JP2019106845A - Charging/discharging device - Google Patents

Abstract

To provide a charging/discharging device that can improve convenience of a user when switch is made from an automatic mode to a manual mode.SOLUTION: The charging/discharging device includes a control unit 27 that controls a bidirectional power conversion unit 23 to perform charging, discharging, or stop of charging/discharging of a storage battery 61. The control unit 27 has a manual mode of performing charging, discharging, or stop of charging/discharging of the storage battery 61 on the basis of a user's manual operation, and an automatic mode of automatically performing charging, discharging, or stop of charging/discharging of the storage battery 61, and when the manual mode is set during an automatic operation by the automatic mode, prohibits the automatic operation by the automatic mode, and gives priority to a manual operation by the manual mode. In a case where charging/discharging of the storage battery 61 is stopped on the basis of the manual operation by the manual mode, the control unit 27 makes switch to an automatic operation by the automatic mode stored in a memory 25 that stores the automatic mode before switching to the manual mode.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a charge and discharge device.

  A charge / discharge stand as a V2H (Vehicle to Home) device is connected between a vehicle equipped with a storage battery and a house with a load, and charge / discharge control is automatically performed according to a set operation mode. (E.g., Patent Document 1).

WO 2015/159421

  By the way, when performing charge / discharge control automatically according to the set operation mode, there is a possibility that automatic charge / discharge control operates preferentially even when the user intentionally performs charge / discharge manually. It was necessary to improve the convenience of the user when switching from automatic to manual.

  An object of the present invention is to provide a charge / discharge device capable of improving the convenience of the user when switching from automatic to manual.

  In the invention according to claim 1, a charge / discharge device connected between a vehicle equipped with a storage battery and a house having a load and capable of charging and discharging the storage battery, the power conversion unit performing power conversion, and And a control unit that controls the power conversion unit to stop charging, discharging, or charging or discharging the storage battery, and the control unit is configured to stop charging, discharging, or charging or discharging of the storage battery based on a user's manual operation. A manual mode to be performed and an automatic mode to automatically stop charging, discharging or charging / discharging the storage battery, and when the manual mode is set during the automatic operation by the automatic mode, the automatic operation by the automatic mode While giving priority to manual operation in the manual mode, and when charging / discharging of the storage battery is stopped based on the manual operation in the manual mode, the automatic mode before switching to the manual mode is And summarized in that switching to automatic operation by the automatic mode stored in the storage unit to 憶.

  According to the invention described in claim 1, when the manual mode is set during the automatic operation in the automatic mode, the control unit prohibits the automatic operation in the automatic mode and gives priority to the manual operation in the manual mode, the manual mode When the charge and discharge of the storage battery are stopped based on the manual operation by the above, it switches to the automatic operation by the automatic mode stored in the storage unit. Therefore, after the manual stop at the time of switching from the automatic to the manual, the automatic mode is automatically switched without selecting the automatic mode, and the convenience of the user is improved.

  As described in claim 2, in the charge / discharge device according to claim 1, when the charge / discharge of the storage battery is stopped based on a manual operation, the control unit maintains a stop state for a set time. It is good to switch to the automatic operation by the above-mentioned automatic mode after having set time.

  As described in claim 3, in the charge / discharge device according to claim 2, when the automatic mode is set by the user during the pause mode, the control unit sets the user set from the pause mode. Switch to automatic mode.

  According to the present invention, the convenience of the user when switching from automatic to manual can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram of the electric power system in embodiment. The flowchart for demonstrating an effect | action. The time chart for explaining charge, discharge, and stop. The time chart for explaining charge, discharge, and stop.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the power system 10 includes, as a power supply source, a solar power generation system 30, a commercial power grid 40, and a storage battery 61 mounted on a vehicle 60. Then, the power generated by the solar power generation system 30, the grid power of the commercial power grid 40, and the power from the discharge of the storage battery 61 through the charging / discharging stand 21 can be supplied to the load 51 of the house 50. There is.

  The photovoltaic system 30 includes a solar panel 31 and a power conditioner 32. The solar panel 31 receives sunlight, generates power, and outputs DC power. The power conditioner 32 converts the power generated by the solar panel 31 into alternating current and outputs it.

