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WO2010061449A1 - Système source d’énergie, véhicule hybride, et procédé de commande de la charge du système source d’énergie - Google Patents

Système source d’énergie, véhicule hybride, et procédé de commande de la charge du système source d’énergie Download PDF

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Publication number
WO2010061449A1
WO2010061449A1 PCT/JP2008/071522 JP2008071522W WO2010061449A1 WO 2010061449 A1 WO2010061449 A1 WO 2010061449A1 JP 2008071522 W JP2008071522 W JP 2008071522W WO 2010061449 A1 WO2010061449 A1 WO 2010061449A1
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WIPO (PCT)
Prior art keywords
power storage
power
charging
unit
storage unit
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PCT/JP2008/071522
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English (en)
Japanese (ja)
Inventor
高田　登志広
宏紀 原田
Original Assignee
トヨタ自動車株式会社
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Priority to PCT/JP2008/071522 priority Critical patent/WO2010061449A1/fr
Publication of WO2010061449A1 publication Critical patent/WO2010061449A1/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
    • 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
    • B60L53/10—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 the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
    • B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/44—Series-parallel type
    • B60K6/445—Differential gearing distribution type
    • 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
    • B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
    • B60L50/16—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
    • 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
    • B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/24—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
    • B60W10/26—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/13—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric 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
    • B60L2210/00—Converter types
    • B60L2210/20—AC to AC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy
    • B60W2510/244—Charge state
    • 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
    • Y02T10/62—Hybrid vehicles
    • 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

  • the present invention relates to a power supply system and a hybrid vehicle equipped with a plurality of chargeable / dischargeable power storage units, and a charge control method for the power supply system, and in particular, a configuration for externally charging a plurality of power storage units with electric power from an external power supply.
  • a power supply system and a hybrid vehicle equipped with a plurality of chargeable / dischargeable power storage units, and a charge control method for the power supply system, and in particular, a configuration for externally charging a plurality of power storage units with electric power from an external power supply.
  • a hybrid vehicle that travels by efficiently combining an internal combustion engine and an electric motor has been put into practical use.
  • Such a hybrid vehicle is equipped with a chargeable / dischargeable power storage unit to supply electric power to the electric motor when starting or accelerating and generating driving force, while the kinetic energy of the vehicle is used during downhill or braking. Is recovered as electric power.
  • a configuration for charging a power storage unit to be mounted with electric power from an external power source such as a commercial power source has been proposed.
  • an external power source such as a commercial power source
  • the fuel consumption can be improved because the internal combustion engine can be kept stopped for relatively short distances such as commuting and shopping. It becomes possible.
  • Such traveling is also referred to as EV (Electric Vehicle) traveling.
  • Patent Document 1 describes the amount of remaining power up to the SOC where charging power is limited by a plurality of power storage devices.
  • a distribution ratio calculation unit that calculates a distribution ratio of charging power to a plurality of power storage devices according to the calculated ratio of the remaining power amount, and distribution of charging power when power is supplied from the load device to the power supply system.
  • a configuration including a converter control unit that controls a plurality of converters provided corresponding to a plurality of power storage devices in accordance with a rate is disclosed.
  • the power storage unit since the power storage unit stores electrical energy using an electrochemical action, its charge / discharge characteristics are easily affected by temperature. In a general power storage unit, the charge / discharge characteristics decrease as the temperature decreases. In addition, the power storage unit has a temperature dependency that the internal resistance increases as the temperature decreases.
  • the battery voltage of the power storage unit is represented by the sum of the electromotive voltage and the voltage drop in the internal resistance.
  • the voltage drop in the internal resistance increases. Therefore, in order to keep the battery voltage within a predetermined allowable range, it is necessary to reduce the charging current of the power storage unit as the electromotive voltage increases. This is effective in preventing the deterioration of the power storage unit, but significantly reduces the charging efficiency of the power storage unit.
  • Patent Document 1 in the configuration in which a plurality of power storage devices are charged according to the charge distribution ratio, due to the decrease in charging efficiency, at a low temperature, As a result, it takes a long time to complete charging of all the power storage devices. As a result, the external charging cannot be completed in the period from the completion of traveling until the next traveling is started, that is, the period in which external charging is to be performed, and the SOC of each power storage device becomes a relatively low value. Therefore, the transition from EV traveling to HV traveling in which the operation of the engine is allowed is inevitably performed in a relatively short time after the start of traveling. As a result, the travel distance in EV travel cannot be extended, and the contribution to the fuel efficiency improvement and environmental protection of the hybrid vehicle having the external charging function is reduced.
  • an object of the present invention is to provide a power supply system and a hybrid vehicle that can efficiently externally charge a plurality of power storage units even in a low temperature environment, And providing a charge control method for the power supply system.
