Vehicle, power supply device, notification system, and notification method

Abstract

The present disclosure relates to a vehicle, a power supply device, a notification system, and a notification method. The vehicle is provided with an electrical storage device and a control device. The vehicle is configured to be able to charge the electrical storage device using electric power supplied from a power supply device of a time-based charging system. The control device of the vehicle is configured to calculate a charging amount unit price that represents a charging cost per unit charging amount using device information related to the power supply device and information of the electrical storage device, and to notify a user terminal of information related to the calculated charging amount unit price.

Description

Technical Field

[0001] This disclosure relates to vehicles, power supply equipment, notification systems, and notification methods. Background Technology

[0002] Japanese Patent Application Publication No. 2013-122676 discloses a time-based charging power supply device (more specifically, a charging station). This power supply device is installed in parking lots that charge by the hour. The control device (more specifically, a payment machine) described in Japanese Patent Application Publication No. 2013-122676 calculates parking fees based on time. Furthermore, when the vehicle's battery storage device senses that charging has been performed through the aforementioned power supply device, the control device switches from a charging system that only charges parking fees (time-based charging) to a charging system that requests charging fees in addition to parking fees (time-based charging).

[0003] In vehicles equipped with energy storage devices, the rated charging power (maximum charging power) of the energy storage device is mostly disclosed through technical specifications made available to the user. However, sometimes the charging power is limited by the power supply equipment and / or the vehicle during charging. The details of the charging control that includes such charging limitations may vary depending on the type of power supply equipment. The details of the charging control implemented by the vehicle may also vary depending on the vehicle model. Furthermore, the details of the charging control implemented separately by the power supply equipment and the vehicle (e.g., control logic) are mostly kept black-box and not visible from the outside. It is assumed that even if the details of the charging control are disclosed, users may not easily and correctly understand them.

[0004] As mentioned above, the charging speed of an energy storage device may vary with each charge due to factors unknown to the user (e.g., the aforementioned charging limitations). Nevertheless, notification technologies for informing users of information related to charging speed have not been adequately studied in the past. Summary of the Invention

[0005] This disclosure was made to address the aforementioned problems, and its purpose is to provide vehicles, power supply equipment, notification systems, and notification methods that can appropriately inform users of information related to charging speed.

[0006] The vehicle shown below is provided in accordance with the first viewpoint of this disclosure.

[0007] (First item) The vehicle is equipped with an energy storage device and a control device. The vehicle is configured to charge the energy storage device using electricity supplied from a time-based charging facility. The control device is configured to use equipment information related to the power supply facility and information about the energy storage device to calculate a charging unit price representing the charging cost per unit of charge, and to notify the user terminal of information related to the calculated charging unit price.

[0008] In time-based charging systems, charging fees are determined based on charging time. Users of time-based charging systems tend not to be aware of the unit price per unit of charge. However, when charging speed (i.e., the amount of energy charged per unit time) decreases due to charging limitations, the unit price per unit of charge increases. The amount of energy charged represents the electrical energy input into the energy storage device through that charging. Furthermore, the unit price per unit of charge functions as an indicator of the economic efficiency of that charging. Charging with a lower unit price per unit of charge is considered more economical.

[0009] In charging of energy storage devices using time-based charging equipment, the unit price of charging may vary depending on the charging speed. However, the aforementioned vehicle can inform the user of information related to the unit price of charging by having a function to calculate it. Therefore, the user can easily understand the economics of charging (unit price of charging) and choose to charge accordingly.

[0010] It should be noted that the unit price per charge is an example of "information (or parameters) related to charging speed." The higher the charging speed, the lower the unit price per charge.

[0011] The vehicle described in the first item above may have the configuration described in any one of the second to sixth items shown below.

[0012] (Second item) In the vehicle described in the first item, the information related to the unit price of charging quantity indicates at least one of the factors that increase the unit price of charging quantity and the method of reducing the unit price of charging quantity.

[0013] Based on the aforementioned vehicles, users can understand at least one of the factors contributing to higher charging unit prices and methods to reduce them. This makes it easier for users to implement cost-effective charging practices.

[0014] (Third item) In the vehicle described in the first or second item, the equipment information represents the output power of the power supply equipment and the charging cost.

[0015] Based on the above configuration, the vehicle can easily obtain appropriate charging speed and unit price per charge. The output power of the power supply equipment easily affects charging limits. Specifically, the higher the output power of the power supply equipment, the easier it is to enforce charging limits. Moreover, the more the charging power is limited, the lower the charging speed. In addition, the charging cost affects the unit price per charge. The vehicle's control unit can use the charging amount detected on the vehicle side and the charging cost obtained from the power supply equipment to calculate the unit price per charge.

[0016] (Fourth item) In any of the vehicles described in items one through three, the information of the energy storage device indicates the SOC (State of Charge) and capacity of the energy storage device.

[0017] Based on the above configuration, the vehicle can easily obtain appropriate charging speed and unit price per charge. The increase in the State of Charge (SOC) of the energy storage device during charging corresponds to the amount of charge. The higher the SOC of the energy storage device at the start of charging, the easier it is to enforce charging restrictions. Furthermore, the smaller the capacity of the energy storage device, the easier it is to enforce charging restrictions. The vehicle's control unit can use the capacity of the energy storage device to determine the amount of charge or the SOC of the energy storage device.

[0018] (Fifth item) In any of the vehicles described in items one through four, the user terminal is an on-board terminal mounted on the vehicle or a portable terminal carried by the user of the vehicle.

[0019] Based on the above configuration, users can easily confirm the content notified to the user terminal from the control device as early as possible.

[0020] (Sixth) In the vehicle described in any one of the first to fifth items, the control device is configured to use equipment information and information about the energy storage device to obtain a mapping diagram representing the relationship between a first indicator related to the power supply equipment, a second indicator related to the energy storage device, and a unit price for charging. The control device is configured to determine a performance range and a target range in the mapping diagram, wherein the performance range represents the first and second indicators of charging that have been performed, and the target range represents the first and second indicators of the unit price for charging becoming lower than a predetermined value. Furthermore, the control device is configured to notify the user terminal of at least one of the factors that cause the unit price for charging to increase and the method of reducing the unit price for charging when the target range does not include the performance range.

[0021] Based on the above structure, vehicles can easily identify at least one of the factors contributing to increased charging unit prices and methods for reducing charging unit prices by comparing and analyzing the target range and the actual range. This improves the accuracy of the notification.

[0022] The power supply equipment shown below is provided in accordance with the second aspect of this disclosure.

[0023] (Seventh) The time-based charging power supply equipment has a control device. The control device is configured to perform the following actions: obtain information from the vehicle about the energy storage device installed in the vehicle; and use the obtained information about the energy storage device and equipment information related to the power supply equipment to calculate a charging unit price representing the charging cost per unit of charging, and notify the user terminal of information related to the calculated charging unit price.

[0024] The aforementioned power supply equipment can inform users of information related to the unit price of charging by calculating the unit price of charging. As a result, users can easily understand the economic benefits of charging (unit price of charging) and choose to charge accordingly.

[0025] The notification system shown below is provided in accordance with the third aspect of this disclosure.

[0026] (Eighth item) The notification system includes a notification device that notifies a user terminal of first charging information related to the charging of a battery storage device installed in the vehicle. The notification device is configured to: acquire second charging information representing the relationship between a first indicator, a second indicator, and a third indicator; and notify the user terminal of the first charging information based on the second charging information. The first indicator is an indicator related to the power supply equipment supplying power to the battery storage device. The second indicator is an indicator related to the battery storage device. The third indicator represents a parameter related to the charging speed of the battery storage device.

[0027] In the aforementioned notification system, the notification device has the function of acquiring second charging information representing the relationship between the first and third indicators. Therefore, it is easy to obtain parameters related to the charging speed of the energy storage device based on the second charging information, and it is also easy to notify the vehicle's user terminal of the first charging information related to the charging of the energy storage device based on these parameters. Thus, the user can easily perform charging at an appropriate speed.

[0028] It should be noted that the first indicator may be an indicator that affects the degree (e.g., frequency or intensity) of charging restrictions enforced by the power supply equipment, or it may be an indicator related to at least one of the technical specifications and condition of the power supply equipment. The second indicator may be an indicator that affects the degree (e.g., frequency or intensity) of charging restrictions enforced by the vehicle, or it may be an indicator related to at least one of the technical specifications and condition of the energy storage device.

[0029] (Item 9) In the notification system described in Item 8, the first indicator represents the rated output of the power supply equipment to the energy storage device for charging. The second indicator represents the State of Charge (SOC) of the energy storage device when charging begins.

[0030] Based on the above configuration, the notification device can easily obtain second charging information that appropriately specifies the third indicator. The higher the rated output of the power supply equipment, the easier it is to enforce charging restrictions. Furthermore, the higher the State of Charge (SOC) of the energy storage device at the start of charging, the easier it is to enforce charging restrictions. Moreover, the more the charging power is restricted, the lower the charging speed.

[0031] (Item 10) In the notification system described in Item 9, the parameter associated with the charging speed of the energy storage device is a first parameter that decreases as the charging speed of the energy storage device increases. The notification device is configured to perform the following actions: using second charging information to determine a first indicator and a second indicator that the first parameter becomes smaller than a first reference value; and notifying the user terminal of the first charging information based on the determined requirements.

[0032] (Eleventh item) In the notification system described in the ninth item, the parameter associated with the charging speed of the energy storage device is a second parameter that increases as the charging speed of the energy storage device increases. The notification device is configured to perform the following actions: using second charging information to determine a first indicator and a second indicator that the second parameter becomes larger than a second reference value; and notifying the user terminal of the first charging information based on the determined requirements.