  The house 50 has a load 51 and a distribution board 55. A load 51 is connected to the distribution board 55. A commercial power system 40 is connected to the distribution board 55. For example, AC power of 100 V or 200 V can be supplied to the load 51 from the commercial power system 40 to the house 50. The power conditioner 32 of the photovoltaic power generation system 30 is connected to the distribution board 55. AC power can be supplied to the load 51 from the solar power generation system 30 to the house 50.

The power system 10 includes a charge / discharge device 20. The charge and discharge device 20 includes a charge and discharge stand 21 which is a main body, and a control terminal 22.
The charge and discharge device 20 (charge and discharge stand 21) is connected between the vehicle 60 and the house 50. That is, the charge and discharge device 20 (charge and discharge stand 21) is a V2H (Vehicle to Home) device that connects a vehicle and a house. The charge and discharge device 20 can charge and discharge the storage battery 61 mounted on the vehicle 60. Vehicle 60 is an electric vehicle (EV) or the like, and during traveling, storage battery 61 is discharged.

  In the vehicle 60, a storage battery 61, a load 62 such as a traveling motor, and a control unit 63 are mounted. The storage battery 61, which is a DC power supply, is a high voltage, for example, 300 V secondary battery. Specifically, for example, a lithium ion secondary battery is used. The control unit 63 can drive the load 62 such as a traveling motor with the power of the storage battery 61.

  The charge and discharge stand 21 includes a bidirectional power conversion unit 23 as a power conversion unit that performs power conversion, a control unit 24, a memory 25, and an operation unit 26. Bidirectional power conversion unit 23 has DC / DC converter (DC / DC converter) 23a and DC / AC converter (inverter) 23b, and DC / DC converter 23a and DC / AC converter 23b are in series. It is connected to the.

  The DC / DC converter (DC / DC converter) 23a and the DC / AC converter (inverter) 23b are each configured using a semiconductor switching element such as a MOSFET, an IGBT, a bipolar transistor, etc. The output is adjusted by control (duty control). In the DC / DC converter (DC / DC converter) 23a, for example, the voltage (150 to 450 V) of the storage battery 61 is converted to a constant voltage.

  The bidirectional power conversion unit 23 is connected to the house 50. That is, the DC / AC converter 23 b is connected to the distribution board 55 of the house 50. AC power can be supplied to the load 51 from the bidirectional power conversion unit 23 of the charge and discharge stand 21 with respect to the house 50. That is, the bidirectional power conversion unit 23 as the power conversion unit can convert the discharged power from the storage battery 61 and output the power to the load 51.

  The charge and discharge stand 21 and the vehicle 60 are connected using a connector with a cable as an interface. Specifically, the connector with cable extending from the charge and discharge stand 21 is inserted into the inlet provided in the vehicle 60. Thus, the DC / DC converter 23a of the charge / discharge stand 21 and the storage battery 61 of the vehicle 60 are connected, and the control unit 24 of the charge / discharge stand 21 and the control unit 63 of the vehicle 60 are communicably connected. .

  Specifically, for example, in a vehicle compatible with the CHAdeMO system, the control unit 63 constantly monitors the charge rate (SOC) of the storage battery 61, and the storage battery 61 is mounted on the charge / discharge stand 21 via the communication line provided in the cable connector. It is possible to notify the charging rate (SOC).

  In the charging / discharging stand 21, the control unit 24 can control the bidirectional power conversion unit 23 to stop charging, discharging or charging / discharging of the storage battery 61. Specifically, the control unit 24 controls the bidirectional power conversion unit 23 to supply the power of the storage battery 61 of the vehicle 60 to the load 51 of the house 50 via the bidirectional power conversion unit 23 and The discharge 51 can drive the load 51 of the house 50.

  Further, control unit 24 controls bidirectional power conversion unit 23 to charge storage battery 61 of vehicle 60 via bidirectional power conversion unit 23 with power from at least one of solar power generation system 30 and commercial power grid 40. It can be done. That is, the bidirectional power conversion unit 23 is controlled by the control unit 24, and the input power from at least one of the solar panel 31 and the commercial power system 40 is converted by the bidirectional power conversion unit 23 as the power conversion unit and the storage battery It can be output to 61.

  The control unit 24 is connected to the operation unit 26. The operation unit 26 has a manual operation switch 26a. It is possible to instruct the control unit 24 to charge, discharge, or stop by the operation of the manual operation switch 26 a by the user. The control unit 24 is connected to the memory 25. The memory 25 stores states of automatic charging, automatic discharging, manual charging and manual discharging.

