured in a complex manner and is not easily manufactured. Summary of the Invention

[0009] Technical Problem

[0010] An object of the present disclosure is to provide a battery module having a simple configuration and being easily and quickly manufactured without incurring a large cost.

[0011] An object of the present disclosure is to provide a battery module that ensures improved safety and reliability.

[0012] The various aspects according to the present disclosure are not limited to the above aspects, and other aspects and advantages not mentioned above can be clearly understood from the following description and can be more clearly understood from the embodiments described herein. In addition, the various aspects and advantages in the present disclosure can be achieved by the devices and combinations thereof described in the appended claims.

[0013] Technical Solution

[0014] According to the present disclosure, there is provided a battery module including a battery cell assembly 100 and a frame 200.

[0015] The battery cell assembly 100 includes a reference plate 110, a first stacked portion 120, and a second stacked portion 130.

[0016] The reference plate 110 extends in a first direction and a second direction intersecting the first direction, and has a predetermined thickness in a third direction intersecting the first direction and the second direction.

[0017] The first stacked portion 120 is coupled to a first side surface of the reference plate 110 in the third direction, and includes a plurality of battery cells C stacked and coupled to each other in the third direction.

[0018] The second stacked portion 130 is coupled to a second side surface of the reference plate 110 in the third direction, the second side surface being opposite to the first side surface, and includes a plurality of battery cells C stacked and coupled to each other in the third direction.

[0019] In a state where the first stacked portion 120 and the second stacked portion 130 are coupled to the reference plate 110, the frame 200 has an internal space S into which the battery cell assembly 100 is inserted and accommodated, and the battery cell assembly 100 is inserted and accommodated in the internal space S.

[0020] The internal space S may include a predetermined portion P1, one side portion P2, and the other side portion P3.

[0021] The reference plate 110 is accommodated in the predetermined portion P1.

[0022] One side portion P2 corresponds to a space on one side of the predetermined portion P1 in the third direction.

[0023] The first stacked portion 120 is received in one side portion P2.

[0024] Another side portion P3 corresponds to a space on the other side in the third direction of the predetermined portion P1.

[0025] The second stacked portion 130 is received in the other side portion P2.

[0026] The position of the predetermined portion P1 is determined based on the lengths of the first stacked portion 120 and the second stacked portion 130 in the third direction.

[0027] The end portions on both sides of the reference plate 110 in the first direction are joined to the inner surfaces of both sides of the frame facing the predetermined portion P1 in the first direction.

[0028] One end portion of at least one battery cell C of the first stacked portion 120 in the first direction is bonded to the inner surface of the frame facing one side portion P2 in the first direction.

[0029] One end portion of at least one battery cell C of the second stacked portion 130 in the first direction is bonded to the inner surface of the frame facing the other side portion P3 in the first direction.

[0030] In one embodiment, the reference plate 110 may have bending stiffness in the third direction.

[0031] In one embodiment, guide portions G may be formed on the inner surfaces of both sides of the frame facing the predetermined portion P1 in the first direction, and the guide portions G extend in the second direction.

[0032] The end portions on both sides of the reference plate 110 in the first direction may be inserted into the internal space S along the guide portions G in the second direction.

[0033] In one embodiment, the predetermined portion P1 may be provided at a position where the ratio of the width in the third direction of one side portion P2 to the width in the third direction of the other side portion P3 corresponds to the ratio of the length in the third direction of the first stacked portion 120 to the length in the third direction of the second stacked portion 130.

[0034] In one embodiment, the first stacked portion 120 or the second stacked portion 130 may further include one or more elastic members E, and the one or more elastic members E are disposed between the battery cells C of the first stacked portion 120 or the second stacked portion 130 and contract as the battery cells C expand.

[0035] One or more elastic members E may be respectively disposed between adjacent battery cells C in different pairs of battery cells C.

[0036] In one embodiment, the first stacked portion 120 or the second stacked portion 130 may include a plurality of elastic members E.

[0037] The plurality of elastic members E may include a first elastic member E1 and a second elastic member E2, and the second elastic member E2 is arranged to be farther from the reference plate 110 than the first elastic member E1 in the third direction.

[0038] The thickness of the second elastic member E2 in the third direction may be greater than the thickness of the first elastic member E1 in the third direction.

[0039] In one embodiment, the first stacked portion 120 or the second stacked portion 130 may include a plurality of elastic members E.

[0040] In the third direction, the thickness of each elastic member E may be greater than the thickness of another elastic member E arranged to be closer to the reference plate 110 than each of the elastic members E in the third direction.

[0041] In one embodiment, the number of battery cells C stacked between adjacent elastic members E may be the same as the number of battery cells C stacked between the reference plate 110 and the elastic member E adjacent to the reference plate 110.

[0042] In one embodiment, the first stacked portion 120 or the second stacked portion 130 may include a plurality of elastic members E.

[0043] The plurality of elastic members E may include a first elastic member E1 and a second elastic member E2, and the second elastic member E2 is arranged to be farther from the reference plate 110 than the first elastic member E1 in the third direction.

[0044] The number of battery cells C stacked between the second elastic member E2 and the elastic member E adjacent to the second elastic member E2 and arranged to be closer to the reference plate 110 may be less than the number of battery cells C stacked between the first elastic member E1 and the reference plate 110 or stacked between the first elastic member E1 and the elastic member E adjacent to the first elastic member E1 and arranged to be closer to the reference plate 110.

[0045] In one embodiment, the first stacked portion 120 or the second stacked portion 130 may include a plurality of elastic members E.

[0046] The number of battery cells C stacked between an elastic member E and an elastic member E adjacent to the elastic member E and arranged closer to the reference plate 110 can be less than the number of battery cells C stacked between another elastic member E arranged closer to the reference plate 110 than an elastic member E in the third direction and the reference plate 110 adjacent to the other elastic member E or stacked between another elastic member E and an elastic member E adjacent to the other elastic member E and arranged closer to the reference plate 110.

[0047] In one embodiment, the plurality of elastic members E may have the same thickness in the third direction.

