WO2021166750A1 - Système d'alimentation électrique - Google Patents

Système d'alimentation électrique Download PDF

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Publication number
WO2021166750A1
WO2021166750A1 PCT/JP2021/004863 JP2021004863W WO2021166750A1 WO 2021166750 A1 WO2021166750 A1 WO 2021166750A1 JP 2021004863 W JP2021004863 W JP 2021004863W WO 2021166750 A1 WO2021166750 A1 WO 2021166750A1
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WIPO (PCT)
Prior art keywords
conductive path
power
power supply
unit
supply circuit
Prior art date
Application number
PCT/JP2021/004863
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English (en)
Japanese (ja)
Inventor
将義 廣田
Original Assignee
株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
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Application filed by 株式会社オートネットワーク技術研究所, 住友電装株式会社, 住友電気工業株式会社 filed Critical 株式会社オートネットワーク技術研究所
Publication of WO2021166750A1 publication Critical patent/WO2021166750A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Definitions

  • This disclosure relates to a power supply system.
  • PHEV Plug-in Hybrid Electric Vehicle
  • EVs Electric Vehicles
  • Patent Document 1 discloses an example of a power supply system mounted on this type of electric vehicle.
  • the auxiliary load 90 and the auxiliary battery 70 are electrically connected to the power supply wiring 155p, and both the main DC / DC converter 60 and the sub DC / DC converter 115 are power supplies. Power can be supplied to the wiring 155p.
  • the auxiliary battery 70, the main DC / DC converter 60, the sub DC / DC converter 115, and the auxiliary machine load 90 It becomes impossible to supply power. Even if a plurality of loads are connected to the power supply wiring 155p, if a ground fault or the like occurs in the power supply wiring 155p, the power supply to all of these loads may be stopped.
  • the present disclosure provides a power supply system capable of suppressing the inability to supply electric power to any of a plurality of loads.
  • the power supply system which is one of the disclosures, is Conduction between the first conductive path, which is a path for supplying electric power to the first load, the second conductive path, which is a path for supplying electric power to the second load, and the first conductive path and the second conductive path.
  • a power supply system used in an in-vehicle system including a relay unit that switches between an off state that shuts off the power and an on state that allows the power supply, a relay control device that controls the relay unit, and a control unit.
  • a power supply unit including a first supply circuit that supplies electric power based on the electric power from the first power storage unit and a second supply circuit that supplies electric power is provided.
  • the first supply circuit includes a first power conversion circuit and is electrically connected to at least the first conductive path without or through the relay section.
  • the second supply circuit includes a second power conversion circuit and is electrically connected to at least the second conductive path without or through the relay section.
  • the power supply system which is one of the present disclosures, can suppress the inability to supply electric power to any of a plurality of loads.
  • FIG. 1 is a block diagram schematically illustrating an in-vehicle system including the power supply system according to the first embodiment of the present disclosure.
  • FIG. 2 is a schematic diagram schematically illustrating a vehicle equipped with the in-vehicle system of FIG.
  • FIG. 3 is a circuit diagram illustrating a specific configuration of the first supply circuit in the power supply system of FIG.
  • FIG. 4 is an explanatory diagram illustrating an example of operation during external charging in the power supply system of FIG.
  • FIG. 5 is an explanatory diagram illustrating an example of operation in a normal state when the vehicle is running in the power supply system of FIG.
  • FIG. 6 is an explanatory diagram illustrating an example of operation after an abnormality occurs on the second conductive path side when the vehicle is traveling in the power supply system of FIG. 1.
  • FIG. 1 is a block diagram schematically illustrating an in-vehicle system including the power supply system according to the first embodiment of the present disclosure.
  • FIG. 2 is a schematic diagram schematically illustrating a vehicle
  • FIG. 7 is an explanatory diagram illustrating an example of operation after an abnormality occurs on the first conductive path side when the vehicle is traveling in the power supply system of FIG.
  • FIG. 8 is a block diagram schematically illustrating an in-vehicle system including the power supply system according to the second embodiment of the present disclosure.
  • FIG. 9 is a block diagram schematically illustrating an in-vehicle system including the power supply system according to the third embodiment of the present disclosure.
  • FIG. 10 is a block diagram schematically illustrating an in-vehicle system including the power supply system according to the fourth embodiment of the present disclosure.
  • a first conductive path which is a path for supplying electric power to a first load
  • a second conductive path which is a path for supplying electric power to a second load
  • the first conductive path and the second conductive path are connected to an in-vehicle system
  • a power supply unit including a first supply circuit that supplies power based on power from a power storage unit and a second supply circuit that supplies power is provided, and the first supply circuit includes a first power conversion circuit.
  • the second supply circuit includes a second power conversion circuit and does not include the relay section.
  • the power supply unit is electrically connected to at least the second conductive path via the relay unit, and the power supply unit is said to be in the case where the first control is performed by the control unit when the relay unit is in the off state.
  • the first operation of supplying power only to the first conductive path among the first conductive path and the second conductive path was performed, and the second control was performed by the control section when the relay section was in the off state.
  • a power supply system that performs a second operation of supplying electric power only to the second conductive path among the first conductive path and the second conductive path.
  • a relay unit establishes a conduction state between the first conductive path, which is a path for supplying electric power to the first load, and the second conductive path, which is a path for supplying electric power to the second load. It can be applied to an in-vehicle system that switches to a cut-off state. Then, in the power supply system, when the first control is performed by the control unit when the relay unit is off, the power supply unit configured to be able to convert power is electrically disconnected from the second conductive path. Electric power can be individually supplied to the first conductive path.
  • the power supply unit configured to be able to convert power is electrically separated from the first conductive path. Can be individually powered against. Therefore, the power supply system can suppress the inability to supply electric power to any of the plurality of loads.
  • the first control and the second control performed by the control unit may be different controls or may be the same control.
  • the power supply unit is the first supply of the first supply circuit and the second supply circuit when the first control is performed by the control unit when the relay unit is in the off state.
  • the first supply circuit is described when the first operation is performed so as to supply electric power to the first conductive path only by the circuit, and the second control is performed by the control unit when the relay unit is in the off state.
  • the power supply system of the above [2] performs an operation of supplying electric power to the first conductive path when the first control is performed by the control unit when the relay unit is in the off state among the first supply circuit and the second supply circuit. It is possible to selectively supply electric power in a form in which the operating region is suppressed by causing only the first supply circuit of the above. Further, in the power supply system, the operation of supplying electric power to the second conductive path when the second control is performed by the control unit when the relay unit is off is performed by the first of the first supply circuit and the second supply circuit. 2 Only the supply circuit can be used to selectively supply power in a form that suppresses the operating area.
  • the relay control device includes a first abnormality detecting unit that detects an abnormality on the first conductive path side and a second abnormality detecting unit that detects an abnormality on the second conductive path side, and the relay control device includes the first abnormality.
  • the detection unit detects an abnormality on the first conductive path side
  • the relay unit is switched to the off state
  • the second abnormality detection unit detects an abnormality on the second conductive path side
  • the relay unit is turned off.
  • the power supply system according to [1] or [2] that switches to a state.
  • the relay control device is used in both cases where the first abnormality detecting unit detects an abnormality on the first conductive path side and the second abnormality detecting unit detects an abnormality on the second conductive path side. Can switch the relay section to the off state. Therefore, the power supply system can protect the first conductive path and the second conductive path, which are not abnormal, by electrically disconnecting them from the abnormal occurrence side.
  • the off state includes a first off state and a second off state, and when the relay portion is in the first off state, the relay portion includes the first conductive path and the second off state.
  • the first supply circuit and the second supply circuit allow power to be supplied from the first supply circuit and the second supply circuit to the first conductive path, and the first supply circuit and the second supply circuit to the first supply circuit. 2
  • the relay section cuts off the conduction between the first conductive path and the second conductive path.
  • the power supply from the first supply circuit and the second supply circuit to the second relay path is allowed, and the power supply from the first supply circuit and the second supply circuit to the first relay path is cut off.
  • the power supply unit is the first supply circuit and the first supply circuit when the control unit controls the operation of the first supply circuit and the second supply circuit when the relay unit is in the first off state. Control to supply power to the first conductive path by the second supply circuit and to operate the first supply circuit and the second supply circuit by the control unit when the relay unit is in the second off state.
  • the power supply system according to [1], wherein when the power is supplied to the second conductive path by the first supply circuit and the second supply circuit.
  • the relay unit when the relay unit is in the first off state and the control unit controls the operation of the first supply circuit and the second supply circuit, power is supplied to the first conductive path.
  • the operation can be performed by both the first supply circuit and the second supply circuit.
  • the power supply system supplies electric power to the second conductive path when the control unit controls the operation of the first supply circuit and the second supply circuit when the relay unit is in the second off state.
  • the operation can be performed by both the first supply circuit and the second supply circuit.
  • a first abnormality detection unit that detects an abnormality on the first conductive path side
  • the relay control device includes a second abnormality detecting unit for detecting an abnormality on the second conductive path side, and the relay control device uses the relay unit when the first abnormality detecting unit detects an abnormality on the first conductive path side.
  • the relay control device when the first abnormality detecting unit detects an abnormality on the first conductive path side, the relay control device can switch the relay unit to the second off state. That is, the power supply system cuts off the conduction between the first conductive path and the second conductive path when an abnormality occurs on the first conductive path side, and the first supply circuit and the second supply circuit to the second conductive path.
  • the power supply to the road can be allowed, and the power supply from the first supply circuit and the second supply circuit to the first conductive path can be cut off.
  • the relay control device when the second abnormality detecting unit detects an abnormality on the second conductive path side, the relay control device can switch the relay unit to the first off state.
  • the power supply system cuts off the conduction between the first conductive path and the second conductive path when an abnormality occurs on the second conductive path side, and the first supply circuit and the second supply circuit to the first conductive path.
  • the power supply to the road can be allowed, and the power supply from the first supply circuit and the second supply circuit to the second conductive path can be cut off.
