EP2965103A1 - Current sensor device with integrated clamping device and mass element - Google Patents

Current sensor device with integrated clamping device and mass element

Info

Publication number
EP2965103A1
EP2965103A1 EP14702790.8A EP14702790A EP2965103A1 EP 2965103 A1 EP2965103 A1 EP 2965103A1 EP 14702790 A EP14702790 A EP 14702790A EP 2965103 A1 EP2965103 A1 EP 2965103A1
Authority
EP
European Patent Office
Prior art keywords
current sensor
sensor device
current
measuring
clamping device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14702790.8A
Other languages
German (de)
French (fr)
Inventor
Henryk Frenzel
Vinzenz Sauerer
Michael Weinacht
Christine Spörl
Manfred Frimberger
Wolfgang Weigert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Continental Automotive GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP2965103A1 publication Critical patent/EP2965103A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/364—Battery terminal connectors with integrated measuring arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
    • G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/374—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with means for correcting the measurement for temperature or ageing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3828—Arrangements for monitoring battery or accumulator variables, e.g. SoC using current integration

Definitions

  • the invention relates to a current sensor device for measuring a current, in particular for measuring a battery current in motor vehicles, according to the preamble of claim 1 and a motor vehicle with a current sensor device according to the invention.
  • electric motors are used for a variety of functions, be it as the main drive unit in an electric car or be it z. B. as a drive unit of an electric power steering.
  • the use of electric motors also often requires the use of current sensors to accurately measure the supply current supplied to the electric motors or charge currents supplied to the batteries.
  • interfaces are used inter alia to attach the electrical connections, such. B. data cable or ground. Furthermore, there is also an interface to which a mechanical support is attached to securely mount the housing within the motor vehicle.
  • the object of the invention is therefore to show a current sensor device that can be produced with low production and cost.
  • the object is achieved by means of a current sensor device of the aforementioned type, wherein the clamping device, the resistance element and the mass element are integrally formed.
  • the invention is based on the basic idea of integrally forming the functionally essential elements of a current sensor device, whereby the assembly of the individual elements with each other is unnecessary.
  • the mounting of the shunt with a clamping device and a mass element is unnecessary.
  • the clamping device, the WiderStandselement and the mass element are integrated in a one-piece component and firmly connected.
  • the one-piece design allows a simple automated production of the current sensor device with a low production cost. Furthermore, a particularly cost-effective current sensor device can be produced in this way.
  • the clamping device and the mass element are made of an electrically conductive material and are directly with the WiderStandselement mechanically and electrically connected to a one-piece part.
  • the resistance element can be attached to the clamping device and the mass element cohesively, z. B. by welding or soldering, are connected to a one-piece part.
  • the material of the resistive element may differ from the material of the clamping device and the mass element. However, it is also conceivable monolithic training of the three elements of a single piece or part.
  • the clamping device and the mass element are to be seen in the context of the invention on the one hand as connections, via which the current sensor device is switchable in a current path. The mass element is therefore to be understood in the sense of a vehicle connection.
  • the mass element is electrically connected to a zero potential.
  • the mass element is connected to a different electrical potential, for example, with the connection of an alternator or other consumer.
  • the current sensor device could be such. B. between a plus pole of a battery and an alternator, wherein the clamping device with the positive pole and the mass element would be electrically connected to the alternator. It is also possible to connect the current sensor device between a negative terminal of a battery and a ground. In such a case, the mass element would be electrically connected to the ground.
  • the current sensor device is further developed in that the clamping device, the resistance element and the mass element are formed from a one-piece, in particular from a single, sheet metal element.
  • the clamping device, the WiderStandselement and the mass element are integrally formed in the one-piece sheet metal element.
  • the sheet metal element has a basic shape, which can be completed by further processing, for example by bending, to the final shape of the current sensor device.
  • the current sensor device is particularly efficient and inexpensive to produce.
  • the absence of a WiderStandselement of a separate material leads to a substantial simplification of the manufacturing process and reduction of manufacturing costs.
  • the voltage or the voltage drop is measured at two points on the sheet metal element. Deviations in the electrical resistance of the sheet metal element By temperature changes can be considered and compensated by in the evaluation, so that for many applications, a sufficiently accurate current measurement is possible.
  • the resistance element is designed integrated in the form of a measuring section in the sheet metal element.
  • the limited to a portion of the sheet member measuring range can be optimized in this way in terms of electrical resistance in order to achieve a more precise current measurement.
  • an optimization possibility with respect to the current measurement is to provide the measuring section with recesses.
  • the electrical resistance within the measuring section can be changed as desired.
  • the electrical resistance of the measuring section can be increased.
  • An optimization variant according to an embodiment of the current sensor device according to the invention has proven particularly advantageous, in which the measuring section has trough-shaped recesses at the edge regions.
  • an embodiment of the current sensor device is advantageously comprising a measuring unit, wherein the measuring unit has a temperature sensor.
  • the measuring unit is preferably thermally coupled to the sheet metal element.
  • the temperature of the sheet metal element can be determined by means of the temperature sensor. Based on the current temperature and material properties, it is possible to calculate the influence of temperature on the electrical resistance of the resistive element. Thus, the influence of temperature on the measured voltage drop in an evaluation process can be taken into account in order to determine the actual current flow more precisely.
  • the clamping device is designed as a battery terminal.
  • the direct connection of the current sensor device to a battery terminal allows an immediate thermal coupling of the current sensor device to the battery to measure the temperature at the battery terminal.
  • the temperature of the battery can be determined very precisely to estimate the condition of the battery.
  • switching off the internal combustion engine can therefore be avoided if the battery is not yet in an optimal operating temperature.
  • the current sensor device is particularly easy electrically connected to a power source.
  • the sheet metal element With regard to the materials, according to a further embodiment of the current sensor device according to the invention, it has proven advantageous to carry out the sheet metal element with a material containing an alloy with the constituents copper, iron and phosphorus, in particular with a composition CuFeP.
  • a material containing an alloy with the constituents copper, iron and phosphorus in particular with a composition CuFeP.
  • the current sensor device according to the invention according to a further embodiment, a measuring unit, which is arranged in the measuring section, wherein the measuring unit is electrically coupled to the resistor element to measure the voltage drop between two voltage measuring points in the measuring section.
  • the current sensor device preferably provides a connection device which has connection pins or wireless transmission elements for transmitting measurement data.
  • an embodiment of the current sensor device according to the invention has proved to be advantageous, in which the current sensor device is produced by means of a punch-bending or a stamped-deep-drawing process.
  • an embodiment of the current sensor device according to the invention is advantageous in which the sheet metal element has a substantially L-shaped portion.
  • the use of a sheet-shaped L-shaped section to utilize the space has proven to be advantageous.
