Arrangement for making a diffusion welded connection between an electrically conductive contact element and a workpiece

Abstract

The invention relates to an arrangement (1) for producing a diffusion welded connection (59) between an electrically conductive contact element (19) and a workpiece (9). In order to reduce the number of work steps and to obtain a secure connection, the arrangement (1) comprises a protective chamber (3), in which a workpiece position (7) for arranging at least a portion of the workpiece (9) is located, and an acceleration device (17), which is configured to shoot the contact element (19) into the workpiece (9 arranged at the workpiece position (7)).

Description

Technical Field

[0001] This invention relates to an arrangement for manufacturing a diffusion welded connection between a conductive contact element and a workpiece. The invention also relates to a projectile for manufacturing a diffusion welded connection, and a sheet metal composite comprising a sheet stack and at least one contact element that electrically and mechanically connects at least one subset of the sheets to each other. Background Technology

[0002] In many applications, it is necessary to insert contact elements into workpieces. The workpiece can in particular be a stack of plates. Individual plates or other individual rigid bodies can also serve as workpieces. In the case of a stack of plates, the contact element inserted into the stack can mechanically and electrically connect several plates of the stack. An example of a specific application is, for example, the module connector of a battery module in an electric vehicle, which is at least partially formed as plates. Aluminum is often used as the material here. Several methods are typically required to connect the plates to each other mechanically and electrically. In this case, an opening extending through all the metal plates is first created, then the contact element is pressed or screwed into the opening, and finally a brazing or welding connection is formed between the contact element and the metal plates. When performing such a brazing or welding connection, the contact element and / or the stack of plates must be at least partially heated. Furthermore, solder is usually required. This can also be the case if a single plate or other rigid body is machined as a workpiece.

[0003] There is also a problem with materials such as aluminum, where an oxide layer forms on the sheet's surface when the sheet comes into contact with oxygen. In the process steps described above, for example, an oxide layer is formed on the inner wall of the opening during or after the creation of the opening for the contact element, before the contact element can be inserted. This oxide layer subsequently weakens or prevents the electrical connection between the contact element and the sheets of the sheet stack.

[0004] Therefore, the object of the present invention is to provide an arrangement structure and method of the above type, which facilitates the generation of diffusion welded connections between conductive contact elements and workpieces, particularly between the metal sheets of a metal sheet stack, and reduces or completely prevents the risk of the formation of an electrically insulating oxide layer between the contact elements and workpieces. Summary of the Invention

[0005] The problem is solved by the arrangement structure mentioned in the introduction, which includes a protective chamber and an acceleration device, wherein the workpiece position is located in the protective chamber for arranging at least a portion of the workpiece, and the acceleration device is configured to inject a contact element into the workpiece arranged at the workpiece position. The problem is solved by the method mentioned in the introduction, whereby the contact element is injected into the workpiece, particularly within the protective chamber, and mechanically and electrically connected to the workpiece by injection, particularly to the sheets in the sheet stack.

[0006] Injecting a contact element into a workpiece has several advantages. First, when the contact element impacts the workpiece, its kinetic energy can be converted into heat energy. This heat energy can then be used to create a diffusion weld joint between the contact element and the workpiece. Therefore, a diffusion weld joint is automatically generated as a result of the insertion. Consequently, the subsequent process of creating a diffusion weld joint by heating the workpiece with the inserted contact element can be eliminated. Welding can also be omitted.

[0007] Another advantage of the solution according to the invention is that the outer surface portion of the workpiece can be removed by impact from the contact element. This means that the oxide layer can be removed by impact from the contact element itself. Because the contact element is immediately positioned in these areas after impact, the reformation of the oxide layer can be prevented. The resulting diffusion weld joint can create a permanent conductive connection, in which the materials of the contact element and the workpiece diffuse into each other, at least in the boundary region. A mechanical connection is also established by leaving the contact element in the workpiece.

[0008] On the one hand, the protective chamber of the arrangement structure according to the present invention can be used to enclose the fragments, vapors or gases generated when the contact element impacts the workpiece and prevent them from spreading in an uncontrolled manner.

