Jig for pressurizing pouch-type secondary battery and method for inspecting pouch-type secondary battery using same

Abstract

The present invention relates to a jig for pressurizing a pouch-type secondary battery, and a method for inspecting a pouch-type secondary battery using same, wherein the jig for pressurizing a pouch-type secondary battery comprises: a first pressurizing unit including a first pressurizing plate provided such that a second side of a pouch-type secondary battery is settled; a second pressurizing unit provided so as to pressurize a first side of the pouch-type secondary battery, the second pressurizing unit including a second pressurizing plate provided with air holes formed such that a fifth side and a sixth side are in communication with each other; and an air injection unit provided so as to inject air onto the first side of the pouch-type secondary battery through the air holes.

Description

Pouch-type secondary battery pressurizing jig and pouch-type secondary battery inspection method using the same

[0001] This application claims the benefit of priority to Korean Patent Application No. 2024-0001279, filed January 4, 2024, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a pouch-type secondary battery pressurizing jig and a pouch-type secondary battery inspection method using the same, and more specifically, to a pouch-type secondary battery pressurizing jig capable of determining whether a pouch-type secondary battery is defective by pressing both sides of the pouch-type secondary battery and measuring the insulation resistance of the pouch-type secondary battery, and a pouch-type secondary battery inspection method using the same.

[0003]

[0004] As technological development and demand for mobile devices increase, rechargeable secondary batteries are increasingly being used as energy sources for a variety of mobile devices. Secondary batteries are also attracting attention as an energy source for electric and hybrid electric vehicles, offering an alternative to conventional gasoline and diesel vehicles that rely on fossil fuels.

[0005] Secondary batteries are classified into cylindrical and prismatic batteries, in which the electrode assembly is built into a cylindrical or prismatic metal can, and pouch-type batteries, in which the electrode assembly is built into a pouch-type case made of aluminum laminate sheet, depending on the shape of the battery case.

[0006] Figure 1 is a drawing for explaining a pouch-type secondary battery pressurizing jig according to the prior art.

[0007] Referring to Fig. 1, a pouch-type secondary battery (10) is placed on the upper surface of a lower jig (2), and the upper jig (1) is lowered to pressurize 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 and whether there is a defect is determined through a measuring unit.

[0008] When a conventional pouch-type secondary battery pressurizing jig pressurizes a pouch-type secondary battery (10), a surface pressure is generated between the pouch-type secondary battery (10) and the lower jig (2), and as a result, when the upper jig (1) rises, the pouch-type secondary battery (10) moves while attached to the lower surface of the upper jig (1), which causes a pickup error.

[0009]

[0010] (Prior art literature)

[0011] (Patent Document 1) Korean Patent Publication No. 2015-0054372

[0012]

[0013] In order to solve the above problems, the purpose is to provide a pouch-type secondary battery pressurizing jig that can prevent the occurrence of surface pressure on a pouch-type secondary battery after pressurizing the pouch-type secondary battery and to provide a pouch-type secondary battery inspection method using the jig.

[0014]

[0015] As a technical means for achieving the above purpose, a pouch-type secondary battery pressurizing jig according to one embodiment of the present invention is characterized by including a first pressurizing unit (100) including a first pressurizing plate (110) provided so that a second side (12) of a pouch-type secondary battery (10) is seated; a second pressurizing unit (200) including a second pressurizing plate (210) provided with an air hole (213) formed so that a fifth side (211) and a sixth side (212) are connected, and provided so as to pressurize the first side (11) of the pouch-type secondary battery (10); and an air injection unit (300) provided so as to inject air to the first side (11) of the pouch-type secondary battery (10) through the air hole (213).

[0016] In addition, in the pouch-type secondary battery pressurizing jig according to one embodiment of the present invention, the first pressurizing unit (100) is characterized by including: the first pressurizing plate (110) including a third surface (111) that contacts the second surface (12) of the pouch-type secondary battery (10); and a first drive unit (120) having an axis (121) connected to the fourth surface (112) of the first pressurizing plate (110) to support the first pressurizing plate (110) and moving the first pressurizing plate (110) toward the first direction.

