Soft package type battery cell and vehicle comprising same

Abstract

Disclosed are a pouch-type battery cell and a vehicle including the same, the pouch-type battery cell being thicker and thus having improved durability and stability while maintaining moldability and insulating properties of a pouch, and a vehicle including the same. The battery cell includes: an electrode assembly formed by overlapping a plurality of electrodes; the packaging material is packaged to wrap the periphery of the electrode assembly so as to form a cuboid-shaped soft package; a sealing portion formed by contacting overlapping edges of the folded encapsulation material with the electrode assembly therebetween with each other; and a pair of leads, one end portion of which is connected to the plurality of electrodes inside the encapsulation material, and the other end portion of which is exposed to the outside of the encapsulation material. The pair of leads is exposed in the same direction.

Description

Technical Field

[0001] This disclosure relates to a pouch-type battery cell and a vehicle including the pouch-type battery cell, the pouch-type battery cell being thicker, thus having improved durability and stability, while maintaining the formability and insulation properties of the pouch. Background Technology

[0002] Recently, technologies for reducing carbon emissions are being actively developed to address environmental problems such as abnormal temperatures. To reduce carbon emissions, it is necessary to generate energy in an eco-friendly manner instead of using fossil fuels, store the generated energy in the form of electricity, and use the stored electricity in vehicles, various industrial sites, and homes.

[0003] To reduce carbon emissions through the use of electricity, it is necessary to use batteries capable of storing and extracting electrical energy. Therefore, to ensure the efficient storage and use of electrical energy without inconvenience, battery performance must be guaranteed.

[0004] Batteries primarily utilize the redox reactions of metal ions. High-density metal ions are used to improve battery capacity, charge / discharge performance, and efficiency, and extensive research is underway on materials that constitute electrolytes and solid electrolytes. However, as battery performance improves, a decrease in stability is often encountered.

[0005] Meanwhile, cylindrical, prismatic, and pouch cells are widely used. Cylindrical cells have a simple structure, relatively low manufacturing cost, high mechanical strength, and excellent heat dissipation. However, they are inefficient in terms of space utilization and may be limited in applications requiring high energy density. Prismatic cells offer higher space utilization and can achieve large capacity and high energy density. However, they have complex manufacturing processes, are expensive, and pose a risk of casing deformation due to internal pressure.

[0006] To address these issues, pouch cells have recently garnered significant attention. Pouch cells offer advantages in achieving weight reduction and higher energy density through the use of flexible packaging materials. They also possess excellent structural flexibility, allowing for manufacturing in various shapes and simplifying the manufacturing process.

[0007] However, pouch cell batteries require improvements in durability and safety, particularly in voltage resistance and heat dissipation. The above description of the background technology is intended only to enhance understanding of the background technology of this disclosure and should not be construed as an admission that it corresponds to prior art known to those skilled in the art. Summary of the Invention

[0008] Technical issues

[0009] The purpose of this disclosure, made to address the aforementioned problems, is to provide a thicker pouch cell capable of maintaining formability and insulation properties, and a vehicle comprising the pouch cell.

[0010] The technical objectives to be achieved in this disclosure are not limited to those described above, and other technical objectives not mentioned will be clearly understood by those skilled in the art from the following description.

[0011] Technical solution

[0012] To achieve the above objectives, a battery cell according to this disclosure includes: an electrode assembly formed by overlapping a plurality of electrodes; an encapsulation material encapsulated to surround the electrode assembly to form a cuboid-shaped soft package; a seal formed by contacting the overlapping edges of the folded encapsulation material in which the electrode assembly is disposed to each other; and a pair of leads, one end of which is connected to the plurality of electrodes inside the encapsulation material, and the other end of which is exposed outside the encapsulation material. The pair of leads may be exposed in the same direction.

[0013] In the battery cell disclosed herein, the pair of leads can be arranged together in a cuboid shape on one surface of the pouch.

