Current sensor arrangement and vehicle battery

Abstract

The present invention relates to a sensor device (1) for determining a current flowing through a conductor (20), preferably for determining a current flowing through a bus bar of a vehicle battery (100), the device comprising a conductor (20) for conducting a current in a longitudinal direction (30) and a sensor arrangement (5) of magnetic field sensors (S11-S24) for detecting a magnetic field formed by the current flow in the conductor (20) around the conductor (20), wherein the conductor (20) is divided, in the region of the sensor arrangement (5), into at least two conductor paths (21, 22) which extend in the longitudinal direction (30) and are spaced apart from one another. The invention also relates to a vehicle battery (100) comprising such a sensor arrangement (1, 2).

Description

[0001] Current sensor arrangement and vehicle battery

[0002] Technical area

[0003] The present invention relates to a sensor device for detecting a current flowing through a current conductor, for example for detecting a current flowing through a bus bar of a vehicle battery, and a vehicle battery for providing the primary drive energy of an electric vehicle.

[0004] State of the art

[0005] It is known to use sensor devices comprising a plurality of magnetic field sensors, i.e. sensors that output a corresponding signal based on the field strength or flux density of a magnetic field to which the magnetic field sensors are exposed, to detect or determine a current flowing through a current conductor, such as a bus bar in a vehicle battery in an electric vehicle. When a current flows through a current conductor in a longitudinal direction of the current conductor, a magnetic field is formed due to the current flow. The field lines of the magnetic field extend in the circumferential direction relative to the direction of the current flow, i.e. the longitudinal direction of the current conductor. The strength or flux density of the formed magnetic field is proportional to the current strength of the current flowing through the current conductor. The signals from the magnetic field sensor, in turn, are proportional to the flux density of the formed magnetic field.The signals emitted by the magnetic field sensors can therefore be used to determine the strength of the flowing current.

[0006] Such magnetic field sensors can be coils, for example. The sensitivity of the magnetic field sensor coil with respect to the magnetic field depends, among other things, on the angular orientation of the coil, or more precisely, on the angular orientation of the coil's longitudinal axis relative to the direction of the field lines of the magnetic field. The saturation limit of the coils is often well below the flux density of the resulting magnetic field, which is created by the current flowing through the conductor being measured. For example, in bus bars in vehicle batteries of electric vehicles, currents of the order of 1000 A, 1500 A, or even 2000 A can flow during operation. This current generates a correspondingly strong magnetic field.To prevent the coils from becoming saturated during normal vehicle battery operation, the coils are arranged at a large angle to the direction of the magnetic field, or more precisely, to the direction of the field lines, i.e., at a small angle to the longitudinal direction in which the current flows. This ensures that the effective sensitivity of the coils with respect to the magnetic field is correspondingly low. In other words, the proportion of the magnetic field acting on the coil decreases as the angle decreases. In particular, due to the comparatively low sensitivity of the coils with respect to the magnetic field being measured, the coils can be sensitive to interference fields, which can distort the measurement signal.

[0007] DE 10 2021 110 370 A1 and DE 10 2021 127 855 A1 describe conventional sensor devices. DE 10 2021 110 370 A1 describes the sensitivity behavior of coils with respect to their orientation to the magnetic field. DE 10 2021 110 370 A1 and DE 10 2021 127 855 A1 each show a sensor device in which two coils are arranged axially symmetrically relative to the longitudinal axis of the current-transmitting conductor, side by side, at one location in the longitudinal direction. The first coil has an angle of inclination to the longitudinal axis of the busbar, which is mirrored for the second magnetic field sensor coil due to the axially symmetrical arrangement. The two coils on the second side are symmetrical and thus each arranged parallel to the coils on the first side.

[0008] Description of the invention

[0009] Based on the known prior art, it is an object of the present invention to provide an improved sensor device for detecting a current flowing through a current conductor, for example an improvement with regard to the behavior of the sensor device in the presence of a magnetic interference field and / or with regard to an improved sensitivity of the magnetic field sensors, as well as a correspondingly improved vehicle battery.

[0010] According to a first aspect, the object is achieved by a sensor device for detecting a current flowing through a current conductor, for example, for detecting a current flowing through a bus bar of a vehicle battery, having the features of claim 1. Advantageous further developments emerge from the subclaims, the description, and the figures.

[0011] Accordingly, a sensor device for detecting a current flowing through a conductor, for example, for detecting a current flowing through a bus bar of a vehicle battery, is proposed. It comprises a conductor for conducting a current along a longitudinal direction and a sensor arrangement of magnetic field sensors for detecting a magnetic field formed around the conductor by the current flow in the conductor. The conductor is divided in the region of the sensor arrangement into at least two longitudinally extending, spaced-apart conductor paths. The current flowing through the conductor is thus distributed over or onto the two conductor paths; the conductor paths are thus connected in parallel.The individual currents through the conductor paths, i.e. the current component conducted through the first conductor path and the current component conducted through the second conductor path, are therefore lower than the current flowing through the undivided conductor. The current components add up to the current flowing through the undivided conductor. Accordingly, the magnetic fields around the conductor paths created by the respective current components are also lower than the field generated on an undivided conductor. Furthermore, in the area between the conductor paths, the directions of the field lines of the generated magnetic fields are opposite, so that the magnetic fields at least partially compensate for each other. A magnetic field resulting from the two magnetic fields of the conductor paths is therefore weakened or reduced in the area between the split conductor paths.The magnetic field sensors of the sensor arrangement are therefore exposed to a lower magnetic field than with conventional sensor devices from the prior art, compared to an arrangement on or in the region of an undivided conductor. Accordingly, the magnetic field sensors only reach saturation at higher currents or can be arranged at a smaller angle to the direction of the field lines of the magnetic field acting on them, i.e., at a comparatively large angle to the longitudinal direction of the conductor paths. In particular, if, according to a further development, the magnetic field sensors are arranged on a common carrier, for example, a circuit board, the possible gradient of external fields with respect to the sensor arrangement, or more precisely with respect to the at least one signal output by its magnetic field sensors, is significantly reduced.With the optional mounting of the magnetic field sensors at a comparatively large angle, for example, greater than 60° or even 90° to the current flow, the mounting of the parts on the carrier can be carried out much more easily and with fewer tolerances than with an arrangement of the magnetic field sensors at a comparatively small angle to the direction of current flow, for example, 3° to 15°. Accordingly, production is simplified and manufacturing costs reduced.

[0012] The current conducted through the undivided current conductor is distributed among the conductor paths essentially in proportion to the cross-sectional areas of the conductor paths. If the conductor paths are made of the same material and have the same cross-sectional area, half of the total current is conducted through each conductor path. Accordingly, the magnetic fields generated by the current components flowing through the conductor paths are then also essentially the same size. According to one embodiment, at least one magnetic field sensor of the sensor arrangement is arranged between the conductor paths, with preferably at least two magnetic field sensors of the sensor arrangement being arranged between the first conductor path and the second conductor path. As described above, the magnetic field generated by the current component flowing through the first conductor path and the corresponding magnetic field of the second conductor path between the conductor paths are oppositely directed.More precisely, the field lines of the magnetic fields are directed oppositely or at least have oppositely directed vector components. In the area between the conductor paths, the resulting magnetic field is therefore at least partially weaker than the individual magnetic fields of the conductor paths. Due to the comparatively low resulting magnetic field, the at least one magnetic field sensor can be arranged at a smaller angle to the field lines of the magnetic fields, in other words at a larger angle to the longitudinal direction, than is the case with conventional sensor devices from the prior art when current of the same current strength is passed through the current conductors. The magnetic field sensors are advantageously arranged in the direction of the field lines of the magnetic fields and / or at approximately 90° to the direction of current flow through the current conductor.

