EP4182706A1 - Capteur pour détecter un courant électrique circulant à travers un conducteur - Google Patents

Capteur pour détecter un courant électrique circulant à travers un conducteur

Info

Publication number
EP4182706A1
EP4182706A1 EP21743066.9A EP21743066A EP4182706A1 EP 4182706 A1 EP4182706 A1 EP 4182706A1 EP 21743066 A EP21743066 A EP 21743066A EP 4182706 A1 EP4182706 A1 EP 4182706A1
Authority
EP
European Patent Office
Prior art keywords
magnetic field
sensor
signal
conductor
field sensor
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.)
Pending
Application number
EP21743066.9A
Other languages
German (de)
English (en)
Inventor
Lukas Lamprecht
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP4182706A1 publication Critical patent/EP4182706A1/fr
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/146—Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop
    • G01R15/148—Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop involving the measuring of a magnetic field or electric field

Definitions

  • the present invention will be described in the context of, but not limited to, a sensor for detecting an electric current flowing through a conductor in the automotive field.
  • electric energy storage devices are used in order to store the electric energy for the electric motor, which supports the drive or serves as a drive.
  • So-called lithium-ion batteries are used in the latest generation of vehicles.
  • the present invention is independent of the design of the electrochemical energy store.
  • Current sensors for electrified drive trains are used for energy balancing or for monitoring performance.
  • This invention is particularly suitable, but not exclusively, for high-voltage battery current sensors that primarily monitor the state of charge (state of charge, SOC) of the traction battery in electrified vehicles.
  • SOC state of charge
  • Overcurrent detection is also relevant to safety and the main task of the current sensor.
  • Applications of the invention in other areas, such as measuring the inverter current or currents in the DC/DC converters are also conceivable.
  • the invention outside of the electrified Drive train for example, in other sectors such as industrial sensors, aerospace or medical technology.
  • such a sensor is usually constructed using exactly one measuring principle that is (cost-)optimal for the respective application.
  • DE 102011 088 893 A1 describes a current measuring circuit for the redundant measurement of electrical current with a measuring resistor, a magnetic field sensor and an evaluation circuit on an evaluation circuit board, the evaluation circuit for determining the electric current with the help of the measuring resistor is used.
  • the second magnetic field sensor is arranged on the evaluation circuit board and the evaluation circuit board in the immediate vicinity of the measuring resistor, so that the second magnetic field sensor can detect the magnetic field of the current-carrying measuring resistor.
  • the second - indirect - method thus serves to check the plausibility of the first - direct - method.
  • a sensor for detecting an electric current flowing through a conductor is therefore proposed, which at least largely avoids the disadvantages of known sensors and which, in particular, allows a sensor-internal plausibility check of a magnetic-field-based sensor for current measurement by means of a second, but different, magnetic-field-based sensor signal.
  • This plausibility check takes place within the sensor, for example by comparing the absolute or relative deviation of both signals within certain tolerance limits.
  • a relevant deviation leads to the detection of a sensor error and the output of a signal that leads to the assumption of a safe state in the higher-level system (e.g. control unit).
  • a sensor for detecting an electric current flowing through a conductor comprises a first magnetic field sensor, which is designed to detect a magnetic field generated by the conductor, wherein the first magnetic field sensor is designed to output a first signal based on the detected magnetic field, which Conductor indicating current flowing, a second magnetic field sensor, which is designed to detect the magnetic field generated by the conductor, wherein the second magnetic field sensor is designed to output a second signal based on the detected magnetic field, and an evaluation circuit on a
  • Evaluation circuit board the first magnetic field sensor and the second magnetic field sensor being connected to the evaluation circuit, the first signal and the second signal being detectable by the evaluation circuit, the evaluation circuit being designed to validate the first signal using the second signal.
  • the electric current flowing through the conductor is correspondingly indirectly detected both by the first magnetic field sensor and by the second magnetic field sensor.
  • the first magnetic field sensor thus measures or detects a magnetic field of the conductor, which is superimposed on the magnetic field of the first magnetic field sensor. Thanks to the superimposed alternating field, the primary magnetic field of the conductor, which can also be referred to as the primary conductor, and thus the primary current through the conductor can be inferred.
  • a voltage drop generated by the superimposed magnetic field which drops across a measuring resistor, for example, can be converted into a current which, taking into account the number of windings, is proportional to the primary conductor current to be measured.
  • the magnetic field of the conductor generated by the primary current to be measured can be recorded simultaneously by a second, independent magnetic field sensor.
  • This secondary sensor can work according to the Hall or xMR principle, for example. Lower accuracies or higher susceptibility to interference can serve the purpose of cost optimization are tolerated. This makes it possible to detect the magnetic field of the conductor, which is proportional to the current to be measured, on two physically independent paths.
  • the first magnetic field sensor for example in the form of a Förster probe, can have a magnetic core and a coil surrounding the magnetic core, the coil being designed to generate an alternating magnetic field, the first signal being a superimposition of induced voltage and applied voltage.
