Current measuring assembly, method for producing such a current measuring assembly, and adjustment system for such a current measuring assembly

Abstract

The invention relates to a current measuring assembly (1) for measuring an electric current (I), comprising a low-ohmic current measuring resistor (2) having two connection parts (3, 4), which are made of a conductor material, for introducing or discharging the current (I) and a resistor element (5), which is made of a resistor material, between the connection parts and comprising a printed circuit board (8), which is electrically and mechanically connected to the current measuring resistor (2) and has voltage taps (9-12) in order to measure the voltage at the connection parts (3, 4), measuring lines branching off from the voltage taps (9-12). According to the invention, at least one of the measuring lines has an interruption (21-24), which electrically separates two contact points (13-16, 17-20) from each other, and a freely positionable jumper (26-29), which is made of a conductor material, electrically bridges the interruption (21-24) and electrically connects the two contact points (13-16, 17-20) to each other. The invention further relates to a method for producing such a current measuring assembly (1) and to an adjustment system for same.

Description

[0001] DESCRIPTION

[0002] Current measuring arrangement and manufacturing method and adjustment system for such a current measuring arrangement

[0003] Technical field of the invention

[0004] The invention relates firstly to a current measuring arrangement for measuring an electric current by means of a low-ohm current measuring resistor ("shunt"). Furthermore, the invention relates to a calibration system for calibrating the temperature coefficient (TK) of the resistance value of such a current measuring resistor. Finally, the invention also relates to a manufacturing method for a current measuring arrangement according to the invention with a low-ohm current measuring resistor.

[0005] Background of the invention

[0006] It is known from the prior art (e.g., EP 0 605 800 A1) to measure an electric current using a low-resistance current measuring resistor according to the four-wire technique. The electric current to be measured is passed through the low-resistance current measuring resistor, and the voltage drop across the low-resistance current measuring resistor is measured and, according to Ohm's law, is a measure of the electric current.

[0007] It is also known from the prior art (e.g., DE 10 2009 031 408 A1) to arrange a circuit board on such a low-resistance current measuring resistor, wherein the circuit board is electrically and mechanically connected to the low-resistance current measuring resistor. In this case, measuring electronics (e.g., ASIC - Application-Specific Integrated Circuit) are arranged on the circuit board to measure the voltage drop across the low-resistance current measuring resistor. For this purpose, the circuit board has two voltage taps that engage the two terminals of the low-resistance current measuring resistor in order to measure the voltage drop across the resistance element of the low-resistance current measuring resistor.

[0008] The problem with the current measurement described above according to the four-wire technique using a low-ohm current measuring resistor is the fact that the temperature coefficient (TK) of the resistance value of the low-ohm current measuring resistor is subject to component variations, which leads to corresponding measurement errors.

[0009] Regarding the technical background of the invention, reference should also be made to WO 2023 / 135977 A1. This publication discloses a current measuring arrangement with a current measuring resistor and a circuit board, wherein several measuring lines are arranged on the circuit board in order to measure the voltage drop across the resistance element of the current measuring resistor at various voltage measuring points. The desired voltage measuring point is selected by placing a jumper (contact bridge) in the interruption of the desired measuring lines. However, this method only allows for a stepped and therefore very inaccurate adjustment of the current measuring resistor, so that component variations can only be compensated for very imprecisely.

[0010] Description of the invention

[0011] The invention is therefore based on the object of solving the problem of component scattering of the temperature coefficient of the resistance value of the low-ohm current measuring resistor in current measurement according to the four-wire technique.

[0012] This object is achieved by a current measuring arrangement according to the invention, a corresponding adjustment system or a manufacturing method according to the independent claims.

[0013] The current measuring arrangement according to the invention, in accordance with the known current measuring arrangement described above, firstly comprises a low-ohm current measuring resistor ("shunt"). The low-ohm current measuring resistor has two connection parts made of a conductor material (e.g., copper) for introducing the current to be measured into the current measuring resistor and for discharging the electrical current to be measured from the current measuring resistor. In addition, the current measuring resistor according to the invention has a resistance element made of a resistance material (e.g., Manganin®), wherein the resistance element is arranged between the two connection parts in the current flow direction, so that the electrical current to be measured flows through the resistance element during operation. Such a low-ohm current measuring resistor is known, for example, from EP 0 605 800 A1 and therefore need not be described in more detail.

