Pressing jig for pouch-type secondary batteries and inspection method for pouch-type secondary batteries using the same

Abstract

The present invention relates to a pouch-type secondary battery pressing jig and a pouch-type secondary battery inspection method using the same, characterized by comprising: a first pressing unit including a first pressing plate configured to seat the second surface of a pouch-type secondary battery; a second pressing unit including a second pressing plate having air holes formed so that the fifth and sixth surfaces are in communication, configured to press the first surface of the pouch-type secondary battery; and an air injection unit configured to inject air onto the first surface of the pouch-type secondary battery through the air holes.

Description

Technical Field

[0004]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0001279 filed on January 4, 2024, and all the contents disclosed in the Korean patent application are incorporated herein by reference.

[0002] The present invention relates to a pouch-type secondary battery pressing jig and a pouch-type secondary battery inspection method using the same. More specifically, the present invention relates to a pouch-type secondary battery pressing jig capable of pressing both sides of a pouch-type secondary battery and measuring the insulation resistance of the pouch-type secondary battery to determine the quality of the pouch-type secondary battery, and a pouch-type secondary battery inspection method using the same.

Background Art

[0003] As the technology development and demand for mobile devices increase, rechargeable secondary batteries are being used as an energy source for various mobile devices. Secondary batteries are also attracting attention as an energy source for electric vehicles, hybrid electric vehicles, etc., which are presented as alternatives to existing gasoline vehicles and diesel vehicles that use fossil fuels.

[0004] Secondary batteries are classified into cylindrical batteries and prismatic batteries in which the electrode assembly is built into a cylindrical or prismatic metal can according to the shape of the battery case, and pouch-type batteries in which the electrode assembly is built into a pouch-type case made of an aluminum laminate sheet.

[0005] FIG. 1 is a diagram for explaining a conventional pouch-type secondary battery pressing jig.

[0006] Referring to FIG. 1, a pouch-type secondary battery 10 is seated on the upper surface of a lower jig 2, an upper jig 1 descends to press the pouch-type secondary battery 10, and the insulation resistance between the pouch-type secondary battery 10 and the upper jig 1 or the lower jig 2 is measured through a measuring unit to determine the quality.

[0007] Conventional pouch-type secondary battery pressing jigs have a problem where, when pressing the pouch-type secondary battery 10, surface pressure is generated between the pouch-type secondary battery 10 and the lower jig 2, and as the upper jig 1 rises, the pouch-type secondary battery 10 moves while adhering to the lower surface of the upper jig 1, causing a pickup error. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Korean Patent Publication No. 10-2015-0054372 [Overview of the project] [Problems that the invention aims to solve]

[0009] To solve the aforementioned problems, the objective is to provide a pouch-type secondary battery pressing jig that can prevent surface pressure generation on the pouch-type secondary battery after pressing it, and to be able to determine whether the pouch-type secondary battery is good or bad, and a pouch-type secondary battery inspection method using the same. [Means for solving the problem]

[0010] As a technical means to achieve the above-mentioned objectives, a pouch-type secondary battery pressing jig according to one embodiment of the present invention is characterized by comprising: a first pressing unit (100) including a first pressing plate (110) on which the second surface (12) of a pouch-type secondary battery (10) is seated; a second pressing unit (200) including a second pressing plate (210) having an air hole (213) formed so that the fifth surface (211) and the sixth surface (212) are in communication, and configured to press the first surface 11 of the pouch-type secondary battery (10); and an air injection unit (300) configured to inject air onto the first surface (11) of the pouch-type secondary battery (10) through the air hole (213).

[0011] Furthermore, in a pouch-type secondary battery pressing jig according to one embodiment of the present invention, the first pressing unit (100) is characterized by including a first pressing plate (110) which includes a third surface (111) that contacts the second surface (12) of the pouch-type secondary battery (10), and a first driving unit (120) which has a shaft (121) connected to the fourth surface (112) of the first pressing plate (110) so as to support the first pressing plate (110) and moves the first pressing plate (110) in a first direction.