  • a power supply system includes a plurality of chargeable / dischargeable power storage units, a plurality of voltage conversion units respectively associated with the plurality of power storage units, and a plurality of voltage conversion units connected in parallel to each other.
  • a power line pair a charging unit for externally charging a plurality of power storage units by receiving power from an external power source, a voltage detection unit for detecting a voltage value for each of the plurality of power storage units, and a plurality of power storage units
  • a control device that controls the plurality of voltage conversion units so that the plurality of power storage units are charged with the charging power from the charging unit when the external power supply is in a chargeable state.
  • the control device converts the corresponding voltage conversion so that the first power storage unit among the plurality of power storage units is charged with the charging power from the charging unit. And the second power storage unit among the first power storage unit and the remaining power storage unit is charged from the charging unit when the voltage value of the first power storage unit reaches a predetermined upper limit voltage value.
  • a charge control unit that controls the corresponding voltage conversion unit to be charged with electric power is included.
  • the charging control unit is configured to perform voltage conversion so that the first power storage unit is charged with the first charging power from the charging unit when the plurality of power storage units are in a state that can be charged by an external power source.
  • the first charging is performed so that the voltage value of the first power storage unit does not exceed the predetermined upper limit voltage value.
  • control device further includes a state estimation unit that estimates a charge state value for each of the plurality of power storage units.
  • a state estimation unit that estimates a charge state value for each of the plurality of power storage units.
  • the charge control unit controls the corresponding voltage conversion unit so that the second power storage unit is charged with the charging power from the charging unit.
  • the charging control unit is selected as the first power storage unit in the previous external charging of the plurality of power storage units among the plurality of power storage units when the plurality of power storage units are made chargeable by an external power source.
  • a power storage unit switching unit that selects a power storage unit different from the power storage unit as the first power storage unit.
  • the hybrid vehicle is an internal combustion engine that operates by fuel, a power generation unit that can generate power by receiving power generated by the operation of the internal combustion engine, and is charged by electric power from the power generation unit A plurality of power storage units, a motor that generates a driving force by power from at least one of the power generation unit and the plurality of power storage units, and a power line pair configured to be able to transfer power between the motor and the plurality of power storage units And a plurality of voltage conversion units provided between the plurality of power storage units and the power line pairs, each of which performs a voltage conversion operation between the corresponding power storage unit and the power line pair, and are electrically connected to an external power source.
  • the control device converts the corresponding voltage conversion so that the first power storage unit among the plurality of power storage units is charged with the charging power from the charging unit.
  • the second power storage unit among the first power storage unit and the remaining power storage unit is charged from the charging unit when the voltage value of the first power storage unit reaches a predetermined upper limit voltage value.
  • a charge control unit that controls the corresponding voltage conversion unit to be charged with electric power is included.
  • a charge control method for a power supply system including a plurality of chargeable / dischargeable power storage units, the power supply system including a plurality of voltage conversion units respectively associated with the plurality of power storage units.
  • a power line pair in which a plurality of voltage conversion units are connected in parallel to each other, and a charging unit for externally charging the plurality of power storage units by receiving power from an external power source.
  • the charging control method includes a step of detecting a voltage value for each of the plurality of power storage units, and a first power storage unit among the plurality of power storage units when the plurality of power storage units are in a state capable of being charged by an external power source.
  • the step of controlling the voltage conversion unit corresponds to the corresponding voltage conversion so that the first power storage unit is charged with the first charging power when the plurality of power storage units are made chargeable by an external power source.
  • the voltage value of the first power storage unit reaches a predetermined upper limit voltage value
  • the first charging is performed so that the voltage value of the first power storage unit does not exceed the predetermined upper limit voltage value.
  • the charge control method further includes a step of estimating a charge state value for each of the plurality of power storage units.
  • the step of controlling the voltage conversion unit corresponds to voltage conversion so that the second power storage unit is charged with the charging power from the charging unit when the state of charge value of the first power storage unit reaches a predetermined upper limit value. Control part.
  • the charge control method is selected as the first power storage unit in the previous external charging of the plurality of power storage units among the plurality of power storage units when the plurality of power storage units are made chargeable by an external power source.
  • the method further includes the step of selecting a power storage unit different from the power storage unit as the first power storage unit.
  • a plurality of power storage units can be efficiently externally charged even in a low temperature environment.
  • FIG. 1 is a schematic configuration diagram for charging a vehicle including a power supply system according to an embodiment of the present invention with an external power supply.
  • FIG. It is a block diagram which shows the control structure in the control apparatus according to embodiment of this invention. It is a block diagram which shows the more detailed control structure in the converter control part shown in FIG. It is a figure which shows an example of the time change of the battery voltage of an electrical storage part, SOC, and battery current in execution of external charging. It is a figure which shows power transfer in case a 1st electrical storage part is made into charge object. It is a figure which shows electric power transfer at the time of making a 1st electrical storage part and a 2nd electrical storage part into charge object. It is a figure which shows an example of the time change of the battery voltage and SOC of an electrical storage part in execution of the external charge at the time of low temperature. It is a flowchart which shows the process sequence of the external charge according to embodiment of this invention.