[0033] The notification device described in each of the tenth and eleventh items above can determine the requirements of a first and a second indicator that the charging speed is sufficiently high. Then, the notification device notifies the user terminal of first charging information (information related to the charging of the energy storage device) based on the determined requirements. Thus, the user can easily perform charging at an appropriate speed. Specifically, charging restrictions implemented by the power supply equipment and / or vehicle are mostly implemented to protect specific components (e.g., the energy storage device). In the case where the charging speed is reduced due to charging restrictions, it is possible to impose excessive load on other components (charging-related components) in order to protect the aforementioned specific components. Regarding this, according to the above configuration, notification is performed based on the requirements of a first and a second indicator that the charging speed is sufficiently high. With such notification, it is easy to perform charging of the energy storage device under conditions where the load on the charging-related components is reduced (at a sufficiently high charging speed). Therefore, deterioration and failure of the charging-related components are suppressed.

[0034] It should be noted that, as an example of the first parameter, the unit price of charging can be mentioned above. As an example of the second parameter, charging speed (the amount of charging per unit time) can be mentioned.

[0035] (Item 12) In the notification system described in Item 10 or Item 11, the notification device is configured to update second charging information using the rated output of the power supply equipment, the state of charge (SOC) of the energy storage device at the start of charging, and the electrical energy input to the energy storage device during charging, after charging of the energy storage device has been performed by the power supply equipment. Furthermore, the notification device is configured to notify the user terminal of first charging information indicating that the charging of the energy storage device has not met at least one of the first and second indicators.

[0036] The aforementioned notification system can easily obtain second charging information that matches the various characteristics of the vehicle and its user through post-charging update processing. Furthermore, the user can easily charge the energy storage device in a manner that satisfies both the first and second criteria.

[0037] (Item 13) In the notification system described in any one of items 10 to 12, the notification device is configured to determine whether the power supply equipment reserved through the user terminal meets the requirements of the first indicator and the second indicator. Furthermore, the notification device is configured to notify the user terminal of a suggested change to the reservation if the reserved power supply equipment does not meet at least one of the first and second indicators.

[0038] Based on the above configuration, the user can confirm whether the reserved power supply equipment meets the requirements of both the first and second indicators. Then, the user can easily perform charging of the energy storage device that meets the requirements of both the first and second indicators based on the above recommendations.

[0039] (Item 14) The notification system described in any one of items 10 to 13 further includes a user terminal. The user terminal is configured to display on a map, based on the first charging information being notified, one or more power supply devices that meet the requirements of the first criterion and power supply devices that do not meet the requirements of the first criterion.

[0040] Based on the above configuration, users can easily distinguish between power supply equipment that meets the requirements of the first indicator and power supply equipment that does not meet the requirements of the first indicator.

[0041] The notification method is provided in accordance with the fourth aspect of this disclosure, as shown below.

[0042] (Item 15) The notification method for notifying the user terminal of the energy storage device includes the first and second processes as shown below. In the first process, the computer device uses information related to the time-based charging equipment and information related to the energy storage device that has been charged by electricity supplied from the power equipment to calculate a charging unit price representing the charging cost per unit of charging. In the second process, the computer device notifies the user terminal of information related to the calculated charging unit price.

[0043] The above methods can also inform users about the unit price of charging. As a result, users can easily understand the economic benefits of charging (unit price of charging) and choose to charge accordingly.

[0044] It should be noted that the aforementioned computer device can be a fixed computer device, a computer device mounted on a mobile body (car, rail vehicle, ship, airplane, drone, robot, etc.) equipped with the aforementioned power storage device, a computer device built into a mobile terminal, or a computer device in the cloud.

[0045] The above and other objects, features, aspects, and advantages of the invention will become apparent from the following detailed description relating to the invention, taken in conjunction with the accompanying drawings. Attached Figure Description

[0046] Figure 1 This is a diagram showing the configuration of a power supply system according to an embodiment of the present disclosure.

[0047] Figure 2 It means Figure 1 The diagram shows the composition of the vehicle.

[0048] Figure 3 This is a functional block diagram of the control device of the notification system in this embodiment.

[0049] Figure 4 This is a flowchart illustrating the first notification method of this embodiment.

[0050] Figure 5 This is a diagram used to illustrate the charging control for each charging condition.

[0051] Figure 6 This is the first example of a graph representing the unit price mapping of charging quantity.

[0052] Figure 7 This is the second example of a graph representing the unit price mapping of charging quantity.

[0053] Figure 8 It means Figure 6 The diagram shows a variation of the unit price mapping of charging quantity.

[0054] Figure 9 It means Figure 7 The diagram shows a variation of the unit price mapping of charging quantity.

[0055] Figure 10 It means Figure 8 The diagram shown is an example of the performance range and target range of the mapping.

[0056] Figure 11 It means Figure 9 The diagram shown is an example of the performance range and target range of the mapping.

[0057] Figure 12 It means responding to Figure 4 The image shown is an example of a screen displayed in response to the first notification.

[0058] Figure 13 It means responding to Figure 4 The image shown is a diagram of the first screen displayed in response to the second notification.

[0059] Figure 14 It means through the Figure 13 The image shown is a diagram of the screen displayed based on the operation of the screen shown.

[0060] Figure 15 It means responding to Figure 4 The second notification shown is displayed on the second screen.

[0061] Figure 16 This is a flowchart illustrating the second notification method of this embodiment.

[0062] Figure 17 It means responding to Figure 16 The image shown is an example of a screen displayed in response to a notification.

[0063] Figure 18 This is the first example of a charging speed mapping diagram.

[0064] Figure 19 It means Figure 18 The diagram shown is an example of the performance range and target range of the mapping.

[0065] Figure 20 This is the second example of a charging speed mapping diagram.

[0066] Figure 21 It means Figure 20 The diagram shown is an example of the performance range and target range of the mapping.

[0067] Figure 22 This is a diagram showing a modified example of a power supply device.

[0068] Figure 23 This is a flowchart illustrating the charging control of a modified example.

[0069] Figure 24 This is a flowchart representing the notification method of a variant example.

[0070] Figure 25 It means having Figure 3 The diagram shows the cloud server that provides the notification function.

[0071] Figure 26 It means having Figure 22 The diagram shows the server for the notification function. Detailed Implementation

[0072] The embodiments of this disclosure will be described in detail with reference to the accompanying drawings. In the drawings, the same or equivalent parts are labeled with the same reference numerals and their descriptions will not be repeated.

[0073] Figure 1 This is a diagram illustrating the schematic configuration of the power supply system and vehicle according to an embodiment of this disclosure. (See also...) Figure 1The power supply system in this embodiment includes a power system (PG), multiple electric vehicle supply equipment (EVSEs) connected to the power system (PG) (including EVSE20A and EVSE20X), and a server 100 that manages these EVSEs. EVSE stands for Electric Vehicle Supply Equipment.

[0074] A power system PG is a power grid constructed from transmission and distribution equipment. Multiple power plants (not shown) are connected to the power system PG. The power system PG receives power from these power plants. In this embodiment, the power system PG supplies AC power (e.g., single-phase or three-phase AC power). Each of the multiple EVSEs included in the above power supply system is configured to receive AC power from the power system PG and output DC power.

[0075] Vehicle 10 is configured to utilize each of the multiple EVSEs included in the aforementioned power supply system. For example, EVSE 20A is a charging station equipped with a control unit 21, a circuit unit 22, and a charging cable 23. The control unit 21 includes a processor 21a and a storage device 21b. The circuit unit 22 includes a switching circuit (not shown) and a power conversion circuit (e.g., an inverter). The charging cable 23 has a connector 24 (plug) at its tip and internally includes communication lines and power lines. A single cable can serve as both a communication line and a power line.

[0076] Vehicle 10 has an inlet 13 for attaching and detaching the connector 24. By connecting the connector 24 to the inlet 13 of vehicle 10 in a parked state, EVSE 20A is electrically connected to vehicle 10 via charging cable 23. The circuit section 22 of EVSE 20A is controlled by control section 21. During power supply from EVSE 20A to vehicle 10, control section 21 connects the switching circuit, converting AC power supplied from the power system PG to circuit section 22 into DC power via a power conversion circuit. This DC power is then output to charging cable 23 and input to inlet 13 of vehicle 10. It should be noted that... Figure 1 Only the inlet 13 corresponding to DC (direct-current) charging is shown, but the vehicle 10 may also have an inlet and charger (power conversion circuit) corresponding to AC (alternating-current) charging. Furthermore, the location of the inlet (charging port) is arbitrary. The inlet can be located on any of the following surfaces of the vehicle body: front, rear, left, right, top, or bottom.

[0077] Vehicle 10 also includes an ECU 50. ECU stands for Electronic Control Unit. ECU 50 includes a processor 51 and a storage device 52. The storage device 52 is configured to store information. In this embodiment, various controls in ECU 50 (e.g., charging and discharging control of battery 11) are executed by the processor 51 executing a program stored in the storage device 52. In addition to storing the aforementioned program, the storage device 52 also stores pre-stored technical specifications information (e.g., capacity) of battery 11.

[0078] Vehicle 10 also includes an HMI (Human Machine Interface) 80. The HMI 80 includes an input device 81 and an output device 82. The input device 81 accepts input from the user (e.g., operation of the control unit or voice input). The input device 81 outputs a signal corresponding to the user's input to the ECU 50. The input device 81 may also include a recognition device for recognizing the user's state. The recognition device may include a camera that acquires images of the vehicle interior. When the recognition device recognizes a specified sign made by the user (e.g., a V-sign), it outputs a signal corresponding to the recognized sign from the HMI 80 to the ECU 50. With such a recognition device, the user can operate the in-vehicle equipment using only signals. The output device 82 outputs (reports) information to the user via display or sound (including voice) according to instructions from the ECU 50. The output device 82 may also include a display device and a speaker. Examples of display devices include a central display, an instrument panel, and a head-up display. The display device and speaker can be oriented according to instructions from the ECU 50. HMI 80 may also include a touch panel display. The touch panel display serves as both an input device 81 and an output device 82.