[0014] In the battery cell disclosed herein, the pair of leads may be disposed on the upper surface of the pouch, and the other end of the leads may protrude upward.

[0015] In the battery cell disclosed herein, the sealing portion can be bent to contact the upper and side surfaces of the soft pack.

[0016] In the battery cell disclosed herein, wings formed by folding encapsulating material can be provided on the top and bottom of the side surface of the pouch, and the wings can be bent to contact the side surface of the pouch.

[0017] In the battery cell disclosed herein, a pair of protrusions may be formed on the upper surface of the pouch, and the other end of the pair of leads may be exposed to the outside through the end of each of the protrusions.

[0018] In the battery cell disclosed herein, the sealing portion on the upper surface of the pouch can be bent in the horizontal direction, and the protrusion bends upward to form a platform structure.

[0019] In the battery cell disclosed herein, the pair of leads can be bent horizontally and then upward to form a platform structure.

[0020] In the battery cell disclosed herein, an insulating strip can be provided on the side surface of the pouch to fix the bending of the sealing portion and cover the sealing portion on the side surface of the pouch.

[0021] In the battery cell disclosed herein, wings formed by folding encapsulating material can be provided on the top and bottom of the side surface of the pouch. The wings can be bent to be located on the side surface of the pouch, and an insulating strip can be provided to cover the wings.

[0022] In the battery cell disclosed herein, the insulating tape can extend from the side surface of the pouch to the top surface of the pouch, cover the sealing portion on the top surface of the pouch, and fix the bend of the sealing portion.

[0023] In the battery cell disclosed herein, the insulating tape can cover the bent sealing portion on the upper surface of the pouch, thereby avoiding protrusions and connecting sealing portions.

[0024] In the battery cell disclosed herein, the pair of protrusions can be connected by a connecting seal while remaining spaced apart from each other. An insulating tape can cover the bent seal on the upper surface of the pouch, thereby avoiding the protrusions and the connecting seal.

[0025] In the battery cell disclosed herein, the insulating strip may extend to the lower surface of the pouch.

[0026] In the battery cell disclosed herein, the width of the insulating strip can be greater than the width of the sealing portion and less than the width of the side surface of the pouch.

[0027] In the battery cell disclosed herein, the height of the internal space of the pouch is greater than the height of the electrode assembly, and a gas pocket can be formed in the upper part of the internal space of the pouch.

[0028] The battery pack disclosed herein may include the individual battery cells disclosed herein.

[0029] The vehicle disclosed herein may include the battery pack disclosed herein.

[0030] Technical effect

[0031] According to this disclosure, while maintaining the formability and insulation properties of the pouch battery cell, the problem that the thickness of the pouch battery cell cannot exceed the maximum thickness (20 mm) of existing pouch battery cells can be solved, thereby providing a pouch battery cell that is thicker than the conventional maximum thickness and a vehicle including the pouch battery cell.

[0032] The effects obtained from this disclosure are not limited to those described above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. Attached Figure Description

[0033] Figure 1 This is a diagram illustrating a battery cell according to an embodiment of the present disclosure.

[0034] Figure 2This is a diagram used to illustrate the effect of the protrusion according to embodiments of the present disclosure.

[0035] Figure 3 This is a front view of a battery cell according to an embodiment of the present disclosure.

[0036] Figure 4 This is a top view of a battery cell according to an embodiment of the present disclosure.

[0037] Figure 5 This is a side view of a battery cell according to an embodiment of the present disclosure.

[0038] Figure 6 This is a bottom view of a battery cell according to an embodiment of the present disclosure.

[0039] Figure 7 It is along Figure 1 A sectional view taken by line A-A'.

[0040] Figure 8 This is a side view of the leads according to an embodiment of the present disclosure.

[0041] Figure 9 This is a diagram illustrating packaging materials according to an embodiment of the present disclosure.

[0042] Figures 10 to 13 This is a diagram illustrating the packaging of a battery cell according to an embodiment of the present disclosure.

