JP2012050222A - Charging/discharging system for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable efficient charging in a short time in response to demands from a plurality of automobiles.SOLUTION: A charging/discharging system for an automobile includes: electric power transfer means 8, connected to an electric vehicle 2, for exchanging power with a rechargeable battery 3; communication means 7, connected to the electric vehicle 2, for communicating with the electric vehicle 2; vehicle information inputting means 4 for receiving information on use of the electric vehicle 2 and current information on charging the rechargeable battery 3; charging/discharging scheduling means 5 for determining, based on the received information, a priority degree of charging or availability of charging/discharging to the rechargeable battery 3 of the each electric vehicle and outputting a charging/discharging demand; and charging/discharging control means 6 for controlling charging/discharging of the rechargeable battery 3 via the electric power transfer means 8 in response to the charging/discharging demand. The charging/discharging scheduling means 5 discharges the rechargeable battery 3 of the electric vehicle 2 which is determined to be a lower priority degree and dischargeable, and charges the rechargeable battery 3 of the electric vehicle 2 which is determined to be a higher priority degree and chargeable by using the discharge power discharged.

Description

  The present invention relates to an automobile charging / discharging system, and more particularly, to an automobile charging / discharging system for charging and discharging an automobile requiring charging such as an electric vehicle and a plug-in hybrid vehicle.

  With the spread of electric vehicles, it has become an important technology how to charge in-vehicle storage batteries in a short time and efficiently. As a conventional charging / discharging system of an electric vehicle, for example, Patent Document 1 discloses a power supply facility capable of buying and selling electric power between a plurality of electric vehicles in a parking lot or the like, and charging and discharging. This power supply facility instructs the driver to input charging and selling power, and if an excess or deficiency in the amount of charging or selling power occurs, it is supplemented with an external storage battery.

JP 2007-252118 A

  However, in the power supply facility disclosed in Patent Document 1, in the case where a plurality of electric vehicles request charging at the same time, a limited amount of power is shared by a plurality of units, so that it is not possible to charge efficiently in a short time. was there. In addition, since the time zones and schedules for using each electric vehicle are more often different, there is a problem that efficient charging is not possible if all electric vehicles are charged equally.

  This invention is made in order to solve this subject, and it aims at obtaining the charging / discharging system of the electric vehicle which can be charged efficiently in a short time with respect to the request | requirement from several motor vehicles. .

  The present invention is an automobile charging / discharging system for charging / discharging an automobile that has a storage battery and obtains driving force based on the electric power from the storage battery, and is connected to the automobile and supplies electric power to the storage battery. Power supply means for supplying and charging the storage battery and obtaining discharge power from the storage battery, communication means connected to the automobile and communicating with the automobile, and information on the planned use of the automobile The vehicle usage information and the storage battery charging information, which is information on the current state of charge of the storage battery of the vehicle, are input from the vehicle via the communication means, or directly from the outside. Based on the vehicle information input means input, the vehicle usage information and the storage battery charging information input from the vehicle information input means, Charging priority and charging / discharging determination, and charging / discharging schedule means for outputting to the automobile as a charging / discharging request, and via the power transfer means according to the charging / discharging request output by the charging / discharging scheduling means Charging / discharging control means for controlling charging / discharging of the storage battery of the automobile performed by the charging / discharging control means according to the charging / discharging request, the charging priority is low by the charging / discharging scheduling means, and The storage battery of the automobile determined to be dischargeable is discharged, and the storage battery of the automobile determined to be chargeable with high charge priority by the charge / discharge schedule means is charged by the discharged discharge power. It is the charging / discharging system for motor vehicles characterized by this.

  The present invention is an automobile charging / discharging system for charging / discharging an automobile that has a storage battery and obtains driving force based on the electric power from the storage battery, and is connected to the automobile and supplies electric power to the storage battery. Power supply means for supplying and charging the storage battery and obtaining discharge power from the storage battery, communication means connected to the automobile and communicating with the automobile, and information on the planned use of the automobile The vehicle usage information and the storage battery charging information, which is information on the current state of charge of the storage battery of the vehicle, are input from the vehicle via the communication means, or directly from the outside. Based on the vehicle information input means input, the vehicle usage information and the storage battery charging information input from the vehicle information input means, Charging priority and charging / discharging determination, and charging / discharging schedule means for outputting to the automobile as a charging / discharging request, and via the power transfer means according to the charging / discharging request output by the charging / discharging scheduling means Charging / discharging control means for controlling charging / discharging of the storage battery of the automobile performed by the charging / discharging control means according to the charging / discharging request, the charging priority is low by the charging / discharging scheduling means, and The storage battery of the automobile determined to be dischargeable is discharged, and the storage battery of the automobile determined to be chargeable with high charge priority by the charge / discharge schedule means is charged by the discharged discharge power. Because it is a charging / discharging system for automobiles, it is possible to charge efficiently in a short time in response to requests from multiple automobiles. It can be.

