Battery cell stack assembly and battery pack including the same

Abstract

The present technology relates to a battery cell stack assembly and a battery pack including the same. The battery cell stack assembly includes: a battery cell stack having a plurality of stacked battery cells, electrode leads extending from both sides of the plurality of battery cells; bus bar frames including bus bars electrically connected to the respective electrode leads and attached to front and rear surfaces of the battery cell stack, respectively; and a first side member and a second side member coupled to one side end and the other side end of the bus bar frame, respectively, to support one side and the other side of the battery cell stack, respectively, the first side member including a support portion supporting one side of the battery cell stack and a plate-shaped pressing portion formed at an end of the support portion and perpendicular to the support portion. The battery pack includes a pack case providing a space in which battery cell stack assemblies are disposed, and a pair of battery cell stack assemblies disposed adjacent to each other, a first side rail of one battery cell stack assembly being disposed in the pack case such that a second side rail of the other battery cell stack assembly is coupled with the first side rail.

Description

Technical Field

[0001] The present disclosure relates to a battery cell stack assembly and a battery pack including the battery cell stack assembly. More specifically, the present disclosure provides a battery cell stack assembly having a side beam structure shaped to press upper portions of a plurality of battery cells included in the battery cell stack assembly, and a battery pack that improves the supporting force of the battery cell stack assembly accommodated by the side beam structure.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0167130 filed on December 2, 2022 and Korean Patent Application No. 10-2023-0037378 filed on March 22, 2023, the entire contents of which are incorporated herein by reference. Background Art

[0003] Types of secondary batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, etc. The operating voltage of such a unit secondary battery cell (in other words, a unit battery cell) is about 2.5V to 4.2V. Therefore, if a higher output voltage is required, a plurality of battery cells can be connected in series to form a battery pack. In addition, according to the required charge and discharge capacity of the battery pack, a plurality of battery cells can be connected in parallel to form a battery pack. Therefore, the number of battery cells included in the above-mentioned battery pack can vary according to the required output voltage or charge and discharge capacity.

[0004] For example, when a plurality of battery cells are connected in series / parallel to form a battery pack, a battery module including the plurality of battery cells is first constructed.

[0005] Figure 1 An example of a conventional battery module is shown, and Figure 1 is a perspective view of the battery cell stack assembly 10, wherein the battery cells 30 are exposed to the outside. Specifically, Figure 1 The battery cell stack assembly 10 shown in FIG. 1 includes a bus bar frame 50 having electrode leads extending from both sides and covering the electrode leads located in front and rear of a plurality of battery cells 30 stacked in one direction.

[0006] like Figure 1 The illustrated form has the advantage of being lighter in weight than conventional battery modules, wherein a module frame surrounding and protecting the internal battery cells 30 is omitted.

[0007] Figure 2 are perspective and front views of a conventional battery cell stack assembly 10 having side members 40 coupled to side portions of a battery cell stack 20 to support the respective side portions, and Figure 3 is combined with Figure 2FIG. 4 is a diagram showing the shape of the side beam 40 at each side portion.

[0008] Figure 2 The battery cell stack assembly 10 of (a) is characterized in that a side beam 40 is used to improve the side support force of the battery cell stack assembly 10. Figure 2 As shown in (b), a pair of side beams 40 are respectively formed with protrusions 41 at the upper and lower ends, wherein the protrusions 41 are formed with steps so that the protrusions 41 have a joint shape. Specifically, as Figure 3 As shown, on one side of the battery cell stack 20 , the side beam 40 includes a first side beam 40 a having a protrusion 41 formed on an upper side thereof and a second side beam 40 b having a protrusion 41 formed on a lower side thereof.

[0009] Figure 4 Shows that it contains Figure 2 The battery pack housing 60 of the battery cell stack assembly 10, wherein the bottom plate 70, the side wall 80 and the main wall 90 respectively support the lower part and the side part of the battery cell stack assembly 10. Figure 2 The battery pack case 60 of the battery cell stack assembly 10 of the illustrated form is advantageous in that the side walls 80 and the main wall 90 are combined with each other to separate the battery cell stack assembly 10 , and a separate partition wall or the like for partitioning the internal space is not required.

