Voltage measurement unit, battery cell pressing jig including the same, and charging and discharging apparatus including the same

Abstract

The present application relates to a voltage measurement unit including a distance adjustment part configured to have a form in which two support shafts are coupled to cross each other in an X shape, a bearing coupled to end portions of the two support shafts, respectively, a spring provided to be restored by an elastic force even when a crossing angle of the support shafts of the distance adjustment part increases, and an electrode lead guide configured to be electrically connected to an electrode lead, a battery cell pressing jig including the voltage measurement unit, and a charging and discharging device including the battery cell pressing jig.

Description

Technical Field

[0001] This application claims priority to Korean Patent Application No. 2024-0158360, filed on November 8, 2024, and Korean Patent Application No. 2025-0152456, filed on October 21, 2025, the disclosure of which is incorporated herein by reference in its entirety.

[0002] This invention relates to a voltage measuring unit, a battery cell compression clamp including the voltage measuring unit, and a charging and discharging device including the battery cell compression clamp. More specifically, this invention relates to a voltage measuring unit capable of stably connecting to the electrode leads of a battery cell, a battery cell compression clamp capable of stably connecting to the electrode leads of the battery cell when the battery cell is mounted on a charging and discharging device and measuring the voltage of the battery cell, and a charging and discharging device including the battery cell compression clamp. Background Technology

[0003] With the technological advancements in mobile devices, vehicles, and energy storage systems, and the increasing demands they generate, the need for batteries as energy sources has surged. Among these secondary batteries, lithium-ion batteries, characterized by high energy density and high discharge voltage, have been extensively researched and have been commercialized and widely used.

[0004] In particular, lithium-ion batteries operate at 3.6V or higher, which is three times higher than that of nickel-cadmium or nickel-metal hydride batteries, which are commonly used as power sources for portable electronic devices. Furthermore, lithium-ion batteries have rapidly gained attention due to their high energy density per unit weight.

[0005] Based on the type of casing, lithium secondary batteries can be classified into prismatic battery cells that use a metal can as the casing, cylindrical battery cells that use a metal can as the casing, and pouch battery cells that use a pouch-shaped battery casing made of laminated sheets.

[0006] Among battery cells, pouch cells are increasingly being used as energy sources for various devices due to their low manufacturing cost, light weight, and ease of deformation.

[0007] In order to determine whether there are defects in the pouch battery cells in the later part of the assembly process, the voltage of the pouch battery cells is measured while they are being charged and discharged under a compressed state.

[0008] To measure the voltage of a pouch cell, the cell is mounted on a compression clamp, and a voltage measuring unit is connected to the electrode leads. However, if the voltage measuring unit is attached and fixed to the plate of the compression clamp, the connection position between the voltage measuring unit and the electrode leads may change, potentially leading to poor contact.

[0009] in this regard, Figure 1 It is a plan view of a traditional battery cell extrusion fixture, and Figure 2 It is shown by Figure 1 Plan view of the state before the battery cell extrusion fixture extrudes the pouch battery cell, the state of the pouch battery cell being extruded by the battery cell extrusion fixture, and the state of the pouch battery cell after being removed from the battery cell extrusion fixture.

[0010] refer to Figure 1 and Figure 2 A conventional battery cell extrusion fixture includes a first plate 110 located on a first side of a pouch-shaped battery cell 10 and a second plate 210 located on a second side of a pouch-shaped battery cell 10, wherein a first pad 120 is located between the first plate 110 and the pouch-shaped battery cell 10, and a second pad 220 is located between the second plate 210 and the pouch-shaped battery cell 10.

[0011] The pouch-shaped 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.

[0012] The first voltage measurement unit 300 includes a first electrode lead guide 310 having a first insertion portion 311 formed at one end thereof for connection to the first electrode lead 11, and the second voltage measurement unit 400 includes a second electrode lead guide 410 having a second insertion portion 411 formed at one end thereof for connection to the second electrode lead 12.

[0013] In a traditional battery cell extrusion fixture, the first voltage measuring unit 300 and the second voltage measuring unit 400 are fixed to the second plate 210. For example... Figure 2 As shown in (a), (b), and (c), when a pouch cell is placed on a cell compression fixture, there are three possible positional relationships between the electrode leads and the voltage measurement unit.

