Dummy assembly

Abstract

The object of this application is to provide a dummy assembly that can provide an environment for testing weld strength similar to that of an actual product, and that can minimize waste generated while testing weld strength. Furthermore, this application provides a dummy assembly that can flexibly respond to differences in the standards required for each product. A dummy assembly can be provided that includes a first body part fitted with a first busbar assembly including a first lead tab dummy and a first busbar provided to be welded to the first lead tab dummy at least in part, a second body part fitted with a second busbar assembly including a second lead tab dummy and a second busbar provided to be welded to the second lead tab dummy at least in part, and a distance adjustment part for adjusting the distance between the first body part and the second body part.

Description

Technical Field

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[0001] Mutual citation with related applications

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0153864, filed on November 8, 2023, and all the contents described in the corresponding Korean patent application are incorporated herein by reference.

[0003] Technical field

[0004] This application relates to a dummy assembly applicable in the field of batteries.

Background Art

[0005] In recent years, the demand for mobile devices such as smartphones, tablet PCs, and wireless earphones has been increasing. In addition, as the development of electric vehicles, energy storage batteries, robots, and satellites has become full-fledged, research on high-performance secondary batteries capable of repeated charging and discharging as an energy source has been actively promoted.

[0006] Currently, commercial secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium secondary batteries. Among these, lithium secondary batteries have the advantages of almost no memory effect compared to nickel-based secondary batteries, free charging and discharging, very low self-discharge rate, and high energy density.

[0007] On the other hand, in order to generate high-output electrical energy, a secondary battery includes a plurality of battery cells, and the plurality of battery cells can be electrically connected in series or in parallel. Here, the electrical connection of the battery cells can be made by welding the lead tabs of the battery cells and a busbar.

[0008] Since high-power electrical energy can be generated through the electrical connections of battery cells, it is important to evaluate whether there are any abnormalities in the welding between the lead tabs and busbars of the battery cells. To evaluate whether there are any abnormalities in the welding, a method can be used to inspect the welding strength between the lead tabs and busbars of the battery cells. Generally, the welding strength is inspected by measuring the tensile strength of the welded area between the lead tabs and busbars.

[0009] However, as mentioned above, after inspecting the weld strength, the battery cells and busbars are disposed of, resulting in a large amount of waste. To mitigate this problem, a dummy module was used to inspect the weld strength.

[0010] As the fields in which rechargeable batteries are applied gradually expanded, there were differences in the specifications required for these batteries in each field. To accommodate the specifications required for rechargeable batteries in each field, it was necessary to separately manufacture dummy modules that matched each standard. [Overview of the project] [Problems that the invention aims to solve]

[0011] This application provides a dummy assembly that can provide an environment for testing weld strength similar to that of an actual product, while minimizing the amount of waste generated during weld strength testing. Furthermore, this application provides a dummy assembly that can flexibly accommodate differences in the standards required for each product. [Means for solving the problem]

[0012] A dummy assembly according to one embodiment of this application may be used to test the weld strength between the lead tabs and busbars of a battery cell.

[0013] A dummy assembly according to one embodiment of this application may include a first body portion to which a first lead tab dummy and a first busbar assembly are mounted, the first body portion including a first busbar provided such that the first busbar assembly is welded to the first lead tab dummy in at least a portion of it; a second body portion to which a second lead tab dummy and a second busbar assembly are mounted, the second body portion including a second busbar provided such that the second busbar assembly is welded to the second lead tab dummy in at least a portion of it; and a distance adjustment portion for adjusting the distance between the first body portion and the second body portion.

[0014] In a dummy assembly according to one embodiment of this application, the distance adjustment unit may include a drive unit for moving the first body portion or the second body portion.

[0015] In a dummy assembly according to one embodiment of this application, the drive unit may include a first drive member connected to a first body portion, a second drive member connected to a second body portion, and a rotating member connected to the first drive member and the second drive member and provided to rotate.

[0016] In a dummy assembly according to one embodiment of this application, a rotating member is mutually fixed with a first drive member and a second drive member, the first drive member is fastened to a first body portion so as to be rotatable, and the second drive member can be fastened to a second body portion so as to be rotatable and translational.

[0017] In a dummy assembly according to one embodiment of this application, the first drive member and the second drive member may be composed of a single shaft.

[0018] In a dummy assembly according to one embodiment of this application, a protruding rib may be formed on the first drive member, and a screw may be formed on the second drive member.

[0019] In a dummy assembly according to one embodiment of this application, the first body portion includes a first body connecting member provided so as to face one side to which the first busbar assembly is mounted, and the second body portion includes a second body connecting member provided so as to face one side to which the second busbar assembly is mounted, and the first body connecting member and the second body connecting member can face each other.

[0020] In a dummy assembly according to one embodiment of this application, the distance adjustment unit may further include a guide unit that guides movement by the drive unit.

[0021] In a dummy assembly according to one embodiment of this application, the first body portion includes a first body connecting member provided so as to face one surface to which the first busbar assembly is mounted, the second body portion includes a second body connecting member provided so as to face one surface to which the second busbar assembly is mounted, and the distance adjustment portion may be connected to the first body connecting member and the second body connecting member.

[0022] In a dummy assembly according to one embodiment of this application, the distance adjustment unit includes a plurality of guide units, and the drive unit may be provided between the plurality of guide units.

