KR101596266B1 - Polyhedral Battery Cell and Battery Module Assembly Employed with the Same - Google Patents

Abstract

The present invention relates to a battery case having an electrode assembly having a separator structure interposed between a positive electrode and a negative electrode, and a positive electrode, a negative electrode, and a negative electrode in a polyhedral battery case, A polyhedral battery cell is provided.
Such a polyhedral battery cell can provide a battery module with a compact structure that is easy to disassemble and assemble by providing a unified battery cell with a specific structure, thereby increasing the efficiency of the manufacturing process, , The voltage and the external shape can be easily varied.

Description

Technical Field [0001] The present invention relates to a polyhedral battery cell and a battery module assembly including the same,

The present invention relates to a polyhedral battery cell and a battery module assembly including the same. More particularly, the present invention relates to a polyhedral battery cell including a polyhedral battery case having an anode assembly, a cathode assembly, and an electrode assembly having a separator structure interposed between the anode assembly and the cathode assembly, And a battery module assembly including the polyhedron battery cell as a unit cell. The present invention relates to a polyhedron battery cell, and more particularly, to a polyhedron battery cell having a polyhedron and an anode terminal.

BACKGROUND ART [0002] In recent years, rechargeable secondary batteries have been widely used as energy sources for wireless mobile devices. In addition, the secondary battery is an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (HEV), and the like, which are proposed as solutions for air pollution of existing gasoline vehicles and diesel vehicles using fossil fuels (Plug-In HEV) and the like.

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 middle- or large-sized battery module is preferably manufactured in a small size and weight, a prismatic battery, a pouch-shaped battery, or the like, which can be charged with a high degree of integration and has a small weight to capacity, is mainly used as a battery cell have.

Fig. 1 schematically shows a perspective view of a conventional pouch-type battery using an aluminum laminate sheet or the like as an exterior member. The pouch-shaped battery 10 shown in Fig. 1 has a structure in which two electrode terminals 11 and 12 protrude from the upper end and the lower end of the battery body 13, respectively. The outer casing 14 is composed of two upper and lower units and has opposite side surfaces 14b and upper and lower ends 14a and 14c (not shown), which are in mutual contact with each other in a state in which an electrode assembly (not shown) The battery 10 is made. The exterior material 14 is made of a laminate structure of a resin layer / metal foil layer / resin layer so that heat and pressure can be applied to both side surfaces 14b and the upper and lower ends 14a and 14c which are in contact with each other, , And may be adhered using an adhesive as the case may be. Both side surfaces 14b are directly contacted with the same resin layer of the upper and lower casing members 14, so that uniform sealing is possible by melting. On the other hand, since the electrode terminals 11 and 12 protrude from the upper end 14a and the lower end 14c, the sealing property can be improved in consideration of the thickness of the electrode terminals 11 and 12 and the heterogeneity with the material of the casing 14 So that the electrode terminals 11 and 12 are thermally fused with the sealing member 16 interposed therebetween.

However, since the exterior material 14 itself is not excellent in mechanical rigidity, in order to manufacture a battery module having a stable structure, generally, battery cells (unit cells) are mounted in a pack case such as a cartridge to manufacture a battery module have. However, since a mounting space is limited in a device or a vehicle in which a middle- or large-sized battery module is mounted, when the size of the battery module is increased due to the use of a pack case such as a cartridge, a problem of low space utilization is caused. Further, the low mechanical rigidity of the battery cell is caused by the repeated expansion and contraction of the battery cell during charging and discharging, resulting in a case where the heat-welded portion is separated.

On the other hand, battery cells using a cylindrical case, a rectangular case, and the like are also used, and they are designed and applied in various appearance and structure according to the mounting site or application environment of the applied device.

These various types of battery cells are subjected to various verification tests to verify their structural stability and operational safety before being mounted on an applied device. Therefore, in the case of the battery cells whose appearance and structure are changed, it is troublesome to perform the verification test each time before being mounted on the applied device.

