JP2012161241A - Power supply system for electric vehicles - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply system which informs a user of the progress of charging.SOLUTION: A power supply system for electric vehicles includes: a power supply stand 10 for supplying power to an on-vehicle battery of each electric vehicle; a terminal unit 20 that users use; and a server 30 communicating with the power supply stand 10 and the terminal unit 20. The power supply stand 10 supplies power to the on-vehicle battery according to requests from the terminal unit 20 through the server 30 and measures the electric energy. The server 30 has user master information for specifying a user and a registered electric vehicle 50 and a table relating the registered electric vehicle 50 to charging characteristics data of the on-board battery and includes charging progress calculation means. The charging progress calculation means extracts the charging characteristics data corresponding to the registered electric vehicle 50 from the table and calculates the charging progress of the on-vehicle battery by comparing the measurement result of the electric energy to the extracted charging characteristics data. The calculation result is transmitted from the server 30 to the terminal unit 20.

Description

  The present invention relates to a power supply system for charging a battery mounted on an electric vehicle such as an electric vehicle or a hybrid vehicle.

  Electric vehicles such as electric vehicles and hybrid vehicles have been developed for the purpose of reducing environmental burden. In order to widely disseminate these electric vehicles, it is necessary to provide power supply stands for charging on-vehicle batteries in various places. In particular, a power supply stand that can charge an in-vehicle battery while an electric vehicle is in a parking lot is expected to enable efficient charging. There exists a thing of patent document 1 as a technique regarding such a power supply stand.

  This technology issues a parking ticket that records the time of entry when the vehicle enters the parking lot, and allows the vehicle to be issued when the parking fee is settled by reading the parking ticket when leaving the vehicle. It is related with the parking lot apparatus comprised as follows. In this parking lot, a charging device (power supply stand) for charging a battery (vehicle battery) of an electric vehicle and a charging information input / output device are provided. The charging information input / output device includes charging information recording means capable of recording calculation information of charging time of the battery by the charging device with respect to the parking ticket. Further, the fee settlement machine includes a charging fee calculation means for calculating a charging fee from the charging information recorded on the parking ticket. And this parking lot apparatus is comprised so that the vehicle may be left when payment of a parking charge and a charge charge is completed.

JP 2001-312772 A

  The above power supply system can calculate the charge required for charging from the amount of power supplied to the in-vehicle battery, but charging such as when charging is completed or to what percentage of the battery capacity is completed. It is not possible to provide information on the progress status of the user. In particular, in the case of a power feeding system for performing low-speed charging, since the charging time is usually as long as about 6 to 8 hours, it is highly necessary to provide the user with the progress of charging. On the other hand, the charging cable that connects the in-vehicle battery and the power supply station is only provided with a power line that serves as a power supply path, and a communication line for exchanging data on the charging state between the in-vehicle battery and the power supply station. Therefore, it is difficult for the power supply stand to grasp the amount of electricity of the in-vehicle battery itself.

  The present invention has been made in view of the above circumstances, and one of its purposes is to provide a power feeding system for an electric vehicle that can predict and inform the user of the progress of charging, such as the charging end time. There is to do.

  Another object of the present invention is to provide a power supply system for an electric vehicle capable of predicting a deterioration state of an in-vehicle battery such as a battery replacement time and informing a user of the deterioration state.

  Another object of the present invention is to provide a power supply system for an electric vehicle that can inform the user of the deterioration state of the in-vehicle battery in comparison with the deterioration state of the in-vehicle battery of another user.

  A power supply system for an electric vehicle according to the present invention includes a power supply stand for supplying power to an on-vehicle battery of the electric vehicle, a terminal used by a user of the power supply stand, and each of the power supply stand and the terminal via a communication network. And a server for communication. The power supply stand includes switch means for supplying power to the in-vehicle battery in response to a request from the terminal via the server, and power amount measuring means for measuring the amount of power supplied to the in-vehicle battery. The server includes a storage unit, a user authentication unit, and a charging progress state calculation unit. The storage means includes user master information and a table for identifying the user and the registered electric vehicle. The table associates the registered electric vehicle with the characteristic data of the physical quantity that can be acquired by the electric energy measuring means, which is the charging characteristic data of the vehicle battery. The user authentication means authenticates the user with reference to the user input information transmitted from the terminal and the user master information. Then, the charging progress state calculation means extracts charging characteristic data corresponding to the registered electric vehicle of the authenticated user from the table, and the charging characteristic obtained by extracting the measurement data of the electric energy measuring means transmitted from the power supply stand The charging progress state of the in-vehicle battery is calculated with reference to the data, and the calculation result is generated as charging progress state data for transmitting to the terminal.

  According to this configuration, the charging progress state of the battery can be accurately recognized by the charging progress state calculating means using the charging characteristic data corresponding to the in-vehicle battery of the registered electric vehicle. Further, the charging characteristic data is charging characteristic data of the in-vehicle battery and is characteristic data of a physical quantity (for example, an electric quantity such as charging power) that can be acquired by the electric energy measuring means, and therefore, the power supply stand and the in-vehicle battery are connected. Even if the charging cable does not have a communication line for exchanging data regarding the charging state between the power supply stand and the vehicle battery, the charging state can be calculated using a physical quantity that can be grasped on the power supply stand side. it can. Therefore, the user can know the charging progress status of the in-vehicle battery by transmitting the charging progress status data from the server to the terminal.

  As one aspect of the present invention, the charging progress state data includes a charging end time, a required time until the charging ends, a charging rate for the battery capacity, a charging end time according to the charging rate, and a charging end according to the charging rate. One of the required times may be mentioned.

