Battery cell pressurizing device

Abstract

According to the embodiment of the invention, the battery cell pressurizing device comprises a first flat plate and a third flat plate, wherein the first flat plate and the third flat plate are arranged at a preset distance in a spaced manner; a second plate provided so as to be movable between the first plate and the third plate; the pressure display part is configured to change color according to the pressure change of an all-solid-state battery cell arranged between the second flat plate and the third flat plate, and the all-solid-state battery cell is arranged between the pressure display part and the third flat plate; and the color change of the pressure display part can be recognized by naked eyes at the upper part of the first flat plate.

Description

Technical Field

[0001] The present disclosure relates to a cell pressurizing device. Background Art

[0002] In recent years, with the rapid development of industries such as electronics and communication, high-output batteries have been widely used.

[0003] Currently, most commercial lithium secondary batteries use an organic liquid electrolyte in which a lithium salt is dissolved in a flammable organic solvent, so there are potential risks of leakage, fire, and explosion.

[0004] Therefore, all-solid-state batteries using solid electrolytes instead of liquid electrolytes are being developed. Since all-solid-state batteries do not contain flammable organic solvents, they have the advantage of simplifying safety devices, and research and development are being carried out in various directions.

[0005] With the development of all-solid-state batteries, a test device for measuring the pressurized state of all-solid-state batteries is also required. However, since most conventional cell test devices are for lithium secondary batteries using electrolytes, a measuring device optimized for all-solid-state cells is needed. Summary of the Utility Model

[0006] (I) Technical Problems to be Solved

[0007] The purpose of the present disclosure is to provide a cell pressurizing device suitable for measuring all-solid-state cells.

[0008] (II) Technical Solutions

[0009] The cell pressurizing device according to an embodiment of the present disclosure may include: a first flat plate and a third flat plate, the first flat plate and the third flat plate being spaced apart from each other at a predetermined distance; a second flat plate disposed to be movable between the first flat plate and the third flat plate; and a pressure display unit configured to change color according to a pressure change of a cell disposed between the second flat plate and the third flat plate, the cell may be disposed between the pressure display unit and the third flat plate, and a color change of the pressure display unit can be visually recognized above the first flat plate.

[0010] In an embodiment of the present disclosure, at least a part of the first flat plate and the second flat plate may be made of a transparent material.

[0011] In an embodiment of the present disclosure, it may further include: a plurality of fastening members, one end of the fastening member being fastened to the third flat plate, and the other end of the fastening member protruding above the first flat plate; and a stopper, combined with a portion of the fastening member protruding above the first flat plate, and the second flat plate may be arranged to be movable along the length direction of the plurality of fastening members.

[0012] In an embodiment of the present disclosure, it may further include: an elastic member, disposed between the first flat plate and the second flat plate, pressing the second flat plate toward the battery cell side by an elastic restoring force.

[0013] In an embodiment of the present disclosure, an insertion groove may be formed on the lower surface of the second flat plate, and the pressure display portion may be inserted into the insertion groove.

[0014] In an embodiment of the present disclosure, it may further include: a pressure dispersion member, disposed between the pressure display portion and the battery cell to disperse the pressure applied to the pressure display portion.

[0015] In an embodiment of the present disclosure, the pressure dispersion member may be formed in a flat pad shape and may include any one of rubber, polyurethane, and silica gel.

[0016] In an embodiment of the present disclosure, it may further include: a hydrogen sulfide detection portion, disposed between the battery cell and the third flat plate for detecting hydrogen sulfide.

[0017] In an embodiment of the present disclosure, the hydrogen sulfide detection portion may include: a main body portion, formed in a flat sheet shape; and a color-changing portion, combined with the main body portion and containing an organometallic compound that changes color upon reaction with hydrogen sulfide.

[0018] In an embodiment of the present disclosure, the main body portion may be made of a porous material and may include polydimethylsiloxane.

[0019] In addition, a battery cell pressurizing device according to an embodiment of the present disclosure may include: a hydrogen sulfide detection portion, stacked below the battery cell for detecting hydrogen sulfide leaked from the battery cell; and a pressure display portion, stacked above the battery cell and changing color according to the pressure applied by the battery cell, and the hydrogen sulfide detection portion may include an organometallic compound that changes color upon reaction with hydrogen sulfide.