[0043] Figure 14 This is a diagram illustrating a vehicle using a battery pack according to an embodiment of the present disclosure. Detailed Implementation

[0044] In the following description, detailed descriptions of known functions and configurations incorporated herein may be omitted where they might obscure the subject matter of this disclosure. The same reference numerals will be used in the accompanying drawings to refer to the same or similar parts. Furthermore, the drawings are intended only to facilitate an easy understanding of the embodiments disclosed in this specification, and the technical concepts disclosed in this specification are not limited to the drawings and should be understood to include all modifications, equivalents, or substitutions included within the spirit and scope of this disclosure.

[0045] For example, while terms such as “first” and “second” can be used to describe various elements, these terms are only used to distinguish identical or similar elements from one another. Unless the context clearly indicates otherwise, elements described in the singular are intended to include multiple elements.

[0046] In this specification, the terms "comprising" or "including" are intended to specify the presence of the described features, quantities, steps, operations, components, parts, or combinations thereof, but should be understood as not precluding the possibility of the presence or addition of one or more other features, quantities, steps, operations, components, parts, or combinations thereof. The suffixes "module" and "unit" used for elements in the following description are for ease of description and are therefore used interchangeably, without any distinguishing meaning or function.

[0047] When a component is "joined" or "connected" to another component, it should be understood that although the component can be directly joined or connected to the other component, a third component may exist between the two components. When a component is "directly joined" or "directly connected" to another component, it should be understood that there are no elements between the two components.

[0048] In the following description, the embodiments disclosed herein will be described in detail with reference to the accompanying drawings. Regardless of the reference numerals used, identical or similar parts will be given the same reference numerals, and redundant descriptions will be omitted.

[0049] Cylindrical, prismatic, and pouch cells are widely used as battery cells. Cylindrical cells have a simple structure, relatively low manufacturing cost, high mechanical strength, and excellent heat dissipation. However, they are inefficient in terms of space utilization and may be limited in applications requiring high energy density. Prismatic cells offer higher space utilization and can achieve large capacity and high energy density. However, they have a complex manufacturing process, are expensive, and are susceptible to casing deformation due to internal pressure.

[0050] To address these issues, pouch cell batteries have recently garnered significant attention. A pouch cell refers to a battery cell that includes electrodes and electrolytes within a flexible foil-like composite material made of metal and plastic. Pouch cells offer advantages in achieving weight reduction and higher energy density through the use of flexible encapsulation materials. They also possess excellent structural flexibility, allowing for manufacturing in various shapes and simplifying the manufacturing process. However, improvements in durability and safety are needed for pouch cells, particularly in terms of pressure resistance and heat dissipation.

[0051] Meanwhile, in the manufacturing process of pouch cell batteries, electrode assemblies including multiple electrodes are stacked within encapsulation material and then pressed. However, in this process, if the pressing exceeds a certain depth, the insulation at the top and bottom of the pouch is damaged, rendering the battery cell unable to perform its function. Additionally, the formability of the battery cell decreases. Therefore, it has historically been difficult to manufacture pouch cell batteries with a thickness exceeding a certain value (e.g., 16 mm).

[0052] However, when the pouch cell is thicker than a certain thickness, the distance between adjacent cells can be ensured, thereby delaying the time of heat and flame transfer generated from adjacent cells and improving the pressure resistance and heat dissipation performance of the pouch cell. Therefore, this disclosure provides a pouch cell with a thickness greater than a certain thickness (e.g., 16 mm) and a method for manufacturing the same. This disclosure relates to a pouch cell that, by having a thickness greater than a certain thickness, exhibits improved durability and stability while maintaining the formability and insulation properties of a pouch.

[0053] Specifically, a battery cell according to an embodiment of the present disclosure includes: an electrode assembly 100 formed by overlapping a plurality of electrodes; an encapsulation material 200 encapsulated to surround the electrode assembly 100 to form a cuboid-shaped soft package; a sealing portion 210 formed by contacting the overlapping edges of the folded encapsulation material 200, in which the electrode assembly 100 is disposed, to each other; and a pair of leads 300, one end of which is connected to a plurality of electrodes inside the encapsulation material 200, and the other end of the pair of leads is exposed outside the encapsulation material 200. The pair of leads 300 may be exposed in the same direction.