It is the schematic block diagram which showed the structure of the charging / discharging system for motor vehicles in Embodiment 1 of this invention. It is a flowchart figure which shows operation | movement of the charging / discharging system for motor vehicles in Embodiment 1 of this invention. It is a block diagram which shows the structure of the charging / discharging schedule means of the charging / discharging system for motor vehicles in Embodiment 1 of this invention. It is a flowchart figure which shows operation | movement of the charging / discharging schedule means of the charging / discharging system for motor vehicles in Embodiment 1 of this invention. It is a block diagram which shows the structure of the charging / discharging control means of the charging / discharging system for motor vehicles in Embodiment 1 of this invention. It is a flowchart figure which shows operation | movement of the charging / discharging control means of the charging / discharging system for motor vehicles in Embodiment 1 of this invention. It is explanatory drawing which showed the effect of the charging / discharging system for motor vehicles in Embodiment 1 of this invention.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an automobile charging / discharging system according to the present invention will be described below with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 is a schematic configuration diagram showing a configuration of an automotive charge / discharge system (hereinafter simply referred to as a charge / discharge system) according to Embodiment 1 of the present invention. This charging / discharging system 1 is connected to and communicates with a plurality of electric vehicles 2, the state of charge (SOC) of each vehicle of those electric vehicles 2, and the use of the vehicle from the driver 10. The charging schedule is adjusted according to the input of information, vehicles with low charging priority are temporarily discharged, charging power obtained by converting commercial power to the discharged power is added, and charging priority is high This is a system in which the vehicle is charged with priority. This charging / discharging system can be installed in a space where a plurality of electric vehicles can be parked. In the present embodiment, the description is limited to a case where a plurality of electric vehicles are connected. However, any vehicle other than an electric vehicle may be used as long as it is equipped with a storage battery, such as a plug-in hybrid vehicle. It can also be applied to other vehicles. Further, it is assumed that electric vehicles and such types of vehicles may be mixed in a plurality of vehicles. Further, in this embodiment, the input of information on the planned use of the vehicle is described as an input from the driver 10, but naturally the information on the planned use of the vehicle from other people, even if it is not the driver. May be input.

  In the present embodiment, as shown in FIG. 1, in the charging / discharging system 1, information on the scheduled use of the electric vehicle 2 (hereinafter referred to as usage information) is input by the driver 10, and The vehicle information input means 4 to which information on the state of charge of the mounted storage battery 3 (hereinafter referred to as charge information) is input, the usage information of the electric vehicle 2 from the vehicle information input means 4, and the storage battery 3 of the electric vehicle 2 The charging information is input, the charging priority and charging / discharging are determined based on the charging information, and the charging / discharging schedule unit 5 that outputs a charging / discharging request to each electric vehicle 2 and the charging / discharging scheduling unit 5 output the charging information. And charging / discharging control means 6 for controlling charging / discharging of the storage battery 3 of the electric vehicle 2 in accordance with the charging / discharging request. In addition, the charging / discharging system 1 connects the communication means 7 that performs connection and communication with each electric vehicle 2, and the charging / discharging system 1 and the storage battery 3 of the electric vehicle 2. Power transfer means 8 for transferring power to and from the storage battery 3. Further, the charging / discharging system 1 is connected to the commercial power source 9 in order to obtain the electric power when the electric power discharged from the storage battery 3 of the electric vehicle 2 is not enough or when charging is performed using the electric power from the commercial power source. Is done.

  In FIG. 1, vehicle information input means 4 is connected to a plurality of electric vehicles 2 via communication means 7, receives charging information SOC_Info_Input of storage battery 3 from each connected electric vehicle 2, and receives it for each vehicle. Output as SOC information SOC_Info. The vehicle information input means 4 receives use information Drive_Info_Input of the electric vehicle 2 used by the driver 10 that is input by an input device (not shown) such as a button or a touch panel by the operation of the driver 10, Output as usage information Drive_Info. As the communication means 7, communication such as CAN may be used, and other known communication techniques may be used for wireless communication.