[0014] Furthermore, the current measuring arrangement according to the invention, in accordance with the prior art described at the outset (e.g. DE 10 2009 031 408 A1), also comprises a printed circuit board that is electrically and mechanically connected to the current measuring resistor and can, for example, carry measuring electronics to measure the voltage drop across the low-ohm current measuring resistor. For this purpose, the printed circuit board has two voltage taps, each with a contact surface made of a conductor material (e.g. copper), for contacting the two connection parts of the low-ohm current measuring resistor. The two contact surfaces for contacting the low-ohm current measuring resistor are preferably arranged on the underside of the printed circuit board facing the current measuring resistor and are connected to the top side of the printed circuit board via vias.

[0015] Measuring lines extend from the two voltage taps, which can lead to an evaluation electronics (e.g. ASIC: Application-specific integrated circuit), as is the case with the state of the art.

[0016] The invention is characterized in that an interruption is arranged in at least one of the measuring lines, which electrically separates two contact points from each other. The interruption in the respective measuring line is electrically bridged by a jumper (contact bridge), whereby the jumper electrically connects the two contact points. It is important that the jumper can be positioned in different positions above the interruption between the adjacent contact points in order to calibrate the current measuring arrangement, for example with regard to the temperature coefficient of the resistance value. This also distinguishes the invention from the publication WO 2023 / 135977 A1 mentioned at the beginning, in which the jumpers can only be positioned at specific positions in the interruptions in the measuring lines.Within the scope of the invention, the disturbing component scattering can be compensated by a suitable positioning of the jumper.

[0017] Preferably, the jumpers in the respective interruptions can be positioned continuously in different positions, which enables a correspondingly continuous adjustment of the current measuring resistor.

[0018] In a preferred embodiment of the invention, the two contact points consist of a conductor material (e.g., copper) and are designed, for example, as solder pads. The jumper is electrically and mechanically connected to the two contact points, for example, by bonding wires or by soldering or welding. In the preferred embodiment of the invention, the two contact points are each elongated and run alongside each other, so that the two elongated contact points enclose the interruption between them. The jumper can be positioned in different positions along the elongated contact points.For example, the two contact points can be designed as rectangular solder pads that run parallel to each other and enclose the interruption between them, wherein the elongated contact points are preferably each aligned transversely to the main current flow direction in the current measuring resistor.

[0019] In the current measuring arrangement according to the invention, more than two voltage taps can be provided to measure the voltage at the terminals of the current measuring resistor. For example, a total of four voltage taps can be provided, wherein the individual voltage taps can each be designed in the manner described above, i.e., with a measuring line with two contact points, an interruption between the contact points, and a jumper connecting the two contact points.

[0020] In the current measuring arrangement according to the invention, the voltage taps are preferably each arranged on the underside of the circuit board facing the current measuring resistor, whereas the at least one interruption with the jumper is arranged on the top side of the circuit board facing away from the current measuring resistor. The arrangement of the jumpers on the top side of the circuit board facing away from the current measuring resistor is advantageous because the top side of the circuit board is easily accessible even after the circuit board has been connected to the current measuring resistor, thus enabling simple positioning of the jumper. The voltage taps on the underside of the circuit board can be connected to the respective interruption on the top side of the circuit board by a via in the circuit board.

[0021] Furthermore, in the current measuring resistor according to the invention, so-called current shadows (cuts) can be arranged in the connection parts of the current measuring resistor in order to influence the current density in the current measuring resistor. For example, two such current shadows can be arranged in each of the two connection parts, each consisting of a cut in the connection part extending from a side edge of the respective connection part.

[0022] The individual incisions preferably have the same depth transverse to the long side edge of the current measuring resistor. However, it is also possible within the scope of the invention for the individual incisions (current shadows) to have different depths transverse to the long side edge of the current measuring resistor. Furthermore, it is also possible within the scope of the invention for the circuit board to have an incision that runs transverse to the direction of current flow. This makes it possible for at least one of the voltage taps on the circuit board to surround a side edge of the circuit board in the region of the incision in a cap-like manner. The incision in the circuit board can have a width along the direction of current flow that is equal to the width of the resistance element, greater than the width of the resistance element, or smaller than the width of the resistance element along the direction of current flow.