  • FIG. 1 is a schematic configuration diagram for charging vehicle 100 including a power supply system according to an embodiment of the present invention with an external power supply.
  • a vehicle 100 is typically a hybrid vehicle, and is mounted with an internal combustion engine (engine) 18 and electric motors (motor generators) MG1 and MG2, and driven from each of them. Drive with optimal force ratio. Furthermore, vehicle 100 is equipped with a plurality of power storage units (for example, two) for supplying electric power to this motor generator. These power storage units can be charged by receiving the power generated by the operation of the engine 18 in the system start-up state of the vehicle 100 (hereinafter also referred to as “IG-on state”), while the system of the vehicle 100 is stopped (hereinafter, In the “IG off state”), the battery can be charged by being electrically connected to an external power source via the connector portion 350.
  • IG-on state system start-up state of the vehicle 100
  • IG off state the system of the vehicle 100
  • the battery can be charged by being electrically connected to an external power source via the connector portion 350.
  • charging of the power storage unit by the external power source is also referred to as “external charging”
  • Connector unit 350 typically constitutes a coupling mechanism for supplying external power source such as commercial power source to vehicle 100, and is coupled to a charging station (not shown) via power line PSL formed of a cabtire cable or the like. .
  • Connector unit 350 is connected to vehicle 100 during external charging, and electrically connects an external power source and charging unit 30 mounted on vehicle 100.
  • vehicle 100 is provided with a connector receiving portion 150 that is connected to connector portion 350 and receives an external power supply.
  • the external power supplied to the vehicle 100 via the connector unit 350 may be power generated by a solar cell panel installed on the roof of a house instead of or in addition to the commercial power.
  • Vehicle 100 includes an engine (ENG) 18, a first motor generator MG 1, and a second motor generator MG 2 as driving force sources, which are mechanically coupled via a power split mechanism 22. Then, according to the traveling state of the vehicle 100, the driving force is distributed and combined among the three persons via the power split mechanism 22, and as a result, the driving wheels 24F are driven.
  • ENG engine
  • first motor generator MG 1 motor generator
  • second motor generator MG 2 driving force sources
  • power split mechanism 22 divides the driving force generated by the operation of engine 18 into two parts, distributes one of them to first motor generator MG1 side, and the remaining part. Is distributed to the second motor generator MG2.
  • the driving force distributed from the power split mechanism 22 to the first motor generator MG1 side is used for power generation, while the driving force distributed to the second motor generator MG2 side is the driving force generated by the second motor generator MG2. It is synthesized and used to drive the drive wheel 24F.
  • first inverter (INV1) 8-1 and the second inverter (INV2) 8-2 respectively associated with the motor generators MG1 and MG2 mutually convert DC power and AC power.
  • first inverter 8-1 converts AC power generated by first motor generator MG1 into DC power in response to switching command PWM1 from control device 2, and supplies the DC power to positive bus MPL and negative bus MNL.
  • the second inverter 8-2 converts the DC power supplied via the positive bus MPL and the negative bus MNL into AC power in response to the switching command PWM2 from the control device 2 to generate the second motor generator MG2. To supply.
  • vehicle 100 includes second motor generator MG2 that can receive electric power from power storage units 4-1 and 4-2 and generate a driving force as a load device, and can generate electric power by receiving a driving force from engine 18.
  • second motor generator MG2 that can receive electric power from power storage units 4-1 and 4-2 and generate a driving force as a load device, and can generate electric power by receiving a driving force from engine 18.
  • a first motor generator MG1 which is a possible power generation unit is provided.
  • Each of the first power storage unit (BAT1) 4-1 and the second power storage unit (BAT2) 4-2 is a chargeable / dischargeable power storage element, typically a secondary battery such as a lithium ion battery or nickel metal hydride, Or it is comprised with electrical storage elements, such as an electric double layer capacitor.
  • a first converter (CONV1) 6-1 capable of mutually converting DC voltages is arranged, and the first power storage unit 4-1 The input / output voltage of 1 and the line voltage between the positive bus MPL and the negative bus MNL are boosted or lowered with respect to each other.
  • a second converter (CONV2) 6-2 capable of mutually converting a DC voltage is arranged between the second power storage unit 4-2 and the second inverter 8-2.
  • the input / output voltage of unit 4-2 and the line voltage between positive bus MPL and negative bus MNL are boosted or lowered mutually.
  • converters 6-1 and 6-2 are connected in parallel to positive bus MPL and negative bus MNL, which are power line pairs.
