JP2019149892A - Charging device for vehicle, connection method, charger, and parking lot - Google Patents

Abstract

To provide a charging device for a vehicle that can be installed in many places, a connection method for connecting a charger to a ground installed type voltage transformer, a charger, and a parking lot that includes the charging device for the vehicle.SOLUTION: A charging device for a vehicle (3) including a voltage transformer (11), has a ground installed type voltage transforming device (1) that is connected to an external distribution line (4), steps down the voltage supplied from the distribution line (4) by the voltage transformer (11), and supplies the voltage after stepped-down to the outside, and a charger (2) connected to the ground installed type voltage transforming device (1) and charging a vehicle (6) by using the stepped-down voltage.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle charging device that charges a vehicle including a battery, a connection method for connecting a charger to a transformer device, a charger, and a parking lot that includes the vehicle charging device.

  Distribution lines for supplying power from substations to various locations are sometimes installed underground. When a distribution line is installed underground, a ground-mounted transformer is installed on the ground. The ground-mounted transformer is connected to a distribution line arranged underground, and transforms a high voltage into a low voltage that can be used by consumers such as homes or business establishments. The ground-mounted transformer device has a configuration in which, for example, a transformer is disposed in a rectangular parallelepiped box. For example, a ground-mounted transformer is installed on a sidewalk near a roadway.

JP 2012-39964 A

  As vehicles equipped with batteries that need to be charged, such as electric vehicles or plug-in hybrid vehicles, spread, it is necessary to increase the number of vehicle charging devices that charge vehicles. Even if a distribution line is arranged underground, there is no means for supplying power from the distribution line to the vehicle charging device, so it is difficult to install a large number of vehicle charging devices in the vicinity of the road. Under the present circumstances, the electric power supplied with respect to a consumer is further supplied to the charging device for vehicles. Since several tens of kW of electric power is required to rapidly charge a vehicle, the place where the vehicle charging device can be installed is limited to a place equipped with a large-scale power receiving facility such as a commercial facility. ing. Thus, it is difficult to significantly increase the vehicle charging device.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a vehicular charging device that can be installed in many places by using a ground-mounted transformer, and a ground-mounted type It is providing the parking method provided with the connection method for connecting a charger to a transformer, a charger, and the charging device for vehicles.

  The vehicle charging device according to the present invention has a transformer, is connected to an external distribution line, steps down the voltage supplied from the distribution line by the transformer, and supplies the voltage after step-down to the outside. An installation type transformer device and a charger that is connected to the ground installation type transformer device and charges the vehicle using the voltage after the step-down operation are provided.

  In the present invention, the vehicle charging device includes a ground-mounted transformer device and a charger that charges the vehicle. The charger performs charging using the voltage transformed by the ground-mounted transformer. The vehicle charging device can be installed in any place where a ground-mounted transformer device is installed. For this reason, it is possible to install the charging device for vehicles in many places.

  The vehicle charging device according to the present invention further includes a blower for cooling the transformer, and a blow control unit that controls the operation of the blower according to the operation of the transformer.

  In the present invention, the transformer is cooled by a blower. Cooling suppresses an increase in the temperature of the transformer. For this reason, the occurrence of a disaster and the deterioration of the transformer caused by the rise in temperature are suppressed.

  In the vehicle charging device according to the present invention, the ground-mounted transformer is installed on the side of a roadway, and the ground-mounted transformer is configured to send the wind blown by the blower to the center side of the roadway. It further has a discharge port for discharging toward it.

  In the present invention, the ground-mounted transformer is installed on the side of the roadway, and a discharge port is provided so that the wind blown by the blower is discharged to the roadway side. It is unlikely that wind will be blown to passers-by on the sidewalk. For this reason, it is suppressed that a hot wind is blown to a passerby.

  The vehicle charging device according to the present invention further includes a power line that supplies power from the ground-mounted transformer to the charger, and the ground-mounted transformer is connected to a secondary side of the transformer. It further has a secondary terminal, and the power line is connected to the secondary terminal.

  In the present invention, a power line is connected to the secondary terminal of the ground-mounted transformer, and power is supplied from the ground-mounted transformer to the charger through the power line. The voltage stepped down by the transformer is supplied from the secondary side terminal, and the charger can charge using the stepped down voltage.

  In the vehicle charging device according to the present invention, the charger includes a charging unit that performs charging processing according to charging, and a display unit that displays the amount of charged power, the charging time, or the charging amount. And

  In the present invention, the charger includes a charging unit that performs charging processing according to charging, and a display unit that displays the amount of charged power, the charging time, or the charging amount. Electricity for charging the vehicle can be sold by the processing of the charging unit. The user can grasp the charging status or result by checking the information displayed on the display unit.

  In the vehicular charging apparatus according to the present invention, the charger further includes a power transmission unit that transmits power to be charged to the vehicle in a non-contact manner.

