Battery pack assembly and battery rack assembly having the same

Abstract

A battery pack assembly and a battery rack assembly comprising the same are disclosed. The battery pack assembly may include a first battery module assembly and a second battery module assembly. The first battery module assembly may have a first electrode terminal. The second battery module assembly may have a second electrode terminal and may be disposed on the first battery module assembly along a stacking direction. The first electrode terminal and the second electrode terminal may be disposed to form an imaginary straight line along the stacking direction.

Description

Technology Field

[0001] The present invention relates to a battery pack assembly and a battery rack assembly equipped with the same. Background Technology

[0003] Generally, rechargeable batteries are widely used as energy sources for mobile devices. They are also attracting attention as power sources for electric vehicles (BEVs) and hybrid electric vehicles (HEVs). Furthermore, rechargeable batteries are applied to devices that store and supply energy in conjunction with the power grid, such as Battery Energy Storage Systems (BESS).

[0004] The basic unit of a secondary battery is the battery cell. While small mobile devices use one or two battery cells, medium to large devices such as automobiles and energy storage systems utilize battery module assemblies. A battery module assembly achieves high output and large capacity by electrically connecting multiple battery cells. Multiple battery module assemblies can be assembled and electrically connected to each other to form a battery pack assembly. Multiple battery pack assemblies can be mounted on a rack to create a battery rack assembly for an energy storage system. The problem to be solved

[0006] As determined by the inventors, components such as electrode terminals for electrical connections between battery module assemblies occupy a significant amount of space. The paths for electrical connections are also complex. Consequently, the power density of the battery pack assembly is low, and the electrical resistance is high.

[0007] One objective of the present invention, devised in consideration of these problems, is to provide a battery pack assembly and a battery rack assembly equipped with the same, which can prevent a decrease in the power density of the battery pack assembly due to a structure for electrical connection between battery module assemblies.

[0008] Another objective of the present invention is to provide a battery pack assembly and a battery rack assembly equipped with the same, which can minimize electrical resistance in electrical connections between battery module assemblies.

[0009] The problems that the present invention aims to solve are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0011] A battery pack assembly according to one aspect of the present invention for realizing the above-mentioned problem comprises: a first battery module assembly having a first electrode terminal; and a second battery module assembly having a second electrode terminal and disposed on the first battery module assembly along a stacking direction, wherein the first electrode terminal and the second electrode terminal are arranged to form a virtual straight line along a direction related to the stacking direction, and the second battery module assembly comprises a plurality of second battery cells; a second busbar pattern connected to the plurality of second battery cells; and a cover surrounding the plurality of second battery cells, wherein the second electrode terminal may include a second pattern terminal connected to the second busbar pattern; and a second exposed terminal installed to be exposed to the outside on the cover and detachably coupled to the second pattern terminal.

[0012] Here, the second exposed terminal and the second pattern terminal can be bolted.

[0013] Here, the second electrode terminal may further include a bridge terminal connecting the second pattern terminal and the second exposure terminal.

[0014] Here, the bridge terminal may include a first region facing the second pattern terminal; and a second region facing the second exposed terminal and tilted with respect to the first region.

[0015] Here, the cover may include a main plate having an opening formed therein corresponding to the second pattern terminal; and a mounting plate coupled to the main plate to correspond to the opening and having the second exposed terminal mounted thereon.

[0016] Here, the second pattern terminal may include a coupling surface facing the mounting plate.

[0017] Here, the mounting plate includes a side wall surrounding the second exposed terminal, and an open section may be formed in the side wall for arranging a module bus bar connected to the second exposed terminal.

[0018] Here, the open section may be positioned to correspond to the virtual straight line.

[0019] Here, the first battery module assembly includes a plurality of first battery cells; and a first busbar pattern connected to the plurality of first battery cells, and the first electrode terminal may include a first pattern terminal connected to the first busbar pattern; and a first exposed terminal mounted on the main plate and exposed to the outside, and coupled to the first pattern terminal.

[0020] Here, the first exposed terminal can be detachably coupled to the first pattern terminal.

