WO2024013842A1 - 車両用の遮断装置 - Google Patents

車両用の遮断装置 Download PDF

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Publication number
WO2024013842A1
WO2024013842A1 PCT/JP2022/027379 JP2022027379W WO2024013842A1 WO 2024013842 A1 WO2024013842 A1 WO 2024013842A1 JP 2022027379 W JP2022027379 W JP 2022027379W WO 2024013842 A1 WO2024013842 A1 WO 2024013842A1
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WO
WIPO (PCT)
Prior art keywords
switch
state
power path
current
resistance value
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/JP2022/027379
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
幸貴 内田
貴史 川上
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 CN202280097968.3A priority Critical patent/CN119487598A/zh
Priority to DE112022007517.1T priority patent/DE112022007517T5/de
Priority to US18/992,465 priority patent/US20260011999A1/en
Priority to JP2024533360A priority patent/JP7779391B2/ja
Priority to PCT/JP2022/027379 priority patent/WO2024013842A1/ja
Priority to PCT/JP2023/014615 priority patent/WO2024014072A1/ja
Priority to US18/881,518 priority patent/US20250370046A1/en
Priority to JP2024533513A priority patent/JP7769924B2/ja
Priority to CN202380051702.XA priority patent/CN119487600A/zh
Publication of WO2024013842A1 publication Critical patent/WO2024013842A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • 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
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
    • G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
    • 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
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • 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
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/74—Testing of fuses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/0015—Means for testing or for inspecting contacts, e.g. wear indicator
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H02H3/044—Checking correct functioning of protective arrangements, e.g. by simulating a fault
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/40—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to ratio of voltage and current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
    • H01H47/32—Energising current supplied by semiconductor device
    • H01H47/325—Energising current supplied by semiconductor device by switching regulator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for DC applications

Definitions

  • the present disclosure relates to a shutoff device for a vehicle.
  • Patent Document 1 discloses a power supply device that supplies power stored in a battery to a load by controlling a semiconductor switch on and off using a semiconductor switch driver.
  • the present disclosure has been made based on the above-mentioned circumstances, and aims to provide a vehicular cutoff device that can be operated while maximizing the durability of the switch.
  • the vehicle shutoff device of the present disclosure includes: A disconnection device for a vehicle having a switch that switches a power path, which is a path for transmitting electric power based on a power supply unit, between a conductive state and a disconnected state, a control unit that executes a deterioration determination process that compares a resistance value of the switch with a resistance threshold; When the resistance value is greater than or equal to the resistance threshold, the control unit determines that the switch is in a deteriorated state, and notifies the outside that it is in the deteriorated state.
  • FIG. 1 is a circuit diagram illustrating a vehicle power supply system including a vehicle cutoff device according to a first embodiment.
  • FIG. 2 is a flowchart illustrating an example of control by the control unit in the vehicle shutoff device according to the first embodiment.
  • FIG. 3 is a graph showing changes over time in the resistance value of the first switch.
  • FIG. 4 is a circuit diagram showing the connection position of the voltage detection section to the low potential side power path in another embodiment.
  • the vehicle shutoff device of the present disclosure includes: [1] A disconnection device for a vehicle that includes a switch that switches a power path, which is a path for transmitting electric power from a power source, between a conductive state and a disconnected state.
  • the disconnection device includes a control unit that executes a deterioration determination process that compares the resistance value of the switch with a resistance threshold value. When the resistance value is greater than or equal to the resistance threshold, the control unit determines that the switch is in a deteriorated state, and notifies the outside that the switch is in a deteriorated state.
  • the resistance value in the switch can be used as an index for estimating the state of the switch. Therefore, it is possible to determine whether or not the switch is in a deteriorated state in accordance with the state of the switch itself, making it easy to bring out the durability of the switch. Furthermore, since the structure is configured to notify the outside of the deterioration state, it is easy to take appropriate measures externally depending on the state of the switch.
