Voltage measuring unit, battery cell pressing jig including same, and charging and discharging device including battery cell pressing jig

Abstract

The present application invention relates to a voltage measuring unit, a battery cell pressing jig including same, and a charging and discharging device including the battery cell pressing jig, the voltage measuring unit including: a distance adjustment unit configured to have a form in which two support shafts are coupled to cross each other in an X-shape; bearings coupled to ends of the two support shafts, respectively; springs provided to be restored by elastic force even when the crossing angle of the support shafts of the distance adjustment unit increases; and an electrode lead guide configured to be electrically connected to an electrode lead.

Description

A voltage measuring unit, a battery cell pressing jig including the same, and a charging / discharging device including the battery cell pressing jig

[0001] This application claims the benefit of priority based on Korean Patent Application No. 2024-0158360 filed November 8, 2024 and Korean Patent Application No. 2025-0152456 filed October 21, 2025, and all contents disclosed in the documents of said Korean patent applications are incorporated herein as part of this specification.

[0002] The present invention relates to a voltage measuring unit, a battery cell pressing jig including the same, and a charging / discharging device including the battery cell pressing jig. Specifically, the invention relates to a voltage measuring unit capable of stably connecting to an electrode lead of a battery cell, a battery cell pressing jig capable of stably connecting to an electrode lead of a battery cell when a battery cell is mounted on the charging / discharging device and voltage is measured, and a charging / discharging device including the battery cell pressing jig.

[0003]

[0004] With the increasing technological development and demand in the fields of mobile devices, automobiles, and energy storage devices, the demand for batteries as energy sources is rapidly rising. Among these secondary batteries, extensive research is being conducted on lithium-ion batteries, which possess high energy density and discharge voltage, and they are also being commercialized and widely used.

[0005] In particular, lithium secondary batteries are rapidly growing in popularity because they have an operating voltage of 3.6V or higher, which is three times higher than nickel-cadmium batteries or nickel-hydrogen batteries that are widely used as power sources for portable electronic devices, and have a high energy density per unit weight.

[0006] Lithium secondary batteries can be classified according to the type of case, and can be classified into prismatic and cylindrical battery cells using a metal can as a case, and pouch-type battery cells using a pouch-type battery case made of a laminate sheet.

[0007] Among them, pouch-type battery cells are increasingly being applied as energy sources for various devices due to reasons such as low manufacturing costs, small weight, and easy shape deformation.

[0008] In the latter part of the assembly process, pouch-type battery cells undergo a process of charging and discharging while under pressure and measuring the voltage to check for defects.

[0009] In this way, to measure the voltage of a pouch-type battery cell, the pouch-type battery cell is mounted on a pressure jig and a voltage measuring unit is connected to an electrode lead. However, if the voltage measuring unit is attached to and fixed to the plate of the pressure jig, the connection position between the voltage measuring unit and the electrode lead may differ, resulting in a contact failure.

[0010] In this regard, FIG. 1 is a plan view of a conventional battery cell pressing jig, and FIG. 2 is a plan view of the state before pressing a pouch-type battery cell on the battery cell pressing jig of FIG. 1, the state after pressing the pouch-type battery cell, and the state after removing the pouch-type battery cell.

[0011] Referring to FIGS. 1 and 2, a conventional battery cell pressurizing jig includes a first plate (110) located on the first side of a pouch-type battery cell (10) and a second plate (210) located on the second side, a first pad (120) located between the first plate (110) and the pouch-type battery cell (10), and a second pad (220) located between the second plate (210) and the pouch-type battery cell (10).

[0012] A pouch-type battery cell (10) includes a first electrode lead (11) and a second electrode lead (12), and a first voltage measuring unit (300) connected to the first electrode lead (11) and a second voltage measuring unit (400) connected to the second electrode lead (12) are fixed to a second plate (210).

[0013] The first voltage measuring unit (300) includes a first electrode lead guide (310) having a first insertion part (311) at its end that is coupled with a first electrode lead (11), and the second voltage measuring unit (400) includes a second electrode lead guide (410) having a second insertion part (411) at its end that is coupled with a second electrode lead (12).

