KR101080123B1 - Battery Module Assembly - Google Patents

Abstract

The present invention relates to a battery module assembly, in which a plurality of rectangular battery modules in which a plurality of battery cells or unit modules are connected in series is stacked two or more in its width direction (vertical direction) and height direction (lateral direction). And a hexahedron structure (hexahedral stack) as a whole, the outer peripheral edges of the hexahedral stack are fixed by a frame member, and the battery module assembly is connected to an external device in a frame member that fixes the corners of one side of the hexahedral stack. It provides a battery module assembly having a structure in which the mounting frame is formed on each end of the coupling portion for mounting the.

Description

Battery Module Assembly {Battery Module Assembly}

The present invention relates to a battery module assembly, and more particularly, a plurality of rectangular battery modules in which a plurality of battery cells or unit modules are connected in series has two widthwise (longitudinal) and high (lateral) directions. It is laminated in pieces or more to form a hexahedral structure (hexahedral laminate) as a whole, the outer peripheral edges of the hexahedral laminate is fixed by a frame member, the frame member for fixing the corners of one side of the hexahedral laminate The present invention relates to a battery module assembly comprising a mounting frame having coupling portions for mounting the battery module assembly to an external device, respectively, formed at both ends thereof.

BACKGROUND ART [0002] In recent years, rechargeable secondary batteries have been widely used as energy sources for wireless mobile devices. Secondary batteries are also attracting attention as a power source for electric vehicles (EVs) and hybrid electric vehicles (HEVs), which are proposed as a way to solve air pollution in conventional gasoline and diesel vehicles that use fossil fuels. .

In a small mobile device, one or two or more battery cells are used per device, while a middle- or large-sized battery module such as an automobile is used as a middle- or large-sized battery module in which a plurality of battery cells are electrically connected due to the necessity of a large-

Since the medium-large battery module is preferably manufactured in a small size and weight, the rectangular battery, the pouch-type battery, etc., which can be charged with high integration and have a small weight to capacity, are mainly used as battery cells of the medium-large battery module. In particular, a pouch-type battery using an aluminum laminate sheet or the like as an exterior member has attracted much attention in recent years due to its advantages such as low weight, low manufacturing cost, and easy deformation.

In order for the medium-large battery module to provide the output and capacity required by a given device or device, it is necessary to electrically connect a plurality of battery cells in series and maintain a stable structure against external force.

Therefore, in the case of constructing a medium-large battery module using a plurality of battery cells, since a large number of members are generally required for their mechanical fastening and electrical connection, the process of assembling these members is very complicated. Moreover, space is required for joining, welding, soldering, etc. a plurality of members for mechanical fastening and electrical connection, thereby increasing the size of the entire system. This increase in size is undesirable in view of the space limitations of the apparatus or device in which the medium-large battery module is mounted. Furthermore, in order to be efficiently mounted in a limited interior space such as a vehicle, a medium to large battery module having a more compact structure is required.

In this regard, Japanese Laid-Open Patent Publication No. 2005-050616 discloses a bottom rack in which two battery packs are each placed in order to increase safety against external force due to a collision of a vehicle in a medium-large battery module mounted in a large vehicle such as a bus ( a rack and an upper rack, the lower rack stand member and the upper rack mount member are suspended in a body of the vehicle by a lower rack suspension member and an upper rack suspension member. Disclosed is a medium-large battery module having a high rigidity of a mount member and a low rigidity of the suspension member.

However, the medium-large battery module of the above technology can improve safety in a vehicle crash by using a plurality of racks, but it is necessary to configure two complex racks to mount a total of four battery packs, thereby increasing volume and weight. In the construction of a battery module having a compact structure, there is a problem that it is difficult to apply from a technical point of view. That is, the technique has a disadvantage that the volume and weight are very large because the outer shape must be large in order to give high mechanical rigidity.

