WO2008041684A1 - Dispositif de stockage de véhicule et système utilisant celui-ci - Google Patents

Dispositif de stockage de véhicule et système utilisant celui-ci Download PDF

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Publication number
WO2008041684A1
WO2008041684A1 PCT/JP2007/069227 JP2007069227W WO2008041684A1 WO 2008041684 A1 WO2008041684 A1 WO 2008041684A1 JP 2007069227 W JP2007069227 W JP 2007069227W WO 2008041684 A1 WO2008041684 A1 WO 2008041684A1
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WO
WIPO (PCT)
Prior art keywords
power storage
voltage
control circuit
vehicle
power
Prior art date
Application number
PCT/JP2007/069227
Other languages
English (en)
Japanese (ja)
Inventor
Yohsuke Mitani
Kazuki Morita
Takafumi Koike
Original Assignee
Panasonic Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2006270390A external-priority patent/JP5250953B2/ja
Priority claimed from JP2006325190A external-priority patent/JP5055984B2/ja
Application filed by Panasonic Corporation filed Critical Panasonic Corporation
Publication of WO2008041684A1 publication Critical patent/WO2008041684A1/fr

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Classifications

    • 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
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
    • 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
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/65—Monitoring or controlling charging stations involving identification of vehicles or their battery types
    • 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
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/66—Data transfer between charging stations and vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • H02J7/1423—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle with multiple batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • 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
    • 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
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • 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
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/14—Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Definitions

