JP2015208225A - Charge/discharge system - Google Patents

Charge/discharge system Download PDF

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Publication number
JP2015208225A
JP2015208225A JP2015141947A JP2015141947A JP2015208225A JP 2015208225 A JP2015208225 A JP 2015208225A JP 2015141947 A JP2015141947 A JP 2015141947A JP 2015141947 A JP2015141947 A JP 2015141947A JP 2015208225 A JP2015208225 A JP 2015208225A
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Japan
Prior art keywords
charge
battery
power supply
charging
discharging
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JP2015141947A
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Japanese (ja)
Inventor
敏英 佐竹
Toshihide Satake
敏英 佐竹
松永 隆徳
Takanori Matsunaga
隆徳 松永
大久保 陽一
Yoichi Okubo
陽一 大久保
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三菱電機株式会社
Mitsubishi Electric Corp
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Priority to JP2015141947A priority Critical patent/JP2015208225A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7005Batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies related to electric vehicle charging
    • Y02T90/16Information or communication technologies improving the operation of electric vehicles
    • Y02T90/167Systems 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]
    • Y02T90/168Remote or cooperative charging operation
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S30/00Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/12Remote or cooperative charging

Abstract

PROBLEM TO BE SOLVED: To provide a charge/discharge system capable of suppressing deterioration of a component by reducing power consumption even when being connected to a smart grid for a long time.SOLUTION: A charge/discharge system mounted on an electric vehicle 1 having a motor 7 driven by power stored in a battery 4 as a driving source controls at least one of charging the battery from the outside of the vehicle and discharging the battery 4 to the outside of the vehicle. The charge/discharge system comprises a power supply unit 9 for controlling power supply so that power is supplied only to a part contributing to charging/discharging of parts connected to a wiring system of driving power of the motor 7, in performing charging/discharging the battery from/to the outside of the vehicle.

Description

  The present invention relates to a charge / discharge system, and more particularly, to a charge / discharge system for a battery of an electric vehicle.

  In recent years, the development of next-generation power networks called “smart grids” has attracted attention. The smart grid has one purpose of optimizing the supply and demand of electric power. As shown in Patent Document 1, the battery of an electric vehicle (electric vehicle) is a buffer that reduces the peak of electric power demand in each household. It has been proposed to be used as

  For example, by charging the battery of the electric vehicle during a time period when the power demand is low and discharging from the battery of the electric vehicle at the peak of the power demand, the peak of the power demand can be reduced. Moreover, since the power cost is generally low during a time period when the power demand is low, using the power charged during that time period during a time period when the power cost is high also leads to saving of electricity charges for each household. Moreover, it can be used as an emergency power source by discharging from the battery of an electric vehicle in the event of an emergency such as a power failure.

  Patent Documents 2 and 3 show an example of the configuration of a conventional electric vehicle. The high-voltage wiring system of these electric vehicles is connected to a vehicle drive battery, high-voltage system equipment (drive motor control device and on-vehicle charger), a high-voltage relay, etc., and a charge / discharge gun is connected to the vehicle. Thus, power is supplied to all devices related to the high voltage wiring system.

  Here, the electric vehicle includes an electric vehicle that obtains power by driving a motor using electric power charged in a secondary battery (hereinafter referred to as “battery”) as a drive source, and a plug-in that uses both an engine and a motor. There are hybrid vehicles (PHEV).

JP 2012-85383 A JP 2012-85432 A JP 2011-182518 A

  In the conventional electric vehicle as described above, it is not assumed that the electric vehicle is connected to the smart grid and charging / discharging is performed for a long time, and when the charge / discharge gun is connected to the vehicle, Since all devices related to the high-voltage wiring system are turned on, when connected to the smart grid, power to devices not related to charging / discharging such as the drive motor controller is turned on for a long time. Will be. As a result, there arises a problem that power is wasted and the deterioration of the components proceeds quickly.