[0020] In an embodiment of the present disclosure, the hydrogen sulfide detection portion may include a porous transparent polydimethylsiloxane pad impregnated with the organometallic compound.

[0021] In an embodiment of the present disclosure, it may further include: a flat plate, stacked on the upper part of the pressure display portion and moving in the up and down direction according to the volume change of the battery cell, and at least a part of the flat plate may be made of a transparent material.

[0022] A battery cell pressurizing device according to an embodiment of the present disclosure may include: a first flat plate and a third flat plate, the first flat plate and the third flat plate being spaced apart from each other in a first direction; a second flat plate, arranged to be movable in the first direction between the first flat plate and the third flat plate; and a pressure display portion, visually displaying the magnitude of the pressure applied to the battery cell disposed between the second flat plate and the third flat plate, and the pressure display portion may change the displayed color according to the pressure applied to the battery cell.

[0023] In an embodiment of the present disclosure, the pressure display portion may be disposed between the second flat plate and the battery cell, and the pressure display portion may be visually recognized through the first flat plate.

[0024] (III) Beneficial effects

[0025] According to an embodiment of the present disclosure, the pressure display portion visually displays the pressure change through color change, and various analyses of the pressure change of the object to be measured can be performed. In addition, the leakage of hydrogen sulfide can be visually detected through the hydrogen sulfide detection portion, so abnormalities of the all-solid-state battery cell can be detected early during the test. Description of the drawings

[0026] Figure 1 is a perspective view of a battery cell pressurizing device according to an embodiment of the present disclosure.

[0027] Figure 2 is Figure 1 an exploded perspective view of the pressurizing device shown.

[0028] Figure 3 is Figure 1 a side view of the pressurizing device shown.

[0029] Figure 4 is a sectional view showing Figure 3 the operation of the pressurizing device shown.

[0030] Figure 5 is Figure 2 a perspective view of the hydrogen sulfide detection portion shown.

[0031] Description of reference numerals:

[0032] 100: Pressurizing device 1: First flat plate

[0033] 2: Second flat plate 3: Third flat plate

[0034] 4: Base 5: Fastening Component

[0035] 6: Stopper 7: Pressure Display Unit

[0036] 8: Pressure Dispersion Component 9: Hydrogen Sulfide Detection Unit

[0037] 10: Object to be Measured 11: External Electrode

[0038] 12: Power Supply Unit 13: Elastic Component Detailed Implementation Manner

[0039] Before detailing the present disclosure, it should be noted that the terms or words used in the following description of this specification and claims should not be construed restrictively as general meanings or meanings in a dictionary, but should be construed in accordance with the technical idea of the present disclosure, in line with the principle that the inventor can appropriately define the concept of the terms so as to describe their own invention in the best way. Therefore, it should be understood that the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present disclosure, and do not represent all the technical ideas of the present disclosure. At the time of filing this application, there may be various equivalents and variant examples that can replace these embodiments.

[0040] Next, the preferred embodiments of the present disclosure will be described in detail with reference to the drawings. At this time, it should be noted that in the drawings, the same components are denoted by the same reference numerals as much as possible. In addition, detailed descriptions of known functions and configurations that may obscure the gist of the present disclosure will be omitted. For the same reason, in the drawings, some components are exaggerated, omitted, or shown schematically, and the dimensions of each component do not fully reflect the actual dimensions.

[0041] Figure 1 is a perspective view of a battery cell pressurizing device according to an embodiment of the present disclosure, Figure 2 is Figure 1 an exploded perspective view of the pressurizing device shown. In addition, Figure 3 is Figure 1 a side view of the pressurizing device shown, Figure 4 is a cross-sectional view showing Figure 3 the operation of the pressurizing device shown.