[0014] In a conventional battery cell pressure jig, the first voltage measuring part (300) and the second voltage measuring part (400) are fixed to the second plate (210). When a pouch-type battery cell is placed in the battery cell pressure jig as shown in (a), (b), and (c) of FIG. 2, there can be three possible positional relationships between the electrode leads and the voltage measuring parts.

[0015] In FIG. 2 (a), (b), and (c), D0 is the distance from the second plate (210) to the centerline of the second voltage measuring unit (400), so they are all configured identically, but when comparing D1, D2, and D3 representing the distance between the first plate (110) and the second plate (210), D1 is the largest, D2 is smaller than D1, and D3 is smaller than D2.

[0016] That is, the distance between the first plate (110) and the second voltage measuring unit (400) or the first voltage measuring unit (300) varies in (a), (b), and (c), respectively.

[0017] Accordingly, as in (b), D0 can be configured to have the same value as P2 when the battery cell pressure jig is in a state where it firmly adheres to the pouch-type battery cell.

[0018] However, the position where the first electrode lead (11) and the second electrode lead (12) protrude from the pouch-type battery cell (10) is not fixed and can be bent. In the case of (a), the first electrode lead (11) and the second electrode lead (12) are bent upward and move away from at least one of the first insertion part (311) and the second insertion part (411), so that a contact failure may occur between the pouch-type battery cell (10) and the first voltage measuring part (300) or the second voltage measuring part (400).

[0019] Meanwhile, as shown in Fig. 2(c), when the pouch-type battery cell is removed from the battery cell pressure jig and the first plate (110) is positioned close to the first voltage measuring part (300) and the second voltage measuring part (400), the first insertion part (311) and the second insertion part (411) come into contact with the first plate (110). Therefore, the width (w) of the first insertion part (311) and the second insertion part (411) must be limited to 17.2 mm. However, if the width (w) is narrow in this way, interference may occur, such as the electrode lead coming into contact with the outside of the first insertion part (311) and the second insertion part (411), and thus contact failure may occur.

[0020] Therefore, there is a need for technology regarding a battery cell pressurizing jig configured so that the centers of the voltage measuring parts are positioned parallel to the electrode leads of the pouch-type battery cell, regardless of the distance between the plate of the battery cell pressurizing jig and the pouch-type battery cell, and so that the electrode leads and the voltage measuring parts can be stably connected.

[0021]

[0022] The present invention aims to solve the above-mentioned problem by providing a battery cell pressurizing jig configured such that when a pouch-type battery cell is positioned on the battery cell pressurizing jig, the electrode lead guide of the voltage measuring part of the battery cell pressurizing jig is always positioned parallel to the electrode lead of the pouch-type battery cell, and a charging / discharging device including the same.

[0023]

[0024] A voltage measuring unit according to the present invention for achieving such an objective may include a distance adjustment unit formed such that two support shafts are combined to intersect in an X shape, bearings coupled to each end of the two support shafts, springs configured to be restored by elastic force even if the intersection angle of the support shafts of the distance adjustment unit increases, and an electrode lead guide for electrically connecting with an electrode lead.

[0025] In the voltage measuring unit according to the present invention, the bearings may include two first bearings in contact with the first plate and two second bearings in contact with the second plate in the X-shaped distance adjusting unit.

[0026] In the voltage measuring unit according to the present invention, the spring can be coupled to each of the first end and the second end of two support shafts.

[0027] In the voltage measuring unit according to the present invention, the electrode lead guide includes an insertion portion into which the electrode lead of the pouch-type battery cell is inserted, and a pressure fitting portion that is pressed when the electrode lead is inserted may be located on the inner side of the insertion portion.

[0028] In the voltage measuring part according to the present invention, the outer side of the insertion part may be formed in a slanted shape so as to widen toward the end.

[0029] A battery cell pressurizing jig according to the present invention comprises a first plate located on a first side of a pouch-type battery cell, a first pad attached to an outer surface facing the pouch-type battery cell from the first plate, a second plate located on a second side of the pouch-type battery cell, a second pad attached to an outer surface facing the pouch-type battery cell from the second plate, and a voltage measuring unit located between the first plate and the second plate and electrically connected to an electrode lead of the pouch-type battery cell by contacting it, wherein the voltage measuring unit may be formed in a form separated from the first plate and the second plate.

