JP2009195092A - Charging system for vehicles - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a charging system for a vehicle which endures actual use and to promote popularization of electric vehicles. <P>SOLUTION: A 200-volt voltage from a single-phase three-wire power line can be applied to a charging connection portion for the vehicle so as to be charged at high speed. Unless normal connection to a connection portion, normal output impedance of the connection portion, normal shape of a connection portion plug and the like, uncharged vehicle connection, connected vehicle identification, and connected vehicle authentication are detected, electrification and illegal use of electricity are prevented by prohibiting output voltage application to the charging connection portion. Whether the output voltage application may be performed or not is automatically detected by means of the connection of the vehicle or arrival at midnight discount time or the like. As this detection is conducted by power line communication, communication is made possible even while charging voltage application is prohibited. Holding a power supply starting condition is automatically decided according to the presence and absence of traditional contract by time zone. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a charging system for a vehicle.

Electric vehicles and plug-in hybrid vehicles have entered into a practical application study stage, and various charging systems for these vehicles have been studied by Patent Document 1, Patent Document 2, and the like.
Japanese Patent Laid-Open No. 7-4095 Japanese Patent Laid-Open No. 10-262304

However, many problems still remain in providing a practical charging system for popularizing electric vehicles and plug-in hybrid vehicles.

In view of the above, an object of the present invention is to provide a charging system for a vehicle that can withstand actual use, and to promote the spread of vehicles that use electricity.

In order to solve the above problems, the present invention provides a power supply unit that outputs power to a vehicle having a battery, a power supply opening / closing unit that determines whether power is supplied to the power supply unit, and a vehicle that is correctly connected to the power supply unit. Provided is a vehicle charging system including a control unit that controls a power supply opening / closing unit so that power supply to the power supply unit is prohibited unless detected. For the spread of vehicles that use electricity, quick charging and easy charging are necessary, but on the other hand, there is a contradiction between the device for performing such charging and the contingency that accompanies it. . The above feature of the present invention adjusts this relationship by prohibiting power feeding to the power feeding unit unless it is detected that the vehicle is correctly connected to the power feeding unit.

According to a specific feature of the present invention, the power supply opening / closing unit is supplied with power from a single-phase three-wire power line having a first outer line, a second outer line, and a neutral line, and between the first outer line and the second outer line. To supply high voltage power to the power supply unit. This makes it possible to charge a vehicle at a high voltage of 200 volts or the like using a single-phase three-wire power line that is widely used in the home, and appropriately manage a 200-volt power source that is at risk of electrocution. be able to. According to a more specific feature of the invention, the control unit may be configured to receive a supply of electric power at a low voltage, such as a normal 100 volts, between either the first outer line or the second outer line and the neutral line. it can.

According to another specific feature of the present invention, the control unit controls the power supply opening / closing unit to prohibit power supply to the power supply unit unless it detects that the connection through the power supply unit is normal. As a result, it is possible to prevent a voltage from being accidentally applied to the power feeding unit. According to another specific feature of the present invention, the control unit controls the power supply opening / closing unit to prohibit power supply to the power supply unit unless it detects that the output impedance from the power supply unit is normal. As a result, it is possible to prevent the power supply unit from supplying power to an inappropriate device that is not planned.

According to another specific feature of the present invention, the control unit controls the power supply opening / closing unit to prohibit power supply to the power supply unit unless it detects that a connection part having a predetermined shape is connected to the power supply unit. . Also with this feature, it is possible to prevent power supply from being performed on an inappropriate device that is not planned. According to another specific feature of the present invention, the control unit controls the power supply opening / closing unit to prohibit power supply to the power supply unit unless it detects that an uncharged vehicle is connected to the power supply unit. To do. This feature can also prevent an inadvertent application of voltage to the power feeding unit.

According to another specific feature of the present invention, the control unit controls the power supply opening / closing unit to prohibit power supply to the power supply unit unless a vehicle connected to the power supply unit can be specified. As a result, it is possible to prevent a voltage from being inadvertently applied to the power supply unit and to prevent theft of electricity even when the garage is outdoors. According to another specific feature of the present invention, the control unit controls the power supply opening / closing unit to prohibit power supply to the power supply unit unless a vehicle connected to the power supply unit can be authenticated. As a result, TEPCO can be prevented even when the garage is outdoors.