  • the present invention relates to a vehicle power storage device as an auxiliary power source that supplies power from a power storage unit when a voltage of a main power source drops, and a system using the same.
  • a starter is operated to start an engine.
  • a vehicle key is turned on
  • audio, car navigation, etc. are started before the starter, and power is supplied to these loads.
  • the starter starts.
  • the power supplied to the load is temporarily interrupted due to a decrease in battery voltage due to the starter operation.
  • the music is interrupted or the destination setting of the car navigation system is erased and needs to be reset.
  • Patent Document 1 proposes a vehicle power storage device as an auxiliary power source for supplying sufficient power to a load when the voltage of the battery is temporarily reduced.
  • FIG. 7 is a block circuit diagram of a conventional vehicle power storage device.
  • the vehicular power storage device 201 is provided with an auxiliary power supply unit 203 including an electric double layer capacitor for storing electric power.
  • a charging circuit 205 is connected to the auxiliary power source unit 203.
  • a stabilization circuit 207 that outputs power of the auxiliary power supply unit 203 is also connected.
  • a detection circuit 209 for detecting the voltage of the charging circuit 205 is connected to the input side of the charging circuit 205.
  • a power supply switching unit 211 that switches between the power supplied from the auxiliary power supply unit 203 and the power supply from the main power supply 215 according to the detection voltage of the detection circuit 209.
  • a main power supply unit 215 made of a battery is connected to the input side of the vehicle power storage device 201, that is, the input of the charging circuit 205, via the first switch 213. Further, one end of the second switch 217 is connected between the first switch 213 and the vehicle power storage device 201, and the other end is connected to a starter (not shown) built in the engine 219.
  • the first switch 213 and the second switch 217 are on / off controlled by a key mounting portion 221.
  • the key mounting part 221 has a lock mode, an accessory mode, an on mode, and a start mode. It has four modes of mode. In the lock mode, both the first switch 213 and the second switch 217 are turned off. In the accessory mode and the on mode, the first switch 213 is turned on and the second switch 217 is turned off. In the start mode, both the first switch 213 and the second switch 217 are turned on.
  • an in-vehicle device 223 such as audio or car navigation is connected to the output side of the vehicle power storage device 201, that is, the output of the power supply switching unit 211.
  • the operation of the vehicle power storage device 201 will be described.
  • the first switch 213 is turned on when the key is inserted into the key mounting portion 221 and the accessory mode is set.
  • the power of the main power supply unit 215 is supplied to the charging circuit 205, the detection circuit 209, and the power supply switching unit 211.
  • the charging circuit 205 charges the auxiliary power supply unit 203. Since the power supply switching unit 211 selects the main power supply unit 215 side as shown in FIG. 7, the power of the main power supply unit 215 is supplied to the in-vehicle device 223, and audio, car navigation, and the like operate.
  • the second switch 217 is also turned on.
  • the electric power of main power supply unit 215 is supplied to the starter built in engine 219, and the engine starts.
  • the detection circuit 209 detects this voltage change, and when it detects that the voltage of the main power supply unit 215 has become lower than a predetermined reference value, it switches the power supply switching unit 211 to the auxiliary power supply unit 203 side.
  • the in-vehicle device 223 can continue to operate.
  • the start of the engine 219 is completed, and the second switch 217 is turned off by setting the key to the on mode.
  • the voltage of the main power supply unit 215 becomes higher than a predetermined reference value.
  • the detection circuit 209 detects this voltage change and switches the power supply switching unit 211 to the main power supply unit 215 side. As a result, power is supplied to the in-vehicle device 223 from the main power supply unit 215.
  • the key of the key mounting portion 221 is set to the accessory mode, the key can be stopped within a short time.
  • the voltage of the main power supply unit 215 decreases immediately after the in-vehicle device 223 is activated.
  • charging of the auxiliary power supply unit 203 is started after the key is in the accessory mode, there is a possibility that charging of the auxiliary power supply unit 203 may be insufficient if the start mode is set within a short time.
  • the number of electric double layer capacitors constituting the auxiliary power supply unit 203 is reduced, and charging is performed by reducing the voltage of the main power supply unit 215 by the charging circuit 205.
  • the voltage of the auxiliary power supply unit 203 is boosted by a stabilization circuit 207 composed of a DC-DC converter and supplied to the in-vehicle device 223.
  • the full charge voltage of the auxiliary power supply unit 203 can be lowered, so that the charging can be completed earlier.
  • the DC-DC converter requires power for its operation. Therefore, when the starter is driven and power consumption due to the boosting operation of the DC-DC converter is further added, the loss of the main power supply unit 215 increases.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2002-64946
  • the present invention is a highly reliable power storage device for a vehicle that can be sufficiently charged before a starter operation when the vehicle is reused and that reduces loss of a main power source.
  • the vehicle power storage device of the present invention is connected between a main power supply and a load, and includes a power storage unit, a charge / discharge circuit, and a control circuit.
  • the power storage unit stores the power of the main power source.
  • the charge / discharge circuit is connected to the main power source, the load, and the power storage unit.
  • the control circuit is connected to the power storage unit and the charge / discharge circuit. At the end of use of the vehicle, the control circuit controls the charge / discharge circuit to discharge power until the voltage of the power storage unit reaches the predetermined holding voltage after the predetermined time has elapsed.
  • the control circuit controls the charge / discharge circuit to repeat the charging operation until the voltage of the power storage unit reaches the predetermined holding voltage.
  • the control circuit controls the charge / discharge circuit so that the power storage unit is fully charged.
  • FIG. 1 is a block diagram of a power storage device for a vehicle in a first embodiment of the present invention.
  • FIG. 2 is a flowchart showing the operation of the control circuit from when the vehicle power storage device shown in FIG. 1 is used to when the vehicle is reused.
  • FIG. 3 is a flowchart showing the operation of the control circuit during the starter operation of the vehicle power storage device shown in FIG.
  • FIG. 4 is a block circuit diagram showing a partial configuration of the vehicle power storage device according to Embodiment 2 of the present invention.
  • FIG. 5 is a block circuit diagram showing a partial configuration of the vehicle power storage device according to Embodiment 3 of the present invention.
  • FIG. 6A is a connection circuit diagram of a storage element of the power storage device for a vehicle according to Embodiment 3 of the present invention, and is a connection circuit diagram when the storage element is connected in parallel to the balance circuit
  • FIG. 6B is a connection circuit diagram of the power storage elements of the vehicle power storage device in Embodiment 3 of the present invention, and is a connection circuit diagram when the power storage elements are connected in series and parallel to the balance circuit.
  • FIG. 7 is a block circuit diagram of a conventional vehicle power storage device.
  • Vehicle side radio wave transmitter / receiver circuit (communication circuit)
  • Radio wave transmitter / receiver (key)
  • Isolated signal transmission unit for data transmission Isolated signal transmission unit for data reception 161 Idition switch for main power supply
  • FIG. 1 is a block diagram of a vehicle power storage device according to Embodiment 1 of the present invention.
  • FIG. 2 is a flowchart showing the operation of the control circuit from the end of use of the vehicle power storage device shown in FIG. 1 to the time of vehicle reuse.
  • Fig. 3 is a flowchart showing the operation of the control circuit during the starter operation.
  • bold lines indicate power system wiring
  • thin lines indicate signal system wiring.
  • a vehicle power storage device (hereinafter referred to as a power storage device) 11 is connected between a main power supply 15 connected via an innovation switch 13 and a load 17.
  • the idle switch 13 has the function of supplying the power of the main power supply 15 to the power storage device 11 and the function of supplying the power of the main power supply 15 to the starter 19 for starting the engine connected to the idance switch 13.
  • the main power source 15 is constituted by a battery
  • the load 17 is an auxiliary device such as audio, navigation, and audiovisual navigation.
  • the power storage device 11 includes a power storage unit 23, a charge / discharge circuit 21, and a control circuit 25. First, the related configuration of the power system wiring shown by the bold lines in Fig. 1 is explained.
  • a charge / discharge circuit 21 is connected to the output of the main power supply 15 via an idling switch 13.