[0021] A battery pack assembly according to another aspect of the present invention comprises: a first battery module assembly having a plurality of first battery cells, a first busbar pattern connected to the plurality of first battery cells, and a first electrode terminal connected to the first busbar pattern; and a second battery module assembly having a plurality of second battery cells, a second busbar pattern connected to the plurality of second battery cells, and a second electrode terminal connected to the second busbar pattern, and disposed on the first battery module assembly along a stacking direction, wherein the first electrode terminal and the second electrode terminal may be arranged to form a virtual straight line along the stacking direction.

[0022] Herein, a cover surrounding the plurality of first battery cells and the plurality of second battery cells is further included, and the second electrode terminal may include a second pattern terminal connected to the second busbar pattern; and a second exposed terminal installed to be exposed to the outside on the cover and detachably coupled to the second pattern terminal.

[0023] Here, the second electrode terminal may further include a bridge terminal connecting the second pattern terminal and the second exposure terminal.

[0024] Here, the cover may include a main plate having an opening formed therein corresponding to the second pattern terminal; and a mounting plate coupled to the main plate to correspond to the opening and having the second exposed terminal mounted thereon.

[0025] A battery rack assembly according to another aspect of the present invention comprises a rack; and a plurality of battery pack assemblies mounted on the rack along a stacking direction, wherein each of the plurality of battery pack assemblies comprises a first battery module assembly having a first electrode terminal; and a second battery module assembly having a second electrode terminal and disposed on the first battery module assembly along the stacking direction, wherein the first electrode terminal and the second electrode terminal may be arranged to form a virtual straight line along the stacking direction.

[0026] Here, the module busbar further includes connecting the second electrode terminal of one of the plurality of battery pack assemblies and the first electrode terminal of another of the plurality of battery pack assemblies, and the module busbar may include a flexible region.

[0027] Here, the flexible region may be formed by stacking and joining multiple metal plates.

[0028] Here, the second battery module assembly comprises a plurality of second battery cells; a second busbar pattern connected to the plurality of second battery cells; and a cover surrounding the plurality of second battery cells, and the second electrode terminal may include a second pattern terminal connected to the second busbar pattern; and a second exposed terminal installed to be exposed to the outside on the cover and detachably coupled to the second pattern terminal. Effects of the invention

[0030] According to the battery pack assembly and battery rack assembly equipped with the same configured as above according to the present invention, the second electrode terminal of the second battery module assembly stacked on the first battery module assembly includes a second pattern terminal connected to the second busbar pattern of the second battery module assembly and a second exposed terminal detachably coupled to the second pattern terminal, so that the second electrode terminal can be arranged so as not to be significantly misaligned with the first electrode terminal of the first battery module assembly. Accordingly, the arrangement of battery cells of each battery module assembly can also be generally identical to one another. This can minimize the reduction in power density caused by the formation of unnecessary space in the battery pack assembly.

[0031] Furthermore, since the first electrode terminal and the second electrode terminal are arranged to form a virtual straight line following a direction related to the stacking direction between the first battery module assembly and the second battery module assembly, electrical resistance in the electrical connection between the battery module assemblies can be minimized. Brief explanation of the drawing

[0033] FIG. 1 is a schematic exploded perspective view showing a battery pack assembly according to one embodiment of the present invention. FIG. 2 is an assembled perspective view showing a battery pack assembly excluding the front cover in FIG. 1. FIG. 3 is an exploded perspective view of the second electrode terminal and related configuration of FIG. 1. FIG. 4 is a perspective view showing the first electrode terminal and the second electrode terminal of FIG. 1. FIG. 5 is an exploded perspective view of a second electrode terminal and related configuration according to one variation of FIG. 3. FIG. 6 is a perspective view showing a battery rack assembly according to another embodiment of the present invention. Specific details for implementing the invention

[0034] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0035] The present invention is not limited to the embodiments disclosed below, but can be modified and implemented in various different forms. The embodiments provided are merely intended to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention. Accordingly, the present invention should be understood not to be limited to the embodiments disclosed below, but to include all modifications, equivalents, and substitutions that fall within the technical spirit and scope of the present invention, as well as substituting or adding the configuration of any one embodiment with the configuration of another embodiment.