  • the deteriorated state refers to a state in which the switch has changed in quality compared to when it was originally installed in the disconnection device, and the performance of switching the power path between the conductive state and the disconnected state has deteriorated.
  • the resistance value is determined by the potential difference on both sides of the switch when the switch is on and current flows through the power path, and the current flowing through the power path. Can be based on.
  • the resistance value based on the potential difference on both sides of the switch and the current flowing through the power path is equal to or higher than a threshold value.
  • the vehicle disconnection device of [2] above may further include a second switch that switches the power path between a conductive state and a disconnected state.
  • the configuration may be such that switching control is executed in which the switch is switched from the off state to the on state after the second switch, so that energization of the power path is started or the current increases.
  • the control unit may execute a deterioration determination process that compares the resistance value when the switching control is executed and the resistance threshold value.
  • the power path may include a high potential side power path and a low potential side power path having a lower potential than the high potential side power path.
  • a second switch may be provided on either the high potential side power path or the low potential side power path, and a switch may be provided on the other.
  • it may include a resistor and a third switch connected in series to the resistor, and may have a parallel switching path in which the resistor and the third switch are connected in parallel to the switch. .
  • the switching control is performed by turning the switch off and turning on the second switch and the third switch to start energizing the power path, and then turning the switch on while keeping the second switch on. It can be a control to switch to.
  • control section can detect the voltage between both terminals of the switch.
  • the vehicle shutoff device of [5] above can more accurately detect the resistance value of the target switch.
  • control unit compares the resistance value when the magnitude of the current flowing in the power path is equal to or greater than the current threshold value and the resistance threshold value. Deterioration determination processing can be executed.
  • the vehicle cut-off device in [6] above has a configuration that compares the current flowing in the power path with a current threshold value, so for example, the current state used when detecting the resistance value is adjusted to the state appropriate for detecting the resistance value. The reliability of the calculated resistance value can be improved.
  • a vehicle power supply system 100 shown in FIG. 1 is a power supply system mounted on a vehicle, and includes a power supply section 10 and a cutoff device 1.
  • the cutoff device 1 includes a power path 11 , a system main relay 33 , a current detection section 38 , a voltage detection section 39 , and a control section 15 .
  • the vehicle power supply system 100 is configured to be able to supply power from the power supply unit 10 to the load 35 via a power line 11 that is a path through which power is transmitted between the power supply unit 10 and the load 35 .
  • the power supply unit 10 is a battery that can supply power to the load 35.
  • the power supply unit 10 is, for example, a lead battery, an assembled battery configured by combining a plurality of single cells such as a lithium ion battery, a nickel hydride battery, etc. in series, or the like.
  • the power path 11 includes a high potential side power path 17 and a low potential side power path 20.
  • the high potential side power path 17 is electrically connected to the high potential side terminal of the power supply unit 10.
  • the output voltage of the power supply section 10 is applied to the high potential side power path 17 .
  • the low potential side power path 20 is electrically connected to the low potential side terminal of the power supply unit 10.
  • the low potential side power path 20 has a lower potential than the high potential side power path 17.
  • the output voltage of the power supply section 10 corresponds to the potential difference between the high potential side terminal and the low potential side terminal.
  • the power path 11 is a path for transmitting electric power from the power supply section 10 to the load 35.
  • the high potential side power path 17 is provided with a fuse F interposed therebetween. Fuse F cuts off current to the high potential side power path 17 when excessive current flows through the high potential side power path 17 .
  • to be electrically connected desirably refers to a configuration in which they are connected in a mutually conductive state (a state in which current can flow) so that the potentials of both objects to be connected are equalized.
  • the configuration is not limited to this.
  • “to be electrically connected” may refer to a configuration in which both connection objects are connected in a state where they can be electrically conductive, with an electrical component interposed between the two connection objects.
  • a load 35 is electrically connected to the high potential side power path 17 and the low potential side power path 20.
  • the load 35 is an in-vehicle electronic component, and for example, products such as electric components, ECUs, and ADAS target components are applicable.