On the other hand, since the battery module assembly is a structure in which a plurality of battery cells are combined, when some battery cells are overvoltage, overcurrent, and overheating, safety and operation efficiency of the battery module are greatly detrimental, and thus a means for detecting and controlling them is required. Therefore, by connecting a voltage sensor, a temperature sensor, and the like to the battery cells to check and control the operating state in real time or at regular intervals, the installation or connection of such detection means and their control means greatly facilitate the assembly of the battery module. It is cumbersome and there is a risk of short circuit due to the large number of wirings for it.

Therefore, as described above, there is a high need for a battery module assembly which is more compact, has excellent structural stability, and is capable of mounting a detection means with a simple structure.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems of the prior art and the technical problems required from the past.

Specifically, an object of the present invention has a compact structure that can be stably mounted in a minimum space in a limited space such as a vehicle, and can be assembled in a simple manner with a small number of members for mechanical fastening and electrical connection. It is to provide a battery module assembly excellent in structural stability against impact.

The battery module assembly according to the present invention for achieving this object, a plurality of rectangular battery modules in which a plurality of battery cells or unit modules are connected in series in its width direction (vertical direction) and height direction (lateral direction) Two or more stacked by each of them to form a hexahedral structure (hexahedral stack) as a whole, the outer edges of the hexahedral stack is fixed by a frame member, the frame member for fixing the corners of one side of the hexahedral stack It is configured that the mounting frame is formed on each end of the coupling portion for mounting the battery module assembly to the external device is installed.

That is, in the battery module assembly of the present invention, a plurality of rectangular battery modules are laminated in a longitudinal direction and a lateral direction to form a hexahedral stack, and the hexahedral stack is fixed by a frame member, thereby having a compact and stable structure as a whole and a large number. Mechanical fastening and electrical connection can be made without the use of members.

In addition, the frame member for fixing the corners of one side of the six-sided stack is provided with a mounting frame formed with a coupling portion for connecting the external device, so that the battery module assembly can be mounted stably and easily on an external device such as a vehicle. can do.

As one preferred embodiment, the engaging portion of the mounting frame may be composed of two plate-like members that are bent to protrude outward with each end coupled to the frame member.

That is, the two mounting frames have four coupling parts protruding outwards mechanically coupled to the external device while the main body is stably coupled to the battery module assembly. It can be firmly coupled to the mounting position of the device.

In the present invention, the plurality of rectangular battery modules constituting the hexahedral stack, as described above, has a structure in which a plurality of battery cells or unit modules are connected in series. For example, the rectangular battery module is formed by stacking two or more plate-shaped battery cells. Preferably, the two rectangular battery modules in the transverse direction are arranged to face each other, one or more rectangular battery modules are arranged in the longitudinal direction with respect to each rectangular battery module to form a hexahedral stack structure. Can be.

The rectangular battery module may have a rectangular parallelepiped shape having a large width to height, and the six-sided laminate may have a generally rectangular parallelepiped shape. Therefore, a very compact and stable structure can be made as a whole, and the size limitation problem can be solved in mounting the battery module assembly in a predetermined portion such as an interior space of the vehicle.

The structure of the unit module may be configured in various configurations, a preferred example will be described below.

The unit module has a structure in which plate-shaped battery cells having electrode terminals formed at upper and lower ends thereof are connected to each other in series, and two or more battery cells having a stacked structure in which the connecting portions of the electrode terminals are bent, and the Excluding the electrode terminal portion is configured to include a high-strength cell cover coupled to surround the outer surface of the battery cells.

The plate-shaped battery cell is a secondary battery cell having a thin thickness and a relatively wide width and length so as to minimize the overall size when the battery cell is charged for the configuration of the battery module. Such a preferable example may be a secondary battery cell having a structure in which an electrode assembly is embedded in a battery case of a laminate sheet including a resin layer and a metal layer, and electrode terminals protrude from both upper and lower ends thereof. It may be a structure in which the electrode assembly is built in the pouch type case. The secondary battery cell of such a structure is also called a pouch type battery cell.