[0042] Referring to Figures 1 to 4 , the pressurizing device 100 according to an embodiment of the present disclosure is a device for measuring pressure changes occurring in a flat object to be measured 10 such as a battery cell, and may include a first plate 1 and a third plate 3 as fixed plates, a second plate 2 as a movable plate, a pressure display unit 7, and a hydrogen sulfide detection unit 9.

[0043] The object to be measured 10 in this embodiment may include an all-solid-state battery cell.

[0044] On the other hand, in this specification, a all-solid-state battery cell may refer to a battery that uses an electrolyte instead of a liquid electrolyte containing flammable organic solvents.

[0045] For example, a all-solid-state battery cell may be a battery that uses a solid electrolyte, a gel-polymer electrolyte, a composite electrolyte, or the like.

[0046] More specifically, as will be described later, since the hydrogen sulfide detection unit 9 detects hydrogen sulfide (H2S) leaking from the object under test 10, in this specification, a all-solid-state battery cell may be a battery that uses a sulfide-based solid electrolyte.

[0047] Compared with a lithium-ion battery using an electrolyte, a all-solid-state battery can greatly reduce the possibility of fire or explosion even in the event of a short circuit, and can improve safety. In addition, the all-solid-state battery cell of this embodiment may include a pouch-type battery cell in which a housing of the battery cell is formed of an aluminum film or the like.

[0048] The first to third flat plates 1, 2, and 3 may be formed of plates having rigidity that does not bend during the pressure measurement process, respectively.

[0049] The first to third flat plates 1, 2, and 3 may be stacked parallel to each other and may be spaced apart from each other so as not to contact each other. In addition, a battery cell serving as the object under test 10 and a pressure display unit 7 may be provided between the second flat plate 2 and the third flat plate 3. That is, the third flat plate 3 is provided below the object under test 10, the second flat plate 2 is provided above the object under test 10, and the first flat plate 1 may be provided above the second flat plate 2.

[0050] The first flat plate 1 and the second flat plate 2 are formed with an area larger than that of the object under test 10 and may include a plurality of through holes 1a, 2a into which fastening members 5 such as bolts are inserted.

[0051] The plurality of through holes 1a, 2a may be spaced apart in a peripheral region of the object under test 10, and each through hole 1a, 2a may be set to have the same separation distance (for example, a horizontal distance) as the object under test 10.

[0052] The third flat plate 3 can be disposed below the second flat plate 2 and can be formed with the same or similar area as the first flat plate 1 or the second flat plate 2. The third flat plate 3 may include a plurality of fastening grooves 3a to which the fastening member 5 is coupled. The plurality of fastening grooves 3a are provided at positions corresponding to the plurality of through holes 1a, 2a, and threads may be formed inside the fastening grooves 3a to be coupled to the fastening member 5.

[0053] In this embodiment, the third flat plate 3 is coupled to the base 4, thereby suppressing its movement. However, it is not limited thereto, and various modifications can be made as long as the third flat plate 3 can be stably fixed.

[0054] The fastening member 5 fastens the first flat plate 1 and the third flat plate 3 to each other. For example, the fastening member 5 may be formed in a rod shape having no head and threads formed on the outer circumferential surface such as a stud bolt, and one end of the fastening member 5 may sequentially pass through the first flat plate 1 and the second flat plate 2 and then be threadedly coupled to the coupling groove 3a of the third flat plate 3.

[0055] The other end of the fastening member 5 may protrude above the first flat plate 1 and be coupled to the stopper 6. The stopper 6 may be threadedly coupled to the other end of the fastening member 5 to prevent the first flat plate 1 from detaching from the fastening member 5. In this embodiment, the stopper 6 may use a nut or a knob nut, but it is not limited thereto.

[0056] The second flat plate 2 may include a plurality of through holes 2a through which the fastening member 5 passes. The diameter of the through holes 2a may be larger than the diameter of the fastening member 5, so that the second flat plate 2 can be arranged to be movable in the up and down direction between the first flat plate 1 and the third flat plate 3 along the length direction of the fastening member 5.

[0057] An elastic member 13 may be disposed between the first flat plate 1 and the second flat plate 2. The elastic member 13 can press the second flat plate 2 toward the object to be measured 10 side by using the elastic restoring force.