[0023] In a dummy assembly according to one embodiment of the present application, the first body portion includes a first body hole into which a first lead tab dummy is mounted, and the second body portion may include a second body hole into which a second lead tab dummy is mounted.

[0024] In a dummy assembly according to an embodiment of the present application, the first body part includes a first body fixing part provided so that the first bus bar assembly can be mounted, the second body part includes a second body fixing part provided so that the second bus bar assembly can be mounted, the first bus bar assembly includes a first bus bar fixing part provided so as to be coupled to or detached from the first body fixing part, and the second bus bar assembly can include a second bus bar fixing part provided so as to be coupled to or detached from the second body fixing part.

[0025] In a dummy assembly according to an embodiment of the present application, the first bus bar assembly includes a first bus bar frame provided with a first bus bar fixing part on one side and supporting the first bus bar, the second bus bar assembly includes a second bus bar frame provided with a second bus bar fixing part on one side and supporting the second bus bar, the first bus bar frame includes a first groove guide part on at least one side, and the second bus bar frame can include a second groove guide part on at least one side.

[0026] The dummy assembly according to an embodiment of the present application further includes a position fixing part that maintains the distance between the first body part and the second body part, and the position fixing part can be combined with the first body part and the second body part while a fixing member penetrates therethrough.

[0027] In a dummy assembly according to an embodiment of the present application, the position fixing part includes a plurality of fixing holes that are body members and through holes provided in the body members, and a part of the plurality of fixing holes is a first fixing hole provided so as to be combined with the first body part, and the other part can be a second fixing hole provided so as to be combined with the second body part.

[0028] In a dummy assembly according to an embodiment of the present application, the first body part includes a first groove part provided at one end side, the second body part includes a second groove part provided at one end side and facing the first groove part, and the position fixing part can be seated in the first groove part and the second groove part.

[0029] In the dummy assembly according to an embodiment of the present application, the distance adjustment unit moves at least one of the first body part and the second body part, and at least one of the first groove part and the second groove part where the position fixing part is seated may include an extended space which is a space further extended in the direction in which the first body part or the second body part moves.

[0030] In the dummy assembly according to an embodiment of the present application, there are a plurality of fixing members, and some of the plurality of fixing members may be combined with a first coupling hole provided in the first groove part through a first fixing hole, and some of the others may be combined with a second coupling hole provided in the second groove part through a second fixing hole.

[0031] In the dummy assembly according to an embodiment of the present application, at least some of the plurality of fixing holes are buffer holes, and the buffer holes may include a buffer space provided so that a part of the fixing member penetrating the position fixing part and semi-coupled with the first body part or the second body part can move.

[0032] In the dummy assembly according to an embodiment of the present application, the distance adjustment unit moves at least one of the first body part and the second body part, and the buffer space may be provided so that a part of the semi-coupled fixing member can move in the direction in which the first body part or the second body part moves.

Effects of the Invention

[0033] The present application can provide an environment for inspecting the welding strength similar to that of an actual product and minimize the waste generated while inspecting the welding strength. Further, the present application may be able to respond flexibly to differences in the standards required for each product. Also, it can respond flexibly to equipment tolerances of multiple lines producing the same product, etc.

Brief Description of the Drawings

[0034] The figures shown in this application are illustrative, and the ratios of width, length, or thickness (or height) of each component are for illustrative purposes only and may differ from actual values. In the coordinate system shown in the drawings, the axes may be perpendicular to each other, the direction indicated by the arrow may be the positive direction, and the direction directly opposite to the direction indicated by the arrow (rotated 180 degrees) may be the negative direction.

[0035] [Figure 1] This figure illustrates at least a portion of a dummy assembly according to one embodiment of this application. [Figure 2] This is a perspective view showing at least a portion of a dummy assembly according to one embodiment of this application. [Figure 3] This is an exploded perspective view showing at least a portion of a dummy assembly according to one embodiment of this application. [Figure 4] This is an exploded perspective view showing at least a portion of a dummy assembly according to one embodiment of this application. [Figure 5] This is an exploded perspective view showing at least a portion of a dummy assembly according to one embodiment of this application. [Figure 6] This is a perspective view showing at least a portion of a dummy assembly according to one embodiment of this application. [Figure 7] This is an exploded perspective view showing at least a portion of a dummy assembly according to one embodiment of this application. [Figure 8] This is an enlarged view of a portion of a dummy assembly according to one embodiment of this application. [Figure 9] This is a plan view (XY plane) illustrating at least a portion of a position-fixing part according to one embodiment of this application. [Figure 10] This is an exploded view showing a dummy assembly according to one embodiment of this application, with the position fixing part disassembled. [Figure 11] This is an enlarged view of a portion of a dummy assembly according to one embodiment of this application. [Modes for carrying out the invention]

[0036] Prior to the detailed description of this application, terms and words used herein and in the claims may not be construed to be limited to their ordinary or dictionary meanings. Furthermore, inventors should interpret terms and concepts in a way that is consistent with the technical idea of ​​the invention, based on the principle that terms can be appropriately defined as concepts in order to best describe their invention. The embodiments described herein and configurations illustrated in the drawings are merely the most preferred embodiments of this application and may not represent all of the technical idea of ​​this application. Accordingly, there may be a variety of equivalents and variations that can be substituted for these at the time of filing of this application.