[0030] In the battery cell pressure jig according to the present invention, the first pad may be applied only to the portion of the outer surface of the first plate that contacts the pouch-type battery cell, and the second pad may be applied only to the portion of the outer surface of the second plate that contacts the pouch-type battery cell.

[0031] In the battery cell pressurizing jig according to the present invention, the pouch-type battery cell includes a first electrode lead and a second electrode lead, and the voltage measuring unit may include a first voltage measuring unit electrically connected by contacting the first electrode lead and a second voltage measuring unit electrically connected by contacting the second electrode lead.

[0032] A charging and discharging device including a battery cell pressing jig according to the present invention may include a base member on which a plurality of battery cell pressing jigs are arranged and mounted so as to be stacked side by side, a pressing plate located on one side of the base member and pressing the plurality of battery cell pressing jigs, a support plate located on the other side of the base member and supporting the plurality of battery cell pressing jigs pressed by the pressing plate, and a gripping part coupled to the pressing plate.

[0033] In the charging and discharging device according to the present invention, a mounting part may be further included in which a voltage measuring part is mounted so as to be movable on the plurality of battery cell pressing jigs.

[0034] In the charging and discharging device according to the present invention, when the pressure plate presses the plurality of battery cell pressure jigs, the first plate and the second plate move closer together, the spring of the voltage measuring part can be extended, and the support shaft of the distance adjusting part can be spread apart.

[0035] In the charging and discharging device according to the present invention, when the force of the pressure plate pressing the plurality of battery cell pressure jigs is released, the first plate and the second plate move apart, the spring of the voltage measuring part decreases, and the support axis of the distance adjustment part can be narrowed.

[0036] In the charging and discharging device according to the present invention, the insertion portion into which the electrode lead is inserted in the voltage measuring portion may be located at the center of the distance between the first plate and the second plate.

[0037]

[0038] The present invention can also be provided in a form that combines various means for solving the above problem.

[0039]

[0040] In the battery cell pressurization jig according to the present invention, since the first voltage measuring part and the second voltage measuring part are not fixed to the first plate or the second plate but are located at the center between the first plate and the second plate, the center of the width of the first insertion part of the first voltage measuring part and the center of the width of the second insertion part of the second voltage measuring part can be located on the same plane as the electrode lead of the pouch-type battery cell.

[0041] In addition, since contact interference between the first voltage measuring part and the second voltage measuring part and the first plate and the second plate is reduced, the width of the first insertion part and the width of the second insertion part can be increased, so that when the first voltage measuring part and the second voltage measuring part are coupled with the electrode lead, the occurrence of coupling defects can be minimized.

[0042]

[0043] Figure 1 is a plan view of a conventional battery cell pressurizing jig.

[0044] FIG. 2 is a plan view of the state before pressing the pouch-type battery cell against the battery cell pressing jig of FIG. 1, the state after pressing the pouch-type battery cell, and the state after removing the pouch-type battery cell.

[0045] FIG. 3 is a plan view of the voltage measuring unit of the present invention.

[0046] Fig. 4 is a perspective view of Fig. 3.

[0047] FIG. 5 is a plan view of the state before (a) pressing a pouch-type battery cell in a battery cell pressing jig according to the present invention, the state after pressing the pouch-type battery cell (b), and the state after removing the pouch-type battery cell (c).

[0048] FIG. 6 is a perspective view and a partial enlarged view of a charging and discharging device according to the present invention.

[0049]

[0050] Embodiments that enable a person skilled in the art to easily practice the present invention are described in detail below with reference to the attached drawings. In describing the operating principles of the embodiments of the present invention in detail, specific descriptions of related known functions or configurations are omitted if it is determined that such detailed descriptions may unnecessarily obscure the essence of the present invention.

[0051] The same reference numerals are used for parts having similar functions and operations throughout the drawings. Throughout the specification, when a part is described as being connected to another part, this includes not only cases where they are directly connected but also cases where they are indirectly connected with other elements in between. Furthermore, the inclusion of a certain component means that, unless specifically stated otherwise, it does not exclude other components but rather implies that additional components may be included.