  The control terminal 22 is an in-home controller, and is disposed in the house 50. The control terminal 22 has a control unit 27 and an operation unit 28. The control unit 27 of the control terminal 22 can mutually communicate with the control unit 24. The control unit 27 is connected to the operation unit 28. The operation unit 28 has a manual operation switch 28a and an automatic mode operation unit 28b. The control unit 27 can be instructed to charge, discharge, or stop by the operation of the manual operation switch 28 a by the user. In addition, the automatic charge / discharge mode can be instructed to the control unit 27 by the operation of the automatic mode operation unit 28b by the user. As a mode of automatic charge and discharge, for example, there is a timer mode, a vehicle priority mode, and the like. The timer mode is a mode in which charging and discharging are automatically performed at a certain time, and the start time and the end time can be reserved. The vehicle priority mode is a mode that automatically performs full charge unconditionally immediately after connecting to the vehicle.

  The control unit 24 of the charge and discharge stand 21 and the control unit 27 of the control terminal 22 are connected by a communication line, and charge and discharge instructions and information exchange are performed between the control unit 24 and the control unit 27. Therefore, the control unit 24 and the control unit 27 share information, and the control unit 27 controls the bidirectional power conversion unit 23 via the control unit 24 to stop charging, discharging or charging / discharging of the storage battery 61. It can be done. As a communication method between the control unit 24 and the control unit 27, for example, the ECHONET-Lite standard can be used.

  The control unit 24 and the control unit 27 are a manual mode for stopping charging, discharging or charging / discharging of the storage battery 61 based on a manual operation of the user, and an automatic mode for automatically stopping charging / discharging or charging / discharging of the storage battery 61. Have.

Next, the operation will be described.
The control unit 27 of the control terminal 22 executes processing when an event of automatic charging start shown in FIG. 2 occurs.

FIG. 3 is a time chart for explaining charge, discharge, and stop.
In FIG. 3, a timer mode is set to perform automatic charge and discharge, a start time t1 for reservation is set, and an end time t6 for reservation is set.

  As shown in FIG. 3, the automatic mode is automatically stopped at the timing t2 during the automatic operation in the automatic mode, and the manual charge / discharge manual mode is set at the timing t3. Thereafter, the charging and discharging of the storage battery 61 were stopped based on the manual operation in the manual mode by being manually stopped at the timing of t4. After that, it is switched to the automatic mode.

  The time chart for describing charging, discharging, and stopping in FIG. 4 shows a case where the automatic mode is set by the user at the timing of t10 in the pause mode (see FIG. 3).

  In FIG. 2, the control unit 27 determines in step S100 whether or not the condition for starting automatic charging is satisfied. For example, in the case where the timer mode (charge / discharge reservation mode) is set, it is determined whether or not it is a reservation time.

  When the condition for starting automatic charging is satisfied, the control unit 27 acquires the state from the charge and discharge stand 21 in step S101, and then determines whether the state of the charge and discharge stand 21 is stopped in step S102. In steps S103, S104, S105, and S106, control unit 27 determines that the state of charging / discharging stand 21 is not manual charging, not manual discharging, not automatic charging, or automatic discharging in steps S103, S104, S105, S106. If so, the process proceeds to step S107. The control unit 27 instructs the charge and discharge stand 21 to stop the discharge in step S107. On the other hand, in steps S103, S104, S105, and S106, control unit 27 determines whether the state of charge / discharge stand 21 is manual charge, manual discharge, automatic charge, or not automatic discharge in step S100. Return to

  When the state of the charge / discharge stand 21 is stopped at step S102, or after the process of step S107, the control unit 27 shifts to step S108. In step S108, the control unit 27 instructs the charge and discharge stand 21 to start charging, and notifies the charge and discharge stand 21 of automatic operation in step S109. As a result, the memory 25 of the charge and discharge stand 21 is stored as being in automatic operation.

  After performing the process of step S109, the control unit 27 acquires the state from the charge and discharge stand 21 in step S110, and then determines whether the state of the charge and discharge stand 21 is automatic charging or not in step S111. If the state of the charge and discharge stand 21 is not automatic charging, the control unit 27 sets the pause mode in step S112 and pauses for a predetermined time. The predetermined time is, for example, about one hour.