[0036] The attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the attached drawings; rather, it should be understood that they include all modifications, equivalents, and substitutions that fall within the spirit and technical scope of the invention. In the drawings, components may be depicted as being exaggeratedly large or small in size or thickness for the sake of convenience of understanding, but the scope of protection of the invention should not be interpreted restrictively as a result thereof.

[0037] The terms used in this specification are used merely to describe specific embodiments or examples and are not intended to limit the invention. Furthermore, singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as "includes" or "consists of" in this specification are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in this specification. That is, terms such as "includes" or "consists of" in this specification should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0038] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0039] When it is stated that one component is "connected / communicated" or "connected" to another component, it should be understood that while it may be directly connected / communicated or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected / communicated" or "directly connected" to another component, it should be understood that there are no other components in between.

[0040] When it is stated that one component is "above" or "below" another component, it should be understood that it is not only placed directly above the other component, but that another component may also exist in between.

[0041] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0042] FIG. 1 is a schematic exploded perspective view showing a battery pack assembly according to one embodiment of the present invention.

[0043] Referring to the drawing, the battery pack assembly (100) may have a first battery module assembly (110), a second battery module assembly (120), a base plate (130), a side cover (140), a front cover (150), a top cover (160), and a module busbar (190). When a plurality of battery pack assemblies (100) are stacked and installed on a rack, and a control unit and a cooling unit, etc. are additionally installed on the rack, an energy storage system (BESS) can be completed. Alternatively, the battery pack assembly (100) may be used for purposes such as driving an electric motor of a vehicle.

[0044] A second battery module assembly (120) may be positioned on top of a first battery module assembly (110). The battery module assemblies (110 and 120) may be stacked along a stacking direction, for example, in this embodiment, a vertical direction (V). The vertical direction (V) may be a direction that perpendicularly penetrates the main surfaces of the battery module assemblies (110 and 120). The battery module assemblies (110 and 120) may be electrically connected to each other by a busbar or a cable. In an alternative embodiment, only one of the battery module assemblies (110 and 120) may be adopted, or three or more battery module assemblies may be adopted.

[0045] The battery module assemblies (110 and 120) may have battery cells (111, 121) and busbar patterns (113, 123). Since the detailed configurations of the battery module assemblies (110 and 120) are generally identical to one another, the following description will be based on the second battery module assembly (120).

[0046] (2) The battery cell (121) may be a cylindrical secondary battery in which a positive electrode, a negative electrode, an electrolyte, a separator, etc. are housed within an external metal case. The battery cell (121) may be arranged to be erected along the vertical direction (V). The battery cell (121) may be provided in multiple numbers, and the multiple battery cells (121) may be arranged in succession along the horizontal direction (H) relative to one another. The horizontal direction (H) may be a direction generally perpendicular to the vertical direction (V). The battery cell (121) is exemplified as cylindrical, but prismatic, pouch-type, etc. battery cells are not excluded.

[0047] (2) The busbar pattern (123) is configured to connect the terminals of a plurality of battery cells (121) to each other. The busbar pattern (123) may be made of a conductive material, for example, metal. The busbar pattern (123) may be connected to the positive terminal and the negative terminal of the battery cell (121). The busbar pattern (123) and the (1) busbar pattern (113) of the first battery module assembly (110) may be electrically connected to each other by a separate busbar.

[0048] The base plate (130), side cover (140), front cover (150), and top cover (160) may form a case or housing that accommodates the battery module assembly (110, 120). The case may also include a rear cover not shown in the drawing.

[0049] The base plate (130) may be located on the lower side of the first battery module assembly (110). The first battery module assembly (110) is coupled to the base plate (130), and the base plate (130) may support the battery module assembly (110, 120).

[0050] Side covers (140) can be placed on both sides of the battery module assembly (110, 120). Side covers (140) can face the sides of the battery module assembly (110, 120).