[0037] The same reference numerals or symbols in the drawings attached to this specification may indicate parts or components that perform substantially the same function. For the sake of explanation and understanding, different embodiments may also be described using the same reference numerals or symbols. That is, even if multiple drawings illustrate components with the same reference numerals, not all of the drawings may represent a single embodiment.

[0038] In the following description, singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as “contains” or “constitutes” are intended to specify the presence of features, figures, stages, operations, components, parts, or combinations thereof described in the specification, and should not be understood as preemptively excluding the possibility of the presence or addition of one or more different features, figures, stages, operations, components, parts, or combinations thereof.

[0039] Furthermore, in the following explanation, terms such as top, upper, lower, lower, side, front, and rear are used based on the direction shown in the drawing, and may be expressed differently if the direction of the object changes.

[0040] Furthermore, in this specification and the claims, terms including ordinal numbers, such as "first," "second," etc., may be used to distinguish between components. Such ordinal numbers are used to distinguish identical or similar components from one another, and the use of such ordinal numbers should not restrict the meaning of the terms. For example, the order of use or arrangement of components combined with such ordinal numbers should not be restricted by the numbers. If necessary, the ordinal numbers may be used alternately with each other.

[0041] The embodiments of this application will be described in detail below with reference to the attached drawings. However, the concept of this application is not limited to the embodiments presented. For example, a person skilled in the art who understands the concept of this application may propose other embodiments that fall within the scope of the concept of this application through additions, modifications, or deletions of components, and these too would fall within the scope of the concept of this application. In the drawings, the shape and size of elements, etc., may be exaggerated for clearer explanation.

[0042] In this specification, "battery" may be used interchangeably with "cell." Furthermore, "battery" or "cell" may be a general term referring to their units, namely battery cells, battery modules containing battery cells, or battery packs.

[0043] Figure 1 illustrates at least a portion of a dummy assembly 10 according to one embodiment of this application. Figure 2 is a perspective view illustrating at least a portion of a dummy assembly 10 according to one embodiment of this application. Figures 3 to 5 are exploded perspective views illustrating at least a portion of a dummy assembly 10 according to one embodiment of this application. Figure 6 is a perspective view illustrating at least a portion of a dummy assembly 10 according to one embodiment of this application. Figure 7 is an exploded perspective view illustrating at least a portion of a dummy assembly 10 according to one embodiment of this application.

[0044] This application provides a dummy assembly 10 that can provide an environment for testing weld strength similar to that of an actual product, and that can minimize the amount of waste generated while testing weld strength. Furthermore, this application provides a dummy assembly 10 that can accommodate differences in the standards required for each product.

[0045] A dummy assembly 10 according to one embodiment of this application may be used to test the welding strength between the lead tabs and busbars of a battery cell. Specifically, the dummy assembly 10 may be used to check for any abnormalities in the welding between the lead tabs and busbars of a battery cell. The dummy assembly 10 may be configured as a dummy form with a structure and size similar to the actual product to which it will be applied (e.g., a battery module).

[0046] Referring to Figure 1, a dummy assembly 10 according to one embodiment of the present application may include a body portion 100. The body portion 100 may also include a first body portion 110 and a second body portion 120. Each of the first body portion 110 and the second body portion 120 may be a housing configuration in which at least one side is open.

[0047] A dummy assembly 10 according to one embodiment of this application includes a first body portion 110 and a second body portion 120, the first body portion 110 and the second body portion 120 may be provided in a symmetrical structure.

[0048] Referring to Figures 2 to 7, in a dummy assembly 10 according to one embodiment of this application, a lead tab dummy and a busbar assembly 200 may be mounted on the body portion 100.

[0049] The body portion 100 may include body holes 113, 123 provided for inserting lead tab dummy. The body holes 113, 123 only need to be deep enough for the lead tab dummy to be inserted and properly secured, and may or may not be through-holes.

[0050] The body portion 100 may include body fixing portions 112 and 122 provided to which the busbar assembly 200 is attached. The body fixing portions 112 and 122 may be connected to busbar assembly fixing portions 213 and 223 provided on the busbar assembly 200, and this connection may fix the busbar assembly 200 to the body portion 100.

[0051] In a dummy assembly 10 according to one embodiment of this application, there may be one or more lead tab dummies. The number of lead tab dummies may be determined by the number of lead tabs of the battery cell in the designed product. In addition, the number of body holes 113, 123 of the body portion 100 may be the same as or greater than the predetermined number of lead tab dummies.

[0052] In the following, we will describe in detail the dummy assembly 10 according to one embodiment of this application, focusing on the first body portion 110 and the second body portion 120, respectively. While the following description will focus on the first body portion 110, all components of the second body portion 120 corresponding to each component of the first body portion 110 can be described by referring to the description of the first body portion 110.

[0053] Figures 2 to 5 are diagrams illustrating the components of the first body section 110, and Figures 6 and 7 are diagrams illustrating the components of the second body section 120. If only the ordinal number assigned to each component differs, the second body section 120 can refer to the description of the first body section 110.