  • an embodiment has proved to be advantageous in which the clamping device is arranged on the short part of the L-shaped section.
  • Another aspect of the invention relates to a motor vehicle having a current sensor device according to one of the preceding embodiments. Further preferred embodiments will become apparent from the subclaims and the following description of an embodiment with reference to figures.
  • FIG. 1 is a perspective view of a first embodiment of the current sensor device according to the invention
  • FIG. 2 is a perspective view of a second embodiment of the current sensor device according to the invention.
  • Fig. 3 is a perspective view of a third embodiment of the current sensor device according to the invention.
  • Fig. 4 is a perspective view of a fourth embodiment of the current sensor device according to the invention.
  • FIG. 1 shows a first exemplary embodiment of the current sensor device 1 according to the invention for measuring a current.
  • the current sensor device 1 is shown from the bottom.
  • the current sensor device 1 has a clamping device 20 for attaching the current sensor device 1 to a holding body.
  • the clamping device 20 is designed as a battery terminal and can be connected to a battery terminal of a car battery.
  • the current sensor device 1 has an electrical resistance element 40, on which the current can be determined via a voltage or a voltage drop across two voltage measuring points 42a, 42b.
  • the current sensor device 1 can be electrically coupled to a zero potential or ground via an electrical mass element 60.
  • the clamping device 20, the WiderStandselement 40 and the mass element 60 are integrally formed. advantageously, the clamping device 20, the resistance element 40 and the mass element 60 are formed from a one-piece sheet metal element 80.
  • the resistance element 40 may be manufactured from a separate part and to connect it in each case to the clamping device 20 and the mass element 60. Conceivable are cohesive connection forms such. B. welding.
  • the material of the resistance element 40 may be selected such that the electrical resistance of the resistance element 40 is largely independent of the temperature at the resistance element.
  • the sheet metal element 80 is punched out of a sheet and formed by means of a punch-bending process to the shape shown in Figure 1.
  • a stamped-deep-drawing process it is also conceivable to reshape the sheet metal element by means of a stamped-deep-drawing process to achieve the desired shape.
  • a copper alloy having the composition CuFeP as a starting material is used.
  • the aforementioned alloy has a balance between a suitable electrical conductivity and the strength of the material and is particularly well suited for the intended purpose.
  • other alloys with the constituents copper, iron and phosphorus and other conductive metals are also conceivable.
  • the clamping device 20 has an elongated shape in the original unflexed state of the sheet metal element 80 and is bent in a circle to a clamping device 20 so that it can be connected to a battery terminal of a motor vehicle.
  • the clamping device 20 is aligned perpendicular to the main surface of an L-shaped portion of the current sensor device 1.
  • the clamping device 20 has in the transition region to the L-shaped portion Biegeaussparept 21a, 21b to the vertical bending of the clamping device 20 to the L-shaped Section to facilitate.
  • the clamping device 20 has two free ends 22a, 22b, each having a bore 23a, 23b.
  • a fastening means 24 here in the form of a screw with a nut performed to attach the current sensor device to a holding body, here the battery terminal.
  • the free ends 22a, 22b are bent to be slightly oblique to the major surface of the L-shaped portion.
  • the substantially L-shaped portion with the resistance element 40 and the mass member 60 connects, wherein the clamping device 20 connects to the short part of the L-shaped portion.
  • the resistance element 40 is designed to be integrated in the form of a measuring section 41 in the sheet metal element, which are indicated schematically in the figures by the dashed lines.
  • the measuring section 41 can be understood as a region which is shaped separately in terms of electrical resistance and which is limited approximately by two voltage measuring points 42a, 42b.
  • recesses 43a, 43b are provided.
  • the trough-shaped recesses 43a, 43b are provided on the edge regions of the sheet metal element 80.
  • the recesses 43a, 43b, 43c are arranged symmetrically to the longitudinal axis of the measuring section 41 and advantageously have rounded edges.
  • the voltage measuring points 42a, 42b are outside the region lying to the current direction I, in which the output recesses 43a, 43b, 43c are located. During a current flow through the sheet metal element 80, the current can then be determined via the voltage which is measured at the voltage measuring points 42a, 42b and the known electrical resistance R of the measuring section 41.
  • the measuring portion 41 is covered by a waterproof housing 44, wherein the housing does not have to be waterproof.
  • the housing 44 comprises the entire cross-section of the sheet-metal element 80 in the region of the measuring section 41. It has a watertight opening 45, through which a cable 46 can be made in order to transmit the measured data.
  • a measuring unit 47 it is conceivable to expand the current sensor device by a measuring unit 47.
  • the measuring unit is arranged in the measuring section 41, wherein the measuring unit is electrically coupled to the resistance element 40.
  • the measuring unit 47 has inter alia a temperature sensor and is thermally coupled to the resistance element 40 in the region of the measuring section 41.
  • the measuring unit 47 for measuring a voltage drop between two voltage measuring points 42a, 42b is electrically connected to the resistance element 40.
  • connection devices 48 via which the measurement data can be transmitted, are attached to the measuring unit 47 or the resistance element 40.
  • the connection devices 48 are formed in the embodiment of Figure 4 as pins 48 and attached to the measuring unit 47.
  • the current sensor device Via the closable opening 45, which may optionally be watertight, the current sensor device can then be connected to an evaluation unit by means of a plug (not shown here). It would also be conceivable to transmit elements for wireless transmission of the measured data to the Measuring unit 47 to install.
  • Both the measuring unit 47 and the connection devices are arranged within the housing 44 for better protection against external influences.
  • the mass member 60 is disposed at the free end of the L-shaped portion.
  • the free end 61 of the L-shaped portion has a bore 62 through which a bolt 63 or a screw is feasible.
  • the current sensor device 1 By connecting the clamping device 20 to a terminal of a battery and the mass element 60 to a consumer, the current sensor device 1 is connected in an electrical current path, so that a current can flow through the sheet metal element 80. Alternatively, it is provided to electrically connect the clamping device with the connection of a battery and the mass element with a ground. In the area of the measuring section 41, a voltage or voltage drop prevailing over the measuring section 41 is measured at the voltage measuring points 42a, 42b, via which the current can then be determined.
  • the direct connection of the current sensor device to the terminal of the battery has the advantage that the temperature at the resistance element 40 is approximately the temperature at the terminal of the battery. In this way, the temperature of the battery can be determined to determine the state of the battery. Furthermore, the temperature at the resistance element 40 can be measured by means of the temperature sensor. In this way, the temperature influence on the electrical resistance of the resistance element 40 can be precisely determined in order to calculate this influence from the current measurement.
  • the invention has the particular advantage that it is particularly inexpensive and low due to the one-piece construction Production costs can be produced.
  • the shape of the current sensor device 1 according to the exemplary embodiments is particularly well suited for use in a motor vehicle for measuring the current delivered by a battery.
  • the application of the current sensor device is not limited thereto.

Abstract

The invention relates to a current sensor device (1) for measuring a current, in particular for measuring a battery current in motor vehicles. Said device comprises a clamping device (20) for fixing the current sensor device (1) to a maintaining body, an electric resistance element (40) on which the current (I) can be measured by means of a voltage, and an electric mass element (60) by means of which the current sensor device (1) can be electrically coupled to a zero potential. Said current sensor device is characterized in that the clamping device (20), the resistance element (40) and the mass element (60) are integrally formed.

