Battery cell, battery pack, vehicle, and method for manufacturing battery cell

Abstract

The present invention relates to a battery cell, a battery pack, a vehicle, and a method for manufacturing the battery cell. The battery cell according to one embodiment of the present invention comprises: an electrode assembly including a first plane and a second plane that are relatively wide and positioned opposite to each other, and a plurality of side surfaces connecting edges of the first plane and the second plane; and a cell pouch surrounding the electrode assembly and in flat close contact with the first plane, the second plane, and any one of the plurality of side surfaces of the electrode assembly.

Description

Battery cell, battery pack, automobile, and battery cell manufacturing method

[0001] The present invention relates to a battery cell, a battery pack, an automobile, and a method for manufacturing a battery cell.

[0002] Secondary batteries, which offer high applicability across product lines and possess electrical characteristics such as high energy density, are widely applied not only to portable devices but also to electric vehicles (EVs) or hybrid electric vehicles (HEVs) powered by electric driving sources.

[0003] These secondary batteries are attracting attention as a new energy source for improving eco-friendliness and energy efficiency, as they not only have the primary advantage of being able to drastically reduce the use of fossil fuels but also the advantage of not generating any by-products from the use of energy.

[0004] Conventionally, nickel-cadmium batteries or nickel-hydrogen batteries were widely used as secondary batteries; however, recently, lithium secondary batteries are being widely used because they exhibit almost no memory effect compared to nickel-based secondary batteries, allowing for free charging and discharging, have a very low self-discharge rate, and high energy density.

[0005] These lithium secondary batteries primarily use lithium-based oxides and carbon materials as the positive and negative active materials, respectively. The lithium secondary battery comprises an electrode assembly in which a positive plate and a negative plate, each coated with the positive and negative active materials, are arranged with a separator in between, and an outer casing, namely a battery case, that seals and houses the electrode assembly together with an electrolyte.

[0006] Generally, secondary batteries can be classified according to the shape of the casing into cylindrical battery cells in which the electrode assembly is embedded in a metal can, and pouch-type battery cells in which the electrode assembly is embedded in a pouch of aluminum laminate sheet.

[0007] However, in the process of assembling conventional pouch-type battery cells, where the electrode assembly is wrapped in a cell pouch and a seal is formed along the edge of the electrode assembly, the cell pouch may not adhere tightly to the electrode assembly, potentially forming a void inside the battery cell. This void inside the battery cell hinders consistent heat conduction.

[0008] Furthermore, structural constraints arise due to the sealing or folding areas of the cell pouch, such as the battery cell failing to have a smooth lateral shape or having parts protruding. Consequently, these structural limitations prevent the battery cell from adhering closely to the heat dissipation component, or reduce space utilization when the battery cell is housed in a battery module or battery pack.

[0009] The present invention provides a battery cell that minimizes the empty space between the electrode assembly and the cell pouch and evenly forms at least one side.

[0010] In addition, the present invention provides a battery pack and an automobile comprising the aforementioned battery cell.

[0011] In addition, the present invention provides the aforementioned method for manufacturing a battery cell.

[0012] However, the technical problems that the present invention aims to solve are not limited to those described above, and other unmentioned problems will be clearly understood by a person skilled in the art from the description of the invention below.

[0013] A battery cell according to an embodiment of the present invention for solving the above-mentioned problem comprises an electrode assembly including a first plane and a second plane located opposite each other and a plurality of sides connecting the edges of the first plane and the second plane, and a cell pouch that surrounds the electrode assembly and is in flat contact with the first plane and the second plane of the electrode assembly and one of the plurality of sides.

[0014] The plurality of sides of the electrode assembly may include a first side and a second side located opposite each other, connecting the edges of the first plane and the second plane, and a third side and a fourth side located opposite each other, connecting the edges of the first plane and the second plane, and having a relatively smaller area than the first side and the second side.

[0015] The cell pouch above may be configured to be in close contact with the first side of the electrode assembly in a flat manner.