[0058] In this embodiment, the elastic member 13 may include a compression spring. For example, the fastening member 5 may pass through the center of the compression spring and be coupled to the compression spring, so that the elastic member 13 can be compressed along the length direction of the fastening member 5 and provide an elastic restoring force to the second flat plate 2.

[0059] In the case of the above configuration, when the distance between the first flat plate 1 and the second flat plate 2 is reduced, the elastic member 13 is compressed, and the elastic restoring force of the elastic member 13 increases. Therefore, the pressure applied by the second flat plate 2 to the object to be measured 10 also increases. Therefore, the pressure applied to the object to be measured 10 can be adjusted by adjusting the distance between the first flat plate 1 and the second flat plate 2.

[0060] The pressure display unit 7 can be disposed on the upper portion of the object 10 to be measured. Specifically, it can be disposed between the second flat plate 2 and the object 10 to be measured. The pressure display unit 7 can measure the pressure applied to the pressure display unit 7 due to the volume expansion of the object 10 to be measured.

[0061] The pressure display unit 7 according to the present embodiment may include a sheet-shaped pressure sensor that can change color according to the applied pressure. For example, the pressure display unit 7 may include a piezoelectric material that changes color according to the applied pressure, and thus the magnitude of the pressure applied to the object 10 to be measured can be visually displayed.

[0062] The color change of the pressure display unit 7 can be formed by doping a dopant having different color light output characteristics in the piezoelectric material, but is not limited thereto.

[0063] The pressure display unit 7 can be formed in an area facing the entire surface of the object 10 to be measured. In addition, at least a part of the pressure display unit 7 of the present embodiment can be inserted into the second flat plate 2. For this purpose, an insertion groove 2b can be formed on the lower surface of the second flat plate 2, and the pressure display unit 7 is inserted into the insertion groove 2b.

[0064] The depth of the insertion groove 2b can be the same as the thickness of the pressure display unit 7. Therefore, the lower surface of the pressure display unit 7 can be in the same plane as the lower surface of the second flat plate 2.

[0065] On the other hand, as described above, since the pressure display unit 7 of the present embodiment displays the magnitude of the pressure by color change, the pressure display unit 7 of the present embodiment needs to be visually confirmed with the naked eye from the outside of the pressurizing device 100.

[0066] For this purpose, at least a part of the first flat plate 1 and the second flat plate 2 of the present embodiment can be made of a transparent material.

[0067] The first flat plate 1 of the present embodiment can form an identification area S in the area corresponding to the object 10 to be measured. An operator can visually confirm the second flat plate 2 through the identification area S. For this purpose, the identification area S may include a through hole 1b, or may be formed in a form in which a transparent member 1c is coupled to the through hole 1b.

[0068] Here, the transparent member 1c can use glass or transparent acrylic, but is not limited thereto.

[0069] The second flat plate 2 of the present embodiment can be entirely made of a transparent material. For example, the second flat plate 2 can be entirely made of a glass or transparent acrylic material. Therefore, even from the upper portion of the second flat plate 2, it is possible to easily identify the pressure display unit 7 provided at the lower portion of the second flat plate 2.

[0070] With such a configuration, an operator can easily identify the color change of the pressure display unit 7 provided at the lower part of the second plate 2 from the upper part of the first plate 1.

[0071] On the other hand, in the present embodiment, only a partial area of the first plate 1 is formed as the identification area S, but the configuration of the present disclosure is not limited thereto. Similar to the second plate 2, the entire first plate 1 can be formed as the identification area by making the entire first plate 1 of a transparent member. Similarly, similar to the first plate 1, a transparent member can be provided only in a partial area of the second plate 2 without making the entire second plate 2 of a transparent material.

[0072] The pressurizing device 100 of the present embodiment can provide a pressure dispersion member 8 between the object to be measured 10 and the pressure display unit 7. The pressure dispersion member 8 can be used to relieve the pressure concentration at a specific position of the pressure display unit 7. The pressure dispersion member 8 can be formed in a flat shape such as a pad or a sheet, and can be arranged to contact the entire one surface of the object to be measured 10.

