WO2019039263A1 - 電源システム及び電気自動車 - Google Patents

電源システム及び電気自動車 Download PDF

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Publication number
WO2019039263A1
WO2019039263A1 PCT/JP2018/029530 JP2018029530W WO2019039263A1 WO 2019039263 A1 WO2019039263 A1 WO 2019039263A1 JP 2018029530 W JP2018029530 W JP 2018029530W WO 2019039263 A1 WO2019039263 A1 WO 2019039263A1
Authority
WO
WIPO (PCT)
Prior art keywords
power supply
supply path
relay
motor
abnormality
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/029530
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
佐藤　慎一郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Wiring Systems Ltd, AutoNetworks Technologies Ltd, Sumitomo Electric Industries Ltd filed Critical Sumitomo Wiring Systems Ltd
Priority to US16/637,367 priority Critical patent/US11349321B2/en
Priority to CN201880051431.7A priority patent/CN111032415B/zh
Publication of WO2019039263A1 publication Critical patent/WO2019039263A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • H02J1/00—Circuit arrangements for DC mains or DC distribution networks
    • H02J1/001—Hot plugging or unplugging of load or power modules to or from power distribution networks
    • 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
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • 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
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • 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
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0069—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to the isolation, e.g. ground fault or leak current
    • 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
    • B60L3/0092—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption with use of redundant elements for safety purposes
    • 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
    • B60L3/04—Cutting off the power supply under fault conditions
    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/51—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/52—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by DC-motors
    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/20—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/005—Testing of electric installations on transport means
    • G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • 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
    • H02J1/00—Circuit arrangements for DC mains or DC distribution networks
    • H02J1/08—Three-wire systems; Systems having more than three wires
    • H02J1/084—Three-wire systems; Systems having more than three wires for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
    • H02J1/086—Three-wire systems; Systems having more than three wires for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load or loads and source or sources when the main path fails
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H02J7/0032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits disconnection of loads if battery is not under charge, e.g. in vehicle if engine is not running
    • 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
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/40—Electrical machine applications
    • B60L2220/42—Electrical machine applications with use of more than one motor
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/549—Current
    • 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
    • B60L2260/00—Operating Modes
    • B60L2260/20—Drive modes; Transition between modes
    • B60L2260/26—Transition between different drive modes
    • 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
    • B60L2260/00—Operating Modes
    • B60L2260/20—Drive modes; Transition between modes
    • B60L2260/28—Four wheel or all wheel drive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/392—Determining battery ageing or deterioration, e.g. state of health
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/54—Testing for continuity
    • 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
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    • Y02T10/64—Electric machine technologies 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
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    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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    • 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
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    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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    • 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
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    • 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

  • Disclosed herein is technology relating to a power supply system.
  • Patent Document 1 includes a high voltage battery, an inverter for converting a direct current voltage of the high voltage battery into an alternating current voltage, and a drive motor to which an alternating current voltage output from the inverter is supplied. And a system main relay is interposed between them.
  • Another object of the present invention is to provide a power supply system and an electric vehicle capable of continuing the traveling of the vehicle.
  • the technology described in the present specification is a power supply system mounted on a vehicle, and includes a storage element, a first motor receiving power supply from the storage element and driving a front wheel side of the vehicle, A first relay disposed in a first power supply path between a storage element and the first motor, for turning on / off energization of the first power supply path, and a vehicle receiving power supply from the storage element A second motor for driving the rear wheel side of the second motor, and a second relay provided on a second power supply path between the storage element and the first motor to turn on / off energization of the second power supply path And a control unit that detects an abnormality in the first power supply path and the second power supply path, and a control unit that controls on / off of the first relay and the second relay, Is the first power supply path by the detection unit When the abnormality of the second power supply path is not detected, the first relay and the second relay are turned on to enable energization of the first power supply path and the second power supply path, When an abnormality
  • a plurality of the storage elements having a first storage element and a second storage element are provided, and power of the first storage element is supplied to the first motor by energization of the first power supply path, By energization of the second power supply path, the power of the second storage element is supplied to the second motor.
