Apparatus for sealing pouch-type battery cell with easy position alignment and method for sealing pouch-type battery cell using same

Abstract

The present invention relates to an apparatus for sealing a pouch-type battery cell with easy position alignment and a method for sealing a pouch-type battery cell using the same, and more particularly, to an apparatus for sealing a pouch-type battery cell with easy position alignment and a method for sealing a pouch-type battery cell using the same, the apparatus comprising: a seating jig for seating a pouch-type battery cell; a seating jig on which a pouch-type battery cell is seated, the pouch-type battery cell being provided with an insulating film and an electrode lead positioned at the sealing portion of the pouch case; a pressing unit for forming a guide hole in each of the sealing portion, the electrode lead, and the insulating film; and a pair of sealing means for sealing the sealing portion, in which the sealing means have a guide protrusion formed on a surface facing the sealing portion.

Description

Technical Field

[0001] This application claims the benefit of priority to Korean Patent Application No. 2024-0044455, filed on April 2, 2024, and Korean Patent Application No. 2024-0143639, filed on October 21, 2024, the disclosures of which are incorporated herein by reference in their entirety.

[0002] This invention relates to a pouch cell sealing device for easy positioning and a pouch cell sealing method using the pouch cell sealing device, and more specifically, to a pouch cell sealing device for easy positioning that prevents incorrect sealing positioning, such as the electrode leads and insulating film in the sealing portion of the pouch cell deviating from their fixed positions during sealing, and a pouch cell sealing method using the pouch cell sealing device. Background Technology

[0003] With the latest developments in alternative energy sources due to air pollution and energy depletion caused by the use of fossil fuels, the demand for secondary batteries capable of storing the generated electrical energy is increasing.

[0004] Due to the increased use and complexity of mobile devices, as well as the development of electric vehicles, the required capacity of secondary batteries for powering various electronic devices that are unavoidable in modern society has increased. To meet user needs, multiple battery cells are incorporated into small devices, while battery modules or battery packs comprising multiple battery cells electrically connected to each other are used in vehicles and other applications.

[0005] Meanwhile, during the manufacturing process of the pouch-type battery cell, the electrode assembly is received in a pouch-shaped box, the electrolyte solution is injected into the pouch-shaped box, and the edges of the pouch-shaped box are heated and pressed to form a sealed portion. At this time, the electrode lead and the insulating film can be located in the sealed portion. One side of the electrode lead is connected to the electrode tab of the electrode assembly, and the other side of the electrode lead protrudes outward from the pouch-shaped box, with the insulating film located between the sealed portion and the electrode lead.

[0006] Figure 1 This is a side view showing a conventional battery box sealing device. (As shown) Figure 1 As shown, the conventional battery box sealing device 10 includes a primary sealing unit 11 and a secondary sealing unit 12 configured to seal using pressure and temperature, as well as a conveying unit 13 configured to convey the battery box.

[0007] The primary sealing unit 11 and the secondary sealing unit 12 apply pressure and temperature to the edges of the battery box conveyed by the conveying unit 13 to form a sealed portion.

[0008] At this point, electrode leads configured to electrically connect the electrode assembly to an external device and an insulating film configured to maintain insulation between the battery box and the electrode leads can be located in the sealed portion.

[0009] The electrode leads and insulating film may be in a fixed position when placed in the sealing section, but may shift during the sealing process, which may result in incorrect seal positioning.

[0010] (Existing technical documents)

[0011] (Patent Document 1) Korean Patent Application Publication No. 2023-0094176 Summary of the Invention

[0012] Technical issues

[0013] The present invention was made in view of the above problems, and the object of the present invention is to provide a pouch-type battery cell sealing device that is easy to position and a pouch-type battery cell sealing method using the pouch-type battery cell sealing device. The pouch-type battery cell sealing device can align the positions of the electrode leads and insulating film located in the sealing part when sealing the pouch-shaped box, and perform sealing while the electrode leads and insulating film are fixed in the aligned position, thereby preventing incorrect sealing positioning.