These battery cells constitute one unit module in a structure wrapped in a high-strength cell cover made of synthetic resin or metal in two or more units, and the high-strength cell cover protects the battery cells having low mechanical rigidity while charging and discharging. By suppressing repeated expansion and contraction changes it prevents the sealing of the battery cell is separated. Therefore, it becomes possible to manufacture a medium-large battery module with more excellent safety ultimately.

The battery cells in the unit module or between the module modules are connected in series and / or in parallel, and in a preferred embodiment, the electrode terminals are arranged with the battery cells arranged longitudinally in series so that their electrode terminals are continuously adjacent to each other. After combining, the plurality of unit modules may be manufactured by folding the battery cells in two or more units so as to overlap each other and wrapping the cells in a predetermined unit by the cell cover.

More specific details of a unit module and a rectangular battery module manufactured using a plurality of such unit modules are disclosed in Korean Patent Application No. 2006-45443, filed by the present applicant, which is incorporated herein by reference.

As used herein, the term “facing arrangement” means that two rectangular battery modules are arranged such that their same portions face each other. For example, in the rectangular battery module having a structure in which the input / output terminals are located at one side, the input / output terminals of each of the rectangular battery modules may be arranged to face the one side (a) of the hexahedral stack. Such an opposing arrangement has an advantage of further simplifying the configuration for electrical connection and the like.

In such an opposing arrangement structure, a surface on which the input and output terminals are located (terminal alignment surface: a) is preferably equipped with a power relay assembly (PRA) for preventing overcurrent and overvoltage, voltage drop when removing the battery module assembly, and the like. Can be.

In addition, a battery management system (BMS), which is a battery control system for controlling the operation of a battery module, is mounted on a surface (terminal orientation surface: a) or an opposing surface (d) of the terminal alignment surface (a) where the input / output terminals are located. Structure can be used. This structure allows easy connection with input / output terminals or slave BMSs located on opposite sides, further simplifies the electrical connection structure and thus the assembly process, and reduces the length of the electrical connection means to prevent an increase in internal resistance. It is possible to reduce the risk of disconnection of the connection means due to an external impact.

In the battery module assembly of the present invention, the BMS may be mounted with or spaced apart from the PRA. Preferably, the BMS is mounted with the PRA or adjacent to the PRA on the side where the input / output terminals are located. It may be a structure that is installed at a predetermined distance or connected by an electrical connection means.

The battery cells or unit modules inside the rectangular battery module are arranged to be parallel to the pair of opposing faces b and c of the hexahedral stack to achieve high space utilization, so that the opposing faces b and c of the hexahedral stack are arranged. The rectangular battery modules are also arranged in parallel. The refrigerant moves between the rectangular battery modules to remove heat generated from the battery cells during charging and discharging.

On the other hand, the frame member for fixing the rectangular battery modules in the battery module assembly of the present invention is fixed only the outer peripheral edges of the hexahedral stack, so as to induce the refrigerant to flow in a predetermined direction, and at the same time, In order to reduce the temperature variation of the outer and inner rectangular battery modules, the opposing surfaces b and c may be preferably equipped with a sealing member.

That is, by closing the both sides of the hexahedral stack by mounting the sealing member on both opposing surfaces (b, c) on both sides of the hexahedral stack, the refrigerant is moved only through the hexahedral stack. Therefore, when the sealing member is not mounted, relatively fast cooling of the outer rectangular battery module opened to the outside is prevented. Generally, fast cooling of the battery module is preferable, but in the medium and large battery system, the high cooling rate of only some of the battery modules causes an unbalance between the battery modules, and such an imbalance ultimately accelerates the deterioration of the battery cell. Therefore, the sealing member forms a flow path of the refrigerant (air) and at the same time serves to increase the temperature uniformity between the unit battery modules.

