Gas collection device and gas analysis device using same

Abstract

The present invention relates to a gas collection device. Disclosed are a gas collection device for collecting, in real time, gas generated in a cylindrical secondary battery, and a gas analysis device using same.

Description

Gas collection device and gas analysis device using the same

[0001] This application claims the benefit of priority from Korean Patent Application Nos. 10-2023-0158770 and 10-2023-0158776, filed on November 16, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a gas collection device, and more specifically, to a gas collection device capable of collecting gas generated inside a secondary battery in real time and a gas analysis device using the same.

[0003] Secondary batteries are batteries that can be reused repeatedly through the process of discharging, which converts chemical energy into electrical energy, and charging, which converts electrical energy into chemical energy. Commonly known types 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 have been commercialized and are widely used due to their high energy density and voltage, long cycle life, and low self-discharge rate.

[0004] Inside the lithium secondary battery, hydrogen, oxygen, nitrogen, carbon monoxide, carbon dioxide, and C are produced according to the charge and discharge reaction. n H 2n-2 (n=2~5), C n H 2n (n=2~5), C n H 2n+2 Various types of gases such as hydrocarbons and other organic gases (n=1~5) can be generated.

[0005] Furthermore, lithium secondary batteries generate large amounts of gas as the electrolyte decomposes and degrades with repeated charging and discharging. This phenomenon varies depending on the battery design and usage. Therefore, analyzing the gases generated within the battery to infer the battery degradation mechanism is essential during battery development.

[0006] Therefore, capturing and accurately analyzing the gases generated within secondary batteries is crucial. Information on the composition and content of various gases generated during charging and discharging of lithium secondary batteries is useful for developing battery materials, optimizing battery manufacturing processes, and identifying the causes of battery failures. To achieve this, the development of technologies to capture gases generated within secondary batteries is crucial.

[0007] The following process can be performed as one of the methods for analyzing gases generated inside a secondary battery.

[0008] To capture the gas to be analyzed generated within the secondary battery, a perforation is formed in the case of the secondary battery. The secondary battery with the perforation is placed in a sealed gas diffusion space. After waiting for a certain period of time, the gas to be analyzed is diffused into the gas diffusion space. The gas to be analyzed diffused in the gas diffusion space is sampled in a separate sampling container or transferred to a gas analysis device (e.g., GC-MS) to perform gas analysis.

[0009] In the above process, the method of accommodating the entire secondary battery in the 'gas diffusion space' makes it difficult to provide separate analysis conditions (temperature, shock, vibration, etc.) to the secondary battery during the analysis process, and since the gas diffusion space requires a volume sufficiently larger than the secondary battery, the gas to be analyzed may be diluted more than necessary.

[0010] To improve this, a gas collection device is applied to the surface of a secondary battery case with perforated holes to capture the target gas. However, this method also suffers from the risk of warping the secondary battery case during the perforation process, making it difficult to achieve perfect airtightness. Furthermore, it limits long-term analysis.

[0011] Therefore, a gas capture or analysis device that improves the above problems is needed.

[0012] The present invention provides a gas collection device for capturing gas generated inside a secondary battery in real time.

[0013] The present invention also provides a gas analysis device for analyzing gases generated within a secondary battery in real time while applying various conditions to the secondary battery. The technical challenges to be achieved by the present invention are not limited to those mentioned above, and other technical challenges not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the description below.

[0014] The gas capturing device of the present invention is for capturing gas from a battery,

[0015] A lower jig section having a battery penetration hole formed with both ends open;

[0016] A closed loop shaped sealing portion located above the lower jig; and

[0017] It includes an upper jig part having a battery insertion groove and a gas diffusion space, and is connected to the lower jig part with the sealing part therebetween.

[0018] According to one embodiment, a cylindrical battery is inserted into the battery penetration hole of the lower jig part in a sliding manner, and the battery may be capable of idling within the lower jig part.

[0019] According to one embodiment, the lower jig portion has a cylindrical shape extending vertically, the battery penetration hole penetrates the lower jig portion vertically, and the length of the lower jig portion vertically may be shorter than the length of the battery to be analyzed vertically.

