JP5258920B2 - Charge / discharge system - Google Patents

Description

  The present invention relates to a charge / discharge system for managing charge / discharge of an electric vehicle such as an electric vehicle.

  In an electric vehicle (hereinafter referred to as an EV) such as an electric vehicle that obtains power by driving a motor using electric power charged in a secondary battery (battery) or a hybrid vehicle that uses an engine and a motor together, An electronic control unit (ECU) is used to perform control, but the ECU has not only control of the motor but also a function of monitoring the state of the battery when charging and discharging the battery, In many cases, the ECU is responsible not only for monitoring but also for charge / discharge control.

  Here, in recent years, in a dedicated charging facility (charging station), the battery is quickly charged with direct current (DC) power by a quick charger and the battery is charged with alternating current (AC) power from a household power outlet. The number of EVs that use AC charging for charging is increasing.

  In the case of DC charging, it is possible to charge the battery directly, but for AC charging, it is necessary to mount an in-vehicle charger with a built-in AC / DC converter, and the in-vehicle charger is controlled. There is also a need.

  As described above, in an EV that uses AC charging, in order to realize charging (or discharge to the outside of the vehicle), a configuration and a control device that are not required in DC charging are required. Discharge system) and control become complicated.

  For example, FIG. 1 of Patent Document 1 discloses a configuration in which a battery of a hybrid vehicle is DC charged from an external charging device, and FIG. 3 discloses a configuration of a control device, in which various power supply systems are provided. A power supply ECU for controlling, an HV-ECU for controlling a hybrid device related to the operation of a motor generator, a battery ECU for managing the state of charge of a battery, and the like are disclosed. Need.

  In order to charge / discharge the battery as described above, a plurality of ECUs are involved, and in order to construct a charge / discharge system, development in cooperation with the plurality of ECUs is required.

  Also, because EV is currently under development, the interface with the charging device outside the vehicle is not standardized, varies depending on the country or region, and the specifications are frequently changed. When the interface specifications are changed, it is necessary to change not only a plurality of ECUs related to charging, but also the devices controlled by the corresponding ECUs, and there is a problem that the cost associated with the specification changes becomes significant. It was.

JP 2010-187423 A

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a charge / discharge system that can cope with a low cost even when the interface with a charging device outside the vehicle is changed.

  An aspect of a charge / discharge system according to the present invention is a charge / discharge system for an electric vehicle that travels by driving a motor using electric power charged in a battery as a drive source, and connection and disconnection between the electric vehicle and an external power supply system. And an external communication for performing communication control between the external power supply system and connection state detection means for outputting connection state information indicating whether the connected external power supply system is an AC power supply system or a DC power supply system An external connection interface device having a control means, and a control power supply monitor for controlling on / off of control power of a device involved in charging / discharging of the battery based on the connection state information output from the external connection interface device And the control power supply monitoring device, and the electric vehicle is connected to the AC power supply system. In this case, the charging / discharging control unit controls charging / discharging of AC power, and when the electric vehicle is connected to the DC power supply system, the charging / discharging monitoring device controls charging / discharging of DC power in one unit. The management device and the charge / discharge management device are provided as separate units. The drive control device controls the drive of the motor drive device that drives the motor. And an AC charging / discharging device that charges and discharges AC power.

  According to the aspect of the charge / discharge system according to the present invention, since the external connection interface device, the control power supply monitoring device, and the charge / discharge monitoring device constitute one unit as the charge / discharge management device, the specification of the interface with the external power supply system is Even if it is changed, if the unitized charge / discharge management device is changed to one that matches the changed specifications, the external power supply system can be connected to the external power supply system at low cost without changing the drive control device and AC charge / discharge device. It is possible to deal with changes in the interface specifications.

It is a block diagram which shows the structure of the charging / discharging system used as the premise of the charging / discharging system which concerns on this invention. It is a block diagram which shows the structure of the charging / discharging system of embodiment which concerns on this invention. It is a figure which shows an example of arrangement | positioning at the time of incorporating the charging / discharging system of embodiment which concerns on this invention in EV. It is a flowchart explaining the operation | movement at the time of AC 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 DC charging / discharging of the charging / discharging system of embodiment which concerns on this invention. It is a flowchart explaining the operation | movement of charging / discharging at the time of driving | running | working of EV of the charging / discharging system of embodiment which concerns on this invention.