[0017] In addition, in the pouch-type secondary battery pressurizing jig according to one embodiment of the present invention, the first pressurizing unit (100) is characterized in that it further includes a pressurizing sensor (130) that measures the force in the second direction when the pouch-type secondary battery (10) receives force in the second direction by the second pressurizing unit (200).

[0018] In addition, in the pouch-type secondary battery pressurizing jig according to one embodiment of the present invention, the first driving 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 by the pressure sensor (130).

[0019] In addition, in the pouch-type secondary battery pressurizing jig according to one embodiment of the present invention, the second pressurizing unit (200) is characterized by including: the second pressurizing plate (210) in contact with the first surface (11) of the pouch-type secondary battery (10); and a second driving unit (220) having a shaft (221) connected to the fifth surface (211) of the second pressurizing plate (210) and moving the second pressurizing plate (210) toward the second direction.

[0020] In addition, in the pouch-type secondary battery pressurizing jig according to one embodiment of the present invention, the second driving unit (220) is characterized in that it moves the second pressurizing plate (210) toward the second direction and provides force toward the second direction to the first surface (11) of the pouch-type secondary battery (10).

[0021] In addition, in the pouch-type secondary battery pressurizing jig according to one embodiment of the present invention, the second pressurizing plate (210) is characterized in that it is arranged spaced apart from the first pressurizing plate (110) in the first direction.

[0022] In addition, in the pouch-type secondary battery pressurizing jig according to one embodiment of the present invention, the air holes (213) are characterized in that a plurality are formed in the central portion of the second pressurizing plate (210) that contacts the first surface (11) of the pouch-type secondary battery (10).

[0023] In addition, in the pouch-type secondary battery pressurizing jig according to one embodiment of the present invention, the air injection unit (300) is characterized in that, when the first side (11) of the pouch-type secondary battery (10) is attached to the second pressurizing plate (210), air is injected to the first side (11) of the pouch-type secondary battery (10) to detach the pouch-type secondary battery (10) from the second pressurizing plate (210).

[0024] In addition, in a pouch-type secondary battery pressurizing jig according to one embodiment of the present invention, it is characterized by including a measuring unit (400) that measures insulation resistance between the pouch-type secondary battery (10) and the first pressurizing plate (110) or the second pressurizing plate (210).

[0025] In addition, in a pouch-type secondary battery pressurizing jig according to one embodiment of the present invention, it is characterized by further including a control unit that determines whether the pouch-type secondary battery (10) is defective through the insulation resistance measured through the measuring unit (400).

[0026] In addition, a method for inspecting a pouch-type secondary battery using a pouch-type secondary battery pressurizing jig according to one embodiment of the present invention is characterized by including: (S1) a step of placing the pouch-type secondary battery (10) on the first pressurizing plate (110); (S2) a step of pressing the pouch-type secondary battery (10) by moving the second pressurizing plate (210) toward the second direction; (S3) a step of measuring the insulation resistance of the pouch-type secondary battery (10) through the measuring unit (400); and (S4) a step of releasing the pressurization of the pouch-type secondary battery (10) by moving the second pressurizing plate (210) toward the first direction.

[0027] In addition, in the pouch-type secondary battery inspection method according to one embodiment of the present invention, in the step (S3), the control unit is characterized in that it determines whether the pouch-type secondary battery (10) is defective through the insulation resistance value of the pouch-type secondary battery (10) measured through the measuring unit (400).

[0028] In addition, in the pouch-type secondary battery inspection method according to one embodiment of the present invention, in the step (S4), the air injection unit (300) is characterized in that it injects air to the first surface (11) of the pouch-type secondary battery (10) through the air hole (213).

[0029]

[0030] As described above, according to the pouch-type secondary battery pressurizing jig and the pouch-type secondary battery inspection method using the same according to the present invention, the air injection unit injects air onto the first surface of the pouch-type secondary battery through the air hole formed in the second pressure plate, thereby preventing the occurrence of surface pressure and pickup errors of the pouch-type secondary battery.

[0031]

[0032] Figure 1 is a drawing for explaining a pouch-type secondary battery pressurizing jig according to the prior art.

[0033] Fig. 2 is a perspective view illustrating a pouch-type secondary battery pressurizing jig according to one embodiment of the present invention.