[0048] In one embodiment, in the third direction, the thickness of an elastic member E is greater than the thickness of another elastic member E arranged closer to the reference plate 110 than the one elastic member E in the third direction.

[0049] Furthermore, according to the present disclosure, there is provided a method for manufacturing the above battery module, including: an insertion step and an adhesion step.

[0050] The insertion step includes: inserting the battery cell assembly 100 into the internal space S of the frame 200 in the second direction in a state where the first stacking portion 120 and the second stacking portion 130 are combined with the reference plate 110.

[0051] At this time, the reference plate 110 is inserted into a predetermined portion P1, the first stacking portion 120 is inserted into one side portion P2, and the second stacking portion 130 is inserted into the other side portion P3.

[0052] The adhesion step includes: adhering an end portion on one side in the first direction of at least one battery cell C of the first stacking portion 120 to the inner surface on one side in the first direction of the frame facing one side portion P2.

[0053] Furthermore, the adhesion step includes adhering an end portion on one side in the first direction of at least one battery cell C of the second stacking portion 130 to the inner surface on one side in the first direction of the frame facing the other side portion P3.

[0054] Beneficial effects

[0055] In an embodiment, the battery module may include: a battery cell assembly 100 including a reference plate 110, a first stacked portion 120, and a second stacked portion 130, the reference plate 110 extending in a first direction and a second direction intersecting the first direction and having a predetermined thickness in a third direction intersecting the first direction and the second direction, the first stacked portion 120 being coupled to a first side surface of the reference plate 110 in the third direction and including a plurality of battery cells C stacked and coupled to each other in the third direction, the second stacked portion 130 being coupled to a second side surface of the reference plate 110 opposite to the first side surface in the third direction and including a plurality of battery cells C stacked and coupled to each other in the third direction; and a frame 200, in a state where the first stacked portion 120 and the second stacked portion 130 are coupled to the reference plate 110, the frame 200 having an internal space S into which the battery cell assembly 100 is inserted and accommodated, and the battery cell assembly 100 being inserted and accommodated in the internal space S, wherein the internal space S includes a predetermined portion P1, one side portion P2, and the other side portion P3, the predetermined portion P1 accommodating the reference plate 110, one side portion P2 corresponding to a space on one side of the predetermined portion P1 in the third direction and accommodating the first stacked portion 120, the other side portion P3 corresponding to a space on the other side of the predetermined portion P1 in the third direction and accommodating the second stacked portion 130, wherein the position of the predetermined portion P1 is determined based on the lengths of the first stacked portion 120 and the second stacked portion 130 in the third direction, wherein both end portions of the reference plate 110 on both sides in the first direction are coupled to the inner surfaces of both sides of the frame facing the predetermined portion P1 in the first direction, wherein at least one end portion of at least one battery cell C of the first stacked portion 120 on one side in the first direction adheres to the inner surface of one side of the frame facing the one side portion P2 in the first direction, and wherein at least one end portion of at least one battery cell C of the second stacked portion 130 on one side in the first direction adheres to the inner surface of one side of the frame facing the other side portion P3 in the first direction.

[0056] Accordingly, the stacked battery cells C of the battery cell assembly 100 are divided into the battery cells C of the first stacked portion 120 and the battery cells C of the second stacked portion 130 by the reference plate 110 and are respectively accommodated in one side portion P2 and the other side portion P3 of the internal space S of the frame 200, resulting in a reduction in the number of a set of stacked battery cells C.

[0057] For example, when the total number of the battery cells C is 12, the number of a set of stacked battery cells C in the prior art is 12 ( Figures 1 to 3 ). However, in the present disclosure, the number of a set of stacked battery cells C may be 6 ( Figures 4 to 6 ).

[0058] Therefore, due to the simple method of manufacturing the battery module 10 by inserting the battery cell assembly 100 into the inner space S of the frame 200 and adhering one end of the battery cells C on one side in the first direction to the inner surface of the frame on one side in the first direction facing the inner space S, even if the stacked battery cells C are fixed to a position eccentric to one side in the third direction due to manufacturing tolerances (errors), the cumulative (maximum) tolerance (error) of the position of the battery cell C that is attached and fixed to the inner surface of the frame facing the inner space S of the frame 200 and is set to be the farthest from the reference plate 110 in the third direction among a set of stacked battery cells C can be reduced. Therefore, in the case where a set of stacked battery cells C expands, the pressure applied between the battery cells C can be reduced, preventing the bursting or explosion of the battery cells C. That is, the battery module 10 with a simple configuration can be easily and quickly manufactured, ensuring improved safety and reliability without incurring a large cost.

[0059] For example, in the prior art, the cumulative (maximum) tolerance (error) of the position of the outermost battery cell C that is attached and fixed to the inner surface of the inner space S of the frame 200 in a set of stacked battery cells C can be D( Figures 1 to 3 ), and in the present disclosure, the cumulative (maximum) tolerance (error) of the position of the outermost battery cell C that is attached and fixed to the inner surface of the inner space S of the frame 200 in a set of stacked battery cells C can be reduced to D1 or D2( Figures 4 to 6 ).

[0060] In addition, since the reference plate 110 is accommodated in a predetermined portion P1 of the inner space S of the frame 200, the battery cell assembly 100 can be easily fixed and set at an appropriate position in the frame 200. In particular, since the battery cell assembly 100 is not fixed and set eccentrically toward any one side in the third direction of the inner space S of the frame 200, the spaces P2, P3 accommodating the first stacked portion 120 and the second stacked portion 130 can have appropriate dimensions. Therefore, even if the battery cells C in the first stacked portion 120 or the battery cells C in the second stacked portion 130 expand, the bursting or explosion of the battery cells C can be prevented. Therefore, the battery module 10 with a simple configuration can be easily and quickly manufactured, ensuring improved safety and reliability without incurring a large cost.

[0061] In an embodiment, the reference plate 110 may have bending resistance in the third direction.

