WO2015043951A1

WO2015043951A1 - Method for producing bands and strips consisting of two metal materials

Info

Publication number: WO2015043951A1
Application number: PCT/EP2014/069279
Authority: WO
Inventors: Joachim-Franz Schmidt; Marcel Neubauer; Elisa Wieseler
Original assignee: Heraeus Deutschland GmbH & Co. KG
Priority date: 2013-09-26
Filing date: 2014-09-10
Publication date: 2015-04-02
Also published as: DE102013219404A1

Abstract

The invention relates to a method for producing a band (10) from two different metals and/or from metal alloys consisting of bands (1, 2, 3). In said method: the metals and/or metal alloys of the band (10) are permanently connected to one another by roll bonding; two first metal bands (1, 2) and a second band (3) consisting of another metal or another metal alloy are profiled on two respective contact edges (5), starting from one edge (5) of each band and extending into one of the parallel surfaces (6), during this profiling process a cut-out section (8) being formed over the whole length to be connected of the first bands (1, 2) by the removal of material from two of the bands (1, 2, 3) and said edge (5) being removed from the whole length to be connected; the bands (1, 2, 3) are positioned relative to one another, the first two bands (1, 2) being interspaced and the second band (3) being laid against or on the first bands by means of a cut-out section (8) on each of the first bands (1, 2); the second band (3) is laid such that it bridges the distance between two first bands (1, 2) and the bands (1, 2, 3) are joined together by the roll bonding of the bands (1, 2, 3) that are laid against one another, the roll bonding thus producing a continuous third band (10) comprising two parallel surfaces. The invention also relates inter alia to the production of strips (11) and pressed screens and to the use of metal strips (11). The invention further relates to a battery having a number of battery elements or a number of galvanic cells.

Description

Method for producing strips and strips of two metallic materials

The invention relates to a method for producing a strip of two different metals and / or metallic alloys from strips, in which the metals and / or the metallic alloys of the strip are firmly joined together by roll-plating, as well as a method for producing a plurality of strips or punched gratings two

different metals and / or metallic alloys from tapes, in which the metals and / or metallic alloys are firmly bonded together by roll-bonding.

The invention also relates to the use of metallic strips produced in this way for the electrical contacting of at least two battery elements or at least two galvanic elements. Furthermore, the invention relates to metallic strips, stamped grids and strips made of two different metals and / or produced in this way

Metal alloys and a battery having a plurality of battery elements or a plurality of galvanic cells, wherein the battery elements or galvanic cells are electrically connected to such metallic strips.

Metallic strips of two different metallic materials are used in particular as connectors for battery elements or galvanic elements of batteries or accumulators. At present, lithium-ion batteries (or lithium-ion accumulators) and nickel-metal hydride batteries (or nickel-metal hydride accumulators) are being produced in large quantities. Here are the interconnection and

Connection of the individual cells of the batteries or the batteries with each other

used metallic strip.

The combination of two different metals can be difficult if they can not be joined simply by joining. Walzplattierverfahren are gladly used for this purpose, wherein the metals are initially present in mass production as tapes, which are joined together with a roll by roll-plating. Such a method is known for example from US 4,798,932 A1.

For producing tapes or strips produced therefrom for connecting batteries or their cells, these can be produced, for example, using a cold-rolled plating method, as described, for example, in DE 2008 018 204 A1. Especially the Application of these metallic strips as connectors for battery elements requires a double-sided purity of the different metals and / or metal alloys.

US 2011/0 206 943 A1 proposes to solve these problems, to achieve a connection of the two materials by a larger overlap area. For this purpose, the two adjoining points are suitably shaped so that they can be placed inside each other and grip each other. This has the disadvantage that the two parts to be joined together with great care must be elaborately formed and that the two parts must be placed exactly together before they with the subsequent

Walzverfahren be joined together. When rolling a joint, the pressure must also be applied with care to the joint, so that the compound remains homogeneous through a uniform flow of material.

The object of the invention is therefore to overcome the disadvantages of the prior art. In particular, a method is to be found which is as simple as possible to carry out, which can be realized as inexpensively as possible and which is suitable for the

Mass production is suitable. At the same time, however, the method is also intended to produce connections of the two metallic materials of the metal strips which are as stable as possible.

The objects of the invention are achieved by a method for producing a strip of two different metals and / or metallic alloys from strips, in which the metals and / or the metallic alloys of the strip are firmly joined together by roll-bonding, characterized by the following, chronologically

consecutive steps:

A) providing two first metallic bands and a second band made of a different metal or another metallic alloy, wherein all bands have four edges, two mutually parallel surfaces and an at least approximately rectangular cross section,

B) profiling of the first bands starting from one edge in one of the mutually parallel surfaces, wherein in the profiling over the entire length of the first bands to be connected a recess by removal of material from the first bands is formed and this edge on the whole to C) positioning the bands to each other, wherein the two first bands are arranged spaced from each other, the non-profiled surfaces of the first bands in a plane be arranged side by side and the recesses of the first bands are arranged mirror images of each other and adjacent, and wherein the second band in the

Recesses of the first bands are placed adjacent or overlying, and the second band is bridged over the spacing of the first two bands; and D) the bands are joined together by roll-plating the juxtaposed bands, whereby by rolling plating, a continuous third band having two parallel surfaces is produced becomes.

