JP5503997B2 - Electric vehicle power supply system, electric vehicle power supply method, and electric vehicle power supply program - Google Patents

Description

  The present invention relates to a power supply system for an electric vehicle, a power supply method for an electric vehicle, and a power supply program for an electric vehicle that notify a user of the electric vehicle at a remote location of the end of charging in advance.

  Conventionally, as one of countermeasures against environmental problems such as deterioration of the global environment, there is a growing demand for the spread of electric vehicles that do not emit carbon dioxide. An electric vehicle does not have a so-called internal combustion engine that obtains power by burning gasoline or the like, and obtains power by rotating a motor with electric power of a battery (battery). For this reason, the battery needs to be charged for running the electric vehicle. Since there is a limit on the distance that can be traveled by one charge, there is a possibility that the vehicle cannot travel to the destination even if 100% is charged at the departure point. Therefore, in order to popularize electric vehicles, installation of a power supply stand (or charging stand) is being promoted.

  Generally, a power supply station supplies electric power to a battery mounted on an electric vehicle and performs charging. However, charging an electric vehicle battery requires several hours or more. For this reason, the user wants to leave the electric vehicle during charging and return to the electric vehicle at the time of completion of charging or when sufficient charging is performed for the time being, for example, after taking a break or shopping. Therefore, it is preferable that the user can be notified of the charging status of the electric vehicle during or after the charging of the battery for the electric vehicle. Preferably, in order to minimize the waiting time of the user, it is preferable to notify that charging will be completed soon before charging ends or before the charging capacity desired by the user is reached.

  As an example of a power supply system for notifying a user of a charging status, in Patent Document 1, a charging monitor device installed in an elevator parking device acquires charging information such as an estimated end time, and passes through a line called a monitor line. A method is disclosed in which charging is transmitted to a centralized management apparatus, and a user accesses the centralized management apparatus from a portable terminal or a dedicated remote controller to check charging information.

Further, in Patent Document 2, the charger state transmission means is provided inside the charger, and the charger state transmission means transmits information such as the voltage, temperature, remaining capacity, and charging time of the battery of the electric vehicle to the management center via the network. A process is disclosed in which a user accesses a management center with a portable terminal and acquires data such as a charging status of an electric vehicle.
JP 2001-359203 A JP 2002-123888 A

  However, in the electric vehicle power supply system disclosed in Patent Document 1, the user knows the battery charging status of the electric vehicle with a monitor mounted on the electric vehicle. That is, the user must go back to the electric car to know the charging status. In other words, while charging the electric vehicle, there is a problem that the user cannot leave the electric vehicle, take a break or shopping, and then return to the electric vehicle just after charging. It was.

  In addition, in the electric vehicle power supply system of Patent Document 2, it is said that the user can know the charging status by accessing the management center, but in order to grasp the remaining capacity and charging time of the battery of the electric vehicle. No specific means are disclosed.

  Generally, when charging is performed, the electric vehicle and the power feeding system are connected only by a power line that supplies a charging current, and other communication lines for control signals are not connected. On the other hand, when the remaining capacity is 0% at the start of charging, and when the remaining capacity is 50%, the time required to complete charging differs. The power feeding system only supplies current, and cannot receive control signals and the like from the electric vehicle. Therefore, since the power feeding system cannot acquire the initial remaining capacity at the start of charging, as a result, the expected end time of charging cannot be calculated.

  Therefore, the conventional power supply system cannot detect the charging state in the middle, and thus cannot properly notify the user. For example, even if the user can go home with 80% charge, the user has to wait until full charge. In other words, there is a problem that it is impossible to make a notification that meets the needs of the user.

  Therefore, in order to solve the above problem, the present invention can notify a user of an electric vehicle at a remote location in advance of the end of charging, and can accurately grasp the charging status in the middle of the user's needs. It is an object to provide a power supply system for an electric vehicle, a power supply method for an electric vehicle, and a power supply program for an electric vehicle that can make a notification suitable for the above.