  • the control unit includes a first abnormality detection unit that detects an abnormality on the first conductive path side and a second abnormality detection unit that detects an abnormality on the second conductive path side, and the control unit detects the first abnormality. From [1], the second control is performed when the unit detects an abnormality on the first conductive path side, and the first control is performed when the second abnormality detecting unit detects an abnormality on the second conductive path side.
  • the power supply system according to any one of [5].
  • the control unit since the control unit performs the second control when the first abnormality detection unit detects an abnormality on the first conductive path side, the second is different from the abnormality generating side (first conductive path side). Power can be selectively supplied to the conductive path. Further, in the power supply system, when the second abnormality detecting unit detects an abnormality on the second conductive path side, the control unit performs the first control, so that the first conductive path different from the abnormality generating side (second conductive path side). Can be selectively supplied with power.
  • the control unit includes the first supply circuit and the second supply circuit when the first condition is satisfied when the first abnormality detection unit detects an abnormality on the first conductive path side.
  • the first condition is not satisfied when the supply circuit is controlled to supply power to the second conductive path and the first abnormality detecting unit detects an abnormality on the first conductive path side.
  • the second condition is when either the supply circuit or the second supply circuit is controlled to supply power to the second conductive path and the second abnormality detecting unit detects an abnormality on the second conductive path side.
  • the first supply circuit and the second supply circuit are controlled to supply power to the first conductive path, and the second abnormality detecting unit detects an abnormality on the second conductive path side.
  • the power supply system according to [5], wherein when the second condition is not satisfied, control is performed to supply power to the first conductive path to either the first supply circuit or the second supply circuit.
  • the power supply system of the above [7] is an operation of supplying electric power to the second conductive path by both the first supply circuit and the second supply circuit when the first abnormality detection unit detects an abnormality on the first conductive path side.
  • the operation of supplying electric power to the second conductive path depending on one of them can be used properly according to the conditions.
  • both the first supply circuit and the second supply circuit supply electric power to the first conductive path, and one of them supplies power to the first conductive path. It is possible to properly use the operation of supplying power to the power supply according to the conditions.
  • the first condition and the second condition may be the same condition or different conditions.
  • the first condition and the second condition may be a condition that the electric power supplied from the power supply unit to the first conductive path or the second conductive path exceeds a predetermined value.
  • the first power conversion circuit performs a first power conversion operation based on the power supplied from the first power storage unit, and in the first supply circuit, the first power conversion circuit performs the first power conversion operation. Power is supplied to at least the first conductive path based on the conversion operation, and the second power conversion circuit performs the second power conversion operation based on the power supplied from the first power storage unit.
  • the second supply circuit is described in any one of [1] to [7] for supplying power to at least the second conductive path based on the second power conversion circuit performing the second power conversion operation. Power system.
  • the first supply circuit performs power conversion and individually supplies power to the first conductive path
  • the second supply circuit performs power conversion to the second conductive path.
  • the operation of individually supplying electric power can be performed based on the electric power from the common first power storage unit.
  • the first supply circuit includes a power converter that performs power conversion based on power from a power source different from that of the first power storage unit and supplies power to the first power storage unit.
  • the power supply system according to any one of [1] to [8], which includes a part of a converter.
  • the power converter can perform an operation of performing power conversion based on the power from a power source different from that of the first power storage unit and supplying power to the first power storage unit. Then, the power supply system can perform an operation of supplying electric power to the first conductive path by utilizing a part of the functions of the power converter. That is, the power supply system can share some functions for both operations, and can realize both operations with a smaller configuration.
  • the power converter can perform an operation of performing power conversion based on the power from the first power storage unit and supplying power to the external load. Then, the power supply system can perform an operation of supplying electric power to the first conductive path by utilizing a part of the functions of the power converter. That is, the power supply system can share some functions for both operations, and can realize both operations with a smaller configuration.
  • the power converter includes a transformer and a converter connected to the secondary side of the transformer, and the converter converts the power output from the secondary side of the transformer to convert the power output from the secondary side of the transformer.
  • the power supply system according to [9], which supplies a storage battery.
  • the power supply system of the above [11] makes it easy to supply a voltage suitable for charging the first power storage unit to the first power storage unit.
  • the first supply circuit includes a transformer and a rectifier circuit connected to the secondary side of the transformer, and the rectifier circuit rectifies the power output from the secondary side of the transformer.
  • the power supply system according to any one of [9] to [11], which supplies at least one of the first conductive path and the second conductive path.
  • the power supply system of the above [12] can supply a desired voltage to at least one of the first conductive path and the second conductive path.
  • the power converter includes a transformer and a converter connected to the secondary side of the transformer, the converter is a bidirectional converter, and the bidirectional converter is from the secondary side of the transformer.
  • a first conversion operation that converts the input power and outputs it to the first storage unit, and a second conversion operation that converts the power input from the first storage unit and outputs it to the secondary side of the transformer.
  • the first supply circuit supplies power to at least one of the first conductive path and the second conductive path based on the power output by the second conversion operation [11] or [12].
  • the configuration is such that it is easy to perform an operation of supplying an appropriate voltage to the first power storage unit.
  • the first conductive path is a conductive path to which the first battery is electrically connected
  • the second conductive path is a conductive path to which the second battery is electrically connected.
  • electric power is supplied to the first battery and the first load via the first conductive path, and electric power can be supplied to the second battery and the second load via the second conductive path. It can be suitably used for a system.
  • the vehicle described in [14] above is a vehicle that can suppress the inability to supply electric power to any of a plurality of loads.
  • FIG. 1 shows the power supply system 100 according to the first embodiment of the present disclosure.
  • the power supply system 100 is configured as a power supply system for vehicles. As shown in FIG. 2, the power supply system 100 is used as a part of the in-vehicle system 3 mounted on the vehicle 1.
  • the vehicle 1 is a vehicle equipped with a power supply system 100, and is, for example, a vehicle such as a PHEV or an EV.
  • the in-vehicle system 3 includes a power supply system 100, a first automatic driving load 196A, a first auxiliary machine system load 194A, a second automatic driving load 196B, a second auxiliary machine system load 194B, a drive unit 192, and the like. including.
  • the power supply system 100 includes a first conductive path 11, a second conductive path 12, a relay section 52, a power supply section 20, and a control section 110. Further, the power supply system 100 includes a high-voltage battery 106, a first low-voltage battery 108A, a second low-voltage battery 108B, an MG-ECU 116, a PCU 118, a relay 160, a relay 162, and the like. The relays 160 and 162 may be arranged in the charger 102.
  • the power supply system 100 charges the high-voltage battery 106, the first low-voltage battery 108A, and the second low-voltage battery 108B based on the AC power supplied from the AC power supply 190 when the AC power supply 190 is connected to the vehicle 1. It is a possible system.
  • the power supply system 100 is also a system that supplies electric power to the drive unit 192, the first auxiliary machine load 194A, the first automatic driving load 196A, the second auxiliary machine system load 194B, and the second automatic driving load 196B when the vehicle is running. ..
  • the drive unit 192 is an electric drive device such as a main engine motor.
  • the drive unit 192 is a device that gives a driving force for rotating the wheels of the vehicle 1 based on the electric power supplied from the high-voltage battery 106.
  • the first auxiliary machine system load 194A corresponds to an example of the first load.
  • the second auxiliary machine system load 194B corresponds to an example of the second load.
  • the first auxiliary machine load 194A and the second auxiliary machine system load 194B are accessory devices necessary for operating the engine and the motor.
  • the accessory equipment is mainly a starter motor, an alternator, a radiator cooling fan, and the like.
  • the first auxiliary machine system load 194A and the second auxiliary machine system load 194B may include an electric power steering system, an electric parking brake, lighting, a wiper drive unit, a navigation device, and the like.
  • the second auxiliary machine system load 194B is a load capable of executing a part or all of the functions of the first auxiliary machine system load 194A when the function of the first auxiliary machine system load 194A is stopped.
  • the first auxiliary machine system load 194A is a load capable of executing a part or all of the functions of the second auxiliary machine system load 194B when the function of the second auxiliary machine system load 194B is stopped.
  • the first automatic operating load 196A corresponds to an example of the first load.
  • the second automatic operation load 196B corresponds to an example of the second load.
  • the first automatic operation load 196A and the second automatic operation load 196B are loads required for automatic operation. Examples of the first automatic driving load 196A and the second automatic driving load 196B include sensing systems such as millimeter-wave radars and stereo cameras, speed control systems, inter-vehicle distance control systems, steering control systems, and lane departure prevention support systems. ..
  • the second automatic driving load 196B is a load capable of executing a part or all of the functions of the first automatic driving load 196A when the function of the first automatic driving load 196A is stopped.
  • the first automatic driving load 196A is a load capable of executing a part or all of the functions of the second automatic driving load 196B when the function of the second automatic driving load 196B is stopped.
  • the first automatic operation load 196A and the first auxiliary machine system load 194A are distinguished, but they do not have to be distinguished.
  • the first auxiliary machine load 194A may have a load belonging to the first automatic operation load 196A
  • the first automatic operation load 196A may have a load belonging to the first auxiliary machine load 194A.
  • the second automatic operation load 196B and the second auxiliary machine system load 194B may not be distinguished.
  • the second auxiliary machine system load 194B may have a load belonging to the second automatic operation load 196B
  • the second automatic operation load 196B may have a load belonging to the second auxiliary machine system load 194B.
  • the state in which the vehicle is running includes the state in which the vehicle is moving, but is not limited to the state in which the vehicle is moving.
  • the vehicle is running it includes the state where the vehicle moves when the accelerator is stepped on.
  • the vehicle is running it includes a state in which the vehicle is not moving and is stopped while supplying power to a load such as lighting. If it is a PHEV, it also includes the idling state of the engine when the vehicle is running.
  • the high-voltage battery 106 corresponds to an example of the first power storage unit.
  • the high voltage battery 106 outputs a high voltage (for example, about 300 V) to drive the drive unit 192.