  According to this configuration, the user can specifically know the charging progress state by selecting each of the prescribed parameters as the charging progress state data.

  As one form of this invention, the said memory | storage means memorize | stores the charge log | history data which the electric energy measurement means measured in the past electric power feeding by the said user. Furthermore, the server compares the latest charging history data with the past charging history data and the charging characteristic data of the in-vehicle battery without deterioration, thereby determining the deterioration state of the in-vehicle battery, and transmits the determination result to the terminal. For example, including battery state determination means for generating the determination result data.

  According to this configuration, it is possible to inform the user of the deterioration state of the in-vehicle battery, for example, that the battery capacity is lower than the initial capacity. Therefore, the user can know the time of replacement and maintenance of the in-vehicle battery.

  As one form of this invention, the said server is provided with the statistical processing means which statistically processes the charge log | history data which the electric energy measurement means measured in the past electric power feeding for every vehicle model of a registration electric vehicle. In this case, the charging progress state calculating means uses charging history data statistically processed by the statistical processing means as the extracted charging characteristic data.

  According to this configuration, since the result of statistical processing of the charge history data measured by the power amount measuring means in the past power supply is used for each vehicle type of the registered electric vehicle, charging with reduced variation in the charge history data for each vehicle is used. The charging progress state can be determined using the history data.

  As one aspect of the present invention, for each type of registered electric vehicle, a statistical processing unit that statistically processes the charging history data measured by the power amount measuring unit in the past power supply is provided, and the battery state determination unit includes the latest charging As an object to be compared with the history data, use of the charging history data statistically processed by the statistical processing means can be mentioned.

  According to this configuration, it is possible to grasp the deterioration state of the in-vehicle battery by comparing with the charging history data of other users. Further, by using the statistical processing means, it is possible to determine the deterioration state of the in-vehicle battery using the charging history data in which the variation of the charging history data for each vehicle is reduced.

  As one aspect of the present invention, the charging progress state calculation means is configured to charge data corresponding to an electric vehicle selected from the table via a terminal when the electric vehicle to be fed is different from the registered electric vehicle. Is extracted.

  According to this configuration, even when the power supply target vehicle is other than the registered electric vehicle, accurate charge progress information can be calculated using the charge characteristic data corresponding to the power supply target in-vehicle battery.

  As one form of this invention, it is mentioned that the said charge characteristic data is made into the charge curve which shows the relationship with charging power.

  According to this configuration, the charging progress state can be grasped from the parameters that can be recognized on the power supply stand side during charging.

  As one aspect of the present invention, the power supply stand includes power supply stand side communication means for receiving a physical quantity correlated with charging of the in-vehicle battery transmitted from the registered vehicle side. In this case, the charging progress state calculation means uses the physical quantity as charging progress state data instead of the physical quantity characteristic data that can be acquired by the power amount measuring means or in addition to the characteristic data.

  According to this configuration, a physical quantity that correlates with the charging of the in-vehicle battery itself, for example, the terminal voltage or charging current of the in-vehicle battery, can be directly grasped on the power supply stand side, and a more accurate charging progress state can be predicted. it can.

  According to the power supply system for an electric vehicle of the present invention, when the on-vehicle battery of the electric vehicle is charged from the power supply stand, the user can be informed of the charging progress state through the terminal.

It is a schematic explanatory drawing of the electric power feeding system which concerns on embodiment of this invention. It is a functional block diagram of the electric power feeding stand used for the system of FIG. It is a functional block diagram of the server used for the system of FIG. It is an example of a charging characteristic data graph, (A) is a relation between charging time and terminal voltage or charging current, (B) is a relation between charging time and charging capacity, and (C) is a relation between charging time and charging power. It is a graph which shows a relationship. It is a flowchart which shows the process sequence using the system of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

[Embodiment 1]
[System configuration]
{Overview}
As shown in FIG. 1, the power supply system 1 for an electric vehicle includes a power supply stand 10 installed in a parking lot such as a monthly parking lot, a terminal 20 used by a user of the stand 10, a power supply stand 10 and a terminal. A server 30 that communicates with each of the devices 20 via a communication network is a main component. The user parks the registered electric vehicle 50 in the parking lot, connects the power supply station 10 and the in-vehicle battery with the charging cable 60, and supplies power to the in-vehicle battery from the power supply station 10 according to a request from the terminal 20 through the server 30. Let The registered electric vehicle 50 is an electric vehicle in which vehicle information is registered in the server 30 together with the user's personal information. The in-vehicle battery is charged with this power supply, and the amount of power required for charging is measured at the power supply stand 10. The measurement result is transmitted from the power supply station 10 to the server 30, and is used for the calculation of the charging progress state in the server 30, and the charge for using the power supply system is calculated based on the amount of electric power when the charging ends. The progress of charging and the usage fee are transmitted to the terminal 20 from the server 30 to inform the user. Hereinafter, the configuration of each unit will be described in detail.

{Power supply stand}
The power supply stand 10 is a device that performs power supply and power supply stop for the in-vehicle battery of the registered electric vehicle 50 and charges the in-vehicle battery at a low speed. In this example, a power supply stand 10 is provided in each of a plurality of parking spaces partitioned in a parking lot, and one of the stands 10 uses a base unit having a communication function with the server 30 and the rest uses a communication function of the base unit. Thus, the slave unit communicates with the server 30. As shown in FIG. 2, the master unit is connected to a low-voltage power source and includes a switch (SW) unit 11, an electric energy measuring unit 12, a stand side communication unit 13, and a stand control unit 14. The slave unit is connected to the master unit via a communication cable, and is configured to use the stand-side communication means 13 of the master unit for communication with the server 30. The configuration of the other slave units is the same as that of the master unit.