According to another specific feature of the present invention, the control unit automatically starts detecting whether or not the vehicle is correctly connected to the power feeding unit by connecting the vehicle to the power feeding unit. This facilitates power feeding and, in combination with the characteristics already described, can contribute to the spread of vehicles that use electricity. According to another specific feature of the present invention, the control unit automatically starts detecting whether or not the vehicle is correctly connected to the power supply unit when the charging start time for the power supply unit arrives. This feature also facilitates power supply, and in combination with the features already described, can contribute to the spread of vehicles that use electricity.

According to another specific feature of the present invention, it is detected whether or not the vehicle is correctly connected to the power feeding unit by power line communication via the power feeding unit. This facilitates communication for power supply and procedures related to power supply, and can contribute to the popularization of vehicles using electricity in combination with the characteristics already described. According to the more specific feature of the present invention, the open / close unit allows a communication signal to be superimposed for power line communication to be transmitted via the power supply unit regardless of whether or not power is supplied. As a result, power supply control can be performed without hindering power line communication.

According to another specific feature of the present invention, the control unit detects whether or not the vehicle is correctly connected to the power feeding unit by wireless communication with the vehicle. Even with such a feature, it is possible to easily perform power supply and communication for a procedure related to power supply.

According to another aspect of the present invention, a power feeding unit that outputs power to a vehicle having a battery, a detection unit that detects a power feeding start condition from the power feeding unit to the vehicle, and whether or not power is supplied to the power feeding unit. When there is no power supply opening / closing unit to be determined and a traditional contract by time zone, power supply is started by detecting the power supply start condition by the detection unit, and when there is a traditional contract by time zone, the detection unit detects the power supply start condition Even so, there is provided a charging system for a vehicle having a control unit for a power supply opening / closing unit that suspends the start of power supply until the corresponding time zone comes. This makes it possible to take advantage of the economic advantages of a vehicle that uses electricity without bothering with procedures and operations.

FIG. 1 is a block diagram showing an example of a vehicle charging system according to an embodiment of the present invention. The garage 2 can accommodate a plug-in hybrid type vehicle 4 and includes an outlet unit 6. The connecting portion 8 of the outlet unit 6 and the connecting portion 10 for charging of the vehicle 4 can be connected by a charging cable 12. The charging cable 12 is normally stored in the vehicle 4 and is taken out during charging and connected as shown in FIG.

As described above, the vehicle 4 is a plug-in hybrid type, and the traveling mechanism 14 consumes the gasoline in the fuel tank 16 and rotates, and the motor 22 that consumes power from the secondary battery 20 and rotates. It can be driven by either of these. The secondary battery 20 is charged by surplus power of the engine 18 and can be charged by electric power supplied from the outside of the vehicle 4 via the charging connection portion 10.

The charging cable 12 is a power line incorporated in a PLC (Power Line Communications) system as will be described in detail later. That is, the charging cable 12 is a power line and also serves as a communication path for a digital communication signal synthesized with the charging cable 12. The PLC demultiplexing / combining unit 24 supplies the power received by the charging connection unit 10 via the charging cable 12 to the secondary battery 20, demultiplexes the digital communication signal, and transmits the demultiplexed signal to the vehicle control unit 26. On the other hand, the PLC demultiplexing / synthesizing unit 24 synthesizes a command from the vehicle control unit 26, data stored in the storage unit 28, and the like into the power line and outputs the power line to the outside of the vehicle 4. The storage unit 28 stores, for example, data for authenticating the vehicle 4 from the outside. The vehicle control unit 26 further controls the display unit 30 and generates an infrared operation signal 36 from the wireless communication unit 34 in response to a manual operation at the operation unit 32. This infrared operation signal is a signal for opening and closing a garage door, for example. In addition, the vehicle control unit 26 monitors the charging status of the secondary battery 20.

The outlet unit 6 is supplied with power from the power line 38 incorporated in the PLC system, and is connected to the connection unit 8 via the power supply opening / closing unit 40. The power supply opening / closing unit 40 has a meter and the like with a function of cutting off the power supply to the connection unit 8 when unnecessary and inconvenient, and demultiplexes a signal for cutting off the power supply and combines the information of the meter with the power line. A PLC demultiplexer / synthesizer 42 is provided. Details thereof will be described later. The outlet unit 6 further includes a hand display unit 44 and a hand illumination unit 46. The hand display unit 44 displays the charging status and the like at the hand of the outlet unit 6 based on the digital communication signal demultiplexed by the PLC demultiplexing unit 48. The hand illumination unit 46 illuminates the connection unit 8 and the hand display unit 44 when the hand of the outlet unit 6 is dark based on the digital communication signal demultiplexed by the PLC demultiplexing unit 50.