According to an alternative solution, the objects according to the invention are also achieved by a method for producing a band of two different metals and / or metallic alloys from strips, in which the metals and / or metallic

Alloys of the strip are firmly joined together by roll-bonding,

characterized by the following chronological successive steps:

B) profiling of the second band starting from one edge into each of the mutually parallel surfaces, said surface connecting these two edges, wherein in the profiling over the entire length of the second band to be joined two recesses by removing material from the second band arise and the two edges are removed on the entire length to be connected by one of the two recesses,

C) Positioning the bands to each other, wherein the two first bands are arranged spaced from each other and the parallel surfaces of the first bands are arranged in a plane next to each other, and wherein the second band is arranged adjacent to the first bands or resting, that the two first tapes in each one

Recess of the second band are arranged and that the second band is arranged bridging the distance between the two first bands, and

D) joining the tapes together by roll-plating the juxtaposed tapes, wherein by roll-plating a continuous third tap having two parallel ones

Surfaces is generated. However, the objects of the invention are also achieved by a method for producing a strip of two different metals and / or metallic alloys from strips, in which the metals and / or the metallic alloys of the strip are firmly joined together by roll-bonding, characterized by the following , chronologically

consecutive steps:

A) providing two first metallic bands and a second band of a different metal or other metallic alloy, all bands having four edges, two mutually parallel surfaces and an at least approximately rectangular cross section, B) profiling one of the first bands and the second Bands starting from one edge in one of the mutually parallel surfaces inside, wherein in the profiling over the entire length to be joined of a first band and the second band a

Recess is formed by removing material from the two bands and this edge is removed over the entire length to be joined, C) positioning the bands to each other, wherein the two first bands to each other

be arranged spaced apart, the parallel surfaces of the first bands are arranged in a plane next to each other, and wherein the second band is disposed in the recess of the profiled first band adjacent or resting, the unprofiled first band is disposed in the recess of the second band and the second volume the

Distance between the two first bands is bridged, and

D) bonding the tapes together by roll-plating the juxtaposed tapes, wherein the roll-plating produces a continuous third tap having two parallel faces.

The entire length of the bands to be connected preferably extends over the entire length of the bands. The entire length to be connected thereby relates at least to the area of a band which is then to be used to build up the strips, that is to say the area over which the bands are to be connected to one another. It can thus be provided that at the beginning and at the end of the bands or of the band with respect to the total length of the bands or the band short sections are not profiled. The rectangular cross-section of the bands must be only roughly adhered to, so that it is sufficient if the bands have an approximate rectangular cross-section. Prefers The bands have a good approximation rectangular cross-section, it being sufficient if the right angles are maintained with an accuracy of 5 °. The four corners of the cross section are formed by the edges. The cutting process (overcut or undercut) or the folding of the ribbons will result in inaccuracies in the shape of the edges, so that the corners of the rectangular cross section will always deviate from an ideal corner shape. For example, the edges can be warped (eg pulled down) during separation. The edges can also be slightly rounded. The edges bound the parallel surfaces of the two bands in their entire length.

Also preferably, the two surfaces of the bands are plane-parallel to each other. Furthermore, it is preferred if the ratio of the width of the bands (parallel to the broad sides) to the height of the bands (parallel to the narrow sides, which may also be referred to as the thickness of the bands), in particular also of the produced band, is at least 10: 1, preferably between 20: 1 and 100: 1.

The third band is thus made from the first two bands and the second. It may be provided that not only the edges from which the recesses extend are removed by the recesses, but also the nearest edge of the same band. This closest edge limits the opposite face of the tape on the same side. This practically creates a new edge on the underside. This is advantageous if the newly created edge is to be executed particularly tapered.

It may also be provided in the method according to the invention that the production of the two recesses during profiling is carried out with a machining technique. The profiling preferably takes place by milling.

These techniques are particularly applicable to continuous tape processing.

With a preferred further development of the method according to the invention

proposed that each band consists of only one metal or a metallic alloy, wherein preferably the two first bands consist of the same metal or the same metallic alloy. As a result, the method can be simplified because the bands can also be arranged offset in the longitudinal direction against each other, without thereby the wrong areas would be interconnected.

It is particularly preferred that the material of which the strips are made is selected from copper, aluminum, aluminum-based alloys and / or

Copper-based alloys.

Preferably, the first bands of copper and the second band of aluminum or the first bands of aluminum and the second band of copper.

These materials are particularly well suited for battery connectors and the strips produced therefrom therefore economically particularly well usable.

According to a further development of the methods according to the invention, it can be provided that, when the strips are connected to one another by roll-plating, the strips are deformed, the height of the generated third strip being less than the height of the first strips and the second strip. The height of a band (which may also be referred to as the thickness of the band) corresponds to the distance between the two parallel faces of the unprofiled band. By forming a stable connection of the different materials of the bands is achieved.

In this further development, it may further be provided that heat is supplied to the bands during the forming and the height of the generated third band is at least 20% less than the height of the three output bands.

This small deformation may already be sufficient in the supply of heat energy in order to achieve a stable connection of the materials. The heat can be supplied for example by means of a current, inductive or heated roll cladding.

Alternatively, it can be provided that during the forming of the bands no heat is supplied and the height of the generated third band is at least 40% less than the height of the three output bands.

This degree of deformation is necessary when no heat is applied to achieve the desired stable bond between the materials. The method according to the invention can be implemented particularly well if it is provided that the heights of the first two bands and of the second band are between 0.5 mm and 5 mm and after the roll cladding the generated third band has a height of 0.1 mm to 2 mm wherein the height of the generated third band is less than the height of the first bands and the second band.

These dimensions are well processable and sufficient for the use of connectors for batteries or accumulators or for punched grid.

It can also be provided that the first two bands have a width between 10 mm and 100 mm and the second band is at least as wide as the first bands and up to three times as wide as the first bands.

The width of the bands corresponds to the width of the parallel surfaces of the bands. Preferably, the first two bands are the same width or width deviates only by a maximum of 10%

from each other.