  • the output voltage when the high-voltage battery 106 is fully charged is higher than the output voltage when the first low-voltage battery 108A is fully charged, and is higher than the output voltage when the second low-voltage battery 108B is fully charged.
  • the first conductive path 11 is a path for supplying electric power to the first auxiliary machine system load 194A and the first automatic operation load 196A, which correspond to an example of the first load. Although a specific connection configuration is omitted in FIG. 1, the first conductive path 11 is electrically connected to the first auxiliary machine system load 194A, the first automatic operation load 196A, and the first low-voltage battery 108A. ..
  • the first conductive path 11 includes a conductive path 11A electrically connected to the positive electrode of the first low-voltage battery 108A and a conductive path 11B electrically connected to the negative electrode of the first low-voltage battery 108A.
  • the first low-voltage battery 108A applies an output voltage between the conductive paths 11A and 11B of the first conductive path 11 to supply electric power to the first auxiliary machine system load 194A and the first automatic operation load 196A.
  • the second conductive path 12 is a path for supplying electric power to the second auxiliary machine system load 194B and the second automatic operation load 196B, which correspond to an example of the second load. Although a specific connection configuration is omitted in FIG. 1, the second conductive path 12 is electrically connected to the second auxiliary machine system load 194B, the second automatic operation load 196B, and the second low-voltage battery 108B. ..
  • the second conductive path 12 includes a conductive path 12A electrically connected to the positive electrode of the second low-voltage battery 108B and a conductive path 12B electrically connected to the negative electrode of the second low-voltage battery 108B.
  • the second low-voltage battery 108B applies an output voltage between the conductive paths 12A and 12B of the second conductive path 12, and supplies electric power to the second auxiliary machine system load 194B and the second automatic operation load 196B.
  • the first low voltage battery 108A corresponds to an example of the first battery.
  • the first low voltage battery 108A may be composed of a lead storage battery or another type of storage battery.
  • the first low voltage battery 108A applies a predetermined voltage (for example, 12V) to the first conductive path 11 when fully charged.
  • the second low voltage battery 108B corresponds to an example of the second battery.
  • the second low voltage battery 108B may be composed of a lead storage battery or another type of storage battery.
  • the second low voltage battery 108B applies a predetermined voltage (for example, 12V) to the second conductive path 12 when fully charged.
  • the control unit 110 is a device that performs various controls on the devices in the in-vehicle system 3.
  • the control unit 110 corresponds to an example of a relay control device.
  • the HV-ECU 114 can function as a relay control device.
  • the control unit 110 has a first control device 112 and a second control device 114.
  • the first control device 112 is also referred to as PLG-ECU 112.
  • the second control device 114 is also referred to as an HV-ECU 114.
  • the third control device 116 is also referred to as MG-ECU 116.
  • the PLG-ECU 112 (first control device 112) controls elements related to external charging.
  • the external charging is charging of the high-voltage battery 106, the first low-voltage battery 108A, and the second low-voltage battery 108B using an external AC power source as a power source.
  • the PLG-ECU 112 supplies electric power for operating an element (for example, a semiconductor element) constituting the charger 102 and the sub DC / DC converter 104.
  • the HV-ECU 114 (second control device 114) includes a high-pressure system load (drive unit 192) and a low-pressure system load (first auxiliary machine system load 194A, second auxiliary machine system load 194B, first automatic operation load) when the vehicle is running. It controls the elements related to the power supply to 196A, the second automatic driving load 196B). Specifically, the HV-ECU 114 controls the main DC / DC converter 103 and the MG-ECU 116, and the electric power for operating the elements (for example, semiconductor elements) constituting the main DC / DC converter 103 and the MG-ECU 116. To supply. Further, the HV-ECU 114 controls the sub-DC / DC converter 104 and supplies electric power for operating the elements (for example, semiconductor elements) constituting the sub-DC / DC converter 104.
  • the PCU (Power Control Unit) 118 converts the output power of the high-voltage battery 106 into the power for driving the drive unit 192 and supplies it to the drive unit 192.
  • the PCU 118 is provided with, for example, an inverter, generates alternating current (three-phase alternating current if the high-voltage battery 106 is driven by a three-phase current) from direct current, and supplies the alternating current to the drive unit 192.
  • the MG-ECU 116 controls the PCU 118 under the control of the HV-ECU 114.
  • the EV can run according to the configuration shown in FIG. If the vehicle on which the power supply system 100 is mounted is a PHEV, the vehicle is equipped with an engine in addition to the drive unit 192. Therefore, if the vehicle is a PHEV, the PHEV can travel by the cooperative operation of the engine and the drive unit 192.
  • the power supply unit 20 mainly includes a first supply circuit 21, a second supply circuit 22, relays 164, 166, 168, 170, and the like.
  • the first supply circuit 21 is a circuit that supplies electric power based on the electric power from the high-voltage battery 106.
  • the first supply circuit 21 includes a portion that functions as a charger 102 and a portion that functions as a sub DC / DC converter 104.
  • the charger 102 includes a first AC / DC converter 120, a first DC / AC converter 122, a capacitor 124, a second AC / DC converter 126, and a first transformer (transformer) 128.
  • the capacitor 124 is connected to the connection portion of the output end of the first AC / DC converter 120 and the input end of the first DC / AC converter 122.
  • the first transformer 128 is connected to the output end of the first DC / AC converter 122 and the input end of the second AC / DC converter 126.
  • FIG. 3 shows a specific circuit of the first supply circuit 21. Specifically, the detailed circuit configurations of the first AC / DC converter 120, the first DC / AC converter 122, the first rectifier circuit 130, and the second AC / DC converter 126 are shown in FIG.
  • the first AC / DC converter 120 functions as a power conversion circuit that converts input AC power into DC power and outputs it.
  • the first AC / DC converter 120 functions as a power factor improving circuit.
  • the first AC / DC converter 120 includes inductors 306, 308 and switch elements 310, 312, 314, 316 that form a full bridge circuit.
  • the switch elements 310, 312, 314, 316 are composed of FETs (Field Effect Transistors).
  • the two input ends of the full bridge circuit composed of the switch elements 310, 312, 314 and 316 are electrically connected to the inductors 306 and 308, respectively.
  • the two output ends of this full bridge circuit are electrically connected to both ends of the capacitor 124.
  • the first AC / DC converter 120 can generate a DC voltage from an AC voltage input to the terminal portion 350 from a commercial AC power supply or the like at the time of external charging and supply it to both ends of the capacitor 124.
  • the charger 102 may be a bidirectional power conversion device that generates an AC voltage from a direct current so as to return the power to the system or output the power as an emergency power source.
  • the first DC / AC converter 122 functions as a power conversion circuit that converts input DC power into AC power and outputs it.
  • the first DC / AC converter 122 functions as an inverter.
  • the first DC / AC converter 122 includes switch elements 320, 322, 324, 326 and an inductor 328 that form a full bridge circuit.
  • One terminal of the inductor 328 is electrically connected to one of the two output terminals of the full bridge circuit composed of the switch elements 320, 322, 324 and 326.
  • the other terminal of the inductor 328 is electrically connected to one terminal of the primary side end portion (both ends of the primary side winding) 132 of the first transformer 128.
  • the other of the two output terminals of the full bridge circuit composed of the switch elements 320, 322, 324 and 326 is electrically connected to the other terminal of the primary side end 132.
  • the first DC / AC converter 122 converts the DC voltage input from the capacitor 124 side into an AC voltage and outputs it to the primary side end 132 of the first transformer 128.
  • the second AC / DC converter 126 functions as a power conversion circuit that converts the input AC power into DC power and outputs it.
  • the AC voltage input to the second AC / DC converter 126 is the AC output of the first DC / AC converter 122 to the primary side end 132 of the first transformer 128, so that the first transformer 128 has an AC output. It is an AC voltage generated at the secondary end 134 of 1.
  • each of the terminal portions 352, which is the output end of the second AC / DC converter 126 is connected to both ends of the high-voltage battery 106 via relays 164 and 166.
  • the second AC / DC converter 126 functions as a bidirectional AC / DC converter and has a function of bidirectionally converting AC power and DC power.
  • the second AC / DC converter 126 receives an output voltage (AC voltage) from the first secondary side end 134 of the first transformer 128, converts the AC voltage into a DC voltage and outputs the voltage, and outputs the high voltage battery 106.
  • the first operation can be performed so as to supply to.
  • the second AC / DC converter 126 converts the DC voltage into an AC voltage and outputs the DC voltage to the first secondary end 134 of the first transformer 128.
  • a second operation can be performed to supply.
  • the second AC / DC converter 126 performs the second operation
  • the second AC / DC converter 126, the first transformer 128, and the first rectifier circuit 130 function as the sub DC / DC converter 104.
  • the second AC / DC converter 126 includes switch elements 330, 332, 334, 336 and an inductor 338 that form a full bridge circuit.
  • One terminal of the inductor 338 is electrically connected to one of a pair of terminals (a pair of terminals not connected to the terminal portion 352) of a full bridge circuit composed of switch elements 330, 332, 334, 336. Has been done.
  • the other terminal of the inductor 338 is electrically connected to one terminal of the first secondary side end portion (both ends of the first secondary side winding) 134 of the first transformer 128.
  • the other of the pair of terminals (a pair of terminals not connected to the terminal portion 352) of the full bridge circuit composed of the switch elements 330, 332, 334, 336 is the other of the first secondary side end portion 134. It is electrically connected to the terminal of.
  • the second AC / DC converter 126 converts the AC voltage into a DC voltage and outputs the AC voltage to the terminal 352.
  • the second AC / DC converter 126 converts the DC voltage into an AC voltage and outputs the DC voltage to the first secondary end 134 of the first transformer 128.
  • the sub DC / DC converter 104 includes a first DC / AC converter 122, a first rectifier circuit 130, a first transformer 128, and a second AC / DC converter 126.
  • the first rectifier circuit 130 rectifies and smoothes the input AC voltage and outputs a DC voltage.
