Gas collection device

Abstract

The present invention relates to a gas collecting device, and provides a gas collecting device in which the loading, unloading and punching of a battery are automated and the collected gas can be transferred to a gas analyzer accurately and stably.

Description

[Technical Field]

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2022-0121422, filed on September 26, 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 gas collecting device, and more particularly to a gas collecting device in which the loading, unloading, and punching of a battery are automated and the collected gas can be transferred to a gas analyzer accurately and stably. [Background technology]

[0003] Generally, secondary batteries are batteries that can be used repeatedly through a discharging process, which converts chemical energy into electrical energy, and a charging process, which is the reverse of the discharging process. Types of secondary batteries include nickel-cadmium (Ni-Cd) batteries, nickel-metal hydride (Ni-MH) batteries, lithium metal batteries, lithium-ion (Li-ion) batteries, and lithium-ion polymer batteries. Among these secondary batteries, lithium secondary batteries, which have high energy density and voltage, a long cycle life, and a low self-discharge rate, have been commercialized and are widely used.

[0004] Lithium secondary batteries produce hydrogen, oxygen, nitrogen, carbon monoxide, carbon dioxide, and C through chemical reactions inside the battery. n H 2n-2 (n=2-5), C n H 2n (n=2-5), C n H 2n+2 A variety of gases are generated, including hydrocarbons (n=1-5) and other organic gases.

[0005] In addition, lithium secondary batteries degrade as a large amount of gas is generated due to electrolyte decomposition as a result of repeated charging and discharging, and this process varies depending on the battery design and usage. Therefore, analyzing the gas generated inside the battery and inferring the degradation mechanism of the battery is essential in the battery development process.

[0006] Therefore, it is very important to capture and accurately analyze the gases generated inside secondary batteries. Various gases are generated during the operation of lithium-ion batteries, and information on the composition and content of the generated gases can be useful for developing battery materials, optimizing battery manufacturing processes, and identifying the causes of battery failure. To achieve this, it is important to develop technology to capture the gases generated inside secondary batteries.

[0007] A method for capturing gas generated from a secondary battery is to house the battery in a diffusion chamber with a sealed space formed inside, form an opening in the battery case for gas discharge, and then diffuse the gas discharged through the opening into the diffusion chamber. If the diffused gas is then collected in a separate gas collection container, it is most desirable to have no gap between the battery and the internal space of the diffusion chamber in order to capture high concentrations of gas.

[0008] Recently, batteries are used in a wide range of industrial fields, and the performance required of batteries varies depending on the various battery application environments and conditions, and batteries are designed according to various specifications.

[0009] Conventionally, due to various battery designs, a diffusion chamber for gas collection is used separately depending on the battery size, and there is a problem that a new one must be manufactured or installed every time the battery model is changed.

[0010] Furthermore, the concentration of the gas transmitted to the analyzer or stored in the gas collection container varies greatly depending on the volume of the diffusion chamber, the size of the cell (analyte), and the amount of gas generated, which affects the analysis results.

[0011] Furthermore, since the battery is loaded and unloaded and punched manually, the gas collection process takes a long time and there is a risk of human error. In particular, internal damage and dangerous accidents can occur during punching.

[0012] There is a need for a precise, stable, automated gas collection technique that can solve the above problems. Summary of the Invention [Problem to be solved by the invention]

[0013] The present invention relates to a gas collection device, and aims to provide a gas collection device in which battery loading, unloading, punching, etc. are automated and which can accurately and stably transfer collected gas to a gas analyzer.

[0014] The technical problems that the present invention aims to solve are not limited to the above-mentioned technical problems, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0015] The gas collection device of the present invention includes a jig part in which a cylindrical battery is mounted; a boat part in which the jig part with the cylindrical battery mounted thereon is placed; a chamber body part having a battery accommodating space in which the boat part is accommodated and an opening formed at one end; a chamber cap part coupled to one end of the chamber body part so that one side covers the opening; a first driving part that moves the boat part into the battery accommodating space through the opening; a second driving part that brings the one end of the chamber body part and the one side of the chamber cap part into or away from each other; and a gas transmission flow path connected to the chamber body part and that transmits the target gas diffused in the battery accommodating space to a gas analysis unit. [Effects of the Invention]

[0016] The gas collection device of the present invention automates the replacement of jig parts, loading and unloading of batteries, and punching, and is capable of precise and rapid gas collection.