<Switching means>
The switch means 11 performs power feeding to the in-vehicle battery according to a request made by the user from the terminal 20 via the server 30, and cuts off the power reception from the electric vehicle 50 side or power feeding from the measurement result of the power amount measuring means 12. Power supply is stopped based on the stop command.

<Electric energy measurement means>
The power amount measuring means 12 measures the amount of power supplied from the power supply stand 10 to the in-vehicle battery. Various known watt-hour meters can be used for measuring the electric energy. For example, as shown in JP-A-2006-258443, the voltage and current of power supplied to the in-vehicle battery from the power supply station 10 are measured, converted into appropriate voltages, and the amount of power is measured. A watt hour meter that converts to a metering pulse is available. The measurement result of this watt-hour meter is transmitted to the server 30 as, for example, OO pulses per 1 kWH.

<Stand side communication means>
The stand side communication unit 13 transmits and receives various data such as a power supply / stop command of the switch unit 11 and a measurement result of the power amount measurement unit 12 to and from the server 30. In this example, a cellular phone network is used for communication between the power supply station 10 and the server 30. Of course, as long as necessary data can be communicated at a practical speed, various communication networks can be used regardless of whether they are wireless or wired. A specific example of wired communication is communication using an optical fiber.

<Stand control means>
The stand control means 14 controls the cooperation of the switch means 11, the electric energy measuring means 12, and the stand side communication means 13 in an integrated manner.

<Others>
In addition, an identification code 15 for specifying the stand 10 is displayed on the power supply stand 10. This identification code 15 is transmitted to the server 30 via the terminal 20 so that the server 30 recognizes from which power supply station 10 power is supplied. In this example, a QR code (registered trademark of DENSO WAVE INCORPORATED) is displayed at an easy-to-see position on the power supply stand 10 to form an identification code 15. Of course, other recognition codes may be used as long as information specifying the power supply station 10 can be displayed.

  Further, the power supply stand 10 is connected to the electric vehicle 50 by lamps (not shown) indicating the operation state of the power supply stand 10, for example, the preparation state, during power supply, and the end of power supply in blue, red, and green, respectively. An outlet 16 for connecting the other end of the charging cable 60 is provided. If necessary, voice guidance may be output from the power supply station 10. For example, depending on the operating state of the power supply stand 10, “Ready. Please connect the charging cord.”, “Charging. Do not remove the charging cord.”, “Charging is finished. "Please remove the charging cord."

  In addition, it is preferable to provide a lock on the power supply stand 10 so that the charging cord cannot be disconnected from the outlet 16 during charging in order to prevent the charging cord from being stolen. This lock is released by termination of power supply or by a request from the terminal 20 to the power supply station 10 via the server 30.

{Terminal}
The terminal device 20 (FIG. 1) is a user-owned device that transmits user input information for making a power supply request to the power supply station 10 to the server 30, and information such as a charging progress state and a system usage fee. Receive from 30. As user input information, a user-specific ID and password are typically used. Such a terminal 20 is provided with user input information input means (not shown), terminal-side communication means (not shown) for communicating with the server 30, and identification code 15 reading means (camera: not shown). Prepare. In this example, a camera-equipped mobile phone is used as the terminal 20, information is transmitted to the server 30 by accessing the mobile site via the Internet, and information is received from the server 30 by e-mail. Done.

{server}
The server 30 is a device that controls the entire power supply system by communicating with each of the power supply station 10 and the terminal 20, and as shown in FIG. 3, a server-side communication means 31, a storage means 32, and a user authentication means 33. , Charging progress state calculation means 34, charge calculation means 35, power supply control means 36, and system control means 39. The statistical processing means 37 will be described later in Modification 1-2 and Modification 2-1, and the battery state determination means 38 will be described later in Embodiment 2.

<Server side communication means>
The server-side communication means 31 transmits / receives necessary information to / from the power supply station 10 via the mobile phone network and to the terminal 20 via the Internet. Examples of the communication network used by the server side communication means 31 include a wireless communication network such as a cellular phone network and a wired communication network such as an optical fiber.

<Storage means>
The storage means 32 stores user master information, battery information including a table, fee information, and stand information. The user master information includes each user's ID, password, personal information (name, address, e-mail address, telephone number, etc.), and vehicle information of the registered electric vehicle 50 (car maker, vehicle type, year, etc.).

  The table stores the correspondence relationship between the registered electric vehicle 50 and the charging characteristic data of the in-vehicle battery of each vehicle. The charging characteristic data includes a charging curve for each vehicle that can be grasped on the power supply stand side during charging. In general, an electric vehicle includes an in-vehicle battery and a charger, and the power supplied from the power supply stand is adjusted and supplied to the in-vehicle battery while monitoring the terminal voltage and the charging current of the in-vehicle battery with the charger. That is, normally, from the power supply stand side, it is impossible to grasp under what conditions the charger supplies power to the in-vehicle battery. However, the charging power of the in-vehicle battery including this charger can be grasped on the power supply stand side. For example, the charger is charging so that the relationship between the terminal voltage or charging current of the in-vehicle battery and the charging time is as shown in FIG. 4A, and the change in battery capacity at that time is shown in FIG. ). In this case, even if the terminal voltage and charging current of the in-vehicle battery cannot be grasped on the power supply stand side, as shown in FIG. 4 (C), the terminal voltage and the charging current are combined and the in-vehicle including the charger is included. If it sees as a charging power curve of a battery, it can grasp | ascertain by the electric power feeding stand side. Therefore, if the correlation between the charging power curve (reference charging power curve) and the battery capacity is stored in a table, the charging power curve of the in-vehicle battery including the charger is regarded as the charging characteristic data of the in-vehicle battery. Thus, it is possible to determine the charging progress state.