[0010] Figure 5 Shown accommodated in Figure 4 A pair of battery cell stack assemblies 10 are provided in the internal space of the battery pack housing 60. Figure 5 As shown, a pair of adjacent battery cell stack assemblies 10 are engaged and coupled to each other by first and second side beams 40 a and 40 b provided at sides of the respective battery cell stack assemblies 10 .

[0011] Figure 6 The battery pack case 60 filled with battery cell stack assemblies 10 is shown, wherein the respective battery cell stack assemblies 10 are coupled to each other by side beams 40. Here, the coupled first and second side beams 40a, 40b replace conventional partition walls.

[0012] As above Figures 1 to 6 As shown, the battery cell stack assembly 10 omitting the module frame has the advantage of being light in weight, but has the disadvantage of exposing the battery cells 30 , which provides a weak supporting force on the top of the battery cell stack 20 . Summary of the invention

[0013] Technical issues

[0014] Therefore, the present disclosure is directed to solving the above-mentioned problems, and is directed to providing a battery cell stack assembly having improved upper supporting force and a battery pack including the battery cell stack assembly.

[0015] Other objects and advantages of the present disclosure will be understood from the following description, will become more apparent from the embodiments of the present disclosure, and will be easily understood that the objects and advantages of the present disclosure can be achieved by the methods and combinations disclosed in the claims of this patent.

[0016] Technical Solution

[0017] The present disclosure provides a battery cell stack, which has a plurality of stacked battery cells, electrode leads extending from both sides of the plurality of battery cells; a bus bar frame, which includes bus bars electrically connected to the respective electrode leads, and the bus bar frame is respectively attached to the front surface and the rear surface of the battery cell stack; a first side beam, which is combined with one side end of the bus bar frame to support one side of the battery cell stack; and a second side beam, which is combined with the other side end of the bus bar frame to support the other side of the battery cell stack; wherein the first side beam includes: a support portion, which supports the side of the battery cell stack; and a plate-shaped pressing portion, which is formed at an end of the support portion and is perpendicular to the support portion.

[0018] The pressing portion is formed on the top of the supporting portion, and the cross-section of the first side beam may be "T" shaped.

[0019] The pressing portion may be formed at an end portion of the supporting portion in a shape protruding to both sides of the supporting portion.

[0020] The pressing portion may be formed to extend along a length direction of the first side beam.

[0021] The first and second side beams may include a protrusion that protrudes in a height direction of the battery cell stack and forms a step.

[0022] The protrusion may include an upper protrusion formed at an upper portion of the first side beam, and a lower protrusion formed at a lower portion of the second side beam.

[0023] The first side beam and the second side beam may have a shape in which an upper protrusion and a lower protrusion are engaged with each other and combined.

[0024] The cushion may be attached to a bottom of the pressing portion of the first side member.

[0025] The present disclosure provides a battery pack, comprising: a battery pack housing, which provides a space for accommodating a battery cell stack assembly; and a pair of battery cell stack assemblies, which are arranged adjacent to each other, and are characterized in that a first side beam of one battery cell stack assembly is arranged in the battery pack housing, so that a second side beam of another battery cell stack assembly is combined with the first side beam.

[0026] The pressing portion of the first side beam included in one battery cell stack assembly may support upper portions of a pair of battery cell stacks respectively located on both sides of the first side beam.

[0027] The pressing portion may be formed at the top of the supporting portion in a shape protruding to both sides of the supporting portion, the pressing portion may press the upper portion of the battery cell stack included in the battery cell stack assembly, the battery cell stack assembly including the supporting portion, one side of the supporting portion having the protrusion, and the pressing portion may press the upper portion of the battery cell stack included in another battery cell stack assembly, the other battery cell stack assembly being arranged adjacent to the supporting portion and the other side of the supporting portion having the protrusion.

[0028] A pressing portion included in one of a pair of battery cell stack assemblies disposed adjacently may be screw-coupled to a bus bar frame included in the other battery cell stack assembly.

[0029] The first side beam and the second side beam may include a combining hole formed to penetrate the protrusion in a vertical direction, and any adjacent pair of battery cell stack assemblies may be combined so that the position of the combining hole included in the first side beam of one battery cell stack assembly is consistent with the position of the combining hole included in the second side beam of another battery cell stack assembly.