[0017] The gas collecting device of the present invention determines whether punching is complete by measuring the movement of the punching needle and the amount of pressure change, thereby preventing accidents such as internal breakdown of the battery and ensuring safety during gas collection. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a cross-sectional view showing a gas collection device of the present invention. [Figure 2] FIG. 2 is an enlarged cross-sectional view of a local area of ​​FIG. [Figure 3A] FIG. [Figure 3B] FIG. [Figure 4] FIG. [Figure 5] FIG. 4 is a cross-sectional view showing a battery storage section. [Figure 6] FIG. 10 is a conceptual diagram showing movement of a jig part. [Figure 7] FIG. 4 is a cross-sectional view showing a first driving unit. [Figure 8] FIG. 4 is a cross-sectional view showing a second driving unit. DETAILED DESCRIPTION OF THE INVENTION

[0019] The gas collection device of the present invention includes a jig part in which a cylindrical battery is mounted; a boat part in which the jig part with the cylindrical battery mounted thereon is placed; a chamber body part having a battery accommodating space in which the boat part is accommodated and an opening formed at one end; a chamber cap part coupled to one end of the chamber body part so that one side covers the opening; a first driving part that moves the boat part into the battery accommodating space through the opening; a second driving part that brings the one end of the chamber body part and the one side of the chamber cap part into or away from each other; and a gas transmission flow path connected to the chamber body part and that transmits the target gas diffused in the battery accommodating space to a gas analysis unit.

[0020] In the gas collection device of the present invention, when the longitudinal direction of the cylindrical battery is defined as a first direction, the chamber body extends in the first direction, the opening is formed at one end of the chamber body in the first direction, the boat is moved linearly in the first direction by the first driving unit, a punching needle is provided on one side of the chamber cap at a position facing the cylindrical battery, and the first driving unit moves the boat toward the chamber cap to form a perforation hole in the cylindrical battery with the punching needle.

[0021] In the gas collection device of the present invention, the jig portion is cylindrical and extends in a first direction, the cylindrical battery is attached to the jig portion so that the outer surface of the cylindrical battery is in close contact with the inner surface of the jig portion, and a needle insertion hole is formed at one end of the jig portion in the first direction.

[0022] In the gas collection device of the present invention, an electrolyte storage groove is formed on the inner surface of the jig part, and the electrolyte storage groove is located adjacent to a side wall where a needle insertion hole is located in the internal space of the jig part.

[0023] The gas collection device of the present invention includes a plurality of jig sections, each of which is fitted with a cylindrical battery, and further includes a battery storage section that houses the plurality of jig sections, and a battery transfer section that transfers the plurality of jig sections one by one from the battery storage section to the boat section.

[0024] In the gas collection device of the present invention, a first cylindrical battery is attached to some of the plurality of jig sections, and a second cylindrical battery is attached to other parts of the plurality of jig sections, and the first cylindrical battery and the second cylindrical battery have different outer diameters, and all of the plurality of jig sections have the same outer diameter.

[0025] In the gas collection device of the present invention, the battery storage unit includes a battery storage track in which the plurality of jig parts are stored in an aligned state; a battery discharge hole formed at one end of the battery storage track and discharging the plurality of jig parts one by one; and an elastic door attached to the edge of the entrance of the battery discharge hole and using a restoring force to prevent the plurality of jig parts from detaching from the battery storage unit. The boat unit moves between the external space of the chamber body and the battery accommodating space by the first driving unit, and the entrance of the battery discharge hole is located at a position spaced a predetermined distance from the boat unit so as to face the boat unit when it is located in the external space of the chamber body.