The sealing member may have a structure that is bent so that the refrigerant passage is formed on the inner surface facing the rectangular battery module. In addition, in order to further increase the temperature uniformity between the battery modules as described above, the sealing member is preferably made of a heat insulating material. In particular, the sealing member may be made of a foamable resin so as to increase the thermal insulation while minimizing the total weight of the battery module assembly.

The frame member for fixing the outer circumferential edge of the hexahedral stack consisting of the rectangular battery modules can be a variety of structures, for example, it may be made of a structure in which each of the frames fixing the 12 hexahedral corners are integrally formed or Alternatively, the frame may be integrally formed with frames fixing four corners of at least one surface thereof.

Preferably, the frames fixing each of the four corners located on the pair of faces b and c facing each other in the six-layered stack are integrally formed, and the remaining four individual frames are connected to the one-piece frames. It may be a fastening structure. Such a fastening structure, for example, uses the individual frames in two units to fix the rectangular battery modules in the upper row and the rectangular battery modules in the lower row in each set, and fastens two unitary frames to these individual frames. As a result, assembling of the battery module assembly becomes possible, the efficiency of the assembling process is excellent.

The sealing member described above may optionally close both opposing faces b and c of the hexahedral stack in a manner mounted on the frame member.

In addition, the PRA and BMS described above may have a structure in which safety elements and control elements are mounted on a plate that is fastened to a frame member that fixes corners of one surface of a six-side stack. In one preferred example, the PRA and BMS can be constructed with a structure that mounts multiple devices on a plastic substrate and electrically connects them by bus bars. Here, since the plastic substrate is coupled to the frame member, the plastic substrate may also serve to maintain the mold of the frame member.

Accordingly, the present invention also provides a high output large-capacity battery pack configured by connecting a plurality of battery module assemblies.

In addition, the battery pack according to the present invention can be manufactured by combining the battery modules according to the desired output and capacity, and considering the mounting efficiency, structural stability, etc. as described above, has a limited mounting space and frequent vibration and strong impact Although it can be preferably used as a power source such as an electric vehicle, a hybrid electric vehicle, an electric motorcycle, an electric bicycle exposed to the back, the scope of application is not limited to these.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited by the scope of the present invention.

1 is a perspective view schematically showing a structure in which a hexagonal stack of rectangular battery modules is fixed by frame members in a battery module assembly according to an embodiment of the present invention, and FIG. A perspective view of a structure excluding the BMS is schematically illustrated.

Referring to these drawings, the battery module assembly 100 includes six rectangular battery modules 201, 202, 203, 204, 205, and 206, and a frame fixing the outer circumferential edges of the hexahedral stack 200a of the rectangular battery modules. It consists of the member 300, the PRA 400 and the BMS 500, and the mounting frame 380 as a frame member connected with an external device, and shows the rectangular parallelepiped shape as a whole.

The six rectangular battery modules 201, 202, 203, 204, 205, and 206 are stacked three by one in the transverse direction and two by the longitudinal direction, and the input / output terminals 240 formed at one side thereof are It is laminated | stacked in the opposing arrangement structure so that it may adjoin each other. That is, the upper row battery modules 201, 202, 203 and the lower row battery modules 204, 205, 206 have a symmetrical structure with respect to the virtual center line, so that the upper row battery modules 201, 202 and 203 are stacked on the battery modules 204, 205 and 206 in the lower row in an inverted form.

Each of the rectangular battery modules 201, 202, 203, 204, 205, and 206 has a structure in which a plurality of plate-shaped unit modules are built in a standing form, and details thereof will be described later with reference to FIG. 5. Explain.

The frame member 300 has a structure in which a plurality of frames are combined to stably fix 12 outer peripheral edges of the six-sided laminate 200a, and the six-sided laminate in a state where the six-sided laminate 200a is mounted. Six faces of 200a are open to the outside.