[0014] Technical solution

[0015] The pouch-type battery cell sealing device according to the invention for achieving the above objectives comprises: a seating fixture (100) configured to allow a pouch-type battery cell (C) to be seated on the fixture, the pouch-type battery cell having electrode leads and an insulating film located in a sealing portion of a pouch-shaped box; a stamping portion (200) configured to form guide holes (H) in each of the sealing portion, the electrode leads and the insulating film; and a pair of sealing tools (300) configured to seal the sealing portion, wherein the sealing tools (300) have guide protrusions (310) on their surfaces facing the sealing portion.

[0016] Furthermore, in the pouch-type battery cell sealing device according to the present invention, the guide holes (H) formed by the stamping portion (200) can be configured to be two or more.

[0017] Furthermore, in the pouch-type battery cell sealing device according to the present invention, the guide holes (H) formed in each of the sealing portion, electrode leads and insulating film can be formed at the same position on the vertical extension line.

[0018] Furthermore, in the pouch-type battery cell sealing device according to the present invention, the guide protrusion (310) may be formed at a position corresponding to the guide hole (H).

[0019] Furthermore, in the bag-type battery cell sealing device according to the present invention, the guide protrusions (310) may be provided in the same number as the guide holes (H).

[0020] Furthermore, in the bag-type battery cell sealing device according to the present invention, the horizontal cross-sectional shape of the guide protrusion (310) can be the same as the horizontal cross-sectional shape of the guide hole (H).

[0021] Furthermore, in the pouch-type battery cell sealing device according to the invention, the guide protrusion (310) can be shaped to have a unit area that gradually decreases toward the guide hole (H).

[0022] Furthermore, in the pouch-type battery cell sealing device according to the present invention, the sealing tool (300) may be provided with a receiving portion (320), which is configured to receive a guide protrusion (310), and the receiving portion (320) may be provided with an elastic member (330) with elasticity.

[0023] Furthermore, in the pouch-type battery cell sealing device according to the present invention, the elastic member (330) may be a spring.

[0024] Furthermore, in the pouch-type battery cell sealing device according to the invention, the height of the guide protrusion (310) can be less than and at least half of the sum of the heights of the guide holes (H) formed in the sealing portion, electrode leads and insulating film.

[0025] Additionally, the pouch cell sealing method according to the present invention includes the steps of forming guide holes in each of the sealing portion, electrode leads, and insulating film of the pouch cell, and the step of sealing the sealing portion using a pair of sealing tools, wherein, in the step of sealing the sealing portion using a pair of sealing tools, a guide protrusion formed on the sealing tool is inserted into the guide hole.

[0026] Furthermore, the bag-type battery cell sealing method according to the present invention may further include: before the step of sealing the sealing portion using a pair of sealing tools, adjusting the position of the sealing tools such that the guide protrusion is located at the same position as the guide hole on the vertical extension line.

[0027] Additionally, the pouch-type battery cell according to the present invention includes: an electrode assembly; a pouch-shaped box configured to receive the electrode assembly, the pouch-shaped box having a sealing portion extending a certain length from its edge; an electrode lead, one side of which is connected to an electrode tab of the electrode assembly, and the other side of which protrudes to the outside of the pouch-shaped box; and an insulating film located between the sealing portion and the electrode lead, wherein a guide hole (H) is formed in each of the sealing portion, the electrode lead, and the insulating film.

[0028] Furthermore, in the pouch-type battery cell according to the invention, the guide holes (H) formed in each of the sealing portion, electrode leads, and insulating film can be formed at the same position on the vertical extension line.

[0029] Furthermore, in the pouch-type battery cell according to the present invention, the guide holes (H) can be configured as two or more.

[0030] Beneficial effects

[0031] As is apparent from the above description, the pouch cell sealing device for easy positioning according to the present invention and the pouch cell sealing method using the pouch cell sealing device have the following advantages: a guide protrusion is formed on the sealing tool, and when the sealing tool is in close contact with the sealing part, the guide protrusion is inserted into a guide hole formed in the sealing part, thereby aligning the sealing part, electrode leads and insulating film in a fixed position.

[0032] Furthermore, the pouch-type battery cell sealing device and the pouch-type battery cell sealing method using the pouch-type battery cell sealing device according to the present invention have the following advantages: an elastic member connected to the guide protrusion is provided, thereby preventing damage to the guide protrusion due to tight contact between sealing tools. Attached Figure Description

[0033] Figure 1 This is a side view showing a conventional battery box sealing device.