[0014] exist Figure 2In (a), (b), and (c), D0 is the distance from the center line of the second plate 210 to the second voltage measuring unit 400, so D0 is consistent. However, when comparing D1, D2, and D3, which represent 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.

[0015] In other words, the distance from the first plate 110 to the second voltage measuring unit 400 or the first voltage measuring unit 300 is different in (a), (b) and (c), respectively.

[0016] Therefore, when the cell extrusion clamp firmly extrudes the pouch cell, D0 can be configured to have the same value as P2, as shown in (b).

[0017] However, the positions where the first electrode lead 11 and the second electrode lead 12 protrude from the pouch cell 10 may not be fixed, and the first electrode lead 11 and the second electrode lead 12 may be bent. In case (a), the first electrode lead 11 and the second electrode lead 12 may be bent upwards, thereby potentially causing the first electrode lead 11 and the second electrode lead 12 to deviate from at least one of the first insertion portion 311 and the second insertion portion 411, which may result in poor contact between the pouch cell 10 and the first voltage measuring unit 300 or the second voltage measuring unit 400.

[0018] At the same time, such as Figure 2 As shown in (c), when the pouch-shaped battery cell is removed from the battery cell extrusion jig and the first plate 110 is positioned close to the first voltage measuring unit 300 and the second voltage measuring unit 400, the first insertion portion 311 and the second insertion portion 411 contact the first plate 110. Therefore, the width w of each of the first insertion portion 311 and the second insertion portion 411 must be limited to 17.2 mm. However, with such a small width w, interference may occur, such as electrode leads contacting the outside of the first insertion portion 311 and the second insertion portion 411, potentially leading to poor contact.

[0019] Therefore, there is a need for a battery cell extrusion clamp that is configured such that the center of the voltage measuring unit is positioned parallel to the electrode leads of the pouch battery cell, regardless of the distance between the plate of the battery cell extrusion clamp and the pouch battery cell, and the electrode leads and the voltage measuring unit can be stably connected to each other. Summary of the Invention

[0020] [Technical Issues]

[0021] In view of the above problems, the present invention has been made, and the object of the present invention is to provide a battery cell extrusion clamp and a charging and discharging device including the battery cell extrusion clamp, the battery cell extrusion clamp being configured such that when a pouch battery cell is located on the battery cell extrusion clamp, the electrode lead guide of the voltage measuring unit of the battery cell extrusion clamp is always positioned parallel to the electrode lead of the pouch battery cell.

[0022] [Technical Solution]

[0023] The voltage measuring unit according to the present invention for achieving the above-mentioned objective comprises: a distance adjustment section consisting of two support shafts connected in an X-shaped cross; a bearing connected to the ends of the two support shafts; a spring configured to recover by elastic force even if the cross angle between the support shafts of the distance adjustment section increases; and an electrode lead guide electrically connected to the electrode leads.

[0024] In the voltage measuring unit according to the invention, in the X-shaped distance adjustment section, the bearing may include two first bearings configured to contact the first plate and two second bearings configured to contact the second plate.

[0025] In the voltage measuring unit according to the invention, the spring can be connected to the ends on the first side and the second side of the two support shafts, respectively.

[0026] In the voltage measurement unit according to the invention, the electrode lead guide may include an insertion portion into which the electrode lead of the pouch cell is inserted, and a compression contact portion may be located in the insertion portion, the compression contact portion being compressed by the electrode lead when the electrode lead is inserted into the insertion portion.

[0027] In the voltage measuring unit according to the invention, the outer side of the insertion portion can be formed as an inclined shape that gradually widens toward the end.

[0028] The battery cell extrusion clamp according to the present invention includes a first plate located on a first side of a pouch-shaped battery cell, a first pad attached to the first plate facing the outer surface of the pouch-shaped battery cell, a second plate located on a second side of the pouch-shaped battery cell, a second pad attached to the second plate facing the outer surface of the pouch-shaped battery cell, and a voltage measuring unit located between the first plate and the second plate, the voltage measuring unit being electrically connected to the electrode leads of the pouch-shaped battery cell when in contact with the electrode leads of the pouch-shaped battery cell.

[0029] In the battery cell extrusion fixture according to the invention, the first pad may be added only to the portion of the outer surface of the first plate that contacts the pouch-shaped battery cell, and the second pad may be added only to the portion of the outer surface of the second plate that contacts the pouch-shaped battery cell.