Description

Stromsensorvorrichtung mit integrierter Klemmeinrichtung und Masseelement Current sensor device with integrated clamping device and mass element
Die Erfindung betrifft eine Stromsensorvorrichtung zum Messen eines Stroms, insbesondere zum Messen eines Batteriestroms in Kraftfahrzeugen, nach dem Oberbegriff des Anspruchs 1 und ein Kraftfahrzeug mit einer erfindungsgemäßen Stromsensorvorrichtung . The invention relates to a current sensor device for measuring a current, in particular for measuring a battery current in motor vehicles, according to the preamble of claim 1 and a motor vehicle with a current sensor device according to the invention.
In Kraftfahrzeugen werden elektrischen Motoren für unterschiedlichste Funktionen eingesetzt, sei es als Hauptantriebseinheit in einem Elektroauto oder sei es z. B. als Antriebseinheit einer elektrischen Servolenkung. Der Einsatz von elektrischen Motoren erfordert auch in vielen Fällen den Einsatz von Stromsensoren zur genauen Messung des an die elektrischen Motoren zugeführten Versorgungsstroms oder an die Batterien zugeführten Ladeströme. In motor vehicles electric motors are used for a variety of functions, be it as the main drive unit in an electric car or be it z. B. as a drive unit of an electric power steering. The use of electric motors also often requires the use of current sensors to accurately measure the supply current supplied to the electric motors or charge currents supplied to the batteries.
Bekannt sind auf den Markt erhältliche Stromsensoren, die als eine Einheit in einem Gehäuse den Sensor enthalten und mit Schnittstellen versehen sind. Die Schnittstellen dienen unter anderem dazu, die elektrischen Anschlüsse anzubringen, wie z. B. Datenkabel oder Masse. Des Weiteren gibt es auch eine Schnittstelle, an die eine mechanische Halterung angebracht wird, um das Gehäuse fest innerhalb des Kraftfahrzeugs zu montieren . Are known on the market available current sensors that contain the sensor as a unit in a housing and are provided with interfaces. The interfaces are used inter alia to attach the electrical connections, such. B. data cable or ground. Furthermore, there is also an interface to which a mechanical support is attached to securely mount the housing within the motor vehicle.
Eine solche Gestaltung hat zwar den Vorteil, dass die einzelnen Teile, wie z. B. Halterung, Sensor und Masseelement von unterschiedlichen Quellen bezogen werden können. Nachteilig ist jedoch der hohe Montageaufwand der einzelnen Teile. Aufgabe der Erfindung ist es daher eine Stromsensorvorrichtung aufzuzeigen, die mit geringem Herstellungs- und Kostenaufwand herstellbar ist. Although such a design has the advantage that the individual parts, such. B. holder, sensor and mass element can be obtained from different sources. However, a disadvantage is the high assembly costs of the individual parts. The object of the invention is therefore to show a current sensor device that can be produced with low production and cost.
Die Aufgabe wird gelöst mittels einer Stromsensorvorrichtung der eingangs genannten Art, wobei die Klemmeinrichtung, das Widerstandselement und das Massenelement einstückig ausgebildet sind . The object is achieved by means of a current sensor device of the aforementioned type, wherein the clamping device, the resistance element and the mass element are integrally formed.
Der Erfindung liegt der Grundgedanke zugrunde, die funktionswesentlichen Elemente einer Stromsensorvorrichtung einstückig auszubilden, wodurch die Montage der einzelnen Elemente miteinander überflüssig wird. Im Gegensatz zum Stand der Technik wird die Montage des Shunts mit einer Klemmeinrichtung und einem Massenelement überflüssig. Die Klemmeinrichtung, das WiderStandselement und das Massenelement sind in einem einstückigen Bauteil integriert und fest miteinander verbunden. Die einstückige Ausbildung ermöglicht eine einfache automatisierte Herstellung der Stromsensorvorrichtung mit einem geringen Herstellungsaufwand . Des Weiteren ist auf diese Weise eine besonders kostengünstige Stromsensorvorrichtung herstellbar . The invention is based on the basic idea of integrally forming the functionally essential elements of a current sensor device, whereby the assembly of the individual elements with each other is unnecessary. In contrast to the prior art, the mounting of the shunt with a clamping device and a mass element is unnecessary. The clamping device, the WiderStandselement and the mass element are integrated in a one-piece component and firmly connected. The one-piece design allows a simple automated production of the current sensor device with a low production cost. Furthermore, a particularly cost-effective current sensor device can be produced in this way.
Die Klemmeinrichtung und das Massenelement sind aus einem elektrisch leitfähigen Material gefertigt und sind unmittelbar mit dem WiderStandselement mechanisch und elektrisch zu einem einstückigen Teil miteinander verbunden. Das WiderStandselement kann dabei an die Klemmeinrichtung und das Massenelement Stoffschlüssig, z. B. mittels Schweißen oder Löten, zu einem einstückigen Teil verbunden werden. Das Material des Widerstandselements kann sich von dem Material der Klemmeinrichtung und des Massenelements unterscheiden. Denkbar ist jedoch auch eine monolithische Ausbildung der drei Elemente aus einem einzigen Stück bzw. Teil. Die Klemmeinrichtung und das Massenelement sind im Sinne der Erfindung zum einen als Anschlüsse zu sehen, über die die Stromsensorvorrichtung in einen Strompfad schaltbar ist. Das Massenelement ist daher im Sinne eines Fahrzeuganschlusses zu verstehen. Üblicherweise ist das Massenelement dabei mit einem Nullpotential elektrisch verbunden. Dies schließt aber nicht aus, dass das Massenelement mit einem anderen elektrischen Potential verbunden wird, bspw. mit dem Anschluss einer Lichtmaschine oder eines anderen Verbrauchers. Die Stromsensorvorrichtung könnte so z. B. zwischen einem Pluspol einer Batterie und einer Lichtmaschine verschaltet sein, wobei die Klemmeinrichtung mit dem Pluspol und das Massenelement mit der Lichtmaschine elektrisch verbunden wären. Ebenso ist es möglich, die Stromsensorvorrichtung zwischen einem Minus-Anschluss einer Batterie und einer Masse bzw. Ground zu verschalten. In einem solchen Fall wäre das Massenelement mit der Masse elektrisch verbunden . The clamping device and the mass element are made of an electrically conductive material and are directly with the WiderStandselement mechanically and electrically connected to a one-piece part. The resistance element can be attached to the clamping device and the mass element cohesively, z. B. by welding or soldering, are connected to a one-piece part. The material of the resistive element may differ from the material of the clamping device and the mass element. However, it is also conceivable monolithic training of the three elements of a single piece or part. The clamping device and the mass element are to be seen in the context of the invention on the one hand as connections, via which the current sensor device is switchable in a current path. The mass element is therefore to be understood in the sense of a vehicle connection. Usually, the mass element is electrically connected to a zero potential. However, this does not exclude that the mass element is connected to a different electrical potential, for example, with the connection of an alternator or other consumer. The current sensor device could be such. B. between a plus pole of a battery and an alternator, wherein the clamping device with the positive pole and the mass element would be electrically connected to the alternator. It is also possible to connect the current sensor device between a negative terminal of a battery and a ground. In such a case, the mass element would be electrically connected to the ground.
