JP2011217462A - Device and method for supporting charging for vehicle, and computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charge supporting device for a vehicle, a charge supporting method for a vehicle, and a computer program, capable proposing materials for comparison between charging at a present position and charging at a position having excellent charging efficiency after changing the position in consideration of a facility where a vehicle parks.SOLUTION: A navigator identifies charge efficiency at the present position Ca (S3). The navigator identifies a more efficient optimum position (S4), and identifies the optimum charge efficiency Cb at the optimum position (S5). The navigator obtains the type of the facility where an own vehicle is located (S6) on the basis of the present position information, and obtains a reference value corresponding to the type of the facility (S7). The navigator display a charge position guide screen on the basis of a value obtained by subtracting the charge efficiency Ca from the optimum charge efficiency Cb and the reference value determined in accordance with the type of the facility (S9, S10).

Description

  The present invention relates to a vehicle charging support apparatus, a vehicle charging support method, and a computer program that support charging of a vehicle battery using a power feeding unit and a power receiving unit.

  In recent years, there are many electric vehicles such as an electric vehicle using a motor driven based on electric power supplied from a battery as a drive source, and a hybrid vehicle using a motor and an engine together as a drive source.

  Further, as one of such vehicle battery charging methods, non-contact power feeding is performed on a power receiving unit disposed on the vehicle by a power feeding unit disposed outside the vehicle (for example, on the road surface of a parking lot). A method for charging the battery by performing the method is known. In the case of this method, in order to charge the battery efficiently, it is important that the power receiving unit and the power feeding unit have an appropriate positional relationship.

  In view of this point, the invention described in Patent Document 1 has been made. The power reception guide device described in Patent Document 1 notifies the charging efficiency of the battery at the current position when parking in the parking area in which the power feeding device is disposed is completed. Thereby, the said charge guidance apparatus can provide the judgment reference | standard of how suitable the present parking position is for charge of a battery. Further, the power reception guide device notifies a parking position with better charging efficiency than the current position. Thereby, the said power reception guidance apparatus can charge the battery in a position with more efficient charging.

Japanese Patent Application No. 2009-290389

  Here, as in Patent Document 1, when the battery is charged during parking, the amount of charge of the battery varies depending on the length of the parked period. Therefore, even if the current position is changed to a position with good charging efficiency, if the parking period is short, the remaining battery level at the end of the parking period may hardly change. Moreover, parking time shows a certain tendency according to facilities. In this case, since the user is forced to move from the charging position to a position with good charging efficiency, it is better to charge at the current position than to improve charging efficiency by changing the position. There is a good possibility.

  The present invention has been made in view of the above-mentioned problems, and in consideration of the facility where the vehicle is parked, a comparison material between charging at the current position and charging at a position with good charging efficiency by changing the position is provided. A vehicle charging support device, a vehicle charging support method, and a computer program that can be presented are provided.

  The vehicle charging support device (1) according to claim 1 of the present invention provides a current position acquisition means (13) for acquiring a current position of a host vehicle having a power receiving unit used for charging a battery, and the power receiving unit. A power supply unit detecting means (13) for detecting a power supply unit that performs non-contact power supply, an optimal position specifying means (13) for specifying an optimal position where the state of charge of the battery by the power supply unit is optimal, and a current position Based on the current position of the host vehicle and the storage means (12) for storing the battery charge and the reference value for evaluating the battery charge at the optimum position in association with each facility, the position of the host vehicle is determined. The reference value selection means (13) for selecting a reference value corresponding to the facility to be operated, and the reference value selected by the reference value selection means, the bar at the current position is used. And charging Terri, evaluated regarding charging of the battery at the optimum position, the charging position evaluation means for notifying the evaluation result (13), characterized in that it has a.

  The vehicle charging support device (1) according to claim 2 is the vehicle charging support device according to claim 1, wherein the charging position evaluation means (13) is selected by the reference value selection means. Charging the battery at the current position by comparing a charge amount of the battery per predetermined time at the current position with a charge amount of the battery per predetermined time at the optimal position using a reference value; Evaluation regarding the charging of the battery at the optimum position is performed.

The vehicle charging support device (1) according to claim 3 is the vehicle charging support device according to claim 1 or 2, wherein the reference value is determined based on a staying time at the facility. It is characterized by being.

  Further, the vehicle charging support device (1) according to claim 4 is the vehicle charging support device according to any one of claims 1 to 3, wherein the charging position evaluation means (13) Charging the battery at the current position by comparing the comparison value of the charge amount per unit time with the charge value per unit time at the current position with the reference value selected by the reference value selection means And evaluating the charging of the battery at the optimum position.

  The vehicle charging support device (1) according to claim 5 is the vehicle charging support device according to claim 4, wherein the reference value is smaller as the staying time at the facility is longer. It is characterized by that.

  The vehicle charging support device (1) according to claim 6 is the vehicle charging support device according to any one of claims 1 to 3, wherein the reference value is a time spent in the facility. The charging position evaluation means (13) calculates a first remaining battery level at the time when the stay time based on the reference value has elapsed based on a condition for charging the battery at the current position; Based on conditions for charging the battery at the optimum position, a second battery remaining amount at the time when the stay time based on the reference value has elapsed is calculated, and the first battery remaining amount and the second battery remaining amount are calculated. By comparing the charging of the battery at the current position and the charging of the battery at the optimal position.

  The vehicle charging support device (1) according to claim 7 is the vehicle charging support device according to claim 6, wherein the battery remaining amount acquisition means (13) for acquiring the remaining amount of the battery; Power consumption estimation means (13) for estimating the power consumption consumed with the movement from the current position to the optimum position, and the charging position evaluation means (13) The second battery remaining amount is calculated based on a state in which the power consumption is subtracted.

  Further, the vehicle charging support device (1) according to claim 8 is the vehicle charging support device according to claim 7, wherein the charging position evaluation means (13) is configured such that the first battery remaining amount is predetermined. When the charge amount is equal to or greater than a target charge amount, the evaluation regarding charging of the battery at the current position and charging of the battery at the optimal position is stopped.

  The vehicle charging support device (1) according to claim 9 is the vehicle charging support device according to any one of claims 1 to 8, wherein the charge state specifying means (13) Based on the position of the power receiving unit and the position of the power supply unit, the state of charge of the battery by the power supply unit at the current position is specified, and the optimum position specifying means (13) includes the position of the power reception unit and the power supply unit. The optimum position is specified based on the position of the unit.

  The vehicle charging support device (1) according to claim 10 is the vehicle charging support device according to any one of claims 1 to 9, wherein the state of charge of the battery is determined by the power supply unit. It is characterized by the charging efficiency of the battery.

  In the vehicle charging support method according to claim 11, a current position acquisition step of acquiring a current position of the host vehicle having a power receiving unit used for charging a battery, and power feeding that performs non-contact power feeding to the power receiving unit. A power supply unit detecting step for detecting a unit; an optimal position specifying step for specifying an optimal position where the battery charging state by the power supply unit is best; charging the battery at the current position; and charging the battery at the optimal position. A reference value selection step for selecting a reference value corresponding to the facility where the host vehicle is located, based on the current position of the host vehicle, from the reference value stored in association with each facility in the storage means for evaluation And charging the battery at the current position using the reference value selected by the reference value selection step; Evaluated regarding charging of the battery in serial optimum position, and having a charging position evaluation step of notifying the evaluation results.

