WO2014196121A1 - 充放電装置 - Google Patents
充放電装置 Download PDFInfo
- Publication number
- WO2014196121A1 WO2014196121A1 PCT/JP2014/002253 JP2014002253W WO2014196121A1 WO 2014196121 A1 WO2014196121 A1 WO 2014196121A1 JP 2014002253 W JP2014002253 W JP 2014002253W WO 2014196121 A1 WO2014196121 A1 WO 2014196121A1
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- WIPO (PCT)
- Prior art keywords
- voltage
- secondary battery
- charging
- control circuit
- converter
- Prior art date
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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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
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
- B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/40—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries adapted for charging from various sources, e.g. AC, DC or multivoltage
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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
- 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
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
- H02J7/0049—Detection of fully charged condition
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
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- 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
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- 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
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- 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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
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- 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
- Y02T90/12—Electric charging stations
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- 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 charge / discharge device capable of charging and discharging a secondary battery.
- Patent Document 1 discloses a charging system in which an electric vehicle that accumulates electric power receives emergency power from another electric vehicle when the electric power becomes insufficient during use.
- FIG. 14 is a configuration diagram of a conventional charging system 501 described in Patent Document 1.
- the charging system 501 includes electric vehicles 101 and 103 and an emergency charging cable 125.
- Each of the electric vehicles 101 and 103 includes a battery 105, a control unit 107, a positive contactor 109, a precharge contactor 111, a precharge resistor 113, a negative contactor 115, and a connection port 123.
- the connection port 123 has terminals 117, 119, and 121.
- the positive side contactor 109, the precharge contactor 111, and the negative side contactor 115 are controlled to be switched on and off by the control unit 107. Further, the control unit 107 is connected to the terminal 121 of the connection port 123. The connectors 127 and 129 of the emergency charging cable 125 are connected to the respective connection ports 123 so that the control unit 107 and the control unit of the emergency charging cable 125 can communicate with each other.
- Each of the electric vehicles 101 and 103 may include an on-board charger 131.
- the on-board charger 131 can convert alternating current obtained from the alternating current power supply into direct current and supply a charging current to the battery 105.
- the emergency charging cable 125 includes a power feeding cable 135, a power receiving cable 137, and a control box 139.
- the control box 139 stores a step-up / down circuit and a control unit.
- the control unit of control box 139 compares the magnitude relationship between battery 105 charging rate SOC1 on the power feeding side of electric vehicle 101 and battery 105 charging rate SOC2 on the power receiving side of electric vehicle 103.
- the control unit of the control box 139 determines that the connection for charging the battery 105 of the electric vehicle 103 with the battery 105 of the electric vehicle 101 is an erroneous connection.
- the control unit 107 When the charging rate SOC1 is larger than the charging rate SOC2, the control unit 107 first turns on the precharge contactor 111 and the negative electrode side contactor 115. By inserting the precharge resistor 113, a large current is prevented from flowing due to an inrush current immediately after connection. Thereafter, the positive contactor 109 is turned on and the precharge contactor 111 is turned off. Thus, “inter-vehicle charging”, which is charging / discharging between the batteries 105 of the electric vehicles 101 and 103, is started.
- Patent Document 1 describes that when power is insufficient during use of the vehicle 101 in the charging system 501, power can be received from another electric vehicle 103 in an emergency.
- precharge contactor 111 When charging system 501 starts inter-vehicle charging, precharge contactor 111 is in the ON state at the start of inter-vehicle charging, and therefore a large current flows between the vehicles. Therefore, a thick cable corresponding to a large current is required for the power feeding cable 135 and the power receiving cable 137, and the emergency charging cable 125 becomes heavy. Therefore, if the emergency charging cable 125 is mounted on, for example, the electric vehicle 101 and traveled, the efficiency may be reduced by the weight of the emergency charging cable 125, and the travel distance may be shortened. Furthermore, since the step-up / down circuit for controlling electric power is independently provided in the control box 139 of the emergency charging cable 125, the entire configuration of the emergency charging cable 125 becomes complicated.
- the charging / discharging device includes a DC / DC converter configured to be electrically connected to the secondary battery, an inverter electrically connected to the DC / DC converter, and a main charging electrically connected to the inverter.
- a terminal a voltage detection circuit that operates to detect the voltage of the main charging terminal, and a control circuit that is electrically connected to the DC / DC converter, the inverter, and the voltage detection circuit.
- the control circuit charges the secondary battery with the voltage input to the main charging terminal and the voltage detected by the voltage detection circuit is a DC voltage
- the inverter substantially converts the voltage directly into the DC / DC converter.
- the DC / DC converter charges the secondary battery, and the inverter functions as a DC voltage conversion circuit that converts the voltage and supplies the DC / DC converter to the secondary battery.
- the battery is operated so as to be switched according to the voltage.
- This charging / discharging device makes it possible to exchange power between the secondary batteries with a simple configuration and a lightweight charging cable.
- FIG. 1 is a block circuit diagram of a charge / discharge device according to Embodiment 1 of the present invention.
- FIG. 2 is a block circuit diagram of the charge / discharge device in the first embodiment.
- FIG. 3 is a flowchart showing the operation of the charge / discharge device in the first embodiment.
- FIG. 4A is a flowchart showing another operation of the charge / discharge device according to Embodiment 1.
- FIG. 4B is a flowchart showing still another operation of the charge / discharge device according to Embodiment 1.
- FIG. 4C is a flowchart showing still another operation of the charge / discharge device according to Embodiment 1.
- FIG. 5 is a block circuit diagram of the charge / discharge device according to Embodiment 2 of the present invention.
- FIG. 6 is a flowchart showing the operation of the charge / discharge device in the second embodiment.
- FIG. 7A is a flowchart showing another operation of the charge / discharge device according to Embodiment 2.
- FIG. 7B is a flowchart showing still another operation of the charge / discharge device according to Embodiment 2.
- FIG. 7C is a flowchart showing still another operation of the charge / discharge device according to Embodiment 2.
- FIG. 8 is a block circuit diagram of the charge / discharge device according to Embodiment 3 of the present invention.
- FIG. 9 is a flowchart showing the operation of the charge / discharge device in the third embodiment.
- FIG. 10A is a flowchart showing another operation of the charge / discharge device according to Embodiment 3.
- FIG. 10A is a flowchart showing another operation of the charge / discharge device according to Embodiment 3.
- FIG. 10A is a flowchart showing another operation of the charge / discharge device according to Embodi
- FIG. 10B is a flowchart showing still another operation of the charge / discharge device according to Embodiment 3.
- FIG. 10C is a flowchart showing still another operation of the charge / discharge device according to Embodiment 3.
- FIG. 11 is a block circuit diagram of the charge / discharge device according to Embodiment 4 of the present invention.
- FIG. 12A is a flowchart showing the operation of the charge / discharge device in the fourth embodiment.
- FIG. 12B is a flowchart showing the operation of the charge / discharge device according to Embodiment 4.
- FIG. 13A is a flowchart showing another operation of the charging / discharging device in the fourth embodiment.
- FIG. 13B is a flowchart showing another operation of the charge / discharge device according to Embodiment 4.
- FIG. 14 is a configuration diagram of a conventional charging system.
- FIG. 1 is a block circuit diagram of a charge / discharge device 11 according to Embodiment 1 of the present invention.
- the charging / discharging device 11 is mounted on an electric vehicle and is configured to be used with a secondary battery 13 mounted on a vehicle such as an electric vehicle.
- the charging / discharging device 11 charges the secondary battery 13 with AC power supplied from a commercial AC power supply 25.
- the charging / discharging device 11 includes a DC / DC converter 15 configured to be electrically connected to the secondary battery 13, an inverter 17 electrically connected to the DC / DC converter 15, and an inverter 17 electrically A main charging terminal 19 connected to the inverter 17, a voltage detection circuit 21 electrically connected to the inverter 17, and a control circuit 23.
- the control circuit 23 is electrically connected to the DC / DC converter 15, the inverter 17, and the voltage detection circuit 21.
- the control circuit 23 charges the secondary battery 13 from the main charging terminal 19, if the main charging terminal voltage Vo, which is the voltage of the main charging terminal 19 detected by the voltage detection circuit 21, is an AC voltage, the inverter 17 Control to function as a rectifier circuit.
- control circuit 23 controls the charging of the secondary battery 13 by the DC / DC converter 15.
- main charging terminal voltage Vo is a DC voltage
- control circuit 23 controls the inverter 17 to output the main charging terminal voltage Vo substantially as it is.
- control circuit 23 controls the charging of the secondary battery 13 by the DC / DC converter 15.
- the control circuit 23 controls the inverter 17 according to whether the main charging terminal voltage Vo is an alternating voltage or a direct current voltage, even if the electric power input from the main charging terminal 19 is direct current, it is alternating current. Even so, the secondary battery 13 can be charged.
- the circuit configuration for charging the secondary battery 13 from the commercial AC power supply 25 can be used as it is, and the secondary battery 13 can be charged by receiving DC power from another vehicle such as an electric vehicle. it can.
- the diverted circuit configuration prevents a large current from flowing and eliminates the need for a thick charging cable.
- the control circuit 23 can control charging of electric power from other vehicles, it is not necessary to provide a step-up / down circuit independently. From these things, the charging / discharging apparatus 11 which can interchange electric power between vehicles with a simple structure and a lightweight charging cable is obtained.
- the charging / discharging device 11 is configured to be mounted on a vehicle that is an electric vehicle.
- the charging / discharging device 11 is configured to be used with a secondary battery 13 that is mounted on a vehicle and stores electric power for driving the vehicle.
- the secondary battery 13 is made of, for example, a lithium ion battery, and is electrically connected to a motor that drives the vehicle. Therefore, the vehicle is driven by driving the motor with the electric power stored in the secondary battery 13.
- the secondary battery voltage Vb which is the voltage of the secondary battery 13 at the time of full charge, is about 130 V, which is close to the peak voltage (141 V) of the commercial AC power supply 25 having an effective voltage of 100 V.
- the effective voltage and peak voltage of the AC power supply 25 and the secondary battery voltage Vb when the secondary battery 13 is fully charged are not limited to the above voltages.
- the DC / DC converter 15 has ports 15A to 15D through which voltages are input and output, converts a DC voltage input between the ports 15A and 15B, and outputs the converted DC voltage from the ports 15C and 15D.
- the bidirectional DC / DC converter can convert the DC voltage input between the ports 15C and 15D and output the converted DC voltage from the ports 15A and 15B.
- the ports 15 ⁇ / b> A and 15 ⁇ / b> B of the DC / DC converter 15 are configured to be electrically connected to the secondary battery 13.
- the DC / DC converter 15 charges the secondary battery 13 with the power output from the ports 15A and 15B, and the secondary battery 13 is used when the power stored in the secondary battery 13 is used for purposes other than driving the vehicle.
- the secondary battery 13 is discharged by inputting the stored power to the ports 15A and 15B. Since the difference between the voltage of about 100V from the inverter 17 to the main charging terminal 19 via the main relay 18 and the secondary battery voltage Vb at the time of discharging is large, the DC / DC converter is not connected directly to the both.
- Reference numeral 15 denotes an insulation type DC / DC converter in which the ports 15A and 15B are insulated from the ports 15C and 15D.
- the main relay 18 is provided to prevent the power from the secondary battery 13 from being inadvertently output from the main charging terminal 19 when nothing is connected to the main charging terminal 19.