[0009] Furthermore, a protective chamber is also preferred to further reduce the risk of oxide layer formation on the workpiece or contact element. For this purpose, the protective chamber can be evacuated or filled with a protective gas. In the simplest case, a negative pressure or vacuum is created, ensuring that there is insufficient oxygen in the protective chamber to cause oxide layer formation.

[0010] The solution according to the invention can be further improved through various configurations, each of which is preferred and can be combined as needed. These configurations and their associated advantages are described below. In this context, these configurations can be applied both to the arrangement structure according to the invention and to the method according to the invention.

[0011] In the following description, the invention will always refer to examples of stacked sheet bodies as workpieces. However, the invention is not limited thereto. Any other workpiece is possible, particularly individual sheets, plates, or other rigid bodies. Therefore, the configurations described below and their associated advantages can also be applied to other types of workpieces.

[0012] Preferably, the sheet stack is arranged at the workpiece location such that the contact element is accelerated and injected into the sheet stack perpendicular to the plane formed by the sheets. Therefore, the ejection direction of the contact element extends transversely to the plane of the metal sheets. This allows the contact element to reach all or at least a subset of the sheets in the stack to be joined along a shorter path.

[0013] The term "sheet stack" refers to a plurality of sheets stacked together. Preferably, two adjacent sheets are in direct contact with each other.

[0014] This arrangement may include at least one projectile, wherein a contact element forms at least one sub-part of the projectile. In the simplest case, the contact element itself is the projectile.

[0015] Alternatively, a projectile is preferably used as a composite of a contact element and another part, wherein the other part, particularly the central body of the projectile, serves as the base of the contact element. In this way, the contact element can be formed according to the characteristics required for connection to the sheet. On the other hand, the remaining projectile can be optimized so that it can be sufficiently accelerated by an accelerating device. The contact element is preferably made at least partially of copper or a mixture of copper-based materials.

[0016] Preferably, the portion of the projectile without the contact element can be separated from the contact element during or after the entry plate stack. Particularly preferred is that the projectile without the contact element can be reused. That is, it can be provided with a new contact element and fired again.

[0017] The projectile may have a central body on which the contact element is arranged as a sleeve. Therefore, the central body at least partially penetrates the sleeve. Thus, the central body and the contact element form a composite that constitutes the projectile.

[0018] For example, the central body can be formed of ferrite or steel. If the projectile will be accelerated electromagnetically, for example by a gauss gun, then such a material, especially a ferromagnetic material, may be preferred.

[0019] Preferably, the projectile is substantially cylindrical. It can be a hollow cylinder or a solid cylinder, preferably a solid cylinder. Therefore, the composite of the contact element and the remaining projectile can consist of a solid cylindrical central body (especially a bolt) and a hollow cylindrical contact element.

[0020] As an alternative to cylindrical and associated circular cross-sections, the contact element and / or projectile can have different cross-sections. For example, the projectile and / or contact element alone can be provided with an elliptical or polygonal cross-section.

[0021] Furthermore, the center body may have a shoulder at one end, preferably at the end pointing in the ejection direction, which increases the cross-section of the center body. The sleeve-shaped contact element cannot pass through this shoulder and is therefore reliably held on the center body. In this case, no additional press-fit is required between the contact element and the center body.

[0022] Preferably, these two elements are formed such that the contact element can slide onto the central body. Another alternative construction of the projectile could be a projectile consisting of continuous sections, one after another along the firing direction. For example, the contact element could thus form a rear portion. In this way, the projectile can penetrate the sheet stack with the portion in front of the contact element, creating an opening. The contact element then follows into the sheet stack as the rear portion of the composite.

[0023] According to a preferred configuration, the projectile includes a central body having a cutting portion and a supporting portion, the cutting portion being configured to cut at least a portion of the pieces of the release plate stack, and the supporting portion being configured to support a contact element. In other words, the cutting portion, as part of the central body, can fly forward. The contact element can be arranged behind the cutting portion. In this case, it can be specifically arranged as a sleeve on the central body, wherein the cutting portion protrudes from the contact element on the front side of the projectile.