[0023] In general, it should be noted that the conductor material of the connection parts of the low-ohm current measuring resistor or the contact surfaces of the circuit board preferably has a lower specific electrical resistance than the resistance material of the resistance element.

[0024] For example, the conductor material can be copper, a copper alloy, aluminum or an aluminum alloy.

[0025] Furthermore, it should be mentioned in general that the connecting parts and the resistance element as well as the complete current measuring resistor are preferably plate-shaped, as is also known from the prior art.

[0026] The current measuring resistor is preferably low-ohmic and preferably has a very small resistance value, which is preferably less than 1 Q, 500 mQ, 250 mQ, 100 mQ, 50 mQ, 20 mQ, 10 mQ, 5 mQ, 2 mQ, 1 mQ, 500 pQ, 250 pQ, 100 pQ or 50 pQ.

[0027] In addition, it should generally be mentioned that the conductor material has a specific electrical resistance that is preferably less than 10' 6 Om or 10' 7 Om.

[0028] The resistance material of the resistance element, on the other hand, preferably has a specific electrical resistance that is less than 10' 4 Om, 10' 5 Om or 10' 6 Om.

[0029] As already mentioned above, a resistance alloy can be used as the resistance material for the resistance element of the low-ohm current measuring resistor. For example, this can be a copper-manganese-nickel alloy, in particular CuMnl2Ni or CuMnNi 25-10. Alternatively, a copper-nickel alloy, in particular CuNi44, can be used. Furthermore, a nickel-chromium alloy, in particular NiCRbOAISi or NiCr3020, can also be used. However, the above-mentioned examples of resistance alloys are merely exemplary and do not limit the scope of protection.

[0030] Furthermore, it should be mentioned that the resistance element can be connected to the connecting parts by a welded joint, in particular by electron beam welding.

[0031] Furthermore, it should be noted that the circuit board may have an interface to output the measured voltage drop across the resistive element.

[0032] Furthermore, the circuit board can carry a measuring circuit which is connected to the voltage taps on the connection parts of the current measuring resistor in order to measure the voltage drop across the current measuring resistor.

[0033] As mentioned above, the positioning of the jumpers allows for adjusting the temperature coefficient of the resistance of the low-ohm current-sense resistor. To achieve this, the jumpers are preferably positioned so that the temperature coefficient (TC) of the resistance of the current-sense resistor is less than ±500 ppm / K, 250 ppm / K, ±100 ppm / K, ±50 ppm / K, ±25 ppm / K, ±10 ppm / K, or ±5 ppm / K.

[0034] Furthermore, within the scope of the invention, it is possible for a trim cut to be introduced into the resistance element of the current measuring resistor in order to adjust the resistance value of the current measuring resistor.

[0035] In addition, a through hole can be arranged in the first connection part and / or in the second connection part for electrical and mechanical contacting, as is also known, for example, from EP 0 605 800.

[0036] Furthermore, it's generally worth mentioning that the conductor material for one of the two terminals can be copper or a copper alloy, while the conductor material for the other terminal is aluminum or an aluminum alloy. The terminals of the current measuring resistor can therefore be made of different conductor materials.

[0037] In addition to the current measuring arrangement according to the invention described above, the invention also claims protection for a manufacturing method for producing such a current measuring device. The individual method steps of the manufacturing method according to the invention are already apparent from the above description of the current measuring arrangement according to the invention, so a separate description of the individual method steps is unnecessary.

[0038] Within the scope of the manufacturing method according to the invention, the jumpers are preferably first provisionally positioned in a specific position in the interruption, thereby establishing an electrical connection between the adjacent contact points. The temperature coefficient of the resistance value of the current measuring resistor is then measured with the provisionally positioned jumper and compared with a predetermined tolerance range. If the determined actual temperature coefficient is not within the predetermined tolerance range, the jumper in the interruption is repositioned to improve the temperature coefficient. These steps are then repeated until the temperature coefficient is within the predetermined tolerance range. The jumper can then be finally mounted in the interruption at the thus determined position, for example by soldering or welding.

[0039] It was mentioned above that the positioning of the jumpers serves to adjust the current measuring arrangement, for example, with regard to the temperature coefficient of the resistance value. However, within the scope of the invention, it is also possible for the positioning of the jumpers to serve a different purpose. For example, the circuit board can be a universal circuit board suitable for various types of current measuring resistors. The jumpers are then positioned depending on the type of current measuring resistor in order to adapt the universal circuit board to the respective type of current measuring resistor.

