Pouch cell venting detection device

Abstract

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a pouch cell venting detection device that mechanically detects whether a pouch cell is vented using a volume change of the pouch cell and can immediately cut off voltage when venting occurs.

Description

[Technical Field]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0026196, filed February 28, 2022, and all contents disclosed in the documents of this Korean patent application are incorporated herein by reference.

[0002] The present invention relates to a pouch cell venting detection device, and more particularly to a pouch cell venting detection device that mechanically detects whether a pouch cell is vented using a change in the volume of the pouch cell and can immediately cut off voltage when venting occurs. [Background technology]

[0003] Secondary batteries are batteries that can be charged and discharged, unlike primary batteries, which cannot be recharged, and there are various types of secondary batteries, including nickel-cadmium batteries, nickel-metal hydride batteries, lithium-ion batteries, and lithium-ion polymer batteries. These secondary batteries are used not only in small products such as digital cameras, laptops, mobile phones, PDAs, and e-bikes, but also in large products that require high output, such as electric vehicles and hybrid vehicles, as well as in power storage devices and backup power storage devices that store surplus generated electricity and new renewable energy.

[0004] These secondary batteries are divided into pouch types and can types depending on the material of the battery case that houses the electrode assembly. Pouch types house the electrode assembly in a pouch made of a flexible polymer material that has no fixed shape, while can types house the electrode assembly in a case made of a fixed material such as metal or plastic.

[0005] As described above, the electrode assembly is housed inside the battery case, and the battery case is sealed after being filled with an electrolyte solution to operate as a battery. However, secondary batteries generate gas during the charging and discharging process. In particular, if the battery is overcharged or an internal short circuit occurs, excessive gas is generated inside the battery case, causing an increase in pressure inside the battery case, which leads to a decrease in battery performance.

[0006] Therefore, secondary batteries require a testing process or device that vents the internal gas to the outside. However, unexpected venting during the pre-safety assessment and testing of pouch-type cells can not only cause contamination of the surrounding test area but also lead to accidents due to electrolyte leakage from the venting point and insulation breakdown. Furthermore, the venting process of a secondary battery can also allow external air to flow into the battery, which not only reduces battery performance but also causes oxygen to react inside the battery, leading to battery fire or explosion, posing a serious threat to user safety. Therefore, a device that can instantly measure venting and shut off the voltage during pouch-type cell testing was needed.

[0007] Therefore, in the past, gas sensors were used to detect whether pouch cells were vented. However, gas sensors are expensive products, which is not only undesirable from an economic standpoint, but also requires continuous monitoring by the user. Therefore, there is a need for the development of devices and apparatus that can automatically measure and activate venting without the need for expensive sensors. Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been devised to solve the above problems, and an object of the present invention is to provide a pouch cell venting detection device that mechanically detects whether a pouch cell is vented using a change in the volume of the pouch cell, and can immediately cut off voltage when venting occurs. [Means for solving the problem]

[0009] A pouch cell venting detection device according to a first embodiment of the present invention is a device for detecting whether a pouch cell including a pouch case and an electrode lead protruding from one side of the pouch case is vented, and includes a main body, a rotation means provided on one side of the main body, a rotation part rotatably coupled to one side of the main body by the rotation means and having a joint surface formed on one side that contacts the electrode lead, a support base provided on the other side of the rotation part facing the pouch case, and a cell pressing block coupled to an end of the support base and having a pressing surface formed to pressurize the outer surface of the pouch case.

[0010] The cell pressurizing block transmits the pressure caused by the increase in volume of the pouch case to the rotating part via the support base, and the rotating part rotates in a first direction due to the pressure transmitted via the support base, and the connection with the electrode lead can be maintained at the connection surface.

[0011] The rotation means may include a first shaft member protruding from one surface of the main body, and a first torsion spring connecting the first shaft member and the rotation portion and providing a rotational force to the rotation portion.

[0012] The first torsion spring transmits a rotational force generated as the rotating part rotates in a first direction to the rotating part, and the rotating part rotates in a second direction due to the rotational force, and the connection with the electrode lead at the connection surface can be released.

[0013] The main body may include a stepped lead placement portion on which the electrode lead is placed.

[0014] The rotating part may be made of a conductive material.

[0015] The rotating part may have a connection terminal formed on the other side of the rotating means to be connected to an external device.

[0016] The joining surface can be formed into an outwardly convex curved surface.