[0052] Descriptions that specify or add components may be applied to all inventions unless specifically limited and are not limited to descriptions of specific inventions.

[0053] Throughout the description of the invention and claims of this application, anything indicated in the singular includes cases where it is plural unless otherwise noted.

[0054] Throughout the description of the invention and the claims of the present invention, "or" includes "and" unless otherwise noted. Therefore, "comprising A or B" means all three of the above cases: including A, including B, or including both A and B.

[0055] The present invention is described in detail with reference to the drawings and embodiments.

[0056] FIG. 3 is a plan view of a voltage measuring unit according to the present invention, FIG. 4 is a perspective view of FIG. 3, and FIG. 5 is a plan view of a pouch-type battery cell before (a) pressing the battery cell pressurizing jig according to the present invention, a state after pressing the pouch-type battery cell (b), and a state after removing the pouch-type battery cell (c).

[0057] Referring to FIGS. 3 to 5, the battery cell pressurizing jig according to the present invention includes a first plate (110) located on the first side of a pouch-type battery cell (10), a first pad (120) attached to the outer surface facing the pouch-type battery cell (10) from the first plate (110), a second plate (210) located on the second side of the pouch-type battery cell (10), a second pad (220) attached to the outer surface facing the pouch-type battery cell (10) from the second plate (210), and a voltage measuring part located between the first plate (110) and the second plate (210) and electrically connected to the electrode lead of the pouch-type battery cell (10).

[0058] The electrode leads of the pouch-type battery cell (10) include a first electrode lead (11) and a second electrode lead (12) that protrude in opposite directions, and the voltage measuring unit includes a first voltage measuring unit (300) that is electrically connected by contacting the first electrode lead (11) and a second voltage measuring unit (400) that is electrically connected by contacting the second electrode lead (12). At this time, the first voltage measuring unit (300) and the second voltage measuring unit (400) are composed of separate members that are not fixed to the first plate (110) and the second plate (210).

[0059] Accordingly, the first voltage measuring unit (300) and the second voltage measuring unit (400) may be in contact with the first plate (110) and the second plate (210), or they may be separated from each other.

[0060] In FIG. 5 (a), the first voltage measuring unit (300) and the second voltage measuring unit (400) are spaced apart from the first plate (110) and the second plate (210), and in FIG. 5 (b), the first voltage measuring unit (300) and the second voltage measuring unit (400) are in contact with the first plate (110) and the second plate (210).

[0061] In FIG. 5, D1, D2 and D3 are distances between the first plate (110) and the second plate (210), D1 is greater than D2 and D3 is smaller than D2.

[0062] In addition, in all of FIG. 5 (a), (b), and (c), the distance between the voltage measuring units and the first plate (110) can be the same as the distance between the voltage measuring units and the second plate (210). That is, in all of FIG. 5 (a), (b), and (c), the distance (P1, P2, P3) between the second voltage measuring unit (400) and the first plate (110) is the same as the distance (P1, P2, P3) between the second voltage measuring unit (400) and the second plate (210).

[0063] At this time, the first voltage measuring unit (300) is considered to be in the same position as the second voltage measuring unit (400) on the horizontal line of the drawing.

[0064] Conventionally, since the first voltage measuring unit (300) and the second voltage measuring unit (400) are attached to the first plate (110), there was a certain limit value in D0 of FIG. 2. Therefore, when a pouch-type battery cell is not placed in the battery cell pressure jig, it was difficult to increase the width of the insertion portion of the electrode lead guides of the first voltage measuring unit (300) and the second voltage measuring unit (400).

[0065] In the present invention, since the first voltage measuring part (300) and the second voltage measuring part (400) are positioned so as not to be biased toward either the first plate (110) or the second plate (210), the size of the insertion part can be increased compared to the width (w) of the conventional battery cell pressing jig. For example, when using the same plates and pouch-type battery cells as the conventional battery cell pressing jig shown in FIGS. 1 and 2, the width (w) of the insertion part in the present invention can be configured to be 23.25 mm. That is, compared to the conventional insertion part width of 17.2 mm, the present invention can be configured to increase by about 35%.