  For example, the reference charging power curve may be a charging power curve when an in-vehicle battery in an initial state is charged via the charger. When using the charging stand for the first time, there is no charging history data for the registered electric vehicle 50, but if the charging power curve when charging the in-vehicle battery in its initial state via its charger is used as the reference charging power curve, charging is possible. The reference charging power data can be used from the start of using the stand. Such a charging power curve may be stored in the storage means 32 for each vehicle type, more specifically, for each combination of the in-vehicle battery and the charger. The charging power curve to be stored may be at least the charging power curve of the registered electric vehicle 50, and a charging power curve other than the registered electric vehicle 50 may be stored.

  The fee information includes a unit price for each fee system. The charge system includes electric menus such as electric power from solar power generation and late-night electric power, and a unit price corresponding to the electric menu selected by the user is applied when calculating the usage fee. The stand information is information for specifying the power supply station 10 to be used for charging, and is specifically data that can specify which power supply station 10 in which parking lot.

<User authentication means>
The user authentication unit 33 authenticates the user by referring to the user input information transmitted from the terminal 20 with the user master information read from the storage unit 32. With this user authentication, only authorized users are permitted to use the power supply system 1.

<Charging progress state calculation means>
The charging progress state calculating unit 34 extracts charging characteristic data (reference charging power curve) corresponding to the registered electric vehicle 50 of the authenticated user from the table, and the measurement of the electric energy measuring unit 12 transmitted from the power supply stand 10 The charging progress state of the in-vehicle battery is calculated with reference to the extracted charging characteristic data. For example, the charging power value measured by the power amount measuring means at the power supply stand is differentiated, and the differential value (the slope of the charging power curve) is compared with the reference charging power curve read from the storage means, and the current charging progress state Can be calculated on the reference charging power curve, and the required time from the position on the reference charging power curve to the end of charging can be calculated.

  Further, the time required until the end of charging can be calculated as the charging end time. In addition, since the correspondence relationship between the reference charging power curve and the battery capacity can also be grasped, the time required for the end of charging is calculated, which means how much of the battery capacity has been charged. The charging time can also be calculated as a required time according to the charging rate, such as a required time up to 50% charging rate or a required time up to 80% charging rate. The display form of the calculation result may be selected by the user in advance. The calculation result is transmitted from the server 30 to the user terminal 20 as charging progress state data.

<Price calculation means>
The charge calculating means 35 calculates a charge for using the power supply system 1 based on the amount of power transmitted from the power supply station 10 and the charge information read from the storage means 32. More specifically, for example, the electricity charge used is calculated from the amount of power and the unit price of the charge system selected by the user, and the system usage charge is added to obtain the system usage charge.

<Power supply control means>
The power supply control means 36 specifies the power supply station 10 to be used for charging, and issues a power supply command to the power supply station 10 in response to a request for power supply to the stand 10 via the terminal 20. Control the stop of power supply. The power supply stand 10 is specified by referring to the QR code data read by the terminal 20 with the stand information of the server 30.

<System control means>
The system control means 39 controls each constituent means of the server 30 described above in cooperation. The system control means 39 includes control of a user interface when the terminal 20 accesses the server 30. In this example, when the user accesses the server 30 using the terminal 20, the charging time (1 hour, 8 hours, full charge, etc.) can be selected.

[System procedure]
Next, a processing procedure for operating the above power feeding system will be described based on the flowchart of FIG. In FIG. 5, the flow in the left column shows the processing procedure of the server, the flow in the middle row shows the processing procedure of the power supply station, and the flow in the right column shows the processing procedure of the terminal. A broken-line arrow connecting the flows in each column indicates that data is communicated between the server, the power supply station, and the terminal via the communication network. In the following description, FIGS. 1 to 3 are referred to as necessary for each component of the system.

  (1) First, the user takes a QR code of the power supply station 10 used by the camera of the terminal 20, and accesses the mobile site of the server 30 via the Internet (step Sc1).

  (2) Next, the terminal 20 transmits its own ID and password to the server 30, and user authentication is performed by the user authentication means 33 (step Ss1). At this time, the power supply control means 36 refers to the QR code read data and the stand information of the storage means 32 to cause the server 30 to recognize the power supply stand 10 used for power supply.

  (3) If the user authentication is approved, the authentication OK is notified on the screen of the site accessed by the terminal 20 (step Sc2).

  (4) When the user authentication and the specification of the power supply station 10 are completed, the server 30 transmits a power supply preparation command to the power supply station 10 (step Ss2). In the power supply station 10 that has received the command, for example, a blue lamp indicating a ready state Is lit (step Se1).

  (5) When the power supply stand 10 is in the ready state, the electric vehicle 50 and the power supply stand 10 are connected by the charging cable 60 (step Se2).

  (6) With the terminal 20 connected to the server 30, the user selects a power supply condition such as “1 hour”, “8 hours”, “full charge” from the power supply menu on the site, and requests to start power supply. (Step Sc3).

  (7) When the server 30 receives the power supply start request (step Ss3), it transmits a power supply start command to the power supply stand 10 (step Ss4).