  • a load 17 and a power storage unit 23 are connected to the charge / discharge circuit 21. Therefore, charging and discharging of the power storage unit 23 is controlled by the charge / discharge circuit 21.
  • the power storage unit 23 is preferably configured as a capacitor capable of rapid charge / discharge as a power storage element for storing the power of the main power supply 15.
  • an electric double layer capacitor having a full charge voltage of about 1.83 V and an initial capacity of 70 F is used. This is advantageous for completing the charging of the power storage unit 23 before the driver operates the starter 19 in particular.
  • the power storage unit 23 covers the power required by the load 17 when the starter 19 operates.
  • the combined capacity of the power storage unit 23 is 20F, and the full charge voltage is 12.8V.
  • the power storage unit 23 includes two multiplexers and a plurality of tolerance circuits (none of which are shown).
  • the first multiplexer is a selection switch for voltage monitoring, and is connected to a series connection portion of a plurality of power storage elements, and outputs a voltage of each connection portion. In this embodiment, seven voltages are output excluding ground.
  • the balance circuit is provided in order to balance the voltage at the serial connection portion of a plurality of power storage elements. As many balance circuits as the number of power storage elements in series are provided. In other words, seven balance circuits are provided in this embodiment.
  • the second multiplexer is a selection switch for a balance circuit, and selects one of a plurality of balance circuits and controls its operation on / off.
  • the charge / discharge circuit 21 controls the charging of the power storage unit 23 and controls the discharge from the power storage unit 23 to the load 17.
  • the charge / discharge circuit 21 has a function of switching the power supply source for the load 17 between the main power supply 15 and the power storage unit 23! /, And a function for on / off controlling the power supply to the load 17.
  • the charge / discharge circuit 21 is a function that discharges the electric power of the power storage unit 23 as heat inside the charge / discharge circuit 21, and detects the voltage Vb of the main power source, the voltage Vc of the power storage unit 23, and the voltage Vd of the load 17. It also has the ability. Note that a DC-DC converter is not used in the discharge path of the power storage unit 23.
  • a control circuit 25 composed of a microcomputer is connected to the power storage unit 23 and the charge / discharge circuit 21. Between the power storage unit 23 and the control circuit 25, the wiring of the selection signal SLV, the wiring of the storage element voltage input signal VNin, the wiring of the selection signal SLB, and the wiring of the on signal Lol are connected as signal system wiring. ing.
  • the selection signal SLV is a signal for selecting a voltage detection point for the voltage detection multiplexer of the storage element.
  • the storage element voltage input signal VNin is a signal for inputting the voltage at the selected voltage detection point.
  • the selection signal SLB is a signal transmitted to select the balance circuit to the second multiplexer for on / off control of the balance circuit.
  • ON signal Lol is a signal that turns on the selected balance circuit.
  • the control signal cont is a control signal that controls the overall operation of the charge / discharge circuit 21.
  • the voltage input signal Vin is a signal for inputting the voltages Vb, Vc and Vd detected by the charge / discharge circuit 21.
  • the force S which is the configuration of the power storage device 11, has been described above.
  • the control circuit 25 also inputs and outputs data with the external vehicle-side control circuit 27. Specifically, the control circuit 25 receives the input signal “in” transmitted from the vehicle side control circuit 27 and transmits the output signal “out” to the vehicle side control circuit 27.
  • the vehicle-side control circuit 27 is a power for controlling the entire vehicle. Here, only the parts necessary for describing the present embodiment will be described.
  • the vehicle-side control circuit 27 also has a microcomputer power.
  • data input / output to / from the control circuit 25 data input / output to / from the decision switch 13 and data transmitted / received to / from the vehicle-side radio wave transmission / reception circuit (hereinafter referred to as communication circuit) 29 I / O is performed.
  • the innovation switch 13 has four states (modes) as in the prior art.
  • the idle switch 13 outputs an idling signal IG indicating the current switch mode to the vehicle side control circuit 27. Further, the mode of the innovation switch 13 is switched by the innovation switch control signal IGcont output from the vehicle side control circuit 27. Therefore, the vehicle side control circuit 27 can confirm the switch mode by the ignition signal IG, and can switch the mode of the ignition switch 13 by the ignition switch control signal IGcont.
  • the communication circuit 29 has a function of transmitting and receiving radio waves for unlocking and locking the vehicle.
  • the communication circuit 29 is held by the driver and can be operated by the radio transmitter / receiver (hereinafter referred to as the key) 31.
  • the key 31 has a built-in battery 37 for supplying power necessary for transmitting and receiving radio waves.
  • the communication circuit 29 receives this signal.
  • the communication circuit 29 outputs the received signal RC to the vehicle side control circuit 27.
  • the vehicle-side control circuit 27 outputs data for requesting transmission of the unlock signal to the key 31 again to the communication circuit 29 by the transmission signal TR.
  • the communication circuit 29 transmits a transmission request signal corresponding to the transmission signal TR to the key 31 by radio waves.
  • the communication circuit 33 transmits the unlock signal to the communication circuit 29 again.
  • the communication circuit 29 outputs the received unlocking signal to the vehicle side control circuit 27 again.
  • the vehicle-side control circuit 27 compares the two unlocking signal data, and if they match, it authenticates that the driver is a legitimate driver. With this driver authentication method, the vehicle recognizes the driver. That is, the key 31, the vehicle-side control circuit 27, and the like are driver authentication units that transmit a signal for recognizing the driver to the power storage device 11.
  • the driver authentication unit may be configured. That is, the method for authenticating the driver is not particularly limited.
  • FIG. 2 is a flowchart showing the operation of the control circuit 25 from the end of vehicle use to the time of vehicle reuse.
  • the control circuit 25 executes the control according to the flowchart of FIG. 2 after a predetermined time has elapsed.
  • the control circuit 25 waits until the predetermined time elapses because the switch 13 may be put out of the lock mode to use the vehicle immediately. . Since it is assumed that the driver will not restart the engine immediately after entering the lock mode for more than 1 minute, the default time can be set to 1 minute, for example.
  • the control circuit 25 When the predetermined time has elapsed, the control circuit 25 outputs the operation prohibition signal of the starter 19 to the vehicle-side control circuit 27 as the output signal o ut (Sl). In response to this, the vehicle side control circuit 27 prohibits the operation of the starter 19.
  • the control circuit 25 instructs the charge / discharge circuit 21 to discharge the electric power of the power storage unit 23 (S 3).
  • the power storage unit 23 is discharged while being controlled by the balance circuit built in the power storage unit 23 so that the voltage across the power storage elements becomes equal.
  • the control circuit 25 is charged and discharged
  • the voltage Vc of the power storage unit 23 is fetched from the circuit 21 by the voltage input signal Vin and compared with the predetermined holding voltage Vk (S5).
  • the default holding voltage Vk is, for example, 10.5V.
  • the electricity storage elements are connected in series, the voltage of each electricity storage element is 1.5V.
  • This voltage is a voltage at which the life of the power storage element is equivalent to the life of the vehicle.
  • the vehicle life is assumed to be 15 years. Therefore, the life of power storage unit 23 when the vehicle is not used is equivalent to the life of the vehicle.
  • control circuit 25 In S5, if voltage Vc of power storage unit 23 is larger than predetermined holding voltage Vk (No), control returns to S5 and control circuit 25 waits until it becomes equal to or lower than predetermined holding voltage Vk. If the voltage Vc is equal to or lower than the predetermined holding voltage Vk (Yes), the control circuit 25 instructs the charge / discharge circuit 21 to stop discharging the power storage unit 23 (S7).
  • Control up to this point is executed immediately after the end of vehicle use. That is, the control circuit 25 discharges the power storage unit 23 until the voltage of the power storage unit 23 reaches the predetermined holding voltage Vk after the predetermined time has elapsed when the vehicle is finished using.
  • the control circuit 25 takes in the voltage Vc of the power storage unit 23 and compares it with the predetermined lower limit voltage Vcmin (S9).
  • the predetermined lower limit voltage Vcmin is defined as when the voltage across each storage element becomes 1.4V, for example. In this case, the default lower limit voltage Vcmin is 9.8V. If the voltage Vc is equal to or lower than the predetermined lower limit voltage Vcmin (Yes), the control circuit 25 instructs the charge / discharge circuit 21 to recharge the electric power that the power storage unit 23 has self-discharged (Sl l). .