- the smoothing capacitor 27 and the inverter 17 are electrically connected to the ports 15C and 15D to which the secondary battery 13 of the DC / DC converter 15 is not connected.
- the inverter 17 is configured by a bridge circuit including switching elements 29, 31, 33, and 35 that are bridge-connected.
- the switching element 29 is connected in series between the connection points 17A and 17C.
- the switching element 31 is connected in series between the connection points 17B and 17C.
- the switching element 33 is connected in series between the connection points 17A and 17D.
- the switching element 35 is connected in series between the connection points 17B and 17D.
- the switching elements 29 and 31 are connected in series with each other at the connection point 17C.
- the switching elements 29 and 33 are connected in series with each other at the connection point 17A.
- the switching elements 31 and 35 are connected in series with each other at the connection point 17B.
- the switching elements 33 and 35 are connected in series with each other at the connection point 17D.
- These switching elements are composed of semiconductor switching elements such as field effect transistors, for example, and have switches and parasitic diodes connected in parallel to each other.
- the switching element 29 includes a switch 29S and a parasitic diode 29D connected in parallel with the switch 29S.
- the switching element 31 includes a switch 31S and a parasitic diode 31D connected in parallel with the switch 31S.
- the switching element 33 includes a switch 33S and a parasitic diode 33D connected in parallel with the switch 33S.
- the switching element 35 includes a switch 35S and a parasitic diode 35D connected in parallel with the switch 35S.
- the anode and cathode of the parasitic diode 29D are connected to the connection point 17C and the connection point 17A, respectively.
- the anode and cathode of the parasitic diode 31D are connected to the connection point 17B and the connection point 17C, respectively.
- the anode and cathode of the parasitic diode 33D are connected to the connection point 17D and the connection point 17A, respectively.
- the anode and cathode of the parasitic diode 35D are connected to the connection point 17B and the connection point 17D, respectively.
- connection points 17A and 17B are connected to ports 15C and 15D of DC / DC converter 15, respectively.
- the smoothing capacitor 27 is connected between the connection points 17A and 17B.
- the control circuit 23 can turn on and off the switches 29S, 31S, 33S, and 35S by the switch signal SW1.
- turning on and off the switching elements 29, 31, 33, and 35 is defined as turning on and off the switches 29S, 31S, 33S, and 35S.
- the inverter 17 charges all of the switching elements 29, 31, 33, and 35 when charging the secondary battery 13 with a commercial AC power supply 25 (AC 100 V) connected to the main charging terminal 19. When turned off, it operates as a rectifier circuit.
- the inverter 17 operates as follows when the electric power stored in the secondary battery 13 is used other than driving the vehicle.
- the control circuit 23 sets the switching elements 29 and 35 with the switch signal SW1. And a set of switching elements 31 and 33 are alternately turned on and off at the frequency of the AC power supply 25. As a result, a rectangular wave voltage is generated between the connection points 17C and 17D of the inverter 17.
- a filter circuit 37 is connected to connection points 17C and 17D of the inverter 17. A rectangular wave voltage generated between the connection points 17C and 17D of the inverter 17 is converted into an AC voltage having a sine AC waveform by the filter circuit 37 and output from the main charging terminal 19.
- the filter circuit 37 includes an inductor 37L and a capacitor.
- the charging / discharging device 11 operates as follows.
- the DC / DC converter 15 generates a desired DC voltage from the power stored in the secondary battery 13 between the ports 15C and 15D.
- the control circuit 23 turns on the switching elements 29 and 35 of the inverter 17 and turns off the switching elements 31 and 33. As a result, a desired DC voltage can be output from the main charging terminal 19.
- the AC power supply 25 is connected to the main charging terminal 19.
- This charging by a general commercial AC power supply 25 is defined as normal charging.
- the charging / discharging device 11 in the first embodiment can perform quick charging in which the secondary battery 13 is directly charged without going through the inverter 17 or the DC / DC converter 15.
- the charging / discharging device 11 of the first embodiment includes a sub-charging terminal 39.
- the sub charging terminal 39 is directly electrically connected to the secondary battery 13 via the sub relay 41. That is, the sub relay 41 is directly connected to the secondary battery 13, and the sub charge terminal 39 is directly connected to the sub relay 41.
- a quick charger outside the vehicle is connected to the auxiliary charging terminal 39, and power is supplied from the quick charger to the secondary battery 13 to perform quick charging.
- the quick charger passes a large current to quickly charge the secondary battery 13. Therefore, a thick wiring corresponding to a large current is used in the path from the sub charging terminal 39 to the secondary battery 13 via the sub relay 41.
- a voltage detection circuit 21 is electrically connected to the main charging terminal 19 in order to detect the main charging terminal voltage Vo.
- the voltage detection circuit 21 can determine whether the main charging terminal voltage Vo is a DC voltage or an AC voltage.
- the voltage detection circuit 21 outputs the voltage value as the main charging terminal voltage Vo if the main charging terminal voltage Vo is a DC voltage, and if the main charging terminal voltage Vo is an AC voltage, the effective value is output as the main charging terminal voltage Vo. Output as.
- the main charging terminal voltage Vo is an AC voltage
- the AC voltage value is not an effective value but may be another value corresponding to the AC voltage such as a peak value.
- the main charging terminal 19 has contacts 19A and 19B.
- the main charging terminal voltage Vo is a voltage between the contacts 19A and 19B.
- the main charging terminal voltage Vo is defined as positive when the potential of the contact 19A is higher than the potential of the contact 19B, and the main charging terminal voltage Vo is negative when the potential of the contact 19A is lower than the potential of the contact 19B. It is defined as When the main charging terminal voltage Vo is a DC voltage, the voltage detection circuit 21 can determine the polarity of the main charging terminal voltage Vo, that is, whether the main charging terminal voltage Vo is positive or negative.
- the switching elements 29, 31, 33, 35 of the DC / DC converter 15 and the inverter 17, the main relay 18, the sub relay 41, and the voltage detection circuit 21 are electrically connected to the control circuit 23.
- the control circuit 23 includes a microcomputer and a peripheral circuit including a memory.
- the control circuit 23 takes in the main charging terminal voltage Vo, and turns on / off the switching elements 29, 31, 33, and 35 of the inverter 17 by the switch signal SW1. Control. Further, the control circuit 23 controls the on / off operation of the main relay 18 by the main relay signal Rt1. In addition, the control circuit 23 also controls the on / off operation of the sub relay 41 by the sub relay signal R1.
- the control circuit 23 controls the DC / DC converter 15 with the control signal CNT1 and takes in the secondary battery voltage Vb, which is the voltage of the secondary battery 13, with the control signal CNT1 through the DC / DC converter 15.
- the antenna 43 is electrically connected to the control circuit 23.
- the control circuit 23 can communicate wirelessly with other charging / discharging devices connected to other secondary batteries via the antenna 43.
- the control circuit 23 can wirelessly transmit the data signal DAT1 to another control circuit of another charge / discharge device.
- the control circuit 23 can receive other data signals wirelessly from other control circuits.
- the control circuit 23 and other control circuits perform wireless communication between them, so that the state of the secondary battery 13 and other secondary batteries and the operation state of the charge / discharge device 11 and other charge / discharge devices Can be detected. Further, by performing communication between the charge / discharge device 11 and another charge / discharge device by wireless communication, communication wiring between the charge / discharge device 11 and the other charge / discharge device is not required, and the configuration is simplified.
- communication between the charging / discharging device 11 and another charging / discharging device is not limited to wireless communication, and the following operation can be performed using independent communication wiring. Moreover, you may use the communication via a power supply line, without using an independent communication wiring. In this case, the signal may be separated by, for example, the filter circuit 37 in order to separate the power and the communication signal.
- a commercial AC power supply 25 (AC 100 V, peak voltage 141 V) is connected to the main charging terminal 19.
- the control circuit 23 When an instruction to start charging is given to the control circuit 23 by a user operation, the control circuit 23 outputs a main relay signal Rt1 so as to turn on the main relay 18.
- the main relay 18 is turned on by the main relay signal Rt1, and the main charge terminal voltage Vo, which is the voltage of the main charge terminal, is applied to the voltage detection circuit 21.
- the voltage detection circuit 21 detects the main charging terminal voltage Vo, and controls the signal indicating whether the main charging terminal voltage Vo is a DC voltage or an AC voltage and a signal indicating the voltage value of the main charging terminal voltage Vo. To 23. Thereby, the control circuit 23 can detect that the main charging terminal voltage Vo taken in from the voltage detection circuit 21 is alternating current. As a result, the control circuit 23 controls the inverter 17 to function as a rectifier circuit. Specifically, the control circuit 23 outputs the switch signal SW1 so as to turn off all the switching elements 29, 31, 33, and 35. Thus, a bridge circuit is formed by the parasitic diodes 29D, 31D, 33D, and 35D of the switching elements 29, 31, 33, and 35, and the inverter 17 functions as a rectifier circuit.
- the voltage rectified and output by the inverter 17 functioning as a rectifier circuit is smoothed by the smoothing capacitor 27 and input to the DC / DC converter 15.
- the DC / DC converter 15 measures the secondary battery voltage Vb, which is the voltage of the secondary battery 13, and outputs the voltage value to the control circuit 23 by the control signal CNT1.
- the control circuit 23 feedback-controls the DC / DC converter 15 according to the secondary battery voltage Vb, and charges the secondary battery 13. Then, the control circuit 23 stops charging when the secondary battery voltage Vb reaches a predetermined full charge voltage.
- the secondary battery 13 is normally charged by the charging / discharging device 11.
- the quick charger When the quick charging connector extending from the aforementioned quick charger is connected to the sub charge terminal 39, the quick charger outputs a power transmission start signal wirelessly.
- the control circuit 23 When receiving the power transmission start signal as the data signal DAT1 by the antenna 43, the control circuit 23 turns on the sub relay 41. As a result, the quick charger and the secondary battery 13 are electrically connected directly.
- the control circuit 23 sends a data signal DAT1 to the quick charger that it is ready for charging.
- the quick charger starts supplying power to the secondary battery 13 and starts charging the secondary battery 13.
- the charging / discharging device 11 does not control charging of the secondary battery 13, and charging control is performed by the quick charger.
- the quick charger transmits to the control circuit 23 as a data signal DAT1 that the charging of the secondary battery 13 is completed.
- the control circuit 23 turns off the sub relay 41.
- the home appliance is connected to the main charging terminal 19 by the user.
- the control circuit 23 turns on the main relay 18 and the main charging terminal voltage Vo detected by the voltage detection circuit 21 is set.
- the DC / DC converter 15 is controlled to output a DC voltage between the ports 15C and 15D so that the AC voltage (for example, 100 V, 60 Hz) necessary for operating the home appliance is obtained.
- the control circuit 23 performs on / off control of the switching elements 29, 31, 33, and 35 of the inverter 17 by the switch signal SW1, and generates a rectangular wave voltage between the connection points 17C and 17D.
- the filter circuit 37 converts a rectangular wave voltage between the connection points 17 ⁇ / b> C and 17 ⁇ / b> D into a sine wave AC voltage and outputs the converted voltage from the main charging terminal 19.
- the secondary battery voltage Vb can be converted into an AC voltage and output from the main charging terminal 19.
- the control circuit 23 monitors the secondary battery voltage Vb to control the DC / DC converter 15 so that the secondary battery 13 is not overdischarged. Thereby, deterioration of the secondary battery 13 can be suppressed.
