Guidance device, guidance method, and program

Abstract

To visually grasp a recovery amount of a battery charging rate when a vehicle uses each charging facility.SOLUTION: A guidance device for guiding a charging facility, includes a positional information acquisition section, a display section, and a control section. The positional information acquisition section acquires information on a current position of a mobile object. The display section is configured to be able to display the charging facility. The control section is configured to extract a charging facility located within an area based on the current position, predict a recovery amount of a charged state of a battery, which is expressed as a charging rate relative to a full charge of the battery in a case in which the battery of the mobile object is charged at the charging facility for a predetermined charging time, and vary a display form of the charging facility displayed on a map image according to a predicted value of the recovery amount of the charged state.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to a guidance device, a guidance method, and a program for providing guidance to charging facilities. [Background technology]

[0002] 2. Description of the Related Art Navigation devices have been proposed that display charging information so that a user who uses a vehicle during the day can easily select a charging facility for charging the vehicle's power storage mechanism (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-030993 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional systems that guide users to charging facilities, it is difficult for users to visually grasp the recovery amount of the battery charging rate when using each charging facility.

[0005] In view of the above circumstances, an object of the present disclosure is to make it possible to visually grasp the recovery amount of the battery charging rate when using each charging facility. [Means for solving the problem]

[0006] A guidance device according to one embodiment of the present disclosure is a guidance device that provides guidance to charging facilities, and includes a location information acquisition unit that acquires information on the current location of a mobile body, a display unit configured to display the charging facilities, and a control unit configured to extract charging facilities located within an area based on the current location, predict the amount of recovery of the charge state of the battery expressed as a charging rate relative to a full charge of the battery when the battery of the mobile body is charged for a predetermined charging time at the charging facility, and change the display form of the charging facility displayed on the display unit depending on the predicted value of the amount of recovery of the charge state.

[0007] A guidance method according to one embodiment of the present disclosure is a guidance method executed by a control unit of a guidance device that provides guidance to charging facilities, and includes obtaining information on a current location of a mobile body, extracting charging facilities located within an area based on the current location, predicting an amount of recovery of the state of charge of the battery of the mobile body expressed as a charging rate relative to a full charge of the battery when the battery is charged for a predetermined charging time at the charging facility, and displaying the charging facility on a display unit in a different display format depending on the predicted value of the amount of recovery of the state of charge.

[0008] A program according to one embodiment of the present disclosure causes a computer to perform processing including obtaining information on a current location of a mobile body, extracting charging facilities located within an area based on the current location, predicting the amount of recovery of the state of charge of the battery of the mobile body expressed as a charging rate relative to a full charge of the battery when the battery is charged for a predetermined charging time at the charging facility, and displaying the charging facility on a display unit in a different display format depending on the predicted value of the amount of recovery of the state of charge. Effect of the Invention

[0009] According to the present disclosure, it is possible to visually grasp the recovery amount of the battery charging rate when using each charging facility. [Brief description of the drawings]

[0010] [Figure 1]1 is a block diagram showing a schematic configuration of a guidance system including a guidance device according to an embodiment; [Diagram 2] FIG. 2 is a block diagram showing a schematic configuration of the vehicle shown in FIG. [Diagram 3] 2 is a block diagram illustrating a schematic configuration of a server in FIG. 1. [Figure 4] 4 is a diagram showing an example of information on charging facilities stored in a server storage unit of FIG. 3. FIG. [Diagram 5] 2 is a block diagram illustrating a schematic configuration of the guiding device of FIG. 1. [Figure 6] 6 is a diagram showing an example of an image including a charging facility displayed on the display unit of FIG. 5. FIG. [Figure 7] 10 is a diagram illustrating an example of a method for setting a priority of a charging facility based on a positional relationship between a vehicle and a road on which the vehicle travels. FIG. [Figure 8] 11 is a diagram illustrating another example of a method for setting the priority of charging facilities based on a positional relationship between a vehicle position and a road on which the vehicle travels. FIG. [Figure 9] 11 is a flowchart illustrating an example of a process executed by a control unit of the guidance device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. Note that the drawings used in the following description are schematic. The dimensional ratios and the like in the drawings do not necessarily correspond to the actual ones.

[0012] (Guidance system) 1 shows a guidance system 1 including a guidance device 20 according to an embodiment of the present disclosure. The guidance system 1 includes a vehicle 10, a guidance device 20 mounted on the vehicle 10, and a server 30. The guidance device 20 and the server 30 can transmit and receive information to and from each other via a communication network 50. The communication network 50 includes the Internet, at least one wide area network (WAN), at least one metropolitan area network (MAN), or any combination thereof.