[0066] Therefore, even if the first electrode lead (11) and the second electrode lead (12) of the pouch-type battery cell (10) are bent or folded, the risk of poor contact with the first voltage measuring part (300) and / or the second voltage measuring part (400) can be reduced.

[0067] The first pad (120) and the second pad (220) can function to ensure that the pressure applied by the first plate (110) and the second plate (210) to the pouch-type battery cell (10) is evenly distributed and to prevent damage to the pouch-type battery cell (10).

[0068] Accordingly, the first pad (120) is attached only to the portion of the outer surface of the first plate (110) that contacts the pouch-type battery cell (10), and the second pad (220) is attached only to the portion of the outer surface of the second plate (210) that contacts the pouch-type battery cell (10). That is, the first pad (120) is located only in the center of the first plate (110) and the second pad (220) is located only in the center of the second plate (210), and the first voltage measuring unit (300) and the second voltage measuring unit (400) face the first plate (110) without the first pad (120) and face the second plate (210) without the second pad (120).

[0069] FIGS. 3 and FIGS. 4 illustrate the first voltage measuring unit (300), and the description thereof applies equally to the second voltage measuring unit (400).

[0070] The first voltage measuring unit (300) comprises a distance adjustment unit formed such that two support shafts (320) are combined in an X-shape, bearings (330) coupled to each end of the two support shafts (320), springs (340) for being restored by elastic force after the angle of the support shafts (320) of the distance adjustment unit increases, and a first electrode lead guide (310) for electrically connecting to the first electrode lead (11) and the second electrode lead (12). The springs (340) are coupled to the first end (301) and the second end (302) of the two support shafts (320).

[0071] The spring (340) can prevent the angle of intersection from becoming too large when the two support shafts (320) are crossed in an X shape, and conversely, the angle of intersection of the support shafts (320) can be reduced by the elastic force of the spring (340). For example, when the first plate (110) and the second plate (210) press the pouch-type battery cell (10), the angle of intersection of the support shafts (320) in an X shape is at its maximum, and when the state in which the first plate (110) and the second plate (210) press the pouch-type battery cell (10) is released, the angle of intersection of the two support shafts (320) can be reduced by the restoring force due to the elastic force of the spring.

[0072] The first electrode lead guide (310) includes a first insertion part (311) into which the electrode lead of a pouch-type battery cell is inserted, and a first pressure part (312) is located inside the first insertion part (311) to be pressed when the electrode lead is inserted. For example, the first pressure part (312) may be configured in the form of a pogo pin, so that the electrode lead can be coupled by pressing the first pressure part (312).

[0073] The outer side of the first insertion part (311) is formed in a slanted shape that widens toward the end. Therefore, even if the first electrode lead (11) and the second electrode lead (12) are bent or folded, as long as they do not exceed the width (w) of the end of the first insertion part (311), the first electrode lead (11) and the second electrode lead (12) can be inserted into the first insertion part (311) and coupled by pressing the first pressure part (312). As a result, the electrode lead and the first voltage measuring part are electrically connected, allowing voltage measurement to be performed while charging and discharging the pouch-type battery cell.

[0074] The present invention is configured such that the width (w) of the first insertion part (311) is widened, and is optimized for the first electrode lead (11) and the second electrode lead (12) to be inserted into the first insertion part (311) and to be stably coupled.

[0075] FIG. 6 is a perspective view and a partial enlarged view of a charging and discharging device according to the present invention.

[0076] Referring to FIG. 6, the charging and discharging device (500) according to the present invention comprises a base member (510) on which a plurality of battery cell pressing jigs are arranged and mounted so as to be stacked side by side, a pressing plate (520) located on one side of the base member (510) to press the plurality of battery cell pressing jigs, a support plate (530) located on the other side of the base member (510) to support the plurality of battery cell pressing jigs that are pressed by the pressing plate (520), and a gripping part (540) coupled to the pressing plate (520).

[0077] It further includes a mounting part (550) in which the first voltage measuring part and the second voltage measuring part are movably mounted in a plurality of battery cell pressure jigs.

[0078] For example, the mounting portion (550) is configured to penetrate a plurality of battery cell pressing jigs, and the plurality of battery cell pressing jigs can move in a horizontal direction parallel to the upper surface of the base member (510) with the mounting portion (550) as a fixed axis.