[0062] Therefore, even if the first stacked portion 120 and the second stacked portion 130 press the reference plate 110 in the third direction due to the expansion of the battery cell C, the reference plate 110 does not press or firmly press the second stacked portion 130 or the first stacked portion 120 provided on the opposite side of the reference plate 110 in the third direction. Therefore, since the battery module 10 is manufactured by a simple method of inserting the battery cell assembly 100 into the internal space S of the frame 200 and adhering one end of the battery cell C on one side in the first direction to the inner surface of the frame facing the internal space S in the first direction, even if the stacked battery cells C of the first stacked portion 120 or the second stacked portion 130 are fixed to positions eccentric toward the reference plate 110 due to manufacturing tolerances (errors), it is possible to prevent the pressure applied between the stacked battery cells C of the first stacked portion 120 or the second stacked portion 130 from further increasing when the stacked battery cells C on the second stacked portion 130 or the first stacked portion 120 on the opposite side of the reference plate 110 expand. Therefore, it is possible to prevent the bursting or explosion of the battery cell C. Therefore, it is possible to easily and quickly manufacture a battery module 10 having a simple configuration and ensuring improved safety and reliability without incurring a large cost.

[0063] In an embodiment, guide portions G may be formed on inner surfaces of both sides of the frame in the first direction facing a predetermined portion P1 and extend in the second direction. End portions of both sides of the reference plate 110 in the first direction may be inserted into the internal space S along the guide portions G in the second direction.

[0064] Therefore, the battery cell assembly 100 can be easily fixed and installed at an appropriate position of the frame 200. Therefore, it is possible to easily and quickly manufacture a battery module 10 having a simple configuration and ensuring improved safety and reliability without incurring a large cost.

[0065] In an embodiment, the predetermined portion P1 may be provided at a position where the ratio of the width in the third direction of one side portion P2 to the width in the third direction of the other side portion P3 corresponds to the ratio of the length in the third direction of the first stacked portion 120 to the length in the third direction of the second stacked portion 130.

[0066] Therefore, for example, the space for accommodating the first stacked portion 120 and the second stacked portion 130 can have an appropriate size proportional to the number of battery cells C of the first stacked portion 120 and the second stacked portion 130. Therefore, even if the battery cells C of the first stacked portion 120 or the second stacked portion 130 expand, it is possible to prevent the bursting or explosion of the battery cells C, ensuring improved stability and reliability of the battery module 10.

[0067] In an embodiment, the first stacked portion 120 or the second stacked portion 130 may further include one or more elastic members E disposed between the battery cells C of the first stacked portion 120 or the second stacked portion 130 and configured to contract as the battery cells C expand. The one or more elastic members E may be respectively disposed between adjacent battery cells C in different pairs of battery cells C.

[0068] Accordingly, the elastic members E may absorb or offset the expansion and manufacturing tolerances of the stacked battery cells C of the first stacked portion 120 or the second stacked portion 130, ensuring an improvement in the safety and reliability of the battery module 10.

[0069] In an embodiment, the first stacked portion 120 or the second stacked portion 130 may include a plurality of elastic members E. The plurality of elastic members E may include a first elastic member E1 and a second elastic member E2 disposed to be farther from the reference plate 110 than the first elastic member E1 in a third direction. The thickness of the second elastic member E2 in the third direction may be greater than the thickness of the first elastic member E1 in the third direction.

[0070] Accordingly, the second elastic member E2 disposed to be farther from the reference plate 110 than the first elastic member E1 in the third direction may further absorb or offset the expansion and assembly tolerances of the battery cells C more than the first elastic member E1. Thus, since a set of battery cells C are stacked in the first stacked portion 120 or the second stacked portion 130 and fixed to the frame 200, even if the cumulative expansion and tolerances of the battery cells C disposed to be farther from the reference plate 110 in the third direction increase, resulting in an increase in pressure, the second elastic member E2 may effectively absorb or offset the cumulative expansion and tolerances of the battery cells C. Accordingly, the safety and reliability of the battery module 10 may be further improved.

[0071] In an embodiment, the first stacked portion 120 or the second stacked portion 130 may include a plurality of elastic members E. In the third direction, the thickness of each elastic member E may be greater than the thickness of another elastic member E disposed to be closer to the reference plate 110 than the elastic member E in the third direction.

[0072] Accordingly, as the elastic members E become farther from the reference plate 110 in the third direction, the elastic members further absorb or offset the expansion and assembly tolerances of the battery cells C. Thus, since a set of battery cells C are stacked in the first stacked portion 120 or the second stacked portion 130 and fixed to the frame 200, as the battery cells C become farther from the reference plate 110 in the third direction, even if the cumulative expansion and tolerances of the battery cells C increase, resulting in an increase in pressure, the elastic members E may effectively absorb or offset the cumulative expansion and tolerances of the battery cells C. Accordingly, the safety and reliability of the battery module 10 may be further improved.

[0073] In an embodiment, the number of battery cells C stacked between adjacent elastic members E may be the same as the number of battery cells C stacked between the reference plate 110 and the elastic member E adjacent to the reference plate 110.

[0074] Therefore, the number of battery cells C provided on one side or the other side in the third direction of each elastic member E does not need to be changed according to the elastic member E, enabling the easy manufacture of the battery cell assembly 100 at a low cost.

[0075] In an embodiment, the first stacking portion 120 or the second stacking portion 130 may include a plurality of elastic members E. The plurality of elastic members E may include a first elastic member E1 and a second elastic member E2 disposed farther from the reference plate 110 than the first elastic member E1 in the third direction. The number of battery cells C stacked between the second elastic member E2 and the elastic member E adjacent to the second elastic member E2 and disposed on the reference plate 110 side may be less than the number of battery cells C stacked between the first elastic member E1 and the reference plate 110 adjacent to the first elastic member E1 or stacked between the first elastic member E1 and the elastic member E adjacent to the first elastic member E1 and disposed on the reference plate 110 side.

[0076] Therefore, the expansion and assembly tolerances of the battery cells C disposed farther from the reference plate 110 in the third direction can be further absorbed or offset. Thus, since a set of battery cells C is stacked in the first stacking portion 120 or the second stacking portion 130 and fixed to the frame 200, even if the cumulative expansion and tolerances of the battery cells C disposed farther from the reference plate 110 in the third direction increase, resulting in an increase in pressure, the second elastic member E2 can effectively absorb or offset the cumulative expansion and tolerances of the battery cells C. Therefore, the safety and reliability of the battery module 10 can be further improved.