[0013] According to one embodiment, all magnetic field sensors of the sensor arrangement are arranged between the conductor paths. Accordingly, the advantages described above can be achieved for all magnetic field sensors.

[0014] Optionally, at least one magnetic field sensor is arranged on an inner side of the first conductor path and / or at least one magnetic field sensor is arranged on an inner side of the second conductor path. The "inner side" of the conductor paths is each side of a conductor path that faces the other conductor path.

[0015] According to one embodiment, at least one magnetic field sensor of the sensor arrangement is arranged outside the conductor paths with respect to the conductor paths. All magnetic field sensors of the sensor arrangement can also be arranged outside the conductor paths with respect to the conductor paths.

[0016] Optionally, at least one magnetic field sensor is arranged on an outer side of the first conductor path and / or at least one magnetic field sensor is arranged on an outer side of the second conductor path. The "outer side" of the conductor paths is in each case a side of a conductor path that faces away from the respective other conductor path. According to one embodiment, at least one magnetic field sensor of the sensor arrangement can be assigned to a conductor path, for example the first conductor path, and / or at least one magnetic field sensor of the sensor arrangement can be assigned to the other conductor path, for example the second conductor path. In this document, "assigned" is understood to mean that the magnetic field sensor is arranged closer to the "assigned" conductor path, advantageously in such a way that the influence of the magnetic field of the assigned conductor path on the magnetic field sensor is greater than the influence of the magnetic field of the other conductor path.In other words, the field strength of the magnetic field generated via current flow through the associated conductor path is greater than the field strength of the magnetic field of the corresponding other conductor path.

[0017] The flux density B of a magnetic field generated by current flow in a (straight) conductor (path) can be calculated as: where / z0 = the magnetic field constant, r = the distance to a longitudinal central axis of the conductor (path), and / = the current flowing through the conductor (path). This essentially applies without restriction to (circular) round conductors in the near field as well as to conductors in the far field. For conductors with a non-circular cross-section, for example, for conductors with a rectangular cross-section, the flux density is also essentially dependent on the distance to the conductor; however, the flux density is also dependent on the angle around the longitudinal direction, as can be seen, for example, from the attached Figure 3 described below.

[0018] In a zero field region, the magnetic field of the first conductor path (8?) and the magnetic field of the second conductor path (8?) essentially cancel each other out, in other words, when: ß , - ​​ß2= 0 respectively.

[0019] Since the flux density, as can be seen above, depends on the quotient, the following results for the zero field range:

[0020] — Z1 - I2 r I- 11 Z2ri — r2= 0 or — n = — r2

[0021] In this zero-field range, the resulting magnetic field resulting from the addition of the magnetic fields of the conductor paths essentially has a flux density of zero. According to one embodiment, at least one magnetic field sensor of the sensor arrangement is arranged in the zero-field range between the first conductor path and the second conductor path. Accordingly, essentially no magnetic field generated by the current flow is measured by this at least one sensor. A signal generated by the at least one magnetic field sensor in the zero-field range due to a magnetic field can therefore be used by this at least one magnetic field sensor to determine the presence of an external magnetic field. In other words, the at least one magnetic field sensor arranged in the zero-field range can be designed to detect an external (electro)magnetic influence or interference field.

[0022] According to one embodiment, at least one magnetic field sensor of the sensor arrangement is arranged on a lateral side of one of the conductor paths with respect to the conductor paths, wherein preferably at least one sensor is arranged on a lateral side of the first conductor path and at least one magnetic field sensor is arranged on a lateral side of the second conductor path.

[0023] In this document, a “lateral side” refers to a transverse direction that is transverse to the longitudinal direction between the conductor paths and is oriented laterally to this direction.

[0024] According to one embodiment, at least two magnetic field sensors of the sensor arrangement are arranged on a common carrier, preferably a common printed circuit board.

[0025] Alternatively or additionally, at least one magnetic field sensor can be arranged on a first side of the common carrier and at least one magnetic field sensor can be arranged on a second side of the common carrier opposite the first side.

[0026] Alternatively or additionally, at least one magnetic field sensor can be accommodated in a housing, for example at least partially embedded in a potting compound body.

[0027] Advantageously, all magnetic field sensors of the sensor arrangement or the sensor arrangement are accommodated in the housing.

[0028] The housing can be shaped such that it can be inserted and fixed between the conductor paths and / or can be plugged laterally onto a conductor path. This allows for a simple and precise and permanent positioning and orientation of the magnetic field sensors accommodated in the housing and held in a fixed position. According to one embodiment, the sensor arrangement comprises at least two magnetic field sensors arranged at the same height or, synonymously, at the same position with respect to the longitudinal direction.

[0029] Alternatively or additionally, the sensor arrangement may comprise at least one magnetic field sensor arranged in a first position relative to the longitudinal direction and at least one magnetic field sensor arranged in a second position relative to the longitudinal direction.

[0030] According to one embodiment, at least two magnetic field sensors of the sensor arrangement can each be arranged at an angle between greater than 0° and 90° to the longitudinal direction. More specifically, at least two magnetic field sensors can each be arranged at an angle to the longitudinal direction, in which, for example, a core of the magnetic field sensor can extend.

[0031] According to one embodiment, at least two magnetic field sensors of the sensor arrangement can be arranged at an angle of equal magnitude to the longitudinal direction between greater than 0° and 90°. More specifically, at least two magnetic field sensors can be arranged with their longitudinal direction, in which, for example, a core of the magnetic field sensor can extend, at an angle of equal magnitude to the longitudinal direction.

[0032] Alternatively or additionally, at least two magnetic field sensors can be oriented parallel to each other.

[0033] Alternatively or additionally, at least two magnetic field sensors can be oriented perpendicular to the longitudinal direction. These at least two sensors are advantageously arranged between the conductor paths. This is because, as described above, in the area between the conductor paths, there is a reduced resulting magnetic field compared to the flux densities of the individual magnetic fields of the conductor paths, i.e., a magnetic field with a lower resulting flux density than outside the conductor paths.

[0034] According to one embodiment, the magnetic field sensors of the sensor arrangement can be designed as coils.

[0035] According to one embodiment, the current conductor can be a busbar for conducting current in a vehicle battery. According to one embodiment, at least two magnetic field sensors, preferably exactly two or exactly four magnetic field sensors, of the sensor arrangement can be interconnected to form a sensor path or channel, with each sensor path or channel outputting its own signal, for example, to a control device and / or evaluation device.

[0036] The sensor arrangement may optionally comprise at least two sensor paths.

[0037] According to one embodiment, a sensor path or channel can be arranged in a region of the conductor, more precisely the conductor paths, in which it has a first cross-sectional shape, and a further sensor path or channel can be arranged in a region of the conductor in which it has a second cross-sectional shape.

[0038] The above-mentioned object is further achieved by a vehicle battery for providing the primary drive energy of an electric vehicle with the features of claim 13. Advantageous further developments emerge from the present description and the figures.