[0079] The mobile terminal 30 is configured to wirelessly communicate with the ECU 50. The mobile terminal 30 is carried and transported by the user of the vehicle 10. In this embodiment, a smartphone with a touch panel display is used as the mobile terminal 30. The smartphone has a built-in computer, camera, microphone, and speaker. Prescribed application software (hereinafter referred to simply as "application") is installed on the mobile terminal 30. The mobile terminal 30 exchanges information with the vehicle 10 through the aforementioned application. It should be noted that the mobile terminal 30 is not limited to a smartphone. For example, a laptop computer, tablet computer, wearable device (smartwatch, smart glasses, smart clothing, etc.), or electronic key may also be used as the mobile terminal 30.

[0080] The HMI80 (in-vehicle terminal) and the mobile terminal 30 (portable terminal) function as user terminals in the vehicle 10. Furthermore, the ECU 50 of the vehicle 10 is configured to communicate with the control unit 21 of the EVSE20A. The ECU 50 can communicate with the control unit 21 via the charging cable 23. The ECU 50 can also communicate wirelessly with the control unit 21. Additionally, the mobile terminal 30 is also configured to communicate with the EVSE20A (control unit 21). The mobile terminal 30 can communicate with the EVSE20A via a server 100 that manages the EVSE20A. The EVSE20A can also be a public EVSE. Examples of public EVSEs include EVSEs installed in commercial facilities, car dealerships, or parking areas along highways.

[0081] The above description provides an example of the configuration of the EVSE included in the power supply system of this embodiment. The number of EVSEs included in the power supply system is arbitrary; it can be greater than or equal to 2 and less than 50, greater than or equal to 50 and less than 300, or greater than or equal to 300. The power supply system of this embodiment includes multiple EVSEs with different rated outputs. Specifically, regarding the rated output of these EVSEs, the minimum rated output is "20kW" and the maximum rated output is "90kW". Furthermore, each EVSE included in the power supply system is a time-based charging device. Therefore, each EVSE charges vehicle users who utilize the power supply device a charging fee corresponding to the charging time.

[0082] Figure 2 This is a diagram showing the configuration of vehicle 10. (For example...) Figure 2 As shown, vehicle 10 also includes a navigation system (hereinafter also referred to as "NAVI") 70 and a communication device 90. The communication device 90 includes various communication interfaces (I / F). ECU 50 and NAVI 70 communicate with external devices of vehicle 10 via the communication device 90. The communication device 90 may include communication I / Fs for wired communication with the EVSE connected to vehicle 10. Furthermore, the communication device 90 may also include, for example, a wireless communication device such as a DCM (Data Communication Module). In this embodiment, the input device 81 and output device 82 mounted on vehicle 10 function as input and output devices for NAVI 70, respectively. Furthermore, Figure 1 The mobile terminal 30 shown can also function as an input and output device for NAVI70 by wirelessly communicating with NAVI70 via communication device 90.

[0083] The NAVI70 has a built-in computer. In addition, it has a storage device for storing map information. The NAVI70 uses a positioning system such as GPS (Global Positioning System) to sequentially detect the position of vehicle 10 and outputs the detected position to an output device (e.g., output device 82 or mobile terminal 30). Thus, the output device displays the position of vehicle 10 on a map in real time. Referring to the map information, the NAVI70 searches for the best route (e.g., the shortest route) from the current position of vehicle 10 to a destination or for power supply equipment that meets specified conditions, and outputs the search results to the output device. The output device then outputs the search results via display or sound. The NAVI70 can update map information via OTA (Over-The-Air).

[0084] Vehicle 10 also includes a battery 11, an SMR (System Main Relay) 12, a charging relay 15, a MG (Motor Generator) 20, and a PCU (Power Control Unit) 22. Vehicle 10 is configured to operate using the electricity stored in the battery 11. Known vehicle energy storage devices can be used as the battery 11. Examples of known vehicle energy storage devices include liquid secondary batteries, solid-state secondary batteries, and battery packs. Examples of vehicle secondary batteries include lithium-ion batteries and nickel-metal hydride batteries. Vehicle 10 is, for example, a battery electric vehicle (BEV) without an internal combustion engine. However, it is not limited to this; vehicle 10 can also be a PHEV (Plug-In Hybrid Electric Vehicle) with an internal combustion engine, or other electric vehicles (xEVs).

[0085] The vehicle 10 also includes a monitoring module 11a for monitoring the state of the battery 11. The monitoring module 11a includes various sensors (e.g., voltage sensor, current sensor, and temperature sensor) for detecting the state of the battery 11, and outputs the detection results to the ECU 50.

[0086] Vehicle 10 is configured to perform external charging. External charging is the charging of an on-board energy storage device (e.g., battery 11) using power from outside the vehicle. Charging relay 15 switches the connection / disconnection of the circuit from inlet 13 to battery 11. SMR 12 switches the connection / disconnection of the circuit from battery 11 to PCU 22. During external charging, charging relay 15 and SMR 12 are both set to the closed state (connected state). When external charging is not performed, charging relay 15 is set to the open state (disconnected state). SMR 12 and charging relay 15 are controlled by ECU 50. In external charging, for example... Figure 1 The DC power output from the EVSE20A shown is input to inlet 13 and then to battery 11 via charging relay 15 and SMR 12. In this embodiment, a charging cable including inlet 13 and charging relay 15 is connected between SMR 12 and PCU22. However, this is not a limitation; a charging cable can also be connected between battery 11 and SMR 12.

[0087] SMR12 is also switched off while vehicle 10 is in motion. PCU22 uses power supplied from battery 11 to drive MG20. MG20 functions as a driving motor. PCU22 includes, for example, an inverter, and is controlled by ECU50. MG20 is driven by PCU22, causing the drive wheels of vehicle 10 to rotate. Furthermore, MG20 performs regenerative power generation and outputs the generated power to battery 11. It should be noted that the number of driving motors in vehicle 10 is arbitrary. The driving motors can also be in-wheel motors.

[0088] Figure 3 This is the functional block diagram of ECU50. (For example...) Figure 3 As shown, the ECU 50 has a unit P1 and a notification unit P2 related to the charging diagnostic function. Unit P1 acquires information related to the power supply equipment (hereinafter referred to as "device information") and information related to the battery 11 (hereinafter referred to as "battery information"). Specifically, unit P1 includes a power detection unit P11, a power measurement unit P12, and a diagnostic unit P13. The power detection unit P11, the power measurement unit P12, the diagnostic unit P13, and the notification unit P2 can be implemented by programs within the processor 51 and the storage device 52, respectively, or they can be implemented by dedicated hardware (e.g., electronic circuits).

[0089] The power detection unit P11 acquires battery information (e.g., current and voltage) representing the state of the battery 11 from the monitoring module 11a. Then, the power detection unit P11 acquires the input and output power of the battery 11 based on the current and voltage of the battery 11. The power detection unit P11 sequentially acquires the charging power (input power) during the charging of the battery 11. The input and output power of the battery 11 is equivalent to an example of battery information.

[0090] The power measurement unit P12 obtains the input and output power of the battery 11 within a specified period based on the input and output power obtained by the power detection unit P11. Furthermore, the power measurement unit P12 obtains the capacity of the battery 11 from the storage device 52, and obtains the State of Charge (SOC) based on the capacity of the battery 11 and the input and output power. The capacity of the energy storage device (e.g., battery 11) represents the electrical energy that can be stored in the energy storage device, specifically equivalent to the electrical energy stored in the energy storage device in a fully charged state. SOC represents the charge rate. The charge rate is, for example, expressed as 0 to 100% as the ratio of the current stored capacity to the stored capacity in a fully charged state. The input and output power, capacity, and SOC of the battery 11 are each examples of battery information.

[0091] The energy measurement unit P12 obtains the charge amount of battery 11 by accumulating the input power (charging power) of battery 11. The charge amount of battery 11 is equivalent to the input energy of battery 11 during the period from the start of charging to the end of charging. In addition, the energy measurement unit P12 obtains the state of charge (SOC) of battery 11 at the start of charging. The energy measurement unit P12 also obtains the SOC of battery 11 sequentially during charging.

[0092] The diagnostic unit P13 obtains battery information (e.g., the charge level and SOC of battery 11) from the power measurement unit P12. Furthermore, the diagnostic unit P13 reads the technical specifications of battery 11 from the storage device 52. The technical specifications of battery 11 are also an example of battery information.

[0093] The diagnostic unit P13 acquires the EVSE's technical specifications (e.g., rated output) and cost information (e.g., unit price). In this embodiment, the diagnostic unit P13 obtains information from the EVSE connected to the vehicle 10 (e.g., via a communication device 90). Figure 1 The EVSE20A shown receives the technical specifications and cost information of the EVSE. However, it is not limited to this; the diagnostic unit P13 can also receive the technical specifications and cost information of the EVSE from the server 100 that manages the EVSE via the communication device 90. The rated output of the EVSE indicates the maximum power that the EVSE can output, specifically equivalent to the maximum output power of the EVSE in design. The technical specifications and cost information of the EVSE are examples of equipment information.

[0094] The diagnostic department P13 uses the aforementioned device and battery information to calculate the unit price of charging and requests notification from the notification department P2 regarding information related to the calculated unit price of charging. The unit price of charging represents the cost per unit of charging. The charging cost can be expressed in general currency (legal tender) or virtual currency. Furthermore, the charging cost can also be expressed in points that can be exchanged for specified goods or services. In this embodiment, an example of expressing the charging cost in Japanese legal tender (yen) is shown (see below). Figure 5 ).

[0095] For example, the diagnostic unit P13 determines whether the unit price of the charge is higher than the benchmark value and requests notification of the result of the determination from the notification unit P2. Furthermore, if it is determined that the unit price of the charge is higher than the benchmark value, the diagnostic unit P13 uses the aforementioned equipment information and battery information to determine the factors contributing to the higher unit price of the charge and methods for reducing the unit price of the charge, and requests notification of the determined factors and methods from the notification unit P2.