[0013] When an information processing device 42 included in the charging facility 40 is capable of transmitting information to the guidance device 20 or the server 30, the guidance system 1 may further include a charging facility 40. Although only one vehicle 10, guidance device 20, and charging facility 40 are illustrated in Fig. 1, a large number of vehicles 10, guidance devices 20, and charging facilities 40 may exist.

[0014] The guidance system 1 is a system that displays to the user of the vehicle 10 so that the user of the vehicle 10 can visually grasp the recovery amount of the battery charging rate when using each charging facility 40 in order to select a charging facility 40 at which to charge the battery. The guidance device 20 is disposed in the vehicle 10 and has a function of displaying the charging facilities 40 to the user. Each component of the guidance system 1 will be described below.

[0015] (Vehicle configuration) The vehicle 10 of the present disclosure is an electric vehicle such as a BEV (Battery Electric Vehicle) or a PHEV (Plug-in Hybrid Electric Vehicle) that uses electricity as a power source. The vehicle 10 is, for example, a passenger car, but is not limited thereto and may include a truck, a bus, or a special vehicle. As shown in FIG. 2, the vehicle 10 includes a battery 11 and a position detection unit 12 in addition to a guide device 20. The vehicle 10 is included in moving objects. The moving object is not limited to the vehicle 10. For example, the moving object may include an electrically powered, manned flying object other than the vehicle 10.

[0016] The battery 11 stores electric power for driving the vehicle 10. The battery 11 includes a secondary battery that can be repeatedly charged and discharged, such as a lithium ion secondary battery or a nickel-metal hydride secondary battery. The battery 11 may employ other power storage devices, such as a multilayer capacitor, instead of a secondary battery. The battery 11 includes a battery management system (BMS) that controls charging and discharging of electric power. The battery control system can calculate the state of charge (SOC) of the battery 11. The state of charge is calculated, for example, from the open circuit voltage value of the battery 11 or by integrating the charging current value to the battery 11. The battery 11 may be disposed in any location, such as under the rear seat of the vehicle 10 or in the luggage compartment.

[0017] The position detection unit 12 detects the current position of the vehicle 10. The position detection unit 12 includes, for example, a GPS (Global Positioning System) receiver, and can obtain information on the latitude and longitude of the current position of the vehicle 10 using a signal from the GPS receiver. Note that instead of or in addition to the GPS receiver, a receiver compatible with another global positioning system (GNSS: Global Navigation Satellite System) may be adopted. In addition to the signal from the GPS receiver, signals from various detection devices such as a direction sensor, a steering angle sensor, and a distance sensor may be used to identify the position.

[0018] (Server configuration) The server 30 is a computer belonging to a cloud computing system or another computing system. The server 30 can collect information on the charging facilities 40 and provide the information to the guidance device 20. As shown in FIG. 3 , the server 30 includes a server control unit 31, a server communication unit 32, and a server storage unit 33.

[0019] The server control unit 31 includes at least one processor, at least one programmable circuit, at least one dedicated circuit, or any combination thereof. The processor is a general-purpose processor such as a central processing unit (CPU) or a graphics processing unit (GPU), or a dedicated processor specialized for a specific process. The programmable circuit is, for example, a field-programmable gate array (FPGA). The dedicated circuit is, for example, an application specific integrated circuit (ASIC). The server control unit 31 executes processes related to the operation of the server 30 while controlling each unit of the server 30.

[0020] The server control unit 31 acquires information on the charging facility 40 via the communication network 50. The server control unit 31 can store the collected information on the charging facility 40 in the server storage unit 33. The server control unit 31 can receive an information request from the guiding device 20 via the server communication unit 32 and transmit information to the guiding device 20.

[0021] The server communication unit 32 includes at least one communication interface that supports a communication connection via the communication network 50. The communication interface supports, for example, a mobile communication standard, a wired LAN standard, or a wireless LAN standard, but is not limited to these, and may support any communication standard.

[0022] The server storage unit 33 includes at least one semiconductor memory, at least one magnetic memory, at least one optical memory, or any combination thereof. The semiconductor memory is, for example, a random access memory (RAM) or a read only memory (ROM). The RAM is, for example, a static random access memory (SRAM) or a dynamic random access memory (DRAM). The ROM is, for example, an electrically erasable programmable read only memory (EEPROM). The server storage unit 33 functions as, for example, a main storage device, an auxiliary storage device, or a cache memory. The server storage unit 33 stores data used in the operation of the server 30 and data obtained by the operation of the server 30. The server storage unit 33 can store system programs, application programs, information on the charging facility 40, and the like.