  The present invention was made to solve the above-described problems, and provides a charge / discharge system that can reduce power consumption and suppress deterioration of components even when connected to a smart grid for a long time. Objective.

  A charge / discharge system according to the present invention is mounted on an electric vehicle that uses a power charged in a battery to drive a motor as a drive source, and charges the battery from the outside of the vehicle and discharges from the battery to the outside of the vehicle. A charging / discharging system for controlling at least one of the parts connected to a wiring system for driving power of the motor when charging / discharging the battery with respect to the outside of the vehicle. Among them, a power supply unit that controls power supply so as to supply power only to a portion that contributes to charge / discharge, the charge / discharge system includes a charge / discharge control unit that controls charge / discharge of the battery, A battery management unit for monitoring the state, and the power supply unit is configured to charge the battery with the outside of the vehicle. When electricity is supplied, power is supplied only to the charge / discharge control unit and the battery management unit, and the power supply unit receives an ignition signal output when an ignition switch for starting the electric vehicle is turned on. And a dedicated cable for charging / discharging the battery with respect to the outside of the vehicle is connected to the electric vehicle, the charge / discharge control unit, the battery management unit, and the motor are temporarily controlled. The power supply to the drive motor control unit is performed, and the charge / discharge control unit, the battery management unit, and the drive motor control unit perform their own operation checks so that the dedicated cable, the charge / discharge control unit, and the battery The motor between the drive motor controller and the motor. The abnormality inspection of the wiring system of the motor drive power.

  According to the charging / discharging system of the present invention, when charging / discharging the battery with respect to the outside of the vehicle, the power supply unit that controls the power supply so as to supply power only to the portion that contributes to charging / discharging. Therefore, even when connected to the smart grid for a long time, power consumption can be reduced and deterioration of components can be suppressed. In addition, when the ignition signal is received and when the dedicated cable is connected to the electric vehicle, it is possible to check whether there is an abnormality in the entire system when the vehicle starts, and the startup sequence during running and charging / discharging Can be made common and software can be simplified.

It is a block diagram which shows the structure of the electric vehicle 1 provided with the charging / discharging system of embodiment which concerns on this invention. It is a flowchart explaining the operation | movement at the time of charging / discharging of the charging / discharging system of embodiment which concerns on this invention. It is a flowchart explaining the operation | movement at the time of driving | running | working of the charging / discharging system of embodiment which concerns on this invention. It is a block diagram which shows an example of the charging / discharging system which has a high voltage relay in the high voltage wiring system. It is a block diagram which shows an example of the charging / discharging system which used one power supply part. It is a flowchart explaining the change operation | movement of the power supply destination in a power supply part. It is a block diagram which shows an example of the charging / discharging system provided with the site | part which performs mediation operation with respect to a power supply part. It is a flowchart explaining the mediation operation | movement with respect to the power supply part by a power supply mediation part. It is a flowchart explaining the operation | movement of an abnormality test | inspection of a high voltage wiring system.

<Embodiment>
<Device configuration>
FIG. 1 is a block diagram illustrating a configuration of an electric vehicle 1 including a charge / discharge system according to an embodiment of the present invention.

  As shown in FIG. 1, the electric vehicle 1 is configured to exchange power with a smart grid charge / discharge compatible device 2 installed outside the vehicle via a charge / discharge gun GN. The smart grid charge / discharge compatible device 2 includes a charging stand provided in a public facility or factory facility and a connection device with a smart grid provided in a home.

  The smart grid charge / discharge compatible device 2 and the electric vehicle 1 are electrically connected by a charge / discharge gun GN. The charge / discharge gun GN is connected to the vehicle connection unit 3, and includes high-voltage wiring for transferring power between the smart grid charge / discharge compatible device 2 and the electric vehicle 1, and the smart grid charge / discharge compatible device 2. It is a dedicated cable for charging / discharging having a signal line for exchanging signals with the electric vehicle 1. In the block diagrams of FIG. 1 and subsequent figures, high voltage wiring, which is a wiring system for distributing the driving power of the motor, is indicated by a thick solid line, a power line of each device is indicated by a thin solid line, and a signal line is indicated by a broken line. To do.