Accordingly, the present invention provides a power supply system for an electric vehicle including a power supply stand for charging a battery mounted on the electric vehicle, the user information acquiring means for acquiring user information of the electric vehicle, and the power to the battery. Charging power supply means for supplying the battery, charging status detection means for detecting at least two power value changes specific to the battery when the charging power supply means is charging the battery, and the detected power A notification means for notifying a user based on user information obtained by the user information acquisition means based on a change in value, and a change in power value specific to the battery detected at the at least two locations Includes a reduction in charging current caused by switching of the charging circuit and a reduction in charging current caused by charging saturation .

  Furthermore, the present invention is characterized in that the charging status detection means detects a decrease in charging current caused by circuit switching and a decrease in charging current caused by charging saturation as changes in the power values at the two locations.

  Furthermore, the present invention is characterized in that it detects that the charging current has become zero as a third power value change in addition to the two power value changes.

  Furthermore, the present invention is characterized in that the user information acquisition means acquires the user information from an information management server via a network.

  Furthermore, the present invention is characterized by further comprising travel distance calculation means for calculating a travelable distance per unit of the electric vehicle and calculating a travelable distance by applying a correction coefficient according to the environment.

  Furthermore, the present invention is characterized by further comprising battery abnormality detection means for detecting an abnormality of the battery based on a change in the power value of the at least two places detected by the charging state detection means.

Furthermore, the present invention provides a power supply method for an electric vehicle for charging a battery mounted on the electric vehicle, the user information acquiring step for acquiring user information of the electric vehicle, and the charging for supplying electric power to the battery. A power supply step; a charge state detection step of detecting at least two power value changes inherent to the battery when the charging power supply step is charging the battery; and a change in the detected power value. Based on the user information obtained by the user information acquisition step, and a notification step for notifying the user, a change in the power value specific to the battery detected in the at least two locations is a charging circuit. It includes a reduction in charging current caused by switching and a reduction in charging current caused by charging saturation .

Furthermore, the present invention is an electric vehicle power supply program for charging a battery mounted on an electric vehicle, the user information acquiring step for acquiring user information of the electric vehicle, and the charging for supplying electric power to the battery A power supply step; a charge state detection step of detecting at least two power value changes inherent to the battery when the charging power supply step is charging the battery; and a change in the detected power value. Based on the user information obtained by the user information acquisition step, causing the computer to execute a notification step of notifying the user, and there is a change in the power value specific to the battery that detects the at least two locations. Further, the present invention is characterized in that it includes a reduction in charging current caused by switching of the charging circuit and a reduction in charging current caused by charging saturation .

  ADVANTAGE OF THE INVENTION According to this invention, the completion | finish of charge can be notified in advance to the user of the electric vehicle in a distant place. Therefore, during charging of the electric vehicle, after the user leaves the electric vehicle and takes a break or shopping, the user can return to the electric vehicle as soon as charging is finished. Since full charge is approaching, at least two or more changes in the power value specific to the battery are detected, so that full charge can be accurately detected.

  Further, according to the present invention, since the travelable distance is notified to the user rather than the charging rate, it is not necessary for the user to wait until the battery is fully charged, and charging is terminated when the necessary travelable distance is reached. And the user can minimize waiting time. Further, since the travelable distance is subjected to a correction coefficient according to the situation, the user can know a more realistic and reliable travelable distance.

1 is a diagram showing an overall configuration of an electric vehicle power supply system according to a first embodiment of the present invention. It is a figure which shows the structure of the electric power feeding stand of this invention. It is a flowchart which shows operation | movement of 1st Embodiment. It is a graph which shows the change of charge electric power of a 1st embodiment. It is a table | surface which shows the contact address of the user of 1st Embodiment. It is a figure which shows the structure of the electric power feeding stand in the electric power feeding system for electric vehicles which is 2nd Embodiment of this invention. It is a flowchart which shows operation | movement of 2nd Embodiment.

(First embodiment)
Hereinafter, a power supply system for an electric vehicle according to the present invention will be described in detail. FIG. 1 shows an overall configuration of an electric vehicle power supply system according to a first embodiment of the present invention.

  The electric vehicle power supply system 101 includes a power supply station 11, an information management center 12 (information management server), a short-range wireless communication network 13, the Internet 14, and a user portable terminal 17. The user performs charging by connecting his / her own electric vehicle 15 to the power supply station 11.

  The power supply stand 11 supplies electric power to the electric vehicle through the power supply line 16. The power supply station 11 is connected to the information management center 12 through the wireless communication network 13 and the Internet 14.

