WO2023247269A1 - Procédé permettant de faire fonctionner un circuit comprenant au moins un composant de puissance - Google Patents

Procédé permettant de faire fonctionner un circuit comprenant au moins un composant de puissance Download PDF

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Publication number
WO2023247269A1
WO2023247269A1 PCT/EP2023/065804 EP2023065804W WO2023247269A1 WO 2023247269 A1 WO2023247269 A1 WO 2023247269A1 EP 2023065804 W EP2023065804 W EP 2023065804W WO 2023247269 A1 WO2023247269 A1 WO 2023247269A1
Authority
WO
WIPO (PCT)
Prior art keywords
power component
power
temperature
circuit
determined
Prior art date
Application number
PCT/EP2023/065804
Other languages
German (de)
English (en)
Inventor
Thomas Haug
Original Assignee
Vitesco Technologies 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 Vitesco Technologies GmbH filed Critical Vitesco Technologies GmbH
Publication of WO2023247269A1 publication Critical patent/WO2023247269A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/01—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using semiconducting elements having PN junctions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/42—Circuits effecting compensation of thermal inertia; Circuits for predicting the stationary value of a temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/42—Circuits effecting compensation of thermal inertia; Circuits for predicting the stationary value of a temperature
    • G01K7/427—Temperature calculation based on spatial modeling, e.g. spatial inter- or extrapolation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H6/00—Emergency protective circuit arrangements responsive to undesired changes from normal non-electric working conditions using simulators of the apparatus being protected, e.g. using thermal images
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K2217/00—Temperature measurement using electric or magnetic components already present in the system to be measured
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K2017/0806—Modifications for protecting switching circuit against overcurrent or overvoltage against excessive temperature