  Furthermore, the computer program according to claim 12 is installed in a computer and acquires a current position of a host vehicle having a power receiving unit used for charging a battery, and non-contact power feeding to the power receiving unit. A power supply unit detection function for detecting a power supply unit to be performed; an optimal position specifying function for specifying an optimal position where the charging state of the battery by the power supply unit is best; charging of the battery at the current position; and charging of the battery at the optimal position Reference value for selecting a reference value corresponding to the facility where the host vehicle is located based on the current position of the host vehicle from the reference value stored in association with each facility in the storage means in order to evaluate charging Using the selection function and the reference value selected by the reference value selection function, charging of the battery at the current position is performed. If, evaluated regarding charging of the battery at the optimum position, characterized in that to execute a charging position evaluation function of notifying the evaluation results.

  The charging support apparatus for a vehicle according to claim 1 selects a reference value corresponding to a facility where the host vehicle is located, and uses the reference value to charge the battery at the current position and move from the current position to the optimum position. The battery charging performed at the optimum position is evaluated, and the evaluation result is notified. Therefore, the vehicle charging support apparatus can provide the user with a material for determining whether or not it is necessary to change the position from the current position to the optimum position in consideration of the facility where the host vehicle is located.

  The charging support device for a vehicle according to claim 2 uses the reference value corresponding to the facility where the host vehicle is located to charge the battery per predetermined time at the current position and charge the battery per predetermined time at the optimum position. The amount is compared and evaluated. Therefore, the charging support device for a vehicle can perform more appropriate evaluation for charging the battery at the current position, moving from the current position to the optimum position, and charging the battery at the optimum position.

  The vehicle charging support apparatus according to claim 3, wherein the reference value is determined based on a staying time at the facility. Therefore, the charging support device for a vehicle considers the staying time in the facility where the host vehicle is located, charges the battery at the current position, moves from the current position to the optimum position, and charges the battery at the optimum position. Can be evaluated more appropriately.

  The charging support device for a vehicle according to claim 4, wherein a comparison value between a charging amount per unit time at an optimum position and a charging amount per unit time at the current position, and a reference value corresponding to a facility where the own vehicle is located, , The battery charging at the current position and the battery charging at the optimum position are evaluated. Therefore, the charging support device for a vehicle can perform more appropriate evaluation for charging the battery at the current position, moving from the current position to the optimum position, and charging the battery at the optimum position.

  6. The vehicle charging support apparatus according to claim 5, wherein the reference value is a smaller value as the staying time at the facility is longer. Therefore, the vehicle charging support apparatus is currently used in terms of the amount of charge per unit time. When evaluating charging at a position and charging accompanied by movement to an optimal position, more appropriate evaluation can be performed.

  The vehicle charging support apparatus according to claim 6, wherein the reference value indicates a staying time in the facility. Then, the vehicle charging support apparatus evaluates the charging of the battery at the current position and the charging of the battery accompanying the movement to the optimal position from the viewpoint of the remaining battery level when the stay time indicated by the reference value has elapsed. Therefore, the charging support device for a vehicle can perform more appropriate evaluation for charging the battery at the current position, moving from the current position to the optimum position, and charging the battery at the optimum position.

  The charging support device for a vehicle according to claim 7 calculates the remaining battery level at the optimum position when the staying time according to the reference value has elapsed, based on a state in which the amount of power consumption is subtracted from the current remaining battery level. . Therefore, since the vehicle charging support apparatus can take into account the consumption of the remaining battery amount due to the movement from the current position to the optimum position, the battery is charged at the current position and moved from the current position to the optimum position. The battery charging performed at the optimum position can be further appropriately evaluated.

  The charging support device for a vehicle according to claim 8, wherein when the stay time according to the reference value elapses, the battery charging at the current position and the battery charging at the optimum position are performed when the charging is greater than the target charging amount. Cancel the evaluation. Therefore, when the user's target can be achieved by charging at the current position, the vehicle charging support apparatus can reduce the processing burden by stopping the evaluation.

  According to a ninth aspect of the present invention, the vehicle charging support device identifies the battery charging state at the current position and the battery charging state at the optimum position based on the position of the power receiving unit and the position of the power feeding unit. Therefore, the charging support apparatus for a vehicle can specify the state of charge of the battery at the current position and the state of charge of the battery at the optimum position by a simpler method.

  The charging support device for a vehicle according to claim 10, wherein the charging state of the battery is charging efficiency of the battery by the power feeding unit. Therefore, the vehicle charging support apparatus considers the facility where the host vehicle is located, and uses a clearer material for comparing charging at the current position and charging with movement to the optimal position. Can be provided to.

  12. The vehicle charging support method according to claim 11, wherein the charging of the battery at the current position and the charging of the battery at the optimal position after moving from the current position to the optimal position correspond to the facility where the host vehicle is located. Is evaluated and the evaluation result is notified. Therefore, the vehicle charging support method can provide the user with a material for determining whether or not it is necessary to change the position from the current position to the optimum position in consideration of the facility where the host vehicle is located.

  According to the computer program of the twelfth aspect, the charging of the battery at the current position and the charging of the battery at the optimal position after moving from the current position to the optimal position are the reference values corresponding to the facility where the host vehicle is located. The evaluation result is notified. Therefore, the computer program can be executed by a computer to provide a user with a material for determining whether or not a position change from the current position to the optimum position is necessary in consideration of the facility where the host vehicle is located.

It is the block diagram which showed the navigation apparatus. It is a flowchart of the charge position guidance process program which concerns on 1st Embodiment. It is explanatory drawing which shows an example of the condition at the time of battery charge in a present position. It is explanatory drawing which shows an example of a charging efficiency map. It is explanatory drawing which shows the condition at the time of battery charge in an optimal position. It is explanatory drawing which shows an example of a reference value table. It is explanatory drawing which shows the relationship between the battery residual amount and time which concerns on 1st Embodiment. It is explanatory drawing of the charge position guidance screen which recommends the optimal position which concerns on 1st Embodiment. It is explanatory drawing of the charge position guidance screen which recommends the present position which concerns on 1st Embodiment. It is a flowchart of the charge position guidance process program which concerns on 2nd Embodiment. It is explanatory drawing which shows the relationship between the battery residual amount and time which concerns on 2nd Embodiment. It is explanatory drawing of the charge position guidance screen which recommends charge in the optimal position which concerns on 2nd Embodiment. It is explanatory drawing of the charge position guidance screen which recommends the charge in the present position which concerns on 2nd Embodiment.

(First embodiment)
Hereinafter, a vehicle charging support apparatus and the like according to the present invention will be described in detail with reference to the drawings based on an embodiment (first embodiment) embodied in a navigation device. First, a schematic configuration of the navigation device 1 will be described with reference to FIG.

  As shown in FIG. 1, the navigation apparatus 1 includes a current position detection unit 11 that detects a current position of a vehicle, a data recording unit 12 that records various data, and various calculations based on input information. A navigation ECU 13 that performs processing, an operation unit 14 that receives an operation from a user, a liquid crystal display 15 that displays a guide route to a map and a destination for the user, a speaker 16 that outputs voice guidance regarding route guidance, It comprises a DVD drive 17 that reads a DVD that is a storage medium storing a program, and a communication module 18 that communicates with an information center such as a traffic information center. Further, the navigation apparatus 1 charges the battery 55 by non-contact power feeding between a battery 55 for supplying power to a motor (not shown) that is a drive source of the host vehicle 60 and a power feeding unit 65 described later. The power receiving unit 50 is connected.