[0040] For example, the appropriate position of the jumpers can be read out from a database depending on the type of current measuring resistor, whereby the appropriate position of the jumpers is stored in the database for the different types of current measuring resistors.

[0041] Finally, the invention also claims protection for a balancing system for producing the current measuring arrangement according to the invention. Thus, the balancing system according to the invention first comprises the current measuring arrangement according to the invention described above. Furthermore, the balancing system according to the invention preferably also comprises a current source for energizing the current measuring resistor with an electric current. Furthermore, the balancing system according to the invention preferably comprises a temperature control device for energizing the current measuring resistor to a predetermined temperature. Furthermore, the balancing system according to the invention also comprises a voltage measuring device for measuring the voltage drop across the resistance element of the current measuring resistor during energization by the current source and at the temperature set by the temperature control device.Furthermore, the correct calibration system preferably also includes an evaluation device for determining the appropriate position of the jumper depending on the electrical current, the specified temperature, and the measured voltage drop across the resistance element of the current measuring resistor. Finally, the calibration system according to the invention preferably also includes a placement device for assembling the circuit board with at least one jumper at the determined position.

[0042] Other advantageous developments of the invention are characterized in the subclaims or are explained in more detail below together with the description of the preferred embodiments of the invention with reference to the figures.

[0043] Brief description of the drawings

[0044] Figure 1 shows a plan view of a current measuring arrangement according to the invention with a low-ohm current measuring resistor and a circuit board connected thereto.

[0045] Figure 2 shows a flow chart to illustrate the adjustment of the temperature coefficient of the current measuring resistor by appropriate positioning of the jumpers on the circuit board.

[0046] Figure 3 shows a modification of Figure 2.

[0047] Figure 4 shows a schematic representation of an adjustment system according to the invention.

[0048] Figure 5 shows a flow chart for adapting a universal circuit board to the respective type of current measuring resistor by appropriate positioning of the jumpers.

[0049] Figure 6A shows a perspective view of a modified current measuring arrangement with a cutout in the circuit board. Figure 6B shows a sectional view through the current measuring arrangement according to Figure 6A.

[0050] Figure 7 shows a modification of Figure 6B.

[0051] Figure 8 shows a further modification of Figure 6B.

[0052] Detailed information

[0053] In the following, the embodiment of a current measuring arrangement 1 according to the invention shown in Figure 1 will first be described, which serves to measure an electrical current I, as is basically known from the prior art.

[0054] For this purpose, the current measuring arrangement 1 initially has a low-ohmic current measuring resistor 2, which is also referred to as a "shunt". The current measuring resistor 2 has two plate-shaped connecting parts 3, 4 made of a conductor material (e.g. copper) in order to introduce the electrical current I to be measured into the current measuring resistor 2 or to discharge it again from the current measuring resistor 2.

[0055] In the direction of current flow between the two connecting parts 3, 4 there is arranged a resistance element 5 which is also plate-shaped and consists of a low-ohmic resistance alloy and is connected to the two connecting parts 3, 4 by welds 6, 7.

[0056] The electrical current I to be measured is thus introduced into the current measuring resistor 2 at the plate-shaped connection part 3, then flows through the resistance element 5 and is then led out of the current measuring resistor 2 again via the other plate-shaped connection part 4.

[0057] On the top side of the current measuring resistor 2, a printed circuit board 8 is arranged, which is electrically and mechanically connected to the current measuring resistor 2, as is known per se from the prior art.

[0058] On its underside, the printed circuit board 8 has several voltage taps 9-12 for measuring the voltage at the two connection parts 3, 4. The voltage taps 9-12 are each connected to solder pads 13-16 on the top side of the printed circuit board 8 by means of vias in the printed circuit board 8.

[0059] In addition, corresponding solder pads 17-20 are arranged on the top side of the circuit board 8, which are each separated from the solder pads 13-16 by an interruption 21-24.

[0060] The solder pads 17-20 are in turn connected to an interface 25 by measuring lines in order to transmit the measured voltage to a measuring electronics.