Definitions

  • Knowing the current load on individual components as accurately as possible is therefore advantageous for optimized operation of a circuit.
  • Knowledge about the aging status of individual components is also advantageous, especially for the operational reliability of the circuit.
  • a method for operating a circuit that has at least one power component comprises measuring a voltage drop across the at least one power component and determining a current internal resistance of the power component from the measured voltage drop. Furthermore, the method includes determining an instantaneous power loss of the power component from the determined instantaneous internal resistance and determining a current temperature of the power component from the determined instantaneous power loss.
  • the “current internal resistance” is in particular the internal resistance at the time the voltage drop is measured.
  • the voltage drop is in particular the difference between the electrical potential on the input side and the output side.
  • a switching power component such as a contactor with a main power line for the power to be switched and a control line
  • the voltage drop is measured in a switching power component, in particular when the main power contact is closed.
  • the process therefore does not measure temperature directly.
  • the heat currently generated on the power component itself and thus also on the Temperature of the power component itself can be inferred. Since the voltage drop can be measured highly dynamically and therefore the instantaneous power loss can also be determined highly dynamically, it is possible to determine the temperature of the power component with a very high temporal resolution.
  • the method therefore has the advantage that it enables the temperature of the at least one power component to be monitored practically in real time. It is therefore possible to regulate the circuit in order to achieve optimal utilization of all components.
  • this improves the absolute accuracy of the temperature determination on the power component, since the conclusion from the measured voltage drop about the current temperature of the power component is made more directly and possibly incomplete modeling can be partially dispensed with.
  • the dynamic accuracy of the temperature determination is also improved, since measurements can be carried out directly at the location of the power component and the voltage drop can be measured with high temporal resolution.
  • it is determined whether the current temperature of the power component exceeds a threshold value TS.
  • the threshold value TS is chosen in particular so that operation of the power component is still safe at a temperature TS.
  • a suitable measure can be taken, in particular the increased temperature of the power component can be taken into account when operating the circuit and the operation of the circuit can be adjusted in such a way that the power component is relieved.
  • the load on the power component is reduced when the current temperature exceeds the threshold value TS.
  • the method determines whether the instantaneous internal resistance of the power component exceeds a threshold value RS. Since the internal resistance of the power component is an indicator of its state of health, monitoring the current internal resistance can be used to determine whether there are problems with the power component, i.e. whether it is damaged, defective or severely aged, for example. If it is determined that the instantaneous internal resistance of the power component exceeds the threshold RS, appropriate measures can be taken. These can, for example, consist of suitable operation of the circuit or the output of an alarm or an error message.
  • the power component can be designed, for example, as a contactor, shunt, electronic fuse or pyrotechnic fuse. This can be a power semiconductor component or, for example, an electromechanical component.
  • the determined instantaneous temperature is compared with a temperature of the power component, which is determined by means of a temperature measurement was determined at a point of the circuit spaced from the power component using a heat transfer model.
  • a direct temperature measurement is carried out on the circuit, but not directly on the power component itself, for example because it is inaccessible, but at a point in the circuit that is affected by the power component.
  • the temperature of the power component itself is then determined from the measured temperature using a heat transfer model. This temperature can be compared with the current temperature determined from the current internal resistance of the power component in order to check the plausibility of both measurements.
  • the determined instantaneous internal resistance and/or the determined instantaneous temperature of the power component are used to monitor an aging state of the power component.
  • determined values for the current internal resistance and/or the current temperature of the power component are stored in order to be able to evaluate their development over time.
  • This approach has the advantage that the aging condition of the power component can be monitored in great detail, in real time and on a component-specific basis.
  • an arrangement comprising a circuit with at least one power component and a control device is specified, wherein the control device comprises a memory in which program code is stored, which causes the control device to carry out the described methods when the program code is executed.
  • the arrangement with the circuit can be used advantageously, particularly in vehicle technology in the electric drive train of electric or hybrid vehicles, for example in a so-called battery junction box.
  • a battery junction box is understood to mean, in particular, an electronic circuit arrangement - in some embodiments, a separately housed electronic circuit arrangement - which is designed to provide the electrical connection - in particular the high-voltage connection - between a traction battery of a hybrid vehicle or battery-electric vehicle and the one connected to the traction battery consumers - for example an electric drive - to establish and interrupt.
  • a computer program product comprising instructions which, when the program is executed by a computer, cause it to carry out the method described.
  • the method and the circuit enable maximum operational reliability and operational availability of the circuit while at the same time optimizing system costs. This is achieved in particular by the fact that the temperature monitoring takes place in real time and on a component-specific basis and requires less extensive modeling than is known from the prior art. In particular, the component-specific determination of the temperature makes it possible to optimally load and utilize the power component.
  • Figure 1 shows an electrically driven vehicle with an arrangement according to an embodiment of the invention
  • Figure 2 shows a flowchart of a method for operating the arrangement according to Figure 1.
  • Figure 1 shows a highly schematic representation of an electrically powered vehicle 1, for example a hybrid vehicle or a purely electrically powered vehicle.
  • the vehicle 1 has an arrangement 2 with at least one circuit 3 and a control device 4 for controlling or regulating the circuit 3, which is symbolized by the fact that the circuit 3 is connected to the control device 4 through a signal line 6.
  • the arrangement 2 can be an electric drive train of the vehicle 1 or just a part of it.
  • it is a battery junction box.
  • the circuit 3 has at least one power component 5, for example a power semiconductor component, which heats up during operation due to heat loss.
  • the power component 5 is a contactor which can be controlled as a control line by means of the signal line 6 in order to establish and interrupt the high-voltage connection between a traction battery 10 and an electric drive 11 of the electrically driven vehicle 1 via its main power line.
  • the circuit 3 also has a measuring arrangement 7, for example a measuring circuit, in order to measure the voltage drop U across the power component 5 during operation.
  • the measuring circuit can have a shunt, for example.
  • the potential difference between the input-side and the output-side electrical potential of the power semiconductor component 5 can be measured as a voltage drop U by means of the measuring circuit.
  • the voltage difference between the battery-side and the consumer-side voltage at the contactor can be measured.
  • the voltage drop U across the power component 5 is measured at small time intervals depending on the operating mode of the circuit 3 and evaluated by the control device 4 or an external unit. The evaluation is described in more detail below using Figure 2.
  • FIG. 1 also shows a temperature sensor 8, which is also within the
  • Arrangement 2 is arranged and which is connected to the control device 4 via a Signal line 9 is connected.
  • the temperature sensor 8 measures the temperature of the circuit 3 at a point that is spaced from the power component 5, so that the temperature sensor 8 does not directly deliver the temperature of the power component 5.
  • Figure 2 shows a method according to an embodiment of the invention using a flow chart.
  • the method which can be carried out in particular in a computer-implemented manner by the control device 4 according to FIG. Since the current I at the power component 5 is typically known, the internal resistance R of the power component 5 can be determined from this in a step 200. Alternatively, the current I through the main power line of the power component 5 can also be measured.
  • a step 201 it is checked whether the current internal resistance R of the power component 5 is above a threshold value RS. If this is the case, a suitable measure is taken, in particular the control device 4 can adapt the regulation of the circuit 3 in such a way that the power component 5 is loaded less.
  • a step 400 it is checked whether the determined temperature T of the power component 5 is above a threshold value TS. If this is the case, an appropriate measure will be taken, for example: Control device 4 adapts the regulation of circuit 3 in such a way that the power component 5 is relieved.
  • the temperature T determined in the manner described can be compared with the measurement result of the temperature sensor 8 or with a model calculation that uses the measurement result of the temperature sensor. Since the measurement by the temperature sensor 8 is considerably slower than determining the temperature in real time from the measured voltage drop across the power component 5, it cannot be expected that both methods deliver the same value for the temperature at every point in time. However, the two approaches can be checked against each other for plausibility, and a model used for the temperature propagation in the circuit can also be checked by comparison.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Protection Of Static Devices (AREA)