[0030] In the battery cell extrusion fixture according to the present invention, the pouch-shaped battery cell may include a first electrode lead and a second electrode lead, and the voltage measuring unit may include a first voltage measuring unit and a second voltage measuring unit, wherein the first voltage measuring unit is electrically connected to the first electrode lead when in contact with the first electrode lead, and the second voltage measuring unit is electrically connected to the second electrode lead when in contact with the second electrode lead.

[0031] A charging and discharging apparatus according to the present invention, including battery cell extrusion clamps, comprises: a base member configured to allow a plurality of battery cell extrusion clamps to be mounted to the base member for side-by-side stacking; an extrusion plate located on one side of the base member and configured to extrude the plurality of battery cell extrusion clamps; a support plate located on the other side of the base member and configured to support the plurality of battery cell extrusion clamps extruded by the extrusion plate; and a clamping portion coupled to the extrusion plate.

[0032] The charging and discharging device according to the invention may further include a mounting portion configured to allow the voltage measuring unit of the plurality of battery cell compression clamps to be movably mounted to the mounting portion.

[0033] In the charging and discharging apparatus according to the invention, when the extrusion plate extrudes the plurality of battery cell extrusion clamps, the first plate and the second plate can approach each other, thereby stretching the spring of the voltage measuring unit and unfolding the support shaft of the distance adjustment part.

[0034] In the charging and discharging apparatus according to the invention, when the force applied by the extrusion plate to the plurality of battery cell extrusion clamps is released, the first plate and the second plate can move apart from each other, thereby causing the spring of the voltage measuring unit to contract and the support shaft of the distance adjustment part to move closer together.

[0035] In the charging and discharging apparatus according to the invention, the insertion portion of the voltage measuring unit into which the electrode leads are inserted can be located at the midpoint between the first plate and the second plate.

[0036] Furthermore, the present invention can provide various combinations of the above-mentioned solutions.

[0037] [Beneficial Effects]

[0038] In the battery cell extrusion fixture according to the present invention, the first voltage measuring unit and the second voltage measuring unit are not fixed to the first plate or the second plate, but are located at the midpoint between the first plate and the second plate, thereby making the width center of the first insertion part of the first voltage measuring unit and the width center of the second insertion part of the second voltage measuring unit located on the same plane as the electrode leads of the pouch battery cell.

[0039] Furthermore, the contact interference between the first and second voltage measuring units and the first plate, as well as between the first and second voltage measuring units and the second plate, is reduced, thereby increasing the width of the first insertion portion and the width of the second insertion portion. Therefore, when the first and second voltage measuring units are connected to the electrode leads, poor connections can be minimized. Attached Figure Description

[0040] Figure 1 This is a plan view of a traditional battery cell extrusion fixture.

[0041] Figure 2 It is shown by Figure 1 A plan view showing the state of the pouch-shaped battery cell before it is squeezed by the battery cell extrusion fixture, the state of the pouch-shaped battery cell being squeezed by the battery cell extrusion fixture, and the state of the pouch-shaped battery cell after it is removed from the battery cell extrusion fixture.

[0042] Figure 3 This is a plan view of the voltage measurement unit of the present invention.

[0043] Figure 4 yes Figure 3 Perspective view.

[0044] Figure 5 This is a plan view showing the state (a) before the pouch-shaped battery cell is squeezed by the battery cell squeezing jig according to the invention, the state (b) of the pouch-shaped battery cell being squeezed by the battery cell squeezing jig, and the state (c) after the pouch-shaped battery cell is removed from the battery cell squeezing jig.

[0045] Figure 6 These are perspective views and partial enlarged views of the charging and discharging device according to the present invention. Detailed Implementation

[0046] Preferred embodiments of the invention will now be described in detail with reference to the accompanying drawings, so that these preferred embodiments can be readily implemented by those skilled in the art. However, in describing the operating principles of the preferred embodiments of the invention in detail, detailed descriptions of known functions and structures incorporated herein will be omitted where such descriptions might obscure the subject matter of the invention.

[0047] Throughout the accompanying drawings, the same reference numerals will be used to refer to parts that perform similar functions or operations. Where it is stated throughout the specification that one part is connected to another part, this means not only that one part can be directly connected to the other part, but also that one part can be indirectly connected to the other part via the other part. Furthermore, including an element does not mean excluding other elements, but rather means that further such elements can be included, unless otherwise specified.