  The information management center 12 has a user database 12a and manages information about users. In the user database 12a, user information necessary for charging the electric vehicle is registered in advance. The information management center 12 communicates with the power supply station 11 via the Internet 14 and also communicates with the user's mobile terminal 17. Specifically, the information management center 12 searches the user database, identifies the user of the corresponding electric vehicle, and periodically provides information on charging to the user by a notification means such as an e-mail. .

  The wireless communication network 13 is a wireless communication network using a short-range wireless communication standard for home appliances such as ZigBee (registered trademark). The wireless communication network 13 is connected to the Internet 14 using a ZigBee relay terminal (not shown) as a gateway. The mobile terminal 17 is an information terminal carried by the user, and is a mobile phone or a smartphone. The electric vehicle 15 includes a battery, for example, a lithium ion battery, for providing driving power.

  In FIG. 2, the structure of the electric power feeding stand 11 in 1st Embodiment of this invention is shown. The power supply stand 11 includes a charging state detection unit 21, a charging information transmission unit 22, an IC card reader 23, and a charging power supply unit 24.

  When charging a lithium ion battery mounted on an electric vehicle, the charging status detection unit 21 measures the rate of change of electric energy according to the characteristics, grasps the charging status, and calculates the charging rate and expected charging end time. To do. The charging information transmission unit 22 supplies the charging information such as the charging rate and the estimated charging end time calculated by the charging status detection unit together with other electric vehicle specific information (for example, vehicle type, serial number, mileage, etc.) to the information management center 12. Is transmitted through the antenna 25. The IC card reader 23 is an example of a vehicle information acquisition unit. For example, the user reads personal information of the user by bringing the non-contact IC card closer to the user. The charging power supply unit 24 supplies power to the electric vehicle through the power supply line 16.

  Next, the operation of the electric vehicle power supply system 101 according to the first embodiment of the present invention will be described. FIG. 3 is a flowchart showing the operation of the first embodiment of the present invention.

  First, in step 301, the user holds his / her IC card over the IC card reader 23 of the power supply stand 11 and reads the information. The IC card reader 23 reads user information written in advance on the IC card. The read user information includes authentication information for security in addition to information for identifying the user. The charging information transmission unit 22 transmits the read user information from the antenna 25 to the wireless communication network 13. A ZigBee relay terminal (not shown) transmits user information to the information management center 12.

  In step 302, the information management center 12 performs authentication based on the authentication information, and searches for user information from the user database 12a. Specifically, contact information such as personal information such as the user's name, vehicle type and model of the electric vehicle, credit card number required for charging, and e-mail address are extracted from the user database 12a.

  In step 303, the information management center 12 notifies the power supply station 11 again through the Internet 14 and the wireless communication network 13 that necessary user information has been extracted. The power supply stand 11 displays a message indicating that the user has been authenticated and a message that the power supply line 16 should be connected. The user connects the power supply line 16 to the electric vehicle by seeing this display.

  In step 304, the power supply stand 11 detects that the power supply line 16 is connected, and then starts charging. When charging is started, the charging state detection unit 21 of the power supply station 11 continuously monitors the current value flowing into the electric vehicle. FIG. 4 is a graph showing changes in the power value from the start of charging to full charging along the time axis. As an example, the power supply stand 11 of this embodiment takes about 231 minutes to fully charge. Needless to say, the time required to fully charge varies depending on the type and model of the battery installed in the electric vehicle, and also varies depending on the model of the power supply stand and the charging method.

  For example, when charging is started, the power value indicates 1.40E + 01 kW, and remains constant (400 in FIG. 4). However, since the power supply stand 11 and the electric vehicle 15 are connected only by the power supply line 16 and no other control lines are connected, information such as the remaining battery capacity cannot be obtained from the electric vehicle 15.

  In step 305, the power value decreases rapidly, and after about 3 minutes, returns to 1.40E + 01 kW again (reference numeral 401 in FIG. 4). When the power supply station 11 detects this rapid decrease, in step 306, the power supply station 11 notifies the information management center 12 to that effect. Note that the rapid decrease and rapid recovery of the power value are phenomena inherent to the type of electric vehicle and the mounted battery. Specifically, the charge controller in the electric vehicle activates the overcharge protection function and prevents the charging circuit from continuing to charge the battery. is there. That is, the relative position between the remaining capacity of the rapid decrease and the sudden recovery being zero and the full charge differs depending on the design of the battery and the control circuit.

