Device for pressing pouch-type secondary battery and method for pressing pouch-type secondary battery using same

Abstract

The present invention relates to a device for pressing a pouch-type secondary battery and a method for pressing the pouch-type secondary battery using same and, more particularly, to: a device for pressing a pouch-type secondary battery that includes a battery case having a pocket part for accommodating an electrode assembly and an extension part for collecting gas generated during an activation step; and a method for pressing the pouch-type secondary battery using same. The device includes: a pair of pressing plates positioned so as to face one surface and the other surface of the pocket part of the battery case; and a pair of auxiliary plates positioned so as to face one surface and the other surface of the extension part of the battery case, wherein the auxiliary plates cool the extension part to prevent damage caused by excessive expansion of a pouch.

Description

Pressurizing device for pouch-type secondary battery and pressurizing method for pouch-type secondary battery using the same

[0001] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0109257, filed August 14, 2024, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a pressurizing device for a pouch-type secondary battery and a pressurizing method for a pouch-type secondary battery using the same, and more specifically, to a pressurizing device for a pouch-type secondary battery capable of lowering the temperature of gas generated during an activation step and a pressurizing method for a pouch-type secondary battery 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] A typical pouch-type secondary battery manufacturing process includes inserting an electrode assembly into a battery case accommodating space made of a laminate sheet, injecting an electrolyte inside the battery case, sealing the case, and performing an activation step. In this activation step, a formation jig is used to pressurize the battery cell.

[0007] In this regard, Fig. 1 is a conceptual diagram of a pouch-type secondary battery pressurizing device according to the prior art. As illustrated in Fig. 1, it is common to interpose a secondary battery (10) between a pair of pressurizing plates (20), and then proceed with the activation step of the secondary battery (10) while pressing the pocket portion (12a) in which the electrode assembly is housed with the pressurizing plates (20).

[0008] In addition, during the activation stage, the lithium and electrolyte of the secondary battery chemically react to generate gas, and this gas is captured in the extension section (12b) and then removed during the degassing process.

[0009] However, the extension part (12b) expands due to the gas generated during the activation phase, which causes deformation of the pocket part (12a) including the extension part (12b), which may result in sealing failure, etc.

[0010] Of course, the above-mentioned problem can be solved by forming the extension part (12b) to a sufficiently large size, but in this case, another problem arises in that a large area of ​​laminate sheet is required, which increases the manufacturing cost accordingly.

[0011]

[0012] (Prior art literature)

[0013] (Patent Document 1) Korean Patent Publication No. 10-2023-0071075

[0014] In order to solve the above problems, the present invention aims to provide a pouch-type secondary battery pressurizing device capable of preventing deformation of a pocket portion due to gas generated during an activation step, and a secondary battery pressurizing method using the same.

[0015]

[0016] In order to achieve the above-described purpose, a pressurizing device for a pouch-type secondary battery according to the present invention is a pressurizing device for a pouch-type secondary battery including a battery case (12) in which a pocket part (12a) for accommodating an electrode assembly and an extension part (12b) for capturing a gas generated in an activation step are formed, and is characterized by including a pair of pressurizing plates (100) positioned so as to face one side and the other side of the pocket part (12a) of the battery case (12); and a pair of auxiliary plates (200) positioned so as to face one side and the other side of the extension part (12b) of the battery case (12).

[0017] In addition, in the pressurizing device of the pouch-type secondary battery according to the present invention, the auxiliary plate (200) is characterized in that it is a cooling member.

[0018] In addition, in the pressurizing device of the pouch-type secondary battery according to the present invention, the auxiliary plate (200) includes a first auxiliary plate (210) facing one side of the extension part (12b) and a second auxiliary plate (220) facing the other side of the extension part (12b), and is characterized in that it is driven to pressurize when the extension part (12b) expands due to gas capture.

[0019] In addition, in the pressurizing device of the pouch-type secondary battery according to the present invention, the pressurizing plate (100) includes a first pressurizing plate (110) facing one side of the pocket portion (12a) and a second pressurizing plate (120) facing the other side of the pocket portion (12a), and a first drive shaft (111) is provided on one side of the first pressurizing plate (110), a second drive shaft (121) is provided on the other side of the second pressurizing plate (120), a third drive shaft (211) is provided on one side of the first auxiliary plate (210), and a fourth drive shaft (221) is provided on the other side of the second auxiliary plate (220).