Vorteilhafterweise wird die Stromsensorvorrichtung dadurch weitergebildet, dass die Klemmeinrichtung, das Widerstandselement und das Massenelement aus einem einstückigen, insbesondere aus einem einzigen, Blechelement ausgebildet sind. Die Klemmeinrichtung, das WiderStandselement und das Massenelement sind in dem einstückigen Blechelement integriert ausgebildet. Das Blechelement weist eine Grundform auf, die durch weitere Verarbeitung, bspw. durch Biegen, zu der Endform der Stromsensorvorrichtung vervollständigbar ist . Auf diese Weise ist die Stromsensorvorrichtung besonders effizient und kostengünstig herstellbar. Der Verzicht auf ein WiderStandselement aus einem gesonderten Material führt zu einer wesentlichen Vereinfachung des Herstellungsprozesses und Verringerung der Herstellungskosten. Zum Messen des Stroms wird die Spannung bzw. der Spannungsabfall an zwei Punkten auf dem Blechelement gemessen. Abweichungen beim elektrischen Widerstand des Blechelements durch Temperaturanderungen können dabei durch im Auswerteverfahren berücksichtigt und kompensiert werden, so dass für viele Anwendungsfälle eine ausreichend genaue Strommessung möglich ist. Advantageously, the current sensor device is further developed in that the clamping device, the resistance element and the mass element are formed from a one-piece, in particular from a single, sheet metal element. The clamping device, the WiderStandselement and the mass element are integrally formed in the one-piece sheet metal element. The sheet metal element has a basic shape, which can be completed by further processing, for example by bending, to the final shape of the current sensor device. In this way, the current sensor device is particularly efficient and inexpensive to produce. The absence of a WiderStandselement of a separate material leads to a substantial simplification of the manufacturing process and reduction of manufacturing costs. For measuring the current, the voltage or the voltage drop is measured at two points on the sheet metal element. Deviations in the electrical resistance of the sheet metal element By temperature changes can be considered and compensated by in the evaluation, so that for many applications, a sufficiently accurate current measurement is possible.
Besonders vorteilhaft ist eine Ausführungsform der erfindungsgemäßen Stromsensorvorrichtung, bei der das Widerstandselement in Form eines Messabschnitts in dem Blechelement integriert ausgebildet ist. Der auf einen Abschnitt des Blechelements begrenzte Messbereich kann auf diese Weise im Hinblick auf den elektrischen Widerstand optimiert werden, um eine präzisere Strommessung zu erreichen. Particularly advantageous is an embodiment of the current sensor device according to the invention, in which the resistance element is designed integrated in the form of a measuring section in the sheet metal element. The limited to a portion of the sheet member measuring range can be optimized in this way in terms of electrical resistance in order to achieve a more precise current measurement.
Eine Optimierungsmöglichkeit hinsichtlich der Strommessung besteht gemäß einer vorteilhaften Ausführungsform der erfindungsgemäßen Stromsensorvorrichtung darin, den Messabschnitt mit Ausnehmungen zu versehen. Durch hinzufügen definierter Ausnehmungen ist der elektrische Widerstand innerhalb des Messabschnitts in gewünschter Weise veränderbar. Insbesondere kann auf diese Weise der elektrische Widerstand des Messabschnittes erhöht werden. According to an advantageous embodiment of the current sensor device according to the invention, an optimization possibility with respect to the current measurement is to provide the measuring section with recesses. By adding defined recesses, the electrical resistance within the measuring section can be changed as desired. In particular, in this way the electrical resistance of the measuring section can be increased.
Als besonders vorteilhaft hat sich eine Optimierungsvariante gemäß einer Ausführungsform der erfindungsgemäßen Stromsensorvorrichtung herausgestellt, bei dem der Messabschnitt muldenförmige Ausnehmungen an den Kantenbereichen aufweist. An optimization variant according to an embodiment of the current sensor device according to the invention has proven particularly advantageous, in which the measuring section has trough-shaped recesses at the edge regions.
Ebenso ist eine Ausführungsform der erfindungsgemäßen Stromsensorvorrichtung vorteilhaft die eine Messeinheit aufweist, wobei die Messeinheit einen Temperatursensor aufweist. Die Messeinheit ist vorzugsweise mit dem Blechelement thermisch gekoppelt. Auf diese Weise ist mittels des Temperatursensors die Temperatur des Blechelements ermittelbar. Auf Basis der aktuellen Temperatur und der Materialeigenschaften ist es möglich den Einfluss der Temperatur auf den elektrischen Wiederstand des Widerstandselements zu berechnen. So kann Temperatureinfluss auf den gemessenen Spannungsabfall in einem Auswerteverfahren berücksichtigt werden, um den tatsächlichen Stromfluss präziser zu ermitteln. Likewise, an embodiment of the current sensor device according to the invention is advantageously comprising a measuring unit, wherein the measuring unit has a temperature sensor. The measuring unit is preferably thermally coupled to the sheet metal element. In this way, the temperature of the sheet metal element can be determined by means of the temperature sensor. Based on the current temperature and material properties, it is possible to calculate the influence of temperature on the electrical resistance of the resistive element. Thus, the influence of temperature on the measured voltage drop in an evaluation process can be taken into account in order to determine the actual current flow more precisely.
Besonders vorteilhaft ist hierbei eine Ausführungsform der erfindungsgemäßen Stromsensorvorrichtung, bei der die Klemmeinrichtung als eine Batterieklemme ausgebildet ist. Der direkte Anschluss der Stromsensorvorrichtung an einen Batterieanschluss ermöglicht eine unmittelbare thermische Kopplung der Stromsensorvorrichtung mit der Batterie, um die Temperatur am Batterieanschluss zu messen. Auf diese Weise ist die Temperatur der Batterie besonders präzise ermittelbar, um den Zustand der Batterie einzuschätzen. Bei einem Einsatz der Batterie in einem Kraftfahrzeug kann daher ein Ausschalten des Verbrennungsmotors vermieden werden, wenn die Batterie sich noch nicht in einer optimalen Betriebstemperatur befindet. Ferner ist auf diese Weise die Stromsensorvorrichtung besonders einfach elektrisch mit einer Stromguelle verbindbar. Particularly advantageous here is an embodiment of the current sensor device according to the invention, in which the clamping device is designed as a battery terminal. The direct connection of the current sensor device to a battery terminal allows an immediate thermal coupling of the current sensor device to the battery to measure the temperature at the battery terminal. In this way, the temperature of the battery can be determined very precisely to estimate the condition of the battery. When using the battery in a motor vehicle, switching off the internal combustion engine can therefore be avoided if the battery is not yet in an optimal operating temperature. Furthermore, in this way, the current sensor device is particularly easy electrically connected to a power source.