  • the power supply from one of the power supply paths to one of the motors is cut off.
  • the driving of the other motor can be continued.
  • the control circuit includes: a connection conductive path connecting between the first power supply path and the second power supply path; and a separation relay disposed on the connection conductive path to turn on / off energization of the connection conductive path, the control
  • the detection unit detects that no abnormality has occurred in the first power supply path and the second power supply path
  • the detection unit turns on the separation relay to energize the connection conductive path.
  • the separation relay is turned off to cut off the conduction of the connection conductive path. Do. In this way, when no abnormality occurs in the first power supply path and the second power supply path, the separation relay is turned on to energize the connection conductive path.
  • the power of both of the storage elements can be used to drive the first motor and the second motor. Further, when an abnormality occurs in at least one of the first power supply path and the second power supply path, the separation relay is turned off to interrupt the energization of the connection conductive path, so that one of the power supply paths is abnormal. Since the electric power is supplied to the motor by the normal power supply path, the driving of the vehicle can be continued without reaching the other normal power supply path.
  • An electric vehicle including the power supply system and capable of driving by driving the front wheel side and the rear wheel side with the first motor and the second motor.
  • Diagram showing the configuration of a power supply system mounted on a vehicle Diagram showing the electrical configuration of the power supply system Diagram showing the drive system of the vehicle at normal and abnormal times Flow chart showing processing of system control ECU
  • Embodiment The power supply system 20 according to the present embodiment is mounted on a vehicle 10, for example, an electric vehicle, and the front wheels 11A and the rear wheels 11B of the vehicle 10 are driven by power from two (plural) high voltage batteries 21A and 21B. is there.
  • the power supply system 20 includes a first high voltage battery 21A (an example of a “first storage element”), a second high voltage battery 21B (an example of a “second storage element”), and a vehicle 10. And a second motor 25B for driving the rear wheel 11B of the vehicle 10.
  • the first motor 25A is for driving the front wheel 11A.
  • the first high voltage battery 21A and the second high voltage battery 21B are lithium ion secondary batteries, and can store power capable of traveling the vehicle 10.
  • the first motor 25A and the second motor 25B are both motor generators capable of generating (regenerating) at the time of deceleration or the like.
  • the first motor 25A is fixed to the drive shaft 12 connecting a pair of wheels of the front wheel 11A to rotate the front wheel 11A
  • the second motor 25B is a drive connecting a pair of wheels of the rear wheel 11B It is fixed to the shaft 12 to rotate the rear wheel 11B.
  • the first motor 25A and the second motor 25B can be a DC motor or an AC motor.
  • the motors 25A and 25B are not limited to the configuration fixed to the drive shaft 12, and may be, for example, an in-wheel motor integrally attached to a wheel.
  • Conductive paths connecting high voltage batteries 21A and 21B to motors 25A and 25B include first high voltage battery 21A and first motor 25A. Between the first power supply path 30A electrically connecting between them, the second power supply path 30B electrically connecting between the second high voltage battery 21B and the second motor 25B, and the first power supply path 30A And a connection conductive path 31 for connecting the second power supply path 30B electrically.
  • a first relay 22A is connected in series to the first power supply path 30A, and power on / off of the first power supply path 30 is switched by turning on / off the first relay 22A.
  • the second relay 22B is connected in series to the second power supply path 30B, and conduction and disconnection of the second power supply path 30B are switched by turning on and off the second relay 22B.
  • the separation relay 32 is connected in series to the connection conductive path 31, and conduction and disconnection of the connection conductive path 31 are switched by turning on and off the separation relay 32.
  • the first relay 22A and the second relay 22B are system main relays, and can use, for example, an electromagnetic switch having a coil and a contact portion and capable of supplying a current necessary for traveling of the vehicle 10.
  • the present invention is not limited to this, and various switches can be used as the relays 22A and 22B.
  • semiconductor switches such as FETs (Field Effect Transistors) may be used.
