WO2023199432A1 - 異常検出装置 - Google Patents

異常検出装置 Download PDF

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Publication number
WO2023199432A1
WO2023199432A1 PCT/JP2022/017716 JP2022017716W WO2023199432A1 WO 2023199432 A1 WO2023199432 A1 WO 2023199432A1 JP 2022017716 W JP2022017716 W JP 2022017716W WO 2023199432 A1 WO2023199432 A1 WO 2023199432A1
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WIPO (PCT)
Prior art keywords
conductive path
section
power supply
abnormality
current 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.)
Ceased
Application number
PCT/JP2022/017716
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English (en)
French (fr)
Japanese (ja)
Inventor
宗克 藪田
嵩大 倉冨
成治 高橋
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.)
Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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 Sumitomo Wiring Systems Ltd, AutoNetworks Technologies Ltd, Sumitomo Electric Industries Ltd filed Critical Sumitomo Wiring Systems Ltd
Priority to JP2024515237A priority Critical patent/JP7663153B2/ja
Priority to US18/855,408 priority patent/US20250341603A1/en
Priority to CN202280094746.6A priority patent/CN118922725A/zh
Priority to PCT/JP2022/017716 priority patent/WO2023199432A1/ja
Publication of WO2023199432A1 publication Critical patent/WO2023199432A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • 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
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0092—Measuring current only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/10—Measuring sum, difference or ratio
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present disclosure relates to an abnormality detection device.
  • Patent Document 1 discloses a device for diagnosing errors in a current sensor. This device includes two current sensors that measure current values flowing through the same path. This device diagnoses errors in the current sensor based on the results of comparing the measured values of the two current sensors. Note that a device for detecting an abnormality in a current sensor is also disclosed in Patent Document 2.
  • the present disclosure provides a technology that facilitates miniaturization of a current sensor in a configuration that detects an abnormality in the current sensor.
  • the abnormality detection device of the present disclosure includes: A parallel circuit section in which a plurality of conductive paths are connected in parallel, multiple current sensors; An abnormality determination unit; Each of the current sensors detects a current flowing through each of the plurality of conductive paths, The abnormality determination unit determines whether the current sensor is abnormal based on the detected values of the plurality of current sensors.
  • the technology according to the present disclosure can facilitate miniaturization of the current sensor in a configuration that detects an abnormality in the current sensor.
  • FIG. 1 is a configuration diagram schematically illustrating a power supply system including an abnormality detection device according to a first embodiment.
  • FIG. 2 is a configuration diagram schematically illustrating a power supply system including an abnormality detection device according to a second embodiment.
  • a parallel circuit section in which a plurality of conductive paths are connected in parallel, multiple current sensors; An abnormality determination unit; Each of the current sensors detects a current flowing through each of the plurality of conductive paths, The abnormality determination unit determines abnormality of the current sensor based on detected values of the plurality of current sensors.
  • the abnormality detection device detects the current distributed in the plurality of conductive paths using each current sensor, and determines whether the current sensor is abnormal based on the detected value. Therefore, according to this configuration, since the current withstand capacity of each current sensor can be reduced, it is easy to downsize the current sensor.
  • the plurality of conductive paths include a first conductive path and a second conductive path connected in parallel to each other
  • the plurality of current sensors include a first current sensor that detects a current flowing through the first conductive path, and a second current sensor that detects a current that flows through the second conductive path,
  • the abnormality determination unit determines that there is an abnormality when the difference between the detected value of the first current sensor and the detected value of the second current sensor is out of a predetermined numerical range. Anomaly detection device.
  • the parallel circuit section is provided between a power supply section and a power supply target to which power is supplied based on the power supply section
  • the abnormality according to [1] or [2] further includes a cutoff unit that switches from an allowable state that allows power supply from the power supply unit side to the power supply target side via the parallel circuit unit to a cutoff state that cuts off the power supply. Detection device.