  • the AC voltage input to the first rectifier circuit 130 is the second secondary of the first transformer 128 by supplying the AC output of the first DC / AC converter 122 to the primary side end 132 of the first transformer 128. It is an AC voltage generated at the side end 136.
  • the AC voltage input to the first rectifier circuit 130 is the AC output of the second AC / DC converter 126 supplied to the first secondary end 134 of the first transformer 128, so that the AC output of the first transformer 128 is supplied. It is an AC voltage generated at the second secondary end portion 136.
  • the output ends (each of the terminal portions 354) of the first rectifier circuit 130 are electrically connected to the respective conductive paths 11A and 11B of the first conductive path 11.
  • the first rectifier circuit 130 includes switch elements 340 and 342, an inductor 344, and a capacitor 346.
  • the second secondary winding 362 connected to the input side (second secondary end 136) of the first rectifier circuit 130 is a center tap coil.
  • the first rectifier circuit 130 rectifies the AC voltage generated in the second secondary winding 362, smoothes it, and outputs it as a DC voltage from the terminal unit 354.
  • the first AC / DC converter 120, the capacitor 124, the first DC / AC converter 122, the first transformer 128, and the second AC / DC converter 126 constitute a DAB (Dual Active Bridge) type DC / DC converter. These circuits of the first supply circuit 21 function as the charger 102. Further, the second AC / DC converter 126, the first transformer 128, and the first rectifier circuit 130 constitute a DC / DC converter having a full bridge / center tap configuration. These circuits of the first supply circuit 21 function as a sub DC / DC converter 104.
  • the sub-DC / DC converter 104 functions as an example of the first power conversion circuit, and the first power conversion operation (converts the DC power supplied from the high-pressure battery 106 to obtain a second power based on the power supplied from the high-pressure battery 106). 1 The operation of outputting DC power to the conductive path 11) is performed. Specifically, the sub-DC / DC converter 104 operates so as to step down the DC voltage supplied from the high-voltage battery 106 and apply the DC voltage to the first conductive path 11. In this way, the first supply circuit 21 can supply power to at least the first conductive path 11 based on the sub DC / DC converter 104 performing the first power conversion operation.
  • the sub DC / DC converter 104 also functions to convert the DC power supplied from the first AC / DC converter 120 and output the DC power to the first conductive path 11.
  • the first DC / AC converter 122 and the second AC / DC converter 126 are components of the sub DC / DC converter 104 and are also components of the charger 102.
  • the second supply circuit 22 is a circuit that supplies electric power.
  • the second supply circuit 22 supplies electric power based on the electric power from the high-voltage battery 106 (first power storage unit).
  • the second supply circuit 22 includes a main DC / DC converter 103.
  • the main DC / DC converter 103 includes a second DC / AC converter 140, a second rectifier circuit 142, and a second transformer 144.
  • the second transformer 144 is connected to the output end of the second DC / AC converter 140 and the input end of the second rectifier circuit 142.
  • the second DC / AC converter 140 is configured in the same manner as the first DC / AC converter 122, converts the DC voltage applied to the input side terminal 146 into an AC voltage, and outputs the DC voltage from the output side terminal 148.
  • the second rectifier circuit 142 is configured in the same manner as the first rectifier circuit 130, rectifies and smoothes the input AC voltage (output of the second transformer 144), and outputs the DC voltage to the second conductive path 12.
  • the AC voltage input to the second rectifier circuit 142 is the AC voltage generated on the secondary side of the second transformer 144 by supplying the AC output of the second DC / AC converter 140 to the primary side of the second transformer 144. Is.
  • the main DC / DC converter 103 functions as an example of the second power conversion circuit, and performs a second power conversion operation based on the power supplied from the high-pressure battery 106 (converts the DC power supplied from the high-pressure battery 106 to obtain a second power conversion operation). 1 The operation of outputting DC power to the conductive path 11) is performed. Specifically, the main DC / DC converter 103 functions to step down the DC voltage applied from the high-voltage battery 106 and apply the DC voltage between the conductive paths 12A and 12B. In this way, the second supply circuit 22 supplies power to at least the second conductive path 12 based on the main DC / DC converter 103 (second power conversion circuit) performing the second power conversion operation.
  • the switching device 50 is a device that switches between conduction and interruption between the first conductive path 11 and the second conductive path 12.
  • the switching device 50 includes a relay unit 52 that switches between an off state that cuts off conduction between the first conductive path 11 and the second conductive path 12 and an allowed on state.
  • the relay unit 52 includes a relay 52A interposed between the conductive path 11A on the high potential side of the first conductive path 11 and the conductive path 12A on the high potential side of the second conductive path 12. Further, the relay unit 52 includes a relay 52B interposed between the low potential side conductive path 11B of the first conductive path 11 and the low potential side conductive path 12B of the second conductive path 12.
  • the relay unit 52 When the relay unit 52 is in the off state, the conduction between the first conductive path 11 and the second conductive path 12 is cut off, and power is not transmitted between the first conductive path 11 and the second conductive path 12. .. When the relay unit 52 is in the ON state, conduction between the first conductive path 11 and the second conductive path 12 is allowed, and electric power is transmitted between the first conductive path 11 and the second conductive path 12. ..
  • the control unit 110 corresponds to an example of a relay control device.
  • the control unit 110 has the relay unit 52 in an off state (a state in which conduction between the first conductive path 11 and the second conductive path 12 is cut off) and an on state (a state in which the first conductive path 11 and the second conductive path 12 are cut off). Switch to (a state that allows conduction between).
  • the control unit 110 corresponds to an example of a first abnormality detection unit that detects an abnormality on the first conductive path 11 side. Further, the control unit 110 corresponds to an example of a second abnormality detection unit that detects an abnormality on the second conductive path 12 side. Specifically, for example, the HV-ECU 114 can function as a first abnormality detection unit and a second abnormality detection unit. Although the voltage detection line is omitted in FIG. 1, the control unit 110 is for inputting the voltage detection line for inputting the voltage signal of the first conductive path 11 and the voltage signal of the second conductive path 12. Is connected to the voltage detection line of.
  • the control unit 110 can detect the voltage of the first conductive path 11 (that is, the voltage between the conductive paths 11A and 11B). Further, the control unit 110 can detect the voltage of the second conductive path 12 (that is, the voltage between the conductive paths 12A and 12B). For example, when the relay unit 52 is in the off state and the voltage between the conductive paths 11A and 11B of the first conductive path 11 is equal to or less than a predetermined value, the control unit 110 determines that the first conductive path 11 side is abnormal. do.
  • control unit 110 determines that the second conductive path 12 side is abnormal when the voltage between the conductive paths 12A and 12B of the second conductive path 12 is equal to or less than a predetermined value when the relay unit 52 is in the off state. do.
  • the predetermined value is larger than 0V, lower than the output voltage of the first low-voltage battery 108A when fully charged, and lower than the output voltage of the second low-voltage battery 108B when fully charged.
  • the following description is a description mainly with reference to FIG. 4, and is a description of the operation of the power supply system 100 at the time of external charging.
  • the power supply system 100 is not connected to the AC power supply 190, and the relays 160, 162, 164, 166, 168, 170, 172, 174, 52A, 52B of the power supply system 100 are all off. This is the "initial state" of the power supply system 100.
  • the power supply system 100 is connected to an AC power supply 190 such as a commercial power supply via a cable or the like (not shown).
  • an AC power supply 190 such as a commercial power supply via a cable or the like (not shown).
  • the relay 172 is turned on, and the power supply from the first low-voltage battery 108A and the second low-voltage battery 108B to the PLG-ECU 112 is started.
  • the connection between the AC power supply 190 and the power supply system 100 is detected, and the relay 172 is turned on by, for example, an ECU (not shown) separate from the PLG-ECU 112 and the HV-ECU 114.
  • the PLG-ECU 112 When the power supply from the first low-voltage battery 108A and the second low-voltage battery 108B to the PLG-ECU 112 is started in this way, the PLG-ECU 112 is activated, and the PLG-ECU 112 turns on the relays 160, 162, 164, and 166. do. Further, the PLG-ECU 112 turns on the relay unit 52 and turns on the relays 52A and 52B. At this time, the relays 168, 170, 174 remain off. Further, the PLG-ECU 112 supplies electric power to the charger 102 and the sub DC / DC converter 104 to operate the charger 102 and the sub DC / DC converter 104.
  • the charger 102 When the charger 102 operates, as described above, the AC voltage from the AC power supply 190 is converted into a high-voltage DC voltage (output voltage of the second AC / DC converter 126) and supplied to the high-voltage battery 106, and the high-voltage battery 106 It will be charged.
  • the charger 102 In the first transformer 128, if the voltage ratio between the primary side end 132 and the first secondary end 134 is appropriately set, the charger 102 has an appropriate charging voltage for the high voltage battery 106. Can be supplied.
  • the sub DC / DC converter 104 When the sub DC / DC converter 104 operates, the AC voltage from the AC power supply 190 is converted into a low-voltage DC voltage and supplied to the first low-voltage battery 108A and the second low-voltage battery 108B, and the first low-voltage battery 108A and the second low-voltage battery 108A are supplied. The battery 108B is charged. If the voltage ratio between the primary side end 132 and the secondary secondary end 136 is appropriately set in the first transformer 128, the sub DC / DC converter 104 can use the first low voltage battery 108A. And an appropriate charging voltage can be supplied to the second low voltage battery 108B. In FIG. 4, the direction of the operating current during external charging is conceptually indicated by a thick arrow.
  • the following description is mainly based on FIG. 5, and is a description of the operation when the power supply system 100 is in a normal state when the vehicle is running.
  • the normal state when the vehicle is running is a state in which the first abnormality detecting unit and the second abnormality detecting unit have not detected any abnormality of the first conductive path 11 and the second conductive path 12 when the vehicle is running.
  • the relay 174 shown in FIG. 5 is turned on, and the power from the first low-voltage battery 108A and the second low-voltage battery 108B to the HV-ECU 114 is turned on. Supply is started.