Through these widths of the bands connecting the bands can be done by roll cladding without much technical effort. Preferably, the second band is between 90% and 140% wider than the equal width first bands. This has the advantage that in a separation of the generated third band by a longitudinal section in the second band two bands are formed, which have approximately the same length of the two materials to the compound and the connection of the two materials runs centrally. In order to provide a method which is particularly suitable for mass production, it can preferably be provided in all methods according to the invention that, when profiling the two bands or the second band, an unprofiled band is first unwound from a roll, the recess being produced by a subtractive method, preferably with a chipping technique or a milling technique is generated, and the profiled strip is then wound up again into a roll.

The use of wound rolls makes it possible to process large quantities of strips with compact equipment.

In order to produce a particularly stable connection, it can be provided according to the invention that a roll-plating method is used when joining the strips together. Roll-plating processes are particularly advantageous for implementing the process according to the invention.

For the mass production of the strips can also be preferably provided that when positioning the bands to each other, the bands are unwound from one roll, then the bands are positioned by deflection rollers in front of a nip in the desired manner to each other, then the thus positioned to each other bands rolled together and with each other and then the third band thus produced is wound into a roll.

By deflecting by means of guide rollers, it is possible to store the coils also spaced from each other and unwind.

In order to achieve a slight joining of the bands, it is proposed that each profiled band having at least one recess has the same cross-section at least along the length to be joined.

This means that all profiled tapes are just general cylinders at least along the length to be connected. Of course, the same applies to the non-profiled tapes. That is, the profiled ribbons in this region have a geometric shape that results from translating the cross-sectional area in a direction perpendicular to the cross-sectional area.

This simplifies the further processing of the tapes. When roll cladding or joining the metallic materials can be used with a uniform pressure and optionally with a constant supply of heat.

According to an embodiment of the method according to the invention, which is particularly preferred according to the invention, it can be provided that each of the two recesses is produced with a first, a second and a third flat boundary surface, wherein the first

Boundary surface and the third boundary surface to the surface of the belt in which the recess is generated or the recesses are generated are generated inclined towards the second boundary surface parallel to the plane of this surface of the belt, so that the parallel second boundary surface between the two inclined

Boundary surfaces is arranged and the first boundary surface adjacent to the surface of the belt, in which the recess is produced or the recesses are generated. Such a recess results in an inserted band having a rectangular cross section to a particularly stable connection after the roll cladding, since the edge of the inserted tape can cut well into the inclined first boundary surface.

It can be provided that the recess is produced such that the angle of the first boundary surface to the Lot of the surface of the belt in which the recess is generated or the recesses are generated, between 7 ° and 25 °, preferably between 15 ° and 20 °, and the angle of the third boundary surface to the Lot of the surface of the belt in which the recess is generated or the recesses are generated, is between 20 ° and 60 °, preferably between 30 ° and 45 °. At these angles, a particularly stable incision (sometimes referred to as "beaking") of the applied edges occurs.

Furthermore, it can be provided in these embodiments that the recess is produced such that the width of the second boundary surface is between 2 mm and 10 mm.

The width ensures a good circulation of the band to be connected via the recess. In a further development of the invention, it is proposed that the recess be produced in such a way that the distance of the second boundary surface from the non-deformed surface of the band is between 60% and 20% of the height of the band without the recess, preferably between 25% and 40%. ,

Due to this depth of the recess, the recess is able to absorb a suitable volume of the applied band during roll cladding, that is to say during the forming, wherein not too much material has to be displaced from the connection points.

According to a further embodiment of the invention can also be provided that the distance between the two first bands is set such that the edges of the in the

Recesses adjacent bands rest on inclined boundary surfaces of the recesses. In recesses with an inclined boundary surface may be provided that the edges of the voltage applied to the recesses tapes on the first

Restrict surfaces of the recesses.

As a result, by cutting or biting the applied edges in the recesses in the roll cladding a particularly stable connection of

different materials are generated. The objects relating to the production of strips of at least two different metals and / or metallic alloys are achieved by a method for producing a plurality of strips of two different metals and / or metallic alloys from strips, in which the metals and / or metallic alloys pass through one another

Rolling cladding are firmly bonded together, wherein the strips are produced from a strip which has been produced by a described method according to the invention, wherein after the production of the third band of the following method step takes place:

E) the third band thus produced is separated into strips.

In this method according to the invention, provision can be made for the method to produce a plurality of battery connectors or accumulator connectors.

The metallic strips of two metallic materials are then the battery connectors or accumulator connectors.

With the method according to the invention can battery connector or

Accumulator connectors are manufactured quickly and inexpensively in a mass production. This is particularly interesting with increasing economic use of batteries and accumulators.

Furthermore, according to the invention it can be provided that the separation of the generated third band is carried out by cutting or punching in the longitudinal direction of the third band in the metal or the metallic alloy of the second band and the strips are then cut parallel or parallel to the longitudinal direction of the third band third bands are generated.

Strictly speaking, the strips are then produced by parallel cuts or parallel punchings perpendicularly or diagonally to the longitudinal direction of both separate parts or halves of the third strip. This specifies a method which can be implemented easily and inexpensively, with which the strips can be produced.

In a preferred further development of the method relating to the strips, it is proposed that in step E) the generated third strip be separated into strips each containing exactly one compound of two different materials of a first band and the second band, the portion of the third band from the second volume has been generated, is separated and perpendicular or diagonal to make several separations to produce the strip.

This allows many strips to be produced in a simple manner.

The objects of the invention are further achieved by a method of producing a stamped grid of two or three different metals and / or metallic alloys from tapes, in which the metals and / or metallic alloys pass through one another

Walzplattieren be firmly bonded together, wherein the punched grid is made of a strip which has been produced by a described method according to the invention, wherein after the production of the third band of the following method step is carried out: E) the thus produced third band is by punching out areas of the third Bands transformed into the punched grid.