The garage 2 further includes a garage illumination unit 52 and a garage door mechanism 54 connected to the power line 38, and these are controlled by a garage control unit 56 that is also connected to the power line 38. The garage control unit 56 has a PLC demultiplexing / combining unit 58, and synthesizes control signals to the garage lighting unit 52, the garage door mechanism 54, and the like on the power line 38 and outputs the power signal 38. These control signals are demultiplexed by the PLC demultiplexing unit 60 or the PLC demultiplexing unit 62 to control the garage illumination unit 52 or the garage door mechanism 54. For example, when an infrared operation signal 36 generated based on the garage door opening operation of the operation unit 32 is received by the wireless communication unit 64, the garage door is controlled by the PLC demultiplexing synthesis unit 58 controlled by the vehicle control unit 56. The opening control signal is combined with the power line 38 and is demultiplexed by the PLC demultiplexing unit 62, whereby the garage door mechanism 54 is driven to open the garage door. The infrared signal 36 may be automatically generated when the vehicle 4 approaches the garage 2. Similarly, when an infrared operation signal 36 generated by a lighting operation of the garage lighting of the operation unit 32 or automatic approach detection is received by the communication unit 64, the garage is operated by the PLC demultiplexing unit 58 controlled by the vehicle control unit 56. The door opening control signal is combined with the power line 38, and is demultiplexed by the PLC demultiplexing unit 60, so that the garage illumination unit 52 for illuminating the entire garage is turned on.

In the above embodiment, the wireless communication unit 34 and the communication unit 64 are configured to have an infrared communication function, but both can be configured as a wireless LAN communication unit. In this case, wireless communication can be performed bidirectionally and at high speed by radio waves in place of the infrared operation signal 36, and various information exchanges can be performed between the vehicle control unit 26 and a control computer in a residential system 66 described later. it can. Further, when the communication unit 34 is configured as a wireless LAN communication unit, direct communication between the communication unit 34 and the residential system 66 is possible if the control computer in the residential system 66 can support wireless LAN communication. Various information exchanges can also be performed. In this case, the authentication data of the vehicle 4 stored in the storage unit 28 can be directly transmitted to the dwelling system 66 not only via the charging cable 12 but also via the wireless LAN.

When the garage 2 and the vehicle 4 are connected by the charging cable 12, the operation signal from the operation unit 32 or the like is synthesized with the power line by the PLC demultiplexing / combining unit 24, thereby the garage from the charging cable 12 via the power line 38. The illumination unit 52 or the garage door mechanism 54 can be controlled. Further, instead of the direct control from the vehicle control unit 26 as described above, various digital signals on the power line 38 are first demultiplexed by the PLC demultiplexing synthesis unit 58 and processed by the vehicle control unit 56. A dedicated control signal based on the result may be combined with the power line 38 by the PLC demultiplexing combining unit 58 to control the garage lighting unit 52, the garage door mechanism 54, and the like. In this case, the digital signal to be demultiplexed by the PLC demultiplexing / synthesizing unit 58 may be information not only from the vehicle 4 but also from the dwelling system 66 to which the garage 2 is attached.

Electric power is drawn into the distribution board 72 from the lead-in line 68 via the power selling / buying meter 70, and the PLC
The power is supplied to the power line 38 in the residence through the demultiplexing / combining unit 74. An optical cable 76 is connected to the PLC demultiplexing / combining unit 74. A digital communication signal transmitted from the optical cable 76 is combined with the power line 38, and a digital communication signal flowing through the power line 38 in the residence is demultiplexed. It is transmitted from the optical cable 76 to the outside. The solar system 78 includes a solar cell 80, and generated electric power is supplied to the distribution board 72 via the inverter 82. When the power supplied from the solar system 78 is less than the power consumed in the house, the power sale / buy meter 70 is in a power purchase state, and conversely, the power supplied from the solar system 78 is consumed in the house. When it is more than the electric power, the power sale / power purchase meter 70 is in a power sale state.

The dwelling system 66 has a control computer, which will be described later, and controls the interior of the dwelling and also has a PLC demultiplexing / synthesizing unit 84 necessary for this control. The power trading information from the power selling / buying meter 70 is transmitted to the dwelling system 66 through the LAN cable 86 and processed by the control computer.