  Below, each component which comprises the navigation apparatus 1 is demonstrated in order. The current position detection unit 11 includes a GPS 21, a vehicle speed sensor 22, a steering sensor 23, a gyro sensor 24, an altimeter (not shown), and the like, and detects a current vehicle position, direction, vehicle traveling speed, and the like. Here, in particular, the vehicle speed sensor 22 is a sensor for detecting a moving distance and a vehicle speed of the vehicle, generates a pulse according to the rotation of the wheel of the vehicle, and outputs a pulse signal to the navigation ECU 13. And navigation ECU13 calculates the rotational speed and moving distance of a wheel by counting the generated pulse. Note that the navigation device 1 does not have to include all of the four types of sensors, and the navigation device 1 may include only one or more of these types of sensors.

  The data recording unit 12 includes an external storage device and a hard disk (not shown) as a recording medium, and a recording head (not shown) that is a driver for reading and writing predetermined data to the hard disk. The hard disk stores a map information DB 31, a power receiving unit position information 32, a charging efficiency map 33, and a reference value table 34.

  Here, the map information DB 31 records various map data necessary for route guidance, traffic information guidance, and map display. Specifically, the map data includes link data relating to road (link) shapes, node data relating to node points, POI data which is information relating to points such as facilities, intersection data relating to each intersection, search data for searching for routes, It is composed of search data for searching points, image drawing data for drawing images such as maps, roads, traffic information and the like on the liquid crystal display 15. The map information DB 31 is updated based on update data distributed from a map distribution center or the like and update data provided via a storage medium (for example, a DVD or a memory card).

  The power receiving unit position information 32 is information indicating an arrangement position of the power receiving unit 50 in the host vehicle 60. The power receiving unit position information 32 is referred to when specifying an optimum position and charging efficiency described later. The charging efficiency map 33 shows the relationship between the distance between the power receiving unit 50 and the power supply unit 65 (hereinafter referred to as offset amount) and the charging efficiency of the battery 55 (see FIG. 4). The charging efficiency map 33 is referred to when specifying charging efficiency to be described later. The details of the charging efficiency map 33 will be described later. The reference value table 34 is a table in which a reference value and an estimated stay time Ts are associated with each facility type. The reference value table 34 is referred to when charging at the current position and charging when moving to the optimum position are evaluated by a charging position guidance processing program (see FIGS. 2 and 10) described later. The reference value table 34 will be described in detail later with reference to the drawings.

  On the other hand, the navigation ECU (Electronic Control Unit) 13 performs a guidance route setting process for setting a guidance route from the current position to the destination when a destination is selected, and a charging position guidance process (FIG. 2 etc.) described later. This is an electronic control unit that performs overall control of the navigation device 1 (see FIG. 6). The navigation ECU 13 is a CPU 41 as an arithmetic device and a control device, and a RAM 42 that is used as a working memory when the CPU 41 performs various arithmetic processes, and stores route data when a route is searched, In addition to a control program, an internal storage device such as a ROM 43 in which a charging position guidance processing program (see FIGS. 2 and 10) described later is recorded, and a flash memory 44 that stores a program read from the ROM 43 is provided.

  The operation unit 14 is operated when inputting a departure point as a travel start point and a destination as a travel end point, and includes a plurality of operation switches (not shown) such as various keys and buttons. Then, the navigation ECU 13 performs control to execute various corresponding operations based on switch signals output by pressing the switches. In addition, it can also be comprised by the touchscreen provided in the front surface of the liquid crystal display 15.

  The liquid crystal display 15 includes a map image including a road, traffic information, operation guidance, operation menu, key guidance, guidance route from the departure point to the destination, guidance information along the guidance route, news, weather forecast, time, Mail, TV programs, etc. are displayed. The liquid crystal display 15 displays a charging position guide screen 80 and the like (see FIGS. 8 and 9), which will be described later, based on the charging position guide processing program (see FIG. 2 and the like).

  The speaker 16 outputs voice guidance for guiding traveling along the guidance route based on an instruction from the navigation ECU 13 and guidance voice for traffic information.

  The DVD drive 17 is a drive that can read data recorded on a recording medium such as a DVD or a CD. Then, the map information DB 31 is updated based on the read data.

  The communication module 18 receives traffic information including traffic information, regulation information, traffic accident information, and the like transmitted from a traffic information center such as a VICS (registered trademark: Vehicle Information and Communication System) center or a probe center. For example, a mobile phone or a DCM corresponds to the communication device. The communication module 18 is used when acquiring position information of the power supply unit 65 by communicating with the power supply unit 65 (see FIGS. 3 and 5) embedded in the parking frame 70 of the parking lot.

  The power reception unit 50 is disposed at a predetermined position on the bottom surface of the host vehicle 60 and performs non-contact power supply with a power supply unit 65 (see FIGS. 3 and 5) embedded in the parking frame 70. The power receiving unit 50 has a charging unit (not shown), and charges the battery 55 with the power received from the power supply unit 65 via the charging unit.

  The battery 55 is a secondary battery that can be repeatedly charged and discharged, and a lead storage battery, a nickel cadmium battery, a nickel hydrogen battery, a lithium ion battery, a sodium sulfur battery, or the like is used. The battery 55 supplies power to a motor (not shown) that is a drive source of the host vehicle 60. Further, the battery 55 stores power supplied by non-contact power feeding between the power receiving unit 50 and the power feeding unit 65. As shown in FIG. 2, the battery 55 is connected to the navigation ECU 13. Therefore, the navigation ECU 13 can acquire the amount of power stored in the battery 55 (for example, the remaining battery level Ep described later).

  Next, a charging position guidance processing program executed in the navigation device 1 will be described in detail with reference to FIG. The charging position guidance processing program stores the current parking position (hereinafter referred to as the current position) of the host vehicle 60 and the battery 55 from the current position after the host vehicle 60 is parked in the parking frame 70 in which the power supply unit 65 is embedded. This is a program for performing guidance related to charging of the battery 55 in consideration of the facility where the host vehicle 60 is parked at the optimal position with good charging efficiency. FIG. 2 is a flowchart of the charging position guidance processing program according to the first embodiment.

  As shown in FIG. 3, the charging position guidance processing program has a parking frame 70 drawn on the road surface, and the vehicle is installed in a parking lot of a certain facility in which the power supply unit 65 is embedded in the ground in the parking frame 70. This is executed by the CPU 41 when 60 enters and parking in the desired parking frame 70 is completed by reverse parking. Completion of parking can be determined based on, for example, that the shift lever is in the parking position, the side brake is being used, and the like.

  Here, the power feeding unit 65 performs non-contact power feeding with the power receiving unit 50 as described above. Here, as a specific method of non-contact power feeding, there is a method using mutual induction generated between two coils. In the case of this method, a magnetic field change is generated by applying a high-frequency current to the primary coil on the power supply unit 65 side, and an induced current is generated on the secondary coil on the power receiving unit 50 side. Thereby, non-contact power feeding from the power feeding unit 65 to the power receiving unit 50 is realized.