[0017] The joining surface may be formed such that the radius of curvature decreases toward the side where the pouch case is located.

[0018] The support base may be hinged on the other side of the rotating part.

[0019] The cell pressurizing block may be formed of an insulating material.

[0020] The pressure surface can be formed into an outwardly convex curved surface.

[0021] The device may further include a support means provided on one surface of the body and configured to support the rotating part by applying pressure in a first direction at an end of the rotating part.

[0022] The support means may include a second shaft member protruding from one surface of the main body, a torsion arm supporting the rotating part, and a second torsion spring connecting the second shaft member and the torsion arm and providing a rotational force to the torsion arm.

[0023] In the pouch cell venting detection device according to the second embodiment of the present invention, the support stand may include a first support stand having a hollow space with one side open, a second support stand having one side end coupled to the cell pressurizing block and the other side end inserted into the hollow space of the first support stand, and a compression spring inserted into the hollow space of the first support stand and disposed between the other closed side of the first support stand and the second support stand to provide elastic force to the second support stand. [Effects of the Invention]

[0024] A pouch cell venting detection device according to the present invention is a device for detecting whether a pouch cell including a pouch case and an electrode lead protruding from one side of the pouch case is vented, and includes: a main body; a rotation means provided on one side of the main body; a rotation part rotatably coupled to one side of the main body by the rotation means and having a joint surface formed on one side that contacts the electrode lead; a support base provided on the other side of the rotation part toward the pouch case; and a cell pressure block coupled to an end of the support base and having a pressure surface that presses the outer surface of the pouch case. Thus, the device can mechanically detect whether the pouch cell is vented using a change in volume of the pouch cell, and can immediately cut off voltage when venting occurs. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a perspective view illustrating a venting detection device for a pouch cell according to a first embodiment of the present invention. [Figure 2] 1 is a side view illustrating a pouch cell venting detection device according to a first embodiment of the present invention attached to the pouch cell. FIG. [Figure 3] 1 is a perspective view illustrating a main body of a pouch cell venting detection device according to a first embodiment of the present invention. [Figure 4] 1 is a perspective view illustrating a rotating means of a pouch cell venting detection device according to embodiment 1 of the present invention. FIG. [Figure 5] 1 is a perspective view illustrating a rotating part of a pouch cell venting detection device according to embodiment 1 of the present invention. [Figure 6] 1 is an enlarged side view of a cell pressurizing block and a support stand of a pouch cell venting detection device according to a first embodiment of the present invention. [Figure 7] 1 is a side view illustrating the operation of the pouch cell venting detection device according to embodiment 1 of the present invention before venting of the pouch cell occurs. FIG. [Figure 8]1 is a side view illustrating the operation of the pouch cell venting detection device according to embodiment 1 of the present invention after venting of the pouch cell occurs. FIG. [Figure 9] FIG. 10 is a side view of a pouch cell venting detection device according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] The present invention will now be described in detail with reference to the accompanying drawings, in order to enable those skilled in the art to easily carry out the present invention. However, the present invention may be embodied in various different forms and should not be construed as being limited to the following embodiments.

[0027] In order to clearly explain the present invention, detailed descriptions of parts that are not relevant to the explanation or related known technologies that may obscure the gist of the present invention are omitted, and in this specification, when referring to components in each drawing, the same or similar reference symbols are used throughout the specification for the same or similar components.

[0028] Furthermore, the terms and words used in this specification and claims should not be interpreted in a limited way to their ordinary or dictionary meanings, but should be interpreted in a way that is consistent with the technical idea of ​​the present invention, in accordance with the principle that inventors can appropriately define the concepts of terms in order to best explain their inventions.

[0029] Embodiment 1 Fig. 1 is a perspective view illustrating a pouch cell venting detection device according to embodiment 1 of the present invention, and Fig. 2 is a side view illustrating a state in which the pouch cell venting detection device according to embodiment 1 of the present invention is attached to the pouch cell.

[0030] 1 and 2, the pouch cell venting detection device according to the present invention is a device for detecting whether a pouch cell 10 including a pouch case 11 and an electrode lead 12 protruding from one side of the pouch case 11 is vented, and includes a main body 100, a rotating means 200, a rotating unit 300, a support stand 400, and a cell pressurizing block 500.