  In the present invention, the charger includes a power transmission unit that transmits power in a contactless manner. The charger uses a power transmission unit to charge the vehicle in a non-contact manner.

  The vehicle charging device according to the present invention is characterized in that the power transmission unit is embedded in a road.

  In the present invention, the power transmission unit is embedded. Since the power transmission unit is embedded under the roadway, it is possible to easily bring the vehicle on the roadway close to the power transmission unit and easily charge the vehicle.

  The vehicle charging device according to the present invention further includes a power receiving unit that receives power from the vehicle and supplies the received power to the outside.

  In the present invention, the vehicle charging device can receive electric power from the vehicle and supply the electric power to the outside. For this reason, electric power can be supplied from a vehicle to a consumer.

  The charger connection method according to the present invention is such that a charger for charging a vehicle is installed in the vicinity of a ground-mounted transformer, and a power line for supplying power to the charger is connected to the ground-mounted transformer. And the power line is connected to a secondary terminal of the ground-mounted transformer.

  In the present invention, a power line connected to a charger is made to enter the housing of the ground-mounted transformer device, and the power line is connected to the secondary terminal of the ground-mounted transformer device, thereby Configure. A vehicle charging device can be configured using an existing ground-mounted transformer.

  The charger according to the present invention is a charger that charges a vehicle, and is connected to a ground-mounted transformer, and charges the vehicle using a voltage stepped down by the ground-mounted transformer. And a blower for cooling the inside of the ground-mounted transformer device.

  In the present invention, the charger is connected to the existing ground-mounted transformer, and charges the vehicle using the voltage stepped down by the ground-mounted transformer. Moreover, a charger is provided with an air blower, and an air fan cools the inside of a ground installation type transformation apparatus. Thereby, the transformer with which a ground installation type transformer is equipped is cooled, and the raise of the temperature of a transformer is suppressed.

  The parking lot which concerns on this invention is equipped with the charging device for vehicles which concerns on this invention in the parking lot which can park a vehicle and is charged according to parking time.

  In the present invention, the vehicle charging device is installed in a parking lot. A vehicle parked in the parking lot can be charged using a vehicle charging device.

  In the present invention, the vehicular charging device configured using the ground-mounted transformer can be installed in many places. Therefore, the present invention has an excellent effect, for example, it is possible to greatly increase the number of vehicle charging devices.

1 is a perspective view schematically showing an external appearance of a vehicle charging device according to Embodiment 1. FIG. It is a perspective view which shows typically the connection aspect of a ground installation type transformation apparatus and a distribution line. It is a block diagram which shows the structure inside the charging device for vehicles which concerns on Embodiment 1. FIG. It is a schematic diagram which shows the form by which a vehicle is charged with the charging device for vehicles which concerns on Embodiment 1. FIG. It is a flowchart which shows the procedure of the process of the charge which the charging device for vehicles performs. It is a block diagram which shows the structure inside the charging device for vehicles which concerns on Embodiment 2. FIG. It is a perspective view which shows typically the external appearance of the charging device for vehicles which concerns on Embodiment 3. FIG. It is a block diagram which shows the structure inside the charging device for vehicles which concerns on Embodiment 3. FIG. It is a perspective view which shows typically the external appearance of the charging device for vehicles which concerns on Embodiment 4. FIG. It is a block diagram which shows the other structural example inside the charging device for vehicles which concerns on Embodiment 4. FIG. It is a schematic diagram which shows the example of the parking lot provided with the charging device for vehicles which concerns on Embodiment 5. FIG.

Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.
(Embodiment 1)
FIG. 1 is a perspective view schematically showing the appearance of the vehicle charging device 3 according to the first embodiment. The vehicle charging device 3 includes a ground-mounted transformer device 1 and a charger 2 that charges the vehicle. In FIG. 1, the external appearance mainly seen from the roadway side of the ground installation type transformer device 1 and the charger 2 is shown. The ground-mounted transformer 1 is connected to a distribution line arranged in the basement, and steps down the voltage supplied from the distribution line to a voltage that can be used by a consumer such as a home or a business establishment. The ground-mounted transformer 1 is installed on the sidewalk of the sidewalk. That is, the ground-mounted transformer device 1 is installed on the side of the roadway. The charger 2 is disposed in the vicinity of the ground-mounted transformer device 1.