  The charge / discharge schedule means 5 receives each vehicle SOC information SOC_Info and vehicle use information Drive_Info from the vehicle information input means 4 and outputs a charge / discharge request Cg_Dcg_Req for each electric vehicle 2. Details of the charge / discharge schedule means 5 will be described later.

  The charge / discharge control means 6 is connected to the storage batteries 3 of the plurality of electric vehicles 2 via the power transfer means 8, and the storage batteries mounted on the electric vehicle 2 based on the charge / discharge request Cg_Dcg_Req from the charge / discharge schedule means 5. The charging / discharging electric power Cg_Dcg_Power is exchanged by charging 3 or discharging from the storage battery 3 mounted on the electric vehicle 2. As the power transfer means 8, a known power transfer system using a wired cable or radio may be used. Details of the charge / discharge control means 6 will be described later.

  The commercial power source 9 is an AC 100V or AC 200V power source used in general homes, and is connected to the charge / discharge control means 6 as necessary.

  Hereinafter, the operation of the charge / discharge system 1 according to the present invention will be described. The vehicle information input means 4 receives the charging information SOC_Info_Input of the storage battery 3 mounted in each electric vehicle 2 and the usage information Drive_Info_Input of each electric vehicle 2 input from the driver 10, and each vehicle SOC information SOC_Info and The vehicle usage information Drive_Info is output to the charge / discharge schedule means 5. The charge / discharge schedule means 5 receives each vehicle SOC information SOC_Info and vehicle use information Drive_Info, determines the charge priority and charge / discharge availability for each electric vehicle 2 based on the information, and stores the information. Including charge / discharge request Cg_Dcg_Req is output. The charge / discharge request Cg_Dcg_Req is a charge request or a discharge request for each electric vehicle 2. The charge / discharge control means 6 receives the charge / discharge request Cg_Dcg_Req and the charge power AC_Source from the commercial power supply 9 as necessary, and exchanges each vehicle charge / discharge power Cg_Dcg_Power with the storage battery 3 mounted on each electric vehicle 2. .

  Next, operation | movement of the charging / discharging system 1 is further demonstrated based on the flowchart of FIG. FIG. 2 includes steps S101 to S105 between the start and the end. First, in step S101, the electric vehicle 2 and the charge / discharge system 1 are connected by the operation of the driver 10. In the next step S102, the vehicle information input means 4 reads each vehicle SOC information SOC_Info_Input indicating the charging state of the storage battery 3 from each electric vehicle 2. In step S <b> 103, the vehicle information input unit 4 reads vehicle usage information Drive_Info_Input input from the driver 10. In step S104, the charge / discharge schedule means 5 reads each vehicle SOC information SOC_Info and vehicle use information Drive_Info, generates and outputs a charge / discharge request Cg_Dcg_Req based on them. In step S105, the charging / discharging control means 6 performs charging / discharging with the storage battery 3 mounted on each electric vehicle 2 according to the charging / discharging request Cg_Dcg_Req, and gives / receives each vehicle charging / discharging power Cg_Dcg_Power. At this time, when charging the storage battery 3, the charge / discharge control means 6 obtains the charging power AC_Source from the commercial power supply 9 as necessary, and discharges it from the other storage battery 3 first. In addition to the discharge power obtained by the above, the storage battery 3 is charged. Alternatively, charging may be performed using only one of the charging power AC_Source from the commercial power supply 9 or the discharging power obtained by discharging from the other storage battery 3 first.

  Next, the charge / discharge schedule means 5 will be described with reference to FIG. The charge / discharge schedule means 5 includes a charge priority determination means 31, a charge / discharge availability determination means 32, and a charge / discharge request determination means 33. In this configuration, first, the vehicle use information Drive_Info and each vehicle SOC information SOC_Info are read by the charge priority determination means 31, and each vehicle charge priority ChargePriority is output (details will be described later). Next, the vehicle use information Drive_Info and each vehicle SOC information SOC_Info are read by the charge / discharge availability determination means 32 and each vehicle charge / discharge availability CgDcg_RW is output (details will be described later). Next, the charge / discharge request determination means 33 reads each vehicle charge priority ChargePriority and each vehicle charge / discharge availability CgDcg_RW and outputs a charge / discharge request Cg_Dcg_Req (details will be described later).