  • the step-up / step-down operations in converters 6-1 and 6-2 are controlled in accordance with switching commands PWC1 and PWC2 from control device 2, respectively.
  • the control device 2 is typically an electronic control device mainly composed of a CPU (Central Processing Unit), a storage unit such as a RAM (Random Access Memory) and a ROM (Read Only Memory), and an input / output interface ( ECU: Electronic Control Unit). And the control apparatus 2 performs control which concerns on vehicle driving
  • CPU Central Processing Unit
  • RAM Random Access Memory
  • ROM Read Only Memory
  • ECU Electronic Control Unit
  • FIG. 1 shows battery currents Ibat1, Ibat2 from the current sensors 10-1, 10-2 inserted in the positive lines PL1, PL2, a positive line PL1, and a negative line.
  • Battery voltage Vbat1 from voltage sensor 12-1 disposed between lines with NL1 battery voltage Vbat2 from voltage sensor 12-2 disposed between lines between positive line PL2 and negative line NL2, power storage unit 4- 1, battery temperature Tbat1, Tbat2 from temperature sensors 11-1, 11-2 arranged in proximity to the bus, bus current IDC from current sensor 14 inserted in the positive bus MPL, positive bus MPL
  • the bus voltage VDC from the voltage sensor 16 arranged between the negative bus MNL and the line is illustrated.
  • control device 2 continuously estimates the state of charge (SOC: State Of Charge; hereinafter, also simply referred to as “SOC”) of power storage units 4-1 and 4-2.
  • SOC State Of Charge
  • the SOC can also be expressed as an absolute value (unit [A ⁇ h] or the like) of the charge amount of the power storage unit.
  • the SOC is a ratio of the charge amount to the charge capacity of the power storage unit (0 to 100). %).
  • Vehicle 100 further includes a connector receiving unit 150 and a charging unit 30 as a configuration for externally charging power storage units 4-1 and 4-2.
  • connector unit 350 is connected to connector receiving unit 150, so that an external power source can be connected via positive charging line CPL and negative charging line CNL. Is supplied to the charging unit 30.
  • the connector receiving unit 150 includes a connection detection sensor 150a for detecting the connection state between the connector receiving unit 150 and the connector unit 350, and the control device 2 receives the connection signal CON from the connection detection sensor 150a. Detect that charging is possible with an external power supply. In the present embodiment, a case where a single-phase AC commercial power supply is used as an external power supply is illustrated.
  • the “state that can be charged by an external power source” typically means a state in which the connector portion 350 is physically inserted into the connector receiving portion 150.
  • a configuration in which an external power source and a vehicle are electromagnetically coupled in a non-contact manner to supply power specifically, a primary coil is provided on the external power source side, and a vehicle side is provided.
  • the state in which charging by an external power supply is possible means that the primary coil and the secondary coil are positioned. It means the combined state.
  • Charging unit 30 is a device for externally charging power storage units 4-1 and 4-2 by receiving electric power from an external power source, and includes positive line PL1, negative line NL1, positive charge line CPL, and negative charge line CNL. It is arranged between. That is, charging unit 30 is electrically connected between first power storage unit 4-1 and first converter 6-1 corresponding to first power storage unit 4-1.
  • Charging unit 30 includes a current control unit 30a and a voltage conversion unit 30b, and converts power from an external power source into power suitable for charging power storage units 4-1, 4-2.
  • voltage conversion unit 30b is a device for converting the supply voltage of the external power source into a voltage suitable for charging power storage units 4-1, 4-2, and typically has a predetermined transformation ratio. It consists of a wound-type transformer, an AC-AC switching regulator, and the like.
  • current control unit 30a rectifies the AC voltage after voltage conversion by voltage conversion unit 30b to generate a DC voltage, and in accordance with charging current command Ich * from control device 2, power storage units 4-1, 4- The charging current supplied to 2 is controlled.
  • the current control unit 30a typically includes a single-phase bridge circuit or the like. Instead of the configuration including the current control unit 30a and the voltage conversion unit 30b, the charging unit 30 may be realized by an AC-DC switching regulator or the like.
  • control device 2 when control device 2 according to the present embodiment detects that charging is possible with an external power supply, it selects one of power storage units 4-1 and 4-2 as a charging target and starts external charging. To do. When the battery voltage Vbat of the power storage unit to be charged reaches a predetermined upper limit voltage value VL, the control device 2 starts external charging to the remaining power storage unit, thereby externally charging the power storage unit to be charged. Charging and external charging for the remaining power storage unit are executed in parallel.
  • the upper limit voltage value VL is the upper limit value of the allowable range of the battery voltage Vbat, and may be set in advance based on the characteristic value of the power storage unit, or may be dynamically set according to the usage status of the power storage unit. May be set.