[0020] According to one embodiment, the battery insertion groove is formed on a surface of the upper jig portion that contacts the sealing portion, and the battery insertion groove has a cylindrical shape extending in the vertical direction and includes a first section having a first inner diameter and a second section having a second inner diameter, wherein the first inner diameter and the second inner diameter are each longer than an outer diameter of the battery, and the first inner diameter may be longer than the second inner diameter.

[0021] According to one embodiment, the sealing portion may be a ring shape having a predetermined thickness, the length of the first inner diameter may be longer than the sum of the outer diameter of the battery and the thickness of the sealing portion, the length of the second inner diameter may be shorter than the sum of the outer diameter of the battery and the thickness of the sealing portion, and the sealing portion may be in close contact with a step formed at the boundary between the first section and the second section.

[0022] According to one embodiment, screw threads may be formed on the inner surface of the first section of the battery insertion groove and the outer surface of the lower jig portion, and the lower jig portion may be screw-connected to the battery insertion groove.

[0023] According to one embodiment, the gas diffusion space may be formed above the second section of the battery insertion groove.

[0024] According to one embodiment, the gas diffusion space may have a disk shape, and the diameter of the gas diffusion space may be smaller than the diameter of the target cell.

[0025] According to one embodiment, the upper jig portion may further include an auxiliary diffusion space having an arc shape centered on the center of the gas diffusion space and spaced apart from the gas diffusion space and having a predetermined width, and the gas diffusion space and the auxiliary diffusion space may be communicated with each other by a plurality of carrier gas injection holes, and may include a gas delivery path connected to the gas diffusion space and a carrier gas supply path connected to the auxiliary diffusion space.

[0026] According to one embodiment, the size of the central angle of the arc formed by the auxiliary diffusion space may be 90° to 270°.

[0027] The gas analysis device according to the present invention,

[0028] A gas collection device as described above,

[0029] A carrier gas supply unit that supplies carrier gas to the gas diffusion space of the gas collection device through a carrier gas supply path;

[0030] a mass flow control unit for controlling the flow rate of the carrier gas; and

[0031] It includes a gas analysis unit that analyzes gas delivered through a gas delivery path from the above gas diffusion space.

[0032] According to one embodiment, a battery is inserted into the battery penetration hole of the lower jig portion, and a condition imposing unit coupled to the exposed lower portion of the battery may be further included.

[0033] According to one embodiment, the conditioning unit may include a charging / discharging unit that charges or discharges the battery.

[0034] According to one embodiment, the conditioning unit may further include one or more selected from a vibration unit, a striking unit, a heater unit, a cooling unit, a pressurizing unit, and a negative pressure unit.

[0035] According to one embodiment, the gas transmission path is provided with a manifold unit,

[0036] The above gas analysis unit is connected to the manifold unit and may further include a vacuum pump unit connected to the manifold unit and a pressure measuring unit connected to the manifold unit.

[0037] The gas capture device of the present invention is for capturing gas generated inside a secondary battery in real time.

[0038] The gas collection device of the present invention forms a seal on a side surface other than the perforated surface of the secondary battery, thereby eliminating leakage problems caused by curvature of the perforated surface.

[0039] The gas collection device of the present invention can efficiently transfer the gas to be analyzed by allowing the carrier gas to flow radially around the perforated holes of the secondary battery.

[0040] The gas analysis device of the present invention can analyze in real time the gas generated inside a cylindrical secondary battery while applying various conditions to the secondary battery.

[0041] Figure 1 is a perspective view showing a gas collection device according to one embodiment.

[0042] Figure 2 is a cross-sectional view taken along line AA' of Figure 1.

[0043] Figure 3 illustrates an upper jig section according to an embodiment.

[0044] Figure 4 is a cross-sectional view taken along line BB' of Figure 1.

[0045] Figure 5 illustrates a gas analysis device according to an embodiment.

[0046] Figure 6 is a block diagram schematically showing a gas analysis device according to another embodiment.