FIG. 2 is a block diagram illustrating details of wiring relations in the embodiment of the vehicle charging system in FIG. Since the configuration itself is exactly the same as in FIG. 1, the corresponding parts are denoted by the same reference numerals, and the description thereof is omitted unless necessary. In FIG. 2, a part of the configuration shown in FIG. 1 is omitted. For example, in FIG. 2, the detailed configuration such as the power supply opening / closing unit 40 is not illustrated, and the vehicle 4 is not illustrated at all. However, these are merely omitted for the sake of simplicity, and since both have the same configuration, the embodiment should be understood with reference to FIGS.

As is clear from FIG. 2, the power line in the embodiment is a single-phase three-wire power line. Specifically, the lead-in line 68 illustrated in FIG. 1 includes a first outer line 102, a second outer line 104, and a neutral line 106 as illustrated in FIG. The neutral wire 106 is grounded by a utility pole or the like before being drawn into the home. Correspondingly, the power line 38 wired in the home from the distribution board 72 in FIG. 1 is also composed of the first outer line 108, the second outer line 110, and the neutral line 112 as shown in FIG. The first outer wire 102 and the second outer wire 104 are each supplied with an AC voltage of 100 volts in reverse phase with respect to the neutral wire 106. As a result, an AC voltage of 100 volts is obtained from the outlet taken between the first outer line 108 and the neutral line 112 or between the second outer line 110 and the neutral line 112, and the first outer line 108 and the first An AC current of 200 volts is obtained from an outlet taken from the two outer wires 110.

The PLC demultiplexing unit 74 combines communication signals received from the optical cable 76 between the first outer line 108 and the neutral line 112 and between the second outer line 110 and the neutral line 112, and Any one of the communication signal demultiplexed from between the neutral lines 112 and the communication signal demultiplexed from between the second outer line 110 and the neutral line 112 can be transmitted from the optical cable 76. Further, between the first outer line 108 and the second outer line 110, there is a relay coupler that cuts an AC band of about 50 Hz or 60 Hz and allows high-frequency communication signals to pass. The communication signal between the external line 108 and the neutral line 112 and the communication signal between the second external line 110 and the neutral line 112 are relayed. Details of the relay of the PLC communication signal between the first outside line 108 and the second outside line 110 are described in Japanese Patent Application No. 2007-298696 by the same applicant. As a result, a PLC-compatible device using an outlet taken between the first external line 108 and the neutral wire 112, a PLC-compatible device using an outlet taken between the second external line 110 and the neutral wire 112, and Any PLC-compatible device using an outlet taken from the first external line 108 and the second external line 110 can perform PLC communication with each other and can communicate with the outside through the optical cable 76.

The PLC demultiplexing / synthesizing unit 84 of the residential system 66 is connected to an outlet taken from the second external line 110 and the neutral line 112, and supplies an alternating current of 100 volts to the power source of the control computer 114. The PLC demultiplexing / synthesizing unit 84 synthesizes the communication signal output from the control computer 114 between the second external line 110 and the neutral line 112 and demultiplexes between the second external line 110 and the neutral line 112. The transmitted communication signal is input to the control computer 114. The PLC demultiplexing / synthesizing unit 84 is taken from the first outer line 108 and the neutral line 112 instead of connecting to the outlet taken from the second outer line 110 and the neutral line 112 as shown in FIG. It works exactly the same when connected to an electrical outlet.

In the garage 2, three lines of the first outer line 108, the second outer line 110 and the neutral line 112 are wired, and these are also wired to the outlet unit 6 as they are. Inside the outlet unit 6, the power supply opening / closing unit 40 is connected to the first outer line 108 and the second outer line 110, and supplies an AC current of 200 volts to the connection unit 8. As a result, the vehicle 4 can be rapidly charged. The hand display unit 44 is connected to an outlet taken between the first external line 108 and the neutral line 112, and the hand illumination unit 46 is connected to an outlet taken between the second external line 110 and the neutral line 112. It is connected to the.