  • the abnormality detection device according to [3], further comprising a control unit that switches the cutoff unit from the allowable state to the cutoff state based on a detected value of at least one of the plurality of current sensors.
  • the abnormality determining section can determine whether there is an abnormality in the current sensor used to determine switching of the cutoff section.
  • the control unit determines whether each of the conductive paths is in an overcurrent state based on the detected value of each of the current sensors, and determines whether at least one of the conductive paths is in the overcurrent state.
  • the abnormality detection device according to [4], wherein when it is determined that there is an abnormality, the shutoff section is switched from the allowable state to the shutoff state.
  • the control unit determines whether each of the conductive paths is in an overcurrent state based on the detected value of each of the current sensors, and determines whether two or more of the conductive paths are in the overcurrent state.
  • the abnormality detection device according to [4], wherein when it is determined that there is an abnormality, the shutoff section is switched from the allowable state to the shutoff state.
  • the plurality of current sensors used for determining an abnormality can be effectively utilized to prevent erroneous determination of an overcurrent state.
  • the parallel circuit section is provided between a power supply section and a power supply target to which power is supplied based on the power supply section, One end of the parallel circuit section is electrically connected to a power supply section side conductive path provided closer to the power supply section than the parallel circuit section;
  • the abnormality detection device according to any one of [1] to [6], which is electrically connected to a target-side conductive path provided on the supply target side.
  • each of the current sensors has a shunt resistor provided in each of the conductive paths.
  • the configuration of the current sensor can be easily simplified.
  • each of the current sensors has a magnetic detection section that detects magnetism generated by the current flowing through each of the conductive paths and converts it into an electric signal. Anomaly detection device.
  • the current flowing through the conductive path can be detected without providing a resistance in the conductive path.
  • FIG. 1 shows a power supply system 1 including an abnormality detection device 10 according to the first embodiment.
  • the power supply system 1 is a system mounted on a vehicle, and is a system that can supply power to various power supply targets.
  • the power supply system 1 includes a power supply section 2, a load 3, a power path 4, and an abnormality detection device 10.
  • the power path 4 is provided between the power supply section 2 and the load 3 and functions as a path for supplying power from the power supply section 2 to the load 3.
  • the power path 4 includes a positive conductive path 5 and a negative conductive path 6.
  • the power supply unit 2 is an on-vehicle power supply that can supply power to the load 3.
  • the power supply unit 2 is configured as, for example, a known vehicle battery such as a lead battery.
  • the power supply section 2 may be constituted by a battery other than a lead battery, and may have a power source means other than the battery instead of or in addition to the battery.
  • the positive electrode of the power supply unit 2 is electrically connected to one end of the positive conductive path 5 in a short-circuited configuration to one end of the positive conductive path 5 .
  • the negative electrode of the power supply unit 2 is electrically connected to one end of the negative conductive path 6 in a configuration in which it is short-circuited to one end of the negative conductive path 6 .
  • the power supply unit 2 applies a predetermined DC voltage (for example, 12V) to the power path 4 when fully charged.
  • the power supply unit 2 supplies power to a power path 4 and supplies power to a load 3 via the power path 4 .
  • the load 3 corresponds to an example of a power supply target, and is an electrical component mounted on a vehicle.
  • the load 3 operates in response to power supplied via the power path 4 .
  • One end of the load 3 is electrically connected to the other end of the positive conductive path 5 in a short-circuited configuration.
  • the other end of the load 3 is electrically connected to the other end of the negative conductive path 6 in a short-circuited configuration.
  • the abnormality detection device 10 is mounted on a vehicle and used in the power supply system 1.
  • the abnormality detection device 10 includes a parallel circuit section 11 , a plurality of current sensors 12 , an abnormality determination section 13 , a cutoff section 14 , and a control section 15 .
  • the parallel circuit section 11 has a configuration in which a plurality of conductive paths 20 are connected in parallel.
  • the parallel circuit section 11 is provided between the power supply section 2 and the load 3.