[0023] The server storage unit 33 stores information about a large number of charging facilities 40. The information about the charging facilities 40 includes location information about each charging facility 40. The location information may include, for example, information about the latitude and longitude of the location of the charging facility 40. The location information may also include information about the road adjacent to the charging facility 40 and the location of an entrance through which the vehicle 10 can enter.

[0024] Furthermore, the server storage unit 33 can store and manage various information related to each charging facility 40. For example, as shown in FIG. 4, the server storage unit 33 may store and manage identification information of each charging facility 40, and information on the maximum charging time, charging output, and charging standard of the charging equipment 41 provided in the charging facility 40. The maximum charging time is an upper limit value of the charging time available for one charging of the charging equipment 41 set by the charging facility 40. The charging output is the maximum output that the charging equipment 41 can charge, and indicates the capacity of the charging equipment 41. The unit of the charging output may be specified in A (ampere) instead of W (watt). The charging standard is a charging standard supported by the charging equipment 41, and includes, for example, J1772, CHAdeMO, North American Charging Standard (NACS), GB / T, and Combined Charging System (CCS).

[0025] Furthermore, the server storage unit 33 can store and manage information such as usage restrictions, payment methods, and whether or not reservations are required for each charging facility 40. The information on usage restrictions includes information on restrictions based on attributes of users of the charging facility 40. For example, if the charging facility 40 can only be used by members of a specific service, this information is included in the information on usage restrictions. The payment method indicates the payment methods available at the charging facility 40. Payment methods include, for example, cash, credit cards, debit cards, specific prepaid cards, and other online payment methods operated by specific businesses.

[0026] (Configuration of the guide device) The guidance device 20 is an information device mounted on the vehicle 10. The guidance device 20 may use, for example, hardware common to a navigation system. The guidance device 20 includes, for example, a control unit 21, a communication unit 22, a storage unit 23, a position information acquisition unit 24, an input unit 25, and an output unit 26, as shown in FIG.

[0027] Like the server control unit 31, the control unit 21 includes at least one processor, at least one programmable circuit, at least one dedicated circuit, or any combination of these. The control unit 21 executes processes related to the operation of the guiding device 20 while controlling each part of the guiding device 20.

[0028] Like the server communication unit 32, the communication unit 22 includes at least one communication interface.

[0029] The storage unit 23 includes at least one semiconductor memory, at least one magnetic memory, at least one optical memory, or any combination thereof, similar to the server storage unit 33. The storage unit 23 stores data used in the operation of the guiding device 20 and data obtained by the operation of the guiding device 20. The storage unit 23 can store system programs, application programs, information on the charging facility 40 acquired from the server storage unit 33, and the like.

[0030] The storage unit 23 may further store map information for displaying and guiding a route to the charging facility 40. The guidance device 20 may be configured to obtain the map information stored in the storage unit 23 from the server 30 or a server of a generally available map information service, when necessary.

[0031] The storage unit 23 may also store the amount of power when the battery 11 is fully charged. It is known that the amount of power when the battery 11 is fully charged decreases as the battery 11 is repeatedly charged and discharged. The control unit 21 may acquire the amount of power when the battery 11 is fully charged at the present time from a battery control system (BMS) of the battery 11, and store the amount in the storage unit 23. Furthermore, the storage unit 23 may store the specifications of the battery 11 and the battery control system (BMS) mounted on the vehicle 10. The storage unit 23 may hold the amount of charge per unit time to the battery 11 based on the charging output of the charging equipment 41, the charging rate of the battery 11, and other information, in a table format or as an arithmetic expression. The other conditions may include, for example, the temperature, the specifications of the battery 11, and information on the state of deterioration of the battery 11 over time. When the other conditions include information on the temperature, the guidance device 20 is configured to have a temperature sensor or to acquire the output of a temperature sensor provided in the vehicle 10 from the vehicle 10.

[0032] Furthermore, the storage unit 23 may store the charging standard of the vehicle 10 in which the guidance device 20 is installed, and user information regarding a user who uses the guidance device 20. The user information may include information such as a membership-based charging service to which the user subscribes, and a payment method that the user can use. The user information may be registered in advance by the user.

[0033] The position information acquisition unit 24 acquires information on the current position of the vehicle 10 from the position detection unit 12 via a communication network in the vehicle 10. In another embodiment, a sensor for detecting the position may be provided inside the guidance device 20. In that case, the sensor for detecting the position is the position information acquisition unit 24.