  • a first high voltage battery 21A, a first relay 22A, a power converter 23A, and a first motor 25A are connected in series to the first power supply path 30A, and a second high voltage battery is connected to the second power supply path 30B.
  • 21B, a second relay 22B, a power converter 23B, and a second motor 25B are connected in series.
  • the power conversion units 23A and 23B use a DC-DC converter when supplying DC power to the motors 25A and 25B, and use an inverter when supplying AC power to the motors 25A and 25B.
  • the power conversion units 23A and 23B output DC power to the high voltage batteries 21A and 21B.
  • Step-down conversion units 24A and 24B are connected to the conductive paths branched from the power supply paths 30A and 30B.
  • the step-down conversion units 24A and 24B are, for example, step-down DC-DC converters, and are connected in parallel to the motors 25A and 25B.
  • the step-down conversion units 24A and 24B are connected to the 12 [V] system battery 33 and the load 34.
  • the battery 33 is, for example, a lead battery
  • the load 34 is, for example, an electrical component such as a lamp operated by a 12 [V] power supply.
  • the power supply system 20 includes two (multiple) electric storage control ECUs (Electronic Control Units) 29A and 29B and one system control ECU (Electronic Control Unit) 26.
  • the storage control ECU 29A is connected to the first high voltage battery 21A
  • the storage control ECU 29B is connected to the second high voltage battery 21B.
  • the storage control ECUs 29A and 29B detect the voltage and current of the high voltage batteries 21A and 21B, and output a detection signal SA corresponding to the detected voltage value or current value of the high voltage batteries 21A and 21B to the system control ECU 26.
  • the system control ECU 26 detects the abnormality (fault) such as disconnection of the power supply paths 30A, 30B or ground fault based on the voltage or current of the power supply paths 30A, 30B, and the relays 22A, 22B, 32 And a control unit 28 for controlling the operation.
  • Detection unit 27 responds to voltage values and current values at respective points of motors 25A and 25B, relays 22A and 22B, power conversion units 23A and 23B, step-down conversion units 24A and 24B, and the like among power supply paths 30A and 30B.
  • the storage control ECUs 29A and 29B input a detection signal SA according to the voltage value or the current value of the high voltage batteries 21A and 21B.
  • the detection unit 27 detects whether or not an abnormality (failure) occurs in the power supply paths 30A and 30B based on the voltage value and the current value at each point of the power supply paths 30A and 30B acquired by the detection signal SA. .
  • the voltage value and the current value are compared with predetermined threshold values to detect (determine) an abnormality in the power supply paths 30A and 30B.
  • the present invention is not limited to this, and when the fluctuation range of the voltage or the fluctuation range of the current within a predetermined time exceeds a predetermined threshold, it may be detected (judged) as abnormal (failure).
  • the abnormality may be determined based on both the voltage value and the current value, the present invention is not limited thereto, and at least one of the voltage value and the current value (at least one of the voltage fluctuation range or the current fluctuation range) is compared with a predetermined threshold value. An abnormality may be detected (judged).
  • abnormality of electric power supply path 30A, 30B for example, the defect of high voltage battery 21A, 21B, failure or deterioration (capacity reduction, output reduction), ON failure or failure of first relay 22A and second relay 22B.
  • An abnormality (voltage abnormality, current abnormality) or the like caused by a failure, an open circuit failure or a short circuit failure of the converter or inverter, a short circuit failure of the motor 25A, 25B, an open circuit failure or the like can be considered.
  • Control unit 28 outputs a control signal SC for controlling the operation of relays 22A, 22B, 32 in accordance with the detection result of the abnormality in detection unit 27. Specifically, when an abnormality occurs in at least one of the power supply paths 30A and 30B, the control unit 28 turns off the separation relay 32 and sets the relay 22A (22B) on the side where the abnormality occurs. The power supply to the motor 25A (25B) on the side where the abnormality occurs in the off state is stopped, and the motor on the side where the abnormality does not occur using the power supply path 30B (30A) on the side where the abnormality does not occur The drive state is changed so that power is supplied to 25 B (25 A) and driven (FIG. 3). Thus, when an abnormality occurs in the first power supply path 30A, only the rear wheel is driven, and when an abnormality occurs in the second power supply path 30B, only the front wheel is driven.
