Battery cell assembly and battery pack comprising same

Abstract

The invention relates to a battery cell assembly and a battery pack comprising the same. According to the embodiment of the invention, the battery cell assembly is characterized in that the battery cell assembly comprises a battery cell block which comprises a plurality of battery cells; and a pair of reinforcing plates coupled to both side surfaces of the cell block to support both side surfaces of the cell block, and including protrusions formed on outer surfaces thereof. The reinforcing plate includes: a first reinforcing plate coupled to one side of the cell block; and a second reinforcing plate coupled to the other side of the cell block, in which an outer surface of the first reinforcing plate and an outer surface of the second reinforcing plate have shapes that engage together. Furthermore, the battery pack according to the present invention is characterized by comprising: a cell assembly; and a pack case including a housing portion in which the cell assemblies are housed, in which the cell assemblies include a pair of reinforcing plates coupled to both sides to support the side surfaces, and a pair of cell assemblies housed in the housing portion to be adjacent to each other are coupled so that the first reinforcing plate and the second reinforcing plate combine to form a single auxiliary partition wall.

Description

Technical Field

[0001] The present disclosure relates to a battery cell assembly and a battery pack including the same. More particularly, the present disclosure relates to a battery cell assembly having a reinforcing plate supporting each side on both sides and a battery pack accommodating the same.

[0002] CROSS-REFERENCE TO RELATED APPLICATIONS

[0003] This application claims priority to Korean Patent Application No. 10-2023-0049575, filed on April 14, 2023, which is incorporated herein by reference in its entirety. Background Art

[0004] 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, depending on 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 be changed according to the required output voltage or charge / discharge capacity.

[0005] 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.

[0006] Figure 1 1 illustrates one form of a conventional battery cell assembly 10. The conventional battery cell assembly 10 includes a battery cell block 11 in which a plurality of battery cells are stacked in one direction as shown in the figure, and end plates 12 are coupled to the front and rear of the battery cell assembly 10, respectively.

[0007] In a battery pack, you can hold Figure 1 A plurality of battery cell assemblies 10 are shown.

[0008] In addition, the battery cell assembly 10 included in the battery pack may cause problems during charging and discharging, one of which may be a swelling phenomenon. The swelling phenomenon is a phenomenon in which the battery cell swells due to gas generated inside the battery cell, etc. The swelling phenomenon may first occur in each battery cell accommodated in the battery cell assembly 10, and thus affect the entire battery cell assembly 10. In particular, the swelling phenomenon may occur in the entire battery cell assembly 10.

[0009] Therefore, there is a need for a new method capable of maximally suppressing the shape deformation of the battery cell assembly 10 even if a swelling phenomenon occurs in each battery cell assembly 10 stored in a battery pack case.

[0010] [Prior art literature]

[0011] Korean Patent Publication No. 10-2018-0113906 Summary of the invention

[0012] Technical issues

[0013] Therefore, the present invention aims to solve the above-mentioned problems and provide a structure capable of reinforcing the side surface of a battery cell assembly.

[0014] The present disclosure is also intended to suppress the expansion phenomenon of the battery cell assembly stored in the battery pack case.

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

[0016] Technical Solution

[0017] The present invention provides a battery cell assembly, which includes: a battery cell block, which includes a plurality of battery cells; a pair of reinforcing plates, which are connected to both sides of the battery cell block to support the two sides of the battery cell block and include protrusions on the outer surface, wherein the reinforcing plates include a first reinforcing plate connected to one side of the battery cell block; and a second reinforcing plate connected to the other side of the battery cell block, and the outer surface of the first reinforcing plate and the outer surface of the second reinforcing plate have a shape that is engaged with each other.

[0018] The first reinforcing plate may include a protrusion in a lower portion of an outer side surface and include an upper step portion in an upper portion of the protrusion, and the second reinforcing plate may include a protrusion in an upper portion of the outer side surface and include a lower step portion in a lower portion of the protrusion.

[0019] The first reinforcement plate may include a horizontal insertion rod in an upper portion of the outer side surface, and the second reinforcement plate may include a horizontal insertion hole in an upper portion of the outer side surface, and the horizontal insertion hole in the second reinforcement plate may be formed corresponding to the horizontal insertion rod of the first reinforcement plate so that the horizontal insertion rod of the first reinforcement plate can be inserted.

[0020] The first reinforcement plate also includes a horizontal insertion hole in a lower portion of the outer side surface, and the second reinforcement plate also includes a horizontal insertion rod in a lower portion of the outer side surface, wherein the horizontal insertion hole of the first reinforcement plate is formed corresponding to the horizontal insertion rod of the second reinforcement plate so that the horizontal insertion rod of the second reinforcement plate can be inserted.

[0021] The first reinforcement plate also includes a horizontal insertion hole in a lower portion of the outer side surface, and the second reinforcement plate also includes a horizontal insertion rod in a lower portion of the outer side surface, wherein the horizontal insertion hole of the first reinforcement plate is formed corresponding to the horizontal insertion rod of the second reinforcement plate so that the horizontal insertion rod of the second reinforcement plate can be inserted.

[0022] The first reinforcing plate includes a vertical insertion rod in the upper step portion, and the second reinforcing plate includes a vertical insertion hole in the lower step portion, wherein the vertical insertion hole of the second reinforcing plate can be formed corresponding to the vertical insertion rod of the first reinforcing plate so that the vertical insertion rod of the first reinforcing plate can be inserted.

[0023] The first reinforcing plate includes a vertical insertion hole in the upper step portion, and the second reinforcing plate includes a vertical insertion rod in the lower step portion, wherein the vertical insertion hole of the first reinforcing plate can be formed corresponding to the vertical insertion rod of the second reinforcing plate so that the vertical insertion rod of the second reinforcing plate can be inserted.

[0024] The first reinforcing plate includes a vertical insertion hole in the upper step portion, and the second reinforcing plate includes a vertical insertion rod in the lower step portion, wherein the vertical insertion hole of the first reinforcing plate can be formed corresponding to the vertical insertion rod of the second reinforcing plate so that the vertical insertion rod of the second reinforcing plate can be inserted.

[0025] The protrusion may be formed to extend in a length direction of the battery cell assembly.

[0026] The protrusion may have a hollow structure.

[0027] The present invention provides a battery pack, which includes: a battery cell assembly; and a battery pack housing, which includes a accommodating portion in which the battery cell assembly is accommodated, wherein any one of a pair of battery cell assemblies accommodated adjacent to the accommodating portion, wherein a first reinforcing plate and a second reinforcing plate are connected to form an auxiliary partition wall.

[0028] The auxiliary partition wall may be coupled to the pack case by a coupling member penetrating the auxiliary partition wall and coupled to the bottom of the pack case.

[0029] The protrusion may include a perforated coupling hole through which the coupling member may penetrate, and coupling holes respectively included in the first reinforcement plate and the second reinforcement plate included in the auxiliary partition wall may be disposed at positions corresponding to each other.

[0030] The battery pack housing includes a base plate that supports the lower portion of the battery cell assembly.

[0031] The base plate includes a bottom groove corresponding to the position of the coupling hole included in the auxiliary partition wall and formed to allow the coupling member to be inserted, wherein the auxiliary partition wall can be coupled to the base plate by the coupling member penetrating the coupling hole and being inserted into the bottom groove.

[0032] The first reinforcing plate may include a protrusion in a lower portion of the outer side surface and include an upper step portion formed by the protrusion in an upper portion, and the second reinforcing plate may include a protrusion in an upper portion of the outer side surface and include a lower step portion formed by the protrusion in a lower portion.