  • the detection of the operation of the ignition key or the wireless key and the on of the relay 174 are performed by, for example, an ECU (not shown) separate from the PLG-ECU 112 and the HV-ECU 114.
  • the HV-ECU 114 When the power supply from the first low-voltage battery 108A and the second low-voltage battery 108B to the HV-ECU 114 is started in this way, the HV-ECU 114 is activated, and the HV-ECU 114 turns on the relays 168 and 170. Further, the HV-ECU 114 turns on the relays 52A and 52B, and turns on the relay unit 52. At this time, the relays 160, 162, 164, 166, 172 remain off.
  • the HV-ECU 114 supplies electric power to the main DC / DC converter 103, MG-ECU 116 and PCU 118 to operate the main DC / DC converter 103, MG-ECU 116 and PCU 118.
  • the high-voltage DC power supplied from the high-voltage battery 106 is supplied to the PCU 118, converted into AC power by the PCU 118, and supplied to the drive unit 192. ..
  • the drive unit 192 starts operation.
  • the operation of the drive unit 192 is controlled by the MG-ECU 116 controlling the PCU 118.
  • the main DC / DC converter 103 when the main DC / DC converter 103 operates, the high-voltage DC power supplied from the high-voltage battery 106 to the main DC / DC converter 103 is converted into a low-voltage DC power as described above.
  • the DC power converted by the main DC / DC converter 103 in this way is used as an auxiliary machine load (first auxiliary machine load 194A, second auxiliary machine load 194B) and an automatic operation load via the second conductive path 12. It is supplied to (first automatic operation load 196A, second automatic operation load 196B).
  • the output voltage of the second rectifier circuit 142 is preferably a voltage value suitable for the auxiliary equipment system load and the automatic operation load.
  • the transformation ratio (voltage ratio between the primary side and the secondary side) of the second transformer 144 may be set to an appropriate value.
  • the voltage supplied from the high-voltage battery 106 is supplied to the PCU 118 and the main DC / DC converter 103 and converted to drive unit 192, auxiliary equipment load, and automatic operation, respectively. Supplied to the load.
  • the direction of the electric current in the normal state when the vehicle is running is conceptually indicated by a thick arrow.
  • the main DC / DC converter 103 will be in the state where the sub DC / DC converter 104 is not operating.
  • the load will increase.
  • the HV-ECU 114 turns on the relays 164 and 166, and the DC voltage from the high voltage battery 106 is supplied to the second AC / DC converter 126. Further, the HV-ECU 114 starts supplying power to the sub DC / DC converter 104 to operate the second AC / DC converter 126 and the first rectifier circuit 130.
  • the second AC / DC converter 126 converts the DC voltage input from the high-voltage battery 106 to the terminal portion 352 (FIG. 3) into an AC voltage and outputs it to the first secondary side end portion 134.
  • the first secondary side end 134 and the second secondary end 136 of the first transformer 128 function as the primary side and the secondary side of the transformer, respectively.
  • the interaction between the first secondary winding 360 and the second secondary winding 362 of the first transformer 128 causes a second.
  • An AC voltage is generated at the secondary end 136. Therefore, an AC voltage is supplied to the first rectifier circuit 130 from the second secondary end 136.
  • the AC voltage generated at the second secondary end 136 is converted into a DC voltage by the first rectifier circuit 130 and supplied to the first conductive path 11.
  • the DC voltage supplied to the first conductive path 11 in this way is the auxiliary machine load (first auxiliary machine load 194A, second auxiliary machine load 194B) automatic operation load (first auxiliary machine system load 194B) via the first conductive path 11. It is supplied to 1 automatic operation load 196A, 2nd automatic operation load 196B).
  • the direction of the current in the state where the sub-DC / DC converter 104 is operating in the normal state when the vehicle is running is conceptually shown by a thick broken arrow arrow.
  • the power supply system 100 can suppress an increase in the load of the main DC / DC converter 103 by such an operation. Therefore, it is possible to prevent the main DC / DC converter 103 from being overloaded and being damaged, and the life of the main DC / DC converter 103 being shortened.
  • the HV-ECU 114 in the control unit 110 monitors abnormalities in the first conductive path 11 and the second conductive path 12 when the vehicle is traveling.
  • the HV-ECU 114 switches the relay unit 52 to the off state when the voltage between the conductive paths 11A and 11B of the first conductive path 11 becomes equal to or less than a predetermined value when the vehicle is traveling. Further, the HV-ECU 114 switches the relay unit 52 to the off state even when the voltage between the conductive paths 12A and 12B of the second conductive path 12 becomes equal to or less than a predetermined value when the vehicle is traveling.
  • the HV-ECU 114 determines that the first conductive path 11 side is abnormal when the voltage between the conductive paths 11A and 11B of the first conductive path 11 is equal to or less than a predetermined value when the relay unit 52 is switched to the off state. do.
  • the HV-ECU 114 determines that the second conductive path 12 side is abnormal when the voltage between the conductive paths 12A and 12B of the second conductive path 12 is equal to or less than a predetermined value when the relay unit 52 is switched to the off state. do.
  • the HV-ECU 114 in the control unit 110 determines that the first conductive path 11 side is abnormal while the vehicle is running (that is, when the first abnormality detecting unit detects an abnormality in the first conductive path 11), the relay unit.
  • the second control is performed while keeping the 52 in the off state.
  • the second control is a control for causing the power supply unit 20 to perform an operation (second operation) of supplying electric power only to the second conductive path 12 of the first conductive path 11 and the second conductive path 12.
  • the HV-ECU 114 turns off the relay unit 52 when it determines that the second conductive path 12 side is abnormal while the vehicle is traveling (that is, when the second abnormality detecting unit detects an abnormality in the second conductive path 12).
  • the first control is performed while maintaining the above.
  • the first control is a control for causing the power supply unit 20 to perform an operation (first operation) of supplying electric power only to the first conductive path 11 of the first conductive path 11 and the second conductive path 12.
  • First control is performed on the power supply unit 20 so as to supply power to the power supply unit 20.
  • the power supply unit 20 supplies power only to the first conductive path 11 of the first conductive path 11 and the second conductive path 12.
  • the supply operation (first operation) is performed.
  • the operation of supplying electric power only to the first conductive path 11 of the first conductive path 11 and the second conductive path 12 is the first of the first supply circuit 21 and the second supply circuit 22. It is performed only by the supply circuit 21, specifically, by the sub DC / DC converter 104.
  • Second control is performed on the power supply unit 20 so as to supply power to the power supply unit 20.
  • the power supply unit 20 supplies power only to the second conductive path 12 of the first conductive path 11 and the second conductive path 12 when the second control is performed by the control unit 110 when the relay unit 52 is in the off state.
  • the supply operation (second operation) is performed.
  • the operation of supplying electric power only to the second conductive path 12 of the first conductive path 11 and the second conductive path 12 is the second of the first supply circuit 21 and the second supply circuit 22. It is performed only by the supply circuit 22, specifically, by the main DC / DC converter 103.
  • the power supply system 100 can switch between the conductive state and the cutoff state by the relay unit 52 between the first conductive path 11 which is the power path to the first load and the second conductive path 12 which is the power path to the second load. It can be applied to in-vehicle systems. Then, in the power supply system 100, when the first control is performed by the control unit 110 when the relay unit 52 is in the off state, the power supply unit 20 configured so as to be able to convert electric power is different from the second conductive path 12. Electric power can be individually supplied to the electrically separated first conductive path 11.
  • the power supply unit 20 configured to be able to convert power is electrically disconnected from the first conductive path 11. Electric power can be individually supplied to the second conductive path 12. Therefore, the power supply system 100 can suppress the inability to supply electric power to any of the plurality of loads.
  • the power supply system 100 of the first supply circuit 21 and the second supply circuit 22 performs an operation of supplying electric power to the first conductive path 11 when the first control is performed by the control unit 110 when the relay unit 52 is in the off state. Only one of the first supply circuits 21 can be used. Therefore, the power supply system 100 can selectively supply electric power to the first conductive path 11 in a form in which the operating region is suppressed. Further, the power supply system 100 performs an operation of supplying electric power to the second conductive path 12 when the second control is performed by the control unit 110 when the relay unit 52 is in the off state, in the first supply circuit 21 and the second supply circuit. Only the second supply circuit 22 of 22 may be used. Therefore, the power supply system 100 can selectively supply electric power to the second conductive path 12 in a form in which the operating region is suppressed.
  • the relay control device is used in both cases where the first abnormality detecting unit detects an abnormality on the first conductive path 11 side and the second abnormality detecting unit detects an abnormality on the second conductive path 12 side. Can switch the relay unit 52 to the off state. Therefore, the power supply system 100 can protect the first conductive path 11 and the second conductive path 12 by electrically disconnecting the non-abnormal conductive path from the abnormal occurrence side.
  • the control unit 110 when the first abnormality detecting unit detects an abnormality on the first conductive path 11 side, the control unit 110 performs the second control, so that the power system 100 is different from the abnormality generating side (first conductive path 11 side). 2 Electric power can be selectively supplied to the conductive path 12. Further, in the power supply system 100, when the second abnormality detecting unit detects an abnormality on the second conductive path 12 side, the control unit 110 performs the first control, so that the power supply system 100 is different from the abnormality generating side (second conductive path 12 side). Power can be selectively supplied to different first conductive paths 11.
  • the first supply circuit 21 supplies electric power to the first conductive path 11 while performing electric power conversion
  • the second supply circuit 22 supplies electric power to the second conductive path 12 while performing electric power conversion.
  • the operation may be based on the power from the common high pressure battery 106.
  • the charger 102 which corresponds to an example of the power converter, can perform power conversion based on the power from the AC power source 190, which is a power source different from the high-pressure battery 106, and perform an operation of supplying power to the high-pressure battery 106 side. can.