[0034] FIG. 3 is a drawing for explaining the first pressurizing section and the second pressurizing section of a pouch-type secondary battery pressurizing jig according to one embodiment of the present invention.

[0035] FIG. 4 is a drawing for explaining how the first pressurizing section and the second pressurizing section of the pouch-type secondary battery pressurizing jig according to one embodiment of the present invention pressurize the pouch-type secondary battery.

[0036] Fig. 5 is a perspective view for explaining a second press plate of a pouch-type secondary battery press jig according to one embodiment of the present invention.

[0037] Fig. 6 is a cross-sectional view for explaining the second pressure plate shown in Fig. 5.

[0038]

[0039] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail, so that those skilled in the art can easily implement the present invention. However, when describing the operating principles of preferred embodiments of the present invention in detail, if a detailed description of a related known function or configuration is judged to unnecessarily obscure the gist of the present invention, such detailed description will be omitted.

[0040] Additionally, the same drawing reference numerals are used for parts with similar functions and actions throughout the drawings. Throughout the specification, when a part is said to be connected to another part, this includes not only direct connections but also indirect connections with other elements intervening. Furthermore, inclusion of a component does not exclude other components unless specifically stated otherwise, but rather implies the inclusion of additional components.

[0041] Also, based on Fig. 3, the first direction is the 12 o'clock direction and the second direction is the 6 o'clock direction.

[0042]

[0043] Hereinafter, a pouch-type secondary battery pressurizing jig according to the present invention will be described.

[0044] First, the pouch-type secondary battery (10) includes a battery case, and the battery case forms an electrode assembly and a gas pocket using a laminate sheet composed of an inner covering layer, a metal layer, and an outer covering layer.

[0045] Since the inner covering layer comes into direct contact with the electrode assembly, it must have insulation and electrolytic resistance, and in order to seal it from the outside, the sealing area where the inner layers are thermally bonded must have excellent thermal bonding strength.

[0046] Materials for such inner covering layers may be selected from, but are not limited to, polyolefin resins such as polypropylene, polyethylene, polyethylene acrylic acid, and polybutylene, which have excellent chemical resistance and good sealing properties, polyurethane resins, and polyimide resins, and polypropylene, which has excellent mechanical properties such as tensile strength, rigidity, surface hardness, and impact strength, and excellent chemical resistance, is most preferable.

[0047] The metal layer in contact with the inner covering layer serves as a barrier layer that prevents moisture or various gases from penetrating into the battery from the outside, and a preferred material for this metal layer is an aluminum film that is lightweight and has excellent formability.

[0048] And the other side of the metal layer is provided with an outer covering layer, and this outer covering layer can use a heat-resistant polymer with excellent tensile strength, moisture permeability, and air permeability to protect the electrode assembly while ensuring heat resistance and chemical resistance, and examples thereof include, but are not limited to, nylon or polyethylene terephthalate.

[0049] The electrode assembly may be formed of, but is not limited to, a jelly-roll type electrode assembly having a structure in which a separator is interposed between long sheet-shaped cathodes and anodes and then rolled up, a stack type electrode assembly having unit cells in which rectangular cathodes and anodes are stacked with a separator interposed between them, a stack-folding type electrode assembly in which the unit cells are rolled up by a long separator film, or a lamination-stack type electrode assembly in which the unit cells are stacked with a separator interposed between them and attached to each other.

[0050] The positive electrode is composed of a positive electrode current collector and a positive electrode active material applied to the upper and lower surfaces of the positive electrode current collector.

[0051] The positive electrode current collector can generally have a thickness of 3 to 500 μm. There are no particular limitations on the material as long as it has high conductivity and does not cause chemical changes in the battery. For example, stainless steel, aluminum, nickel, titanium, calcined carbon, or aluminum or stainless steel surface-treated with carbon, nickel, titanium, silver, etc. can be used. In addition, in order to increase the adhesive strength of the positive electrode active material, the surface can be formed with fine irregularities, or various shapes such as films, sheets, foils, nets, porous bodies, foams, and non-woven bodies are possible.

[0052] Meanwhile, the positive electrode active material may be mixed with a conductive agent and a binder, and fillers may be added as needed.