[0033] The first reinforcement plate may include a horizontal insertion rod in an upper portion of an outer side surface, and the second reinforcement plate may include a horizontal insertion hole in an upper portion of the outer side surface, wherein the first reinforcement plate of any one battery cell assembly included in the auxiliary partition wall can be connected to the second reinforcement plate by inserting the horizontal insertion rod into the horizontal insertion hole included in the second reinforcement plate of another battery cell assembly.

[0034] The first reinforcement plate includes a vertical insertion rod in an upper step portion, and the second reinforcement plate includes a vertical insertion hole in a lower step portion, wherein the first reinforcement plate of any one battery cell assembly included in the auxiliary partition wall is connected to the second reinforcement plate by inserting the vertical insertion rod into the vertical insertion hole included in the second reinforcement plate of another battery cell assembly.

[0035] Beneficial Effects

[0036] According to the present disclosure, it is possible to effectively suppress the expansion phenomenon of the cell assembly accommodated in the battery pack case.

[0037] Furthermore, the present disclosure may improve the assembly efficiency of a battery pack case by eliminating a separate sidewall configuration that separates a cell assembly from the battery pack case. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A conventional battery cell assembly is illustrated.

[0039] Figure 2 is a diagram illustrating a battery pack case included in the battery pack of the present disclosure.

[0040] Figure 3 is a perspective view illustrating a battery cell assembly included in a battery pack according to a first embodiment of the present disclosure.

[0041] Figure 4 yes Figure 3 A plan view of the battery cell assembly.

[0042] Figure 5 is a perspective view illustrating a modified example of the battery cell assembly.

[0043] Figure 6 is a perspective view illustrating another modified example of the battery cell assembly.

[0044] Figure 7 is a perspective view illustrating still another modified example of the battery cell assembly.

[0045] Figure 8 is a perspective view illustrating a first reinforcement plate coupled to one side of a battery cell assembly included in a battery pack according to a first embodiment of the present disclosure.

[0046] Fig. 9 A second reinforcement plate coupled to the other side of a battery cell assembly included in a battery pack according to a first embodiment of the present disclosure is illustrated.

[0047] Fig.10 A pair of battery cell assemblies included in the battery pack according to the first embodiment of the present disclosure is illustrated.

[0048] Fig.11 Illustrated in Fig.10 A pair of reinforcing plates are arranged facing each other on the side surfaces of a pair of adjacently arranged battery cell assemblies.

[0049] Fig.12 An auxiliary partition wall included in the battery pack according to the first embodiment of the present disclosure is illustrated.

[0050] Fig.13 Illustrated is a battery pack housing coupled to Fig.12 Auxiliary partition wall.

[0051] Fig.14 The example of inserting the connecting member into Fig.13 The process of connecting holes of the auxiliary partition wall.

[0052] Fig.15 A battery cell assembly and a battery pack case included in a battery pack according to a first embodiment of the present disclosure are illustrated.

[0053] Fig.16 is a perspective view of a battery cell assembly included in a battery pack according to a second embodiment of the present disclosure.

[0054] Fig.17 yes Fig.16 A plan view of the battery cell assembly.

[0055] Fig.18 A pair of reinforcing plates that are adjacently disposed and included in a battery pack according to the second embodiment of the present disclosure is illustrated.

[0056] Fig.19 An auxiliary partition wall included in a battery pack according to a second embodiment of the present disclosure is illustrated.

[0057] Fig. 20 A pair of reinforcing plates included in the battery pack according to the third embodiment of the present disclosure is illustrated.

[0058] Fig.21A pair of reinforcing plates included in the battery pack according to the fourth embodiment of the present disclosure is illustrated.

[0059] Fig. 22 A pair of reinforcing plates included in a battery pack according to a fifth embodiment of the present disclosure is illustrated.

[0060] Fig.23 A pair of reinforcing plates included in a battery pack according to a sixth embodiment of the present disclosure is illustrated. DETAILED DESCRIPTION

[0061] Hereinafter, the present disclosure will be described in detail with reference to the accompanying drawings. Prior to this, the terms and words used in the present specification and claims should not be interpreted as limited to general terms or dictionary terms, and the meanings and concepts should be interpreted according to the technical concept of the present disclosure and based on the principle that the inventor appropriately defines the terminology concept in order to best interpret the present disclosure.

[0062] Therefore, it is to be understood that the embodiments described herein and the configurations shown in the drawings are merely the most preferred embodiments of the present disclosure and are not intended to represent all technical concepts of the present disclosure, and that various equivalents and modifications may exist that may be replaced upon submission.

[0063] Additionally, in describing the present disclosure, a detailed description of the configuration or function of the relevant disclosure is omitted if it is deemed that such a detailed description would obscure the subject matter of the present disclosure.

[0064] The present disclosure is illustrated in the embodiments to more fully explain the present disclosure to those of ordinary skill in the art, and therefore, for the sake of clarity, the shapes and sizes of the components in the drawings may be exaggerated, omitted or schematically shown. Therefore, the size or ratio of each component does not necessarily indicate its actual size or ratio.

[0065] The present disclosure relates to a battery pack accommodating a battery cell assembly 100 .

[0066] The battery pack of the embodiment of the present disclosure includes a cell assembly 100 including a cell block 110 including a plurality of cells, and a pack case 200 including a receiving portion A in which the cell assembly 100 is received.

[0067] According to the forms of the electrode assembly and the battery case, the battery cells can be divided into cylindrical battery cells, square battery cells and pouch-type battery cells.

[0068] A cylindrical battery cell is a battery cell in which an electrode assembly is wound in the form of a roll and inserted into a cylindrical battery case.

[0069] The square cell may be a stacked form in which an electrode assembly is stacked with electrodes and separators alternately stacked, and may be a stacked folded form in which electrodes and the like are provided on a separator in the form of a sheet folded at regular intervals.

[0070] A prismatic cell in which the electrode assembly is inserted into the battery cell in the form of a square box.

[0071] Pouch-type battery cells, in which the electrode assembly can be in a stacked form or in a stacked and folded form.

[0072] The pouch-type battery cell is one in which the electrode assembly is inserted into a pouch-type battery case. Therefore, the battery cell block may include any one of a cylindrical battery cell, a square battery cell, and a pouch-type battery cell.

[0073] The cell assembly 100 includes a cell block 110 , end plates 120 respectively coupled to the front and rear of the cell block 110 , and reinforcement plates 130 respectively coupled to both sides of the cell block 110 .

[0074] In some embodiments, the end plate 120 may further include a terminal electrically connected to the cell block 110. Each cell assembly 100 may be connected via a terminal.

[0075] In some embodiments, the battery cell assembly 100 may further include a module frame wrapped around the periphery of the battery cell block 110 so that each battery cell can be protected from external impact. In this case, the module frame may be configured to support or protect only a portion of the battery cell block 110, or may be configured to completely block the battery cell block 110 from contacting the outside by exposing all portions of the battery cell block 110.

[0076] In some embodiments, the module frame may further include a terminal electrically connected to the cell block 110. Each cell assembly 100 may be connected through the terminal.

[0077] The battery pack of the embodiment of the present disclosure may further include an upper cover coupled to the pack case 200 to cover an upper portion of each of the battery cell assemblies 100 accommodated in the pack case 200 .

[0078] Since the upper cover is covered by the related art, a detailed description thereof is omitted in the present disclosure.

[0079] Figure 2 2 is a diagram illustrating a battery pack housing included in the battery pack of the present disclosure. Figure 2 As shown, the battery pack housing 200 includes a base plate 210 .