[0034] Figure 2 This is a perspective view showing a pouch-type battery cell sealing device according to a first preferred embodiment of the present invention.

[0035] Figure 3 This is a perspective view showing a portion of the sealing tool in a pouch-type battery cell sealing device according to a first preferred embodiment of the present invention.

[0036] Figure 4 This is a cross-sectional view showing a sealing tool in a pouch-type battery cell sealing device according to a first preferred embodiment of the present invention.

[0037] Figure 5 This is a cross-sectional view showing the sealing tool in a pouch-type battery cell sealing device according to a second preferred embodiment of the present invention. Detailed Implementation

[0038] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that these preferred embodiments can be readily implemented by those skilled in the art. However, in describing the operating principles of the preferred embodiments of the present invention, detailed descriptions of known functions and configurations incorporated herein may obscure the subject matter of the invention.

[0039] Furthermore, the same reference numerals will be used in all the accompanying drawings to refer to parts that perform similar functions or operations. Throughout the specification, where one part is referred to as being connected to another part, one part may not only be directly connected to the other part, but also indirectly connected to the other part via another part. Moreover, including an element does not mean excluding other elements, but rather means that such elements may be included unless otherwise specified.

[0040] In the following description, a pouch cell sealing device for easy positioning and a method for sealing a pouch cell using the pouch cell sealing device according to the present invention will be described with reference to the accompanying drawings.

[0041] Figure 2 This is a perspective view showing a pouch-type battery cell sealing device according to a first preferred embodiment of the present invention. Figure 3 This is a perspective view showing a portion of the sealing tool in a pouch-type battery cell sealing device according to a first preferred embodiment of the present invention, and Figure 4 This is a cross-sectional view showing a sealing tool in a pouch-type battery cell sealing device according to a first preferred embodiment of the present invention.

[0042] Reference Figures 2 to 4 According to a first preferred embodiment of the present invention, a pouch-type battery cell sealing device includes a seating clamp 100, a stamping part 200, and a sealing tool 300.

[0043] First, the seating fixture 100, which is configured to allow the pouch-type battery cell C for sealing to sit on, can be a worktable with a flat upper surface, and there are no particular restrictions, as long as it can support the pouch-type battery cell C sitting on it so that the sealing process can be performed.

[0044] Here, the pouch-type battery cell C includes an electrode assembly, a pouch-shaped box configured to receive the electrode assembly, electrode leads, and an insulating film located between a sealing portion of the pouch-shaped box and the electrode leads. One side of the electrode leads is connected to an electrode tab of the electrode assembly, and the other side of the electrode leads protrudes outside the pouch-shaped box.

[0045] The electrode assembly is configured such that the positive and negative electrodes are alternately stacked multiple times with a separator inserted between them, and a pair of electrode leads consisting of positive and negative leads are exposed to the outside of the bag-shaped box while being electrically connected to the positive and negative terminals respectively.

[0046] A positive electrode is manufactured by applying a positive electrode mixture containing a positive electrode active material to a positive electrode current collector and drying it, and the positive electrode mixture may optionally include a binder, a conductive agent or a filler as needed.

[0047] Generally, the positive electrode current collector can have a thickness ranging from 3 μm to 500 μm. There are no particular limitations on the positive electrode current collector, as long as it exhibits high conductivity and does not cause any chemical changes in the battery in which it is used. For example, the positive electrode current collector can be made of stainless steel, aluminum, nickel, titanium, or sintered carbon. Alternatively, it can be made of aluminum or stainless steel with a surface treated with carbon, nickel, titanium, or silver. Furthermore, the positive electrode current collector can have micron-scale uneven patterns formed on its surface to improve the adhesion of the positive electrode active material, or it can be constructed in any of various forms, such as a film, sheet, foil, mesh, porous body, foam, or nonwoven fabric.