In addition, since the conventional battery cells include various types of external appearance and structure, in order to stably mount the battery cells and to electrically connect the electrode terminals in constructing a plurality of such battery cells with one battery module, The structure becomes complicated, and such a complicated type of battery module is a factor that lowers the efficiency of the manufacturing process. Further, in achieving the electrical connection of a plurality of battery cells, another connecting member is required, and another safety member is required again in order to secure the electrical safety by such connecting member.

On the other hand, the conventional battery module is configured such that it is difficult for the consumer to disassemble and assemble the battery module in order to prevent the safety of use and the electric hazard to the consumer and to maintain the stability according to the mounting site or application environment of the applied device .

Therefore, when a problem occurs in some of the battery cells included in the conventional battery module, there is a problem that it is troublesome to replace the entire battery module and an additional cost is incurred.

Therefore, it is possible to make a battery module having a single structure and a compact structure, to easily replace only the battery cell in which a problem has occurred from the battery module, and to provide a battery module having various capacities and appearance There is a high need for a battery cell that can be easily manufactured.

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

SUMMARY OF THE INVENTION An object of the present invention is to provide a positive electrode terminal and a negative electrode terminal in a polyhedral shape in which a battery case having a polyhedral shape with an electrode assembly is embedded and a single- The present invention provides a battery cell that can reduce the number of verification tests related to structural safety for different products and thereby increase the efficiency of the manufacturing process.

Another object of the present invention is to provide a battery module having a compact structure in which a plurality of unified battery cells of a specific structure can be easily stacked or arranged.

It is still another object of the present invention to provide a battery module in which battery cells unified in a specific structure are stacked or arranged so that only a battery cell in which a problem has occurred can be easily replaced. In addition, it is possible to easily replace only the battery cell in which a problem has occurred, thereby reducing the cumbersome and costly replacement of the entire battery module, and providing a battery module capable of improving the convenience of use and safety of the battery module .

It is another object of the present invention to provide a battery cell in which one battery module can be manufactured by suitably stacking or arranging battery cells according to the specifications (capacity, voltage, external shape, etc.) of a customer.

According to an aspect of the present invention, there is provided a battery cell including a polyhedral battery case having an anode assembly, a cathode assembly, and an electrode assembly having a separator structure interposed between the anode assembly and the cathode assembly, And a positive electrode terminal and a negative electrode terminal are formed integrally with each other.

In the present invention, " the positive electrode terminal and the negative electrode terminal are formed on the outer surface of the battery case integrally in a polyhedron shape " means that the positive electrode terminal and the negative electrode terminal form a polyhedral surface, Means a structure that contributes to the outer shape of the polyhedron by forming at least a part thereof and does not cause a change in the shape of the polyhedron as a whole. Since such an integrated structure should be judged from the overall viewpoint, deviation in height, depth, surface smoothness and the like is tolerated within a range or range that does not cause distortion of the polyhedral shape.

As described above, prior art battery cells must undergo various verification tests to verify their structural stability and operational safety before being mounted on the application device, depending on their form. In addition, since the battery cells of the related art include various types of external appearance and structure, in order to stably mount the battery cells and to electrically connect the electrode terminals in constructing a plurality of such battery cells with one battery module, The structure is complicated and the efficiency of the manufacturing process is deteriorated.

On the contrary, in the battery cell according to the present invention, the electrode assembly is embedded in the polyhedral battery case, and the positive electrode terminal and the negative electrode terminal are integrally formed on the outer surface of the battery case in a polyhedral shape. The number of verification tests related to the structural safety of each product can be reduced, thereby increasing the efficiency of the manufacturing process.

In one specific example, the electrode assembly may be of a stack, jelly-roll, or stack-folding type, but is not limited thereto.

The polyhedral battery cell may be a secondary battery, for example, a lithium secondary battery having high energy density, discharge voltage, and output stability. The components of such a lithium secondary battery will be described in detail below.