  • the system control ECU 26 is connected to the operation unit 36 as shown in FIG.
  • the operation unit 36 is provided, for example, in the passenger compartment of the vehicle 10 and can be operated by the user, and selection of any of four-wheel drive (4WD), front wheel drive, and rear wheel drive is possible. ing.
  • 4WD four-wheel drive
  • the front and rear wheels are driven to travel by driving of both the first motor 25A and the second motor 25B.
  • the front wheel 11A is driven by the driving force of the first motor 25A, and the output of the second motor 25B is reduced to auxiliaryly drive the rear wheel 11B.
  • the rear wheel 11B is driven by the driving force of the second motor 25B, and the first motor 25A reduces the output to auxiliaryly drive the front wheel 11A.
  • the operation unit 36 outputs information of the selected drive state to the system control ECU 26.
  • the system control ECU 26 normally drives the vehicle 10 in the drive state selected by the operation unit 36 in the normal state (when no abnormality occurs in the power supply paths 30A and 30B), and the abnormality in the power supply paths 30A and 30B.
  • the drive state is changed and, for example, information of the current drive state is output to the operation unit 36, and the operation unit 36 notifies the user of the current drive state by display of the display unit or the like.
  • the system control ECU 26 normally outputs the control signal SC to the separation relay 32, the first relay 22A and the second relay 22B, and the separation relay 32, the first relay 22A and the second All of the relays 22B of the above are turned on (S1).
  • the first power supply path 30A, the second power supply path 30B, and the connection conductive path 31 are in a state in which all of the power can be supplied.
  • four-wheel drive and front wheel drive (rear wheel assist)
  • the vehicle 10 can travel by either rear wheel drive (front wheel assist) (see FIG. 3).
  • the system control ECU 26 also receives detection signals SA corresponding to voltage values and current values of a plurality of locations in the first power supply path 30A and the second power supply path 30B at predetermined time intervals (S2). Then, the detection unit 27 of the system control ECU 26 compares the voltage value or the current value of the received detection signal SA with a predetermined threshold value stored in advance in the memory, and exceeds the predetermined threshold value (or less than the predetermined threshold value) The presence or absence of an abnormality is detected (judged) based on whether or not (S3).
  • Power supply system 20 mounted on vehicle 10, which is a first motor 25A for driving the front wheel 11A side of vehicle 10 by being supplied with power from high voltage batteries 21A, 21B (storage devices) and high voltage batteries 21A, 21B.
  • first relay 22A disposed in the first power supply path 30A between the high voltage batteries 21A and 21B and the first motor 25A to turn on and off the power supply path 30A, and the high voltage batteries 21A and 21B
  • a second power supply path 30B between the high voltage batteries 21A and 21B and the first motor 25A, which are supplied with power from the second motor 25B for driving the rear wheel 11B side of the vehicle 10
  • the second relay 22B for turning on / off the power supply to the two power supply paths 30B, and the detection unit 27 for detecting an abnormality in the first power supply path 30A and the second power supply path 30B
  • a control unit 28 that controls on / off of the first relay 22A and the second relay 22B, and the control unit 28 causes the detection unit 27 to detect an abnormality in the first power supply path 30A and the second power supply path 30B.
  • the first relay 22A and the second relay 22B are turned on to enable energization of the first power supply path 30A and the second power supply path 30B, and the detection unit 27 detects the first power supply path 30A.
  • the first relay 22A is turned off to de-energize the first power supply path 30A
  • the detection unit 27 detects an abnormality in the second power supply path 30B
  • the second relay 22A is turned off.
  • the relay 22B is turned off to de-energize the second power supply path 30B.
  • the present embodiment such as disconnection or ground fault in one of the first power supply path 30A and the second power supply path 30B for supplying power from the high voltage batteries 21A and 21B to the first motor 25A and the second motor 25B.