[0061] The interruptions 17-20 between the solder pads 13-16 on the one hand and the solder pads 17-20 on the other hand are bridged by jumpers 26-90, whereby the jumpers 26-29 can be arranged at different positions within the interruptions 17-20 in order to adjust the temperature coefficient of the current measuring arrangement 1.

[0062] In addition, the drawing shows two notches 30, 31 in the plate-shaped connecting part 3 and two further notches 32, 33 in the other connecting part 4. These notches 30-33 are also referred to as current shadows and serve to influence the current density in the current measuring resistor 2.

[0063] The flow chart shown in Figure 2 is now described below to illustrate the adjustment method according to the invention.

[0064] In a first step S1, the current measuring resistor is first heated to a temperature T A =+20°C temperate.

[0065] In the next step S2, the current measuring resistor is then supplied with a measuring current 1=1 MESS.

[0066] In the next step S3, it is then intended that the voltage drop U A across the current measuring resistor, ie at temperature T A =+20°C.

[0067] In the next step S4, it is then provided that the resistance value R A = U A / IMESS is calculated.

[0068] The steps S1-S4 are then repeated in the following steps S5-S8, but for a different temperature T B >+20°C. In the next step S9, the appropriate position of the jumpers along the interruptions is calculated depending on the two temperatures T A , T B and the two resistance values ​​RA, RB.

[0069] In the next step S10, the jumpers are then soldered to the determined position.

[0070] Figure 3 shows a modification of the flow chart according to Figure 1, so that in order to avoid repetition, reference is again made to the above description.

[0071] A special feature of this embodiment is that the process is repeated iteratively until the temperature coefficient is within an acceptable range. If this is not the case, the jumper is repositioned in step S12, and this process is repeated until the temperature coefficient is within the specified acceptable range.

[0072] Figure 4 shows a highly simplified schematic representation of a balancing system according to the invention with the current measuring arrangement 1 described above. In addition, the balancing system has a current source 34 in order to be able to supply current to the current measuring resistor 2 during a balancing process.

[0073] In addition, the adjustment system has a tempering device 35 to temper the current measuring resistor 2 during the adjustment process, as described above.

[0074] Furthermore, the adjustment system according to the invention has a voltage measuring device 36 in order to be able to measure the voltage across the current measuring resistor 2.

[0075] Furthermore, the adjustment system according to the invention has an evaluation unit 37 which calculates the appropriate position of the jumpers required to adjust the temperature coefficient of the resistance value of the current measuring resistor 2.

[0076] A placement device 38 then populates the circuit board with the jumpers at the appropriate position.

[0077] Figure 5 shows a flow chart illustrating the adaptation of a universal printed circuit board to a specific type of current sense resistor.

[0078] In a first step S1, a universal circuit board is provided which is basically suitable for different types of current measuring resistors.

[0079] In the next step S2, a current measuring resistor of a specific type is then provided.

[0080] The next step S3 then involves mechanically and electrically connecting the universal circuit board to the current measuring resistor.

[0081] A step S4 then provides for the type of current measuring resistor to be determined.

[0082] In the next step (S5), the appropriate jumper position required to adapt the universal circuit board to the respective current-sense resistor type is determined. For example, the appropriate jumper position can be read from a database depending on the current-sense resistor type.

[0083] In the next step S6, the jumpers are then soldered in the appropriate position to adapt the universal circuit board to the respective type of current measuring resistor.

[0084] The modified embodiment shown in Figures 6A and 6B will now be described. This modified embodiment largely corresponds to the previously described embodiments, so that, to avoid repetition, reference is made to the above description, with the same reference numerals being used for corresponding details.

[0085] A special feature of this embodiment is that the circuit board 3 has a notch 39 that runs across the resistance element 8, perpendicular to the current flow direction. This exposes the side edges of the circuit board 8 above the resistance element 5. The two solder pads 18, 20 each encompass the side edges of the circuit board 8 in the region of the notch 39 in a cap-like manner.

[0086] Figure 6B further shows that the notch 39 in the circuit board 8 has a width along the current flow direction that is smaller than the width of the resistance element 5 along the current flow direction. Figure 7 shows a modification of the sectional view according to Figure 6B, wherein the width of the notch 39 in the circuit board 8 is essentially equal to the width of the resistance element 8 along the current flow direction.