  • the voltage Vb of the main power supply 15 is taken from the charge / discharge circuit 21 and compared with the predetermined limit voltage Vbmin (S 13).
  • the predetermined limit voltage Vbmin is the lower limit voltage for driving the load 17. In the first embodiment, it is set to 10.5V. If the voltage Vb is equal to or lower than the predetermined limit voltage Vbmin (Yes), it is considered that the main power supply 15 has deteriorated. Therefore, the control circuit 25 instructs the charging / discharging circuit 21 to stop charging the power storage unit 23 in order not to cause further voltage drop of the main power supply 15 (S15). Thereafter, the control jumps to S27 described later.
  • the control circuit 25 takes in the voltage Vc of the power storage unit 23 and compares it with the predetermined holding voltage Vk (10.5 V) (SI 7). If the electric If the voltage Vc is less than the predetermined holding voltage Vk (No), since the charging of the power storage unit 23 is not completed, the control returns to S13. On the other hand, if the voltage Vc is equal to or higher than the predetermined holding voltage Vk (Yes), it is considered that the storage unit 23 has been charged, and the control circuit 25 instructs the charging / discharging circuit 21 to stop charging the charging unit 23 ( S19). Thereafter, the control returns to S9, and the control circuit 25 again monitors the decrease in the voltage Vc of the power storage unit 23 due to self-discharge.
  • the control circuit 25 determines whether or not a full charge start signal of the power storage unit 23 is input from the vehicle-side control circuit 27 (S21). .
  • the full charge start signal is input from the vehicle side control circuit 27 to the control circuit 25 when the unlocking signal of the vehicle is transmitted from the key 31 or when communication between the key 31 and the vehicle becomes possible. . If the full charge start signal is not input (No), the vehicle continues to be in a non-use state, so the control returns to S9 and the control circuit 25 again decreases the voltage Vc of the power storage unit 23 due to self-discharge. To monitor.
  • control circuit 25 repeats the operation of charging until voltage Vc of power storage unit 23 reaches predetermined holding voltage Vk. Note that it takes about several tens of hours for the voltage Vc of the power storage unit 23 shown in S9 to become equal to or lower than the predetermined lower limit voltage Vcmin. If the control circuit 25 continues to operate during that time, power is consumed simply by repeating the operations of S9 and S21. Therefore, the comparison operation of S9 by the control circuit 25 may be intermittent, for example, once every several tens of hours. That is, the control circuit 25 may be in a power saving state until the comparison operation of S9 is performed. As a result, the power of the main power supply 15 can be reduced.
  • the vehicle-side control circuit 27 transmits the full charge start signal to the control circuit 25, and simultaneously transmits an idling switch control signal IGcont to the idance switch 13 so as to enter the accessory mode. As a result, the vehicle-side control circuit 27 supplies power to the power storage device 11. In addition, the control circuit 25 turns off the power supply to the load 17 in order to charge the power storage unit 23. And a control signal cont is transmitted to the charge / discharge circuit 21 so as to charge the power storage unit 23. In this way, charging of the power storage unit 23 is started.
  • the control circuit 25 instructs the charge / discharge circuit 21 to fully charge the power storage unit 23. That is, the power storage unit 23 is charged so as to always have the predetermined holding voltage Vk even when the vehicle is not used.
  • the control circuit 25 can rapidly charge the power storage unit 23 before the driver gets into the vehicle. Therefore, when the driver turns on the idle switch 13 to operate the starter 19, electric power can be supplied from the fully charged power storage unit 23 to the load 17. As a result, the possibility of power shortage in the power storage unit 23 is extremely reduced.
  • a conventional DC-DC converter is not used during discharge, so that there is no loss of the main power supply 15 due to its operation.
  • the power storage unit 23 is fully charged again after the starter 19 is operated at the time of starting the vehicle. This is to supply power to the load 17 during the operation of the starter 19 after the idling stop described below.
  • the vehicle-side control circuit 27 detects that the accessory mode has been set to the accessory mode IG. Then, the vehicle side control circuit 27 informs the control circuit 25 that the idance switch 13 is in the accessory mode by the output signal out. As a result, the control circuit 25 transmits a control signal cont to the charge / discharge circuit 21 so as to turn on the power supply to the load 17. As a result, power is supplied to the load 17, and the load 17 starts to operate.
  • the control circuit 25 is connected to the charge / discharge circuit 21 so that the power of the main power supply 15 is supplied to the load 17. Instruct (S31). Specifically, the control signal cont for switching the charging / discharging circuit 21 to supply the power of the main power supply 15 to the load 17 is transmitted to the charging / discharging circuit 21.
  • the control circuit 25 monitors the output of the voltage detection circuit (not shown) built in the charge / discharge circuit 21 and the output of the comparison circuit between the predetermined limit voltage Vbmin (10.5 V). Although not shown, this comparison circuit is built in the charge / discharge circuit 21. If the voltage Vb is equal to or higher than the predetermined limit voltage Vbmin (No), it means that the starter 19 is not operated after the idling stop, so the control returns to S33 and the control circuit 25 operates the starter 19 Continue judgment
  • the control circuit 25 determines that the starter 19 is operating and charges the power storage unit 23 to supply the load 17 with power.
  • the discharge circuit 21 is instructed (S35). Specifically, the control circuit 25 transmits to the charge / discharge circuit 21 a control signal cont for switching to supply the power of the power storage unit 23 to the load 17. As a result, while the voltage Vb of the main power supply 15 drops due to the operation of the starter 19, power is continuously supplied from the power storage unit 23 to the load 17.
  • the control circuit 25 takes in the voltage Vb of the main power supply 15 and compares it with the predetermined limit voltage Vbmin (S37). If the voltage Vb is less than the predetermined limit voltage Vbmin (No), the control returns to S37 and the control circuit 25 waits until the voltage Vb recovers to the predetermined limit voltage Vbmin or more. If the voltage Vb is equal to or higher than the predetermined limit voltage Vbmin (Yes), the control circuit 25 controls the charge / discharge circuit 21 to supply the power of the main power supply 15 to the load 17 (S39). This operation is the same as the operation of S31 described above. Next, the control circuit 25 instructs the charge / discharge circuit 21 to fully charge the power storage unit 23 (S41). This prepares for the next idling stop. By repeating such an operation, the voltage drop of the main power supply 15 after idling stop is compensated by the electric power of the power storage unit 23, and the load 17 is continuously driven.
  • the control circuit 25 controls the charge / discharge circuit 21 to negatively charge the power of the power storage unit 23. Supply to load 17.
  • the control circuit 25 controls the charge / discharge circuit 21 to supply the power of the main power supply 15 to the load 17 and to fully charge the power storage unit 23. Repeat the operation. [0051] With the above configuration and operation, the control circuit 25 stores power to some extent in the power storage unit 23 even when the vehicle is not in use, and fully charges the power storage unit 23 when the driver is authenticated. Therefore, the power storage unit 23 is fully charged early, and the loss of the main power supply 15 can be reduced because there is no DC-DC converter.
  • driver authentication including an alcohol detector may be used.
  • the vehicle side control circuit 27 causes the control circuit 25 to start charging the power storage unit 23 from the time when such an operation is started. Therefore, the control circuit 25 can fully charge the power storage unit 23 by the charge / discharge circuit 21 between the start of alcohol detection and the start of the vehicle is permitted. In this way, the driver authentication unit may be configured.
  • driver recognition method other recognition methods such as driver face image recognition, fingerprint recognition, vein recognition, iris recognition, and the like may be applied. Also in this case, these driver recognition methods can charge the power storage unit 23 immediately after the operation starts, so that the power can be fully charged during the authentication. In addition, the driver recognition methods described in this embodiment may be used alone or in any combination.
  • the force described for the idling stop vehicle may be applied at the time of starting in a general vehicle.
  • the control circuit 25 discharges the power storage unit 23 until the predetermined holding voltage Vk is reached. Thereafter, when voltage Vc of power storage unit 23 reaches predetermined lower limit voltage Vcmin, control circuit 25 repeats the operation of charging until voltage Vc reaches predetermined holding voltage Vk.
  • Vc voltage of power storage unit 23
  • Vcmin voltage of power storage unit 23