<Introduction>
Prior to the description of the embodiment according to the present invention, a premise technique of an EV charge / discharge system using both DC charging and AC charging will be described.

  FIG. 1 is a block diagram showing a configuration of a charge / discharge system 90 which is a premise of the charge / discharge system according to the present invention. As shown in FIG. 1, the charge / discharge system 90 includes an in-vehicle charge / discharge controller 70 that receives AC power from the outside via an AC connector 7, converts the power into DC power, and outputs the power, and externally via a DC connector 8. And an EV control device 80 that performs control when the battery 3 is charged with the input DC power and the DC power output from the in-vehicle charge / discharge controller 70.

  The EV includes a motor 1, an inverter, and the like, a motor driving device 2 that drives the motor 1, a battery 3 that includes a plurality of battery cells, a battery monitoring device 4 that monitors a charging state of the battery 3, and a battery 3. A contactor 5 connected between the motor drive device 2 and turned on in response to an instruction from the battery monitoring device 4 when charging power to the battery 3 and discharging power from the battery 3, an ignition key, a start button, etc. EV starting means 6 for starting the EV is provided.

  In FIG. 1, the power line is indicated by the thickest solid line, the communication line is indicated by the second thickest solid line, and the signal line is indicated by the thinnest solid line with an arrow.

  The in-vehicle charge / discharge controller 70 connects the AC charge / discharge device 71 that converts AC power to DC power and the AC connector 7 when an AC connector (not shown) of an external AC power supply system is connected. Power line communication using a power line between the AC connection detection circuit 72 that detects and supplies the detection result to the control power supply monitoring device 85 in the EV control device 80 and the external AC power supply system via the AC connector 7 ( It has an external charging / discharging communication control device 73 for AC charge / discharge that performs PLC (Power Line Communication) and acquires information from an external AC power supply system. The information obtained here includes an ID for identifying the vehicle, a state of charge of the battery 3, and the like, and it is possible to manage the required power amount at the charging station using these. Note that the AC charge / discharge external vehicle communication control device 73 is configured to communicate with the EV charge / discharge monitoring device 81 in the EV control device 80.

  Here, the AC charge / discharge in-vehicle communication control device 73 has been described as having a function of performing PLC with an external AC power supply system, but a configuration having a function of performing communication wirelessly instead of the PLC is also possible. Conceivable.

  AC charging / discharging device 71 is a bidirectional power conversion device that converts AC power of 100 to 200 volts into DC power and converts DC power stored in battery 3 to AC power of 100 to 200 volts. (Inverter), a reactor, a booster circuit for boosting a DC voltage of 100 to 200 volts output from the power converter to a terminal voltage of the battery 3 or higher, and a DC voltage discharged from the battery 3 to 100 to 200 volts It includes a step-down circuit that steps down.

  The EV control device 80 includes an EV charge / discharge monitoring device 81, a DC connection detection circuit 82, a DC charge / discharge external vehicle communication control device 83, an EV drive control device 84, and a control power supply monitoring device 85.

  The EV charging / discharging monitoring device 81 is activated by the control power supply monitoring device 85. In the case of AC charging / discharging, the battery monitoring device 4 includes the information on the charging state of the battery 3 based on the information on the charging state of the battery 3 from the battery monitoring device 4. An ON / OFF instruction for the contactor 5 is given in accordance with the state of charge, and AC charging / discharging by the in-vehicle charging / discharging controller 70 is controlled. In the case of DC charging / discharging, based on the information on the charging state of the battery 3 from the battery monitoring device 4, communication is performed with an external DC power supply system via the DC charging / discharging vehicle exterior communication control device 83, and the DC charging / discharging is performed. Charge / discharge control is performed. The EV charging / discharging monitoring device 81 is configured to communicate with the AC charging / discharging device 71 to give information on the state of charge of the battery 3 from the battery monitoring device 4.

  When a DC connector (not shown) of an external DC power supply system is connected to the DC connector 8, the DC connection detection circuit 82 detects the connection and gives the detection result to the control power supply monitoring device 85. The DC connection detection circuit 82 also detects the voltage of the external DC power supply system connected to the DC connector 8.

  The DC charge / discharge external communication control device 83 has a function of performing communication with an external DC power supply system via a dedicated communication line and communicating with the EV charge / discharge monitoring device 81. The communication line is configured to be connected to a DC connector (not shown) of an external DC power supply system via the DC connector 8.