[0048] The following can be used as positive electrode active materials: layered compounds, such as lithium cobalt oxide (LiCoO2) or lithium nickel oxide (LiNiO2), or compounds substituted with one or more transition metals; compounds with the chemical formula Li 1+x Mn 2-x Lithium manganese oxides represented by O4 (where x = 0 to 0.33) or lithium manganese oxides such as LiMnO3, LiMn2O3 or LiMnO2; lithium copper oxides (Li2CuO2); vanadium oxides, such as LiV3O8, V2O5 or Cu2V2O7; and those with the chemical formula LiNi 1-x M x Ni-site lithium nickel oxide represented by O2 (where M = Co, Mn, Al, Cu, Fe, Mg, B or Ga, and x = 0.01 to 0.3); by chemical formula LiMn 2-x M x Lithium manganese composite oxides represented by O2 (where M = Co, Ni, Fe, Cr, Zn or Ta, and x = 0.01 to 0.1) or the chemical formula Li2Mn3MO8 (where M = Fe, Co, Ni, Cu or Zn); LiMn2O4, wherein a portion of the Li in the chemical formula is replaced by an alkaline earth metal ion; disulfide compounds; or Fe2(MoO4)3; however, the invention is not limited thereto.

[0049] The negative electrode is manufactured by applying a negative electrode mixture containing a negative electrode active material to a negative electrode current collector and drying it. The negative electrode mixture may also include components such as conductive agents, binders or fillers as needed.

[0050] Negative electrode current collectors are typically manufactured with a thickness ranging from 3 μm to 500 μm. There are no particular limitations on the negative electrode current collector, as long as it exhibits high conductivity and does not cause any chemical changes in the battery in which it is used. For example, the negative electrode current collector can be made of copper, stainless steel, aluminum, nickel, titanium, or sintered carbon. Alternatively, it can be made of copper or stainless steel with a surface treated with carbon, nickel, titanium, or silver, or it can be made of an aluminum-cadmium alloy. Furthermore, in the same manner as the positive electrode current collector, the negative electrode current collector can have micron-scale uneven patterns formed on its surface to improve the adhesion of the negative electrode active material, or it can be constructed in any of various forms, such as a film, sheet, foil, mesh, porous body, foam, or nonwoven fabric.

[0051] The separator prevents short circuits between the negative and positive electrodes and allows only lithium-ion migration. It is constructed using an insulating film with high ion permeability and mechanical strength. The pore size of the separator is typically from 0.01 μm to 10 μm, and the thickness is typically from 5 μm to 300 μm. Preferably, the separator is made from any of the following: polyethylene, polypropylene, a polyethylene / polypropylene bilayer, a polyethylene / polypropylene / polyethylene trilayer, a polypropylene / polypropylene / polypropylene trilayer, and organic fiber filter paper; however, the invention is not limited thereto.

[0052] Meanwhile, each of the negative current collector and the positive current collector includes a portion on which a slurry containing active material is applied and an uncoated portion, the uncoated portion being the portion on which no slurry mixture is applied. The uncoated portion is cut to form an electrode tab, or individual conductive components are connected to the uncoated portion by ultrasonic welding to form an electrode tab, and the electrode tabs are aggregated to form an electrode tab bundle.

[0053] The pouch can be made of a laminate including an inner cover layer, a metal layer and an outer cover layer, and can be provided with a pouch portion configured to receive an electrode assembly and an edge portion extending outward from one side of the pouch portion for a certain length.

[0054] The inner cover layer is in direct contact with the electrode assembly, and therefore must have high insulation performance and high electrolytic resistance. Additionally, the inner cover layer must have high sealing performance to seal the bag-like box from the outside; that is, the thermally bonded seal between the inner layers must have excellent thermal bond strength.

[0055] The inner cover layer may be made of materials selected from polyolefin-based resins such as polypropylene, polyethylene, polyethylene acrylic or polybutene, polyurethane resins and polyimide resins, which exhibit excellent chemical resistance and high sealing performance; however, the invention is not limited thereto, and polypropylene, which exhibits excellent mechanical properties such as tensile strength, stiffness, surface hardness and impact resistance as well as excellent chemical resistance, is most preferably used.

[0056] The metal layer that contacts the inner cover layer corresponds to the barrier layer, which is configured to prevent moisture or various gases from penetrating into the battery from the outside. Lightweight and easily formed aluminum film can be used as a preferred material for the metal layer.