  • the coil generates an alternating magnetic field that is superimposed on the magnetic field of the primary conductor to be measured. Thanks to the superimposed alternating field, the primary field and thus the primary current can be inferred from the non-linear magnetization curves of the core and the changing inductance in saturation. If, for example, a Förster probe is used as the primary measuring principle, then this generates fields superimposed on the field of the primary conductor to be measured.
  • the field generated by the primary sensor can then be monitored as an overlay by the secondary sensor. In addition to the actual signal plausibility check, the function monitoring of the field-generating primary Förster probe is thus already fundamentally possible.
  • the first magnetic field sensor can also have a measuring resistor, in particular a shunt resistor, wherein the first signal can be converted into a first electric current by means of the measuring resistor, the first electric current being proportional to the electric current flowing through the conductor.
  • the voltage drop across the measuring resistor of the first magnetic field sensor or Förster probe can thus be converted into a current which, taking into account the number of turns of the coil of the first magnetic field sensor, is proportional to the primary conductor current to be measured.
  • This measuring resistor is preferably a shunt resistor.
  • the shunt resistance in the first magnetic field sensor should not be confused with the direct current measurement principle using shunt resistances.
  • the latter are in the mOhm range, while the shunt in the first magnetic field sensor can be 1 Ohm, for example, since it only has to handle much smaller currents.
  • the first magnetic field sensor can be designed to at least partially surround the conductor.
  • the second magnetic field sensor can be arranged on the evaluation circuit board. A compact design of the sensor can thus be implemented. Both magnetic field sensors can, for example, be integrated in a common housing to save space.
  • the evaluation circuit can be designed to detect the first signal and the second signal continuously and in parallel. Alternatively, the evaluation circuit can be designed to detect the first signal and the second signal intermittently and sequentially.
  • the sensor thus allows different operating modes. In this way, the first and second magnetic field sensors can work at the same time and be constantly available without having to be synchronized with one another. This has the advantage that there is no need to manage the sensor measurement intervals. In addition, there is no need to store the signals for subsequent use, but they can be "calculated" directly, e.g. through differential arrangement. Alternatively, the first and second magnetic field sensors are activated or read out one after the other. The change intervals are selected in such a way that the active coil of the first magnetic field sensor achieves an optimum in terms of measurement accuracy, sampling rate and immunity to interference. This has the advantage that the excitation field of the first magnetic field sensor does not disturb the second magnetic field sensor.
  • the second magnetic field sensor can be of planar design. This means that it can be arranged flat on the evaluation circuit board.
  • the second magnetic field sensor can be arranged perpendicular to the evaluation circuit board. This allows a further orientation for the measurement of the magnetic field of the conductor.
  • the second magnetic field sensor can be a Hall sensor or a magnetometer. Accordingly, the second magnetic field sensor can be an inexpensive sensor for indirectly measuring the current flowing through the conductor.
  • the first magnetic field sensor can be a Förster probe.
  • a Förster probe has the advantage that it detects the current flowing through the conductor without contact and can capture indirectly. It is still very sensitive over wide measuring ranges.
  • the evaluation circuit can be designed to check the first signal for plausibility using the second signal by detecting an absolute or relative deviation from one another. In this way, the functionality of the first magnetic field sensor can be checked precisely. Taking into account specified tolerance limits, a faulty sensor signal can therefore be determined, which is reported to the higher-level system via the communication interface of the sensor. In this way, attention can be drawn to the present error at the system level and a safe state can be assumed.
  • the motor vehicle or the electrical device has a battery and a sensor according to the invention as described above.
  • a magnetic field sensor is generally understood to be a sensor for detecting magnetic fields.
  • the magnetic field sensor can be designed in particular for measuring magnetic flux densities. Magnetic flux densities are measured in units of tesla (T), and typical measurement ranges of magnetometers range from approximately IO 15 T to 10 T.
  • a plausibility check is to be understood as a method in the context of which a value or, in general, a result is checked to determine whether it can be plausible at all, that is to say acceptable, plausible and comprehensible or not. Accordingly, smaller deviations, about ⁇ 1%, between the two measurement results are tolerable.
  • a Förster probe or Förster probe which is also known as a fluxgate magnetometer or also a saturation core magnetometer, is to be understood within the scope of the present invention as a magnetometer for vectorial determination of the magnetic field.
  • the magnetometer works with a ring core (toroid), which is excited by means of an attached coil.
  • the receiver coil surrounds the entire core, which is driven into saturation. In the absence of an external field, the induced voltage will result in symmetrical currents in the coil winding.
  • two soft-magnetic coil cores are periodically driven into saturation. The cores are wound by two opposing receiver coils, so that in the absence of a field, the induced voltages in both coils cancel.
  • An external magnetic field component acts in parallel or antiparallel on the fields of the two coils.
  • the saturation of the core is sooner reached in the one-half cycle in this coil.