[0031] The rotation means 200 is provided on one side of the main body 100, and the rotation unit 300 is rotatably coupled to the rotation means 200 on one side of the main body 100, and has a contact surface 310 on one side that contacts the electrode lead 12. The support 400 is provided on the other side of the rotation unit 300 facing the pouch case 11, and the cell pressure block 500 is coupled to an end of the support 400, and has a pressure surface 510 that presses the outer surface of the pouch case 11.

[0032] As described above, in the present invention, since the cell pressure block 500 applies pressure to the outer surface of the pouch case 11, the cell pressure block 500 and the support base 400 move as the volume of the pouch cell 10 changes, which causes the rotation of the rotating unit 300 connected to the support base 400. As a result, the change in the volume of the cell can be used to mechanically detect whether the pouch cell 10 is venting. When venting occurs, the connection between the rotating unit 300 and the electrode lead 12 is released, thereby immediately cutting off the voltage.

[0033] Hereinafter, each component of the pouch cell venting detection device will be described in detail with reference to FIGS.

[0034] FIG. 3 is a perspective view illustrating a main body of the pouch cell venting detection device according to the first embodiment of the present invention. FIG. 4 is a perspective view illustrating a rotation means of the pouch cell venting detection device according to the first embodiment of the present invention. FIG. 5 is a perspective view illustrating a rotation unit of the pouch cell venting detection device according to the first embodiment of the present invention. FIG. 6 is an enlarged side view of a cell pressurizing block and a support stand of the pouch cell venting detection device according to the first embodiment of the present invention. FIG. 7 is a side view illustrating the operation of the pouch cell venting detection device according to the first embodiment of the present invention before venting of the pouch cell occurs. FIG. 8 is a side view illustrating the operation of the pouch cell venting detection device according to the first embodiment of the present invention after venting of the pouch cell occurs. FIG. 9 is a side view illustrating the pouch cell venting detection device according to the second embodiment of the present invention.

[0035] 2 and 3, the main body 100 is the central component of the pouch cell venting detection device, and may be configured to couple the rotating means 200 and the rotating unit 300, and may be configured to be installed in a cycle chamber, a high-temperature storage chamber, or a die during a test process in which the pouch cell venting detection device according to the present invention is used. However, the pouch cell venting detection device according to the present invention is not necessarily used during a test process, and may also detect whether or not a pouch cell 10 is vented during use by being installed in a secondary battery module.

[0036] The shape of the main body 100 is not particularly limited, but may have at least one flat surface so that the rotating part 300 can easily rotate when connected to it, and a connection hole to which the rotating means 200 is connected may be formed in the flat surface or through the flat surface and the other surface.

[0037] Meanwhile, the main body 100 may include a stepped lead placement portion 110 on one side thereof so that the electrode lead 12 can be placed thereon. This allows the electrode lead 12 to be stably placed on one side of the main body 100, and the connection with the rotating part 300 to be easily maintained or released. There is no limitation on the height of the step of the lead placement portion 110, but it is preferable that the width and length of the step be the same as or greater than the width and length of the electrode lead 12 to ensure stable placement of the electrode lead 12.

[0038] Next, the structure of the rotating means 200, the rotating part 300, the support base 400 and the cell pressurizing block 500 and the operation of the venting detection device for the pouch cell 10 based on the operation of each component will be described.

[0039] 2 and 4, the rotation means 200 may be provided on one side of the main body 100 and configured to fix the rotation unit 300 to the main body 100. In addition, the rotation means 200 may be configured to rotate the rotation unit 300 in a first direction or a second direction opposite to the first direction. Here, the first direction may refer to a clockwise direction with reference to FIG. 2, and the second direction may refer to a counterclockwise direction with reference to FIG. 2. The rotation means 200 may include a first shaft member 210 and a first torsion spring 220. The first shaft member 210 is coupled to protrude from one side of the main body 100, and the first torsion spring 220 couples the first shaft member 210 to the rotation unit 300 and provides a rotational force to the rotation unit 300. Here, the rotational force may be a force generated by the elastic force of the first torsion spring 220. When the rotating unit 300 is rotated by the pressure transmitted by the cell pressure block 500 and the support base 400, the first torsion spring 220 of the rotating means 200 generates a rotational force due to torsion, and the rotating unit 300 can be rotated by the rotational force. The operation of the rotating unit 300 by the rotating means 200 will be described in more detail below.

[0040] Meanwhile, the first torsion spring 220 may be formed in a shape that wraps around the outer circumferential surface of the first shaft member 210, but is not necessarily limited to this. The first shaft member may be formed hollow, and the first torsion spring may be inserted into the hollow.