  In general, the sudden decrease in the power value is caused by switching of the control circuit in preparation for full charge, and thus occurs when full charge is approaching. Note that the sudden decrease in the power value occurs not only by switching the control circuit but also by switching the control mode. The sudden decrease in the power value is one of the changes in the power value inherent to the battery, but includes all changes in the power value based on the control switching before reaching the state of charge saturation. Therefore, the change in the power value is not limited to abrupt, and may be a gradual decrease.

  In step 307, the information management center 12 that has received the notice of the rapid decrease in the electric power value identifies the type of battery corresponding to the type and model of the electric vehicle from the user information, and based on the identified type, The charging rate at the time of the rapid decrease is calculated. For example, the information management center 12 determines that the current charging rate is 80%.

  In step 308, the information management center 12 sends an email to the email address that is the contact information of the user found in step 302. The content of the e-mail is, for example, “Current charging rate is 80%. Charging will soon be completed”. FIG. 5 shows an example of contact information for each user. For example, in the case of a person whose user name is “XXX”, the user authentication number is AAA001, and the mail address of the personal computer and the mail address of the mobile phone are registered in advance. Similarly, mail addresses are registered for other users. When the information management center 12 transmits a mail, the user receives this mail at the portable terminal 17. At this time, the user leaves the electric vehicle, is taking a break or shopping, and when receiving a mail, the user starts returning to the electric vehicle. Depending on the type of battery, the aforementioned sudden decrease in the power value is not a sign of near full charge. For example, when the charging rate indicates 50%, the information management center 12 sets the current charging rate to 50%. In accordance with this determination, an e-mail may be sent with the content “Current charging rate is 50%. Currently charging”. In this case, the notification by e-mail is not a notification for notifying full charge, but the user can grasp the progress of charging. Note that the sudden decrease in the power value may be a notification corresponding to the charge rate other than 80% or 50%.

  In this embodiment, the user is notified by e-mail, but may be notified by a short message such as SMS. If it is a short message which can be transmitted to a mobile phone number, the time lag until reception is small and notification can be performed reliably.

  In step 309, the power value starts to gradually decrease to approach charging saturation (402 in FIG. 4). When the power supply station 11 detects this gradual decrease, it notifies the information management center 12 to that effect. Note that the gradual decrease in the electric power value is a phenomenon that occurs when full charge is approaching, and occurs at a different reduction rate depending on the type of electric vehicle and the mounted battery.

  In step 311, the information management center 12 that has received the notification of the gradual decrease in the power value specifies the charging rate at the start of the gradual decrease. For example, the information management center 12 determines that the current charging rate is 90%. Here, in this embodiment, the information management center 12 does not refer to the user information, and determines that it is 90% when a gradual decrease starts. This is because it is known that the gradual decrease in the power value is a charging rate of approximately 90% although there is a slight difference depending on the type of battery or electric vehicle. Therefore, the electric vehicle is referred to the user database 12a. This is because there is sufficient accuracy without considering the model year and the type of battery. Note that user information may be referred to when a charging rate with higher accuracy is required.

  In step 312, the information management center 12 transmits an email to the email address that is the contact information of the user searched in step 302. The content of the email is, for example, “Current charging rate is 90%. Full charge is approaching.” The user receives this mail at the portable terminal 17. At this time, the user is heading to the electric vehicle by the first notification, and it is assumed that the user is approaching the electric vehicle considerably at the time of the second notification.

  In step 313, the power value becomes almost zero. At this point, the battery is fully charged. Even if the battery is fully charged, constant power flows to the control circuit. When the power supply station 11 detects zero power value, it notifies the information management center 12 in step 314.