[0087] Figure 8 shows a further modification of the sectional view according to Figure 6B, wherein the width of the notch 39 in the circuit board 8 is greater than the width of the resistance element 5 along the current flow direction.

[0088] The invention is not limited to the preferred embodiments described above. Rather, the invention allows for numerous modifications that also utilize the inventive concept and therefore fall within the scope of protection. In particular, the invention also claims protection for the subject matter and features of the subclaims, independent of the respective claims referred to. The invention thus encompasses various aspects of the invention that enjoy independent protection.

[0089] List of reference symbols

[0090] 1 current measuring arrangement

[0091] 2 Current measuring resistor ("shunt")

[0092] 3 Connection part made of a conductor material for introducing the current into the current measuring resistor

[0093] 4 Connection part made of a conductor material for conducting the current from the current measuring resistor

[0094] 5 resistance element made of a resistance material

[0095] 6 Weld seam between the resistance element and the connection part for introducing the current into the current measuring resistor

[0096] 7 Weld seam between the resistance element and the connection part for discharging the current from the current measuring resistor

[0097] 8 circuit board

[0098] 9-12 voltage taps on the underside of the circuit board

[0099] 13-16 solder pads on the top of the circuit board

[0100] 17-20 solder pads on the top of the circuit board

[0101] 21-24 breaks between the solder pads

[0102] 25 Interface on the circuit board 26-29 Jumper (contact bridge) for bridging the interruptions and for electrically connecting the solder pads

[0103] 30, 31 Cutouts (“current shadow”) in the connection part for introducing the current into the current measuring resistor 32, 33 Cutouts (“current shadow”) in the connection part for leading the current out of the

[0104] Current measuring resistor

[0105] 34 Power source

[0106] 35 Tempering device

[0107] 36 Voltage measuring device 37 Evaluation unit

[0108] 38 assembly device

[0109] 39 Cut in the circuit board

[0110] I Electric current

Claims

CLAIMS 1. Current measuring arrangement (1) for measuring an electrical current (I), comprising a) a low-ohmic current measuring resistor (2) with a1) a first connection part (3) made of a conductor material for introducing the electrical current (I) to be measured into the current measuring resistor (2), a2) a second connection part (4) made of a conductor material for conducting the electrical current (I) from the current measuring resistor (2), and a3) a resistance element (5) made of a resistance material, wherein the resistance element (5) is arranged between the first connection part (3) and the second connection part (4) in the current flow direction and is traversed by the electrical current (I) to be measured during operation, and b) a printed circuit board (8) which is electrically and mechanically connected to the current measuring resistor (2), with b1) a first voltage tap (9) for measuring the voltage at the current measuring resistor (2), in particular at the first connection part (3) of the current measuring resistor (2),and b2) a second voltage tap (11) for measuring the voltage at the current measuring resistor (2), in particular at the second connection part (4) of the current measuring resistor (2), and b3) a first measuring line which originates from the first voltage tap (9), and b4) a second measuring line which originates from the second voltage tap (11), b5) wherein the first measuring line and / or the second measuring line has an interruption (21-, 24) which electrically separates two contact points (13-16, 17-20) from one another, and b6) a jumper (26-29) made of a conductor material which electrically bridges the interruption (21-24) and electrically connects the two contact points (13-16, 17-20) to one another, characterized in that c) the jumper (26-29) can be positioned in different positions above the interruption (21-24), in particular continuously.

2. Current measuring arrangement (1) according to claim 1, characterized in that a) the two contact points (13-16, 17-20) consist of a conductor material, in particular as solder pads, and b) that the jumper (26-29) is electrically and mechanically connected to the two contact points (13-16, 17-20), in particular by bonding wires or by material bonding by soldering or welding.

3. Current measuring arrangement (1) according to claim 2, characterized in that a) the two contact points (13-16, 17-20) are each elongated and run next to one another, so that the two elongated contact points (13-16, 17-20) enclose the interruption (21-24) between them, b) that the jumper (26-29) can be positioned in different positions along the elongated contact points (13-16, 17-20).

4. Current measuring arrangement (1) according to claim 2 or 3, characterized in that a) the two contact points (13-16, 17-20) are each rectangular, and / or b) that the two elongated contact points (13-16, 17-20) are each aligned transversely to the main current flow direction in the current measuring resistor (2).