  • the external field is antiparallel during this half period, so the saturation of the core sets in there later.
  • the induced voltage has twice the frequency of the excitation AC voltage.
  • the current is then proportional to the external field and cancels it out.
  • the direct current is generated with negative feedback and is therefore also the output signal of the sensor. This is how current sensors are built, for example. If fluxgate magnetometers are constructed with a compensation coil, this makes them measurable at higher frequencies up to the kHz range, for example. However, this can be dispensed with within the scope of the present invention for reasons of cost. Direct current measurements (both positive and negative) are particularly relevant anyway, since battery currents are to be measured here.
  • a Hall sensor is to be understood as meaning a sensor that uses the Hall effect to measure magnetic fields.
  • Hall sensors consist of the thinnest possible crystalline, doped semiconductor Layers that usually have four electrodes on the sides. A current is fed in through the two opposite electrodes, the two orthogonal electrodes are used to pick up the Hall voltage. If such a Hall sensor is traversed by a magnetic field perpendicular to the layer, it supplies an output voltage that is proportional to the (signed) magnitude of the vector product of magnetic flux density and current. The cause is the Lorentz force on the moving majority charge carriers in the layer.
  • the Hall voltage is also temperature dependent and can have an offset. Due to the proportionality of the Hall voltage to the charge carrier mobility and the concentration of the majority charge carriers, the Hall effect is an established method of determining these parameters in semiconductor technology.
  • a Hall sensor also supplies a signal when the magnetic field in which it is located is constant. This is the advantage compared to a simple coil as a magnetic field sensor (e.g.
  • Hall sensors Another important advantage of Hall sensors is that no ferromagnetic or ferrimagnetic materials (such as nickel or iron) are required for their implementation. This means that the magnetic field to be measured is not changed just by bringing the sensor inside. Magnetoresistive sensors or fluxgate magnetometers do not have this property.
  • the umbrella term is xMR sensor; Thin-film sensors that change their resistance directly under the influence of the magnetic flux and are therefore called "X-Magneto Resistive".
  • the xMR stands for all sensors that work according to all known magnetoresistive methods, such as GMR sensors (giant, dt. "huge, huge", GMR effect), AMR sensors (anisotropic, dt. “anisotropic” AMR effect) or CMR sensors (Colossal, dt.
  • XMR and Hall sensors are not as sensitive as the above, they are used in large numbers for simpler tasks due to their simple structure (semiconductor technology) and the associated low-cost production. These include current sensors.
  • the senor according to the invention offers a large number of advantages. These are explained below by way of example and not conclusively.
  • the sensor according to the invention is based on a purely non-contact measuring method, so that due to the principle it can already be realized with galvanic isolation from the high-voltage primary conductor. This means that no special efforts are required for high-voltage insulation. Expensive precision resistors (shunts) are not necessary, and there is no power loss from these resistors, which can amount to several tens of watts. Complete encapsulation of the first and second magnetic field sensors is possible, e.g. by means of overmoulding within one component. It is possible to integrate the measurement methods together on one circuit board.
  • the sensor can be implemented as an assembly option if certain applications do not require a plausibility check, which means that costs can be saved when the number of units is increased.
  • the sensor allows the cost-effective use of sensors with lower accuracy to obtain the plausibility signal, since only similar (not identical) results have to be achieved. Drifts between the sensors can be detected. There can be no need for separate sensors for plausibility checking and thus no wiring of the otherwise separate sensors to each other is necessary, elimination of efforts on the part of the system, since the sensor can diagnose itself, increase in security through faster reaction times (short signal paths/running times), increase in the Safety through subsystems or measuring principles that are compatible with each other at the factory, since the compatibility of the two independently used magnetic field sensors does not first have to be ensured at great expense.
  • the primary measuring principle is preferably a fluxgate magnetometer, which is characterized by its high measuring accuracy.
  • the fluxgate magnetometer is constructed without a compensation coil, so that a cost-effective construction is possible.
  • the restriction that higher-frequency components (e.g. from 100 Hz) cannot be fully measured is acceptable, since these are primarily direct current measurements.
  • FIG. 1 shows a perspective view of a sensor according to the invention
  • FIG. 2 shows a front view of the sensor.
  • FIG. 1 shows a perspective view of a sensor 10 according to the invention.
  • the sensor 10 is designed to detect an electric current 14 flowing through a conductor 12 .
  • the conductor 12 is, for example, a copper cable or a busbar that is used for the transmission of the current 14 to be measured.
  • the sensor 10 has a first magnetic field sensor 16 .
  • the first magnetic field sensor 16 is designed to detect a magnetic field generated by the conductor 12 .
  • the first magnetic field sensor 16 is also designed to output a first signal based on the detected magnetic field, which indicates the current 14 flowing through the conductor 12 .
  • the first magnetic field sensor 16 has a magnetic core 18 .
  • the magnetic core 18 is made of, for example, a soft magnetic material.
  • the first magnetic field sensor 16 also has a coil 20 .
  • the Coil 20 surrounds magnetic core 18.
  • coil 20 is wound around magnetic core 18.
  • the coil 20 is designed to generate an alternating magnetic field.
  • the first signal is a superimposition of the induced voltage and the applied voltage.