[0026] In the gas collection device of the present invention, the battery transmission unit includes a gripper that grips one of the plurality of jig units that is exposed in the battery discharge hole, a rotating member to which the gripper is attached at one end and that extends in a second direction perpendicular to the first direction, and an axial member that is located between the boat unit and the battery discharge hole when the chamber body unit is positioned in the external space and that extends in the first direction, and the axial member is coupled to the rotating member, and the rotating member rotates the axial member about a rotation axis.

[0027] In the gas collection device of the present invention, the first driving unit includes: a power transmission bar that extends in the first direction, penetrates the other end of the chamber body in the first direction, and has one end inserted into the chamber body; a movable member having one side to which the boat unit is connected and the other side to which the one end of the power transmission bar is connected; a first fixed frame to which the chamber body is fixed; a first movable frame to which the power transmission bar is fixed and which moves linearly in the first direction based on the first fixed frame; a shaft that threads into the first movable frame and is rotatably connected to the first fixed frame; and an electric motor that rotates the shaft.

[0028] In the gas collection device of the present invention, a sealing cover surrounding the power transmission bar is provided inside the chamber body, one end of the sealing cover is fused to the other side of the moving member, and the other end of the sealing cover is fused to the inner wall of the other end side of the chamber body.

[0029] In the gas collecting device of the present invention, the sealing cover is in the form of a bellows.

[0030] In the gas collection device of the present invention, the second driving unit includes a second moving frame to which the first fixed frame is fixed, a second fixed frame to which the chamber cap unit is fixed, and a pneumatic actuator that moves the second moving frame in the first direction based on the second fixed frame.

[0031] The gas collecting device of the present invention further includes the pressure sensor unit connected to the gas transmission channel, and the pressure sensor unit measures the pressure in the battery accommodating space.

[0032] The gas collecting device of the present invention further includes a control unit that controls the first driving unit, and the control unit is controlled based on the pressure measurement value output from the pressure sensor unit.

[0033] The gas collection device of the present invention further includes a manifold provided in the gas transmission channel, a dilution tank connected to the manifold by a channel, a vacuum pump connected to the manifold by a channel, a first valve that opens or closes the channel connecting the manifold and the chamber body, a second valve that opens or closes the channel connecting the manifold and the gas analysis unit, a third valve that opens or closes the channel connecting the manifold and the dilution tank, and a fourth valve that opens or closes the channel connecting the manifold and the vacuum pump, and the control unit controls the first valve, the second valve, the third valve, and the fourth valve based on a signal transmitted to the gas analysis unit.

[0034] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this description, the size and shape of components shown in the drawings may be exaggerated for clarity and convenience. Furthermore, terms specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intentions or practices of users and operators. Definitions of such terms should be based on the overall content of this specification.

[0035] In describing the present invention, it should be noted that the orientations or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "one side," and "other side" are based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships in which the product of the present invention is normally arranged when in use, and are merely for the purpose of explaining and simplifying the present invention. They do not present or imply that the displayed devices or elements must necessarily be configured or operated in a specific orientation, and should not be understood as limiting the present invention.

[0036] FIG. 1 is a cross-sectional view showing a gas collection device of the present invention. FIG. 2 is an enlarged cross-sectional view of a local area of ​​FIG. 1. FIGS. 3A and 3B are cross-sectional views showing jig unit 100. FIG. 4 is a perspective view showing battery storage unit 710. FIG. 5 is a cross-sectional view showing battery storage unit 710. FIG. 6 is a conceptual diagram showing movement of jig unit 100. FIG. 7 is a cross-sectional view showing a first driving unit. FIG. 8 is a cross-sectional view showing a second driving unit 500.

[0037] The gas collection device of the present invention is specialized for collecting gas generated inside a cylindrical battery 11, and automates most of the processes for gas collection, such as battery loading, battery puncturing, gas collection, gas transfer, and battery unloading.

[0038] The gas collection device of the present invention eliminates the process of storing gas generated from a battery in a separate collection container and immediately transfers it to a gas analysis unit, thereby preventing phenomena such as gas deterioration, leakage, and phase change and enabling real-time analysis.