  • the current output from the high potential side terminal of the power supply section 10 flows in the order of the high potential side power path 17, the load 35, the low potential side power path 20, and the low potential side terminal of the power source section 10.
  • the system main relay 33 is provided interposed in the high potential side power path 17 and the low potential side power path 20 between the power supply section 10 and the load 35.
  • the system main relay 33 has a first switch 33A, a second switch 33B, and a parallel switching path 33C.
  • the first switch 33A and the second switch 33B are, for example, relay switches that have internal contacts that physically switch between a contacted state and a separated state.
  • the parallel switching path 33C includes a resistor 33D and a third switch 33E connected in series to the resistor 33D.
  • the third switch 33E is a relay switch having the same configuration as the first switch 33A and the second switch 33B.
  • the third switch 33E is a so-called precharge relay.
  • the first switch 33A is provided on the low potential side power path 20.
  • the second switch 33B is provided on the high potential side power path 17 on the opposite side of the power supply unit 10 with the fuse F interposed therebetween.
  • the resistor 33D and the third switch 33E of the parallel switching path 33C are electrically connected to the low potential side power path 20 so as to be parallel to the first switch 33A.
  • the first switch 33A, the second switch 33B, and the third switch 33E are controlled by a predetermined control device C (hereinafter also simply referred to as control device C) to switch between an on state and an off state. .
  • the first switch 33A, the second switch 33B, and the third switch 33E switch the power path 11 between a conduction state and a cutoff state by switching between an on state and an off state.
  • the current detection unit 38 is provided interposed in the low potential side power path 20 closer to the power supply unit 10 than the first switch 33A.
  • the current detection unit 38 includes, for example, a resistor and a differential amplifier, and detects a value indicating the current flowing through the low potential side power path 20 (specifically, a value corresponding to the value of the current flowing through the low potential side power path 20).
  • the configuration is such that it can output analog voltage (analog voltage) as a current value A. That is, the current detection unit 38 detects the current state of the current flowing through the power path 11 as the current value A.
  • the voltage detection unit 39 is configured as a voltage detection circuit, for example, and has a configuration capable of outputting a voltage value V corresponding to the potential difference between the terminal on the power supply unit 10 side and the terminal on the load 35 side in the first switch 33A. Eggplant. That is, the voltage detection unit 39 detects the voltage state of the voltage in the power line 11 as the voltage value V. In other words, the voltage detection unit 39 detects terminals on both sides of the power supply unit 10 side and the load 35 side of the first switch 33A (both terminals on the side where power is supplied to the first switch 33A and the side where power is output). The potential difference at the terminal) is detected as a voltage value V.
  • the control unit 15 is configured as, for example, a microcomputer, and includes a storage unit 15D configured with a CPU, ROM, RAM, nonvolatile memory, and the like.
  • the control section 15 includes a resistance value calculation section 15A, a deterioration detection section 15B, and a notification function section 15C.
  • the resistance value calculation unit 15A is configured to receive a current value A and a voltage value V from each of the current detection unit 38 and the voltage detection unit 39, and calculates and detects the resistance value R based on these values. .
  • the resistance value R is determined by dividing the voltage value V by the current value A.
  • the control unit 15 detects the voltage between both terminals of the first switch 33A based on the voltage value V from the voltage detection unit 39.
  • the deterioration detection unit 15B is configured to perform a deterioration determination process that compares the resistance value R calculated by the resistance value calculation unit 15A and the resistance threshold value Th1 stored in the storage unit 15D of the control unit 15. .
  • the deterioration detection unit 15B is configured to output a deterioration signal Sd when it determines that the magnitude of the resistance value R is equal to or greater than the resistance threshold Th1 in the deterioration determination process.
  • the deterioration signal Sd is output when the first switch 33A is in a deteriorated state. That is, the control unit 15 determines that the first switch 33A is in a deteriorated state when the resistance value R is equal to or greater than the resistance threshold Th1.
