JP2018129154A - Charger/discharger and charging/discharging system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charger/discharger capable of circumventing inactivity of a lock mechanism due to increase in friction of a sliding part.SOLUTION: A charger/discharger includes a charge/discharge cable 11, and a charge/discharge connector 12 provided in the charge/discharge cable 11 and connected with a vehicle. The charge/discharge connector 12 includes a connector case 102, a lock mechanism provided in the connector case 102, and preventing removal of the charge/discharge connector 12 connected with the vehicle, and a solenoid 92 provided in the connector case 102, and holding the lock mechanism in lock state. A water inlet 111 supplying water, for cleaning the sliding part 120 of a solenoid 92, into the connector case 102 is formed in the connector case 102.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a charger / discharger and a charge / discharge system for charging a storage battery mounted on an electric vehicle or discharging electric power charged in the storage battery.

  In recent years, a charging / discharging system that supplies electric power from a storage battery mounted on an electric vehicle (EV) to home appliances that are in-house loads and charges the storage battery mounted on the EV using electric power supplied from a commercial system. Is spreading. In a conventional charge / discharge system, when a storage battery mounted on an EV is charged with electric power supplied from a commercial system, an AC power conditioner (EV-PCS) provided as an electric power conditioner for an AC is used as an alternating current. The electric power is converted into DC power, and this DC power is supplied to the EV. When supplying the electric power stored in the storage battery mounted on the EV to the residential load, the charge / discharge system converts the DC power output from the storage battery mounted on the EV into AC power by the EV-PCS. Electric power is supplied to the residential load.

  On the other hand, the charge / discharge connector that connects the storage battery mounted on the EV and the power conversion device for charge / discharge requires a lock mechanism that prevents the user from pulling out the charge / discharge connector that is being charged / discharged. is there. The electrical connector disclosed in Patent Document 1 includes an electromagnetic lock mechanism for prohibiting the release of the connection between the inlet of the electric device and the electrical connector during power transmission. The electromagnetic lock mechanism includes a latch member for fixing the electrical connector to the inlet, and a solenoid actuator coupled to the latch member.

JP2015-230750A

  In the solenoid actuator used for the charge / discharge connector, the gap formed in the sliding part of the solenoid actuator is narrow. Therefore, in the charge / discharge connector installed in the salt damage area, sea salt particles adhere to the sliding part of the solenoid actuator. By solidifying, the friction of the sliding portion increases, and the solenoid actuator provided in the charge / discharge connector may become inoperative. In the electrical connector disclosed in Patent Document 1 including such a solenoid actuator, the disconnection of the wiring for driving the solenoid actuator can be detected, but the lock mechanism does not operate due to an increase in friction of the sliding portion. There was a problem that it was difficult to respond to.

  This invention is made | formed in view of the above, Comprising: It aims at obtaining the charger / discharger which can avoid the malfunction of the locking mechanism resulting from the increase in the friction of a sliding part.

  In order to solve the above-described problems and achieve the object, a charger / discharger of the present invention includes a charging / discharging unit that controls at least one of charging to a storage battery mounted on a vehicle and discharging of the storage battery. It is an electric appliance, Comprising: The cable which electrically connects a charging / discharging part and a storage battery, and the connector provided in a cable and connected to a vehicle are provided. The connector includes a connector case, a lock mechanism that is provided inside the connector case and prevents the connector connected to the vehicle from being removed, and a solenoid that is provided inside the connector case and holds the lock mechanism in a locked state. The connector case is formed with a water supply port for supplying water for cleaning the sliding portion of the solenoid into the connector case.

  According to the present invention, there is an effect that it is possible to avoid malfunction of the lock mechanism due to an increase in friction of the sliding portion.

The figure which shows the structure of the charging / discharging system containing the charger / discharger which concerns on embodiment The figure which shows the structure of the high-order system of the charging / discharging system shown in FIG. The figure which shows the external appearance of the charger / discharger which concerns on embodiment The figure which shows the main circuit of the charging / discharging system which concerns on embodiment The figure which shows the circuit of the interface part between the power converter shown by FIG. 4, and EV. The figure which shows the cross section of the charging / discharging connector and charging / discharging cable used for the charging / discharging system which concerns on embodiment The figure which shows the structural example of the home control apparatus shown in FIG. The flowchart which shows the process in which the driving | running state measurement part shown in FIG. 7 calculates the working time of EV-PCS based on operation condition information. The flowchart which shows the process which the driving | running state measurement part shown in FIG. 7 calculates the energization frequency of a solenoid based on operation condition information. The figure which shows the structural example of the hardware which implement | achieves the home control apparatus shown in FIG.

  Hereinafter, a charger / discharger and a charge / discharge system according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment.
FIG. 1 is a diagram showing a configuration of a charge / discharge system including a charger / discharger according to an embodiment. The charging / discharging system 100 includes a solar battery 1, a switching switch 2, a solar battery power conditioning system (PV-PCS3), an EV-PCS4, a residential distribution board 6, and a switching switch. Device 7, main earth leakage circuit breaker 8, and maintenance circuit breaker 10. The PV-PCS 3 supplies the electric power generated by the solar cell 1 to the commercial system 9, the EV 5 that is a vehicle, or the home load 70. The EV-PCS 4 is a charger / discharger that supplies power to the storage battery mounted on the EV 5 or supplies the power stored in the storage battery to the home load 70.

  The switching switch 2 is connected to the PV-PCS 3 via the wiring a. The switching switch 2 is connected to the distribution board 6 for house and the switching switch 7 via the wiring b. In addition, the EV-PCS 4 is connected to the switching switch 2 via a wiring c. The switching switch 2 includes a common terminal 21 to which the wiring a is connected, a terminal 22 to which the wiring b is connected, a terminal 23 to which one end of the wiring c is connected, and a contact 24.

  The residential distribution board 6 includes a main breaker 6a and a plurality of branch breakers 6b connected to the main breaker 6a. A home load 70 is connected to each of the plurality of branch breakers 6b. In FIG. 1, one in-home load 70 is shown, and the in-home load 70 is a device driven by AC power, and the home load 70 can be exemplified by a refrigerator, lighting, a cooking device, a telephone, a television, or audio.