[0073] The pressure dispersion member 8 can include a material such as rubber, polyurethane, or silica gel that is compressed and elastically deformed under an external force, but the configuration of the present disclosure is not limited thereto. For example, the pressure dispersion member 8 can include transparent polydimethylsiloxane.

[0074] The hydrogen sulfide detection unit 9 can be provided at the lower part of the object to be measured 10, and can detect the hydrogen sulfide leakage of the object to be measured 10.

[0075] An inorganic solid electrolyte is used as the all-solid-state battery cell of the object to be measured 10 in place of an organic solvent electrolyte. Among inorganic solid electrolytes, sulfide-based solid electrolytes have higher ionic conductivity compared to oxide-based solid electrolytes and the like, and have many advantages in obtaining higher-performance all-solid-state batteries. However, since the object to be measured 10 using a sulfide-based solid electrolyte contains sulfur, moisture invading the inside of the battery cell may react with sulfur to generate toxic hydrogen sulfide (H2S). That is, if the outer packaging material of the all-solid-state battery cell is damaged, hydrogen sulfide may leak to the outside.

[0076] Therefore, the pressurizing device 100 of the present embodiment can include the hydrogen sulfide detection unit 9 so as to quickly detect hydrogen sulfide leakage during the test of the object to be measured 10.

[0077] Figure 5 Yes Figure 2 The perspective view of the hydrogen sulfide detection unit shown. Referring together Figure 5 In the present embodiment, the hydrogen sulfide detection unit 9 can be provided between the object to be measured 10 and the third plate 3, and can include a main body portion 9a formed in a flat sheet shape and a color-changing portion 9b coupled to the main body portion 9a.

[0078] The color-changing part 9b may contain a substance that rapidly changes color upon reaction with hydrogen sulfide. For this purpose, the color-changing part 9b of this embodiment may contain an organometallic compound. For example, the color-changing part 9b may contain at least one element selected from Cu, Pb, Ag, Mn, Ni, Co, Sn, and Cd. From the perspective of easy color change, the element may be combined with the main body part 9a in an ionized state or a state that is easily ionized. More specifically, the color-changing part 9b may contain at least one selected from CuSO4, Pb(CH3COO)2, and Ag2SO4.

[0079] The color-changing part 9b may be dispersed throughout the main body part 9a and may be formed in a liquid state, a solid state, or a gel state.

[0080] The surface of the main body part 9a may include a plurality of grooves, and the color-changing part 9b may be filled into the grooves. For example, the main body part 9a may be made of a porous material having a plurality of holes formed therein, and the color-changing part 9b may be filled into the holes and the external grooves.

[0081] For example, the main body part 9a may be made of a silica gel material, and specifically, may contain polydimethylsiloxane. In this case, the main body part 9a can be compressed and elastically deformed under an external force. Therefore, like the above-mentioned pressure dispersion member 8, it can also provide a function of dispersing the pressure applied to the object under test 10.

[0082] In addition, the main body part 9a may be made of a transparent material to facilitate the identification of the color-changing part 9b. However, the configuration of the present disclosure is not limited thereto, and the main body part 9a may be made of various materials as long as the color-changing part 9b is easily combined and the color-changing part 9b is easily identifiable. The hydrogen sulfide detection part 9 of this embodiment configured as described above may be formed by impregnating the main body part 9a in an impregnating solution containing the color-changing part 9b, but is not limited thereto.

[0083] On the other hand, a voltage supply part 12 may be provided on the base 4, which is respectively connected to the external electrodes 11 of the object under test 10 to supply voltage to the object under test 10. The voltage supply part 12 may be provided at a position corresponding to the external electrodes 11 of the object under test 10, but is not limited thereto. The voltage supply part 12 may be provided at various positions in various forms as long as it can be electrically connected to the external electrodes 11 to charge and discharge the object under test 10.

[0084] Next, based on Figure 4 the operation of the pressurizing device 100 according to this embodiment will be described.

[0085] First, place the object 10 to be measured between the second flat plate 2 and the third flat plate 3, and then adjust the pressure applied by the second flat plate 2 to the object 10 to be measured through the fastening member 5 and the stopper 6.