[0057] An outer cover layer is disposed on the other surface of the metal layer, and the outer cover layer may be made of a heat-resistant polymer that exhibits excellent tensile strength, moisture permeability resistance, and air permeability resistance, thereby enabling the outer cover layer to exhibit high heat resistance and chemical resistance while protecting the electrode assembly. As an example, the outer cover layer may be made of nylon or polyethylene terephthalate; however, the invention is not limited thereto.

[0058] Typically, a pair of electrode leads, consisting of a positive lead and a negative lead, are electrically connected to the electrode contact bundle by soldering or other means. More specifically, they are electrically connected to the positive contact bundle and the negative contact bundle, respectively, and are exposed to the outside of the bag-shaped box.

[0059] The insulating film is located on the upper and lower surfaces of the electrode leads that overlap with the heat-fused sealing portion of the bag-shaped box, and is configured to prevent the electricity generated by the electrode assembly from flowing through the electrode leads to the bag-shaped box, and to maintain the sealed state of the bag-shaped box.

[0060] Preferably, the insulating film 500 is made of a non-conductive material that does not conduct electricity well, and typically uses an insulating tape that is relatively thin and easy to attach to the electrode leads.

[0061] Specifically, the insulating film may be made of at least one selected from polyimide (PI), polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET) and polyvinyl chloride (PVC), high-density polyethylene (HDPE) and epoxy resin, and is bonded to the inner resin layer of the bag-shaped box by heat and pressure hot-melt bonding.

[0062] In a pouch cell, a guide hole H can be formed in each of the sealing portion, electrode leads, and insulating film by a stamping portion 200. The guide hole H will be described below.

[0063] In this case, the guide hole H formed in the sealing part, electrode lead and insulating film can be formed at the same position on the vertical extension line.

[0064] In addition, the guide hole H can be set to two or more.

[0065] Next, the stamping portion 200 is configured to form guide holes H in each of the sealing portion of the pouch-like box, the electrode leads, and the insulating film. As an example, the stamping portion is formed in a cylindrical shape, and the guide holes H are formed by pressing and cutting at predetermined positions.

[0066] The stamping section 200 can be set in the same number as the number of guide holes H to be formed.

[0067] In this case, the stamping portion 200 can move in both the horizontal and vertical directions, and if the number of stamping portions is less than the number of guide holes H to be formed, the stamping portion 200 can form guide holes H on one side and then move to form guide holes H on the other side.

[0068] Here, two or more guide holes H are formed in the overlapping parts of the sealing portion, electrode leads and insulating film, because if only one guide hole H is formed, positional deviations may occur during subsequent alignment, such as rotation around a guide hole H.

[0069] In addition, the guide holes H formed in the sealing portion, electrode leads and insulating film are formed at the same position on the vertical extension line, so that the guide holes can be aligned at a predetermined position during positioning.

[0070] The sealing tool 300 is configured to seal the sealing portion by applying heat and pressure to the sealing portion located at the edge of the bag-shaped box, and can be arranged in pairs above and below the sealing portion to be sealed.

[0071] A guide protrusion 310 of a certain height is formed on at least one of a pair of sealing tools 300.

[0072] When the guide protrusion 310 is pressed against the bag-shaped box, it is inserted into the guide hole H to align the positions of the sealing part, electrode lead and insulating film in each of them where the guide hole H is formed. The guide protrusion 310 is formed at the position corresponding to the guide hole H and is formed in the same number as the guide hole H.

[0073] As described above, since the guide protrusion 310 is inserted into the guide hole H, the horizontal cross-sectional shape of the guide protrusion can be the same as the horizontal cross-sectional shape of the guide hole H.

[0074] In addition, the guide protrusion 310 can be shaped such that its upper portion has the same unit area as the guide hole H, and the unit area decreases from its upper portion to its lower portion which is closer to the guide hole H, so that the guide protrusion 310 can be inserted into the guide hole H.

[0075] In this case, the height of the guide protrusion 310 is preferably formed to be at least half the sum of the heights of the guide holes H formed in the sealing portion, the electrode leads, and the insulating film. This is because if the height of the guide protrusion 310 is greater than the sum of the heights of the guide holes H, the sealing tool 300 may not press tightly against the sealing portion due to the guide protrusion 310, resulting in poor sealing. Furthermore, if the height of the guide protrusion 310 is less than half the sum of the heights of the guide holes H, the guide protrusion 310 may be insufficient in height, resulting in misalignment of the guide holes H.