  FIG. 2 is a perspective view schematically showing a connection mode between the ground-mounted transformer device 1 and the distribution line. In FIG. 2, the external appearance seen from the sidewalk side of the ground installation type transformer 1 and the charger 2 is mainly shown. The distribution line 4 is arranged underground along the road. The distribution line 4 is an electric wire for supplying electric power from a substation to various places. The ground-mounted transformer 1 is connected to the distribution line 4. The ground-mounted transformer 1 is further connected to a lead-in wire 5 that is an electric wire for supplying power to the consumer. The lead-in wire 5 is arrange | positioned in the basement and is connected to the electric equipment which a consumer has. The ground-mounted transformer 1 steps down the voltage supplied through the distribution line 4 and supplies the stepped down voltage to the consumer through the lead-in line 5. Furthermore, the charger 2 is connected to the ground-type transformer 1 through the power line 231. In FIG. 2, the distribution line 4 and the power line 231 are indicated by broken lines, and the lead-in line 5 is indicated by a one-dot chain line. FIG. 2 shows an example in which the power line 231 is arranged underground. The power line 231 may be arranged on the ground.

  FIG. 3 is a block diagram illustrating an internal configuration of the vehicle charging device 3 according to the first embodiment. In addition, FIG. 3 does not limit the position of each part of the ground-mounted transformer device 1 and the charger 2. The ground-mounted transformer 1 has a rectangular parallelepiped casing 12. For example, the housing 12 is configured by combining steel plates. The other part of the ground-mounted transformer 1 is disposed in the housing 12. The housing 12 is provided with a door 122. For example, the door 122 is provided on one side surface of the housing 12. The housing 12 is provided with a discharge port 121 for discharging the air inside the housing 12 to the outside. In addition, a suction port (not shown) for taking air into the housing 12 is also provided in the housing 12. A louver is attached to the discharge port 121 and the suction port. The gallery is a panel in which a plurality of blind blades are arranged with a gap between them, and covers the discharge port 121 and the suction port while allowing ventilation.

  A transformer 11 is disposed inside the housing 12. The transformer 11 includes a rectangular parallelepiped transformer tank 112 and a transformer main body 111 accommodated in the transformer tank 112 together with insulating oil. A radiator 15 is attached to the transformer tank 112. The radiator 15 includes a flow path through which a fluid carrying heat flows, and a heat radiating plate that radiates the heat of the fluid flowing through the flow path. Between the radiator 15 and the inside of the transformer tank 112, a fluid for carrying heat circulates. The fluid is, for example, insulating oil in the transformer tank 112.

  A blower 161 is disposed inside the housing 12. The blower 161 is disposed at a position where wind is applied to the heat radiating plate of the radiator 15. When the wind from the blower 161 hits the radiator plate of the radiator 15, the heat of the fluid flowing through the passage of the radiator 15 is radiated, the heat inside the transformer tank 112 is radiated, and the transformer body 111 is cooled. Is done. That is, the transformer 11 is cooled by the operation of the blower 161.

  The positional relationship between the blower 161, the radiator 15 and the discharge port 121 is such that the wind generated by the blower 161 and hitting the heat radiating plate of the radiator 15 is discharged from the discharge port 121 to the outside of the housing 12. It has been established. It is desirable that the discharge port 121 is disposed on a surface facing the center side of the roadway among the side surfaces of the housing 12. Thereby, the wind discharged from the discharge port 121 is discharged toward the center of the roadway. Since the wind discharged from the discharge port 121 is the wind that has released the heat of the transformer 11, it is at a high temperature. When wind is released toward the center of the roadway, it is unlikely that wind will be blown to passers-by on the sidewalk. For this reason, it is suppressed that a hot wind is blown to a passerby.

  A blower control unit 162 that controls the operation of the blower 161 is connected to the blower 161. The air blow control unit 162 controls on / off of the air blower 161 or controls the strength of the wind generated by the air blower 161. The blower control unit 162 controls the blower 161 according to the operation of the transformer main body 111. For example, the ventilation control unit 162 includes a temperature sensor that measures the temperature inside the transformer tank 112 or the temperature of the radiator 15 and operates the blower 161 when the temperature measured by the temperature sensor exceeds a predetermined threshold. When the temperature is equal to or lower than the threshold, the blower 161 is stopped. In addition, for example, the air blow control unit 162 increases the wind generated by the blower 161 as the temperature measured by the temperature sensor is higher. In addition, for example, the air blow control unit 162 includes a sensor that measures the load of the transformer main body 111, operates the blower 161 when the load measured by the sensor exceeds a predetermined threshold, and the load becomes equal to or less than the threshold. The blower 161 is stopped. Further, for example, the air blow control unit 162 increases the wind generated by the blower 161 as the load measured by the sensor is higher.

  The ground-mounted transformer device 1 includes a primary switch 13. The primary side switch 13 is attached to the side surface of the transformer tank 112. A high pressure bushing (not shown) penetrating the side wall of the transformer tank 112 is attached to the transformer tank 112. One end of the high pressure bushing in the transformer tank 112 is connected to the primary side of the transformer main body 111, and the other end of the high pressure bushing is connected to the primary side switch 13. The primary side switch 13 has a primary side terminal 131 to which an electric wire is connected. The primary side terminal 131 is connected to the primary side of the transformer main body 111 through the primary side switch 13 and the high voltage bushing. The primary side terminal 131 is connected to a high voltage cable 41 that is an electric wire connected to the distribution line 4. The voltage from the distribution line 4 is supplied to the primary side of the transformer body 111 through the high voltage cable 41, the primary side terminal 131, the primary side switch 13, and the high voltage bushing.