  The electric vehicle 1 includes a drive motor 7 that is a power source of the electric vehicle 1, a battery 4 that is an electric power source thereof, and a drive motor control unit 8 that controls the drive motor 7 by controlling electric power applied to the drive motor 7. A battery management unit (BMU) 5 for monitoring the state of charge, temperature, etc. of the battery 4, charging from the smart grid charge / discharge compatible device 2 to the battery 4, and from the battery 4 to smart grid charge / discharge compatible device 2 A power supply unit 9 (first power supply unit) for supplying power to the BMU 5 and the charge / discharge control unit 6, and a power supply to the BMU 5 and the drive motor control unit 8 A power supply unit 10 (second power supply unit) is provided. The power supply unit 10 is configured to receive an ignition signal from an ignition switch 11 operated by a driver when the electric vehicle 1 is driven. Further, the power supply unit 9 is configured to receive a connection signal output from the vehicle connection unit 3 when the charge / discharge gun GN is connected to the vehicle connection unit 3. In addition, the structure mentioned above is only the structure regarding this invention, and it has abbreviate | omitted about the structure with a thin relationship with invention.

<Device operation>
Next, operation | movement of the charging / discharging system of embodiment which concerns on this invention is demonstrated. First, the operation | movement at the time of charging / discharging is demonstrated using the flowchart shown in FIG.

  When charging / discharging the battery 4, the charge / discharge gun GN attached to the smart grid charge / discharge compatible device 2 is connected to the vehicle connection portion 3. The supply unit 9 detects the connection of the charge / discharge gun GN (step S1). This is realized by providing a connection signal output from the vehicle connection unit 3 to the power supply unit 9 when the charge / discharge gun GN is connected, and detecting the connection signal by the power supply unit 9.

  Then, using the connection detection of the charge / discharge gun GN as a trigger, the power supply unit 9 starts supplying power (generally 12 to 14 V) to the BMU 5 and the charge / discharge control unit 6, and the BMU 5 and charge / discharge The control unit 6 is activated (step S2). Since detection of connection of the charge / discharge gun GN is used as a trigger for power supply, it is possible to control power supply relatively easily.

  The charge / discharge control unit 6 receives a charge / discharge instruction from the smart grid charge / discharge compatible device 2 via a signal line, and charges or charges the battery 4 based on the battery state information given from the BMU 5. Discharge is controlled (step S3).

  Here, the battery state information given from the BMU 5 is, for example, the current storage capacity and voltage of the battery 4, and if those values are equal to or greater than a predetermined value, charging is not performed to prevent overcharging. Alternatively, control is performed to reduce the charging current. On the other hand, if the current storage capacity or voltage of the battery 4 is smaller than a predetermined value, control is performed not to discharge in order to prevent overdischarge.

  Further, the battery state information includes the temperature of the battery 4, and if the current temperature is equal to or higher than a predetermined value, control is performed such that charging is not performed or charging current is reduced to prevent overheating. The information on the “battery storage capacity”, “battery voltage”, and “battery temperature” described above is periodically transmitted from the BMU 5 to the charge / discharge control unit 6.

  When charging / discharging with respect to the battery 4 is completed and the charging / discharging gun GN is removed from the vehicle connection unit 3, the power supply unit 9 detects that the charging / discharging gun GN has been removed (step S4). This is realized by disconnecting the connection signal from the vehicle connection unit 3 by removing the charge / discharge gun GN and detecting it by the power supply unit 9.

  And the power supply part 9 which detected that the charging / discharging gun GN was removed stops the power supply with respect to BMU5 and the charging / discharging control part 6, and operation | movement of BMU5 and the charging / discharging control part 6 is complete | finished (step S5). .