  • a force using an electric double layer capacitor as a power storage element other than this, a capacitor capable of rapid charge / discharge such as an electrochemical capacitor may be used.
  • FIG. 4 is a block circuit diagram of the vehicle power storage device according to Embodiment 2 of the present invention.
  • the power storage device for a vehicle in the present embodiment will be described focusing on a preferable function of the balance circuit, which is not described in the first embodiment.
  • the overall configuration including other vehicles is the same as that of the first embodiment.
  • the storage element 101 that charges and discharges electric power is an electric double layer capacitor, and a plurality of these are connected in series to form the storage element unit 102.
  • a balance circuit 103 is connected to each of the power storage elements 101 in parallel.
  • the balance circuit 103 is configured by connecting a transistor as the switching element 105 and a resistor 107 in series. For this reason, when the switching element 105 is turned on, the resistor 107 is connected to both ends of the power storage element 101. As a result of the discharge by the resistor 107, the voltage of the power storage element 101 decreases. That is, the voltage of the power storage element 101 can be controlled to be lowered by the on / off control of the switching element 105.
  • the balance circuit 103 is connected to a voltage monitor selection switch (hereinafter referred to as “switch”) 109 for selecting a voltage V;! To Vn (n is the number of the storage elements 101 + 1) at one end thereof.
  • the switch 109 is constituted by a multiplexer, for example.
  • the switch 109 is connected to a control circuit 113 which will be described later.
  • the switch 109 receives from the control circuit 113 a voltage selection signal SLV indicating which voltage V ;! to Vn is to be selected.
  • Switch 109 selects voltage V;! To Vn based on voltage selection signal SLV. Further, the switch 109 has a floating configuration in which any one of the voltages V;!
  • To Vn is not selected when the supply of the power supply voltage (for example, DC5V) is cut off.
  • the power source of the switch 109 is turned off at the time of stop, both ends of each balance circuit 103 are all insulated by the switch 109. That is, when the switch 109 is turned off, each balance circuit 103 is opened. Therefore, the storage element 101 is prevented from being discharged via the switch 109.
  • a balance circuit selection switch (hereinafter referred to as a switch) 111 is connected to the base terminal of the transistor, which is an on / off control terminal of each switching element 105.
  • the switch 111 is also composed of, for example, a multiplexer! Switch 111 is also connected to control circuit 113.
  • the switch 111 receives from the control circuit 113 a switching element selection signal SLB indicating which switching element 105 is selected.
  • Switch 111 is switching An arbitrary switching element 105 is selected based on the element selection signal SLB. Then, the ON signal Lo 1 generated by the control circuit 113 is transmitted to the selected switching element 105.
  • control circuit 113 can operate an arbitrary balance circuit 103 according to the voltage balance state of the power storage elements 101, and can individually balance the voltages of the power storage elements 101.
  • Power storage element unit 102, balance circuit 103, switch 109, and switch 111 correspond to power storage unit 23 of the first embodiment.
  • the control circuit 113 includes a microcomputer and peripheral circuits (not shown) that generate and transmit / receive various signals such as an ON signal Lol. As described above, the control circuit 113 transmits the voltage selection signal SLV to the switch 109, and the switching element selection signal SLB and the ON signal Lol to the switch 111. In addition, the control circuit 113 receives the midpoint voltage when the voltage selected by the switch 109 (V;! To Vn! /, Deviation) is divided by the two resistors 115 and 117 as the voltage signal Vin. To do. Therefore, the voltage signal Vin has a value proportional to the voltage Vi (l ⁇ i ⁇ n). The control circuit 113 has other terminals for transmitting and receiving force S, which will be described in order.
  • the driving power (for example, DC5V) of the switches 109 and 111 and the control circuit 113 is supplied when the switch element 119 is turned on.
  • the on / off operation of the switch element 119 is controlled by an activation signal Wake from the outside of the power storage device 157 or a power control signal Lo of the control circuit 113, which will be described later.
  • the switch element 119 is composed of, for example, a P-channel MOSFET.
  • the source terminal S is connected to the maximum voltage VI of the storage element 101.
  • the first resistor 121 is connected between the source terminal S and the gate terminal G.
  • the gate terminal G is connected to the control circuit 113 through the second resistor 123.
  • a regulator 127 for generating a constant voltage (DC5V) is connected to the drain terminal D via a diode 125 for preventing backflow.
  • DC5V constant voltage
  • An activation isolated signal transmission unit (hereinafter referred to as a transmission unit) 131 is connected to a connection point between the control circuit 113 and the second resistor 123.
  • the transmission unit 131 is configured by a photo power bra, for example, and the transmission unit 1
  • a connection point between the control circuit 113 and the second resistor 123 is connected to the collector side of the phototransistor 133 included in 31.
  • the emitter side of the phototransistor 133 is connected to the ground.
  • an external control circuit 137 is connected to the anode side of the light emitting diode 135 of the transmission unit 131. Similar to the control circuit 113, the external control circuit 137 includes a microcomputer and a peripheral circuit, and is used for vehicle control including charge / discharge control of the power storage element unit 102 and the like. The external control circuit 137 transmits a start signal Wake to the light emitting diode 135. The power sword side of light emitting diode 135 is connected to ground via resistor 139! / ⁇
  • the external control circuit 137 is driven at a constant voltage of DC5V, like the control circuit 113. This power is supplied by converting the output voltage of a battery 141 of a low voltage system (for example, DC 12 V) mounted on the vehicle to DC 5 V by a regulator 142. Therefore, the external control circuit 137 obtains power from a power source independent of the control circuit 113.
  • a low voltage load 144 is connected to the battery 141 via a notary idling switch 143.
  • the battery change-over switch 143 has a function of transmitting an turn-on signal IG indicating the turn-on / off state of the turn-on. As shown in FIG. 4, the battery innovation switch 143 transmits an innovation signal IG to an external control circuit 137 and a main power supply innovation switch 161 described later.
  • the external control circuit 137 and the control circuit 113 exchange data with each other.
  • transmission unit an isolated signal transmission unit for data transmission
  • the configuration of the transmission unit 145 is the same as the configuration of the transmission unit 131, but the positions of the phototransistor 147 and the light emitting diode 149 are reversed.
  • a specific data transmission method is as follows. First, voltage data and the like of the storage element 101 are transmitted from the control circuit 113 to the light emitting diode 149 as a data signal Dout. In response to this, the phototransistor 147 is turned on / off according to the data signal to return to the electric signal, and is input to the external control circuit 137 as the data signal Din.
  • reception from the external control circuit 137 to the control circuit 113 is performed by an isolated signal transmission unit for data reception (hereinafter, transmission unit) 151.
  • transmission unit for data reception
  • the structure of the transmitter 151 is the transmitter
  • the configuration is the same as 131.
  • a specific data receiving method is as follows. First, the external control circuit 137 transmits data such as a voltage data transmission request of the storage element 101 to the light emitting diode 153 as a data signal Dout. In response to this, the phototransistor 155 is turned on / off according to the data signal to return to the electric signal, and is input to the control circuit 113 as the data signal Din. Through such control, transmission and reception between the control circuit 113 and the external control circuit 137 are performed. That is, the control circuit 113, the switch element 119, the phototransistor 133 151, the light emitting diode 149, and the like correspond to the control circuit 25 in the first embodiment. The external control circuit 137, the light emitting diode 135 153, the phototransistor 147, and the like correspond to the vehicle side control circuit 27.
  • the vehicle power storage device includes the parts surrounded by the thick dotted line in FIG.
  • a main power source 15 that is a power source for charging the power storage element 101 is connected to the power storage device 157 via a main power generation switch 161 and a charge / discharge circuit 163.
  • the charge / discharge circuit 163 is a circuit for charging / discharging the storage element 101.
  • the main power supply 15 is composed of a high voltage secondary battery (for example, a nickel metal hydride battery or a lithium ion battery). Therefore, a high-voltage load 165 such as a starter or a vehicle driving motor of a hybrid vehicle is also connected to the output of the main power supply idler switch 161, for example.
  • the load 165 corresponds to the starter 19 and the load 17 in the first embodiment.