Further, the garage lighting unit 52 and the garage door mechanism 54 in the garage 2 are connected to an outlet taken from between the first outer line 108 and the neutral line 112, and the garage control unit 26 is connected to the second outer line 110 and the neutral line. 112 is connected to an outlet taken from between 112. Between the first outer line 108 and the second outer line 110 of the outlet unit 6, a relay coupler 116 that cuts the AC power band and allows high-frequency communication signals to pass therethrough is provided in the garage 2. The communication signal between 108 and the neutral line 112 and the communication signal between the second outer line 110 and the neutral line 112 are relayed. Such relaying is also performed in the PLC demultiplexing / combining unit 74 in the vicinity of the distribution board 72 as described above, but in order to cope with the attenuation of the communication signal in the portion where the power line length from the relaying unit is long. In the garage 2 as well, the communication signal between the first outside line 108 and the second outside line 110 is relayed, and the PLC communication using the first outside line 108 and the neutral line 112 and the second outside line 110 and the neutral line 112 are used. Relay PLC communication. Note that PLC communication with the vehicle 4 via the connection unit 8 is performed using both the first outer line 108 and the second outer line 110, and the communication signal is demultiplexed between these two lines and the ground. Synthesis is performed.

FIG. 3 is a block diagram showing an embodiment of the vehicle charging system in FIG. 1 in the same manner as in FIG. 2, but in order to explain the details of the control by the control computer 114, in particular the power supply in the outlet unit 6 of the garage 2 The details of the opening / closing part 40 and the dwelling system 66 are illustrated. 3 is exactly the same as that of FIG. 1, the corresponding parts are denoted by the same reference numerals, and the description thereof is omitted unless necessary. In FIG. 3, the configuration illustrated in FIG. 1 or 2 is partially omitted, but these are merely omitted for the sake of simplicity, and the embodiments are the same. The configuration should be understood with reference to FIGS.

In the power supply opening / closing unit 40, a charge meter 202 and a power supply switch 204 are provided between the PLC demultiplexing / combining unit 42 and the connection unit 8. The charge meter 202 monitors the power consumed to charge the vehicle 4 by detecting the current flowing from the power line 38 to the connecting portion 8. The power monitoring result is sent to the control unit 206, and this is combined with the power line 38 by the PLC demultiplexing / combining unit 42, and is transmitted to the control computer 114. In addition, the charge meter 202 detects not only the normal charge monitor but also the output impedance of the connecting portion 8 by current detection. When an abnormal output impedance is detected when an unscheduled device other than the vehicle 4 is connected to the connection unit 8, this is reported to the control computer 114 via the control unit 206 and the PLC demultiplexing / combining unit 42.

The power supply switch 204 is for cutting off the power supply when receiving an instruction from the control unit 206 that power should not be supplied to the connection unit 8. An instruction from the control unit 206 is determined by the control computer 114. For example, when the output impedance is abnormal as described above or when the vehicle 4 cannot be authenticated as described later, the power supply is cut off. As a result, danger is prevented so that the voltage of 200 volts coming to the connection part is not inadvertently output to the outside, and theft and the like are also prevented.

The control computer 114 is connected to the display unit 208 and the speaker 210, and notifies the dwelling of various information related to the dwelling system 66 by display or announcement. Further, the display unit 208 and the speaker 210 are controlled by the control computer 114, and may receive remote information in the garage 2 such as charging status and impedance abnormality or vehicle authentication failure in the residence by a report from the control unit 206. To be able to know.

FIG. 4 is a block diagram showing an embodiment of the vehicle charging system in FIG. 1 in the same manner as FIGS. 2 and 3, but in order to explain the details of the power supply control, in particular, the power supply switch 204 in the power supply opening and closing unit 40. And the like are shown in detail. 2 and FIG. 3 are the same as those in FIG. 1, the corresponding parts are denoted by the same reference numerals, and description thereof is omitted unless necessary. In FIG. 4, the illustration of the configuration other than the outlet unit 6 is omitted for the sake of simplicity. However, since the embodiments are the same, the configuration should be understood with reference to FIGS.

As is clear from FIG. 4, the power supply switch 204 in the embodiment of the present invention includes an IGBT (Insulated Gate Bipolar Transistor) 302, and is connected between the charge meter 202 and the connection unit 8 based on a control signal from the control unit 206. Is switched on or off. A high-pass filter 304 is connected in parallel to the IGBT 302, and allows high-frequency digital signals in PLC communication to pass regardless of whether the IGBT 302 is conductive or non-conductive. Since the high-pass filter 304 cuts the AC band of about 50 Hz or 60 Hz, the IGBT 302 exclusively determines whether to supply power. The neutral wire 112 is grounded 306 as shown in the outlet unit 6. The neutral wire is grounded by a utility pole or the like before the neutral wire 106 is drawn into the home, but is also performed by the outlet unit 6 for safety. The PLC demultiplexing / synthesizing unit 42 is connected to the ground 306, and the demultiplexing / combining of the communication signal is performed between both the first outer line 108 and the second outer line 110 by using both the first outer line 108 and the second outer line 110. It is supposed to be.

