JP5408002B2 - Map display device, map display method, and map display program - Google Patents

Description

  The present invention relates to a map display device, a map display method, and a map display program for displaying a charging facility on a map.

  In recent years, electric vehicles (EV vehicles) that use a battery charged from outside the vehicle, such as a plug-in hybrid vehicle and a battery vehicle, as a drive power source for the motor have attracted attention as environmentally friendly vehicles. On the other hand, when using EV cars on a social infrastructure built with automobiles that use an internal combustion engine as a power generation source, users are required to pay particular attention to the necessity of charging batteries. Therefore, in a navigation device adopted for an EV car, as described in Patent Document 1, for example, the charging speed of the charging facility is set so that a user of the EV car can easily search for a charging facility suitable for the intention. Proposals have been made to display in association with the location of the facility.

JP 2009-30993 A

  Here, if there are few charging facilities displayed on the map, the charging speed is displayed on the map, so that the user can surely understand the charging speed of the charging facility. . However, as the number of charging facilities continues to increase with the spread of EV cars, the number of charging facilities displayed on the map is by no means small, and the number of charging facilities displayed on the map is large. If it becomes, it will become difficult to grasp not only the charging speed for each charging facility, but also the position of the charging facility.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a map display device and a map display capable of facilitating the search for a charging facility whose required time for charging is relatively short. It is to provide a method and a map display program.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
The invention according to claim 1 is a map display device that displays a battery charging facility on a map including a traveling range of the vehicle, and has a relatively high charging speed within the traveling range where the remaining amount of the battery can travel. Search means for searching for a high-speed charging facility and a low-speed charging facility having a relatively low charging speed, estimating means for estimating the remaining amount of battery when traveling to the high-speed charging facility, and charging speed of the high-speed charging facility Non-display for calculating the non-display range according to the charging time at the high-speed charging facility estimated based on the charge rate acquisition means to be acquired, the remaining amount at the high-speed charging facility and the charging speed of the high-speed charging facility Range calculation means, and display control means for displaying a low-speed charging facility not included in the non-display range among the low-speed charging facilities around the high-speed charging facility on a display unit together with the high-speed charging facility. The gist of the door.

Although the charging speed at the high-speed charging facility and the charging speed at the low-speed charging facility vary slightly depending on the remaining amount of the battery and the battery temperature, the charging speed at the high-speed charging facility does not become lower than the charging speed at the low-speed charging facility. Therefore, as the amount of charge required at the charging facility increases, that is, as the remaining amount at the charging facility decreases, the difference in charging time between these two types of charging facilities increases. If such a difference in charging time is small, even if the low-speed charging facility is used for charging, it is difficult for a large difference in required time to reach the destination. However, if the low-speed charging facility is used when the difference in charging time is large, the time required to reach the destination becomes very long as compared with the case where the high-speed charging facility is used.

  In this regard, according to the first aspect of the present invention, the non-display range is calculated according to the charging time at the high-speed charging facility. When the charging time at the high-speed charging facility is long, that is, in a traveling range where the remaining amount of the battery is low when the high-speed charging facility is reached, the charging time at the low-speed charging facility around the high-speed charging facility is further increased. . And the difference of the charging time mentioned above becomes large. If the non-display range corresponding to the charging time in the high-speed charging facility is calculated, it is possible to calculate the non-display range corresponding to the above-described difference in charging time. Therefore, even when the number of charging facilities in the traveling range is large, it is possible to hide the low-speed charging facilities in the vicinity of the high-speed charging facility in a range corresponding to the charging time in the high-speed charging facility. Become. Therefore, it is possible to facilitate the search for a charging facility that requires a relatively short time for charging.

  In the invention according to claim 2, the estimation means further estimates the remaining amount of the battery when traveling to the low speed charging facility, and the charging speed acquisition means further acquires the charging speed of the low speed charging facility. The non-display range calculation means includes a charging time at the low-speed charging facility and a charging time at the high-speed charging facility that are estimated based on the remaining amount at the low-speed charging facility and the charging speed of the low-speed charging facility. The gist is to calculate the non-display range based on the difference between the two.