[0016] The cell pouch may include a sealing portion formed by mutually joining the edge of one side of the cell pouch in contact with the first plane of the electrode assembly and the edge of the other side of the cell pouch in contact with the second plane in the direction of the second side, the third side, and the fourth side of the electrode assembly.

[0017] The above-described battery cell may further include an electrode lead that is connected to the electrode assembly at one end and protrudes out of the cell pouch at the other end. The electrode lead may include a first electrode lead formed in the third side direction of the electrode assembly and a second electrode lead formed in the fourth side direction of the electrode assembly.

[0018] The sealing portion of the cell pouch formed on the outer side of the third side and the fourth side of the electrode assembly may be configured so as not to protrude outwardly beyond the flat surface of the cell pouch surrounding the first side of the electrode assembly with respect to the direction connecting the first side and the second side of the electrode assembly.

[0019] In addition, the present invention provides a battery pack comprising a plurality of battery cells according to the above-described embodiment and a support frame that accommodates the plurality of battery cells.

[0020] The support frame has a plurality of separated receiving spaces, and the plurality of battery cells can be accommodated in each of the plurality of receiving spaces.

[0021] In addition, the support frame may be formed in a shape with multiple "U" shapes attached.

[0022] The above-described battery pack may further include a heat dissipation member interposed between the support frame and the battery cell and in contact with the cell pouch that is in flat contact with the first side of the electrode assembly.

[0023] The above heat dissipation member can be made of a thermally conductive resin.

[0024] The above support frame can be made of metal material.

[0025] In addition, the battery pack described above may further include a pack case that accommodates the support frame accommodating the plurality of battery cells.

[0026] In addition, the present invention provides a vehicle comprising at least one battery pack according to the above-described embodiment.

[0027] In addition, the present invention provides a method for manufacturing a battery cell, comprising the steps of: providing an electrode assembly including a first plane and a second plane that are relatively wide and located opposite each other; a first side and a second side that connect the first plane and the second plane and are located opposite each other; and a third side and a fourth side that connect the first plane and the second plane and are located opposite each other and have a relatively smaller area than the first side and the second side; providing a pouch sheet having a pouch groove formed corresponding to the first side of the electrode assembly; inserting the first side of the electrode assembly into the pouch groove of the pouch sheet, and then wrapping the electrode assembly with the pouch sheet such that one side of the pouch sheet contacts the first plane of the electrode assembly and the other side of the pouch sheet contacts the second plane of the electrode assembly; and, in the direction of the second side, the third side, and the fourth side of the electrode assembly, the edge of the one side of the pouch sheet contacting the first plane of the electrode assembly and the edge of the other side of the pouch sheet contacting the second plane of the electrode assembly A method for manufacturing a battery cell is provided, comprising the step of forming a cell pouch by mutually bonding them.

[0028] At this time, the first plane, the second plane, and the first side of the electrode assembly can each be in close contact with the cell pouch.

[0029] According to the present invention, the thermal resistance can be reduced by minimizing the empty space between the electrode assembly and the cell pouch, and cooling performance can be improved by evenly forming at least one side of the battery cell.

[0030] However, the effects obtainable through the present invention are not limited to those described above, and other unmentioned technical effects will be clearly understood by a person skilled in the art from the description of the invention below.

[0031] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings.

[0032] FIG. 1 is a perspective view of a battery cell according to one embodiment of the present invention.

[0033] Figure 2 is a front view of the battery cell of Figure 1.

[0034] Figure 3 is an enlarged view of a part of the battery cell of Figure 1.

[0035] Figure 4 is a diagram illustrating the battery cell manufacturing method of Figure 1.

[0036] Figure 5 is a drawing showing a battery pack including a plurality of battery cells of Figure 1.

[0037] FIGS. 6 and FIGS. 7 are drawings showing the arrangement of the support frame, heat dissipation member, and battery cell used in the battery pack of FIGS. 5.

[0038] FIG. 8 is a drawing for explaining a vehicle including at least one battery pack of FIG. 5.