- an electronic device is connected to the main charging terminal 19 by the user.
- the control circuit 23 first turns on the main relay 18.
- the control circuit 23 outputs the switch signal SW1 so as to turn on the switching elements 29 and 35 of the inverter 17 and turn off the switching elements 31 and 33.
- the inverter 17 outputs the output voltage of the DC / DC converter 15 to the main charging terminal 19 substantially as it is.
- the control circuit 23 controls the DC / DC converter 15 so that the main charging terminal voltage Vo detected by the voltage detection circuit 21 becomes a direct current voltage necessary for operating the electronic device. By such an operation, the secondary battery voltage Vb can be converted into the DC voltage and output from the main charging terminal 19.
- control circuit 23 monitors the secondary battery voltage Vb and controls the secondary battery 13 so as not to be overdischarged. Thereby, deterioration of the secondary battery 13 can be suppressed.
- FIG. 2 is a circuit diagram of the charging / discharging device 11 connected to another charging / discharging device 51 mounted on another vehicle.
- the other charging / discharging device 51 mounted on another vehicle has the same configuration as the charging / discharging device 11. Specifically, the charging / discharging device 51 is configured so that another secondary battery 53 can be connected.
- the secondary battery 53 is made of, for example, a lithium ion battery, like the secondary battery 13, and is electrically connected to other motors of other vehicles. Note that the secondary battery voltage Vba, which is the voltage of the secondary battery 53, is about 200 V when fully charged, like the secondary battery voltage Vb.
- Other DC / DC converters 55 have a bi-directional insulation configuration, like the DC / DC converter 15, and have ports 55A to 55D.
- the ports 55 ⁇ / b> A and 55 ⁇ / b> B of the secondary battery 53 are configured to be electrically connected to the DC / DC converter 55.
- the inverter 57 includes switching elements 69, 71, 73, and 75 connected to form a bridge circuit.
- the inverter 57 operates in the same manner as the inverter 17.
- Another filter circuit 77 is connected to the inverter 57.
- the filter circuit 77 is composed of an inductor 77L and a capacitor.
- a main relay 58 is electrically connected between the filter circuit 77 and the main charging terminal 59.
- the main relay 58 has the same configuration as the main relay 18.
- the charging / discharging device 51 includes another sub-charging terminal 79 in order to quickly charge the secondary battery 53.
- the sub charging terminal 79 is configured to be directly electrically connected to the secondary battery 53 via the sub relay 81.
- a thick wiring corresponding to a large current is used for the path from the sub charging terminal 79 to the secondary battery 53 via the sub relay 81.
- another voltage detection circuit 61 is electrically connected to the main charging terminal 59 in order to detect the main charging terminal voltage Voa. Similarly to the voltage detection circuit 21, the voltage detection circuit 61 can determine whether the main charging terminal voltage Voa is a direct current or an alternating current. When the main charging terminal voltage Voa is a DC voltage, the polarity of the main charging terminal voltage Voa can be determined.
- the control circuit 63 includes a microcomputer and other peripheral circuits including a memory.
- the control circuit 63 takes in the main charging terminal voltage Voa and switches the switching elements 69, 71, The on / off operation of 73 and 75 is controlled. Further, the control circuit 63 controls the on / off operation of the main relay 58 by the main relay signal Rt2. In addition, the control circuit 63 also controls the on / off operation of the sub relay 81 by the sub relay signal R2.
- the control circuit 63 controls the DC / DC converter 55 by the control signal CNT2 and takes in the secondary battery voltage Vba of the secondary battery 53 by the control signal CNT2 through the DC / DC converter 55.
- the other antenna 83 is electrically connected to the control circuit 63. Therefore, the control circuit 63 can communicate with the control circuit 23 of the charging / discharging device 11 wirelessly via the antenna 83, for example. As a result, the control circuit 63 can wirelessly transmit the data signal DAT2 to the control circuit 23. Further, the control circuit 63 can receive the data signal DAT1 from the control circuit 23 wirelessly.
- the charging / discharging devices 11, 51 charge the secondary battery 13 with the power stored in the secondary battery 53 when the power stored in the secondary battery 13 is insufficient, and store it in the secondary battery 53.
- the secondary battery 53 can be charged with the electric power stored in the secondary battery 13 when the electric power used is insufficient. This operation is referred to as electric power accommodation in which electric power is accommodated between the charge / discharge devices 11 and 51.
- the charging / discharging device 51 operates in the same manner as the above-described operation of the charging / discharging device 11 except for power interchange with the charging / discharging device 11.
- the charging cable 85 is connected between the sub charging terminal 79 and the main charging terminal 19 by the user. At this stage, the power interchange has not been performed yet, so the DC / DC converter 15 is stopped.
- the charging cable 85 includes a connector shaped to fit with the sub-charging terminal 39 and a connector shaped to fit with the main charging terminal 19.
- Each connector has a structure in which the polarity is not connected in reverse, for example, a protrusion provided on a part of the connector. Note that, when power is interchanged between vehicles, normal charging is performed instead of rapid charging, and thus the charging cable 85 does not need to be a thick cable for rapid charging. Therefore, the charging cable 85 is reduced in weight, and even if this is loaded on the vehicle, it is possible to suppress a decrease in vehicle traveling efficiency compared to the case where a heavy cable is loaded.
- the user operates a switch that starts power interchange from another vehicle.
- This switch is connected to the control circuit 23.
- the control circuit 23 transmits the data signal DAT1 to the charging / discharging device 51 so as to turn on the sub relay 81 after turning off all the switching elements 29, 31, 33, and 35.
- the control circuit 63 turns on the sub relay 81.
- the secondary battery voltage Vba (DC voltage) of the secondary battery 53 is applied to the inverter 17.
- the control circuit 23 turns on the switching elements 29 and 35 while keeping the switching elements 31 and 33 off.
- the inverter 17 is controlled so as to output the secondary battery voltage Vba substantially as it is, so that the secondary battery voltage Vba is applied to the ports 15C and 15D of the DC / DC converter 15.
- the inverter 17 outputs the secondary battery voltage Vba (DC voltage) substantially as it is is that the DC voltage input to the inverter 17 is within the range of the voltage drop caused by the internal resistance or the like in the inverter 17. Is defined to be output as is.
- the control circuit 23 converts the secondary battery voltage Vba applied to the DC / DC converter 15 into a voltage for charging the secondary battery 13 and outputs the voltage.
- the control circuit 23 converts the secondary battery voltage Vba applied to the DC / DC converter 15 into a voltage for charging the secondary battery 13 and outputs the voltage.
- the control circuits 23 and 63 monitor the charging rates SOC1 and SOC2 of the secondary batteries 13 and 53, respectively, during power interchange. At the same time, the control circuit 23 takes in the charge rate SOC2 of the secondary battery 53 monitored by the control circuit 63 by communication. Then, the control circuit 23 determines the end of the charging of the secondary battery 13 when necessary power interchange is completed based on the charging rates SOC1 and SOC2.
- the charging rate SOC1 of the secondary battery 13 is the ratio of the amount of electric power stored in the secondary battery 13 and usable to the total amount (capacity) of electric power that can be stored in the secondary battery 13. And expressed as a percentage.
- the control circuit 23 obtains the charging rate SOC1 based on the time integration of the charging / discharging current of the secondary battery 13.
- the control circuit 63 obtains the charging rate SOC2 of the secondary battery 53.
- the control circuit 23 can determine that the charging is completed, for example, under any of the following conditions (1) to (3).
- the user sets a power accommodation amount, which is the amount of power supplied from the secondary battery 53 (charge / discharge device 51) to the secondary battery 13 (charge / discharge device 11), and the secondary battery is the same as the power accommodation amount.
- the control circuit 23 determines that charging is complete.
- the control circuit 63 sets the amount of electric power (including a margin) that can travel from the current location of the other vehicle to the destination.
- the set power amount is left in the secondary battery 53, and the remaining power amount obtained by subtracting the set power amount from the power amount stored in the secondary battery 53 is supplied to the charge / discharge device 11 (secondary battery 13). If so, the control circuit 23 determines that charging is complete.
- Condition (3) A sufficient amount of power is stored in the secondary battery 53, and the control circuit 23 sets the amount of power (including margin) that the vehicle can travel from the current location to the destination. When supplied from the secondary battery 53 to the secondary battery 13, the control circuit 23 determines that the charging is completed.
- the condition for the control circuit 23 to determine the completion of charging is not limited to the above conditions (1) to (3), and other conditions may be applied.
- the charging / discharging devices 11 and 51 as described above operate at the end of charging as follows.
- the control circuit 23 obtains the charging rate SOC1 of the secondary battery 13.
- Control circuit 23 obtains another charging rate SOC ⁇ b> 2 of secondary battery 53 through communication with control circuit 63.
- Control circuit 23 determines whether or not charging of secondary battery 13 has been completed based on charging rates SOC1 and SOC2. As a result, overcharging of the secondary battery 13 to be charged and overdischarge of the secondary battery 53 can be avoided, and it is possible to avoid accommodating more power than necessary.
- the control circuit 23 determines the end of charging based on the charging rates SOC1 and SOC2.
- the present invention is not limited to this.
- the control circuit 23 may determine the end of charging based on the secondary battery voltages Vb and Vba.
- FIG. 3 is a flowchart of the operation of the charge / discharge device 11.
- a switch such as a main switch or an ignition switch that activates both the vehicle that receives power and the other vehicle that supplies power is turned on.
- both vehicles are set to a power interchange mode in which power is interchanged between the secondary batteries 13 and 53 (charge / discharge devices 11 and 51) by the user.
- 3 is a subroutine that is called from the main routine of the microcomputer built in the control circuit 23 and executed.
- control circuit 23 first turns off all the switching elements 29, 31, 33, and 35 of the inverter 17 (step S11).
- control circuit 23 turns on the main relay 18 and instructs the control circuit 63 of the charging / discharging device 51 to turn on the sub relay 81 (step S12). Specifically, the control circuit 23 outputs a main relay signal Rt1 for turning on the main relay 18 to the main relay 18 and transmits a data signal DAT1 for turning on the sub relay 81 to the charging / discharging device 51. Thereby, in the power interchange mode, the main relay 18 and the sub relay 81 are turned on, and the secondary battery voltage Vba of the secondary battery 53 is applied to the inverter 17.
- control circuit 63 of the charging / discharging device 51 ignores the data signal DAT1 transmitted by the operation of step S12, and the data signal DAT1. I do nothing even if I receive it.
- the control circuit 23 takes in the main charging terminal voltage Vo from the voltage detection circuit 21 (step S13), and determines whether or not the main charging terminal voltage Vo is an AC voltage (step S15). If the main charging terminal voltage Vo is an AC voltage in Step S15 (Yes in Step S15), the control circuit 23 performs the operations after Step S25 described later in order to charge the secondary battery 13 from the commercial AC power supply 25. Do. At this time, when an AC voltage having a voltage or frequency different from that of the commercial AC power supply 25 for charging the secondary battery 13 is applied, the control circuit 23 determines that the power is out of specification, A warning may be issued to the user. In the operation shown in FIG. 3, the control circuit 23 controls the DC / DC converter 15 so that the secondary battery 13 can be charged even if the AC voltage or frequency of the AC power supply 25 varies.