  The power supply unit 65 includes a communication module (not shown), and can transmit power supply unit position information to the navigation device 1 via the communication module 18. The power supply unit position information is coordinate information indicating the X coordinate and the Y coordinate of the embedded position of the power supply unit 65, and is stored in a storage device provided in the power supply unit 65. When a current position detection unit such as a GPS is mounted on the power supply unit 65, it is also possible to generate power supply unit position information using the current position detection unit.

  As shown in FIG. 2, in the charging position guidance processing program, first, in S <b> 1, the CPU 41 acquires current position information by the current position detection unit 11. The current position information is generated based on the detection result of the current position detection unit 11 and is coordinate information indicating the X coordinate and the Y coordinate of the current position of the host vehicle 60. After acquiring the current position information, the CPU 41 shifts the process to S2.

  In S <b> 2, the CPU 41 determines whether power can be received by non-contact power feeding from the power feeding unit 65 at the current position. If the power can be received (S2: YES), the CPU 41 shifts the process to S3. On the other hand, if the power cannot be received (S2: NO), the CPU 41 ends the charging position guidance processing program. The case where power cannot be received includes the case where the charging efficiency of the battery 55 at the current position is “0%” and the case where the power supply unit 65 is not operating.

  After shifting to S3, the CPU 41 specifies the charging efficiency Ca of the battery 55 at the current position. Here, the charging efficiency means the amount of charge per unit time by the power supply unit 65. Specifically, first, the CPU 41 communicates with the power supply unit 65 embedded in the parking frame 70 via the communication module 18 to acquire the power supply unit position information of the power supply unit 65. Then, the CPU 41 specifies the position of the power receiving unit 50 in the host vehicle 60 at the current position based on the current position information acquired in S <b> 1 and the power receiving unit position information 32. Subsequently, the CPU 41 calculates an offset amount based on the position of the power receiving unit 50 and the power supply unit position information. The offset amount means a horizontal distance from the power supply unit 65 to the power receiving unit 50. Thereafter, the CPU 41 specifies the charging efficiency Ca of the battery 55 at the current position based on the calculated offset amount and the charging efficiency map 33. After specifying the charging efficiency Ca, the CPU 41 proceeds to S4.

  Here, as shown in FIG. 4, the charging efficiency map 33 defines the relationship between the offset amount and the charging efficiency of the battery 55. In the first embodiment, the battery 55 is charged by mutual induction generated between the coil on the power receiving unit 50 side and the coil on the power supply unit 65 side. Therefore, the charging efficiency of the battery 55 shows the highest value when the offset amount is “0”, and shows a smaller value as the value of the offset amount increases. Therefore, the CPU 41 can specify the charging efficiency of the battery 55 corresponding to the calculated offset amount based on the charging efficiency map 33 (see FIG. 4).

In S4, the CPU 41 specifies the optimum position based on the power feeding unit position information. Here, the optimum position means a parking position in which the charging efficiency of the battery 55 by the non-contact power feeding between the power receiving unit 50 and the power feeding unit 65 is the best.
As described above, the battery 55 is charged by generating a magnetic field change by applying a high-frequency current to the primary coil on the power supply unit 65 side and generating an induced current on the secondary coil on the power reception unit 50 side. Therefore, the charging efficiency of the battery 55 is highest when the central axis of the primary coil on the power supply unit 65 side coincides with the central axis of the secondary coil on the power receiving unit 50 side (see FIG. 4). That is, based on the power supply unit position information and the power reception unit position information 32, the CPU 41 sets a position where the coordinates indicated by the power supply unit position information and the position coordinates of the power reception unit 50 coincide (that is, offset amount = 0) as the optimum position. Specify (see FIG. 5). After specifying the optimum position, the CPU 41 proceeds to S5.

  In S5, the CPU 41 specifies the charging efficiency of the battery 55 at the optimal position (hereinafter referred to as the optimal charging efficiency Cb). The optimum charging efficiency Cb means the maximum charging efficiency (90% in the first embodiment) determined by the configuration of the power supply unit 65 and is specified based on the charging efficiency map 33. After specifying the optimum charging efficiency Cb, the CPU 41 shifts the process to S6.

  After shifting to S6, the CPU 41 specifies the facility type (for example, convenience store, supermarket, movie theater, etc.) of the facility where the host vehicle 60 is located based on the current position information acquired in S1 and the map information DB 31. Specifically, CPU41 performs the map matching process which specifies the present position of the own vehicle 60 on a map based on present position information and the map information memorize | stored in map information DB31, and the own vehicle is located. Identify the facility. Then, the CPU 41 identifies the facility type of the facility by referring to the POI data corresponding to the identified facility. After specifying the facility type, the CPU 41 proceeds to S7.

  In S <b> 7, the CPU 41 specifies a reference value used for evaluating the charging of the battery 55 at the current position and the charging of the battery 55 at the optimal position based on the facility type specified in S <b> 6 and the reference value table 34. After specifying the reference value corresponding to the facility type, the CPU 41 proceeds to S8.

  Here, the reference value table will be described in detail with reference to FIG. As described above, in the reference value table 34, the reference value and the estimated stay time are associated with each facility type. The estimated staying time is set according to the facility type, and an estimated staying time (for example, 150 minutes) according to the purpose of staying at the facility (for example, watching a movie) or the like is set. The reference value means the amount of charge per unit time, and is set corresponding to the facility type. Note that the reference value also corresponds to the estimated staying time, and a smaller value is set as the estimated staying time is longer. This is because when the estimated stay time is long, the difference between the charging efficiency of the battery 55 at the optimum position and the charging efficiency of the battery 55 at the current position greatly affects the charge amount at the time of departure. Conversely, the shorter the estimated stay time, the larger the reference value is set. This is because when the estimated staying time is short, there is no significant difference in the charging amount at the departure unless there is a large difference between the charging efficiency of the battery 55 at the optimal position and the charging efficiency of the battery 55 at the current position.

  In S8, the CPU 41 determines whether or not the difference between the optimum charging efficiency Cb and the charging efficiency Ca is larger than the reference value specified in S7. That is, the CPU 41 performs the determination in S8 by comparing the value obtained by subtracting the charge amount per unit time at the current position from the charge amount per unit time at the optimum position with the reference value specified in S7. When the difference between the optimum charging efficiency Cb and the charging efficiency Ca is larger than the reference value (S8: YES), the CPU 41 shifts the process to S9. On the other hand, when the difference between the optimal charging efficiency Cb and the charging efficiency Ca is equal to or less than the reference value (S8: NO), the CPU 41 proceeds to S10.

  In S9, the CPU 41 outputs that there is a merit of charging the battery 55 by changing the position from the current position to the optimum position. Specifically, the CPU 41 displays a charging position guide screen 80 on the liquid crystal display 15 to notify that there is a merit of charging the battery 55 by changing the position from the current position to the optimum position. After displaying the charging position guide screen 80 (see FIG. 8) on the liquid crystal display 15, the CPU 41 ends the charging position guide processing program.

  In S10, the CPU 41 outputs that there is no merit of charging the battery 55 by changing the position from the current position to the optimum position. That is, the CPU 41 outputs that there is a merit in charging the battery 55 at the current position. Specifically, the CPU 41 displays a charging position guidance screen 80 on the liquid crystal display 15 to notify that there is no merit of charging the battery 55 by changing the position from the current position to the optimum position. After displaying the charging position guide screen 80 (see FIG. 9) on the liquid crystal display 15, the CPU 41 ends the charging position guide processing program.