[0012] Furthermore, in a pouch-type secondary battery pressing jig according to one embodiment of the present invention, the first pressing unit (100) further includes a pressing sensor (130) that measures the force in the second direction when the pouch-type secondary battery (10) is subjected to a force in the second direction by the second pressing unit (200).

[0013] Furthermore, in a pouch-type secondary battery pressing jig according to one embodiment of the present invention, the first drive unit (120) is characterized in that it provides a force in the first direction to the second surface (12) of the pouch-type secondary battery (10) in response to the force in the second direction measured via the pressing sensor (130).

[0014] Furthermore, in a pouch-type secondary battery pressing jig according to one embodiment of the present invention, the second pressing unit (200) is characterized by including a second pressing plate (210) that contacts the first surface (11) of the pouch-type secondary battery (10), and a second drive unit (220) to which a shaft (221) is connected to the fifth surface (211) of the second pressing plate (210) and moves the second pressing plate (210) in a second direction.

[0015] Furthermore, in a pouch-type secondary battery pressing jig according to one embodiment of the present invention, the second drive unit (220) moves the second pressing plate (210) in a second direction and provides a force in the second direction to the first surface (11) of the pouch-type secondary battery (10).

[0016] Furthermore, in a pouch-type secondary battery pressing jig according to one embodiment of the present invention, the second pressing plate (210) is characterized in that it is arranged to be spaced apart from the first pressing plate (110) in a first direction.

[0017] Furthermore, in a pouch-type secondary battery pressing jig according to one embodiment of the present invention, the air holes (213) are characterized in that a plurality of them are formed in the central part of the second pressing plate (210) that contacts the first surface (11) of the pouch-type secondary battery (10).

[0018] Furthermore, in a pouch-type secondary battery pressing jig according to one embodiment of the present invention, the air injection unit (300) is characterized in that, when the first surface (11) of the pouch-type secondary battery (10) is attached to the second pressing plate (210), air is injected onto the first surface (11) of the pouch-type secondary battery (10) to cause the pouch-type secondary battery (10) to detach from the second pressing plate (210).

[0019] Furthermore, in a pouch-type secondary battery pressing jig according to one embodiment of the present invention, a measuring unit (400) for measuring the insulation resistance between the pouch-type secondary battery (10) and the first pressing plate (110) or the second pressing plate (210) is included.

[0020] Furthermore, the pouch-type secondary battery pressing jig according to one embodiment of the present invention is characterized by further including a control unit that determines the quality of the pouch-type secondary battery (10) based on the insulation resistance measured via the measurement unit (400).

[0021] In addition, a method for inspecting a pouch-type secondary battery using a pouch-type secondary battery pressing jig according to an embodiment of the present invention includes: (S1) arranging the pouch-type secondary battery (10) with respect to the first pressing plate (110); (S2) moving the second pressing plate (210) in a second direction to press the pouch-type secondary battery (10); (S3) measuring the insulation resistance of the pouch-type secondary battery (10) via the measurement unit (400); and (S4) moving the second pressing plate (210) in a first direction to release the pressing of the pouch-type secondary battery (10).

[0022] In addition, in the method for inspecting a pouch-type secondary battery according to an embodiment of the present invention, in the step (S3), the control unit determines the quality of the pouch-type secondary battery (10) based on the insulation resistance value of the pouch-type secondary battery (10) measured via the measurement unit (400).

[0023] In addition, in the method for inspecting a pouch-type secondary battery according to an embodiment of the present invention, in the step (S4), the air injection unit (300) injects air onto the first surface (11) of the pouch-type secondary battery (10) through the air hole (213).

Effects of the Invention

[0024] As described above, according to the pouch-type secondary battery pressing jig and the method for inspecting a pouch-type secondary battery using the same according to the present invention, by injecting air onto the first surface of the pouch-type secondary battery through the air hole formed in the second pressing plate, it is possible to prevent the generation of surface pressure and pickup error of the pouch-type secondary battery.

Brief Description of the Drawings

[0025] [Figure 1] It is a diagram for explaining a pouch-type secondary battery pressing jig according to the prior art.

[0026] [Figure 2]This is a perspective view illustrating a pouch-type secondary battery pressing jig according to one embodiment of the present invention.