[0080] The base plate 210 corresponds to the bottom of the pack case 200 and plays a role of supporting the lower portion of the battery cell assembly 100 disposed on the upper portion.

[0081] In the base plate 210 , a bottom groove 210 a may be formed to enable the coupling member B to be inserted and screwed thereto.

[0082] In some embodiments, the battery pack housing 200 may include a side wall 230 .

[0083] The sidewall 230 is vertically coupled along the periphery of the edge of the base plate 210 , and plays a role of wrapping and protecting the outer side surface of the battery cell assembly 100 located on the base plate 210 .

[0084] The battery pack case 200 includes a receiving portion A in which the battery cell assembly is received.

[0085] The battery cell assembly 100 is placed in the accommodation portion A.

[0086] According to some embodiments, the accommodation portion A may be an inner space of the battery pack case 200 surrounded by the sidewall 230 .

[0087] According to some embodiments, the battery pack case 200 may include a main partition wall 220 .

[0088] The main partition wall 220 is formed to extend across the substrate 210 and is vertically coupled to the central portion of the substrate 210. The main partition wall 220 plays a role in dividing and partitioning the space within the battery pack case 200 into roughly two areas, and may also play a role in protecting various conductors used in the battery pack case 200 by inserting them therein.

[0089] According to some embodiments, the accommodation portion A may be divided and formed by the main partition wall 220 and the side wall 230. In this case, the battery pack case 200 may include a pair of accommodation portions A on both sides of the main partition wall 220, wherein a plurality of battery cell assemblies 100 may be arranged and disposed side by side along the length direction d3 of the main partition wall.

[0090] The battery cell assemblies 100 disposed on both sides of the main partition wall 220 may be disposed symmetrically to each other with respect to the main partition wall 220 .

[0091] Figures 3 to 15 Concerning a battery pack according to a first embodiment of the present disclosure, Figures 16 to 19 relates to a battery pack according to a second embodiment of the present disclosure, and Figure 20 to Figure 23 The present invention relates to battery packs according to third to sixth embodiments of the present invention, respectively. Hereinafter, a battery pack of the present invention will be described in each embodiment with reference to the accompanying drawings.

[0092] For reference, directions such as front and rear, up and down, left and right, and right-left used in the following description to designate relative positions are provided to help understand the present disclosure, and unless otherwise defined, these directions are based on directions shown in the drawings.

[0093] In addition, the length direction of any configuration is referred to as a direction corresponding to the side having the longest length of the corresponding configuration shown in the drawing based on the horizontal direction, and the width direction of any configuration is referred to as a direction orthogonal to the length direction based on the horizontal direction.

[0094] (First Embodiment)

[0095] Figure 3 is a perspective view illustrating a battery cell assembly 100 included in a battery pack according to a first embodiment of the present disclosure, Figure 4 yes Figure 3 A plan view of a cell assembly 100, and Figures 5 to 7 is a perspective view illustrating a modified example of the battery cell assembly 100 .

[0096] Figure 3 and Figure 4 1 and 2 are a perspective view and a plan view respectively illustrating a battery cell assembly 100 including a pouch-type battery cell.

[0097] like Figure 3 As shown, the cell assembly 100 includes a cell block 110 having a plurality of cells stacked therein and end plates 120 respectively coupled to the front and rear of the cell block 110. In this case, the end plates 120 may further include terminals electrically connected to the cell block 110.

[0098] The cell assembly 100 includes a pair of reinforcing plates 130 coupled to both sides to support sides of the cell block 110 .

[0099] The reinforcing plate 130 may be coupled to the end plate 120. In this case, the reinforcing plate 130 may be coupled to the side of the end plate 120 by a separate screw or the like, or may be fixed to the end plate 120 by an adhesive.

[0100] The battery pack of the embodiment of the present disclosure is characterized in that a pair of battery cell assemblies 100 accommodated adjacent to each other in the pack case 200 are coupled with a reinforcing plate 130 included on one side to form one auxiliary partition wall 240 .

[0101] The reinforcing plate 130 forms a step and includes a protrusion 131 protruding from an outer side surface.

[0102] like Figure 3 As shown, the protrusion 131 protrudes from one side of the reinforcing plate 130 to form a step in the height direction d2 of the battery cell assembly and extends in the length direction d1 of the battery cell assembly. The protrusion 131 includes a coupling hole 131a perforated in a vertical direction so that the coupling member B can penetrate and has a hollow structure in which the rest is empty except for the coupling hole 131a.

[0103] The coupling member B may be, for example, a bolt having threads formed on an outer side surface.

[0104] The length of the coupling member B is preferably longer than the height of the reinforcing plate 130 .

[0105] according to Figure 3 The coupling holes 131 a may be formed in plurality along the length direction d1 of the battery cell assembly.

[0106] like Figure 4 As shown, the reinforcing plate 130 includes a first reinforcing plate 130 a coupled to one side of the cell block 110 and a second reinforcing plate 130 b coupled to the other side of the cell block 110 .

[0107] In other words, one battery cell assembly 100 is provided with a first reinforcing plate 130 a and a second reinforcing plate 130 b on both sides thereof.

[0108] The first reinforcing plate 130 a and the second reinforcing plate 130 b are different in the position of the protrusion 131 .

[0109] The battery cell assembly 100 may include battery cells in various forms other than the pouch type battery cell.

[0110] Figure 5 is a perspective view illustrating a battery cell assembly 100 including a cylindrical battery cell.

[0111] The battery cell assembly 100 includes a plurality of cylindrical battery cells such as Figure 5 The cell blocks 110 are arranged as shown, and the end plates 120 are respectively coupled to the front and rear portions of the cell blocks 110 .

[0112] The cell assembly 100 includes a pair of reinforcing plates 130 coupled to both sides of the cell block 110 for supporting the sides of the cell block 110 .

[0113] The end plate 120 is not necessarily limited to Figure 5 It is sufficient if the end plate 120 is shaped to support the front and rear of the cell block 110 .

[0114] The reinforcing plate 130 may be coupled to the end plate 120. In this case, the reinforcing plate 130 may be screwed to the side of the end plate 120 by a separate screw or the like, or may be fixed to the end plate 120 by an adhesive.

[0115] Figure 6 is a perspective view illustrating a battery cell assembly 100 including a square battery cell.

[0116] The battery cell assembly 100 includes a battery cell assembly as follows: Figure 6 The illustrated embodiment includes a cell block 110 having a plurality of square cells and end plates 120 respectively coupled to the front and rear portions of the cell blocks 110 .

[0117] The cell assembly 100 includes a pair of reinforcing plates 130 coupled to both sides of the cell block 110 to support the sides of the cell block 110 .

[0118] Here, each square cell is arranged such that the length direction is horizontal to the length direction of the end plate.

[0119] The end plate 120 is not necessarily limited to Figure 5 It is sufficient if the end plate 120 is shaped to support the front and rear of the cell block 110 .

[0120] The reinforcing plate 130 may be coupled to the end plate 120. In this case, the reinforcing plate 130 may be screwed to the side of the end plate 120 by a separate screw or the like, or may be fixed to the end plate 120 by an adhesive.

[0121] Figure 7 is a perspective view illustrating another type of battery cell assembly 100 including a square battery cell.

[0122] The battery cell assembly 100 includes a battery cell assembly as follows: Figure 7 The illustrated embodiment includes a cell block 110 having a plurality of square cells and end plates 120 respectively coupled to the front and rear portions of the cell blocks 110 .

[0123] The cell assembly 100 includes a pair of reinforcing plates 130 coupled to both sides of the cell block 110 to support the sides of the cell block 110 .