 Here, when charging at the current position is continued and when moving to the optimal position and charging is performed at the optimal position, a comparison is made in terms of the relationship between the remaining amount of the battery 55 and the elapsed time from the current time. The details of the determination in S8 in the first embodiment will be described in detail with reference to FIG. In FIG. 7, the remaining amount of the battery 55 when the battery 55 is charged at the current position is referred to as “first battery remaining amount Ea”. The battery 55 is moved from the current position to the optimum position, and the battery 55 is charged at the optimum position. When this is done, the remaining amount of the battery 55 is referred to as “second battery remaining amount Eb”.

  As described above, when the charging is continued at the current position, the first battery remaining amount Ea is continuously charged according to the charging efficiency at the current position (that is, the charging efficiency Ca). , The battery remaining amount Ep) increases linearly with the charging efficiency Ca as an inclination (see FIG. 7). On the other hand, when charging the battery 55 at the optimum position, the second battery remaining amount Eb is continuously charged according to the charging efficiency at the optimum position (that is, the optimum charging efficiency Cb). To increase linearly with the optimum charging efficiency Cb as an inclination (see FIG. 7).

  Here, as shown in FIG. 7, when the estimated stay time Ts is short, the second battery remaining amount Eb is larger than the first battery remaining amount Ea at the time when the estimated stay time Ts has elapsed, but is so large. It is not the difference Ds. On the other hand, when the estimated stay time Ts is long, the second battery remaining amount Eb is larger than the first battery remaining amount Ea and has a larger difference Dl when the estimated stay time Ts has elapsed. That is, even if the charging efficiency Ca and the optimal charging efficiency Cb are the same, if the estimated stay time Ts is short, the effect on the difference in the remaining amount of the battery 55 when the estimated stay time Ts has elapsed is small, but the estimated stay time Ts. If it is long, it greatly affects the difference in the remaining amount of the battery 55 when the estimated stay time Ts has elapsed.

  That is, when the estimated stay time Ts is short, the charge amount of the battery 55 per unit time at the optimum position (ie, the optimum charge efficiency Cb) is equal to the charge amount of the battery 55 per unit time at the current position (ie, the charge efficiency Ca). If the position is changed from the current position to the optimal position, there is no difference between the second battery remaining amount Eb and the first battery remaining amount Ea when the stay period has elapsed, and there is no merit of changing the position. . In this respect, in the reference value table 34, a large reference value is associated with a facility type having a short estimated stay time Ts (see FIG. 6). Therefore, by comparing the reference value table 34 with the reference value specified based on the facility type, the navigation device 1 can more accurately evaluate the position change from the current position to the optimum position. .

  On the other hand, when the estimated stay time Ts is long, the charge amount of the battery 55 per unit time at the optimum position (ie, the optimum charge efficiency Cb) is equal to the charge amount of the battery 55 per unit time at the current position (ie, the charge efficiency Ca). If the position is changed from the current position to the optimum position, there is a large difference between the second battery remaining amount Eb and the first battery remaining amount Ea when the stay period has elapsed, and there is an advantage of performing the position change. Arise. As shown in FIG. 6, in the reference value table 34, a small reference value is associated with a facility type having a long estimated stay time Ts. Therefore, by comparing the reference value table 34 with the reference value specified based on the facility type, the navigation device 1 can more accurately evaluate the position change from the current position to the optimum position. .

  Next, the charging position guidance screen 80 displayed on the liquid crystal display 15 in S9 and S10 will be described with reference to FIGS. FIG. 8 shows an example of the charging position guidance screen 80 in S9, and FIG. 9 is an explanatory diagram showing an example of the charging position guidance screen 80 in S10.

  As shown in FIGS. 8 and 9, the charging position guide screen 80 includes a first charging efficiency display unit 81, a second charging efficiency display unit 82, a charging efficiency graph 83, and a current location display unit 84 that displays a facility type. have. The first charging efficiency display unit 81 displays the charging efficiency of the battery 55 at the current position based on the charging efficiency Ca specified in S3. The second charging efficiency display unit 82 displays the charging efficiency of the battery 55 at the optimal position based on the optimal charging efficiency Cb specified in S5.

  The charging efficiency graph 83 is formed above the first charging efficiency display unit 81 and the second charging efficiency display unit 82, and displays the charging efficiency Ca and the optimum charging efficiency Cb in a graph. Therefore, the user visually recognizes the bar graph related to the charging efficiency Ca and the bar graph related to the optimal charging efficiency Cb, and from the viewpoint of charging efficiency, the user continues charging at the current position and moves to the optimal position for charging. Both can be compared, and it can be determined whether or not it is necessary to move to the optimum position.

  Specifically, the charging efficiency graph 83 is a graph showing the charging efficiency Ca in a portion located above the first charging efficiency display unit 81. Accordingly, the user can grasp the charging efficiency Ca displayed on the first charging efficiency display unit 81 and the graph indicating the charging efficiency Ca in the charging efficiency graph 83 in association with each other. In addition, a graph showing the optimum charging efficiency Cb is shown in a portion located above the second charging efficiency display portion 82. Accordingly, the user can grasp the optimum charging efficiency Cb displayed on the second charging efficiency display unit 82 and the graph indicating the optimum charging efficiency Cb in the charging efficiency graph 83 in association with each other.

  Further, the charging position guidance screen 80 (see FIG. 8) displayed in S9 is displayed in a different background color from the charging position guidance screen 80 (see FIG. 9) displayed in S10. Therefore, the user can grasp the presence or absence of the merit of performing charging by changing the position to the optimum position based on the difference in the background color of the charging position guide screen 80. Thereby, the user can more easily determine whether or not it is necessary to move from the current position to the optimum position.

  As described above, in the navigation device 1 according to the first embodiment, the vehicle charging support method by the navigation device 1 and the computer program executed by the navigation device 1 (hereinafter referred to as the navigation device 1 or the like), The charging efficiency (charging efficiency Ca) of the battery 55 is specified (S3).

  And in the said navigation apparatus 1 grade | etc., The optimal position whose charging efficiency is better than a present position is specified (S4), and the charging efficiency (optimum charging efficiency Cb) in the said optimal position is specified (S5). Further, in the navigation device 1 or the like, the reference value specified based on the facility type where the host vehicle 60 is located is compared with the difference between the optimum charging efficiency Cb and the charging efficiency Ca (S8), and based on the comparison result, The charging position guide screen 80 is displayed on the liquid crystal display 15 (S9, S10).

  Therefore, the navigation device 1 or the like considers the type of facility where the host vehicle 60 is currently located (particularly the staying time), and compares the charging at the current position with the charging at the optimum position (charging position guidance). Screen 80) may be presented. As a result, the user can thoroughly examine the necessity of movement from the current position to the optimum position and make an accurate determination.

  In the navigation device 1 or the like, a large reference value is associated with a facility type having a short estimated stay time Ts in the reference value table 34 (see FIG. 6). Therefore, by comparing the reference value table 34 with the reference value specified based on the facility type, the navigation device 1 can more accurately evaluate the position change from the current position to the optimum position. .