  The ground installation type transformer 1 includes a secondary switch 14. The secondary side switch 14 is attached to the side surface of the transformer tank 112. A low pressure bushing (not shown) penetrating the side wall of the transformer tank 112 is attached to the transformer tank 112. One end of the low pressure bushing in the transformer tank 112 is connected to the secondary side of the transformer body 111, and the other end of the low pressure bushing is connected to the secondary switch 14. The secondary side switch 14 has a plurality of secondary side terminals 141 to which electric wires are connected. The secondary side terminal 141 is connected to the secondary side of the transformer main body 111 via the secondary side switch 14 and the low voltage bushing. The secondary terminal 141 is connected to a low voltage cable 51 that is an electric wire connected to the lead-in wire 5.

  The transformer main body 111 steps down the voltage supplied to the primary side, and supplies the stepped down voltage from the secondary side to the low voltage cable 51 through the low voltage bushing, the secondary side switch 14 and the secondary side terminal 141. For example, a three-phase voltage of 200V or 100V is generated. The voltage after the step-down is supplied to the customer through the low-voltage cable 51 and the lead-in line 5. A power line 231 connected to the charger 2 is further connected to the secondary side terminal 141. Further, electric power may be supplied to the blower 161 and the blower control unit 162 via an electric wire (not shown) connected to the secondary terminal 141.

  The charger 2 includes a charging plug 21, a control unit 22, and a charging unit 23 that performs charging. Charging plug 21 is connected to the vehicle during charging. The charging plug 21 is connected to the charging unit 23 via the charging cable 211. The control unit 22 includes a calculation unit that performs calculation and a storage unit that stores various information and data necessary for information processing. The charging unit 23 is connected to a power line 231. The charging unit 23 is supplied with the voltage stepped down by the transformer body 111 from the ground-mounted transformer device 1 through the power line 231. The charging unit 23 supplies power to the charging plug 21 through the charging cable 211 using the supplied voltage. The charging unit 23 performs operations necessary for charging, such as voltage transformation, AC-DC conversion, and measurement of a storage amount.

  FIG. 4 is a schematic diagram illustrating a form in which the vehicle 6 is charged by the vehicle charging device 3 according to the first embodiment. The vehicle 6 stops in the vicinity of the vehicle charging device 3, and the charging plug 21 is connected to the vehicle 6. A charging cable 211 is connected to the charging plug 21. The charging unit 23 charges the vehicle to which the charging plug 21 is connected by supplying power to the charging plug 21 through the charging cable 211.

  The charger 2 includes a display unit 24, an input unit 25, a charging unit 26, and a notification unit 27. The display unit 24, the input unit 25, the billing unit 26, and the notification unit 27 are connected to the control unit 22, and the control unit 22 controls the operation of each unit. The display unit 24 displays information related to charging or information necessary for charging for charging. The display unit 24 is configured using a liquid crystal panel, an EL (Electroluminescence) panel, or the like. The input unit 25 receives information related to charging or information necessary for charging for charging from the user. The input unit 25 is configured using a numeric keypad or a touch panel. Further, the input unit 25 may have a function of performing communication with a mobile terminal device such as a smartphone or a tablet terminal used by the user and inputting information.

  The charging unit 26 performs a charging process for charging. For example, the charging unit 26 measures the charging time or the amount of charged electric power, determines an amount to be charged according to the measurement result, and performs a process of charging the determined amount. The charging unit 26 reads information from a recording medium such as a prepaid card, a credit card, an electronic money card, or a smartphone in a contact type or a non-contact type, and performs a charging process based on the read information. For example, the charging unit 26 performs a process of subtracting the amount to be charged from the amount indicating the information recorded on the recording medium. For example, the charging unit 26 communicates with a settlement server device (not shown) outside the vehicle charging device 3 via a communication network such as the Internet by wired communication or wireless communication, and makes a settlement to the server device. Let it run.

  The billing unit 26 may have a function of issuing a receipt that records the billing result. The charging unit 26 may have a function of communicating with a mobile terminal device used by the user and transmitting information indicating the result of charging to the mobile terminal device. The billing unit 26 may have a function of receiving cash, storing cash corresponding to the amount to be billed, and returning change. Further, the billing unit 26 may perform billing processing using virtual passage. Further, the charging unit 26 may determine the amount to be charged according to the charging time or the amount of power specified by the user. Further, the charging unit 26 may determine the charging time or the amount of power to be charged according to the amount designated by the user. Electricity for vehicle charging can be sold by the processing of the billing unit 26. The vehicle charging device 3 may further have a function of detecting that the vehicle 6 has stopped nearby.