  The switching switch 7 is switching switching means for connecting the main earth leakage circuit breaker 8 and the residential distribution board 6 or connecting the EV-PCS 4 and the residential distribution board 6. The switching switch 7 includes a common terminal 71 to which the two wires b and d are connected, a terminal 72 to which the wire e is connected, a terminal 73 to which one end of the wire f is connected, a common terminal 71 and a terminal 72. Or a contact 74 for electrically connecting the common terminal 71 and the terminal 73. The terminal 72 is connected to the secondary side of the main leakage breaker 8 via the wiring e.

  A commercial system 9 is connected to the primary side of the main earth leakage breaker 8. Two wires e and g are connected to the secondary side of the main earth leakage breaker 8. The secondary side of the main earth leakage circuit breaker 8 is connected to the primary side of the maintenance circuit breaker 10 via the wiring g. Further, the secondary side of the main leakage breaker 8 is connected to the terminal 72 of the switching switch 7 via the wiring e.

  The maintenance circuit breaker 10 is an opening / closing means for connecting or separating between the main earth leakage circuit breaker 8 and the EV-PCS 4. During maintenance and inspection of the EV-PCS 4, the maintenance circuit breaker 10 opens a wiring path between the main leakage breaker 8 and the EV-PCS 4. The secondary side of the maintenance circuit breaker 10 is connected to the EV-PCS 4 via the wiring h.

  The EV-PCS 4 includes an overcurrent circuit breaker 40, a disconnection switch 41, a current transformer 42, and a power converter 43. The disconnecting switch 41 is an opening / closing means for disconnecting the connection between the commercial system 9 and the EV-PCS 4 when the user selects the shift to the self-sustaining operation at the time of a power failure of the commercial system 9. The power converter 43 is a charging / discharging unit that controls charging / discharging of a storage battery mounted on the EV 5.

  A wiring h is connected to the overcurrent breaker 40. The current transformer 42 is provided to prevent the power supplied from the EV 5 from flowing backward to the commercial system 9. That is, since the electric power stored in the storage battery mounted on the EV 5 cannot be sold to the commercial system 9, the current transformer is used to prevent the AC power output from the power converter 43 from flowing into the commercial system 9. 42 is provided. The other end of the wiring c is connected to the disconnecting switch 41 and the current transformer 42.

  The power converter 43 is bidirectional power conversion means. The power converter 43 has a function of converting AC power supplied from the commercial system 9 or the PV-PCS 3 into DC power and outputting it, and a function of converting DC power supplied from the EV 5 into AC power and outputting it. Have. The other end of the wiring f is connected between the AC side of the power converter 43 and the disconnecting switch 41. The EV 5 is connected to the DC side of the power converter 43 via a charge / discharge cable 11 which is a charge / discharge cable.

  The charge / discharge cable 11 is a cable that transmits charge / discharge power, a communication signal, and a control power source between the EV-PCS 4 and the EV 5. A charge / discharge connector 12, which is a charge / discharge connector connected to the inlet of the EV 5, is provided at the tip of the charge / discharge cable 11.

  Next, the operation of the charge / discharge system 100 will be described. The operation mode of the charge / discharge system 100 is roughly divided into a charge mode and a discharge mode.

  In the charging mode, the electric power supplied from the commercial system 9 and the electric power supplied from the solar cell 1 can be supplied to the EV 5. Further, in the charging mode, when the commercial system 9 fails, the disconnection switch 41 is opened, so that the EV-PCS 4 is disconnected from the commercial system 9 and supplied via the switching switch 2. The storage battery mounted on the EV 5 is charged with the electric power.

  In the discharge mode, normally, the discharge amount of the storage battery mounted on the EV 5 is adjusted according to the power generation amount of the solar cell 1 and the power consumption amount of the home load 70, and the insufficient power is supplied from the commercial grid 9. Is covered by

  The EV-PCS 4 can perform seamless charge / discharge that switches between the charge mode and the discharge mode without interruption, and according to the power generation amount of the solar cell 1 and the power consumption amount of the home load 70 at the time of a power failure of the commercial system 9, The discharge amount of the storage battery mounted on EV5 is adjusted. As described above, when disconnected from the commercial system 9, an operation mode in which the charging / discharging is performed seamlessly and the operation of the home load 70 is continued by the power supplied from the solar cell 1 and the power supplied from the EV 5 is performed independently. This is called a mode.

Hereinafter, a specific example of the charging mode will be described. When the commercial system 9 is not out of power and the EV-PCS 4 is operating normally, the switching switch 2, switching switch 7, main leakage breaker 8, maintenance circuit breaker 10, overcurrent circuit breaker The states of 40 and disconnection switch 41 are as follows.
(1) The terminal 23 of the switching switch 2 is connected to the common terminal 21.
(2) The terminal 73 of the switching switch 7 is connected to the common terminal 71.
(3) The main earth leakage circuit breaker 8 is closed.
(4) The maintenance circuit breaker 10 is closed.
(5) The disconnect switch 41 is closed.
(6) The overcurrent circuit breaker 40 is closed.

  In such a state, the AC power supplied from the commercial system 9 is supplied from the main earth leakage breaker 8, the maintenance circuit breaker 10, the overcurrent circuit breaker 40, the disconnection switch 41, the switching switch 7, and the main breaker 6a. And it is supplied to the in-home load 70 via the branch breaker 6b. At this time, the electric power of the commercial system 9 is supplied to the AC output side of the PV-PCS 3 via the switching switch 2, and the PV-PCS 3 that has detected the electric power of the commercial system 9 performs the commercial system interconnection operation.

  On the other hand, the AC power supplied from the commercial system 9 is also supplied to the power converter 43 via the overcurrent circuit breaker 40 and the disconnecting switch 41. The power converter 43 converts AC power supplied from the commercial system 9 into DC power. The converted DC power is supplied to the storage battery mounted on the EV 5 via the charge / discharge cable 11. Thereby, the storage battery mounted in EV5 is charged.

Hereinafter, a specific example of the independent operation mode will be described. When the commercial system 9 fails and the EV-PCS 4 is operating normally, the switching switch 2, the switching switch 7, the main circuit breaker 8, the maintenance circuit breaker 10, the overcurrent circuit breaker 40, and the solution The state of the line switch 41 is as follows.
(1) The terminal 23 of the switching switch 2 is connected to the common terminal 21.
(2) The terminal 73 of the switching switch 7 is connected to the common terminal 71.
(3) The main earth leakage circuit breaker 8 is closed.
(4) The maintenance circuit breaker 10 is closed.
(5) The disconnection switch 41 is opened.
(6) The overcurrent circuit breaker 40 is closed.