  Next, the operation during vehicle travel will be described using the flowchart shown in FIG. When the driver turns on the ignition switch 11 when starting the traveling of the electric vehicle 1, the power supply unit 10 detects that the ignition switch 11 is turned on (step S11). This is realized when an ignition signal output by turning on the ignition switch 11 is given to the power supply unit 10 and the power supply unit 10 detects the ignition signal.

  Then, using the ON detection of the ignition switch 11 as a trigger, the power supply unit 10 starts supplying power to the BMU 5 and the drive motor control unit 8, and the BMU 5 and the drive motor control unit 8 are activated (step S12). The ignition switch 11 has an off position where an ignition key is inserted and removed, an accessory position where an accessory device such as a car audio is operated, a start position where a drive motor is activated, and the like. 11 ON indicates a state in which the ignition key is turned to the start position for starting the drive motor.

  The drive motor control unit 8 controls the drive motor 7 based on the driver's accelerator (not shown) and brake pedal (not shown) operation and the battery status received from the BMU 5. Thereby, the electric vehicle 1 travels (step S13).

  When the driver turns off the ignition switch 11 when the traveling of the electric vehicle 1 is finished, the power supply unit 10 detects that the ignition switch 11 is turned off (step S14). This is realized by turning off the ignition switch 11 to give an OFF signal to the power supply unit 10 and detecting it by the power supply unit 10.

  And the power supply part 10 which detected OFF of the ignition switch 11 stops the power supply with respect to BMU5 and the drive motor control part 8, and operation | movement of BMU5 and the drive motor control part 8 is complete | finished (step S15).

  As described above, in the charge / discharge system according to the embodiment of the present invention, at the time of charge / discharge, power is supplied only to the portion related to charge / discharge from the smart grid charge / discharge compatible device 2 to the battery 4 outside the vehicle, Since no power is supplied to the drive motor control unit 8, the drive motor control unit 8 does not consume power, and the deterioration of components of the drive motor control unit 8 does not progress quickly.

<Modification 1>
In the embodiment described above, the configuration in which the high voltage relay is not provided in the high voltage wiring system is shown, but the high voltage relay is arranged at an appropriate position, and the charge / discharge control unit 6, the drive motor control unit 8, etc. It is good also as a structure which carries out ON / OFF control of a high voltage relay.

  FIG. 4 is a block diagram showing an example of a charge / discharge system having a high voltage relay in a high voltage wiring system. As shown in FIG. 4, in the electric vehicle 1 </ b> A, a high voltage relay 15 is inserted in a high voltage wiring between the drive motor control unit 8 and the battery 4, and a high voltage between the battery 4 and the charge / discharge control unit 6 is obtained. The high voltage relay 16 is inserted in the voltage wiring. In addition, the same code | symbol is attached | subjected about the structure same as the electric vehicle 1 shown in FIG. 1, and the overlapping description is abbreviate | omitted.

  By adopting such a configuration, for example, when some abnormality occurs in the charge / discharge control unit 6, the charge / discharge control unit 6 turns off the high-voltage relay 16 and electrically connects the battery 4 and the charge / discharge control unit 6. It is possible to protect the battery 4 and the charge / discharge control unit 6 by separating them.

  Further, when any abnormality occurs in the drive motor control unit 8, the drive motor control unit 8 turns off the high voltage relay 15 and electrically disconnects the battery 4 and the drive motor control unit 8, thereby It becomes possible to protect the drive motor control unit 8.

<Modification 2>
In the embodiment described above, the power supply units 9 and 10 are used to change the power supply destination during charging / discharging and when the vehicle travels. However, the number of power supply units is one, and an ignition is used. The power supply destination may be changed in accordance with the signal or the connection signal of the charge / discharge gun GN.