- Step S17 determines whether or not the main charging terminal voltage Vo is a DC voltage. If the main charging terminal voltage Vo is a DC voltage in step S17 (Yes in step S17), the control circuit 23 performs an operation after step S21 described later.
- Step S17 if the main charging terminal voltage Vo is not a DC voltage in Step S17 (No in Step S17), neither AC voltage nor DC voltage is applied to the main charging terminal 19, so the control circuit 23 applies to the main charging terminal 19. It is determined that the charging cable 85 is not connected, an unconnected signal is output to the user (step S19), the subroutine of FIG. 3 is terminated, and the process returns to the main routine. Thus, the user can confirm the connection state and perform the charging operation again.
- the control circuit 23 turns on the switching elements 29 and 35 while keeping the switching elements 31 and 33 off (step S21). As a result, the inverter 17 outputs the main charging terminal voltage Vo substantially as it is. As a result, the main charging terminal voltage Vo is applied to the ports 15C and 15D of the DC / DC converter 15, so that the control circuit 23 controls the DC / DC converter 15 so as to charge the secondary battery 13. (Step S25). As a result, the secondary battery 13 can be charged with DC power supplied from the main charging terminal 19.
- the DC power source connected to the main charging terminal 19 may be the other secondary battery 53 shown in FIG. 2, or a DC power source generated by a solar cell, for example, or a stationary type. The DC power source from the power storage unit may be used. In any case, the control circuit 23 controls the DC / DC converter 15 so as to charge the secondary battery 13.
- Step S15 when the AC power supply 25 is connected to the main charging terminal 19 and the main charging terminal voltage Vo is an AC voltage in Step S15 (Yes in Step S15), the control circuit 23 determines that the secondary battery 13 is in Step S25.
- the DC / DC converter 15 is controlled so as to be charged.
- the inverter 17 since the operation of step S21 is not performed and the switching elements 29, 31, 33, and 35 are kept off, the inverter 17 is a parasitic diode 29D of the switching elements 29, 31, 33, and 35 that are bridge-connected. , 31D, 33D, and 35D function as a rectifier circuit.
- AC power from the AC power supply 25 is rectified by the inverter 17, smoothed by the smoothing capacitor 27, and supplied to the ports 15 ⁇ / b> C and 15 ⁇ / b> D of the DC / DC converter 15. Therefore, the secondary battery 13 can be charged with AC power from the AC power supply 25.
- the control circuit 23 can automatically charge the secondary battery 13 under optimum conditions, and the user can easily charge the secondary battery 13 including power interchange. .
- the charging / discharging device 11 operates as follows according to the flowchart shown in FIG.
- the control circuit 23 charges the secondary battery 13 from the main charging terminal 19 and the main charging terminal voltage Vo of the main charging terminal 19 detected by the voltage detection circuit 21 is an AC voltage
- the inverter 17 serves as a rectifier circuit. After controlling to function, charging of the secondary battery 13 is controlled by the DC / DC converter 15. Further, if the main charging terminal voltage Vo is a direct current voltage, the control circuit 23 controls the inverter 17 to output the direct current voltage as it is, and then charges the secondary battery 13 by the DC / DC converter 15. To control.
- the charging end operation is as described above.
- the control circuit 23 controls the inverter 17 to function as a rectifier circuit, but controls the inverter 17 to function as a power factor correction circuit. May be. That is, when the main charging terminal voltage Vo is converted into direct current by the rectifier circuit, a pulsating current is applied to the smoothing capacitor 27. In order to reduce fluctuations in the pulsating voltage, a large-capacity smoothing capacitor 27 is required, and the charge / discharge device 11 is increased in size.
- the control circuit 23 controls the switching elements 29, 31, 33, and 35 to perform the switching operation so that the inverter 17 functions as a power factor correction circuit together with the inductor 37L of the filter circuit 37.
- the smoothing capacitor 27 is not increased in size.
- the voltage input to the DC / DC converter 15 can be stabilized without adding another circuit, and further, the harmonics can be achieved. Wave suppression is also possible.
- the control circuit 23 may cause the inverter 17 to function as a rectifier circuit instead of a power factor correction circuit.
- the inverter 17 is controlled so as to output the DC voltage substantially as it is. It may be controlled to function as a DC voltage conversion circuit together with the inductor 37L of the circuit 37.
- the DC / DC converter 15 steps down the voltage of the smoothing capacitor 27, which is the voltage input to the ports 15C and 15D, and charges the secondary battery 13. Therefore, the voltage of the smoothing capacitor 27 needs to be higher than the secondary battery voltage Vb.
- the fully charged voltage (about 130 V) of the secondary battery voltage Vb is close to the peak voltage (141 V) of the AC power supply 25. Since the full charge voltage is slightly lower than the peak voltage, the DC / DC converter 15 may fully reduce the voltage of the smoothing capacitor 27 (about 141 V) without boosting the secondary battery 13. it can.
- the bidirectional DC / DC converter 15 steps down the DC voltage applied between the ports 15C and 15D and outputs it between the ports 15A and 15B, and boosts the DC voltage applied between the ports 15A and 15B. It can be output between the ports 15C and 15D.
- the level relationship between the voltage between the ports 15C and 15D and the voltage between the ports 15A and 15B is determined by the circuit configuration of the DC / DC converter 15, and cannot be easily changed by the on / off control of the switching elements of the DC / DC converter 15. That is, in the first embodiment, the DC / DC converter 15 boosts the DC voltage applied between the ports 15C and 15D and outputs the boosted voltage between the ports 15A and 15B, and the DC voltage applied between the ports 15A and 15B.
- the control circuit 23 switches the inverter 17 together with the inductor 37L of the filter circuit 37 to operate as a step-up DC / DC converter that is a DC voltage conversion circuit.
- control circuit 23 may control the inverter 17 to function as a boost converter.
- the control circuit 23 causes the inverter 17 to function as either a rectifier circuit or a power factor correction circuit.
- the control circuit 23 controls the inverter 17 so that the inverter 17 outputs the DC voltage substantially as it is, or the inverter 17 converts the DC voltage.
- the inverter 17 is controlled so as to function as a circuit.
- FIG. 4A is a flowchart showing the above-described operation of the charge / discharge device 11. Note that the flowchart of FIG. 4A is a subroutine executed from the main routine, similar to the flowchart shown in FIG. 4A, the same reference numerals are assigned to the same operations as those in the flowchart shown in FIG.
- control circuit 23 When the subroutine shown in FIG. 4A is executed, the control circuit 23 first performs operations from step S11 to step S15 as in the flowchart shown in FIG.
- Step S27 the control circuit 23 controls the inverter 17 to function as a power factor correction circuit (Step S27).
- step S27 specifically, as described above, the switching elements 29, 31, 33, and 35 of the inverter 17 are controlled to be repeatedly turned on and off, whereby the inverter 17 is powered using the inductor 37L of the filter circuit 37. It functions as a rate improvement circuit.
- the control circuit 23 performs the operation of step S25 as in the flowchart shown in FIG.
- Step S17 the control circuit 23 determines whether or not the main charging terminal voltage Vo is a DC voltage (Step S17).
- Step S17 When the main charging terminal voltage Vo is a DC voltage in Step S17 (Yes in Step S17), the control circuit 23 maintains the switching element 33 in the off state and maintains the switching element 35 in the on state in the switching element 29, 31 is alternately turned on and off at a predetermined cycle (step S29).
- the inverter 17 boosts the main charging terminal voltage Vo and applies it across both ends of the smoothing capacitor 27, that is, between the ports 15C and 15D of the DC / DC converter 15. Function as.
- the voltage of the smoothing capacitor 27 can be set to a value suitable for the input voltage of the DC / DC converter 15.
- the control circuit 23 performs the operation of step S25 as in the flowchart shown in FIG.
- step S17 when the main charging terminal voltage Vo is not a DC voltage (No in step S17), the control circuit 23 performs the operation in step S19 as in the flowchart shown in FIG.
- the control circuit 23 controls the inverter 17 so as to function as a DC voltage converting circuit (boost converter).
- the charging / discharging device 11 that charges and discharges the secondary battery 13 having a charging voltage can be realized.
- FIG. 4B is a flowchart of still another operation of the charge / discharge device 11. 4B, operations similar to those illustrated in FIGS. 3 and 4A are denoted by the same reference numerals.
- the control circuit 23 does not perform the operation of step S27 shown in FIG. 4A, and the control circuit 23 controls the inverter 17 to function as a rectifier circuit, similarly to the operation shown in FIG.
- FIG. 4C is a flowchart of still another operation of the charge / discharge device 11. 4C, operations similar to those illustrated in FIGS. 3 and 4A are denoted by the same reference numerals.
- the control circuit 23 performs the operation of step S27 illustrated in FIG. 4A, and performs the operation of step S21 illustrated in FIG. 3 instead of the operation of step S29.
- the circuit for charging the secondary battery 13 from the commercial AC power supply 25 can be diverted as it is, and DC power can be received from other electric vehicles as soon as possible.
- the circuit since the circuit is diverted, a large current does not flow and the charging cable 85 need not be thickened.
- the control circuit 23 can control charging of electric power from another electric vehicle, it is not necessary to provide a separate step-up / step-down circuit separately. From these things, the charging / discharging apparatus 11 which can interchange electric power between electric vehicles is obtained with the lightweight charging cable 85 with a simple structure.
- the control circuits 23 and 63 operate only the DC / DC converter 15 of the DC / DC converter 15 of the charging / discharging device 11 and the DC / DC converter 55 of the charging / discharging device 51.
- the DC / DC converter 55 is not operated. By not operating one of the DC / DC converters 15 and 55, the power loss of the secondary battery 53 can be reduced.
- the control circuit 63 performs any one of the operations shown in FIGS. 3 and 4A to 4C.
- the inverter 17 when charging the secondary battery 13 with the power of the other secondary battery 53, the inverter 17 outputs the secondary battery voltage Vba (DC voltage) of the secondary battery 53 substantially as it is. To be controlled. At this time, the control circuit 23 turns on both the switching elements 29 and 35 in step 21, but only the switching element 35 may be turned on and the other switching elements 29, 31, and 33 may be turned off in step S21. In this case, a DC voltage is applied to the DC / DC converter 15 via the parasitic diode 29D even when the switching element 29 is OFF. In this operation, although the control of the switching element 29 becomes unnecessary, a loss occurs due to the parasitic diode 29D. Therefore, in step S21 shown in FIG. 3, it is desirable to turn on both the switching elements 29 and 35.
- Vba DC voltage
- the charging cable 85 when charging the secondary battery 13 with the electric power stored in the other secondary battery 53, the charging cable 85 is connected to the main charging terminal 19 of the charging / discharging device 11 and the auxiliary charging / discharging device 51. It is connected between the charging terminal 79.
- the charging cable 85 may be connected between the main charging terminal 19 of the charging / discharging device 11 and the main charging terminal 59 of the charging / discharging device 51.
- the charging / discharging device 11 when the charging / discharging device 11 includes the sub charging terminal 39, the charging cable 85 is connected to the main charging terminal 19 of the charging / discharging device 11 and the sub charging terminal of the charging / discharging device 51.
- the control circuits 23 and 63 are preferably connected to the charging terminal 79 to operate only the DC / DC converter 15 of the DC / DC converters 15 and 55 and not to operate the DC / DC converter 55. That is, the charging / discharging device 11 further includes a secondary charging terminal 39 that is electrically connected to the secondary battery 13 via the secondary relay 41.