[0077] In an embodiment, the first stacking portion 120 or the second stacking portion 130 may include a plurality of elastic members E. At this time, the number of battery cells C stacked between each elastic member E and the elastic member E adjacent to each elastic member E and disposed on the reference plate 110 side may be less than the number of battery cells C stacked between another elastic member E disposed closer to the reference plate 110 than each elastic member E in the third direction and the reference plate 110 adjacent to the other elastic member E or stacked between the other elastic member E and the elastic member E adjacent to the other elastic member E and disposed on the reference plate 110 side.

[0078] Therefore, the expansion and assembly tolerances of the battery cell C, which is set to be further away from the reference board 110 in the third direction, can be further absorbed or offset. Thus, since a group of battery cells C are stacked in the first stacking portion 120 or the second stacking portion 130 and fixed to the frame 200, as the battery cell C becomes further away from the reference board 110 in the third direction, even if the cumulative expansion and tolerances of the battery cell C increase, resulting in an increase in pressure, the elastic member E can effectively absorb or offset the cumulative expansion and tolerances of the battery cell C. Therefore, the safety and reliability of the battery module 10 can be further improved.

[0079] In an embodiment, the thicknesses of the plurality of elastic members E in the third direction can all be the same.

[0080] Therefore, it is not necessary to change the thickness of the elastic member E in the third direction according to the position of the elastic member E, so that the battery cell assembly 100 can be easily manufactured at a lower cost.

[0081] In an embodiment, in the third direction, the thickness of each elastic member E can be greater than the thickness of another elastic member E that is set to be closer to the reference board 110 than the elastic member E in the third direction.

[0082] Therefore, as the elastic member E becomes further away from the reference board 110 in the third direction, the expansion and assembly tolerances of the battery cell C can be more effectively absorbed or offset. Thus, since a group of battery cells C are stacked in the first stacking portion 120 or the second stacking portion 130 and fixed to the frame 200, such that as the battery cell C becomes further away from the reference board 110 in the third direction, resulting in an increase in pressure, even if the cumulative expansion and tolerances of the battery cell C increase, the elastic member E can more effectively absorb or offset the cumulative expansion and tolerances of the battery cell C. Therefore, the safety and reliability of the battery module 10 can be further improved.

[0083] The specific effects are described in the detailed description section together with the above effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] Figures 1 to 3 are a perspective view, an exploded perspective view, and a front view showing a battery module of the prior art.

[0085] Figures 4 to 6 are a perspective view, an exploded perspective view, and a front view showing a battery module of an embodiment.

[0086] Figures 7 to 9 is a front view showing a battery module of another embodiment.

[0087] 10: Battery module

[0088] 100: Battery cell assembly C: Battery cell

[0089] 110: Reference plate 120: First stacked portion

[0090] 130: Second stacked portion E: Elastic member

[0091] E1: First elastic member E2: Second elastic member

[0092] 200: Frame S: Internal space

[0093] P1: Predetermined portion P1: One side portion

[0094] P3: Another side portion G: Guide portion

[0095] R: Adhesive resin Detailed implementation mode

[0096] In the following, the above aspects, features and advantages will be specifically described with reference to the accompanying drawings, so that those of ordinary skill in the art to which the present disclosure pertains can easily implement the technical spirit of the present disclosure. In the present disclosure, if the detailed description of the known technology related to the disclosed subject matter will unnecessarily obscure the key points of the present disclosure, the detailed description will be omitted. In the following, the preferred embodiments according to the present disclosure will be specifically described with reference to the accompanying drawings. In the drawings, the same reference numerals may represent the same or similar components.

[0097] In this document, terms such as "first", "second", etc. are only used to distinguish one component from another. Therefore, the components should not be limited by the terms. Of course, unless otherwise stated, the first component may be the second component.

[0098] Throughout the disclosure, unless otherwise clearly stated to the contrary, each component may be provided as a single component or multiple components.

[0099] When any component is described as being "on (or under) the upper (or lower) part" of another component or "above (or below)", any component may be directly above (or below) the other component. However, additional components may be inserted between any component and the other component located above (or below) any component.

[0100] When any component is described as being "connected", "joined" or "coupled" to another component, any component may be directly connected or joined to the other component. However, additional components may be "inserted between" the two components, or the two components may be "connected", "joined" or "coupled" through additional components.

[0101] Unless otherwise expressly stated, the singular forms "a", "an" and "the" are also intended to include the plural forms. It should be understood that the terms "comprising", "including", etc. set forth herein should not be construed as necessarily including all of the recited components or steps, but may be construed as excluding some of the recited components or steps or may be construed as including additional components or steps.

[0102] [Battery module]

[0103] Figures 4 to 6 are a perspective view, an exploded perspective view, and a front view showing a battery module of an embodiment.

[0104] Referring to Figures 4 to 6 , a battery module 10 of an embodiment may include a battery cell assembly 100 and a frame 200.

[0105] [Battery cell assembly]

[0106] The battery cell assembly 100 may include a reference plate 110, a first stacked portion 120, and a second stacked portion 130.

[0107] The battery cell assembly 100 may be accommodated in an internal space S of the frame 200. For example, the battery cell assembly 100 may be inserted into the internal space S of the frame 200 in a second direction (e.g., the front-rear direction).

[0108] The reference plate 110 may extend in a first direction (e.g., the vertical direction) and a second direction (e.g., the front-rear direction) intersecting the first direction. The reference plate 110 may have a predetermined thickness in a third direction (e.g., the left-right direction) intersecting the first direction and the second direction. The reference plate 110 may be formed as a plate.

[0109] The reference plate 110 may be accommodated in a predetermined portion P1 of the internal space S of the frame 200. Two ends of the reference plate 110 in the first direction may be joined to two inner surfaces of the predetermined portion P1 in the first direction.

[0110] The reference plate 110 may have bending resistance in the third direction. For example, the reference plate 110 may be made of a metal material.