  The alerting | reporting part 27 alert | reports the state of the charging device 3 for vehicles, such as charging possible or charging. For example, the alerting | reporting part 27 contains the light of three colors, green, yellow, and red. For example, when charging is possible and charging is possible, a green light is turned on, a red light is turned on during charging, and a yellow light is emitted immediately after charging when the temperature of the transformer 11 is high. Light. In addition, for example, the notification unit 27 includes a display that displays a character string representing the state of the vehicle charging device 3. For example, the notification unit 27 displays a character string “chargeable” when charging is possible, displays a character string “charging” during charging, and the temperature of the transformer 11 is high immediately after charging. In the state, the character string “Waiting” is displayed. The notification unit 27 may be provided in the ground-mounted transformer device 1. It is desirable that the notification unit 27 is disposed at a position where it can be seen from the roadway side. A user on the vehicle can check the state of the vehicle charging device 3 notified by the notification unit 27 and determine whether or not to charge the vehicle.

  FIG. 5 is a flowchart illustrating a charging process performed by the vehicle charging device 3. A vehicle stops in the vicinity of the vehicle charging device 3, and a user such as a vehicle occupant connects the charging plug 21 to the vehicle (S1). When the user operates the input unit 25 or receives information transmitted from the mobile terminal device operated by the user by the input unit 25, the input unit 25 receives an input of a charging instruction (S2). ). For example, in S <b> 2, the input unit 25 gives an instruction for charging until full charge, an instruction for charging that specifies the amount of power to be charged, an instruction for charging that specifies a charging time, or an instruction for charging that specifies an amount of charge. Accept. The control unit 22 causes the display unit 24 to display the content of the instruction received by the input unit 25. The process of S2 may be performed before the connection in S1.

  The control unit 22 causes the charging unit 23 to start charging according to the instruction received by the input unit 25 (S3). The voltage transformed by the ground-mounted transformer device 1 is supplied to the charger 2, and the charging unit 23 performs charging using the supplied voltage. For example, the charging unit 23 performs so-called rapid charging. The control unit 22 causes the notification unit 27 to notify that charging is in progress. Moreover, the control part 22 displays the information which shows the condition of charge on the display part 24 (S4). For example, the amount of power charged so far, the charging time, or the amount charged according to the amount of charged power or charging time is displayed. In addition, the control unit 22 may calculate an expected time until the end of charging, and display the calculated expected time on the display unit 24. The user grasps the state of charging by confirming the information displayed on the display unit 24.

  By performing the charging, the load on the transformer main body 111 is increased, and the temperature of the transformer 11 is increased. The blower control unit 162 causes the blower 161 to start blowing according to the operation of the transformer main body 111 (S5). For example, the air blow control unit 162 detects the load of the transformer main body 111 or the temperature of the transformer 11 and operates the blower 161 when the detected load or temperature exceeds a threshold value. The wind generated by the blower 161 hits the radiator plate of the radiator 15, the radiator 15 radiates heat, and the transformer 11 is cooled. The wind that hits the radiator plate of the radiator 15 is discharged from the discharge port 121 to the outside of the housing 12.

  The control unit 22 determines whether or not to continue charging (S6). For example, in accordance with the operation of the charging unit 23, the control unit 22 charges whether or not the battery has been fully charged, whether or not the specified amount of power has been charged, or whether the specified amount of power is charged. It is determined whether or not it has been done. For example, the control unit 22 measures the elapsed time from the start of charging and determines whether or not the specified charging time has elapsed. When a condition for terminating charging is satisfied, such as charging up to full charge, charging with a specified amount of power, charging with a specified amount of charge, or elapse of a specified charging time The control unit 22 determines that charging should be terminated. When the condition for terminating the charging is not satisfied, the control unit 22 determines that the charging should be continued.

  When the control unit 22 determines that the charging should be continued (S6: YES), the charging unit 23 continues the charging, and the control unit 22 repeats the process of S6. If it is determined that charging should be terminated (S6: NO), the control unit 22 causes the charging unit 23 to stop charging (S7). The control unit 22 causes the notification unit 27 to notify that it is immediately after charging and is waiting. In addition, the control unit 22 causes the display unit 24 to display information such as the amount of power charged at the end of charging, the charging time, or the charge amount. The user grasps the result of charging by checking the information displayed on the display unit 24. The billing unit 26 performs billing according to the amount of power charged (S8). For example, as described above, the billing unit 26 performs billing processing using a prepaid card, a credit card, cash, or the like. Further, for example, as described above, the billing unit 26 may perform a process of issuing a receipt or transmitting information indicating a billing result to the mobile terminal device used by the user. The control unit 22 may perform a process of locking the connection to the charging plug 21 and causing the charging plug 21 to release the lock when charging is completed. The billing process of S8 may be executed before charging.