[0030] The coupled pair of battery cell stack assemblies may be screw-coupled by a coupling member penetrating coupling holes in the first side beam and the second side beam coupled to the first side beam.

[0031] Beneficial Effects

[0032] The present disclosure may provide a battery pack having improved energy efficiency by reducing weight.

[0033] Furthermore, according to the present disclosure, a battery cell stack assembly that increases safety by improving an upper supporting force and a battery pack including the battery cell stack assembly may be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 An example of a conventional battery module is shown.

[0035] Figure 2 A conventional battery cell stack assembly with side beams is shown.

[0036] Figure 3 is a perspective view of the side beam.

[0037] Figure 4 Shows that it contains Figure 2 A battery pack housing of a battery cell stack assembly.

[0038] Figure 5 Shown accommodated in Figure 4A pair of battery cell stack assemblies are provided in the interior space of the battery pack housing.

[0039] Figure 6 FIG. 1 is a diagram showing a battery pack housing filled with battery cell stack assemblies.

[0040] Figure 7 is a perspective view of a battery cell stack assembly of the present disclosure.

[0041] Figure 8 It is a front view of the battery cell stack assembly.

[0042] Fig. 9 is a perspective view of a battery pack according to a first embodiment of the present disclosure.

[0043] Fig.10 yes Fig. 9 A cross-sectional view of a portion of a battery pack housing.

[0044] Fig.11 Show Fig. 9 A pair of adjacent battery cell stack assemblies are combined in a battery pack housing.

[0045] Fig.12 yes Fig.11 A front view of one of the combined battery cell stack assemblies.

[0046] Fig.13 is a perspective view of a pair of battery cell stack assemblies adjacently accommodated in a battery pack according to a second embodiment of the present disclosure.

[0047] Fig.14 yes Fig.13 Front view of a battery cell stack assembly.

[0048] Fig.15 yes Fig.13 A modified example of a battery cell stack assembly.

[0049] Fig.16 is a perspective view of a pair of battery cell stack assemblies included in a battery pack according to a third embodiment of the present disclosure.

[0050] Fig.17 is a front view of a battery cell stack assembly included in a battery pack according to a fourth embodiment of the present disclosure.

[0051] Fig.18 is a front view of a pair of battery cell stack assemblies coupled to each other. DETAILED DESCRIPTION

[0052] The present disclosure will now be described in detail with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. It should therefore be understood that the terms and words used in the specification and claims should not be interpreted in their ordinary or dictionary meanings, but should be interpreted in meanings and concepts consistent with the technical concept of the present disclosure based on the principle that the inventor can define the concepts of terms that he deems appropriate to best describe the present disclosure.

[0053] However, it will be understood that the present disclosure is not limited to the specific embodiments, and includes all modifications, equivalents, or replacements within the spirit and technical scope of the present disclosure.

[0054] Additionally, in describing the present disclosure, in the case where a detailed description of a configuration or function of the relevant disclosure is considered to obscure the subject matter of the present disclosure, such a detailed description is omitted.

[0055] The present disclosure is shown in the embodiments to more completely explain the present disclosure to those skilled in the art, and therefore, for the sake of clarity, the shapes and sizes of the components in the drawings may be magnified, omitted or schematically shown. Therefore, the size or ratio of each component does not necessarily represent its actual size or ratio.

[0056] The present disclosure relates to a battery cell stack assembly and a battery pack including the battery cell stack assembly. More specifically, the present disclosure provides a battery cell stack assembly having a side beam structure shaped to press upper portions of a plurality of battery cells included in the battery cell stack assembly, and a battery pack that improves the supporting force of the battery cell stack assembly accommodated by the side beam structure.

[0057] Figures 7 and 8 The battery cell stack assembly disclosed herein, Figures 9 to 12 Relating to a battery pack according to a first embodiment of the present disclosure, Figures 13 to 15 Relating to a battery pack according to a second embodiment of the present disclosure, Fig.16 relates to a battery pack according to a third embodiment of the present disclosure, and Figure 17 to Figure 18 A battery pack according to a fourth embodiment of the present disclosure is provided.