[0047] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. Throughout this process, the sizes and shapes of components depicted in the drawings may be exaggerated for clarity and convenience. Furthermore, terms specifically defined in consideration of the structure and operation of the present invention may vary depending on the intentions or practices of the user or operator. Definitions of these terms should be based on the overall content of this specification.

[0048] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms “center,” “upper,” “lower,” “left,” “right,” “vertical,” “horizontal,” “inner,” “outer,” “one side,” “other side,” etc., is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is normally placed when used, and is only for the purpose of explaining and briefly explaining the present invention, and does not suggest or imply that the indicated device or element must have a specific orientation and be configured or operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0049] Fig. 1 is a perspective view showing a gas collection device (10) according to one embodiment. Fig. 2 is a cross-sectional view taken along line AA' of Fig. 1. Fig. 3 is a conceptual diagram showing an upper jig part (100). Fig. 4 is a cross-sectional view taken along line BB' of Fig. 1. Fig. 5 shows a gas analysis device according to one embodiment. Fig. 6 is a block diagram showing a gas analysis device according to another embodiment.

[0050] Hereinafter, with reference to FIGS. 1 to 6, the gas collection device (10) and gas analysis device (20) of the present invention will be described in detail.

[0051] The gas collection device (10) of the present invention may capture gas generated within a secondary battery. Specifically, the device may capture gas generated within the secondary battery (negative electrode, positive electrode, electrolyte, etc. of the secondary battery) in real time while applying physical conditions such as temperature changes, charging and discharging to the secondary battery, etc., by using the secondary battery as the analysis target battery (11).

[0052] In the gas capture device (10) of the present invention, the target cell (11) may be a cylindrical secondary battery. The cylindrical secondary battery may be housed in a jelly roll shape in a state in which a cathode, a positive electrode, and a separator are laminated in a cylindrical case made of a rigid material. The positive and negative electrode tabs for electrical connection of the positive and negative electrodes with the outside may both be located at one end of the secondary battery. That is, one end of the secondary battery may be an electrode side where the positive and negative electrode tabs are present, and the other end of the secondary battery may be a non-polar side without the positive and negative electrode tabs.

[0053] For gas capture, the non-polar side can be perforated using a sharp tool to form a perforation hole. However, the non-polar side surface may become distorted as the perforation hole is formed, forming an irregularly curved surface. Therefore, if a seal is formed directly on the non-polar side, there is a risk of leakage due to the irregularly curved surface.

[0054] The gas collection device (10) of the present invention collects gas by covering the non-polar side, but the seal is formed on the battery side, thereby stably forming the seal and maintaining it for a long time. In addition, since the gas collection device (10) of the present invention is capable of collecting gas while leaving a portion of the analysis target battery (11), including the electrode side, open to the outside, various conditions such as heating, cooling, shock, vibration, and the like, as well as charging and discharging, can be applied to the analysis target battery (11) during gas collection.

[0055] In FIGS. 1 to 5, the z-axis direction may be the vertical direction. In the cylindrical coordinate system shown in FIG. 1, the r direction may be the first direction. In FIGS. 1 to 5, the x-axis direction may be a direction perpendicular to the vertical direction. In FIGS. 1 to 5, the y-axis direction may be a direction perpendicular to the vertical direction and the x-axis direction.

[0056] The target cell (11) for analysis can be combined with the gas collection device (10) in a state where the electrode side faces downward, the non-polar side faces upward, and the length direction is parallel to the vertical direction.

[0057] As shown in FIG. 1 and FIG. 2, the gas collection device (10) of the present invention,

[0058] A lower jig part (200) surrounding the side of the above analysis target battery (11);

[0059] A closed loop shaped sealing portion (300) located above the lower jig and into which the battery (11) is fitted;

[0060] An upper jig part (100) covering the upper part of the battery (11) and coupled to the lower jig part (200) with the sealing part (300) interposed therebetween;

[0061] A carrier gas supply path (410) for supplying carrier gas to a gas diffusion space (120) provided inside the upper jig section (100); and

[0062] It includes a gas delivery path (510) that delivers gas from the above gas diffusion space (120) to a gas collection container or gas analysis device.