  • the first supply circuit 21 includes a part of the charger 102 (power converter), and uses a part of the functions of the charger 102 to supply electric power to the first conductive path 11.
  • the operation of supplying can be performed. That is, the power supply system 100 can share some functions for both operations, and can realize both operations with a smaller configuration.
  • the second AC / DC converter 126 is a common component of the charger 102 and the sub DC / DC converter 104. Therefore, the power supply system 100 is smaller, and when mounted on a vehicle, the space ratio in the vehicle can be further reduced.
  • the charger 102 includes a second AC / DC converter 126 (converter).
  • the second AC / DC converter 126 converts the electric power output from the first secondary side of the first transformer 128 (transformer) and supplies it to the high-voltage battery 106 (first power storage unit).
  • the power supply system 100 configured in this way facilitates supplying a voltage suitable for charging the high-voltage battery 106 to the high-voltage battery 106.
  • the first supply circuit 21 includes a first transformer 128 (transformer) and a first rectifier circuit 130 (rectifier circuit) connected to the secondary side of the first transformer 128.
  • the first rectifier circuit 130 rectifies the electric power output from the secondary side of the first transformer 128 and supplies it to at least one of the first conductive path 11 and the second conductive path 12.
  • the power supply system 100 configured in this way can supply a desired voltage to at least one of the first conductive path 11 and the second conductive path 12.
  • the charger 102 includes a first transformer 128 (transformer) and a second AC / DC converter 126 (converter) connected to the secondary side of the first transformer 128.
  • the second AC / DC converter 126 is a bidirectional converter.
  • the second AC / DC converter 126 performs the first conversion operation of converting the AC power input from the secondary side of the first transformer 128 and outputting the DC power to the high voltage battery 106. Further, the second AC / DC converter 126 performs a second conversion operation of converting the DC power input from the high-voltage battery 106 and outputting the AC power to the secondary side of the first transformer 128.
  • the first supply circuit 21 supplies power to at least one of the first conductive path 11 and the second conductive path 12 based on the AC power output by the second conversion operation.
  • a part of the functions of the first supply circuit 21 can be combined with the power supply to the high voltage battery 106 and the power supply to at least one of the first conductive path 11 and the second conductive path 12. .
  • the power supply system 100 can easily perform an operation of supplying a desired voltage to at least one of the first conductive path 11 and the second conductive path 12 and an operation of supplying an appropriate voltage to the high voltage battery 106. It becomes a composition.
  • electric power is supplied to the first low-voltage battery 108A and the first load via the first conductive path 11, and electric power is supplied to the second low-voltage battery 108B and the second load via the second conductive path 12. It can be suitably used for an in-vehicle system.
  • the vehicle 1 is a vehicle 1 that can suppress the inability to supply electric power to any of a plurality of loads.
  • FIG. 8 shows the power supply system 200 according to the second embodiment of the present disclosure.
  • the power supply system 200 is different from the power supply system 100 of the first embodiment only in that the switching device 250 is used instead of the switching device 50. That is, the hardware configuration of the power supply system 200 shown in FIG. 8 is the same as that of the power supply system 100 of the first embodiment except for the switching device 250.
  • the in-vehicle system 203 is a system in which the power supply system 100 is replaced with the power supply system 200 in the in-vehicle system 3 in FIGS. 1 and 2.
  • the power supply system 200 of the second embodiment performs "operation at the time of external charging” in the same manner as the power supply system 100 of the first embodiment.
  • the "operation during external charging” differs from the “operation during external charging” of the first embodiment except that the relay unit 252 is turned on instead of the relay unit 52 being turned on. It is the same.
  • the power supply system 200 of the second embodiment performs "operation in a normal state when the vehicle is running" in the same manner as the power supply system 100 of the first embodiment.
  • the "operation in the normal state during vehicle traveling” differs only in that the relay unit 252 is turned on instead of the relay unit 52 being turned on, and other than that, the "vehicle traveling" of the first embodiment is performed. It is the same as “the operation in the normal state at the time”.
  • the relay unit 252 is a device that switches between an off state that cuts off the conduction between the first conductive path 11 and the second conductive path 12 and an allowed on state.
  • the relay unit 252 includes relays 252A, 252B, 252C, and 252D.
  • the ON state of the relay unit 252 includes a state in which the relays 252A, 252B, 252C, and 252D are all turned on, and at least in this state, conduction between the first conductive path 11 and the second conductive path 12 is allowed.
  • One end of the relay 252A is electrically connected to one terminal of the first rectifier circuit 130, and the other end is electrically connected to the conductive path 11A on the high potential side of the first conductive path 11.
  • the relay 252A conducts one terminal of the first rectifier circuit 130 and the conductive path 11A when it is on, and conducts electricity between one terminal of the first rectifier circuit 130 and the conductive path 11A when it is off. Shut off.
  • One end of the relay 252B is electrically connected to one terminal of the first rectifier circuit 130, and the other end is electrically connected to the conductive path 12A on the high potential side of the second conductive path 12.
  • the relay 252B conducts one terminal of the first rectifier circuit 130 and the conductive path 12A when it is on, and conducts electricity between one terminal of the first rectifier circuit 130 and the conductive path 12A when it is off. Shut off.
  • One end of the relay 252C is electrically connected to one terminal of the second rectifier circuit 142, and the other end is electrically connected to the conductive path 11A on the high potential side of the first conductive path 11.
  • the relay 252C conducts one terminal of the second rectifier circuit 142 and the conductive path 11A when it is on, and conducts electricity between one terminal of the second rectifier circuit 142 and the conductive path 11A when it is off. Shut off.
  • One end of the relay 252D is electrically connected to one terminal of the second rectifier circuit 142, and the other end is electrically connected to the conductive path 12A on the high potential side of the second conductive path 12.
  • the relay 252D conducts one terminal of the second rectifier circuit 142 and the conductive path 12A when it is on, and conducts electricity between one terminal of the second rectifier circuit 142 and the conductive path 12A when it is off. Shut off.
  • the conductive path 11B, the conductive path 12B, the other terminal of the first rectifier circuit 130, and the other terminal of the second rectifier circuit 142 are all electrically connected to the ground.
  • the off state of the relay unit 252 includes a first off state and a second off state.
  • the first off state is a switching state in which the relay 252A and the relay 252C are turned on and the relay 252B and the relay 252D are turned off.
  • the relay unit 252 cuts off the conduction between the first conductive path 11 and the second conductive path 12. Further, the relay unit 252 allows power supply from the first supply circuit 21 and the second supply circuit 22 to the first conductive path 11 in the first off state, and allows the first supply circuit 21 and the second supply circuit 21 to supply electric power. The power supply from 22 to the second conductive path 12 is cut off.
  • the second off state is a switching state in which the relay 252B and the relay 252D are turned on and the relay 252A and the relay 252C are turned off.
  • the relay unit 252 cuts off the conduction between the first conductive path 11 and the second conductive path 12. Further, the relay unit 252 allows power supply from the first supply circuit 21 and the second supply circuit 22 to the second conductive path 12 in the second off state, and allows the first supply circuit 21 and the second supply circuit 22 to supply electric power. The power supply to the first conductive path 11 is cut off.
  • the off state of the relay unit 252 includes not only the first off state and the second off state, but also the third off state, the fourth off state, the fifth off state, and the sixth off state.
  • the third off state is a switching state in which the relay 252A is turned on and the relay 252B, the relay 252C, and the relay 252D are turned off.
  • the fourth off state is a switching state in which the relay 252B is turned on and the relay 252A, the relay 252C, and the relay 252D are turned off.
  • the fifth off state is a switching state in which the relay 252C is turned on and the relay 252A, the relay 252B, and the relay 252D are turned off.
  • the sixth off state is a switching state in which the relay 252D is turned on and the relay 252A, the relay 252B, and the relay 252C are turned off.
  • the "operation at the time of abnormality when the vehicle is running" in the power supply system 200 of the second embodiment is as follows.
  • the HV-ECU 114 in the control unit 110 determines whether or not the first conductive path 11 side is abnormal by the same method as the power supply system 100 of the first embodiment, and the same method as the power supply system 100 of the first embodiment. Determines whether or not the second conductive path 12 side is abnormal.
  • the control unit 110 corresponds to an example of the first abnormality detection unit and the second abnormality detection unit.
  • the HV-ECU 114 in the control unit 110 determines that the first conductive path 11 side is abnormal while the vehicle is running (that is, when the first abnormality detecting unit detects an abnormality in the first conductive path 11), the relay unit.
  • the second control may be performed by switching the 252 to the second off state.
  • the HV-ECU 114 may always perform control to switch to the second off state when it is determined that the first conductive path 11 side is abnormal, and may always perform when it is determined that the first conductive path 11 side is abnormal. It may be performed at the time of establishment (when the power consumption of the low-voltage system load is equal to or higher than a certain value, etc.).
  • the relay unit 252 When the relay unit 252 is switched to the second off state, the continuity between the first conductive path 11 and the second conductive path 12 is cut off. Then, in the second off state, power supply from the first supply circuit 21 and the second supply circuit 22 to the second conductive path 12 is permitted, and the first supply circuit 21 and the second supply circuit 22 to the first conductive path 11 The power supply to is cut off.
  • the HV-ECU 114 performs the second control when it is determined that the first conductive path 11 side is abnormal while the vehicle is traveling (that is, when the first abnormality detecting unit detects the abnormality of the first conductive path 11).
  • the power supply unit 20 performs an operation (second operation) of supplying power only to the second conductive path 12 of the first conductive path 11 and the second conductive path 12 when the relay unit 252 is in the off state. It is a control to be performed by. Specifically, as one of the second controls, "control for operating the first supply circuit 21 and the second supply circuit 22" is included. The “control for operating the first supply circuit 21 and the second supply circuit 22" may be performed whenever it is determined that the first conductive path 11 side is abnormal, and when a predetermined condition is satisfied (for example, a low voltage system). It may be performed when the power consumption of the load is equal to or higher than a certain value).