[0124] Here, each of the square-type battery cells is arranged such that a length direction is horizontal to a length direction of the reinforcing plate 130 .

[0125] The end plate 120 is not necessarily limited to Figure 7 It is sufficient if the end plate 120 is shaped to support the front and rear of the cell block 110 .

[0126] The reinforcing plate 130 may be coupled to the end plate 120. In this case, the reinforcing plate 130 may be screwed to the side of the end plate 120 by a separate screw or the like, or may be fixed to the end plate 120 by an adhesive.

[0127] A pair of reinforcing plates 130 included in one battery cell assembly 100 may have the shape of protrusions 131 engaged with each other, in other words, one reinforcing plate 130 is formed in an upper portion of the protrusion 131 and the other reinforcing plate 130 is formed in a lower portion of the protrusion 131 .

[0128] Figure 8 The first reinforcing plate 130a coupled to one side of the battery cell assembly 100 is illustrated. Figure 8, the first reinforcing plate 130a has a protrusion 131 formed on a lower portion of the reinforcing plate 130 and extending in a length direction d1 of the battery cell assembly.

[0129] The protrusion 131 protrudes to form a step at one side of the reinforcing plate 130, wherein the first reinforcing plate 130a includes an upper step 133a formed by an upper corner of the protrusion 131 formed on the lower portion. The upper step 133a is formed by extending along the protrusion 131 in the length direction d1 of the cell assembly.

[0130] The first reinforcing plate 130a includes a coupling hole 131a penetrating the protrusion 131 in a vertical direction. Specifically, the coupling hole 131a is formed on the upper step portion 133a.

[0131] In some embodiments, the plurality of coupling holes 131 a are formed at predetermined intervals spaced apart in a length direction of the battery cell assembly 100 .

[0132] Fig. 9 The second reinforcing plate 130b coupled to the other side of the battery cell assembly 100 is illustrated. Fig. 9 The second reinforcing plate 130 b has a protrusion 131 formed on an upper portion of the reinforcing plate 130 and extending along a length direction d1 of the cell assembly.

[0133] The second reinforcing plate 130b includes a lower step portion 133b formed by a lower corner of the protrusion 131 formed on the upper portion. The lower step portion 133b is formed by extending along the protrusion 131 in the length direction d1 of the cell assembly.

[0134] When a pair of battery cell assemblies 100 are coupled by the reinforcing plate 130 , a first reinforcing plate 130 a included on one side of one battery cell assembly 100 is coupled with a second reinforcing plate 130 b included on the other battery cell assembly 100 .

[0135] The protrusion 131 of the second reinforcing plate 130b is formed with a plurality of coupling holes 131a spaced at predetermined intervals and preferably formed at positions corresponding to those of the coupling holes 131a formed in the protrusion 131 of the first reinforcing plate 130a based on the length direction d1 of the cell assembly.

[0136] Fig.10 The connection process of a pair of adjacently arranged battery cell assemblies 100 is illustrated.

[0137] Here, a pair of reinforcing plates 130 formed on one side facing each other of each battery cell assembly 100 are coupled by overlapping the protrusions 131. Specifically, the first reinforcing plate 130a of one battery cell assembly 100 is coupled to the second reinforcing plate 130b of another adjacent battery cell assembly 100, wherein the protrusion 131 formed on the lower portion of the first reinforcing plate 130a and the protrusion 131 formed on the upper portion of the second reinforcing plate 130b are engaged with each other to form the auxiliary partition wall 240.

[0138] Fig.11 Illustrated in Fig.10 A pair of reinforcing plates are arranged facing each other on the side surfaces of a pair of adjacently arranged battery cell assemblies.

[0139] Reference Fig.11 , each protrusion 131 included in the first reinforcing plate 130a and the second reinforcing plate 130b is shaped to engage with each other. Specifically, one side of the first reinforcing plate 130a facing the protrusion 131 formed in the upper portion of the second reinforcing plate 130b is formed to correspond to the shape of the protrusion 131 of the second reinforcing plate 130b, and one side of the second reinforcing plate 130b facing the protrusion 131 formed in the lower portion of the first reinforcing plate 130a is formed to correspond to the shape of the protrusion 131 of the first reinforcing plate 130a. The first reinforcing plate 130a and the second reinforcing plate 130b may be coupled so that a gap does not occur between them due to their respective shapes. In this case, by coupling, the lower step 133b of the second reinforcing plate 130b contacts the upper step 133a of the first reinforcing plate 130a.

[0140] In addition, through the coupling, each coupling hole 131 a included in the first reinforcing plate 130 a coincides with each coupling hole 131 a included in the second reinforcing plate 130 b .

[0141] Fig.12 The auxiliary partition wall 240 having the first reinforcement plate 130 a and the second reinforcement plate 130 b coupled thereto is illustrated.

[0142] The auxiliary partition wall 240 of the embodiment of the present disclosure has the following features: Fig.12 The illustrated embodiment has the first reinforcing plate 130a and the second reinforcing plate 130b coupled without a gap, and positions of the respective coupling holes 131a of the first reinforcing plate 130a coincide with each other so that each coupling hole 131a of the first reinforcing plate 130a is connected to each coupling hole 131a of the second reinforcing plate 130b.

[0143] According to some embodiments, the auxiliary partition wall 240 may include a protruding coupling portion 132 at either end based on the length direction D1 of the battery cell assembly. Specifically, among the pair of reinforcing plates 130 forming the auxiliary partition wall 240, the second reinforcing plate 130b having the protruding portion 131 formed in the upper portion thereof includes a coupling portion 132 protruding from either end of the front end and the rear end.

[0144] The second reinforcing plate 130 b may further include an auxiliary coupling hole 132 a penetrating the coupling portion 132 in a vertical direction.

[0145] According to some embodiments, the auxiliary partition wall 240 may include a thread groove 240a formed for coupling by inserting a screw in a horizontal direction at either end based on the length direction d1 of the cell assembly. Specifically, the thread groove 240a is included in an end portion of the first reinforcing plate 130a.

[0146] The auxiliary partition wall 240 included in the battery pack of the embodiment of the present disclosure may be coupled to at least one of the main partition wall 220 , the side wall 230 , and the base plate 210 of the pack case 200 .

[0147] Fig.13 The example shown is coupled to the battery pack housing 200. Fig.12 (Although not shown for ease of understanding, the cell block 110 and the like are coupled to both sides of the auxiliary partition wall 240.)

[0148] Reference Fig.13 , the main partition wall 220 includes a coupling groove 220a into which the coupling portion 132 of the auxiliary partition wall 240 can be inserted, on one side in which the auxiliary partition wall 240 is provided.

[0149] The auxiliary partition wall 240 is mounted on the base plate 210 of the pack case 200 such that the coupling portion 132 is inserted into the coupling groove 220 a .

[0150] According to some embodiments, the main partition wall 220 may include an auxiliary coupling hole 132 a formed at the bottom of the coupling groove 220 a corresponding to the position of the auxiliary coupling hole 132 a of the inserted coupling part 132 .

[0151] The auxiliary partition wall 240 may be coupled and fixed to the main partition wall 220 by a screw penetrating the auxiliary coupling hole 132 a and inserted into the auxiliary coupling groove 220 a .

[0152] According to some embodiments, the side wall 230 may include a screw hole 230 a perforated at a position corresponding to the coupling groove 220 a of the main partition wall 220 to enable the coupling member B to penetrate in a horizontal direction.

[0153] In this case, the auxiliary partition wall 240 is installed so that the screw groove 240 a included in the end portion corresponds to the position of the screw hole 230 a .