  • the parallel circuit section 11 is provided in the power path 4 (more specifically, the negative conductive path 6), and constitutes a part of the power path 4 (more specifically, the negative conductive path 6).
  • the parallel circuit section 11 forms part of a path for supplying power from the power supply section 2 to the load 3.
  • One end of the parallel circuit section 11 is electrically connected to the power supply section side conductive path 7 in a short-circuited configuration to the power supply section side conductive path 7 provided closer to the power supply section 2 than the parallel circuit section 11 .
  • the other end of the parallel circuit section 11 is electrically connected to a target-side conductive path 8 provided closer to the load 3 than the parallel circuit section 11 .
  • the plurality of conductive paths 20 are connected in parallel between the power source side conductive path 7 and the target side conductive path 8.
  • the power source side conductive path 7 and the target side conductive path 8 constitute a part of the negative electrode side conductive path 6.
  • One end of the power source section side conductive path 7 is electrically connected to the negative electrode of the power source section 2 in a short-circuited configuration to the negative electrode of the power source section 2 .
  • the other end of the power source side conductive path 7 is electrically connected to one end of the parallel circuit section 11 in a short-circuited configuration.
  • One end of the target-side conductive path 8 is electrically connected to the other end of the load 3 in a short-circuited configuration.
  • the other end of the target-side conductive path 8 is electrically connected to the other end of the parallel circuit section 11 in a short-circuited configuration.
  • the plurality of conductive paths 20 include a first conductive path 20A and a second conductive path 20B.
  • the first conductive path 20A and the second conductive path 20B are connected in parallel between the power source side conductive path 7 and the target side conductive path 8.
  • One end of each conductive path 20 is short-circuited to the power source side conductive path 7 (more specifically, the other end of the power source side conductive path 7). (the other end of the power source side conductive path 7).
  • the other end of each conductive path 20 is configured to be short-circuited to the target side conductive path 8 (more specifically, the other end of the target side conductive path 8). (the other end of the conductive path 8).
  • Each current sensor 12 detects the current flowing through each conductive path 20.
  • the plurality of current sensors 12 include a first current sensor 12A and a second current sensor 12B.
  • the first current sensor 12A detects the current flowing through the first conductive path 20A.
  • the second current sensor 12B detects the current flowing through the second conductive path 20B.
  • Information that allows identification of the detected value of each current sensor 12 is input to the abnormality determination section 13 and the control section 15, respectively.
  • Each current sensor 12 includes a shunt resistor 21 provided in each conductive path 20, and a differential amplifier circuit 22 that amplifies and outputs the potential difference between both ends of the shunt resistor 21.
  • One end of each shunt resistor 21 is short-circuited to the power source side conductive path 7 (more specifically, the other end of the power source side conductive path 7). (the other end of the power source side conductive path 7).
  • the other end of each shunt resistor 21 is configured to be short-circuited to the target side conductive path 8 (more specifically, the other end of the target side conductive path 8). (the other end of the conductive path 8).
  • the first current sensor 12A includes a first shunt resistor 21A provided in the first conductive path 20A, and a first differential amplifier circuit 22A that amplifies and outputs the potential difference between both ends of the first shunt resistor 21A.
  • the second current sensor 12B includes a second shunt resistor 21B provided in the second conductive path 20B, and a second differential amplifier circuit 22B that amplifies and outputs the potential difference between both ends of the second shunt resistor 21B.
  • the resistance value of the first shunt resistor 21A is the same as the resistance value of the second shunt resistor 21B.
  • the abnormality determination unit 13 is configured to include an information processing device such as an MCU (Micro Controller Unit).
  • the detection value of each current sensor 12 is input to the abnormality determination section 13 .
  • the abnormality determination unit 13 determines whether the current sensor 12 is abnormal based on the detected value of each current sensor 12 .
  • the abnormality determination unit 13 determines that at least one of the first current sensor 12A and the second current sensor 12B is abnormal based on the detected value of the first current sensor 12A and the detected value of the second current sensor 12B. It is determined that The abnormality determination unit 13 determines that there is an abnormality when the difference between the detected value of the first current sensor 12A and the detected value of the second current sensor 12B is out of a predetermined numerical range.