[0039] Accordingly, a vehicle battery for providing the primary drive energy of an electric vehicle is proposed, which comprises at least one battery module for providing an electrical voltage and a sensor device according to one of the preceding embodiments.

[0040] Short description of the characters

[0041] Further advantageous embodiments of the invention are explained in more detail in the following description of the figures. In the figures:

[0042] Figures 1 to 3 are schematic views of a sensor device for detecting a

[0043] Conductor of current flowing in a longitudinal direction;

[0044] Figures 4, 5 are schematic views of a sensor device according to a further embodiment;

[0045] Figures 6, 7 are schematic views of a sensor device according to a further embodiment;

[0046] Figures 8, 9 are schematic views of a sensor device according to a further embodiment;

[0047] Figures 10, 11 show schematic views of a sensor device according to a further embodiment;

[0048] Figures 12 and 13 show schematic views of a sensor device according to a further embodiment; Figures 14 and 15 show schematic views of a sensor device according to a further embodiment;

[0049] Figures 16, 17 are schematic views of a sensor device according to a further embodiment;

[0050] Figures 18, 19 are schematic views of a sensor device according to a further embodiment;

[0051] Figures 20 and 21 show schematic views of a sensor device according to a further embodiment;

[0052] Figures 22, 23 are schematic views of a sensor device according to a further embodiment;

[0053] Figures 24, 25 show schematic views of a sensor device according to a further embodiment;

[0054] Figure 26 shows schematically the output signal curves from magnetic field sensors of the

[0055] Sensor device according to Figures 24 and 25 formed channels via the current intensity;

[0056] Figures 27, 28 show schematic views of a sensor device according to a further embodiment;

[0057] Figure 29 schematically shows the curves of the output signals of channels formed from magnetic field sensors of the sensor device according to Figures 27 and 28 versus the current intensity;

[0058] Figures 30, 31 are schematic views of a sensor device according to a further embodiment;

[0059] Figure 32 schematically shows the curves of the output signals of channels formed from magnetic field sensors of the sensor device according to Figures 30 and 31 versus the current intensity;

[0060] Figures 33, 34 show schematic views of a sensor device according to a further embodiment;

[0061] Figure 35 schematically shows the curves of the output signals of channels formed from magnetic field sensors of the sensor device according to Figures 33 and 34 versus the current intensity;

[0062] Figures 36 to 38 show schematic views of a sensor device according to a further embodiment; Figure 39 shows schematically the curves of the output signals from channels formed from magnetic field sensors of the sensor device according to Figures 36 to 38 versus the current intensity;

[0063] Figure 40 schematically shows a side view of a sensor device according to a further embodiment;

[0064] Figure 41 schematically shows the curves of the output signals of channels formed from magnetic field sensors of the sensor device according to Figure 40 versus the current intensity;

[0065] Figure 42 schematically shows a vehicle battery for providing the primary drive energy of an electric vehicle.

[0066] Detailed description of advantageous embodiments

[0067] Advantageous embodiments are described below with reference to the figures. Identical, similar, or equivalent elements in the different figures are provided with identical reference numerals, and a repeated description of these elements is partially omitted to avoid redundancies.

[0068] Figure 1 schematically shows a side view along a transverse direction 31 oriented perpendicular to a longitudinal direction 30 of a sensor device 1 for detecting a current flowing through a current conductor 20 in a longitudinal direction 30. The current conductor 20 is designed here as a busbar for a vehicle battery of an electric vehicle (not shown).

[0069] In the region of a sensor arrangement 5, the current conductor 20 is divided into two spaced-apart conductor paths 21, 22 extending in the longitudinal direction 30. The current flowing through the current conductor 2 is thus distributed between the current paths 21, 22.

[0070] In this case, the current conductor 20 is formed as a single piece. For this purpose, the first current path 21 was welded to a blank body of the current conductor 20, for example, via friction welding or ultrasonic welding.

[0071] The conductor paths 21, 22 of the current conductor 20 comprise the same material and, viewed transversely to the longitudinal direction 30, have the same cross-sectional area. Accordingly, the current is essentially divided equally between the two conductor paths 21, 22. The portions of the total current flowing through the conductor paths 21, 22 are referred to in this document as "current components." Alternatively, the current conductor may also comprise different materials. For example, the conductor paths 21, 22 and / or the undivided region of the current conductor 20 may comprise different materials.

[0072] A magnetic field 41, 42 is generated around each conductor path 21, 22 due to the current component flowing in the longitudinal direction 30, the field lines of which run in the circumferential direction around the conductor path 21, 22 with respect to the longitudinal direction 30.

[0073] As introduced above, the sensor device 1 comprises a sensor arrangement 5 of magnetic field sensors for detecting a magnetic field formed around the current conductor 20 via current flow in the current conductor 20.

[0074] According to this embodiment, the sensor arrangement 5 comprises two magnetic field sensors S11, S12 designed as sensor coils with a core, which are arranged in the same (first) position P1 with respect to the longitudinal direction 30, specifically in this case between the conductor paths 21, 22. A first magnetic field sensor S11 is assigned to the first conductor path 21. It is therefore arranged substantially closer to the first conductor path 21 than to the second conductor path 22. A second magnetic field sensor S12 is assigned to the second conductor path 22. It is therefore arranged substantially closer to the second conductor path 22 than to the first conductor path 21. The magnetic field sensors S11, S12 are each arranged at a predetermined distance 33 from the conductor path 21, 22 assigned to them. They are each at the predetermined distance 33* from the other conductor path 22, 21.

[0075] It can be seen that the conductor paths 21, 22 of a height direction 32 oriented perpendicular to the transverse direction 31 and perpendicular to the longitudinal direction 30 have the same height 23. The height 23 optionally corresponds to half the height 25 of the current conductor 20 in the undivided state. The position of the magnetic field sensors S11, S12 refers to the longitudinal axes L11, L12 of the magnetic field sensors S11, S12. The longitudinal axes L11, L12 of the magnetic field sensors S11, S12 are located at the first position P1 in a common longitudinal axis plane, which in this case is oriented perpendicular to the longitudinal direction 30.

[0076] Figure 2 schematically shows a plan view along the height direction 32. For better understanding, the magnetic field sensors S11, S12 located below the conductor path 21 and their longitudinal axes L11, L12 are shown in Figure 2.

[0077] The current conductor 20 and the conductor paths 21, 22 have a constant width 24. Relative to the central longitudinal axis 34 of the conductor paths 21, 22, which extends in the longitudinal direction 30, the magnetic field sensors are arranged in the middle of the extension 35 of the conductor paths 21, 22 in the longitudinal direction 30. The magnetic field sensors S11, S12 are therefore each spaced apart from both ends of the conductor paths 21, 22 by a distance 36 equal to half the extension 35. Alternatively, the magnetic field sensors S11, S12 can also be arranged at a distance from the center of the extension 35.

[0078] The magnetic field sensors S11, S12 are further positioned centrally to the conductor paths 21, 22 with respect to the transverse direction 21.

[0079] Figure 3 shows schematically a sectional view through the sensor device 1 of Figures 1 and 2 at the level of the first position P1.