[0048] Descriptions of elements by limiting or adding to them can be applied to all inventions unless otherwise specified, and do not limit any particular invention.

[0049] Throughout the specification and claims of this application, unless otherwise stated, the singular form is intended to include the plural form.

[0050] Throughout the specification and claims of this application, unless otherwise stated, "or" includes "and". Therefore, "including A or B" means three cases: including A, including B, and including both A and B.

[0051] Embodiments of the invention will be described in more detail with reference to the accompanying drawings.

[0052] Figure 3 This is a plan view of the voltage measurement unit of the present invention. Figure 4 yes Figure 3 The perspective view, and Figure 5 This is a plan view showing the state (a) before the pouch-shaped battery cell is squeezed by the battery cell squeezing jig according to the invention, the state (b) after the pouch-shaped battery cell is squeezed by the battery cell squeezing jig, and the state (c) after the pouch-shaped battery cell is removed from the battery cell squeezing jig.

[0053] refer to Figures 3 to 5 The battery cell extrusion clamp according to the present invention includes a first plate 110 located on a first side of a pouch-shaped battery cell 10, a first pad 120 attached to the first plate 110 facing the outer surface of the pouch-shaped battery cell 10, a second plate 210 located on a second side of the pouch-shaped battery cell 10, a second pad 220 attached to the second plate 210 facing the outer surface of the pouch-shaped battery cell 10, and a voltage measuring unit located between the first plate 110 and the second plate 210, the voltage measuring unit being electrically connected to the electrode leads of the pouch-shaped battery cell 10 when in contact with the electrode leads of the pouch-shaped battery cell 10.

[0054] The pouch-shaped battery cell 10 includes a first electrode lead 11 and a second electrode lead 12 protruding in opposite directions, and a voltage measuring unit includes a first voltage measuring unit 300 and a second voltage measuring unit 400. The first voltage measuring unit 300 is electrically connected to the first electrode lead 11 when in contact with it, and the second voltage measuring unit 400 is electrically connected to the second electrode lead 12 when in contact with it. In this configuration, the first voltage measuring unit 300 and the second voltage measuring unit 400 are separate components not fixed to the first plate 110 and the second plate 210.

[0055] Therefore, the first voltage measuring unit 300 and the second voltage measuring unit 400 can be in contact with the first plate 110 and the second plate 210 respectively, or they can be spaced apart from the first plate 110 and the second plate 210 respectively.

[0056] exist Figure 5 In (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, respectively. Figure 5 In (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, respectively.

[0057] exist Figure 5 In the diagram, D1, D2, and D3 are the distances between the first plate 110 and the second plate 210, where D1 is greater than D2 and D3 is less than D2.

[0058] In addition, Figure 5 In (a), (b), and (c), the distance between the voltage measuring unit and the first plate 110 can be equal to the distance between the voltage measuring unit and the second plate 210. That is, in Figure 5 In (a), (b) and (c), the distances P1, P2 and P3 between the second voltage measuring unit 400 and the first plate 110 are equal to the distances P1, P2 and P3 between the second voltage measuring unit 400 and the second plate 210.

[0059] At this point, the first voltage measuring unit 300 is considered to be located at the same position as the second voltage measuring unit 400 on the horizontal line of the figure.

[0060] Traditionally, the first voltage measurement unit 300 and the second voltage measurement unit 400 are attached to the first plate 110, thereby Figure 1 The D0 value has a certain limit. Therefore, when the pouch-shaped battery cell is not placed in the battery cell extrusion fixture, it is difficult to increase the width of the insertion portion of the electrode lead guide of the first voltage measuring unit 300 and the second voltage measuring unit 400.

[0061] In this invention, the first voltage measuring unit 300 and the second voltage measuring unit 400 are positioned so as not to be biased toward either the first plate 110 or the second plate 210, thereby allowing the width w of the insertion portion to be greater than the width of the insertion portion in a conventional battery cell extrusion fixture. For example, when using with Figure 1 and Figure 2 When using the same plate and pouch-shaped battery cells in a conventional battery cell extrusion fixture, the width w of the insertion portion in this invention can be 23.25 mm. That is, compared to the width of the conventional insertion portion (which is 17.2 mm), an increase of approximately 35% can be achieved.