The objects underlying the invention are also achieved by the use of metallic strips produced in this way for the electrical contacting of at least two battery elements or at least two galvanic elements. The strips produced according to the invention can be used well for the purposes mentioned and at the same time are inexpensive to manufacture.

Furthermore, the objects of the invention are also achieved by a metallic strip consisting of two different metals and / or metal alloys prepared by such a method. Furthermore, the objects of the invention are also achieved by a stamped grid consisting of two or three different metals and / or metal alloys, prepared by a described inventive method for its production.

The objects of the invention are also achieved by a metallic band consisting of at least two different metals and / or metal alloys, produced by one of the above-described methods for producing a band.

Finally, advantageous batteries or accumulators result from the use of the metallic strips according to the invention, so that the invention also consists in a battery having a plurality of battery elements or a plurality of galvanic cells, wherein the Battery elements or galvanic cells are electrically connected or interconnected with such metallic strips.

The invention is based on the surprising finding that it is sufficient if two or even only one of the bands to be connected is reshaped or structured before the bands are connected to one another, and yet a stable connection over an extensive connection area is possible. A precise fit of the joints is no longer necessary due to a transformation in roll cladding. In addition, with a suitable shape of the recesses and with suitable positioning of the edges of the bands in the recesses, a particularly stable connection can be achieved in which the non-planar abutting each other but edges on boundary surfaces adjacent bands are pressed into each other during roll cladding and so by cutting or beaks very stable connect with each other.

By connecting a central second belt with two bands in the region of recesses which partially overlap the middle band, it is achieved that a homogeneous material flow during roll cladding takes place at both connection points, thereby producing a uniformly stable connection. The pressure of the rolls will be uniform on both sides and therefore will produce a more uniform pressure for roll cladding than if only one joint surface were made. The symmetry of the positioning of the bands thus causes a simplification of the manufacturing process, since the mechanical pressure in the roll cladding and the predetermined dimensions of the rollers must be set less accurately than if only two bands were connected together.

Embodiments of the invention will be explained below with reference to five schematically illustrated figures, without, however, limiting the invention. Showing:

Figure 1: schematic views of starting, intermediate and end products of a method according to the invention according to claim 1 and 21 for explaining the same;

Figure 2: schematic views of starting, intermediate and end products of a method according to the invention according to claim 2 and 21 for explaining the same;

FIG. 3; schematic views of starting, intermediate and end products of a method according to the invention according to claim 3 and 21 for explaining the same; Figure 4: an enlarged schematic cross-sectional view through a band with a

Recess to illustrate a variant of the invention

process; and

Figure 5: a flow chart for inventive method. In the figures, the same reference numerals are sometimes used for the same or similar parts.

Figure 1 shows schematic views of chronologically successive starting, intermediate and end products of a method according to the invention according to claim 1 for explaining the same. Figures 1 A) to 1 D) show schematic cross-sectional views and Figures 1 E) and 1 F) show schematic perspective views of these products. The sequence of FIGS. 1 A) to 1 D) corresponds to the chronological sequence of FIG

The sequence of FIGS. 1 A) to 1 E) corresponds to the chronological sequence of the method steps according to the invention as claimed in claim 21, which refers back to claim 1 or to a dependent claim, while FIG is the strip 1 1 according to the invention shows.

Analogously, FIG. 2 shows schematic views of chronologically successive starting, intermediate and end products of an alternative method according to the invention as claimed in claim 2 for explaining the same. Figures 2 A) to 2 D) show schematic cross-sectional views and Figures 2 E) and 2 F) show schematic perspective views of these products. The sequence of FIGS. 2 A) to 2 D) corresponds to FIG

Chronological sequence of the method steps according to claim 2. The sequence of Figures 2 A) to 2 E) corresponds to the chronological sequence of

Process steps according to claim 21 according to claim 21, which refers back to claim 2 or a dependent claim, while Figure 2 F) shows the end product produced, that is, the strip 1 1 according to the invention.

Accordingly, FIG. 3 also shows schematic views of chronologically successive starting, intermediate and end products of a third invention

Method according to Claim 3 for explaining the same. FIGS. 3 A) to 3 D) show schematic cross-sectional views, and FIGS. 3 E) and 3 F) show schematic perspective views of these products. The sequence of FIGS. 3 A) to 3 D) corresponds to the chronological sequence of the method steps according to the invention as claimed in claim 3 Sequence of Figures 3 A) to 3 E) corresponds to the chronological sequence of

Process steps according to Claim 21 according to the invention, which refer back to Claim 3 or to a claim dependent thereon, while Figure 3 F) shows the final product produced, that is to say the strip 11 according to the invention. Two first metallic bands 1, 2 are shown in Figures 1 A), 2 A) and 3A), which are shown to the right and left of a middle, second metallic strip 2 with greater width. The bands 1, 2, 3 are not necessarily physical in this process step

arranged side by side. The figures 1 A), 2 A) and 3A) thus initially show only that these three metallic bands 1, 2, 3 are provided. The same applies to the figures 1 B), 2 B) and 3B).