[0039] The gas collecting device of the present invention is advantageous for quantitative analysis because it provides almost the same gas diffusion space for cylindrical batteries 11 of various specifications.

[0040] The cylindrical battery 11, which is the target of gas collection by the gas collection device of the present invention, has an electrode assembly housed inside a cylindrical housing made of a rigid material.

[0041] The gas collecting device of the present invention is an automated system that extracts gas from a cylindrical battery 11 and transmits the gas to a gas analysis unit. The gas analysis unit to which the gas is transmitted is, for example, a GC-MS device.

[0042] As shown in FIG. 1, the gas collection device of the present invention includes a jig unit 100 in which a cylindrical battery 11 is mounted, a boat unit 200 in which the jig unit 100 with the cylindrical battery 11 mounted thereon is placed, a chamber body unit 310 having a battery accommodating space 312 in which the boat unit 200 is accommodated and an opening 311 formed at one end thereof, a chamber cap unit 320 coupled to one end of the chamber body unit 310 so that one side thereof covers the opening 311, a first driving unit that moves the boat unit 200 into the battery accommodating space 312 through the opening 311, a second driving unit 500 that brings the one end of the chamber body unit 310 and the one side of the chamber cap unit 320 into or out of contact with each other, and a gas transmission channel 600 connected to the chamber body unit 310 and that transmits the target gas diffused in the battery accommodating space 312 to a gas analysis unit.

[0043] As shown in FIG. 2 , in the gas collection device of the present invention, when the longitudinal direction of the cylindrical battery 11 is defined as a first direction, the chamber body 310 extends in the first direction, the opening 311 is formed at one end of the chamber body 310 in the first direction, and the boat 200 is linearly moved in the first direction by the first driving unit. For example, the chamber body 310 has a cylindrical shape with the first direction as its central axis. The first direction is perpendicular to the direction of gravity or forms an acute angle with the direction of gravity. When the first direction forms an acute angle with the direction of gravity, the one end of the chamber body 310 where the opening 311 is formed is located higher in the direction of gravity than the other end. That is, since the end of the cylindrical battery 11 to be punched is formed higher than the other end, the chamber cap 320 and the punching needle 321 located at the chamber cap 320 can be prevented from being contaminated with electrolyte. Furthermore, as described above, since the first direction is formed to be inclined with respect to the direction of gravity (not perpendicular to the direction of gravity), even if electrolyte leaks from the cylindrical battery 11, the leaked electrolyte is stored in the electrolyte storage groove 112 of the jig part 100, which will be described later, and is removed from the device when the jig part 100 is unloaded.

[0044] The boat portion 200 is made of a chemically resistant insulating material.

[0045] The internal space of the chamber body 310 is also cylindrical with its central axis in the first direction. The opening 311 is circular, and the center of the opening 311 and the central axis of the internal space of the chamber body 310 coincide with each other.

[0046] The outer circumferential surface of the chamber body 310 at one end side of the chamber body 310 is tapered so that the outer diameter decreases as it approaches the one end of the chamber body 310. A ring-shaped groove 318 into which a sealing cover 317 such as an O-ring is inserted may be formed in the tapered region of the outer circumferential surface of the chamber body 310.

[0047] A punching needle 321 is provided on one side of the chamber cap portion 320 at a position facing the cylindrical battery 11, and the first driving portion moves the boat portion 200 toward the chamber cap portion 320, and forms a perforation hole in the cylindrical battery 11 with the punching needle 321.

[0048] The chamber cap portion 320 is disk-shaped. The punching needle 321 is located at the center of the chamber cap portion 320, and the center of the chamber cap portion 320 and the center of the opening 311 are located on a straight line that coincides with the central axis of the cylindrical space formed inside the chamber body portion 310.

[0049] A cylindrical sealing frame 322 into which one end of the chamber body 310 is inserted may be formed on one side of the chamber cap 320. The inner diameter of the sealing frame 322 is tapered so that it increases as it approaches the chamber body 310. The sealing frame 322 covers the tapered region of the outer circumference of the chamber body 310 when the chamber cap 320 and the chamber body 310 are coupled together.