[0054] Specifically, unless otherwise mentioned or contradicted in the following description, the first body portion 110 can be considered as the second body portion 120. The first body connecting member 111, the first body fixing portion 112, the first body hole 113, the first groove portion 114, and the first coupling hole 115 can be considered as the second body connecting member 121, the second body fixing portion 122, the second body hole 123, the second groove portion 124, and the second coupling hole 125, respectively. The first busbar assembly 210, the first busbar 211, the first busbar through hole 211h, the first busbar frame 212, the first groove guide portion 212h, and the first busbar assembly fixing portion 213 can be considered as the second busbar assembly 220, the second busbar 221, the second busbar through hole 221h, the second busbar frame 222, the second groove guide portion 222h, and the second busbar assembly fixing portion 223, respectively.

[0055] Referring to Figures 2 to 5, in a dummy assembly 10 according to one embodiment of the present application, a first body portion 110 may be fitted with a first lead tab dummy 510 and a first busbar assembly 210. The first body portion 110 may include a first body hole 113 into which the first lead tab dummy 510 is fitted. The first body hole 113 only needs to be deep enough for the first lead tab dummy 510 to be inserted and properly secured, and may or may not be a through hole. That is, the first body portion 110 may include a first body hole 113 into which at least a portion of the first lead tab dummy 510 is inserted.

[0056] Referring to Figure 1, in a dummy assembly 10 according to one embodiment of the present application, the first body portion 110 may include a first body connecting member 111 provided so as to face one surface to which the first busbar assembly 210 is mounted. The first body connecting member 111 can cover at least a portion of some of the open surfaces of the first body portion 110.

[0057] On the other hand, referring to Figure 1, the first body connecting member 111 and the second body connecting member 121 may face each other. That is, the first body part 110 and the second body part 120 may be provided in a symmetrical structure so that the first body connecting member 111 and the second body connecting member 121 face each other.

[0058] Referring to Figures 3 to 5, in a dummy assembly 10 according to one embodiment of the present application, the first body portion 110 may include a first body fixing portion 112 provided on which the first busbar assembly 210 is mounted. The first body fixing portion 112 may be connected to a first busbar assembly fixing portion 213 provided on the first busbar assembly 210, and this connection may fix the first busbar assembly 210 to the first body portion 110. The first body fixing portion 112 may also be provided on at least one side of the first body portion 110.

[0059] In another example, in a dummy assembly 10 according to one embodiment of this application, the first body fixing portion 112 may be provided on only one side of the first body portion 110. Furthermore, the first body fixing portion 112 may be provided, for example, at a higher position than the first body hole 113. In this specification, a higher position may mean being located more in the positive direction relative to the z-axis coordinate, where the z-axis coordinate may be in the negative direction due to gravity. If the first body fixing portion 112 is provided on only one side of the first body portion 110 and at a higher position than the first body hole 113, the first body fixing portion 112 and the first busbar assembly fixing portion 213 can be more easily coupled or uncoupled.

[0060] The first busbar assembly 210 may have a first busbar assembly fixing portion 213 on one side. The first busbar assembly 210 may also include a first busbar assembly fixing portion 213 that is configured to be coupled to or uncoupled from the first body fixing portion 112.

[0061] The first body fixing part 112 may have a latch configuration, and the first busbar assembly fixing part 213 may have a rod configuration that can be combined with the latch configuration. When the first body fixing part 112 and the first busbar assembly fixing part 213 are combined, the combination can be released by an external force separating the rod configuration of the first busbar assembly fixing part 213 from the latch configuration of the first body fixing part 112. That is, the first busbar assembly 210 can be coupled to or uncoupled from the first body part 110 in this manner. However, various methods can be applied to couple the first body fixing part 112 and the first busbar assembly fixing part 213, and are not limited to the method described above.

[0062] On the other hand, when the first busbar assembly 210 is combined with the first body part 110, the first lead tab dummy 510, which is mounted in the first body hole 113, can be welded to the first busbar 211 provided in the first busbar assembly 210. By providing the first lead tab dummy 510, which is mounted in the first body hole 113 of the first body part 110, in a manner that allows it to be welded to the first busbar 211, the welding strength corresponding to the actual product can be inspected. Once the welding of the first lead tab dummy 510 and the first busbar 211 is completed, the combination of the first body part 110 and the first busbar assembly 210 can be released, and as this combination is released, the first lead tab dummy 510 mounted in the first body hole 113 can be released from the first body hole 113. In other words, the first busbar assembly 210, to which the first lead tab dummy 510 is welded to the first busbar 211, can be separated from the first body portion 110, and the weld strength can be inspected through the separated first busbar assembly 210.

[0063] As described above, the first busbar assembly 210 may include a first busbar 211 provided to be welded to the first lead tab dummy 510 in at least part of its length. The first busbar 211 may be one or more. The first busbar 211 may also include a first busbar through-hole 211h provided through which the first lead tab dummy 510 passes, or, in another example, may not include the first busbar through-hole 211h. If there are multiple first busbars 211, at least some may include the first busbar through-hole 211h, and at least other may not include the first busbar through-hole 211h. Also, if there are multiple first busbars 211, at least some may be connected to one another, but they may not be connected. The first lead tab dummy 510 can pass through the first bus bar through hole 211h of the first bus bar 211, pass between one first bus bar 211 and another first bus bar 211, or pass through the side region of one first bus bar 211. The first bus bars 211 are not particularly limited, and only need to be arranged in an appropriate number so that the first lead tab dummy 510 can be welded. On the other hand, each of the first lead tab dummy 510 and the first bus bar 211 can include a metallic material. For example, the metallic material may be aluminum, copper, or steel. Also, the first lead tab dummy 510 and the second lead tab dummy 520 can include different metallic materials from each other. For example, the first lead tab dummy 510 may include aluminum, and the second lead tab dummy 520 may include copper.