Hinsichtlich der Materialien hat es sich nach einer weiteren Ausführungsform der erfindungsgemäßen Stromsensorvorrichtung als vorteilhaft erwiesen, das Blechelement mit einem Material enthaltend eine Legierung mit den Bestandteilen Kupfer, Eisen und Phosphor, insbesondere mit einer Zusammensetzung CuFeP, auszuführen. Mittels dieser Materialien konnte sowohl ein optimaler Stromfluss als auch eine optimale mechanische Festigkeit zum Befestigen der Stromsensorvorrichtung im Fahrzeug erreicht werden . With regard to the materials, according to a further embodiment of the current sensor device according to the invention, it has proven advantageous to carry out the sheet metal element with a material containing an alloy with the constituents copper, iron and phosphorus, in particular with a composition CuFeP. By means of these materials, both an optimal current flow and an optimal mechanical strength for securing the current sensor device in the vehicle could be achieved.
Vorteilhafterweise weist die erfindungsgemäße Stromsensorvorrichtung nach einer weiteren Ausführungsform eine Messeinheit auf, die im Messabschnitt angeordnet ist, wobei die Messeinheit mit dem WiderStandselement elektrisch gekoppelt ist, um den Spannungsabfall zwischen zwei Spannungsmesspunkten im Messabschnitt zu messen. Advantageously, the current sensor device according to the invention according to a further embodiment, a measuring unit, which is arranged in the measuring section, wherein the measuring unit is electrically coupled to the resistor element to measure the voltage drop between two voltage measuring points in the measuring section.
Vorzugsweise sieht die erfindungsgemäße Stromsensorvorrichtung nach einer vorteilhaften Ausführungsform eine Anschlusseinrichtung vor, die Anschlussstifte oder kabellose Sendeelemente zum Übertragen von Messdaten aufweist. According to an advantageous embodiment, the current sensor device according to the invention preferably provides a connection device which has connection pins or wireless transmission elements for transmitting measurement data.
Des Weiteren hat sich eine Ausführungsform der erfindungsgemäßen Stromsensorvorrichtung als vorteilhaft erweisen, bei dem die Stromsensorvorrichtung mittels eines Stanz-Biege oder eines Stanz-Tiefzieh-Verfahrens hergestellt ist. Mittels dieser Verfahren ist eine besonders präzise und zugleich gut beherrschbare Verarbeitung des Blechelements möglich. Furthermore, an embodiment of the current sensor device according to the invention has proved to be advantageous, in which the current sensor device is produced by means of a punch-bending or a stamped-deep-drawing process. By means of these methods, a particularly precise and at the same time easy to handle processing of the sheet metal element is possible.
Ferner ist eine Ausführungsform der erfindungsgemäßen Stromsensorvorrichtung vorteilhaft , bei dem das Blechelement einen im Wesentlichen L-förmigen Abschnitt aufweist. Für den Einsatz in Kraftfahrzeugen, insbesondere für Batterien in Kraftfahrzeugen, hat sich die Verwendung eines blechförmigen L-förmigen Abschnitts zur Ausnutzung des Bauraums als vorteilhaft erwiesen. Furthermore, an embodiment of the current sensor device according to the invention is advantageous in which the sheet metal element has a substantially L-shaped portion. For use in motor vehicles, in particular for batteries in motor vehicles, the use of a sheet-shaped L-shaped section to utilize the space has proven to be advantageous.
Für eine verbesserte Stabilität der Stromsensorvorrichtung hat sich eine Ausführungsform als vorteilhaft erwiesen, bei der die Klemmeinrichtung am kurzen Teil des L-förmigen Abschnitts angeordnet ist. For an improved stability of the current sensor device, an embodiment has proved to be advantageous in which the clamping device is arranged on the short part of the L-shaped section.
Ein weiterer Aspekt der Erfindung betrifft ein Kraftfahrzeug mit einer Stromsensorvorrichtung nach einem der vorstehenden Ausführungsformen . Weitere bevorzugte Ausführungsformen ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung eines Ausführungsbeispiels an Hand von Figuren. Another aspect of the invention relates to a motor vehicle having a current sensor device according to one of the preceding embodiments. Further preferred embodiments will become apparent from the subclaims and the following description of an embodiment with reference to figures.
Es zeigen Show it
Fig. 1 eine perspektivische Ansicht auf ein erstes Ausführungsbeispiel der erfindungsgemäßen Stromsensorvorrichtung, 1 is a perspective view of a first embodiment of the current sensor device according to the invention,
Fig. 2 eine perspektivische Ansicht auf ein zweites Ausführungsbeispiel der erfindungsgemäßen Stromsensorvorrichtung, 2 is a perspective view of a second embodiment of the current sensor device according to the invention,
Fig. 3 eine perspektivische Ansicht auf ein drittes Ausführungsbeispiel der erfindungsgemäßen Stromsensorvorrichtung, und Fig. 3 is a perspective view of a third embodiment of the current sensor device according to the invention, and
Fig. 4 eine perspektivische Ansicht auf ein viertes Ausführungsbeispiel der erfindungsgemäßen Stromsensorvorrichtung. Fig. 4 is a perspective view of a fourth embodiment of the current sensor device according to the invention.
Figur 1 zeigt ein erstes Ausführungsbeispiel der erfindungsgemäßen Stromsensorvorrichtung 1 zum Messen eines Stroms. In dieser Darstellung wird die Stromsensorvorrichtung 1 von der Unterseite gezeigt. Die Stromsensorvorrichtung 1 weist eine Klemmeinrichtung 20 zum Anbringen der Stromsensorvorrichtung 1 an einen Haltekörper auf. Die Klemmeinrichtung 20 ist als eine Batterieklemme ausgebildet und kann an einen Batteriepol einer Autobatterie angeschlossen werden. Des Weiteren weist die Stromsensorvorrichtung 1 ein elektrisches WiderStandselement 40, an dem über eine Spannung bzw. einen Spannungsabfall über zwei Spannungsmesspunkten 42a, 42b der Strom ermittelbar ist. Die Stromsensorvorrichtung 1 ist über ein elektrisches Massenelement 60 mit einem Nullpotential bzw. Ground elektrisch koppelbar. Die Klemmeinrichtung 20, das WiderStandselement 40 und das Massenelement 60 sind einstückig ausgebildet. Vorteilhafterweise sind die Klemmeinrichtung 20, das WiderStandselement 40 und das Massenelement 60 aus einem einstückigen Blechelement 80 ausgebildet . FIG. 1 shows a first exemplary embodiment of the current sensor device 1 according to the invention for measuring a current. In this illustration, the current sensor device 1 is shown from the bottom. The current sensor device 1 has a clamping device 20 for attaching the current sensor device 1 to a holding body. The clamping device 20 is designed as a battery terminal and can be connected to a battery terminal of a car battery. Furthermore, the current sensor device 1 has an electrical resistance element 40, on which the current can be determined via a voltage or a voltage drop across two voltage measuring points 42a, 42b. The current sensor device 1 can be electrically coupled to a zero potential or ground via an electrical mass element 60. The clamping device 20, the WiderStandselement 40 and the mass element 60 are integrally formed. advantageously, the clamping device 20, the resistance element 40 and the mass element 60 are formed from a one-piece sheet metal element 80.