The bands 1, 2, 3 may for example consist of aluminum, copper, a copper-based alloy or an aluminum-based alloy. However, the band 3 shown in the middle consists in any case of a different metal or a different metallic alloy than the two outer bands 1, 2. Each band 1, 2, 3 has a rectangular cross-section, four edges 4, 5 (the corners of the rectangular cross section) and two plane-parallel surfaces 6, 7 (the sides of the rectangular cross-section). The surfaces 6, 7 are referred to below as the first surface 6 and the second surface 7. Moreover, because of the unitary designation in FIGS. 1, 2 and 3, it is always assumed that the edges 5 delimit the first surface 6 on one side or on both sides. In a next method step, two recesses 8 are produced in the bands 1, 2, 3 by means of a milling process. The two edges 5 are completely removed. The milled bands 1, 2, 3 are shown in Figures 1 B), 2 B) and 3 B). In the method illustrated in FIG. 1, the two recesses 8 are produced in the outer bands 1, 2 (one each) and the middle band 3 does not become

except / structured. In the method shown in Figure 2, the two recesses 8 are produced in the middle band 3 on the same side and the same (first) surface 6 and the later outer bands 1, 2 are not

except / structured. In the method illustrated in FIG

Recess 8 in the middle band 3 and a further recess 8 produced in one of the later outer bands 1 and the other later outer band 2 is not excluded / structured.

The milled bands 1, 2, 3 extend with the cross section shown along their entire length or at least along the length on which the bands 1, 2, 3 to each other be added or attached. The recesses 8 extend a few millimeters into one of the surfaces (into the first surface 6) and extend to the edge 4, which is opposite to the distal edge 5 on the second surface 7. It is also possible that this edge 4 is also removed and thus forms a new edge 4. Each recess 8 has three boundary surfaces, which are the recesses 8

or limit the bands 1, 2, 3 in the recesses 8. A first

Boundary surface 9 extends from the first surface 6 in the respective band 1, 2, 3 and is inclined at an angle of 15 ° to 20 ° from the perpendicular of the first surface 6 in the direction of the distal edge 5 of the recess 8. A second boundary surface is parallel to the second side 7 and a third boundary surface of the recess 8 adjoins the edge 4 opposite the former edge 5 and is at an angle of 30 ° to 60 ° from the perpendicular of the second surface 7 in the direction of the distal edge 5 Recess 8 inclined. A detailed representation of the recess 8 is shown in FIG.

The boundary surface 9 is used to create a stable connection to the other bands 1, 2, 3 by applying edges 4 of the other bands 1, 2, 3 there. For this purpose, the bands 1, 2, 3 are positioned in this manner to each other immediately before the roll cladding. If the bands 1, 2, 3 are not very long, they can simply be put together. When the bands 1, 2, 3 are long rolled-up bands 1, 2, 3, they must be at

Unwinding or unwinding or unwinding over guide rollers or deflection rollers when conveying into the roller are aligned in accordance with each other. After positioning, the arrangements shown in FIGS. 1C), 2C) and 3C) result. In contrast to FIGS. 1 A), 2 A), 3 A), 1 B), 2 B) and 3 B), in FIGS. 1 C), 2 C) and 3 C) the actual arrangements of the bands 1 are the same , 2, 3 shown to each other.

The two outer bands 1, 2 are thus arranged at a defined distance from each other and the middle band 3 is placed for example from above exactly on the two outer bands 1, 2, that in each case always an edge 4 of a band 1, 2, 3 at a first boundary surface 9 in a recess 8 of an other band to be connected 1, 2, 3 is applied. The middle band 3 bridges the distance of the outer bands 1, 2. Subsequently, the bands 1, 2, 3 in a further process step with a

Cold rolling method, in particular by roll cladding, or by a Walzplattierverfahren in which the bands 1, 2, 3 are heated, connected together. The result is shown in FIGS. 1 D), 2 D) and 3 D) in a schematic cross-sectional view. hereby This results in a new third band 10 of the bands 1, 2, 3, which consists of three sections or three metallic materials, which were formed from the original bands 1, 2, 3. The large overlap also ensures a stable

Connection of the different metallic materials, such as the fact that the edges 4 cut well into the flanks of the boundary surfaces 9 or beaks. The pressure during roll cladding is loaded first along two lines (namely, the edges 4) on the boundary surfaces 9. The small bearing surface creates a high pressure, which leads to a strong deformation and cold welding of the bands 1, 2, 3 at these locations ,

The strips 1, 2, 3 are formed during roll-plating so that the resulting new third strip 10 is flatter than the starting strips 1, 2, 3. The bond line between the metallic materials in Figs. 1 D), 2 D) and 3 D) but also in the figures 1 E), 2 E), 3 E), 1 F), 2 F) and 3 F) are only schematically indicated to understand. In reality, other forms, in particular due to the impressions of the edges 4 will result and the connecting lines are clear in reality

Represent "frayed" or mixed and less straightforward.

In FIGS. 1 D), 2 D) and 3 D), the method for producing the strip 10 from at least two different metals and / or metallic alloys has already been completed and a strip 10 according to the invention is produced.

In a further subsequent method step, which is necessary for implementing a method for producing strips 11 according to the invention, the resulting third strip 10 is separated by sections which are indicated by dashed lines in FIGS. 1E), 2E) and 3E) , This results in the desired strips 11, one of which is shown in each of Figures 1 F), 2 F) and 3 F) and which can be used as connecting strips for batteries or accumulators, to the individual

To connect battery elements or galvanic cells together and to contact electrically.

The advantage of the metal strips 11 of two metallic materials thus produced is that, on the one hand, the connection between the two metallic materials is very stable and, at the same time, the manufacturing process is simple and inexpensive. At least one of the bands does not have to be profiled with the method according to the invention, that is to say not be formed. At the same time, care must not be taken that the shaped recesses 8 fit exactly to a corresponding recess. The strips 11 produced by the method according to the invention are therefore even more stable with regard to Compound of the metallic materials and at the same time cheaper to manufacture than the stable compounds known from the prior art (US 201 1/0 206 943 A1).