[0027] [Figure 3] This diagram illustrates the first and second pressing portions of a pouch-type secondary battery pressing jig according to one embodiment of the present invention.

[0028] [Figure 4] This diagram illustrates the state in which the first pressing portion and the second pressing portion of a pouch-type secondary battery pressing jig according to one embodiment of the present invention press against a pouch-type secondary battery.

[0029] [Figure 5] This is a perspective view illustrating the second pressing plate of a pouch-type secondary battery pressing jig according to one embodiment of the present invention.

[0030] [Figure 6] This is a cross-sectional view illustrating the second pressing plate shown in Figure 5. [Modes for carrying out the invention]

[0031] Hereinafter, with reference to the attached drawings, embodiments that allow a person with ordinary skill in the art to carry out the present invention will be described in detail. However, in describing in detail the operating principles of preferred embodiments of the present invention, if it is determined that a specific description of a related known function or configuration may unnecessarily obscure the gist of the present invention, such detailed description will be omitted.

[0032] Furthermore, the same reference numerals shall be used throughout the drawings for parts that have similar functions and operations. Throughout the specification, when it is said that one part is connected to another part, this includes not only direct connections but also indirect connections through other elements in between. Also, when it is said that a component is included, unless otherwise stated, it does not mean that other components are excluded, but rather that other components may be included.

[0033] Furthermore, using Figure 3 as a reference, the first direction refers to the 12 o'clock position, and the second direction refers to the 6 o'clock position.

[0034] The following describes the pouch-type secondary battery pressing jig according to the present invention.

[0035] First, the pouch-type rechargeable battery 10 includes a battery case, and the battery case uses a laminate sheet consisting of an inner coating layer, a metal layer and an outer coating layer. Electrode assembly housing And a gas pocket is formed.

[0036] Since the internal coating layer comes into direct contact with the electrode assembly, it must have insulating and electrolytic resistance properties. Furthermore, for sealing against the outside, it must have sealing properties; that is, the sealing areas where the internal layers are heat-bonded together must have excellent thermal bonding strength.

[0037] The material for such an internal coating layer can be selected from polyolefin resins such as polypropylene, polyethylene, polyethylene acrylic acid, and polybutylene, polyurethane resins, and polyimide resins, which have excellent chemical resistance and good sealing properties, but are not limited to these. Polypropylene is most preferred because it has excellent mechanical properties such as tensile strength, rigidity, surface hardness, and impact strength, as well as excellent chemical resistance.

[0038] The metal layer in contact with the internal coating layer acts as a barrier layer that prevents moisture and various gases from penetrating into the battery from the outside. A preferred material for such a metal layer is a thin aluminum film that is lightweight yet has excellent formability.

[0039] Furthermore, the other side of the metal layer is provided with an external coating layer, and such an external coating layer can be made of a heat-resistant polymer with excellent tensile strength, moisture permeability, and air permeability so as to protect the electrode assembly while ensuring heat resistance and chemical resistance. For example, nylon or polyethylene terephthalate can be used, but is not limited to these.

[0040] The electrode assembly may consist of, but is not limited to, a jelly roll type electrode assembly having a structure in which a separation membrane is interposed between a long sheet-like negative electrode and a positive electrode before it is wound up, a stack type electrode assembly consisting of unit cells in which rectangular positive and negative electrodes are stacked with a separation membrane in between, a stack-folding type electrode assembly in which the unit cells are wound up by a long separation film, or a lamination-stack type electrode assembly in which the unit cells are stacked with a separation membrane in between and adhere to each other.

[0041] The positive electrode includes a positive electrode current collector and a positive electrode active material coated on the upper and lower surfaces of the positive electrode current collector.

[0042] The positive electrode current collector may generally have a thickness of 3 to 500 μm. It is not particularly limited as long as it has high conductivity without causing chemical changes to the battery, and for example, stainless steel, aluminum, nickel, titanium, calcined carbon, or aluminum or stainless steel with a surface treatment of carbon, nickel, titanium, silver, etc. can be used. In addition, in order to increase the adhesion strength of the positive electrode active material, fine irregularities may be formed on the surface, or it can take various forms such as film, sheet, foil, net, porous material, foam, or nonwoven fabric.