[0058] In the following, reference will be made to Figures 7 to 17 A battery cell stack assembly and a battery pack of the present disclosure are described.

[0059] Battery cell stack assembly 400

[0060] Figure 7 is a perspective view of a battery cell stack assembly 400 of the present disclosure, and Figure 8 4 is a front view of the battery cell stack assembly 400 .

[0061] The battery cell stack assembly 400 includes a battery cell stack 410 in which a plurality of battery cells 411 are stacked, a bus bar frame 420 coupled to the front and rear surfaces of the battery cell stack 410 , and a pair of side beams 430 a , 430 b respectively coupled to both sides of the battery cell stack 410 .

[0062] The battery cell stack 410 includes a plurality of battery cells 411 from both sides of which electrode leads (not shown) are led out. More specifically, the battery cell stack 410 includes a plurality of battery cells 411 stacked in one direction.

[0063] The battery cell stack 410 includes bus bars (not shown) electrically connected to respective electrode leads of the battery cell stack 410 , wherein bus bar frames 420 are respectively coupled to the front and rear sides of the battery cell stack 410 to cover the electrode leads.

[0064] The battery cell stack 410 includes side beams 430a, 430b, which include a first side beam 430a coupled to one side of the battery cell stack 410 and a second side beam 430b coupled to the other side of the battery cell stack 410. More specifically, the first side beam 430a is coupled to one side end of the bus bar frame 420 to support one side of the battery cell stack 410, and the second side beam 430b is coupled to the other side end of the bus bar frame 420 to support the other side of the battery cell stack 410.

[0065] The battery cell stack assembly 400 of the present disclosure has a shape in which the first side beam 430a presses the upper portion of the battery cell stack 410. Specifically, the first side beam 430a is characterized in that the first side beam 430a includes a support portion P2 supporting the side of the battery cell stack 410 and a pressing portion P1 pressing the upper portion of the battery cell stack 410.

[0066] The battery cell stack 410 is characterized by: Figure 7 and Figure 8 As shown, the first side beam 430 a includes a support portion P2 supporting one side of the battery cell stack 410 and a plate-shaped pressing portion P1 formed at an end of the support portion P2 and perpendicular to the support portion P2 .

[0067] The pressing portion P1 is formed on the top of the supporting portion P2.

[0068] The cross section of the first side beam 430a including the support portion P2 and the pressing portion P1 combined with the top of the support portion P2 has a "T" shape as shown in the drawings. In other words, the pressing portion P1 is formed at the end of the support portion P2 to protrude to both sides of the support portion P2.

[0069] like Figure 7As shown, the pressing portion P1 is formed to extend along the length direction of the first side beam 430 a and presses the upper portion of the adjacent battery cell stack 410 along the length direction of the battery cell stack assembly 400 .

[0070] The first side beam 430 a and the second side beam 430 b each include a protrusion 431 a , 431 b protruding in the height direction of the battery cell stack 410 to form a step.

[0071] The protrusions 431 a , 431 b may be divided into an upper protrusion 431 a formed at an upper portion of the side beams 430 a , 430 b and a lower protrusion 431 b formed at a lower portion of the side beams 430 a , 430 b .

[0072] The first side beam 430 a includes an upper protrusion 431 a , and the second side beam 430 b includes a lower protrusion 431 b .

[0073] The first side beam 430 a and the second side beam 430 b have a shape in which an upper protrusion 431 a and a lower protrusion 431 b are engaged and coupled with each other.

[0074] Battery Pack

[0075] The battery pack of the present disclosure is characterized in that it includes a battery cell stack assembly 400 having a first side beam 430 a at one side, the first side beam 430 a including a pressing portion P1 shaped to press the top of a battery cell stack 410 .

[0076] (First embodiment)

[0077] Fig. 9 is a perspective view of a battery pack according to a first embodiment of the present disclosure.

[0078] like Fig. 9 As shown, the battery pack includes a battery pack case 1000 providing a space for accommodating a plurality of battery cell stack assemblies 400 .