  • the control unit 15 determines that the first switch 33A is not in a deteriorated state.
  • the notification function unit 15C is configured by, for example, a communication device, and performs notification by transmitting information to an external device (not shown) such as a BMS (battery management system) based on the input of the deterioration signal Sd from the deterioration detection unit 15B. make up a composition.
  • an external device not shown
  • BMS battery management system
  • step S1 is executed and the ignition switch is switched from off to on.
  • step S2 the on signal Son (see FIG. 1) is output from the control device C, and the first switch 33A, the second switch 33B, and the third switch 33E are activated based on the on signal Son.
  • Switching control for switching from an off state to an on state is executed. Specifically, in the switching control, based on the on signal Son output from the control device C, the second switch 33B, the third switch 33E, and the first switch 33A are switched from the off state to the on state in this order.
  • the switching control is performed by turning on the second switch 33B and third switch 33E while turning off the first switch 33A to start energizing the power path 11, and then turning on the second switch 33B and the third switch 33E.
  • This is control to switch the first switch 33A to the on state while maintaining the third switch 33E in the on state. That is, the first switch 33A is switched from the off state to the on state after the second switch 33B.
  • the timing at which the on-signal Son is output from the control device C to each switch can be varied in various ways. In other words, the control device C can perform control different from switching control.
  • the timing of switching the first switch 33A to the on state can be shifted. Note that when the second switch 33B and the third switch 33E are turned on, the power path 11 starts to be energized. Since the resistor 33D is connected in series to the third switch 33E, the current begins to flow slowly through the power path 11 so that the current gradually increases.
  • the power path 11 enters a conductive state that allows power to be supplied from the power supply unit 10 to the load 35.
  • a rush current immediately flows through the first switch 33A.
  • a current rise occurs in which the current value A flowing in the power path 11 suddenly increases.
  • the inrush current continues to flow for a predetermined short time after the first switch 33A is turned on, and after the predetermined short time has passed, the current flowing through the first switch 33A is a predetermined amount smaller than the inrush current. settle down to stay within the range of. In this way, the first switch 33A is turned on, and current flows through the power path 11.
  • step S3 the control unit 15 determines whether a predetermined short time period has elapsed since the power path 11 was switched to the conductive state (when the first switch 33A was switched to the on state). .
  • the control unit 15 has a timer function and is configured to be able to measure a predetermined short time from when the power path 11 is switched to a conductive state. Whether the power path 11 has been switched to the conductive state can be determined, for example, based on the degree to which the value of the current value A changes within a predetermined time (the amount of change in the current value A per unit time).
  • step S3 if the control unit 15 determines that a predetermined short time has not elapsed since the power path 11 was switched to the conductive state (No in step S3), the process of step S3 is repeated.
  • step S3 when the control unit 15 determines that a predetermined short time has elapsed since the power path 11 was switched to the conductive state (Yes in step S3), the process moves to step S4.
  • step S4 the control unit 15 determines whether the magnitude of the current value A remains within a predetermined range. For example, the control unit 15 compares the current value A input from the current detection unit 38 with a current threshold Th2 stored in the storage unit 15D of the control unit 15 and an upper limit current threshold Th3 larger than the current threshold Th2. It is configured to do this.
  • control unit 15 uses its own timer function to determine whether the current value A is greater than or equal to the current threshold value Th2 and smaller than the upper limit current threshold value Th3 for a predetermined period of time (i.e., the current value flowing through the power path 11 ).
  • the structure is such that it can be determined whether the current fluctuation has stabilized or not.
  • step S4 if the control unit 15 determines that the state in which the magnitude of the current value A is greater than or equal to the current threshold value Th2 and smaller than the upper limit current threshold value Th3 does not continue for a predetermined period of time (No in step S4), step S4 Repeat the process.