[0024] Preferably, the diffusion weld joint is generated solely by the heat energy converted from the kinetic energy of the contact element and / or the projectile upon impact with the stack of sheets. However, if this energy is insufficient, the arrangement may further include at least one heating element, particularly a heating element with an induction coil, configured to heat the contact element and / or the projectile before or during acceleration by the acceleration device. For example, the contact element may be heated to a temperature between 400°C and 600°C.

[0025] The protective chamber is preferably configured to generate a negative pressure compared to the normal pressure outside the protective chamber. This can prevent or delay the formation of an oxide layer. In other words, the protective chamber can be a vacuum chamber. Alternatively, the protective chamber can also be filled with a protective gas.

[0026] To further improve the connection between the sheets in the sheet stack and with the contact elements, the arrangement may also include a drilling device configured to create holes that extend continuously through the sheets of the sheet stack to be joined. Preferably, the holes extend perpendicular to the plane of the sheets, and therefore parallel to the ejection direction. The contact elements can then be ejected into the previously created holes.

[0027] Preferably, the accelerating device is configured to eject the contact element at a speed greater than 200 m / s, preferably greater than 300 m / s. In some cases, speeds exceeding 600 m / s may also be required. The preferred speed range is between 300 and 600 m / s, which also includes the speed of sound at 20°C.

[0028] Acceleration devices may include railguns or gauss guns.

[0029] A railgun has a current-carrying bracket that connects two electrical wires, i.e., the rails. When current flows through the wires and the bracket, the bracket is accelerated by the Lorentz force due to the interaction between the magnetic field generated in the wires and the current in the bracket. The bracket can support and accelerate the contact element or projectile. At the end of the acceleration path, the contact element or projectile can detach from the bracket and fly towards the workpiece position.

[0030] In a Gauss gun (also known as a coil gun), the contact element and / or the projectile can be magnetically accelerated by one or more coils arranged in series. This principle is similar to that of a linear motor.

[0031] One of the aforementioned electromagnetic acceleration devices is preferred because the acceleration of the contact element can be easily controlled based on the current intensity. Furthermore, these types of acceleration devices are generally reusable.

[0032] The arrangement can also include a magazine for receiving multiple contact elements or projectiles, which is connected to an acceleration device. Therefore, contact elements can be rapidly and continuously supplied to the acceleration device and accelerated. After the impact of the contact elements, workpieces can be changed, or workpieces positioned at their locations can be moved. Thus, several contact elements can be fired one after another into the same or different workpieces.

[0033] As an alternative to electromagnetic acceleration of the contact element, an explosive piston or explosive plate may also be provided, wherein the explosive piston or explosive plate is accelerated by the ignition of explosives in each case, and the acceleration is transmitted to the contact element.

[0034] As described above, a projectile is particularly preferred, having a central body with a cutting portion and a supporting portion. The contact element may be arranged on the supporting portion in the form of a sleeve or ring. In this case, the contact element preferably has an outer diameter larger than the central body, at least in the cutting portion.

[0035] The cutting section can be configured to cut an opening in the sheet stack, the inner diameter of which is smaller than the outer diameter of the contact element. When the contact element penetrates this opening, it is thus pressed into the opening. This configuration can be particularly combined with a hole created in the sheet stack before the projectile is sealed. The projectile is then fired into this hole.

[0036] At least before the contact element or projectile is fired, the inner diameter of the hole is preferably smaller than the outer diameter of the cut portion. Therefore, the cut portion widens the hole during penetration. This allows the inner wall of the hole to be separated from any oxide layer contained therein. This is advantageous if the borehole is drilled outside the protective chamber. In this case, the oxide layer typically forms on the inner wall.

[0037] Before the projectile is fired, the inner diameter of the hole is preferably 5% to 20% smaller than the outer diameter of the central body in the cut section. The outer diameter of the central body in the cut section is also preferably 5% to 20% smaller than the outer diameter of the contact element.

[0038] Diffusion welds are preferably generated by heat converted from kinetic energy. If necessary, additional heat can be introduced into the contact elements via heating elements before firing or during acceleration. This eliminates the need to subsequently generate a diffusion weld by heating the stack of plates already inserted into the contact elements.