  The first charging efficiency display unit 81, the second charging efficiency display unit 82, and the charging efficiency graph 83 indicate to the user the charging efficiency at the current position (charging efficiency Ca) and the charging efficiency at the optimal position (optimum charging efficiency Cb). Can be presented. Therefore, the user can compare the charging at the current position with the charging accompanied by the movement to the optimum position, and determine whether or not the movement to the optimum position is necessary.

  Further, the navigation device 1 or the like compares the charging of the battery at the current position with the charging of the battery at the optimum position accompanying the position change from the current position by changing the background color of the charging position guide screen 80. The result is notified (see FIGS. 8 and 9). Therefore, according to the navigation device 1 or the like, the user can more easily select one of the battery charging at the current position and the battery charging at the optimum position with a position change from the current position. .

(Second Embodiment)
Next, an embodiment (second embodiment) different from the first embodiment will be described. Since the navigation apparatus 1 according to the second embodiment has the same basic configuration as the navigation apparatus 1 according to the first embodiment, the description thereof is omitted. In the second embodiment, since the content of the charging position guidance processing program is different from that of the first embodiment, the charging position guidance processing program will be described in detail with reference to the drawings.

  Also in the second embodiment, the charging position guidance processing program includes the host vehicle 60 in a parking lot of a certain facility in which the parking frame 70 is drawn on the road surface and the power supply unit 65 is embedded in the ground in the parking frame 70. Is executed by the CPU 41 at the time when parking in the desired parking frame 70 is completed by reverse parking (see FIG. 3). FIG. 10 is a flowchart of the charging position guidance processing program according to the second embodiment.

  In the charging position guidance processing program according to the second embodiment, first, the CPU 41 performs the processes of S21 to S23. Since the processing contents of S21 to S23 are the same as the processing contents of S1 to S3 in the first embodiment described above, description thereof will be omitted. After acquiring the charging efficiency Ca in S23, the CPU 41 proceeds to S24.

  In S <b> 24, the CPU 41 acquires from the battery 55 the current remaining amount of the battery 55 (hereinafter, the remaining battery amount Ep). After acquiring the remaining battery level Ep, the CPU 41 proceeds to S25.

  In S25, the CPU 41 acquires the target charge amount Et. The target charge amount Et is a target value related to charging of the battery 55 by non-contact power supply by the power supply unit 65, and means a fully charged state (ie, 100%) in the first embodiment. The target charge amount Et may not be fully charged, and the user may set an arbitrary value as the target charge amount Et. After acquiring the target charge amount Et, the CPU 41 proceeds to S26.

  The processing content of S26 to S28 is the same processing as S4 to S6 in the first embodiment. Therefore, detailed description thereof is omitted. The CPU 41 specifies the optimum position (S26), specifies the optimum charging efficiency Cb (S27), and specifies the facility type (S28), and then proceeds to S29.

  In S29, the CPU 41 acquires the estimated stay time Ts in the facility where the host vehicle 60 is located based on the facility type specified in S28 and the reference value table 34 (see FIG. 6). After obtaining the estimated stay time Ts, the CPU 41 proceeds to S30.

  In S30, the CPU 41 calculates the first charge amount Ra based on the charging efficiency Ca, the remaining battery level Ep, and the estimated stay time Ts. The first charge amount Ra is the first battery remaining amount Ea at the time when the estimated stay time Ts has elapsed, and the battery 55 is charged at the current position from the state of the battery remaining amount Ep until the estimated stay time Ts has elapsed. The remaining amount of the battery 55 is shown. After calculating the first charge amount Ra, the CPU 41 proceeds to S31.

  In S31, the CPU 41 determines whether or not the first charge amount Ra is equal to or less than the target charge amount Et. When 1st charge amount Ra is below target charge amount Et (S31: YES), CPU41 transfers a process to S32. On the other hand, when the first charge amount Ra is larger than the target charge amount Et (S31: NO), the CPU 41 determines that the battery 55 can be sufficiently charged to the user desired state by charging the battery 55 at the current position. Then, the charging position guidance processing program is terminated.

  After shifting to S32, the CPU 41 calculates the power consumption amount Ec. The power consumption amount Ec means the amount of power of the battery 55 consumed by driving a motor (not shown) or the like when moving from the current position to the optimum position. Specifically, the CPU 41 specifies the relative positional relationship between the current position and the optimum position based on the current position information, the power receiving unit position information 32, and the power feeding unit position information. Based on the relative positional relationship between the current position and the optimum position, and the vehicle turning radius of the own vehicle 60, the CPU 41 calculates a trajectory (including switching) when the own vehicle 60 reaches the optimum position. Ask. Thereafter, the CPU 41 calculates a power consumption amount Ec based on the length of the locus and a predetermined target vehicle speed. After calculating the power consumption amount Ec, the CPU 41 proceeds to S33.

  In S33, the CPU 41 calculates the second charge amount Rb based on the remaining battery amount Ep, the power consumption amount Ec, the optimum charge efficiency Cb, and the estimated stay time Ts. Specifically, the CPU 41 first subtracts the power consumption amount Ec from the current battery remaining amount Ep to obtain a battery remaining amount at the time of completion of movement from the current position to the optimal position (hereinafter referred to as remaining amount Ef at the time of movement). calculate. Then, the CPU 41 calculates the second charge amount Rb based on the optimum charge efficiency Cb, the movement completion remaining amount Ef, and the estimated stay time Ts. That is, the second charge amount Rb is the second battery remaining amount Eb at the time when the estimated stay time Ts has elapsed under the condition considering the movement from the current position to the optimum position, and from the state of the remaining amount Ef when the movement is completed. The remaining amount of the battery 55 when the battery 55 is charged at the optimum position until the estimated stay time Ts elapses is shown. After calculating the second battery remaining amount Eb, the CPU 41 proceeds to S34.

  In S34, the CPU 41 determines whether or not a value obtained by subtracting the first charge amount Ra from the second charge amount Rb is larger than a threshold value. The threshold is a value arbitrarily set by the user and is stored in a storage device such as the flash memory 44. When the value obtained by subtracting the first charge amount Ra from the second charge amount Rb is larger than the threshold (S34: YES), the CPU 41 proceeds to S35. On the other hand, when the value obtained by subtracting the first charge amount Ra from the second charge amount Rb is equal to or less than the threshold value (S34: NO), the CPU 41 proceeds to S36.

  In S35, the CPU 41 outputs that there is a merit of charging the battery 55 by changing the position from the current position to the optimum position. Specifically, the CPU 41 displays a departure time remaining amount comparison screen 90 on the liquid crystal display 15 to notify that there is a merit of charging the battery 55 by changing the position from the current position to the optimum position. After the departure remaining amount comparison screen 90 (see FIG. 12) is displayed on the liquid crystal display 15, the CPU 41 ends the charging position guidance processing program.

  In S36, the CPU 41 outputs that there is no merit of charging the battery 55 by changing the position from the current position to the optimum position. That is, the CPU 41 outputs that there is a merit in charging the battery 55 at the current position. Specifically, the CPU 41 displays a departure time remaining amount comparison screen 90 on the liquid crystal display 15 to notify that there is no merit of charging the battery 55 by changing the position from the current position to the optimum position. After the departure remaining amount comparison screen 90 (see FIG. 13) is displayed on the liquid crystal display 15, the CPU 41 ends the charging position guidance processing program.

  Here, when charging at the current position is continued and when moving to the optimal position and charging is performed at the optimal position, a comparison is made in terms of the relationship between the remaining amount of the battery 55 and the elapsed time from the current time. The contents of determination in S34 in the second embodiment will be described in detail with reference to FIG.