As apparent from FIG. 4, the connection portion 8 is further connected to mechanically detect the shape of the connection plug of the charging cable 12 scheduled to be connected to the connection portion 8 and transmit this to the control portion. Therefore, even when the electrical connection to the connection unit 8 is performed, if the connection unit mechanical sensor 308 cannot detect that the shape of the connection plug is predetermined, To that effect, the control unit 206 notifies the control computer 114 via the PLC demultiplexing / combining unit 42. In response to this, the control computer 114 sends a signal to turn off the IGBT 302 to the control unit 206 to prevent the voltage of 200 volts coming to the connection unit from being output to a device that is not rated, and to prevent theft. Also prevent such.

FIG. 5 is a flowchart showing the basic operation of the control computer 114. This flow starts when the charging cable 12 is connected to the connection unit 8 or when a charging start time that becomes a late night charge comes when the charging cable 12 is connected. When the flow starts, the vehicle 4 is requested to send an ID for authentication to the vehicle in step S2. In step S4, it is checked whether or not an ID has been received, and if reception is detected, the process proceeds to step S6 to check whether or not the ID matches that already registered. The request and transmission of the ID and password in the above steps are performed by wire through the PLC system, but may be performed wirelessly through the communication units 34 and 64.

When the ID match is detected in step S6, the process proceeds to step S8, and it is checked whether or not the flow is started by an interruption due to the arrival of the charge start time in a state where the charging cable 12 is connected. If it is not detected in step S12 that it is a time-arrival interrupt, it means that the flow has started due to the connection of the charging cable 12, so that the process proceeds to step S14, and the electric lamp contract according to time zone including the application of a late-night discount fee, etc. Check if has been done.

If it is detected in step S14 that a traditional contract by time zone is being performed, the process proceeds to step S16, and whether or not an emergency charging operation for immediately starting charging is performed regardless of whether it is a midnight time zone or not is checked. To do. If no emergency charging operation is detected in step S16, the process proceeds to step S18 to check whether it is a discount time zone such as a late night charge, and if applicable, the process proceeds to step S20 to execute a power supply process. Then, when the power supply process is completed, the flow ends. Details of the power supply process will be described later.

On the other hand, when it is detected in step S12 that the flow has started due to the time-arrival interrupt, or when it is not detected in step S14 that the time-based traditional contract is being performed, or in step S16, the emergency charging operation is performed. If detected, the power supply process of step S20 is immediately started. If it is not detected in step S18 that it is a discount time zone, the process proceeds to step S22, and time monitoring for detecting the arrival of the discount time zone is started. Further, in step S24, a process for enabling an interrupt for starting the flow of FIG. 5 by time arrival detection is performed, and the flow is terminated. As a result, the control computer 114 enters a standby state for the arrival of time. If no ID receipt is detected in step S4, or if no ID match is detected in step S6, or if no password match is detected in step S10, the process proceeds to step S26 to record an abnormality. And immediately end the flow. This notification is made on the display unit 208 or the speaker 210 of FIG.

FIG. 6 is a flowchart showing details of the power supply process in step S20 of FIG. When the flow starts, it is checked again in step S32 whether or not the flow has started due to an interruption due to the arrival of the charging start time in a state where the charging cable 12 is connected. If the start is due to a time arrival interrupt, the time monitor is canceled in step S34 and the time arrival interrupt is disabled in step S36, and the process proceeds to step S38. On the other hand, if it is not a time arrival interrupt, the process directly proceeds to step S36.

In step S38, it is checked whether or not the connection plug mechanical sensor 308 in FIG. 4 detects the connection of the dedicated plug of the charging cable 12. If the plug is the dedicated plug, the process proceeds to step S40 and the power supply switch 204 is turned on. As a result, a power supply voltage of 200 volts is applied to the connection portion 8. Next, in step S42, based on the signal from the charge meter 202, it is checked whether the connection after the charging cable 12 is OK and current flows. If the connection is OK, the process proceeds to step S44, and it is also checked whether the output impedance is OK as planned based on the signal from the charge meter 202.

If it is detected in step S44 that the output impedance is OK, the process proceeds to step S46, and the eco display process is entered. Details thereof will be described later. When the eco display process ends, the process proceeds to step S48, and it is checked whether or not the charging is completed based on information from the charge meter 202 or the secondary battery 20 of the vehicle. If the completion of charging cannot be detected, the process returns to step S42. Thereafter, unless there is an abnormality in connection or impedance, steps S42 to S48 are repeated until the charging is completed. When the completion of charging is detected in step S48, the process proceeds to step S50, the power supply switch is turned off, and the process proceeds to the eco display process in step S52. When the eco display process is completed, the flow ends.