[0034] The input unit 25 includes at least one input interface. The input interface is, for example, a physical key such as a keyboard, a capacitive key, a pointing device, or a touch screen integrally provided with a display. The input interface may also be, for example, a microphone that accepts voice input, a camera that accepts image input, or the like. The input unit 25 accepts an operation to input data used for the operation of the guiding device 20. The input unit 25 may be connected to the guiding device 20 as an external input device instead of being provided in the guiding device 20. The user may be able to change various settings, such as the display mode of the charging facilities 40 on the display unit 27 and the number of charging facilities to be displayed, via the input unit 25.

[0035] The output unit 26 includes at least one output interface. The output interface includes the display unit 27. The display unit 27 is, for example, a display that outputs information as a video. The display is, for example, a liquid crystal display (LCD), an organic electro-luminescence (EL) display, an inorganic electro-luminescence (EL) display, or a plasma display panel (PDP), but is not limited to these. The display unit 27 can display the charging facility 40 on a map image based on map information acquired from the memory unit 23 under the control of the control unit 21.

[0036] The output unit 26 further includes a speaker that outputs information by voice. The output unit 26 outputs data received via the communication network 50, data obtained by the operation of the guidance device 20, and the like.

[0037] (Charging facilities) The charging facility 40 is a facility that provides a charging service to the vehicle 10, which is an electric vehicle. As shown in Fig. 1, the charging facility 40 includes one or more charging equipment 41 (chargers) that charges the vehicle 10. The charging facility 40 may be a facility that does not limit users, or a facility that limits users by a membership system or the like. In the charging facility 40, a maximum charging time that can be used for charging using the charging equipment 41 may be specified.

[0038] The charging facility 40 may include an information processing device 42 and provide specifications of the charging service provided by the charging facility 40 to an outside party. Furthermore, the specifications of the charging service of the charging facility 40 may be provided from another external information processing device.

[0039] The charging facility 40 may also include an information processing device 42, and may provide the status of the charging service provided by the charging facility 40 to an external device including the server 30 in real time. The information processing device 42 may support both or either of a push type and a pull type information providing method. For example, the information processing device 42 may provide the waiting time of the charging facility 40 to the outside. In addition, for example, when the maximum charging time is changed depending on the congestion situation, such as shortening the maximum charging time when the charging facility 40 is crowded, the information processing device 42 may be configured to be able to transmit the information to the outside. In addition, when the charging equipment 41 cannot be used or the charging output is reduced for some reason, the information processing device 42 may transmit the information to the outside. Note that the information processing device 42 is not an essential component of the charging facility 40.

[0040] (Example of charging facility display) FIG. 6 is a diagram showing an example of the charging facility 40 displayed on the display unit 27. The display unit 27 may display the charging facility 40 on an image shared with the navigation system. The vehicle image 10A shows the vehicle 10 equipped with the guidance device 20 displayed on a map image. As the vehicle 10 advances on the road Rd, the map image may be scrolled downward in FIG. 6. Charging facility images 40A to 40E showing a plurality of charging facilities 40 located around the vehicle 10 are arranged on the map image. Some of the charging facility images 40A to 40E (for example, the charging facility images 40D and 40E) may not be displayed as described later. The charging facility images 40A to 40E may be displayed as icons that allow the user to understand that they are charging facilities 40. By displaying the charging facility 40 as an icon, the user can easily find the charging facility 40 on the map image.

[0041] In order to display the charging facility 40 on the map image, the control unit 21 of the guidance device 20 determines a target area Ad based on the current location acquired from the position information acquisition unit 24. The target area Ad can be, for example, an area inside a predetermined circumference centered on the current location. The control unit 21 queries the server 30 and extracts the charging facilities 40 located within the target area Ad based on the position information of each charging facility 40 stored in the server storage unit 33. In this manner, it is possible to extract charging facilities 40 located within a predetermined range from the current location of the vehicle 10 that are close in distance. For example, in the example of FIG. 6, a charging facility image 40E corresponding to a charging facility 40 that is relatively far from the vehicle 10 is not subject to extraction and is not displayed or is displayed in an inconspicuous manner. The control unit 21 may acquire information on the extracted charging facility 40 as exemplified in FIG. 4 from the server 30 and store it in the storage unit 23. The target area Ad is not limited to a circular shape. For example, the target area Ad may be an ellipse whose major axis is the traveling direction of the vehicle 10.

[0042] The control unit 21 predicts the recovery amount of the state of charge of the battery 11 when the battery 11 of the mobile body is charged for a predetermined charging time at each charging facility 40. The control unit 21 can use a table or an arithmetic expression stored in the memory unit 23 to estimate the power that is actually charged when the vehicle 10 is connected to a charging facility 41 with a specific charging output, for example, an output of 50 kW. The control unit 21 can estimate the amount of power that is charged to the battery 11 by integrating the power that is charged to the battery 11 over a predetermined time.