[0062] Therefore, even if the first electrode lead 11 and the second electrode lead 12 of the pouch cell 10 are bent or twisted, the risk of poor contact between the first electrode lead 11 and the second electrode lead 12 and the first voltage measuring unit 300 and / or the second voltage measuring unit 400 can be reduced.

[0063] The first pad 120 and the second pad 220 can ensure that the compressive force applied to the pouch cell 10 by the first plate 110 and the second plate 210 is uniform and can prevent damage to the pouch cell 10.

[0064] Therefore, the first pad 120 is added only to the portion of the outer surface of the first plate 110 that contacts the pouch cell 10, and the second pad 220 is added only to the portion of the outer surface of the second plate 210 that contacts the pouch cell 10. That is, the first pad 120 is located only at the center of the first plate 110, and the second pad 220 is located only at the center of the second plate 210. Furthermore, the first voltage measuring unit 300 and the second voltage measuring unit 400 face the first plate 110 without the first pad 120 and the second plate 210 without the second pad 120.

[0065] Figure 3 and Figure 4 The first voltage measuring unit 300 is shown, and its description also applies to the second voltage measuring unit 400.

[0066] The first voltage measuring unit 300 includes: a distance adjustment section consisting of two support shafts 320 connected in an X-shaped intersection; a bearing 330 connected to the ends of the two support shafts 320; a spring 340 configured to recover by elastic force after the angle between the support shafts of the distance adjustment section increases; and a first electrode lead guide 310 electrically connected to a first electrode lead 11 and a second electrode lead 12. The spring 340 is respectively connected to the ends on the first side 301 and the second side 302 of the two support shafts 320.

[0067] The spring 340 prevents the cross angle between the two support shafts 320 from becoming too large when the two support shafts 320 are connected in an X-shaped cross configuration. Conversely, the elastic force of the spring 340 can be used to reduce the cross angle between the support shafts 320. For example, the X-shaped cross angle between the two support shafts 320 is at its maximum when the first plate 110 and the second plate 210 compress the pouch-shaped battery cell 10, and when the state of compression of the pouch-shaped battery cell 10 by the first plate 110 and the second plate 210 is released, the restoring force caused by the elastic force of the spring can reduce the cross angle between the two support shafts 320.

[0068] The first electrode lead guide 310 includes a first insertion portion 311 into which the electrode lead of the pouch cell is inserted, and a first compression contact portion 312 located within the first insertion portion 311. The first compression contact portion 312 is configured to be compressed by the electrode lead when it is inserted into the first insertion portion 311. For example, the first compression contact portion 312 may be composed of a pogo pin, and the electrode lead may be connected to the first compression contact portion 312 while it is being compressed.

[0069] The outer side of the first insertion portion 311 is formed into an inclined shape that gradually widens towards the end. Therefore, even if the first electrode lead 11 and the second electrode lead 12 are bent or twisted, as long as the first electrode lead 11 and the second electrode lead 12 do not deviate from the width w of the end of the first insertion portion 311, they can be inserted into the first insertion portion 311 and connected to the first compression contact portion 312 while pressing the first compression contact portion 312. Therefore, the electrode leads are electrically connected to the first voltage measuring unit, thereby allowing the voltage of the pouch cell to be measured while charging and discharging the pouch cell.

[0070] In this invention, the width w of the first insertion portion 311 is large, which optimizes the insertion of the first electrode lead 11 and the second electrode lead 12 into the first insertion portion 311 and the stable connection to the first insertion portion 311.

[0071] Figure 6 These are perspective views and partial enlarged views of the charging and discharging device according to the present invention.

[0072] refer to Figure 6The charging and discharging device 500 according to the present invention includes: a base member 510 configured to allow a plurality of battery cell extrusion clamps to be mounted to the base member 510 for side-by-side stacking; an extrusion plate 520 located on one side of the base member 510 and configured to extrude the plurality of battery cell extrusion clamps; a support plate 530 located on the other side of the base member 510 and configured to support the plurality of battery cell extrusion clamps extruded by the extrusion plate 520; and a clamping portion 540 coupled to the extrusion plate 520.