  The DC connector 8 adopts a configuration in which a power cable for supplying DC power and a dedicated communication line are connected to an external DC power supply controller via a dedicated cable that is combined into one, and the dedicated cable is connected to the DC connector 8. By connecting to the connector 8, the power cable and the signal line are simultaneously connected.

  The EV drive control device 84 receives information on the drive state of the motor 1 from the motor drive device 2 and instructs the motor drive device 2 to perform drive control according to the operation of the EV driver.

  The control power supply monitoring device 85 turns on the power supply of the device related to the EV drive by the input signal from the EV starting means 6, and the connection state of the external AC connector and DC connector from the AC connection detection circuit 72 and the DC connection detection circuit 82. On the basis of this detection result, the control power on and off of necessary equipment in the EV vehicle is controlled. That is, the control of the EV drive control device 84, the on-vehicle charge / discharge controller 70, and the control power supply of the battery monitoring device 4 is controlled during AC charging / discharging, and the control of the EV drive control device 84 and the battery monitoring device 4 is controlled during DC charging / discharging. The power supply is controlled to be turned on and off. When the EV is driven, the control power supply of the EV drive control device 84 and the battery monitoring device 4 is turned on and off.

  As described above, the charge / discharge system 90 includes the on-vehicle charge / discharge controller 70 related to charging / discharging of AC power and the EV control device 80 related to charging / discharging of DC power, and the on-vehicle charge / discharge controller 70. Has an AC charging / discharging device 71 including a bidirectional power conversion device, a reactor, a booster circuit, a step-down circuit, and the like.

  Here, when the specification of the interface with the charging device outside the vehicle is changed, it is necessary to change the AC connection detection circuit 72 and the AC charging / discharging outside-vehicle communication control device 73. Since the charging / discharging device 71 is also included, the AC charging / discharging device 71 is also changed together with the AC connection detection circuit 72 and the AC charging / discharging vehicle exterior communication control device 73. Since the AC charging / discharging device 71 performs charging / discharging of a large amount of power of several kW, the power conversion device, the reactor, and the like are enlarged as the device size, and are also expensive in cost. Furthermore, the layout and shape change accompanying the change of each device has a great influence, and it takes time to change the AC charging / discharging device 71 which is such a large-scale system, resulting in an increase in cost.

  The EV control device 80 includes an EV drive control device 84, which is an ECU for EV drive, and is an important device for controlling the motor drive device 2 and the battery monitoring device 4.

  Here, when the specification of the interface with the charging device outside the vehicle is changed, it is necessary to change the DC connection detection circuit 82 and the DC charge / discharge external communication control device 83, but the EV control device 80 has EV drive control. Since the device 84 is also included, the EV drive control device 84 is changed together with the DC connection detection circuit 82 and the DC charge / discharge vehicle exterior communication control device 83. The EV drive control device 84 is a device that is developed together with the motor drive device 2 and the battery monitoring device 4. To change the EV drive control device 84, it is necessary to change the motor drive device 2 and the battery monitoring device 4. , Changes take time and increases costs. Changes in layout and shape accompanying changes in each device have the same effect.

  Here, as a domestic standard for rapid charging, there is a “CHAdeMO rapid charging / discharging standard”, and its feature is that the CAN (Control Area Network) is used for communication outside the vehicle, and DC charging start and end sequences Has been standardized in detail.

  In addition, there are “IEC61851” and “J1772” as international standards for AC charging, in which standards for AC power supply plugs are defined and are supported in Japan and the United States. “J1772” is characterized in that the amount of current is controlled by a Control PILOT signal.

  In addition, there is “IEC621966-2” as an international standard for AC charging, in which an AC power plug standard corresponding to three-phase 400V is defined, which is being formulated in Europe.

  In addition, there is “ISO15118” as an international standard for AC charging, in which an alternating current PLC communication standard is defined, and charging and current amount can be controlled by PLC communication, which is being formulated in Europe. .

  Thus, the charge / discharge standard in EV differs in countries and regions, and is not unified in the world. On the other hand, EV is a product that will be sold all over the world in the future. For this purpose, the in-vehicle charge / discharge controller 70 and the EV control device 80 must be changed in accordance with the charge / discharge standard in the country or region of sale. In addition, when the charge / discharge standard is changed, it is necessary to change it accordingly.

  However, in the charge / discharge system 90 described above, a large-scale change related to the entire system is required to cope with the change of the charge / discharge standard, which takes time and increases the cost.