  (8) In response to a request from the server 30, the power supply station 10 starts supplying power to the in-vehicle battery of the registered electric vehicle 50 (step Se3). At that time, in the power supply stand 10, a red lamp indicating that charging is in progress is turned on.

  (9) At the start of power supply, at the power supply stand 10, the power amount is measured by the power amount measuring means 12, and the measurement result is transmitted to the server 30 via the stand side communication means 13 (step Se4).

  (10) The server 30 that has received the measurement result of the electric energy reads the charging characteristic data of the in-vehicle battery corresponding to the registered electric vehicle 50 from the table of the storage unit 32, and refers to this data as the measurement result, thereby proceeding with charging. Calculate the state. Then, the calculation result is transmitted to the terminal 20 via the server side communication means 31 (step Ss5). This transmission is performed by electronic mail.

  (11) The user can grasp the progress of charging by receiving an e-mail at the terminal 20 (step Sc4). For example, “It is about 8 hours until the end of charging.”, “The scheduled end time of charging is AM 6:00 on the XX day.” Or “The required time to charge rate 50% is about 4 hours.” You can be notified. At this stage, if you want to change the charging conditions such as the charging time and the charging rate at the end of charging, display the URL to access the server 30 in the e-mail, so that the user can access the URL from the URL by the terminal 20. The server 30 can be accessed to change the current charging conditions. For example, when the charging rate is initially set to “50%”, but it is desired to change this charging rate to “full charging”, the charging condition can be changed by accessing the server 30 described above. When the charging condition is changed, the fact and the charging progress state corresponding to the changed condition are notified by e-mail.

  (12) The measurement of the amount of power by the power supply station 10 and the calculation of the charging progress state by the server 30 are repeated as necessary, and the charging progress state is notified to the user terminal 20 a plurality of times at appropriate intervals. You may do it.

  (13) In the power supply stand 10, it is determined whether or not the charging of the on-vehicle battery is completed (step Se5). Normally, an electric vehicle has a function of cutting off power reception from the electric vehicle side when charging of the in-vehicle battery is completed. Blocking of power reception from the electric vehicle side (measured electric energy by the electric energy measuring means 12) The charging station 10 can end the charging by turning off the switch means 11 when the charging time selected from the power supply menu elapses or the like.

  (14) When power supply to the in-vehicle battery is stopped and charging is completed, a power supply completion notification is transmitted to the server 30 via the stand side communication means 13 by the stand control means 14 of the power supply stand 10 (step Se6). At that time, in the power supply station 10, a green lamp indicating the end of charging is turned on. The server 30 receives the power supply completion notification from the power supply station 10 (step Ss6).

  (15) In addition, the power consumption until the end of charging is transmitted from the power supply station 10 to the server 30 (step Se7), and the server 30 receives this power consumption (step Ss7).

  (16) The server 30 calculates a usage fee by the fee calculation means 35 based on the received power consumption and the unit price of the fee information read from the storage means 32 (step Ss8).

  (17) At this point, since the process in the power supply station 10 has been completed, the user can remove the charging cord from the power supply station 10 (step Se8).

  (18) On the other hand, the server 30 transmits a charge completion notification to the user terminal 20 by e-mail together with the calculated usage fee (step Ss9).

  (19) By checking the e-mail of the terminal 20, the user can know how much the usage fee was charged with what amount of power usage at the time of charging in addition to the completion of charging ( Step Sc4). At this stage, if the battery capacity is not 100% and further charging is desired, the URL for accessing the server 30 is displayed in the e-mail so that the user can access the server from the URL using the terminal 20. Additional charging can be performed by accessing 30 and setting additional charging conditions. Also in that case, it is notified by e-mail that charging is performed under the additional charging conditions and the charging progress state corresponding to the conditions.

[Function and effect]
According to the above power feeding system, the following operational effects can be achieved.

  Since the server 30 includes the battery information including the table and the charging progress state calculation means 34, it is possible to grasp the accurate charging progress state according to the vehicle-mounted battery of the registered electric vehicle 50 registered in advance in the user master information. .

  The charging power that can be grasped by the power supply stand 10 is regarded as the charging power curve of the in-vehicle battery including the charger, and the charging curve is regarded as the charging curve of the in-vehicle battery. Even if it exists, it can grasp | ascertain the charge condition of a vehicle-mounted battery.

  Since the power supply system performs low-speed charging, it is not necessary to draw in a high-voltage power supply when installing the power supply stand 10, and a power supply system can be constructed by using the low-voltage power supply.

  By using the user authentication means 33, a usage fee can be charged, and unauthorized use of the power supply system can be eliminated.

  When the power supply stand 10 is installed in each of a plurality of parking spaces, any one of them is a master unit having a communication function with the server 30, and the rest is a slave unit that uses the communication function of the master unit. There is no need for the power supply station 10 to have a communication function. Further, it is not necessary to provide the battery information including the table and the charging progress state calculating means 34 in the power supply stand itself. Therefore, the structure of the whole power supply stand can be simplified and the cost can be reduced.

  By providing the power supply stand 10 with a lock mechanism that prevents the removal of the charging cable 60 during power supply, it is possible to ensure the safety of the user and prevent the charging cable 60 from being stolen.

  By installing a power supply station 10 corresponding to the system of the present invention in a monthly parking lot, a parking lot attached to a housing complex such as an apartment, or a parking lot of various commercial facilities, the user has an opportunity to charge the electric vehicle 50. In addition, the charging progress state and usage fee can be grasped even if the charging station 10 is separated.