  In many cases, the charging facility included in the travel range is constituted by three different charging facilities such as a quick charging facility, a double speed charging facility, and a normal charging facility. In a configuration where the non-display range of the low-speed charging facility is determined based on the remaining amount of the battery at the high-speed charging facility, if the fast charging facility is a fast charging facility, the non-display range of the double-speed charging facility and the normal charging facility are the same. It may be a thing.

  In this regard, according to the second aspect of the invention, the non-display range is calculated based on the difference between the charging time at the high-speed charging facility and the charging time at the low-speed charging facility. Therefore, if a low-speed charging facility is constituted by a double-speed charging facility and a normal charging facility, the non-display range of the double-speed charging facility and the normal charging facility is determined to be a range corresponding to each charging speed. Become. Therefore, it is possible to realize a search for a charging facility that takes a relatively short time to reach the destination with higher accuracy.

  According to a third aspect of the present invention, there is provided a map display method for displaying a charging facility of a battery on a map, and a high-speed charging facility and a charging speed having a relatively high charging speed within a traveling range in which the battery can be driven with the remaining amount of battery Searching for a relatively low-speed charging facility, estimating a remaining battery level when traveling to the fast-charging facility, obtaining a charging speed of the fast-charging facility, and fast-charging Calculating a non-display range according to a charging time at the fast charging facility estimated based on a remaining amount at the facility and a charging speed of the fast charging facility; and the slow charging around the fast charging facility And a step of displaying a low-speed charging facility not included in the non-display range among the facilities on the display unit together with the high-speed charging facility.

  According to invention of Claim 3, the non-display range according to the charging time in a high-speed charging facility is calculated. Therefore, even when the number of charging facilities in the traveling range is large, only charging facilities having a relatively short charging time among the charging facilities are displayed. Therefore, it is possible to facilitate the search for a charging facility that requires a relatively short time for charging.

According to a fourth aspect of the present invention, there is provided a map display program used for a map display device having a control means for controlling display of a battery charging facility on a map, and the control means can be driven with the remaining amount of battery. Search means for searching for a high-speed charging facility with a relatively high charging speed and a low-speed charging facility with a relatively low charging speed within the traveling range, and an estimation for estimating the remaining battery level when traveling to the high-speed charging facility Charging speed at the high-speed charging facility estimated based on means, charging speed acquisition means for acquiring a charging speed of the high-speed charging facility, and a remaining amount at the high-speed charging facility and a charging speed of the high-speed charging facility A non-display range calculating means for calculating a non-display range according to the low-speed charge facility not included in the non-display range among the low-speed charge facilities around the fast charge facility And summarized in that to work together as a display control means for displaying on the display unit.

  According to invention of Claim 4, the non-display range according to the charge time in a high-speed charge facility is calculated. Therefore, even when the number of charging facilities in the traveling range is large, only charging facilities having a relatively short charging time among the charging facilities are displayed. Therefore, it is possible to facilitate the search for a charging facility that requires a relatively short time for charging.

The block diagram which shows the structure of the navigation apparatus in one Embodiment which actualized the map display apparatus concerning this invention. The figure which shows typically the non-display range when an object charge facility is a quick charge facility. The figure which shows typically the non-display range when an object charging facility is a double speed charging facility. The flowchart which shows the procedure concerning a map display process. The flowchart which shows the procedure concerning a display / non-display setting process. The flowchart which shows the procedure concerning a display / non-display setting process. The figure which shows an example of the map which a navigation apparatus displays. The figure which shows an example of the map which a navigation apparatus displays.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment in which a map display device, a map display method, and a map display program according to the present invention are embodied will be described with reference to FIGS. FIG. 1 is a block diagram showing a configuration of a navigation device as a map display device in the present embodiment.