[0079] The battery pack case 1000 includes a bottom plate 100 supporting the lower portion of the battery cell stack assembly 400 , side walls 200 coupled along edges of the bottom plate 100 to support the sides of each battery cell stack assembly 400 , and a main wall 300 coupled to the bottom plate 100 across the middle of the battery pack case 1000 .

[0080] The main wall 300 is formed to extend along the length direction of the pack case 1000 and is combined with the bottom plate 100 so that the inner space of the pack case 1000 is roughly divided into two parts.

[0081] A battery cell stack assembly 400 including a plurality of battery cell stacks is provided on either side of the main wall 300 and is seated on the bottom plate 100. The battery cell stack assembly 400 is provided such that sides of each battery cell stack assembly 400 are provided with side beams 430a, 430b engaged and coupled to each other.

[0082] Specifically, a pair of battery cell stack assemblies 400 disposed adjacent to each other are placed in the battery pack housing 1000 such that a first side beam 430a of one battery cell stack assembly 400 is engaged with a second side beam 430b of the other battery cell stack assembly 400. Therefore, the pressing portions P1 of the first side beams 430a included in the pair of battery cell stack assemblies 400 support upper portions of the pair of battery cell stacks 410 located at respective side portions.

[0083] Fig.10 yes Fig. 9 1 is a cross-sectional view of a portion of a battery pack housing 1000 .

[0084] Reference Fig.10 The first side beam 430a on one side of one battery cell stack assembly 400 is joined to the second side beam 430b on one side of another adjacent battery cell stack assembly 400 in a joined manner. In addition, the pressing portion P1 at the top of the first side beam 430a supports and presses the upper portion of the battery cell stack 410 located on both sides of the combined first side beam 430a and second side beam 430b.

[0085] Specifically, the pressing portion P1 is formed at the top of the supporting portion P2 in a shape protruding to both sides of the supporting portion P2, and presses the upper portion of the battery cell stack 410 included in the battery cell stack assembly 400, the battery cell stack assembly 400 includes the supporting portion P2, and one side of the supporting portion P2 has a protrusion, and presses the upper portion of the battery cell stack 410 included in another battery cell stack assembly 400 disposed adjacent to the supporting portion P2, the other battery cell stack assembly 400 is disposed adjacent to the supporting portion P2, and the other side of the supporting portion P2 has a protrusion.

[0086] Fig.11 Show Fig. 9 A pair of adjacently disposed battery cell stack assemblies 400 are combined in the battery pack housing 1000, and Fig.12 Show Fig.11 FIG. 4 is a front view of a pair of battery cell stack assemblies 400 combined in FIG.

[0087] like Fig.11 and Fig.12As shown, the first side beam 430a and the second side beam 430b included in any one battery cell stack assembly 400 are combined so that the pressing portion P1 covers the second side beam 430b of the other battery cell stack assembly 400. Therefore, the pressing portion P1 between a pair of battery cell stack assemblies 400 supports and presses the upper portions of two adjacent battery cell stacks 410.

[0088] Therefore, the upper portions of the two battery cell stacks 410 may be stably supported by one pressing portion P1 including the first side beam 430 a .

[0089] (Second embodiment)

[0090] The battery pack of the present disclosure may also be screw-coupled to the bus bar frame 420 of another adjacent battery cell stack assembly 400 through the first side beam 430 a included in any one battery cell stack assembly 400 .

[0091] Fig.13 is a perspective view of a pair of battery cell stack assemblies 400 adjacently accommodated in a battery pack according to a second embodiment of the present disclosure, and Fig.14 yes Fig.13 A front view of a battery cell stack assembly 400 is shown.

[0092] Refer to the above Fig.13 and Fig.14 The pressing portion P1 included in one of the pair of adjacent battery cell stack assemblies 400 is coupled to the bus bar frame 420 included in the other battery cell stack assembly 400 by a coupling member B such as a bolt.

[0093] The pressing portion P1 includes a screw hole H1 at a position corresponding to the top of the bus bar frame 420 of another adjacent battery cell stack assembly 400, and the bus bar frame 420 of the other battery cell stack assembly 400 also includes a threaded groove (not shown) at a position corresponding to the screw hole H1. Therefore, the first side beam 430a including the pressing portion P1 is fixed to the other battery cell stack assembly 400 and fixed to each other by the coupling member B that penetrates the screw hole H1 and is screwed to the threaded groove in the bus bar frame 420.