[Modification 1-1]
As a modification of the first embodiment, the usage fee may be settled with a credit card. In that case, when user authentication is performed (step Ss1 in FIG. 5), credit authentication is performed from the server 30 to the credit company. The usage fee data obtained by the fee calculating means 35 may be transmitted from the server 30 to the credit company together with the user's personal information in step Ss9 of FIG.

[Modification 1-2]
As a modification of the first embodiment, a reference charging power curve may be obtained in consideration of past charging history data. The statistical processing means 37 statistically processes past charging history data. For example, the charging history data is acquired for each vehicle type in which the vehicle battery and the charger are the same, and the charging history data is averaged to obtain reference charging power data for the vehicle type. The charging history data may be stored separately for each aging degree (3 years, 5 years, etc.) of the in-vehicle battery, and the reference charging power data may be calculated for each usage year. The age of the onboard battery can be calculated from the model year.

  In this case, by using the reference charging power data obtained by the statistical processing means, it is possible to calculate the charging progress state more accurately in accordance with the secular change of the in-vehicle battery. Further, variation in charging power for each vehicle can be smoothed by averaging, and more appropriate reference charging power data can be obtained.

[Modification 1-3]
As a modification of the first embodiment, the charge progress status calculating means 34 is used to calculate the amount of power and the charge rate that can be charged in the set time, or by the cooperation between the charge progress status calculating means 34 and the charge calculating means 35, A charge charge may be set first, and the amount of power that can be charged with that charge charge, and further the charge rate that can be reached may be calculated.

  In the former case, for example, a charging time of 1 hour is set. In that case, the terminal 20 accesses the server 30 to set the charging time. The amount of power that can be charged in one hour can be obtained by referring to the reference charging power data. In addition, it is possible to determine how much the charging rate can be increased by referring to the reference charging power data by the amount of power that can be charged in one hour. This is because, as described in the first embodiment, the charging depth of the in-vehicle battery can be predicted by slightly charging the in-vehicle battery. Accordingly, by transmitting this reference result from the server 30 to the terminal 20, it is possible to notify the user via an e-mail or a screen of a mobile site. Specifically, a message such as “1 hour can be used as XX kwH” may be transmitted from the server 30 to the terminal 20.

  In the latter case, for example, how much can be charged for 200 yen is calculated. In that case, first, the charging fee is set from the terminal 20 and transmitted to the server. The server 30 calculates the amount of electric power that can be charged with the set charging charge by dividing the set charging charge (here, 200 yen) by the charge unit price read from the storage means 32. Charge calculation means 35 may be used for this calculation.

  As described in the first embodiment, the charging depth of the in-vehicle battery can be predicted by slightly charging the in-vehicle battery. Therefore, by referring to the amount of power that can be charged at the set charge rate as the reference charging power curve, it is possible to predict how much the charging rate can be further increased and the time required to charge the amount of power. . Therefore, by transmitting the amount of power that can be charged at the set charge rate, the charging rate that can be achieved by charging the amount of power, or the time required to charge the amount of power to the terminal 20 from the server 30, the electronic Users can be notified by e-mail or mobile phone screen. Specifically, the amount of charge at 200 yen will be 8kwH, and it will take about 4 hours. The charging rate when charging is about 70% should be sent from the server to the terminal.

[Modification 1-4]
As described in the first embodiment, since the charging end time can be predicted as the charging progress state, the charging end predicted time for each power supply station 10 is used as the vacant information of the power supply station 10, and the power supply station 1 is to be used from now on. The user can be notified of the vacant information from the server 30 to the terminal 20.

  For example, if the estimated charging end time of a certain power supply station 10 is AM 6:00 on a certain day, it can be understood that the power supply station 10 becomes empty after AM 6:00. For this reason, when a user who intends to use the power supply station 10 accesses the server 30 via the terminal 20 and selects which power supply station group in which region, which power supply station 10 in the power supply station group becomes It is possible to inform the user through the screen of the mobile site whether it is empty at the time. Further, when the server 30 has a reservation system for the power supply station 10, the user who has grasped the available state can also make a reservation for the power supply station 10 using the reservation system as it is.

[Modification 1-5]
The above Embodiment 1 and its modifications are based on the premise that the terminal voltage and charging current of the in-vehicle battery cannot be grasped directly on the power supply stand 10 side. However, if a physical quantity that correlates with charging of the in-vehicle battery, for example, terminal voltage, charging current, battery temperature, etc., can be transmitted from the vehicle side to the power supply stand side using an appropriate wired or wireless communication means, this terminal By storing and using the correlation between the voltage and the charging time, the correlation between the charging current and the charging time, and the like as the charging characteristic data, it is possible to predict the charging progress state with higher accuracy. As the communication means, a stand side communication means can be used.

[Embodiment 2]
In the first embodiment, the charging progress state of the in-vehicle battery can be notified to the user. However, in this example, a power supply system that can also notify the user of the deterioration state of the in-vehicle battery of the registered electric vehicle will be described. The system of this example has the same basic configuration as the system of FIG. 1, and the main difference is that the server includes battery state determination means, and the past charging history data is stored in the storage means. Therefore, the following description will focus on the differences.