[0079] The charging and discharging device (500) arranges pouch-type battery cells between the first plate and the second plate while the first plate and the second plate of a plurality of battery cell pressing jigs are spaced apart.

[0080] In order to measure the voltage while the above pouch-type battery cell is in a pressurized state, when the pressure plate (520) is pressed in the direction of the support plate (530), the first plate, the second plates, and the voltage measuring unit move toward the support plate (530), and the pouch-type battery cells are in a state of close contact with the first plate and the second plate.

[0081] At this time, the first voltage measuring unit and the second voltage measuring unit located between the first plate and the second plate also move toward the support plate (530) and come into contact with the first plate and the second plate, and the distance between the center of the first voltage measuring unit and the second voltage measuring unit and the first plate, and the distance between the center of the first voltage measuring unit and the second voltage measuring unit and the second plate become equal.

[0082] That is, in all states including before the pouch-type battery cell is pressurized by the charging / discharging device, the state of being pressurized, and the state of removing the pouch-type battery cell from the charging / discharging device, the insertion part into which the first electrode lead (11) and the second electrode lead (12) are inserted in the first voltage measuring part (300) and the second voltage measuring part (400) is located at the center of the distance between the first plate (110) and the second plate (210).

[0083] Referring to FIG. 6 together with FIG. 3 and FIG. 4, the bearings (330) include two first bearings (331) in contact with the first plate (110) and two second bearings (332) in contact with the second plate (210) in the X-shaped distance adjustment section. When the first plate (110) and the second plate (210) are brought closer to each other, the first bearings (331) come into contact with the first plate (110), and the second bearings (332) come into contact with the second plate (210). When the first plate (110) and the second plate (210) are brought closer together and the pouch-type battery cell (10) is pressed, the first bearings (331) move along the surface of the first plate (110) and the second bearings (332) move along the surface of the second plate (210), causing the X-shaped intersection angle of the support shaft (320) to increase.

[0084] Since the present invention is equipped with bearings at the end of the support shaft (320), the frictional force between the bearings and the first plate (110) and the second plate (210) can be minimized. Accordingly, the pressure applied to the first plate (110) and the second plate (210) by the pressure plate (520) can be transmitted as a force to press the pouch-type battery cell (10).

[0085] Additionally, after the first plate (110) and the second plate (210) pressurize the pouch-type battery cell (10), the first voltage measuring unit (300) moves toward the first electrode lead (11) and the second voltage measuring unit (400) moves toward the second electrode lead (12), at which time the first voltage measuring unit (300) and the second voltage measuring unit (400) can be easily moved by the rotation of the bearings.

[0086] The process of pressurizing a pouch-type battery cell and the process of releasing the pressurization in a charging and discharging device according to the present invention are described.

[0087] First, when the pressure plate (520) presses the plurality of battery cell pressure jigs, the first plate (110) and the second plate (210) move closer together, the spring (340) of the first voltage measuring unit (300) and the second voltage measuring unit (400) extends, and the support shaft (320) of the distance adjustment unit spreads apart.

[0088] Meanwhile, when the force of the pressure plate (520) pressing the plurality of battery cell pressure jigs is released, the first plate (110) and the second plate (210) move away, the spring (340) of the first voltage measuring unit (300) and the second voltage measuring unit (400) contracts, and the support shaft (320) of the distance adjustment unit narrows.

[0089] In this way, in the charging and discharging device according to the present invention, since the spring (340) is fixed to the support shaft (320), when the force pressing the pouch-type battery cell (10) by the first plate (110) and the second plate (210) is released, the X-shaped angle of the first support shaft (320) can be narrowed due to the elastic force of the spring (340) and returned to its previous shape.

[0090]

[0091] A person skilled in the art to which the present invention pertains would be able to perform various applications and modifications within the scope of the present invention based on the above content.