[0020] In addition, in the pressurizing device of the pouch-type secondary battery according to the present invention, the first driving shaft (111), the second driving shaft (121), the third driving shaft (211), and the fourth driving shaft (221) are each driven independently.

[0021] In addition, in the pressurizing device of the pouch-type secondary battery according to the present invention, the first driving shaft (111) and the third driving shaft (211) are characterized in that they are driven together.

[0022] In addition, the pressurizing device of the pouch-type secondary battery according to the present invention is characterized in that a first connecting shaft (212) connecting the first driving shaft (111) and the third driving shaft (211) to each other is provided.

[0023] In addition, in the pressurizing device of the pouch-type secondary battery according to the present invention, the third driving shaft (211) is characterized by including a third a guide bar (211a) extended by a certain length from the first auxiliary plate (210), a third b guide bar (211b) having one side fixed to the first connecting shaft (212), and a first elastic member (211c) interposed between the third a guide bar (211a) and the third b guide bar (211b).

[0024] In addition, in the pressurizing device of the pouch-type secondary battery according to the present invention, the first elastic member (211c) is characterized in that it is a coil spring.

[0025] In addition, in the pressurizing device of the pouch-type secondary battery according to the present invention, the second driving shaft (121) and the fourth driving shaft (221) are characterized in that they are driven together.

[0026] In addition, the pressurizing device of the pouch-type secondary battery according to the present invention is characterized in that a second connecting shaft (222) connecting the second driving shaft (121) and the fourth driving shaft (221) to each other is provided.

[0027] In addition, in the pressurizing device of the pouch-type secondary battery according to the present invention, the fourth driving shaft (221) is characterized by including a fourth a guide bar (221a) extended by a certain length from the second auxiliary plate (220), a fourth b guide bar (221b) having one side fixed to the second connecting shaft (222), and a second elastic member (221c) interposed between the fourth a guide bar (221a) and the fourth b guide bar (221b).

[0028] In addition, in the pressurizing device of the pouch-type secondary battery according to the present invention, the second elastic member (221c) is characterized in that it is a coil spring.

[0029] A method for pressurizing a pouch-type secondary battery using the pressurizing device of the aforementioned pouch-type secondary battery, comprising: (S1) a step of positioning the secondary battery between a pair of pressurizing plates; and (S2) an activation step of charging and discharging the secondary battery while pressing the secondary battery by moving the pair of pressurizing plates; characterized in that, prior to the step (S2), a step of positioning a pair of second auxiliary plates formed of a cooling member on both sides of an extension portion of the battery case is further included.

[0030] In addition, in the pouch-type secondary battery pressurization method according to the present invention, in the step (S2), a pair of second auxiliary plates are in close contact with the extension portion.

[0031]

[0032] According to the pressurizing device of a pouch-type secondary battery and the pressurizing method of a pouch-type secondary battery using the same according to the present invention, an auxiliary plate made of a cooling member that can be in close contact with one side or the other side of an extension for gas collection is provided, so that the volume of generated gas can be reduced, and this has the advantage of contributing to preventing deformation of a pocket part for storing an electrode assembly.

[0033] In addition, according to the pressurizing device of a pouch-type secondary battery and the pressurizing method of a pouch-type secondary battery using the same according to the present invention, an auxiliary plate made of a cooling member that can be in close contact with one side or the other side of an extension for gas collection is provided, so that the volume of generated gas can be reduced, and this has the advantage of contributing to saving laminate sheets by reducing the size of the extension for gas collection.

[0034]

[0035] Figure 1 is a conceptual diagram of a pouch-type secondary battery pressurizing device according to conventional technology.

[0036] Figure 2 is a perspective view of a pouch-type secondary battery.

[0037] FIG. 3 is a perspective view illustrating a pressurizing device of a pouch-type secondary battery according to the first embodiment of the present invention.

[0038] Figure 4 is a side view of the pressurizing device shown in Figure 3.

[0039] FIG. 5 is a perspective view illustrating a pressurizing device of a pouch-type secondary battery according to a second embodiment of the present invention.