  The charge priority determination means 31 includes information such as scheduled use time and travel distance of each electric vehicle 2 and information such as required SOC (required charge amount) included in each vehicle use information Drive_Info, and each vehicle SOC information SOC_Info. Based on the current SOC of each electric vehicle 2 included, the priority of charging of each electric vehicle 2 is determined and output as each vehicle charging priority ChargePriority. For example, assuming that three electric vehicles are connected, the scheduled use time is approaching, and vehicle A, which will not reach the required SOC in normal charging, has priority “1” and the scheduled use time is approaching. The vehicle B that can reach the required SOC by normal charging has a priority “2”, the vehicle C that has a large margin in the scheduled use time and is in the vicinity of the required SOC, the priority “3”, etc. In order to determine the priority for each vehicle use information Drive_Info and each vehicle SOC information SOC_Info, a ranking is performed in advance, and three connected electric devices are based on the ranking. Each vehicle charging priority ChargePriority may be determined for each vehicle 2. In the present embodiment, the charging priority determination means 31 determines each vehicle charging priority ChargePriority from each vehicle usage information Drive_Info and each vehicle SOC information SOC_Info, but as other information, The priority may be determined with higher accuracy by adding customer authentication information such as the owner or ID of each vehicle and travel history information such as the travel frequency, final travel time, and final travel distance of each vehicle.

  The charge / discharge possibility determination means 32 includes information such as scheduled use time and travel distance of each electric vehicle 2 and information such as required SOC included in each vehicle use information Drive_Info, and each electric vehicle included in each vehicle SOC information SOC_Info. Whether or not each electric vehicle 2 is chargeable / dischargeable is determined based on the current SOC of No. 2 and output as chargeability / dischargeability CgDcg_RW. Charging / discharging availability CgDcg_RW is, for example, a vehicle that has not yet reached the required SOC because the scheduled use time is approaching, and charging is “possible” and discharge is “not allowed”. The vehicle that has reached the charge is “No” and the discharge is “No”, and the vehicle that is not approaching the required time and has reached the required SOC or more is charged “No” and the discharge is “Yes”. In order to determine the priority in advance for each combination of each vehicle usage information Drive_Info and each vehicle SOC information SOC_Info, based on the ranking, the connected electric vehicle Whether or not charging / discharging is possible is determined for each of the two, “permitted” is determined as “1”, “not permitted” is determined as “0”, and the like is transmitted as charging / discharging availability CgDcg_RW.

  The charge / discharge request determination means 33 outputs a charge / discharge request Cg_Dcg_Req from each vehicle charge priority ChargePriority and each vehicle charge / discharge availability CgDcg_RW. For example, vehicle A has a charging priority “1”, charging “possible”, discharge “no”, vehicle B has a charging priority “2”, charging “possible”, discharge “possible”, and vehicle C has a charging priority “3”, charging “possible”. If the discharge is “possible”, the vehicle A having a higher priority is determined to be “charge”, while the vehicles B and C having the second priority or lower and which can be discharged are determined to be “discharge”. The charging / discharging request Cg_Dcg_Req is output by setting “1” as “1”, “discharging” as “0”, etc., and charging / discharging the storage battery 3 is requested to each electric vehicle 2.

  Next, operation | movement of the charging / discharging schedule means 5 is demonstrated based on the flowchart of FIG. FIG. 4 includes steps S201 to S205 between the start and the end. First, in step S201, an input port (not shown) of the charge / discharge schedule means 5 reads vehicle usage information Drive_Info. In the next step S202, the input port (not shown) of the charge / discharge schedule means 5 reads each vehicle SOC information SOC_Info. In step S203, the charging priority determination unit 31 reads the vehicle usage information Drive_Info and each vehicle SOC information SOC_Info, and outputs each vehicle charging priority ChargePriority. In step S204, the charge / discharge enable / disable determining means 32 reads the vehicle use information Drive_Info and each vehicle SOC information SOC_Info, and outputs each vehicle charge / discharge enable / disable CgDcg_RW. In step S205, the charge / discharge request determination means 33 reads each car charge priority ChargePriority and each car charge / discharge availability CgDcg_RW, and outputs a charge / discharge request Cg_Dcg_Req.