[0064] The first busbar assembly 210 may include a first busbar frame 212 that supports the first busbar 211. The first busbar frame 212 may support the first busbar 211 through support means. For example, the first busbar frame 212 may have a protruding structure corresponding to the area in which the first busbar 211 is supported, and the first busbar 211 may include a support through-hole provided so as to fit into the protruding structure provided on the first busbar frame 212, and the support through-hole of the first busbar 211 may fit into the protruding structure of the first busbar frame 212. The support means are not limited to those described above and may be provided in other ways.

[0065] The first busbar frame 212 may include a first busbar frame through-hole through which a first lead tab dummy 510 passes. The first busbar frame through-hole in the first busbar frame 212 may be positioned to correspond to a first body hole 113 in the first body portion 110. That is, all first lead tab dummies 510 mounted in the first body hole 113 can pass through the first busbar frame 212 through the first busbar frame through-hole. The first lead tab dummy 510 that has passed through the first busbar frame 212 may come into contact with and be welded to the first busbar 211 supported by the first busbar frame 212. At least a portion of the first lead tab dummy 510 that has passed through the first busbar frame 212 may be bent so as to be welded to the first busbar 211.

[0066] Referring to Figure 2, the first busbar frame 212 may include a first groove guide portion 212h on at least one side. There may be one or more first groove guide portions 212h. Welding of the first lead tab dummy 510 and the first busbar 211 may be performed by a welding apparatus. In order to weld between the first lead tab dummy 510 and the first busbar 211, the welding apparatus approaches the direction in which the first body portion 110 is located, facing one side of the first body portion 110 to which the first busbar assembly 210 is mounted. Here, the welding apparatus may partially contact the first groove guide portion 212h provided on the first busbar frame 212. When the welding apparatus contacts the first groove guide portion 212h, the welding apparatus can be positioned more accurately at the location where welding is to be performed, and problems such as deterioration of welding quality due to vibration during welding can be prevented.

[0067] On the other hand, referring to Figure 3, the first busbar assembly 210 can be mounted on the first body portion 110. Specifically, the first busbar frame 212 of the first busbar assembly 210 can be fixed to the first body fixing portion 112 provided on the first body portion 110. The first busbar 211 can also be supported by the first busbar frame 212 through support means. The first lead tab dummy 510 can be mounted in the first body hole 113 on the first body portion 110 to which the first busbar assembly 210 is mounted. The first lead tab dummy 510 mounted in the first body hole 113 can be welded to the first busbar 211.

[0068] Furthermore, referring to Figures 3 to 5, a first lead tab dummy 510 is mounted in the first body hole 113 of the first body portion 110, and the first lead tab dummy 510 mounted in the first body hole 113 can penetrate the first busbar frame 212. The first lead tab dummy 510 that has penetrated the first busbar frame 212 can be welded to the first busbar 211 supported by the first busbar frame 212.

[0069] Figure 8 is an enlarged view of a portion of a dummy assembly 10 according to one embodiment of the present application. Referring to Figures 1 and 8, the dummy assembly 10 according to one example of the present application may include a distance adjustment unit 300 for adjusting the distance between the first body portion 110 and the second body portion 120.

[0070] The distance adjustment unit 300 may include a drive unit 310 for moving the first body portion 110 or the second body portion 120. The drive unit 310 can narrow or widen the distance between the first body portion 110 and the second body portion 120.

[0071] The method by which the drive unit 310 adjusts the distance between the first body portion 110 and the second body portion 120 may be a screw rotation method.

[0072] The screw-rotating drive unit 310 may consist of a first drive member 311, a second drive member 312, and a rotating member 313.

[0073] The rotating member 313 refers to the object that the operator directly grips and adjusts. The rotating member 313 can be fixed to the first drive member 311 and the second drive member 312, respectively. In this case, "fixed" means fixing the relative position and direction, and ultimately it can have the meaning of being an integrated unit.

[0074] The first drive member 311 is rotatably fastened to the first body connecting member 111 of the first body portion 110, and the second drive member 312 may be fastened to the second body connecting member 121 of the second body portion 120 so as to be able to rotate and translate. That is, the first body connecting member 111 and the first drive member 311 rotate relative to each other but are fixed with respect to the x-axis direction, and the second body connecting member 121 and the second drive member 312 may rotate relative to each other and also be able to move relative to each other with respect to the x-axis direction. The second body connecting member 121 and the second drive member 312 are obtained by a combination of screws. On the other hand, the first body connecting member 111 and the first drive member 311 may be configured with a ring-shaped protruding rib provided on one side and a recessed form provided on the other side corresponding to the protruding rib structure.

[0075] Alternatively, the first drive member 311 may be fixed to the first body connecting member 111 of the first body portion 110, and the second drive member 312 may be fixed to the second body connecting member 121 of the second body portion 120, thereby realizing the same behavior through the relative motion (e.g., rotational motion) of the rotating member 313 and the first drive member 311, and the relative motion (e.g., rotational and translational motion) of the rotating member 313 and the second drive member 312.