[0040] Figure 6 is a side view of the pressurizing device of the pouch-type secondary battery illustrated in Figure 5 before the pressurizing plate and the auxiliary plate are brought into close contact with the secondary battery.

[0041] Fig. 7 is a side view of the pressurizing device of the pouch-type secondary battery illustrated in Fig. 5 after the pressurizing plate and the auxiliary plate are in close contact with the secondary battery.

[0042]

[0043] 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.

[0044] 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.

[0045]

[0046] Hereinafter, a pressurizing device for a pouch-type secondary battery according to the present invention and a pressurizing method for a pouch-type secondary battery using the same will be described.

[0047] Fig. 2 is a perspective view of a pouch-type secondary battery. Referring to Fig. 2, the pouch-type secondary battery will first be described. The pouch-type secondary battery (10) may be a pouch-type secondary battery configured to include a battery case (12) that houses an electrode assembly (not shown) in which a pair of electrode leads (11) are positioned facing each other, and a sealing portion (S) at the edge of the battery case (12).

[0048] First, the electrode assembly (not shown) housed in the battery case (12) may be formed of a jelly-roll type electrode assembly having a structure in which a separator is interposed between a long sheet-shaped negative electrode and a positive electrode and then rolled up, a stack type electrode assembly having unit cells having a structure in which rectangular positive and negative electrodes 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, but is not limited thereto.

[0049] 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. A conductive material and a binder may be mixed with the positive electrode active material, and a filler may be further added as needed.

[0050] 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. A conductive material and a binder may be additionally mixed into the negative electrode active material and coated on the negative electrode current collector.

[0051] The separator prevents shorting between the aforementioned negative electrode and positive electrode and allows only 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.

[0052]

[0053] Meanwhile, the battery case (12) may be composed of a pocket portion (12a) for storing the electrode assembly and an extension portion (12b) located near the pocket portion (12a) for capturing gas generated during the activation stage.

[0054] These battery cases (12) are manufactured using a laminate sheet composed of an outer covering layer, a metal layer, and an inner covering layer.

[0055] Since the inner covering layer is in 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.

[0056] Materials for the inner covering layer 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.

[0057] 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.

[0058] 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.

[0059]

[0060] FIG. 3 is a perspective view illustrating a pressurizing device of a pouch-type secondary battery according to the first embodiment of the present invention, and FIG. 4 is a side view of the pressurizing device illustrated in FIG. 3.

[0061] A secondary battery pressurizing device according to the first embodiment of the present invention for pressurizing a pouch-type secondary battery having the aforementioned configuration may be configured to include a pair of pressurizing plates (100) and a pair of auxiliary plates (200).

[0062] First, a pair of pressure plates (100) are positioned so as to face one side and the other side of the pocket portion (12a) of the battery case (12). Specifically, the pair of pressure plates (100) includes a first pressure plate (110) positioned so as to face one side of the pocket portion (12a) of the battery case (12), and a second pressure plate (120) positioned so as to face the other side of the pocket portion (12a) of the battery case (12).

[0063] At this time, a first driving shaft (111) is provided on one side of the first pressure plate (110), that is, on the opposite side that does not face the pocket portion (12a), and a separate driving means (not shown) is connected to the first driving shaft (111), thereby operating the first pressure plate (110) toward or away from the pocket portion (12a).

[0064] In addition, a second driving shaft (121) is provided on the opposite side of the second pressure plate (120), that is, the side not facing the pocket portion (12a), and a separate driving means (not shown) is connected to the second driving shaft (121), thereby operating the second pressure plate (120) toward or away from the pocket portion (12a).

[0065] It is preferable that the areas of the first pressure plate (110) and the second pressure plate (120) described above be such that they can completely cover the pocket portion (12a), and since they correspond to plates generally used in the activation stage of a pouch-type secondary battery, a more detailed description thereof will be omitted.

[0066] Next, a pair of auxiliary plates (200) will be described. The pair of auxiliary plates (200) are positioned so as to face one side and the other side of the extension portion (12b) of the battery case (12). Specifically, the pair of auxiliary plates (200) includes a first auxiliary plate (210) positioned so as to face one side of the extension portion (12b) of the battery case (12), and a second auxiliary plate (220) positioned so as to face the other side of the extension portion (12b) of the battery case (12).