  • the power storage units 4-1 and 4-1 are started.
  • the total value of the allowable discharge power of power storage units 4-1 and 4-2 (the maximum power value that is allowed to be discharged in the power storage unit) It is possible to increase the total allowable discharge power in a shorter period.
  • each SOC is relatively low (for example, x%), and the SOC is relatively higher (for example, 2x%) than the total allowable discharge power value of power storage units 4-1, 4-2.
  • the allowable discharge power of power storage unit 4-1 becomes larger.
  • the total allowable discharge power value increases rapidly by selecting one power storage unit and starting external charging, so that the discharge capacity of the entire power supply system can be increased. Therefore, even when the period during which external charging is performed is short, the travel distance for EV travel in vehicle 100 can be extended after the next start of the vehicle system.
  • control device 2 performs EV traveling until the SOC of power storage unit falls below a predetermined value, but the SOC of power storage units 4-1, 4-2.
  • both are relatively low values, the EV travel is shifted to the HV travel in a relatively short time.
  • the SOC of one selected power storage unit has a relatively high value, the travel distance in EV travel can be extended. As a result, fuel consumption and environmental performance can be improved.
  • power storage units 4-1 and 4-2 correspond to “a plurality of power storage units”, and converters 6-1 and 6-2 have “ The positive bus MPL and the negative bus MNL correspond to the “power line pair”, and the charging unit 30 corresponds to the “charging unit”.
  • Control structure A control structure for externally charging a plurality of power storage units in the power supply system according to the present embodiment will now be described with reference to FIGS.
  • FIG. 2 is a block diagram showing a control structure in control device 2 according to the embodiment of the present invention.
  • Each function block shown in FIG. 2 is typically realized by the control device 2 executing a program stored in advance, but part or all of the function may be implemented as hardware.
  • control device 2 includes an SOC1 calculation unit 50, an SOC2 calculation unit 52, and a converter control unit 54.
  • the SOC1 calculation unit 50 estimates the SOC1 of the first power storage unit 4-1, based on the battery temperature Tbat1, the battery current Ibat1, the battery voltage Vbat1, and the like. Specifically, SOC1 calculating unit 50 sequentially calculates SOC1 of first power storage unit 4-1, based on the integrated value of the charge / discharge amount of first power storage unit 4-1. Note that the integrated value of the charge / discharge amount can be obtained by temporally integrating the product (electric power) of the battery voltage and the battery current of the corresponding power storage unit. Similar to SOC1 calculation unit 50, SOC2 calculation unit 52 estimates SOC2 of second power storage unit 4-2 based on battery temperature Tbat2, battery current Ibat2, battery voltage Vbat2, and the like.
  • Converter control unit 54 receives SOC1 of first power storage unit 4-1 from SOC1 calculation unit 50 as information regarding first power storage unit 4-1, and receives temperature sensor 11-1, current sensor 10-1, voltage sensor 12-. 1 receives battery temperature Tbat1, battery current Ibat1, and battery voltage Vbat1. Further, converter control unit 54 receives SOC2 of second power storage unit 4-1 from SOC2 calculation unit 50 as information related to second power storage unit 4-2, and receives temperature sensor 11-2, current sensor 10-2, voltage sensor. The battery temperature Tbat2, battery current Ibat2, and battery voltage Vbat2 from 12-2 are received. Further, converter control unit 54 receives bus current IDC from current sensor 14, bus voltage VDC from voltage sensor 16, connection signal CON from connection detection sensor 150a, and signal IG indicating the operation state of the ignition switch. . Then, based on these input information, converter control unit 54 is configured to charge power storage units 4-1 and 4-2 with charging current Ich from charging unit 30 when charging is possible with an external power supply. The converters 6-1 and 6-2 corresponding to are controlled.
  • FIG. 3 is a block diagram showing a more detailed control structure in converter control unit 54 shown in FIG.
  • converter control unit 54 includes a power storage unit switching unit 60, a current command generation unit 62, a drive signal generation unit 64, and a storage unit 66.
  • Power storage unit switching unit 60 stores the history of external charging of power storage units 4-1 and 4-2 stored in storage unit 66, SOC 1 and SOC 2 of power storage units 4-1 and 4-2, and battery voltage Vbat 1. , Vbat2 to switch the power storage unit to be charged during the execution of external charging.
  • power storage unit switching unit 60 first selects a power storage unit to be charged based on an external charging execution history read from storage unit 66 when charging is possible with an external power supply.
  • storage part 66 consists of non-volatile memories, and memorize
  • power storage unit switching unit 60 reads from power storage unit 66 a power storage unit (for example, second power storage unit 4-2) that was first selected as a charging target in the previous external charging, power storage unit ( For example, the first power storage unit 4-1) is selected as the first charging target in the current external charging.