  When the charging is stopped, the load on the transformer main body 111 is lowered, and the temperature of the transformer 11 is lowered. The blower control unit 162 causes the blower 161 to stop blowing in response to a decrease in load or a decrease in temperature (S9). For example, the blower control unit 162 stops the operation of the blower 161 when the detected load of the transformer main body 111 or the temperature of the transformer 11 is equal to or lower than the threshold value. The control unit 22 causes the notification unit 27 to notify that charging is possible. The charging device 3 for vehicles complete | finishes the process of charge above.

  As described above in detail, in the present embodiment, the vehicle charging device 3 includes the ground-mounted transformer device 1 and the charger 2 disposed in the vicinity of the ground-mounted transformer device 1. The charger 2 charges the vehicle using the voltage transformed by the ground-mounted transformer 1. When quick charging is performed, power of several tens of kW is required, but the ground-mounted transformer 1 can sufficiently supply power necessary for rapid charging, and thus stable charging is possible. The vehicle charging device 3 can be installed in any place where the ground-mounted transformer device 1 is installed. For this reason, it is possible to install the charging device 3 for vehicles in many places. For example, it can be installed on the side of the roadway at intervals of several hundred meters. Therefore, the vehicle charging device 3 can be greatly increased. By increasing the number of vehicle charging devices 3, it becomes possible to promote the spread of vehicles equipped with batteries that require charging.

  In addition, since the ground-mounted transformer device 1 is often installed on the side of the roadway, the vehicle charging device 3 can be installed on the side of the roadway. By installing the vehicle charging device 3 on the side of the roadway, it becomes easy for the vehicle to stop near the vehicle charging device 3, and charging of the vehicle using the vehicle charging device 3 is facilitated.

  In the present embodiment, the transformer 11 is cooled by the blower 161 according to the operation of the transformer body 111. When charging is performed, the load on the transformer main body 111 is increased, and the temperature of the transformer 11 is increased. If the rise in temperature is neglected, the temperature of the housing 12 also rises, and there is a possibility that a disaster may occur such that a passerby who contacts the housing 12 gets burned. Moreover, there exists a possibility that the transformer 11 may deteriorate with the rise in temperature. In this embodiment, since the transformer 11 is cooled by the blower 161, an increase in the temperature of the transformer 11 is suppressed. For this reason, generation | occurrence | production of the disaster resulting from the rise in temperature and deterioration of the transformer 11 are suppressed.

(Embodiment 2)
FIG. 6 is a block diagram illustrating an internal configuration of the vehicle charging device 3 according to the second embodiment. In addition to the power line 231, a power line 232 is connected to the charging unit 23. The power line 232 is connected to the secondary switch 14. The charging unit 23 receives the power discharged from the battery included in the vehicle connected to the charging plug 21 through the charging plug 21 and the charging cable 211, and supplies the received power to the secondary switch 14 through the power line 232. It has a function. The secondary switch 14 has a function of supplying the power supplied from the charging unit 23 to the low voltage cable 51. The charging unit 23, the power line 232, and the secondary side switch 14 correspond to a power receiving unit. The power line 231 and the power line 232 may be the same electric wire. Further, the vehicle charging device 3 may include a circuit for receiving electric power from the vehicle, separately from the charging unit 23. Configurations and functions of other parts of the vehicle charging device 3 are the same as those in the first embodiment.

  In the present embodiment, the vehicle charging device 3 can supply electric power from the vehicle to the low voltage cable 51. That is, the electric power from the vehicle can be supplied to the customer through the low voltage cable 51 and the lead-in line 5. For example, when the supply of power through the distribution line 4 is stopped, the power can be supplied from the vehicle to the consumer. That is, it is possible to use the power charged in the vehicle at the time of a power failure.

  In the first and second embodiments, the charger 2 includes a single charging plug 21, but the vehicle charging device 3 includes a charger 2 including a plurality of charging plugs 21. May be. The vehicle charging device 3 may be configured to charge a plurality of vehicles at the same time using a plurality of charging plugs 21.

(Embodiment 3)
FIG. 7 is a perspective view schematically showing the appearance of the vehicle charging device 3 according to the third embodiment. FIG. 8 is a block diagram illustrating an internal configuration of the vehicle charging device 3 according to the third embodiment. The charger 2 includes a power transmission unit 28 that transmits power to the outside without contact. The power transmission unit 28 is connected to the charging unit 23 via the charging cable 281. The power transmission unit 28 has a function of transmitting power to the vehicle in a non-contact manner by a method such as an electromagnetic induction method. Charging cable 281 is buried underground. The power transmission unit 28 is embedded under the ground where the vehicle stops in order to perform charging using the vehicle charging device 3. For example, the power transmission unit 28 is disposed below the roadway in the vicinity of the vehicle charging device 3. Since the power transmission unit 28 is embedded, the vehicle on the roadway can be easily brought close to the power transmission unit 28, and the vehicle can be easily charged. The power transmission unit 28 may be disposed on the ground. The charging unit 23 supplies power to the power transmission unit 28 through the charging cable 281, and the power transmission unit 28 transmits the supplied power to the vehicle in a contactless manner. As a result, the vehicle is charged in a non-contact manner. Configurations and functions of other parts of the vehicle charging device 3 are the same as those in the first or second embodiment.