[0054] The thickness of the flexible package can be 16 mm or more, preferably 20 mm or more. The pair of leads can be configured in a platform structure. A "platform structure" can be defined as a structure in which a pair of leads is bent and then bent again in the horizontal direction to face upwards (i.e., in the vertical direction), such as... Figure 8 The structure of the lead wire is shown.

[0055] Reference Figure 1 The battery cell of this disclosure is further described. A pair of leads 300 may be disposed together on one surface of the pouch. A pair of leads 300 may be disposed on the upper surface of the pouch. One end of the pair of leads 300 may be located inside the pouch and may be soldered and connected to a plurality of electrode tabs 110 of the electrode assembly 100. The other end of the pair of leads 300 may be exposed to the outside of the pouch and may be exposed to the outside through a protrusion 230.

[0056] More specifically, a pair of leads 300 can be arranged in the same plane along the same direction, and the pair of leads 300 can be arranged facing upwards.

[0057] The overlapping edges of the encapsulation material 200 surrounding the electrode assembly 100 can contact each other to form a seal 210. This seal 210 ensures insulation of the battery cell. The seal 210 can be formed on the upper and side surfaces of the pouch. Furthermore, the seal 210 can be bent to contact the upper and side surfaces of the pouch, and the directions of contact between the seal 210 and the upper and side surfaces can be the same, ensuring that the seal 210 is not damaged. In addition to ensuring insulation through the seal 210, further enhanced insulation can be ensured through the bending or folding structure of the seal 210.

[0058] Furthermore, wings 205, formed by folding the encapsulation material 200, are provided on the top and bottom 203 of the side surface of the flexible package. The wings 205 can be extended along... Figure 1 The material 200 is formed by folding the dotted lines of the encapsulation material, as described below. The wing 205 can be bent to contact the side surface of the pouch. By bending the wing 205 to contact the side surface of the pouch, the bent wing 205 can cover the seal 210 to help maintain the seal of the seal 210 more stably. Furthermore, the wing 205 can contact the pouch as closely as possible to reduce the volume of the battery cell, thus increasing the energy density.

[0059] Furthermore, a pair of protrusions 230 are formed on the upper surface of the soft package. The pair of protrusions 230 can be spaced apart from each other. In addition, a connecting seal 211 can be formed between the spaced-apart protrusions 230. The pair of protrusions 230 can be connected by the connecting seal 211 while they are spaced apart from each other.

[0060] The sealing portion 210 on the upper surface of the flexible package can be bent horizontally to contact the upper surface of the flexible package. The protrusion 230 can be bent upward to form a platform structure. In addition, a pair of leads 300 exposed to the outside through one end of the protrusion 230 can be bent horizontally, and the other end exposed to the outside can be bent upward to form a platform structure.

[0061] In this configuration, if the sealing portion 210 bends to contact the upper surface of the soft package and the protrusions 230 do not bend upwards, then the pair of protrusions 230 and the pair of leads 300 can be arranged horizontally facing each other instead of facing upwards, as shown below. Figure 2 As shown. If pouch cell cells with this structure are stacked horizontally, interference may occur between a pair of leads 300 between adjacent cells. Therefore, the cell of this disclosure, in which the protrusion 230 is bent upwards, prevents interference between adjacent cells, and when they face the same direction (e.g., upwards), the pair of leads 300 can be melted without additional position switching. This simplifies the manufacturing process and reduces costs.

[0062] The side surface of the soft package may be provided with bends for fixing the sealing part 210, folds for fixing the wing part 205, and insulating tape 400 for covering the sealing part 210.