Generally, a lithium secondary battery is composed of a positive electrode, a negative electrode, a separator, a non-aqueous electrolyte containing a lithium salt, and the like.

The positive electrode is prepared, for example, by applying a mixture of a positive electrode active material, a conductive material and a binder on a positive electrode current collector, followed by drying, and if necessary, a filler is further added. The negative electrode is also manufactured by applying and drying the negative electrode material on the negative electrode collector, and if necessary, may further include the above-described components.

The separation membrane is interposed between the cathode and the anode, and an insulating thin film having high ion permeability and mechanical strength is used.

The lithium salt-containing nonaqueous electrolyte solution is composed of a nonaqueous electrolyte and a lithium salt. As the nonaqueous electrolyte solution, a liquid nonaqueous electrolyte, a solid electrolyte, and an inorganic solid electrolyte are used.

The collector, the electrode active material, the conductive material, the binder, the filler, the separator, the electrolyte, and the lithium salt are well known in the art, and a detailed description thereof will be omitted herein.

Such a lithium secondary battery can be produced by a conventional method known in the art. That is, a porous separator may be inserted between the anode and the cathode, and an electrolyte may be injected into the separator.

The anode can be produced, for example, by applying a slurry containing the above-described lithium transition metal oxide active material, a conductive material and a binder on a current collector, followed by drying. Likewise, the negative electrode can be produced, for example, by applying a slurry containing the above-described carbon active material, a conductive material and a binder onto a thin current collector and then drying it.

In the present invention, the polyhedral shape may be one selected from the group consisting of a regular tetrahedron, a cube, an octahedron, a square pillar, a rectangular pillar, a square pillar, a hexagonal pillar, a triangular pyramid and a quadrangular pyramid, .

Since the polyhedrons having such a shape can be easily arranged or stacked by mutual surface contact, a single battery module can be stably formed. Further, since the corners are arranged in contact with each other, it is possible to prevent an unnecessary space from being generated by arranging or stacking a plurality of battery cells, thereby making it possible to construct a compact battery module.

Fig. 2 is a perspective view showing the shape of a cube of the polyhedral shape. Referring to FIG. 2, one cube 100 has six sides in a square shape and includes four upper corners 111, 112, 113 and 114, four side corners 121, 122, 123, 124, and four lower edges 131, 132, 133, 134. In addition, one cube 100 includes four upper vertices 101, 102, 103 and 104 and four lower vertices 105, 106, 107 and 108.

As used herein, the term " edge of a battery cell " refers to vertexes 101, 102, 103, 104, 105, 106, 107 and 108 where three edges meet, Means the edges 111, 112, 113, 114, 121, 122, 123, 124, 131, 132, 133, 134 in which two faces meet.

In one specific example, the structure may be such that the cathode terminal and the cathode terminal are located on at least one pair of edges facing at least one side of the battery case.

The positive electrode terminal and the negative electrode terminal may be, for example, triangular shapes conforming to the shape of the edge, and the positive electrode terminal and the negative electrode terminal may be extended beyond one adjacent surface.

In another specific example, the structure may be such that the cathode terminal and the cathode terminal are located on at least one pair of sides facing at least one side of the battery case.

In such a structure, the positive electrode terminal and the negative electrode terminal may have a rectangular shape corresponding to, for example, the shape of the side, and the positive electrode terminal and the negative electrode terminal may have a structure extending beyond one adjacent side.

Therefore, the battery case including such a shape and positional relationship naturally comes into contact with a pair of opposing edges when the two or more battery cells are arranged or laminated adjacent to each other, so that the electrode terminals of each battery cell are electrically It can be easily connected. Further, this electrical connection method can be achieved by simply arranging or stacking the battery cells adjacent to each other without an additional connecting member, so that the battery module can be formed more easily.