[0111] Therefore, even if the first stacked portion 120 or the second stacked portion 130 presses the reference plate 110 in the third direction due to the expansion of the battery cell C, the reference plate 110 does not press or does not firmly press the second stacked portion 130 or the first stacked portion 120 provided on the opposite side of the reference plate 110 in the third direction. Thus, since the battery module 10 is manufactured by simply inserting the battery cell assembly 100 into the internal space S of the frame 200 and adhering the end portion of the stacked battery cells C on one side in the first direction to the inner surface of the frame facing the internal space S on one side in the first direction, even if the stacked battery cells C of the first stacked portion 120 or the second stacked portion 130 are fixed to a position eccentric toward the reference plate 110 due to manufacturing tolerances (errors), it is possible to prevent the pressure applied between the stacked battery cells C of the first stacked portion 120 or the second stacked portion 130 when the stacked battery cells C expand due to the pressure when the stacked battery cells C of the second stacked portion 130 or the first stacked portion 120 located on the opposite side of the reference plate 110 expand from further increasing. Therefore, it is possible to prevent the bursting or explosion of the battery cell C. Therefore, it is possible to easily and quickly manufacture a battery module 10 having a simple configuration and ensuring improved safety and reliability without incurring a large cost.

[0112] The first stacked portion 120 may be coupled to one side surface (e.g., the left surface) of the reference plate 110 in the third direction. The first stacked portion 120 may include a plurality of battery cells C stacked and coupled to each other in the third direction.

[0113] For example, among the plurality of battery cells C of the first stacked portion 120, the other side surface (e.g., the right surface) of the battery cell C provided at the other side end portion (e.g., the right end portion) of the first stacked portion 120 in the third direction may be coupled to one side surface of the reference plate 110 in the third direction. In addition, one side surface or the other side surface of each battery cell C in the first stacked portion 120 may be coupled to the other side surface or one side surface of an adjacent battery cell C in the first stacked portion 120 in the third direction.

[0114] The first stacked portion 120 may be accommodated in one side portion P2 (e.g., the left portion) of the internal space S of the frame 200. Herein, one side portion P2 may correspond to the space on one side in the third direction of a predetermined portion P1 in the internal space S of the frame 200 with respect to the predetermined portion P1 as a reference.

[0115] The end portion of at least one battery cell C of the first stacked portion 120 on one side (e.g., the lower side) in the first direction may be adhered to the inner surface of the frame facing one side portion P2 on one side in the first direction.

[0116] For example, the lower ends of all the battery cells C of the first stacked portion 120 may be adhered to the inner surface of the frame facing the lower side of one side portion P2.

[0117] The second stacked portion 130 may be coupled to another side surface (e.g., the right surface) of the reference plate 110 in the third direction. The second stacked portion 130 may include a plurality of battery cells C stacked and coupled to each other in the third direction.

[0118] For example, among the plurality of battery cells C of the second stacked portion 130, one side surface (e.g., the left surface) of the battery cell C disposed at one side end portion (e.g., the left end portion) of the second stacked portion 130 in the third direction may be coupled to another side surface of the reference plate 110 in the third direction. In addition, one side surface or the other side surface of each battery cell C in the second stacked portion 130 may be coupled to the other side surface or one side surface of an adjacent battery cell C in the second stacked portion 130 in the third direction.

[0119] The second stacked portion 130 may be received in another side portion P3 (e.g., the right portion) of the internal space S of the frame 200. Herein, the other side portion P3 may correspond to a space on the other side in the third direction of a predetermined portion P1 in the internal space S of the frame 200 with respect to the predetermined portion P1 as a reference.

[0120] One end portion of at least one battery cell C of the second stacked portion 130 on one side in the first direction may be adhered to the inner surface of the frame facing one side in the first direction of the other side portion P3.

[0121] For example, the lower ends of all the battery cells C of the second stacked portion 130 may be adhered to the inner surface of the frame facing the lower side of the other side portion P3.

[0122] In addition, the first stacked portion 120 or the second stacked portion 130 may further include an elastic member E. Hereinafter, the elastic member E will be described with reference to Figures 7 to 9 to describe the elastic member E.

[0123] [Frame]

[0124] The frame 200 may have an internal space S. The battery cell assembly 100 may be received in the internal space S.

[0125] The internal space S may include a predetermined portion, one side portion P2, and another side portion P3.

[0126] The reference plate 110 can be accommodated in the predetermined portion P1. The position of the predetermined portion P1 can be determined based on the lengths of the first stacked portion 120 and the second stacked portion 130 in the third direction. The two inner surfaces of the frame facing the predetermined portion P1 in the first direction can be coupled to the two end portions of the reference plate 110 in the first direction.

[0127] One side portion P2 can correspond to the space on one side in the third direction of the predetermined portion P1 with respect to the predetermined portion P1. The first stacked portion 120 can be accommodated in one side portion P2.

[0128] The other side portion P3 can correspond to the space on the other side in the third direction of the predetermined portion P1 with respect to the predetermined portion P1. The second stacked portion 130 can be accommodated in the other side portion P3.

[0129] One end portions of at least one battery cell C in the first direction of the first stacked portion 120 and the second stacked portion 130 can be respectively adhered to the inner surfaces on one side in the first direction of the frame facing one side portion P2 and the other side portion P3. For example, an adhesive resin R can be coated on the inner surfaces on one side in the first direction of the frame facing one side portion P2 and the other side portion P3, and one end portions of at least one battery cell C in the first direction of the first stacked portion 120 and the second stacked portion 130 can be respectively adhered to the adhesive resin R coated on the inner surfaces on one side in the first direction of the frame facing one side portion P2 and the other side portion P3.

[0130] As described above, the stacked battery cells C of the battery cell assembly 100 are divided into the stacked battery cells C of the first stacked portion 120 and the stacked battery cells C of the second stacked portion 130 by the reference plate 110, and the stacked battery cells C of the first stacked portion 120 and the stacked battery cells C of the second stacked portion 130 are respectively accommodated in one side portion P2 and the other side portion P3 of the inner space S of the frame 200. Therefore, the number of a group of stacked battery cells C can be reduced.