[0063] The above gas diffusion space (120) may be formed as a gas diffusion groove on the surface of the upper jig portion (100) facing the battery (11).

[0064] A battery penetration hole (210) is formed in the lower jig part (200), and the battery (11) to be analyzed is inserted into the battery penetration hole (210). The outer circumference of the battery (11) slides on the inner circumference of the battery penetration hole (210), so that the battery (11) can rotate idly with respect to the lower jig part (200).

[0065] The lower jig part (200) is provided in a cylindrical shape extending vertically, and the battery penetration hole (210) may be formed to penetrate the lower jig part (200) vertically so that both ends of the lower jig part (200) are open. The vertical length of the lower jig part (200) may be shorter than the vertical length of the battery (11). More specifically, the vertical length of the lower jig part (200) may be shorter than the vertical length of the battery (11) minus the depth of the battery insertion groove (110). Therefore, the electrode side of the target cell (11) for analysis is completely exposed to the outside, and various conditions can be applied to the target cell (11) for analysis while capturing gas.

[0066] A step is formed along the circumferential direction on the outer surface of the lower jig part (200), and the outer diameter of the upper part of the lower jig part (200) can be formed smaller than the outer diameter of the lower part. The inner diameter of the lower jig part (200) can be formed to be almost similar to the outer diameter of the battery (11) to be analyzed, but can have a length that causes almost no friction during idling.

[0067] A screw thread may be formed on the upper portion of the outer surface of the lower jig portion (200), and wrinkles extending in the vertical direction may be formed on the lower portion. The user may rotate the lower jig portion (200) while gripping it to screw-connect the lower jig portion (200) to the upper jig portion (100).

[0068] As illustrated in Fig. 3, a battery insertion groove (110) into which a portion of a battery (11) is inserted may be formed on the bottom surface of the upper jig portion (100). The battery insertion groove (110) has a cylindrical shape extending vertically, and is formed with a first inner diameter (111d) from the bottom entrance to a first section (111), and a second inner diameter (112d) from the first section (111) to a second section (112). The first inner diameter (111d) and the second inner diameter (112d) may be longer than the outer diameter of the battery (11), and the first inner diameter (111d) may be longer than the second inner diameter (112d).

[0069] The sealing portion (300) may be ring-shaped, and for example, the sealing portion (300) may be an O-ring. The sealing portion (300) has a predetermined thickness in a first direction (direction r in a cylindrical coordinate system). When this is referred to as the sealing thickness (300t), the length of the first inner diameter (111d) may be longer than the sum of the outer diameter of the battery (11) to be analyzed and the sealing thickness (300t), and the length of the second inner diameter (112d) may be shorter than the sum of the outer diameter of the battery (11) and the sealing thickness (300t).

[0070] The material of the sealing portion (300) may be a chemically resistant elastic material, and may include at least one of silicone rubber, nitrile rubber, butadiene rubber, fluoroelastomer, and ethylene propylene diene monomer rubber. The diameter (inner diameter or outer diameter) of the sealing portion (300) may be smaller than the outer diameter of the battery (11) when it is not mounted on the battery (11), but when it is mounted on the battery (11) to be analyzed, the elastic material may be stretched and completely adhere to the side of the battery (11). It is preferable that the material of the sealing portion (300) be a material having a high coefficient of friction with the material of the case of the battery (11) to be analyzed, because this can prevent the battery (11) from being separated from the gas collection device (10) during gas collection. The sealing thickness (300t) may be the length in the first direction when the sealing portion (300) is mounted on the battery (11) and is stretched. The above sealing portion (300) can be closely attached to a ring-shaped step formed at the boundary between the first section (111) and the second section (112).

[0071] Screw threads may be formed on the inner surface of the first section (111) of the battery insertion groove (110) and the outer surface of the lower jig part (200), and the upper end of the lower jig part (200) may be inserted into the battery insertion groove (110) and screw-connected. As described above, by rotating the lower jig part (200) while the upper jig part (100) is fixed, the upper jig part (100) and the lower jig part (200) can be screw-connected to each other.