  • step S4 when the control unit 15 determines that the state in which the magnitude of the current value A is greater than or equal to the current threshold Th2 and smaller than the upper current threshold Th3 continues for a predetermined period of time (Yes in step S4), the process moves to step S5. do. Proceeding to step S5, the control unit 15 obtains a resistance value R in the resistance value calculation unit 15A based on the current value A and the voltage value V input from each of the current detection unit 38 and the voltage detection unit 39. . That is, the control unit 15 detects the resistance value R when the magnitude of the current value A flowing through the power path 11 is equal to or greater than the current threshold value Th2. Then, the process moves to step S6.
  • the control unit 15 executes a deterioration determination process in which the resistance value R and the resistance threshold value Th1 are compared in the deterioration detection unit 15B.
  • the control unit 15 executes a deterioration determination process that compares the resistance value R when the switching control by the control device C is executed and the resistance threshold value Th1. For example, in the deterioration determination process, if it is determined that the magnitude of the resistance value R is greater than or equal to the resistance threshold Th1 (Yes in step S6), the process proceeds to step S7, and the deterioration detection section 15B outputs the deterioration signal Sd.
  • the control unit 15 executes a deterioration determination process that compares the resistance value R when the magnitude of the current flowing through the power path 11 is equal to or greater than the current threshold value Th2 and the resistance threshold value Th1.
  • the control unit 15 controls the voltage value V (potential difference) on both sides of the first switch 33A when the first switch 33A is on and current flows through the power path 11, and the voltage value V (potential difference) on both sides of the first switch 33A when the current flows through the power path 11.
  • a deterioration determination process is performed in which the resistance value R of the first switch 33A based on the current value A is compared with the resistance threshold Th1 to determine the degree of deterioration of the first switch 33A.
  • the notification function section 15C transmits information to an external device (not shown). In other words, the notification function section 15C of the control section 15 notifies the outside of the deteriorated state. In this way, the process shown in FIG. 2 ends.
  • the control unit 15 determines the degree of deterioration of the first switch 33A by comparing the resistance value R, which gradually increases as the number of times the switch is switched to the on state increases, with the resistance threshold value Th1.
  • the degree of increase in the resistance value R in the first switch 33A over time becomes larger, as shown by the straight line S1 shown in FIG. 3.
  • the frequency of large inrush current flowing through the first switch 33A is low
  • the degree of increase in the resistance value R in the first switch 33A over time becomes smaller as shown by the straight line S2.
  • the disconnection device 1 of the present disclosure determines the degree of deterioration of the first switch 33A by taking into account the state of the contacts of the first switch 33A, so it is possible to improve the durability performance of the first switch 33A. It can be operated with.
  • the disconnection device 1 includes a first switch 33A that switches the power path 11, which is a path for transmitting electric power from the power supply unit 10, between a conductive state and a disconnected state.
  • the shutoff device 1 includes a control unit 15 that executes a deterioration determination process that compares the resistance value R of the first switch 33A with a resistance threshold Th1. When the magnitude of the resistance value R is greater than or equal to the resistance threshold Th1, the control unit 15 determines that the first switch 33A is in a degraded state, and notifies the outside that it is in the degraded state.
  • the resistance value R in the first switch 33A can be an index for estimating the state of the first switch 33A. For this reason, it is possible to determine whether or not the first switch 33A is in a deteriorated state in accordance with the state of the first switch 33A itself, so it is easy to bring out the durability performance of the first switch 33A. Furthermore, since the structure is such that the deterioration state is notified to the outside, it is easy to take measures based on the state of the first switch 33A outside.
  • the deteriorated state refers to a state in which the first switch 33A has changed in quality compared to when it was initially installed in the disconnection device 1, and the performance of switching the power path 11 between the conductive state and the disconnected state has deteriorated.
  • the resistance value R is based on the potential difference on both sides of the first switch 33A when the first switch 33A is in the on state and current flows through the power path 11, and the current flowing through the power path 11. .
  • the resistance value R based on the potential difference on both sides of the first switch 33A and the current flowing through the power path 11 when the first switch 33A is in the on state and current flows through the power path 11 is the resistance value R.