[0039] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely 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, and the present invention is defined only by the scope of the claims. Accordingly, in some embodiments, well-known process steps, well-known device structures, and well-known techniques are not specifically described to avoid the present invention being interpreted ambiguously. Throughout the specification, like reference numerals refer to like components.

[0040] In drawings, thicknesses may be enlarged to clearly represent multiple layers and regions. Throughout the specification, the same reference numerals are used for similar parts. When a part such as a layer, film, region, or plate is described as being "above" another part, this includes not only cases where it is "immediately above" another part, but also cases where there is another part in between. Conversely, when a part is described as being "immediately above" another part, it may mean that there is no other part in between. Furthermore, when a part such as a layer, film, region, or plate is described as being "below" another part, this includes not only cases where it is "immediately below" another part, but also cases where there is another part in between. Conversely, when a part is described as being "immediately below" another part, it may mean that there is no other part in between.

[0041] Throughout the specification, unless specifically stated otherwise, each component may be singular or plural.

[0042] A battery cell (101) according to one embodiment of the present invention is described with reference to FIGS. 1 and FIGS. 2.

[0043] FIG. 1 is a perspective view of a battery cell according to one embodiment of the present invention, and FIG. 2 is a front view of the battery cell.

[0044] Referring to FIGS. 1 and FIGS. 2, a battery cell (101) according to one embodiment of the present invention includes an electrode assembly (110) and a cell pouch (150).

[0045] In addition, a battery cell (101) according to one embodiment of the present invention may further include an electrode lead (120).

[0046] The battery cell (101) may be, for example, a pouch-type battery cell. The number of pouch-type battery cells stacked per unit area can be maximized.

[0047] Additionally, the battery cell (101) corresponds to a basic unit for charging and discharging, and, for example, a pouch-type battery cell can be manufactured by housing an electrode assembly (110) and an electrolyte material inside a cell pouch (150) made of a laminate film containing a soft metal, and sealing the cell pouch (150). In this case, the electrode assembly (110) can be manufactured by interposing a separator between a positive plate and a negative plate.

[0048] The electrode assembly (110) includes a first plane and a second plane located opposite each other and relatively wide, and a plurality of sides connecting the edges of the first plane and the second plane. For example, the first plane may be a plane in the X-axis direction and the second plane may be a plane in the -X-axis direction.

[0049] Additionally, a plurality of sides of the electrode assembly (110) may include a first side and a second side located opposite each other, connecting the edges of a first plane and a second plane, and a third side and a fourth side located opposite each other, connecting the edges of a first plane and a second plane, and having a relatively smaller area than the first side and the second side. For example, the first side may be a side in the -Z axis direction, and the second side may be a side in the Z axis direction. The third side may be a side in the Y axis direction, and the fourth side may be a side in the -Y axis direction.

[0050] That is, the first plane and the second plane of the electrode assembly (110) are wide and flat surfaces, and the first side, the second side, the third side, and the fourth side may be sides connecting the first plane and the second plane at the edge.

[0051] The cell pouch (150) wraps the electrode assembly (110) and can be in close contact with the first plane and the second plane of the electrode assembly (110) and any one of the multiple sides.

[0052] Specifically, the cell pouch (150) can be in close contact flatly with the first side among the multiple sides of the electrode assembly (110). That is, the cell pouch (150) and the first side of the electrode assembly (110) can be in close contact with each other without any gap between them.

[0053] Additionally, the cell pouch (150) may include a sealing portion (158) formed by mutually joining the edge of one side of the cell pouch (150) in contact with the first plane of the electrode assembly (110) and the edge of the other side of the cell pouch (150) in contact with the second plane of the electrode assembly (110) in the direction of the second side, the third side, and the fourth side of the electrode assembly (110).

[0054] In this way, the cell pouch (150) is in close contact with the first plane, the second plane, and the first side of the electrode assembly (110), and in the directions of the second side, the third side, and the fourth side of the electrode assembly (110), the edge of one side in contact with the first plane of the electrode assembly (110) and the edge of the other side in contact with the second plane of the electrode assembly (110) are joined together to form a sealing portion (158), thereby sealing the electrode assembly (110).