  As shown in FIG. 1, the navigation device 10 includes a control device 11 that controls the entire navigation device 10 as well as constituting control means, search means, estimation means, and charging speed acquisition means. In addition, the navigation device includes a position detection unit 12, a battery control unit 13, a display 14 constituting a display unit, and a speaker 15. The control device 11 includes a control unit 21, a vehicle-side I / F 22, a geographic information storage unit 23, an image processing processor 24, and an audio processing processor 25 that constitute a non-display range calculation unit and a display control unit. The control unit 21 is used as a work area for the CPU 31 that performs various calculations based on input data, a RAM 32 that stores a route when a route is searched, and various control uses. It consists of a ROM 33 in which programs are stored.

  The position detector 12 includes a GPS receiver 34, a vehicle speed sensor 35, and a gyro sensor 36. The control device 11 detects the absolute position such as latitude and longitude by radio navigation based on the received signal received by the GPS receiver 34. Further, the control device 11 calculates a relative position from the reference position using autonomous navigation based on the detection signals detected by the vehicle speed sensor 35 and the gyro sensor 36. And the control apparatus 11 specifies the present location of the own vehicle combining the absolute position and relative position which are output from the position detection part 12. FIG.

  The battery control unit 13 controls charging / discharging of the traveling battery charged by connecting a charging connector to a power supply source such as an outlet outside the vehicle. The battery control unit 13 calculates SOC (State of Charge) indicating the remaining amount of the battery based on a method of estimating from the open circuit voltage value of the battery or a current integrating method of integrating the charging current value of the battery. The control device 11 estimates the remaining battery level at the current location, the remaining battery level on the guidance route, the charging time required for charging, and the like using the remaining battery level output from the battery control unit 13. .

  The image processor 24 generates various image data to be displayed on the display screen 14 a of the display 14 based on a control signal from the control unit 21, and outputs the generated image data to the display 14. Then, the image processor 24 displays a map in which the own vehicle index indicating the current position of the own vehicle is superimposed on the map on which the guide route from the departure point to the destination is exaggerated on the display screen 14a. Further, the image processor 24 displays an indicator of the charging facility at the position of the charging facility on the map in such a manner that each of the plurality of charging facilities is selectively displayed based on the relative superiority. In addition, the image processor 24 displays traffic information, operation guidance, operation menus, key guidance, guidance information along the guidance route, and the like on the display screen 14 a of the display 14.

  The display 14 has a plurality of operation switches such as various keys and buttons for receiving an operation from the user. When each operation switch is pressed, various instruction commands are output from the display 14 to the control device 11. For example, after the destination setting screen for setting the destination and the starting point is displayed on the display 14, the destination and the starting point are output from the display 14 to the control device 11. The control device 11 searches for a guidance route leading to Then, a surrounding map including the guidance route is displayed on the display 14 by the control device 11.

The voice processor 25 outputs various guidance voices from the speaker 15 by reading voice data from a voice data storage unit included in the voice processor 25.
The geographic information storage unit 23 is an external storage medium such as a hard disk or an optical disk. The geographic information storage unit 23 stores the above-described map image, traffic information, guide route, data for displaying these, and various data used for calculating the guide route. Specifically, the geographic information storage unit 23 includes node data Dnd relating to nodes, link data Dlk relating to links, search data Dsc for searching for a route to a destination, search data Drt for searching for a position, and a map. Is stored, map data Dmp for displaying, consumption estimation data Dcv indicating the relationship between the travel path and the discharge amount, and facility data Dcf regarding the charging facility. Various types of data stored in the geographic information storage unit 23 are updated by receiving information distributed from an information distribution center, for example.

  The node is set at a branching point or an end point of a road at an intersection or a T-shaped road. The node data is configured in such a way that a node ID for identifying such a node is associated with a node position, a node attribute, an identifier of each link connected to the node, and the like.

  The link data includes the link ID for identifying the link, the node ID of the connection node, the number of lanes, the road width, the road gradient, the road attributes such as the downhill road and the uphill road, the link length, the national highway and the national highway The road type, traffic regulation information such as one-way traffic, and road charges are associated with each other.