[0043] The predetermined time can be set by the user, which makes it possible to predict the recovery amount of the battery state of charge (SOC) when the battery 11 is charged according to the user's schedule.

[0044] Moreover, the predetermined time can be a maximum charging time, which is an upper limit of the charging time at each charging facility 40. This allows the user to predict the recovery amount of the battery state of charge (SOC) when maximum charging is performed at each charging facility 40.

[0045] The control unit 21 can predict the recovery amount of the state of charge of the battery 11, taking into consideration the power consumption required for moving from the current position of the vehicle 10 to each charging facility 40. That is, in predicting the recovery amount of the state of charge, the control unit 21 can subtract the amount of power predicted to be consumed for moving to the charging facility 40 from the amount of power predicted to be charged at the charging facility 40. In this way, it is possible to more accurately predict the recovery amount of the state of charge after actually moving to the charging facility 40 and completing charging.

[0046] In one embodiment, the recovery amount of the battery state of charge (SOC) is expressed as a charging rate relative to a full charge of the battery 11. The control unit 21 changes the display form of the charging facility 40 displayed on the map image according to the predicted value of the recovery amount of the state of charge (SOC). In one embodiment, the control unit 21 sets one or more thresholds for the predicted value of the recovery amount to classify the predicted value of the recovery amount of the state of charge and changes the display form. For example, the control unit 21 may classify the recovery amount of the state of charge into three categories, such as 80% or more, 20% or more and less than 80%, and less than 20%, and may display the charging facility images 40A-40C showing the respective charging facilities 40 in different colors, such as blue, yellow, and red, according to the respective categories. This allows the user to visually grasp the predicted value of the recovery amount of the battery charge rate when using each charging facility 40. In addition to changing the color of the charging facility images 40A-40C, the control unit 21 may also change the brightness or the blinking speed. In addition, by classifying the predicted value of the recovery amount of the charged state using a threshold value, the user can easily grasp the difference between the predicted values ​​of the recovery amount of the charged state.

[0047] Furthermore, the control unit 21 may cause the display unit 27 to display only the charging facilities 40 for which the predicted value of the recovery amount of the charged state is equal to or greater than a predetermined value. For example, the control unit 21 may not need to display the charging facilities 40 for which the predicted value of the recovery amount of the charged state is less than 20%. In this manner, the displayed map image becomes easier for the user to see, making it easier for the user to select the charging facility 40.

[0048] In one embodiment, the control unit 21 may set priorities for the charging facilities 40 based on the positional relationship between the current position of the vehicle 10 and the road Rd on which the vehicle 10 travels, and may cause the display unit 27 to preferentially display charging facilities 40 with higher priorities. For example, the control unit 21 causes the display unit 27 to display charging facility images 40A-40C of a predetermined number of charging facilities 40 in the target area Ad, starting from the highest priority. For example, if the predetermined number is set to 3, charging facility images 40D corresponding to charging facilities 40 with the fourth or higher priority from the highest priority are not displayed. In this manner, the charging facilities 40 to be displayed to the user can be limited, making it easier for the user to make a selection.

[0049] For example, in a road Rd extending linearly as shown in FIG. 7, the priority of the charging facility 40 located in the area A1 on the side of the traffic section where the vehicle 10 travels in the traveling direction of the vehicle 10 (the left side in FIG. 7) can be set high. In such a case, the vehicle 10 can easily enter the charging facility 40. In addition, the priority of the charging facility 40 located in the area A2 on the opposite side of the traffic section where the vehicle 10 travels in the traveling direction of the vehicle 10 (the right side in FIG. 7) is set lower than that of the charging facility 40 located in the area A1 because the charging facility 40 must cross an oncoming lane to enter. Furthermore, the priority of the charging facilities 40 located in the areas A3 and A4 on the opposite side of the traveling direction of the vehicle 10 is set even lower. In such a case, the vehicle 10 needs to go back along the road Rd to enter the charging facility 40.

[0050] Furthermore, the control unit 21 may obtain information on road structure from the map information stored in the storage unit 23, and determine the priority according to the obtained information on the road structure.

[0051] For example, as shown in Fig. 8, if road Rd is a two-lane road and a right turn is required to enter charging facility 40, the priority is lower than if road Rd is a one-lane road. Furthermore, if road Rd has a median strip, it is not possible to turn right to enter charging facility 40, and the priority of charging facility 40 is further lower.