[0131] For example, when the total number of the battery cells C is 12, the number of a group of stacked battery cells C in the prior art is 12( Figures 1 to 3 ). However, in the present disclosure, the number of a group of stacked battery cells C can be 6( Figures 4 to 6 ).

[0132] Therefore, since the battery cell assembly 100 is inserted into the inner space S of the frame 200 and one end of the stacked battery cells C on one side in the first direction adheres to the inner surface of the frame on one side in the first direction facing the inner space S, even if the stacked battery cells C are fixed to a position eccentric to either side in the third direction due to manufacturing tolerances (errors), the cumulative (maximum) tolerance (error) of the position of the battery cell C that is attached and fixed to the inner surface of the inner space S of the frame 200 and is set to be the farthest from the reference plate 110 in the third direction among a group of stacked battery cells C can be reduced. Therefore, in the case where a group of stacked battery cells C expands, the pressure applied between the battery cells C can be reduced, preventing bursting or explosion of the battery cells C. That is, it is possible to easily and quickly manufacture a battery module 10 with a simple configuration and ensure improved safety and reliability without incurring a large cost.

[0133] For example, in the prior art, the cumulative (maximum) tolerance (error) of the position of the outermost battery cell C that is attached and fixed to the inner surface of the inner space S of the frame 200 among a group of stacked battery cells C can be D( Figures 1 to 3 ). In the present disclosure, the cumulative (maximum) tolerance (error) of the position of the outermost battery cell C that is attached and fixed to the inner surface of the inner space S of the frame 200 among a group of stacked battery cells C can be reduced to D1 or D2 (refer to Figures 4 to 6 ).

[0134] In addition, since the reference plate 110 is accommodated in a predetermined portion P1 of the inner space S of the frame 200, the battery cell assembly 100 can be easily fixed and set in an appropriate position of the frame 200. In particular, since the battery cell assembly 100 is not fixed and set eccentrically to any side in the third direction of the inner space S of the frame 200, the spaces P2 and P3 accommodating the first stacked portion 120 and the second stacked portion 130 can have appropriate dimensions. Therefore, even if the battery cells C of the first stacked portion 120 or the battery cells C of the second stacked portion 130 expand, bursting or explosion of the battery cells C can be prevented. Therefore, it is possible to easily and quickly manufacture a battery module 10 with a simple configuration and ensure improved safety and reliability without incurring a large cost.

[0135] The guiding portions G can be formed on the inner surfaces of both sides of the frame in the first direction facing the predetermined portion P1 and extend in the second direction. For example, the guiding portions G can be guiding grooves extending in the second direction, but are not limited thereto.

[0136] The ends of both sides of the reference plate 110 in the first direction can be inserted into the inner space S along the guiding portions G in the second direction.

[0137] Therefore, the battery cell assembly 100 can be easily fixed and installed at an appropriate position on the frame 200. Therefore, the battery module 10 with a simple configuration can be easily and quickly manufactured while ensuring improved safety and reliability without incurring a large cost.

[0138] The predetermined portion P1 can be set at a position where the ratio of the width in the third direction of one side portion P2 to the width in the third direction of the other side portion P3 corresponds to the ratio of the length in the third direction of the first stacked portion 120 to the length in the third direction of the second stacked portion 130.

[0139] Therefore, for example, the space accommodating the first stacked portion 120 and the second stacked portion 130 can have an appropriate size proportional to the number of battery cells C in the first stacked portion 120 and the second stacked portion 130. Therefore, even if the battery cells C in the first stacked portion 120 or the second stacked portion 130 expand, bursting or explosion of the battery cells C can be prevented, ensuring improved stability and reliability of the battery module 10.

[0140] [Elastic member]

[0141] Figures 7 to 9 is a front view of a battery module showing another embodiment. Describe the differences between the battery module of one embodiment and the battery module of another embodiment.

[0142] As described above, the first stacked portion 120 or the second stacked portion 130 may further include one or more elastic members E.

[0143] One or more elastic members E may be disposed between the battery cells C of the first stacked portion 120 or the second stacked portion 130. Each elastic member E may contract (e.g., in the third direction) as the battery cell C expands. Each elastic member E may absorb the pressure caused by the expansion of the battery cell C. Each elastic member E may be made of a porous material or a foam synthetic resin.

[0144] One or more elastic members E may be disposed between the battery cells C adjacent to each other among different pairs of battery cells in the first stacked portion 120 or the second stacked portion 130 ( Figures 7 to 9 ).

[0145] Therefore, the elastic member E can absorb or offset the expansion and assembly tolerances of the stacked battery cells C in the first stacked portion 120 or the second stacked portion 130, ensuring improved safety and reliability of the battery module 10.

[0146] The first stacked portion 120 or the second stacked portion 130 may include a plurality of elastic members E. At this time, the plurality of elastic members E may include a first elastic member E1 and a second elastic member E2 disposed to be farther from the reference plate 110 than the first elastic member E1 in the third direction. The thickness of the second elastic member E2 in the third direction may be greater than the thickness of the first elastic member E1 in the third direction.( Figure 7 and Figure 9 ).

[0147] Therefore, the second elastic member E2 disposed to be farther from the reference plate 110 than the first elastic member E1 in the third direction may further absorb or offset the expansion and assembly tolerances of the battery cell C compared to the first elastic member E1. Therefore, since a set of battery cells C are stacked in the first stacked portion 120 or the second stacked portion 130 and fixed to the frame 200, even if the cumulative expansion and tolerances of the battery cells C disposed to be farther from the reference plate 110 in the third direction increase, resulting in an increase in pressure, the second elastic member E2 can also effectively absorb or offset the cumulative expansion and tolerances of the battery cells C. Therefore, the safety and reliability of the battery module 10 can be further improved.

[0148] As described above, the first stacked portion 120 or the second stacked portion 130 may include a plurality of elastic members E. At this time, in the third direction, the thickness of each elastic member E may be greater than the thickness of another elastic member E disposed to be closer to the reference plate 110 than the elastic member E in the third direction.( Figure 7 and Figure 9 ).