[0067] At this time, a third driving shaft (211) is provided on one side of the first auxiliary plate (210), that is, on the opposite side that does not face the extension (12b), and a separate driving means (not shown) is connected to the third driving shaft (211), thereby operating the first auxiliary plate (210) toward or away from the extension (12b) side.

[0068] In addition, a fourth driving shaft (221) is provided on the opposite side of the second auxiliary plate (220), that is, the side not facing the extension (12b) side, and a separate driving means (not shown) is connected to the fourth driving shaft (221), thereby operating the second auxiliary plate (220) toward or away from the extension (12b) side.

[0069] Here, it is preferable that the auxiliary plate (200) is a cooling member. Specifically, it is preferable that either the first auxiliary plate (210) or the second auxiliary plate (220) is a cooling member, and it is more preferable that both the first auxiliary plate (210) and the second auxiliary plate (220) are configured as cooling members.

[0070] The gas generated in the activation stage moves to and is captured in the extension (12b). When at least one of the first auxiliary plate (210) and the second auxiliary plate (220) that are operated to be in close contact with the extension (12b) is configured as a cooling member, the temperature of the gas captured in the extension (12b) can be lowered.

[0071] Accordingly, the expansion of the extension (12b) due to gas can be minimized, thereby reducing deformation of the pocket (12a) including the extension (12b). Of course, even if the size of the extension (12b) is the same, when the second auxiliary plate (220) is provided, more gas can be captured, so it is possible to make the size of the extension (12b) relatively smaller, which can also contribute to reducing manufacturing costs through saving laminate sheets.

[0072] Meanwhile, the cooling member constituting the first auxiliary plate (210) and the second auxiliary plate (220) is not particularly limited as long as it can cool the gas captured in the extension (12b) by being in close contact with the extension (12b), but may be a metal plate such as aluminum with excellent thermal conductivity and having a refrigerant circulation pipe provided therein, a metal plate such as aluminum with excellent thermal conductivity and having a Peltier element provided therein, etc.

[0073] In addition, it is preferable that the areas of the first auxiliary plate (210) and the second auxiliary plate (220) have an area that can completely cover the extension (12b) so that they can be in close contact with one side or all parts of the other side of the extension (12b).

[0074] In the first embodiment described above, the first driving shaft (111), the second driving shaft (121), the third driving shaft (211), and the fourth driving shaft (221) can each be driven individually.

[0075]

[0076] FIG. 5 is a perspective view for explaining a pressurizing device of a pouch-type secondary battery according to a second embodiment of the present invention, FIG. 6 is a side view of the pressurizing device of the pouch-type secondary battery illustrated in FIG. 5 before the pressurizing plate and the auxiliary plate are brought into close contact with the secondary battery, and FIG. 7 is a side view of the pressurizing device of the pouch-type secondary battery illustrated in FIG. 5 after the pressurizing plate and the auxiliary plate are brought into close contact with the secondary battery.

[0077] A pressurizing device for a pouch-type secondary battery according to a second embodiment of the present invention will be described with reference to FIGS. 5 to 7. The pressurizing device for a secondary battery according to the second embodiment of the present invention may be configured to include a pair of pressurizing plates (100) and a pair of auxiliary plates (200), similar to the first embodiment.

[0078] However, unlike the first embodiment, the structure for driving the pressure plate (100) and the auxiliary plate (200) in the second embodiment is different, so only the different configurations will be described below.

[0079] A third driving shaft (211) is provided on one side of the first auxiliary plate (210), that is, on the opposite side that does not face the extension (12b), and a first connecting shaft (212) is positioned between the first driving shaft (111) and the third driving shaft (211) to connect them to each other.

[0080] Accordingly, when a separate driving means (not shown) connected to the first driving shaft (111) operates, the first driving shaft (111) and the third driving shaft (211) are structured to operate together, so that the first pressure plate (110) and the first auxiliary plate (210) are simultaneously operated to move toward or away from one side of the pocket portion (12a) and the extension portion (12b), respectively.