[0154] The auxiliary partition wall 240 may be coupled and fixed to the side wall 230 by a screw penetrating through the screw hole 230 a and inserted into the screw groove 240 a .

[0155] The battery cell assembly 100 of the embodiment of the present disclosure is characterized in that it is connected to the battery pack housing 200 by a connecting member B that penetrates the auxiliary partition wall 240 in the vertical direction and is screwed into the bottom of the battery pack housing 200, and is supported on the side by the connecting member B that penetrates the auxiliary partition wall 240.

[0156] Fig.14 The example shows the insertion of the connecting member B into Fig.13 The process of the coupling hole 131a of the auxiliary partition wall 240.

[0157] Reference Fig.12 and Fig.14 , the base plate 210 of the pack case 200 corresponds to the position of the coupling hole 131 a of the auxiliary partition wall 240 , and includes a bottom groove 210 a formed for inserting and coupling the coupling member B.

[0158] The auxiliary partition wall 240 penetrates the coupling holes 131 a of the first and second reinforcing plates 130 a and 130 b and is coupled to the base plate 210 by a coupling member B inserted into the bottom groove 210 a .

[0159] The coupling member B inserted into the coupling hole 131 a of the auxiliary partition wall 240 preferably has a length longer than the height of the auxiliary partition wall 240 so as to penetrate the coupling hole 131 a and be inserted into the bottom groove 210 a of the base plate 210 .

[0160] Fig.15 The pack case 200 having the cell assembly 100 accommodated in the accommodation portion A is shown, and the cell assembly 100 mounted in the accommodation portion A is fixed to the pack case 200 by the auxiliary partition wall 240 and the coupling member B penetrating the auxiliary partition wall 240 .

[0161] The battery pack of the embodiment of the present disclosure can suppress deformation of the cell assembly 100 even if any one of the accommodated cell assemblies 100 can expand mainly by the auxiliary partition wall 240 formed by the coupling of the two reinforcing plates 130. In addition, the deformation of the cell assembly 100 can be secondarily suppressed by the plurality of coupling members B vertically penetrating the auxiliary partition wall 240 and coupled to the base plate 210.

[0162] (Second Embodiment)

[0163] The battery cell assembly 100 included in the battery pack according to the second embodiment of the present disclosure is different from the battery cell assembly 100 of the battery pack according to the first embodiment in that the protrusion 131 of the first reinforcing plate 130 does not have a hollow structure.

[0164] Therefore, the auxiliary partition wall 240 included in the battery pack of the second embodiment is characterized by improved strength.

[0165] Fig.16 is a perspective view of a battery cell assembly included in a battery pack according to a second embodiment of the present disclosure, and Fig.17 yes Fig.16 A plan view of the battery cell assembly.

[0166] like Fig.16 and Fig.17 As shown, the cell assembly 100 includes a cell block 110 having a plurality of cells stacked therein, and includes end plates 120 coupled to the front and rear of the cell block 110 , respectively.

[0167] The cell assembly 100 includes a pair of reinforcing plates 130 coupled to both sides to support sides of the cell block 110 .

[0168] The reinforcing plate 130 may be coupled to the end plate 120. In this case, the reinforcing plate 130 may be coupled to the side of the end plate 120 by a separate screw or the like, or may be fixed to the end plate 120 by an adhesive.

[0169] The battery pack of the embodiment of the present disclosure includes a pair of battery cell assemblies 100 accommodated adjacent to a pack case 200 , which are coupled by coupling a reinforcing plate 130 included on one side to form an auxiliary partition wall 240 .

[0170] The reinforcing plate 130 includes a protrusion 131 that forms a step and protrudes.

[0171] like Fig.16 As shown, the protrusion 131 protrudes from one side of the reinforcing plate 130 to form a step along a height direction d2 of the battery cell assembly, and extends along a length direction d1 of the battery cell assembly.

[0172] Reference Fig.16 The coupling holes 131 a may be formed in plurality along the length direction d1 of the battery cell assembly.

[0173] like Fig.17 As shown, the reinforcing plate 130 includes a first reinforcing plate 130 a coupled to one side of the battery cell assembly 100 and a second reinforcing plate 130 b coupled to the other side.

[0174] The first reinforcing plate 130 a and the second reinforcing plate 130 b are different in the position of the protrusion 131 .

[0175] The first reinforcing plate 130 a has a protrusion 131 formed in a lower portion of the reinforcing plate 130 , which extends in a length direction d1 of the cell assembly.

[0176] The protrusion 131 protrudes to form a step at one side of the reinforcing plate 130, and the first reinforcing plate 130a includes an upper step 133a formed by an upper corner of the protrusion 131 formed on the lower portion. The upper step 133a is formed by extending along the protrusion 131 in the length direction d1 of the cell assembly.

[0177] The protrusion 131 of the first reinforcing plate 130 a is formed of a plurality of coupling holes 131 a spaced apart at predetermined intervals.

[0178] The second reinforcing plate 130 b includes a protrusion 131 formed on an upper portion of the reinforcing plate 130 and extending in a length direction d1 of the cell assembly.

[0179] The second reinforcing plate 130b includes a lower step portion 133b formed by a lower corner of the protrusion 131 formed on the upper portion. The lower step portion 133b is formed by extending along the protrusion 131 in the length direction d1 of the cell assembly.

[0180] When a pair of battery cell assemblies 100 are coupled by the reinforcing plates 130 , a first reinforcing plate 130 a included on one side of any one battery cell assembly 100 is coupled to a second reinforcing plate 130 b included on one side of the other battery cell assembly 100 .

[0181] The protrusion 131 of the second reinforcing plate 130b is formed with a plurality of coupling holes 131a spaced apart at predetermined intervals, preferably at the same position as the coupling holes 131a formed in the protrusion 131 of the first reinforcing plate 130a based on the length direction d1 of the cell assembly.

[0182] In each of the coupled cell assemblies 100, a pair of reinforcing plates 130 formed on one side of each cell assembly 100 facing each other are coupled so that the protrusions 131 engage with each other. Specifically, the first reinforcing plate 130a of any one cell assembly 100 is coupled to the second reinforcing plate 130b of another adjacent cell assembly 100. In this case, the protrusion 131 formed on the lower portion of the first reinforcing plate 130a and the protrusion 131 formed on the upper portion of the second reinforcing plate 130b are positioned to engage with each other and coupled to form one auxiliary partition wall 240.

[0183] Fig.18 A pair of reinforcing plates 130 are illustrated as being disposed facing each other on the sides of a pair of adjacently disposed battery cell assemblies 100 .

[0184] Reference Fig.18, the first reinforcing plate 130a and the second reinforcing plate 130b are formed to correspond to the shape of the protrusion 131 formed on each of them. Specifically, one side of the first reinforcing plate 130a facing the protrusion 131 formed in the upper portion of the second reinforcing plate 130b is formed to correspond to the shape of the protrusion 131 of the second reinforcing plate 130b, and one side of the second reinforcing plate 130b facing the protrusion 131 formed in the lower portion of the first reinforcing plate 130a is formed to correspond to the shape of the protrusion 131 of the first reinforcing plate 130a.

[0185] The first reinforcing plate 130a and the second reinforcing plate 130b may be coupled so that a gap does not occur therebetween due to the corresponding shapes. In this case, the lower step portion 133b of the second reinforcing plate 130b contacts the upper step portion 133a of the first reinforcing plate 130a through the coupling.

[0186] Furthermore, through the coupling, each coupling hole 131 a included in the first reinforcing plate 130 a coincides with each coupling hole 131 a included in the second reinforcing plate 130 b .