[0051] A front cover (150) may be located at the front of a battery module assembly (110, 120). The front cover (150) may be equipped with a sensing board for measuring the state of the battery cells (111, 121), such as voltage and temperature, and electrode terminals connected to busbar patterns (113, 123). For the installation of the sensing board, the front cover (150) may be made of an insulating material, such as plastic. The front cover (150) may have a main plate (151) and a mounting plate (155). If the main plate (151) has an area corresponding to the front of the battery module assembly (110, 120), the mounting plate (155) may be installed in one area of ​​the main plate (151).

[0052] The upper cover (160) may be located on the upper side of the second battery module assembly (120). The upper cover (160) may be made of a metal material together with the base plate (130) and the side cover (140). In that case, an insulating film may be placed between the upper cover (160) and the busbar pattern (123).

[0053] One of the module busbars (190) is configured to connect the electrode terminal (115, see FIG. 2) of the first battery module assembly (110) to the electrode terminal of the second battery module assembly of another battery pack assembly. The other of the module busbars (190) can also connect the electrode terminal (125, see FIG. 2) of the second battery module assembly (120) to the electrode terminal of the first battery module assembly of another battery pack assembly.

[0054] FIG. 2 is an assembled perspective view showing a battery pack assembly excluding the front cover in FIG. 1.

[0055] Referring to the drawing, the battery module assembly (110, 120) may further include electrode terminals (115, 125) and wires (117, 127). The electrode terminals (115, 125) may be electrically connected to the busbar pattern (113, 123) as previously described. The wires (117, 127) may connect the sensing substrate to the busbar pattern (113, 123) or connect the sensing substrate to a temperature sensor, etc.

[0056] The first electrode terminal (115) and the second electrode terminal (125) may be arranged to form a virtual straight line (L) following a direction related to the vertical direction (V). The arrangement direction of the virtual straight line (L) may coincide with the vertical direction (V) or may deviate slightly. The latter may be the case where the electrode terminals (115 and 125) are arranged to such an extent that the state in which the second electrode terminal (125) is assembled or prepared for assembly interferes with the assembly of the first electrode terminal (115) along the vertical direction (V). When projected along the vertical direction (V), at least a portion of the second electrode terminal (125) may be located within the projected area of ​​the first electrode terminal (115). Due to this arrangement relationship of the electrode terminals (115 and 125), the first battery cell (111) and the second battery cell (121) may be arranged generally identically to each other. By making the arrangement of the battery cells (111 and 121) identical, unnecessary waste of space can be minimized. Additionally, the module busbar (190) has a minimum length along the vertical direction (V), so that electrical resistance can be minimized.

[0057] The front cover (150) can be coupled to the side cover (140) and the top cover (160), etc. The rear cover can be coupled to the side cover (140) and the top cover (160), etc.

[0058] The base plate (130) and the side cover (140) are not directly joined, but can be joined through an intermediate member (170). The intermediate member (170) is joined to the base plate (130), and the side cover (140) can be joined to the intermediate member (170).

[0059] FIG. 3 is an exploded perspective view of the second electrode terminal and related components of FIG. 1. For convenience, the reference number for the second electrode terminal (125) is assigned as 200.

[0060] Referring to the drawing, the second electrode terminal (200) may include a second pattern terminal (210), a second exposed terminal (230), and a bridge terminal (250).

[0061] The second pattern terminal (210) can be connected to the second busbar pattern (123). In this embodiment, the second pattern terminal (210) is exemplified as being formed as a single member with the second busbar pattern (123), but they (123 and 210) may be manufactured as separate members and then combined with each other. The main surface of the second pattern terminal (210) becomes a coupling surface (215), and the coupling surface (215) may be arranged to face a mounting plate (155) or a front cover (150). The front cover (150) is a cover associated with the second electrode terminal (200) among the cases, and may be simply referred to as a cover below.

[0062] The second exposed terminal (230) may be installed on the cover (150) so as to be exposed to the outside. An exposed area (231), which is a part of the second exposed terminal (230), may be exposed to the outside of the mounting plate (155). The second exposed terminal (230) may be detachably coupled to the second pattern terminal (210).