The search data Dsc displays the cost data used for calculating the search cost, which is the sum of the node cost, the link cost, etc., the travel time necessary for passing the link, and the guidance route on the map of the display 14. Route display data and the like. For example, when the target node is an intersection, the value of the node cost is set depending on a travel route such as straight travel, right turn, and left turn when passing through the intersection and the presence or absence of a signal. The link cost is set based on the road attribute, road type, road width, number of lanes, link length, etc. included in the link data.

  Then, when the destination and the departure place are output from the display 14 to the control device 11, the range from the departure place within the range according to the conditions such as the mileage priority, the general road priority, the toll road priority, the travel time priority, and the charge priority The guide route is searched by the control device 11 so that the search cost to reach the destination is minimized. Then, a peripheral map including the guidance route is displayed on the display 14, and route guidance according to the peripheral map is started by the control device 11.

  The map data Dmp is data for displaying a map on the display 14 and is hierarchized according to the information amount of the road network. The map data Dmp is data divided into a plurality of meshes having different area sizes for each layer, and road shape data or roads for drawing a curved portion of a road with respect to a mesh ID for identifying the mesh. The background data for drawing an area other than is associated with each other.

  The consumption amount estimation data Dcv is data in which the length of the route and the gradient of the route are associated with the consumption amount of the battery required for traveling the route. Then, based on the length of the guide route and the gradient of the guide route and the consumption amount estimation data Dcv, the control device 11 calculates a travel range AC that is a range in which the vehicle can travel with the remaining amount at the departure place.

  The facility data Dcf includes a facility ID for identifying a charging facility, a location of the facility, a type of facility, and the like. Charging facilities are included in the types of facilities constituting the facility data Dcf. Data related to the charging facility is further added with a charging speed, which is a charging amount per unit time, a cost required for charging, and the like. As the charging speed of the charging facility, three types are defined: a rapid charging speed of the quick charging facility 40H, a double speed charging speed of the double speed charging facility 40M, and a normal charging speed of the normal charging facility 40L. These three types of charging speed increase in the order of normal charging speed, double speed charging speed, and rapid charging speed. For example, if the current storage capacity is 30% and the specified storage capacity is 80%, according to the quick charging facility 40H, the battery reaches the specified storage capacity by charging for 30 minutes, while the double speed charging facility 40M Charging for 120 minutes and charging for 360 minutes are required at the normal charging facility 40L. Note that the above-described charging speed is a value that changes with time depending on the state of the battery such as the remaining battery level [Wh] and the temperature of the battery. It is preferable to correct the constant in the above-described battery state.

  The charging speed at the quick charging facility 40H and the charging speed at the normal charging facility 40L vary slightly depending on the remaining battery level and the battery temperature, but the charging speed at the quick charging facility 40H is higher than the charging speed at the normal charging facility 40L. There is no. Therefore, as the amount of charge required at the charging facility increases, that is, as the remaining amount when reaching the charging facility decreases, the difference in charging time among the three types of charging facilities increases. If such a difference in charging time is small, even if the normal charging facility 40L is used for charging, it is difficult for a large difference in required time to reach the destination. However, if the normal charging facility 40L is used when the above-described difference in charging time is large, the time required to reach the destination is much longer than when the quick charging facility 40H is used. End up.

  Therefore, in the navigation device 10 according to the present embodiment, the display / non-display setting is performed in the map display processing when guiding the guide route so as to hide the charging facility having a low priority around the charging facility having a high priority. The control device 11 executes the process.

  Next, an example of map display processing executed by the navigation device 10 will be described with reference to FIGS. FIG. 2 is a diagram schematically illustrating an example of a non-display range defined around the rapid charging facility 40H, and FIG. 3 schematically illustrates an example of a non-display range defined around the double speed charging facility 40M. FIG.

  The map display process in the navigation device 10 can be realized by hardware composed of various circuits. On the other hand, the map display program read from the ROM 33 or the geographic information storage unit 23 is also realized by software. Is possible. Hereinafter, an example in which the map display process in the navigation device 10 is realized by software will be described. First, an example of the non-display range defined around the quick charge facility 40H and an example of the non-display range defined around the double speed charge facility 40M will be described.