[System Overview]
This system stores, for example, past charging history data as one of user master information in the storage means 32, and also includes a battery state determination means 38 as indicated by a broken line frame in FIG. The past charging history data is the measurement result of the amount of power sent from the power supply station 10 (Figs. 1 and 2) to the server 30 (Fig. 1) during past charging of the on-board battery. Correlations are included. On the other hand, secondary batteries generally tend to decrease in battery capacity or increase in battery resistance when the charge / discharge cycle is repeated. If the battery capacity decreases more than a certain level, the battery needs to be replaced. become. For example, if the battery has no deterioration, the displacement of the deteriorated battery may be small even though the displacement of the charging power per unit time is large. Therefore, the battery state determination means 38 determines the deterioration state of the in-vehicle battery by comparing the latest charging history data with the past charging history data and the charging characteristic data of the in-vehicle battery without deterioration (including the reference charging power curve). can do. Specifically, when a deviation exceeding a predetermined allowable range is recognized between the comparison target data, it is determined that the in-vehicle battery has deteriorated, and when the deviation is within the allowable range, it is determined that there is no deterioration. The determination result is also notified by e-mail when the charging end or usage fee is notified via the server side communication means 31 (step Sc4 in FIG. 5). In particular. A message such as "Battery has deteriorated. Please consider replacing it after inspection."

[Function and effect]
According to the embodiment of the present example, the past charging history data is held in the server 30, and the latest charging history data is compared with the past charging history data or the charging characteristic data of the vehicle battery without deterioration. The deterioration state of the battery can be detected. Since the detection state is notified to the user from the server 30 via the terminal 20, the user can know the replacement time of the in-vehicle battery.

[Modification 2-1]
The processing result of the statistical processing means 37 described in Modification 1-2 can also be used to determine the deterioration of the battery state. That is, as in Modification 1-2, the charging history data is acquired for each vehicle model in which the vehicle-mounted battery and the charger are the same, and the charging history data is averaged to obtain reference charging power data for the vehicle model. The charging history data may be stored separately for each aging degree (3 years, 5 years, etc.) of the in-vehicle battery, and the reference charging power data may be calculated for each usage year.

  As in the second embodiment, the battery state determination unit 38 uses the reference charging power data statistically processed by the statistical processing unit 37 as a comparison target with the latest charging history data. Accordingly, it is possible to make a comparative determination as to how much the own vehicle battery has deteriorated as compared with other users of the same vehicle type. Of course, the determination result is sent from the server 30 to the terminal device 20 by e-mail and notified to the user. Alternatively, the determination result can be notified to the user on the screen of the mobile site accessing the server 30.

[Embodiment 3]
In the first embodiment, the power supply target of the power supply system is limited to the registered electric vehicle, but in this example, a power supply system capable of supplying power to an electric vehicle other than the registered electric vehicle will be described. In this example, the basic configuration is the same as that of the system shown in FIG.

[System Overview]
For example, if the user's registered electric vehicle 50 is a Toyota Prius, but you want to charge the Honda Insight vehicle battery owned by a user's friend, the specification of the vehicle battery usually differs depending on the vehicle model, so accurate charging progress In order to grasp the state, charging characteristic data corresponding to the in-vehicle battery to be fed is required.

  In this case, when performing user authentication (step Ss1 in FIG. 5) and the like, it is only necessary to further select a vehicle type to be supplied with power. In general, a driver of an electric vehicle knows the vehicle type of his / her own electric vehicle, but often does not know the type of in-vehicle battery. On the other hand, in the table of the storage means 32, the correspondence relationship between the car type of each car maker including the registered electric vehicle (year if necessary) and the charging characteristic data of the in-vehicle battery of that car type is stored. Thereby, if the user selects a vehicle type to be supplied with power, the charging characteristic data of the in-vehicle battery can be extracted from the table. As a result, the charging characteristic data referred to by the charging progress state calculating means 34 can use appropriate charging characteristic data corresponding to the type of the in-vehicle battery to be fed. Further, by using the battery state determination unit 38 as in the second embodiment and the modified example 2-1, the degree of deterioration of the in-vehicle battery can be evaluated for vehicles other than the registered electric vehicle.

  It should be noted that the charging completion and usage charge notification target person and the usage charge charge target person are performed for registered users. However, if a plurality of e-mail addresses are registered as the user master information and the address of the user's friend can be selected from the plurality of addresses, the person to be notified of the charge termination or usage fee is made the user's friend. It is also possible.

[Function and effect]
According to the embodiment of the present example, the user is limited to the electric vehicle for which the use of the power supply system is permitted, but even if the power supply target is an electric vehicle other than the registered electric vehicle 50, the electric vehicle according to the in-vehicle battery of the electric vehicle Accurate charging progress can be grasped.

  It goes without saying that the present invention is not limited to the above-described embodiment, and can be implemented in various forms without departing from the gist of the present invention. For example, in the first embodiment, one of the power supply stands is a master unit and the rest is a slave unit. However, all of the plurality of power supply stations may be the master unit. The scope of the present invention is defined by the terms of the claims, and includes all modifications within the scope equivalent to the terms of the claims.

  The power supply system of the present invention can be suitably used for the operation of a power supply stand for charging an in-vehicle battery of an electric vehicle.