  Also in the present embodiment, the vehicle charging device 3 performs the same processing as in the first embodiment. That is, the vehicle charging device 3 executes the same process as the process shown in FIG. When the vehicle stops at a position where charging by the vehicle charging device 3 is possible, the connection of S1 is performed. For example, the vehicle has a power receiving unit that receives power, and the connection of S1 is performed when the vehicle stops at a position where the power receiving unit and the power transmission unit 28 face each other. Charging is performed with the vehicle stopped at a position where charging is possible.

  In the present embodiment, the vehicle charging device 3 charges the vehicle in a non-contact manner. The vehicle can be charged only by stopping the vehicle in the vicinity of the vehicle charging device 3. Since it is not necessary for the user to connect the charging plug 21 to the vehicle, charging is performed more easily. In addition, by performing communication between the mobile terminal device used by the user and the charger 2, the user can perform an operation necessary for charging while in the vehicle. Moreover, the form which can charge with respect to the vehicle which is waiting for a signal may be sufficient as the charging device 3 for vehicles. While the vehicle is waiting for a signal, communication between the portable terminal device used by the user or the communication device provided in the vehicle and the charger 2 allows the information necessary for charging to be stored in the charger 2. The charger 2 uses the power transmission unit 28 to charge the vehicle in a non-contact manner.

  In the vehicle charging device 3, the charger 2 may include both the charging plug 21 and the power transmission unit 28. In the first to third embodiments, the vehicle charging device 3 includes the single charger 2. However, the vehicle charging device 3 includes a plurality of vehicle-mounted charging devices 1. The form with which the charger 2 of this was connected may be sufficient. In the first to third embodiments, the vehicle charging device 3 is installed on the side of the roadway. However, the vehicle charging device 3 may be installed in other places. For example, the vehicle charging device 3 may be installed in a commercial facility, a house, or a parking lot.

(Embodiment 4)
In Embodiment 4, the vehicle charging device 3 using the existing ground installation type transformer 1 is shown. FIG. 9 is a perspective view schematically showing the appearance of the vehicle charging device 3 according to the fourth embodiment. A charger 2 is installed in the vicinity of the existing ground-type transformer 1. A through hole 123 is provided in the housing 12 of the ground-mounted transformer 1. The power line 231 is caused to enter the inside of the housing 12 through the through hole 123, and the power line 231 is connected to the secondary side terminal 141. The power line 231 is connected to the charging unit 23. In this way, the vehicle charging device 3 is configured. The through hole 123 may be closed with a lid, and in this case, the lid is removed when the vehicle charging device 3 is configured. Note that the door 122 of the ground-mounted transformer device 1 may be opened and the power line 231 may enter the inside of the housing 12. Further, a part of the housing 12 may be removed, and the power line 231 may enter the inside of the housing 12 from the removed portion. The position where the charger 2 is installed is a position where the power line 231 reaches the ground-mounted transformer device 1. For example, the charger 2 may be installed in contact with the ground-mounted transformer device 1.

  The existing ground-mounted transformer device 1 often does not include the blower 161 for cooling the transformer 11. The vehicle charging device 3 may have a form in which the charger 2 includes the blower 161. FIG. 10 is a block diagram illustrating another configuration example of the interior of the vehicle charging device 3 according to the fourth embodiment. A part of the side plate constituting the housing 12 is removed, and an opening 124 is provided on the side surface of the ground-mounted transformer 1. The charger 2 is installed in close contact with the ground-type transformer 1 so as to close the opening 124. The power line 231 is caused to enter the inside of the housing 12 through the opening 124, and the power line 231 is connected to the secondary side terminal 141.

  The charger 2 includes a blower 161 and a blower control unit 162. As in the first to third embodiments, the air blow control unit 162 controls the blower 161 according to the operation of the transformer main body 111. For example, the blower control unit 162 includes a temperature sensor that measures the temperature inside the vehicle charging device 3 or the temperature of the radiator 15, and operates the blower 161 when the temperature measured by the temperature sensor is high. When the air pressure is low, the blower 161 is stopped. When the blower 161 is operated, the wind from the blower 161 hits the heat dissipation plate of the radiator 15 and the transformer body 111 is cooled. That is, the transformer 11 is cooled. The power for operating the blower 161 and the blower control unit 162 may be supplied from the charging unit 23. Even if the existing ground-mounted transformer 1 does not include a blower by itself, the blower 161 provided in the charger 2 cools the transformer 11 and suppresses an increase in the temperature of the transformer 11. . The configuration and functions of other parts of the vehicle charging device 3 are the same as those in any one of the first to third embodiments.