  When the EV-PCS 4 detects that the commercial system 9 has failed, the EV-PCS 4 outputs a command to open the disconnecting switch 41. Thereby, the connection between the EV-PCS 4 and the commercial system 9 is released. Thereafter, the power converter 43 that detects the power failure by monitoring the voltage of the commercial system 9 converts the DC power supplied from the storage battery mounted on the EV 5 into AC power. The converted AC power is supplied to the in-home load 70 via the switching switch 7, the main breaker 6a, and the branch breaker 6b.

  The AC power output from the power converter 43 during the self-sustaining operation is also supplied to the AC output side of the PV-PCS 3 via the switching switch 2. The PV-PCS 3 that has detected the AC power outputs AC power linked to the AC power output from the power converter 43 when the voltage on the commercial system 9 side is restored. Thereby, the electric power generated by the solar cell 1 can be supplied to the home load 70.

  The power consumption of a general house is normally 3 [kW] to 12 [kW] for a single phase of 200 [V]. The amount of power generated by the solar cell 1 varies depending on the area of the roof of the house and the amount of solar radiation, and is generally 2 [kW] to 12 [kW]. Due to the improvement of power conversion efficiency in solar cell 1 and the improvement of the roof structure of houses, the amount of power generated by solar cell 1 tends to increase in recent years. On the other hand, the power capacity of the storage battery mounted on the EV 5 is 1 [kWh] to 30 [kWh], and tends to increase dramatically due to the improvement in battery performance.

  FIG. 2 is a diagram showing a configuration of a host system of the charge / discharge system shown in FIG. The host system 200 shown in FIG. 2 includes a home controller 30 that is operated by the user, and a home control device 31 that is a control display that controls the EV-PCS 4 and displays the operation state of the EV-PCS 4. The home control apparatus 31 includes a display 310 that displays various types of information. The home control device 31 is configured to control the EV-PCS 4 and the home load 70 according to the power consumption state of the home load 70 connected to the residential distribution board 6 shown in FIG. 1 and the power generation state of the PV-PCS 3. It is a home energy management system (Home Energy Management System) which controls a driving | running state.

  According to the host system 200, when the EV-PCS 4 performs a self-sustained operation, generation of unnecessary power consumption in the home load 70 can be suppressed, and the commercial system 9 can be used for a long time by effectively using the battery remaining amount of the EV 5. Even if a power failure occurs, the supply of power to the home load 70 can be continued. Thereby, the user can continue the life using electricity also at the time of a power failure. Further, the user can charge the rechargeable battery mounted on the EV 5 using the home controller 30 and can check the charging status of the rechargeable battery mounted on the EV 5. Therefore, the user can manage the state of the rechargeable battery mounted on the EV 5 at home without checking an operation screen (not shown) provided on the EV-PCS 4 installed outside the home.

  FIG. 3 is a diagram showing an appearance of the charger / discharger according to the embodiment. In FIG. 3, the housing 50 constituting the outer shell of the EV-PCS 4, a pair of holders 50 b and 50 c provided on the back surface 50 a side of the housing 50, and a pair of holders drawn from the back surface 50 a side of the housing 50 The charging / discharging cable 11 wound around 50b, 50c and the charging / discharging connector 12 provided in the edge part of the charging / discharging cable 11 are shown. The pair of holders 50b and 50c are for holding the charge / discharge cable 11 and the charge / discharge connector 12 when the charge / discharge connector 12 is not connected to the inlet of the EV 5. The charge / discharge cable 11 is wound around the pair of holders 50b, 50c, and the tip of the charge / discharge connector 12 provided on the charge / discharge cable 11 is fixed to the holder 50c.

  When charging / discharging, the user pulls out the charging / discharging connector 12 from the holder 50c, unplugs the charging / discharging cable 11 from the pair of holders 50b, 50c, brings the charging / discharging connector 12 to the vicinity of EV5, and the inlet of EV5. Insert into. After the insertion, the charge / discharge operation is started using the operation switch of the EV-PCS 4 main body, the home controller 30 or the home control device 31. After starting the charge / discharge operation, the EV-PCS 4 automatically and automatically charges and discharges with the EV 5 according to the operation status of the home load 70 connected to the residential distribution board 6 or the power generation status of the PV-PCS 3.

  When the user uses EV5, the user stops the charge / discharge operation using the operation switch of the EV-PCS4 main body, the home controller 30 or the home control device 31. After the charging / discharging operation is stopped, the user pulls out the charging / discharging connector 12 from the inlet of the EV 5, winds the charging / discharging cable 11 around the holders 50b, 50c, and finally inserts and fixes the charging / discharging connector 12 into the holder 50c.

  The charge / discharge cable 11 is a cabtire cable in which each of a plurality of electric wires is double insulated with a vinyl sheath. For the cabtire cable, a vinyl sheath may be used with emphasis on cost, and a rubber sheath may be used when emphasis is placed on handling at low temperatures. As the internal main power line, a heat-resistant vinyl electric wire having a size of 3.5 [sq] to 14 [sq] may be used, and a heat-resistant rubber electric wire may be used when the handling at a low temperature is important.

  In the quick charging cable, a heat-resistant rubber electric wire having a size of 22 [sq] or more is used. As a result, the weight is reduced and the handling property at low temperatures is improved, so that the user can easily use the configuration.

  Moreover, the charge / discharge cable 11 according to the present embodiment uses a vinyl sheath to reduce the cost. Further, the charge / discharge cable 11 according to the present embodiment uses a heat-resistant vinyl electric wire having a size of 3.5 [sq] to 14 [sq] for the internal main power line, so that the terminal voltage of the storage battery mounted on the EV 5 is 200. Even before and after [V], it can withstand 3 [kW] to 12 [kW], which is the full load capacity of a general household.

  The EV-PCS 4 according to the present embodiment can also be connected to a PHEV (Plug-in Hybrid Electric Vehicle) instead of the EV 5.

  Further, a resin having flame retardancy and insulation is used for the exterior of the charge / discharge connector 12. Thereby, not only the charge / discharge cable 11 but also the weight of the charge / discharge connector 12 can be reduced. Moreover, when resin is used for the exterior of the charging / discharging connector 12, it can reduce that a user feels cold when using the charging / discharging connector 12 in winter. In addition, the resin can be mass-produced and can be mass-produced as long as a mold can be prepared as compared to metal, so that it is expected to spread in large quantities in ordinary households.