  • the first switch 33A determines whether or not the first switch 33A is in a deteriorated state in accordance with the state of the first switch 33A itself, and it is possible to determine whether or not the first switch 33A is in a deteriorated state. It can be operated.
  • the disconnection device 1 further includes a second switch 33B that switches the power path 11 between a conductive state and a disconnected state.
  • This configuration is such that switching control is executed in which the first switch 33A is switched from the off state to the on state after the second switch 33B, so that energization of the power path 11 is started or the current increases.
  • the control unit 15 executes a deterioration determination process that compares the resistance value R when the switching control is executed and the resistance threshold Th1.
  • the power path 11 includes a high potential side power path 17 and a low potential side power path 20 having a lower potential than the high potential side power path 17.
  • a second switch 33B is provided on the high potential side power path 17, and a first switch 33A is provided on the low potential side power path 20.
  • it includes a resistor 33D and a third switch 33E connected in series to the resistor 33D, and the resistor 33D and the third switch 33E are connected in parallel to the first switch 33A. It has a parallel opening/closing path 33C.
  • the switching control is performed by turning the first switch 33A off and turning on the second switch 33B and the third switch 33E to start energizing the power path 11, and then switching the second switch 33B and the third switch 33E to the on state. This is control to switch the first switch 33A to the on state while maintaining the switch 33E in the on state.
  • the resistor 33D suppresses the peak of the current flowing through the third switch 33E from becoming too large. Current can flow through the power path 11.
  • the first switch 33A is switched to the on state while maintaining the second switch 33B and the third switch 33E in the on state, so the peak of the rush current flowing through the first switch 33A can be suppressed.
  • the control unit 15 detects the voltage between both terminals of the first switch 33A. According to this configuration, the resistance value R of the target first switch 33A can be detected more accurately.
  • the control unit 15 executes a deterioration determination process that compares the resistance value R when the magnitude of the current flowing in the power path 11 is equal to or greater than the current threshold value Th2 and the resistance threshold value Th1. Since the interrupting device 1 is configured to compare the current flowing through the power path 11 with the current threshold value Th2, it is possible to narrow down the state of the current used when detecting the resistance value R to a state appropriate for detecting the resistance value R, for example. Therefore, the reliability of the calculated resistance value R can be improved.
  • the voltage detection section may be connected to any location that can be considered to have the same potential as the terminals on both sides of the first switch.
  • the voltage detection unit 39 is installed at a position closer to the power supply side and a position closer to the load side than the position where the parallel switching path 33C is electrically connected to the low potential side power path 20. May be connected.
  • the notification function section may be configured as a display section such as a lamp or a display device, and may be configured to provide notification through display.
  • the notification function section may be configured to include an audio device such as a speaker, and may be configured to provide notification by audio.
  • the resistance value calculation section, the deterioration detection section, and the notification function section may each be configured as separate information processing devices (separate microcomputers, etc.).
  • the second switch may be provided on the low potential side power path, and the first switch may be provided on the high potential side power path.
  • the parallel switching path is also provided in the high potential side power path.
  • control unit and the control device may be configured as one microcomputer.
  • the deterioration determination process may be performed after determining that the rate of increase in current in the power path is below a certain value.
  • A1 is the current value A1 detected this time by the current detection section
  • A2 is the current value A2 detected last time by the current detection section
  • ⁇ T is the period ⁇ T of time during which the current detection unit repeatedly detects the current value.
  • the current value A2 has a configuration that can be stored, for example, in the RAM of the control unit.
  • the amount of change Ki is a value obtained by dividing the absolute value of the difference between the current value A1 and the current value A2 by the period ⁇ T. For example, if the state in which the amount of change Ki is smaller than the threshold value stored in the storage unit of the control unit continues for a predetermined period of time, it is determined that the fluctuation in the current flowing in the power path has stabilized, and then the resistance value of the first switch may be calculated.