[0072] As shown in Fig. 3, a gas diffusion space (120) can be formed in the upper region of the battery insertion groove (110), i.e., the upper region of the second section.

[0073] The shape of the above gas diffusion space (120) is formed in a disk shape, and the diameter (120d) of the above gas diffusion space (120) can be formed to be smaller than the diameter of the battery (11).

[0074] As illustrated in Fig. 4, an auxiliary diffusion space (130) in the shape of an arc, centered on the center of the gas diffusion space (120) and having an inner diameter (130d) larger than the diameter (120d) of the gas diffusion space (120), may be provided inside the upper jig portion (100). In addition, the gas diffusion space (120) and the auxiliary diffusion space (130) may be communicated with each other by a plurality of carrier gas injection holes (131).

[0075] The gas delivery path (510) may be connected to the gas diffusion space (120), and the carrier gas supply path (410) may be connected to the auxiliary diffusion space (130).

[0076] The size of the central angle of the arc formed by the auxiliary diffusion space (130) may be 90° to 270°. The carrier gas injection holes (131) may be formed in multiple numbers and may be arranged at equal intervals (angles) from each other. By doing so, the carrier gas may be injected in a directional manner to achieve efficient gas transfer. At this time, if the size of the central angle is too large, it may hinder discharge into the gas transfer path (510), and if the size of the central angle is too small, it may hinder uniform gas diffusion in the gas diffusion space (120).

[0077] A gas analysis device (20) using a gas collection device (10) as described above,

[0078] A carrier gas supply unit (400) that supplies carrier gas to the gas diffusion space (120) of the gas collection device (10) through a carrier gas supply path (410);

[0079] A mass flow control unit (600) for controlling the flow rate of the carrier gas; and

[0080] It includes a gas analysis unit (500) that analyzes gas delivered through a gas delivery path (510) from the above gas diffusion space (120).

[0081] Figure 5 illustrates an example of a gas analysis device (20) using a gas collection device (10) according to the present invention.

[0082] The gas analysis device (20) of FIG. 5 may include a gas collection device (10) coupled to an upper portion of the analysis target cell (11); a conditioning unit (900) coupled to a lower portion of the analysis target cell (11); a carrier gas supply unit (400) for supplying a carrier gas to a gas diffusion space formed inside the gas collection device (10); a carrier gas supply path (410) for delivering the carrier gas supplied by the carrier gas supply unit (400) to the gas diffusion space; a mass flow control unit (600) provided in the carrier gas supply path (410) for controlling the supply amount of the carrier gas supplied to the gas diffusion space; a gas analysis unit (500) for receiving and analyzing the analysis target gas from the gas diffusion space; and a gas delivery path (510) for delivering the analysis target gas in the gas diffusion space to the gas analysis unit (500).

[0083] The above condition imposing unit (900) may be equipped with a charging / discharging unit that charges or discharges the analysis target battery (11).

[0084] The gas analysis device (20) is equipped with a charging / discharging unit capable of charging or discharging a battery, and can change the SOC (state of charge) of the battery (11) to be analyzed and transmit gas generated under various charging (discharging) conditions to the gas analysis unit (500) in real time.

[0085] The above-mentioned condition-giving unit (900) may further include one or more of a vibration unit, a striking unit, a heater unit, a cooling unit, a pressurizing unit, and a negative pressure unit, together with the charging / discharging unit.

[0086] The vibrating unit may vibrate the target cell (11) at regular intervals. For example, the vibrating unit may be a device capable of transmitting sound waves or ultrasonic waves to the cell (11).

[0087] The impact unit may be capable of applying a physical impact to the target cell (11). For example, the impact unit may be capable of colliding a rigid body with the cell (11) in an instant.

[0088] The heater unit may supply a heat source to the analysis target cell (11). For example, the heater unit may be a coil heater, an infrared heater, an induction heating heater, a dielectric heating heater, etc.

[0089] The cooling unit may be one that removes thermal energy from the target cell (11). For example, the cooling unit may be a chiller, liquid nitrogen, etc.