[0053] The negative electrode is composed of a negative electrode current collector and a negative electrode active material applied to the lower and upper surfaces of the negative electrode current collector.

[0054] The negative electrode current collector is typically made to have a thickness of 3 to 500 μm. There are no particular limitations on the negative electrode current collector as long as it is conductive and does not cause chemical changes in the battery. For example, copper, stainless steel, aluminum, nickel, titanium, calcined carbon, copper or stainless steel surface-treated with carbon, nickel, charcoal, silver, etc., aluminum-cadmium alloy, etc. can be used.

[0055] In addition, the bonding strength of the negative electrode active material can be strengthened by forming fine irregularities on the surface, and it can be used in various forms such as films, sheets, foils, nets, porous bodies, foams, and non-woven fabrics.

[0056] Of course, a conductive material and a binder can be additionally mixed with the negative electrode active material and coated on the negative electrode current collector.

[0057] The separator prevents shorting between the aforementioned negative electrode and positive electrode and only allows the movement of lithium ions. The material of the separator is preferably one selected from among polyethylene, polypropylene, polyethylene / polypropylene double layer, polyethylene / polypropylene / polyethylene triple layer, polypropylene / polyethylene / polypropylene triple layer, and organic fiber filter paper, but is not limited thereto.

[0058]

[0059] FIG. 2 is a perspective view illustrating a pouch-type secondary battery pressing jig according to an embodiment of the present disclosure, FIG. 3 is a view illustrating a first pressing part and a second pressing part of a pouch-type secondary battery pressing jig according to an embodiment of the present disclosure, and FIG. 4 is a view illustrating a state in which the first pressing part and the second pressing part of a pouch-type secondary battery pressing jig according to an embodiment of the present disclosure pressurize a pouch-type secondary battery. In addition, FIG. 5 is a perspective view illustrating a second pressing plate of a pouch-type secondary battery pressing jig according to an embodiment of the present disclosure, and FIG. 6 is a cross-sectional view illustrating the second pressing plate illustrated in FIG. 5.

[0060] Referring to FIGS. 2 to 6, the pouch-type secondary battery pressurizing jig according to the present invention includes a first pressurizing unit (100), a second pressurizing unit (200), an air injection unit (300), a measuring unit (400), and a control unit (not shown).

[0061] First, the first pressurizing unit (100) may include a first pressurizing plate (110), a first driving unit (120), and a pressurizing sensor (130).

[0062] The first pressure plate (110) may be provided so that the second surface (12) of the pouch-type secondary battery (10) is secured thereto. For example, referring to FIG. 3, the second surface (12) of the pouch-type secondary battery (10) may be the lower surface of the pouch-type secondary battery (10), and the first pressure plate (110) may be provided so as to be positioned on the second direction side of the pouch-type secondary battery (10).

[0063] In addition, the first pressure plate (110) may include a third surface (111) positioned in the first direction and a fourth surface (112) positioned in the second direction. The third surface (111) of the first pressure plate (110) may be in contact with the second surface (12) of the pouch-type secondary battery (10). In addition, the shaft (121) of the first driving unit (120) may be connected to the fourth surface (112) of the first pressure plate (110).

[0064] The first driving unit (120) is connected to the fourth surface (112) of the first pressure plate (110) via the shaft (121), supports the first pressure plate (110), and can move the first pressure plate (110) toward the first direction.

[0065] For example, the first driving unit (120) may be provided to support the pouch-type secondary battery (10) or back up in response to the force in the second direction when the force is transmitted in the second direction by the second pressurizing unit (200). For example, the first driving unit (120) may be provided as a backup cylinder.

[0066] Additionally, the pressure sensor (130) may be provided to measure the force in the second direction when the pouch-type secondary battery (10) receives force in the second direction by the second pressure unit (200). This pressure sensor (130) may be provided as a press load cell.

[0067] At this time, the first driving unit (120) can provide a force in the first direction to the second side (12) of the pouch-type secondary battery (10) in response to the force in the second direction measured by the pressure sensor (130).