As described above, the positive electrode terminal and the negative electrode terminal can be appropriately determined to have a width and a length that can easily contact electrode terminals of another adjacent battery case, so that it is not particularly limited, but preferably, The width of the negative terminal may be 10 to 50% of the average length of the sides of the polyhedron of the battery case, and the length of the positive and negative terminals may be the average length of the polyhedron And may be formed in a size of 10 to 100%.

In one specific example, the outer surface of the battery case may be further provided with one or more fixing portions which can be mutually fixed when stacked or arranged adjacent to the battery case of another polyhedral battery cell.

Specifically, the fixing portion is not particularly limited as long as it is a structure that can be stably interlocked with other adjacent battery cases. Preferably, the fixing portion is a recessed fastening portion and a recessed fastening portion corresponding to the projecting fastening portion, Or may be a structure that is fixed by a sticky material.

In one specific example, the capacity of the polyhedral battery cell may be 1.0 Ah to 50.0 Ah, and the full charge voltage of the polyhedral battery cell may be 1.0 V to 6.0 V.

For example, when a battery module having a capacity of 20 Ah is manufactured, five battery cells having a capacity of 4 Ah are combined, or four battery cells having a capacity of 5 Ah are assembled Or a combination of two battery cells having a capacity of 10 Ah. If necessary, such a configuration may be appropriately changed according to the capacity of the battery cell constituting the unit battery of the battery module.

Therefore, the battery cell according to the present invention can be manufactured by suitably combining the battery cells according to the requirements of the customer.

The present invention also provides a battery module in which at least one polyhedral battery cell is electrically connected to the module case,

The battery module includes:

An outer case for housing at least one of the polyhedral battery cells therein;

An insulating member interposed between the polyhedral battery cells to prevent an electrical short between the polyhedral battery cells that are not electrically connected; And

An external input / output terminal electrically connected to the electrode terminals of the polyhedral battery cells housed therein;

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In one specific example, the polyhedral battery cells housed in the module case may be connected in series or in parallel.

Therefore, the battery module according to the present invention can be configured by stacking or arranging the battery cells having a unified structure. Further, the electrical connection between the battery cells housed in the battery module is achieved not by the additional electrical connecting member but by the electrode terminals formed on the outer surface of each battery cell case. Therefore, compared with the battery module of the related art, A simple and stable internal structure of the battery module can be achieved.

In another specific example, the outer case may include an upper case and a lower case, and the upper case and the lower case may be mutually coupled by a prefabricated fastening structure.

Such a structure can achieve a structure of an external case of a battery module compared to a battery module according to the related art, so that disassembly and assembly of the external case in the battery module is also easy. Also, with this configuration, the battery module manufacturing process can achieve improved efficiency.

In addition, due to the battery module structure that is easy to disassemble and assemble as described above, it is possible to easily replace only the battery cell in which the problem has occurred.

In one specific example, the insulating member is not particularly limited as long as it is a member or a material for preventing unintended electrical connection of the battery cells housed in the battery module case. However, for example, the insulating member may be an electrically insulating substrate, And an electrically insulating coating material.

The battery module according to the present invention can achieve electrical connection between battery cells constituting the battery module without any additional member, and at the same time can achieve a battery module with a compact structure.

The present invention also provides a battery pack in which the battery module is mounted in at least one of the number of battery pack cases. Also, the present invention provides a device including the battery pack as a power source, wherein the device is a notebook computer, a netbook, a tablet PC, a smart pad, an electric vehicle, a hybrid electric vehicle, a plug- Etc., but is not limited to these.

The structure and manufacturing method of such a device are well known in the art, so a detailed description thereof will be omitted herein.

Further, the present invention provides an unmanned vending machine for supplying the polyhedral battery cell, wherein the unmanned vending machine is a unmanned vending machine for allowing a consumer to input a money corresponding to each battery cell, .

Since the unmanned vending machine of the present invention can be based on a conventionally known unmanned vending machine such as beverage, food, etc., detailed description thereof will be omitted herein.