  • the first magnetic field sensor 16 also has a measuring resistor, not shown in detail, such as a shunt resistor.
  • the first signal can be converted into a first electric current by means of the measuring resistor.
  • the first electric current is proportional to the electric current 14 flowing through the conductor 12, in particular taking into account the number of windings of the coil 20.
  • the first magnetic field sensor 16 is designed to enclose the conductor 12 at least partially.
  • the magnetic core 18 surrounds the conductor 12 concentrically or coaxially.
  • the magnetic core 18 is designed in the shape of a toroidal shape.
  • the magnetic core 18 does not touch the conductor 12 in this case.
  • the first magnetic field sensor 16 is designed as a Förster probe in the exemplary embodiment.
  • FIG. 2 shows a front view of sensor 10.
  • the second magnetic field sensor 22 is designed to detect the magnetic field generated by the conductor 12 .
  • the second magnetic field sensor 22 is designed to output a second signal based on the detected magnetic field.
  • the sensor 10 also has an evaluation circuit 24 .
  • the evaluation circuit 24 is arranged on an evaluation circuit board 26 .
  • the evaluation circuit 24 is an ASIC, for example.
  • the second magnetic field sensor 22 is of planar design.
  • the second magnetic field sensor 22 is arranged on the evaluation circuit board 26 .
  • the second magnetic field sensor 22 can be arranged perpendicular to the evaluation circuit board 26 .
  • the position of the second magnetic field sensor 22 can be selected in such a way that it is influenced as little as possible by the coil 20 of the first magnetic field sensor 16 . In particular, an optimum between the distance from the conductor 12 and the distance from the coil 20 of the first magnetic field sensor 16 is to be determined.
  • the main measuring direction of the second magnetic field sensor 22 is chosen so that it is tangential to the conductor 12 enclosing field lines and thus achieves maximum sensitivity.
  • the second magnetic field sensor 22 is a Hall sensor.
  • the second magnetic field sensor 22 can be a magnetometer or any magnetic field-based sensor element.
  • the first magnetic field sensor 16 and the second magnetic field sensor 22 are each connected to the evaluation circuit 24 .
  • the first magnetic field sensor 16 can be present as a discrete structure or as a chip-integrated structure in connection with the evaluation circuit 24.
  • the evaluation circuit 24 is also electrically contacted by means of connecting lines 28.
  • the connection lines 28 are used for communication with, for example, a bus system and the power supply.
  • the first signal and the second signal can be detected by the evaluation circuit 24 .
  • the evaluation circuit 24 is designed to check the first signal for plausibility using the second signal.
  • the evaluation circuit is designed in particular to check the first signal for plausibility using the second signal by detecting an absolute or relative deviation from one another.
  • the evaluation circuit 24 is designed to detect the first signal and the second signal continuously and in parallel. Alternatively, the evaluation circuit 24 is designed to detect the first signal and the second signal intermittently and sequentially.
  • the operation of the sensor 10 is described in more detail below. If a current 14 flows through the conductor 12, a magnetic field is created around the conductor 12.
  • the first magnetic field sensor 16 is controlled so that the coil 20 generates an alternating magnetic field that is superimposed on the magnetic field of the conductor 12 to be measured. Thanks to the superimposed alternating field, the magnetic field of the conductor 12 and thus the current 14 through the conductor 12 can be inferred by means of the non-linear magnetization curves of the magnetic core 18 and the changing inductance in the saturation.
  • the voltage drop across the measuring resistor of the first magnetic field sensor 16 can be converted as a first signal into a current which, taking into account the number of windings of the coil 20, is proportional to the current 14 to be measured through the conductor 12.
  • the magnetic field generated by the current 14 to be measured can be simultaneously detected by the second, independent magnetic field sensor 22 and output as a second signal.
  • This second magnetic field sensor 22 can work according to the Hall or xMR principle, for example. Less accuracy or higher susceptibility to interference can be tolerated for the purpose of cost optimization.
  • This makes it possible to detect the magnetic field of the conductor 12, which is proportional to the current 14 to be measured, on two physically independent paths.
  • the two independently obtained measured variables, ie current strengths, are then checked for plausibility by the evaluation circuit 24, which is achieved, for example, by determining the absolute or relative deviations of the first signal and the second signal from one another.
  • a faulty sensor signal can be determined, which is reported to the higher-level system via the communication interface of the sensor 10 .
  • attention can be drawn to the present error at the system level and a safe state can be assumed.
  • this plausibility check takes place within the sensor 10.
  • a relevant deviation ie a deviation that exceeds a threshold value, leads to the detection of a sensor error and to the output of a signal which leads to the assumption of a safe state in the higher-level system, for example the control unit.
  • the sensor 10 can be used in particular in the field of motor vehicles.
  • the sensor 10 is suitable in particular but not exclusively as a high-voltage battery current sensor that primarily monitors the state of charge (state of charge) of the traction battery in electrified vehicles. It is explicitly emphasized that the sensor 10 can also be used outside of the electrified drive train, such as in industrial sensors, aerospace or medical technology.
  • the present invention is verifiable because the use of a second magnetic field sensor can be verified by analyzing the board or printed circuit board and the components installed there.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