Denkbar ist es auch das Widerstandselement 40 aus einem separaten Teil zu fertigen und jeweils mit der Klemmeinrichtung 20 und dem Massenelement 60 zu verbinden. Denkbar sind dabei stoffschlüssige Verbindungsformen wie z. B. Schweißen. Das Material des WiderStandselements 40 kann derart ausgewählt sein, dass der elektrische Widerstand des WiderStandselement 40 von der Temperatur am WiderStandselement weitestgehend unabhängig ist. It is also conceivable to manufacture the resistance element 40 from a separate part and to connect it in each case to the clamping device 20 and the mass element 60. Conceivable are cohesive connection forms such. B. welding. The material of the resistance element 40 may be selected such that the electrical resistance of the resistance element 40 is largely independent of the temperature at the resistance element.
Das Blechelement 80 wird aus einem Blech ausgestanzt und mittels eines Stanz-Biege Verfahrens zu der in Figur 1 gezeigten Form umgeformt. Alternativ ist es auch denkbar das Blechelement mittels eines Stanz-Tiefzieh-Verfahrens umzuformen die gewünschte Form zu erreichen. In diesem Ausführungsbeispiel wird ein eine Kupferlegierung mit der Zusammensetzung CuFeP als Ausgangsmaterial verwendet. Die vorgenannte Legierung weist ein ausgewogenes Verhältnis zwischen einer geeigneten elektrischen Leitfähigkeit sowie der Festigkeit des Materials auf und ist für den gedachten Einsatzzweck besonders gut geeignet. Denkbar sind jedoch auch andere Legierungen mit den Bestandteilen Kupfer, Eisen und Phosphor und andere stromleitende Metalle. The sheet metal element 80 is punched out of a sheet and formed by means of a punch-bending process to the shape shown in Figure 1. Alternatively, it is also conceivable to reshape the sheet metal element by means of a stamped-deep-drawing process to achieve the desired shape. In this embodiment, a copper alloy having the composition CuFeP as a starting material is used. The aforementioned alloy has a balance between a suitable electrical conductivity and the strength of the material and is particularly well suited for the intended purpose. However, other alloys with the constituents copper, iron and phosphorus and other conductive metals are also conceivable.
Die Klemmeinrichtung 20 hat im ursprünglichen ungebogenen Zustand des Blechelements 80 eine längliche Form und wird kreisförmig zu einer Klemmeinrichtung 20 gebogen, so dass es an einen Batterieanschluss eines Kraftfahrzeugs anschließbar ist. Die Klemmeinrichtung 20 ist senkrecht zur Hauptfläche eines L-förmigen Abschnitts der Stromsensorvorrichtung 1 ausgerichtet. Die Klemmeinrichtung 20 weist im Übergangsbereich zum L-förmigen Abschnitt Biegeaussparungen 21a, 21b auf, um das senkrechte verbiegen der Klemmeinrichtung 20 zum L-förmigen Abschnitt zu erleichtern. Ferner weist die Klemmeinrichtung 20 zwei freie Enden 22a, 22b auf, die jeweils eine Bohrung 23a, 23b aufweisen. Durch die Bohrung 23a, 23b wird eine Befestigungsmittel 24, hier in Form einer Schraube mit einer Mutter, durchgeführt, um die Stromsensorvorrichtung an einem Haltekörper, hier dem Batterieanschluss, zu befestigen. Die freien Enden 22a, 22b sind so gebogen, dass sie leicht schräg zur Hauptfläche des L-förmigen Abschnitts ausgerichtet sind. Direkt an die Klemmeinrichtung 20 schließt sich der im Wesentlichen L-förmige Abschnitt mit dem Widerstandselement 40 und dem Massenelement 60 an, wobei die Klemmeinrichtung 20 am kurzen Teil des L-förmigen Abschnitts anschließt. Das WiderStandselement 40 ist in Form eines Messabschnitts 41 in dem Blechelement integriert ausgebildet ist, die in den Figuren schematisch durch die gestrichelten Linien angedeutet sind. Der Messabschnitt 41 kann als ein Bereich verstanden werden, der im Hinblick auf den elektrischen Widerstand gesondert angepasst geformt ist und die in etwa durch zwei Spannungsmesspunkte 42a, 42b begrenzt wird. Um den elektrischen Widerstand innerhalb des Messabschnitts 41 zu erhöhen, sind Ausnehmungen 43a, 43b vorgesehen . Im Ausführungsbeispiel gemäß Figur 1 sind die muldenförmige Ausnehmungen 43a, 43b an den Kantenbereichen des Blechelements 80 vorgesehen. Alternativ dazu ist es auch denkbar, zusätzlich zu den muldenförmigen Ausnehmungen 43a, 43b auch eine Ausnehmung 43c innerhalb des Materials vorzusehen, wie im zweiten Aus- führungsbeispiel gemäß Figur 2 gezeigt. Die Ausnehmungen 43a, 43b, 43c sind symmetrisch zur Längsachse des Messabschnittes 41 angeordnet und weisen vorteilhafterweise abgerundete Kanten auf . Die Spannungsmesspunkte 42a, 42b liegen außerhalb des guer zur Stromrichtung I liegenden Bereichs, in denen sich die Aus- nehmungen 43a, 43b, 43c befinden. Bei einem Stromfluss durch das Blechelement 80 kann dann über die Spannung, die an den Spannungsmesspunkten 42a, 42b gemessen wird, und den bekannten elektrischen Widerstand R des Messabschnitts 41 der Strom ermittelt werden. The clamping device 20 has an elongated shape in the original unflexed state of the sheet metal element 80 and is bent in a circle to a clamping device 20 so that it can be connected to a battery terminal of a motor vehicle. The clamping device 20 is aligned perpendicular to the main surface of an L-shaped portion of the current sensor device 1. The clamping device 20 has in the transition region to the L-shaped portion Biegeaussparungen 21a, 21b to the vertical bending of the clamping device 20 to the L-shaped Section to facilitate. Furthermore, the clamping device 20 has two free ends 22a, 22b, each having a bore 23a, 23b. Through the bore 23a, 23b, a fastening means 24, here in the form of a screw with a nut performed to attach the current sensor device to a holding body, here the battery terminal. The free ends 22a, 22b are bent to be slightly oblique to the major surface of the L-shaped portion. Directly to the clamping device 20, the substantially L-shaped portion with the resistance element 40 and the mass member 60 connects, wherein the clamping device 20 connects to the short part of the L-shaped portion. The resistance element 40 is designed to be integrated in the form of a measuring section 41 in the sheet metal element, which are indicated schematically in the figures by the dashed lines. The measuring section 41 can be understood as a region which is shaped separately in terms of electrical resistance and which is limited approximately by two voltage measuring points 42a, 42b. In order to increase the electrical resistance within the measuring section 41, recesses 43a, 43b are provided. In the exemplary embodiment according to FIG. 1, the trough-shaped recesses 43a, 43b are provided on the edge regions of the sheet metal element 80. Alternatively, it is also conceivable, in addition to the trough-shaped recesses 43a, 43b, also to provide a recess 43c within the material, as shown in the second exemplary embodiment according to FIG. The recesses 43a, 43b, 43c are arranged symmetrically to the longitudinal axis of the measuring section 41 and advantageously have rounded edges. The voltage measuring points 42a, 42b are outside the region lying to the current direction I, in which the output recesses 43a, 43b, 43c are located. During a current flow through the sheet metal element 80, the current can then be determined via the voltage which is measured at the voltage measuring points 42a, 42b and the known electrical resistance R of the measuring section 41.