[0055] Meanwhile, the sealing portion (158) of the cell pouch (150) formed on the second side direction of the electrode assembly (110) can be fixed by a fixing tape (180) after being folded. In this way, by folding and fixing a part of the sealing portion (158) with the fixing tape (180), it is possible to prevent wasting space and suppress damage to the sealing portion (158).

[0056] The electrode lead (120) may include one end connected to the electrode assembly (110) and the other end protruding out of the cell pouch (150).

[0057] For example, the electrode lead (120) may include a first electrode lead (121) formed in the third side direction of the electrode assembly (110) and a second electrode lead (122) formed in the fourth side direction of the electrode assembly (110). That is, the first electrode lead (121) may protrude outward through the sealing portion (158) of the cell pouch (150) in the third side direction of the electrode assembly (110), and the second electrode lead (122) may protrude outward through the sealing portion (158) of the cell pouch (150) in the fourth side direction of the electrode assembly (110).

[0058] Referring to FIG. 3, the sealing portion (158) of the cell pouch (150) formed on the outer side of the third and fourth sides of the electrode assembly (110) can be configured so as not to protrude outward from the flat surface of the cell pouch (150) surrounding the first side of the electrode assembly (110) with respect to the direction connecting the first side and the second side of the electrode assembly (110). That is, the sealing portion (158) of the cell pouch (150) formed on the outer side of the third and fourth sides of the electrode assembly (110) is located inside the first side of the electrode assembly (110) by the space indicated by d1 in FIG. 3.

[0059] According to this configuration, the empty space between the electrode assembly (110) and the cell pouch (150) is minimized to reduce thermal resistance and at least one side of the battery cell (101) is evenly formed to improve cooling performance.

[0060] Specifically, the battery cell (101) can minimize the gap by bringing the first plane, the second plane, and the first side of the electrode assembly (110) into close contact with the cell pouch (150), and can improve the cooling efficiency of the battery cell by bringing the heat dissipation member (400) into contact with the cell pouch (150) that is in close contact with the first side of the electrode assembly (110).

[0061] Hereinafter, a method for manufacturing a battery cell (101) according to an embodiment of the present invention will be described with reference to FIG. 4.

[0062] First, an electrode assembly (110) is provided. The electrode assembly (110) can be manufactured by interposing a separator between an anode plate and a cathode plate. Additionally, a first electrode lead (121) can be connected to the anode plate, and a second electrode lead (122) can be connected to the cathode plate.

[0063] Additionally, the electrode assembly (110) includes a first plane and a second plane that are relatively wide and located opposite each other, a first side and a second side that connect the first plane and the second plane and are located opposite each other, and a third side and a fourth side that connect the first plane and the second plane and are located opposite each other and have a relatively smaller area than the first side and the second side.

[0064] For example, the first plane may be a plane in the X-axis direction, and the second plane may be a plane in the -X-axis direction. The first side may be a plane in the -Z-axis direction, and the second side may be a plane in the Z-axis direction. The third side may be a plane in the Y-axis direction, and the fourth side may be a plane in the -Y-axis direction.

[0065] Next, a pouch sheet (156) is provided, having a pouch groove (159) formed therein corresponding to the first side of the electrode assembly (110). That is, the pouch groove (159) may have a width corresponding to the thickness of the first side of the electrode assembly (110) and a length corresponding to the length of the first side. Additionally, the bottom surface of the pouch groove (159) may be formed flat so as to be in close contact with the first side of the electrode assembly (110). For example, the pouch groove (159) may be formed in the center in a shape that bisects the pouch sheet (156).

[0066] Next, after inserting the first side of the electrode assembly (110) into the pouch groove (159) of the pouch sheet (156), the pouch sheet (156) is folded to wrap the electrode assembly (110) such that one side of the pouch sheet (156) contacts the first plane of the electrode assembly (110) and the other side of the pouch sheet (156) contacts the second plane of the electrode assembly (110).