As an alternative to the production of strips 1 1, as shown in Figures 1 to 3, also a punching process may be downstream, are struck at equal intervals uniform areas of the third band 10 and so a continuous punched grid (not shown) with side by side arranged uniform units is generated. The stamped grid may, for example, a coherent substrate for

Mass production of electronic components or assemblies be. In this case, the stamped grid is equipped with a variety of electronic components or assemblies in the prestructured units of the stamped grid and attached to the stamped grid and contacted with the stamped grid and / or each other electrically. Subsequently, the populated stamped grid is separated into individual components. The stamped grid and in particular the prestructured units of the stamped grid all have at least two different, in particular interconnected, metals and / or metallic alloys.

Figure 4 shows an enlarged schematic cross-sectional view through a band 1, 2 or 3 with a recess 8, as shown in Figures 1 B), 2 B) and 3 B) is shown. The recess 8 extends from the missing edge 5 in the first surface 6 and extends to the opposite edge 4 of the second surface 7. The original shape of the not yet profiled or not formed bands 1, 2, 3, as shown in the figures 1 A), 2 A) and 3 A) are shown in Figure 4 indicated by dashed line with long dashes.

The recess 8 has three flat boundary surfaces 9, 12, 13. The first

The boundary surface 9 extends from the first surface 6 into the respective band 1, 2, 3 and is inclined at an angle of 15 ° to 20 ° from the perpendicular of the first surface 6 in the direction of the distal edge 5 of the recess 8. The second boundary surface 12 is parallel to the second side 7 and the third boundary surface 3 of the recess 8 adjacent to the edge 4 opposite the former edge 5 and is at an angle of about 30 ° to 40 ° from the solder of the second surface 7 in the direction of the distant Edge 5 of the recess 8 inclined. The geometrical quantities in FIG. 4 are the following: α as the angle of the first boundary surface to the perpendicular of the first surface of the band, β as the angle of the third boundary surface to the perpendicular of the second surface of the band, b ₀ as the width of the first surface up to to the recess, bi as the width of the second delimiting surface, ba as the width of the first delimiting surface in the plane of the first surface of the strip, bβ as the width of the third delimiting surface in the second surface of the strip, hi as the height (thickness) bands in Area of the second boundary surface of the recess and h _ges as the height (thickness) of the band.

As a preferred embodiment of the present invention, the two outer bands 1, 2 are made of copper and the recesses 8 are milled, cut or peeled into the copper bands. The middle band 3 is made of aluminum and is not profiled or reshaped. The geometrical sizes of the copper strips are chosen as follows: total width 45 mm of the strips, α = 17 °, β = 45 °, b ₀ = 38 mm, bi = 5 mm, ba = 0.6 mm, bβ = 1.4 mm , hi = 1, 4 mm and h _ges = 3.5 mm. The aluminum strip has a height (thickness) of 4 mm and a width of 114 mm.

FIG. 5 shows a flow chart for a method according to the invention in which long strips, which are present as rolled-up coils, are processed. First of all, three rolled-up metallic metal strips of at least two different metals or alloys are provided. These have an at least approximately rectangular cross-section. A tape is unwound and a recess milled at one edge. The milled band is wound up again. Subsequently, a second band or the same band is milled in the same manner, so that either two bands each having a recess or a band with two mirror-image recesses.

Theoretically, only one band can be milled out by first providing only two bands, one of which is twice the length of the other band, is milled out, and then the band is separated in the middle of the length and wound up as two coils. Furthermore, theoretically and according to the invention, if only one strip is milled, both recesses can also be milled out in one process step.

The un-formed bands or the un-formed band is inserted together with the milled band or the milled bands in a Walzplattier machine in which the bands conveyed at the same speed by a Walzplattiereinrichtung and the Rolling gap can be supplied in a desired positioning. A similar roll-plating machine is described for example in US 4,798,932 A1.

Then, all the bands are unrolled and the bands are deflected so that one middle band separates the two other bands, the middle band being made of a different metallic material than the outer ones, and in each of the two milled recesses there is an edge of another band , After inserting the juxtaposed tapes in the nip of the Walzplattiereinrichtung, the strips are rolled and joined together. The new band emerging from the three bands will be

then wound up as a spool. At this point, the inventive method with respect to the production of the tape is already completed. The last three steps shown are optional and provide an exemplary embodiment of a method according to the invention for the production of

Strip according to the invention or a punched grid according to the invention.

The wound coil of the new tape is clamped in an automated cutting device, unrolled there and cut in the middle in the longitudinal direction and then perpendicular or diagonally thereto, so that strips are formed, each two, by

Walzplattieren joined together metallic materials.

If a punched grid is to be produced, the wound coil of the new tape is clamped in an automated punching device, unrolled there and stamped the desired structures of the stamped grid in the new band, so that stamped grid arise, each two or three, joined together by roll-plating metallic Have materials.

All process steps can be fully automated. The change of the coils from one device to the other can also be done manually without much effort. The in the foregoing description, and the claims, figures and

Embodiments disclosed features of the invention may be essential both individually and in any combination for the realization of the invention in its various embodiments. LIST OF REFERENCE NUMBERS

1 metallic band / outer band

2 Metallic band / outer band

3 Second metallic band / middle band made of other material

4 edge / edge remaining during profiling

5 edge / edge to be removed during profiling

6 First surface / surface into which the recess is formed

7 Second surface / plane parallel to the first surface

8 recess

9 First boundary surface of the recess / contact surface for the edge of another band

10 Third Band / New Band

1 1 Metallic strip / battery connector

12 Second boundary surface of the recess

13 Third boundary surface of the recess

α Angle of the first boundary surface to the perpendicular of the first surface of the band β Angle of the third boundary surface to the perpendicular of the second surface of the band b ₀ Width of the first surface to the recess

bi width of the second boundary surface

provided width of the first boundary surface in the plane of the first surface of the band bß width of the third boundary surface in the second surface of the band

hi height (thickness) bands in the area of the second boundary surface of the recess h _hs height (thickness) of the band LIST OF REFERENCE NUMBERS