  FIG. 5 is a block diagram showing an example of a charge / discharge system with one power supply unit. As shown in FIG. 5, in the electric vehicle 1 </ b> B, the power supply to the BMU 5, the charge / discharge control unit 6 and the drive motor control unit 8 is performed by the power supply unit 21. The power supply unit 21 distributes the power supply.

  The power supply unit 21 is configured to receive an ignition signal from the ignition switch 11 and a connection signal output from the vehicle connection unit 3 when the charge / discharge gun GN is connected to the vehicle connection unit 3. ing.

  By adopting such a configuration, it is possible to reduce the number of power supply units and suppress an increase in manufacturing cost.

  Hereinafter, the operation of changing the power supply destination in the power supply unit 21 will be described with reference to the flowchart shown in FIG.

  The power supply unit 21 periodically performs an operation to check whether the connection signal of the charge / discharge gun GN is output from the vehicle connection unit 3 and whether the ignition signal is output from the ignition switch 11. If it is determined that the charge / discharge gun GN is connected to the vehicle connection unit 3 and the ignition is OFF (no ignition signal is provided), the BMU 5 and the charge / discharge control unit 6 are Power supply is started (step S22).

  On the other hand, when it is determined in step S21 that the charge / discharge gun GN is connected to the vehicle connection unit 3 and the ignition is not OFF, the process proceeds to step S23.

  In step S23, when it is determined that the charge / discharge gun GN is not connected to the vehicle connection unit 3 and the ignition is ON (ignition signal is given), the power is supplied to the BMU 5 and the drive motor control unit 8. Supply is started (step S24).

  On the other hand, if it is determined in step S23 that the charge / discharge gun GN is not connected to the vehicle connection unit 3 and the ignition is not ON, the process proceeds to step S25, where the BMU 5, the charge / discharge control unit 6 and the drive motor control unit The power supply to 8 is stopped.

  In this case, there are a case where the charge / discharge gun GN is connected to the vehicle connection unit 3 and the ignition is ON, and a case where the charge / discharge gun GN is not connected to the vehicle connection unit 3 and the ignition is OFF. However, in the former case, the power supply to all parts is stopped in order to prevent the electric vehicle from running while connected to the smart grid charge / discharge compatible device 2. In the latter case, Then, charging / discharging is not performed with the smart grid charging / discharging compatible device 2, and power supply to all parts is stopped on the assumption that there is no intention of traveling.

<Modification 3>
Further, in the embodiment described above, the control (first control) in which the power supply unit 10 starts supplying power to the BMU 5 and the drive motor control unit 8 triggered by the ON detection of the ignition switch 11 is used. As described above, when the ignition switch 11 is turned on while the charge / discharge gun GN is connected, a control (second control) for stopping the power supply to the drive motor control unit 8 is performed. In addition, when the charge / discharge gun GN is connected in a state where power is supplied to the drive motor control unit 8, control (third control) is performed to stop power supply to the charge / discharge control unit 6. Anyway.

  FIG. 7 is a block diagram illustrating an example of a charge / discharge system including a portion that performs an arbitration operation on the power supply units 9 and 10. As shown in FIG. 7, the electric vehicle 1 </ b> C includes a power supply arbitration unit 31 that performs an arbitration operation on the power supply units 9 and 10, and an ignition signal is given to the power supply arbitration unit 31 from the ignition switch 11. In addition, a connection signal is given from the vehicle connection unit 3. The power supply arbitration unit 31 is configured to give a control signal to the power supply units 9 and 10 and to receive a signal indicating an operation state from the power supply units 9 and 10.

  By adopting such a configuration, when the ignition switch 11 is turned on while the charge / discharge gun GN is connected, the power supply to the drive motor control unit 8 is stopped, and the drive motor When the charging / discharging gun GN is connected while power is being supplied to the control unit 8, the power supply to the charging / discharging control unit 6 is stopped, so that the charging / discharging compatible device 2 for smart grid is connected. The electric vehicle is prevented from traveling in the

  The arbitration operation for the power supply units 9 and 10 by the power supply arbitration unit 31 will be described below using the flowchart shown in FIG.