[0094] The battery pack of the present disclosure further has a coupling member B coupled to each corner of the pressing portion P1 to ensure a more stable supporting force through the pressing portion P1.

[0095] Fig.15 yes Fig.13A modification example according to which screw holes H1 are formed at respective corners of the pressing portion P1, and four coupling members B are coupled to the respective screw holes H1. In this case, the coupling members B inserted into the screw holes H1 formed at the front end of the pressing portion P1 are threadedly coupled to the bus bar frame 420 located at the front end of the pair of battery cell stack assemblies 400, and the coupling members B inserted into the screw holes H1 formed at the rear end of the pressing portion P1 are threadedly coupled to the bus bar frame 420 located at the rear end of the pair of battery cell stack assemblies 400.

[0096] (Third Embodiment)

[0097] The battery cell stack assembly 400 of the battery pack of the present disclosure may include a pair of adjacent battery cell stack assemblies 400 engaged and coupled to each other by a coupling member B penetrating through two side beams 430 a , 430 b at one time.

[0098] Fig.16 is a perspective view of a pair of battery cell stack assemblies 400 included in a battery pack according to a third embodiment of the present disclosure.

[0099] Reference Fig.16 The first side beam 430a and the second side beam 430b include a combining hole H2 formed to vertically penetrate the protrusions 431a, 431b, and a pair of adjacent battery cell stack assemblies 400 are combined so that the position of the combining hole H2 included in the first side beam 430a of one battery cell stack assembly 400 is consistent with the position of the combining hole H2 included in the second side beam 430b of the other battery cell stack assembly 400.

[0100] The coupled pair of battery cell stack assemblies 400 are screw-coupled to each other by a coupling member B such as a bolt, which penetrates coupling holes H2 of the first side beam 430 a and the second side beam 430 b coupled to the first side beam 430 a at the same time.

[0101] (Fourth embodiment)

[0102] The battery pack of the present disclosure may have a buffer pad 500 interposed between the pressing portion P1 and the battery cell stack 410 to mitigate impact or the like transmitted from the pressing portion P1 supporting and pressing the upper portion of the battery cell stack 410 .

[0103] Fig.17 is a front view of a battery cell stack assembly 400 included in a battery pack according to a fourth embodiment of the present disclosure, and Fig.18 is a front view of a pair of battery cell stack assemblies 400 coupled to each other.

[0104] Reference Fig.17The buffer pad 500 is attached to the bottom of the pressing portion P1 of the first side beam 430a. The buffer pad 500 is used to prevent the pressing portion P1 of the first side beam 430a from directly contacting the battery cell stack 410 and transmitting impact, and to improve the supporting force of the pressing portion P1.

[0105] The cushion 500 may generally include a material capable of absorbing vibrations. For example, the cushion 500 may be made of polyurethane or the like, and the pressure of the pressing portion P1 is transmitted to the top of the battery cell stack 410 through the cushion 500 .

[0106] As described above, the present disclosure has been described in more detail through the drawings and embodiments. However, since the configuration described in the drawings or embodiments described herein is only one embodiment of the present disclosure and does not represent the entire technical spirit of the present disclosure, it should be understood that when submitting this application, the present disclosure covers various equivalents, modifications and alternatives.