  • a predetermined condition for example, a low voltage system
  • control unit 110 controls to switch the relay unit 252 to the second off state and controls to operate the first supply circuit 21 and the second supply circuit 22, the first supply circuit 21 and the second supply circuit 22 become conductive paths. It operates so as to supply electric power only to the second conductive path 12 of 11 and 12.
  • the first is when the predetermined condition is not satisfied. Either the supply circuit 21 or the second supply circuit 22 may be operated. In this example, when only the first supply circuit 21 is the operation target, the relay unit 252 may be in the fourth off state. When only the second supply circuit 22 is the operation target, the relay unit 252 may be in the sixth off state.
  • the relay unit The 252 is switched to the first off state, and the first control is performed.
  • the HV-ECU 114 may always perform control to switch to the first off state when it is determined that the second conductive path 12 side is abnormal, and may always perform when it is determined that the second conductive path 12 side is abnormal. It may be performed at the time of establishment (when the power consumption of the low-voltage system load is equal to or higher than a certain value, etc.).
  • the relay unit 252 When the relay unit 252 is switched to the first off state, the continuity between the first conductive path 11 and the second conductive path 12 is cut off. Then, in the first off state, power supply from the first supply circuit 21 and the second supply circuit 22 to the first conductive path 11 is permitted, and the first supply circuit 21 and the second supply circuit 22 to the second conductive path 12 The power supply to is cut off.
  • the HV-ECU 114 performs the first control when it is determined that the second conductive path 12 side is abnormal while the vehicle is traveling (that is, when the second abnormality detecting unit detects the abnormality of the second conductive path 12).
  • the power supply unit 20 performs an operation (first operation) of supplying power only to the first conductive path 11 of the first conductive path 11 and the second conductive path 12 when the relay unit 252 is in the off state. It is a control to be performed by. Specifically, as one of the first controls, "control for operating the first supply circuit and the second supply circuit" is included.
  • the HV-ECU 114 may always perform "control to operate the first supply circuit 21 and the second supply circuit 22" when it is determined that the second conductive path 12 side is abnormal, and when a predetermined condition is satisfied (low voltage system). This may be performed when the power consumption of the load is equal to or higher than a certain value).
  • control unit 110 controls to switch the relay unit 252 to the first off state and controls to operate the first supply circuit 21 and the second supply circuit 22, the first supply circuit 21 and the second supply circuit 22 become conductive paths. Power is supplied only to the first conductive path 11 of 11 and 12.
  • control to operate the first supply circuit 21 and the second supply circuit 22 is performed when the predetermined condition is satisfied.
  • the first supply circuit 21 or the first supply circuit 21 or Control may be performed to operate any of the second supply circuits 22.
  • the relay unit 252 may be in the third off state.
  • the relay unit 252 may be in the fifth off state.
  • the relay control device when the first abnormality detecting unit detects an abnormality on the first conductive path 11 side, the relay control device can switch the relay unit 252 to the second off state. That is, the power supply system 200 allows power to be supplied from the first supply circuit 21 and the second supply circuit 22 to the second conductive path 12, and from the first supply circuit 21 and the second supply circuit 22 to the first conductive path 11. Power supply can be cut off. Further, when the second abnormality detecting unit detects an abnormality on the second conductive path 12 side, the relay control device can switch the relay unit 252 to the first off state.
  • the power supply system 200 allows power to be supplied from the first supply circuit 21 and the second supply circuit 22 to the first conductive path 11 when an abnormality occurs on the second conductive path 12 side, and the first supply circuit 200.
  • the power supply from the 21 and the second supply circuit 22 to the second conductive path 12 can be cut off.
  • the first operation of supplying electric power to the first conductive path 11 is performed. It can be performed by both the supply circuit 21 and the second supply circuit 22. Further, the power supply system 200 operates to supply electric power to the second conductive path 12 when the first supply circuit 21 and the second supply circuit 22 are controlled to operate when the relay unit 252 is in the second off state. It can be performed by both the first supply circuit 21 and the second supply circuit 22. Therefore, it is possible to prevent one of the supply circuits from becoming overloaded.
  • the control unit 110 is second to the first supply circuit 21 and the second supply circuit 22 when the first condition is satisfied when the first abnormality detection unit detects an abnormality on the first conductive path 11 side. Control may be performed to supply electric power to the conductive path. Then, when the first abnormality detecting unit detects an abnormality on the first conductive path 11 side and the first condition is not satisfied, the control unit 110 can use either the first supply circuit 21 or the second supply circuit 22. It is also possible to control the supply of electric power to the second conductive path 12 with respect to the chisel. In this example, the control unit 110 may set the relay unit 252 to the second off state when the first condition is satisfied when the first abnormality detecting unit detects an abnormality on the first conductive path 11 side. ..
  • control unit 110 may put the relay unit 252 in the second off state when the first condition is not satisfied when the first abnormality detecting unit detects the abnormality on the first conductive path 11 side.
  • the control unit 110 adds the second off state to the first supply circuit 21 and the second The relay between the circuit that stops the operation of the supply circuit 22 and the second conductive path 12 may be turned off.
  • control unit 110 first with respect to the first supply circuit 21 and the second supply circuit 22 when the second condition is satisfied when the second abnormality detection unit detects an abnormality on the second conductive path 12 side. Control may be performed to supply electric power to the conductive path 11. Further, the control unit 110 has only one of the first supply circuit 21 and the second supply circuit 22 when the second condition is not satisfied when the second abnormality detection unit detects an abnormality on the second conductive path 12 side. The first conductive path 11 may be controlled to supply electric power to the first conductive path 11. In this example, the control unit 110 may set the relay unit 252 to the first off state when the second condition is satisfied when the second abnormality detection unit detects an abnormality on the second conductive path 12 side. ..
  • control unit 110 may put the relay unit 252 in the first off state when the second condition is not satisfied when the second abnormality detecting unit detects the abnormality on the second conductive path 12 side.
  • the control unit 110 adds the first off state to the first supply circuit 21 and the second The relay between the circuit that stops the operation of the supply circuit 22 and the first conductive path 11 may be turned off.
  • the first condition and the second condition may be the same condition or different conditions. Either or both of the first condition and the second condition may be a condition that the electric power supplied from the power supply unit 20 to the first conductive path 11 or the second conductive path 12 exceeds a predetermined value. Alternatively, either or both of the first condition and the second condition may be a condition that the temperature of either the first supply circuit 21 and the second supply circuit 22 exceeds a predetermined temperature. Alternatively, either or both of the first condition and the second condition may be other conditions.
  • FIG. 9 shows the power supply system 300 according to the third embodiment of the present disclosure.
  • the power supply system 300 differs from the power supply system 100 of the first embodiment in that a power converter 102A is provided instead of the charger 102, and in addition to this point, the charger 102 and the relays 160 and 162 are added. ..
  • the power supply system 300 is the same as the power supply system 100 of the first embodiment except for these points.
  • the in-vehicle system 303 is a system in which the power supply system 100 is replaced with the power supply system 300 in the in-vehicle system 3 in FIGS. 1 and 2.
  • the power supply system 300 of the third embodiment performs "operation in a normal state when the vehicle is running" in the same manner as the power supply system 100 of the first embodiment.
  • the "operation in the normal state when the vehicle is running” is different only in that a part of the power converter 102A similar to the charger 102 is used instead of the configuration in which a part of the charger 102 is used. Is the same as the "operation in the normal state when the vehicle is running" in the first embodiment.
  • the power supply system 300 of the third embodiment performs "operation at the time of abnormality during vehicle running" in the same manner as the power supply system 100 of the first embodiment.
  • the "operation at the time of abnormality when the vehicle is running” is different only in that a part of the power converter 102A similar to the charger 102 is used instead of the configuration in which a part of the charger 102 is used. It is the same as the "operation at the time of abnormality when the vehicle is running" of the first embodiment.
  • an external load Ld of a general home appliance or the like is connected to the power converter 102A via an outlet or the like.
  • the external load Ld is a load that can be attached to and detached from the vehicle on which the power supply system 300 is mounted (the vehicle in which the power supply system 300 is mounted in place of the power supply system 100 in the vehicle 1 of FIG. 2).
  • the external load Ld is electrically connected to the power supply system 300 when attached to the vehicle via an outlet or the like, and specifically, is electrically connected to the power converter 102A.
  • An outlet, a cable, a relay, or the like may be interposed between the power converter 102A and the external load Ld, but these parts are not shown in FIG.
  • the power supply system 300 is similarly mounted on the PHEV or EV with the configuration shown in FIG.
  • the power converter 102A has the same configuration as the charger 102 of FIG. 1 and has the same function as the charger 102 of FIG.
  • the power converter 102A of FIG. 3 has an additional function in addition to the function of the charger 102.
  • the first DC / AC inverter 120A has the same configuration as the first AC / DC converter 120 (FIG. 1), but may have a different configuration.
  • the first DC / AC converter 122A has the same configuration as the first DC / AC converter 122 (FIG. 1), but may have a different configuration.
  • the second AC / DC converter 126A has the same configuration as the second AC / DC converter 126 (FIG. 1).
  • the first transformer 128 in FIG. 3 has the same configuration as the first transformer 128 (FIG. 1), but may have a different configuration.
  • the primary side end 132A in FIG. 3 is the same end as the primary side end 132 (FIG. 1).
  • the first secondary side end 134A is the same end as the first secondary side end 134 (FIG. 1).
  • the first AC / DC converter 120A, the DC / AC converter 122A, and the second AC / DC converter 126A have a function of converting AC power and DC power in both directions.
  • the second AC / DC converter 126A converts the AC voltage to DC when the output voltage (AC voltage) from the first secondary end 134A of the first transformer 128 is input when the relays 164 and 166 are on. It has a function of converting it into a voltage and supplying it to the high voltage battery 106. Further, when the DC voltage is supplied from the high voltage battery 106 when the relays 164 and 166 are on, the second AC / DC converter 126A converts the DC voltage into an AC voltage and converts the DC voltage into the first 2 of the first transformer 128. It also has a function of supplying to the next end portion 134A.