- the other charging / discharging device 51 includes another sub charging terminal 79 that is electrically connected to the secondary battery 53 via another sub relay 81.
- the sub relay 41 is on / off controlled by the control circuit 23.
- the control circuit 23 performs an operation of charging the secondary battery 13 by the DC / DC converter 15.
- the secondary relay 41 is provided between the secondary battery 13 and the secondary charging terminal 39 so that the high secondary battery voltage Vb is not always applied to the secondary charging terminal 39. Yes.
- the control circuit 23 performs communication with another control circuit 63 that performs on / off control of the sub-relay 81, but this may not be performed.
- the communication is not performed, the user performs on / off of the sub-relays 41 and 81, the start and end operations of charging, and the like for power interchange between the vehicle and another vehicle.
- the operation by the user may be overcharged or overdischarged and the operation becomes complicated, a configuration in which the charge / discharge devices 11 and 51 are controlled by communication as in the first embodiment is desirable.
- FIG. 5 is a block circuit diagram at the time of DC power charging of charging / discharging devices 11 and 51 in the second embodiment.
- the same reference numerals are assigned to the same parts as those of the charge / discharge devices 11 and 51 shown in FIGS.
- the voltage detection circuit 21 of the charge / discharge device 11 has a function of distinguishing and outputting the polarity when the main charging terminal voltage Vo is a DC voltage.
- the control circuit 23 controls the inverter 17 so that a normal voltage is applied to the DC / DC converter 15 according to the polarity of the DC voltage. Accordingly, it is not necessary to distinguish the polarities in the charging cable 85, and therefore, a configuration in which a protrusion or the like is formed on the connector of the charging cable 85 for preventing reverse insertion is unnecessary, and thus a charging cable having a simpler configuration. 85 enables electric power to be interchanged between electric vehicles.
- the voltage detection circuit 21 when the main charging terminal voltage Vo is a DC voltage, the voltage detection circuit 21 outputs not only the voltage value of the DC voltage but also the polarity of the DC voltage. Therefore, the voltage detection circuit 21 in the second embodiment outputs a voltage value (effective value in the second embodiment) when the main charging terminal voltage Vo is an AC voltage, and the main charging terminal voltage Vo is a DC voltage. In this case, a voltage value including the sign of the DC voltage can be output.
- the positive electrode of the sub charging terminal 79 is the negative electrode of the main charging terminal 19, as shown by the broken line circle in FIG. 5. And the negative electrode of the sub charging terminal 79 is connected to the contact 19A which is the positive electrode of the main charging terminal 19.
- the positive electrode of the sub-charging terminal 79 is connected to the contact 19 ⁇ / b> A that is the positive electrode of the main charging terminal 19
- the negative electrode of the sub-charging terminal 79 is connected to the contact 19 ⁇ / b> B that is the negative electrode of the main charging terminal 19.
- the charging cable 85 is inserted into the main charging terminal 19 in the opposite direction to the circuit shown in FIG. 2. It is defined that the main charging terminal voltage Vo is positive when the potential of the contact 19A is higher than the potential of the contact 19B, and the main charging terminal voltage Vo is negative when the potential of the contact 19A is lower than the potential of the contact 19B.
- FIG. 6 is a flowchart showing the operation of the charging / discharging device 11 that charges the secondary battery 13 with the power of the other secondary battery 53 in this state.
- the same operations as those shown in FIGS. 3 and 4A to 4C are denoted by the same reference numerals.
- the flowchart shown in FIG. 6 is also a subroutine executed from the main routine, as in the first embodiment.
- step S11 When the subroutine shown in the flowchart shown in FIG. 6 is executed, the control circuit 23 performs the operations from step S11 to S15 as in the flowchart shown in FIG. If the charging terminal voltage Vo is an AC voltage in step S15 (Yes in step S15), the operation in step S25 is performed in the same manner as in the flowchart shown in FIG.
- Step S15 the control circuit 23 determines whether or not the main charging terminal voltage Vo is a positive DC voltage (Step S51). If the main charging terminal voltage Vo is a positive DC voltage (Yes in step S51), the charging / discharging device 11 performs the operations in steps S21 and S25 in the same manner as the operation shown in FIG.
- Step S53 determines whether or not the main charging terminal voltage Vo is a negative DC voltage. If the main charging terminal voltage Vo is a negative DC voltage in step S53 (Yes in step S53), the control circuit 23 keeps the switching elements 29 and 35 off and turns on the switching elements 31 and 33 ( Step S55).
- FIG. 5 shows the on / off state at step S55 in the switching elements 29, 31, 33, and 35 of the inverter 17.
- the charging cable 85 is inserted into the main charging terminal 19 in the opposite direction to that of FIG. 3 and connected to the contact 19 ⁇ / b> B that is the negative electrode of the main charging terminal 19, Since the switching element 33 is on and the switching element 35 is off, the contact 19B of the main charging terminal 19 is correctly connected to the port 15C of the DC / DC converter 15.
- the control circuit 23 controls the inverter 17 so that a normal voltage is applied to the DC / DC converter 15 according to the polarity of the main charging terminal voltage Vo. Control.
- the configuration of charging cable 85 can be further facilitated as compared with the first embodiment.
- step S53 when the main charging terminal voltage Vo is not a negative DC voltage in step S53 (No in step S53), the main charging terminal voltage Vo is neither an AC voltage nor a DC voltage, so that the control circuit 23 performs main charging. It is determined that the charging cable 85 is not connected to the terminal 19, and the operation in step S19 is performed similarly to the operation shown in FIG.
- the control circuit 23 controls the inverter 17 to function as a rectifier circuit. Similar to the first embodiment, the control circuit 23 may control the inverter 17 to function as a power factor correction circuit, thereby reducing the pulsation of the pulsating flow.
- FIG. 7A is a flowchart of another operation of charging / discharging devices 11 and 53 in the second embodiment.
- the same operations as those in FIG. 6 are denoted by the same reference numerals.
- step S15 when the main charging terminal voltage Vo is an AC voltage (Yes in step S15), the control circuit 23 controls the inverter 17 to function as a power factor correction circuit (step S27). This operation is the same as the operation in step S27 shown in FIG. 4A. Thereafter, the control circuit 23 performs the operation of step S25.
- the inverter 17 may be controlled to function as a DC voltage conversion circuit.
- the control circuit 23 determines whether or not the main charging terminal voltage Vo is a positive DC voltage (Step S51).
- Step S51 When the main charging terminal voltage Vo is a positive DC voltage in Step S51 (Yes in Step S51), the control circuit 23 maintains the switching element 33 in the off state and maintains the switching element 35 in the on state.
- the switching elements 29 and 31 are alternately turned on and off at a predetermined cycle (step S29).
- the inverter 17 boosts the main charging terminal voltage Vo and applies it across both ends of the smoothing capacitor 27, that is, between the ports 15C and 15D of the DC / DC converter 15. Function as. Thereafter, the control circuit 23 performs the operation of step S25.
- Step S53 determines whether or not the main charging terminal voltage Vo is a negative DC voltage (Step S53).
- step S53 When the main charging terminal voltage Vo is a negative DC voltage in step S53 (Yes in step S53), the control circuit 23 maintains the switching element 29 in the on state while maintaining the switching element 29 in the off state.
- the switching elements 33 and 35 are alternately turned on and off at a predetermined cycle (step S57).
- the inverter 17 boosts the main charging terminal voltage Vo and applies it across both ends of the smoothing capacitor 27, that is, between the ports 15C and 15D of the DC / DC converter 15. Function as. Thereafter, the control circuit 23 performs the operations after step S25.
- Step S53 when the main charging terminal voltage Vo is not a negative DC voltage (No in Step S53), the control circuit 23 performs the operation in Step S19.
- the charging / discharging device 11 capable of accommodating power between the electric vehicles is obtained by the charging cable 85 having a simpler configuration.
- FIG. 7B is a flowchart of still another operation of charging / discharging device 11 in the second exemplary embodiment.
- FIG. 7B operations similar to those shown in FIGS. 6 and 7A are denoted by the same reference numerals.
- the control circuit 23 does not perform the operation of step S27 shown in FIG. 7A, and the control circuit 23 controls the inverter 17 to function as a rectifier circuit, similarly to the operation shown in FIG.
- FIG. 7C is a flowchart of still another operation of the charge / discharge device 11 according to the second exemplary embodiment.
- FIG. 7C operations similar to those shown in FIGS. 6 and 7A are denoted by the same reference numerals.
- the control circuit 23 performs the operation of step S27 illustrated in FIG. 7A, and performs the operations of steps S21 and S55 illustrated in FIG. 6 in place of the operations of steps S29 and S57, respectively.
- FIG. 8 is a block circuit diagram when charging / discharging device 11 according to Embodiment 3 of the present invention is charged with DC power.
- Control circuits 23 and 63 of charging / discharging devices 11 and 51 in the third embodiment can obtain charging rates SOC1 and SOC2 of secondary batteries 13 and 53, respectively.
- the control circuit 23 can obtain the charging rate SOC ⁇ b> 2 of the secondary battery 53 through communication with the control circuit 63.
- the control circuit 23 controls the DC / DC converter 15 to charge another secondary battery 53 when the charging rate SOC1 is larger than the charging rate SOC2.
- the charging rate SOC ⁇ b> 1 of the secondary battery 13 is larger than the charging rate SOC ⁇ b> 2 of the secondary battery 53.
- power is supplied from the charging / discharging device 11 to the charging / discharging device 51.
- FIG. 9 is a flowchart of the power interchange operation of the charge / discharge devices 11 and 51 to which the charging cable 85 shown in FIG. 8 is connected. 9, the same reference numerals are given to the same operations as those shown in FIG. The flowchart shown in FIG. 9 is also a subroutine executed from the main routine, as in the first embodiment.
- Step S11 When the subroutine of the flowchart shown in FIG. 9 is executed, the operations in steps S11 to S19 are performed in the same manner as the operation shown in FIG.
- the charging terminal voltage Vo is an AC voltage in Step S15 (Yes in Step S15)
- the operation in Step S25 is performed in the same manner as the operation shown in FIG.
- step S15 when the charging terminal voltage Vo is not an AC voltage (No in step S15), it is determined whether or not the main charging terminal voltage Vo is a DC voltage (step S17). If the main charging terminal voltage Vo is a DC voltage in step S17 (Yes in step S17), the control circuit 23 takes in the charging rates SOC1 and SOC2 (step S61).
- the charging rates SOC1 and SOC2 are obtained as follows.
- the DC / DC converters 15 and 55 incorporate current sensors that detect currents flowing through the secondary batteries 13 and 53, respectively.
- the control circuit 23 obtains the output of the current sensor incorporated in the DC / DC converter 15 by the control signal CNT1, and periodically updates the charging rate SOC1 by integrating the output with time.
- the control circuit 63 takes in the output of the current sensor built in the DC / DC converter 55 by the control signal CNT2, and periodically updates the charging rate SOC2 by integrating the output with time.
- step S61 the control circuit 23 obtains and loads the charging rate SOC1.
- the control circuit 23 requests the control circuit 63 with the data signal DAT1 to transmit the charging rate SOC2 obtained by the control circuit 63 to the control circuit 23.
- the control circuit 63 receives the data signal DAT1, and the control circuit 63 transmits the charge rate SOC2 to the control circuit 23 as the data signal DAT2.