[0039] Preferably, the contact element is permanently retained within the sheet stack, while the remaining projectile, i.e., the central body, separates from the composite. Particularly preferably, the remaining projectile, i.e., the central body, has already separated upon its entry into the sheet stack. In other words, the contact element remains within the sheet stack, while the remaining projectile continues to move and exits the sheet stack on the rear side. The term "rear side" refers to the side of the sheet stack opposite the side where the contact element first impacts. Alternatively, the central body can also be separated in a separate process step. For this purpose, the central body can be pushed or knocked out of the sheet composite using a suitable tool, such as a punch.

[0040] The metal sheet composite according to the invention is characterized by comprising a sheet stack and at least one contact element that electrically and mechanically interconnects at least a subset of the sheet conductors, wherein the contact element is injected into the stack. Specifically, this is a metal sheet composite produced using the arrangement according to the invention and / or the method according to the invention. The individual sheets are preferably made of aluminum. Preferably, each sheet has a thickness of a few millimeters, for example, 1 ± 0.5 mm. The preferred number of sheets in the sheet stack interconnected by the contact element is between 3 and 6. However, fewer than 3 or more than 6 sheets are also possible. These sheets are preferably part of the module connector of a battery module, especially for battery modules used in electric vehicles. Of course, sheets with other functions can also be used.

[0041] The invention will now be explained in more detail with reference to the accompanying drawings and preferred embodiments. The combinations of features exemplarily shown in the embodiments may be supplemented by further features as explained above, depending on the properties of the arrangement structure according to the invention required for a particular application. Similarly, as explained above, if the effect of a single feature is not important in a particular application, that feature may be omitted from the described embodiments. In the drawings, the same reference numerals are always used for elements with the same function and / or the same structure. The drawings are not drawn to scale and are for illustrative purposes only. Attached Figure Description

[0042] In the attached diagram:

[0043] Figure 1 A schematic diagram of the arrangement structure according to the present invention is shown;

[0044] Figure 2 A schematic diagram of a projectile launched before the impact plate stack is shown;

[0045] Figure 3 It shows Figure 2 A schematic diagram of a projectile and a stack of fragments, in which the projectile partially penetrates;

[0046] Figure 4 It shows Figure 2 The stacked pieces and the injected Figure 2 The contact elements of the projectile, together forming a composite sheet; and

[0047] Figure 5 Another preferred embodiment of the central body for projectile firing is shown. Detailed Implementation

[0048] Below, refer to Figure 1 The arrangement structure 1 according to the present invention is described.

[0049] Arrangement 1 includes a protective chamber 3, which may in particular be a vacuum chamber 5. That is, the protective chamber 3 can be configured to generate a negative pressure 4 relative to the normal pressure 6 outside the chamber 3.

[0050] Inside the protective chamber 3, there is a workpiece position 7 where a workpiece 9 can be arranged. The workpiece position 7 may have a retainer for holding the workpiece 9 or a shelf for placing the workpiece 9. Alternatively or additionally, an anvil or other suitable element may be provided at the workpiece position 7, which can absorb the force that occurs when a contact element impacts.

[0051] The workpiece 9 is preferably a stack of sheets 11 formed by arranging a plurality of sheets 13 one on top of another. Alternatively, the workpiece 9 may also be a single sheet, plate, or other rigid body. The embodiments are described by way of example only, with reference to the stack of sheets 11 as the workpiece 9.

[0052] The sheet 13 is preferably made of aluminum 15. The sheet stack 11 can be arranged entirely inside the protective chamber 3. Alternatively, only a portion of the sheet stack 11 or the workpiece 9 can be arranged inside the protective chamber 3, while the other portion is arranged outside the protective chamber 3.

[0053] The device 1 includes an acceleration device 17. The acceleration device 17 is used to accelerate the contact element 19. The contact element 19 can be accelerated by the acceleration device 17 and fired along the firing direction 21. The firing direction 21 is preferably directed toward the workpiece position 7, so that the contact element 19 can be fired into the sheet stack 11. The contact element 19 is preferably made of copper 20 or a copper-containing alloy.