[0041] 2 and 5, the rotating part 300 is configured to be rotatably coupled to one surface of the main body 100 by the rotating means 200, and is configured to maintain or cut off voltage by connecting or disconnecting from the electrode lead 12. For this purpose, the rotating part 300 of the present invention may be formed of a conductor.

[0042] Meanwhile, the rotating part 300 may have a contact surface 310 that contacts the electrode lead 12 on one side based on the position of the rotating means 200 connected to the rotating part 300, and a connection terminal 320 that is connected to an external device on the other side based on the rotating means 200. Here, the external device may refer to a current or voltage measuring device, and when the connection between the electrode lead 12 and the contact surface 310 is released due to the rotation of the rotating part 300, the voltage is cut off, and it is possible to detect whether venting has occurred in the external device connected to the connection terminal 320.

[0043] Meanwhile, the bonding surface 310 may be formed as an outwardly convex curved surface. The rotating part 300 is configured to rotate in a first direction or a second direction, and the bonding surface 310 is a surface of the rotating part 300 that bonds with the electrode lead 12. Therefore, in order to maintain the bond with the electrode lead 12 even when the rotating part 300 rotates by a predetermined angle, the bonding surface 310 may be formed as an outwardly convex curved surface. Also, the bonding surface 310 should be formed as a curved surface in order to minimize damage to the electrode lead 12.

[0044] In addition, the bonding surface 310 may be formed such that the radius of curvature decreases toward the side where the pouch case 11 is located. That is, the curved surface of the bonding surface 310 may be formed asymmetrically rather than with a constant radius of curvature. When the rotating part 300 rotates in the first direction, the pouch case 11 is in an expanded state before venting occurs, so the bonding between the bonding surface 310 and the electrode lead 12 needs to be maintained. Here, the first direction may refer to the direction in which the rotating unit 300 rotates toward the side where the pouch case 11 is located. If the bonding surface 310 is formed so that the radius of curvature of the bonding surface 310 decreases toward the side where the pouch case 11 is located and the radius of curvature increases toward the side opposite the side where the pouch case 11 is located, the bonding between the bonding surface 310 and the electrode lead 12 can be maintained even if the rotating unit 300 rotates by a predetermined angle in the first direction, and the bonding between the bonding surface 310 and the electrode lead 12 can be released when the rotating unit 300 rotates by the same angle in the second direction as the predetermined angle.

[0045] 2 and 6, the support base 400 is provided on the other side of the rotating unit 300 facing the pouch case 11, connects the cell pressing block 500 to the rotating unit 300, and can transmit the pressing force transmitted from the cell pressing block 500 to the rotating unit 300 or the rotational force generated by the rotating unit 300 or the rotating means 200 to the cell pressing block 500. The support base 400 can be hinged on the other side of the rotating unit 300, thereby transmitting the pressing force and rotational force generated in various directions to the rotating unit 300 or the cell pressing block 500 with minimized loss. Additionally, as shown in FIG. 6, the support base 400 can be hinged to the cell pressing block 500, minimizing loss of the pressing force and rotational force.

[0046] 2, the cell pressurizing block 500 is configured to pressurize the outer surface of the pouch case 11. Specifically, a pressurizing surface 510 formed in an outwardly convex curved surface can pressurize the outer surface of the pouch case 11. This allows the pressurizing force caused by the volume change of the pouch to be effectively transmitted, and even when the cell pressurizing block 500 comes into contact with the pouch case 11, damage to the pouch case 11 can be minimized.

[0047] On the other hand, the cell pressurizing block 500 is configured to transmit only the pressurizing force due to the volume change of the pouch case 11, and can be made of an insulating material.

[0048] Hereinafter, the operation process of the pouch cell venting detection device according to the present invention will be described in detail with reference to FIGS.