[0052] The control unit 21 may further obtain traffic information for the road Rd on which the vehicle 10 is traveling, and determine the priority according to the traffic information. The traffic information can be obtained from traffic information providers via the communication network 50. The traffic information providers include government agencies in charge of traffic management, road managers, and businesses that provide traffic information.

[0053] The control unit 21 may set a low priority for charging facilities 40 that are congested on the route, based on congestion information for road Rd included in the traffic information. Furthermore, on the two-lane road shown in FIG. 8, if the oncoming lane is congested, it may be difficult for the vehicle 10 to turn right and enter the charging facility 40. Therefore, in such a case, the priority of the charging facility 40 may be set even lower. As described above, by setting the priority, charging facilities 40 that are easy for the user to use are displayed on the map image of the display unit 27, improving the convenience for the user.

[0054] In one embodiment, the control unit 21 extracts only the charging facilities 40 that can be used by the vehicle 10 and displays them on the display unit 27. This makes it possible to avoid the vehicle 10 going to a charging facility 40 that cannot be used by the vehicle 10.

[0055] For example, the control unit 21 checks whether the charging standard of the charging facility 40 stored in the memory unit 23 complies with the charging standard of the vehicle 10, and displays the charging facility 40 on the display unit 27 only if it complies.

[0056] Furthermore, the control unit 21 checks whether or not the payment method available to the user of the vehicle 10 that has been registered in advance can be used for payment at the charging facility 40, and displays the charging facility 40 on the display unit 27 only if the payment method is available to the user. The control unit 21 checks the payment method for the charging facility 40 stored in the memory unit 23 against the payment methods available to the user to determine whether or not the charging facility 40 can be used.

[0057] As described above, according to this embodiment, the recovery amount of the battery charging rate when each charging facility 40 is used can be visually grasped on the map image displayed on the display unit 27. Furthermore, since the charging facilities 40 to be displayed are selected based on the convenience and availability of the user, it becomes easy for the user to select the charging facility 40.

[0058] (Procedure for providing information on charging facilities) Next, the process executed by the control unit 21 of the guidance device 20 will be described based on the flowchart of Fig. 9. The flowchart of Fig. 9 corresponds to the guidance method of the present disclosure for the charging facility 40 executed by the control unit 21. The guidance method disclosed in this specification can be executed by a processor included in the control unit 21 according to a program. Such a program can be stored in a non-transitory computer-readable medium. Examples of the non-transitory computer-readable medium include, but are not limited to, a hard disk, a RAM, a ROM, a flash memory, a CD-ROM, an optical storage device, a magnetic storage device, and the like.

[0059] The control unit 21 acquires information on the current position of the vehicle 10 by the position information acquisition unit 24 (S01).

[0060] The control unit 21 extracts charging facilities 40 located within an area based on the current position of the vehicle 10 (S02).

[0061] The control unit 21 predicts the recovery amount of the state of charge of the battery 11 when the battery 11 of the vehicle 10 is charged for a predetermined charging time in the charging facility 40 (S03).

[0062] The control unit 21 determines the charging facility 40 to be displayed based on various conditions (S04). The various conditions may include one or more conditions related to a predicted recovery amount of the state of charge, a positional relationship between the vehicle 10 and the road Rd and the charging facility 40, a road structure, and availability of the charging facility 40 by a user. Step S04 may be executed before step S03.

[0063] The control unit 21 changes the display form of the charging facility 40 displayed on the map image of the display unit 27 according to the predicted value of the recovery amount of the charged state (S05).

[0064] In this way, since the multiple charging facilities 40 are displayed in different modes according to the predicted value of the recovery amount of the charging state, the user can easily select the charging facility 40 from the display unit 27. When the user selects the charging facility 40, the guidance device 20 may guide the vehicle 10 to the selected charging facility 40 by using, for example, a function of a navigation system.

[0065] The present invention is not limited to the above-described embodiment, and many variations or modifications are possible. For example, the functions included in each means, step, etc. can be rearranged so as not to cause logical inconsistencies, and multiple means or steps can be combined into one or divided.

[0066] For example, in the above embodiment, the server 30 collects information on the charging facilities 40, and determines the charging facilities 40 to be displayed by the guiding device 20 and the display form of the facilities. However, the server 30 and the guiding device 20 can share functions in any form. For example, the server control unit 31 of the server 30 may execute part of the processing performed by the control unit 21 of the guiding device 20. Also, the server 30 may not be required, and the guiding device 20 may collect information on the charging facilities 40 and store the information in the storage unit 23.