  The power supply arbitration unit 31 periodically performs an operation of confirming whether the connection signal of the charge / discharge gun GN is output from the vehicle connection unit 3 and whether the ignition signal is output from the ignition switch 11. If it is determined in step S31 that the charge / discharge gun GN is connected to the vehicle connection unit 3, it is confirmed whether or not the power supply unit 10 is supplying power to a predetermined part (step S31). S32). If it is determined in step S32 that the power supply unit 10 is not supplying power, the power supply unit 9 is controlled to start supplying power to the BMU 5 and the charge / discharge control unit 6 (step S33). Proceed to S34. If it is determined in step S32 that the power supply unit 10 is supplying power, the process proceeds to step S34.

  On the other hand, if it is determined in step S31 that the charge / discharge gun GN is not connected to the vehicle connection unit 3, the power supply unit 9 is controlled to stop the power supply to the BMU 5 and the charge / discharge control unit 6 (step S31). S37), the process proceeds to step S34.

  In step S34, the power supply arbitration unit 31 determines whether or not the ignition is ON (ignition signal is given). If it is determined that the ignition is ON, the power supply unit 9 supplies power to a predetermined part. Is checked (step S35). If it is determined in step S35 that the power supply unit 9 is not supplying power, the power supply unit 10 is controlled to start supplying power to the BMU 5 and the drive motor control unit 8 (step S36).

  On the other hand, if it is determined in step S34 that the ignition is OFF, the power supply unit 10 is controlled to stop the power supply to the BMU 5 and the drive motor control unit 8 (step S38).

  If it is determined in step S35 that the power supply unit 9 is supplying power, charging / discharging is continued.

<Modification 4>
In the embodiment described above, the charging / discharging gun GN is connected to and removed from the vehicle connecting portion 3 as a trigger, and charging / discharging start and end (power supply start and end) are determined. The start and end of charge / discharge may be determined according to the contents of communication with devices outside the vehicle such as the smart grid charge / discharge compatible device 2.

  That is, control signals such as a charge start instruction, a charge current instruction, a charge end instruction, a discharge start instruction, a discharge current instruction, and a discharge end instruction are transmitted from a device outside the vehicle such as the smart grid charge / discharge compatible device 2 to the power supply unit 9. May be configured to determine the start and end of charge and discharge. These control signals may also be given to the charge / discharge control unit 6 to control the charge current and the discharge current.

  By adopting such a configuration, it is possible not only to determine the start and end of charging / discharging, but also to control charging current and discharging current.

<Modification 5>
Further, in the embodiment described above, the configuration in which power is not supplied to the drive motor control unit 8 at the time of charging / discharging has been described. However, before charging / discharging, from the smart grid charging / discharging compatible device 2 to the battery 4 before charging / discharging. In addition to the parts related to charging / discharging (charging / discharging control unit 6, BMU5), the other part (driving motor control unit 8) is also supplied with power once to check the abnormality of the high-voltage wiring system in the electric vehicle. It is good also as a structure to perform.

  By adopting such a configuration, it is possible to check whether there is an abnormality in the entire system when the vehicle is started (when the charging gun is connected or when the ignition is turned on), and the startup sequence during driving and charging / discharging is shared. And can simplify the software.

  Hereinafter, the operation of the abnormality inspection of the high-voltage wiring system will be described using the flowchart shown in FIG.

  When the power supply unit 9 detects the connection of the charge / discharge gun GN or the power supply unit 10 detects the ignition switch 11 being turned on, the power supply unit 9 supplies power to the BMU 5 and the charge / discharge control unit 6. The power supply unit 10 starts supplying power to the BMU 5 and the drive motor control unit 8 (step S41). The BMU 5 is configured to shut off one of the power supply units 9 and 10 when power is supplied from both.