  Based on recognition of this problem, the inventors integrated the external connection interface device, the control power supply monitoring device, and the EV charge / discharge monitoring device into one unit, and are configured separately from the AC charge / discharge device and the EV drive control device. I reached the technical idea of

<Embodiment>
<Configuration of charge / discharge system>
Hereinafter, an embodiment according to the present invention based on the above technical idea will be described. FIG. 2 is a block diagram showing the configuration of the charge / discharge system 100 according to the present invention. As shown in FIG. 2, the charge / discharge system 100 includes an EV charge / discharge management device 10 having an external connection interface device 11, a control power supply monitoring device 12, and an EV charge / discharge monitoring device 13, and an EV having an EV drive control device 21. A control device 20 and an in-vehicle charge / discharge controller 30 having an AC charge / discharge device 31 are provided.

  The EV includes a motor 1, a motor driving device 2, a battery 3, a battery monitoring device 4, a contactor 5, and an EV starting means 6, which are the same as those shown in FIG.

  In FIG. 2, the power line is indicated by the thickest solid line, the communication line is indicated by the second thickest solid line, and the signal line is indicated by the thinnest solid line with an arrow.

  The vehicle connection interface device 11 includes an AC connection detection circuit 111, a DC connection detection circuit 112, an AC charge / discharge vehicle communication control device 113, and a DC charge / discharge vehicle communication control device 114.

  When an AC connector (not shown) of an external AC power supply system (external power supply system) is connected to the AC connector 7, the AC connection detection circuit 111 detects the connection and detects the detection result as an EV charge / discharge management apparatus. When the DC connector 8 is connected to the DC connector 8 of the external DC power supply system (not shown), the DC connection detection circuit 112 detects the connection and detects the detection result. Is supplied to the control power supply monitoring device 12. The AC connection detection circuit 111 and the DC connection detection circuit 112 are collectively referred to as connection state detection means.

  For the detection of connection by the AC connection detection circuit 111, for example, a contact switch that is turned on when the AC connector of the external AC power supply system is connected to the AC connector 7 is provided, and the contact switch is turned on. Thus, a configuration in which a signal current flows can be considered.

  In addition, since the connection detection method in the DC connection detection circuit 112 is defined by the DC charging standard, a configuration according to the DC charging standard is adopted.

  The AC connection detection circuit 111 also detects the voltage and frequency of the AC power supply of the external AC power supply system connected to the AC connector 7. The DC connection detection circuit 112 also detects the voltage of an external DC power source connected to the DC connector 8.

  The AC charge / discharge external communication control device 113 (external communication control means) performs external power line communication (PLC: Power Line Communication) using the power line with the external AC power supply system via the AC connector 7 and externally. Get information from the AC power system. The information obtained here includes an ID for identifying the vehicle, a state of charge of the battery 3, and the like, and it is possible to manage the required power amount at the charging station using these. Note that the AC charge / discharge external vehicle communication control device 113 is configured to communicate with the EV charge / discharge monitoring device 13 in the EV charge / discharge management device 10.

  Since the PLC communicates with an external AC power supply system, a dedicated communication line is not required and the configuration can be simplified.

  In addition, the structure which has a function which communicates by radio | wireless instead of the function which performs PLC between the external vehicle power supply control apparatuses 113 and external AC power supply systems is also considered.

  The DC charge / discharge external communication control device 114 (external communication control means) communicates with an external DC power supply system (external power supply system) via a dedicated communication line, and in the EV charge / discharge management device 10. It communicates with the EV charge / discharge monitoring device 13 to control an external DC power supply system. The DC charge / discharge vehicle exterior communication control device 114 is configured to communicate with the EV charge / discharge monitoring device 13 and control an external DC power supply system according to an instruction from the EV charge / discharge monitoring device 13.

  The dedicated communication line is connected to a DC connector (not shown) of an external DC power supply system via the DC connector 8.

  The DC connector 8 employs a configuration in which a power cable for supplying DC power and a dedicated communication line are connected to an external DC power supply controller via a dedicated cable that is combined into one, and the dedicated cable is connected to the DC connector 8. By connecting to the power cable, the power cable and the signal line are simultaneously connected.