  • the cutoff section 14 has a function of switching from an allowable state in which power is allowed to be supplied from the power supply section 2 side to the load 3 side via the parallel circuit section 11 to a cutoff state in which it is cut off.
  • the cutoff section 14 includes a switch 14A.
  • the switch 14A may be a semiconductor switch such as a field effect transistor (FET), or may be a mechanical switch.
  • FET field effect transistor
  • the cutoff section 14 is switched to the allowable state when the switch 14A is switched to the on state, and switched to the cutoff state when the switch 14A is switched to the off state.
  • the cutoff section 14 is provided in the target side conductive path 8, but may be provided in the power supply section side conductive path 7, or may be provided in the positive electrode side conductive path 5.
  • the control unit 15 includes, for example, an information processing device such as an MCU (Micro Controller Unit).
  • the detection value of each current sensor 12 is input to the control unit 15 .
  • the control unit 15 determines whether each conductive path 20 is in an overcurrent state based on the detected value of each current sensor 12. For example, when the detected value of the current sensor 12 exceeds a threshold value, the control unit 15 determines that the conductive path 20 to be detected by the current sensor 12 is in an overcurrent state.
  • the control unit 15 determines that at least one conductive path 20 (in this embodiment, at least one of the first conductive path 20A and the second conductive path 20B) is in an overcurrent state
  • the control unit 15 sets the interrupting unit 14 to an allowable state. Switch to the cut-off state.
  • the control unit 15 turns on the switch 14A and maintains the cutoff unit 14 in the permissible state. In this state, power based on the power supply section 2 can be supplied to the load 3.
  • the abnormality determining unit 13 repeatedly determines whether the difference between the detected value of the first current sensor 12A and the detected value of the second current sensor 12B is out of a predetermined numerical range. Then, the abnormality determination unit 13 determines that an abnormality occurs when it is determined that the difference between the detected value of the first current sensor 12A and the detected value of the second current sensor 12B is out of a predetermined numerical range.
  • the control unit 15 repeatedly determines whether at least one of the first conductive path 20A and the second conductive path 20B is in an overcurrent state. When the control unit 15 determines that at least one of the first conductive path 20A and the second conductive path 20B is in an overcurrent state, the control unit 15 switches the interrupting unit 14 from the allowable state to the interrupting state.
  • the abnormality detection device 10 detects the current distributed in the plurality of conductive paths 20 by each current sensor 12, and determines whether the current sensor 12 is abnormal based on the detected value. Therefore, according to this configuration, the current withstand capacity of each current sensor 12 can be reduced.
  • each conductive path 20 is provided with a shunt resistor 21 having the same resistance value. Therefore, the current flowing through each conductive path 20 is halved, and the current It becomes possible to use the current sensor 12 with half the withstand capacity. Therefore, it is easy to downsize the current sensor 12.
  • the abnormality determination unit 13 determines that there is an abnormality when the difference between at least the detection value of the first current sensor 12A and the detection value of the second current sensor 12B is out of a predetermined numerical range. According to this configuration, the configuration for determining abnormality of the current sensor 12 can be more easily simplified.
  • the abnormality detection device 10 includes a cutoff unit 14 that switches from an allowable state in which power is allowed to be supplied from the power supply unit 2 side to the load 3 side via the parallel circuit unit 11 to a cutoff state in which it is cut off. According to this configuration, the power supply from the power supply section 2 side to the load 3 side via the parallel circuit section 11 can be cut off by switching the cutoff section 14 from the allowable state to the cutoff state.
  • the abnormality detection device 10 includes a control unit 15 that switches the cutoff unit 14 from the allowable state to the cutoff state based on the detected value of at least one of the plurality of current sensors 12. According to this configuration, the power supply from the power supply section 2 side to the load 3 side via the parallel circuit section 11 can be cut off based on the detected value of the current sensor 12. Furthermore, the abnormality determining unit 13 can determine whether the current sensor 12 used to determine whether to switch the cut-off unit 14 is abnormal.