[0096] The notification unit P2 sends a notification requested from the diagnostic unit P13 to the user terminal (e.g., at least one of HMI80 and mobile terminal 30).

[0097] Figure 4 This is a flowchart illustrating the first notification method of this embodiment. For example, at the timing of starting external charging of battery 11, ECU 50 executes processing flow F1. ECU 50 may also start processing flow F1 when it receives a charging start notification from EVSE connected to vehicle 10. "S" in the flowchart refers to a step.

[0098] In processing flow F1, ECU 50 obtains, for example, the technical specifications (including rated output) and cost information (including charge unit price) of the target device from the target device via wired communication in S11. The target device is the EVSE connected to the vehicle 10. The target device can send its technical specifications and cost information to ECU 50 in response to a request from ECU 50.

[0099] Next, in S12, ECU 50 performs charging control of battery 11 while acquiring and storing battery information related to battery 11. Specifically, ECU 50 acquires battery information indicating the state of battery 11 based on the output from monitoring module 11a. Battery information includes, for example, charging power, input energy, and state of charge (SOC). Charging power is acquired by power detection unit P11. Furthermore, input energy and SOC are acquired by energy measurement unit P12.

[0100] ECU50 works in conjunction with the EVSE's control unit to perform charging control of battery 11. For example, in the target device is Figure 1In the case of the EVSE20A shown, the ECU50 calculates a target value for the current or power of the battery 11 (hereinafter referred to as the "charging target value") and sends this charging target value to the control unit 21. Thus, the ECU50 requests charging from the control unit 21 according to the charging target value. The control unit 21 controls the circuit unit 22 based on the charging target value received from the ECU50. The control unit 21 adjusts the power supplied from the EVSE20A to the inlet 13 (and thus to the battery 11) via the circuit unit 22.

[0101] When the ECU 50 does not limit the charging power, it sets a target charging value such that the charging power of the battery 11 is the same as the rated output of the target device (EVSE20A). When the ECU 50 limits the charging power, it sets a target charging value such that the charging power of the battery 11 becomes less than the rated output of the target device. The ECU 50 can limit the charging power, for example, to suppress the degradation of the battery 11. The ECU 50 can also limit the charging power based on the SOC of the battery 11 to suppress overcharging of the battery 11. On the other hand, in the EVSE20A, when the control unit 21 does not limit the charging power, it controls the circuit unit 22 such that the current or power of the battery 11 is close to the target charging value. When the control unit 21 limits the charging power, it limits the current or power of the battery 11 to a value less than the target charging value via the circuit unit 22. The control unit 21 can also limit the charging power, for example, to suppress overheating of the device within the EVSE20A.

[0102] Next, in S13, ECU 50 determines whether a predetermined time (e.g., 30 minutes) has elapsed since the start of charging of battery 11. If the predetermined time has not elapsed since the start of charging ("No" in S13), ECU 50 determines in S14 whether battery 11 is in a fully charged state. If the state of charge (SOC) of battery 11 reaches 100%, ECU 50 determines that battery 11 is in a fully charged state. During the period when both S13 and S14 are determined to be "No", the processes of S12 to S14 are repeated. The charging of battery 11 is performed through the process of S12, and the state of battery 11 during charging (e.g., charging power, input power, and SOC) is stored in storage device 52.

[0103] If battery 11 reaches a fully charged state before the predetermined time elapsed since the start of charging (marked as "Yes" in S14), process F1 ends. Conversely, if battery 11 does not reach a fully charged state after the predetermined time elapsed since the start of charging, the condition is "Yes" in S13, and processing proceeds to S15. Thus, charging of battery 11 ends. A condition of "Yes" in S13 means that charging of battery 11 has been performed for the predetermined time.

[0104] In S15, ECU50 updates the charge quantity unit price mapping map using the device information obtained in S11 and the battery information obtained in S12. The charge quantity unit price mapping map represents the relationship between a first indicator related to the power supply equipment, a second indicator related to the battery 11, and the charge quantity unit price (third indicator). In this embodiment, the first indicator represents the rated output of the EVSE (time-based power supply equipment) included in the power supply system described above. The second indicator represents the SOC of the battery 11 at the start of charging. Hereinafter, the SOC at the start of charging will also be referred to as the "charging start SOC".

[0105] Next, in S16, ECU50 determines the actual range and target range in the charge unit price mapping diagram. In this embodiment, the actual range represents the first and second indicators of the charging performed in S12. The target range represents the first and second indicators of the charge unit price becoming lower than a predetermined value (hereinafter referred to as the "baseline unit price").

[0106] Next, in S17, ECU50 determines whether the target range includes the actual performance range by comparing the actual performance range and the target range determined in S16.

[0107] The following uses Figures 5-11 The processing of S15 to S17 is explained.

[0108] Figure 5 This is a diagram illustrating the charging control for each charging condition. Figure 5 In this context, t1 and t2 represent the charging start time and charging end time, respectively. The external charging of battery 11 performed by the target device begins at t1 and ends at t2.

[0109] Line L1 indicates the state of charge (SOC) progression of battery 11 under the first charging condition. Under this condition, the rated output of the device is "50kW", the initial SOC is "15%", and the charging time is "30 minutes". Furthermore, the charging rate for the device is "100 yen / minute" (time-based rate), and the cost for 30 minutes of charging is "3000 yen". Line L1 indicates a charging capacity of "25kWh" and a charging speed (charged per hour) of "25kW". Therefore, the charging rate per unit is "120 yen / kWh" (=3000 yen / 25kWh).

[0110] Line L2 indicates the shift in the State of Charge (SOC) of battery 11 under the second charging condition. The second charging condition is identical to the first charging condition, except that the SOC changes from "15%" to "75%" at the start of charging. The charging amount shown by line L2 is "5 kWh". Therefore, the unit price for charging is "600 yen / kWh" (=3000 yen / 5 kWh).

[0111] Line L3 indicates the state of charge (SOC) progression of battery 11 under the third charging condition. The third charging condition is the same as the first charging condition, except that the rated output of the target device is "90kW" and the charging rate is "170 yen / minute" (time-based rate). Higher-specification power supply equipment (e.g., high-output power supply equipment) is more likely to be charged at a higher rate. Figure 5 The charging timer shown in t2A indicates that the charging limit is in effect. The charging capacity shown in line L3 is "25kWh". The cost for 30 minutes of charging is "5100 yen". Therefore, the unit price of charging is "204 yen / kWh" (=5100 yen / 25kWh).

[0112] Line L4 indicates the state of charge (SOC) of battery 11 being charged under the fourth charging condition. The fourth charging condition is the same as the first charging condition, except that the rated output of the target device is "25kW". The charging amount shown by line L4 is "12.5kWh". Therefore, the unit price for charging is "240 yen / kWh" (=3000 yen / 12.5kWh).

[0113] The base unit price can also be 175 yen / kWh. In this case, the only charging condition where the unit price of charge becomes lower than the base unit price is the first charging condition out of the first to fourth charging conditions. However, the base unit price can be changed appropriately.

[0114] The charging speed of battery 11 may vary depending on its technical specifications. For example, the smaller the capacity of battery 11, the easier it is to enforce charging limits, and the easier it is for the charging speed of battery 11 to decrease. Initially (e.g., when vehicle 10 is manufactured), a charge-price mapping map matching the capacity of battery 11 is stored in storage device 52. Subsequently, if battery 11 of vehicle 10 is replaced, the charge-price mapping map is also updated to match the replaced battery (energy storage device).

[0115] Figure 6 This is the first example of a charging unit price mapping diagram. For example, with battery 11 having a capacity of "80kWh", it can be... Figure 6 The charging unit price mapping shown is stored in storage device 52. Figure 6 The charging unit price mapping shown is a matrix mapping with multiple regions divided into a grid. The regions included in the charging unit price mapping are identified by columns representing the first indicator (rated output of the power supply equipment) and rows representing the second indicator (start of charge, SOC).

[0116] Regarding columns, they are represented by eight intervals (regions) obtained by dividing the rated output of the power supply equipment from 20kW to 100kW in units of 10kW. Specifically, the intervals are divided into intervals greater than or equal to 20kW and less than 30kW (column: 20), intervals greater than or equal to 30kW and less than 40kW (column: 30), ..., and intervals greater than or equal to 90kW and less than 100kW (column: 90). Regarding rows, they are represented by ten intervals (regions) obtained by dividing the area where the initial SOC of charging is from 0% to 100% in units of 10%. Specifically, the intervals are divided into intervals greater than or equal to 0% and less than 10% (row: 0), intervals greater than or equal to 10% and less than 20% (row: 10), ..., and intervals greater than or equal to 90% and less than 100% (row: 90).

[0117] The regions included in the unit price of charging are identified by rows and columns as described above. For example, the region "row, column: 30, 60" refers to the interval (area) where the initial state of charge (SOC) is greater than or equal to 30% and less than 40%, and the rated output of the power supply equipment is greater than or equal to 60kW and less than 70kW.

[0118] For each region included in the charging unit price mapping, charging of battery 11 is performed with the rated output of the power supply equipment corresponding to that region and the starting state of charge (SOC). The charging unit price is set when charging ends 30 minutes after the start of charging. Initially (e.g., at the factory), the charging unit price for each region of the charging unit price mapping is set in advance through experiments or simulations.

[0119] Figure 7 This is the second example of a graph showing the unit price mapping for charging capacity. For example, if battery 11 has a capacity of "20kWh", then... Figure 7 The charging unit price mapping shown is stored in storage device 52. Figure 7 The charging unit price mapping diagram shown is also based on Figure 6 The diagram shown is a matrix mapping of the unit price of charging. However, in Figure 6 The charging unit price mapping diagram shown and Figure 7 The charging unit price mapping diagram shown indicates that the charging unit price is set differently for each region. Figure 6 The charging unit price mapping diagram shown displays the charging unit price calculated for an 80kWh energy storage device (e.g., battery 11) in each region. On the other hand, for... Figure 7 The charging unit price mapping shown in the diagram sets the charging unit price for each region of a 20kWh energy storage device (e.g., battery 11).