[0054] The arrangement structure 1 may also include a heating element 23, which is provided with at least one induction coil 25 for heating the contact element 19.

[0055] In addition, the arrangement structure 1 may include a drilling device 27 configured to create holes 29 in the sheet stack 11.

[0056] The acceleration device 17 is preferably configured to accelerate the contact element to a speed greater than 200 m / s, particularly preferably greater than 300 m / s. The acceleration device 17 preferably includes an electromagnetic system for acceleration. For example, the acceleration device 17 may include one or more coils 31 by which the contact element 19 can be accelerated according to the principle of a Gaussian gun. Alternatively or additionally, the acceleration device may include a bracket 33 (shown in dashed lines) that can be electrically connected to a current-carrying rail 35, such that when current flows through the rail 35 and the bracket 33, the bracket 33 can be accelerated in a railgun manner.

[0057] Additional alternatives (not shown) to accelerating the contact element 19 via the acceleration device 17 may include igniting an explosive. For example, the explosion of the explosive may accelerate an explosive plate or piston, which transmits motion to the contact element 19 and causes it to move in the ejection direction 21.

[0058] The following is for reference. Figures 2 to 4 Further details are provided regarding the arrangement structure 1 according to the invention, the projectile 37, the metal sheet composite 61 according to the invention, and the method according to the invention. See also... Figure 1 .

[0059] First, the projectile 37 is described, which may be part of the arrangement structure 1. Figure 2 Projectile 37 is shown in a side view and a cross-section along section line AA.

[0060] The contact element 19 forms a sub-part 38 of the projectile 37. The projectile 37 has a central body 39 with a cutting portion 41 and a support portion 43. The contact element 19 is arranged in the support portion 43. The cutting portion 41 is located in front of the support portion 43 in the firing direction 21. This means that the cutting portion first impacts the sheet stack 11.

[0061] The cutting portion 41 is configured to cut at least a portion of the sheet 13 of the stack 11. This will be discussed further below. The central body 39 preferably has a completely cylindrical shape, i.e., the shape of a bolt. The contact element 19 preferably has a hollow cylindrical shape and is arranged around the central body 39 at its support portion 43. This also results in an overall cylindrical shape for the projectile 37.

[0062] In other words, the central body 39, with its supporting portion 43, is inserted into the sleeve-shaped contact element 19. The central body 39 and the contact element 19 together form a composite 40.

[0063] The central body 39 and the contact element 19 can be connected by press fit, so that the two parts will not accidentally separate, especially during acceleration.

[0064] The central body 39 is preferably made of ferrite, especially for the purpose of facilitating electromagnetic acceleration. The contact element 19 is preferably made of copper 20, and the sheet 13 for the electrical and mechanical connection of the stack 11 is preferably made of aluminum 15.

[0065] The diameter 45 of the central body, particularly the diameter 45 in the cut portion 41, is preferably smaller than the outer diameter 47 of the contact element 19. The diameter 45 of the central body in the cut portion 41 is preferably larger than the inner diameter 49 of the hole 29.

[0066] The metal sheet stack 11 may be provided with holes 29 in preparation for connection to the contact element 19. Assuming that the sheet stack 11 has been exposed to oxygen after the holes 29 are formed, an oxide layer 53 will be present on the inner wall 51 of the holes 29. Typically, the surface of the sheet 13 also has an oxide layer. However, these are not shown.

[0067] The following describes a method for manufacturing diffusion welded joints.

[0068] Arrangement structure 1 is preferably used to perform this method.

[0069] As described above, the hole 29 is preferably first formed in the sheet stack 11 to prepare for the fabrication of a diffusion welded joint. The hole 29 preferably extends perpendicular to the sheet plane 55 formed by the sheets 13 of the sheet stack 11. The hole 29 can be formed in the sheet stack 11 inside or outside the protective chamber 3.

[0070] After insertion into the hole 29, the sheet stack 11, particularly the portion of the sheet stack 11 including the hole 29, is arranged in the protective chamber 3 such that the ejection direction 21 coincides with the axis 57 of the hole 29. In other words, the acceleration device 17 and the sheet stack 11 are aligned relative to each other so that the contact element 19 can be ejected into the hole 29.