Abstract

L'invention concerne un procédé permettant de faire fonctionner un circuit (3) comprenant au moins un composant de puissance (5), ledit procédé comprenant les étapes suivantes : mesurer une chute de tension au niveau dudit au moins un composant de puissance (5), déterminer une résistance interne instantanée du composant de puissance (5) à partir de la chute de tension mesurée, déterminer une puissance de perte instantanée du composant de puissance (5) à partir de la résistance interne instantanée déterminée et déterminer une température instantanée du composant de puissance (5) à partir de la puissance instantanée déterminée.
PCT/EP2023/065804 2022-06-21 2023-06-13 Procédé permettant de faire fonctionner un circuit comprenant au moins un composant de puissance WO2023247269A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022206196.9 2022-06-21
DE102022206196.9A DE102022206196A1 (de) 2022-06-21 2022-06-21 Verfahren zum Betreiben einer Schaltung umfassend zumindest ein Leistungsbauteil

Publications (1)

Publication Number Publication Date
WO2023247269A1 true WO2023247269A1 (fr) 2023-12-28

Family

ID=86896038

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2023/065804 WO2023247269A1 (fr) 2022-06-21 2023-06-13 Procédé permettant de faire fonctionner un circuit comprenant au moins un composant de puissance

Country Status (2)

Country Link
DE (1) DE102022206196A1 (fr)
WO (1) WO2023247269A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3299783B1 (fr) * 2016-09-23 2020-11-04 ABB Power Grids Switzerland AG Contrôle thermique de dispositif de puissance

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3299783B1 (fr) * 2016-09-23 2020-11-04 ABB Power Grids Switzerland AG Contrôle thermique de dispositif de puissance

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LAI WEI ET AL: "Condition Monitoring in a Power Module Using On-State Resistance and Case Temperature", IEEE ACCESS, vol. 6, 9 October 2018 (2018-10-09) - 3 December 2018 (2018-12-03), pages 67108 - 67117, XP011697055, DOI: 10.1109/ACCESS.2018.2879314 *

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