1 Metallic band / outer band

2 Metallic band / outer band

3 Second metallic band / middle band made of other material

4 edge / edge remaining during profiling

5 edge / edge to be removed during profiling

6 First surface / surface into which the recess is formed

7 Second surface / plane parallel to the first surface

8 recess

10 Third Band / New Band

1 1 Metallic strip / battery connector

12 Second boundary surface of the recess

13 Third boundary surface of the recess α Angle of the first boundary surface to the perpendicular of the first surface of the band ß Angle of the third boundary surface to the perpendicular of the second surface of the band b ₀ Width of the first surface to the recess

bi width of the second boundary surface

boc width of the first boundary surface in the plane of the first surface of the band bß width of the third boundary surface in the second surface of the band i _! Height (thickness) bands in the area of the second boundary surface of the recess h _ges height (thickness) of the band

Claims

claims

1 . Method for producing a strip (10) from two different metals

and / or metallic alloys of tapes (1, 2, 3), in which the metals and / or the metallic alloys of the strip (10) are firmly joined together by roll-plating, characterized by the following, chronologically successive steps:

A) providing two first metallic bands (1, 2) and a second band (3) of another metal or another metallic alloy, wherein all bands (1, 2, 3) have four edges (4, 5), two to each other have parallel surfaces (6, 7) and an at least approximately rectangular cross-section,

B) profiling of the first bands (1, 2) starting from in each case one edge (5) into one of the mutually parallel surfaces (6), wherein in the profiling over the entire length of the first bands (1, 2) to be joined a recess (8) by removing material from the first strips (1, 2) and removing this edge (5) over the entire length to be joined,

C) positioning the bands (1, 2, 3) to each other, wherein the two first bands (1, 2) are arranged spaced from each other, the non-profiled surfaces (7) of the first bands (1, 2) are arranged in a plane next to each other and the recesses (8) of the first bands (1, 2) are arranged mirror-inverted and adjacent to each other, and wherein the second band (3) is disposed in the recesses (8) of the first bands (1, 2) adjacent or overlying second band (3) bridging the distance of the two first bands (1, 2) is arranged, and

D) joining the tapes (1, 2, 3) together by roll-plating the juxtaposed tapes (1, 2, 3), wherein by rolling plating a contiguous third tape (10) having two parallel faces is produced.

2. Method for producing a strip (10) from two different metals

A) providing two first metallic bands (1, 2) and a second band (3) of another metal or another metallic alloy, wherein all bands (1, 2, 3) have four edges (4, 5), two to each other have parallel surfaces (6, 7) and an at least approximately rectangular cross-section, B) profiling of the second band (3) starting from one edge (5) in each of the mutually parallel surfaces (6), said surface (6) connecting these two edges (5), wherein in the profiling over the entire Connecting length of the second band (3) two recesses (8) by removing material from the second band (3) arise and the two edges (5) on the whole to

connecting length by one of the two recesses (8) are removed,

C) positioning the bands (1, 2, 3) to each other, wherein the two first bands (1, 2) are arranged spaced from each other and the parallel surfaces (6, 7) of the first bands (1, 2) in a respective plane next to each other are arranged, and wherein the second band (3) is arranged on the first bands (1, 2) adjacent or resting, that the two first bands (1, 2) in a respective recess (8) of the second band (3) are arranged and that the second band (3), the distance between the two first bands (1, 2) is bridged, and

3. A method of making a tape (10) of two different metals

B) Profiling one of the first bands (1) and the second band (3) starting from one edge (5) into one of the mutually parallel surfaces (6), wherein during profiling over the entire length of the first band to be joined (1) and the second band (3) a recess (8) by removing material from the two bands (1, 3) is formed and this edge (5) is removed over the entire length to be joined,

C) positioning the bands (1, 2, 3) to each other, wherein the two first bands (1, 2) are arranged spaced from each other, the parallel surfaces (6, 7) of the first bands (1, 2) in a plane next to each other be arranged, and wherein the second band (3) is placed in the recess (8) of the profiled first band (1) adjacent or resting, the non-profiled first band (2) in the recess (8) of the second band (3) is arranged and the second band (3) bridging the distance between the two first bands (1, 2), and

4. The method according to any one of the preceding claims, characterized in that the generating of the two recesses (8) during profiling with a

Machining takes place, preferably by milling.

5. The method according to any one of the preceding claims, characterized in that each band (1, 2, 3) consists of only one metal or a metallic alloy, wherein preferably the two first bands (1, 2) made of the same metal or consist of the same metallic alloy.

6. The method according to any one of the preceding claims, characterized in that the material of which the bands (1, 2, 3) consist is selected from copper, aluminum, aluminum-based alloys and / or copper-based alloys.

7. The method according to any one of the preceding claims, characterized in that when joining the bands (1, 2, 3) with each other by roll-plating the bands (1, 2, 3) are formed, wherein the height of the generated third band (10) less is the height of the first bands (1, 2) and the second band (3).

8. The method according to claim 7, characterized in that during the forming of the bands (1, 2, 3) heat is supplied and the height of the generated third band (10) is at least 20% less than the height of the three output bands (1 , 2, 3).

9. The method according to claim 7, characterized in that during the forming of the bands (1, 2, 3) no heat is supplied and the height of the generated third band (10) is at least 40% less than the height of the three output bands ( 1, 2, 3).