5. Current measuring arrangement (1) according to one of the preceding claims, characterized by a) a third voltage tap (10) for measuring the voltage at the current measuring resistor (2), b) a third measuring line which originates from the third voltage tap (10), c) a third interruption (22) in the third measuring line, wherein the third interruption (22) electrically separates two contact points (14, 18) from one another, d) a third jumper (27) made of a conductor material which electrically connects the two contact points (14, 18) in the third measuring line, wherein the third jumper (27) can be positioned in different positions in the third interruption (22), e) a fourth voltage tap (12) for measuring the voltage at the current measuring resistor (2), f) a fourth measuring line which originates from the fourth voltage tap (12), g) a fourth interruption (24) in the fourth measuring line, wherein the fourth interruption (24) has two contact points (16,20) electrically separates them, and h) a fourth jumper (29) made of a conductor material, which electrically connects the two contact points (16, 20) in the fourth measuring line, wherein the fourth jumper (29) can be positioned in different positions in the fourth interruption (24).

6. Current measuring arrangement (1) according to one of the preceding claims, characterized in that a) the voltage taps (9-12) are each arranged on the underside of the circuit board (8) facing the current measuring resistor (2), b) the at least one interruption (21-24) with the jumper (26-29) is arranged on the upper side of the circuit board (8) facing away from the current measuring resistor (2), and c) the voltage taps (9-12) on the underside of the circuit board (8) are each connected to the respective interruption (21-24) on the upper side of the circuit board (8) by a through-hole in the circuit board (8).

7. Current measuring arrangement (1) according to one of the preceding claims, characterized by a) a first notch (30) in the first connection part (3) of the current measuring resistor (2) for influencing the current density in the current measuring resistor (2), and / or b) a second notch (32) in the second connection part (4) of the current measuring resistor (2) for influencing the current density in the current measuring resistor (2), and / or c) a third notch (31) in the first connection part (3) of the current measuring resistor (2) for influencing the current density in the current measuring resistor (2), and / or d) a fourth notch (33) in the second connection part (4) of the current measuring resistor (2) for influencing the current density in the current measuring resistor (2).

8. Current measuring arrangement (1) according to claim 7, characterized in that a) the at least one incision (31-33) starts from a longitudinal side edge of the current measuring resistor (2), and / or b) that the incisions (31-33) have the same depth or a different depth transversely to the longitudinal side edge.

9. Current measuring arrangement (1) according to one of the preceding claims, characterized in that a) the printed circuit board (8) has a notch (39) which runs transversely to the current flow direction, and / or b) at least one of the contact points (13-20) surrounds a side edge of the printed circuit board (8) in a cap-like manner, in particular on a side edge to the notch (39), and / or c) the notch (39) in the printed circuit board (8) has a width along the current flow direction which cl) equal to the width of the resistance element (5) along the current flow direction, c2) greater than the width of the resistance element (5) along the current flow direction or c3) smaller than the width of the resistance element (5) along the current flow direction.

10. Current measuring arrangement (1) according to one of the preceding claims, characterized in that a) the conductor material has a lower specific electrical resistance than the resistance material of the resistance element (5), and / or b) the conductor material is copper, a copper alloy, aluminum or an aluminum alloy, and / or c) the first connection part (3) and / or the second connection part (4) and / or the resistance element (5) is plate-shaped, in particular in the form of a flat or curved plate, and / or d) the current measuring resistor (2) has a resistance value that is less than 1 Ω, 500 mΩ, 250 mΩ, 100 mΩ, 50 mΩ, 20 mΩ, 10 mΩ, 5 mΩ, 2 mΩ, 1 mΩ, 500 Ω, 250 Ω, 100 Ω or 50 Ω, and / or e) the conductor material has a specific electrical resistance that is less is 10' 6 Om or 10' 7Om, and / or f) that the resistance material of the resistance element (5) has a specific electrical resistance which is less than 10' 4 Om, 10' 5 Om or 10' 6Om, and / or g) that the resistance material is a resistance alloy, in particular g1) a copper-manganese-nickel alloy, in particular CuMnl2Ni or CuMnNi 25-10, g2) a copper-nickel alloy, in particular CuNi44 or g3) a nickel-chromium alloy, in particular NiCRbOAISi, NiCr3020, and / or h) that the resistance element (5) is connected to the connection parts (3, 4) by a welded connection, in particular by electron beam welding, and / or i) that the printed circuit board (8) has an interface (25) to output the measured voltage drop across the resistance element (5), and / or j) that the printed circuit board (8) carries a measuring circuit which is connected to the measuring lines for measuring the voltage drop across the current measuring resistor (2), and / or k) that the at least one jumper is positioned over the interruption such that the temperature coefficient of the resistance value of the current measuring resistor (2) is less than ±500 ppm / K, 250 ppm / K, ±100 ppm / K, ±50 ppm / K, ±25 ppm / K, ±10 ppm / K or ±5 ppm / K, and / or l) that a trim cut is made in the resistance element (5) of the current measuring resistor (2) in order to set the resistance value of the current measuring resistor (2), and / or m) that a through hole is arranged in the first connection part (3) and / or in the second connection part (4) for electrical and mechanical contact, and / or n) that the conductor material in one of the two connection parts is copper or a copper alloy, while the conductor material in the other connection part is aluminum or an aluminum alloy, and / or o) that the individual voltage taps each have a plurality of spatially separated measuring points.