[0050] As shown in FIG. 2, the jig part 100 has a cylindrical shape extending in a first direction, and the cylindrical battery 11 is attached to the jig part 100 so that the outer surface of the cylindrical battery 11 is in close contact with the inner surface of the jig part 100, and a needle insertion hole 111 is formed at one end of the jig part 100 in the first direction.

[0051] The needle insertion hole 111 is also located on a straight line on which the center of the chamber cap portion 320 and the center of the opening 311 are located.

[0052] The jig unit 100 includes a first jig 110 that covers one end of the cylindrical battery 11 and a second jig 120 that covers the other end of the cylindrical battery 11. In other words, the jig unit 100 consists of two jigs that are inserted into both ends of the cylindrical battery 11, respectively.

[0053] An electrolyte reservoir groove 112 is formed on the inner circumferential surface of the jig part 100, and the electrolyte reservoir groove 112 is located adjacent to the side wall where the needle insertion hole 111 is located in the internal space of the jig part 100. The electrolyte reservoir groove 112 is ring-shaped along the inner circumferential surface of the jig part 100.

[0054] 3A and 3B, the width and depth of the electrolyte reservoir groove 112 are determined taking into consideration the electrolyte poured into the cylindrical battery 11 mounted on the jig part 100. The depth of the electrolyte reservoir groove 112 is formed to be 10 to 30% of the outer diameter of the cylindrical battery 11. More preferably, the depth of the electrolyte reservoir groove 112 is formed to be 15 to 25% of the outer diameter of the cylindrical battery 11. For example, the depth of the electrolyte reservoir groove 112 is formed to be 20% of the outer diameter of the cylindrical battery 11.

[0055] In the gas collection device of the present invention, a plurality of jig units 100 are provided, and each of the plurality of jig units 100 is fitted with one cylindrical battery 11. Specifically, the gas collection device of the present invention is capable of sequentially collecting gas from a plurality of cylindrical batteries 11 using an automated system, and in this case, each cylindrical battery 11 is individually assigned to a jig unit 100.

[0056] As shown in Figures 4 to 6, for automated battery insertion, the gas collection device of the present invention further includes a battery storage unit 710 in which the plurality of jig units 100 are accommodated, and a battery transfer unit 720 that transfers the plurality of jig units 100 from the battery storage unit 710 to the boat unit 200 one by one in sequence.

[0057] 5, first cylindrical batteries 11a are mounted on some of the jig parts 100, and second cylindrical batteries 11b are mounted on other parts of the jig parts 100, with the first cylindrical batteries 11a and the second cylindrical batteries 11b having different outer diameters, and all of the jig parts 100 having the same outer diameter. That is, the gas collection device of the present invention includes various jig parts 100 having internal spaces corresponding to cylindrical batteries 11 of various specifications, and the multiple jig parts 100 having different internal space shapes and sizes have the same external shape, so that the entire gas collection process can be applied to cylindrical batteries 11 of various specifications in the same way.

[0058] As shown in Figures 4 and 5, the battery storage unit 710 includes a battery storage track 711 in which the plurality of jig parts 100 are stored in an aligned state, a battery discharge hole 712 formed at one end of the battery storage track 711 and discharging the plurality of jig parts 100 one by one, and an elastic door 713 attached to the edge of the entrance of the battery discharge hole 712 and using its restoring force to prevent the plurality of jig parts 100 from coming off the battery storage unit 710.

[0059] In the gas collecting device of the present invention, the boat unit 200 is moved between the external space of the chamber body unit 310 and the battery accommodating space 312 by the first driving unit, and the entrance of the battery discharge hole 712 is disposed at a predetermined distance from the boat unit 200 so as to face the boat unit 200 when the boat unit 200 is located in the external space of the chamber body unit 310. That is, when the boat unit 200 is removed from the chamber body unit 310, the boat unit 200 and the battery discharge hole 712 are disposed at a predetermined distance from each other in a second direction perpendicular to the first direction.