[0049] During the charge / discharge process of the pouch cell 10, a reaction between the electrodes and the electrolyte inside the cell generates gas, which causes the pouch case 11 to expand and increase the volume of the pouch cell 10. Here, the pressure surface 510 of the cell pressure block 500 presses the outer surface of the pouch case 11, and the cell pressure block 500 transmits the pressure, with which the pouch cell 10 presses the cell pressure block 500 due to the increase in volume of the pouch case 11, to the rotating unit 300 in direction D1 via the support 400. The rotating unit 300 can rotate in the first direction R1 due to the pressure transmitted via the support 400. However, even when rotating in the first direction R1, the connection between the electrode lead 12 and the connecting surface 310 of the rotating unit 300 can still be maintained. That is, when the pouch case 11 expands and the volume of the pouch cell 10 increases, this is the state before venting of the pouch cell 10 occurs, so even if the rotating part 300 rotates due to the applied pressure, the connection with the electrode lead 12 must be maintained, and the voltage is not cut off. Meanwhile, when the rotating part 300 rotates, a rotational force in the second direction R2 is generated by the elasticity of the first torsion spring 220, but since the applied pressure due to the increase in the volume of the pouch case 11 is greater, the rotating part 300 can rotate in the first direction R1.

[0050] However, when venting occurs, the volume of the pouch cell 10 decreases rapidly, and the volume of the expanded pouch case 11 also decreases rapidly. As a result, the pressure applied to the cell pressurizing block 500 also decreases rapidly, and the magnitude of the second-direction rotational force generated by the first-direction rotation of the rotating part 300 increases.

[0051] Therefore, the first torsion spring 220 of the rotating means 200 transmits a rotational force generated as the rotating part 300 rotates in a first direction to the rotating part 300, and the rotating part 300 rotates in a second direction due to the rotational force, so that the connection with the electrode lead 12 at the connection surface 310 is released. Here, the release of the connection with the electrode lead 12 means that venting has occurred in the pouch cell 10, and may mean that the rotating part 300, which is made of a conductor, is separated from the electrode lead 12, thereby releasing the electrical connection and cutting off the voltage.

[0052] As described above, the pouch cell venting detection device according to the present invention rotates in a first direction or a second direction depending on the pressure applied due to the volumetric increase or decrease of the pouch case 11 and the magnitude of the rotational force of the first torsion spring 220, and the connection between the connection surface 310 of the rotating part 300 and the electrode lead 12 is maintained or released, thereby mechanically detecting whether the pouch is vented and cutting off the voltage. This is more economical than expensive gas sensors, significantly reduces the possibility of malfunction, and can more accurately detect whether venting is occurring and automatically cut off the voltage, ensuring safety during the testing process of the pouch cell 10.

[0053] 2, 7, and 8, the pouch cell venting detection device according to the present invention may further include a support means 600 provided on one side of the body 100 and configured to support the rotating unit 300 by applying pressure to the rotating unit 300 in a first direction at an end of the rotating unit 300. Here, the support means 600 applying pressure to the rotating unit 300 in the first direction may mean that the support means 600 applies pressure to the rotating unit 300 in the opposite direction to prevent the rotating unit 300 from rotating in a direction that would release the connection with the electrode lead 12 or from rotating in a direction away from the pouch case 11. In other words, the support means 600 prevents the rotating unit 300 from rotating in the second direction when venting has not occurred, thereby preventing the connecting surface 310 of the rotating unit 300 from releasing the connection with the electrode lead 12, thereby reducing the risk of malfunction of the device.

[0054] The support means 600 may include a second shaft member 610 protruding from one side of the main body 100, a torsion arm 620 supporting the rotating part 300, and a second torsion spring connecting the second shaft member 610 and the torsion arm 620 and providing a rotational force to the torsion arm 620, thereby preventing the rotating part 300 from rotating in the second direction before venting occurs.

[0055] Embodiment 2 The second embodiment of the present invention differs from the first embodiment in that the support 400 according to the first embodiment is made up of a first support 410 and a second support 420, and further includes a compression spring 430 provided between the first support 410 and the second support 420. Therefore, the other configurations of the pouch cell venting detection device can be understood in the same way as those described and illustrated in the drawings in the first embodiment above, and the same effects can be expected.

[0056] FIG. 9 is a side view of a pouch cell venting detection device according to a second embodiment of the present invention.

[0057] 9, the support 400 according to the second embodiment of the present invention may include a first support 410, a second support 420, and a compression spring 430. The first support 410 has a hollow with one side open, and the second support 420 has one end connected to the cell pressure block 500 and the other end inserted into the hollow of the first support 410. The compression spring 430 is inserted into the hollow of the first support 410 and is provided between the other closed side of the first support 410 and the second support 420 to provide elastic force to the second support 420.