[0187] Fig.19 The auxiliary partition wall 240 is illustrated in which the first reinforcement plate 130 a and the second reinforcement plate 130 b are coupled.

[0188] like Fig.19 As shown, the auxiliary partition wall 240 of the embodiment of the present disclosure has a gapless coupling of the first reinforcement plate 130 a and the second reinforcement plate 130 b .

[0189] Positions of the respective coupling holes 131 a coincide with each other such that each coupling hole 131 a of the first reinforcing plate 130 a is connected with each coupling hole 131 a of the second reinforcing plate 130 b.

[0190] according to Fig.19 The auxiliary partition wall 240 included in the battery pack of the illustrated second embodiment is coupled and fixed to the pack case 200 in the same manner as the auxiliary partition wall 240 included in the battery pack according to the first embodiment.

[0191] (Third Embodiment)

[0192] The battery cell assembly 100 included in the battery pack according to the third embodiment of the present disclosure includes a horizontal insertion rod 134 b protruding in a horizontal direction on the reinforcing plate 130 and a horizontal insertion hole 135 b formed in a horizontal direction on an outer side surface.

[0193] Fig. 20 A pair of reinforcing plates 130 included in the battery pack according to the third embodiment is illustrated.

[0194] The horizontal insertion rod 134b and the horizontal insertion hole 135b are formed as shown in FIG. Fig. 20 As shown, the reinforcing plate 130 is disposed on the outer side surface of the reinforcing plate 130 on both sides of the battery cell assembly 100 .

[0195] The horizontal insertion rod 134 b is formed at a position where the protrusion 131 is not formed in each reinforcing plate 130 .

[0196] The horizontal insertion rod 134 b is formed at a predetermined interval spaced apart from the protrusion 131 at a position of any one of the upper and lower portions of the protrusion 131 .

[0197] Specifically, when the protrusion 131 of the reinforcing plate 130 is formed at the upper portion, the horizontal insertion rod 134b is formed at the lower portion of the protrusion 131. Also, when the protrusion 131 of the reinforcing plate 130 is formed at the lower portion, the horizontal insertion rod 134b is formed at the upper portion of the protrusion 131.

[0198] The horizontal insertion hole 135b is formed at a position where the protrusion 131 is formed in each reinforcing plate 130. Specifically, each horizontal insertion hole 135b is formed at a position corresponding to the other horizontal insertion rod 134b facing the reinforcing plate 130.

[0199] The cell assembly included in the battery pack according to the third embodiment includes only one of the horizontal insertion rod 134 a and the horizontal insertion hole 135 b in each reinforcing plate 130 .

[0200] When the horizontal insertion rod 134a is formed in the first reinforcing plate 130a, the horizontal insertion hole 135b is formed in the second reinforcing plate 130b accordingly. On the other hand, when the horizontal insertion rod 134b is formed in the second reinforcing plate 130b, the horizontal insertion hole 135b is formed in the first reinforcing plate 130a accordingly.

[0201] In other words, in some embodiments, the battery cell assembly 100 of the embodiment of the present disclosure includes the horizontal insertion rod 134b in the upper portion of the outer side surface of the first reinforcing plate 130a and the horizontal insertion hole 135b in the upper portion of the outer side surface of the second reinforcing plate 130b.

[0202] In this case, the horizontal insertion holes 135b of the second reinforcing plate 130b are formed corresponding to the horizontal insertion rods 134b of the first reinforcing plate 130a so that the horizontal insertion rods 134b of the first reinforcing plate 130a can be inserted therein.

[0203] In another embodiment, the battery cell assembly 100 of the embodiment of the present disclosure includes a horizontal insertion hole in a lower portion of an outer side surface of a first reinforcing plate and a horizontal insertion rod in a lower portion of an outer side surface of a second reinforcing plate.

[0204] In this case, the horizontal insertion hole of the first reinforcing plate is formed corresponding to the horizontal insertion rod of the second reinforcing plate so that the horizontal insertion rod of the second reinforcing plate can be inserted therein.

[0205] The first reinforcing plate of any one of the battery cell assemblies 110 included in the auxiliary partition wall 240 is coupled to the second reinforcing plate by inserting the horizontal insertion rod into the horizontal insertion hole of the second reinforcing plate of the other battery cell assembly 110 .

[0206] Therefore, a pair of battery cell assemblies 100 may be first coupled and fixed by the horizontal insertion rods 134 b and the horizontal insertion holes 135 b .

[0207] The battery pack according to the third embodiment of the present disclosure may also be placed in the battery pack case at a time with each battery cell assembly 100 being coupled in advance through coupling of the horizontal insertion rods 134 b and the horizontal insertion holes 135 b of the reinforcing plate 130 .

[0208] In addition, the horizontal insertion rods 134b inserted into the horizontal insertion holes 135b restrict the horizontal movement or shaking of each reinforcing plate 130. Therefore, the reinforcing plate 130 and each battery cell assembly 100 including the reinforcing plate 130 can be stably fixed in the horizontal direction by the horizontal insertion rods 134b and the horizontal insertion holes 135b.

[0209] (Fourth Embodiment)

[0210] The battery cell assembly 100 included in the battery pack according to the fourth embodiment of the present disclosure includes a horizontal insertion rod 134 b protruding in a horizontal direction from a reinforcing plate 130 and a horizontal insertion hole 135 b formed in a horizontal direction on an outer side surface.

[0211] Fig.21 A pair of reinforcing plates included in the battery pack according to the fourth embodiment of the present disclosure is illustrated.

[0212] like Fig.21 As shown, the horizontal insertion rods 134 b and the horizontal insertion holes 135 b are respectively formed on the outer side surfaces of the reinforcing plates 130 disposed on both sides of the battery cell assembly 100 .

[0213] A pair of reinforcing plates 130 disposed on both sides of the battery cell assembly 100 include protrusions 131 in upper and lower portions, respectively.

[0214] The horizontal insertion rod 134b is formed at a position where the protrusion 131 is not formed in each reinforcing plate 130. Specifically, when the protrusion 131 of the reinforcing plate 130 is formed at the upper portion, the horizontal insertion rod 134b is formed at the lower portion of the protrusion 131. In addition, when the protrusion 131 of the reinforcing plate 130 is formed at the lower portion, the horizontal insertion rod 134b is formed at the upper portion of the protrusion 131.

[0215] The horizontal insertion hole 135b is formed at a position where the protrusion 131 is formed in each reinforcing plate 130. Specifically, each horizontal insertion hole 135b is formed at a position corresponding to the other horizontal insertion rod 134b facing the reinforcing plate 130.

[0216] The cell assembly included in the battery pack according to the fourth embodiment may be such that each reinforcing plate 130 includes both the horizontal insertion rod 134 a and the horizontal insertion hole 135 b .

[0217] Therefore, when a pair of adjacent cell assemblies 100 are coupled, the horizontal insertion rods 134b of each reinforcing plate 130 are inserted into the horizontal insertion holes 135b of the other reinforcing plate 130. Therefore, a pair of cell assemblies 100 can be coupled and fixed by the horizontal insertion rods 134b and the horizontal insertion holes 135b.

[0218] In other words, in some embodiments, the battery cell assembly 100 of the present disclosure includes a horizontal insertion rod 134b in the upper portion of the outer side surface of the first reinforcing plate 130a and a horizontal insertion hole 135b in the upper portion of the outer side surface of the second reinforcing plate 130b. In addition, the first reinforcing plate further includes a horizontal insertion hole in the lower portion of the outer side surface, and the second reinforcing plate further includes a horizontal insertion rod in the lower portion of the outer side surface.