[0060] 6, the battery transmission unit 720 includes a gripper 721 that grips one of the jig units 100 exposed in the battery discharge hole 712, a rotating member 722 having the gripper 721 attached to one end thereof and extending in a second direction perpendicular to the first direction, and a shaft member 723 that is located between the boat unit 200 and the battery discharge hole 712 when the battery transmission unit 720 is located in the external space of the chamber body unit 310 and extends in the first direction, and the shaft member 723 is coupled to the rotating member 722, and the rotating member 722 rotates around the shaft member 723 as a rotation axis.

[0061] As the shaft member 723 rotates, the gripper 721 applies a force to the jig member 100 greater than the restoring force of the elastic door 713 that secures the jig member 100, thereby removing the jig member 100 from the battery storage truck 711, and as the shaft member 723 continues to rotate, the jig member 100 can be placed on the boat member 200.

[0062] 7, the first driving unit includes a power transmission bar 410 extending in the first direction, penetrating the other end of the chamber body 310 in the first direction, and having one end inserted into the chamber body 310; a moving member 420 having one side connected to the boat unit 200 and the other side connected to the one end of the power transmission bar 410; a first fixed frame 430 to which the chamber body 310 is fixed; a first moving frame 440 to which the power transmission bar 410 is fixed and which moves linearly in the first direction based on the first fixed frame 430; a shaft 450 threadedly engaged with the first moving frame 440 and rotatably connected to the first fixed frame 430; and an electric motor 460 which rotates the shaft 450.

[0063] As described above, the first driving unit is configured to convert the rotational force of the electric motor 460 into linear motion, thereby enabling precise control of the distance between the cylindrical battery 11 and the punching needle 321. Furthermore, an encoder is attached to the electric motor 460, and the measured distance between the cylindrical battery 11 and the punching needle 321 is input as an encoder signal to the control unit that controls the first driving unit.

[0064] A sealing cover 317 surrounding the power transmission bar 410 is provided inside the chamber body 310, and one end of the sealing cover 317 is fused to the other side of the moving member 420, and the other end of the sealing cover 317 is fused to the inner wall of the other end side of the chamber body 310.

[0065] The moving member 420 may be welded to the sealing cover 317 made of a chemical-resistant metal material.

[0066] The internal space of the chamber body 310 is divided into two spaces with the moving member 420 at the center, and the space facing one side of the moving member 420 is the battery receiving space 312 .

[0067] The sealing cover 317 is bellows-shaped. More specifically, the sealing cover 317 is made of a metal material and has a bellows-like shape.

[0068] 8, the second driving unit 500 includes a second moving frame 510 to which the first fixed frame 430 is fixed, a second fixed frame 520 to which the chamber cap unit 320 is fixed, and a pneumatic actuator 530 that moves the second moving frame 510 in the first direction based on the second fixed frame 520. That is, the second driving unit 500 moves the entire chamber body unit 310. The second driving unit 500 couples the chamber body unit 310 and the chamber cap unit 320 using the power of the pneumatic actuator 530, thereby maintaining continuous pressure by catching gas and enhancing airtightness.

[0069] The gas collecting device of the present invention further includes an air injection unit (not shown) positioned opposite the punching needle 321 of the chamber cap 320 and injecting high-pressure gas toward the punching needle 321. The second actuator 500 allows the chamber body 310 to completely retract so that it is not positioned on an imaginary line connecting the punching needle 321 and the nozzle of the air injection unit. When the chamber body 310 is completely separated from the chamber cap 320 by the second actuator 500, the nozzle of the air injection unit injects high-pressure gas toward the punching needle 321 to clean the punching needle 321. The high-pressure gas injected by the air injection unit is a purging gas, such as high-pressure air or an inert gas. The air injection unit injects high-pressure gas into the chamber cap 320 for several seconds to clean the chamber cap 320 contaminated with electrolyte.

[0070] The gas collecting device of the present invention further includes the pressure sensor unit connected to the gas transmission channel 600 , and the pressure sensor unit measures the pressure in the battery receiving space 312 .