[0058] When the volume of the pouch case increases, the rotating unit 300 rotates in the first direction due to the pressure applied to the cell pressure block 500 and the support 400. At this time, the compression spring 430 is also compressed between the first support 410 and the second support 420. However, if venting occurs momentarily, the pressure weakens, and the elastic force of the compression spring 430 generates a rotational force that rotates the rotating unit 300 in the second direction.

[0059] As described above, the pouch cell venting detection device according to the second embodiment of the present invention includes the compression spring 430 between the first support 410 and the second support 420, and thus obtains a rotational force due to the linear elastic force of the compression spring 430 in addition to the rotational force of the first torsion spring 220, and can quickly detect the occurrence of venting and cut off the voltage at the same time.

[0060] The present invention has been described above using limited embodiments and drawings, but the present invention is not limited thereto, and various implementations are possible within the technical spirit of the present invention and the scope of the claims set forth below by a person having ordinary skill in the art to which the present invention pertains. [Explanation of symbols]

[0061] 10 pouch cells 11 Pouch Case 12 electrode leads 100 Main body 110 Lead placement section 200 Rotation means 210 1st shaft member 220 First torsion spring 300 Rotating Part 310 Joint surface 320 connection terminal 400 Support stand 410 1st support stand 420 2nd support stand 430 Compression Spring 500 cell pressure block 510 Pressure Surface 600 Support means 610 2nd shaft member 620 torsion arm

Claims

1. An apparatus for detecting whether a pouch cell is vented, the apparatus comprising: a pouch case; and an electrode lead protruding from one side of the pouch case, a main body; a rotating means provided on one surface of the main body; a rotating part which is rotatably coupled to one surface of the main body by the rotating means and has a joining surface formed on one side thereof which comes into contact with the electrode lead; a support base provided on the other side of the rotating unit facing the pouch case; a cell pressurizing block coupled to an end of the support base and having a pressurizing surface for pressing the outer surface of the pouch case.

2. The cell pressurizing block is A pressure force caused by an increase in the volume of the pouch case is transmitted to the rotating part via the support base, The rotating part is The pouch cell venting detection device according to claim 1 , wherein the pouch cell rotates in a first direction by the pressure transmitted through the support base, and the joining surface maintains the joining with the electrode lead.

3. The rotating means is a first shaft member protruding from one surface of the main body; The pouch cell venting detection device according to claim 1 or 2, further comprising a first torsion spring that couples the first shaft member and the rotating portion and provides a rotational force to the rotating portion.

4. The first torsion spring transmitting a rotational force generated as the rotating part rotates in a first direction to the rotating part; The rotating part is The pouch cell venting detection device according to claim 3 , wherein the pouch cell is rotated in a second direction by the rotational force, and the joining surface is released from the electrode lead.

5. The main body portion is The pouch cell venting detection device according to claim 1 or 2, further comprising a stepped lead placement portion on which the electrode lead is placed.

6. The rotating part is The pouch cell venting detection device according to claim 1 or 2, which is formed of a conductive material.

7. The rotating part is The pouch cell venting detection device according to claim 1 or 2, further comprising a connection terminal formed on the other side of the rotating means for connection to an external device.

8. The joining surface is The pouch cell venting detection device according to claim 1 or 2, which is formed into an outwardly convex curved surface.

9. The joining surface is The venting detection device for a pouch cell according to claim 8, wherein the radius of curvature is reduced toward the side where the pouch case is located.

10. The support base is The pouch cell venting detection device according to claim 1 or 2, wherein the other side of the rotating part is hinged.

11. The cell pressurizing block is The pouch cell venting detection device according to claim 1 or 2, which is made of an insulating material.

12. The pressure surface is The pouch cell venting detection device according to claim 1 or 2, which is formed into an outwardly convex curved surface.

13. The pouch cell venting detection device according to claim 1 or 2, further comprising a support means provided on one surface of the main body and configured to support the rotating part by applying pressure in a first direction at an end of the rotating part.

14. The support means is a second shaft member protruding from one surface of the main body; a torsion arm that supports the rotating part; The pouch cell venting detection device according to claim 13, further comprising a second torsion spring that connects the second shaft member and the torsion arm and provides a rotational force to the torsion arm.

15. The support base is a first support base having a hollow space with one side open; a second support having one end connected to the cell pressurizing block and the other end inserted into the hollow of the first support; 3. The pouch cell vent detection device according to claim 1 or 2, further comprising: a compression spring inserted into the hollow of the first support base and provided between the closed other side of the first support base and the second support base to provide elastic force to the second support base.

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