[0080] Since the height 23 and width 24 of the conductor paths 21, 22 are the same, both have the same cross-sectional area, which is shown hatched in this case, rectangular. Since the conductor paths 21, 22 are also made of the same material and have the same length, their conductor resistances are essentially the same. Accordingly, the current conducted through the current conductor 20 is distributed among the conductor paths 21, 22 essentially in a ratio of 1:1. In other words: with h = the current component of the first conductor path 21, / 2= the current component of the second conductor path 22, and / = the total current that is conducted or flows through the current conductor 20.

[0081] Accordingly, the magnetic fields 41, 42 formed around the conductor paths 21, 22 by the current components h / 2, indicated here by their circumferential field lines, are essentially identical. For better differentiation, the field lines of the first magnetic field 41 of the first conductor path 21 are shown in dashed lines, and the field lines of the second magnetic field 42 of the second conductor path 22 are shown in dotted lines.

[0082] The flux density B of the magnetic fields 41, 42 decreases proportionally to the distance or radius r relative to the central longitudinal axis 34 of the respective conductor path (see above).

[0083] The field direction of the magnetic fields 41, 42 is indicated by the arrows shown on the field lines. It can be seen that between the conductor paths 21, 22 the field direction of the magnetic fields 41, 42 is oriented in opposite directions. The magnetic fields 41, 42 therefore at least partially compensate each other, so that in the area between the conductor paths 21, 22 there is an area of ​​reduced resulting flux density. Since the magnetic fields 41, 42 are essentially the same (strong) due to the symmetrical structure of the conductor paths 21, 22, a zero-field area 43 results centrally between the conductor paths 21, 22, in which there is almost no flux density of the resulting magnetic field, which is composed of the addition or superposition of the magnetic fields 41, 42. In other words, the zero-field area 43 is essentially free of magnetic fields.

[0084] In this zero field area, at least one magnetic field sensor (not shown here) can be arranged to determine the presence of an external interference field.

[0085] Since the first magnetic field sensor S11 is arranged on the side of the first conductor path 21 with respect to the zero-field region, the flux density of the first magnetic field 41 there is greater than the flux density of the second magnetic field 42. The resulting reduced magnetic field there therefore extends roughly in the direction of the field lines of the first magnetic field 41.

[0086] Since the second magnetic field sensor S12 is arranged on the side of the second conductor path 22 relative to the zero-field region, the flux density of the second magnetic field 42 is greater there than the flux density of the first magnetic field 41. The resulting reduced magnetic field thus extends roughly in the direction of the field lines of the second magnetic field 42.

[0087] The magnetic field sensors can be connected together to form a channel or form a common channel that can output a sensor signal based on the magnetic fields 41, 42.

[0088] The magnetic field sensors S11, S12 are arranged symmetrically between the conductor paths 21, 22 with respect to the vertical direction 32. Accordingly, they are each at the same distance 38 from an axis of symmetry, indicated here as the longitudinal direction 30. The axis of symmetry is located centrally between the conductor paths 21, 22. These therefore have the same distance 37 from the axis of symmetry.

[0089] The magnetic field sensors S11, S12 are arranged in the height direction 32, at the height of the first position 1, at a distance 50 from each other.

[0090] The magnetic field sensors S11, S12 are oriented with their respective (central) longitudinal axes L11, L12 perpendicular to the longitudinal direction 30, i.e. perpendicular to the current flow direction. They are therefore oriented in the circumferential direction relative to the central longitudinal axes 34 of the conductor paths 21, 22. The longitudinal axes L11, L12 are therefore oriented in the direction of the field lines of the magnetic fields 21, 22. The magnetic field sensors S11, S12 therefore measure with the maximum possible sensitivity. This arrangement is also possible for a current conductor with currents of up to 1500 A, 2000 A or even more, since the magnetic fields 21, 22 partially compensate each other. Figure 4 shows a schematic side view of a sensor device 1 according to a further embodiment. Figure 5 shows a schematic top view of the sensor device 1. The sensor device 1 according to Figures 4 and 5 essentially corresponds to that of Figures 1 to 3, with the exception of the sensor arrangement 5.

[0091] According to this embodiment, the sensor arrangement 5 comprises two magnetic field sensors S11, S21 designed as sensor coils with a core, wherein a first sensor S11 is arranged at a first position P1 with respect to the longitudinal direction 30 and a second sensor S21 is arranged at a second position spaced apart from the first position P1 by a distance 51 with respect to the longitudinal direction 30. The magnetic field sensors S11, S21 are arranged between the conductor paths 21, 22, thus in the region of the resulting reduced magnetic field. Both magnetic field sensors S11, S21 are assigned to the first conductor path 21. Accordingly, they are arranged significantly closer to the first conductor path 21 than to the second conductor path 22. The position of the magnetic field sensors S11, S21 therefore corresponds to that of the sensor S11 in the embodiment according to Figures 1-3, wherein the magnetic field sensors S11, S21 are only spaced apart from each other by a distance 51.The sensor arrangement 5 is arranged centrally in the region of the conductor paths 21, 22 with respect to the longitudinal direction 30. The magnetic field sensors S11, S21 are each at a distance 39 from a central position in the longitudinal direction 30, which corresponds to half the distance 51.

[0092] To achieve different output signals, the conductor paths 21, 22 can each include at least one recess 72, for example, at the second position P2, which is indicated here by dashed lines. As a result, the height and vector orientation of the magnetic field, or more precisely the flux density, are different for the two magnetic field sensors.

[0093] Figure 6 schematically shows a side view of a sensor device 1 according to another embodiment. Figure 7 schematically shows a top view of the sensor device 1. The sensor device 1 according to Figures 6 and 7 essentially corresponds to that of Figures 1 to 5, with the exception of the sensor arrangement 5.

[0094] The sensor arrangement 5 in the present case comprises four magnetic field sensors S11 - S22, all of which are arranged between the conductor paths 21, 22. Two magnetic field sensors S11, S12 are arranged at the level of a first position P1, analogously to the sensors S11, S12 from Figures 1-3. Two further magnetic field sensors S21, S22 are arranged, analogously to sensor S21 from Figures 4 and 5, at a second position P2 spaced apart by the distance 51 from the first position, again analogously to the sensors S11, S12 from Figures 1-3. In other words, the sensor arrangement 5 from Figures 6-7 can be understood as a combination of the sensor arrangements 5 from Figures 1-3 and Figures 4-5.

[0095] The magnetic field sensors S11-S22 are arranged on a common carrier 6. The sensors S11, S21 assigned to the first conductor path 21 are arranged on a first side 60 of the carrier 6 facing the first conductor path 21, and the sensors S21, S22 assigned to the second conductor path 22 are arranged on a second side 61 of the carrier 6 facing the second conductor path 22 and opposite the first side 60.

[0096] The sensors S11 and S21 lie with their longitudinal axes L11 and L21 on a common plane which is oriented parallel to the longitudinal direction 30 and, in this case, optionally parallel to the inner side 27 of the associated conductor path 21.

[0097] The sensors S12 and S22 lie with their longitudinal axes L12 and L22 on a common plane which is oriented parallel to the longitudinal direction 30 and in this case is optionally parallel to the inner side 27 of the associated conductor path 22.

[0098] The sensors S11 and S12 lie with their longitudinal axes L11 and L12 on a common plane which is oriented perpendicular to the longitudinal direction 30 and, in this case, optionally perpendicular to the inner side 27 of the associated conductor path 21.

[0099] The sensors S21 and S22 lie with their longitudinal axes L21 and L22 on a common plane which is oriented perpendicular to the longitudinal direction 30 and, in this case, optionally perpendicular to the inner side 27 of the associated conductor path 22.