11. A manufacturing method for a current measuring arrangement (1), in particular for a current measuring arrangement (1) according to one of the preceding claims, comprising the following steps: a) providing a current measuring resistor (2) with two connection parts (3, 4) made of a conductor material and a resistance element (5) made of a resistance material, wherein the resistance element (5) is arranged between the connection parts (3, 4) in the current flow direction and is traversed by the electrical current (I) to be measured during operation, b) providing a printed circuit board (8) with voltage taps (9-12) for measuring the voltage at the current measuring resistor (2) and measuring lines extending from the voltage taps, wherein an interruption (21-24) is provided in at least one of the measuring lines, which electrically separates two contact points (13-20) from one another, and c) electrically and mechanically connecting the printed circuit board (8) to the current measuring resistor (2),so that the voltage taps (9-12) of the printed circuit board (8) measure the voltage at the current measuring resistor (2), in particular at the connection parts (3, 4) of the current measuring resistor (2), characterized in that d) a jumper (26-29) can be positioned in different positions above the interruption (21-24), in particular continuously.

12. Manufacturing method according to claim 11, characterized by the following steps: a) Preliminary positioning of the jumper (26-29) at a position in the interruption (21- b) Determine the temperature coefficient of the resistance value of the current measuring resistor (2) with the provisionally positioned jumper (26-29), c) comparing the determined temperature coefficient with a predetermined tolerance range, d) repositioning the jumper (26-29) in the interruption (21-24) if the determined temperature coefficient is not within the predetermined tolerance range, and e) repeating steps b) to d) until the determined temperature coefficient is within the predetermined tolerance range, and f) finally fixing the jumper (26-29) in the interruption (21-24) if the temperature coefficient is within the predetermined tolerance range, in particular by soldering the jumper (26-29).

13. Manufacturing method according to claim 11, characterized in that a) the printed circuit board (8) is a universal printed circuit board suitable for different types of current measuring resistors, and b) the jumpers (26-29) are positioned depending on the type of current measuring resistor (2) in order to adapt the universal printed circuit board to the type of current measuring resistor (2).

14. Manufacturing method according to claim 13, characterized in that the position of the jumpers (26-29) is read out from a database as a function of the type of current measuring resistor (2), wherein the appropriate position of the jumpers (26-29) is stored in the database for the different types of current measuring resistors.

15. Adjustment system for producing a current measuring arrangement (1) according to one of claims 1 to 10, with a) a current measuring arrangement (1) according to one of the preceding claims, b) a current source (34) for supplying the current measuring resistor (2) with an electric current (IMESS), c) a temperature control device (35) for controlling the temperature of the current measuring resistor (2) to a predetermined temperature (T A , T B ), d) a voltage measuring device (36) for measuring the voltage drop (U A , U B ) across the resistance element (5) of the current measuring resistor (2) during the current supply by the current source and at the temperature set by the temperature control device, e) an evaluation unit (37) for determining the position of the jumper (26-29) as a function of the electrical current, the predetermined temperature and the measured voltage drop across the resistance element (5) of the current measuring resistor (2) and f) a mounting device (38) for mounting the printed circuit board (8) with at least one jumper at the determined position.

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