[0219] The battery pack according to the fourth embodiment of the present disclosure may also be placed in the battery pack case at a time with each battery cell assembly 100 being coupled in advance through coupling of the horizontal insertion rods 134 b and the horizontal insertion holes 135 b of the reinforcing plate 130 .

[0220] In addition, the horizontal insertion rods 134b inserted into the horizontal insertion holes 135b restrict the horizontal movement or shaking of each reinforcing plate 130. Therefore, the reinforcing plate 130 and each battery cell assembly 100 including the reinforcing plate 130 can be stably fixed in the horizontal direction by the horizontal insertion rods 134b and the horizontal insertion holes 135b.

[0221] (Fifth Embodiment)

[0222] The battery cell assembly 100 included in the battery pack according to the fifth embodiment of the present disclosure includes a vertical insertion rod 134 a protruding in a vertical direction from a reinforcing plate 130 and a vertical insertion hole 135 a formed in a vertical direction.

[0223] Fig. 22 A pair of reinforcing plates included in a battery pack according to a fifth embodiment of the present disclosure is illustrated.

[0224] like Fig. 22As shown, vertical insertion rods 134 a and vertical insertion holes 135 a are respectively formed in the reinforcing plates 130 disposed on both sides of the battery cell assembly 100 .

[0225] Either one of the pair of reinforcing plates 130 disposed at both sides of the battery cell assembly 100 includes a vertical insertion rod 134 a , and the other includes a vertical insertion hole 135 a .

[0226] The vertical insertion rod 134a and the vertical insertion hole 135a are formed in any one of the upper and lower portions of the protrusion 131. Specifically, in the case of the reinforcing plate 130 in which the protrusion 131 is formed in the upper portion among the pair of reinforcing plates 130, the vertical insertion rod 134a is formed to extend downward from the lower portion of the protrusion 131 (in other words, from the lower step portion 133b).

[0227] In addition, in the case of another reinforcing plate 130 having a protrusion 131 formed in the lower portion, a vertical insertion hole 135a is formed in the upper portion of the protrusion 131, in other words, is formed from the upper step portion 133a at a position corresponding to the vertical insertion rod 134a of another battery cell assembly 100.

[0228] In other words, in some embodiments, the battery cell assembly 100 of the embodiment of the present disclosure includes the vertical insertion rod in the upper step portion of the first reinforcing plate and the vertical insertion hole in the lower portion of the second reinforcing plate.

[0229] In this case, the vertical insertion holes of the second reinforcing plate are formed corresponding to the vertical insertion rods of the first reinforcing plate so that the vertical insertion rods of the first reinforcing plate can be inserted therein.

[0230] In another embodiment, the battery cell assembly 100 of the embodiment of the present disclosure includes a vertical insertion hole in the upper step portion of the first reinforcing plate and a vertical insertion rod in the lower step portion of the second reinforcing plate.

[0231] In this case, the vertical insertion holes of the first reinforcing plate are formed corresponding to the vertical insertion rods of the second reinforcing plate so that the vertical insertion rods of the second reinforcing plate can be inserted therein.

[0232] The first reinforcing plate of any one battery cell assembly 100 included in the auxiliary partition wall 240 is coupled to the second reinforcing plate by inserting the vertical insertion rod into the vertical insertion hole included in the second reinforcing plate of the other battery cell assembly 100 .

[0233] Therefore, a pair of battery cell assemblies may be first coupled and fixed by the vertical insertion rods and the vertical insertion holes.

[0234] However, in the battery pack according to the fifth embodiment, unlike the battery packs of the third and fourth embodiments, the pair of battery cell assemblies 100 are coupled by moving in the top and bottom directions.

[0235] The battery pack according to the fifth embodiment of the present disclosure may also be placed in the battery pack case at a time in the case where each battery cell assembly 100 is preliminarily coupled by coupling of the vertical insertion rods and the vertical insertion holes of the reinforcing plate 130 .

[0236] In addition, the vertical insertion rods 134a inserted into the vertical insertion holes 135a restrict the horizontal movement or shaking of each reinforcing plate 130. Therefore, the reinforcing plate 130 and each battery cell assembly 100 including the reinforcing plate 130 can be stably fixed in the horizontal direction by the vertical insertion rods 134a and the vertical insertion holes 135a.

[0237] (Sixth Embodiment)

[0238] The battery cell assembly 100 included in the battery pack according to the sixth embodiment of the present disclosure includes a vertical insertion rod 134a protruding in a vertical direction from the reinforcing plate 130 and a vertical insertion hole 135a formed in a vertical direction. In particular, it is characterized in that both the vertical insertion rod 134a and the vertical insertion hole 135a are formed in any one reinforcing plate 130.

[0239] Fig.23 A pair of reinforcing plates included in a battery pack according to a sixth embodiment of the present disclosure is illustrated.

[0240] like Fig.23 As shown, the vertical insertion rods 134 a and the vertical insertion holes 135 a are respectively formed on the outer side surfaces of the reinforcing plates 130 disposed on both sides of the battery cell assembly 100 .

[0241] Each of the reinforcing plates 130 disposed on both sides of the battery cell assembly 100 includes a vertical insertion rod 134 a and a vertical insertion hole 135 a .

[0242] Among the pair of reinforcing plates 130, in the case of the reinforcing plate 130 having the protrusion 131 formed in the upper portion, the vertical insertion rod 134a and the vertical insertion hole 135a are formed in the lower portion (in other words, the lower step portion 133b) of the protrusion 131. On the other hand, in the case of the reinforcing plate 130 having the protrusion 131 formed in the lower portion, the vertical insertion rod 134a and the vertical insertion hole 135a are formed in the upper portion (i.e., the upper step portion 133a) of the protrusion 131.

[0243] In this case, each of the vertical insertion rods 134a and the vertical insertion holes 135a formed in any one reinforcing plate 130 corresponds in position to the vertical insertion holes 135a and the vertical insertion rods 134a formed in the other reinforcing plate 130 to be coupled.

[0244] Specifically, Fig.23 As shown, the vertical insertion rod 134a and the vertical insertion hole 135a formed toward the lower portion in the reinforcing plate 130 including the protrusion 131 in the upper portion correspond to the vertical insertion hole 135a and the vertical insertion rod 134a formed toward the upper portion in the reinforcing plate 130 including the protrusion 131 in the lower portion.

[0245] Therefore, the vertical insertion rod 134 a of each reinforcing plate 130 is inserted into the corresponding vertical insertion hole 135 a , thereby coupling a pair of reinforcing plates 130 .

[0246] In other words, in some embodiments, the battery cell assembly 100 of the embodiment of the present disclosure includes a vertical insertion rod in the upper step portion of the first reinforcing plate and a vertical insertion hole in the lower portion of the second reinforcing plate. Further, the first reinforcing plate also includes a vertical insertion hole in the upper step portion, and the second reinforcing plate also includes a vertical insertion rod in the lower step portion.

[0247] According to the battery pack of the sixth embodiment, as in the battery pack of the fifth embodiment, coupling is performed by moving a pair of battery cell assemblies 100 in the top and bottom directions.

[0248] In addition, the vertical insertion rods 134a inserted into the vertical insertion holes 135a restrict the horizontal movement or shaking of each reinforcing plate 130. Therefore, the reinforcing plate 130 and each battery cell assembly 100 including the reinforcing plate 130 can be stably fixed in the horizontal direction by the vertical insertion rods 134a and the vertical insertion holes 135a.