  In the present embodiment, the vehicle charging device 3 can be configured by connecting the charger 2 to the existing ground-mounted transformer device 1. For this reason, the charging device 3 for vehicles can be comprised using the ground installation type transformer 1 already installed. Therefore, the vehicle charging device 3 can be greatly increased.

(Embodiment 5)
FIG. 11 is a schematic diagram illustrating an example of a parking lot provided with the vehicle charging device 3 according to the fifth embodiment. The parking lot shown in FIG. 11 is a so-called coin parking where charging is performed according to the parking time. The vehicle charging device 3 includes one ground-mounted transformer device 1 and a plurality of chargers 2. The ground-mounted transformer device 1 is installed in a parking lot, and a charger 2 is installed in the vicinity of each of a plurality of parking spaces. The plurality of chargers 2 are connected to the ground-mounted transformer device 1. The configuration and function of the vehicle charging device 3 are the same as those in any one of the first to fourth embodiments. Each charger 2 is supplied with a voltage from the ground-mounted transformer device 1 and can charge the vehicle.

  In this embodiment, the charging device 3 for vehicles is installed in the parking lot. A vehicle parked in the parking lot can be charged using the vehicle charging device 3. Since charging is possible during parking, the vehicle can be charged efficiently. Since the vehicle charging device 3 can be installed in the parking lot, the vehicle charging device 3 can be greatly expanded. In addition, the charger 2 may be installed only in the vicinity of some parking spaces in the parking lot. In addition, a plurality of ground-mounted transformer devices 1 may be installed in the parking lot, or only one vehicle charging device 3 may be connected to one ground-mounted transformer device 1.

  The present invention is not limited to the contents of the above-described embodiments, and various modifications can be made within the scope of the claims. That is, embodiments obtained by combining technical means appropriately changed within the scope of the claims are also included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Ground installation type transformer 11 Transformer 111 Transformer main body 112 Transformer tank 12 Case 121 Outlet 122 Door 13 Primary side switch 131 Primary side terminal 14 Secondary side switch 141 Secondary side terminal 15 Radiator 161 Blower 162 Blower Control Unit 2 Charger 21 Charging Plug 22 Control Unit 23 Charging Unit 231, 232 Power Line 24 Display Unit 25 Input Unit 26 Charging Unit 28 Power Transfer Unit 3 Vehicle Charging Device 4 Distribution Line 5 Lead-In Line 6 Vehicle

Claims (11)

A ground-mounted transformer that has a transformer, is connected to an external distribution line, steps down the voltage supplied from the distribution line, and supplies the voltage after step-down to the outside;
A vehicle charging device comprising: a charger that is connected to the ground-mounted transformer and charges the vehicle using a voltage after step-down. A blower for cooling the transformer;
The vehicle charging device according to claim 1, further comprising: a ventilation control unit that controls the operation of the blower according to the operation of the transformer. The ground-mounted transformer is installed beside the roadway,
The charging device for vehicles according to claim 2, wherein the ground-mounted transformer device further includes a discharge port for discharging the air blown by the blower toward the center of the roadway. A power line for supplying power from the ground-mounted transformer to the charger;
The ground-mounted transformer device further includes a secondary terminal connected to the secondary side of the transformer,
The charging device for a vehicle according to any one of claims 1 to 3, wherein the power line is connected to the secondary terminal. The charger is
A billing unit that performs billing processing according to charging;
The vehicle charging device according to claim 1, further comprising: a display unit that displays the amount of charged electric power, a charging time, or a charge amount. The vehicle charger according to any one of claims 1 to 5, wherein the charger further includes a power transmission unit that transmits power to be charged to the vehicle in a contactless manner. The vehicle charging device according to claim 6, wherein the power transmission unit is embedded in a road. The vehicle charging device according to claim 1, further comprising a power receiving unit that receives power from the vehicle and supplies the received power to the outside. Install a charger to charge the vehicle near the ground-mounted transformer,
A power line for supplying power to the charger is allowed to enter the ground-mounted transformer,
The charger connection method, wherein the power line is connected to a secondary terminal of the ground-mounted transformer. In a charger that charges a vehicle,
A charging unit connected to the ground-mounted transformer and charging the vehicle using the voltage stepped down by the ground-mounted transformer;
A battery charger comprising: a blower for cooling the inside of the ground-mounted transformer. In parking lots where vehicles can be parked and charged according to the parking time,
A parking lot comprising the vehicular charging device according to any one of claims 1 to 8.

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