[0100] The positions, distances, spacings, etc. described in this document refer to the longitudinal axes L11-L22 of the sensors.

[0101] The support 6 shown in Figures 6 and 7 is, of course, not limited to this embodiment, but can be used in all embodiments. More than one support 6 can also be provided.

[0102] For example, the magnetic field sensors S11 and S12 can be interconnected to form a channel, and the magnetic field sensors S21 and S22 can be interconnected accordingly. Alternatively, a channel can also be formed from the magnetic field sensors S11-S22. Figure 8 schematically shows a side view of a sensor device 1 according to another embodiment. Figure 9 schematically shows a top view of the sensor device 1. The sensor device 1 according to Figures 8 and 9 essentially corresponds to that of Figures 1 to 7, with the exception of the sensor arrangement 5.

[0103] The sensor arrangement 5 according to Figures 8 and 9 comprises four magnetic field sensors S11, S12, S13, S14, which are each arranged at an angle a to the longitudinal direction 30.

[0104] In this document, the "angle" between the orientation of a magnetic field sensor and the longitudinal direction is understood to mean an angle or angle that is enclosed by the longitudinal axis of the respective magnetic field sensor and the longitudinal direction in a plan view onto a plane in which the longitudinal axis of the magnetic field sensor lies and which is oriented parallel to the longitudinal direction. In other words, the "angle" corresponds to an angle that is enclosed between a projection of the longitudinal axis and a projection of the longitudinal direction onto the plane. The plane corresponds to a viewing plane of a plan view perpendicular to the longitudinal direction, as shown, for example, in Figures 1, 4, 6, and 8.

[0105] The sensor arrangement 5 comprises two magnetic field sensors S11, S12 assigned to the first conductor path 21, whose longitudinal axes L11, L12 are arranged in a plane oriented parallel to the longitudinal direction 30, and of which a first magnetic field sensor S11 is inclined with respect to its longitudinal axis L11 against the longitudinal direction 30 by the angle α in a first direction, which in this case extends transversely in a first directional sense, and of which the second magnetic field sensor S12 is inclined with respect to its longitudinal axis L12 against the longitudinal direction 30 by the angle α in a wide direction, which extends transversely in a directional sense opposite to the first directional sense. The first and second magnetic field sensors S11, S12 together form a pair of magnetic field sensors.The sensor arrangement 5 further comprises two magnetic field sensors S13, S14 assigned to the second conductor path 22, the longitudinal axes L13, L14 of which are arranged in a plane oriented parallel to the longitudinal direction 30. Of these, a first magnetic field sensor S13 is inclined in the first direction with respect to its longitudinal axis L13 against the longitudinal direction 30 by the angle α, and a second magnetic field sensor S14 is inclined in the second direction with respect to its longitudinal axis L14 against the longitudinal direction 30 by the angle α.

[0106] The magnetic field sensors S11, S12, or their longitudinal axes L11, L12, or the plane defined by them, are arranged at a distance 33 from the first conductor path 21. The magnetic field sensors S13, S14, or their longitudinal axes L13, L14, or the plane defined by them, are arranged at a distance 33 from the second conductor path 21. The two distances 33 can be the same, as in this case, but they can also be different.

[0107] The angles a of the four sensors S11-S14 each cover the same value, optionally 66° here. However, they can also have any other value between less than 90° and greater than 0°. The angular arrangement of the sensors S11-S14 allows the sensitivity of the sensors S11-S14 with respect to the magnetic fields 41, 42 or the resulting magnetic field to be adjusted. The smaller the angle a to the longitudinal direction 30, the lower the sensitivity of the magnetic field sensors S11-S14 and the later the magnetic field sensors S11-S14 reach saturation as the flux density to which they are exposed increases.

[0108] Due to the arrangement of the magnetic field sensors S11-S14 between the conductor paths 21, 22, i.e. in a region of the reduced magnetic field, the magnetic field sensors S11-S14 can be oriented at a larger angle a to the longitudinal direction 30 compared to conventional devices according to the prior art, such as DE 10 2021 127 855 A1, for example in a range of less than 90° to 10°, optionally less than 90° to 15°, optionally less than 90° to 20°, optionally less than 90° to 25°, optionally less than 90° to 30°, optionally less than 90° to 35°, optionally less than 90° to 40°, optionally less than 90° to 45°, optionally less than 90° to 50°, optionally less than 90° to 55°, optionally less than 90° to 60°, optionally less 90° to 65°, optionally less than 90° to 70°, optionally less than 90° to 75°, optionally less than 90° to 80°, optionally less than 90° to 85°.

[0109] The angles a of the magnetic field sensors S11-S14 can all have the same amount or can have different angles a, in which case preferably two of the angles a each have the same amount.

[0110] The magnetic field sensors S11-S14 are arranged at a common height or position P1 relative to the longitudinal direction 30 with respect to their center points 52 in the direction of their longitudinal axes L11-L14. The magnetic field sensors S11-S14 are arranged with their center points 52 further from the central longitudinal axis 34 at a distance 38* in the transverse direction 31.

[0111] Figure 10 schematically shows a side view of a sensor device 1 according to a further embodiment. Figure 11 schematically shows a top view of the sensor device 1. The sensor device 1 according to Figures 10 and 11 essentially corresponds to that of Figures 8 and 9, with the exception of the sensor arrangement 5. The sensor arrangement 5 according to Figures 10 and 11 comprises four magnetic field sensors S11, S12, S13, S14, which are each arranged at an angle α to the longitudinal direction 30 in a common first position P1. It further comprises four magnetic field sensors S21, S22, S23, S24, which are each arranged at an angle α to the longitudinal direction 30 in a common second position P2, which is arranged at a distance 51 from the first position P1, analogous to the embodiments in Figures 4-7.

[0112] The magnetic field sensors S11, S12, S21, S22 are assigned to the first conductor path 21. They are arranged with their longitudinal axes L11, L12, L21, L22 on a common plane oriented parallel to the longitudinal direction 30 or the central longitudinal axis 34 and parallel to the inner side 27 of the first conductor path 21.

[0113] The magnetic field sensors S13, S14, S23, S24 are assigned to the second conductor path 22. They are arranged with their longitudinal axes L13, L14, L23, L24 on a common plane oriented parallel to the longitudinal direction 30 or the central longitudinal axis 34 and parallel to the inner side 27 of the second conductor path 22.

[0114] In the present case, the magnetic field sensors S11-S24 are arranged such that the intersection points SP11, SP12 of the pairs of magnetic field sensors S11 and S12, as well as S13 and S14, lie on the side facing away from the second position P2 with respect to the first position P1, and the intersection points SP21, SP22 of the pairs of magnetic field sensors S21 and S22, as well as S23 and S24, lie on the side facing away from the first position P1 with respect to the second position P2. In other words, the magnetic field sensors S11-S24 have an O-arrangement with respect to the longitudinal direction 30.

[0115] Alternatively, the magnetic field sensors S11-S24 can also be arranged in an X-arrangement. This means that the intersection points SP11, SP12 of the pairs of magnetic field sensors S11-S14 positioned at the first position P1 lie on the side facing the second position P2 with respect to the first position P1, and the intersection points SP21, SP22 of the pairs of magnetic field sensors S21 and S22, as well as S23 and S24 of the second position P2 lie on the side facing the first position P1 with respect to the second position P2.