  • the DC / AC converter 122A has a function of converting the DC voltage supplied from the first AC / DC converter 120A into an AC voltage and supplying it to the primary side end 132A of the first transformer 128. Further, the DC / AC converter 122A also has a function of converting the AC voltage supplied from the primary side end 132A into a DC voltage and supplying it to the first AC / DC converter 120A.
  • the first AC / DC converter 120A has a function of converting an AC voltage supplied from an external power source (for example, a commercial power source) outside the power converter 102A into a DC voltage and outputting the DC voltage to the DC / AC converter 122A.
  • an external power source for example, a commercial power source
  • the first AC / DC converter 120A also has a function of converting the DC voltage supplied from the DC / AC converter 122A into an AC voltage and outputting the AC voltage to the external side (external load Ld side in the example of FIG. 9).
  • an external power source for example, a commercial power source
  • the second AC / DC converter 126A When the relays 164 and 166 are turned on and the DC voltage is supplied from the high voltage battery 106, the second AC / DC converter 126A performs power conversion and AC to the first secondary side end 134A of the first transformer 128. Can supply voltage. At this time, the coil connected to the first secondary end 134A functions as a primary coil, and the coil connected to the primary end 132A functions as a secondary coil.
  • the second AC / DC converter 126A When the second AC / DC converter 126A outputs an AC voltage to the first secondary side end 134A, an AC voltage is generated at the primary side end 132A, and this AC voltage is supplied to the DC / AC converter 122A. ..
  • the DC / AC converter 122A can convert the AC voltage input from the primary side end 132A into a DC voltage and supply it to the first AC / DC converter 120A.
  • the first AC / DC converter 120A converts the input DC voltage into an AC voltage and connects an external terminal (external load Ld). Output to the terminal) side.
  • AC power equivalent to, for example, household power is supplied to the external load Ld.
  • the sub DC / DC converter 104 operates in the same manner as the sub DC / DC converter 104 in the first embodiment when the vehicle is running. Therefore, the "operation in the normal state when the vehicle is running" by the power supply system 300 is the same as that of the power supply system 100. Further, the “operation at the time of abnormality when the vehicle is running" by the power supply system 300 is the same as that of the power supply system 100.
  • the power supply system 300 is separately provided with a charger 102 similar to the power supply system 100 of the first embodiment, and when the high voltage battery 106 is charged by the charger 102 based on the electric power from the external power source. Charging can be performed in the same manner as in the first embodiment.
  • the relay unit 52 is turned on and the DC power from the charger 102 is converted by the sub DC / DC converter 104. Then, DC power may be supplied to the first conductive path 11.
  • the charger 102 does not have to be the configuration of FIG.
  • Various other configurations may be adopted as long as they can function as an in-vehicle charger.
  • the power converter 102A performs power conversion based on the power from the high-voltage battery 106 (first power storage unit), and the above-mentioned low-voltage system load (external load different from the first load and the second load). It is possible to perform an operation of supplying power to the Ld) side. Then, the power supply system 300 can also perform an operation of supplying electric power to the first conductive path 11 by utilizing a part of the functions of the power converter 102A. That is, the power supply system 300 can share some functions for both operations, and can realize both operations with a smaller configuration.
  • FIG. 10 shows the power supply system 400 according to the fourth embodiment of the present disclosure.
  • the power supply system 400 differs from the power supply system 200 of the second embodiment in that a power converter 102A is provided instead of the charger 102, and in addition to this point, the charger 102 and the relays 160 and 162 are added. ..
  • the power supply system 400 is the same as the power supply system 200 of the second embodiment except for these points.
  • the power supply system 400 is different from the power supply system 300 of the third embodiment only in that the switching device 250 is used instead of the switching device 50 (specifically, the relay unit 252 is used instead of the relay unit 52). It is a structural difference of. That is, the hardware configuration of the power supply system 400 shown in FIG.
  • the in-vehicle system 403 is a system in which the power supply system 100 is replaced with the power supply system 400 in the in-vehicle system 3 in FIGS. 1 and 2.
  • the sub DC / DC converter 104 operates in the same manner as the sub DC / DC converter 104 in the second embodiment when the vehicle is running. Therefore, the "operation in the normal state when the vehicle is running" by the power supply system 400 is the same as that of the power supply system 200. Further, the “operation at the time of abnormality when the vehicle is running" by the power supply system 400 is the same as that of the power supply system 400.
  • the power supply system 400 operates in the same manner as the power supply system 300 of the third embodiment at the time of external charging. Further, the power supply system 400 operates in the same manner as the power supply system 300 of the third embodiment when power is supplied to the external load Ld.
  • the main DC / DC converter 103 of the main DC / DC converter 103 and the sub DC / DC converter 104 is driven when the power consumption of the low-voltage system load is low in the normal state during vehicle running. ..
  • the main DC / DC converter 103 and the sub DC / DC converter 104 may always be driven when the vehicle is running and in a normal state.
  • the second supply circuit 22 is a circuit that supplies electric power based on the electric power from the high-voltage battery 106 (first power storage unit) that supplies electric power to the first supply circuit 21.
  • the second supply circuit may be a circuit that supplies electric power to the second conductive path based on the electric power from the electric power storage unit different from the electric power storage unit (first electric power storage unit) that supplies electric power to the first supply circuit.
  • the power supply that supplies power to the first supply circuit 21 and the power supply that supplies power to the second supply circuit 22 may be different.
  • the power supply system 100 includes the high voltage battery 106, but the power supply system 100 may not include the high voltage battery 106. That is, the power supply system 100 may be a device different from the high voltage battery 106.
  • the power supply system 100 includes the first low voltage battery 108A and the second low voltage battery 108B, but the power supply system 100 includes either one or both of the first low voltage battery 108A and the second low voltage battery 108B. It does not have to be. That is, the power supply system 100 may be a device different from either or both of the first low-voltage battery 108A and the second low-voltage battery 108B.
  • control unit 110 corresponds to an example of the relay control device, but the relay control device may be configured as a device different from the control unit 110.
  • control unit 110 functions as the first abnormality detection unit and the second abnormality detection unit, but one or both of the first abnormality detection unit and the second abnormality detection unit are different from the control unit 110. It may be composed of the following devices.
  • the first abnormality detection unit may determine that the first conductive path 11 side is abnormal when the current flowing through the first conductive path 11 is equal to or greater than the threshold value.
  • the second abnormality detection unit may determine that the second conductive path 12 side is abnormal when the current flowing through the second conductive path 12 is equal to or greater than the threshold value.
  • the first abnormality detection unit when an abnormality signal is acquired from the first load (first automatic operation load 196A or first auxiliary machine system load 194A) or a control device for controlling the first load (first automatic operation load 196A or first auxiliary equipment system load 194A), the first conductive path 11 side is It may be determined that it is abnormal.
  • the second abnormality detection unit acquires an abnormality signal from the second load (second automatic operation load 196B or second auxiliary machine system load 194B) or a control device that controls the second load, the second conductive path 12 It may be determined that the side is abnormal.
  • the first abnormality detection unit may determine that the first conductive path 11 side is abnormal when the SOH (States Of Health) of the first low-voltage battery 108A is in a deteriorated state of being equal to or less than a predetermined value.
  • the second abnormality detection unit may determine that the second conductive path 12 side is abnormal when the SOH (States Of Health) of the second low-voltage battery 108B is in a deteriorated state of being equal to or less than a predetermined value.
  • the power supply systems 100, 200, 300, and 400 are mounted on a vehicle such as a PHEV or EV has been described, but the present invention is not limited to this.
  • the power supply systems 100, 200, 300, and 400 may be mounted on a vehicle of a type other than these (for example, an HEV (Hybrid Electric Vehicle)), or may be mounted on a device other than the vehicle.
  • HEV Hybrid Electric Vehicle
  • Vehicle 3 In-vehicle system 11: First conductive path 11A: Conductive path 11B: Conductive path 12: Second conductive path 12A: Conductive path 12B: Conductive path 20: Power supply unit 21: First supply circuit 22: Second Supply circuit 50: Switching device 52: Relay unit 52A: Relay 52B: Relay 100: Power supply system 102: Charger (power converter) 102A: Power converter 103: Main DC / DC converter (second power conversion circuit) 104: Sub DC / DC converter (first power conversion circuit) 106: High-voltage battery (first power storage unit) 108A: First low-voltage battery 108B: Second low-voltage battery 110: Control unit (first abnormality detection unit, second abnormality detection unit) 112: PLG-ECU (first control unit) 114: HV-ECU (second control unit) 116: MG-ECU (3rd control unit) 120: 1st AC / DC converter 120A: 1st AC / DC converter 122: 1st DC / AC

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  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

Dans le système d'alimentation électrique selon l'invention, une unité d'alimentation électrique (20) effectue une première opération pour fournir de l'énergie électrique uniquement à un premier conducteur (11) parmi le premier conducteur (11) et un second conducteur (12) lorsqu'une première commande est conduite par une unité de commande (110) pendant un état d'arrêt d'une partie relais. L'unité d'alimentation électrique (20) effectue une seconde opération pour fournir de l'énergie électrique uniquement au second conducteur (12) parmi le premier conducteur (11) et le second conducteur (12) lorsqu'une seconde commande est conduite par l'unité de commande (110) pendant l'état d'arrêt de la partie relais.
PCT/JP2021/004863 2020-02-20 2021-02-10 Système d'alimentation électrique WO2021166750A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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WO2019039263A1 (fr) * 2017-08-24 2019-02-28 株式会社オートネットワーク技術研究所 Système d'alimentation électrique et véhicule électrique
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WO2019039263A1 (fr) * 2017-08-24 2019-02-28 株式会社オートネットワーク技術研究所 Système d'alimentation électrique et véhicule électrique
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EP4166378A1 (fr) * 2021-10-18 2023-04-19 Volvo Car Corporation Système de convertisseur pour le transfert d'énergie

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