  • the power storage unit switching unit 60 updates the first power storage unit selected in the previous external charging stored in the storage unit 66 to the selected first power storage unit 4-1.
  • the power storage unit switching unit 60 determines that the battery voltage Vbat1 has reached a predetermined upper limit voltage value VL. The charging target is switched from the first power storage unit 4-1 to the first power storage unit 4-1 and the second power storage unit 4-2. Further, power storage unit switching unit 60 switches charging targets from first power storage unit 4-1 and second power storage unit 4-2 when SOC1 of first power storage unit 4-1 reaches a predetermined SOC upper limit value. Switching to the second power storage unit 4-2.
  • the current command generation unit 62 Upon receiving a signal indicating the power storage unit selected as the charging target from the power storage unit switching unit 60, the current command generation unit 62 performs the power storage units 4-1, 4-4- by a method described later based on the battery voltages Vbat1, Vbat2. 2, current target values Ibat1 * and Ibat2 * , which are target values of the charging current, are determined. Further, the current command generation unit 62 generates a charging current command Ich * and outputs it to the charging unit 30.
  • the drive signal generator 64 When the drive signal generator 64 receives the current target value Ibat1 * from the current command generator 62, the drive signal generator 64 performs the switching command PWC1 by feedback control based on the current deviation between the current target value Ibat1 * and the battery current Ibat1 from the current sensor 10-1. Is output to the first converter 6-1.
  • the drive signal generator 64 receives the current target value Ibat2 * from the current command generator 62, the drive signal generator 64 performs switching by feedback control based on a current deviation between the current target value Ibat2 * and the battery current Ibat2 from the current sensor 10-2.
  • Command PWC2 is generated and output to second converter 6-2.
  • FIG. 4 is a diagram illustrating an example of temporal changes in battery voltage, SOC, and battery current of power storage units 4-1, 4-2 during execution of external charging.
  • power storage unit switching unit 60 when charging is possible by an external power source at time t ⁇ b> 0, power storage unit switching unit 60 first selects a power storage unit to be charged by the method described above. In FIG. 4, it is assumed that the first power storage unit 4-1 is selected as the charging target.
  • the current command generator 62 determines the current target value Ibat1 * of the first power storage unit 4-1 to be charged. Specifically, the current command generation unit 62 sets the maximum output power of the charging unit 30 (the maximum value of power allowed to be output by the charging unit 30) Pch_max as the target of the charging power for the first power storage unit 4-1.
  • a target current value Ibat * of the first power storage unit 4-1 is determined by dividing the charging power target value Pch_max by the battery voltage Vbat1.
  • the current target value Ibat1 * is determined to be a predetermined current value I1.
  • the current command generation unit 62 determines the charging current command Ich * as a predetermined current value I1 and outputs it to the charging unit 30.
  • FIG. 5 shows power transfer when the first power storage unit 4-1 is a charging target.
  • first power storage unit 4-1 With the charging current from charging unit 30, as shown in FIG. 4, SOC1 (corresponding to line k3) and battery voltage Vbat1 (corresponding to line k1) ) Both increase.
  • battery voltage Vbat1 reaches upper limit voltage value VL at time t1, power storage unit switching unit 60 switches charging targets from first power storage unit 4-1, first power storage unit 4-1, and second power storage unit 4- Switch to 2. Thereby, after time t1, external charging of first power storage unit 4-1 and external charging of second power storage unit 4-2 are performed in parallel.
  • current command generation unit 62 determines current target value Ibat1 * of first power storage unit 4-1, so that battery voltage Vbat1 does not exceed upper limit voltage value VL. Specifically, the current command generation unit 62 divides the predetermined output power Pch1 set in advance so as to be lower than the maximum output power Pch_max of the charging unit 30 by the battery voltage Vbat1, thereby the first power storage unit 4-1. Current target value Ibat1 * is determined. In FIG. 4, the current target value Ibat1 * is determined to be a predetermined current value I2.
  • Current target value Ibat2 * is determined. In FIG. 4, the current target value Ibat2 * is determined to be a predetermined current value I3.
  • FIG. 6 shows power transfer when first power storage unit 4-1 and second power storage unit 4-2 are charged.
  • the voltage conversion operation is performed as described above. That is, first converter 6-1 performs a boosting operation using current value I3 as a current target value.
  • second converter 6-2 performs a step-down operation so that a current value substantially the same as the current value flowing through first converter 6-1 is supplied to second power storage unit 4-2.
  • a part of the charging power (maximum output power Pch_max) from the charging unit 30 is supplied to the first power storage unit 4-1 in a range where the battery voltage Vbat1 does not reach the upper limit voltage value VL, and the remaining power Electric power is supplied to the second power storage unit 4-2.