[0043] On the other hand, the positive electrode active material can be mixed with conductive material and binder, and fillers may be added as needed.

[0044] The negative electrode includes a negative electrode current collector and a negative electrode active material coated on the lower and upper surfaces of the negative electrode current collector.

[0045] The negative electrode current collector is generally manufactured to have a thickness of 3 to 500 μm. Such a negative electrode current collector is not particularly limited as long as it is conductive without causing a chemical change in the battery, and can be made of materials such as copper, stainless steel, aluminum, nickel, titanium, calcined carbon, copper or stainless steel surface-treated with carbon, nickel, titanium, silver, etc., or aluminum-cadmium alloy.

[0046] Furthermore, by forming fine irregularities on the surface, the bonding force of the negative electrode active material can be strengthened, and it can be used in a variety of forms such as films, sheets, foils, nets, porous materials, foams, and nonwoven fabrics.

[0047] Of course, the negative electrode active material can be further mixed with a conductive material and a binder to coat the negative electrode current collector.

[0048] The separation membrane prevents the aforementioned short circuit between the negative and positive electrodes, allowing only the movement of lithium ions. The material for such a separation membrane is preferably, but not limited to, one of the following: polyethylene, polypropylene, polyethylene / polypropylene double layer, polyethylene / polypropylene / polyethylene triple layer, polypropylene / polypropylene / polypropylene triple layer, and organic fiber filter paper.

[0049] Figure 2 is a perspective view illustrating a pouch-type secondary battery pressing jig according to one embodiment of the present invention, Figure 3 is a drawing illustrating the first pressing portion and the second pressing portion of the pouch-type secondary battery pressing jig according to one embodiment of the present invention, and Figure 4 is a diagram illustrating the state in which the first pressing portion and the second pressing portion of the pouch-type secondary battery pressing jig according to one embodiment of the present invention press a pouch-type secondary battery. Furthermore, Figure 5 is a perspective view illustrating the second pressing plate of the pouch-type secondary battery pressing jig according to one embodiment of the present invention, and Figure 6 is a cross-sectional view illustrating the second pressing plate shown in Figure 5.

[0050] Referring to Figures 2 to 6, the pouch-type secondary battery pressing jig according to the present invention includes a first pressing unit 100, a second pressing unit 200, an air injection unit 300, a measuring unit 400, and a control unit (not shown).

[0051] First, the first pressing unit 100 may include a first pressing plate 110, a first drive unit 120, and a pressing sensor 130.

[0052] The first pressing plate 110 may be configured to seat on the second surface 12 of the pouch-type secondary battery 10. For example, with reference to Figure 3, the second surface 12 of the pouch-type secondary battery 10 is the bottom surface of the pouch-type secondary battery 10, and the first pressing plate 110 may be configured to be positioned in the second direction of the pouch-type secondary battery 10.

[0053] Furthermore, the first pressing plate 110 may include a third surface 111 located in a first direction and a fourth surface 112 located in a second direction. The third surface 111 of the first pressing plate 110 can contact the second surface 12 of the pouch-type secondary battery 10. Also, the shaft 121 of the first drive unit 120 may be connected to the fourth surface 112 of the first pressing plate 110.

[0054] The first drive unit 120 is connected to the fourth surface 112 of the first pressing plate 110 via a shaft 121, supporting the first pressing plate 110 and allowing the first pressing plate 110 to move in a first direction.

[0055] For example, the first drive unit 120 may be configured to support the pouch-type secondary battery 10 or to provide backup in response to a force in the second direction when it is subjected to a force in the second direction by the second pressing unit 200. For example, such a first drive unit 120 may consist of a backup cylinder.

[0056] Furthermore, the pressure sensor 130 may be configured to measure a force in a second direction when the pouch-type secondary battery 10 is subjected to a force in a second direction by the second pressing unit 200. Such a pressure sensor 130 may be composed of a press load cell.

[0057] Here, the first drive unit 120 can provide a force in the first direction to the second surface 12 of the pouch-type secondary battery 10 in response to a force in the second direction measured via the pressure sensor 130.