[0063] like Figure 1 as well as Figures 4 to 6 As shown, the insulating tape 400 can extend from the side surface of the flexible package to the top or bottom surface of the flexible package. With this structure, the insulating tape 400 can cover the bent sealing portion 210 to fix the bend of the sealing portion 210, increase the contact area between the flexible package and the insulating tape 400 to improve the adhesive strength of the insulating tape 400, and maintain the shape of the flexible package.

[0064] Figure 3 This is a front view of a single battery cell according to this disclosure. Figure 3 As shown, the insulating tape 400 may not be provided on the front side of the soft package. In addition, the protrusion 230 may be bent to face upward, and a pair of leads 300 may be configured such that they protrude outward through the ends of the protrusion 230 and face upward.

[0065] Figure 4 This is a top view of the battery cell disclosed herein. (See image.) Figure 4 As shown, a pair of protrusions 230 can be arranged spaced apart from each other. A connecting seal 211 can be formed between the pair of protrusions 230. The insulating tape 400 can be arranged to extend from the side surface of the pouch to the top surface of the pouch and cover a portion of the top surface. More specifically, the connecting seal 211 between the pair of protrusions 230 can be configured to avoid the location where the protrusions 230 are formed. With this structure, venting can be achieved through the connecting seal 211, which is not covered by the insulating tape 400 and therefore has a relatively weak seal, rather than through the side surface or a portion of the top surface of the pouch that is doubly covered by the sealing portion 210 and the insulating tape 400. Therefore, venting can be achieved on the top surface of the pouch.

[0066] Figure 5 This is a side view of a single battery cell disclosed herein. (As shown) Figure 5 As shown, the wings 205 located at the top and bottom 203 of the side surface of the flexible package can be folded to contact the side surface of the flexible package. The insulating tape 400 can be placed on the side surface of the flexible package, simultaneously covering the sealing portion 210 and the wings 205. With this structure, the insulating tape 400 can cover the sealing portion 210 while simultaneously securing the bending of the sealing portion 210 and the folding of the wings 205, thereby maintaining a more effective seal.

[0067] Meanwhile, the width of the insulating strip 400 can be greater than the width of the sealing portion 210, and the width of the insulating strip 400 can be less than the width of the side portion of the pouch. With this structure, the insulating strip 400 can effectively cover and protect the sealing portion 210 from external influences, while minimizing the excessive increase in the area of ​​the insulating strip 400 that would hinder heat dissipation from the battery cells. Furthermore, by preventing the insulating strip 400 from being placed on the front side 201 of the pouch, when the battery cells of this disclosure are stacked in the module or battery pack housing 10, the sealing portion 210 is not located on the front side of the pouch that contacts adjacent battery cells, thereby minimizing unnecessary space waste.

[0068] Figure 7 It is along Figure 1 The sectional view taken along line A-A'. (Refer to...) Figure 7 Describes the internal space of the pouch cell of the battery cell disclosed herein. For example... Figure 7 As shown, the electrode assembly 100 can be placed within the internal space of a pouch formed by folding the encapsulation material 200. For example, the height of the internal space of the pouch can be greater than the height of the electrode assembly 100, thus forming a gas space 130 in the upper part of the internal space of the pouch. The gas space 130 can primarily be used to contain the gas and heat generated from the battery cell, and can effectively prevent and delay the degradation of the battery cell by protecting the electrode terminals 110 and one end of the leads 300 connected thereto from external impacts.

[0069] One end of the lead 300 can be electrically connected to the electrode terminals 110 of the plurality of electrodes included in the electrode assembly 100. For example, one end of a pair of leads 300 can be electrically connected to the electrode terminals 110 by soldering. One end of a pair of leads 300 can be located within the internal space of the flexible package. For example, one end of a pair of leads 300 can be located inside the gas space 130.

[0070] One end of the pair of leads 300 can be configured to face the electrode assembly 100. For example, one end of the pair of leads 300 can extend downward toward the electrode assembly 100 from the upper part of the interior space of the flexible package or gas space 130, or it can extend vertically. The other end of the pair of leads 300 can be bent upward and exposed to the outside of the flexible package. The space between one end and the other end of the lead pair 300 can extend horizontally, thereby forming the platform structure described above.