Mounting frame 380 includes a coupling portion bent so that both ends protrude outward, the coupling portion is formed with a fastening groove 382 for engaging with an external device (not shown). Therefore, the bolt / nut can be fastened to each other. The coupling groove 382 of the coupling portion may be replaced with other structures that may be coupled with other external devices. In addition, the mounting frame 380 may itself be a frame member for fixing the arrangement state of the battery module assembly, or may be a separate member additionally coupled to such a frame member.

A sealing member 370 is inserted into the central hollow portion formed between the frame member 300 and both sides of the six-sided stack 200a, and an 'H' shaped frame 372 is additionally mounted on the outer surface of the sealing member. It is. The sealing member 370 is made of a foamable resin to increase the heat insulation effect and lower the weight, and a bent structure (not shown) is formed on the inner side to form a flow path of the refrigerant.

FIG. 3 schematically illustrates a structure in which a PRA is mounted on one side of the hexahedral laminate, and FIG. 4 schematically illustrates a structure in which a BMS is additionally mounted in the structure of FIG. 3.

Referring to these drawings, on the front side of the hexahedral stack (FIG. 1: 200a) where the input / output terminals (FIG. 2: 240) are located, a current is charged and discharged as necessary to start charging and discharging the battery system. The PRA 400 is mounted to appropriately lower the voltage in the disassembling process, to electrically connect the rectangular battery modules, and to protect the circuit from overcurrent and overvoltage. Since the input / output terminals of the rectangular battery modules are adjacent to each other, the connection of the PRA 400 is easy and the length of the member for the electrical connection can be greatly reduced. The battery control system BMS 500 for controlling the operation of the battery module is installed adjacent to the PRA (400) and has a structure that is electrically connected by a connection member.

More details of the PRA 400 will be described later separately with reference to FIG. 10.

The battery module assembly 100 including the PRA 400 and the BMS 500 may be effectively mounted to an external device or device by a mounting frame coupling part (FIG. 2: 380).

5 is a perspective view of the rectangular battery module constituting the hexahedral stack in the battery module assembly of Figure 1, Figure 6 and Figure 7 is a perspective view of the structure of the unit module and the pack case constituting the rectangular battery module It is shown as. 8 and 9 schematically illustrate perspective views of the battery cells and the cell cover constituting the unit module.

Referring to these drawings, the rectangular battery module 201 has a structure in which the unit module stack 210 is mounted on the pack cases 220 and 230 of the up and down assembly type in a state of standing upright. The input / output terminal 240 is formed on the front surface of the upper case 220. A bus bar 250 for electrical connection with the input / output terminal 240 is formed on the front surface of the lower case 230, and a connector 260 for connection of a sensor for detecting voltage and temperature is formed on the rear surface.

The unit module stack 210 has a structure in which four unit modules 211, 212, 213, and 214 are electrically connected and stacked. Each unit module 211 has a structure in which a positive electrode terminal and a negative electrode terminal are connected to two battery cells 210a and 210b formed at both ends in series to be wrapped with a high strength cell cover 210c in a state in which the electrode terminals are bent. Consists of

For further details about the rectangular battery module 201, as described above, reference may be made to the contents described in Korean Patent Application No. 2006-45443.

10 schematically illustrates the structure of the PRA.

Referring to FIG. 10, the PRA 400 has a structure in which various elements are mounted on a thick plastic substrate 410 and are connected by bus bars and wires.

The insulating plastic substrate 410 has a shape and size that can be installed to correspond to the open right side of the battery module assembly surrounded by the frame member 300 in FIG. 2, and coupling fastening portions 412 are provided at both sides. Since it protrudes, it is mechanically fastened with the PRA fastening portion 312 protruding into the frame member 300 of FIG.