[0058] The second pressing unit 200 may include a second pressing plate 210 and a second drive unit 220. The second pressing plate 210 can contact the first surface 11 of the pouch-type secondary battery 10. For example, with reference to Figure 3, the first surface 11 of the pouch-type secondary battery 10 may be the top surface of the pouch-type secondary battery 10, and the second pressing plate 210 may be configured to be positioned in a first direction of the pouch-type secondary battery 10.

[0059] Furthermore, the second pressing plate 210 may be positioned at a distance from the first pressing plate 110 in a first direction. That is, the second pressing plate 210 and the first pressing plate 110 may be provided at a distance from each other, and the pouch-type secondary battery 10 may be placed in the gap formed between the first pressing plate 110 and the second pressing plate 210.

[0060] The second pressing plate 210 may include a fifth surface 211 located in a first direction and a sixth surface 212 located in a second direction. The sixth surface 212 of the second pressing plate 210 can contact the first surface 11 of the pouch-type secondary battery 10. The shaft 221 of the second drive unit 220 may also be connected to the fifth surface 211 of the second pressing plate 210.

[0061] Furthermore, the sixth surface 212 of the second pressing plate 210 may be made of a plate containing Cu (or brass) in order to check whether or not it can conduct electricity with the first surface 11 of the pouch-type secondary battery 10.

[0062] Furthermore, the second pressing plate 210 may be provided with air holes 213 formed so that the fifth surface 211 and the sixth surface 212 are in communication. Multiple air holes 213 may be formed in the central part of the second pressing plate 210 that contacts the first surface 11 of the pouch-type secondary battery 10. For example, multiple air holes 213 may be arranged in a width or length corresponding to the size of the first surface 11 of the pouch-type secondary battery 10.

[0063] The second drive unit 220 of the second pressing unit 200 has a shaft 221 connected to the fifth surface 211 of the second pressing plate 210, allowing the second pressing plate 210 to move in a second direction. Here, the second drive unit 220 can move the second pressing plate 210 in a second direction to provide a force in a second direction to the first surface 11 of the pouch-type secondary battery 10.

[0064] Therefore, the second pressing unit 200 is the second Drive The unit 220 may be configured to press against the first surface 11 of the pouch-type secondary battery 10.

[0065] The second pressing unit 200 is configured such that the second drive unit 220 moves the second pressing plate 210 in a second direction to press the pouch-type secondary battery 10, and the first pressing unit 100 responds to the force in the second direction transmitted by the second pressing unit 200, and the first drive unit 120 This can provide force in the first direction. Such a first pressing unit 100 and second pressing unit 200 can press the pouch-type secondary battery 10 in the first and second directions.

[0066] On the other hand, the air injection unit 300 may be configured to inject air onto the first surface 11 of the pouch-type secondary battery 10 through air holes 213 formed in the second pressing plate 210.

[0067] The air injection unit 300 may be positioned in a first direction relative to the second pressing plate 210. In other words, the air injection unit 300 may be positioned in a first direction relative to the second pressing plate 210, with an air-injecting nozzle positioned toward the air hole 213 and configured to inject air in a second direction.

[0068] Furthermore, if the first surface 11 of the pouch-type secondary battery 10 is attached to the sixth surface 212 of the second pressure plate 210, the air injection unit 300 can inject air onto the first surface 11 of the pouch-type secondary battery 10 to detach the pouch-type secondary battery 10 from the second pressure plate 210.

[0069] For example, to detach the pouch-type secondary battery 10 from the second pressing plate 210, the second pressing unit 200 may press the pouch-type secondary battery 10 and move the second pressing plate 210 in the first direction, at which point the air injection unit 300 may inject air onto the first surface 11 of the pouch-type secondary battery 10, and then move the second pressing plate 210 in the first direction to detach the pouch-type secondary battery 10 from the second pressing plate 210.

[0070] The air injection unit 300 and air holes 213 prevent surface pressure generation and pickup errors in the pouch-type secondary battery 10.