As described above, in the battery cell according to the present invention, the electrode assembly is embedded in the polyhedral battery case, and the positive electrode terminal and the negative electrode terminal are integrally formed on the outer surface of the battery case in the form of a polyhedron, Structure is unified into one structure, so that the number of verification tests related to the structural safety can be reduced for each product having a different structure, thereby improving the efficiency of the manufacturing process. In addition, it is possible to provide a battery module with a compact structure which can be easily stacked or arranged by arranging a plurality of unified battery cells with a specific structure.

1 is a perspective view of a battery cell constituting a battery module according to the prior art;
2 is a perspective view showing the shape of a cube;
3-7 are perspective views of a battery cell according to one embodiment of the present invention;
FIG. 8 is a perspective view illustrating a size relationship of electrode terminals of a battery cell according to an embodiment of the present invention; FIG.
FIGS. 9 and 10 are schematic views illustrating a process of configuring a battery module according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings, but the scope of the present invention is not limited thereto.

3-7 illustrate perspective views of a battery cell in accordance with one embodiment of the present invention.

Referring to FIG. 3, the battery cells 200, 210 and 220 according to an embodiment of the present invention include an electrode assembly (not shown) therein, and a battery case 203, 213, 223). The outer surfaces of the battery cases 203, 213 and 223 are provided with positive terminal terminals 201, 211 and 221 and negative terminal terminals 202 and 212 And 222, respectively.

The anode terminals 201, 211 and 221 and the cathode terminals 202 and 212 and 222 are formed in triangular shapes conforming to the shape of an edge on the edges of the cell cases 203, 213 and 223 in the shape of a cube have. Specifically, the positive electrode terminal 201 and the negative electrode terminal 202 of one battery cell 200 face each other in a diagonal direction on one same surface, and the positive electrode terminal 211 and the negative electrode terminal 202 of the other battery cell 210, And the anode terminal 221 and the cathode terminal 222 of the remaining battery cell 220 are formed adjacent to each other on one same surface and the edges 222 and 222 facing each other in the three- Respectively.

Referring to FIG. 4, the battery cells 300, 310, 320, and 330 according to an embodiment of the present invention include an electrode assembly (not shown) 313, 323 and 333 are formed on the outer surfaces of the battery cases 303, 313, 323 and 333 in such a manner as to be integrated with the outer surfaces of the battery cases 303, 313, 311, 321, and 331 and negative electrode terminals 302, 312, 322, and 332, respectively.

The anode terminals 301, 311, 321 and 331 and the anode terminals 302, 312, 322 and 332 are formed on the edges of the cell cases 303, 313, 323 and 333 in the shape of a cube, And extends downward to the adjacent surface. Specifically, the positive electrode terminal 301 and the negative electrode terminal 302 of one battery cell 300 are formed facing each other on one same plane in a diagonal direction, and are formed to extend downward to adjacent surfaces. Other battery cells 310,320 and 330 illustrate various positions and extension lengths of the positive terminals 311,321 and 331 and the negative terminals 312,322 and 332. [

Referring to FIG. 5, the battery cells 400, 410, 420, and 430 according to an embodiment of the present invention include an electrode assembly (not shown) therein, and a battery case 403, 413, 423, and 433 are formed on the outer surfaces of the battery cases 403, 413, 423, and 433. The positive terminals terminals 401, 411, 421, and 431 and negative electrode terminals 402, 412, 422, and 432, respectively.

The anode terminals 401, 411, 421 and 431 and the anode terminals 402, 412, 422 and 432 are formed on the edges of the cell cases 403, 413, 423 and 433, And extends downward to the adjacent surface. Specifically, the positive electrode terminal 401 and the negative electrode terminal 402 of one battery cell 400 face each other on the same surface and extend downward to the adjacent surface. The other battery cells 410, 420 and 430 indicate various positions and extension lengths of the positive electrode terminals 411, 421 and 431 and the negative electrode terminals 412, 422 and 432.