[0116] Alternatively, the magnetic field sensors S11-S24 can also be arranged in a CC arrangement. This means that the intersection points SP11, SP12 of the pairs of magnetic field sensors S11-S14 positioned at the first position P1 are located on the side facing away from the second position P2 with respect to the first position P1, and the intersection points SP21, SP22 of the pairs of magnetic field sensors S21 and S22, as well as S23 and S24 of the second position P2 are located on the side facing the first position P1 with respect to the second position P2, or vice versa.

[0117] Alternatively, the magnetic field sensors S11-S14 of the first position P1 may be inclined in the same direction, and / or the magnetic field sensors S21-S24 of the second position P2 may be inclined in the same direction.

[0118] The magnetic field sensors S11-S24 of the sensor arrangement 5 are accommodated in a housing 70, which according to this optional embodiment is designed as a potting compound body that is potted around the sensor arrangement 5 and cured.

[0119] The housing 70 can be shaped such that it can be inserted and fixed between the conductor paths 21, 22.

[0120] The housing 70 shown in Figure 10 is of course not limited to this embodiment, but can be used in all embodiments, in particular in combination with at least one carrier 6 (see Figure 6).

[0121] Figure 12 schematically shows a side view of a sensor device 1 according to a further embodiment. Figure 13 schematically shows a sectional view through the sensor device 1 perpendicular to the longitudinal direction 30. The sensor device 1 essentially corresponds to that of Figures 1-3, with the exception that the conductor paths 21, 22 are of different heights. The first conductor path 21, to which the sensor arrangement 5 is assigned, has a first height 23' that is smaller than the second height 23" of the second conductor path 22. In this case, the height ratio of the first height 23' to the second height 23" is 1 to 3. Accordingly, the current components conducted through the conductor paths are not equal in size, but are divided in a ratio of 1 to 3. The magnetic field 41 formed by current flow through the first conductor path 21 is correspondingly less strong than the magnetic field 42 formed by current flow through the second conductor path 22.The zero-field region 43 is therefore not symmetrically spaced between the conductor paths 21, 22, but closer to the first conductor path 21. The zero-field region 43 can be three-dimensional, as shown here. It can also be present merely as a line or point.

[0122] The second magnetic field sensor S12 furthermore has a greater distance 33' from the second conductor path 22 than the first magnetic field sensor S11 has from the first conductor path 21 with its distance 33. The magnetic field sensors S11, S12 are arranged essentially symmetrically with respect to the zero field region 43 in the present case, but are not limited thereto. Due to the comparatively low resulting magnetic field between the conductor paths 21, 22 near the zero field region 43, the magnetic field sensors S11, S12 can be arranged with their longitudinal axes L11, L12 in the direction of the field lines of the magnetic fields 41, 42, i.e. perpendicular to the longitudinal direction 30 or to the central longitudinal axes 34.

[0123] Figure 14 schematically shows a side view of a sensor device 1 according to a further embodiment. Figure 15 schematically shows a sectional view through the sensor device 1 perpendicular to the longitudinal direction 30. The sensor device 1 essentially corresponds to that of Figures 1 to 3, with the difference that instead of one sensor arranged centrally to the central longitudinal axis 34, two magnetic field sensors S11 and S12 assigned to the first conductor path 21 and two magnetic field sensors S13 and S14 assigned to the first conductor path 21 are provided, which are each arranged at a distance 38* in the transverse direction 31 from the central longitudinal axis 34 with respect to their center points 52, specifically at the first position P1

[0124] As indicated by dashed lines in Figure 15, the sensor arrangement 5 can optionally also have magnetic field sensors S21-S24 assigned at a second position. Such an embodiment would correspond to the embodiment of Figures 6 and 7, wherein, as described above, two magnetic field sensors S11-S24 are arranged on a common longitudinal axis L11-L24.

[0125] Alternatively, the sensor arrangement can also comprise only the magnetic field sensors S11, S12, S21, and S22. Then, advantageously, at least one conductor path 21, 22 includes at least one recess 72, as indicated by the dotted lines.

[0126] Figure 16 schematically shows a side view of a sensor device 1 according to a further embodiment. Figure 17 schematically shows a top view of the sensor device 1. The sensor device 1 essentially corresponds to that of Figures 10 and 11, wherein here all magnetic field sensors S11-S24 are assigned to the first conductor path 21. In addition, the magnetic field sensors S11, S12, S21, S22 are arranged outside the conductor paths 21, 22. They are arranged at a predetermined distance 33 from the outer side 26 of the first conductor path 21. The magnetic field sensors S13, S14, S23, S24 are arranged between the conductor paths 21, 22. They have a predetermined distance 33 from the inner side 27 of the first conductor path 21.

[0127] Figure 18 schematically shows a side view of a sensor device 1 according to a further embodiment. Figure 19 schematically shows a top view of the sensor device 1. The sensor device 1 essentially corresponds to that of Figures 10 and 11 as well as 16 and 17, wherein here all magnetic field sensors S11-S24 are arranged outside the conductor paths 21, 22. The magnetic field sensors S11, S12, S21, S22 are arranged analogously to the embodiment according to Figures 16 and 17 at a predetermined distance 33 from the outer side 26 of the first conductor path 21. The magnetic field sensors S13, S14, S23, S24 are analogously arranged at a predetermined distance 33 from the outer side 26 of the second conductor path 22. This embodiment has proven to be particularly advantageous when the conductor paths 21, 22 have different heights 23', 23" (compare Figures 12 to 15).

[0128] Figure 20 schematically shows a top view of a sensor device 1 according to a further embodiment. Figure 21 schematically shows a sectional view through the sensor device 1, centered on the conductor paths 21, 22. The sensor device 1 essentially corresponds to that of the preceding figures. However, the current conductor 20 is not divided in the vertical direction 32 here, but extends in a plane oriented parallel to the longitudinal direction 30 and the transverse direction 31. The conductor paths 21, 22 branch off from one another in the transverse direction 31.

[0129] The conductor paths 21, 22 and the current conductor 20 in the undivided state all have the same height 23. The width 24 of the conductor paths 21, 22 in their straight section in the region of the sensor arrangement 5 corresponds to half the width 24* of the undivided current conductor 20.

[0130] The sensor arrangement 5 essentially corresponds to that of Figures 10 and 11. Its magnetic field sensors S11-S24 are all assigned to the second conductor path 22. Relative to the conductor paths 21, 22, the magnetic field sensors S11-S24 are each arranged on a lateral side 28, 29 of the second conductor path 22. The magnetic field sensors S11, S12, S21, S22 are arranged on a first lateral side 28 of the second conductor path 22, and the magnetic field sensors S13, S14, S23, S24 are arranged on a second lateral side 29 of the second conductor path 22.

[0131] Figure 22 schematically shows a top view of a sensor device 1 according to another embodiment. Figure 23 schematically shows a sectional view through the sensor device 1, centered on the conductor paths 21, 22. The sensor device 1 essentially corresponds to that of Figures 20 and 21, with half of the magnetic field sensors S11-S24 being assigned to the first conductor path 21 and the other half being assigned to the second conductor path 22.