  • Embodiment 1 it may be configured without the third switch. In this case, execution of the switching control causes a current increase in which the value of the current flowing through the power path increases rapidly.
  • table data in which resistance values corresponding to current values and voltage values are determined may be stored in advance in the storage unit, and resistance values corresponding to current values and voltage values may be adopted from the table data. good.
  • table data in which the resistance value of the switch corresponding to the number of times of opening and closing of the switch is determined is stored in advance in the storage unit, and the resistance value corresponding to the number of times of opening and closing of the switch is adopted from the table data.
  • a configuration may also be used.
  • the maximum value of inrush current in a switch is considered to decrease as the resistance value of the switch increases. Therefore, unlike the first embodiment, table data in which the resistance value of the switch corresponding to the maximum value of the inrush current in the switch is determined is stored in advance in the storage unit, and the inrush current in the switch is determined from the table data. A configuration may be adopted in which a resistance value corresponding to the maximum value is adopted.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Keying Circuit Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Static Devices (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
PCT/JP2022/027379 2022-07-12 2022-07-12 車両用の遮断装置 Ceased WO2024013842A1 (ja)

Priority Applications (9)

Application Number Priority Date Filing Date Title
CN202280097968.3A CN119487598A (zh) 2022-07-12 2022-07-12 车辆用的切断装置
DE112022007517.1T DE112022007517T5 (de) 2022-07-12 2022-07-12 Fahrzeug-unterbrechungseinrichtung
US18/992,465 US20260011999A1 (en) 2022-07-12 2022-07-12 Vehicle cutoff device
JP2024533360A JP7779391B2 (ja) 2022-07-12 2022-07-12 車両用の遮断装置
PCT/JP2022/027379 WO2024013842A1 (ja) 2022-07-12 2022-07-12 車両用の遮断装置
PCT/JP2023/014615 WO2024014072A1 (ja) 2022-07-12 2023-04-10 劣化判定装置
US18/881,518 US20250370046A1 (en) 2022-07-12 2023-04-10 Degradation determination device
JP2024533513A JP7769924B2 (ja) 2022-07-12 2023-04-10 劣化判定装置
CN202380051702.XA CN119487600A (zh) 2022-07-12 2023-04-10 劣化判定装置

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JP2019029236A (ja) * 2017-08-01 2019-02-21 株式会社豊田自動織機 電池パック
JP2019174165A (ja) * 2018-03-27 2019-10-10 日立オートモティブシステムズ株式会社 電池監視装置および継電器状態の診断方法
JP2021069229A (ja) * 2019-10-25 2021-04-30 プライムアースＥｖエナジー株式会社 二次電池システム

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JP4488921B2 (ja) 2005-02-07 2010-06-23 三洋電機株式会社 車両用の電源装置と電源装置の溶着検出方法
JP2013188088A (ja) 2012-03-09 2013-09-19 Toyota Motor Corp 車載用の電源装置
JP7120072B2 (ja) 2019-02-22 2022-08-17 株式会社デンソー プリチャージ制御装置
KR102944987B1 (ko) 2020-06-25 2026-03-30 현대자동차주식회사 차량 및 그 제어 방법

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JP2019029236A (ja) * 2017-08-01 2019-02-21 株式会社豊田自動織機 電池パック
JP2019174165A (ja) * 2018-03-27 2019-10-10 日立オートモティブシステムズ株式会社 電池監視装置および継電器状態の診断方法
JP2021069229A (ja) * 2019-10-25 2021-04-30 プライムアースＥｖエナジー株式会社 二次電池システム

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US20260011999A1 (en) 2026-01-08
JP7779391B2 (ja) 2025-12-03
JP7769924B2 (ja) 2025-11-14
JPWO2024013842A1 (https=) 2024-01-18
WO2024014072A1 (ja) 2024-01-18
DE112022007517T5 (de) 2025-05-15
JPWO2024014072A1 (https=) 2024-01-18
US20250370046A1 (en) 2025-12-04
CN119487600A (zh) 2025-02-18

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