  • control unit 15 determines whether each conductive path 20 is in an overcurrent state based on the detected value of each current sensor 12, and determines whether at least one conductive path 20 is in an overcurrent state. If it is determined, the shutoff unit 14 is switched from the allowable state to the shutoff state.
  • the plurality of current sensors 12 in this embodiment, the first current sensor 12A and the second current sensor 12B
  • the plurality of current sensors 12 used for abnormality determination can be effectively utilized for quick switching of the interrupting section 14. Can be done.
  • each current sensor 12 has a shunt resistor 21 provided in each conductive path 20. According to this configuration, the configuration of the current sensor 12 can be easily simplified.
  • the power supply system 201 of the second embodiment differs from the power supply system 1 of the first embodiment in the configuration of the current sensor, and is common in other points.
  • the same components as in the first embodiment will be given the same reference numerals and detailed description will be omitted.
  • FIG. 2 shows a power supply system 201 of a second embodiment.
  • the power supply system 201 includes a power supply section 2, a load 3, a power path 4, and an abnormality detection device 210.
  • the abnormality detection device 210 is mounted on a vehicle and used in the power supply system 201.
  • the abnormality detection device 210 includes a parallel circuit section 211 , a plurality of current sensors 212 , an abnormality determination section 13 , a cutoff section 14 , and a control section 15 .
  • the parallel circuit section 211 has a configuration in which a plurality of conductive paths 220 are connected in parallel.
  • the parallel circuit section 211 is provided between the power supply section 2 and the load 3.
  • the parallel circuit section 211 is provided in the power path 4 (more specifically, the negative conductive path 6), and constitutes a part of the power path 4 (more specifically, the negative conductive path 6).
  • the parallel circuit section 211 constitutes a part of the path for supplying power from the power supply section 2 to the load 3.
  • One end of the parallel circuit section 211 is electrically connected to the power supply section side conductive path 7 in a configuration in which it is short-circuited to the power supply section side conductive path 7 provided closer to the power supply section 2 than the parallel circuit section 211 is.
  • the other end of the parallel circuit section 211 is electrically connected to the target-side conductive path 8 provided closer to the load 3 than the parallel circuit section 211 .
  • the plurality of conductive paths 220 are connected in parallel between the power source side conductive path 7 and the target side conductive path 8.
  • the plurality of conductive paths 220 include a first conductive path 220A and a second conductive path 220B.
  • the first conductive path 220A and the second conductive path 220B are connected in parallel between the power source side conductive path 7 and the target side conductive path 8.
  • One end of each conductive path 220 is short-circuited to the power source side conductive path 7 (more specifically, the other end of the power source side conductive path 7). (the other end of the power source side conductive path 7).
  • the other end of each conductive path 220 is configured to be short-circuited to the target side conductive path 8 (more specifically, the other end of the target side conductive path 8). (the other end of the conductive path 8).
  • Each current sensor 212 detects the current flowing through each conductive path 220.
  • the plurality of current sensors 212 include a first current sensor 212A and a second current sensor 212B.
  • the first current sensor 212A detects the current flowing through the first conductive path 220A.
  • the second current sensor 212B detects the current flowing through the second conductive path 220B.
  • Information that allows identification of the detection value of each current sensor 212 is input to the abnormality determination section 13 and the control section 15, respectively.
  • Each current sensor 212 is a non-contact sensor that is placed in a non-contact manner with respect to the conductive path 220 that is the object of current detection.
  • Each current sensor 212 has a magnetic detection section 221 that detects magnetism generated by a current flowing through each conductive path 220 and converts it into an electric signal.
  • the magnetic detection unit 221 may have a configuration including a Hall element or a magnetoresistive element.