[0067] Next, the edge of one side of the pouch sheet (156) in contact with the first plane of the electrode assembly (110) and the edge of the other side of the pouch sheet (156) in contact with the second plane of the electrode assembly (110) are joined together in the direction of the second side, the third side, and the fourth side of the electrode assembly (110) to form a sealing portion (158).

[0068] When the sealing portion (158) is formed in this manner, a cell pouch (150) for sealing the electrode assembly (110) is completed. At this time, the first plane, the second plane, and the first side of the electrode assembly (110) can each be in close contact with the cell pouch (150) in a flat manner. That is, the cell pouch (150) and the first side of the electrode assembly (110) can be in close contact with each other without any gap between them.

[0069] Additionally, since the cell pouch (150) surrounds the electrode assembly (110) with the first side of the electrode assembly (110) inserted into the pouch groove (159), the sealing portion (158) of the cell pouch (150) formed on the outer side of the third and fourth sides of the electrode assembly (110) can be made so as not to protrude outwardly from the flat surface of the cell pouch (150) surrounding the first side of the electrode assembly (110) with respect to the direction connecting the first side and the second side of the electrode assembly (110). That is, the sealing portion (158) is sunken by d1 as previously shown in FIG. 3.

[0070] Next, the sealing portion (158) of the cell pouch formed in the second side direction of the electrode assembly (110) can be secured by a fixing tape (180) after being folded.

[0071] Additionally, the first electrode lead (121) may protrude outward by passing through the sealing portion (158) of the cell pouch (150) in the third side direction of the electrode assembly (110), and the second electrode lead (122) may protrude outward by passing through the sealing portion (158) of the cell pouch (150) in the fourth side direction of the electrode assembly (110).

[0072] According to the method for manufacturing a battery cell (101) according to one embodiment of the present invention, the empty space between the electrode assembly (110) and the cell pouch (150) is minimized to reduce thermal resistance, and at least one side of the battery cell (101) is formed evenly to improve cooling performance.

[0073] Specifically, the battery cell (101) can minimize the gap by bringing the first plane, the second plane, and the first side of the electrode assembly (110) into close contact with the cell pouch (150), and the cooling efficiency of the battery cell can be improved by bringing the heat dissipation member (400) into contact with the cell pouch (150) that is in close contact with the first side of the electrode assembly (110).

[0074] Hereinafter, a battery pack (10) including a battery cell (101) according to an embodiment of the present invention will be described with reference to FIGS. 5 to 7.

[0075] The battery pack (10) includes a plurality of battery cells (101) according to one embodiment of the present invention as described above, and a support frame (600) that accommodates the plurality of battery cells (101).

[0076] Additionally, the battery pack (10) may further include a heat dissipation member (400) and a pack case (500).

[0077] The support frame (600) has a plurality of separated receiving spaces, and a plurality of battery cells (101) can each be received in the plurality of receiving spaces of the support frame (600). For example, the support frame (600) can be formed in a shape with multiple "U" shapes attached together.

[0078] In addition, the support frame (600) can be made of a metal material that has excellent thermal conductivity and high strength.

[0079] A heat dissipation member (400) is interposed between a support frame (600) and a battery cell (101) to transfer heat from the battery cell (101) to the support frame (600). At this time, the heat dissipation member (400) may be positioned to contact a cell pouch (150) that is in close contact with the first side of the electrode assembly (110).

[0080] Since the first side of the electrode assembly (110) and the cell pouch (150) are in close contact without any gaps, when the heat dissipation member (400) contacts the cell pouch (150) that is in close contact with the first side of the electrode assembly (110), the cooling efficiency can be maximized compared to when the cell pouch (150) is in contact from the other side direction of the electrode assembly (110).

[0081] Additionally, the heat dissipation member (400) may be a thermal resin. Accordingly, the heat dissipation member (400) can effectively dissipate heat generated in the battery cell (101).