[0068] The second pressurizing unit (200) may include a second pressurizing plate (210) and a second driving unit (220). The second pressurizing plate (210) may be in contact with the first surface (11) of the pouch-type secondary battery (10). For example, referring to FIG. 3, the first surface (11) of the pouch-type secondary battery (10) may be the upper surface of the pouch-type secondary battery (10), and the second pressurizing plate (210) may be provided to be positioned on the first direction side of the pouch-type secondary battery (10).

[0069] In addition, the second pressure plate (210) may be arranged spaced apart from the first pressure plate (110) in the first direction. That is, the second pressure plate (210) and the first pressure plate (110) may be provided spaced apart from each other, and a pouch-type secondary battery (10) may be arranged in the gap formed between the first pressure plate (110) and the second pressure plate (210).

[0070] The second pressure plate (210) may include a fifth surface (211) positioned in the first direction and a sixth surface (212) positioned in the second direction. The sixth surface (212) of the second pressure plate (210) may be in contact with the first surface (11) of the pouch-type secondary battery (10). In addition, a shaft (221) of the second driving unit (220) may be connected to the fifth surface (211) of the second pressure plate (210).

[0071] Additionally, the sixth surface (212) of the second pressure plate (210) may be provided with a plate including Cu (or brass) to check whether there is current flow with the first surface (11) of the pouch-type secondary battery (10).

[0072] And the second pressure plate (210) may be provided with an air hole (213) formed so that the fifth side (211) and the sixth side (212) are in communication. A plurality of air holes (213) may be formed in the central portion of the second pressure plate (210) that contacts the first side (11) of the pouch-type secondary battery (10). For example, a plurality of air holes (213) may be arranged in the width or length corresponding to the size of the first side (11) of the pouch-type secondary battery (10).

[0073] The second driving unit (220) of the second pressurizing unit (200) has a shaft (221) connected to the fifth surface (211) of the second pressurizing plate (210) and can move the second pressurizing plate (210) toward the second direction. At this time, the second driving unit (220) can move the second pressurizing plate (210) toward the second direction and provide force toward the first surface (11) of the pouch-type secondary battery (10) toward the second direction.

[0074] Accordingly, the second pressurizing unit (200) may be provided to pressurize the first side (11) of the pouch-type secondary battery (10) through the second pressurizing unit (220).

[0075] The second pressurizing unit (200) causes the second driving unit (220) to move the second pressurizing plate (210) in the second direction to pressurize the pouch-type secondary battery (10), and the first pressurizing unit (100) can provide force in the first direction to the first driving unit (110) in response to the force in the second direction transmitted by the second pressurizing unit (200). The first pressurizing unit (100) and the second pressurizing unit (200) can pressurize the pouch-type secondary battery (10) in the first direction and the second direction.

[0076] Meanwhile, the air injection unit (300) may be provided to inject air to the first surface (11) of the pouch-type secondary battery (10) through the air hole (213) formed in the second pressure plate (210).

[0077] The air injection unit (300) may be provided to be positioned on the first direction side of the second pressure plate (210). In other words, the air injection unit (300) may be provided to be positioned on the first direction side of the second pressure plate (210), and the nozzle for injecting air may be arranged toward the air hole (213) to inject air in the second direction.

[0078] In addition, when the first side (11) of the pouch-type secondary battery (10) is attached to the sixth side (212) of the second pressure plate (210), the air injection unit (300) can inject air to the first side (11) of the pouch-type secondary battery (10) to detach the pouch-type secondary battery (10) from the second pressure plate (210).

[0079] For example, detaching the pouch-type secondary battery (10) from the second pressure plate (210) may mean that when the second pressure unit (200) presses the pouch-type secondary battery (10) and moves the second pressure plate (210) in the first direction, the air injection unit (300) sprays air against the first surface (11) of the pouch-type secondary battery (10) and then moves the second pressure plate (210) in the first direction to detach the pouch-type secondary battery (10) from the second pressure plate (210).

[0080] The occurrence of surface pressure and pickup errors in the pouch-type secondary battery (10) can be prevented by the air injection unit (300) and air hole (213).

[0081] The measuring unit (400) may be provided to measure insulation resistance between the pouch-type secondary battery (10) and the first pressure plate (110) or the second pressure plate (210). For example, the measuring unit (400) may contact the first pressure plate (110) or the second pressure plate (210) and both lead portions of the pouch-type secondary battery (10) using a conductive rubber to measure insulation resistance between the first pressure plate (110) or the second pressure plate (210) and the pouch-type secondary battery (10).