- the control circuit 13 takes in the charging rate SOC2 by receiving the data signal DAT2.
- the control circuits 23 and 63 obtain the charging rates SOC1 and SOC2, respectively, but the present invention is not limited to this.
- the microcomputer may determine the charging rate SOC1. With such a configuration, although a plurality of microcomputers are required, the calculation burden on the control circuit 23 is reduced.
- the microcomputer may obtain the charging rate SOC2.
- control circuit 23 turns on the switching elements 29 and 35 with the switching elements 31 and 33 kept off (step S21).
- control circuit 23 compares the charging rate SOC1 and the charging rate SOC2 (step S63). If the charging rate SOC1 is equal to or lower than the other charging rate SOC2 in step S63 (No in step S63), the secondary battery 13 is charged with the power supplied from the secondary battery 53 (step S25).
- step S63 when the charging rate SOC1 is larger than the other charging rate SOC2 in step S63 (Yes in step S63), the control circuit 23 supplies the power of the secondary battery 13 to the other secondary battery 53, i.e., 2
- the DC / DC converter 15 is controlled to discharge the secondary battery 13 (step S65).
- step S65 power from the secondary battery 13 is supplied between the ports 15A and 15B of the DC / DC converter 15, and the DC / DC converter 15 outputs power to charge the secondary battery 53 from the ports 15C and 15D. To do.
- the electric power output from the DC / DC converter 15 is supplied to the secondary battery 53 via the switching elements 29 and 35 of the inverter 17, the filter circuit 37, the main charging terminal 19, the charging cable 85, the auxiliary charging terminal 79 and the auxiliary relay 81.
- the supplied secondary battery 53 is charged.
- Such an operation of the DC / DC converter 15 can be realized because the DC / DC converter 15 is a bidirectional type. Thereafter, the subroutine of FIG. 9 is terminated and the process returns to the main routine.
- step S65 the control circuit 23 performs charge control of the secondary battery 53 instead of the control circuit 63. Details of this operation will be described.
- the control circuit 23 In order for the control circuit 23 to control the charging of another secondary battery 53 connected to another charging / discharging device 51, the secondary battery voltage Vba of the secondary battery 53, the charging rate SOC2, and the secondary battery 53 are controlled. A charging current flowing in the battery is required.
- the charging current flowing through the secondary battery 53 is substantially the same as the current flowing through the DC / DC converter 15 within an error range, and thus is obtained by a current sensor built in the DC / DC converter 15. Since the secondary battery voltage Vba is substantially the same as the main charging terminal voltage Vo within an error range, it can be obtained by the voltage detection circuit 21.
- the charge rate SOC2 of the secondary battery 53 is not directly determined by the control circuit 23.
- the control circuit 23 performs an operation for time integration of the output of the current sensor starting from the latest charge rate SOC2 obtained by the control circuit 63, and periodically updates and obtains the charge rate SOC2.
- the obtained charging rate SOC2 is also transmitted to the control circuit 63. In this way, the control circuit 23 can perform charging control of the secondary battery 53 based on the other charging rate SOC2.
- Such an operation is also performed in the first and second embodiments. That is, in the first embodiment, the other secondary battery 53 is discharged, but the charging rate SOC2 associated therewith is updated by the above-described operation.
- the degree of freedom of connection of the charging cable 85 is increased by performing the operation in step S65 (power is exchanged from the secondary battery 13 to another secondary battery 53). That is, the user is not conscious of the remaining power of the secondary batteries 13 and 53, and only connects the sub charging terminal 79 to the main charging terminal 19 with the charging cable 85. Power can be accommodated from a secondary battery having a large charge rate to a secondary battery having a small charge rate. Furthermore, by further determining the polarity of the main charging terminal voltage Vo in the second embodiment before step S21, there is no need to be aware of the connection direction of the connector of the charging cable 85, and the secondary operation can be performed with simpler handling. Power interchange between the batteries 13 and 53 becomes possible.
- the control circuit 23 performs the operation shown in FIG. If the main charging terminal voltage Vo is negative, the control circuit 23 turns off the switching elements 29 and 35 instead of keeping the switching elements 31 and 33 off and turning on the switching elements 29 and 35 in step S21. And switching elements 31 and 33 are turned on.
- the port 15C of the DC / DC converter 15 is connected to the positive electrode of the secondary battery 53 and the port 15D is connected to the negative electrode of the secondary battery 53 regardless of the polarity of the main charging terminal voltage Vo.
- the control circuit 63 performs the above-described operation shown in FIG.
- the secondary battery 53 is charged and discharged by the DC / DC converter 55, and the degree of freedom of connection of the charging cable 85 is increased.
- FIG. 10A is a flowchart of an operation for causing inverter 17 to function as a power factor correction circuit in charge / discharge devices 11 and 51 in the third embodiment. 10A, the same operations as those in FIG. 9 are denoted by the same reference numerals.
- step S15 When the main charging terminal voltage Vo is an AC voltage in step S15 (Yes in step S15), the control circuit 23 controls the inverter 17 so as to function as a power factor correction circuit as in the operation shown in FIG. 4A ( Step S27). Thereafter, the control circuit 23 performs the operation of step S25.
- control circuit 23 controls the inverter 17 to function as a DC voltage conversion circuit.
- Step S15 when the charging terminal voltage Vo is not an AC voltage (No in Step S15), the control circuit 23 performs the operations in Steps S17, S19, and S61 as in the operation illustrated in FIG.
- Step S17 When the main charging terminal voltage Vo is a DC voltage in Step S17 (Yes in Step S17), the control circuit 23 performs the operation of Step S21 in the flowchart shown in FIG. 9, but the operation shown in FIG. Since the control circuit 23 operates the inverter 17 as a DC voltage conversion circuit at the time of charging or discharging, the control circuit 23 does not perform the operation of step S21 shown in FIG.
- control circuit 23 compares the charging rate SOC1 and the charging rate SOC2 (step S63). If charging rate SOC1 is not larger than charging rate SOC2 in step S63 (No in step S63), control circuit 23 keeps switching element 33 off and switches switching element 35 on as in the first embodiment. In the maintained state, the switching elements 29 and 31 are alternately turned on and off at a predetermined cycle (step S29). As a result, in combination with the inductor 37L of the filter circuit 37, the inverter 17 boosts the main charging terminal voltage Vo and applies it across both ends of the smoothing capacitor 27, that is, between the ports 15C and 15D of the DC / DC converter 15. Functions as a boost converter. Thereafter, the control circuit 23 performs an operation of charging the secondary battery 53 with the power of the secondary battery 53 (step S25).
- Step S63 when the charging rate SOC1 is larger than the charging rate SOC2 in Step S63 (Yes in Step S63), the control circuit 23 maintains the switching element 33 in the off state and maintains the switching element 35 in the on state. 31 is alternately turned on and off at a predetermined cycle (step S67).
- a DC voltage conversion circuit that steps down the voltage between both ends of the smoothing capacitor 27, that is, the ports 15C and 15D of the DC / DC converter 15, and outputs the voltage to the main charging terminal 19. Functions as a step-down converter.
- step S67 the operation of turning on the switching element 35 and the operation of switching the switching elements 29 and 31 in step S67 are both the same as the operation of step S29.
- the control circuit 23 controls the inverter 17 so as to function as a DC voltage conversion circuit capable of performing both the step-up operation and the step-down operation. Thereafter, the control circuit 23 discharges the secondary battery 13 and charges the secondary battery 53 with the voltage output from the main charging terminal 19.
- the above configuration and operation reduce the possibility of further discharging the power of the secondary battery 53 with a small charge rate SOC2, that is, with a small remaining power, and the power of the secondary battery 13 with a large charge rate SOC1
- the charging / discharging device 11 that can normally charge the secondary battery 53 that originally needs power interchange can be realized. Furthermore, the charging / discharging device 11 capable of power interchange from a secondary battery having a large remaining power level to a secondary battery having a small remaining power level can be realized regardless of the connection direction of the charging cable 85.
- step S63 in FIG. 9 of the third embodiment the control circuit 23 compares the charge rates SOC1 and SOC2 to compare the remaining power levels of the secondary batteries 13 and 53. Yes. For example, if the charging rates SOC1 and SOC2 are proportional to the secondary battery voltages Vb and Vba of the secondary batteries 13 and 53, the control circuit 23 compares the secondary battery voltages Vb and Vba to thereby obtain the secondary battery 13, The remaining power levels of 53 may be compared.
- FIG. 10B is a flowchart of still another operation of the charge / discharge device 11.
- FIG. 10B operations similar to those shown in FIGS. 9 and 10A are denoted by the same reference numerals.
- the control circuit 23 does not perform the operation of step S27 illustrated in FIG. 10A, and the control circuit 23 controls the inverter 17 to function as a rectifier circuit, similarly to the operation illustrated in FIG.
- FIG. 10C is a flowchart of still another operation of the charge / discharge device 11.
- FIG. 10C operations similar to those shown in FIGS. 9 and 10A are denoted by the same reference numerals.
- the control circuit 23 performs the operation of step S27 illustrated in FIG. 10A, and performs the operation of step S21 illustrated in FIG. 9 without performing the operations of steps S29 and S67.
- FIG. 11 is a block circuit diagram when charging / discharging device 11 according to Embodiment 4 is charged with DC power. 11, the same reference numerals are assigned to the same parts as those of the charge / discharge devices 11 and 51 shown in FIGS.
- the main charging terminal 19 of the charging / discharging device 11 and the other sub charging terminal 79 of the other charging / discharging device 51 are connected by the charging cable 85, and the other main charging terminal 59 of the charging / discharging device 51 is connected.
- the sub charging terminal 39 of the charging / discharging device 11 is connected by another charging cable 87.
- the control circuits 23 and 63 control the DC / DC converters 15 and 55 so that the secondary battery 53 is charged with the electric power of the secondary battery 53. Thereby, the electric power discharged from the secondary battery 53 is supplied to the secondary battery 13 in two systems by the charging cables 85 and 87, and the power interchange of the secondary battery 13 is performed quickly.
- 12A and 12B are flowcharts of operations of the charge / discharge devices 11 and 51 in the fourth embodiment. 12A and 12B, the same operations as those in FIG. 3 are denoted by the same reference numerals.
- the flowcharts shown in FIGS. 12A and 12B are also subroutines executed from the main routine, as in the first embodiment.
- the control circuit 23 When the user gives an instruction to start power interchange of the two systems of the charging cables 85 and 87 to the control circuit 23, the subroutine shown in the flowcharts of FIGS. 12A and 12B is executed. As a result, the control circuit 23 first turns off the switching elements 29, 31, 33, and 35 of the inverter 17 and transmits the data signal DAT 1 to the control circuit 63, so that the control circuit 63 switches the switching elements 69, 71, 73, and 75 are turned off (step S70).
- the control circuit 23 turns on the main relays 18 and 58 and the sub-relays 41 and 81 (step S71). Since the control circuit 23 is connected to the sub relay 41, the sub relay 41 is directly turned on by the sub relay signal R1. On the other hand, since the sub relay 81 of the charging / discharging device 51 is not directly connected to the control circuit 23, the control circuit 23 transmits the data signal DAT 1 to the control circuit 63 so as to turn on the sub relay 81. In response to this, the control circuit 63 turns on the sub relay 81 by the sub relay signal R2. The control circuit 23 controls the main relays 18 and 58 similarly to the sub relays 41 and 81.