[0076] Each of the first drive member 311 and the second drive member 312 may be shaft-shaped, and in particular, the two components may be formed on a single axis. The shaft shape of the two components 311 and 312 allows for stable fastening to the first body portion 110 and the second body portion 120, and also enables intuitive force transmission.

[0077] However, this represents only one configuration, and the fastening of the two body sections 110, 120 and the drive unit 310 may be configured in other ways. For example, the drive unit 310 and the two body sections 110, 120 may be combined and operate through a gear system or through a hydraulic cylinder system.

[0078] The distance adjustment between the first body section 110 and the second body section 120 allows for adaptation to differences in standards required for multiple products.

[0079] Referring to Figures 1 and 8, in a dummy assembly 10 according to one embodiment of the present application, the distance adjustment unit 300 may include a guide unit 320 that guides stable behavior between the first body unit 110 and the second body unit 120 when moved by the drive unit 310. The guide unit 320 may also be connected to at least one of the first body connecting member 111 and the second body connecting member 121. From the viewpoint of more accurately guiding the movement by the drive unit 310, the guide unit 320 may also be connected to both the first body connecting member 111 and the second body connecting member 121.

[0080] The guide portion 320 may be positioned so as not to interfere with the operation of the drive unit 310. Furthermore, at least one of the first body connecting member 111 and the second body connecting member 121 may include a through-hole through which the guide portion 320 can pass. The guide portion 320 may pass through the through-hole provided in at least one of the first body connecting member 111 and the second body connecting member 121. To avoid interfering with the movement by the drive unit 310, the guide portion 320 may be provided in such a manner that it is not fixed and combined with at least one of the first body connecting member 111 and the second body connecting member 121, nor is it separated from the through-hole.

[0081] The distance adjustment unit 300 may include a plurality of guide units 320. Furthermore, the drive unit 310 of the distance adjustment unit 300 may be provided between the plurality of guide units 320. By providing multiple guide units 320, smoother movement guidance can be achieved, and by positioning the drive unit 310 between the guide units 320, more stable movement guidance can be provided.

[0082] Figure 9 is a plan view (XY plane) showing at least a part of the position fixing part 400 according to one embodiment of this application. Figure 10 is an exploded view showing the position fixing part 400 disassembled in the dummy assembly 10 according to one embodiment of this application. Figure 11 is an enlarged view of a part of the dummy assembly 10 according to one embodiment of this application.

[0083] Referring to Figures 9 to 11, a dummy assembly 10 according to one embodiment of the present application may include a position-fixing unit 400 that maintains the distance between the first body portion 110 and the second body portion 120. The position-fixing unit 400 can fix the positions of the first body portion 110 and the second body portion 120 so that they do not move further, so that the distance between them is controlled to a desired extent through a distance adjustment unit 300 and the controlled distance is fixed. Referring to Figure 1, there may be multiple position-fixing units 400, and the first body portion 110 and the second body portion 120 can be more firmly fixed by multiple position-fixing units 400. On the other hand, when the position-fixing units 400 are combined with the first body portion 110 and the second body portion 120, the distance adjustment unit 300 may not be able to adjust the distance between the first body portion 110 and the second body portion 120 any further.

[0084] In a dummy assembly 10 according to one embodiment of this application, the position fixing portion 400 can be combined with the first body portion 110 and the second body portion 120 while a fixing member 600 passes through it. The fixing member 600 is not particularly limited as long as it can combine the position fixing portion 400 with the first body portion 110 and the second body portion 120, and may be, for example, a bolt / nut, screw, or rivet. The number of fixing members 600 may be determined by considering the number of fixing holes 420, which are through holes provided in the position fixing portion 400, and for example, there may be multiple fixing members 600.

[0085] Referring to Figure 9, the position fixing portion 400 can include a body member 410 and a plurality of fixing holes 420 which are through holes provided in the body member 410. The fixing member 600 can pass through the position fixing portion 400 while passing through the fixing holes 420 which are through holes. In the position fixing portion 400, some of the plurality of fixing holes 420 may be first fixing holes 421 provided to be combined with the first body portion 110, and the other portion may be second fixing holes 422 provided to be combined with the second body portion 120. There are a total of four fixing holes 420, of which two are first fixing holes 421 provided to be combined with the first body portion 110, and the remaining two may be second fixing holes 422 provided to be combined with the second body portion 120. In addition, there may be one or more first fixing holes 421 and one or more second fixing holes 422. Furthermore, if there are multiple first fixing holes 421 and one second fixing hole 422, the second fixing holes 422 may not be located between the first fixing holes 421. Also, if there is one first fixing hole 421 and multiple second fixing holes 422, the first fixing holes 421 may not be located between the second fixing holes 422. Furthermore, if there are multiple first fixing holes 421 and multiple second fixing holes 422, the first fixing holes 421 may not be located between the second fixing holes 422, and the second fixing holes 422 may not be located between the first fixing holes 421. In other words, the first fixing holes 421 and the second fixing holes 422 may be provided spatially separated from each other. Also, the first fixing holes 421 and the second fixing holes 422 may be large enough for the fixing member 600 to pass through.