[0082] The method of measuring the insulation resistance of a pouch-type secondary battery (10) using a measuring unit (400) can be used to measure the insulation resistance using a method commonly known in the art, so a more detailed description will be omitted.

[0083] In addition, the control unit (not shown) may be equipped to determine whether the pouch-type secondary battery (10) is defective through the insulation resistance measured through the measuring unit (400). For example, the control unit (not shown) may measure the insulation of the pouch-type secondary battery (10) through the resistance measured between the pouch-type secondary battery (10) and the first pressure plate (110) or the second pressure plate (210) through the measuring unit (400), thereby determining whether the pouch-type secondary battery (10) is defective.

[0084] For example, a control unit (not shown) can preset a reference value for resistance, current, or voltage, and compare the resistance, current, or voltage measured through the measurement unit (400) with the preset reference value to determine whether the pouch-type secondary battery (10) is defective.

[0085] The method for determining whether a pouch-type secondary battery of a control unit (not shown) is defective can be implemented in various ways that are obvious to those skilled in the art, so a detailed description thereof is omitted.

[0086] This control unit (not shown) may be implemented in hardware, software, or a combination of hardware and software. The control unit may be implemented in the form of a computing device (operating device) such as a microprocessor, but is not limited thereto, and may be implemented in various forms apparent to those skilled in the art.

[0087]

[0088] Hereinafter, with reference to FIGS. 2 to 6, a method for inspecting a pouch-type secondary battery using a pouch-type secondary battery pressurizing jig according to one embodiment of the present invention will be described.

[0089] A pouch-type secondary battery inspection method according to the present invention includes: (S1) a step of placing a pouch-type secondary battery (10) on a first pressure plate (110); (S2) a step of moving a second pressure plate (210) in a second direction to pressurize the pouch-type secondary battery (10); (S3) a step of measuring the insulation resistance of the pouch-type secondary battery (10) through a measuring unit (400); and (S4) a step of moving the second pressure plate (210) in the first direction to release the pressurization of the pouch-type secondary battery (10).

[0090] For example, in step (S1), the pouch-type secondary battery (10) can be positioned so as to be secured against the third surface (111) of the first pressure plate (110).

[0091] In addition, in step (S3), the control unit (not shown) can determine whether the pouch-type secondary battery (10) is defective through the insulation resistance value of the pouch-type secondary battery (10) measured through the measuring unit (400). For example, in step (S3), the control unit (not shown) can compare the insulation resistance of the pouch-type secondary battery (10) measured through the measuring unit (400) with a preset reference value, and if the insulation resistance of the pouch-type secondary battery (10) is lower than the preset reference value, the pouch-type secondary battery (10) can be determined to be defective.

[0092] In addition, the insulation resistance value of the pouch-type secondary battery (10) measured before step (S1) can be measured in advance and compared with the insulation resistance value of the pouch-type secondary battery (10) measured in step (S3) to determine whether the pouch-type secondary battery (10) is defective.

[0093] In step (S4), the air injection unit (300) can inject air to the first side (11) of the pouch-type secondary battery (10) through the air hole (213). For example, when the second pressure plate (210) moves in the first direction, the air injection unit (300) can inject air to the first side (11) of the pouch-type secondary battery (10) so that the first side (11) of the pouch-type secondary battery (10) moves together while being attached to the sixth side (212) of the second pressure plate (210), thereby preventing a pickup error from occurring.

[0094]

[0095] As described above, specific parts of the present invention have been described in detail. To those skilled in the art, such specific descriptions are merely preferred embodiments, and the scope of the present invention is not limited thereby. It is obvious to those skilled in the art that various changes and modifications are possible within the scope and technical idea of ​​the present invention, and it is natural that such changes and modifications fall within the scope of the appended patent claims.