On the other hand, if it is not possible to detect that the connection is OK in step S42, or if it is not possible to detect that the output impedance is OK in step S44, an error is recorded and reported in step S54, and step S50 is immediately performed. , And turn off the power feed switch. Since the time from turning on the power supply switch in step S40 to turning off the power supply switch in step S50 due to such an abnormality is extremely short, power is not substantially taken out from the connection portion 8, and there is a danger. Absent. If it is not detected in step S38 that the plug is a dedicated plug, the process proceeds to step S56, where an abnormality is recorded and reported, and the flow is immediately terminated.

FIG. 7 is a flowchart showing details of the eco display process in steps S46 and S52 of FIG. When the flow starts, it is checked in step S62 whether or not charging is in progress. If charging is in progress, the process proceeds to step S64 to take action to display the current charging rate, and in step S66 the charging completion scheduled time is displayed. Then, the process proceeds to step S68. Furthermore, it progresses to step S70, the instruction | indication for performing the hand display of the outlet unit 6 is performed, and it transfers to step S70. The above corresponds to the operation at the time of step S46 in FIG.

On the other hand, if it is not detected in step S62 that charging is in progress, the process proceeds to step S72 to check whether or not the charging is complete. If the charging is completed, the process proceeds to step S74 to perform a process for displaying the completion of the charging, and a process for performing a voice notification for announcing the charging completion in step S76. Further, in step S78, a measure for blinking the hand illumination 46 of the outlet unit 6 is performed, and the process proceeds to step S68. This is to make the charge completion display in the hand display 44 conspicuous and to make it possible to notify the charge completion only by the hand illumination 46. If the completion of charging is not detected in step S72, the process proceeds directly to step S70 because neither charging nor charging is completed. The operation from step S72 through step S78 to step S68 or the operation from step S72 directly to step S70 corresponds to the operation at the time of step S52 in FIG.

In step S70, the monthly charge amount to the vehicle 4 is displayed. And it progresses to step S80 and it is checked whether the eco power generation system which may generate electric power sales, such as the solar system 78 and wind power generation, is introduced in the residence. If the eco power generation system has been introduced, the process proceeds to step S82, and the monthly accumulated eco power generation amount is displayed. Further, in step S84, the balance between the monthly accumulated eco-electric power generation amount and the monthly charged amount to the vehicle 4 is displayed. Thereby, it is possible to know the rate of charging of the vehicle 4 due to natural energy. Further, in step S86, the balance in step S84 is converted into a CO2 emission amount and displayed, and step S88 is reached. These are the contents of the eco display that displays the degree of contribution to the protection of the global environment through the adoption of the vehicle 4 and its charging system. In addition, when adoption of an eco power generation system cannot be detected in step S80, the above eco display is abbreviate | omitted and it directly reaches step S88.

In step 88, it is checked again whether charging is in progress. If it is not detected that charging is in progress, the process proceeds to step S90 to check whether display end operation has been performed. If there is no operation, the process proceeds to step S92, and it is checked whether or not a predetermined time has elapsed since the display was started. Then, if the predetermined time has not elapsed, the process returns to step S62. Hereinafter, unless charging is being performed and the predetermined time has not elapsed, steps S62 to S62 to step S92 are repeated. This is because the display after completion of charging is continued for a predetermined time. Note that when the predetermined time has elapsed in step S92, the eco-display processing flow ends. The eco display processing flow is also ended when it is detected in step S90 that the display end operation has been performed. The above corresponds to the operation in step S52 of FIG.

On the other hand, when it is detected in step S88 that charging is in progress, the eco-display flow in FIG. 7 is also terminated. This corresponds to the operation in step S46 in FIG. The eco display process of step S46 is entered again.

The eco-display flowchart of FIG. 7 functions as part of the power supply process as the detailed flow of steps S46 and S52 of FIG. 6 as described above, and the control computer 114 is independent of power supply. It is also activated by an interruption due to the display start operation signal being transmitted to. In this case, the operation jumps directly from step S62 to step S70 via step S72.