  In the EV-PCS 4 configured as described above, the user uses the charging / discharging cable 11 and the charging / discharging connector 12 every time the EV 5 is used. In the charging / discharging cable 11 according to the present embodiment, A charging / discharging connector 12 that is thinner and lighter than the quick charging cable is used. Therefore, handling of the charging / discharging cable 11 by a user becomes easy.

  FIG. 4 is a diagram showing a main circuit of the charge / discharge system according to the embodiment. The EV 5 includes an inlet 90, a contactor 81 connected to the inlet 90, a main battery 82 that is LiB, a charging unit 83, an auxiliary battery 84, and a drive unit 85 that is connected to the inlet 90 and drives the contactor 81. And a vehicle control unit 86. The contactor 81 is a contactor that performs connection or disconnection between the main battery 82 and the inlet 90. The charging unit 83 charges the main battery 82 with electric power discharged from the auxiliary battery 84, electric power regenerated from the EV5 drive motor, and electric power received by an AC external input for normal charging. The drive unit 85 drives the contactor 81 to open and close by the control power supplied from the EV-PCS 4, the control power supplied from the vehicle control unit 86, and the control signal.

  The charge / discharge connector 12 includes a solenoid 92 therein. The solenoid 92 is an electrical component that converts electrical energy into mechanical motion using electromagnetic force. The solenoid 92 is a self-holding electromagnetic solenoid that holds a lock mechanism (to be described later) in a locked state so that the charge / discharge connector 12 connected to the inlet 90 does not come off from the inlet 90 during charge / discharge.

  The power converter 43 incorporates the main circuit and control function of the EV-PCS 4. In FIG. 4, the main circuit and control function of the EV-PCS 4 are provided in the power converter 43, but the main circuit and control function of the EV-PCS 4 may be provided in the EV-PCS 4. It may be provided at a place other than the converter 43.

  The power converter 43 includes a system linkage relay 51 that opens and closes AC power on the commercial system 9 side, reactors 52A and 52B, and inverter main circuits 53 and 54 that have a plurality of semiconductor switches and convert DC power into AC power. 55 and a diode 56. The diode 56 has an anode connected to a DC bus between the inverter main circuit 53 and the inverter main circuit 54, a cathode connected to the power supply unit 64, and inputs a current flowing through the DC bus to the power supply unit 64.

  The power converter 43 is disposed between the capacitor 57, the inverter main circuit 54 and the high-frequency insulation transformer 58 interposed between the inverter main circuits 53, 54, and 55, and the inverter main circuit 55 and the charge / discharge cable 11. The capacitor 59 is provided. The capacitor 57 has one end connected to the DC bus and the other end connected to the power supply unit 64, and smoothes the DC bus voltage and applies it to the power supply unit 64.

  The inverter main circuit 54, the inverter main circuit 55, and the high frequency insulation transformer 58 constitute a bidirectional converter circuit. The bidirectional converter circuit seamlessly supplies power output from the inverter main circuit 54 to the EV 5 while insulating between the inverter main circuit 54 and the inverter main circuit 55. The capacitor 59 smoothes the voltage applied to the bidirectional converter.

  In addition, the power converter 43 converts the AC power supplied from the commercial system 9 into DC power and supplies the power supply unit 64 with power and the inverter main circuits 53, 54, and 55. Drive units 61, 62, and 63 and a control unit 66 are provided. Each of the three drive units 61, 62, and 63 drives a semiconductor switch that constitutes each of the three inverter main circuits 53, 54, and 55 by a control signal output from the control unit 66.

  The power converter 43 includes a battery unit 65. The battery unit 65 controls the drive units 61, 62, 63, the control unit 66, the drive unit 85 in the EV 5, and the disconnecting switch 41 shown in FIG. Supply control power. With this configuration, the charging / discharging system 100 releases the contactor of the disconnecting switch 41 shown in FIG. 1 not only when the system is connected to the normal commercial system 9 but also when the commercial system 9 is interrupted. The self-sustained operation system is constructed by closing the contacts constituting the contactor 81.

  The control unit 66 controls the bidirectional converter circuit configured by the inverter main circuit 55 and the high frequency insulation transformer 58. The control unit 66 communicates with the vehicle control unit 86 in the EV 5 via the charge / discharge cable 11, the charge / discharge connector 12 and the inlet 90. The control unit 66 performs charge / discharge control of the main battery 82 by communicating with the vehicle control unit 86, and performs power control that follows the load fluctuation in the house and the fluctuation of the generated power amount of the solar cell 1.

  The solenoid 92 includes a set coil for locking the charging / discharging connector 12 connected to the inlet 90 so that the user cannot remove it during charging / discharging, and a reset coil for unlocking the lock. And have. These coils are energized and controlled by the control unit 66. By providing the solenoid 92, even when the charge / discharge cable 11 is disconnected and the control signal output from the control unit 66 disappears, the mechanical operation state is maintained.

  FIG. 5 is a diagram showing a circuit of an interface portion between the power converter and the EV shown in FIG. A circuit provided in the power converter 43 and the charge / discharge connector 12 shown in FIG. 1 is shown on the left side of the drawing, and a circuit provided in the EV 5 shown in FIG. 1 is shown on the right side of the drawing. The control power supply Vcc1 is a power supply supplied from the EV-PCS 4 shown in FIG. The control power source Vcc2 is a power source supplied from the vehicle control unit 86 shown in FIG. An example of the voltage of the control power supplies Vcc1 and Vcc2 is 12 [V].

  In the circuit diagram on the upper side of the drawing, one end of a charge / discharge start switch 26 is connected to the control power supply Vcc1. One end of a first charging start / stop line 40a is connected to the other end of the switch 26. The other end of the first charging start / stop line 40a is connected to the anode of a diode arranged on the primary side of the photocoupler 16 via a resistor. The cathode of the diode is grounded.

  The other end side of the first charge start / stop line 40a is connected to two solenoids that drive the two switches constituting the contactor 81, and further connected to the anode of a diode arranged on the primary side of the photocoupler 17. Is done.