10. The method according to any one of the preceding claims, characterized in that the heights of the two first bands (1, 2) and the second band (3) are between 0.5 mm and 5 mm and after the roll-plating the generated third band (10 ) has a height of 0.1 mm to 2 mm, wherein the height of the generated third band (10) is less than the height of the first bands (1, 2) and the second band (3).

1 1. Method according to one of the preceding claims, characterized in that the two first bands (1, 2) have a width between 10 mm and 100 mm and the second band (3) is at least as wide as the first bands (1, 2) and up to three times as wide as the first bands (1, 2).

12. The method according to any one of the preceding claims, characterized in that when profiling the two bands (1, 3) or (1, 2) or the second band (3) initially a non-profiled strip (1, 2, 3) of a Role is unwound, the

Recess (8) is produced by a subtractive process, preferably with a machining technique or a milling technique is generated, and the profiled strip (1, 2, 3) is then wound up again into a roll.

13. The method according to any one of the preceding claims, characterized in that when profiling the two bands (1, 3) or (1, 2) or the second band (3) initially a non-profiled strip (1, 2, 3) of a Role is unwound, the

14. The method according to any one of the preceding claims, characterized in that each profiled strip (1, 2, 3) having at least one recess (8), at least along the length to be joined has the same cross-section.

15. The method according to any one of the preceding claims, characterized in that each of the two recesses (8) having a first, a second and a third planar boundary surface (9, 12, 13) is generated, wherein the first boundary surface (9) and the third boundary surface (13) to the surface (6) of the belt (1, 2, 3) in which the recess (8) is produced or the recesses (8) are generated to be inclined towards the second boundary surface (12) is generated parallel to the plane of this surface (6) of the band (1, 2, 3), so that the parallel second

Boundary surface (12) between the two inclined boundary surfaces (9, 13) is arranged and the first boundary surface (9) adjacent to the surface (6) of the band (1, 2, 3), in which the recess (8) is generated or the recesses (8) are generated.

16. The method according to claim 15, characterized in that the recess (8) is generated such that the angle () of the first boundary surface (9) to the solder of the surface (6) of the band (1, 2, 3), in the the recess (8) is produced or the recesses (8) are generated, lies between 7 ° and 25 °, preferably between 15 ° and 20 °, and the angle (13) of the third boundary surface (13) for soldering the surface (6) of the strip (1, 2, 3) in which the recess (8) is produced or the recesses (8) are generated, between 20 ° and 60 °, preferably between 30 ° and 45 °.

17. The method according to claim 15 or 16, characterized in that the recess (8) is produced such that the width (b1) of the second boundary surface (12) is between 2 mm and 10 mm.

18. The method according to any one of claims 15 to 17, characterized in that the

Recess (8) is generated such that the distance (h1) of the second

Boundary surface (12) of the non-deformed surface (7) of the band (1, 2, 3) between 60% and 20% of the height (hges) of the belt (1, 2, 3) without the recess (8) corresponds, preferably between 25% and 40%.

19. The method according to any one of the preceding claims, characterized in that the distance of the two first bands (1, 2) is adjusted such that the edges (4) of the recesses (8) adjacent bands (1, 2, 3) on inclined

Resting boundary surfaces (9, 13) of the recesses (8), preferably on the first boundary surfaces (9) of the recesses (8) abut.

20. A process for producing a plurality of strips (1 1) of two different metals

and / or metallic alloys of tapes (1, 2, 3) in which the metals and / or metallic alloys are firmly joined together by roll-bonding, the strips (11) being made from a strip (10) which is joined to the method steps according to one of the preceding claims, wherein after the production of the third band (10) the following method step takes place:

E) the thus produced third band (10) is separated into strips (1 1).

21. A method according to claim 20, characterized in that with the method

a plurality of battery connectors (10) or accumulator connectors (10) are manufactured.

22. The method according to any one of claims 20 or 21, characterized in that the separating of the generated third band (10) by cutting or punching in

Longitudinal direction of the third band (10) in the metal or metallic alloy of the second band (3) and the strips (1 1) are then produced by parallel cuts or parallel punches perpendicular or diagonal to the longitudinal direction of the third band (3).

23. The method according to any one of claims 20 to 22, characterized in that in

Process step E), the generated third band (10) in strips (1 1) is separated, the respectively exactly one compound of two different materials of a first band (1, 2) and the second band (3), wherein the region of the third band (10), which was generated from the second band (3) is separated and perpendicular or Diagonal to several separations for the production of the strips (1 1) take place.

24. Use of metallic strips (1 1) produced by a method according to any one of claims 20 to 23 for the electrical contacting of at least two

Battery elements or at least two galvanic elements.

25. Method for producing a stamped grid of two or three different ones

Metals and / or metallic alloys of tapes (1, 2, 3), in which the metals and / or metallic alloys are firmly bonded together by roll-bonding, wherein the punched grid is produced from a strip (10), according to the method steps one of claims 1 to 19, wherein after the production of the third strip (10) the following method step takes place:

E) the thus produced third band (10) is formed by punching out areas of the third band (10) in the stamped grid.

26. Metallic strip (1 1) consisting of two different metals and / or

Metal alloys produced by a method according to any one of claims 20 to 23.

27. Metallic band (10) consisting of at least two different metals

and / or metal alloys prepared by a method according to any one of claims 1 to 19.

28. punched grid consisting of two or three different metals and / or

Metal alloys produced by a process according to claim 25.

29. Battery having a plurality of battery elements or a plurality of galvanic cells, wherein the battery elements or galvanic cells with metallic strips (1 1) are electrically connected according to claim 26.

30. Battery according to claim 29, characterized in that the battery elements or the galvanic cells with the strips (1 1) are electrically connected.