  Although not described in FIGS. 3 and 4, there may be a case where the number of electric vehicles 2 connected to the charge / discharge system increases or decreases with the passage of time. Therefore, the charging / discharging schedule means 5 detects the increase / decrease in the number of electric vehicles 2 and, when detecting the increase / decrease, performs the schedule again, and re-determines the charge priority ChargePriority and charge / discharge availability CgDcg_RW. The charge / discharge request Cg_Dcg_Req is output again. Detection of the increase / decrease in the number of electric vehicles 2 may be performed periodically, or it is detected each time the electric vehicle 2 is connected to or disconnected from the charging / discharging system 1, and the increase / decrease in the number of electric vehicles 2 is detected. May be recognized.

  Next, the charge / discharge control means 6 will be described with reference to FIG. As shown in FIG. 5, the charge / discharge control means 6 includes a switch command unit 51, an AC / DC converter 52, DC / DC converters 53A and 53C, diodes 54A, 54B and 54C, a switch 55A, 55B and 55C, and a voltage adder 56 are included. In the example of FIG. 5, a configuration in which up to three electric vehicles 2 can be connected is shown. However, the configuration is naturally not limited to this, and may be appropriately configured so that an arbitrary number can be connected. That is, the switches 55B and 55C, the diodes 54B and 54C, and the DC / DC converter 53C corresponding to the number of electric vehicles 2 that can be connected at one time are provided.

  With this configuration, first, the switch command unit 51 reads the charge / discharge request Cg_Dcg_Req and outputs a switch command SW_Req based thereon. The switch command SW_Req instructs the switches 55A, 55B, and 55C to open and close. According to the opening / closing instruction to the switches 55A, 55B, and 55C, it is possible to charge only from the discharge power from the storage battery 3 without using the charge power using the commercial power source 9. Here, a description will be given assuming that charging is performed by adding charging power using the commercial power source 9 and discharging power from the storage battery 3. Next, the commercial power supply 9 is received, and the analog / digital conversion is performed by the AC / DC converter 52, the digital / digital conversion is further performed by the DC / DC converter 53A, and the diode 54A is passed. As the techniques of the AC / DC converter 52, the DC / DC converter 53, and the diode 54, known techniques may be used. Next, the power passing through the diode 54A is switched by the switch 55A. This switching is based on the switch command SW_Req output from the switch command unit 51. Next, the electric power converted from the commercial power source 9 and the electric power discharged by the electric vehicle 2 are added by the voltage adding unit 56. When the charge / discharge request Cg_Dcg_Req is a charge instruction, the charge-side switch 55B is turned on, the discharge-side switch 55C is turned off, the added power is passed through the diode 54B, and the storage battery 3 is charged. On the other hand, when the charge / discharge request Cg_Dcg_Req is a discharge instruction, the charge side switch 55B is turned OFF, the discharge side switch 55C is turned ON, and the voltage of the storage battery 3 is digital / digital converted by the DC / DC converter 53C, and the diode 54C Is transmitted to the voltage adder 56. The voltage adding unit 56 may have a storage battery (not shown) inside and store the power obtained from the storage battery 3 by discharging until it is needed. The blocks used in this embodiment are merely examples, and power addition may be performed by other methods. For example, if the location of addition is changed, it may be added in the electric vehicle or in the DC and AC states, and the power is added.

  In the present embodiment, the charge / discharge control means 6 discharges the storage battery 3 of the electric vehicle 2 whose charge priority is determined to be low and can be discharged by the charge / discharge schedule means 5, and by the discharged discharge power, The storage battery 3 of the electric vehicle 2 that has been determined by the charge / discharge schedule means 5 to have a high charge priority and is chargeable is charged. At this time, if only the discharge power is not sufficient, the charge / discharge control means 6 adds the charge power obtained by converting the power from the commercial power supply 9 to the discharge power, and the charge / discharge schedule means 5, the storage battery 3 of the electric vehicle 2 whose charging priority is determined to be high and chargeable is charged.

  Further, when there is no storage battery 3 of the electric vehicle 2 whose charging priority is determined to be low and can be discharged by the charging / discharging scheduling means 5, the charging / discharging control means 6 is based on the charging priority and charging availability. The storage battery of the electric vehicle 2 is charged by allocating or adjusting the charging power obtained by converting the electric power from the vehicle.