[0071] The measuring unit 400 may be configured to measure the insulation resistance between the pouch-type secondary battery 10 and the first pressing plate 110 or the second pressing plate 210. For example, the measuring unit 400 can measure the insulation resistance between the first pressing plate 110 or the second pressing plate 210 and the pouch-type secondary battery 10 by contacting the first pressing plate 110 or the second pressing plate 210 and the leads on both sides of the pouch-type secondary battery 10 via conductive rubber.

[0072] Since the method for measuring the insulation resistance of the pouch-type secondary battery 10 using the measurement unit 400 can be measured using a method commonly known in the art, a more detailed explanation will be omitted.

[0073] Furthermore, the control unit (not shown) may be configured to determine the quality of the pouch-type secondary battery 10 based on the insulation resistance measured via the measurement unit 400. For example, the control unit (not shown) can determine the quality of the pouch-type secondary battery 10 by measuring the insulation properties of the pouch-type secondary battery 10 based on the resistance measured between the pouch-type secondary battery 10 and the first pressing plate 110 or the second pressing plate 210 via the measurement unit 400.

[0074] For example, the control unit (not shown) can set reference values ​​for resistance, current, or voltage in advance and determine whether the pouch-type secondary battery 10 is good or bad by comparing the resistance, current, or voltage measured via the measurement unit 400 with the predetermined reference values.

[0075] The method for determining the quality of a pouch-type secondary battery in the control unit (not shown) can be implemented using a variety of methods that are obvious to an ordinary engineer in the relevant field; therefore, a more detailed explanation will be omitted.

[0076] Such a control unit (not shown) may be embodied in hardware form, in software form, or in a form combining hardware and software. The control unit may be embodied in the form of a computing device (arithmetic unit) such as a microprocessor, but is not limited thereto, and can be embodied in a variety of forms that are obvious to an ordinary person in the art.

[0077] The following describes a method for inspecting pouch-type secondary batteries using a pouch-type secondary battery pressing jig according to one embodiment of the present invention, with reference to Figures 2 to 6.

[0078] The pouch-type secondary battery inspection method according to the present invention includes the steps of (S1) placing the pouch-type secondary battery 10 on the first pressing plate 110, (S2) moving the second pressing plate 210 in a second direction to press the pouch-type secondary battery 10, (S3) measuring the insulation resistance of the pouch-type secondary battery 10 via the measuring unit 400, and (S4) moving the second pressing plate 210 in a first direction to release the pressure on the pouch-type secondary battery 10.

[0079] For example, at stage (S1), the pouch-type secondary battery 10 can be positioned so that it sits against the third surface 111 of the first pressing plate 110.

[0080] Furthermore, in step (S3), the control unit (not shown) can determine whether the pouch-type secondary battery 10 is good or bad based on the insulation resistance value of the pouch-type secondary battery 10 measured via the measurement unit 400. For example, in step (S3), the control unit (not shown) can compare a predetermined reference value with the insulation resistance of the pouch-type secondary battery 10 measured via the measurement unit 400, and if the insulation resistance of the pouch-type secondary battery 10 is less than the predetermined reference value, it can determine that the pouch-type secondary battery 10 is defective.

[0081] Furthermore, the insulation resistance value of the pouch-type secondary battery 10 measured prior to step (S1) can be measured in advance, and the quality of the pouch-type secondary battery 10 can be determined by comparing it with the insulation resistance value of the pouch-type secondary battery 10 measured in step (S3).

[0082] In stage (S4), the air injection unit 300 can inject air onto the first surface 11 of the pouch-type secondary battery 10 through the air hole 213. For example, when the second pressing plate 210 moves in the first direction, the air injection unit 300 can inject air onto the first surface 11 of the pouch-type secondary battery 10 to prevent the first surface 11 of the pouch-type secondary battery 10 from moving together with the sixth surface 212 of the second pressing plate 210 while in contact with it, thus preventing a pickup error.