The control power supply monitoring device 12 turns on the power supply of the device related to the EV driving by the input signal from the EV starting means 6, and the AC connector and DC of the external AC power supply system from the AC connection detection circuit 111 and the DC connection detection circuit 112. Based on the detection result of the connection state of the connector, the control power on / off of the necessary equipment in the EV vehicle is controlled. That is, EV charging and discharging
The charging / discharging monitoring device 13, the on-vehicle charging / discharging controller 30, and the battery monitoring device 4 are controlled to be turned on and off, and the DC charging / discharging is performed to turn on and off the EV charging / discharging monitoring device 13 and the battery monitoring device 4. When the EV is driven, the turning on and off of the control power of the EV control device 20 and the battery monitoring device 4 are controlled.

  The EV charge / discharge monitoring device 13 is activated by the control power supply monitoring device 12, and in the case of AC charge / discharge, the battery monitoring device 4 is charged with the battery 3 based on the information on the charging state of the battery 3 from the battery monitoring device 4. An ON / OFF instruction for the contactor 5 is given according to the state, and AC charging / discharging by the in-vehicle charging / discharging controller 30 is controlled. In the case of DC charge / discharge, based on the information on the state of charge of the battery 3 from the battery monitoring device 4, communication is performed with an external DC power supply system via the DC charge / discharge external communication control device 114, and the contactor 5 on / off and DC charge / discharge control.

  The EV drive control device 21 constituting the EV control device 20 is activated by the EV starter 6, receives information on the drive state of the motor 1 from the motor drive device 2, and causes the motor drive device 2 to drive the EV driver. The corresponding drive control is instructed.

  The AC charging / discharging device 31 constituting the in-vehicle charging / discharging controller 30 converts AC power of 100 volts to 200 volts into DC power, and converts the DC power stored in the battery 3 into AC power of 100 volts to 200 volts. The battery 3 is discharged from a booster circuit that boosts a DC voltage of 100 volts to 200 volts output from a bidirectional power converter (inverter), reactor, or power converter to a voltage higher than the terminal voltage of the battery 3. A step-down circuit for stepping down the DC voltage to 100 to 200 volts is included.

  Here, an example of arrangement | positioning at the time of incorporating the charging / discharging system 100 demonstrated above in EV is shown in FIG. In FIG. 3, only the power line and the communication line are shown for convenience.

  In the example of FIG. 3, the EV charge / discharge management device 10 is arranged at the rear part of the EV 1000, and the vehicle-mounted charge / discharge controller 30 is arranged at the front part of the EV 1000, but this is an arrangement suitable for the front-wheel drive EV. The on-vehicle charge / discharge controller 30 that is large and can be a noise source is disposed in the machine room where the motor 1 is disposed, and is physically separated from the EV charge / discharge management device 10 that controls communications that are susceptible to noise. It is. In the case of a rear-wheel drive EV, it is desirable to arrange the EV charge / discharge management device 10 at the front and the in-vehicle charge / discharge controller 30 at the rear.

  As described above, in the charge / discharge system 100, the vehicle external connection interface device 11, the control power supply monitoring device 12, and the EV charge / discharge monitoring device 13 are integrated into the EV charge / discharge management device 10, and the EV having the EV drive control device 21. The on-vehicle charge / discharge controller 30 having the control device 20 and the AC charge / discharge device 31 is configured separately from the EV charge / discharge management device 10.

  For this reason, when the specification of the interface with the charging device outside the vehicle is changed, if the unitized EV charge / discharge management device 10 is changed to one that matches the changed specification, the EV drive control device 21 and the AC Without changing the charging / discharging device 31, it is possible to cope with a change in the specifications of the interface with the charging device outside the vehicle.

  That is, if the standard of the control signal given to the EV drive control device 21 and the AC charging / discharging device 31 and the standard of the information on the state of charge of the battery 3 received from the battery monitoring device 4 are standardized, the control power supply monitoring device is adjusted accordingly. 12 and the EV charge / discharge monitoring device 13 are easy to create, and it is easy to create the external connection interface device 11 in accordance with the specifications of the interface with the external charging device. The EV charge / discharge management device It is possible to cope with a change in the specification of the interface with the charging device outside the vehicle simply by changing 10.

  Since it is not necessary to change the EV drive control device 21 or the AC charging / discharging device 31, it is possible to suppress an increase in cost associated with a change in the specification of the interface with the charging device outside the vehicle, and to build a system accompanying the change in a short period of time. It can be realized with quality improvement.