[0120] Figure 6 and Figure 7 The charging unit price mapping shown in the figure uses the unit [JPY / kWh] to represent the charging unit price for each region. However, it is not limited to this; "1" can also be used to represent the lowest charging unit price, and the charging unit price for other regions can be represented based on the charging unit price of that region.

[0121] Figure 8 It means Figure 6 A modified example of the unit price mapping diagram for charging quantity is shown. Figure 8 In the charging unit price mapping diagram shown, each of the regions in "Row, Column: 0, 90", "Row, Column: 10, 90", "Row, Column: 20, 90", "Row, Column: 30, 90", and "Row, Column: 40, 90" represents the lowest charging unit price. Furthermore, for example, the region in "Row, Column: 0, 20" represents a charging unit price that is "2.25" times the lowest charging unit price.

[0122] Figure 9 It means Figure 7 A modified example of the unit price mapping diagram for charging quantity is shown. Figure 9 In the charging unit price mapping diagram shown, the area with "row, column: 0, 40" represents the lowest charging unit price. Moreover, for example, the area with "row, column: 0, 20" represents a charging unit price that is "2" times the lowest charging unit price.

[0123] It should be noted that, in Figures 6-9In the charging unit price mapping diagram shown, the rated output range (20kW~100kW) and the number of intervals (divided into 8) of the power supply equipment can be appropriately changed. In addition, the number of intervals for the start of charging SOC (divided into 10) can also be appropriately changed.

[0124] It can be done Figure 4 The S15 process updates the values ​​of each region in the charge quantity unit price mapping map. If the battery 11 has been charged for 30 minutes, the ECU 50 can determine the region (actual range) corresponding to the performed charge based on the rated output and charge start SOC of the object device associated with the performed charge, and update the charge quantity unit price for the determined region. Alternatively, the ECU 50 can calculate the charge quantity unit price associated with the performed charge and replace the determined region's charge quantity unit price with the calculated charge quantity unit price in the charge quantity unit price mapping map. Or, the ECU 50 can set the value between the charge quantity unit price of the region corresponding to the performed charge (value before update) and the charge quantity unit price associated with the performed charge (e.g., the average value) as the charge quantity unit price of the region corresponding to the performed charge (value after update). It should be noted that updating the mapping map is equivalent to an example of "obtaining the mapping map." The updated mapping map is obtained through updating the mapping map.

[0125] exist Figure 4 In the processing flow F1 shown, ECU50 determines the actual range and target range in the charging unit price mapping diagram in S16. Next, ECU50 determines in S17 whether the actual range is included in the target range.

[0126] Figure 10 It means targeting Figure 8 The diagram shown illustrates the actual range and target range determined by the charging unit price mapping. For example, ECU 50 defines the region R10, representing a charging unit price lower than a predetermined first threshold (e.g., 1.30), as the target range. ECU 50 can determine the largest region (range) as the target range when multiple regions exist representing charging unit prices lower than the first threshold. This method facilitates the setting of a highly reliable target range. The size of the region can be represented by the number of intervals. For example, region R10 includes 25 intervals. Each interval included in region R10 represents a charging unit price lower than the first threshold.

[0127] ECU50 determines the performance range based on the rated output and start-of-charge state (SOC) of the target device associated with the performed charge. For example, in Figure 4In S12, if battery 11 is charged under the conditions that the state of charge (SOC) at the start of charging is greater than or equal to 90% and less than 100%, and the rated output of the target device is greater than or equal to 70kW and less than 80kW, then ECU50 will... Figure 4 In S16, interval R11 is defined as the actual performance range. Figure 4 In S12, if battery 11 is charged under the conditions that the state of charge (SOC) at the start of charging is greater than or equal to 80% and less than 90%, and the rated output of the target device is greater than or equal to 30kW and less than 40kW, then ECU50... Figure 4 In S16, interval R12 is defined as the actual performance range. Figure 4 In S12, if battery 11 is charged under the condition that the state of charge (SOC) at the start of charging is greater than or equal to 20% and less than 30%, and the rated output of the target device is greater than or equal to 20kW and less than 30kW, then ECU50... Figure 4 In S16, interval R13 is determined as the performance range. If any of the intervals R11 to R13 outside the target range (region R10) is determined as the performance range, ECU50 determines that the performance range is not included in the target range ("No" in S17) and proceeds to S19.

[0128] It should be noted that ECU50 can also be used in... Figure 4 In step S16, a target range of a rectangular shape is determined. For example, the target range can be defined as the area after removing the interval "row, column: 60, 60" from region R10. The target range of the rectangular shape can be represented by the upper and lower limits of the starting state of charge (SOC) and the upper and lower limits of the rated output of the power supply equipment. For example, the area after removing the interval "row, column: 60, 60" from region R10 can be represented as the area where the starting SOC is "greater than or equal to 0% and less than 50%" and the rated output of the power supply equipment is "greater than or equal to 60kW and less than 100kW".

[0129] Figure 11 It means targeting Figure 9 The diagram shown illustrates the performance range and target range determined by the charging unit price mapping. For example, ECU 50 determines the region R20, representing a charging unit price lower than a predetermined second threshold (e.g., 1.40), as the target range. ECU 50 can determine the largest region (range) as the target range when multiple regions represent charging unit prices lower than the second threshold exist. For example, region R20 includes six intervals. Each interval included in region R20 represents a charging unit price lower than the second threshold. As an example of the performance range determined for this charging unit price mapping, the following can be cited: Figure 11The intervals R21, R22, R23, R24, and R25 are defined as the actual performance range. If any of the intervals R21 to R25 outside the target range (area R20) is determined to be the actual performance range, ECU50 determines that the actual performance range is not included in the target range ("No" in S17) and proceeds the process to S19.

[0130] exist Figure 4 In S16, the performance range is determined based on the conditions of the performed charging. The conditions of the performed charging include, for example, the rated output of the target device and the state of charge (SOC) at the start of charging. An interval within the target range can also be determined as the performance range. If an interval within the target range is determined as the performance range, ECU50 determines that the performance range is included in the target range ("Yes" in S17) and proceeds the process to S18.

[0131] In S18, ECU50 notifies the user terminal of information (first charging information) related to the unit price of the charging performed in S12. The unit price of the charging performed in S12 is, for example, the unit price shown in the performance range determined in S16. The user terminal receiving the notification can be HMI80, mobile terminal 30, or both. The information related to the unit price of the charging performed in S18 includes, for example, at least one of the unit price of the charging and a determination result that the unit price of the charging is lower than a benchmark unit price. The user terminal receiving the notification displays the notified information (first charging information) to the user. When the notification in S18 is executed, the processing flow F1 ends.

[0132] Figure 12 It means by receiving Figure 4 An example diagram of the screen displayed on the user terminal in response to the S18 notification. The user terminal may, for example, display... Figure 12 The screen shown is Sc1. Screen Sc1 includes an information unit M11. The information unit M11 displays... Figure 4 The charging unit price of the charge performed in S12 and the good judgment result (good judgment) related to that charging unit price. A good judgment means that the charging unit price of the performed charge is lower than the benchmark unit price.

[0133] In S19, ECU50 notifies the user terminal of information (first charging information) related to the unit price of the charging quantity performed in S12 (e.g., the unit price of the charging quantity shown in the performance range determined in S16). The user terminal receiving the notification can be HMI80, mobile terminal30, or both. The information related to the unit price of the charging quantity notified in S19 includes at least one of the following: the unit price of the charging quantity, the determination result that the unit price of the charging quantity is higher than the reference unit price, the factors that cause the unit price of the charging quantity to increase, and the method for reducing the unit price of the charging quantity.

[0134] In S19, ECU50, for example, based on the updated charge unit price mapping in S15 and the actual range and target range determined in S16, determines the factors causing the charge unit price to increase and the methods for reducing the charge unit price. Specifically, to determine the above factors and methods, ECU50 performs a SOC (State of Charge) determination for the charging performed in S12 to see if the requirements for bringing the charging conditions into the target range (requirements of the second indicator) are met. Hereinafter, this determination will be referred to as the "second indicator determination." For example, in... Figure 10 In region R10, a charge start SOC greater than or equal to 0% and less than 70% corresponds to the requirement of the second indicator. If the charge start SOC is greater than or equal to 0% and less than 70%, the charging conditions can enter region R10. Furthermore, in... Figure 11 In region R20 shown, a charge start SOC greater than or equal to 0% and less than 30% corresponds to the requirements of the second indicator.

[0135] If, according to the second indicator determination, the charging start SOC performed in S12 does not meet the requirements of the second indicator, the ECU 50 determines whether the rated output of the device being charged in S12 meets the requirements for bringing the charging conditions into the target range (the requirements of the first indicator). Hereinafter, this determination will be referred to as the "first indicator determination." For example, in... Figure 10 In region R10, a rated output of 60kW or greater and less than 100kW for the target device meets the requirements of the first specification. If the rated output of the target device is 60kW or greater and less than 100kW, then the charging conditions can be met in region R10. Figure 11 In the area R20 shown, the rated output of the object device is greater than or equal to 30kW and less than 50kW, which is equivalent to the requirement of the first indicator.

[0136] It should be noted that the processing in S19 is performed when the actual performance range is not included in the target range. Therefore, in the above-mentioned second indicator determination, being judged to meet the requirements means that the rated output of the target device being charged in S12 does not meet the requirements of the first indicator.