Accordingly, the plastic substrate 410 of the PRA 400 not only provides a space in which relevant elements, bus bars and wires are mounted, but also serves as a structure for supporting the frame of the frame member.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

As described above, the battery module assembly according to the present invention has a compact structure that can be stably mounted in a minimum space in a limited space such as a vehicle, and it is easy to mount a mounting frame to an external device, and mutually Since the bond force is formed in an improved structure, the structural stability against external impact is excellent.

1 is a schematic diagram of a structure in which a hexahedral stack of rectangular battery modules in a battery module assembly according to an embodiment of the present invention is fixed by frame members;

FIG. 2 is a schematic diagram of a structure excluding PRA and BMS in the battery module assembly of FIG. 1; FIG.

3 is a schematic diagram of a structure in which the PRA is mounted on one side of the hexahedral stack in the battery module assembly;

4 is a schematic diagram of a structure in which a BMS is additionally mounted to the structure of FIG. 3;

FIG. 5 is a schematic diagram of a structure of a rectangular battery module constituting a hexahedral stack in the battery module assembly of FIG. 1; FIG.

6 and 7 are schematic views of the structure of the unit module and the pack case constituting the rectangular battery module;

8 and 9 are schematic views of the battery cells and the cell cover constituting the unit module;

10 is a schematic view of a PRA mounted to the battery module assembly.

Claims (22)