  Further, since the EV control device 20 is composed of the EV drive control device 21 and the on-vehicle charge / discharge controller 30 is composed of the AC charge / discharge device 31, the configuration becomes simple and the total manufacturing cost of the EV can be reduced. .

  In addition, as shown in FIG. 3, the EV charge / discharge management device 10 is arranged at the rear part of the EV 1000, and the EV control device 20 and the vehicle-mounted charge / discharge controller 30 are arranged at the front part of the EV 1000, thereby the EV charge / discharge management device 10. Can be arranged at a position physically separated from the EV control device 20 and the on-vehicle charge / discharge controller 30, so that the AC charge / discharge vehicle communication control device 113 and the DC charge / discharge vehicle exterior in the EV charge / discharge management device 10 can be used. Communication control device 114 becomes less susceptible to switching noise from an inverter or the like, and communication quality is improved.

<Operation of charge / discharge system>
Next, operation | movement of the charging / discharging system 100 in EV mounted with the charging / discharging system 100 is demonstrated using the flowchart shown in FIGS. 4-6, referring FIG.

  First, the operation | movement at the time of AC charging / discharging is demonstrated using the flowchart shown in FIG. In FIG. 4, when an AC charging / discharging operation is started by connecting an external AC connector (not shown) to the AC connector 7, the AC connection detection circuit 111 detects the connection of the external AC connector, and an AC connection detection signal Is supplied to the control power supply monitoring device 12 (step S1).

  The control power supply monitoring device 12 that has received the AC connection detection signal turns on the control power supplies of the EV charge / discharge monitoring device 13, the in-vehicle charge / discharge controller 30, and the battery monitoring device 4 during AC charge / discharge (step S2).

  The EV charge / discharge monitoring device 13 is also activated by the control power supply monitoring device 12 and receives power supply information (for example, voltage and frequency of an external AC power supply) output from the AC charge / discharge device 31 of the in-vehicle charge / discharge controller 30 (step). S3).

  Further, the EV charge / discharge monitoring device 13 receives battery information such as a state of charge (SOC) output from the battery monitoring device 4 (step S4).

  The EV charge / discharge monitoring device 13 receives battery information from the battery monitoring device 4, and gives an instruction to turn on the contactor 5 to the battery monitoring device 4 when the battery 3 needs to be charged (step S5).

  Further, the EV charge / discharge monitoring device 13 instructs the charge / discharge control by the AC charge / discharge device 31 based on the power supply information output from the AC charge / discharge device 31 and the battery information from the battery monitoring device 4 (step S6).

  The EV charge / discharge monitoring device 13 determines whether or not the charging of the battery has been completed based on the battery information output by the battery monitoring device 4 (step S7). If the charging has been completed, the process proceeds to step S8. If the charging has not been completed, the operations from step S6 are repeated.

  In step S8, the EV charging / discharging monitoring device 13 instructs the AC charging / discharging device 31 to end charging, gives an instruction to turn off the contactor 5 to the battery monitoring device 4 (step S9), and ends the AC charging / discharging.

  Next, the operation | movement at the time of DC charging / discharging is demonstrated using the flowchart shown in FIG. In FIG. 5, when a DC charge / discharge operation is started by connecting an external DC connector (not shown) to the DC connector 8, the DC connection detection circuit 112 detects the connection of the external DC connector, and a DC connection detection signal Is supplied to the control power supply monitoring device 12 (step S11).

  Upon receiving the DC connection detection signal, the control power supply monitoring device 12 turns on the control power supplies of the charge / discharge monitoring device 13 and the battery monitoring device 4 during DC charging / discharging (step S12).

  In addition, power supply information (for example, voltage of an external DC power supply) is given from the external DC power supply system to the EV charge / discharge monitoring apparatus 13 via the DC charge / discharge vehicle exterior communication control device 114 (step S13).

  Further, the EV charge / discharge monitoring device 13 receives battery information such as SOC output from the battery monitoring device 4 (step S14).

  The EV charge / discharge monitoring device 13 receives battery information from the battery monitoring device 4, and gives an instruction to turn on the contactor 5 to the battery monitoring device 4 when the battery 3 needs to be charged (step S15).

  Further, the EV charge / discharge monitoring device 13 controls the external DC power supply via the DC charge / discharge vehicle communication control device 114 based on the power supply information received from the external DC power supply controller and the battery information from the battery monitoring device 4. The charger is instructed to perform charge / discharge control (step S16).