- the control circuit 23 takes in the main charging terminal voltages Vo and Voa (step S73). Specifically, the main charging terminal voltage Voa is captured by the control circuit 63 and transmitted to the control circuit 23 as the data signal DAT2, so that the control circuit 23 can obtain the main charging terminal voltage Voa.
- step S75 determines whether or not at least one of the main charging terminal voltages Vo and Voa is an AC voltage (step S75).
- step S75 if at least one of the main charging terminal voltages Vo and Voa is an AC voltage (Yes in step S75), the control circuit 23 has a commercial AC power supply 25 connected to at least one of the main charging terminals 19 and 59.
- the control circuit 23 turns off the main relays 18 and 58 and the sub-relays 41 and 81 (step S77) and outputs a connection error signal (step S79). Thereby, the user can know the connection mistake with respect to the electric power interchange of two systems.
- step S79 connection error signal
- step S81 determines whether or not both the main charging terminal voltages Vo and Voa are DC voltages.
- step S81 if at least one of the main charging terminal voltages Vo and Voa is not a DC voltage (No in step S81), it is determined that no voltage is applied to at least one of the main charging terminals 19 and 59 and the terminal is not connected. . Then, the control circuit 23 outputs an unconnected signal (step S19) and returns to the main routine.
- step S81 when both the main charging terminal voltages Vo and Voa are DC voltages in step S81 (Yes in step S81), the control circuit 23 is able to charge the secondary battery 13 by power interchange by the two systems of the charging cables 85 and 87. Judge that it is possible. Then, the control circuit 23 keeps the switching elements 31 and 33 off and turns on the switching elements 29 and 35 (step S21). Thereafter, the control circuit 23 transmits a command to the control circuit 63 as the data signal DAT1 to keep the switching elements 71 and 73 of the charging / discharging device 51 off and turn on the switching elements 69 and 75. In response to the data signal DAT1, the control circuit 63 keeps the switching elements 71 and 73 off and turns on the switching elements 69 and 75.
- FIG. 11 shows the state of the charge / discharge devices 11 and 51 that have performed the operation of step S83. In FIG. 11, main charging terminals 19 and 59 are electrically connected to DC / DC converters 15 and 55, respectively.
- the control circuit 23 determines whether or not the main charging terminal voltage Vo is higher than the main charging terminal voltage Voa (step S85). Thereby, it can prevent charging a secondary battery with a high voltage with the electric power from a secondary battery with a low voltage. That is, when the main charging terminal voltage Vo is higher than the main charging terminal voltage Voa in step S85 (Yes in step S85), the control circuit 23 controls the secondary battery 53 to be charged with the electric power of the secondary battery 53.
- the main charging terminal voltage Vo is substantially equal to the secondary battery voltage Vba within an error range
- the main charging terminal voltage Voa is substantially equal to the secondary battery voltage Vb within an error range.
- the secondary battery 13 is electrically connected to the main charging terminal 59 through the charging cable 87, the sub charging terminal 39 and the sub relay 41. Therefore, the voltage detection circuit 21 detects another secondary battery voltage Vba as the main charging terminal voltage Vo, and the voltage detection circuit 61 detects the secondary battery voltage Vb as the main charging terminal voltage Voa.
- step S85 When the main charging terminal voltage Vo is higher than the main charging terminal voltage Voa in step S85 (Yes in step S85), the secondary battery voltage Vba is higher than the secondary battery voltage Vb based on the above.
- the DC / DC converter 15 is driven so as to charge the secondary battery 13 (step S87).
- the control circuit 23 drives the DC / DC converter 55 so as to discharge the secondary battery 53 (step S89).
- step S89 the operation of step S89 is executed by the control circuit 23 transmitting the data signal DAT1 to the control circuit 63 so as to drive the DC / DC converter 55.
- the power interchange operation is performed in both the DC / DC converters 15 and 55. Although it is necessary to operate both DC / DC converters 15 and 55, it is possible to quickly exchange power between the secondary batteries 13 and 53 with a light and simple configuration with two charging cables 85 and 87. Become.
- control circuit 23 ends the subroutines of FIGS. 12A and 12B and returns to the main routine.
- step S85 when the charging terminal voltage Vo is not higher than the charging terminal voltage Voa in step S85 (No in step S85), the control circuit 23 controls the DC / DC converter 15 to discharge the secondary battery 13 (step S91). ). Then, the control circuit 23 drives the DC / DC converter 55 so as to charge the secondary battery 53 (step S93). Thereby, even if the magnitude relationship between the secondary battery voltage Vb and the other secondary battery voltage Vba is reversed, power interchange can be performed correspondingly.
- control circuit 23 ends the subroutines of FIGS. 12A and 12B and returns to the main routine.
- the control circuit 23 outputs a connection error signal, and the secondary battery 13 is not charged. Therefore, since no AC voltage is applied to the inverter 17, the control circuits 23 and 63 do not need to function the inverter 17 or the inverter 57 as a power factor correction circuit.
- the control circuit 23 causes the inverters 17 and 57 to be connected to the DC voltage conversion circuit. It may be controlled to function as 13A and 13B are flowcharts of other operations of charge / discharge devices 11 and 51 in the fourth embodiment. 13A and 13B, the same reference numerals are assigned to the same operations as those in FIGS. 12A and 12B.
- step S81 when both the main charging terminal voltages Vo and Voa are DC voltages (Yes in step S81), the control circuit 23 controls the inverters 17 and 57 to function as a DC voltage conversion circuit. Therefore, the control circuit 23 does not perform the operations of steps S21 and S83 shown in FIGS. 12A and 12B.
- step S85 determines whether or not the main charging terminal voltage Vo is higher than the main charging terminal voltage Voa (step S85).
- step S85 when the main charging terminal voltage Vo is not higher than the main charging terminal voltage Voa (No in step S85), the control circuit 23 is similar to the operation shown in FIG. 10A in order to discharge the secondary battery 13. With the switching element 33 kept off and the switching element 35 kept on, the switching elements 29 and 31 are alternately turned on and off at a predetermined cycle. As a result, a smoothing capacitor is combined with the inductor 37L of the filter circuit 37.
- step S67 is operated as a step-down converter that is a DC voltage conversion circuit that steps down the voltage between both ends of the terminal 27, that is, the ports 15C and 15D of the DC / DC converter 15 and outputs the voltage to the main charging terminal 19 (step S67).
- the control circuit 23 controls the DC / DC converter 15 to discharge the secondary battery 13 (step S91).
- the control circuit 23 instructs the control circuit 63 to transmit the data signal DAT1 so that the inverter 57 operates as a boost converter.
- the control circuit 63 alternately turns on and off the switching elements 69 and 71 in a predetermined cycle while keeping the switching element 73 off and keeping the switching element 75 on.
- the inverter 57 boosts the main charging terminal voltage Voa in combination with the inductor 77L of the filter circuit 77 and applies a DC voltage conversion applied between both ends of the smoothing capacitor 67, that is, between the ports 55C and 55D of the DC / DC converter 55.
- the boost converter which is a circuit is operated (step S95). Thereafter, the control circuit 23 operates the DC / DC converter 55 so as to charge the secondary battery 53 (step S93). Thereby, the other secondary battery 53 is charged by the two systems.
- step S85 when the main charging terminal voltage Vo is higher than the main charging terminal voltage Voa in step S85 (Yes in step S85), the control circuit 23 keeps the switching element 33 off in order to charge the secondary battery 13.
- the switching elements 29 and 31 are alternately turned on and off at a predetermined cycle while the switching element 35 is kept on.
- the inverter 17 boosts the main charging terminal voltage Vo in combination with the inductor 37L of the filter circuit 37 and applies the DC voltage conversion applied to both ends of the smoothing capacitor 27, that is, between the ports 15C and 15D of the DC / DC converter 15.
- the boost converter which is a circuit is operated (step S29). Thereafter, the DC / DC converter 15 is controlled so as to charge the secondary battery 13 (step S87).
- the control circuit 23 transmits the data signal DAT1 to the control circuit 63, thereby keeping the switching element 73 off and maintaining the switching element 75 on in a predetermined cycle. Turn on and off alternately.
- the inverter 57 steps down the voltage applied across the smoothing capacitor 67, that is, between the ports 55C and 55D of the DC / DC converter 55, in combination with the inductor 77L of the filter circuit 77, and outputs it to the main charging terminal 59. It operates as a step-down converter that is a DC voltage conversion circuit (step S97).
- the control circuit 23 operates the DC / DC converter 55 so as to discharge the secondary battery 53 (step S89). Thereby, the secondary battery 13 is charged by two systems.
- the electric power discharged from the other secondary battery 53 by the above configuration and operation is supplied to the secondary battery 13 in two systems by the charging cables 85 and 87 having a light and simple configuration. Therefore, the charging / discharging devices 11 and 51 that can perform the power interchange of the secondary battery 13 quickly are obtained.
- the fourth embodiment it is determined which of the secondary batteries 13 and 53 is charged based on the secondary battery voltages Vb and Vba.
- the secondary battery 13 is charged.
- 53 may be determined by comparing the charging rates SOC1 and SOC2 of the secondary battery 13 or 53.
- the charging direction is determined to allow power interchange. If the charging direction opposite to the charging direction designated by the user is necessary without determining the charging direction, a warning may be issued. In this case, the possibility of power interchange unintended by the user can be reduced.
- the configuration and operation of the second embodiment may be combined. In this case, even if the charging cable 85 is connected to the main charging terminal 19 and the sub charging terminal 79 in the reverse direction, or the charging cable 87 is connected to the main charging terminal 59 and the sub charging terminal 39 in the reverse direction, the electric power is normally exchanged. Can be performed.
- the charging / discharging device 11 includes the DC / DC converter 15 configured to be electrically connected to the secondary battery 13, the inverter 17 electrically connected to the DC / DC converter 15, The main charging terminal 18 electrically connected to the inverter 17, the voltage detection circuit 21 that operates to detect the voltage of the main charging terminal 19, the DC / DC converter 15, the inverter 17, and the voltage detection circuit 21 are electrically connected. And a control circuit 23 connected to.
- the control circuit 23 outputs a DC voltage from the power stored in the secondary battery 13 by the DC / DC converter 15, and the inverter 17 converts the DC voltage output from the DC / DC converter 17 into an AC voltage. 17 and the DC / DC converter 15 are controlled.
- the inverter 17 When the control circuit 23 charges the secondary battery 13 with the voltage input to the main charging terminal 59 and the voltage detected by the voltage detection circuit 21 is an AC voltage, the inverter 17 is connected to the rectifier circuit or the power factor. The inverter 17 and the DC / DC converter 15 are controlled so that the DC / DC converter 15 is operated as an improvement circuit and a DC voltage is supplied to the DC / DC converter 15 and the DC / DC converter 15 charges the secondary battery 13 by the supplied DC voltage. It works like this.
- the control circuit 23 charges the secondary battery 13 with the voltage input to the main charging terminal 19 and the voltage detected by the voltage detection circuit 21 is a DC voltage
- the inverter 17 The voltage is supplied to the DC / DC converter 15 substantially as it is and the DC / DC converter 15 charges the secondary battery 13; and (2) the inverter 17 converts the voltage and supplies it to the DC / DC converter 15.
- the DC / DC converter 15 operates so as to be switched according to the voltage so as to function as a direct current voltage conversion circuit.