Referring to FIG. 6, the battery cells 500, 510, and 520 according to an embodiment of the present invention include an electrode assembly (not shown) therein, and a battery case 503, 513, The positive electrode terminals 501, 511 and 521 and the negative electrode terminals 523 are integrally formed on the outer surfaces of the battery cases 503, 513 and 523 on the outer surfaces of the battery cases 503, 513 and 523, (502, 512, 522) are formed, respectively.

The positive electrode terminals 501, 511 and 521 and the negative electrode terminals 502 and 512 and 522 are formed on two sides of the cell case 503, 513 and 523, And is formed in a rectangular shape and extends to the adjacent surface. Specifically, the positive electrode terminal 501 and the negative electrode terminal 502 of one battery cell 500 are formed on two sides facing each other and extend to the adjacent side. The other battery cells 510 and 520 indicate various positions and extension lengths of the positive electrode terminals 511 and 521 and the negative electrode terminals 512 and 522, respectively.

Referring to FIG. 7, the battery cells 600, 610, and 620 according to one embodiment of the present invention include an electrode assembly (not shown) therein, and a battery case 603, 613, 611 and 621 and the cathode terminals 621 and 622 are formed on the outer surfaces of the battery cases 603 and 613 and the battery case 603 in an integrated form on the outer surfaces of the battery cases 603 and 613 and 623, (602, 512, 522) are formed, respectively.

The positive electrode terminals 601, 611 and 621 and the negative electrode terminals 602 and 612 and 622 are formed on the two sides of the cell case 603, 613 and 623, Are formed in a matching rectangular shape and extend to adjacent surfaces. Specifically, the positive electrode terminal 601 and the negative electrode terminal 602 of one battery cell 600 are formed on two adjacent sides, and extend to adjacent surfaces. The other battery cells 610 and 620 indicate various positions and extension lengths of the positive electrode terminals 611 and 621 and the negative electrode terminals 612 and 622, respectively.

FIG. 8 is a perspective view illustrating a size relationship of electrode terminals of a battery cell according to an embodiment of the present invention.

Referring to FIG. 8, the polyhedral battery cells 140, 150 and 160 according to the present invention are in the shape of a cube, and include electrode terminals formed on each side or each edge. The width W2 of the electrode terminals is formed to be 10 to 50% of the average length W1 of the polyhedrons of the battery case, and the length L2 of the electrode terminals is equal to the average Is formed to have a size of 10 to 100% of the length (L1).

9 and 10 are schematic views illustrating a process of configuring a battery module according to an embodiment of the present invention.

9, in the polyhedron battery cell 700 according to the present invention, the positive electrode terminal 701 and the negative electrode terminal 702 are formed in a triangular shape at an edge portion of the battery case 703, respectively. The battery cells 710 are arranged such that the positive electrode terminal 701 and the negative electrode terminal 702 can be electrically connected to each other in series and then connected to an external case 720 so as to form one battery module 730.

9, a total of nine battery cells 710, 1, 2, 3, 4, 5, 6, and 7 are stacked in a three- ⑦, ⑧, ⑨) are stored. These nine battery cells 710 are electrically connected in series in the order of ①-②-③-⑥-⑤-④-⑦-⑧-⑨. The openings of the battery cells (?,?,?) Housed in the first layer 723 and the openings of the battery cells (?,?,?) Housed in the second layer 724 and the openings of the second layer 724, Insulation members 722 are disposed on the front faces of the battery cells (?,?,?) Housed in the first layer 725 and the battery cells (?,?,?) Housed in the third layer 725. This insulation member 722 is formed by inserting an undesired electrical short circuit (not shown) so that the electrical serial connection of the sequence of ①-②-③-⑥-⑤-④-⑦-⑧-⑨ of the nine battery cells 710 can be achieved smoothly. (For example, electrical short between ⑤-⑧, ⑥-⑨, ①-④, and ②-⑤).