[0082] In addition, the heat dissipation member (400) made of a thermally conductive resin can also perform the role of fixing the battery cell (101) within the receiving space of the support frame (600).

[0083] The pack case (500) can accommodate a support frame (600) that accommodates a plurality of battery cells (101) inside. For example, the pack case (500) may include a lower case (520) and an upper case (510) coupled to the upper side of the lower case (520).

[0084] Additionally, the battery pack (10) can accommodate a plurality of battery cells (101) inside a pack case (500) and may include various control and protection systems such as a battery management system (BMS), a battery disconnect unit (BDU), and a cooling system.

[0085] For example, a battery management system (BMS) can control the charging and discharging of a battery pack (10). Specifically, the battery management system may be configured to control the charging and discharging operation or data transmission and reception operation of a battery cell (101) overall. The battery management system may be configured to control the charging and discharging state, power state, and performance state of the battery cell (101) through the pack voltage and pack current. The battery management system may estimate the state of the battery cell (101) within the battery pack (10) and manage the battery pack (10) using the estimated state information. For example, it may estimate and manage state information of the battery pack (10), such as the State of Charge (SOC), State of Health (SOH), maximum input / output power allowance, and output voltage of the battery pack (10). Furthermore, it may be possible to control the charging or discharging of the battery pack (10) using this state information, and furthermore, estimate the replacement time of the battery pack (10).

[0086] A battery disconnect unit (BDU) may be configured to control the electrical connection of battery cells (101) to manage the power capacity and function of a battery pack (10). To this end, the battery disconnect unit may include a power relay, a current sensor, a fuse, etc. As the battery disconnect unit is a configuration provided to the pack unit, various disconnect units known at the time of filing of the present invention may be applied.

[0087] A battery pack (10) according to one embodiment of the present invention configured in this manner can be applied to various devices. Specifically, it can be applied to means of transportation such as electric bicycles, electric vehicles (1), and hybrid vehicles, or to an Energy Storage System (ESS), but is not limited thereto and can be applied to various devices capable of using secondary batteries.

[0088] FIG. 8 is a drawing for explaining a vehicle (1) including a battery pack (10).

[0089] Referring to FIG. 8, the vehicle (1) according to the present invention may include at least one battery pack (10) according to one embodiment of the present invention. The vehicle (1) according to one embodiment of the present invention may be, for example, an electric vehicle, a hybrid vehicle, or a plug-in hybrid vehicle, and includes a battery pack (10) according to one embodiment of the present invention. The vehicle (1) includes four-wheeled vehicles and two-wheeled vehicles. The vehicle (1) operates by receiving power from the battery pack (10) according to one embodiment of the present invention. In addition, the vehicle (1) according to the present invention may further include various other components included in the vehicle in addition to the battery pack (10). For example, the vehicle (1) according to the present invention may further include a vehicle body, a motor, an electronic control unit (ECU), etc., in addition to the battery pack (10) according to the present invention.

[0090] Meanwhile, although terms indicating direction such as up and down have been used in this specification, these terms are used merely for convenience of explanation, and it is obvious to a person skilled in the art that they may vary depending on the location of the object or the position of the observer.

[0091] Although the present invention has been described above by limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical spirit of the present invention and the equivalent scope of the claims described below by those skilled in the art to which the present invention belongs.

[0092] < Explanation of Symbols >

[0093] 1: Car

[0094] 10: Battery pack

[0095] 101: Battery cell

[0096] 110: Electrode assembly

[0097] 120: Electrode lead

[0098] 121: First electrode lead

[0099] 122: Second electrode lead

[0100] 150: Cell Pouch

[0101] 156: Pouch Sheet

[0102] 158: Sealing part

[0103] 159: Pouch Home

[0104] 180: Fixing tape

[0105] 400: Heat dissipation component

[0106] 500: Pack Case

[0107] 510: Upper case

[0108] 520: Lower case

[0109] 600: Support Frame

[0110] The present invention can be used to provide a battery cell having a gap between the electrode assembly and the cell pouch minimized and at least one side evenly formed, a battery pack including the same, and an automobile.