[0071] Reference Figures 9 to 12 The manufacture and packaging of a battery cell according to embodiments of the present disclosure are described. Figure 9This is a diagram illustrating the encapsulation material 200 according to an embodiment of the present disclosure. A pair of protrusions 230 may be formed spaced apart from each other at the upper end of the encapsulation material 200. A pair of protrusions 230 may also be formed spaced apart from each other at the lower end of the encapsulation material 200. The width and height of the protrusions 230 formed at the upper end of the encapsulation material 200 may be the same as the width and height of the protrusions 230 formed at the lower end of the encapsulation material 200. In addition, the distance between the pair of protrusions 230 formed at the upper end of the encapsulation material 200 may be the same as the distance between the pair of protrusions 230 formed at the lower end of the encapsulation material 200. With this structure, when the electrode assembly 100 is wrapped in the encapsulation material 200 by folding the encapsulation material 200, the protrusions 230 formed at the upper and lower ends of the encapsulation material 200 may correspond to each other.

[0072] Additionally, the encapsulation material 200 may include: a pair of front portions 201, which may face each other when the encapsulation material 200 is bent to cover the front and rear portions of the electrode assembly 100, with the electrode assembly 100 located between the pair of front portions 201; and a lower portion 203, formed between the pair of front portions 201 to cover the bottom of the electrode assembly 100. Furthermore, when the encapsulation material 200 is bent to form a flexible package, it can be folded along... Figure 9 The dotted lines fold the encapsulation material 200 to form the wing 205.

[0073] The encapsulation material 200 is encapsulated to wrap around the electrode assembly 100, and the overlapping edges of the encapsulation material 200 contact each other to form a seal 210. Additionally, the seal 210 can be bent and contact the upper or side surface of the pouch. With this structure, the seal 210 can effectively seal the interior of the pouch to ensure insulation.

[0074] Meanwhile, the sealing portion 210 can be formed at all overlapping edges of the encapsulation material 200. However, since a pair of leads 300 can be exposed to the outside of the soft package through the end of the protrusion 230, the sealing portion 210 can be formed by avoiding the end of the protrusion 230.

[0075] Reference Figures 10 to 13 The process of encapsulating a battery cell according to an embodiment of the present disclosure is described. The electrode assembly 100 may be configured such that the bottom of the electrode assembly is located below the encapsulation material 200. For example... Figure 10 As shown, the pair of front portions 201 of the encapsulation material 200 can be configured to face each other while covering the electrode assembly 100, so that the overlapping edges of the encapsulation material 200 can contact each other, thereby forming a sealing portion 210 on the upper surface of the flexible package. The sealing portion 210 can be bent to contact the upper surface of the flexible package. In addition, the sealing portion 210 on the upper surface of the flexible package can be bent horizontally, and the protrusion 230 can be bent upward to form the aforementioned platform structure.

[0076] Subsequently, the sides of the encapsulation material 200 can be folded along the horizontal direction B, so that the encapsulation material 200 can be packaged as follows: Figure 11 The shape shown. During this process, a sealing portion 210 can also be formed on the side surface of the flexible package. Additionally, the encapsulation material 200 can be folded to form wings 205 at the top and bottom of the side surface of the flexible package. Then, the wings 205 can be folded along the vertical direction C of the flexible package, so that the encapsulation material 200 can be encapsulated as shown. Figure 12 The shape shown.

[0077] Afterwards, the insulating tape 400 can be placed on the soft package, such as... Figure 13 As shown. The insulating tape 400 can secure the bent portion 205 that contacts the flexible package, and can also secure the bent portion 210 that contacts the upper or side surface of the flexible package. Furthermore, the width of the insulating tape 400 can be greater than the width of the sealing portion 210 and less than the width of the side portion of the flexible package. Additionally, the insulating tape 400 can extend to the lower or upper surface of the flexible package, thus increasing the adhesive strength of the insulating tape 400.