[0092]

[0093] (Explanation of symbols)

[0094] 10: Pouch-type battery cell

[0095] 11: First electrode lead

[0096] 12: Second electrode lead

[0097] 110: First plate

[0098] 120: 1st pad

[0099] 210: Second plate

[0100] 220: 2nd pad

[0101] 300: First voltage measuring unit

[0102] 301: 1st side

[0103] 302: Second side

[0104] 310: First electrode lead guide

[0105] 311: First insertion part

[0106] 312: First welding section

[0107] 320: Support axis

[0108] 330: Bearing

[0109] 331: 1st bearing

[0110] 332: Second bearing

[0111] 340: Spring

[0112] 400: Second voltage measuring unit

[0113] 410: Second electrode lead guide

[0114] 411: Second insertion

[0115] 500: Charging and discharging device

[0116] 510: Base member

[0117] 520: Pressure plate

[0118] 530: Support plate

[0119] 540: Waste paper

[0120] 550: Mounting part

Claims

1. A distance adjustment unit formed by combining two support axes so that they intersect in an X shape; Bearings coupled to each end of the two support shafts above; Springs provided to be restored by elastic force even if the intersection angle of the support axes of the distance adjustment unit increases; and Electrode lead guide for electrically connecting to the electrode lead; A voltage measuring unit including 2. In Paragraph 1, The above bearings include a voltage measuring unit comprising two first bearings in contact with the first plate and two second bearings in contact with the second plate in the X-shaped distance adjustment unit.

3. In Paragraph 1, The above spring is a voltage measuring part coupled to the first end and the second end of each of the two support shafts.

4. In Paragraph 1, The above electrode lead guide includes an insertion portion into which the electrode lead of the pouch-type battery cell is inserted, and A voltage measuring part having a pressure joint located on the inner side of the insertion part, which is pressed when the electrode lead is inserted.

5. In Paragraph 4, A voltage measuring part having an outer side of the above-mentioned insertion part formed in a slanted shape that widens toward the end.

6. A first plate located on the first side of a pouch-type battery cell; A first pad attached to the outer surface facing the pouch-type battery cell on the first plate; A second plate located on the second side of the above pouch-type battery cell; A second pad attached to the outer surface facing the pouch-type battery cell on the second plate; and A voltage measuring unit positioned between the first plate and the second plate and electrically connected by contacting the electrode lead of the pouch-type battery cell; comprising The above voltage measuring part is a battery cell pressurizing jig formed in a separated form from the first plate and the second plate.

7. In Paragraph 6, The first pad is applied only to the portion of the outer surface of the first plate that contacts the pouch-type battery cell, and The above second pad is a battery cell pressure jig that is added only to the portion of the outer surface of the above second plate that contacts the pouch-type battery cell.

8. In Paragraph 6, The above pouch-type battery cell includes a first electrode lead and a second electrode lead, and The above voltage measuring unit comprises a first voltage measuring unit electrically connected by contacting the first electrode lead and a second voltage measuring unit electrically connected by contacting the second electrode lead, forming a battery cell pressure jig.

9. A charging and discharging device comprising a battery cell pressurizing jig according to any one of claims 6 to 8, A base member on which a plurality of battery cell pressure jigs are arranged and mounted so as to be stacked side by side; A pressure plate located on one side of the base member and pressing the plurality of battery cell pressure jigs; A support plate located on the other side of the base member and supporting the plurality of battery cell pressure jigs that are pressed by the pressure plate; and A gripping part coupled to the above pressure plate; A charging and discharging device including 10. In Paragraph 9, A charging and discharging device further comprising a mounting portion in which a voltage measuring portion is mounted so as to be movable in the plurality of battery cell pressing jigs.

11. In Paragraph 9, A charging and discharging device in which, when the above-mentioned pressure plate presses the above-mentioned plurality of battery cell pressure jigs, the first plate and the second plate move closer together, the spring of the voltage measuring part extends, and the support shaft of the distance adjusting part spreads apart.

12. In Paragraph 9, A charging and discharging device in which, when the force of the above-mentioned pressure plate pressing the plurality of battery cell pressure jigs is released, the first plate and the second plate move apart, the spring of the voltage measuring part decreases, and the support axis of the distance adjusting part narrows.

13. In the 9th, A charging and discharging device in which the insertion portion into which the electrode lead is inserted in the voltage measuring portion is located at the center of the distance between the first plate and the second plate.

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