  As shown in FIG. 2, a first non-display range S1 having a non-display radius RB centered on the quick charge facility 40H is defined around the quick charge facility 40H. The first non-display range S1 is a region where the double speed charging facility 40M (illustrated by a broken line) included in the region is not displayed on the map. Around the first non-display range S1, a second non-display range S2 having a non-display radius RC centered on the quick charging facility 40H is defined. The second non-display range S2 is a region where the normal charging facility 40L (illustrated by a broken line) included in the region is not displayed on the map.

  As shown in FIG. 3, a third non-display range S3 having a non-display radius RD is defined around the double speed charging facility 40M around the double speed charging facility 40M. The third non-display range S3 is a region where the normal charging facility 40L (illustrated by a broken line) included in the region is not displayed on the map.

  The non-display radius RB, the non-display radius RC, and the non-display radius RD that define the sizes of the first non-display range S1, the second non-display range S2, and the third non-display range S3 described above are expressed by the following formula ( It is derived based on 1), (2), and (3). The non-display radii RB, RC, and RD are parameters in units of time, and the non-display radii RB, RC, and RD are multiplied by the traveling speed, thereby the distance from the quick charging facility 40H, that is, the map. This is a parameter indicating the radius of the non-display range above.

Non-display radius RB =
{[(Driving time to double speed charging facility) + (Charging time at double speed charging facility)] × k1}
− {[(Traveling time to quick charging facility) + (charging time at quick charging facility)]} Equation (1)
Non-display radius RC =
{[(Travel time to normal charging facility) + (charging time at normal charging facility)] × k2}
-{[(Traveling time to quick charging facility) + (charging time at quick charging facility)]} (2)
Non-display radius RD =
{[(Traveling time to normal charging facility) + (charging time at normal charging facility)] × k3}
− {[(Traveling time to double speed charging facility) + (charging time at double speed charging facility)]} Equation (3)
The peripheral correction coefficients k1, k2, and k3 used in the equations (1), (2), and (3) are coefficients that increase the non-display range as the values increase. For example, in a region where the density of charging facilities is relatively high, the size of the non-display range can be increased by increasing the peripheral correction coefficients k1, k2, and k3. It becomes easy to be searched. Conversely, if the density of charging facilities is relatively low, this peripheral correction factor k
Since the size of the non-display range can be reduced by reducing 1, k2, and k3, it is possible to suppress the charging facility from being unnecessarily hidden. The peripheral correction coefficients k1, k2, and k3 are coefficients set in a range of 0.1 to 0.5, for example, and may be different from each other for each type of the non-display range. There may be. When different values are used, it is advantageous in that the difference in charging speed between charging facilities can be reflected in the size of the non-display range.

Various parameters used in the equations (1), (2), and (3) are calculated as follows.
[Driving time]
The travel time to the quick charging facility 40H is calculated by multiplying the travel time stored in the geographic information storage unit 23 and the distance to the quick charging facility 40H. Further, the traveling time to the double speed charging facility 40M and the normal charging facility 40L may be calculated by derivation similar to the traveling time to the quick charging facility 40H described above, or is equal to the traveling time to the quick charging facility 40H. It can also be handled. In the present embodiment, on the assumption that the double speed charging facility 40M and the normal charging facility 40L that are the targets of non-display setting are in the vicinity of the quick charging facility, the travel time to the quick charging facility 40H and other charging It is assumed that the traveling time to the facility is equal, and the difference between the traveling time to the quick charging facility 40H and the traveling time to another charging facility is compensated by the peripheral correction coefficients k1, k2, and k3.