[0063] The bridge terminal (250) can mediate the coupling between the second pattern terminal (210) and the second exposed terminal (230). The bridge terminal (250) may have a first region (251) facing the second pattern terminal (210), specifically the coupling surface (215). The bridge terminal (250) may also have a second region (255) facing the coupling region (235) of the second exposed terminal (230). The first region (251) and the second region (255) may be arranged at an angle relative to each other. In this embodiment, the regions (251 and 255) may form an angle of approximately 90° relative to each other.

[0064] The connection of the first region (251) of the bridge terminal (250) to the connection surface (215) of the second pattern terminal (210), and the connection of the second region (255) of the bridge terminal (250) to the connection region (235) of the second exposed terminal (230) can be achieved by bolting.

[0065] A mounting plate (155) may have a mounting surface (156a) formed thereon on which the exposed area (231) of the second exposed terminal (230) is seated. An insertion hole (156b) may be formed in one side area of ​​the mounting surface (156a). The insertion hole (156b) may be formed in a size through which the coupling area (235) of the second exposed terminal (230) passes. The mounting surface (156a) may be surrounded by a side wall (157). The side wall (157) protrudes from the mounting plate (155) and may surround three corners of the mounting surface (156a). In the section corresponding to one corner of the mounting surface (156a) {open section (157a)}, the side wall (157) is not formed, so that the module bus bar (190, see FIG. 1) can be extended through the section (157a). The open section (157a) can be positioned to correspond to the straight line (L).

[0066] An opening (152) corresponding to a mounting plate (155) may be formed in the main plate (151) of the cover (150). In order to allow a work tool to access the coupling surface (215) while the main plate (151) is coupled to the side cover (140, see FIG. 1), the opening (152) may be positioned to correspond to the coupling surface (215). As the mounting plate (155) is coupled to the main plate (151), the opening (152) may be closed.

[0067] According to this configuration, with the main plate (151) coupled to the side cover (140), the operator can bolt the bridge terminal (250) to the second pattern terminal (210). The bridge terminal (250) and the work tool can approach the second pattern terminal (210) along the horizontal direction (H) through the opening (152).

[0068] After the bridge terminal (250) is coupled to the second pattern terminal (210), the mounting plate (155) can be coupled to the main plate (151). The second exposed terminal (230) can be mounted on the mounting plate (155). With the coupling area (235) of the second exposed terminal (230) and the second area (255) of the bridge terminal (250) overlapping, the operator can bolt the areas (235 and 255) by bringing a work tool toward the coupling area (235) and the second area (255) in a vertical direction (V).

[0069] The assembly work for the second electrode terminal (200) can be performed after the assembly work for the first electrode terminal (115, see FIG. 2). Since the bridge terminal (250) is coupled to the second pattern terminal (210) through the opening (152), the work of coupling the bridge terminal (250) to the second pattern terminal (210) does not interfere with the work of assembling the first electrode terminal (115) along the vertical direction (V). In addition, the work of coupling the bridge terminal (250) to the second pattern terminal (210) can be performed without problems even when the main plate (151) is coupled to the side cover (140).

[0070] FIG. 4 is a perspective view showing the first electrode terminal and the second electrode terminal of FIG. 1. For convenience, the reference number for the first electrode terminal (115) is assigned as 300.

[0071] Referring to the drawing, the first electrode terminal (300) may have a first pattern terminal (310), a first exposure terminal (330), and a bridge terminal (350), similar to the second electrode terminal (200).

[0072] The first pattern terminal (310) can be connected to the first busbar pattern (113).

[0073] The first exposed terminal (330) can be mounted on a cover (150), specifically a main plate (151, see FIG. 1 above), and exposed to the outside.

[0074] The bridge terminal (350) can connect the first exposed terminal (330) and the first pattern terminal (310).

[0075] In an alternative embodiment, the bridge terminal (350) may be formed as a single member with the first pattern terminal (310). With the main plate (151) coupled to the side cover (140), the operator can bolt the first exposed terminal (330) to the bridge terminal (350). To do this, the operator can bring a work tool to the terminals (330 and 350) along the vertical direction (V).

[0076] FIG. 5 is an exploded perspective view of a second electrode terminal and related configuration according to one variation of FIG. 3.