  • the first power storage unit 4-1 externally charges the first power storage unit 4-1 and the second power storage unit 4-2 in parallel with the charging current from the charging unit 30, so that the battery voltage Vbat1 Is suppressed below the upper limit voltage value VL, while SOC1 increases.
  • SOC1 reaches SOC upper limit SH at time t2
  • the first power storage unit is switched by switching the charging target from first power storage unit 4-1 and second power storage unit 4-2 to second power storage unit 4-2. 4-1 external charging ends.
  • all the charging power (maximum output power Pch_max) from charging unit 30 is supplied to second power storage unit 4-1.
  • the drive signal generator 64 controls the voltage conversion operations of the first converter 6-1 and the second converter 6-2. That is, first converter 6-1 performs a boosting operation using current value I1 as a current target value.
  • second converter 6-2 performs a step-down operation so that a current value substantially the same as the current value flowing through first converter 6-1 is supplied to second power storage unit 4-2.
  • current command generation unit 62 sets current target value Ibat2 * of second power storage unit 4-2 to battery voltage Vbat2 equal to or higher than upper limit voltage value VL. Decide not to be. Specifically, the current command generation unit 62 divides the predetermined output power Pch1 set in advance so as to be lower than the maximum output power Pch_max of the charging unit 30 by the battery voltage Vbat2, thereby the second power storage unit 4-2. Current target value Ibat2 * is determined. In FIG. 4, the current target value Ibat2 * is determined to be a predetermined current value I2.
  • battery voltage Vbat2 is suppressed to less than upper limit voltage value VL, while SOC2 increases.
  • SOC2 reaches SOC upper limit value SH at time t4
  • power storage unit switching unit 60 switches the charging target from second power storage unit 4-2 to the non-selected state, so that external power storage unit 4-2 Stop charging.
  • the power storage units 4-1, 4-2 By performing external charging of the second power storage unit 4-2 in parallel using the remaining power obtained by subtracting the charging power for the first power storage unit 4-1 from the power, the power storage units 4-1, 4-2 It is possible to reduce the execution time of external charging as compared with a configuration in which the charging is individually performed.
  • FIG. 7 is a diagram illustrating an example of temporal changes in battery voltage and SOC of power storage units 4-1 and 4-2 during execution of external charging at a low temperature.
  • section a where external charging of first power storage unit 4-1 is performed is relatively shorter than section a at normal temperature in FIG. This is because the battery voltage Vbat is expressed by the sum of the electromotive voltage and the voltage drop in the internal resistance, and the internal resistance of the power storage unit is higher at low temperatures than at normal temperatures.
  • section b until the SOC1 of the first power storage unit 4-1 reaches the SOC upper limit SH is relatively longer than that at room temperature.
  • section b due to the high internal resistance, the limit on the charging current Ibat1 to the first power storage unit 4-1 is strengthened to keep the battery voltage Vbat1 below the upper limit voltage value VL. It is further increased than time.
  • the vehicle 100 even if the vehicle 100 is in a system activation state by being given an ignition-on command by the driver's operation in the middle of the section b, the vehicle has a high discharge capability in the entire power supply system.
  • the traveling distance in EV traveling at 100 can be extended.
  • the contribution of the hybrid vehicle having the external charging function to the improvement of fuel consumption and environmental protection can be maintained.
  • control device 2 corresponds to the “control device”
  • converter control unit 54 corresponds to the “charge control unit”
  • SOC 1 The calculation unit 50 and the SOC2 calculation unit 52 correspond to a “state estimation unit”.
  • FIG. 8 is a flowchart showing a processing procedure of external charging according to the embodiment of the present invention. Note that the processing of each step shown in FIG. 8 is realized by the control device 2 (FIG. 1) functioning as each control block shown in FIGS. 2 and 3.
  • control device 2 determines whether or not vehicle 100 is in a stopped state (IG off state) (step S01). If vehicle 100 is not in a stopped state (IG off state) (NO in step S01), the process returns to the beginning.
  • control device 2 determines whether connector unit 350 is connected to vehicle 100 (step S01). S02). If connector unit 350 is not connected to vehicle 100 (NO in step S02), the process returns to the beginning.
  • control device 2 first selects the charging target based on the external charging execution history read from storage unit 66. Is selected (step S03). In the following processing procedure, it is assumed that the first power storage unit 4-1 is selected as a charging target.
  • control device 2 starts external charging of the first power storage unit 4-1 to be charged.
  • control device 2 controls converters 6-1 and 6-2 such that first power storage unit 4-1 is charged with a charging current (for example, predetermined value I1) from charging unit 30 (step S04). ).
  • a charging current for example, predetermined value I1
  • control device 2 determines whether or not the battery voltage Vbat1 detected by the voltage sensor 12-1 is equal to or higher than the upper limit voltage value VL (step S05). If battery voltage Vbat1 is lower than upper limit voltage value VL (NO in step S05), the process returns to step S04.