[0081] Meanwhile, the third driving shaft (211) may be configured to include a third guide bar (211a) extended by a certain length from the first auxiliary plate (210), a third guide bar (211b) having one side fixed to the first connecting shaft (212), and a first elastic member (211c) interposed between the third guide bar (211a) and the third guide bar (211b).

[0082] For example, the 3a guide bar (211a) has a cylindrical or square bar shape with an empty interior, the 3b guide bar (211b) has one end blocked and can slide along the internal space of the 3a guide bar (211a), and a first elastic member (211c) can be positioned inside the 3a guide bar (211a).

[0083] Of course, it is also possible to have a structure in which the inside of the 3b guide bar (211b) is empty and one end of the 3a guide bar (211a) is blocked, allowing sliding movement along the internal space of the 3b guide bar (211b).

[0084] When the third drive shaft (211) is configured as described above, the gas temperature can be quickly lowered because the first auxiliary plate (210) is in close contact with the extension (12b) before the gas is captured or from the beginning of the capture, and the extension (12b) can also be prevented from expanding excessively.

[0085] On the opposite side of the first auxiliary plate (210), that is, not facing the extension (12b) surface, a fourth driving shaft (221) is provided, while a second connecting shaft (222) is positioned between the second driving shaft (121) and the fourth driving shaft (221) to connect them to each other.

[0086] Accordingly, when a separate driving means (not shown) connected to the second driving shaft (121) operates, the second driving shaft (121) and the fourth driving shaft (221) are structured to operate together, so that the second pressure plate (120) and the second auxiliary plate (220) are operated simultaneously to move toward or away from the pocket portion (12a) and the extension portion (12b), respectively.

[0087] Meanwhile, the fourth driving shaft (221) may be configured to include a fourth a guide bar (221a) extended by a certain length from the second auxiliary plate (220), a fourth b guide bar (221b) having one side fixed to the second connecting shaft (222), and a second elastic member (221c) interposed between the fourth a guide bar (221a) and the fourth b guide bar (221b).

[0088] For example, the 4a guide bar (221a) has a cylindrical or square bar shape with an empty interior, the 4b guide bar (221b) has one end blocked and can slide along the internal space of the 4a guide bar (221a), and a second elastic member (221c) can be positioned inside the 4a guide bar (221a).

[0089] Of course, it is also possible to have a structure in which the inside of the 4b guide bar (221b) is empty and one end of the 4a guide bar (221a) is blocked, allowing sliding movement along the internal space of the 4b guide bar (221b).

[0090] When the fourth drive shaft (221) is configured as described above, the second auxiliary plate (220) is in close contact with the extension (12b) before the gas is captured or from the beginning of the capture, so that the gas temperature can be quickly lowered and the extension (12b) can also be prevented from expanding excessively.

[0091] Meanwhile, the first elastic member (211c) and the second elastic member (221c) described above may be coil springs, but there are no particular limitations as long as they can perform the same function.

[0092]

[0093] Next, a method for pressurizing a pouch-type secondary battery according to the present invention will be described. The method for pressurizing a pouch-type secondary battery according to the present invention includes a step of (S1) positioning a secondary battery between a pair of pressurizing plates, and an activation step of charging and discharging the secondary battery while pressing the secondary battery by moving the pair of pressurizing plates. In particular, before step (S2), the method may further include a step of positioning a pair of second auxiliary plates on both sides of an extension portion of a battery case.

[0094] At this time, it is preferable that the second auxiliary plate be a cooling element for lowering the temperature of the gas trapped in the extension. Here, the temperature of the cooling element is not particularly limited as long as it can lower the temperature of the trapped gas and thereby reduce the volume.

[0095] Meanwhile, a pair of second auxiliary plates positioned on both sides of the extension portion of the battery case can be in close contact with the extension portion and can press the extension portion with a certain force to prevent the extension portion from expanding excessively.

[0096]

[0097] 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.