  In step 315, the information management center 12 that has received the notification that the electric power value is zero determines that the electric vehicle is fully charged. Here, the information management center 12 refers to the information on the type of electric vehicle and the type of battery in the user information, and changes in the three power values detected so far (abrupt decrease, moderate decrease, Determine whether there is an abnormality in the battery from the time and numerical value of (zero). At this time, the server of the information management center functions as battery abnormality detection means. For example, if the interval from a sudden decrease in power value to a gradual decrease is short, if the slow decrease in power value is too rapid, the battery may be abnormal or the characteristics may have changed due to aging. is assumed. In such a case, it is determined that there is an abnormality in the battery. On the other hand, in view of the type of the electric vehicle and the type of the battery, if the timing and the numerical value with the appropriate change in the power value at three locations are detected, it is determined that the battery is normal.

  In step 316, the information management center 12 transmits an email to the email address that is the contact information of the user searched in step 302. The content of the email is, for example, “Fully charged”. If it is determined that the battery is abnormal, the information management center 12 also notifies the battery abnormality. In this case, the content of the e-mail is, for example, “There may be a problem with the battery. Check it immediately.”

  The user receives this mail at the portable terminal 17. At this time, the user has reached the electric vehicle and confirms from his mail that his electric vehicle is fully charged. Then, the power supply line 16 is disconnected, and the electric vehicle 15 is boarded to start running.

  As described above, according to the electric vehicle power supply system 101 according to the first embodiment of the present invention, it is possible to notify the user of the electric vehicle at a remote location of the end of charging in advance. Therefore, during charging of the electric vehicle, after the user leaves the electric vehicle and takes a break or shopping, the user can return to the electric vehicle as soon as charging is finished.

  Moreover, according to the electric vehicle power supply system 101 according to the first embodiment of the present invention, it is detected that at least two or more changes in the power value specific to the battery are approaching full charge. Can be detected with high accuracy. In the first embodiment of the present invention, at least two changes in the power value are detected. However, depending on the type of battery, there may be a case where the change in the power value occurs many times. In this case, all changes in the power value may be detected, or some of them may be detected, and the charging state corresponding to the detected change in the power value is notified. Depending on the type of battery, there may be no sudden decrease in power value in the process up to full charge, but step S305 and step S306 are skipped, and only a gradual decrease in power value is detected and notified. You may make it perform.

(Second Embodiment)

  Then, the electric vehicle electric power feeding system which is 2nd Embodiment of this invention is demonstrated. The second embodiment has the same overall configuration as the first embodiment shown in FIG. In FIG. 2, the structure of the electric power feeding stand 11 of the electric power feeding system for electric vehicles which is 2nd Embodiment is shown. In the first embodiment, the user is notified at every constant charging rate as the battery approaches full charge. However, there are cases where the user wants to know the travelable distance rather than the charging rate. For example, when the distance from the power supply stand to the target point (for example, home) is a short distance, there is no need to wait until the battery is fully charged. Time can be minimized. In the second embodiment, the user is notified at a fixed timing as the travelable distance approaches the set value.

  As in the first embodiment, the power supply station 11 includes a charging status detection unit 21, a charging information transmission unit 22, an IC card reader 23, and a charging power supply unit 24. Furthermore, a travel distance calculation unit 61 The vehicle information acquisition unit 62 is provided.

  The vehicle information acquisition unit 62 acquires vehicle information from information read from the IC card reader 23 and also acquires information input directly from the user. The travel distance calculation unit 61 calculates the travelable distance per unit of the electric vehicle, applies a correction coefficient according to the travel state, and not the electric vehicle manufacturer's published value or best effort value, but the external environment of the electric vehicle. A more realistic travelable distance is calculated in consideration of

  Next, the operation of the electric vehicle power supply system according to the second embodiment of the present invention will be described. FIG. 7 is a flowchart showing the operation of the second embodiment of the present invention.

  First, in step 701, the vehicle information acquisition unit 62 acquires information on the electric vehicle connected to the charging station 11 through the power supply line 16. Specifically, the user directly connects the input device (not shown) of the power supply station 11 to the type of electric vehicle, the current charging rate, the desired number of mileage, and the mobile phone number that the user brings. Enter.

  In the case where the electric vehicle is a vehicle type that supports power line communication, for example, PLC (Power Line Communication) or PLT (Power Line Telecommunication), the vehicle information acquisition unit 62 acquires vehicle information from the electric vehicle through the power supply line 16. To do. In this case, the information to be acquired includes the charging rate, the travel distance, the model and model of the electric vehicle, the model and model number of the battery, and the like.