[0078] In the manner described above, the encapsulation material 200 of this disclosure can be formed into a soft pack of battery cells. However, this is an example and is not necessarily limited to the above sequence. For example, in placing... Figure 13 After the insulating tape 400, the protrusion 230 can be bent to face upwards.

[0079] Figure 14 This is a diagram illustrating a vehicle using a battery pack according to an embodiment of the present disclosure. Referring to this diagram, the battery pack according to an embodiment of the present disclosure can be applied to battery packs BP of various vehicles V (e.g., internal combustion engine vehicles, electric vehicles, hybrid vehicles, and fuel cell vehicles), such as... Figure 14 As shown, it can also be applied to battery packs in various fields (e.g., industrial energy storage systems (ESS), residential ESS), and small battery packs).

[0080] Although specific embodiments of the present disclosure have been shown and described, it will be apparent to those skilled in the art that the present disclosure may be modified and altered in various ways without departing from the technical spirit of the present disclosure as defined by the appended claims.

Claims

1. A single battery cell, comprising: An electrode assembly formed by overlapping a plurality of electrodes; An encapsulation material is encapsulated to surround the electrode assembly to form a cuboid soft package; A sealing portion is formed by contacting the overlapping edges of the folded encapsulation material in which the electrode assembly is disposed therebetween. as well as A pair of leads, one end of which is connected to a plurality of electrodes inside the encapsulation material, and the other end of which is exposed outside the encapsulation material. The pair of leads are exposed in the same direction.

2. The battery cell according to claim 1, wherein, The pair of leads are disposed together on one surface of the flexible package.

3. The battery cell according to claim 2, wherein, The pair of leads are disposed on the upper surface of the flexible package, and the other end of the pair of leads protrudes upward.

4. The battery cell according to claim 1, wherein, The sealing part is bent to contact the upper and side surfaces of the soft package.

5. The battery cell according to claim 1, wherein, Wings formed by folding the packaging material are provided at the top and bottom of the side surface of the flexible package. The wing is bent to contact the side surface of the soft package.

6. The battery cell according to claim 1, wherein, A pair of protrusions are formed on the upper surface of the soft package, and the other ends of the pair of leads are exposed to the outside through the ends of the respective protrusions.

7. The battery cell according to claim 6, wherein, The sealing portion on the upper surface of the soft package is bent horizontally and the protrusion is bent upward to form a platform structure, and the pair of leads are bent horizontally and then bent upward to form a platform structure.

8. The battery cell according to claim 6 further includes an insulating tape disposed on the side surface of the pouch to fix the bending of the sealing portion and cover the sealing portion on the side surface of the pouch.

9. The battery cell according to claim 8, wherein, Wings formed by folding the packaging material are provided at the top and bottom of the side surface of the flexible package. The wings are bent to be located on the side surface of the flexible package, and the insulating tape is configured to cover the wings.

10. The battery cell according to claim 8, wherein, The insulating tape extends from the side surface of the soft package to the top surface of the soft package, covers the sealing portion of the top surface of the soft package, and fixes the bend of the sealing portion.

11. The battery cell according to claim 10, wherein, The pair of protrusions are connected by a connecting seal while being spaced apart from each other, and the insulating tape covers the bent seal on the upper surface of the soft package, avoiding the location where the protrusions are formed and the connecting seal.

12. The battery cell according to claim 8, wherein, The insulating tape extends to the lower surface of the soft package, and the width of the insulating tape is greater than the width of the sealing portion and less than the width of the side surface of the soft package.

13. The battery cell according to claim 1, wherein, The height of the internal space of the soft package is greater than the height of the electrode assembly, and a gas space is formed in the upper part of the internal space of the soft package.

14. A battery pack comprising the battery cell of claim 1.

15. A vehicle comprising the battery pack of claim 14.

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