  As described above, when the charging is continued at the current position, the first battery remaining amount Ea is continuously charged according to the charging efficiency at the current position (that is, the charging efficiency Ca). , The battery remaining amount Ep) increases linearly with the charging efficiency Ca as an inclination (see FIG. 12). On the other hand, when charging the battery 55 at the optimum position, the second battery remaining amount Eb is consumed from the remaining battery amount Ep by the amount of power consumption Ec by driving the motor or the like when moving from the current position to the optimum position. The remaining amount Ef when the movement is completed. Accordingly, since the second battery remaining amount Eb is continuously charged from the remaining amount Ef at the time of movement according to the charging efficiency at the optimum position (that is, the optimum charging efficiency Cb), the optimal charging is performed from the remaining amount Ef at the time of movement. It increases linearly with the efficiency Cb as a slope (see FIG. 12).

  Here, as shown in FIG. 12, when the estimated stay time Ts is short, the second charge amount Rb may be smaller than the first charge amount Ra as a result of consumption of the power consumption amount Ec by moving to the optimum position. . That is, as a result of the movement to the optimum position, the amount of charge at the time when the staying time has elapsed is reduced, so it can be said that there is no merit of moving the battery to the optimum position and charging the battery 55.

  On the other hand, when the estimated stay time Ts is long, even if the power consumption amount Ec is consumed by moving to the optimal position, the power consumption amount Ec is sufficiently recovered by improving the charging efficiency by moving to the optimal position. 2 charge amount Rb may exceed 1st charge amount Ra. In this case, as a result of the movement to the optimal position, the amount of charge at the time when the staying time has elapsed is improved.

  In addition, the presence or absence of the merit of moving to the optimal position is influenced by the user's subjectivity. In this regard, in S34, the difference between the second charge amount Rb and the first charge amount Ra is compared with a threshold set by the user to determine the presence or absence of the merit. Therefore, the determination result in S34 reflects the subjective factors of the user.

  Next, the departure remaining amount comparison screen 90 displayed on the liquid crystal display 15 in S35 and S36 will be described with reference to FIGS. FIG. 12 shows an example of the departure remaining amount comparison screen 90 in S35, and FIG. 13 is an explanatory diagram showing an example of the departure remaining amount comparison screen 90 in S36.

  As shown in FIGS. 12 and 13, the departure remaining amount comparison screen 90 includes a first charging efficiency display unit 91, a second charging efficiency display unit 92, a departure remaining amount graph 93, and a current location display unit 94. The estimated stay time display unit 95 is provided. The first charging efficiency display unit 91 displays the charging efficiency of the battery 55 at the current position based on the charging efficiency Ca specified in S23. The second charging efficiency display unit 92 displays the charging efficiency of the battery 55 at the optimal position based on the optimal charging efficiency Cb specified in S27.

  The departure remaining amount graph 93 is formed above the first charging efficiency display unit 91 and the second charging efficiency display unit 92, and displays the first charging amount Ra and the second charging amount Rb in a graph. Therefore, the user visually recognizes the bar graph related to the first charge amount Ra and the bar graph related to the second charge amount Rb, so that the battery 55 at the time when the estimated stay time Ts has elapsed (that is, at the time of departure from the current facility). From the viewpoint of the remaining amount, it is possible to compare both the case where charging is continued at the current position and the case where charging is performed by moving to the optimum position, and it is possible to determine whether or not movement to the optimum position is necessary.

  Specifically, the departure time remaining amount graph 93 is a graph showing the first charge amount Ra in a portion located above the first charge efficiency display unit 91. Thereby, the user can grasp | ascertain by matching the charging efficiency Ca displayed on the 1st charging efficiency display part 91, and the graph which shows 1st charge amount Ra in the residual amount graph 93 at the time of departure. In addition, a graph showing the second charge amount Rb is shown in a portion located above the second charge efficiency display portion 92. Accordingly, the user can grasp the optimum charging efficiency Cb displayed on the second charging efficiency display unit 82 and the graph indicating the second charging amount Rb in the departure remaining amount graph 93 in association with each other.

  Further, in the bar graph indicating the second charge amount Rb, the amount of power consumed by changing the position to the optimum position (power consumption amount Ec) is displayed as “resumed consumption”. Therefore, the user can grasp the ratio of the power consumption amount Ec to the second charge amount Rb, and more specifically, can determine whether or not it is necessary to move from the current position to the optimum position.

  The current location display unit 94 displays the facility type specified in S28. The estimated stay time display unit 95 displays the value of the estimated stay time Ts specified in S29. Therefore, the user can clearly grasp at which point the remaining battery level is compared specifically, and can accurately determine whether or not it is necessary to move from the current position to the optimum position.

  Furthermore, the departure remaining amount comparison screen 90 (see FIG. 12) displayed in S35 is displayed in a different background color from the departure remaining amount comparison screen 90 (see FIG. 13) displayed in S36. Therefore, the user can grasp the merit of performing charging by changing the position to the optimum position based on the difference in the background color of the departure time remaining amount comparison screen 90. Thereby, the user can more easily determine whether or not it is necessary to move from the current position to the optimum position.

  As described above, the navigation device 1 or the like according to the second embodiment has the type of facility (particularly the staying time) where the host vehicle 60 is currently located and the amount of power consumed by the movement from the current position to the optimum position. In consideration of the above, it is possible to present a material (departure remaining amount comparison screen 90) for comparing the charging at the current position with the charging at the optimum position. As a result, the user can thoroughly examine the necessity of movement from the current position to the optimum position and make an accurate determination.

  In the navigation device 1 or the like, the estimated stay time Ts is associated with the facility type in the reference value table 34 (see FIG. 6). Therefore, by comparing the reference value table 34 with the reference value specified based on the facility type, the navigation device 1 can more accurately evaluate the position change from the current position to the optimum position.

  The first charging efficiency display unit 91 and the second charging efficiency display unit 92 can present the charging efficiency at the current position (charging efficiency Ca) and the charging efficiency at the optimal position (optimum charging efficiency Cb) to the user. Furthermore, the remaining battery level at the time of departure 93 can present to the user the remaining battery level (ie, the first charge amount Ra and the second charge amount Rb) when the estimated stay time has elapsed. Therefore, the user can compare the charging at the current position with the charging accompanied by the movement to the optimum position, and determine whether or not the movement to the optimum position is necessary.

  Further, the navigation device 1 or the like changes the background color of the departure-time remaining amount comparison screen 90, thereby charging the battery at the current position and charging the battery at the optimum position with the position change from the current position. The comparison result is notified (see FIGS. 12 and 13). Therefore, according to the navigation device 1 or the like, the user can more easily select one of the battery charging at the current position and the battery charging at the optimum position with a position change from the current position. .

  Although the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. For example, in the second embodiment, in S31, by comparing the first charge amount Ra and the target charge amount Et, it is possible to charge to the target charge amount Et within the estimated stay time Ts by charging at the current position. However, the present invention is not limited to this mode. For example, based on the charging efficiency Ca and the battery remaining amount Ep, a period necessary for charging up to the target charging amount Et at the current position is calculated, and the calculated period is compared with the estimated staying time Ts. Judgment may be made.