L'invention concerne un capteur (10) pour détecter un courant électrique (14) circulant à travers un conducteur (12). Le capteur (10) comprend un premier capteur de champ magnétique (16) qui est conçu pour détecter un champ magnétique généré par le conducteur (12), ledit premier capteur de champ magnétique (16) étant conçu pour émettre un premier signal, qui indique que le courant circule à travers le conducteur (12), sur la base du champ magnétique détecté ; un second capteur de champ magnétique (22), qui est conçu pour détecter le champ magnétique généré par le conducteur (12), ledit second capteur de champ magnétique (22) étant conçu pour émettre un second signal sur la base du champ magnétique détecté ; et un circuit d'analyse (24) sur une carte de circuit imprimé d'analyse (26), le premier capteur de champ magnétique (16) et le second capteur de champ magnétique (22) étant connectés au circuit d'analyse (24), le premier signal et le second signal pouvant être détectés par le circuit d'analyse (24), et le circuit d'analyse (24) étant conçu pour vérifier le premier signal à l'aide du second signal.
EP21743066.9A 2020-07-15 2021-06-30 Capteur pour détecter un courant électrique circulant à travers un conducteur Pending EP4182706A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020208804.7A DE102020208804A1 (de) 2020-07-15 2020-07-15 Sensor zur Erfassung eines durch einen Leiter fließenden elektrischen Stroms
PCT/EP2021/067949 WO2022012930A1 (fr) 2020-07-15 2021-06-30 Capteur pour détecter un courant électrique circulant à travers un conducteur