  Then, the activated BMU 5, the charge / discharge control unit 6 and the drive motor control unit 8 perform an abnormality inspection of the high voltage wiring system (step S42) and confirm whether there is an abnormality in the high voltage wiring system (step S43). This is executed by the BMU 5, the charge / discharge control unit 6 and the drive motor control unit 8 performing their own operation checks. When an abnormality is found in the high voltage wiring system, the power supply units 9 and 10 stop supplying power (step S46).

  On the other hand, if no abnormality is found in the high voltage wiring system, it is confirmed whether or not the charge / discharge gun GN is connected in the power supply unit 9 (step S44), and the charge / discharge gun GN is connected. If determined, the power supply unit 10 stops the power supply (step S45). In this case, information is exchanged between the power supply units 9 and 10, and the power supply unit 10 stops supplying power when information on the connection of the charge / discharge gun GN is given to the power supply unit 10. What is necessary is just to comprise so.

  If it is determined in step S44 that the charge / discharge gun GN is not connected, the ignition switch 11 is ON, and the power supply unit 9 stops supplying power (step S47).

  By such an operation, after performing an abnormality inspection of the high-voltage wiring system of the electric vehicle, the power supply of the charge / discharge control unit 6 unnecessary for traveling is turned off when traveling, and charging / discharging is performed when charging / discharging. The power supply of the unnecessary drive motor control unit 8 is turned off.

<Modification 6>
Moreover, in embodiment described above, it demonstrated as a charging / discharging system which performs both the charge from the charging / discharging apparatus 2 for smart grids to the battery 4, and the discharge from the battery 4 to the charging / discharging apparatus 2 for smart grids. However, the present invention is also applicable to a system that performs only one of charging and discharging.

  In the present invention, the embodiments can be appropriately modified and omitted within the scope of the invention.

  1, 1A, 1B, 1C Electric vehicle, 4 battery, 5 battery management unit (BMU), 6 charge / discharge control unit, 7 drive motor, 8 drive motor control unit.

Claims (3)

  1. A charge / discharge system that is mounted on an electric vehicle that uses a power charged in a battery to drive a motor as a drive source and controls at least one of charging from the outside of the vehicle to the battery and discharging from the battery to the outside of the vehicle. There,
    The charge / discharge system includes:
    When charging / discharging the battery to / from the outside of the vehicle, power is supplied so that power is supplied only to the portion that contributes to charging / discharging among the portions connected to the wiring system of the driving power of the motor A power supply unit for controlling
    The charge / discharge system includes:
    A charge / discharge control unit for controlling charge / discharge of the battery;
    A battery management unit for monitoring the state of the battery,
    The power supply unit
    When charging / discharging the battery with the outside of the vehicle, power is supplied only to the charge / discharge control unit and the battery management unit,
    The power supply unit
    When an ignition signal output when an ignition switch for starting the electric vehicle is turned on is received, and when a dedicated cable for charging / discharging the battery to / from the outside of the vehicle is connected to the electric vehicle On the other hand, once the power supply to the drive motor control unit for controlling the charge / discharge control unit and the battery management unit and the motor,
    The charge / discharge control unit, the battery management unit, and the drive motor control unit perform their own operation checks so that the dedicated cable, the charge / discharge control unit, the battery, the drive motor control unit, and the motor The charging / discharging system which performs the abnormality test | inspection of the said wiring system of the drive electric power of the said motor.
  2. The power supply unit
    2. The charge / discharge system according to claim 1, wherein the start and end of power supply are controlled by using, as a trigger, connection and removal of a dedicated cable for charging / discharging the battery from / to the outside of the vehicle. .
  3. The power supply unit
    The start and end of power supply are respectively controlled based on a control signal given from the outside of the vehicle via a dedicated cable for charging and discharging between the battery and the outside of the vehicle. Charge / discharge system.
JP2015141947A 2015-07-16 2015-07-16 Charge/discharge system Pending JP2015208225A (en)

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JP2012188483 Division 2012-08-29

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