[charging time]
The remaining amount of the battery when it reaches the charging facility is calculated from the difference between the current remaining amount of the battery and the consumption amount of the battery consumed until reaching the charging facility. Further, the amount of charge required at the charging facility is calculated from the difference between the remaining amount of the battery and the designated amount of charging when the charging facility is reached. Then, the charging time required at the charging facility is calculated by dividing the charging amount required at the charging facility by the charging speed of the charging facility. Note that the amount of battery consumed before reaching the charging facility may be calculated based on the search route to the charging facility and the consumption estimation data Dcv, or simply the distance to the charging facility. It may be calculated based on the electricity cost. In the present embodiment, the charging time is calculated based on the distance to the charging facility, that is, the distance to the quick charging facility 40H and the power consumption (travel distance per unit energy).

  Here, as shown in the above formula (1), the size of the first non-display range S1 increases as the difference between the charging time at the quick charging facility 40H and the charging time at the double speed charging facility 40M increases. As shown in the above formula (2), as the difference between the charging time at the quick charging facility 40H and the charging time at the normal charging facility 40L increases, the size of the second non-display range S2 increases. Further, as shown in the above equation (3), the size of the third non-display range S3 increases as the difference between the charging time at the double speed charging facility 40M and the charging time at the normal charging facility 40L increases. That is, the difference between the charging time at a charging facility that has a high priority in terms of charging speed and the charging time at a charging facility that also has a low priority in terms of charging speed, the lower the charging, The non-display range for facilities is increased.

  On the other hand, the difference in charging time between charging facilities becomes larger as (a) the difference in charging speed increases and (b) the charging amount at the charging facility increases. In this regard, although the charging speed at the quick charging facility 40H and the charging speed at the normal charging facility 40L vary slightly depending on the remaining battery level and the battery temperature, the charging speed at the quick charging facility 40H is higher than the charging speed at the normal charging facility 40L. It does not decrease, and can be handled as substantially constant as compared with the difference in charge amount at the charging facility. Therefore, the difference in charging time between charging facilities, that is, the size of each non-display range S1, S2, S3 is larger as the charging amount at the charging facility is larger, in other words, as the remaining amount at the charging facility is smaller. Become.

  In the non-display ranges S1, S2, and S3 having such a configuration, it is difficult to display a charging facility with a low charging speed around a charging facility with a high charging speed. Moreover, even if the charging facilities have the same superiority in terms of charging speed, the charging facilities are more difficult to be displayed on the map as the distance between the current location and the charging facility is increased. Therefore, compared to a configuration in which a charging facility with a high charging speed is simply displayed, charging facilities with a relatively short charging time are displayed and charged even if the charging facilities have the same charging speed. Charging facilities with a relatively long time are hidden. Therefore, it becomes easy to search for a charging facility that takes a relatively short time to reach the destination.

  Next, a procedure for map display processing using the non-display ranges S1, S2, and S3 will be described with reference to FIGS. FIG. 4 is a flowchart showing a procedure for map display processing. FIG. 5 is a flowchart showing a procedure related to the display / non-display setting process, and shows a case where the target charging facility is the rapid charging facility 40H. FIG. 6 is a flowchart showing a procedure for the display / non-display setting process, and shows a case where the target charging facility is the normal charging facility 40M.

  The control device 11 determines to start the map display process when the ignition switch is turned on. Then, as shown in FIG. 5, after the travel range AC that can travel with the remaining amount of the departure place is calculated, all charging facilities included in the travel range AC are based on the facility data Dcf and the travel range AC. Search is performed (step S10).

  When all charging facilities that can be reached by the host vehicle are searched, the types of all charging facilities searched are acquired based on the charging facility ID and facility data Dcf related to the charging facility (step S20). Then, after the display / non-display setting process for all the searched charging facilities is executed (step S30), a process for displaying the charging facilities set for display on the map is executed (step S40). .

  When the display / non-display setting process is started, a determination is made as to whether or not the target charging facility is the rapid charging facility 40H for the target charging facility to be processed (step S31). If the target charging facility is not the quick charging facility 40H (NO in step S31), the target charging facility is set as a temporary display target, and display / non-display setting is set for all target charging facilities. It is determined whether or not the processing has been performed (step S37), and it is determined whether or not the target charging facility is the quick charging facility 40H until the display / non-display setting processing is performed for all the target charging facilities. Repeated.