10, a polyhedral battery cell 800 according to the present invention has a rectangular shape in which a pair of side faces of a positive electrode terminal 801 and a negative electrode terminal 802 facing each other on two faces of a battery case 803 Respectively. The battery cells 810 are arranged in such a manner that the positive electrode terminal 801 and the negative electrode terminal 802 can be electrically connected to each other in series and then stored in the external case 820, Module 830.

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.

Claims (24)

An electrode assembly having a separator structure interposed between the positive electrode and the negative electrode and between the positive electrode and the negative electrode is built in the polyhedral battery case,
A positive electrode terminal and a negative electrode terminal are formed on the outer surface of the battery case in the form of a polyhedron,
Wherein the positive electrode terminal and the negative electrode terminal are positioned on at least one pair of edges facing at least one side of the battery case. The polyhedral battery cell according to claim 1, wherein the polyhedral battery cell is a lithium secondary battery. The polyhedral battery cell according to claim 1, wherein the polyhedral shape is one selected from the group consisting of a tetragonal, a cube, an octahedron, a square pillar, a rectangular pillar, a square pillar, a hexagonal pillar, a triangular pyramid, and a quadrangular pyramid. The polyhedral battery cell according to claim 1, wherein the polyhedral shape is a cube. delete The polyhedral battery cell according to claim 1, wherein the positive electrode terminal and the negative electrode terminal have a triangular shape conforming to the shape of the edge. delete delete 2. The polyhedral battery cell according to claim 1, wherein the positive electrode terminal and the negative electrode terminal extend beyond one adjacent surface. The polyhedral battery cell according to claim 1, wherein the widths of the positive electrode terminal and the negative electrode terminal are about 10 to 50% of the average length of the polyhedral shape of the battery case. The polyhedral battery cell according to claim 1, wherein the lengths of the positive electrode terminal and the negative electrode terminal are in a range of 10 to 100% of the average length of the polyhedron-shaped sides of the battery case. The polyhedron battery cell according to claim 1, wherein at least one fixing part is additionally formed on the outer surface of the battery case so as to be mutually fixed when stacking or adjacently arranged with the battery case of another polyhedral battery cell. 13. The polyhedral battery cell according to claim 12, wherein the fixing portion is an indent type fastening portion corresponding to the projection-type fastening portion and the projection-type fastening portion. 13. The polyhedral battery cell according to claim 12, wherein the fixing portion is a sticky material. The polyhedral battery cell according to claim 1, wherein the polyhedral battery cell has a capacity of 1.0 Ah to 50.0 Ah. The polyhedral battery cell according to claim 1, wherein the polyhedral battery cell has a full charge voltage of 1.0 V to 6.0 V. A battery module mounted on a module case with at least one polyhedral battery cell according to claim 1 electrically connected,
An outer case for housing at least one of the polyhedral battery cells therein;
An insulating member interposed between the polyhedral battery cells to prevent an electrical short between the polyhedral battery cells that are not electrically connected; And
An external input / output terminal electrically connected to the electrode terminals of the polyhedral battery cells housed therein;
The battery module comprising: The battery module according to claim 17, wherein the polyhedral battery cells housed in the module case are connected in series or in parallel. The battery module according to claim 17, wherein the outer case includes an upper case and a lower case, and the upper case and the lower case are coupled to each other by a prefabricated fastening structure. 18. The battery module according to claim 17, wherein the insulating member is at least one member selected from the group consisting of an electrically insulating substrate, an electrically insulating adhesive tape, and an electrically insulating coating material. The battery pack according to claim 17, wherein the battery module is mounted on at least one pack case. The device according to claim 21, comprising the battery pack as a power source. 23. The device of claim 22, wherein the device is a notebook computer, a netbook, a tablet PC, a smart pad, an electric vehicle, a hybrid electric vehicle, or a power storage device. The unattended vending machine according to claim 1, characterized by providing the polyhedral battery cell.

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