[0137] If the conditions are met in the second indicator determination mentioned above, the ECU 50 will determine the method of reducing the unit price of charging by changing the power supply equipment used in charging the battery 11 in a way that the charging conditions enter the target range. For example, in Figure 10 In the charging unit price mapping diagram shown, when interval R13 is the actual range, such as Figure 10 As indicated by the middle arrow, the rated output of the power supply equipment should be greater than or equal to 60kW and less than 100kW, thus bringing the charging conditions into the target range. Figure 11In the charging unit price mapping diagram shown, when the interval R25 is the actual range, such as Figure 11 As indicated by the middle arrow, the rated output of the power supply equipment is made to be greater than or equal to 30kW and less than 50kW, thus bringing the charging conditions into the target range.

[0138] If the second indicator is deemed unmet in the above-mentioned criteria, but the first indicator is deemed met, the ECU 50 will determine that changing the charging start SOC by adjusting the charging conditions to enter the target range is a method to reduce the unit price of charging. For example, in Figure 10 In the charging unit price mapping diagram shown, when interval R11 is the actual range, such as Figure 10 As indicated by the middle arrow, the charging starts with a State of Charge (SOC) greater than or equal to 0% and less than 60%, thus bringing the charging conditions into the target range. Figure 11 In the charging unit price mapping diagram shown, when the interval R22 is the actual range, as follows: Figure 11 As shown by the middle arrow, the charging starts with a SOC of greater than or equal to 0% and less than 30%, thus bringing the charging conditions into the target range.

[0139] exist Figure 10 In the charging unit price mapping diagram shown, when the interval R12 is the actual range, or in Figure 11 In the charging unit price mapping diagram shown, if any of the intervals R21, R23, and R24 falls within the actual performance range, the conditions are deemed not met in both the first and second indicator judgments mentioned above. In such cases, ECU50 determines reducing the charging unit price by altering both the rated output of the power supply equipment and the starting state of charge (SOC) in a way that allows the charging conditions to enter the target range (see reference). Figure 10 or Figure 11 (The arrow in the image).

[0140] When the notification in S19 is executed, the processing flow F1 ends. Then, the user terminal that received the notification in S19 displays the notified information (first charging information) to the user.

[0141] Figure 13 It means by receiving Figure 4 The first screen displayed on the user terminal in response to the S19 notification. The user terminal may, for example, display... Figure 13 The screen shown is Sc2. Sc2 includes information unit M11A, information unit M12, information unit M13, and operation unit M14. Information unit M11A displays... Figure 4The S12 section displays the unit price of the charge quantity performed during charging and the related defect determination result (defect determination). A defect determination refers to a charge quantity unit price that is higher than the benchmark unit price. Information unit M12 displays the factors determining the higher charge quantity unit price as identified by ECU 50. Furthermore, information unit M13 displays the methods for reducing the charge quantity unit price as determined by ECU 50.

[0142] exist Figure 4 In S19, if the second indicator determines that the requirement is met, for example, if the touch panel display of the user terminal shows... Figure 13 The information unit M12, information unit M13, and operation unit M14 are shown. Information unit M12 displays... Figure 4 In step S12, the rated output of the device being charged and the state of charge (SOC) are checked, and the factor causing the increased unit price of the charge is the rated output of the power supply device. Information unit M13 displays the requirements of the first indicator and a message encouraging the selection of a power supply device that meets the requirements of the first indicator. When operation unit M14 is operated by the user, the user terminal, based on information received from ECU 50, displays one or more power supply devices that meet the requirements of the first indicator on a map, distinguishing them from those that do not. Figure 14 This indicates that the user terminal is responding to... Figure 13 The diagram shows an example of a screen displayed for user operation (operation unit M14).

[0143] Figure 14 Screen Sc3 shows EVSE20A to 20H on a map. Position Ps1 indicates the current position of vehicle 10. Screen Sc3 displays a map of the surrounding area of ​​vehicle 10 (e.g., the area within a specified distance of the current position of vehicle 10). The user terminal can obtain map information (including the location information of the power supply equipment) from the NAVI70. In screen Sc3, EVSE20A is... Figure 4 The device to be charged is the one in S12. Each of EVSE20A to 20E is a power supply device that does not meet the requirements of the first indicator. Each of EVSE20F to 20H is a power supply device that meets the requirements of the first indicator. The user terminal displays a solution that can distinguish between EVSE20A to 20E and EVSE20F to 20H. Figure 14 In the example shown, the two are represented by different labels. Screen Sc3 shows that EVSE20F to 20H are the recommended power supply devices among EVSE20A to 20H on the map.

[0144] Figure 15 It means by receiving Figure 4 The second screen displayed on the user terminal in the S19 notification. Figure 4 In S19, if both the first and second indicator determinations indicate that the requirements are not met, the user terminal may, for example, display... Figure 15 The screen shown is Sc4. Sc4 includes information units M11A, M12A, and M13A. Information unit M12A is displayed... Figure 4 In S12, the rated output and starting state of charge (SOC) of the device being charged are measured, and the factors contributing to the increased unit price of the charge are indicated by both the rated output and the starting SOC of the power supply equipment. The information unit M13A displays the requirements for the first and second indicators, and displays a message encouraging the use of a power supply equipment that meets the requirements of the first indicator and to begin charging the battery 11 at an SOC that meets the requirements of the second indicator.

[0145] according to Figure 4 The processing flow F1 shown executes a notification to the user terminal (S18 or S19) each time a scheduled charging session (e.g., 30 minutes) is performed ("Yes" in S13). This notification encourages users to change their behavior to improve the economy of daily charging (habitual charging). However, the frequency of the notification can be appropriately varied. For example, the ECU 50 could execute the notification every month. The user terminal receiving the notification can then display the number of times the actual performance range did not fall within the target range or the percentage of the actual performance range that fell within the target range on the charging unit price mapping graph of vehicle 10.

[0146] In this embodiment, Figure 1 The server 100 shown accepts reservations for EVSEs. The user terminal of vehicle 10 (e.g., at least one of HMI 80 and mobile terminal 30) is configured to reserve EVSEs by communicating with server 100. For the reserved EVSE among the multiple EVSEs included in the power supply system described above, server 100 only authorizes the user who reserved the EVSE to use it. For example, the use of the EVSE is authorized through user authentication between the user terminal that reserved the EVSE and server 100. A reservation validity period (hereinafter referred to as the "reservation period") is determined when the EVSE is reserved. The EVSE reservation is only valid within the reservation period. The user terminal requests an EVSE reservation from server 100 by sending identification information representing the EVSE and the reservation period information to server 100. If server 100 accepts the request, the EVSE reservation is established.

[0147] When EVSE is scheduled through the user terminal of vehicle 10, ECU 50 executes... Figure 16 The processing flow shown is F2. Figure 16 This is a flowchart illustrating the second notification method of this embodiment.

[0148] In process flow F2, ECU 50 obtains equipment information related to the reserved EVSE from server 100, which manages the reserved EVSE, in S21. The equipment information includes the technical specifications (e.g., rated output) and cost information (e.g., unit price) of the reserved EVSE. Next, in S22, ECU 50 determines whether the reservation period is approaching. For example, ECU 50 determines whether a specified time has elapsed since the start of the reservation period. If the reservation period is determined not to be approaching (marked as "No" in S22), the determination in S22 is repeated.

[0149] If it is determined that the scheduled period is approaching ("Yes" in S22), ECU 50 predicts the SOC of battery 11 when vehicle 10 arrives at the scheduled EVSE in S23, for example, based on the current SOC of battery 11 and energy consumption (specifically, the energy consumed by vehicle 10 before vehicle 10 arrives at the scheduled EVSE). ECU 50 can use at least one of the following to predict the energy consumption: distance between the scheduled EVSE and vehicle 10, road information (congestion, gradient, etc.), and temperature. If charging of battery 11 is performed at the scheduled EVSE, the SOC predicted in S23 is considered the charging start SOC.

[0150] Next, in S24, ECU50 determines whether the charging conditions predicted in the charge unit price mapping map fall within the target range. The predicted charging conditions include the reserved rated output of the EVSE and the charge start state of charge predicted in S23. The target range in the charge unit price mapping map is... Figure 4 S16 is similarly determined. For example, the unit price mapping for charging quantity in vehicle 10 is... Figure 11 In the case of the charging unit price mapping shown, if the rated output of the reserved EVSE is greater than or equal to 30kW and less than 50kW, and the predicted charging start SOC in S23 is greater than or equal to 0% and less than 30%, then S24 is judged as "yes". If this is not the case, then S24 is judged as "no". If S24 is judged as "yes", then process flow F2 ends.

[0151] On the other hand, if the result in S24 is "no", ECU50 searches for an EVSE that can charge battery 11 within the target range set in the charging unit price mapping map in S25. ECU50 can obtain the charging conditions for candidate EVSEs by following the processes in S21 and S23. Next, ECU50 notifies the user terminal of a suggested reservation change in S26. ECU50 can notify the user terminal of information related to the EVSE reserved at the current time and information related to the EVSE found through the search in S25 through the processing in S26. Information related to the EVSE reserved at the current time includes, for example, at least one of identification information, location information, rated output, charging unit price, charging start SOC, and charging unit price. Information related to the EVSE found through the search in S25 includes, for example, at least one of identification information, location information, rated output, charging unit price, charging start SOC, and charging unit price. ECU50 can obtain the charging unit price of each EVSE based on the charging unit price mapping map of vehicle 10. Next, in S27, ECU50 determines whether the user has accepted the suggestion. If the user has accepted the suggestion in S26 ("Yes" in S27), ECU50 requests a change to the reservation from server 100 in S28. Specifically, ECU50 cancels the current reservation and requests server 100 to re-reserve the EVSE found through the search in S25. The EVSE found through the search in S25 is equivalent to a power supply device that meets the requirements of the first and second indicators in the charging unit price mapping diagram. If the user has not accepted the suggestion in S26 ("No" in S27), the processing in S28 is not executed, and the processing flow F2 ends.

[0152] The following uses Figure 17 The processing of S26 and S27 above will be explained. Figure 17 It means by receiving Figure 16 An example of the screen displayed on the user terminal in the S26 notification.