Wie im dritten und vierten Ausführungsbeispiel gemäß Figur 3 und 4 gezeigt, wird der Messabschnitt 41 mittels eines Gehäuses 44 wasserdicht abgedeckt, wobei das Gehäuse nicht wasserdicht ausgebildet sein muss. Das Gehäuse 44 umfasst den gesamten Querschnitt des Blechelements 80 im Bereich des Messabschnitts 41. Es weist eine wasserdichte Öffnung 45 auf, durch die ein Kabel 46 durchführbar ist, um die gemessenen Daten zu übertragen. Ferner ist es, wie in Figur 4 gezeigt, denkbar die Stromsensorvorrichtung durch eine Messeinheit 47 zu erweitern. Die Messeinheit ist im Messabschnitt 41 angeordnet, wobei die Messeinheit mit dem WiderStandselement 40 elektrisch gekoppelt ist. Die Messeinheit 47 weist unter anderem einen Tempera- tursensor auf und ist im Bereich des Messabschnitts 41 thermisch mit dem WiderStandselement 40 gekoppelt. As shown in the third and fourth embodiment shown in Figures 3 and 4, the measuring portion 41 is covered by a waterproof housing 44, wherein the housing does not have to be waterproof. The housing 44 comprises the entire cross-section of the sheet-metal element 80 in the region of the measuring section 41. It has a watertight opening 45, through which a cable 46 can be made in order to transmit the measured data. Furthermore, as shown in FIG. 4, it is conceivable to expand the current sensor device by a measuring unit 47. The measuring unit is arranged in the measuring section 41, wherein the measuring unit is electrically coupled to the resistance element 40. The measuring unit 47 has inter alia a temperature sensor and is thermally coupled to the resistance element 40 in the region of the measuring section 41.
Ferner ist die Messeinheit 47 zur Messung eines Spannungsabfalls zwischen zwei Spannungsmesspunkten 42a, 42b elektrisch mit dem WiderStandselement 40 verbunden. An der Messeinheit 47 bzw. dem WiderStandselement 40 sind des Weiteren Anschlusseinrichtungen 48 angebracht, über die die Messdaten übertragen werden können. Die Anschlusseinrichtungen 48 sind im Ausführungsbeispiel aus Figur 4 als Anschlussstifte 48 ausgebildet und an der Messeinheit 47 angebracht. Über die verschließbare Öffnung 45, die optional wasserdicht sein kann, kann dann mittels eines hier nicht gezeigten Steckers die Stromsensorvorrichtung mit einer Auswerteeinheit verbunden werden. Denkbar wäre aber auch Sendeelemente zum kabellosen Übertragen der Messdaten an die Messeinheit 47 anzubringen. Sowohl die Messeinheit 47 als auch die Anschlusseinrichtungen sind zum besseren Schutz vor äußeren Einflüssen innerhalb des Gehäuses 44 angeordnet. Furthermore, the measuring unit 47 for measuring a voltage drop between two voltage measuring points 42a, 42b is electrically connected to the resistance element 40. Furthermore, connection devices 48, via which the measurement data can be transmitted, are attached to the measuring unit 47 or the resistance element 40. The connection devices 48 are formed in the embodiment of Figure 4 as pins 48 and attached to the measuring unit 47. Via the closable opening 45, which may optionally be watertight, the current sensor device can then be connected to an evaluation unit by means of a plug (not shown here). It would also be conceivable to transmit elements for wireless transmission of the measured data to the Measuring unit 47 to install. Both the measuring unit 47 and the connection devices are arranged within the housing 44 for better protection against external influences.
Das Massenelement 60 ist am freien Ende des L-förmigen Abschnitts angeordnet. In den Ausführungsbeispielen weist das freie Ende 61 des L-förmigen Abschnitts eine Bohrung 62 auf, durch die ein Bolzen 63 oder eine Schraube durchführbar ist. The mass member 60 is disposed at the free end of the L-shaped portion. In the embodiments, the free end 61 of the L-shaped portion has a bore 62 through which a bolt 63 or a screw is feasible.
Durch den Anschluss der Klemmeinrichtung 20 an einen Anschluss einer Batterie und des Massenelements 60 an einen Verbraucher wird die Stromsensorvorrichtung 1 in einen elektrischen Strompfad geschaltet, so dass ein Strom durch das Blechelement 80 fließen kann. Alternativ ist es vorgesehen die Klemmeinrichtung mit dem Anschluss einer Batterie und das Massenelement mit einer Masse bzw. Ground elektrisch zu verbinden. Im Bereich des Messabschnitts 41 wird an den Spannungsmesspunkten 42a, 42b eine über den Messabschnitt 41 herrschende Spannung bzw. Spannungsabfall gemessen, über den dann der Strom ermittelbar ist . By connecting the clamping device 20 to a terminal of a battery and the mass element 60 to a consumer, the current sensor device 1 is connected in an electrical current path, so that a current can flow through the sheet metal element 80. Alternatively, it is provided to electrically connect the clamping device with the connection of a battery and the mass element with a ground. In the area of the measuring section 41, a voltage or voltage drop prevailing over the measuring section 41 is measured at the voltage measuring points 42a, 42b, via which the current can then be determined.
Der direkte Anschluss der Stromsensorvorrichtung an dem Anschluss der Batterie hat den Vorteil, dass die Temperatur am WiderStandselement 40 annähernd der Temperatur am Anschluss der Batterie ist. Auf diese Weise ist die Temperatur der Batterie ermittelbar, um den Zustand der Batterie zu bestimmen. Des Weiteren ist mittels des Temperatursensors die Temperatur am WiderStandselement 40 messbar. Auf diese Weise ist der Tem- peratureinfluss auf den elektrischen Widerstand des Widerstandselements 40 präzise ermittelbar, um diesen Einfluss aus der Strommessung rauszurechnen. The direct connection of the current sensor device to the terminal of the battery has the advantage that the temperature at the resistance element 40 is approximately the temperature at the terminal of the battery. In this way, the temperature of the battery can be determined to determine the state of the battery. Furthermore, the temperature at the resistance element 40 can be measured by means of the temperature sensor. In this way, the temperature influence on the electrical resistance of the resistance element 40 can be precisely determined in order to calculate this influence from the current measurement.
Die Erfindung hat insbesondere den Vorteil, dass es aufgrund des einstückigen Aufbaus besonders kostengünstig und mit geringem Herstellungsaufwand produzierbar ist. Die Form der Stromsensorvorrichtung 1 gemäß den Ausführungsbeispielen eignet sich besonders gut für den Einsatz in einem Kraftfahrzeug zur Messung der von einer Batterie abgegebenen Stroms . Die Anwendung der Stromsensorvorrichtung ist jedoch nicht darauf beschränkt. The invention has the particular advantage that it is particularly inexpensive and low due to the one-piece construction Production costs can be produced. The shape of the current sensor device 1 according to the exemplary embodiments is particularly well suited for use in a motor vehicle for measuring the current delivered by a battery. However, the application of the current sensor device is not limited thereto.