  • Current sensor 212 is not in contact with conductive path 220. That is, the other end of the power source side conductive path 7 is electrically connected to the other end of the target side conductive path 8 via the parallel circuit section 211 in a short-circuited configuration to the other end of the target side conductive path 8 .
  • the first current sensor 212A has a first magnetic detection section 221A provided on the first conductive path 220A.
  • the first magnetic detection unit 221A detects the magnetism generated by the current flowing through the first conductive path 220A and converts it into an electric signal.
  • the second current sensor 212B has a second magnetic detection section 221B provided on the second conductive path 220B.
  • the second magnetic detection unit 221B detects magnetism generated by the current flowing through the second conductive path 220B and converts it into an electrical signal.
  • the abnormality determining unit 13 determines whether the current sensor 212 is abnormal based on the detected value of each current sensor 212. The abnormality determination unit 13 determines that there is an abnormality when the difference between the detected value of the first current sensor 212A and the detected value of the second current sensor 212B is out of a predetermined numerical range.
  • the cutoff section 14 has a function of switching from an allowable state in which power is allowed to be supplied from the power supply section 2 side to the load 3 side via the parallel circuit section 211 to a cutoff state in which it is cut off.
  • the control unit 15 determines whether each conductive path 220 is in an overcurrent state based on the detected value of each current sensor 212. For example, when the detection value of the current sensor 212 exceeds a threshold value, the control unit 15 determines that the conductive path 220 to be detected by the current sensor 212 is in an overcurrent state. For example, when the control unit 15 determines that at least one of the first conductive path 220A and the second conductive path 220B is in an overcurrent state, the control unit 15 switches the cutoff unit 14 from the allowable state to the cutoff state.
  • the current flowing through the conductive path 220 can be detected without providing a resistance in the conductive path 220.
  • the number of conductive paths connected in parallel to each other may be three or more.
  • the number of current sensors may be three or more.
  • the method by which the abnormality determination unit determines an abnormality is not limited to the method of determining an abnormality when the difference between the detected value of the first current sensor and the detected value of the second current sensor is out of a predetermined numerical range.
  • the abnormality determination unit may determine in advance the difference between the integrated value or average value of the plurality of detection values of the first current sensor in a predetermined period and the integrated value or average value of the plurality of detection values of the second current sensor in the predetermined period.
  • a configuration may also be adopted in which it is determined that there is an abnormality when the value falls outside a predetermined numerical range. According to this configuration, for example, when the detected value of the current sensor is AD converted, errors caused by AD conversion can be reduced.
  • the abnormality determining section may be configured to determine whether or not the numerical value falls outside the numerical range a predetermined number of times, and determines that the abnormality is abnormal when the ratio of the deviations determined exceeds a reference value.
  • the method by which the control unit determines the overcurrent state is not limited to the method of determining that the conductive path to be detected by the current sensor is in the overcurrent state when the detected value of the current sensor exceeds a threshold value. For example, if the integrated value or average value of a plurality of detection values of the current sensor in a predetermined period exceeds a threshold value, the control unit may determine that the conductive path to be detected by the current sensor is in an overcurrent state. good. As another example, the control unit may determine that the conductive path to be detected by the current sensor is in an overcurrent state when a state in which the detected value of the current sensor exceeds a threshold continues for a determination period. . A plurality of combinations of threshold values and determination times may be prepared.
  • the condition for the control unit to switch the cutoff unit to the cutoff state is not limited to determining that at least one of the first conductive path and the second conductive path is in an overcurrent state.
  • the control unit may be configured to switch the interrupting unit to the interrupting state when it is determined that both the first conductive path and the second conductive path are in the overcurrent state.
  • the plurality of current sensors used for determining an abnormality can be effectively utilized to prevent erroneous determination of an overcurrent state.
  • the control unit monitors only one of the first conductive path and the second conductive path, and when it is determined that the monitored conductive path is in an overcurrent state, the control unit sets the interrupting unit to the disconnected state. It may be configured to switch.