[0149] Therefore, as the elastic member E becomes farther from the reference plate 110 in the third direction, the elastic member further absorbs or offsets the expansion and assembly tolerances of the battery cell C. Therefore, since a set of battery cells C are stacked in the first stacked portion 120 or the second stacked portion 130 and fixed to the frame 200, such that as the battery cells C become farther from the reference plate 110 in the third direction, even if the cumulative expansion and tolerances of the battery cells C increase, resulting in an increase in pressure, the elastic member E can also effectively absorb or offset the cumulative expansion and tolerances of the battery cells C. Therefore, the safety and reliability of the battery module 10 can be further improved.

[0150] At this time, the number of battery cells C stacked between adjacent elastic members E may be the same as the number of battery cells C stacked between the reference plate 110 and the elastic member E adjacent to the reference plate 110.

[0151] For example, as Figure 7As shown, the number of battery cells C stacked between the first elastic member E1 and the second elastic member E2 adjacent to each other can be two, which is the same as the number of battery cells C stacked between the reference plate 110 and the first elastic member E1 adjacent to the reference plate 110.

[0152] Therefore, the number of battery cells C provided on one side or the other side in the third direction of each elastic member E does not need to be changed according to the elastic member E, enabling the easy manufacture of the battery cell assembly 100 at a lower cost.

[0153] As described above, the first stacking portion 120 or the second stacking portion 130 may include a plurality of elastic members E, and the plurality of elastic members E may include a first elastic member E1 and a second elastic member E2 provided to be farther from the reference plate 110 than the first elastic member E1 in the third direction. At this time, the number of battery cells C stacked between the second elastic member E2 and the elastic member E adjacent to the second elastic member E2 and provided on the reference plate 110 side may be less than the number of battery cells C stacked between the first elastic member E1 and the reference plate 110 adjacent to the first elastic member E1 or stacked between the first elastic member E1 and the elastic member E adjacent to the first elastic member E1 and provided on the reference plate 110 side ( Figure 8 and Figure 9 ).

[0154] For example, as Figure 8 and Figure 9 shown, the number of battery cells C stacked between the second elastic member E2 and the first elastic member E1 adjacent to the second elastic member E2 and provided on the reference plate 110 side is two, which is less than the three battery cells C stacked between the first elastic member E1 and the reference plate 110 adjacent to the first elastic member E1.

[0155] Therefore, the expansion and assembly tolerances of the battery cells C provided to be farther from the reference plate 110 in the third direction can be further absorbed or offset. Thus, since a set of battery cells C is stacked in the first stacking portion 120 or the second stacking portion 130 and fixed to the frame 200, even if the cumulative expansion and tolerances of the battery cells C provided to be farther from the reference plate 110 in the third direction increase, resulting in an increase in pressure, the second elastic member E2 can effectively absorb or offset the cumulative expansion and tolerances of the battery cells C. Therefore, the safety and reliability of the battery module 10 can be further improved.

[0156] As described above, the first stacked portion 120 and the second stacked portion 130 may include a plurality of elastic members E. At this time, the number of battery cells C stacked between each elastic member E and an elastic member E adjacent to the elastic member E and disposed on the side of the reference plate 110 may be less than the number of battery cells C stacked between another elastic member E disposed closer to the reference plate 110 than each elastic member E in the third direction and the reference plate 110 adjacent to the other elastic member E or stacked between another elastic member E and an elastic member E adjacent to the other elastic member E and disposed on the side of the reference plate 110 ( Figure 8 and Figure 9 ).

[0157] For example, as Figure 8 and Figure 9 shown, the number of battery cells C stacked between the second elastic member E2 and the first elastic member E1 adjacent to the second elastic member E2 and disposed on the side of the reference plate 110 is 2, which is less than the three battery cells C stacked between the first elastic member E1 disposed closer to the reference plate 110 than the second elastic member E2 in the third direction and the reference plate 110 adjacent to the first elastic member E1.

[0158] Therefore, the expansion and assembly tolerances of the battery cells C disposed further away from the reference plate 110 in the third direction can be further absorbed or offset. Therefore, since a set of battery cells C is stacked in the first stacked portion 120 or the second stacked portion 130 and fixed to the frame 200, as the battery cells C become further away from the reference plate 110 in the third direction, even if the cumulative expansion and tolerances of the battery cells C increase, resulting in an increase in pressure, the second elastic member E will effectively absorb or offset the cumulative expansion and tolerances of the battery cells C. Therefore, the safety and reliability of the battery module 10 can be further improved.

[0159] At this time, the thicknesses of the plurality of elastic members E in the third direction may all be the same ( Figure 8 ).

[0160] Therefore, it is not necessary to change the thickness of the elastic member E in the third direction according to the position of the elastic member E, so that the battery cell assembly 100 can be easily manufactured at a low cost.

[0161] Different from the thickness of the elastic member E in the third direction described above, the thickness of each elastic member E may be greater than the thickness of another elastic member E disposed closer to the reference plate 110 than the elastic member E in the third direction ( Figure 9 ).

[0162] For example, as Figure 9As shown, in the third direction, the thickness of the second elastic member E2 can be greater than the thickness of the first elastic member E1 which is arranged to be closer to the reference plate 110 than the second elastic member E2 in the third direction.

[0163] Therefore, as the elastic member E becomes farther from the reference plate 110 in the third direction, the expansion and assembly tolerance of the battery cell C can be more effectively absorbed or offset. Thus, since a group of battery cells C are stacked in the first stacking portion 120 or the second stacking portion 130 and fixed to the frame 200, as the battery cell C becomes farther from the reference plate 110 in the third direction, even if the cumulative expansion and tolerance of the battery cell C increase, resulting in an increase in pressure, the second elastic member E will effectively absorb or offset the cumulative expansion and tolerance of the battery cell C. Therefore, the safety and reliability of the battery module 10 can be further improved.

[0164] In all respects, the above embodiments are provided by way of example and not in a limiting way. In addition, the meaning and scope of the present disclosure are defined by the claims described below rather than the details of the detailed description, and all modifications and changes made according to the meaning and scope of the claims and their equivalents will be construed as being included within the scope of the present disclosure.