  The operation of the charge / discharge control means 6 will be described based on the flowchart of FIG. FIG. 6 includes steps S301 to S306 between the start and the end. First, in step S301, an input port (not shown) of the charge / discharge control means 6 reads a charge / discharge request Cg_Dcg_Req. In the next step S302, the switch command unit 51 reads the charge / discharge request Cg_Dcg_Req and outputs the switch command SW_Req. In step S303, the AC / DC converter 52 AC / DC converts the charging power from the commercial power supply 9. In step S304, the DC / DC converter 53A performs DC / DC conversion on the voltage DC-converted in step S303. In step S <b> 305, the voltage adding unit 56 adds the voltages of the charging power from the commercial power source 9 and the discharging power from the storage battery 3. In step S306, charging / discharging with respect to the storage battery 3 according to charging / discharging request | requirement Cg_Dcg_Req is implemented by switch opening / closing based on switch command SW_Req of switch 55B and 55C.

  FIG. 7 is a diagram showing the effect of the present embodiment. FIG. 7A shows an example of the vehicle usage information Drive_Info. The vertical axis indicates the type of vehicle (A, B, C), and the horizontal axis indicates time. FIG. 7B shows an example of the charge / discharge request Cg_Dcg_Req. The vertical axis indicates the type of vehicle (A, B, C), and the horizontal axis indicates time. FIG.7 (c) has shown an example of each vehicle SOC information SOC_Info. The vertical axis indicates SOC information, and the horizontal axis indicates time. The solid line indicates the SOC information of the vehicle B, the broken line indicates the vehicle A, and the alternate long and short dash line indicates the SOC information of the vehicle C.

  Looking at the vehicle usage information Drive_Info in FIG. 7A, the vehicle B is scheduled to be used at time t1, and the required SOC is 70% or more. At time t2, vehicle A is scheduled to be used, and the required SOC is 75% or more. At time t3, the vehicle C is scheduled to be used, and the required SOC is 50% or more. As shown in FIG. 7C, the SOC states of the vehicles A, B, and C at the time of the initial connection state (time t0) are 70%, 40%, and 60%. A charge / discharge schedule is performed from the vehicle usage information Drive_Info and each vehicle SOC state SOC_Info, and the charge / discharge request Cg_Dcg_Req is determined. The request to each vehicle until the time t1 is “discharge” because the vehicle A has sufficient time until the scheduled use time and the SOC state is also sufficient, and the vehicle B is approaching the scheduled use time and the SOC state is also The normal charge capacity (shown by the dotted line in the figure) does not seem to satisfy the required amount, so it becomes “charge”, and the vehicle C has sufficient time until the scheduled use time, and the SOC state is also sufficient, so “discharge” Become. By adding the electric power discharged from the vehicles A and C and the normal charging power from the commercial power source 9, the charging ability to the vehicle B is improved, and the required SOC can be satisfied by the scheduled use time. At time t1, since the vehicle is used, the connection to the vehicle B is released, and the remaining connected vehicles are A and C. When the number of units becomes two, the schedule is rescheduled, and the charge / discharge request Cg_Dcg_Req is determined again. Vehicle A is determined to be “charge”, vehicle C is determined to be “charge” after “standby”, and vehicle A is charged until time t2. Charging the vehicle A is performed by adding the discharge power from the storage battery 3 and the charge power from the normal commercial power supply 9. Excessive discharge accelerates the deterioration of the storage battery 3, and therefore, the charge / discharge control means 6 may control the vehicle to the lower limit SOC determined in advance for each vehicle. In the example of FIG. 7B, the charging of the vehicle A is completed before the time t2. The charging of the vehicle C is performed after the charging of the vehicle A is completed. As with the vehicle A, the charging of the vehicle C is performed by adding the discharging power from the storage battery 3 and the charging power from the normal commercial power source 9.

  In other cases, if there is no charge / discharge request Cg_Dcg_Req that indicates “discharge” among all the electric vehicles connected to this system, use a method such as centralized charging or average charging for commercial power What is necessary is just to distribute the normal charge power from 9 and to charge.