[0076] Figure 5 This is a cross-sectional view showing the sealing tool in a pouch-type battery cell sealing device according to a second preferred embodiment of the present invention.

[0077] Reference Figure 5 In addition to the sealing tool 300 also having a receiving portion 320 and an elastic member 330, the pouch-type battery cell sealing device according to the second preferred embodiment of the present invention is similar to the reference. Figures 2 to 4 The description of the bag-type battery cell sealing device according to the first embodiment is the same, and therefore the description of the same construction will be omitted.

[0078] In the pouch-type battery cell sealing device according to the second embodiment of the present invention, the sealing tool 300 includes a guide protrusion 310, a receiving portion 320, and an elastic member 330.

[0079] The guide protrusion 310 is configured to protrude a certain height from the surface of the sealing tool 300 that is in close contact with the sealing portion of the bag-shaped box.

[0080] The receiving portion 320 is a space that is configured as part of the receiving guide protrusion 310, and can be recessed to a certain depth from the surface of the sealing tool 300 that is in close contact with the sealing portion.

[0081] As described above, the receiving portion 320 is configured to receive the guide protrusion 310, and therefore the horizontal cross-sectional shape of the receiving portion 320 is formed to be the same as the horizontal cross-sectional shape of the guide protrusion 310.

[0082] The elastic member 330 is disposed in the receiving portion 320 and is made of an elastic material capable of contraction and expansion.

[0083] If, when a pair of sealing tools 300 are in close contact with the sealing portion to seal the sealing portion, the distance between the pair of sealing tools 300 is less than the height of the guide protrusion 310, then a portion of the guide protrusion 310 is received in the receiving portion 320, thereby causing the elastic member 330 to contract, and when the pair of sealing tools 300 are spaced apart after sealing, the elastic member 330 extends to return the guide protrusion 310 to its original position.

[0084] In this way, the elastic member 330 can contract and expand to prevent damage to the guide protrusion 310 due to the pressure applied to the guide protrusion 310 when a pair of sealing tools 300 come into closer contact with the sealing portion than normal.

[0085] The elastic member 330 may be a spring that can easily contract and extend, or it may be rubber or silicone resin provided in the receiving portion 320 by filling; however, the invention is not limited thereto, and any material that can prevent damage to the guide protrusion 310 due to the pressure applied by the operation of the sealing tool 300 may be used.

[0086] The pouch battery cell sealing method using the pouch battery cell sealing apparatus according to a preferred embodiment of the present invention includes: a first step of placing the pouch battery cell on a seating fixture; a second step of forming guide holes in each of the sealing portion, electrode leads, and insulating film of the pouch battery cell; and a third step of sealing the sealing portion using a pair of sealing tools.

[0087] First, the first step in placing the pouch-shaped battery cell on the seating fixture is to place the pouch-shaped battery cell on the upper surface of the seating fixture to seal the edges of the pouch-shaped box.

[0088] At this time, the pouch battery unit is seated on the upper surface of the seating fixture, such that a portion of the pouch battery unit located on the vertical extension line extends from the upper surface of the seating fixture, and more specifically, the pouch battery unit is seated on the upper surface of the seating fixture such that the sealing portion to be sealed extends from the upper surface of the seating fixture in the horizontal direction.

[0089] The seating position of the pouch-type battery cell is configured to prevent the stamping portion from penetrating the sealing portion, extending downwards from the sealing portion and colliding with the seating fixture during the formation of the guide hole in the sealing portion, and to allow the sealing tool to make close contact with the lower surface of the sealing portion for sealing.

[0090] The second step of forming a guide hole in each of the sealing portion, electrode leads, and insulating film of the pouch cell is to form a guide hole in each of the sealing portion, electrode leads, and insulating film using a stamping part.

[0091] Here, prior to the third step, the following process can be further performed: the position of the sealing tool is adjusted by moving the sealing tool so that the guide protrusion of the sealing tool is located on the vertical extension line at the same position as the guide hole formed in the second step.

[0092] The third step of sealing the sealing portion using the pair of sealing tools is as follows: applying heat and pressure to the sealing portion located at the edge of the bag-shaped box using the pair of sealing tools to seal the sealing portion.