Publications (1)

Publication Number Publication Date
EP4182706A1 true EP4182706A1 (fr) 2023-05-24

Family

ID=76971825

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21743066.9A Pending EP4182706A1 (fr) 2020-07-15 2021-06-30 Capteur pour détecter un courant électrique circulant à travers un conducteur

Country Status (4)

Country Link
EP (1) EP4182706A1 (fr)
CN (1) CN116235059A (fr)
DE (1) DE102020208804A1 (fr)
WO (1) WO2022012930A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022210607A1 (de) * 2022-10-07 2024-04-18 Robert Bosch Gesellschaft mit beschränkter Haftung Sensor zur Erfassung eines durch einen Leiter fließenden elektrischen Stroms

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2511714A3 (fr) * 2011-04-15 2015-05-27 Magna E-Car Systems GmbH & Co OG Bloc de capteur, commande de capteur et circuit de mesure de courant
DE102011088893A1 (de) 2011-12-16 2013-06-20 Robert Bosch Gmbh Strommessschaltung, Batterie und Kraftfahrzeug
US9291648B2 (en) * 2013-08-07 2016-03-22 Texas Instruments Incorporated Hybrid closed-loop/open-loop magnetic current sensor
DE102014219238A1 (de) * 2014-09-24 2016-03-24 Continental Automotive Gmbh Überstromerkennung im Stromsensor mit Hallsensor

Also Published As

Publication number Publication date
CN116235059A (zh) 2023-06-06
WO2022012930A1 (fr) 2022-01-20
DE102020208804A1 (de) 2022-01-20

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