[0096] (Explanation of symbols)

[0097] 10: Pouch-type secondary battery

[0098] 11: Page 1 12: Page 2

[0099] 100: First pressurized unit

[0100] 110: First pressure plate

[0101] 111: Page 3 112: Page 4

[0102] 120: First drive unit 121: Shaft of the first drive unit

[0103] 200: Second pressurized unit

[0104] 210: Second pressure plate

[0105] 211: Page 5 212: Page 6

[0106] 213: Air hole

[0107] 220: Second drive unit 221: Shaft of second drive unit

[0108] 300: Air injection unit

[0109] 400: Measurement unit

Claims

1. A first pressurizing unit including a first pressurizing plate provided to allow a second side of a pouch-type secondary battery to be settled; A second pressurizing unit, which comprises a second pressurizing plate having air holes formed so that the fifth and sixth sides are connected to each other, and is provided to pressurize the first side of the pouch-type secondary battery; and A pouch-type secondary battery pressurizing jig, characterized by including an air injection unit configured to inject air onto a first surface of the pouch-type secondary battery through the air hole.

2. In paragraph 1, The above first pressurizing unit, The first pressure plate including a third surface that contacts the second surface of the pouch-type secondary battery; and A pouch-type secondary battery pressurizing jig characterized in that it includes a first driving unit that moves the first pressurizing plate in the first direction and an axis connected to the fourth surface of the first pressurizing plate to support the first pressurizing plate.

3. In paragraph 2, The above first pressurizing unit, A pouch-type secondary battery pressurizing jig characterized in that it further includes a pressurizing sensor that measures the force in the second direction when the pouch-type secondary battery receives force in the second direction by the second pressurizing unit.

4. In paragraph 3, The above first driving unit, A pouch-type secondary battery pressurizing jig characterized in that it provides a force toward a first direction to a second surface of the pouch-type secondary battery in response to a force toward the second direction measured by the pressure sensor.

5. In paragraph 1, The above second pressurizing unit, The second pressure plate in contact with the first surface of the pouch-type secondary battery; and A pouch-type secondary battery pressurizing jig characterized in that it includes a second driving unit that is connected to a fifth surface of the second pressurizing plate and moves the second pressurizing plate in the second direction.

6. In paragraph 4, A pouch-type secondary battery pressurizing jig, characterized in that the second driving unit moves the second pressure plate in the second direction and provides force in the second direction to the first surface of the pouch-type secondary battery.

7. In paragraph 1, A pouch-type secondary battery pressing jig, characterized in that the second pressing plate is arranged spaced apart from the first pressing plate in the first direction.

8. In paragraph 1, A pouch-type secondary battery pressurizing jig, characterized in that the air holes are formed in multiple numbers in the central portion of the second pressurizing plate that comes into contact with the first surface of the pouch-type secondary battery.

9. In paragraph 8, A pouch-type secondary battery pressurizing jig, characterized in that the air injection unit sprays air onto the first side of the pouch-type secondary battery when the first side of the pouch-type secondary battery is attached to the second pressure plate, thereby detaching the pouch-type secondary battery from the second pressure plate.

10. In paragraph 1, A pouch-type secondary battery pressing jig characterized by including a measuring unit for measuring insulation resistance between the pouch-type secondary battery and the first pressing plate or the second pressing plate.

11. In paragraph 10, A pouch-type secondary battery pressurizing jig further comprising a control unit that determines whether the pouch-type secondary battery is defective through the insulation resistance measured by the above-mentioned measuring unit.

12. A method for inspecting a pouch-type secondary battery using a pouch-type secondary battery pressurizing jig according to any one of clauses 1 to 11, (S1) A step of placing the pouch-shaped secondary battery on the first pressure plate; (S2) A step of moving the second pressure plate toward the second direction to pressurize the pouch-type secondary battery; (S3) a step of measuring the insulation resistance of the pouch-type secondary battery through the measuring unit; and (S4) A method for inspecting a pouch-type secondary battery, characterized by including a step of releasing the pressure of the pouch-type secondary battery by moving the second pressure plate toward the first direction.

13. In paragraph 12, In the above step (S3), A pouch-type secondary battery inspection method, characterized in that the control unit determines whether the pouch-type secondary battery is defective through the insulation resistance value of the pouch-type secondary battery measured by the measuring unit.

14. In paragraph 12, In the above step (S4), A pouch-type secondary battery inspection method, characterized in that the air injection unit injects air onto the first surface of the pouch-type secondary battery through the air hole.

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