[0132] Figure 24 schematically shows a side view of a sensor device 1 according to a further embodiment. Figure 25 schematically shows a top view of the sensor device 1. The sensor device 1 essentially corresponds to that of Figures 14 and 15 if it only comprises the magnetic field sensors S11, S12, S13 and S14 and the conductor paths 21, 22 are symmetrical, as shown, for example, in Figure 3. Furthermore, the magnetic field sensors SUSI 4 are not arranged symmetrically to the central longitudinal axis 34, but rather laterally offset therefrom. In the present case, the magnetic field sensors S11, S13 are arranged centrally to the central longitudinal axis 34. They are interconnected and together form a first sensor path, i.e. a first channel CH1. Alternatively, the magnetic field sensors S11, S13 can also be arranged at a predetermined distance from the central longitudinal axis 34.The magnetic field sensors S12, S14 are arranged at a predetermined distance 38* from the central longitudinal axis 34. Together, they form a second channel CH2.

[0133] Due to this asymmetrical arrangement of the channels CH1, CH2 transverse to the central longitudinal axis 34, the output signals S1 of the first channel CH1 and the output signals S2 of the second channel CH2 are different when a current of strength I flows, since their magnetic field sensors S11-S14 are exposed to different flux densities. The output signals S1, S2, which are caused purely by the magnetic fields generated via the current flow through the conductor 20, are in a fixed ratio V = S1 / S2. Figure 26 shows the curves of the output signals S1, S2 of the channels CH1 and CH2 versus the current I. This embodiment allows the presence or influence of an external field to be detected particularly effectively. If the ratio V(ist) of the output signals S1, S2 resulting from the measured values ​​of the channels CH1, CH2 deviates from the previously specified ratio V resulting purely from the current flow, this is an indicator of the presence of an external interference field.Figure 27 schematically shows a side view of a sensor device 1 according to a further embodiment. Figure 28 schematically shows a top view of the sensor device 1. The sensor device 1 essentially corresponds to that of Figures 24 and 25, wherein here the sensors S11-S14 are arranged symmetrically with respect to the central longitudinal axis 34, i.e. at the same distance 38*. To achieve the different output signals S1, S2, the conductor paths 21, 22 comprise a recess 72 at the same location. As a result, the height and vector orientation of the magnetic field, more precisely the flux density, are different for the channels CH1 and CH2, as indicated in Figure 29 analogously to Figure 26.

[0134] Figure 30 schematically shows a side view of a sensor device 1 according to a further embodiment. Figure 31 schematically shows a top view of the sensor device 1. The sensor device 1 essentially corresponds to that of Figures 6 and 7. The magnetic field sensors S21 and S22 are connected to a first channel CH1 and the magnetic field sensors S11 and S12 are connected to a second channel CH2. The magnetic field sensors S11, S12 of the second channel CH2 are arranged in a region of the conductor paths 21, 22 in which they have a first cross-sectional shape. The magnetic field sensors S21, S22 of the first channel CH1 are arranged in a region of the conductor paths 21, 22 in which they have a second cross-sectional shape different from the first cross-sectional shape.Due to the different cross-sectional shapes, here a different width in the transverse direction 31, the resulting flux density is different at the positions of the magnetic field sensors S11, S12 and at the positions of the magnetic field sensors S21, S22. Accordingly, when using the same magnetic field sensors S11-S22, different output signals S1 and S2 are generated, analogous to Figures 26 and 29, as indicated for the present embodiment in Figure 32.

[0135] Figure 33 schematically shows a side view of a sensor device 1 according to a further embodiment. Figure 34 schematically shows a top view of the sensor device 1. Here, the conductor paths 21, 22 are each S-shaped. In other words, they each comprise a first region 80 extending in the longitudinal direction 30, to which, parallel thereto, a region 81 extending counter to the longitudinal direction 30 adjoins, to which, in turn, a further region 82 extending in the longitudinal direction 30 adjoins. The direction 83 of the current flow in the regions 81-82 alternates.

[0136] Each area 81-82 is assigned magnetic field sensors S11-S32, each forming a channel CH1-CH3, analogous to the embodiment according to Figures 1-3. In this case, the measuring direction of the magnetic field sensors S11, S21, S31, indicated by the arrows designated by reference numeral 84, is oriented in the same direction. Furthermore, the measuring direction of the magnetic field sensors S12, S22, S32 is the same. Consequently, the output signal of channel CH3 is opposite to the output signals of channels CH1 and CH2.

[0137] By comparing at least two of the output signals of the channels CH1, CH2 and CH3, the presence of an external interference field can be determined.

[0138] The formation of the different output signals S1 to S3 or CH1 to CH3 is analogous to Figures 26, 29 and 32, indicated for this embodiment in Figure 35.

[0139] Figures 36 to 38 show three schematic views of a three-panel diagram of a sensor device 1 according to a further embodiment. In the present case, the sensor paths 21, 22 are U-shaped. They extend from a first connection 92 for connection to a busbar arrangement to a second connection 93 for connection to the busbar arrangement. The U-shape comprises two side flanks 90 arranged parallel to one another, which are connected via a central part 91 arranged transversely to them. The sensor arrangement 5 comprises at least two magnetic field sensors S11, S12 arranged in the region of the first side flank 90, which form a first channel CH1, and at least two magnetic field sensors S21, S22 arranged in the region of the second side flank 90, which form a second channel CH2.Due to the opposing directions 83 of the current flow in the first and second side edges 80, the presence of an external interference field can be inferred from an evaluation of the output signals of the channels CH1 and CH2, for example by forming a differential of the values ​​of the output signals of the channels CH1 and CH2 or by relating the values ​​of the output signals to one another.

[0140] Optionally, the sensor device 5 further comprises at least two magnetic field sensors S31, S32 arranged in the central part 91, which can form a third channel CH3. Optionally, the conductor paths 21, 22 and the sensor arrangement 5 can be provided as an assembly, here as an installation unit for installation in a busbar arrangement.

[0141] The formation of the different output signals S1 to S3 or CH1 to CH3 is analogous to Figures 26, 29, 32 and 35, for this embodiment indicated in Figure 39.

[0142] Figure 40 shows a side view of a sensor device 1 according to a further embodiment, in which the conductor paths 21, 22 are U-shaped. Unlike in the previous embodiment, the U-shape extends in the vertical direction 32. The first conductor path 21 thus extends around the second conductor path 22. In the region of the side flanks 90, analogous to Figures 1 to 3, at least two magnetic field sensors S11, S12 and S21, S22 are arranged between the conductor paths 21, 22, each forming a channel CH1 and CH2.

[0143] Optionally, at least two additional magnetic field sensors S31, S32 can be arranged between the first side flank of the second conductor path 22 and the second side flank of the second conductor path 22, which can form a further channel CH3. Optionally, the conductor paths 21, 22 and the sensor arrangement 5 can be provided as an assembly, here as an installation unit for installation in a busbar arrangement.

[0144] The formation of the different output signals S1 to S3 or CH1 to CH3 is analogous to Figures 26, 29, 32, 35 and 39, indicated for this embodiment in Figure 41.

[0145] Figure 42 shows a vehicle battery 100 for providing the primary drive energy of an electric vehicle (not shown). It comprises a plurality of battery modules 110 for providing an electrical voltage, each comprising a plurality of electrically contacted battery cells (not shown). The vehicle battery 100 further comprises a sensor device 1 according to one of the preceding embodiments. The embodiment according to Figures 1 to 3 is indicated here as an example. However, it can also comprise any other embodiment of the described sensor devices 1 in order to determine the current flowing through the current conductor 20, designed as a busbar for contacting the battery modules 110, during operation of the electric vehicle.