  • control device 2 determines that SOC1 of first power storage unit 4-1 is equal to or higher than SOC upper limit value SH. Whether or not (step S06).
  • control device 2 charges first power storage unit 4-1 with a charging current (for example, predetermined value I2) from charging unit 30 (step S16).
  • a charging current for example, predetermined value I2
  • step S07 When SOC1 falls below SOC upper limit value SH (NO in step S06), control device 2 charges first power storage unit 4-1 with a charging current (for example, predetermined value I2) from charging unit 30 (step S16).
  • step S07 When SOC1 falls below SOC upper limit value SH (NO in step S06), control device 2 charges first power storage unit 4-1 with a charging current (for example, predetermined value I2) from charging unit 30 (step S16).
  • step S07 When SOC1 falls below SOC upper limit value SH (NO in step S06), control device 2 charges first power storage unit 4-1 with a charging current (for example, predetermined value I2) from charging unit 30 (step S16).
  • step S07 When SOC1 falls below SOC upper limit value SH (NO in step S06), control device 2 charges first power storage unit 4-1 with
  • a charging current for example, predetermined value I1
  • control device 2 determines whether or not the battery voltage Vbat2 detected by the voltage sensor 12-2 is equal to or higher than the upper limit voltage value VL (step S11). If battery voltage Vbat2 is lower than upper limit voltage value VL (NO in step S11), the process returns to step S09.
  • controller 2 further determines that SOC2 of second power storage unit 4-2 is equal to or higher than SOC upper limit value SH. Whether or not (step S12).
  • SOC2 falls below SOC upper limit SH (NO in step S12)
  • control device 2 controls converters 6-1 and 6-2 such that second power storage unit 4-2 is charged with charging current I2. (Step S13), and the process returns to Step S11.
  • control device 2 completes external charging of second power storage unit 4-2, and thereby controls all power storage units.
  • step S14 the processing related to the external charging ends.
  • the vehicle 100 including the two power storage units 4-1 and 4-2 is illustrated as a representative example of the vehicle including a plurality of power storage units. It is obvious that the present invention can be applied to a vehicle having a section. In this case, external charging of the third power storage unit is started in section d shown in FIG.
  • the embodiment of the present invention when charging is possible with an external power supply, external charging to one power storage unit selected from a plurality of power storage units is started, and the power storage When the battery voltage of the unit reaches a predetermined upper limit voltage value, external charging is performed in parallel to the power storage unit and one power storage unit selected from the remaining power storage units. Therefore, even if a plurality of power storage units are in a low temperature state, the allowable discharge power of the entire power supply system can be quickly increased.
  • the charging efficiency of each power storage unit is reduced at low temperatures. Even if it exists, the execution time of the external charge with respect to all the electrical storage parts can be shortened.
  • the present invention can be applied to a power supply system including a plurality of chargeable / dischargeable power storage units and a hybrid vehicle including the power supply system.

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Abstract

Véhicule, comprenant une pluralité de blocs-batteries embarqués susceptibles d’être chargés par une source d’énergie externe, le véhicule comprenant un module de commande qui déclenche la charge externe d’un premier bloc-batterie parmi les blocs-batteries lorsque la charge par la source d’énergie externe devient possible (instant t0).  Lorsque la tension de batterie Vbat1 du premier bloc-batterie atteint une valeur de tension limite supérieure prédéfinie VL (instant t1), le module de commande limite un courant de charge Ibat1 appliqué au premier bloc-batterie de manière à maintenir la tension de batterie Vbat1 en deça de la valeur de tension limite supérieure VL, et poursuivre ainsi la charge externe du premier bloc-batterie tout en assurant la charge externe d’un deuxième bloc-batterie par la puissance de charge résiduelle obtenue par soustraction de la puissance de charge du premier bloc-batterie de celle fournie par un module de charge.
PCT/JP2008/071522 2008-11-27 2008-11-27 Système source d’énergie, véhicule hybride, et procédé de commande de la charge du système source d’énergie WO2010061449A1 (fr)

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WO2012004846A1 (fr) * 2010-07-05 2012-01-12 トヨタ自動車株式会社 Dispositif et procédé de commande pour automobile
WO2015097527A1 (fr) * 2013-12-25 2015-07-02 Toyota Jidosha Kabushiki Kaisha Système d'alimentation à batteries multiples

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WO2012004846A1 (fr) * 2010-07-05 2012-01-12 トヨタ自動車株式会社 Dispositif et procédé de commande pour automobile
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CN105848960A (zh) * 2013-12-25 2016-08-10 丰田自动车株式会社 具有多电池的电源系统
CN105848960B (zh) * 2013-12-25 2018-06-12 丰田自动车株式会社 电源系统

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