[0077] Referring to the drawing, the second electrode terminal (200') is generally the same as the second electrode terminal (200) according to the preceding embodiment, but differs in that the second exposed terminal (230') is directly coupled to the second pattern terminal (210).

[0078] The second exposed terminal (230') may be in the form where the second exposed terminal (230) and the bridge terminal (250) of the preceding embodiment are integrated. The second exposed terminal (230') may have an exposed area (231) corresponding to the seating surface (156a) and a coupling area (235') corresponding to the coupling surface (215). The exposed area (231) and the coupling area (235') may extend in opposite directions to each other, and the areas (231 and 235') may be connected by a connecting area (237).

[0079] In order to bolt the second exposed terminal (230') to the second pattern terminal (210), the mounting plate (155') may be divided into a seating area (155a) and a working area (155b). A seating surface (156a) and a side wall (157) may be formed in the seating area (155a). An open section (157a) may be formed in the upper part of the seating area (155a). A part of the working area (155b) may be spaced apart from the seating area (155a) to form an insertion hole (156b). The seating area (155a) and the working area (155b) may be bolted independently to the main plate (151).

[0080] According to this configuration, with the main plate (151) coupled to the side cover (140, see FIG. 1 above) and the seating area (155a) coupled to the main plate (151), the operator can bolt the second exposed terminal (230') to the second pattern terminal (210). The second exposed terminal (230') and the work tool can access the second pattern terminal (210) along the horizontal direction (H) through the area corresponding to the work area (155b) among the openings (152). The operator can then coupled the work area (155b) to the main plate (151).

[0081] In an alternative embodiment, the seating area (155a) may be formed to be integral with the main plate (151). In that case, only the working area (155b) may be formed as a separate member from the main plate (151) and coupled to the main plate (151).

[0082] FIG. 6 is a perspective view showing a battery rack assembly according to another embodiment of the present invention.

[0083] Referring to the drawing, the battery rack assembly may have a rack (400) and a plurality of battery pack assemblies (100, 100').

[0084] The rack (400) can generally be a frame that creates a cuboid-shaped space. The frame can create multiple layers of shelves.

[0085] Battery pack assemblies (100 and 100') can be stacked along the vertical direction (V) while supported on the shelf.

[0086] The second electrode terminal of the battery pack assembly (100) can be connected to the first electrode terminal of another battery pack assembly (100') by a module busbar (190). The module busbar (190) can extend along the vertical direction (V) or along a direction slightly inclined with respect to the vertical direction (V).

[0087] Another module busbar (190') can connect the second electrode terminal of the highest-positioned battery pack assembly (100') to the first electrode terminal of the lowest-positioned battery pack assembly. Due to a large number of battery pack assemblies, the distance between the second electrode terminal and the first electrode terminal may differ from the design value. To absorb such manufacturing errors, the module busbar (190') may have a flexible area (195').

[0088] The flexible region (195') may be located between a pair of rigid regions (191' and 193'). The flexible region (195') may be formed by stacking multiple metal plates and joining them together. The flexible region (195') can absorb the error while bending. Explanation of the symbols

[0090] 100,100': Battery pack assembly 110: First battery module assembly 120: Second battery module assembly 150: Front cover 200: Second electrode terminal 210: 2nd pattern terminal 230: Second exposed terminal 250: Bridge terminal 300: First electrode terminal 310: 1st pattern terminal 330: First exposed terminal 350: Bridge terminal