[0086] Next, apply a voltage to the object 10 to be measured and repeatedly charge and discharge it.

[0087] When the volume of the object 10 to be measured expands due to repeated charging and discharging, the second flat plate 2 and the third flat plate 3 may be pressurized by the expanded object 10 to be measured. At this time, since the third flat plate 3 is fixed to the base 4 and does not move, the object 10 to be measured is supported by the third flat plate 3 and pressurizes the second flat plate 2. Since the pressure display unit 7 is provided between the object 10 to be measured and the second flat plate 2, the pressure generated by the expansion of the object 10 to be measured is applied to the pressure display unit 7. Therefore, the pressure display unit 7 can change its color according to the change in the pressure applied by the object 10 to be measured.

[0088] During this process, one surface of the second flat plate 2 is subjected to the pressure caused by the elastic restoring force of the elastic member 13, and the other surface is subjected to the pressure caused by the expansion of the object 10 to be measured. Therefore, when the pressure applied to the second flat plate 2 due to the volume change of the object 10 to be measured is greater than the elastic restoring force of the elastic member 13, the second flat plate 2 can move in the direction closer to the first flat plate 1. That is, when the volume of the object 10 to be measured expands excessively, the distance between the second flat plate 2 and the third flat plate 3 will correspondingly increase.

[0089] As described above, the pressure display unit 7 of the present embodiment changes its color according to the applied pressure. Therefore, the operator can visually confirm the change in the pressure caused by the expansion of the object 10 to be measured through the color change of the pressure display unit 7. In addition, when a local pressure change occurs in the object 10 to be measured, only the corresponding part of the pressure display unit 7 of the present embodiment changes its color. Therefore, the local pressure change can also be confirmed.

[0090] In other words, the pressure display unit 7 can display the pressure applied to the object 10 to be measured to the outside as visual information through color. In addition, the pressure display unit 7 can display the change in the pressure applied to the object 10 to be measured by the change in color.

[0091] According to one embodiment, the pressure display unit 7 is provided between the second flat plate 2 and the object 10 to be measured, and the pressure display unit 7 can be visually recognized through the first flat plate 1. Thereby, the operator can easily recognize the magnitude and change of the pressure applied to the object 10 to be measured.

[0092] On the other hand, when the object under test 10 of this embodiment includes an inorganic solid electrolyte, if the outer packaging material of the object under test 10 is damaged during the pressurization of the object under test 10, hydrogen sulfide 10 may leak from the object under test. In this case, the pressurizing device 100 of this embodiment can detect the leakage of hydrogen sulfide through the hydrogen sulfide detection unit 9 provided at the lower part of the object under test 10.

[0093] The hydrogen sulfide detection unit 9 includes a color-changing part 9b that changes color upon reaction with hydrogen sulfide, and the color-changing part 9b is arranged integrally along the periphery of the object under test 10. Therefore, hydrogen sulfide leaking from the object under test 10 can easily come into contact with the color-changing part 9b. Thus, the operator can quickly confirm whether hydrogen sulfide is leaking.

[0094] The pressurizing device 100 according to this embodiment configured as described above pressurizes the object under test 10 using the elastic restoring force of the elastic member 13. Therefore, during the test, the pressure applied to the object under test 10 can be kept constant, and when the object under test 10 expands, the elastic member 13 can absorb the influence caused by the volume change of the object under test 10. Thus, during the test, damage to the object under test 10 due to its expansion can be suppressed.

[0095] In addition, in the pressurizing device of this embodiment, the pressure display unit 7 visually displays the pressure change through color change, which can be easily confirmed by the operator with the naked eye. Therefore, various analyses can be performed on the pressure change of the object under test 10.

[0096] Furthermore, the leakage of hydrogen sulfide can be visually detected through the hydrogen sulfide detection unit 9, so abnormalities in all-solid-state battery cells can be detected early during the test.