[0071] Before or during acceleration by the acceleration device 17, the contact element 19 can be heated by the heating element 23.

[0072] However, this is not absolutely necessary.

[0073] A vacuum 4 is preferably created in the protective chamber 3 before the contact element 19 is injected into the sheet stack 11. Alternatively, the protective chamber 3 may also be filled with a protective gas, particularly an inert gas.

[0074] In order to insert the contact element 19 into the sheet stack 11, the projectile 37 is accelerated by the acceleration device 17 and flies towards the sheet stack 11 along the firing direction 21. This situation is as follows: Figure 2 As shown.

[0075] The projectile 37, carrying the cutting section 41, flies forward toward the sheet stack 11. Upon impact with the sheet stack 11, the cutting section 41 cuts off a portion of the sheet 13 surrounding the hole 29. In this process, the oxide layer surrounding the hole 29 is also removed. This enlarges the hole 29 to the diameter 45 of the central body 39 within the cutting section 41. This... Figure 3 As shown in the image.

[0076] The support portion 43, on which the contact element 19 is arranged, follows the cutting portion 41 into the sheet stack 11. This further enlarges the inner diameter of the hole 29. When the projectile 37 is inserted into the sheet stack 11, the projectile 37 is decelerated. The kinetic energy of the projectile 37 is thus converted into heat energy. As a result, the projectile 37 becomes hot.

[0077] Preferably, the dimensions of the hole 29, the central body 39, and the contact element 19, as well as the velocity of the projectile 37 and the heating of the projectile 37 (which may have occurred previously), are coordinated such that the contact element 19 both penetrates the sheet stack 11 until it connects all the sheets 13 of the sheet stack 11 and has sufficient thermal energy to form a diffusion weld connection 59 with the sheets 13 of the sheet stack 11.

[0078] diffusion welding connection at Figure 4The area is indicated by a dashed line. In this area, atoms of contact element 19 have diffused into the sheet, and atoms of sheet 13 have diffused into contact element 19. As a result, contact element 19 is mechanically and electrically connected to sheet 13 of sheet stack 11. This connection creates metal sheet composite 61.

[0079] In the completed sheet composite 61, the central body 39 is no longer needed. Therefore, it can be separated from the contact element 19 again and is preferably reused. In the simplest case, the central body 39 has sufficient kinetic energy to leave the sheet stack 11 in the ejection direction 21 upon impact. In other words, the central body 39 continues to fly while the contact element 19 remains in the sheet stack 11. Alternatively, after the sheet composite 61 has been produced, the central body 39 can be mechanically separated from the contact element 19. For this purpose, the central body 39 can be pressed out of the contact element 19, for example, using a suitable tool, such as a punch (not shown). The central body 39 can then be fitted with a new contact element 19 and fired into the sheet stack 11 again.

[0080] Figure 5 Another preferred embodiment for the central body 39 of the projectile 37 is shown. For better illustration, in... Figure 5 The image also shows a sleeve-shaped contact element 19.

[0081] The central body 39 of the second embodiment does not have a continuous cylindrical shape. Instead, it has a shoulder 65 at its end 63 pointing in the emission direction 21, which increases the diameter 45 of the central body 39. The shoulder 65 thus represents an enlargement of the cross-section of the central body 39.

[0082] The shoulder 65 may have a flange or ring shape. The diameter 45 of the central body 39 in the region of the shoulder 65 is preferably such that the central body 39 cannot penetrate the sleeve-shaped contact element 19. Consequently, the contact element 19 on the central body 39 cannot be pushed beyond the shoulder 65. Therefore, it is reliably held by the shoulder 65 at least in the ejection direction 21.

[0083] Because the shoulder 65 can hold the contact element 19 on the central body 39 at least in the ejection direction 21, no additional interference fit is required between the central body 39 and the contact element 19.