[0090] The pressurizing unit may apply pressure to the surface of the analysis register battery.

[0091] The negative pressure section may be a vacuum chamber.

[0092] In addition, the gas analysis device (20) is equipped with a mass flow control unit (600), thereby diluting the concentration of the analysis target gas injected into the gas analysis unit (500) to an appropriate level.

[0093] The above gas analysis unit (500) may include one or more of a GC-MS (gas chromatography-mass spectroscopy), a GC-PDD (gas chromatography-pulsed discharge detector), a GC-TCD (gas chromatography-thermal conductivity detector), a GC-FID (gas chromatography-flame ionization detector), a FT-IR (Fourier transform infrared spectroscopy), and a Raman spectroscopy.

[0094] The gas delivery path (510) and the carrier gas supply path (410) may include pipes, hoses, tubes, etc. for delivering gas.

[0095] The carrier gas supply unit (400) may be a gas cylinder storing an inert gas.

[0096] The mass flow control unit (600) may be a mass flow controller (MFC). The mass flow control unit (460) can control the injection amount of carrier gas to create a gas concentration optimized for analysis by the gas analysis unit (500) and deliver the gas to be analyzed to the gas analysis unit (500).

[0097] Fig. 6 illustrates a configuration of a gas analysis device according to another embodiment. The gas analysis device illustrated in Fig. 6 comprises: a gas collection device (10) according to the present invention;

[0098] A carrier gas supply unit (400) connected to the above carrier gas supply path (410);

[0099] A mass flow control unit (600) that controls the supply amount of the carrier gas injected into the gas diffusion space through the carrier gas supply path (410);

[0100] A manifold unit (700) connected to the above gas transmission path (510);

[0101] A vacuum pump unit (800) connected to the above manifold unit (700);

[0102] A pressure measuring unit (710) connected to the above manifold unit (700);

[0103] It may include a gas analysis unit (500) connected to the above manifold unit (700).

[0104] The gas analysis device (500) may be a GC-MS (gas chromatography-mass spectroscopy) device, a GC-PDD (gas chromatography-pulsed discharge detector) device, a GC-TCD (gas chromatography-thermal conductivity detector) device, a GC-FID (gas chromatography-flame ionization detector) device, and an FT-IR (Fourier transform infrared spectroscopy) device.

[0105] The gas delivery path (510) and the carrier gas supply path (410) may include pipes, hoses, tubes, etc. for delivering gas.

[0106] The carrier gas supply unit (400) may be a gas cylinder storing an inert gas.

[0107] The manifold unit (700) may be a multi-pipe having a passage formed inside that serves as a pipe and a plurality of device connection ports on the outside.

[0108] The mass flow control unit (600) may be a mass flow controller (MFC).

[0109] The vacuum pump unit (800) may be selected from, for example, an oil rotary pump, a Roots pump, an oil diffusion pump, a turbo molecular pump, a cryopump, an ion pump, etc.

[0110] The pressure measuring unit (710) may be a pressure gauge.

[0111] While the embodiments of the present invention have been described above, they are merely exemplary, and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible. Therefore, the true technical protection scope of the present invention should be defined by the following claims.

[0112] [Explanation of symbols]

[0113] 10...Gas collection device

[0114] 11...Battery subject to analysis

[0115] 100...upper jig

[0116] 110...Battery insertion hole

[0117] 111... Section 1

[0118] 111d...1st inner diameter

[0119] 112...Second section

[0120] 112d..2nd inner diameter

[0121] 120...gas diffusion space

[0122] 120d...diameter of the gas diffusion space

[0123] 130... auxiliary diffusion space

[0124] 130d...inner diameter of auxiliary diffusion space

[0125] 131...Carrier gas injection hole

[0126] 200...lower jig

[0127] 210...Battery penetration hole

[0128] 300...shillings

[0129] 300t... sealing thickness

[0130] 400...Carrier gas supply unit

[0131] 410...Carrier gas supply euro

[0132] 500...gas analysis unit

[0133] 510...gas transmission euro

[0134] 600...Mass Flow Control Unit

[0135] 700...manifold unit

[0136] 710...Pressure measuring unit

[0137] 800... vacuum pump unit

[0138] 900… Conditional Unit

Claims

1. In a gas capturing device that captures gas from a battery, A lower jig section having a battery penetration hole formed with both ends open; A closed loop shaped sealing portion positioned above the lower jig; and A gas collection device comprising an upper jig part having a battery insertion groove and a gas diffusion space, and connected to the lower jig part with the sealing part therebetween.