[0097] Although the embodiments of the present disclosure have been described in detail above, the scope of rights of the present disclosure is not limited thereto. It is obvious to those of ordinary skill in the art that various modifications and variations can be made without departing from the technical idea of the present disclosure recorded in the claims.

[0098] For example, the above embodiments take the case of measuring all-solid-state battery cells as an example, but if the leakage of hydrogen sulfide can be visually detected, it is not necessarily limited thereto.

Claims

1. A battery cell pressurizing device, characterized in that: include: A first plate and a third plate, wherein the first plate and the third plate are spaced apart by a predetermined distance; A second plate is configured to be movable between the first plate and the third plate; as well as a pressure display unit configured to change color according to a pressure change of a battery cell disposed between the second flat plate and the third flat plate, The battery cell is arranged between the pressure display portion and the third flat plate. The color change of the pressure display portion is recognized by naked eyes on the upper portion of the first flat plate.

2. The battery cell pressurizing device according to claim 1, characterized in that: At least a portion of the first plate and the second plate is made of a transparent material.

3. The battery cell pressurizing device according to claim 1, characterized in that: Further including: a plurality of fastening members, one end of each of which is fastened to the third plate, and the other end of each of which protrudes to an upper portion of the first plate; as well as a stopper engaged with a portion of the fastening member protruding to the upper portion of the first flat plate, The second plate is provided to be movable along a length direction of the plurality of fastening members.

4. The battery cell pressurizing device according to claim 3, characterized in that: Further including: The elastic component is arranged between the first flat plate and the second flat plate, and presses the second flat plate toward the battery core side through elastic restoring force.

5. The battery cell pressurizing device according to claim 1, characterized in that: An insertion groove is formed on the lower surface of the second flat plate, and the pressure display part is inserted into the insertion groove.

6. The battery cell pressurizing device according to claim 1, characterized in that: Further including: A pressure dispersing member is provided between the pressure display portion and the battery cell to disperse the pressure applied to the pressure display portion.

7. The battery cell pressurizing device according to claim 6, characterized in that: The pressure dispersion member is formed in a flat pad shape and includes any one of rubber, polyurethane, and silicone.

8. The battery cell pressurizing device according to claim 1, characterized in that: Further including: The hydrogen sulfide detection unit is arranged between the battery cell and the third plate and is used for detecting hydrogen sulfide.

9. The battery cell pressurizing device according to claim 8, characterized in that: The hydrogen sulfide detection unit comprises: a main body portion formed in a flat sheet form; and The color-changing portion is bonded to the main body portion and contains an organic metal compound that changes color by reacting with hydrogen sulfide.

10. The battery cell pressurizing device according to claim 9, characterized in that: The main body is made of a porous material and contains polydimethylsiloxane.

11. A battery cell pressurizing device, characterized in that: include: A hydrogen sulfide detection unit, stacked and arranged at the lower part of the battery cell, for detecting hydrogen sulfide leaked from the battery cell; as well as The pressure display unit is stacked on the upper part of the battery cell and changes color according to the pressure applied by the battery cell. The hydrogen sulfide detection unit includes an organic metal compound that changes color by reacting with hydrogen sulfide.

12. The battery cell pressurizing device according to claim 11, characterized in that: The hydrogen sulfide detection unit includes a porous transparent polydimethylsiloxane pad impregnated with the organic metal compound.

13. The battery cell pressurizing device according to claim 11, characterized in that: Further including: A flat plate is stacked on the upper part of the pressure display part and moves in the up and down direction according to the volume change of the battery cell. At least a portion of the plate is made of a transparent material.

14. A battery cell pressurizing device, characterized in that: include: A first plate and a third plate, wherein the first plate and the third plate are spaced apart from each other along a first direction; A second plate is arranged to be movable along the first direction between the first plate and the third plate; as well as a pressure display unit for visually displaying the magnitude of the pressure applied to the battery cell disposed between the second flat plate and the third flat plate, The pressure display portion changes a displayed color according to a pressure applied to the battery cell.

15. The battery cell pressurizing device according to claim 14, characterized in that: The pressure display portion is provided between the second flat plate and the battery cell, and the pressure display portion is recognized by naked eyes through the first flat plate.

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