  If the state of charge / discharge stand 21 is the automatic charge in step S111, control unit 27 determines whether or not the condition for stopping the automatic charge is satisfied in step S113, and if not satisfied, the process returns to step S110, and if satisfied, the process proceeds to step S114. Then, the charge / discharge station 21 is instructed to stop charging.

This will be described with reference to FIGS.
In FIG. 3, the timer mode is set to perform automatic charging and discharging, the start time t1 for reservation is set, and the end time t6 for reservation is set, and the control unit 27 executes steps S100, S101, S102, and S102 in FIG. The processes of S108, S109, S110, S111, S113, and S114 are performed to perform automatic charging and discharging. In FIG. 3, the control unit 27 is manually stopped at timing t2 during automatic operation in the automatic mode, and when the manual mode by manual charge and discharge is set at timing t3, the processing in steps S103 and S104 in FIG. It becomes YES and prohibits the automatic operation by the automatic mode and gives priority to the manual operation by the manual mode. The automatic mode before switching to the manual mode is stored in the memory 25 as the storage unit by the process of step S109 in FIG. 2, and the control unit 27 manually stops the manual mode in the manual mode by being manually stopped at the timing of t4. When charging / discharging of the storage battery 61 is stopped based on operation, it becomes NO by the process of step S111 of FIG. 2, switches to the automatic operation by the automatic mode stored in the memory 25 by the process of steps S100-S111 and S113.

  Further, at time t4 in FIG. 3, the control unit 27 executes the process of step S112 in FIG. That is, as shown in FIG. 3, when charge / discharge of storage battery 61 is stopped based on the manual operation, control unit 27 has a pause mode for maintaining the stop state for set time T1, and set time T1 has elapsed. Switch to automatic operation by the automatic mode at the timing of t5 later.

  However, as shown in FIG. 4, when the end time by reservation passes at the timing of t9 and the automatic mode (the timer mode in FIG. 4) is set by the user at the timing of t10 during the pause mode (in FIG. When the start time comes, the control unit 27 switches from the sleep mode to the automatic mode set by the user.

  In this way, for example, when the reservation start time comes and charging is performed, the current state is inquired to the charge / discharge stand 21 side in step S102 of FIG. 2 to detect whether or not it is operating manually, manually If it is working with, do not instruct anything. In other words, the memory 25 of the charge / discharge stand 21 holds information on whether it is manual operation or automatic operation, and if it is not operated manually, the start of charging is instructed in step S108 of FIG. If there is, suppress automatic driving. Normally, charging and discharging are automatically performed according to the mode set in the control terminal 22 in the home, but the user manually performs charging and discharging with the operation units (switches) 26 and 28 provided in the charge and discharge stand 21 and the control terminal 22 When there is a problem, priority is given to manual charging and discharging, and automatic charging and discharging is suppressed. In the normal state, the timer is set or the charging / discharging is performed automatically while seeing the power state in the home, but when the user performs the charging / discharging manually manually, the operation can be continued without interrupting the operation. .

  Further, by storing the current state of charge and discharge in the memory 25 of the charge and discharge stand 21, when the control terminal 22 is restarted with the power on, or the communication between the control terminal 22 and the charge and discharge stand 21 is interrupted. It is possible to obtain the status without any problem even when there is a time (reconnection). More specifically, for example, during automatic charging, communication with the control unit 24 of the charge / discharge stand 21 is interrupted in the control unit 27 of the control terminal 22, and when the charge / discharge stand 21 side is manually charged, communication When it is tried to automatically stop when restart is performed, the recognition does not coincide between the charge and discharge stand 21 and the control terminal 22 side, so the control terminal 22 side makes an inquiry to the charge and discharge stand 21 side immediately before.

According to the above embodiment, the following effects can be obtained.
(1) The charge / discharge device 20 includes a control unit 27 that controls the bidirectional power conversion unit 23 as a power conversion unit to stop charging, discharging, or charging / discharging of the storage battery 61. The control unit 27 There is a manual mode for stopping charging, discharging or charging / discharging of the storage battery 61 based on the manual operation of the user, and an automatic mode for automatically stopping charging, discharging or charging / discharging of the storage battery 61. When the manual mode is set during the automatic operation in the automatic mode, the control unit 27 prohibits the automatic operation in the automatic mode and gives priority to the manual operation in the manual mode. When charging / discharging of storage battery 61 is stopped based on the manual operation in the manual mode, control unit 27 performs the automatic operation in the automatic mode stored in memory 25 as a storage unit that stores the automatic mode before switching to the manual mode. Switch to Therefore, after the manual stop at the time of switching from the automatic to the manual, the automatic mode is automatically switched without selecting the automatic mode, and the convenience of the user is improved.