  One end of a switch 15 is connected to each of the two solenoids. The switch 15 for driving the contactor 81 is provided in the drive unit 85 shown in FIG. The other end of the switch 15 is connected to one end of the second charge start / stop line 40b. The other end of the switch 15 is connected to the cathode of a diode disposed on the primary side of the photocoupler 17 via a resistor.

  The other end of the second charge start / stop line 40b is connected to one end of a switch 27 for starting charge / discharge. The other end of the switch 27 is connected to the ground FG1 on the power converter 43 side, one end of the connector connection confirmation line 40c, and one end of the ground line 40e in the charge / discharge connector 12.

  The other end of the connector connection confirmation line 40c is connected to the cathode of a diode arranged on the primary side of the photocoupler 13 via a resistor. The anode of the diode is connected to the control power supply Vcc2.

  The other end of the ground line 40e is connected to the negative electrode of the control power source 19 and to the ground FG2 on the EV5 side. The control power source 19 is a power source supplied from the auxiliary battery 84 shown in FIG. 4, and the voltage of the control power source 19 can be exemplified as 12 [V].

  The collector of the transistor 18 is connected to one end of the charge permission prohibition line 40d, and the emitter of the transistor 18 is grounded. One end of the charge permission prohibition line 40d is connected to the cathode of the diode on the primary side of the photocoupler 25 via a resistor. The anode of the diode is connected to the control power supply Vcc1.

  The transistor 18 causes a current to flow through a primary side diode of the photocoupler 25 on the EV-PCS 4 side or stop a current flowing through the diode by a charging signal output from the vehicle control unit 86 illustrated in FIG. This is for controlling charging / discharging permission from the EV 5 side to the EV-PCS 4. The photocoupler 25 disposed on the power converter 43 side is for transmitting the signal to the control unit 66 shown in FIG. 4 while insulating the charge / discharge permission prohibition signal output from the EV 5.

  In this configuration, the contactors 81 are closed by closing the charge / discharge start switches 26 and 27 and the switch 15 on the power converter 43 side. As a result, the voltage of the main battery 82 is applied to the inlet 90, and charging and discharging are possible.

  When the charge / discharge connector 12 is connected, the photocoupler 13 for confirming the connection of the charge / discharge connector 12 has a current that is applied to the primary side diode of the photocoupler 13, the connector connection confirmation line 40c, and the power converter 43 side. The current flows to the ground FG2 of EV5 via the ground FG1 and the ground line 40e. As a result, the primary diode of the photocoupler 13 emits light, and the connection information of the charge / discharge connector 12 is transmitted to the vehicle control unit 86 shown in FIG.

  The photocouplers 16 and 17 insulate the charge / discharge start signal output from the EV-PCS 4 and transmit it to the vehicle control unit 86 of the EV 5.

  CAN (Controller Area Network) communication lines 40g and 40f are used for data transfer between the power converter 43 and the EV5. The power converter 43 and the EV 5 transmit voltage information to each other via the CAN communication lines 40g and 40f. In addition, the power converter 43 and EV5 use CAN communication lines 40g and 40f, and hardware that realizes connector connection confirmation, charge / discharge permission, charge / discharge prohibition, charge / discharge start, and charge / discharge stop. Using it, the disconnection or short circuit of the charge / discharge cable 11 is detected, and further the abnormality of the apparatus is detected in multiple. Thereby, the power converter 43 and EV5 can stop and protect the mutual electricity supply of an apparatus.

  The resistance detector 93 detects the resistance value of the coil of the solenoid 92. Since the solenoid 92 is not energized during charging / discharging, the solenoid 92 does not self-heat, and the resistance value of the coil depends on the ambient temperature of the coil, that is, the internal temperature of the charging / discharging connector 12. The resistance value detected by the resistance detector 93 is transmitted to the control unit 66 shown in FIG. The electromagnetic switch 94 controls the energization current to the solenoid 92. Further, the electromagnetic switch 94 energizes the set side of the solenoid 92 for a short time immediately before energization in order to prevent the charge / discharge connector 12 from dropping off during energization. As a result, the charging / discharging connector 12 and the inlet 90 are locked, and the user cannot remove the charging / discharging connector 12. In this state, even if the power supply of the solenoid 92 is lost, the locked state is maintained.

  When charging / discharging is completed and the charging / discharging connector 12 is removed, the user stops charging / discharging using the operation switch of the EV-PCS 4 body, the home controller 30 or the home control device 31. The electromagnetic switch 94 after charging / discharging has stopped energizing for a short time to the reset side of the solenoid 92 immediately before starting energization. As a result, the charge / discharge connector 12 is unlocked, and the user can remove the charge / discharge connector 12 from the inlet 90.

  FIG. 6 is a view showing a cross section of a charge / discharge connector and a charge / discharge cable used in the charge / discharge system according to the embodiment. The charge / discharge connector 12 includes a housing 101 fitted into the inlet 90 of the EV 5 shown in FIG. 4 and a connector case 102 disposed between the housing 101 and the charge / discharge cable 11. The charging / discharging connector 12 includes a metal connector pin 104 that is fixed inside the housing 101 and connected to the main power line 105 inside the connector case 102.

  The connector case 102 is made of a resin having flame resistance, insulation, drop resistance, and chemical resistance. In general, a quick-charge connector is often made of metal as a connector case constituting its outer shell, which is heavier than that of a resin. The charge / discharge connector 12 according to the present embodiment is lighter than a metal connector because the connector case 102 is made of resin and the inside thereof is hollow. Moreover, since the charging / discharging connector 12 is comprised with resin, the outer shell of the charging / discharging connector 12 does not corrode with salt, and the reliability in a salt damage place is high.

  The connector pin 104 contacts a metal electrode (not shown) provided on the inlet 90 side when the housing 101 is inserted into the inlet 90 of the EV 5. As a result, a metal electrode (not shown) provided on the inlet 90 side and the main power line 105 are connected via the connector pin 104. For the main power line 105, a heat-resistant vinyl electric wire having a size of 3.5 [sq] to 14 [sq] is used. The main power line 105 is a part of a plurality of internal wirings of the charge / discharge cable 11, and its end is inserted into the connector case 102.

  A connector pin 104 is connected to the tip of the main power line 105. When main power line 105 is connected to connector pin 104, a charge / discharge current flows between the main circuit of power converter 43 shown in FIG. 4 and charging unit 83 of EV 5. The main power line 105 is connected to the charge / discharge cable 11 via the fuse 91. The outer peripheral surface of the fuse 91 is covered with a heat conductive resin 109 which is a heat radiating member.