Claims

1. An electrode assembly comprising a first plane and a second plane that are relatively wide and located opposite each other, and a plurality of sides connecting the edges of the first plane and the second plane; A cell pouch that surrounds the electrode assembly and is in flat contact with the first plane and the second plane of the electrode assembly and any one of the plurality of sides. A battery cell containing 2. In Paragraph 1, The plurality of sides of the electrode assembly are, A first side and a second side located opposite each other, connecting the edges of the first plane and the second plane; A third side and a fourth side that connect the edges of the first plane and the second plane, are located on opposite sides, and have a relatively smaller area than the first side and the second side. A battery cell characterized by including 3. In Paragraph 2, A battery cell characterized in that the cell pouch is in flat contact with the first side of the electrode assembly.

4. In Paragraph 2, A battery cell characterized in that the cell pouch comprises a sealing portion formed by mutually joining the edge of one side of the cell pouch in contact with the first plane of the electrode assembly and the edge of the other side of the cell pouch in contact with the second plane in the direction of the second side, the third side, and the fourth side of the electrode assembly.

5. In Paragraph 2, It further includes an electrode lead that is connected to the electrode assembly at one end and protrudes out of the cell pouch at the other end, The above electrode lead is, A first electrode lead formed in the third side direction of the electrode assembly; A second electrode lead formed in the fourth side direction of the electrode assembly. A battery cell characterized by including 6. In Paragraph 4, A battery cell characterized in that the sealing portion of the cell pouch formed on the outer side of the third side and the fourth side of the electrode assembly does not protrude outwardly from the flat surface of the cell pouch surrounding the first side of the electrode assembly with respect to the direction connecting the first side and the second side of the electrode assembly.

7. A plurality of battery cells as described in any one of paragraphs 2 through 6; and A support frame accommodating the above plurality of battery cells A battery pack including 8. In Paragraph 7, The above support frame has a plurality of separated receiving spaces, and A battery pack characterized in that the plurality of battery cells are each accommodated in the plurality of receiving spaces.

9. In Paragraph 7, A battery pack characterized by the above-mentioned support frame being formed in a shape with multiple "U" shapes attached.

10. In Paragraph 7, A battery pack characterized by further including a heat dissipation member interposed between the support frame and the battery cell and in contact with the cell pouch that is flatly in close contact with the first side of the electrode assembly.

11. In Paragraph 10, A battery pack characterized in that the above-mentioned heat dissipation member is made of a thermally conductive resin.

12. In Paragraph 10, A battery pack characterized in that the above-mentioned support frame is made of a metal material.

13. In Paragraph 7, A battery pack characterized by further including a pack case that accommodates the support frame accommodating the plurality of battery cells.

14. An automobile comprising at least one battery pack as described in paragraph 7.

15. A step of providing an electrode assembly comprising a first plane and a second plane that are relatively wide and located opposite each other, a first side and a second side that connect the first plane and the second plane and are located opposite each other, and a third side and a fourth side that connect the first plane and the second plane, are located opposite each other, and have a relatively smaller area than the first side and the second side; A step of providing a pouch sheet having a pouch groove formed corresponding to the first side of the electrode assembly; A step of inserting the first side of the electrode assembly into the pouch groove of the pouch sheet, and then wrapping the electrode assembly with the pouch sheet such that one side of the pouch sheet contacts the first plane of the electrode assembly and the other side of the pouch sheet contacts the second plane of the electrode assembly; and A step of forming a cell pouch by mutually joining the edge of one side of the pouch sheet in contact with the first plane of the electrode assembly and the edge of the other side of the pouch sheet in contact with the second plane of the electrode assembly in the directions of the second side, the third side, and the fourth side of the electrode assembly. A method for manufacturing a battery cell including 16. In Paragraph 15, A method for manufacturing a battery cell characterized in that the first plane, the second plane, and the first side of the electrode assembly are each in flat contact with a cell pouch.

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