[0071] The gas collecting device of the present invention further includes a control unit that controls the first driving unit, and the control unit is controlled based on the pressure measurement value output from the pressure sensor unit. Specifically, when the pressure measured by the pressure sensor unit exceeds a set pressure value, the control unit drives the first driving unit to retract the punching needle 321 from the cylindrical battery 11. The set pressure value is determined taking into account the type of cylindrical battery 11, the charge / discharge state, the number of cycles, the temperature, etc.

[0072] The gas collection device of the present invention further includes a manifold provided in the gas transmission channel 600, a dilution tank connected to the manifold by a channel, a vacuum pump connected to the manifold by a channel, a first valve that opens or closes the channel connecting the manifold and the body, a second valve that opens or closes the channel connecting the manifold and the gas analysis unit, a third valve that opens or closes the channel connecting the manifold and the dilution tank, and a fourth valve that opens or closes the channel connecting the manifold and the vacuum pump.

[0073] The control unit controls the first, second, third, and fourth valves based on a signal transmitted to the gas analysis unit, and specifically, receives information about the gas analysis process and controls each valve according to the process sequence.

[0074] While the embodiments of the present invention have been described above, they are merely illustrative, and those skilled in the art will recognize that various modifications and equivalent embodiments are possible. Therefore, the true technical scope of the present invention should be determined by the following claims. [Industrial Applicability]

[0075] The gas collection device of the present invention automates the replacement of jig parts, loading and unloading of batteries, and punching, and is capable of precise and rapid gas collection.

[0076] The gas collecting device of the present invention determines whether punching is complete by measuring the movement of the punching needle and the amount of pressure change, thereby preventing accidents such as internal breakdown of the battery and ensuring safety during gas collection. [Explanation of symbols]

[0077] 11: Cylindrical battery 11a: First cylindrical battery 11b: Second cylindrical battery 100: Jig section 110: First jig 111: Needle insertion hole 112: Electrolyte storage groove 120: Second jig 200: Rowing Club 310: Chamber body 311: Opening 312: Battery storage space 317: Ceiling cover 320: Chamber cap part 321: Punching needle 322: Ceiling frame 400: First drive unit 410: Power transmission bar 420: Moving parts 430: First fixed frame 440: First moving frame 450: Shaft 460: Electric motor 500: Second drive unit 510: Second moving frame 520: Second fixed frame 530: Pneumatic actuator 600: Gas transmission channel 710: Battery storage unit 711: Battery storage truck 712: Battery ejection hole 713: Elastic door 720: Battery transmission unit 721: Gripper 722: Rotating parts 723: Shaft material

Claims

1. a jig portion into which a cylindrical battery is attached; a boat portion on which the jig portion having the cylindrical batteries attached thereto is placed; a chamber body portion having a battery accommodating space therein for accommodating the boat portion and an opening formed at one end thereof; a chamber cap portion coupled to the one end of the chamber body portion such that one side surface covers the opening; a first driving unit that moves the boat portion into the battery accommodating space through the opening; a second driving unit that brings the one end of the chamber body portion and the one side of the chamber cap portion into close contact with or separates them from each other; a gas transmission channel connected to the chamber body portion and configured to transmit the target gas diffused in the battery accommodating space to a gas analysis unit; Including, The longitudinal direction of the cylindrical battery is defined as a first direction, the chamber body extends in the first direction; the opening is formed at the one end of the chamber body in the first direction; the boat portion is linearly moved in the first direction by the first driving portion, a punching needle is provided on the one side surface of the chamber cap portion at a position facing the cylindrical battery; The gas collecting device wherein the first driving unit moves the boat unit toward the chamber cap unit and forms perforation holes in the cylindrical battery with the punching needle.

2. the jig portion has a cylindrical shape extending in the first direction, The cylindrical battery is attached to the jig portion such that the outer circumferential surface of the cylindrical battery is in close contact with the inner circumferential surface of the jig portion; The gas collecting device according to claim 1 , wherein a needle insertion hole is formed at one end of the jig part in the first direction.