  • the external control circuit 137 Since the charge / discharge circuit 163 is controlled by the external control circuit 137, wiring for transmitting the charge / discharge control signal cont is connected between the two. Note that as in the first embodiment, the external control circuit 137 may control the charge / discharge circuit 163 via the control circuit 113.
  • the charge / discharge circuit 163 is completely turned off between the input and the output when stopped.
  • the main power ignition switch 161 is on / off controlled according to the ignition signal IG from the battery ignition switch 143, so that the wiring for that is connected between the two.
  • ground of power storage device 157 is independent of the ground of other components.
  • Figure 4 shows this by using a different ground symbol.
  • the transmission unit 13 Combined with the use of 1, 145, 151, the power storage device 157 is independent of other circuit configuration capabilities. As a result, for example, when the power storage device 157 fails, it can be replaced with a non-defective power storage device 157 very easily.
  • a configuration in which only one power storage device 157 is provided is shown.
  • a plurality of power storage devices 157 are provided according to the power specifications required by the load 165, and one external control circuit is provided. It may be controlled by the road 137.
  • the power storage device 157 is independent of other circuit configuration powers, a plurality of power storage devices 157 can be connected with an extremely simple configuration.
  • the driver turns on the battery idle switch 143.
  • the main power source Lee mite Chillon switch 161 also Ri Do ON, power is supplied to the load 165. Therefore, for example, the starter operates to drive the engine to start the vehicle.
  • the battery innovation switch 143 sends an external signal IG indicating an ON state to the external control circuit 137.
  • the external control circuit 137 transmits a charge / discharge control signal cont to the charge / discharge circuit 163, and commands to start charging the power storage element 101.
  • the external control circuit 137 transmits an activation signal Wake to the light emitting diode 135 in order to activate the power storage device 157.
  • the light emitting diode 135 of the transmission unit 131 is
  • the connection point between the second resistor 123 and the control circuit 113 is connected to the ground via the phototransistor 133.
  • the voltage at the gate terminal G with respect to the voltage VI at the source terminal S is the resistance value of the first resistor 121 and the second resistor 123.
  • the voltage is lower than the voltage VI.
  • an ON signal is input to the gate terminal G, so that the switch element 119 is turned on.
  • the voltage VI is applied to the regulator 127 via the diode 125, so that the regulator 127 outputs a constant voltage (DC5V). This voltage is supplied to control circuit 113 and switches 109 and 111, and power storage device 157 is activated.
  • the control circuit 113 always keeps the switch element 119 on and continues to supply a constant voltage. Therefore, the control circuit 113 sets the power control signal Lo to the ground level so that the voltage at the connection point between the second resistor 123 and the control circuit 113 maintains the ground level.
  • the storage element 101 is charged with the electric power of the main power supply 15 via the charge / discharge circuit 163.
  • the external control circuit 137 transmits a voltage data transmission request signal Dout to the power storage device 157.
  • the control circuit 113 transmits a voltage selection signal SLV to the switch 109.
  • the switch 109 selects the voltage specified by the voltage selection signal SLV (! / Of VI to Vn), and the control circuit 113 reads the voltage signal Vin.
  • the control circuit 113 reads data of all voltages V ;! to Vn. All voltage data is transmitted from the control circuit 113 to the external control circuit 137 via the transmission unit 145 as a data signal Dout.
  • the external control circuit 137 continues to charge the power storage element 101 while controlling the charge / discharge circuit 163 so as to satisfy the optimum condition from the obtained voltage data until the battery is fully charged.
  • the external control circuit 137 issues a command to the charging / discharging circuit 163 to stop charging. Thereby, activation of power storage device 157 is completed.
  • the main power supply 15 causes a voltage drop, and power cannot be supplied with a stable voltage other than the starter of the load 165. Therefore, the power of the storage element 101 is supplied to the load 165 via the charge / discharge circuit 163 so as to compensate for the voltage drop. As a result, a stable voltage can be continuously supplied to the load 165 even if a voltage drop occurs.
  • the control circuit 113 uses the switches 109 and 111 to switch the voltage of the storage element 101.
  • the lance is controlled to be constant.
  • the control circuit 113 since the control circuit 113 is still driven by the electric power of the storage element 101, the control circuit 113 sets the connection point between the second resistor 123 and the control circuit 113 in order to stop the control circuit 113. Float electrically. As a result, since the source voltage and the gate voltage of the switch element 119 become equal as described above, the switch element 119 is turned off, and the control circuit 113, the switches 109 and 111 are all turned off.
  • switch 109 Since switch 109 has a floating configuration, none of voltages V;! To Vn is selected. Further, none of the transmission units 131, 145, 151 is directly connected to the wiring system of the external control circuit 137. Because of these factors, the power storage element 101 is in an electrically floating state, so that it does not consume power unnecessarily.
  • the external control circuit 137 Since the external control circuit 137 is always operating, the external control circuit 137 measures a predetermined time. When the predetermined time elapses, the external control circuit 137 issues a start signal Wake. As a result, the control circuit 113 receives the activation signal Wake and activates the power storage device 157 described above. By performing the same operation as that at the time, the switch element 119 is turned on. As a result, the electric power of power storage element 101 is stabilized at a constant voltage (DC5V) by regulator 127, and power storage device 157 is activated.
  • DC5V constant voltage
  • the control circuit 113 controls the switch 109 to detect voltages V ;! to Vn. This method is also the same as that at the time of starting the power storage device 157 described above.
  • the control circuit 113 obtains the voltage data power obtained and the voltage across each storage element 101, and controls the switch 111 to operate the balance circuit 103 of the storage element 101 having a high voltage across both ends.
  • the control circuit 113 transmits a switch means selection signal SLB for selecting the switching element 105 of the target storage element 101 by the switch 111.
  • the switch 111 transmits a switching element ON signal Tri (l ⁇ i ⁇ n-1) to the selected switching element 105.
  • Tri a switching element ON signal
  • control circuit 113 completes the voltage balancing operation. At this time, as in the case of the end of use of the vehicle, the control circuit 113 turns off the switch element 119 by electrically floating the connection point with the second resistor 123. As a result, the operation of power storage device 157 is stopped, and the state is the same as when stopped.
  • the control circuit 113 transmits an overdischarge signal to the external control circuit 137 via the transmission unit 145. At the same time, the control circuit 113 stops the voltage balancing operation to avoid shortening the life of the power storage element 101. By receiving the overdischarge signal, the external control circuit 137 does not transmit a start signal Wake for each predetermined time thereafter, and warns the driver that the vehicle is overdischarged when the vehicle is started. This improves reliability.
  • FIG. 5 is a block circuit diagram of the vehicle power storage device according to Embodiment 3 of the present invention.
  • a vehicle power storage device (hereinafter referred to as power storage device) 157A according to the present embodiment is the same as vehicle power storage device 157 according to the second embodiment, except for the following points. Therefore, the same components as those in FIG.
  • a power storage component 173 provided separately from the power storage element unit 102 is connected to the drive voltage input terminal 129 of the control circuit 113A.
  • the control circuit 113A maintains the power saving state when stopped by the power of the power storage component 173.
  • the power storage component 173 has a capacity that allows the control circuit 113A to maintain a power saving state, for example, for about one month.
  • the start signal Wake generated from the external control circuit 137 is transmitted to the start terminal 175 of the control circuit 113 A.
  • the collector terminal of the phototransistor 133 is connected to the output of the S regulator 127.
  • a resistor 177 is connected to the emitter terminal of the phototransistor 133. Further, the connection point between the emitter terminal and the resistor 177 is connected to the start terminal 175 of the control circuit 113A.
  • Power storage component 173 may be a capacitor or a secondary battery, but in this embodiment, a capacitor with a capacitance value of several farads is used!
  • vehicle power storage device 157 having such a configuration will be described with a focus on differences from the second embodiment.