  In addition, when the electric vehicle is equipped with Wi-Fi certified communication equipment, the vehicle information acquisition unit is performed by wireless communication using IEEE 802.11 (eg, IEEE 802.11a / IEEE 802.11b). 62 acquires vehicle information from the electric vehicle through the power supply line 16. In this case, the information to be acquired includes the charging rate, the travel distance, the type and model of the electric vehicle, the model year / model number of the battery, etc., as in the case of using the PLC.

  If the electric vehicle is not compatible with PLC or Wi-Fi, the user inserts his IC card into the IC card reader 23 of the power supply stand 11 and reads the information. As in the first embodiment, the charging information transmission unit 22 transmits user authentication information to the information management center and receives vehicle information from the information management center.

  In the second embodiment, the acquisition of vehicle information includes four means of direct input, PLC, Wi-Fi, and provision from the information management center, but any one or all of them may be provided. You may have.

  In step 702, the travel distance calculation unit 61 calculates a travelable distance per charging rate% (hereinafter referred to as a travelable distance per unit) from the acquired vehicle information. Specifically, the travel distance calculation unit 61 first specifies the travelable distance per standard unit based on the model / year of the electric vehicle and the model / model of the battery. The travelable distance per standard unit is a value specific to the type of electric vehicle, and is a standard value provided by the manufacturer of the electric vehicle.

  The travel distance calculation unit 61 multiplies the obtained travelable distance per standard unit by a traffic environment coefficient that is an example of a correction coefficient. The traffic environment coefficient is the local environment where the power supply station 11 is installed, for example, whether it is a cold or warm area, a congested area or a non-congested area, an urban area, or a local area. This is a coefficient indicating the influence of factors such as For example, in the case of a combination of a cold district, a traffic jam area, and an urban area, the travelable distance per standard unit is shortened, so the traffic environment coefficient is a numerical value of 1 or less. On the other hand, the traffic environment coefficient is a numerical value of 1 or more for a combination of a warm area, a non-congested area, and a local area.

  Subsequently, the travel distance calculation unit 61 multiplies the obtained travel distance per standard unit by a current situation coefficient that is an example of a correction coefficient. The current situation coefficient is a coefficient indicating the influence of the current date, time, temperature, weather, and the like. For example, in the case of a combination of weekday, evening, low temperature, and bad weather, the travelable distance per standard unit is shortened, so the current situation coefficient is a numerical value of 1 or less. Conversely, if the combination is a holiday, midnight, high temperature, and good weather, the current situation coefficient is a numerical value of 1 or more.

  When vehicle information is obtained by PLC or Wi-Fi, the mileage calculation unit 61 can grasp the detailed situation of the electric vehicle, and therefore applies other correction factors. For example, when the user's driving method tends to have poor fuel consumption based on the user's driving history, a correction coefficient corresponding to the driving method is applied. In addition, when it is estimated from the user's operation history that the battery has changed over time, a coefficient corresponding to the change over time is applied. On the other hand, when there is a history of replacing the battery with a new one, the standard value is used as it is without applying a coefficient corresponding to the secular change.

  In step 703, the power supply station 11 starts charging. When charging is started, the charging state detection unit 21 of the power supply station 11 continuously monitors the current value flowing into the electric vehicle. At this time, the travel distance calculation unit 61 updates the travelable distance as the charging rate is updated.

  In step 704, the charging status detection unit 21 detects the charging rate, and based on this, the travel distance calculation unit 61 calculates the travelable distance. However, the charging information is obtained every certain distance, for example, every 10 kilometers. The transmission unit 22 sends a short message to the user in response to the user's mobile phone number. As an example, the content of the e-mail to be transmitted is “I can travel another 50 kilometers”. Further, charging is continued, and the content of the next e-mail to be transmitted is, for example, “You can travel another 60 kilometers”.

  Instead of a short message, an e-mail may be transmitted from the information management center as in the first embodiment, or an e-mail may be transmitted from a management server that manages a plurality of power supply stations 11. . In this case, the contact e-mail may be read from the user's IC card or extracted from the user database of the information management center based on the vehicle information.