3. An electrolyte storage groove is formed on the inner circumferential surface of the jig portion, The gas collecting device of claim 2 , wherein the electrolyte reservoir groove is positioned adjacent to a sidewall of the internal space of the jig part where the needle insertion hole is located.

4. The jig portion is provided in plurality, A cylindrical battery is attached to each of the plurality of jig portions, a battery storage unit that accommodates the plurality of jig units; a battery transfer unit that transfers the plurality of jig units one by one from the battery storage unit to the boat unit; The gas collection device of claim 2 further comprising:

5. a first cylindrical battery is attached to some of the jig portions; a second cylindrical battery is attached to another part of the plurality of jig parts; the first cylindrical battery and the second cylindrical battery have different outer diameters; The gas collecting device according to claim 4 , wherein the plurality of jig portions all have the same outer diameter.

6. The battery storage unit is a battery storage truck in which the plurality of jig parts are stored in an aligned state; a battery ejection hole formed at one end of the battery storage track to eject the plurality of jig parts one by one; an elastic door attached to an edge of the entrance of the battery discharge hole and preventing the plurality of jig parts from being separated from the battery storage part by a restoring force; the boat portion is moved between the external space of the chamber body portion and the battery accommodating space by the first driving portion; 5. The gas collecting device of claim 4, wherein an entrance of the battery discharge hole is disposed at a predetermined distance from the boat portion so as to face the boat portion when the battery discharge hole is positioned in the external space of the chamber body portion.

7. The battery transmission unit is a gripper configured to grip one of the plurality of jig parts exposed in the battery ejection hole; a rotating member having the gripper attached to one end thereof and extending in a second direction perpendicular to the first direction; a shaft member extending in the first direction and positioned between the boat portion and the battery discharge hole when the boat portion is positioned in the external space of the chamber body portion, the shaft member is coupled to the rotating member, The gas collecting device according to claim 6 , wherein the rotating member rotates the shaft member around a rotation axis.

8. The first driving unit is a power transmission bar extending in the first direction, penetrating the other end of the chamber body in the first direction, and having one end inserted into the chamber body; a moving member having one side to which the boat part is coupled and another side to which the one end of the power transmission bar is coupled; a first fixing frame to which the chamber body is fixed; a first moving frame to which the power transmission bar is fixed and which moves linearly in the first direction based on the first fixed frame; a shaft that is threadedly engaged with the first moving frame and rotatably coupled to the first fixed frame; 8. The gas collection device of claim 1, further comprising: an electric motor for rotating the shaft.

9. a sealing cover surrounding the power transmission bar is provided inside the chamber body; One end of the sealing cover is fused to the other side of the moving member, The gas collecting device according to claim 8 , wherein the other end of the sealing cover is fused to an inner wall of the other end of the chamber body.

10. The gas collecting device according to claim 9 , wherein the sealing cover is shaped like a bellows.

11. The second drive unit is a second moving frame to which the first fixed frame is fixed; a second fixing frame to which the chamber cap portion is fixed; The dust collecting device according to claim 8 , further comprising: a pneumatic actuator that moves the second moving frame in the first direction relative to the second fixed frame.

12. The gas supply system further includes a pressure sensor connected to the gas transmission channel, The gas collecting device according to claim 1 , wherein the pressure sensor unit measures the pressure in the battery housing space.

13. Further comprising a control unit that controls the first driving unit, The gas collecting device according to claim 12 , wherein the control unit is controlled based on a pressure measurement value output from the pressure sensor unit.

14. a manifold provided in the gas transmission channel; a dilution tank connected to the manifold by a flow path; a vacuum pump connected to the manifold by a flow path; a first valve that opens or closes a flow path connecting the manifold and the chamber body; a second valve that opens or closes a flow path connecting the manifold and the gas analysis unit; a third valve that opens or closes a flow path connecting the manifold and the dilution tank; a fourth valve that opens or closes a flow path connecting the manifold and the vacuum pump, The gas collecting device according to claim 13 , wherein the control unit controls the first valve, the second valve, the third valve, and the fourth valve based on a signal transmitted to the gas analysis unit.

Images