[0067] Some of the embodiments of the present disclosure will be described below as examples. However, it should be noted that the embodiments of the present disclosure are not limited to these examples. [Appendix 1] A guidance device that provides guidance to a charging facility, a location information acquisition unit that acquires information on a current location of a moving object; A display unit configured to be able to display the charging facility; a control unit configured to extract charging facilities located within an area based on the current location, predict a recovery amount of the state of charge of the battery expressed as a charging rate relative to a full charge of the battery when the battery of the mobile body is charged for a predetermined charging time at the charging facility, and change a display form of the charging facility displayed on the display unit according to the predicted value of the recovery amount of the state of charge; A guidance device comprising: [Appendix 2] In the guidance device described in Supplementary Note 1, the display unit is configured to be able to display the charging facility on a map image, and changes a display form of the charging facility displayed on the map image. [Appendix 3] The guidance device according to supplementary note 1 further comprises an input unit that enables a user of the moving object to set the predetermined charging time. [Appendix 4] In the guidance device described in Supplementary Note 1, the control unit acquires information on an upper limit value of a charging time set in the charging facility, and sets the upper limit value of the charging time as the predetermined charging time. [Appendix 5] In the guidance device according to any one of Supplementary Notes 1 to 4, the control unit causes the display unit to display the charging facility as an icon. [Appendix 6] In the guiding device according to supplementary note 5, the control unit changes a color of the icon based on the predicted value of the recovery amount. [Appendix 7] In the guidance device according to any one of Supplementary Notes 1 to 6, the control unit provides guidance to the charging facility located within a predetermined range from the current position of the moving object. [Appendix 8] In the guidance device described in any one of Supplementary Notes 1 to 7, the control unit sets priorities for the charging facilities based on a positional relationship between the current position of the moving body and a road on which the moving body is traveling, and causes the display unit to preferentially display the charging facilities with high priorities. [Appendix 9] In the guidance device described in Supplementary Note 8, the control unit sets a high priority to a charging facility located on a side of a traffic segment in a traveling direction of the moving object through which the moving object passes. [Appendix 10] In the guidance device according to Supplementary Note 8 or 9, the control unit obtains information on a road structure of a road on which the moving object travels, and determines the priority according to the information on the road structure. [Appendix 11] In the guidance device according to any one of Supplementary Notes 8 to 10, the control unit obtains traffic information of a road on which the moving object is traveling, and determines the priority according to the traffic information. [Appendix 12] In the guidance device according to any one of Supplementary Notes 1 to 11, the control unit causes the display unit to display only the charging facilities for which the predicted value of the recovery amount is equal to or greater than a predetermined value. [Appendix 13] In the guidance device according to any one of Supplementary Notes 1 to 12, the control unit predicts the recovery amount of the state of charge of the battery in consideration of power consumption required for the moving object to move from the current position to the charging facility. [Appendix 14] In the guidance device according to any one of Supplementary Notes 1 to 13, the control unit extracts only the charging facilities available to the moving object. [Appendix 15] In the guidance device described in any of Supplementary Notes 1 to 14, the control unit checks whether the charging standard of the charging facility complies with the charging standard of the mobile body, and displays the charging facility on the display unit only if it complies. [Appendix 16] In the guidance device described in any of Appendices 1 to 15, the control unit checks whether a payment method available to the user of the mobile object can be used for payment at the charging facility, and displays the charging facility on the display unit only if it is available. [Appendix 17] A guidance method executed by a control unit of a guidance device that provides guidance to a charging facility, Obtaining information on a current location of a mobile object; Extracting charging facilities located within an area based on the current location; predicting a recovery amount of the state of charge of the battery expressed as a charging rate relative to a full charge of the battery when the battery of the mobile object is charged for a predetermined charging time at the charging facility; displaying the charging facility in a different display form on a display unit according to the predicted value of the recovery amount of the state of charge; A guidance method including: [Appendix 18] In the guidance method described in Supplementary Note 17, the predetermined charging time is set by a user of the moving object via an input unit. [Appendix 19] In the guidance method described in Supplementary Note 17 or 18, the control unit acquires information on an upper limit value of a charging time set in the charging facility, and sets the upper limit value of the charging time as the predetermined charging time. [Appendix 20] On the computer, Obtaining information on a current location of a mobile object; Extracting charging facilities located within an area based on the current location; predicting a recovery amount of the state of charge of the battery expressed as a charging rate relative to a full charge of the battery when the battery of the mobile object is charged for a predetermined charging time at the charging facility; displaying the charging facility in a different display form on a display unit according to the predicted value of the recovery amount of the state of charge; A program that executes a process including: [Explanation of symbols]