  In this way, when charging a plurality of electric vehicles, the discharge power obtained by temporarily discharging the storage battery of the low priority electric vehicle and the normal charging power from the commercial power source 9 are added, and the high priority electric vehicle By performing charging, the charging capability can be improved and the charging time can be shortened. Moreover, it becomes possible to charge efficiently by scheduling charging / discharging based on a priority.

  Further, as described above, it is also possible to charge without using normal charging power from the commercial power source 9. As described above, since the charging by the normal charging power from the commercial power source 9, the charging by the discharging power from the storage battery 3, and the charging by adding them can be switched, for example, the commercial power source 9 is expensive. Since normal charging power from the commercial power source 9 can be used only during an inexpensive time period, charging at a low cost is also possible.

  As described above, according to the present embodiment of the present invention, when there is an electric vehicle that needs to be preferentially charged in a plurality of electric vehicles that require charging, the charging priority is low and the electric vehicle can be discharged. Because the electric vehicle storage battery can be temporarily discharged and the electric battery storage battery with high charging priority can be charged with the combined electric power of the discharged electric power and commercial power, the storage battery of the corresponding electric vehicle can be charged in a short time Is possible. In addition, since the charging schedule can be adjusted according to the charging priority, the electric vehicle can be efficiently charged by controlling the charging power.

  DESCRIPTION OF SYMBOLS 1 Charging / discharging system, 2 Electric vehicle, 3 Storage battery, 4 Vehicle information input means, 5 Charging / discharging schedule means, 6 Charging / discharging control means, 7 Communication means, 8 Power transfer means, 9 Commercial power supply, 10 Driver, 31 Charge priority Degree determination means, 32 charge / discharge enable / disable determination means, 33 charge / discharge request determination means, 51 switch command section, 52 AC / DC converter, 53A, 53C DC / DC converter, 54A, 54B, 54C diode, 55A, 55B, 55C switch, 56 voltage adder.

Claims (5)

A charging / discharging system for an automobile for charging / discharging an automobile equipped with a storage battery and obtaining driving force based on electric power from the storage battery,
Power transfer means connected to the automobile, supplying power to the storage battery to charge the storage battery, and obtaining discharge power from the storage battery;
A communication means connected to the vehicle for communicating with the vehicle;
The vehicle usage information, which is information on the planned use of the vehicle, and the storage battery charging information, which is information on the current state of charge of the storage battery of the vehicle, are input from the vehicle via the communication means. Or vehicle information input means directly input from the outside,
Based on the use information of the vehicle input from the vehicle information input means and the charging information of the storage battery, the charging priority for the storage battery of each vehicle and the possibility of charge / discharge are determined and output to the vehicle as a charge / discharge request Charging / discharging schedule means,
Charge / discharge control means for controlling charge / discharge of the storage battery of the automobile performed via the power transfer means in response to the charge / discharge request output by the charge / discharge schedule means,
In response to the charge / discharge request, the charge / discharge control means discharges the storage battery of the automobile, which is determined to be dischargeable by the charge / discharge schedule means, and the discharge power is discharged. The charging / discharging system for an automobile, wherein the storage battery of the automobile, which is determined to be chargeable by the charging / discharging schedule means, is charged.   The charge / discharge control means is obtained by converting a commercial power source into discharge power obtained by discharging from the storage battery of the automobile, the charge priority of which is determined to be low and can be discharged by the charge / discharge schedule means. The charging / discharging system for an automobile according to claim 1, further comprising: charging the storage battery of the automobile, the charging priority of which is determined to be high and chargeable by the charging / discharging scheduling means. .   The charge / discharge control means converts the commercial power source based on the charge priority and chargeability when there is no storage battery of the vehicle whose charge priority is low and determined to be dischargeable by the charge / discharge schedule means. The charging / discharging system for an automobile according to claim 1 or 2, wherein the storage battery of the automobile is charged by distributing or adjusting a schedule of the obtained charging power.   When a new vehicle is connected, the charging / discharging schedule means, again for each currently connected vehicle including the newly connected vehicle, the charge priority and the possibility of charging / discharging again. The charging / discharging system for automobiles according to any one of claims 1 to 3, wherein   The charging / discharging schedule means is a predetermined charging information of the storage battery determined for each of the automobiles, for discharging the storage battery of the automobile whose charging priority is determined to be low and dischargeable by the charging / discharging scheduling means. The charging / discharging system for automobiles according to any one of claims 1 to 4, wherein the charging / discharging system is performed up to a lower limit value.

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