2. In paragraph 1, A cylindrical battery is inserted into the battery penetration hole of the lower jig section in a sliding manner. A gas capturing device wherein the above battery is capable of idling within the lower jig section.

3. In paragraph 2, The above lower jig portion has a cylindrical shape extending in the vertical direction, The above battery penetration hole penetrates the lower jig section in the vertical direction, A gas capturing device wherein the vertical length of the lower jig portion is shorter than the vertical length of the battery to be analyzed.

4. In paragraph 3, The above battery insertion groove is formed on the surface that contacts the sealing portion of the upper jig portion, The above battery insertion groove is, It has a cylindrical shape that extends vertically. It comprises a first section having a first inner diameter and a second section having a second inner diameter, wherein the first section is connected to the second section The first inner diameter and the second inner diameter are longer than the outer diameter of the battery, A gas capturing device wherein the first inner diameter is longer than the second inner diameter.

5. In paragraph 4, The above sealing portion is a ring shape having a predetermined thickness, The length of the first inner diameter is longer than the sum of the outer diameter of the battery and the thickness of the sealing portion, The length of the second inner diameter is shorter than the sum of the outer diameter of the battery and the thickness of the sealing portion. A gas collection device in which the sealing portion is in close contact with a step formed at the boundary between the first section and the second section.

6. In paragraph 4, Screw threads are formed on the inner surface of the first section and the outer surface of the lower jig portion. A gas collection device in which the lower jig portion is screw-connected to the battery insertion groove.

7. In paragraph 4, A gas collection device wherein the gas diffusion space is formed in an upper region of the second section of the battery insertion groove.

8. In paragraph 7, The above gas diffusion space is disk-shaped, A gas capture device wherein the diameter of the gas diffusion space is smaller than the diameter of the battery.

9. In paragraph 8, The upper jig part further comprises an auxiliary diffusion space in the shape of an arc, centered on the center of the gas diffusion space and spaced apart from the gas diffusion space and having a predetermined width. The above gas diffusion space and the above auxiliary diffusion space are communicated by a plurality of carrier gas injection holes, A gas transmission path connected to the above gas diffusion space and A gas capturing device comprising a carrier gas supply path connected to the auxiliary diffusion space.

10. In paragraph 9, A gas capturing device, wherein the size of the central angle of the arc formed by the auxiliary diffusion space is 90° to 270°.

11. Gas collection device of paragraph 1; A carrier gas supply unit for supplying carrier gas to the gas diffusion space of the gas capturing device through a carrier gas supply path; A mass flow control unit for controlling the flow rate of the above-mentioned carrier gas; and A gas analysis device including a gas analysis unit that analyzes gas delivered through a gas delivery path from the above gas diffusion space.

12. In paragraph 11, A gas analysis device further comprising a condition imposing unit coupled to the exposed lower part of the battery, wherein a battery is inserted into the battery penetration hole of the lower jig part.

13. In paragraph 12, A gas analysis device wherein the above-mentioned condition imposing unit has a charging / discharging unit for charging or discharging a battery.

14. A gas analysis device in accordance with claim 13, wherein the conditioning unit further includes at least one selected from a vibration unit, a striking unit, a heater unit, a cooling unit, a pressurizing unit, and a negative pressure unit.

15. In paragraph 11, The above gas transmission path is equipped with a manifold unit, A gas analysis device, wherein the gas analysis unit is connected to the manifold unit, and further includes a vacuum pump unit connected to the manifold unit, and a pressure measuring unit connected to the manifold unit.

Images