  • main power idling switch 161 is turned on by starting the vehicle.
  • main power idling switch 161 is turned on.
  • the engine is driven, and the external control circuit 137 transmits a charge / discharge control signal cont to the charge / discharge circuit 163 to instruct to start charging the power storage element 101.
  • This operation is the same as in the second embodiment.
  • the external control circuit 137 uses the start signal W to start the power storage device 157 for the vehicle. Send ake.
  • the light emitting diode 135 of the start-up insulated signal transmission unit 131 is
  • the control circuit 113A is in the power saving state until the phototransistor 133 is turned on.
  • the drive voltage to the control circuit 113A at this time is supplied from the power storage component 173.
  • the control circuit 113A in the power saving state has a very small current consumption, the power storage component 173 having a capacity of several farads can be sufficiently driven.
  • the control circuit 113A turns off the switch element 119 and the power switch 179 for the selection switch, and the phototransistors 133 and 155 are off. Therefore, the electric power of power storage component 173 is supplied only to control circuit 113A.
  • the power storage component 173 can drive the control circuit 113A for a long period (approximately one month).
  • control circuit 113A transmits the selection switch power signal SP to turn on the selection switch power switch 179. As a result, power is supplied to the power monitor selection switch 109 and switch 111.
  • power storage device 157A is activated.
  • the subsequent operation is the same as in the second embodiment. That is, the control circuit 113A controls the charging / discharging circuit 163 while monitoring the voltage of each storage element 101 to charge the storage element 101.
  • the external control circuit 137 issues a command to the charging / discharging circuit 163 to stop charging. Thereby, activation of power storage device 157A is completed.
  • the load 165 that consumes a large current operates, the power of the power storage device 101 is supplied to the load 165 via the charge / discharge circuit 163 so as to compensate for the voltage drop of the main power supply 15.
  • a stable voltage can be continuously supplied to the load 165 even if a voltage drop occurs.
  • the voltage of the main power supply 15 returns, and then the power storage element 101 is fully charged again to prepare for the next voltage drop compensation.
  • the control circuit 113A controls the charging so that the voltage balance of the storage element 101 becomes constant by the switch 109 and the switch 111.
  • Turning battery idling switch 143 off also turns main power idling switch 161 off.
  • the power supply to the load 165 is cut off, and an idling signal IG indicating the idling off state is transmitted to the external control circuit 137.
  • the external control circuit 137 transmits the charge / discharge control signal cont and issues a command to completely turn off the input / output of the charge / discharge circuit 163.
  • the power storage element 101 becomes independent from the wiring system of the main power supply 15. Therefore, unnecessary discharge of the power storage element 101 is suppressed.
  • the control circuit 113A is still driven by the electric power of the power storage element 101. Therefore, the control circuit 113A turns off the switch element 119 by setting the power control signal Lo to be electrically floated. At the same time, the control circuit 113A turns off the power switch 179 for the selection switch. As a result, as in Embodiment 2, the power storage element 101 is in an electrically floating state, so that unnecessary discharge is not performed. Thereafter, the control circuit 113A enters the power saving state while receiving the power supply from the power storage component 173, and maintains this state.
  • the external control circuit 137 generates a start signal Wake when a predetermined time elapses.
  • the control circuit 113A receives the activation signal Wake and returns to the normal operation mode by performing the same operation as when the vehicle power storage device 157 is activated.
  • the control circuit 113A turns on the switch element 119 and the power switch 179 for the selection switch.
  • the storage element 10 The electric power of 1 is stabilized at a constant voltage (DC5V) by the regulator 127, and the power storage device 157A is activated.
  • the control circuit 113A controls the switch 109 in the same manner as in the second embodiment to detect the voltages V ;! to Vn. Then, the control circuit 113A controls the switch 111 to operate the balance circuit 103 of the power storage element 101 having a high voltage across both ends. As a result, the electric power of the target storage element 101 is discharged and the voltage decreases. Such an operation is repeated, and when the voltage balance becomes constant, the control circuit 113A completes the voltage balance operation. The subsequent operation is the same as when the vehicle has been used. As a result, the control circuit 113A enters a power saving state, and the vehicle power storage device 157 enters the same state as when stopped.
  • the voltage of the storage element 101 is balanced intermittently. Therefore, it is possible to reduce the possibility of overvoltage of power storage element 101 due to charging in a state where the voltage balance is lost when the vehicle is started, and the reliability is improved.
  • control circuit 113A detects overdischarge of the power storage element 101, the control circuit 113A transmits an overdischarge signal to the external control circuit 137 as in the second embodiment. Also stops the voltage balancing operation. Therefore, reliability is improved.
  • Power storage device 157A requires power storage component 173, power switch 179 for the selection switch, and the like, and is slightly complicated in configuration as compared with vehicle power storage device 157 of the second embodiment. However, since the control circuit 113A is not completely turned off as in the second embodiment and maintains the power saving state at the time of stop, it can be quickly started by the start signal Wake.
  • the force with which a plurality of power storage elements 101 are connected in series is not limited to this.
  • a series-parallel connection may be used according to the required power specifications.
  • 6A and 6B show connection circuit diagrams of the storage element 101 and the balance circuit 103 in this case.
  • FIG. 6A shows a case where three power storage elements 101 are connected in parallel to the balance circuit 103.
  • the power storage element 101 is connected in series and parallel, but the voltage across the three power storage elements 101 in the parallel connection portion is equal, so that the balance circuit 103 is It is not necessary to connect to each power storage element 101. That is, it may be connected to any one of the power storage elements 101 whose voltages at both ends are equal by parallel connection.
  • FIG. 6B shows a case where two storage elements 101 connected in parallel to the balance circuit 103 are connected in series in two stages. In this case, among the series-parallel connections of the entire storage element 101, the voltage across the storage element 101 is different in the series connection part. Become. Therefore, it is not necessary to connect the balance circuit 103 to each power storage element 101. Therefore, as shown in FIG. 6B, for example, every six balance circuits 103 may be connected.
  • the balance circuit 103 is not necessarily connected to each power storage element 101, and the balance circuit 103 may be connected to each of the plurality of power storage elements 101 as a group.
  • the power storage device for vehicles as an auxiliary power source for vehicles has been described as an example, but the present invention can be applied not only to vehicles but also to general emergency backup power sources.
  • the specific control using the balance circuit 103 shown in the second and third embodiments may be applied independently of the control that is characteristic in the vehicle power storage device of the first embodiment.
  • the control that is characteristic in the first embodiment is the discharge control up to the predetermined holding voltage (Vk) of the power storage unit at the end of use, the holding control at the predetermined holding voltage (Vk), and It means full charge control using driver authentication. That is, the control using the balance circuit 103 described in the second and third embodiments may be applied to the vehicle power storage device that does not perform the above-described control, which is a feature of the first embodiment.
  • Embodiment 1 shows a configuration in which power storage device 11 is connected in series between main power supply 15 and load 17.
  • Embodiments 2 and 3 show a configuration in which power storage devices 157 and 157A are connected in parallel between main power supply 15 and load 165. That is, power storage devices 157 and 157A are connected to the connection portion between main power supply 15 and load 165. However, this may be a reverse connection method. Therefore, power storage device 11 and power storage devices 157 and 157A may be connected between main power supply 15 and loads 17 and 165 by either a serial or parallel connection method.
  • the vehicle power storage device can fully charge the power storage unit at an early stage, and can suppress unnecessary discharge of the main power source and the power storage element. Reliability is improved by automatically performing intermittent voltage balancing. Therefore, it is particularly useful as a vehicle power storage device or the like as an auxiliary power source that supplies power from the power storage unit when the voltage of the main power source drops.