[0249] As described above, the present disclosure has been described in more detail with reference to the accompanying drawings and embodiments. Therefore, the configuration described herein or shown in the accompanying drawings is only one embodiment of the present disclosure and does not represent all the technical spirits of the present disclosure, so that it should be understood that when submitting this application, there may be various equivalents and modifications that can replace the embodiments and configurations.

[0250] [Description of Reference Signs]

[0251] 10: (Related technology) Battery cell components

[0252] 11: (Related Technology) Battery Cell Block

[0253] 12: (Related Technology) End Plate

[0254] 100: Battery cell components

[0255] 110: Battery cell

[0256] 120: End plate

[0257] 130: Reinforcement plate

[0258] 130a: First reinforcement plate

[0259] 130b: Second reinforcement plate

[0260] 131: protrusion

[0261] 131a: Connecting hole

[0262] 132: Connecting parts

[0263] 132a: Auxiliary connection hole

[0264] 133: Steps

[0265] 133a: Upper step

[0266] 133b: Lower step

[0267] 134a: Vertical insertion rod

[0268] 134b: Horizontal insertion rod

[0269] 135a: Vertical insertion hole

[0270] 135b: Horizontal insertion hole

[0271] 200: Battery pack housing

[0272] 210: Substrate

[0273] 210a: Bottom groove

[0274] 220: Main dividing wall

[0275] 220a: Connection groove

[0276] 230: Sidewall

[0277] 230a: Screw hole

[0278] 240: Auxiliary partition wall

[0279] 240a: thread groove

[0280] A: Accommodation

[0281] B: Connecting components

[0282] d1: length direction of battery cell assembly

[0283] d2: height direction of battery cell assembly

[0284] d3: Length direction of main partition wall

Claims

1. A battery cell assembly, comprising: A battery cell block, wherein the battery cell block includes a plurality of battery cells; a pair of reinforcing plates, the pair of reinforcing plates being coupled to both sides of the cell block to support both sides of the cell block, and the pair of reinforcing plates including protrusions on outer side surfaces, Wherein, the reinforcing plate comprises: a first reinforcing plate coupled to one side of the cell block; and a second reinforcing plate, the second reinforcing plate being coupled to the other side of the cell block, The outer side surface of the first reinforcing plate and the outer side surface of the second reinforcing plate have shapes that are engaged with each other.

2. The battery cell assembly according to claim 1, wherein: The first reinforcing plate includes a protruding portion in a lower portion of the outer side surface and includes an upper step portion in an upper portion of the protruding portion, and The second reinforcing plate includes a protruding portion in an upper portion of the outer side surface and includes a lower step portion in a lower portion of the protruding portion.

3. The battery cell assembly according to claim 2, wherein: The first reinforcing plate includes a horizontal insertion bar in an upper portion of the outer side surface, and the second reinforcing plate comprising a horizontal insertion hole in an upper portion of the outer side surface, Wherein, the horizontal insertion hole in the second reinforcing plate is formed corresponding to the horizontal insertion rod of the first reinforcing plate so that the horizontal insertion rod of the first reinforcing plate can be inserted.

4. The battery cell assembly according to claim 3, wherein: The first reinforcing plate further includes a horizontal insertion hole in a lower portion of the outer side surface, and The second reinforcing plate further includes a horizontal insertion rod in a lower portion of the outer side surface, The horizontal insertion hole of the first reinforcing plate is formed corresponding to the horizontal insertion rod of the second reinforcing plate so that the horizontal insertion rod of the second reinforcing plate can be inserted.

5. The battery cell assembly according to claim 2, wherein: The first reinforcing plate further includes a horizontal insertion hole in a lower portion of the outer side surface, and The second reinforcing plate further includes a horizontal insertion rod in a lower portion of the outer side surface, The horizontal insertion hole of the first reinforcing plate is formed corresponding to the horizontal insertion rod of the second reinforcing plate so that the horizontal insertion rod of the second reinforcing plate can be inserted.

6. The battery cell assembly according to claim 2, wherein: The first reinforcing plate includes a vertical insertion rod in the upper step portion, and The second reinforcing plate includes a vertical insertion hole in the lower step portion, The vertical insertion hole of the second reinforcing plate is formed corresponding to the vertical insertion rod of the first reinforcing plate so that the vertical insertion rod of the first reinforcing plate can be inserted.

7. The battery cell assembly according to claim 6, wherein: The first reinforcing plate includes a vertical insertion hole in the upper step portion, and The second reinforcing plate includes a vertical insertion rod in the lower step portion, The vertical insertion hole of the first reinforcing plate is formed corresponding to the vertical insertion rod of the second reinforcing plate so that the vertical insertion rod of the second reinforcing plate can be inserted.

8. The battery cell assembly according to claim 2, wherein: The first reinforcing plate includes a vertical insertion hole in the upper step portion, and The second reinforcing plate includes a vertical insertion rod in the lower step portion, The vertical insertion hole of the first reinforcing plate is formed corresponding to the vertical insertion rod of the second reinforcing plate so that the vertical insertion rod of the second reinforcing plate can be inserted.

9. The battery cell assembly according to claim 1, wherein: The protrusion is formed to extend along a length direction of the battery cell assembly.

10. The battery cell assembly according to claim 1, wherein: The protrusion has a hollow structure.

11. A battery pack, comprising: The battery cell assembly according to claim 1; as well as A battery pack housing, the battery pack housing comprising a housing for housing the battery cell assembly, Wherein, any one of a pair of battery cell assemblies accommodated adjacent to the accommodation portion is characterized in that the first reinforcing plate and the second reinforcing plate are connected to form an auxiliary partition wall.

12. The battery pack according to claim 11, wherein: The auxiliary partition wall is coupled to the pack case through a coupling member that penetrates the auxiliary partition wall and is coupled to a bottom of the pack case.

13. The battery pack according to claim 12, wherein: The protrusion includes a perforated coupling hole, the coupling member can penetrate the coupling hole, and The coupling holes included in the first reinforcement plate and the second reinforcement plate respectively included in the auxiliary partition wall are provided at positions corresponding to each other.

14. The battery pack according to claim 13, wherein: The battery pack housing includes a base plate supporting the lower portion of the battery cell assembly. wherein the base plate includes a bottom groove corresponding to a position of a coupling hole included in the auxiliary partition wall and formed so that the coupling member can be inserted, wherein the auxiliary partition wall is coupled to the base plate by the coupling member penetrating the coupling hole and inserted into the bottom groove.

15. The battery pack according to claim 11, wherein: The first reinforcing plate includes a protrusion in a lower portion of the outer side surface, and includes an upper step portion formed by the protrusion in an upper portion, and The second reinforcing plate includes the protruding portion in an upper portion of the outer side surface, and includes a lower step portion formed by the protruding portion in a lower portion.

16. The battery pack according to claim 15, the first reinforcing plate comprising a horizontal insertion bar in an upper portion of the outer side surface, and the second reinforcing plate comprising a horizontal insertion hole in an upper portion of the outer side surface, in, The first reinforcing plate of any one cell assembly included in the auxiliary partition wall is coupled to the second reinforcing plate by inserting the horizontal insertion rod into the horizontal insertion hole included in the second reinforcing plate of another cell assembly.

17. The battery pack according to claim 15, wherein: The first reinforcing plate includes a vertical insertion rod in the upper step portion, and The second reinforcing plate includes a vertical insertion hole in the lower step portion, Wherein, the first reinforcing plate of any one cell assembly included in the auxiliary partition wall is coupled to the second reinforcing plate by inserting the vertical insertion rod into the vertical insertion hole included in the second reinforcing plate of another cell assembly.

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