As mentioned above, in the Example of this invention, the vehicle charging system containing the garage 2 which can accommodate the plug-in hybrid type vehicle 4 is disclosed. However, the present invention is not limited to this, and can be applied to a vehicle charging system including a pure electric vehicle that does not use a gasoline engine and a garage that can accommodate the pure electric vehicle. Further, the various features of the present invention can be applied not only to a garage attached to a residence as in the embodiment but also to a commercial parking lot.

It is a block diagram which shows the Example of the vehicle charging system which concerns on embodiment of this invention. FIG. 2 is a block diagram showing details of wiring relationships in the embodiment of FIG. 1. It is a block diagram which shows the detail of the electric power feeding opening-and-closing part and housing system in the outlet unit of a garage in the Example of FIG. FIG. 2 is a block diagram illustrating details of a power supply switch and the like in a power supply opening / closing unit in the embodiment of FIG. 1. It is a flowchart which shows the basic operation | movement of the control computer of a residence system. It is a flowchart which shows the detail of step S20 of FIG. It is a flowchart which shows the detail of step S46 and step S52 of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 8 Power supply part 40 Power supply opening / closing part 114 Control part 108 1st outside line 110 2nd outside line 112 Neutral line 114 Detection part

Claims (15)

A power supply unit that outputs power to a vehicle having a battery, a power supply opening / closing unit that determines whether or not power is supplied to the power supply unit, and the power supply unit unless it is detected that the vehicle is correctly connected to the power supply unit. And a control unit that controls the power supply opening and closing unit so as to prohibit the power supply of the vehicle. The power supply opening / closing unit receives power from a single-phase three-wire power line having a first outer line, a second outer line, and a neutral line, and supplies high voltage power from between the first outer line and the second outer line to the power feeding unit. The charging system for a vehicle according to claim 1, wherein the charging system is supplied. 3. The vehicle charging system according to claim 2, wherein the control unit is supplied with low-voltage electric power from between one of the first outer line and the second outer line and a neutral line. 4. 4. The control unit according to claim 1, wherein the control unit controls the power supply opening / closing unit to prohibit power supply to the power supply unit unless it detects that the connection through the power supply unit is normal. The vehicle charging system according to claim 1. 5. The control unit according to claim 1, wherein the control unit controls the power supply opening / closing unit to prohibit power supply to the power supply unit unless it detects that the output impedance from the power supply unit is normal. The vehicle charging system according to claim 1. The control unit prohibits power supply to the power supply unit by controlling the power supply opening / closing unit unless detecting that a connection part having a predetermined shape is connected to the power supply unit. The vehicle charging system according to claim 5. The control unit controls the power supply opening / closing unit to prohibit power supply to the power supply unit unless it detects that an uncharged vehicle is connected to the power supply unit. A charging system for a vehicle according to any one of the above. 8. The control unit according to claim 1, wherein the control unit controls the power supply opening / closing unit to prohibit power supply to the power supply unit unless a vehicle connected to the power supply unit can be specified. Charging system for vehicles. 9. The control unit according to claim 1, wherein the control unit controls the power supply opening / closing unit to prohibit power supply to the power supply unit unless a vehicle connected to the power supply unit can be authenticated. Charging system for vehicles. The said control part automatically starts the detection of whether the vehicle was correctly connected to the said electric power feeding part by the connection of the vehicle to the said electric power feeding part, The any one of Claim 1 to 9 characterized by the above-mentioned. Charging system for vehicles. 11. The control unit according to claim 1, wherein the control unit automatically starts detection of whether or not a vehicle is correctly connected to the power supply unit when a charging start time for the power supply unit arrives. The charging system for vehicles described in 1. The charging for a vehicle according to any one of claims 1 to 11, wherein the control unit detects whether or not the vehicle is correctly connected to the power feeding unit by power line communication via the power feeding unit. system. 13. The vehicle according to claim 12, wherein the power supply opening / closing unit allows a communication signal superimposed for power line communication to be transmitted via the power supply unit regardless of whether or not power is supplied. Charging system. 14. The vehicle charging system according to claim 1, wherein the control unit detects whether or not the vehicle is correctly connected to the power feeding unit by wireless communication with the vehicle. A power supply unit that outputs electric power to a vehicle having a battery, a detection unit that detects a power supply start condition from the power supply unit to the vehicle, a power supply opening / closing unit that determines whether power is supplied to the power supply unit, and a time When there is no traditional contract by band, power supply is started by detecting the power supply start condition by the detection unit, and when there is a traditional contract by time zone, even if the detection unit detects the power supply start condition, And a control unit for the power supply opening / closing unit that suspends power supply start until arrival.