[0073] The charging and discharging device also includes a mounting section 550, which is configured to allow a first voltage measuring unit and a second voltage measuring unit of a plurality of battery cell compression clamps to be movably mounted to the mounting section 550.

[0074] For example, the mounting portion 550 can be configured to pass through multiple battery cell extrusion clamps, and the multiple battery cell extrusion clamps can move horizontally about the mounting portion 550 as a fixed axis parallel to the upper surface of the base member 510.

[0075] In the charging and discharging device 500, with the first plate and the second plate placed spaced apart from each other, the pouch-shaped battery cell is placed between the first plate and the second plate of each of the plurality of battery cell extrusion clamps.

[0076] When the extrusion plate 520 presses toward the support plate 530 to measure the voltage of the pouch cell while it is being extruded, the first plate, the second plate, and the voltage measuring unit move toward the support plate 530, thereby bringing each pouch cell into close contact with the first and second plates.

[0077] 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, thereby making close contact between the first voltage measuring unit and the second voltage measuring unit and the first plate, and the distance between the center of each of the first voltage measuring unit and the first plate and the distance between the center of each of the first voltage measuring unit and the second plate are equal.

[0078] In other words, in all states including the state before the pouch battery cell is squeezed by the charging and discharging device, the state after the pouch battery cell is removed from the charging and discharging device, the insertion portion of each of the first voltage measuring unit 300 and the second voltage measuring unit 400 into which the first electrode lead 11 and the second electrode lead 12 are inserted is located at the midpoint between the first plate 110 and the second plate 210.

[0079] Together Figure 3 and Figure 4 Let's refer to each other. Figure 6 The bearing 330 of the X-shaped distance adjustment section includes two first bearings 331 configured to contact the first plate 110 and two second bearings 332 configured to contact the second plate 210. When the first plate 110 and the second plate 210 approach each other, the first bearings 331 contact the first plate 110 and the second bearings 332 contact the second plate 210. When the first plate 110 and the second plate 210 are closer together, the pouch-shaped battery cell 10 is compressed, thereby causing the first bearings 331 to move along the surface of the first plate 110 and the second bearings 332 to move along the surface of the second plate 210, thereby increasing the X-shaped intersection angle between the support shafts 320.

[0080] In this invention, the bearing is disposed at the end of the support shaft 320, thereby minimizing the frictional force between the bearing and the first plate 110 and the second plate 210. Therefore, the compressive force applied to the first plate 110 and the second plate 210 by the extrusion plate 520 can be transmitted to the pouch cell 10, so that the pouch cell can be compressed.

[0081] Furthermore, after the first plate 110 and the second plate 210 compress the pouch 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 this time, the first voltage measuring unit 300 and the second voltage measuring unit 400 can move easily due to the rotation of the bearing.

[0082] The process of applying force to and releasing force in the charging and discharging device according to the present invention will now be described.

[0083] First, when the extrusion plate 520 extrudes multiple battery cell extrusion fixtures, the first plate 110 and the second plate 210 approach each other, thereby stretching the springs 340 of the first voltage measuring unit 300 and the second voltage measuring unit 400 and unfolding the support shaft 320 of the distance adjustment part.

[0084] At the same time, when the force applied by the extrusion plate 520 to the multiple battery cell extrusion clamps is released, the first plate 110 and the second plate 210 move apart from each other, thereby causing the springs 340 of the first voltage measuring unit 300 and the second voltage measuring unit 400 to contract and the support shaft 320 of the distance adjustment unit to move closer together.

[0085] In the charging and discharging device according to the invention, as described above, the spring 340 is fixed to the support shaft 320, so that when the force applied to the pouch cell 10 by the first plate 110 and the second plate 210 is released, the elastic force of the spring 340 causes the X-angle between the first support shafts 320 to decrease, thereby allowing the support shaft to return to its previous state.

[0086] Those skilled in the art will understand that, based on the above description, various applications and modifications within the scope of this invention are possible.