  In the above-described embodiment, when the position of the power supply unit 65 is detected, the power supply unit position information is acquired through communication with the power supply unit 65. However, the present invention is not limited to this mode. Various methods can be adopted as long as the position of the power supply unit 65 can be specified. For example, a configuration may be adopted in which a camera is connected to the navigation device 1 and the position of the power supply unit 65 relative to the host vehicle 60 is specified by performing image recognition processing on an image captured by the power supply unit. good. In this case, it is preferable that the power supply unit 65 has a color and a shape that can be distinguished from the ground of the parking lot. In addition, when the power supply unit 65 is embedded in the ground or the like of the parking lot, it is desirable that a mark indicating the position of the power supply unit 65 is drawn on the ground of the parking lot.

  In the above embodiment, the charging efficiency of the battery 55 is specified based on the charging efficiency map 33 shown in FIG. 4 and the offset amount. However, the present invention is not limited to this mode. A magnetic field sensor may be connected to the navigation device 1 and the charging efficiency may be specified based on the magnetic field strength, or a table indicating the relationship between the offset amount and the charging efficiency may be used. Moreover, the aspect which added the concept of height to the charging efficiency map 33 may be sufficient, and also when a charging efficiency changes according to the angle of the electric power feeding unit 65 and the receiving unit 50, it will also consider an angle. You may comprise.

  Furthermore, in the said embodiment, although the charging efficiency of the battery 55 by the electric power feeding unit 65 was used as an example of a charge state, it is not limited to this aspect. That is, various indicators can be used as long as the indicators can determine whether the battery 55 is charged at the current position and whether the battery 55 is charged at the optimum position.

  In the second embodiment, a trajectory for moving from the current position to the optimum position is calculated, and the power consumption Ec is obtained based on the trajectory and a predetermined target vehicle speed. It is not limited to. For example, the power consumption Ec may be calculated using a table based on the size of the current position with respect to the optimal position by acquiring the front / back / left / right deviation.

  Further, the trajectory of the host vehicle 60, the vehicle speed, and the like when the vehicle is actually moved from the current position to the optimal position are learned in the flash memory 44 and the like, and the learned contents are used when calculating the power consumption Ec. May be. As a result, the calculation result of the power consumption amount Ec reflects the habit or the like related to the user's driving operation, so the second charge amount Rb that is more realistic can be calculated, and the optimal position It is possible to improve the determination accuracy regarding whether or not to move to.

1 Navigation device 13 Navigation ECU
41 CPU
42 RAM
43 ROM

Claims (12)

Current position acquisition means for acquiring a current position of the host vehicle having a power receiving unit used for charging a battery;
A power supply unit detecting means for detecting a power supply unit that performs non-contact power supply to the power receiving unit;
Optimal position specifying means for specifying the optimal position where the state of charge of the battery by the power supply unit is best;
Storage means for storing the battery charge at the current position and the reference value for evaluating the battery charge at the optimum position in association with each facility;
Reference value selection means for selecting a reference value corresponding to the facility where the host vehicle is located based on the current position of the host vehicle;
Using the reference value selected by the reference value selection means, the charging position evaluation means for performing the evaluation on the charging of the battery at the current position and the charging of the battery at the optimum position and notifying the evaluation result; A charging support device for a vehicle, comprising: The vehicle charging support device according to claim 1,
The charging position evaluation means includes
By using the reference value selected by the reference value selection means, by comparing the charge amount of the battery per predetermined time at the current position and the charge amount of the battery per predetermined time at the optimal position, A charging support device for a vehicle, characterized in that the battery charging at the current position and the charging at the optimum position are evaluated. The charging support device for a vehicle according to claim 1 or 2,
The vehicle charging support apparatus, wherein the reference value is determined based on a staying time at the facility. The vehicle charging support device according to any one of claims 1 to 3,
The charging position evaluation means includes
By comparing the comparison value between the charge amount per unit time at the optimum position and the charge amount per unit time at the current position with the reference value selected by the reference value selection means, the A charging support device for a vehicle, characterized in that evaluation relating to charging of the battery and charging of the battery at the optimum position is performed. The vehicle charging support device according to claim 4,
The charging support device for a vehicle, wherein the reference value is a smaller value as the staying time at the facility is longer. A vehicle charging support apparatus according to any one of claims 1 to 3,
The reference value indicates a staying time in the facility,
The charging position evaluation means includes
Based on the condition for charging the battery at the current position, the first battery remaining amount at the time when the stay time based on the reference value has elapsed is calculated, and the condition for charging the battery at the optimal position is And calculating the second battery remaining amount at the time when the stay time based on the reference value has elapsed,
Charging support for a vehicle, wherein the battery charge support at the current position and the charge of the battery at the optimum position are evaluated by comparing the first battery remaining amount and the second battery remaining amount apparatus. The vehicle charging support device according to claim 6,
Battery remaining amount acquisition means for acquiring the remaining amount of the battery;
Power consumption estimating means for estimating the amount of power consumed when moving from the current position to the optimal position,
The charging position evaluation means includes
The vehicle charging support device, wherein the second battery remaining amount is calculated based on a state in which the power consumption is subtracted from a current battery remaining amount. The vehicle charging support device according to claim 7,
The charging position evaluation means includes
When the first battery remaining amount is equal to or greater than a predetermined target charge amount, the charging support device for a vehicle is arranged to stop the evaluation of charging of the battery at the current position and charging of the battery at the optimal position. . A vehicle charging support device according to any one of claims 1 to 8,
The charging state specifying means includes
Based on the position of the power receiving unit and the position of the power supply unit, the state of charge of the battery by the power supply unit at the current position is specified,
The optimum position specifying means includes
The vehicle charging support device, wherein the optimum position is specified based on the position of the power receiving unit and the position of the power feeding unit. A vehicle charging support device according to any one of claims 1 to 9,
The charging support device for a vehicle, wherein the charging state of the battery is charging efficiency of the battery by the power feeding unit. A current position acquisition step of acquiring a current position of the host vehicle having a power receiving unit used for charging a battery;
A power feeding unit detection step for detecting a power feeding unit that performs non-contact power feeding to the power receiving unit;
An optimum position identifying step for identifying an optimum position where the state of charge of the battery by the power feeding unit is best;
In order to evaluate the charging of the battery at the current position and the charging of the battery at the optimum position, from the reference value stored in association with each facility in the storage means, based on the current position of the host vehicle, A reference value selection step for selecting a reference value corresponding to the facility where the vehicle is located;
Using the reference value selected in the reference value selecting step, charging the battery at the current position, evaluating the battery charging at the optimal position, and charging position evaluation step for notifying the evaluation result; A charging support method for a vehicle, comprising: On the computer,
A current position acquisition function for acquiring a current position of the host vehicle having a power receiving unit used for charging a battery;
A power supply unit detection function for detecting a power supply unit that performs non-contact power supply to the power reception unit;
An optimum position specifying function for specifying an optimum position where the state of charge of the battery by the power supply unit is best;
In order to evaluate the charging of the battery at the current position and the charging of the battery at the optimum position, from the reference value stored in association with each facility in the storage means, based on the current position of the host vehicle, A reference value selection function for selecting a reference value corresponding to the facility where the vehicle is located;
Using the reference value selected by the reference value selection function, charging the battery at the current position, evaluating the battery charging at the optimal position, and a charging position evaluation function for notifying the evaluation result, A computer program for executing

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