[0107] Description of Reference Numerals

[0108] 10: (Conventional technology) Battery cell stack assembly

[0109] 20: (Conventional technology) Battery cell stack

[0110] 30: (Conventional technology) Battery monomer

[0111] 40: (Conventional technology) side beam

[0112] 40a: (Conventional technology) first side beam

[0113] 40b: (conventional technology) second side beam

[0114] 41: (Conventional technology) protrusion

[0115] 50: (Conventional technology) busbar frame

[0116] 60: (Conventional technology) battery pack housing

[0117] 70: (Conventional technology) bottom plate

[0118] 80: (Conventional technology) side wall

[0119] 90: (Conventional technology) main wall

[0120] 1000: Battery pack housing

[0121] 100: Base plate

[0122] 200: Sidewall

[0123] 300: Main wall

[0124] 400: Battery cell stack assembly

[0125] 410: Battery Cell Stack

[0126] 411: Battery Cell

[0127] 420: Busbar frame

[0128] 430a: First side beam

[0129] 430b: Second side beam

[0130] 431a: Upper protrusion

[0131] 431b: Lower protrusion

[0132] 500: cushion

[0133] B: Combined components

[0134] P1: Pressing part

[0135] P2: Support part

[0136] H1: Screw hole

[0137] H2: Binding hole

Claims

1. A battery cell stack assembly, include: A battery cell stack having a plurality of stacked battery cells, with electrode leads extending from both sides of the plurality of battery cells; a bus bar frame including bus bars electrically connected to each of the electrode leads and attached to the front and rear surfaces of the battery cell stack, respectively; a first side beam coupled to one side end of the busbar frame to support one side of the battery cell stack; as well as a second side beam coupled to another side end of the busbar frame to support another side surface of the battery cell stack; The first side beam includes: a support portion that supports a side portion of the battery cell stack; and a pressing portion that presses an upper portion of the battery cell stack.

2. The battery cell stack assembly according to claim 1, in, The support portion supports a side portion of the battery cell stack, and the plate-shaped pressing portion is formed at an end portion of the support portion and is perpendicular to the support portion.

3. The battery cell stack assembly according to claim 1, in, The pressing portion is formed at the top of the supporting portion, and the cross-section of the first side beam is "T"-shaped.

4. The battery cell stack assembly according to claim 1, in, The pressing portion is formed at an end portion of the supporting portion in a shape protruding to both sides of the supporting portion.

5. The battery cell stack assembly according to claim 1, in, The pressing portion is formed to extend along a length direction of the first side beam.

6. The battery cell stack assembly according to claim 1, in, The first side beam and the second side beam include protrusions that protrude in a height direction of the battery cell stack and form a step.

7. The battery cell stack assembly according to claim 6, in, The protrusion includes an upper protrusion formed at an upper portion of the first side member and a lower protrusion formed at a lower portion of the second side member.

8. The battery cell stack assembly according to claim 7, in, The first side beam and the second side beam have shapes in which the upper protrusion and the lower protrusion are engaged with each other.

9. A battery pack, the battery pack accommodating the battery cell stack assembly according to claim 1, in, The battery pack comprises: a battery pack housing, the battery pack housing providing a space for accommodating the battery cell stack assembly; and A pair of battery cell stack assemblies are arranged adjacent to each other, a first side beam of one of the battery cell stack assemblies is disposed in the battery pack housing so that a second side beam of the other of the battery cell stack assemblies is combined with the first side beam.

10. The battery pack according to claim 9, in, The pressing portion of the first side beam included in one of the battery cell stack assemblies supports upper portions of a pair of battery cell stacks located at both sides of the first side beam, respectively.

11. The battery pack according to claim 10, in, The pressing portion is formed on the top of the supporting portion in a shape protruding to both sides of the supporting portion. The pressing portion presses the upper portion of the battery cell stack included in the battery cell stack assembly, the battery cell stack assembly includes the supporting portion, one side of the supporting portion has a protrusion, and the pressing portion presses the upper portion of the battery cell stack included in another battery cell stack assembly, the other battery cell stack assembly is arranged adjacent to the supporting portion and the other side of the supporting portion has a protrusion.

12. The battery pack according to claim 10, in, The pressing portion included in one of the battery cell stack assemblies of a pair of the battery cell stack assemblies disposed adjacently is screw-coupled to a bus bar frame included in the other battery cell stack assembly.

13. The battery pack according to claim 9, in, The first side beam and the second side beam include a coupling hole formed to penetrate the protrusion in a vertical direction, and Any adjacent pair of battery cell stack assemblies are combined such that the position of the combining hole included in the first side beam of one battery cell stack assembly coincides with the position of the combining hole included in the second side beam of the other battery cell stack assembly.

14. The battery pack according to claim 13, in, The coupled pair of battery cell stack assemblies are screw-coupled by a coupling member penetrating the coupling holes in the first side member and the second side member coupled to the first side member.

15. The battery pack according to claim 9, in, A buffer pad is attached to the bottom of the pressing portion of the first side beam.

Images