[0087] (Explanation of reference numerals in the attached diagram)

[0088] 10: Pouch-shaped battery cell

[0089] 11: First electrode lead

[0090] 12: Second electrode lead

[0091] 110: First board

[0092] 120: First pad

[0093] 210: Second board

[0094] 220: Second pad

[0095] 300: First voltage measurement unit

[0096] 301: First side

[0097] 302: Second side

[0098] 310: First electrode lead guide

[0099] 311: First insertion part

[0100] 312: First extrusion contact part

[0101] 320: Support shaft

[0102] 330: Bearing

[0103] 331: First bearing

[0104] 332: Second bearing

[0105] 340: Spring

[0106] 400: Second voltage measurement unit

[0107] 410: Second electrode lead guide

[0108] 411: Second insertion part

[0109] 500: Charging and discharging devices

[0110] 510: Base components

[0111] 520: Extruded plate

[0112] 530: Support plate

[0113] 540: Clamping part

[0114] 550: Installation Department

Claims

1. A voltage measuring unit, comprising: The distance adjustment unit is composed of two support shafts connected in an X-shaped intersection. Bearings are connected to the ends of the two support shafts; A spring, configured to recover by elastic force even if the cross angle between the support shafts of the distance adjustment section increases; as well as An electrode lead guide is electrically connected to the electrode lead.

2. The voltage measuring unit according to claim 1, wherein, In the X-shaped distance adjustment section, the bearing includes two first bearings and two second bearings, the two first bearings being configured to contact a first plate, and the two second bearings being configured to contact a second plate.

3. The voltage measuring unit according to claim 1, wherein, The spring is connected to the ends of the first and second sides of the two support shafts, respectively.

4. The voltage measuring unit according to claim 1, wherein, The electrode lead guide includes an insertion portion into which the electrode leads of the pouch-shaped battery cell are inserted, and A compression contact is located in the insertion portion, and the compression contact is configured to be compressed by the electrode lead when the electrode lead is inserted into the insertion portion.

5. The voltage measuring unit according to claim 4, wherein, The outer side of the insertion portion is formed into an inclined shape that gradually widens towards the end.

6. A battery cell extrusion fixture, comprising: The first plate is located on the first side of the pouch-shaped battery cell; A first pad is attached to the outer surface of the first plate facing the pouch cell; The second plate is located on the second side of the pouch-shaped battery cell; The second pad is attached to the outer surface of the second plate facing the pouch cell; as well as A voltage measuring unit is located between the first plate and the second plate, and the voltage measuring unit is electrically connected to the electrode leads of the pouch cell when in contact with the electrode leads of the pouch cell.

7. The battery cell extrusion fixture according to claim 6, wherein, The first pad is added only to the portion of the outer surface of the first plate that contacts the pouch cell, and The second pad is added only to the portion of the outer surface of the second plate that is in contact with the pouch cell.

8. The battery cell extrusion fixture according to claim 6, wherein, The pouch-shaped battery cell includes a first electrode lead and a second electrode lead, and The voltage measurement unit includes a first voltage measurement unit and a second voltage measurement unit. The first voltage measurement unit is electrically connected to the first electrode lead when it is in contact with the first electrode lead, and the second voltage measurement unit is electrically connected to the second electrode lead when it is in contact with the second electrode lead.

9. A charging and discharging device, comprising a battery cell extrusion clamp according to any one of claims 6 to 8, wherein the charging and discharging device comprises: A base member configured to allow multiple battery cell extrusion clamps to be mounted onto the base member for side-by-side stacking; An extrusion plate, located on one side of the base member, is configured to extrude the plurality of battery cells into an extrusion clamp; A support plate, located on the opposite side of the base member, is configured to support the plurality of battery cell extrusion clamps being extruded by the extrusion plate; and A clamping part is connected to the extrusion plate.

10. The charging and discharging apparatus of claim 9, further comprising a mounting portion configured to allow the voltage measuring unit of the plurality of battery cell compression clamps to be movably mounted to the mounting portion.

11. The charging and discharging device according to claim 9, wherein, When the extrusion plate presses against the plurality of battery cell extrusion clamps, the first plate and the second plate approach each other, thereby stretching the spring of the voltage measuring unit and unfolding the support shaft of the distance adjustment unit.

12. The charging and discharging device according to claim 9, wherein, When the force applied by the extrusion plate to the plurality of battery cell extrusion clamps is released, the first plate and the second plate move apart from each other, thereby causing the spring of the voltage measuring unit to contract and the support shaft of the distance adjustment unit to move closer together.

13. The charging and discharging device according to claim 9, wherein, The insertion part of the voltage measuring unit into which the electrode leads are inserted is located at the midpoint between the first plate and the second plate.

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