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  • Secondary Cells (AREA)

Abstract

L'invention concerne un dispositif de stockage de véhicule connecté entre une alimentation principale et une charge comprenant une partie de stockage, un circuit de charge/décharge et un circuit de commande. La partie de stockage stocke la puissance de l'alimentation électrique principale. Le circuit de charge/décharge est connecté à l'alimentation électrique principale, à la charge, et à la partie de stockage. Le circuit de commande est connecté à la partie de stockage et au circuit de charge/décharge. Le circuit de commande commande le circuit de charge/décharge, de telle sorte que la partie de stockage décharge la puissance jusqu'à ce que la tension de la partie de stockage atteigne une tension de maintien prédéterminée après l'écoulement d'un temps prédéterminé à la fin de l'utilisation du véhicule. Si la tension de la partie de stockage atteint une tension limite inférieure prédéterminée lorsque le véhicule n'est pas en utilisation, le circuit de commande commande le circuit de charge/décharge de façon à répéter l'opération de charge jusqu'à ce que la tension de la partie de stockage atteigne la tension de maintien prédéterminée. En outre, s'il est reçu un signal pour reconnaître le conducteur de l'extérieur du dispositif de stockage de véhicule, le circuit de commande commande le circuit de charge/décharge de telle sorte qu'il charge complètement la partie de stockage.
PCT/JP2007/069227 2006-10-02 2007-10-02 Dispositif de stockage de véhicule et système utilisant celui-ci WO2008041684A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2006270390A JP5250953B2 (ja) 2006-10-02 2006-10-02 蓄電回路
JP2006-270390 2006-10-02
JP2006325190A JP5055984B2 (ja) 2006-12-01 2006-12-01 蓄電装置
JP2006-325190 2006-12-01

Publications (1)

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WO2008041684A1 true WO2008041684A1 (fr) 2008-04-10

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
JP2010040256A (ja) * 2008-08-01 2010-02-18 Toyota Motor Corp リチウムイオン二次電池の制御方法、及び、リチウムイオン二次電池システム
CN105246750A (zh) * 2013-05-29 2016-01-13 日产自动车株式会社 插电混合动力车辆的控制装置
US11447108B1 (en) * 2017-10-30 2022-09-20 Creed Monarch, Inc. Braking control system and method to sysnchronize the operation of the braking of a towed vehicle

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JP2001145275A (ja) * 1999-11-16 2001-05-25 Toyota Motor Corp 車両用電源回路
JP2002354703A (ja) * 2001-05-25 2002-12-06 Toyota Motor Corp 車両用二次電池制御装置
JP2003348769A (ja) * 2002-05-27 2003-12-05 Hitachi Eng Co Ltd 車載システム用電源回路
JP2005318751A (ja) * 2004-04-30 2005-11-10 Shin Kobe Electric Mach Co Ltd 多直列電池制御システム

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Publication number Priority date Publication date Assignee Title
JP2001145275A (ja) * 1999-11-16 2001-05-25 Toyota Motor Corp 車両用電源回路
JP2002354703A (ja) * 2001-05-25 2002-12-06 Toyota Motor Corp 車両用二次電池制御装置
JP2003348769A (ja) * 2002-05-27 2003-12-05 Hitachi Eng Co Ltd 車載システム用電源回路
JP2005318751A (ja) * 2004-04-30 2005-11-10 Shin Kobe Electric Mach Co Ltd 多直列電池制御システム

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010040256A (ja) * 2008-08-01 2010-02-18 Toyota Motor Corp リチウムイオン二次電池の制御方法、及び、リチウムイオン二次電池システム
KR101167801B1 (ko) 2008-08-01 2012-07-25 도요타지도샤가부시키가이샤 리튬 이온 2차 전지의 제어 방법 및 리튬 이온 2차 전지 시스템
US8384345B2 (en) 2008-08-01 2013-02-26 Toyota Jidosha Kabushiki Kaisha Control method for lithium ion secondary battery, and lithium ion secondary battery system
CN105246750A (zh) * 2013-05-29 2016-01-13 日产自动车株式会社 插电混合动力车辆的控制装置
US11447108B1 (en) * 2017-10-30 2022-09-20 Creed Monarch, Inc. Braking control system and method to sysnchronize the operation of the braking of a towed vehicle

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