- the voltage detection circuit 21 determines the polarity of the DC voltage when the voltage detected by the voltage detection circuit 21 is a DC voltage. It may work. In this case, when the control circuit 23 charges the secondary battery 13 with the voltage input to the main charging terminal 19, the voltage detected by the voltage detection circuit 21 is a DC voltage.
- the inverter 17 is controlled so that a voltage is supplied to the DC / DC converter 15 with a certain polarity according to the polarity.
- the charging / discharging device 11 includes a sub-relay 41 configured to be connected to the secondary battery 13 and a sub-charging terminal 39 configured to be electrically connected to the secondary battery 13 via the sub-relay 41. And may further be provided.
- the charging / discharging device 11 may be configured to be used with another charging / discharging device 51 configured to be connected to another secondary battery 53.
- the other charging / discharging device 51 is electrically connected to the other secondary battery 53 via the other sub relay 81 and the other sub relay 81 configured to be connected to the other secondary battery 53.
- another sub-charging terminal 79 configured to be configured as described above.
- the main charging terminal 59 is configured to be connected to the other sub charging terminal 79 via the charging cable 85 when the secondary battery 13 is charged with the electric power stored in the other secondary battery 53.
- the control circuit 23 operates to turn on the other sub-relay 81 when charging the secondary battery 13 with the electric power stored in the other secondary battery 53.
- the other charging / discharging device 11 may further include another control circuit 63 for turning on / off the other sub relay 81.
- the control circuit 23 communicates with the other control circuit 63 when charging the secondary battery 13 with the power stored in the other secondary battery 53, and connects the other sub relay 81 to the other control circuit 63. Operates to turn on and off.
- control circuit 23 When the control circuit 23 charges the secondary battery 13 with the electric power stored in the other secondary battery 53, the control circuit obtains the charge rate SOC1 of the secondary battery 13 and communicates with the other control circuit 63. Another charging rate SOC2 of another secondary battery 53 may be obtained, and it may be operated to determine whether or not to end the charging of the secondary battery 13 based on the charging rates SC1 and SOC2.
- the control circuit may operate to control the DC / DC converter 15 so as to charge the other secondary battery 53 when the charging rate SOC1 is larger than the other charging rate SOC2.
- the control circuit 23 controls the DC / DC converter 15 to charge the secondary battery 13 with the electric power stored in the other secondary battery 53 when the charge rate SOC1 is equal to or lower than the other charge rate SOC2. It may work.
- the control circuit 23 may operate so as to communicate with another control circuit 63 wirelessly.
- the other charging / discharging device 51 includes another DC / DC converter 55 configured to be connected to another secondary battery 53, and the other secondary battery 53 via at least the other DC / DC converter 55.
- Another main charging terminal 59 configured to be electrically connected and another control circuit 63 connected to another DC / DC converter 55 may be provided.
- the main charging terminal 19 and the other sub charging terminal 59 are connected by the charging cable 85, and the other main charging terminal 59 and the sub charging terminal 79 are connected by the other charging cable 87.
- the DC / DC converter 15 is controlled so as to charge the secondary battery 13 with the power stored in the other secondary battery 53, and the secondary battery 13 is controlled with the power stored in the other secondary battery 53. You may operate
- the charging / discharging device 11 is configured to be mounted on an electric vehicle.
- the present invention is not limited to this. It can be applied to a charging / discharging device or the like in the case of accommodation.
- the charging / discharging device according to the present invention is useful as a charging / discharging device that requires emergency power interchange of an electric vehicle, because it is possible to interchange electric power between electric vehicles with a lightweight and simple charging cable.
- Charging / Discharging Device 13 Secondary Battery 15 DC / DC Converter 17 Inverter 19 Main Charging Terminal 21 Voltage Detection Circuit 23 Control Circuit 39 Sub Charging Terminal 41 Sub Relay 53 Secondary Battery (Other Secondary Battery) 55 DC / DC converters (other DC / DC converters) 59 Main charging terminal (other main charging terminals) 63 Control circuit (other control circuits) 79 Sub charging terminal (Other sub charging terminal) 81 Sub relay (other sub relays) 85 Charging cable 87 Charging cable (other charging cables)
Abstract
Description
図1は、本発明の実施の形態1における充放電装置11のブロック回路図である。実施の形態1では、充放電装置11は電動車両に搭載され、電動車両等の車両に搭載された二次電池13と共に用いられるように構成されている。図1では、充放電装置11は商用の交流電源25から供給される交流電力を二次電池13に充電する。
図5は実施の形態2における充放電装置11、51の直流電力充電時のブロック回路図である。図5において、図1と図2に示す充放電装置11、51と同じ部分には同じ参照番号を付す。
図8は本発明の実施の形態3における充放電装置11の直流電力充電時のブロック回路図である。図8において、図1と図2に示す充放電装置11、51と同じ部分には同じ参照番号を付す。
図11は実施の形態4における充放電装置11の直流電力充電時のブロック回路図である。図11において、図1と図2に示す充放電装置11、51と同じ部分には同じ参照番号を付す。
13 二次電池
15 DC/DCコンバータ
17 インバータ
19 主充電端子
21 電圧検出回路
23 制御回路
39 副充電端子
41 副リレー
53 二次電池(他の二次電池)
55 DC/DCコンバータ(他のDC/DCコンバータ)
59 主充電端子(他の主充電端子)
63 制御回路(他の制御回路)
79 副充電端子(他の副充電端子)
81 副リレー(他の副リレー)
85 充電ケーブル
87 充電ケーブル(他の充電ケーブル)
Claims (9)
- 二次電池と電気的に接続されるように構成されたDC/DCコンバータと、
前記DC/DCコンバータと電気的に接続されたインバータと、
前記インバータと電気的に接続された主充電端子と、
前記主充電端子の電圧を検出するように動作する電圧検出回路と、
前記DC/DCコンバータと前記インバータと前記電圧検出回路と電気的に接続される制御回路と、
を備え、
前記制御回路は、
前記DC/DCコンバータが前記二次電池に蓄積された電力により直流電圧を出力し、
前記インバータが前記DC/DCコンバータから出力された前記直流電圧を交流電圧に変換する、
ように前記インバータと前記DC/DCコンバータを制御するよう動作し、
前記制御回路は、前記主充電端子に入力された電圧で前記二次電池を充電する際に、前記電圧検出回路で検出された前記電圧が交流電圧である場合に、
前記インバータが整流回路または力率改善回路として動作させて直流電圧を前記DC/DCコンバータに供給し、
前記供給された直流電圧により前記DC/DCコンバータが前記二次電池を充電する、
ように前記インバータと前記DC/DCコンバータを制御するよう動作し、
前記制御回路は、前記主充電端子に入力された前記電圧で前記二次電池を充電する際に、前記電圧検出回路で検出された前記電圧が直流電圧である場合に、
前記インバータが前記電圧を実質的にそのまま前記DC/DCコンバータに供給してかつ前記DC/DCコンバータが前記二次電池を充電することと、
前記インバータが前記電圧を変換して前記DC/DCコンバータに供給する直流電圧変換回路として機能させてかつ前記DC/DCコンバータが前記二次電池を充電することと、
を前記電圧に応じて切り替えるように動作する、充放電装置。 - 前記電圧検出回路は、前記主充電端子に入力された前記電圧で前記二次電池を充電する際に、前記電圧検出回路で検出された前記電圧が前記直流電圧である場合に前記直流電圧の極性を判別するように動作し、
前記制御回路は、前記主充電端子に入力された前記電圧で前記二次電池を充電する際に、前記電圧検出回路で検出された前記電圧が前記直流電圧である場合に、前記直流電圧の前記極性に応じて前記DC/DCコンバータに一定の極性で前記電圧が供給されるように前記インバータを制御するように動作する、請求項1に記載の充放電装置。 - 前記二次電池に接続されるように構成された副リレーと、
前記副リレーを介して前記二次電池と電気的に接続されるように構成された副充電端子と、
をさらに備え、
前記充放電装置は、他の二次電池に接続されるように構成された他の充放電装置と共に用いられるように構成されており、
前記他の充放電装置は、
前記他の二次電池に接続されるように構成された他の副リレーと、
前記他の副リレーを介して前記他の二次電池と電気的に接続されるように構成された他の副充電端子と、
を備え、
前記主充電端子は、前記二次電池を前記他の二次電池に蓄積された電力により充電する際に、前記他の副充電端子と充電ケーブルで接続されるように構成されており、
前記制御回路は、前記二次電池を前記他の二次電池に蓄積された前記電力により充電する際に、前記他の副リレーをオンにするように動作する、請求項1に記載の充放電装置。 - 前記他の充放電装置は、前記他の副リレーをオンオフする他の制御回路をさらに備え、
前記制御回路は、前記二次電池を前記他の二次電池に蓄積された前記電力により充電する際に、前記他の制御回路と通信を行って、前記他の制御回路に前記他の副リレーをオンオフさせるように動作する、請求項3に記載の充放電装置。 - 前記制御回路は、前記二次電池を前記他の二次電池に蓄積された前記電力により充電する際に、
前記二次電池の充電率を得て、
前記他の制御回路と通信を行って前記他の二次電池の他の充電率を得て、
前記充電率と前記他の充電率に基づいて前記二次電池の充電を終了するか否かを判断する、
ように動作する、請求項4に記載の充放電装置。 - 前記制御回路は、
前記二次電池の充電率を得て、
前記他の制御回路との通信により前記他の二次電池の他の充電率を得て、
前記充電率が前記他の充電率より大きい場合は、前記他の二次電池を充電するように前記DC/DCコンバータを制御する、
ように動作する、請求項4に記載の充放電装置。 - 前記制御回路は、前記充電率が前記他の充電率以下である場合は、前記二次電池を前記他の二次電池に蓄積された前記電力により充電するように前記DC/DCコンバータを制御するように動作する、請求項6に記載の充放電装置。
- 前記制御回路は前記他の制御回路と無線で通信を行うように動作する、請求項4に記載の充放電装置。
- 前記他の充放電装置は、
前記他の二次電池に接続されるように構成された他のDC/DCコンバータと、
少なくとも前記他のDC/DCコンバータを介して前記他の二次電池と電気的に接続されるように構成された他の主充電端子と、
前記他のDC/DCコンバータに接続された他の制御回路と、
を備え、
前記制御回路は、前記主充電端子と前記他の副充電端子とが前記充電ケーブルで接続されるとともに、前記他の主充電端子と前記副充電端子とが他の充電ケーブルで接続されている場合に、
前記他の二次電池に蓄積された前記電力で前記二次電池を充電するように前記DC/DCコンバータを制御し、
前記他の二次電池に蓄積された前記電力で前記二次電池を充電するように前記他のDC/DCコンバータを制御させるように前記他の制御回路を制御する、
ように動作する、請求項3に記載の充放電装置。
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EP14807946.0A EP3007315A4 (en) | 2013-06-03 | 2014-04-22 | Charger / discharger |
US14/786,712 US20160079776A1 (en) | 2013-06-03 | 2014-04-22 | Charge/discharge device |
JP2015521268A JPWO2014196121A1 (ja) | 2013-06-03 | 2014-04-22 | 充放電装置 |
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JPWO2014196121A1 (ja) | 2017-02-23 |
EP3007315A1 (en) | 2016-04-13 |
US20160079776A1 (en) | 2016-03-17 |
EP3007315A4 (en) | 2016-07-06 |
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