Claims

Patentansprüche Patent claims
1. Stromsensorvorrichtung (1) zum Messen eines Stroms, insbesondere zum Messen eines Batteriestroms in Kraftfahrzeugen, aufweisend 1. Current sensor device (1) for measuring a current, in particular for measuring a battery current in motor vehicles
- eine Klemmeinrichtung (20) zum Anbringen der Stromsensorvorrichtung (1) an einen Haltekörper, - a clamping device (20) for attaching the current sensor device (1) to a holding body,
- ein elektrisches Wider Standselement (40) an dem über eine Spannung der Strom (I) messbar ist, und - an electrical resistance element (40) on which the current (I) can be measured via a voltage, and
- ein elektrisches Massenelement (60) über welche die - an electrical mass element (60) via which the
Stromsensorvorrichtung (1) mit einem definierten elektrischen Potential, insbesondere Nullpotential, elektrisch koppelbar ist, Current sensor device (1) can be electrically coupled to a defined electrical potential, in particular zero potential,
dadurch gekennzeichnet, dass die Klemmeinrichtung (20), das WiderStandselement (40) und das Massenelement (60) einstückig ausgebildet sind. characterized in that the clamping device (20), the resistance element (40) and the mass element (60) are formed in one piece.
2. Stromsensorvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Klemmeinrichtung (20), das Widerstands- element (40) und das Massenelement (60) aus einem einstückigen2. Current sensor device according to claim 1, characterized in that the clamping device (20), the resistance element (40) and the mass element (60) are made of a single piece
Blechelement (80) ausgebildet sind. Sheet metal element (80) are formed.
3. Stromsensorvorrichtung (1) nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Widerstands- element (40) in Form eines Messabschnitts (41) in dem3. Current sensor device (1) according to one of the preceding claims, characterized in that the resistance element (40) is in the form of a measuring section (41) in which
Blechelement (80) integriert ausgebildet ist. Sheet metal element (80) is designed to be integrated.
4 . Stromsensorvorrichtung (1) nach dem vorstehenden Anspruch, dadurch gekennzeichnet, dass der Messabschnitt (41) Ausnehmungen (43a, 43b, 43c) aufweist. 4. Current sensor device (1) according to the preceding claim, characterized in that the measuring section (41) has recesses (43a, 43b, 43c).
5 . Stromsensorvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass der Messabschnitt (41) muldenförmige Ausnehmungen (43a, 43b) an den Kantenbereichen aufweist. 5. Current sensor device according to claim 4, characterized in that the measuring section (41) has trough-shaped recesses (43a, 43b) on the edge regions.
6. Stromsensorvorrichtung nach einem der vorstehenden Ansprüche gekennzeichnet durch eine Messeinheit, wobei die Messeinheit einen Temperatursensor aufweist. 6. Current sensor device according to one of the preceding claims, characterized by a measuring unit, wherein the measuring unit has a temperature sensor.
7. Stromsensorvorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Klemmeinrichtung als eine Batterieklemme ausgebildet ist. 7. Current sensor device according to one of the preceding claims, characterized in that the clamping device is designed as a battery terminal.
8. Stromsensorvorrichtung (1) nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Blechelement (80) eine Legierung mit den Bestandteilen Kupfer, Eisen und Phosphor, insbesondere mit einer Zusammensetzung CuFeP, enthält . 8. Current sensor device (1) according to one of the preceding claims, characterized in that the sheet metal element (80) contains an alloy with the components copper, iron and phosphorus, in particular with a composition CuFeP.
9. Stromsensorvorrichtung (1) nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Messeinheit (47) im Messabschnitt (41) angeordnet ist, wobei die Messeinheit (47) mit dem Widerstandselement (40) elektrisch gekoppelt ist . 9. Current sensor device (1) according to one of the preceding claims, characterized in that the measuring unit (47) is arranged in the measuring section (41), the measuring unit (47) being electrically coupled to the resistance element (40).
10. Stromsensorvorrichtung (1) nach dem vorstehenden Anspruch, dadurch gekennzeichnet, dass eine Anschlusseinrichtung (48) vorgesehen ist, die Anschlussstifte oder kabellose Sendeelemente zum Übertragen von Messdaten aufweist. 10. Current sensor device (1) according to the preceding claim, characterized in that a connection device (48) is provided which has connection pins or wireless transmission elements for transmitting measurement data.
11. Stromsensorvorrichtung (1) nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Stromsensorvorrichtung (1) mittels eines Stanz-Biege oder eines Stanz-Tiefzieh-Verfahrens hergestellt ist. 11. Current sensor device (1) according to one of the preceding claims, characterized in that the current sensor device (1) is manufactured by means of a stamping-bending or a stamping-deep-drawing process.
2. Stromsensorvorrichtung (1) nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Blechelement (80) einen im Wesentlichen L-förmigen Abschnitt aufweist . 2. Current sensor device (1) according to one of the preceding claims, characterized in that the sheet metal element (80) has a substantially L-shaped section.
13. Stromsensorvorrichtung (1) nach dem vorstehenden Anspruch, dadurch gekennzeichnet, dass die Klemmeinrichtung (20) am kurzen Teil des L-förmigen Abschnitts angeordnet ist. 13. Current sensor device (1) according to the preceding claim, characterized in that the clamping device (20) is arranged on the short part of the L-shaped section.
14. Kraftfahrzeug mit einer Stromsensorvorrichtung (1) nach einem der Ansprüche 1 bis 13. 14. Motor vehicle with a current sensor device (1) according to one of claims 1 to 13.
EP14702790.8A 2013-03-05 2014-01-30 Current sensor device with integrated clamping device and mass element Withdrawn EP2965103A1 (en)

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DE102013203760 2013-03-05
DE102013210130.9A DE102013210130A1 (en) 2013-03-05 2013-05-29 Current sensor device with integrated clamping device and mass element
PCT/EP2014/051755 WO2014135312A1 (en) 2013-03-05 2014-01-30 Current sensor device with integrated clamping device and mass element

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EP (1) EP2965103A1 (en)
KR (2) KR102107268B1 (en)
CN (2) CN105008947B (en)
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WO (2) WO2014135312A1 (en)

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US10677847B2 (en) 2020-06-09
US20150369877A1 (en) 2015-12-24
DE102013210130A1 (en) 2014-09-25
KR20150125999A (en) 2015-11-10
CN105026943A (en) 2015-11-04
WO2014135312A1 (en) 2014-09-12
DE102013210128A1 (en) 2014-09-11
CN105008947B (en) 2019-03-01
WO2014135451A1 (en) 2014-09-12
KR102107268B1 (en) 2020-05-06
CN105008947A (en) 2015-10-28
US20150377980A1 (en) 2015-12-31
KR20150126014A (en) 2015-11-10

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