[0086] Referring to Figure 10, in a dummy assembly 10 according to one embodiment of the present application, the first body portion 110 may include a first groove portion 114 provided at one end. The second body portion 120 may also include a second groove portion 124 provided at one end. Here, the first groove portion 114 and the second groove portion 124 can face each other. Furthermore, the first groove portion 114 and the second groove portion 124 can form a space in which the position fixing portion 400 can be fixed to the first body portion 110 and the second body portion 120. The position fixing portion 400 can be fixed to the first groove portion 114 and the second groove portion 124.

[0087] Referring to Figure 10, in a dummy assembly 10 according to one embodiment of this application, some of the plurality of fixing members 600 can pass through the first fixing hole 421, and the fixing members 600 that have passed through the first fixing hole 421 can be combined with the first coupling hole 115 provided in the first groove 114. That is, the first groove 114 may be provided with the first coupling hole 115 so that the fixing members 600 that have passed through the first fixing hole 421 can be combined with it. In addition, some of the plurality of fixing members 600 can pass through the second fixing hole 422, and the fixing members 600 that have passed through the second fixing hole 422 can be combined with the second coupling hole 125 provided in the second groove 124. That is, the second groove 124 may be provided with the second coupling hole 125 so that the fixing members 600 that have passed through the second fixing hole 422 can be combined with it.

[0088] Referring to Figure 11, at least one of the first groove 114 and the second groove 124 to which the position fixing part 400 is attached may include an extension space E, which is a space further extended in the direction in which the first body part 110 or the second body part 120 moves. The distance between the first body part 110 and the second body part 120 can be adjusted by the distance adjustment part 300, thereby accommodating differences in standards required for multiple products, but providing an extension space E may make it easier to accommodate differences in standards.

[0089] On the other hand, in a dummy assembly 10 according to one embodiment of this application, at least some of the plurality of fixing holes 420 may be buffer holes 423. The buffer holes 423 may include buffer spaces 423s provided so that a part of the fixing member 600, which is semi-connected to the first body portion 110 or the second body portion 120 and penetrates the position fixing portion 400, can move. Specifically, the buffer holes 423 may include buffer spaces 423s provided so that a part of the fixing member 600, which is semi-connected to the first connecting hole 115 or the second connecting hole 125, can move.

[0090] After adjusting the distance between the first body portion 110 and the second body portion 120 through the distance adjustment section 300, the position fixing section 400 can be fixed using the fixing members 600 to fix their positions. Here, the fixing members 600 that have passed through the fixing holes 420 of the position fixing section 400 are combined with the first coupling hole 115 or the second coupling hole 125, respectively, although they may not be fully combined. In this state, the buffer hole 423 provides a buffer space 423s, which is a margin of error, allowing the not-fully-combined fixing members 600 to move, and the fixing members 600 can be fine-tuned so that the position fixing section 400 can be more precisely secured and fixed. Once the fine-tuning of the fixing members 600 is complete, the fixing members 600 can be fully combined with the first coupling hole 115 or the second coupling hole 125 to prevent movement. Here, "fully assembled" can mean that the fixing member 600 has begun to assemble with the first coupling hole 115 or the second coupling hole 125, and the fixing member 600 can no longer move.

[0091] The buffer space 423s may be provided so that a portion of the semi-connected fixing member 600 can move in the direction in which the first body portion 110 or the second body portion 120 moves. As described above, the first body portion 110 or the second body portion 120 can move through the distance adjustment portion 300, and the buffer space 423s may be provided so that a portion of the semi-connected fixing member 600 that penetrates the buffer hole 423 can move in the direction in which the first body portion 110 or the second body portion 120 moves. The direction in which the distance adjustment portion 300 moves the first body portion 110 or the second body portion 120 can be predetermined, and the buffer space 423s may be provided taking this into consideration.

[0092] On the other hand, at least a portion of the first fixed holes 421 may be buffer holes 423, and at least a portion of the second fixed holes 422 may be buffer holes 423. As a specific example, referring to Figures 9 to 11, all of the second fixed holes 422 may be buffer holes 423.

[0093] A dummy assembly 10 according to one embodiment of this application can be widely applied to electric vehicles, battery charging stations, and other green technology fields such as solar and wind power generation that use batteries. Furthermore, a dummy assembly 10 according to one embodiment of this application can be applied to eco-friendly electric vehicles or hybrid vehicles that suppress air pollution and greenhouse gas emissions and prevent climate change.

[0094] Although various embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and it will be obvious to anyone with average knowledge of the art that various modifications and variations are possible as long as they do not deviate from the technical idea of ​​the present invention as described in the claims. Furthermore, some components of the above-described embodiments may be omitted, and each embodiment may be combined with others. [Explanation of Symbols]

[0095] 10: Dummy Assembly 100: Body part 110: First body section 111: First body connecting member 112: First body fixing part 113: First body hole 114: First trench section 115: First Joint Hall 120: Second Body Section 121: Second body connecting member 122: Second body fixing part 123: Second body hole 124: Second trench section 125: Second Joint Hall 200: Busbar Assembly 210: First busbar assembly 211: First bus bar 211h: First busbar through hole 212: First busbar frame 212h: 1st groove guide part 213: First busbar assembly fixing part 221: Second bus bar 221h: Second busbar through hole 222: Second busbar frame 223: Second busbar assembly fixing part 222h: Second groove guide section 300: Distance adjustment section 310: Drive unit 311: First drive member 312: Second drive member 313: Rotating member 320: Guide Section 400: Position fixing part 410: Body components 420: Fixed hole 421: First Fixed Hall 422: Second Fixed Hall 423: Buffer hole 423s:Buffer space 510: First lead tab dummy 520: Second lead tab dummy 600: Fixing member E: Extension space

Claims

1. In a dummy assembly for testing the weld strength between the lead tabs and busbars of a battery cell, A first body portion to which a first lead tab dummy and a first busbar assembly are mounted, wherein the first busbar assembly includes a first busbar provided to be welded to the first lead tab dummy in at least a portion thereof, A second body portion to which a second lead tab dummy and a second busbar assembly are mounted, wherein the second busbar assembly includes a second busbar provided to be welded to the second lead tab dummy in at least a portion thereof, A dummy assembly including a distance adjustment unit for adjusting the distance between the first body portion and the second body portion.