[0146] Where applicable, all individual features presented in the embodiments may be combined and / or exchanged without departing from the scope of the invention.

[0147] List of reference symbols

[0148] 1 sensor device

[0149] 5 Sensor arrangement

[0150] 6 carriers

[0151] 7 Enclosure

[0152] 20 conductors

[0153] 21 First Ladder Path

[0154] 22 Second Ladder Path

[0155] 23 Height of a ladder path

[0156] 24 Width of a ladder path

[0157] 24* Width of the undivided conductor

[0158] 25 Height of the undivided conductor

[0159] 26 Outside

[0160] 27 Inside

[0161] 28 Lateral side

[0162] 29 Lateral side

[0163] 30 Longitudinal direction

[0164] 31 Transverse direction

[0165] 32 Altitude direction

[0166] 33 Distance to the assigned conductor path

[0167] 33* Distance to the other conductor path

[0168] 34 Central longitudinal axis

[0169] 35 Length of conductor paths

[0170] 36 route

[0171] 37 Distance to

[0172] 38 Distance to the axis of symmetry in height direction

[0173] 38* Distance to the central longitudinal axis in the transverse direction

[0174] 39 Distance

[0175] 41 First magnetic field (formed by current flow in the first conductor path)

[0176] 42 Second magnetic field (formed by current flow in the second conductor path)

[0177] 43 Zero field area

[0178] 50 distance in height direction

[0179] 51 Distance in longitudinal direction

[0180] 52 Center

[0181] 60 First side of the carrier

[0182] 62 Second side of the carrier

[0183] 70 Enclosure

[0184] 72 recess

[0185] 80-82 areas of the ladder paths

[0186] 83 Direction of current flow

[0187] 84 Measuring direction

[0188] 90 side flank

[0189] 91 Middle section

[0190] 100 vehicle batteries

[0191] 110 Battery module

[0192] P1 First Position

[0193] P2 Second Position

[0194] S11-S14 Magnetic field sensor on the first position P1

[0195] S21-S24 Magnetic field sensor on the second position P2

[0196] L11-L14 Longitudinal axis of a magnetic field sensor at the first position P1

[0197] L21-L24 Longitudinal axis of a magnetic field sensor at the second position P2 SP11-SP22 Intersection of two longitudinal axes a Angle of the longitudinal axis to the longitudinal direction

Claims

Claims 1. Sensor device (1) for determining a current flowing through a current conductor (20), preferably for determining a current flowing through a busbar of a vehicle battery (100), comprising a current conductor (20) for conducting a current along a longitudinal direction (30) and a sensor arrangement (5) of magnetic field sensors (S11-S24) for detecting a magnetic field formed around the current conductor (20) via current flow in the current conductor (20), characterized in that the current conductor (20) is divided in the region of the sensor arrangement (5) into at least two conductor paths (21, 22) running in the longitudinal direction (30) and spaced apart from one another.

2. Sensor device (1) according to claim 1, characterized in that at least one magnetic field sensor (S11-S24) of the sensor arrangement (5) is arranged between the conductor paths (21, 22), wherein preferably at least two magnetic field sensors (S11-S24) are arranged between the conductor paths (21, 22).

3. Sensor device (1) according to claim 1 or 2, characterized in that all magnetic field sensors (S11-S24) of the sensor arrangement (5) are arranged between the conductor paths (21, 22).

4. Sensor device (1) according to claim 1 or 2, characterized in that at least one magnetic field sensor (S11-S24) of the sensor arrangement (5) is arranged outside the conductor paths (21, 22) with respect to the conductor paths (21, 22).

5. Sensor device (1) according to claim 1 or 4, characterized in that all magnetic field sensors (S11-S24) of the sensor arrangement (5) are arranged outside the conductor paths (21, 22) with respect to the conductor paths (21, 22), wherein preferably at least one magnetic field sensor (S11-S24) is arranged on an outer side (26) of the first conductor path (21) and / or at least one magnetic field sensor (S11-S24) is arranged on an outer side (26) of the second conductor path (22).

6. Sensor device (1) according to one of the preceding claims, characterized in that at least one magnetic field sensor (S11-S24) of the sensor arrangement (5) is assigned to one conductor path (21, 22) and preferably at least one magnetic field sensor (S11-S24) of the sensor arrangement (5) is assigned to the other conductor path (22).

7. Sensor device (1) according to one of the preceding claims, characterized in that at least one magnetic field sensor (S11-S24) of the sensor arrangement (5) is arranged in a zero field region (43) between the first conductor path (21) and the second conductor path (22).

8. Sensor device (1) according to claim 1, characterized in that at least one magnetic field sensor (S11-S24) of the sensor arrangement (5) is arranged on a lateral side (28, 29) of one of the conductor paths (21, 22) with respect to the conductor paths (21, 22), wherein preferably at least one magnetic field sensor (S11-S24) is arranged on a lateral side (28, 29) of the first conductor path (21) and at least one magnetic field sensor (S11-S24) is arranged on a lateral side (28, 29) of the second conductor path (22).

9. Sensor device (1) according to one of the preceding claims, characterized in that at least two magnetic field sensors (S11-S24) of the sensor arrangement (5) are arranged on a common carrier (6), preferably a common printed circuit board, and / or at least one magnetic field sensor (S11-S24) is arranged on a first side (60) of the common carrier (6) and at least one magnetic field sensor (S11-S24) is arranged on a second side (61) of the common carrier (6) opposite the first side (60), and / or that at least one magnetic field sensor (S11-S24) is at least partially accommodated in a housing (7), preferably at least partially embedded in a potting compound body.

10. Sensor device (1) according to one of the preceding claims, characterized in that the sensor arrangement (5) comprises at least two magnetic field sensors (S11-S24) which are arranged at the same position (P1, P2) with respect to the longitudinal direction (30), and / or the sensor arrangement (5) comprises at least one magnetic field sensor (S11-S14) arranged at a first position (P1) with respect to the longitudinal direction (30) and at least one magnetic field sensor (S21-S24) arranged at a second position (P2) with respect to the longitudinal direction (30).

11. Sensor device (1) according to one of the preceding claims, characterized in that at least two magnetic field sensors (S11-S24) of the sensor arrangement (5) are arranged with an angle (α) of preferably the same amount to the longitudinal direction (30), and / or that at least two magnetic field sensors (S11-S24) are oriented parallel to one another, and / or that at least two magnetic field sensors (S11-S24) are oriented perpendicular to the longitudinal direction (30).

12. Sensor device (1) according to one of the preceding claims, characterized in that the magnetic field sensors (S11-S24) of the sensor arrangement (5) are designed as coils, and / or that the current conductor (20) is a busbar for conducting current in a vehicle battery (100), and / or that at least two magnetic field sensors (S11-S24), preferably exactly two or exactly four magnetic field sensors (S11-S24), of the sensor arrangement (5) are connected to form a sensor path and / or the sensor arrangement (5) comprises at least two sensor paths.

13. Vehicle battery (100) for providing the primary drive energy of an electric vehicle, comprising at least one battery module (110) for providing an electrical voltage, characterized by a sensor device (1) according to one of the preceding claims.

Images