  The charge / discharge connector 12 includes a latch 106 provided inside the connector case 102 so as to rotate about the support shaft 106a, a latch release button 107, a lever 110, and a spring 108 that urges the lever 110. Prepare. The lever 110 is provided inside the connector case 102 so as to rotate about the support shaft 110a as the latch release button 107 moves. The latch 106, the spring 108, and the lever 110 constitute a lock mechanism that prevents the charge / discharge connector 12 connected to the EV 5 from being removed.

  A convex portion 106 b is formed on one end side of the latch 106. In FIG. 6, a state in which the convex portion 106 b enters the opening 101 a formed in the housing 101 is shown. The end of the convex portion 106 b is formed in a wedge shape that is engaged with the inlet 90. The other end 106 c of the latch 106 is in contact with one end 110 b of the lever 110. One end 110 b side of the lever 110 is biased by the spring 108. The other end 110 c of the lever 110 is in contact with the latch release button 107.

  When the user inserts the charging / discharging connector 12 into the inlet 90, the inclined surface of the convex portion 106b of the latch 106 contacts the inlet 90, and the latch 106 rotates counterclockwise. At this time, the lever 110 connected to the latch 106 rotates clockwise against the biasing force of the spring 108. Thereby, the convex portion 106 b of the latch 106 is not caught by the inlet 90, and the housing 101 is fitted into the inlet 90.

  When the insertion of the housing 101 into the inlet 90 is completed, the convex portion 106b of the latch 106 is caught in the concave portion formed in the inlet 90, so the charge / discharge connector 12 cannot be pulled out as it is. When the charging / discharging connector 12 is pulled out, when the user depresses the latch release button 107, the lever 110 rotates clockwise against the urging force of the spring 108, and the latch 106 pressed by the lever 110 rotates counterclockwise. To turn. Thereby, the fitting state of the convex part 106b and the inlet 90 is cancelled | released.

  A solenoid 92 is provided inside the connector case 102 so as to face the lever 110. In the present embodiment, the set coil and the reset coil constituting the solenoid 92 are covered with resin. A solenoid 92 shown in FIG. 6 includes a housing 92a formed of the resin and a movable piece 92b provided on the housing 92a. The movable piece 92b moves forward and backward in a direction facing the lever 110 by energization of the coil.

  The movable piece 92b includes a shaft 92b1 that passes through a through hole 92a1 formed in the housing 92a, and a pressing member 92b2 that is provided at the tip of the shaft 92b1 and presses the lower surface of the lever 110. When the movable piece 92b operates in the vertical direction, the outer peripheral surface of the shaft 92b1 slides with the inner peripheral surface of the through hole 92a1. In the present embodiment, the outer peripheral surface of the shaft 92b1 or the inner peripheral surface of the through hole 92a1 is referred to as the sliding portion 120 of the movable piece 92b.

  The pressing member 92b2 of the movable piece 92b is provided to face the other end 110c of the lever 110. When the coil for setting is energized, the shaft 92b1 is pushed out to the lever 110 side, and the pressing member 92b2 comes into contact with the lower surface of the other end 110c of the lever 110. This restricts the movement of the other end 110c of the lever 110 in the vertical direction. When the reset coil is energized, the shaft 92b1 of the movable piece 92b is pulled back to the side opposite to the lever 110, and the pressing member 92b2 is separated from the other end 110c of the lever 110. Thereby, the other end 110c of the lever 110 can be moved in the vertical direction.

  When the shaft 92b1 of the movable piece 92b is moved to the set side, the pressing member 92b2 of the movable piece 92b is pressed against the other end 110c of the lever 110. Therefore, the user cannot push down the latch release button 107, and the charge / discharge connector 12 cannot be removed.

  On the other hand, when the shaft 92b1 of the movable piece 92b is operated to the reset side, a gap is formed between the other end 110c of the lever 110 and the pressing member 92b2 of the movable piece 92b as shown in the illustrated example. Therefore, the user can push down the latch release button 107 and can pull out the charge / discharge connector 12.

  As shown in FIG. 6, the connector case 102 is formed with one water supply port 111 and two drainage ports 112. The water supply port 111 is a through hole for supplying cleaning water for cleaning the salt adhering to the sliding portion 120 into the connector case 102. The water supply port 111 is formed in the upper part of the connector case 102. When the water supply port 111 is viewed from the lower part to the upper part of the connector case 102, the water supply port 111 is disposed on the vertical line 130. The vertical line 130 is a virtual straight line that passes over the casing 92a of the solenoid 92 and extends in the vertical direction.

  A closing member 113 that closes the water supply port 111 is fitted into the water supply port 111. When the inside of the connector case 102 is not washed, the closing member 113 is fitted into the water supply port 111, and when the inside of the connector case 102 is washed, the closing member 113 is removed from the water supply port 111.

  Each of the two drain ports 112 is a through hole for discharging the cleaning water supplied to the inside of the connector case 102 to the outside of the connector case 102. Of the two drain ports 112, one drain port 112 is formed near the charge / discharge cable 11 in the lower part of the connector case 102. Of the two drain ports 112, the other drain port 112 is formed near the housing 101 in the lower part of the connector case 102.

  The cleaning water supplied from the water supply port 111 is transmitted along the inner surface of the connector case 102 to the lower part of the connector case 102, is transmitted through the surface of the latch release button 107 to the lever 110, and from the water supply port 111 in the vertical direction. Falls to the solenoid 92. A portion of the cleaning water that has reached the lever 110 falls vertically from the lever 110 and reaches the solenoid 92.

  The washing water that has reached the solenoid 92 is supplied to the sliding portion 120, and the fixed salt content that is sea salt particles adhering to the sliding portion 120 is washed with the washing water. The wash water after washing containing salt is drained from the drain port 112. The washing water supplied from the water supply port 111 does not necessarily need to be drained from the drain port 112, and may be drained from a gap between the through hole 114 through which the latch release button 107 passes and the latch release button 107. You may drain from the clearance gap between the convex part 106b and the opening part 101a.

  As described above, in the charge / discharge connector 12 according to the present embodiment, the fixed salt adhering to the sliding portion 120 is cleaned by the cleaning water supplied through the water supply port 111.