  For example, in the related art, when charge / discharge control is automatically performed according to the set operation mode, automatic charge / discharge control may preferentially operate even when the user intentionally carries out charge / discharge manually. For example, although the manual charging is stopped by the user's intention, switching to the automatic mode immediately after the stopping and charging being started violates the user's intention. In the present embodiment, the convenience of the user when switching from automatic to manual can be improved.

  (2) When charging / discharging of the storage battery 61 is stopped based on a manual operation, the control unit 27 has a pause mode for maintaining the paused state for a set time, and switches to automatic operation by the automatic mode after the set time has elapsed. For example, even if manual charging is stopped by the user's intention, switching to the automatic mode immediately after the stopping and charging being started violates the user's intention. Therefore, it is better to maintain the stop state for the set time T1 than switching to the automatic mode immediately after the stop.

  However, when the automatic mode is set by the user during the sleep mode, the control unit 27 switches from the sleep mode to the automatic mode set by the user. Therefore, immediately after the manual stop, when the automatic mode is selected, it is possible to switch to the automatic mode without waiting for the set time (T1) and start the automatic operation.

The embodiment is not limited to the above, and may be embodied as follows, for example.
○ Although the storage battery 61 can be charged by the grid power of the commercial power grid 40 and the power generated by the power generation facility (the solar power generation system 30), the power generation facility (the solar power generation system 30) may not be required. The storage battery 61 may be charged by grid power of the power grid 40.

  In the control terminal, the automatic charge / discharge operation mode can be set. However, the control terminal may be omitted, and the charge / discharge stand may be set to the automatic charge / discharge operation mode. Moreover, the control part 24 of the charging / discharging stand 21 may perform the process of FIG. That is, when the manual mode is set during the automatic operation in the automatic mode, the control unit 24 prohibits the automatic operation in the automatic mode and gives priority to the manual operation in the manual mode. When charge / discharge of storage battery 61 is stopped based on the manual operation in the manual mode, control unit 24 performs the automatic operation in the automatic mode stored in memory 25 as a storage unit that stores the automatic mode before switching to the manual mode. Switch to Further, when charging / discharging of the storage battery 61 is stopped based on the manual operation, the control unit 24 has a pause mode for maintaining the paused state for a set time, and switches to automatic operation by the automatic mode after the set time has elapsed. Furthermore, when the automatic mode is set by the user during the sleep mode, the control unit 24 switches from the sleep mode to the automatic mode set by the user.

  DESCRIPTION OF SYMBOLS 20 ... Charge-and-discharge apparatus, 23 ... Two-way power conversion unit (power conversion part), 27 ... Control part, 25 ... Memory (storage part), 50 ... Housing, 51 ... Load, 60 ... Vehicle, 61 ... Storage battery, T1 ... set time.

Claims (3)

A charge / discharge device connected between a vehicle equipped with a storage battery and a house having a load and capable of charging and discharging the storage battery,
A power converter that converts power;
A control unit that controls the power conversion unit to stop charging, discharging, or charging / discharging of the storage battery;
Equipped with
The control unit
A manual mode for stopping charging, discharging or charging / discharging of the storage battery based on a user's manual operation;
And an automatic mode for automatically stopping charging, discharging or charging / discharging of the storage battery,
If the manual mode is set during the automatic operation in the automatic mode, the automatic operation in the automatic mode is prohibited and priority is given to the manual operation in the manual mode,
When charging / discharging of the storage battery is stopped based on the manual operation in the manual mode, switching to automatic operation by the automatic mode stored in the storage unit storing the automatic mode before switching to the manual mode is characterized Charge and discharge device.   The control unit has a pause mode for maintaining the stop state for a set time when the charge and discharge of the storage battery is stopped based on a manual operation, and switches to automatic operation by the automatic mode after the set time has elapsed. The charge / discharge device according to claim 1.   The charge / discharge device according to claim 2, wherein the control unit switches from the sleep mode to the automatic mode set by the user when the automatic mode is set by the user during the sleep mode.