[0153] The user terminal's touch panel display can respond to Figure 16 The notification from S26 is displayed. Figure 17 The screen shown is Sc5. Screen Sc5 includes information units M21 to M25 and operation unit M26. Information unit M21 displays the current location of vehicle 10 Ps1, the location of the EVSE (hereinafter also referred to as "reserved charging station") reserved at the current time Ps2, and the location of the vehicle 10 on the map. Figure 16The location Ps3 of the EVSE (hereinafter also referred to as "recommended charging station") found by the search in S25. Information unit M22 displays equipment information related to the reserved charging station (e.g., rated output and charging unit price). Information unit M23 displays equipment information related to the recommended charging station (e.g., rated output and charging unit price). The charging unit price for each EVSE is a time-based unit price. Information unit M24 displays a message suggesting a change of reservation from the reserved charging station to the recommended charging station, the charging start SOC and charging unit price of the reserved charging station, and the charging start SOC and charging unit price of the recommended charging station. Information unit M25 displays the remaining time until the reservation change is executed. Operation unit M26 accepts the user's operation to reject the suggestion.

[0154] The user terminal counts down the remaining time displayed on the information unit M25. When the operation unit M26 is not operated and the remaining time becomes 0, the user terminal requests a change to the reservation from the ECU 50. Upon receiving the request, the ECU 50 determines "yes" in S27 and executes the reservation change in S28. On the other hand, if the operation unit M26 is operated before the remaining time becomes 0, the user terminal notifies the ECU 50 that the suggestion has not been accepted. Upon receiving this notification, the ECU 50 determines "no" in S27. In this case, the reservation change is not executed.

[0155] Based on the above configuration, if the user does not operate the operation unit M26, the reservation change will be automatically executed at a predetermined time (the time corresponding to the remaining time shown on the information unit M25). This improves user convenience. The user can easily cancel the reservation within the specified cancellation period. However, it is not limited to this; reservation changes can also be executed based on user actions.

[0156] The notification method of the above embodiments includes Figure 4 and Figure 16 The processes are shown. In this embodiment, each process is executed by one or more processors executing programs stored in one or more memories. However, these processes can also be executed solely by hardware (electronic circuitry) without using software.

[0157] The notification system of the above embodiment includes an ECU 50 (notification device) that notifies the user terminal (HMI 80, mobile terminal 30) of the vehicle 10 of first charging information related to the charging of the battery 11 (energy storage device) installed in the vehicle 10. The ECU 50 acquires second charging information (a charging unit price mapping map) representing the relationship between a first indicator, a second indicator, and a third indicator. The first indicator is an indicator related to the EVSE (electrical power supply equipment) that supplies power to the battery 11. Specifically, the first indicator represents the rated output of the EVSE. The second indicator is an indicator related to the battery 11. Specifically, the second indicator represents the SOC at the start of charging (the SOC of the battery 11 when charging begins). The third indicator is a first parameter that decreases as the charging speed of the battery 11 increases. Specifically, in the above embodiment, the battery 11 is charged by a time-based charging equipment, and the charging unit price is used as the first parameter. The higher the charging speed, the lower the charging unit price. However, the charging unit price also changes according to the charging unit price. The higher the charging unit price (time unit price), the higher the charging unit price.

[0158] In the above embodiment, the ECU 50 uses the second charging information to determine the requirements for the first and second indicators where the first parameter becomes smaller than the first reference value (refer to...). Figure 10 and Figure 11 (Regions R10 and R20 in the text). Then, the ECU50 notifies the user terminal of the first charging information based on the determined requirements (refer to...). Figure 4 S18, S19 and Figure 16 (S26). With such notification, the user can easily determine the charging conditions of battery 11 in a manner that constitutes an appropriate charging speed. Charging speed can affect the degradation of on-board components. When the charging speed is low due to charging limitations, it is possible to place excessive load on on-board components (especially charging-related components). Furthermore, energy is easily consumed due to the heat generated accompanying charging limitations. Moreover, charging speed can also affect the economics of charging.

[0159] In the above embodiment, after charging of battery 11 is performed, ECU 50 updates the second charging information using the rated output of the target device (EVSE), the state of charge (SOC) of battery 11 at the start of charging, and the electrical energy input to battery 11 through charging. Figure 4 (S15). Thus, the ECU 50 can easily obtain second charging information that matches the various characteristics of the vehicle 10 and its user. Furthermore, if the charging of the battery 11 performed does not meet the requirements of at least one of the first and second indicators, the ECU 50 notifies the user terminal of the first charging information indicating the unmet requirement. Figure 4(S19). Thus, the user can easily charge the battery 11 in a manner that satisfies both the first and second indicators.

[0160] In the above embodiment, the ECU50 determines whether the power supply equipment reserved through the user terminal meets the requirements of the first indicator and the second indicator. If the reserved power supply equipment does not meet the requirements of at least one of the first indicator and the second indicator, the ECU50 notifies the user terminal of a suggested change to the reservation. Figure 16 (S26). This suggestion (see reference) Figure 17 Users can easily perform charging that meets the requirements of both the first and second indicators.

[0161] Based on the first charging information notified from ECU50, the user terminal will distinguish between power supply devices that meet the first criterion and those that do not meet the first criterion on the map (see reference). Figure 14 Therefore, users can easily identify power supply equipment that meets the requirements of the first indicator (the requirements for charging conditions to enter the target range).

[0162] ECU50 is not required to execute processing procedure F1. Figure 4 ) and processing flow F2 ( Figure 16 These two parties. For example, ECU50 can also be configured to execute only either process flow F1 or F2.

[0163] The second charging information described above is not limited to the charging unit price mapping chart. Furthermore, the third indicator of the second charging information may not be the first parameter (e.g., charging unit price), but rather a second parameter that increases with the charging speed of battery 11. Moreover, the ECU 50 can determine the conditions for the first and second indicators in the second charging information to make the second parameter larger than the second reference value. The second parameter may be the charging speed.

[0164] Figure 18 This represents the first example of using the second parameter as the third indicator for the second charging information. In vehicle 10 where the battery 11 has a capacity of "80kWh", for example, it can be... Figure 18 The charging speed map (second charging information) shown is stored in storage device 52 instead. Figure 6 or Figure 8The charging rate map shows a unit price mapping. Similar to the unit price mapping, the regions included in this charging rate map are identified by columns representing the first indicator (rated output of the power supply equipment) and rows representing the second indicator (start-of-charge state of charge). Specifically, for each region included in the charging rate map, battery 11 is charged with the rated output of the power supply equipment corresponding to that region and the start-of-charge state of charge. An average charging rate (charge amount per unit time) is set when charging ends after 30 minutes from the start of charging. Figure 18 In the charging speed mapping diagram shown, "1" represents the lowest charging speed, and the charging speed of other areas is represented by the charging speed of this area.

[0165] Figure 19 Indicating targeting Figure 18 The charging speed mapping diagram shown identifies the actual and target ranges. Figure 4 In S16, ECU 50, for example, determines the region R30, which represents a charging speed higher than a predetermined third threshold (e.g., 2.8), as the target range. Then, ECU 50 determines the performance range based on the rated output and charge start state of the target device related to the performed charging. If any of the intervals R31 to R33 outside the target range (region R30) are determined as the performance range, in Figure 4 If the condition in S17 is "No", the process proceeds to S19. In S19, ECU 50, for example, determines the factors causing the low charging speed and methods to increase the charging speed based on the charging speed map and the actual and target ranges determined in S16. ECU 50 can determine the charging conditions that make the actual range (e.g., any one of intervals R31 to R33) as follows: Figure 19 The method for entering the target range is shown by the arrow in the diagram. In S19, ECU50 notifies the user terminal of the determined factors and methods, etc.

[0166] Figure 20 This is a second example of using the second parameter as the third indicator for the second charging information. In vehicle 10 where the battery 11 has a capacity of "20kWh", for example, it can be... Figure 20 The charging speed map (second charging information) shown is stored in storage device 52 instead. Figure 7 or Figure 9 The diagram shows the unit price mapping for charging.

[0167] Figure 21 Indicating targeting Figure 20 The charging speed mapping diagram shown identifies the actual and target ranges. Figure 4In S16, ECU 50, for example, determines the region R40, which represents a charging speed higher than a predetermined fourth threshold (e.g., 1.45), as the target range. Then, ECU 50 determines the performance range based on the rated output and charge start state of the target device associated with the performed charging. If any of the intervals R41 to R45 outside the target range (region R40) are determined as the performance range, in Figure 4 If the condition in S17 is "No", the process proceeds to S19. In S19, ECU 50, for example, determines the factors causing the low charging speed and methods to increase the charging speed based on the charging speed map and the actual and target ranges determined in S16. ECU 50 can determine the charging conditions that make the actual range (e.g., any one of intervals R41 to R45) as follows: Figure 21 The method for entering the target range is shown by the arrow in the diagram. In S19, ECU50 notifies the user terminal of the determined factors and methods, etc.

[0168] In the above embodiments or variations thereof, at least one of the charging diagnostic function and notification function of the ECU50 can be mounted on the power supply equipment. Figure 22 This represents an example of a power supply device that has charging diagnostic and notification functions.

[0169] Figure 22 The EVSE20 shown here has a control unit 21X instead of a control unit 21 ( Figure 1 In addition to having Figure 1 The configuration is the same as that of the EVSE20A shown. The control unit 21X includes a storage device for storing device information (e.g., technical specifications and cost information) of the EVSE20. The control unit 21X includes a unit P1A related to the charging diagnostic function and a notification unit P2. Unit P1A includes a diagnostic unit P13A. The diagnostic unit P13A has a configuration according to… Figure 3 The diagnostic unit P13A is shown to have the following functions. However, the diagnostic unit P13A obtains battery information and second charging information from the vehicle 10A for the battery 11, and obtains device information for the EVSE20 from the aforementioned storage device. The notification unit P2 has the same... Figure 3 The notification section P2 shown has the same function. Figure 22 The diagnostic unit P13A and the notification unit P2 shown can be implemented by programs in the processor and storage device, respectively, or by dedicated hardware (e.g., electronic circuits).