[0084] Figure Labels

[0085] 1. Layout Structure

[0086] 3 Protective Chambers

[0087] 4 negative pressure

[0088] 5 vacuum chambers

[0089] 6 Normal pressure

[0090] 7. Workpiece position

[0091] 9 workpieces

[0092] 11 stacked pieces

[0093] 13 pieces

[0094] 15 Aluminum

[0095] 17 Acceleration Devices

[0096] 19 Contact Elements

[0097] 20 copper

[0098] 21. Launch direction

[0099] 23 heating elements

[0100] 25 induction coils

[0101] 27 Drilling Equipment

[0102] 29 holes

[0103] 31 coils

[0104] 33 brackets

[0105] 35 tracks

[0106] 37 projectiles

[0107] 38 sub-parts

[0108] 39 main body

[0109] 40 complex

[0110] 41 Cutting Section

[0111] 43 Supporting parts

[0112] 45. Diameter of the central body

[0113] 47 Outer diameter of contact element

[0114] 49 inner diameter

[0115] 51 Inner Wall

[0116] 53 Oxide Layer

[0117] 55 flat surfaces

[0118] 57 axis

[0119] 59 Diffusion Welding Connection

[0120] 61-piece complex

[0121] 63 The end of the central body pointing in the direction of emission

[0122] 65 shoulder

Claims

1. An arrangement (1) for fabricating a diffusion welded connection (59) between a conductive contact element (19) and a workpiece (9), wherein, The arrangement structure (1) includes a protective chamber (3) and an acceleration device (17), with a workpiece position (7) located in the protective chamber for arranging at least a portion of the workpiece (9), and the acceleration device configured to inject the contact element (19) into the workpiece (9) arranged at the workpiece position (7). The arrangement structure (1) further includes: At least one projectile (37), wherein the contact element (19) forms at least one sub-part (38) of the projectile (37); and A drilling device (27) is configured to produce a hole (29) in the workpiece (9); The projectile (37) includes a central body (39) having a cutting portion (41) and a supporting portion (43), the cutting portion (41) being configured to cut off a portion of the workpiece (9) around the hole (29) when the contact element (19) is fired into the hole (29), and the supporting portion (43) being configured to support the contact element (19).

2. The arrangement structure (1) according to claim 1, wherein, The projectile (37) has a cylindrical shape.

3. The arrangement structure (1) according to claim 1 or 2, wherein, The arrangement structure (1) includes at least one heating element (23) configured to heat the contact element (19) before or during the acceleration of the contact element (19) by the acceleration device (17).

4. The arrangement structure (1) according to claim 1 or 2, wherein, The protective chamber (3) is configured to generate a negative pressure (4) relative to the normal pressure (6) outside the protective chamber (3).

5. A method for manufacturing a diffusion welded connection (59) between a conductive contact element (19) and a workpiece (9) using an arrangement (1) according to any one of claims 1 to 4, wherein, The contact element (19) is injected into the workpiece (9) and is mechanically and electrically connected to the workpiece (9) by injection.

6. The method according to claim 5, wherein, The contact element (19) is fired into the workpiece (9) as a projectile (37), and the contact element (19) forms at least one sub-part (38) of the projectile.

7. The method according to claim 6, wherein, The contact element (19) remains in the workpiece (9), and the remaining projectile (37) separates from the workpiece.

8. The method according to claim 6 or 7, wherein, The projectile (37) cuts and releases a portion of the workpiece (9) during its movement through the workpiece (9), and the contact element (19) then forms a diffusion weld connection (59) with the portion of the workpiece (9).

9. The method according to claim 6 or 7, wherein, At least one hole (29) is created extending through the workpiece (9), and the contact element (19) is then injected into the hole (29).

10. The method according to claim 9, wherein, The diameter (45, 47) of the contact element (19) and / or the projectile (37) is greater than the inner diameter (49) of the hole (29).

11. The method according to claim 6 or 7, wherein, The contact element (19) is heated before being injected into the workpiece (9).

12. The method according to any one of claims 5 to 7, wherein, The workpiece (9) is a stack of sheets (11) formed by arranging multiple sheets (13) one on top of another; or the workpiece (9) is a single sheet or plate.

Images