2. The dummy assembly according to claim 1, wherein the distance adjustment unit includes a drive unit for moving the first body unit or the second body unit.

3. The aforementioned drive unit is A first drive member connected to the first body portion, A second drive member connected to the second body portion, The dummy assembly according to claim 2, comprising a rotating member connected to the first drive member and the second drive member and provided to rotate.

4. The rotating member is mutually fixed to the first drive member and the second drive member. The first drive member is fastened to the first body portion so as to be rotatable, The dummy assembly according to claim 3, wherein the second drive member is fastened to the second body portion so as to be able to rotate and translate.

5. The dummy assembly according to claim 4, wherein the first drive member and the second drive member are composed of a single shaft.

6. The dummy assembly according to claim 4, wherein a protruding rib is formed on the first drive member and a screw is formed on the second drive member.

7. The first body portion includes a first body connecting member provided so as to face the surface on which the first busbar assembly is mounted, and the second body portion includes a second body connecting member provided so as to face the surface on which the second busbar assembly is mounted. The dummy assembly according to claim 3, wherein the first body connecting member and the second body connecting member face each other.

8. The dummy assembly according to claim 2, wherein the distance adjustment unit further includes a guide unit that guides the movement by the drive unit.

9. The first body portion includes a first body connecting member provided so as to face the surface on which the first busbar assembly is mounted, and the second body portion includes a second body connecting member provided so as to face the surface on which the second busbar assembly is mounted. The dummy assembly according to claim 8, wherein the distance adjustment unit is connected to the first body connecting member and the second body connecting member.

10. The distance adjustment unit includes a plurality of guide units, The dummy assembly according to claim 9, wherein the drive unit is provided between the plurality of guide units.

11. The dummy assembly according to any one of claims 1 to 10, wherein the first body portion includes a first body hole provided for mounting the first lead tab dummy, and the second body portion includes a second body hole provided for mounting the second lead tab dummy.

12. The first body portion includes a first body fixing portion provided for mounting the first busbar assembly, and the second body portion includes a second body fixing portion provided for mounting the second busbar assembly. The dummy assembly according to any one of claims 1 to 10, wherein the first busbar assembly includes a first busbar assembly fixing portion provided to be coupled to or uncoupled from the first body fixing portion, and the second busbar assembly includes a second busbar assembly fixing portion provided to be coupled to or uncoupled from the second body fixing portion.

13. The first busbar assembly includes a first busbar frame that supports the first busbar and has a first busbar assembly fixing portion on one side. The second busbar assembly includes a second busbar frame that supports the second busbar and has a second busbar assembly fixing portion on one side. The dummy assembly according to claim 12, wherein the first busbar frame includes a first groove guide portion on at least one side, and the second busbar frame includes a second groove guide portion on at least one side.

14. The system further includes a position fixing part that maintains the distance between the first body part and the second body part, The dummy assembly according to any one of claims 1 to 10, wherein the position fixing portion is combined with the first body portion and the second body portion while a fixing member is passed through it.

15. The position fixing portion includes a body member and a plurality of fixing holes which are through holes provided in the body member. The dummy assembly according to claim 14, wherein some of the plurality of fixing holes are first fixing holes provided to be combined with the first body portion, and the other portion are second fixing holes provided to be combined with the second body portion.

16. The first body portion includes a first groove provided at one end, and the second body portion includes a second groove provided at one end and facing the first groove. The dummy assembly according to claim 15, wherein the position fixing portion is fixed to the first groove and the second groove.

17. The distance adjustment unit moves at least one of the first body portion and the second body portion, The dummy assembly according to claim 16, wherein at least one of the first groove and the second groove to which the position fixing portion is secured includes an extension space which is a space that extends further in the direction in which the first body portion or the second body portion moves.

18. The aforementioned fixing member is a plurality of members, The dummy assembly according to claim 16, wherein some of the plurality of fixing members are combined with a first connecting hole provided in the first groove that penetrates the first fixing hole, and other parts are combined with a second connecting hole provided in the second groove that penetrates the second fixing hole.

19. At least some of the aforementioned multiple fixing holes are buffer holes, The dummy assembly according to claim 15, wherein the buffer hole includes a buffer space provided so that a part of the fixing member, which penetrates the position fixing portion and is semi-connected to the first body portion or the second body portion, can move.

20. The distance adjustment unit moves at least one of the first body portion and the second body portion, The dummy assembly according to claim 19, wherein the buffer space is provided such that a part of the semi-connected fixing member can move in the direction in which the first body portion or the second body portion moves.

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