  In addition, as a supply method of the washing water to the sliding part 120, the method of supplying the washing water poured from the water supply port 111 to the sliding part 120 may be used, or the tip of a nozzle (not shown) is provided in the water supply port 111. Alternatively, after the tip of the nozzle is moved to the vicinity of the sliding portion 120, the cleaning water poured from the nozzle may be supplied to the sliding portion 120.

  In the solenoid 92, since the gap formed between the shaft 92b1 and the through hole 92a1 is narrow, in the charge / discharge connector 12 installed in the salt damage area, the sea salt particles adhere to the sliding portion 120 and harden. The friction of the sliding part 120 may increase, and the solenoid 92 may become inoperative.

  The connector case 102 has a through-hole 114 through which the latch release button 107 passes, and the housing 101 has an opening 101a. Therefore, sea salt particles enter the connector case 102 from the gap between the latch release button 107 and the through hole 114, and sea salt enters the connector case 102 from the gap between the convex portion 106b and the opening 101a. Particles penetrate. The sea salt particles that have entered the inside of the connector case 102 are fixed inside the connector case 102 and are difficult to come out of the connector case 102. Therefore, it is necessary to wash the sea salt particles.

  In particular, magnetic steel having magnetism is used for the shaft 92b1 of the solenoid 92 in order to generate attraction and repulsion by electromagnetic force. Since this electromagnetic steel has a remarkable progress of rust compared to metals such as aluminum and stainless steel, in order to maintain the function of EV-PCS4, the effect of removing the salinity of the sliding portion 120 by providing the water supply port 111 is high. .

  In the charge / discharge connector 12 according to the present embodiment, by providing the water supply port 111, the cleaning water can be supplied to the sliding portion 120 without disassembling the connector case 102, so that the water supply port 111 is generally not provided. Compared to a charge / discharge connector, the fixed salt attached to the sliding portion 120 can be easily washed, and the work time required to remove the fixed salt can be greatly reduced.

  Further, in the charge / discharge connector 12 according to the present embodiment, by providing the water supply port 111, work such as disassembly and reassembly of the connector case 102 becomes unnecessary, and maintenance of the charge / discharge connector 12 can be easily performed regardless of the skill of the operator. Is possible.

  Further, in the charge / discharge connector 12 according to the present embodiment, by providing the drain port 112, it is not necessary to drain the cleaning water inside the connector case 102 from the water supply port 111, and thus cleaning after cleaning with a high salt concentration is performed. Water does not touch the solenoid 92, and the cleaning effect of the solenoid 92 can be enhanced.

  Further, in the charge / discharge connector 12 according to the present embodiment, by providing the closing member 113, even if the water supply port 111 is formed, the salt water to the inside of the connector case 102 is not washed when the inside of the connector case 102 is not washed. Intrusion is suppressed, and salt water can be prevented from being directly applied to the sliding portion 120. Therefore, the maintenance frequency of the solenoid 92 can be suppressed. Further, by providing the closing member 113, it is possible to suppress non-operation due to not only salt but also dust such as dust and sand adhering to the sliding portion 120. Further, the drain port 112 may be provided with a member similar to the closing member 113, and by closing the drain port 112 with such a member, the intrusion of dust into the connector case 102 can be further suppressed.

  In the present embodiment, the closing member 113 is fitted into the water supply port 111, but the water supply port 111 may be closed using a fastening member such as a screw or a bolt instead of the closing member 113. Further, for cleaning the sliding portion 120, a cleaning solution that can remove at least one of salt, impurities other than salt, and rust may be used instead of the cleaning water.

  FIG. 7 is a diagram illustrating a configuration example of the home control apparatus illustrated in FIG. The in-home control device 31 has various operations on the operation control unit 31a that controls the operation of the EV-PCS 4 and the in-house load 70, the operation state measurement unit 31b that measures the operation state of the EV-PCS 4, and the display 310 of the in-home control device 31. A display control unit 31c for displaying information.

  The operation status information indicating the operation status measured by the operation status measurement unit 31b is input to the display control unit 31c. The display control unit 31 c visualizes and displays the operation status information regarding the operation time and the number of operations on the display 310 of the in-home control device 31.

  The operation status information can exemplify the operation time of the EV-PCS 4 or the number of operations of the solenoid 92 shown in FIG. Examples of the operation time of the EV-PCS 4 include a time from the time when the EV-PCS 4 is installed to the latest time, or a time from the time when the EV-PCS 4 is shipped from the factory to the latest time. Moreover, as the operation | movement frequency of the solenoid 92, the frequency | count counted from the time of EV-PCS4 installation to the latest time can be illustrated.

  FIG. 8 is a flowchart illustrating a process in which the operation state measurement unit illustrated in FIG. 7 calculates the operation time of the EV-PCS based on the operation state information. The driving state measuring unit 31b acquires the driving state information of the control unit 66 from the control unit 66 shown in FIG. 4 (step S1), and the ON state of the control unit 66 included in the driving state information is determined as the driving state measuring unit 31b. The operation time of the EV-PCS 4 from the start of energization to the control unit 66 to the latest time is calculated (step S2).

  FIG. 9 is a flowchart illustrating a process in which the operation state measurement unit illustrated in FIG. 7 calculates the number of energizations of the solenoid based on the operation state information. The operation state measurement unit 31b acquires the energization history information of the solenoid 92 from the control unit 66 shown in FIG. 4 (step S21), and counts the energization frequency to the solenoid 92 included in the energization history information, thereby obtaining the EV-PCS4. The number of energizations of the solenoid 92 from the time when is installed to the most recent time is calculated (step S22).

  A specific example of a display example will be described in the display control unit 31c. When the operation status information is an operation time, the display control unit 31c displays the operation time as “XX time” on the display 310 of the home control device 31 and operates. When the status information is the number of operations, the display control unit 31c causes the display 310 of the home control device 31 to display the number of operations as “XX times”. At this time, the display control unit 31c may display a time when maintenance of the solenoid 92 shown in FIG. 6 is necessary, such as “requires maintenance of the charge / discharge connector 12 around ZZ in YY”. The remaining number of times until the number of operations requiring maintenance of 92 is reached may be displayed as “the charge / discharge connector 12 needs maintenance if the Y / Y rotation of the charge / discharge connector 12 is used later”.