  The EV charge / discharge monitoring device 13 determines whether or not the charging of the battery has been completed based on the battery information output by the battery monitoring device 4 (step S17). If the charging has been completed, the process proceeds to step S18. If the charging has not been completed, the operations after step S16 are repeated.

  In step S18, the EV charge / discharge monitoring device 13 instructs the external DC power supply controller to end the charge / discharge via the DC charge / discharge external communication control device 114, and the battery monitoring device 4 is turned off. An instruction is given (step S19), and the DC charge / discharge is terminated.

  Next, the charging / discharging operation during EV travel will be described using the flowchart shown in FIG. As shown in FIG. 6, the EV starts based on the IG on signal output when the EV starting means 6 for starting the EV such as an ignition key or a start button is turned on. The control power supply monitoring device 12 is also given to the monitoring device 12 and is activated (step S21).

  The control power supply monitoring device 12 turns on the control power supply of the EV control device 20 and the battery monitoring device 4 when the EV is driven (step S22).

  The EV drive control device 21 of the EV control device 20 receives battery information such as SOC output from the battery monitoring device 4 (step S23).

  The EV drive control device 21 gives an instruction to turn on the contactor 5 to the battery monitoring device 4 when the discharge from the battery 3 is possible based on the battery information from the battery monitoring device 4 (step S24).

  In addition, the EV drive control device 21 instructs the motor drive device 2 to perform drive control according to the operation of the EV driver (step S25).

  The EV drive control device 21 waits for an IG off signal that is output when the EV starter 6 is turned off (step S26), and repeats the operations from step S25 onward until the IG off signal is output. If it is output, the process proceeds to step S27 to give an instruction to turn off the contactor 5 to the battery monitoring device 4 (step S27), and the driving of the EV is terminated.

  DESCRIPTION OF SYMBOLS 10 Motor, 2 Motor drive device, 3 Battery, 10 EV charging / discharging management apparatus, 11 External connection interface apparatus, 12 Control power supply monitoring apparatus, 13 EV charging / discharging monitoring apparatus, 21 EV drive control apparatus, 31 AC charging / discharging apparatus.

Claims (5)

A charge / discharge system for an electric vehicle that travels by driving a motor using power charged in a battery as a drive source,
Connection state detection means for detecting connection and disconnection between the electric vehicle and the external power supply system, and outputting connection state information indicating whether the connected external power supply system is an AC power supply system or a DC power supply system; An external connection interface device having external communication control means for controlling communication with the external power supply system;
Based on the connection state information output from the external connection interface device, a control power supply monitoring device that controls turning on and off of a control power supply of a device involved in charging and discharging of the battery, and
When activated by the control power supply monitoring device and the electric vehicle is connected to the AC power supply system, charging and discharging of AC power is controlled, and when the electric vehicle is connected to the DC power supply system, A charge / discharge management device having a charge / discharge monitoring device for controlling charge / discharge of DC power in one unit;
The charging / discharging management device, which is provided as a separate unit, drives the motor driving device that drives the motor, and receives and controls the charging / discharging monitoring device to charge AC power to the battery. A charging / discharging system provided with the alternating current charging / discharging apparatus which discharges. The connection state detection means includes
AC that detects that the AC power supply system is connected to an AC connector for charging and discharging AC power provided in the electric vehicle, and outputs that the AC power supply system is connected as the connection state information A connection detection circuit;
DC that detects that the DC power supply system is connected to a DC connector for charging and discharging DC power provided in the electric vehicle, and outputs that the DC power supply system is connected as the connection state information A connection detection circuit,
The outside communication control means includes
An external charging / discharging communication control device for AC charging / discharging that communicates with the AC power supply system;
A DC charge / discharge external communication control device that communicates with the DC power supply system via the DC connector and controls DC charge / discharge by the DC power supply system based on an instruction of the charge / discharge monitoring device; The charging / discharging system of Claim 1 containing.   The charge / discharge system according to claim 1, wherein the charge / discharge management device is disposed at a rear portion of the electric vehicle, and the AC charge / discharge device is disposed at a front portion of the electric vehicle.   The charge / discharge system according to claim 1, wherein the charge / discharge management device is disposed at a front portion of the electric vehicle, and the AC charge / discharge device is disposed at a rear portion of the electric vehicle. The vehicle external communication control device for AC charging / discharging is
The charge / discharge system according to claim 2, wherein communication is performed with the AC power supply system by power line communication using a power line connected to the AC connector.

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