  • the power supply paths 30A and 30B on the side where the abnormality is detected is de-energized, and the power supply paths 30A and 30B on the side where the abnormality is not detected are conductive. Since it is possible to continue driving of the vehicle 10, traveling of the vehicle 10 can be continued. Therefore, even if abnormality such as disconnection or ground fault occurs in one of power supply paths 30A, 30B from high voltage batteries 21A, 21B to motors 25A, 25B, it is possible to continue traveling of vehicle 10. .
  • a plurality of high-voltage batteries 21A and 21B having a first high-voltage battery 21A (first storage element) and a second high-voltage battery 21B (second storage element) are provided, and the first power supply path 30A is energized.
  • the electric power of the first high voltage battery 21A is supplied to the first motor 25A, and the electric power of the second high voltage battery 21B is supplied to the second motor 25B by energization of the second electric power supply path 30B.
  • one of the power supply paths 30A, 30B when an abnormality occurs in one of the power supply paths 30A, 30B due to a failure of one of the first high voltage battery 21A and the second high voltage battery 21B, one of the power supply paths 30A (30B) Power supply to the motor 25A (25B) is cut off, and power supply from the other power supply path 30B (30A) to the other motor 25B (25A) is performed to drive the other motor 25B (25A). It can continue. As a result, even if one of the first high voltage battery 21A and the second high voltage battery 21B fails, the traveling of the vehicle 10 can be continued. Therefore, compared with the case where one high voltage battery is used. Thus, the traveling of the vehicle 10 can be reliably continued.
  • connection conductive path 31 connecting between the first power supply path 30A and the second power supply path 30B, and a separation relay 32 disposed in the connection conductive path 31 for turning on / off the conduction of the connection conductive path 31
  • the control unit 28 turns on the separation relay 32 when the detection unit 27 detects that no abnormality has occurred in the first power supply path 30A and the second power supply path 30B.
  • the connection relay path 31 is turned off by turning off the separation relay 32. Turn off the power.
  • the separation relay 32 when abnormality does not occur in the first power supply path 30A and the second power supply path 30B, the separation relay 32 is turned on and the connection conductive path 31 can be energized.
  • the power of both the high voltage battery 21A and the high voltage battery 21B can be used to drive the first motor 25A and the second motor 25B.
  • the separation relay 32 when an abnormality occurs in at least one of the first power supply path 30A and the second power supply path 30B, the separation relay 32 is turned off and the conduction of the connection conductive path 31 is interrupted. Since the abnormality of the path 30A (30B) does not extend to the other normal power supply path 30B (30B), the electric power is supplied to the motor 25B (25A) by the normal power supply path 30B (30A). Can continue.
  • the technology described in the present specification is not limited to the embodiments described above with reference to the drawings, and, for example, the following embodiments are also included in the technical scope of the technology described in the present specification.
  • the invention is not limited to this.
  • three or more high voltage batteries may be provided to supply power to the motors 25A, 25B from three or more high voltage batteries.
  • the high voltage battery is not limited to a plurality, and one high voltage battery can be connected to both the first power supply path and the second power supply path so that the power can be supplied. Power may be supplied to both of the two motors 25B.
  • detection of abnormality in the power supply paths 30A and 30B is performed by detecting at least one of a plurality of detection points in the power supply paths 30A and 30B at a predetermined threshold voltage or current (or fluctuation range).
  • a predetermined threshold voltage or current or fluctuation range.
  • detection part 26 and control part 27 were provided in system control ECU 26, it is not restricted to this.
  • the detection unit 26 and the control unit 27 may be provided in different ECUs.
  • the vehicle 10 was used as the electric vehicle, it is not restricted to this. For example, it may be a hybrid car.
  • the storage element is a lithium ion storage battery, it is not limited thereto, and may be another storage battery.
  • the storage element is not limited to a storage battery (battery), and may be a capacitor.

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  • Engineering & Computer Science (AREA)
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  • Transportation (AREA)
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  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
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US11349321B2 (en) 2022-05-31
US20210376627A1 (en) 2021-12-02
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JP2019041468A (ja) 2019-03-14

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