1 Electric vehicle power supply system
10 Power supply stand
11 Switch means 12 Electric energy measuring means 13 Stand side communication means
14 Stand control means 15 Identification code 16 Outlet
20 terminal
30 servers
31 Server side communication means 32 Storage means 33 User authentication means
34 Charging progress state calculation means 35 Charge calculation means 36 Power supply control means
37 Statistical processing means 38 Battery status judgment means 39 System control means
50 electric vehicle
60 Charging cable

A power supply system for an electric vehicle according to the present invention includes a power supply stand for supplying power to an in-vehicle battery of the electric vehicle, and a server that communicates with each of the power supply stand and a terminal used by a user of the power supply stand via a communication network. Is provided. The power supply stand includes switch means for supplying power to the in-vehicle battery in response to a request from the terminal via the server, and power amount measuring means for measuring the amount of power supplied to the in-vehicle battery. The server includes a storage unit, a user authentication unit, and a charging progress state calculation unit. The storage means includes user master information and a table for identifying the user and the registered electric vehicle. The table associates the registered electric vehicle with the characteristic data of the physical quantity that can be acquired by the electric energy measuring means, which is the charging characteristic data of the in-vehicle battery. The user authentication means authenticates the user with reference to the user input information transmitted from the terminal and the user master information. Then, the charging progress state calculation means extracts charging characteristic data corresponding to the registered electric vehicle of the authenticated user from the table, and the charging characteristic obtained by extracting the measurement data of the electric energy measuring means transmitted from the power supply stand The charging progress state of the in-vehicle battery is calculated with reference to the data, and the calculation result is generated as charging progress state data for transmitting to the terminal.

[Embodiment 1]
[System configuration]
{Overview}
As shown in FIG. 1, the electric vehicle power supply system 1 includes a power supply stand 10 installed in a parking lot such as a monthly parking lot, and a terminal 20 used by a user of the power supply stand 10 and the user of the power supply stand 10. A server 30 that communicates with each other via a communication network is a main component. When using this power supply system 1, the user holds the terminal 20 , parks the registered electric vehicle 50 in the parking lot, connects the power supply stand 10 and the in-vehicle battery with the charging cable 60, and from the terminal 20 In response to a request through the server 30, the vehicle-mounted battery is supplied with power from the power supply stand 10. The registered electric vehicle 50 is an electric vehicle in which vehicle information is registered in the server 30 together with the user's personal information. The in-vehicle battery is charged with this power supply, and the amount of power required for charging is measured at the power supply stand 10. The measurement result is transmitted from the power supply station 10 to the server 30, and is used for the calculation of the charging progress state in the server 30, and the charge for using the power supply system is calculated based on the amount of electric power when the charging ends. The progress of charging and the usage fee are transmitted to the terminal 20 from the server 30 to inform the user. Hereinafter, the configuration of each unit will be described in detail.

Claims (8)

A power supply stand for supplying power to the vehicle-mounted battery of the electric vehicle;
A terminal used by a user of the power supply stand;
A server that communicates with each of the power supply station and the terminal via a communication network;
The power supply stand is
In response to a request from the terminal via the server, switch means for supplying power to the in-vehicle battery,
Having an electric energy measuring means for measuring the electric energy supplied to the in-vehicle battery,
The server
A table for associating user master information for identifying the user and the registered electric vehicle, and characteristic data of the physical quantity that can be acquired by the electric energy measuring means, which is charging characteristic data of the registered electric vehicle and the in-vehicle battery. Storage means having
User authentication means for authenticating a user with reference to the user input information transmitted from the terminal and the user master information;
Charging the vehicle battery by extracting charging characteristic data corresponding to the registered electric vehicle of the authenticated user from the table and referring to the measurement data of the electric energy measuring means transmitted from the power supply stand with the extracted charging characteristic data A power supply system for an electric vehicle, comprising: a charge progress state calculation unit that calculates a progress state and generates charging progress state data for transmitting the calculation result to a terminal.   The charging progress state data is at least one of a charging end time, a required time until the charging ends, a charging rate with respect to the battery capacity, a charging end time according to the charging rate, and a required time until the charging ends according to the charging rate. The power supply system for an electric vehicle according to claim 1, wherein the power supply system is an electric vehicle. The storage means stores the charge history data measured by the power amount measuring means in the past power supply by the user,
Furthermore, the server compares the latest charging history data with the past charging history data and the charging characteristic data of the in-vehicle battery without deterioration, thereby determining the deterioration state of the in-vehicle battery, and transmits the determination result to the terminal. The power supply system for an electric vehicle according to claim 1, further comprising: a battery state determination unit that generates as determination result data for performing the operation. The server includes statistical processing means for statistically processing the charging history data measured by the power amount measuring means in the past power supply for each vehicle type of the registered electric vehicle,
4. The electric vehicle according to claim 1, wherein the charging progress state calculating unit uses charging history data statistically processed by the statistical processing unit as the extracted charging characteristic data. 5. Power supply system. The server includes statistical processing means for statistically processing the charging history data measured by the power amount measuring means in the past power supply for each vehicle type of the registered electric vehicle,
The power supply system for an electric vehicle according to claim 3, wherein the battery state determination unit uses the charging history data statistically processed by the statistical processing unit as a comparison target with the latest charging history data. The storage means further stores charging characteristic data of an electric vehicle other than the registered electric vehicle,
The charging progress state calculating means extracts charging characteristic data corresponding to the electric vehicle selected from the table via a terminal when the electric vehicle to be fed is different from the registered electric vehicle. The electric vehicle power supply system according to any one of claims 1 to 5.   The power supply system for an electric vehicle according to any one of claims 1 to 6, wherein the charging characteristic data is a charging curve indicating a relationship between charging time and charging power. The power supply stand includes a stand side communication means for receiving a physical quantity correlated with the charge of the in-vehicle battery transmitted from the registered vehicle side,
The charging progress state calculation means uses the physical quantity as charging progress state data instead of the physical quantity characteristic data that can be acquired by the power amount measuring means or in addition to the characteristic data. The power feeding system for an electric vehicle according to any one of 1 to 6.

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