  According to the present embodiment, the user can periodically perform maintenance of the charge / discharge connector 12 in accordance with the display contents on the display 310 of the in-home control device 31, so that the fixed salinity adhered to the sliding portion 120 Problems are suppressed, and the connector case 102 can be used for a long time. Further, during the maintenance of the connector case 102, it is possible to save the trouble of searching for an instruction manual describing the contents of the maintenance of the connector case 102, and searching for the time and the number of operations that require maintenance.

  In the present embodiment, a configuration example in which at least one of the operation time of the EV-PCS 4 and the number of operations of the solenoid 92 is displayed on the home control device 31 has been described, but it is equivalent to the display 310 shown in FIG. Is provided in the EV-PCS 4, and the EV-PCS 4 is provided with functions equivalent to the operation state measuring unit 31 b and the display control unit 31 c of the in-home control device 31 shown in FIG. 7, and the EV-PCS 4 is operated as described above. Further, at least one of the number of operations may be displayed.

  Further, in the present embodiment, the configuration example has been described in which the maintenance time is notified to the user using the operation time of the EV-PCS 4 and the number of operations of the solenoid 92. However, the solenoid 92 detected using the conductive sensor and the weight sensor is used. When the amount of adhering salt reaches a certain value, message information that prompts that maintenance is required may be displayed.

  FIG. 10 is a diagram illustrating a configuration example of hardware for realizing the home control apparatus illustrated in FIG. When the processing circuit of the home control device 31 shown in FIG. 7 is realized by the memory 141 and the CPU (Central Processing Unit) 142, each function of the processing circuit of the home control device 31 is software, firmware, or software and firmware. Realized by combination. Software or firmware is described as a program and stored in the memory 141.

  In the processing circuit, each function is realized by the CPU 142 reading and executing the program stored in the memory 141. It can also be said that the program stored in the memory 141 causes the computer to execute the procedure and method of the home control device 31. Here, the CPU 142 may be a processing device, an arithmetic device, a microprocessor, a microcomputer, a processor, or a DSP (Digital Signal Processor). The memory 141 includes a nonvolatile or volatile semiconductor memory such as a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, an EPROM (Erasable Programmable ROM), an EEPROM (registered trademark) (Electrically EPROM). Any one of a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, and a DVD (Digital Versatile Disc) is applicable.

  The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

  DESCRIPTION OF SYMBOLS 1 Solar cell, 2, 7 change-over switch, 3 PV-PCS, 4 EV-PCS, 5 EV, 6 Residential distribution board, 6a Main breaker, 6b Branch breaker, 8 Main leakage breaker, 9 Commercial system, 10 Maintenance circuit breaker, 11 Charging / discharging cable, 12 Charging / discharging connector, 13, 16, 17, 25 Photocoupler, 15, 26, 27 Switch, 18 transistor, 19 Power supply for control, 21,71 Common terminal, 22,23 , 72, 73 terminals, 24, 74 contacts, 30 home controller, 31 home control device, 31a operation control unit, 31b operation state measurement unit, 31c display control unit, 40 overcurrent circuit breaker, 40a first charge start / stop line 40b Second charge start / stop line, 40c Connector connection confirmation line, 40d Charge permission prohibition line, 40e Ground line, 40f, 40g CAN communication Wire, 41 Switch for disconnection, 42 Current transformer, 43 Power converter, 50, 92a Case, 50a Back, 50b, 50c Holder, 51 System linkage relay, 52A, 52B Reactor, 53, 54, 55 Inverter Main circuit, 56 diode, 57, 59 capacitor, 58 high frequency isolation transformer, 60 rectifier circuit, 61, 62, 63, 85 drive unit, 64 power supply unit, 65 battery unit, 66 control unit, 70 residential load, 81 contactor, 82 main battery, 83 charging unit, 84 auxiliary battery, 86 vehicle control unit, 90 inlet, 91 fuse, 92 solenoid, 92a1, 114 through hole, 92b movable piece, 92b1 shaft, 92b2 pressing member, 94 electromagnetic switch, 100 charge / discharge system, 101 housing, 101a opening, 102 connector case, 104 connector pin, 105 main power line, 106 latch, 106a, 110a spindle, 106b convex, 106c, 110c the other end, 107 latch release button, 108 spring, 109 thermal conductivity Resin, 110 lever, 110b one end, 111 water supply port, 112 drainage port, 113 closing member, 120 sliding part, 130 vertical line, 141 memory, 142 CPU, 200 host system, FG1, FG2 ground, Vcc1, Vcc2 control power supply, a, b, c, e, f, g, h Wiring.

Claims (9)

A charger / discharger comprising a charging / discharging unit that controls at least one of charging of a storage battery mounted on a vehicle and discharging of the storage battery,
A cable for electrically connecting the charge / discharge unit and the storage battery;
A connector provided on the cable and connected to the vehicle,
The connector is provided in a connector case, a connector case, a lock mechanism that prevents the connector connected to the vehicle from being removed, and a connector mechanism that is provided in the connector case to lock the lock mechanism. A solenoid to hold,
The connector case is formed with a water supply port for supplying water for cleaning the sliding portion of the solenoid into the connector case.   The charger / discharger according to claim 1, wherein the connector case has the water supply port formed in an upper part of the connector case.   The charger / discharger according to claim 2, wherein the connector case has the water supply port formed on an upper side of the solenoid.   The charger / discharger according to any one of claims 1 to 3, wherein the connector case is provided with a closing member that closes the water supply port. An indicator,
An operating state measuring unit for measuring the operating state of the charger / discharger;
The display control part which displays the operation time of the said charging / discharging device measured by the said operation state measurement part, or the frequency | count of the operation of the said solenoid on the said indicator is provided, These are provided. The charger / discharger according to one item. The operating time of the charger / discharger is the time from the time when the charger / discharger is installed to the latest time,
6. The charger / discharger according to claim 5, wherein the number of operations of the solenoid is a number counted up to the most recent time from the time when the charger / discharger is installed.   The charger / discharger according to any one of claims 1 to 6, wherein the connector case is formed with a drain port for discharging water supplied into the connector case. The charger / discharger according to any one of claims 1 to 7,
A charging / discharging system comprising: a control indicator for controlling the charging / discharging device and displaying an operating state of the charging / discharging device. The control indicator is
An indicator,
An operating state measuring unit for measuring the operating state of the charger / discharger;
The charge / discharge system according to claim 8, further comprising: a display control unit configured to display the operation time of the charger / discharger or the number of operations of the solenoid measured by the operation state measurement unit on the display.

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