  • control section may be configured to switch the cutoff section to the cutoff state when it is determined that all the conduction paths are in the overcurrent state, or may be configured to switch the cutoff section to the cutoff state,
  • the configuration may also be such that the cutoff section is switched to the cutoff state when it is determined that the number of conductive paths is in the overcurrent state.
  • the cutoff section may be configured such that it cannot return to the allowable state after entering the cutoff state.
  • the interrupter may be a pyrotechnic circuit breaker that disconnects the power path when the drive current is supplied.
  • the resistance values of the shunt resistors provided in each conductive path do not have to be the same. Even with this configuration, it is possible to use a current sensor with a smaller short-circuit tolerance.
  • the parallel circuit section may be provided in the positive conductive path instead of the negative conductive path.
  • the abnormality detection device may have a configuration that does not include a blocking section.
  • the abnormality detection device may have a configuration that does not include a control unit.
  • Power supply system 2 Power supply unit 3: Load (power supply target) 4: Power path 5: Positive conductive path 6: Negative conductive path 7: Power source side conductive path 8: Target side conductive path 10: Abnormality detection device 11: Parallel circuit section 12: Current sensor 12A: First current sensor 12B : Second current sensor 13 : Abnormality determination unit 14 : Cut-off unit 14A : Switch 15 : Control unit 20 : Conductive path 20A : First conductive path 20B : Second conductive path 21 : Shunt resistor 21A : First shunt resistor 21B : First 2 shunt resistor 22: Differential amplifier circuit 22A: First differential amplifier circuit 22B: Second differential amplifier circuit 201: Power supply system 210: Abnormality detection device 211: Parallel circuit section 212: Current sensor 212A: First current sensor 212B : Second current sensor 220 : Conductive path 220A : First conductive path 220B : Second conductive path 221 : Magnetic sensing part 221A :

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  • General Physics & Mathematics (AREA)
  • Emergency Protection Circuit Devices (AREA)
PCT/JP2022/017716 2022-04-13 2022-04-13 異常検出装置 Ceased WO2023199432A1 (ja)

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JP2024515237A JP7663153B2 (ja) 2022-04-13 2022-04-13 異常検出装置
US18/855,408 US20250341603A1 (en) 2022-04-13 2022-04-13 Abnormality detection device
CN202280094746.6A CN118922725A (zh) 2022-04-13 2022-04-13 异常检测装置
PCT/JP2022/017716 WO2023199432A1 (ja) 2022-04-13 2022-04-13 異常検出装置

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007099033A (ja) * 2005-10-03 2007-04-19 Mazda Motor Corp 電流センサの異常検出装置
JP2010252566A (ja) * 2009-04-17 2010-11-04 Panasonic Corp 充放電制御回路、及び電源装置
JP2010252594A (ja) * 2009-04-20 2010-11-04 Panasonic Corp 蓄電装置
JP2014155327A (ja) * 2013-02-08 2014-08-25 Toyota Industries Corp 車載電源装置
JP2017079576A (ja) * 2015-10-22 2017-04-27 株式会社オートネットワーク技術研究所 車載用電源装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6728991B2 (ja) * 2016-05-31 2020-07-22 株式会社オートネットワーク技術研究所 リレー装置及び電源装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007099033A (ja) * 2005-10-03 2007-04-19 Mazda Motor Corp 電流センサの異常検出装置
JP2010252566A (ja) * 2009-04-17 2010-11-04 Panasonic Corp 充放電制御回路、及び電源装置
JP2010252594A (ja) * 2009-04-20 2010-11-04 Panasonic Corp 蓄電装置
JP2014155327A (ja) * 2013-02-08 2014-08-25 Toyota Industries Corp 車載電源装置
JP2017079576A (ja) * 2015-10-22 2017-04-27 株式会社オートネットワーク技術研究所 車載用電源装置

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CN118922725A (zh) 2024-11-08
JPWO2023199432A1 (https=) 2023-10-19
JP7663153B2 (ja) 2025-04-16
US20250341603A1 (en) 2025-11-06

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