[0083] Although specific parts of the present invention have been described in detail above, such specific techniques are merely preferred modes of implementation and do not limit the scope of the present invention. It will be obvious to those skilled in the art that various changes and modifications are possible within the scope of the present invention and its technical concept, and it goes without saying that such variations and modifications also fall within the scope of the appended claims. [Explanation of Symbols]

[0084] 10 Pouch-type rechargeable batteries

[0085] 11 Page 1 12 Side 2

[0086] 100 First pressing unit

[0087] 110 First pressing plate

[0088] 111 3rd page 112 Page 4

[0089] 120 First drive unit 121 Shaft of the first drive unit

[0090] 200 Second pressing unit

[0091] 210 Second pressing plate

[0092] 211 Page 5 212 Page 6

[0093] 213 Air Hole

[0094] 220 Second drive unit 221 Shaft of the second drive unit

[0095] 300 Air Injection Unit

[0096] 400 measuring units

Claims

1. A first pressing unit including a first pressing plate configured to seat the second surface of a pouch-type secondary battery, A second pressing unit includes a second pressing plate having air holes formed so that the fifth and sixth surfaces are in communication, and is configured to press the first surface of the pouch-type secondary battery, A pouch-type secondary battery pressing jig includes an air injection unit configured to inject air onto the first surface of the pouch-type secondary battery through the air holes.

2. The first pressing unit is The first pressing plate includes a third surface that contacts the second surface of the pouch-type secondary battery, A pouch-type secondary battery pressing jig according to claim 1, comprising: a first drive unit whose shaft is connected to the fourth surface of the first pressing plate so as to support the first pressing plate, and which moves the first pressing plate in a first direction.

3. The first pressing unit is The pouch-type secondary battery pressing jig according to claim 2, further comprising a pressing sensor for measuring a force in a second direction when the pouch-type secondary battery is subjected to a force in a second direction by the second pressing unit.

4. The first drive unit is, The pouch-type secondary battery pressing jig according to claim 3, which applies a force in the first direction to the second surface of the pouch-type secondary battery in response to a force in the second direction measured via the pressing sensor.

5. The second pressing unit is The second pressing plate, which contacts the first surface of the pouch-type secondary battery, The pouch-type secondary battery pressing jig according to claim 1, further comprising: a second drive unit having a shaft connected to the fifth surface of the second pressing plate and moving the second pressing plate in a second direction.

6. The pouch-type secondary battery pressing jig according to claim 4, wherein the second drive unit moves the second pressing plate in a second direction and applies a force in the second direction to the first surface of the pouch-type secondary battery.

7. The pouch-type secondary battery pressing jig according to claim 1, wherein the second pressing plate is arranged at a distance from the first pressing plate in a first direction.

8. The pouch-type secondary battery pressing jig according to claim 1, wherein a plurality of air holes are formed in the central part of the second pressing plate that contacts the first surface of the pouch-type secondary battery.

9. The pouch-type secondary battery pressing jig according to claim 8, wherein the air injection unit, when the first surface of the pouch-type secondary battery is attached to the second pressing plate, injects air onto the first surface of the pouch-type secondary battery to cause the pouch-type secondary battery to detach from the second pressing plate.

10. The pouch-type secondary battery pressing jig according to claim 1, comprising a measuring unit for measuring the insulation resistance between the pouch-type secondary battery and the first pressing plate or the second pressing plate.

11. The pouch-type secondary battery pressing jig according to claim 10, further comprising a control unit that determines the quality of the pouch-type secondary battery based on the insulation resistance measured via the measurement unit.

12. A method for inspecting a pouch-type secondary battery using a pouch-type secondary battery pressing jig according to any one of claims 1 to 11, (S1) The step of placing the pouch-type secondary battery on the first pressing plate, (S2) The step of moving the second pressing plate in the second direction to press the pouch-type secondary battery, (S3) The step of measuring the insulation resistance of the pouch-type secondary battery via the measurement unit, A method for inspecting a pouch-type secondary battery, comprising the step of (S4) moving the second pressing plate in a first direction to release the pressure on the pouch-type secondary battery.

13. The aforementioned (S3) step is The method for inspecting a pouch-type secondary battery according to claim 12, wherein the control unit determines whether the pouch-type secondary battery is good or bad based on the insulation resistance value of the pouch-type secondary battery measured via the measuring unit.

14. The aforementioned (S4) step is, The method for inspecting a pouch-type secondary battery according to claim 12, wherein the air injection unit injects air through the air hole onto the first surface of the pouch-type secondary battery.

Images