[0165] The embodiments have been described above with reference to their multiple illustrative embodiments. However, the embodiments are not limited to the embodiments and drawings set forth herein, and those skilled in the art can obtain many other modifications and embodiments within the technical scope of the present disclosure. In addition, although not explicitly described in the description of the embodiments, the effects and predictable effects based on the configurations in the present disclosure are also included within the scope of the present disclosure.

Claims

1. A battery module, characterized in that, Comprising: A battery cell assembly (100), including a reference plate (110), a first stacked portion (120), and a second stacked portion (130). The reference plate (110) extends in a first direction and a second direction intersecting the first direction, and has a predetermined thickness in a third direction intersecting the first direction and the second direction. The first stacked portion (120) is joined to a first side surface of the reference plate (110) in the third direction, and includes a plurality of battery cells (C) stacked and joined to each other in the third direction. The second stacked portion (130) is joined to a second side surface of the reference plate (110) opposite to the first side surface in the third direction, and includes a plurality of battery cells (C) stacked and joined to each other in the third direction; and A frame (200), in a state where the first stacked portion (120) and the second stacked portion (130) are joined to the reference plate (110), the frame (200) has an internal space (S) into which the battery cell assembly (100) is inserted and accommodated, and the battery cell assembly (100) is inserted and accommodated in the internal space (S), wherein the internal space (S) includes a predetermined portion (P1), one side portion (P2), and the other side portion (P3). The predetermined portion (P1) accommodates the reference plate (110). The one side portion (P2) corresponds to a space on one side of the predetermined portion (P1) in the third direction and accommodates the first stacked portion (120). The other side portion (P3) corresponds to a space on the other side of the predetermined portion (P1) in the third direction and accommodates the second stacked portion (130), wherein the position of the predetermined portion (P1) is determined based on the length of the first stacked portion (120) and the second stacked portion (130) in the third direction, wherein both end portions of the reference plate (110) on both sides in the first direction are joined to the inner surfaces on both sides of the frame facing the predetermined portion (P1) in the first direction, wherein one end portion of at least one of the battery cells (C) of the first stacked portion (120) on one side in the first direction adheres to the inner surface on one side of the frame facing the one side portion (P2) in the first direction, and wherein one end portion of at least one of the battery cells (C) of the second stacked portion (130) on one side in the first direction adheres to the inner surface on one side of the frame facing the other side portion (P3) in the first direction.

2. The battery module according to claim 1, wherein The reference plate (110) has bending resistance stiffness in the third direction.

3. The battery module according to claim 1, wherein Guide portions (G) are formed on the inner surfaces on both sides of the frame facing the predetermined portion (P1) in the first direction, and the guide portions (G) extend in the second direction, and Among them, the end portions on both sides of the reference plate (110) in the first direction are inserted into the internal space (S) along the guiding portion (G) in the second direction.

4. The battery module according to claim 1, characterized in that, The position where the ratio of the width in the third direction of the predetermined portion (P1) provided on one side portion (P2) to the width in the third direction of the other side portion (P3) corresponds to the ratio of the length in the third direction of the first stacked portion (120) to the length in the third direction of the second stacked portion (130).

5. The battery module according to claim 1, characterized in that, The first stacked portion (120) or the second stacked portion (130) further includes one or more elastic members (E), and the one or more elastic members (E) are disposed between the battery cells (C) of the first stacked portion (120) or the second stacked portion (130) and contract as the battery cells (C) expand, and Among them, the one or more elastic members (E) are respectively disposed between the battery cells (C) adjacent to each other in different pairs of battery cells (C).

6. The battery module according to claim 5, characterized in that, The first stacked portion (120) or the second stacked portion (130) includes a plurality of elastic members (E). Among them, the plurality of elastic members (E) include a first elastic member (E1) and a second elastic member (E2), and the second elastic member (E2) is disposed farther from the reference plate (110) than the first elastic member (E1) in the third direction, and Among them, the thickness of the second elastic member (E2) in the third direction is greater than the thickness of the first elastic member (E1) in the third direction.

7. The battery module according to claim 5, characterized in that, The first stacked portion (120) or the second stacked portion (130) includes a plurality of elastic members (E), and Among them, in the third direction, the thickness of each elastic member (E) is greater than the thickness of another elastic member (E) disposed closer to the reference plate (110) than each elastic member (E) in the third direction.

8. The battery module according to claim 7, characterized in that, The number of battery cells (C) stacked between adjacent elastic members (E) is the same as the number of battery cells (C) stacked between the reference plate (110) and the elastic member (E) adjacent to the reference plate (110).

9. The battery module according to claim 5, characterized in that, The first stacked portion (120) or the second stacked portion (130) includes a plurality of elastic members (E). Among them, the plurality of elastic members (E) include a first elastic member (E1) and a second elastic member (E2), and the second elastic member (E2) is disposed farther from the reference plate (110) than the first elastic member (E1) in the third direction, and Among them, the number of battery cells (C) stacked between the second elastic member (E2) and the elastic member (E) adjacent to the second elastic member (E2) and arranged closer to the reference plate (110) is less than the number of battery cells (C) stacked between the first elastic member (E1) and the reference plate (110) or stacked between the first elastic member (E1) and the elastic member (E) adjacent to the first elastic member (E1) and arranged closer to the reference plate (110).

10. The battery module according to claim 5, characterized in that, The first stacked portion (120) or the second stacked portion (130) includes a plurality of elastic members (E), and Among them, the number of battery cells (C) stacked between one elastic member (E) and the elastic member (E) adjacent to the one elastic member (E) and arranged closer to the reference plate (110) is less than the number of battery cells (C) stacked between another elastic member (E) arranged closer to the reference plate (110) than the one elastic member (E) in the third direction and the reference plate (110) adjacent to the another elastic member (E) or stacked between the another elastic member (E) and the elastic member (E) adjacent to the another elastic member (E) and arranged closer to the reference plate (110).

11. The battery module according to claim 10, characterized in that, The plurality of elastic members (E) have the same thickness in the third direction.

12. The battery module according to claim 10, characterized in that, In the third direction, the thickness of the one elastic member (E) is greater than the thickness of another elastic member (E) arranged closer to the reference plate (110) than the one elastic member (E) in the third direction.

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