[0098] (Explanation of symbols)

[0099] 10: Secondary batteries

[0100] 11: Electrode lead

[0101] 12: Battery case

[0102] 12a: Pocket section 12b: Extension section

[0103] 100: Pressurized plate

[0104] 110: First pressure plate

[0105] 111: First drive shaft

[0106] 120: Second pressure plate

[0107] 121: Second drive shaft

[0108] 200: Auxiliary plate

[0109] 210: First auxiliary plate

[0110] 211: Third drive shaft

[0111] 211a: 3a guide bar 211b: 3b guide bar

[0112] 211c: First elastic member

[0113] 212: First connecting shaft

[0114] 220: Second auxiliary plate

[0115] 221: 4th drive shaft

[0116] 221a: 4a guide bar 221: 4b guide bar

[0117] 221c: Second elastic member

[0118] 222: Second connecting shaft

Claims

1. A pressurizing device for a pouch-type secondary battery including a battery case having a pocket portion for storing an electrode assembly and an extension portion for capturing gas generated during an activation step, A pair of pressure plates positioned so as to face one side and the other side of the pocket portion of the battery case; and A pressurizing device for a pouch-type secondary battery, characterized in that it includes a pair of auxiliary plates positioned so as to face one side and the other side of the extension of the battery case.

2. In paragraph 1, A pressurizing device for a pouch-type secondary battery, characterized in that the auxiliary plate is a cooling member.

3. In paragraph 2, The above auxiliary plate includes a first auxiliary plate facing one side of the extension portion and a second auxiliary plate facing the other side of the extension portion, A pressurizing device for a pouch-type secondary battery characterized in that it is driven to pressurize when the extension part expands by gas capture.

4. In paragraph 3, The above pressure plate includes a first pressure plate facing one side of the pocket portion and a second pressure plate facing the other side of the pocket portion, A first driving shaft is provided on one surface of the first pressure plate, and a second driving shaft is provided on the other surface of the second pressure plate. A pressurizing device for a pouch-type secondary battery, characterized in that a third driving shaft is provided on one surface of the first auxiliary plate, and a fourth driving shaft is provided on the other surface of the second auxiliary plate.

5. In paragraph 4, A pressurizing device for a pouch-type secondary battery, characterized in that the first driving shaft, the second driving shaft, the third driving shaft, and the fourth driving shaft are each driven independently.

6. In paragraph 4, A pressurizing device for a pouch-type secondary battery, characterized in that the first driving shaft and the third driving shaft are driven together.

7. In paragraph 6, A pressurizing device for a pouch-type secondary battery, characterized in that it comprises a first connecting shaft connecting the first driving shaft and the third driving shaft to each other.

8. In paragraph 7, A pressurizing device for a pouch-type secondary battery, characterized in that the third driving shaft includes a third a guide bar extending a certain length from the first auxiliary plate, a third b guide bar having one side fixed to the first connecting shaft, and a first elastic member interposed between the third a guide bar and the third b guide bar.

9. In paragraph 8, A pressurizing device for a pouch-type secondary battery, characterized in that the first elastic member is a coil spring.

10. In paragraph 4, A pressurizing device for a pouch-type secondary battery, characterized in that the second driving shaft and the fourth driving shaft are driven together.

11. In paragraph 10, A pressurizing device for a pouch-type secondary battery, characterized in that it comprises a second connecting shaft connecting the second driving shaft and the fourth driving shaft to each other.

12. In paragraph 11, A pressurizing device for a pouch-type secondary battery, characterized in that the fourth driving shaft includes a fourth a guide bar extending a certain length from the second auxiliary plate, a fourth b guide bar having one side fixed to the second connecting shaft, and a second elastic member interposed between the fourth a guide bar and the fourth b guide bar.

13. In paragraph 12, A pressurizing device for a pouch-type secondary battery, characterized in that the second elastic member is a coil spring.

14. A method for pressurizing a pouch-type secondary battery using a pressurizing device for a pouch-type secondary battery described in any one of claims 1 to 13, (S1) a step of positioning the secondary battery between the pair of pressure plates; and (S2) An activation step of charging and discharging the secondary battery while pressing the secondary battery by moving the pair of pressurizing plates; including, A pouch-type secondary battery pressurizing method characterized in that it further includes a step of positioning a pair of second auxiliary plates made of a cooling member on both sides of an extension portion of the battery case before the above step (S2).

15. In paragraph 14, A pouch-type secondary battery pressurizing method characterized in that, in the above step (S2), a pair of second auxiliary plates are in close contact with the extension portion.

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