Claims

Claim 1 A battery pack assembly comprising: a first battery module assembly having a first electrode terminal; and a second battery module assembly having a second electrode terminal and disposed on the first battery module assembly along a stacking direction, wherein the first electrode terminal and the second electrode terminal are arranged to form a virtual straight line along a direction related to the stacking direction, and the second battery module assembly comprises a plurality of second battery cells; a second busbar pattern connected to the plurality of second battery cells; and a cover surrounding the plurality of second battery cells, wherein the second electrode terminal comprises a second pattern terminal connected to the second busbar pattern; and a second exposed terminal installed to be exposed to the outside on the cover and detachably coupled to the second pattern terminal. Claim 2 A battery pack assembly wherein, in paragraph 1, the second exposed terminal and the second pattern terminal are bolted. Claim 3 A battery pack assembly according to claim 1, wherein the second electrode terminal further comprises a bridge terminal connecting the second pattern terminal and the second exposed terminal. Claim 4 In paragraph 3, the bridge terminal comprises: a first region facing the second pattern terminal; and a second region facing the second exposed terminal and inclined with respect to the first region, forming a battery pack assembly. Claim 5 A battery pack assembly according to claim 1, wherein the cover comprises: a main plate having an opening formed therein corresponding to the second pattern terminal; and a mounting plate coupled to the main plate to correspond to the opening and having the second exposed terminal mounted thereon. Claim 6 In paragraph 5, the battery pack assembly, wherein the second pattern terminal comprises a coupling surface facing the mounting plate. Claim 7 A battery pack assembly according to claim 5, wherein the mounting plate includes a side wall surrounding the second exposed terminal, and the side wall has an open section formed therein for arranging a module bus bar connected to the second exposed terminal. Claim 8 In claim 7, the above-mentioned open section is a battery pack assembly positioned to correspond to the above-mentioned imaginary straight line. Claim 9 In claim 5, the first battery module assembly comprises a plurality of first battery cells; and a first busbar pattern connected to the plurality of first battery cells, and the first electrode terminal comprises a first pattern terminal connected to the first busbar pattern; and a first exposed terminal mounted on the main plate and exposed to the outside, and coupled to the first pattern terminal, wherein the battery pack assembly Claim 10 In claim 9, the battery pack assembly wherein the first exposed terminal is detachably coupled to the first pattern terminal. Claim 11 A battery pack assembly comprising: a first battery module assembly having a plurality of first battery cells, a first busbar pattern connected to the plurality of first battery cells, and a first electrode terminal connected to the first busbar pattern; and a second battery module assembly having a plurality of second battery cells, a second busbar pattern connected to the plurality of second battery cells, and a second electrode terminal connected to the second busbar pattern, and disposed on the first battery module assembly along a stacking direction, wherein the first electrode terminal and the second electrode terminal are arranged to form a virtual straight line along the stacking direction. Claim 12 A battery pack assembly according to claim 11, further comprising a cover surrounding the plurality of first battery cells and the plurality of second battery cells, wherein the second electrode terminal comprises: a second pattern terminal connected to the second busbar pattern; and a second exposed terminal installed to be exposed to the outside on the cover and detachably coupled to the second pattern terminal. Claim 13 A battery pack assembly according to claim 12, wherein the second electrode terminal further comprises a bridge terminal connecting the second pattern terminal and the second exposure terminal. Claim 14 A battery pack assembly according to claim 12, wherein the cover comprises: a main plate having an opening formed therein corresponding to the second pattern terminal; and a mounting plate coupled to the main plate to correspond to the opening and having the second exposed terminal mounted thereon. Claim 15 A battery rack assembly comprising: a rack; and a plurality of battery pack assemblies mounted on the rack along a stacking direction, wherein each of the plurality of battery pack assemblies comprises: a first battery module assembly having a first electrode terminal; and a second battery module assembly having a second electrode terminal and disposed on the first battery module assembly along the stacking direction, wherein the first electrode terminal and the second electrode terminal are arranged to form a virtual straight line along the stacking direction. Claim 16 In claim 15, the battery rack assembly further comprises a module busbar connecting the second electrode terminal of one of the plurality of battery pack assemblies and the first electrode terminal of another of the plurality of battery pack assemblies, wherein the module busbar includes a flexible region. Claim 17 In claim 16, the flexible region is a battery rack assembly in which a plurality of metal plates are laminated and bonded. Claim 18 In claim 15, the second battery module assembly comprises a plurality of second battery cells; a second busbar pattern connected to the plurality of second battery cells; and a cover surrounding the plurality of second battery cells, wherein the second electrode terminal comprises a second pattern terminal connected to the second busbar pattern; and a second exposed terminal installed to be exposed to the outside on the cover and detachably coupled to the second pattern terminal, thereby forming a battery rack assembly.

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