  Subsequently, in step 705, when the calculated travelable distance reaches 90% of the travelable distance desired by the user, in step 706, the charging information transmitting unit 22 determines the mobile phone number of the user. Send short messages to users. The content of the e-mail to be sent is, for example, “You can travel 90 kilometers. Charging will soon reach the desired mileage.”

  Subsequently, in step 707, when the calculated travelable distance reaches the travelable distance desired by the user, in step 708, the charging information transmitting unit 22 sends a short message to the user's mobile phone number. Send to users. The content of the e-mail to be sent is, for example, “You can travel another 100 kilometers. You have reached the desired mileage.”

  Although not included in FIG. 7, if the user does not return to the electric vehicle after that, the same notification as in the first embodiment may be performed before the battery is fully charged. For example, notification may be made when a sudden decrease in power value is detected, further notification may be made when a gentle decrease in power value is detected, and notification may be made when the power value is zero.

  Thus, according to the second embodiment of the present invention, the user is notified of the travelable distance rather than the charging rate, so the user does not need to wait until full charge, and when the necessary travelable distance is reached. In addition, charging can be terminated and the user can minimize waiting time. Further, since the travelable distance is subjected to a correction coefficient according to the situation, the user can know a more realistic and reliable travelable distance.

  In addition, although embodiment mentioned above demonstrated the case where the electric vehicle electric power feeding system was implemented by cooperation with the electric power feeding stand 11 and the information management center 12, this invention is not limited to this, The electric power feeding stand 11 and Needless to say, the information management center 12 can be directly connected.

DESCRIPTION OF SYMBOLS 11 Power supply stand 12 Information management center 15 Electric vehicle 17 Portable terminal 21 Charging condition detection part 22 Charging information transmission part 23 IC card reader 24 Charging power supply part 61 Travel distance calculation part 62 Car information acquisition part 101 Electric vehicle power supply system

Claims (7)

An electric vehicle power supply system including a power supply station for charging a battery mounted on the electric vehicle,
User information acquisition means for acquiring user information of the electric vehicle;
Charging power supply means for supplying power to the battery;
When the charging power supply means is charging the battery, charging status detection means for detecting at least two changes in the power value specific to the battery;
A notification means for notifying a user based on the user information obtained by the user information acquisition means based on the detected change in the power value ;
A change in electric power value specific to the battery detected at least two places includes a reduction in charging current caused by switching of a charging circuit and a reduction in charging current caused by charge saturation. Power supply system.   2. The electric vehicle power supply system according to claim 1, wherein in addition to the change in the power value at the two locations, the change in the third power value is detected to detect that the charging current has become zero.   The power supply system for an electric vehicle according to claim 1, wherein the user information acquisition unit acquires the user information from an information management server via a network.   2. The electric vehicle for an electric vehicle according to claim 1, further comprising travel distance calculating means for calculating a travelable distance per unit of the electric vehicle and calculating a travelable distance by applying a correction coefficient according to an environment. Power supply system.   2. The electric vehicle for an electric vehicle according to claim 1, further comprising battery abnormality detection means for detecting abnormality of the battery based on a change in the power value of the at least two places detected by the charging state detection means. Power supply system. An electric vehicle power supply method for charging a battery mounted on an electric vehicle,
A user information acquisition step of acquiring user information of the electric vehicle;
A charging power supply step for supplying power to the battery;
When the charging power supply step is charging the battery, a charging state detection step of detecting at least two changes in the power value specific to the battery;
A notification step of notifying the user based on the user information obtained by the user information acquisition step based on the detected change in the power value ;
A change in electric power value specific to the battery detected at least two places includes a reduction in charging current caused by switching of a charging circuit and a reduction in charging current caused by charge saturation. Power supply method. An electric vehicle power supply program for charging a battery mounted on an electric vehicle,
A user information acquisition step of acquiring user information of the electric vehicle;
A charging power supply step for supplying power to the battery;
When the charging power supply step is charging the battery, a charging state detection step of detecting at least two changes in the power value specific to the battery;
Based on the detected change in the power value, let the computer execute a notification step of notifying the user based on the user information obtained by the user information acquisition step ,
A change in electric power value specific to the battery detected at least two places includes a reduction in charging current caused by switching of a charging circuit and a reduction in charging current caused by charge saturation. Power supply program.

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