[0068] 1 Guidance system 11 Battery 12 Position detection unit 10 Vehicles (moving objects) 10A Vehicle image 20 Guidance device 21 Control section 22 Communications Department 23 Memory section 24 Location information acquisition section 25 Input section 26 Output section 27 Display section 30 Servers 31 Server control unit 32 Server Communication Section 33 Server memory section 40 Charging facilities 50 Communication Network 41A~41E Charging facility images Ad Display target area A1 1st area Area 2 of A2 Area 3 of A3 Area 4 of A4 Rd Road

Claims

1. A guidance device that provides guidance to a charging facility, a location information acquisition unit that acquires information on a current location of a moving object; A display unit configured to be able to display the charging facility; a control unit configured to extract charging facilities located within an area based on the current location, predict a recovery amount of the state of charge of the battery expressed as a charging rate relative to a full charge of the battery when the battery of the mobile body is charged for a predetermined charging time at the charging facility, and change a display form of the charging facility displayed on the display unit according to the predicted value of the recovery amount of the state of charge; A guidance device comprising:

2. The guidance device according to claim 1 , wherein the display unit is configured to be able to display the charging facility on a map image, and changes a display form of the charging facility displayed on the map image.

3. The guidance device according to claim 1 , further comprising an input unit that enables a user of the mobile object to set the predetermined charging time.

4. The guidance device according to claim 1 , wherein the control unit acquires information on an upper limit value of a charging time set in the charging facility, and sets the upper limit value of the charging time as the predetermined charging time.

5. The guidance device according to claim 1 , wherein the control unit causes the display unit to display the charging facility as an icon.

6. The guiding device according to claim 5 , wherein the control unit changes a color of the icon based on the predicted value of the recovery amount.

7. The guidance device according to claim 1 , wherein the control unit provides guidance to the charging facility located within a predetermined range from the current position of the mobile object.

8. 2. The guidance device according to claim 1, wherein the control unit sets priorities for the charging facilities based on a positional relationship between the current position of the mobile body and a road on which the mobile body travels, and causes the display unit to preferentially display the charging facilities with high priorities.

9. The guidance device according to claim 8 , wherein the control unit sets a high priority to a charging facility located on a side of a traffic segment in a traveling direction of the mobile body through which the mobile body passes.

10. The guidance device according to claim 8 , wherein the control unit acquires information on a road structure of a road on which the mobile object travels, and determines the priority in accordance with the information on the road structure.

11. The guidance device according to claim 8 , wherein the control unit acquires traffic information of a road on which the mobile object travels, and determines the priority in accordance with the traffic information.

12. The guidance device according to claim 1 , wherein the control unit causes the display unit to display only the charging facilities in which the predicted value of the recovery amount is equal to or greater than a predetermined value.

13. The guidance device according to claim 1 , wherein the control unit predicts the recovery amount of the state of charge of the battery in consideration of power consumption required for the moving object to move from the current position to the charging facility.

14. The guidance device according to claim 1 , wherein the control unit extracts only the charging facilities that are available to the mobile object.

15. The guidance device according to claim 1 , wherein the control unit checks whether a charging standard of the charging facility complies with a charging standard of the mobile object, and causes the display unit to display the charging facility only when the charging standard complies.

16. The guidance device according to claim 1 , wherein the control unit checks whether a payment method available to a user of the mobile object is available for payment at the charging facility, and causes the display unit to display the charging facility only if the payment method is available.

17. A guidance method executed by a control unit of a guidance device that provides guidance to a charging facility, Obtaining information on a current location of a mobile object; Extracting charging facilities located within an area based on the current location; predicting a recovery amount of the state of charge of the battery expressed as a charging rate relative to a full charge of the battery when the battery of the mobile object is charged for a predetermined charging time at the charging facility; displaying the charging facility in a different display form on a display unit according to the predicted value of the recovery amount of the state of charge; A guidance method including:

18. The guidance method according to claim 17 , wherein the predetermined charging time is set by a user of the mobile object via an input unit.

19. The guidance method according to claim 17 , wherein the control unit acquires information on an upper limit value of a charging time set in the charging facility, and sets the upper limit value of the charging time as the predetermined charging time.

20. On the computer, Obtaining information on a current location of a mobile object; Extracting charging facilities located within an area based on the current location; predicting a recovery amount of the state of charge of the battery expressed as a charging rate relative to a full charge of the battery when the battery of the mobile object is charged for a predetermined charging time at the charging facility; displaying the charging facility in a different display form on a display unit according to the predicted value of the recovery amount of the state of charge; A program that executes a process including:

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