[0170] In a variation, the multiple EVSEs included in the power supply system, for example, each have a... Figure 22 The EVSE20 shown has the same configuration. Figure 22 The vehicle 10A shown here, in addition to having ECU50A to replace ECU50, also has the same... Figure 2The vehicle shown has the same configuration as vehicle 10. The ECU 50A omits [the specific component / function]. Figure 3 In addition to the charging diagnostic and notification functions shown, it also has the following features: Figure 1 The ECU50 shown has the same function. Furthermore, ECU50A, for example, performs... Figure 23 The processing flow shown is F1A instead. Figure 4 The processing flow shown is F1.

[0171] Figure 23 This is a flowchart illustrating the charging control of a modified example. Processing flow F1A omits S15 to S19 (…). Figure 4 Furthermore, S15A was added, which is identical to process flow F1. In process flow F1A, after passing through from... Figure 22 During the charging of battery 11 by the power supplied by EVSE20 to vehicle 10A, S12 to S14 are repeated. Then, when a predetermined time (e.g., 30 minutes) has elapsed before battery 11 reaches a fully charged state ("Yes" in S13), the process proceeds to S15A, and charging of battery 11 ends. In S15A, ECU50A notifies control unit 21X of the end of charging.

[0172] Upon receiving notification from S15A, control unit 21X begins... Figure 24 The processing flow shown is F1B. Figure 24 This is a flowchart illustrating the notification method for a variant example. Processing flow F1B omits S11 to S14. Figure 4 In addition to S15B, S15C, and S20, Figure 4 The processing flow shown is the same as F1.

[0173] In processing flow F1B, control unit 21X obtains second charging information (e.g., a charging quantity unit price mapping map or a charging speed mapping map) from ECU 50A in S15B. Next, control unit 21X obtains battery information from ECU 50A in S15C. The battery information includes... Figure 23 In S12, the charging start SOC and charging amount are calculated. The charging amount is equivalent to the input electrical energy of battery 11 during the period from the start of charging to the end of charging. Next, in S15, control unit 21X updates the second charging information obtained in S15B using the battery information obtained in S15C and the device information read from the storage device of control unit 21X. The device information includes, for example, the rated output of EVSE20. The update method is similar to... Figure 4The process is the same as S15. Afterwards, a notification to the user terminal is executed via S18 or S19, and the process proceeds to S20. In S20, the control unit 21X of the EVSE20 sends the updated second charging information from S15 to the ECU 50A of the vehicle 10A. The ECU 50A stores the received second charging information in its own storage device.

[0174] Figure 3 or Figure 22 The charging diagnostic and notification functions shown can also be installed on a computer device in the cloud via cloud computing. Figure 25 It means having Figure 3 The diagram shows the cloud server for charging diagnostics and notification functions. Figure 25 The cloud server 200 shown has Figure 3 The unit P1 and notification unit P2 are shown. Server 200 is configured to communicate with each of the vehicle 10A, the user terminal (mobile terminal 30) of the vehicle 10A, and the EVSE 20A that supplies power to the vehicle 10A. Server 200 can be configured to communicate with server 100, which manages EVSE 20A, on behalf of EVSE 20A, or to communicate with server 100, which manages EVSE 20A, in addition to EVSE 20A. Vehicle 10A can cooperate with server 200 to perform operations. Figure 4 The processing flow shown is F1.

[0175] Figure 22 The charging diagnostic and notification functions shown can also be installed on computer devices that manage power supply equipment. Figure 26 It means having Figure 22 The diagram shows the server's charging diagnostic and notification functions. Figure 26 The server 100A shown has Figure 22 The unit P1A and the notification unit P2 are shown. They have... Figure 1 The EVSE20A configuration shown can work in conjunction with server 100A. Figure 24 The processing flow shown is F1B.

[0176] The number of indicators in the second charging information is not limited to three; it can also be four or more. For example, the external air temperature or the temperature of the energy storage device can be added as a fourth indicator.

[0177] The composition of a vehicle is not limited to the above-mentioned composition (see reference). Figure 1 and Figure 2 The vehicle is not limited to a four-wheeled passenger car; it can also be a bus or truck. The vehicle can be configured for autonomous driving or even flight capabilities. The power supply equipment is also not limited to the configurations described above (see [reference]). Figure 1 ).For example, Figure 1 The image shows an EVSE20A with only one charging cable 23. However, the power supply device can also have multiple charging cables. Such a power supply device can be configured to simultaneously power multiple vehicles via multiple charging cables. The power supply device is not limited to DC (direct current) power supply devices, but can also be AC ​​(alternating current) power supply devices. The power supply device can also be a wireless power supply device. Vehicles and energy storage devices can also be configured to perform wireless charging.

[0178] The various variations described above can be combined in any way to implement them.

[0179] Embodiments of the present invention have been described, but should be considered as exemplary in all respects and not restrictive. The scope of the invention is set forth in the claims and is intended to include all modifications within the meaning and scope of the claims.

Claims

1. A vehicle comprising an electric storage device and a control device, wherein, The vehicle is configured to charge the energy storage device using electricity supplied from a time-based charging facility. The control device is configured to use equipment information related to the power supply equipment and information of the energy storage device to calculate a charging unit price representing the charging cost per unit of charging, and to notify the user terminal of information related to the calculated charging unit price.

2. The vehicle according to claim 1, wherein, The information related to the unit price of the charging quantity indicates at least one of the factors that increase the unit price of the charging quantity and the methods that decrease the unit price of the charging quantity.

3. The vehicle according to claim 1, wherein, The device information represents the output power and charging cost of the power supply equipment.

4. The vehicle according to any one of claims 1 to 3, wherein, The information of the energy storage device indicates the state of charge (SOC) and capacity of the energy storage device.

5. The vehicle according to claim 1, wherein, The user terminal is an in-vehicle terminal mounted on the vehicle or a portable terminal carried by the user of the vehicle.

6. The vehicle according to claim 1, wherein, The control device is configured to perform the following actions: Using the equipment information and the energy storage device information, obtain a mapping diagram representing the relationship between a first indicator related to the power supply equipment, a second indicator related to the energy storage device, and the unit price of the charging quantity; The mapping diagram defines a performance range and a target range, wherein the performance range represents the first and second indicators of the performed charging, and the target range represents the first and second indicators where the unit price of the charging volume becomes lower than a predetermined value; and If the target range does not include the actual performance range, at least one of the factors that increase the unit price of the charging quantity and the method of reducing the unit price of the charging quantity will be notified to the user terminal.

7. A power supply device, which is a time-based charging power supply device equipped with a control device, wherein, The control device is configured to perform the following actions: Information about the energy storage device installed in the vehicle is obtained from the vehicle; as well as Using the acquired information about the energy storage device and the equipment information related to the power supply equipment, a unit price representing the charging cost per unit of charging is calculated, and information related to the calculated unit price of charging is notified to the user terminal.

8. A notification system, comprising a notification device that notifies a user terminal of the vehicle of first charging information related to the charging of a battery storage device mounted in the vehicle, wherein, The notification device is configured to perform the following actions: Obtain second charging information that represents the relationship between the first indicator, the second indicator, and the third indicator; as well as The first charging information is notified to the user terminal based on the second charging information; The first indicator is an indicator related to the power supply equipment that supplies power to the energy storage device. The second indicator is an indicator related to the energy storage device. The third indicator represents a parameter associated with the charging speed of the energy storage device.

9. The notification system according to claim 8, wherein, The first indicator represents the rated output of the power supply equipment for charging the energy storage device. The second indicator represents the state of charge (SOC) of the energy storage device when charging begins.

10. The notification system according to claim 9, wherein, The parameter associated with the charging speed of the energy storage device is a first parameter that decreases as the charging speed of the energy storage device increases. The notification device is configured to perform the following actions: The second charging information is used to determine the requirements for the first indicator and the second indicator to become smaller than the first reference value; as well as Based on the determined requirements, the first charging information is notified to the user terminal.

11. The notification system according to claim 9, wherein, The parameter associated with the charging speed of the energy storage device is a second parameter that increases as the charging speed of the energy storage device increases. The notification device is configured to perform the following actions: The second charging information is used to determine the requirements for the first indicator and the second indicator to become larger than the second reference value; as well as Based on the determined requirements, the first charging information is notified to the user terminal.

12. The notification system according to claim 10 or 11, wherein, The notification device is configured to perform the following actions: After the energy storage device has been charged by the power supply equipment, the second charging information is updated using the rated output of the power supply equipment, the SOC of the energy storage device at the start of charging, and the electrical energy input to the energy storage device through charging. as well as If the charging of the energy storage device that has been performed does not meet the requirements of at least one of the first indicator and the second indicator, the first charging information indicating that the requirement is not met will be notified to the user terminal.

13. The notification system according to claim 10 or 11, wherein, The notification device is configured to perform the following actions: Determine whether the power supply equipment reserved through the user terminal meets the requirements of the first indicator and the second indicator; as well as If the reserved power supply equipment does not meet the requirements of at least one of the first and second indicators, the user terminal shall be notified of a suggested change of reservation.

14. The notification system according to claim 10 or 11, wherein, The notification system also includes the user terminal. The user terminal is configured to, based on the first charging information received, distinguish one or more power supply devices that meet the first criterion from power supply devices that do not meet the first criterion on a map.

15. A notification method for notifying a user terminal of an energy storage device, the notification method comprising: The computer device uses information related to the time-based charging equipment and information related to the energy storage device that has been charged by the power supplied from the power equipment to calculate a charging unit price representing the charging cost per unit of charging. as well as The computer device will notify the user terminal of information related to the calculated unit price of the charging quantity.

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