[0093] When the sealing tool comes into close contact with the sealing part, the guide protrusion provided on the sealing tool is inserted into the guide hole formed in the sealing part, the electrode lead and the insulating film, thereby sealing is performed with the sealing part, the electrode lead and the insulating film in a state of alignment.

[0094] In addition, the present invention provides a battery cell manufactured by a pouch-type battery cell sealing method, as well as a battery module, battery pack or device including the battery cell.

[0095] Those skilled in the art will understand that, based on the above description, various applications and modifications can be made within the scope of this invention.

[0096] Explanation of reference numerals in the attached figures

[0097] 100: Seating clamp

[0098] 200: Stamping section

[0099] 300: Sealing tools

[0100] 310: Guiding protrusion

[0101] 320: Acceptance Section

[0102] 330: Elastic component

[0103] C: Pocket-type battery unit

[0104] H: Guide hole

Claims

1. A bag-type battery cell sealing device, comprising: A seating fixture configured to allow a pouch-type battery cell to be seated on the fixture, the pouch-type battery cell having electrode leads and an insulating film located in a sealed portion of a pouch-shaped box; A stamping portion, wherein the stamping portion is configured to form a guide hole in each of the sealing portion, the electrode lead and the insulating film; as well as A pair of sealing tools, the pair of sealing tools being configured to seal the sealing portion, wherein... The sealing tool has a guide protrusion on the surface of the sealing tool facing the sealing portion.

2. The pouch cell sealing apparatus of claim 1, wherein, The guide holes formed by the stamping section are configured to be two or more.

3. The pouch cell sealing apparatus of claim 2, wherein, The guide holes formed in each of the sealing portion, the electrode leads, and the insulating film are formed at the same position on the vertical extension line.

4. The pouch cell sealing apparatus of claim 1, wherein, The guide protrusion is formed at a position corresponding to the guide hole.

5. The pouch cell sealing apparatus of claim 2, wherein, The guide protrusions are provided in the same number as the guide holes.

6. The bag-type battery cell sealing device according to claim 1, wherein, The horizontal cross-sectional shape of the guide protrusion is the same as the horizontal cross-sectional shape of the guide hole.

7. The pouch-type battery cell sealing device according to claim 6, wherein, The guide protrusion is shaped to have a unit area that gradually decreases toward the guide hole.

8. The bag-type battery cell sealing device according to claim 1, wherein, The sealing tool is provided with a receiving portion configured to receive the guide protrusion, and The receiving portion is provided with an elastic member.

9. The pouch-type battery cell sealing device according to claim 8, wherein, The elastic component is a spring.

10. The pouch-type battery cell sealing device according to claim 1, wherein, The height of the guide protrusion is not greater than the sum of the heights of the guide holes formed in each of the sealing portion, the electrode lead, and the insulating film, and is at least half of the sum of the heights.

11. A method for sealing a pouch-type battery cell, comprising: The steps of forming guide holes in each of the sealed portion, electrode leads, and insulating film of the pouch cell, and The step of sealing the sealing portion using a pair of sealing tools. In the step of sealing the sealing portion using the pair of sealing tools, a guide protrusion formed on the sealing tool is inserted into the guide hole.

12. The method for sealing a pouch-type battery cell according to claim 11, further comprising: Before using the pair of sealing tools to seal the sealing portion, adjust the position of the sealing tools so that the guide protrusion is located at the same position as the guide hole on the vertical extension line.

13. A pouch-type battery cell, comprising: Electrode assembly; A bag-shaped box configured to receive the electrode assembly, the bag-shaped box having a sealing portion extending a length from the edge of the bag-shaped box; An electrode lead, one side of which is connected to the electrode tab of the electrode assembly, and the other side of which protrudes to the outside of the pouch-shaped box; as well as An insulating film is located between the sealing portion and the electrode lead, wherein... A guide hole is formed in each of the sealing portion, the electrode lead, and the insulating film.

14. The pouch-type battery cell according to claim 13, wherein, The guide holes formed in each of the sealing portion, the electrode leads, and the insulating film are formed at the same position on the vertical extension line.

15. The pouch-type battery cell according to claim 14, wherein, The guide holes are configured to be two or more.

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