A plurality of rectangular battery modules, in which a plurality of battery cells or unit modules are connected in series, are stacked two or more in the width direction (longitudinal direction) and in the height direction (lateral direction) to form a hexahedron structure (hexahedral stack). The outer peripheral edges of the hexahedral stack are fixed by a frame member, and coupling portions for mounting the battery module assembly to an external device are provided at frame members for fixing the corners of one side of the hexahedral stack. The mounting frame is formed in each of the installed structure, The rectangular battery module is a rectangular parallelepiped having a large width to height, and the six-sided laminate is a battery module assembly, characterized in that the overall rectangular parallelepiped structure. The battery module assembly according to claim 1, wherein the coupling part of the mounting frame is formed of two plate-shaped members that are bent to protrude outward while each end is coupled to the frame member. According to claim 1, wherein the hexahedral stack has two rectangular battery modules arranged in the transverse direction opposite to each other, one or more rectangular battery modules are arranged in the longitudinal direction for each rectangular battery module Battery module assembly, characterized in that made of a structure. delete The method of claim 1, wherein the unit module is a structure in which the plate-shaped battery cells having the electrode terminals formed on the top and bottom, respectively, are connected in series, two or more of the electrode terminals are bent to form a laminated structure The battery module assembly, characterized in that it comprises a high-strength cell cover coupled to surround the outer surface of the battery cells, except for the electrode terminal portion. The battery module assembly of claim 1, wherein the input / output terminals of each of the rectangular battery modules are oriented to face one surface (a) of the hexahedral stack. The battery module assembly of claim 6, wherein a power relay assembly (PRA) and a battery management system (BMS) are mounted on the alignment surface (a) of the input / output terminals. The method of claim 6, wherein the battery cells or unit modules in the rectangular battery module are arranged parallel to the pair of opposing surfaces (b, c) of the hexahedral stack, the opposing surfaces (b, c) The battery module assembly, characterized in that the sealing member is mounted. The battery module assembly of claim 8, wherein the sealing member is bent to form a refrigerant passage on an inner surface of the rectangular battery module. The battery module assembly of claim 8, wherein the sealing member is made of a heat insulating material. The battery of claim 1, wherein the frame member is integrally formed with respective frames fixing twelve hexahedral edges or integrally formed with frames for fixing four corners of at least one side thereof. Module assembly. 12. The frame member of claim 11, wherein the frame member is integrally formed with frames fixing four corners respectively located on a pair of faces b and c facing each other of the six-dimensional laminate, and the remaining four individual frames. The battery module assembly, characterized in that made of a structure that is fastened to the one-piece frames. 13. The battery module assembly of claim 12, wherein a sealing member is mounted to the unitary frames. The method according to claim 12, wherein the rectangular frames of the upper row and the rectangular battery modules in the lower row are fixed to each set by using the individual frames in two units, and the two integral frames are fastened to these individual frames. Battery module assembly, characterized in that. The battery module assembly according to claim 7, wherein the PRA and the BMS have safety elements and control elements mounted on a plate that is fastened to a frame member that fixes corners of one side of the six-layered laminate. Medium and large battery pack containing a battery module assembly according to claim 1. The medium and large battery pack of claim 16, wherein the battery pack is used as a power source for an electric vehicle or a hybrid electric vehicle. A plurality of rectangular battery modules, in which a plurality of battery cells or unit modules are connected in series, are stacked two or more in the width direction (longitudinal direction) and in the height direction (lateral direction) to form a hexahedron structure (hexahedral stack). The outer peripheral edges of the hexahedral stack are fixed by a frame member, and coupling portions for mounting the battery module assembly to an external device are provided at frame members for fixing the corners of one side of the hexahedral stack. The mounting frame is formed in each of the installed structure, The coupling portion of the mounting frame is a battery module assembly, characterized in that consisting of two plate-shaped members bent so as to project outward in the state that each end is coupled to the frame member. A plurality of rectangular battery modules, in which a plurality of battery cells or unit modules are connected in series, are stacked two or more in the width direction (longitudinal direction) and in the height direction (lateral direction) to form a hexahedron structure (hexahedral stack). The outer peripheral edges of the hexahedral stack are fixed by a frame member, and coupling portions for mounting the battery module assembly to an external device are provided at frame members for fixing the corners of one side of the hexahedral stack. The mounting frame is formed in each of the installed structure, The hexahedral stack has a structure in which one or more rectangular battery modules are arranged in a longitudinal direction with respect to each rectangular battery module in a state in which two rectangular battery modules are arranged to face each other in a lateral direction. Battery module assembly. A plurality of rectangular battery modules, in which a plurality of battery cells or unit modules are connected in series, are stacked two or more in the width direction (longitudinal direction) and in the height direction (lateral direction) to form a hexahedron structure (hexahedral stack). The outer peripheral edges of the hexahedral stack are fixed by a frame member, and coupling portions for mounting the battery module assembly to an external device are provided at frame members for fixing the corners of one side of the hexahedral stack. The mounting frame is formed in each of the installed structure, The unit module is a structure in which the plate-shaped battery cells are formed in the upper and lower electrode terminals are connected to each other in series, the two or more battery cells are bent to form a stacked structure of the connecting portion of the electrode terminals, and Battery module assembly, characterized in that it comprises a high-strength cell cover coupled to surround the outer surface of the battery cells, except for the electrode terminal portion. A plurality of rectangular battery modules, in which a plurality of battery cells or unit modules are connected in series, are stacked two or more in the width direction (longitudinal direction) and in the height direction (lateral direction) to form a hexahedron structure (hexahedral stack). The outer peripheral edges of the hexahedral stack are fixed by a frame member, and coupling portions for mounting the battery module assembly to an external device are provided at frame members for fixing the corners of one side of the hexahedral stack. The mounting frame is formed in each of the installed structure, Battery module assembly, characterized in that the input and output terminals of each of the rectangular battery modules are oriented toward one surface (a) of the hexahedral stack. A plurality of rectangular battery modules, in which a plurality of battery cells or unit modules are connected in series, are stacked two or more in the width direction (longitudinal direction) and in the height direction (lateral direction) to form a hexahedron structure (hexahedral stack). The outer peripheral edges of the hexahedral stack are fixed by a frame member, and coupling portions for mounting the battery module assembly to an external device are provided at frame members for fixing the corners of one side of the hexahedral stack. The mounting frame is formed in each of the installed structure, The frame member is a battery module assembly, characterized in that each of the frames fixing the 12 hexahedral corners are integrally formed, or that the frames fixing the four corners of at least one side are integrally formed.

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