  On the other hand, if it is determined in the previous determination as to whether or not the target charging facility is the rapid charging facility 40H, the travel time to the target charging facility is calculated when it is determined that the target charging facility is the rapid charging facility 40H. (Step S32). Next, based on the consumption of the battery consumed up to the target charging facility and the current remaining battery level, the remaining battery level when the target charging facility is reached is calculated (step S33). Subsequently, the charging time at the target charging facility is calculated based on the remaining amount of the battery at the target charging facility and the charging speed associated with the type of the target charging facility (step S34). Then, using the above formulas (1) and (2), the first non-display range S1 and the second non-display range S2 for the target charging facility are calculated (step S35).

When the first non-display range S1 and the second non-display range S2 are calculated in this manner, the double speed charging facility 40M and the normal charging facility 40L included in the first non-display range S1 and the second non-display range S2 In addition to the search, the searched double speed charging facility 40M and the normal charging facility 40L are fixed to non-display targets (step S36). Then, it is determined whether display / non-display setting processing has been performed for all target charging facilities (step S37), and target charging is performed until display / non-display setting processing is performed for all target charging facilities. The determination as to whether the facility is the quick charging facility 40H is repeated.

  When the display / non-display setting process for the rapid charging facility 40H is executed as described above, the display / non-display setting process for the double speed charging facility 40M is subsequently executed for the provisional display target. . That is, as shown in FIG. 6, it is determined whether or not the target charging facility is the double speed charging facility 40M for the target charging facility that is the target of processing (step S41). If the target charging facility is not the double speed charging facility 40M (NO in step S41), the target charging facility is set as a temporary display target, and display / non-display setting is set for all target charging facilities. It is determined whether or not the processing has been performed (step S47), and it is determined whether or not the target charging facility is the double speed charging facility 40M until the display / non-display setting processing is performed for all target charging facilities. Repeated.

  On the other hand, when the target charging facility is determined to be the double speed charging facility 40M in the previous determination as to whether the target charging facility is the double speed charging facility 40M, the traveling time to the target charging facility is calculated. (Step S42). Next, the remaining amount of battery in the target charging facility is calculated based on the consumed amount of battery consumed up to the target charging facility and the current remaining amount of battery (step S43). Subsequently, the charging time at the target charging facility is calculated based on the remaining battery level at the target charging facility and the charging speed associated with the type of the target charging facility (step S44). Then, the third non-display range S3 for the target charging facility is calculated using the above equation (3) (step S45). When the third non-display range S3 is calculated in this way, the normal charging facility 40L included in the third non-display range S3 is searched, and the searched normal charging facility 40L is fixed as a non-display target. (Step S46). Then, it is determined whether or not the display / non-display setting process for the double speed charging facility 40M has been executed for all the display objects that have been provisional (step S47). Then, the determination as to whether the target charging facility is the double speed charging facility 40M is repeated until the display / non-display setting process is performed for all the target charging facilities.

  7 and 8 are diagrams showing examples of maps generated by the map display process described above. 7 and 8 are maps each showing a state in which the host vehicle CI travels along the guide route R at the upper left of the screen. In particular, FIG. 7 shows a map scene before the host vehicle CI is charged at the double speed charging facility 40M on the guide route R, and FIG. 8 shows a map after the host vehicle CI is charged at the double speed charging facility 40M. Show.

  As shown in FIG. 7, one double speed charging facility 40Ma and one normal charging facility 40La are displayed along the guide route R within the travel range AC of the host vehicle CI. On the other hand, two quick charge facilities 40H, two double speed charge facilities 40M, and nine normal charge facilities 40L are displayed around the guide route R outside the travel range AC (upper left of the screen).

  From this state, when the host vehicle CI is charged at the double speed charging facility 40Ma and travels to the upper left of the screen along the guide route R, as a result of the travel range AC moving with the host vehicle CI, as shown in FIG. The number and location of charging facilities displayed on the map changes.

  More specifically, as shown in FIG. 8, two normal charging facilities 40Lb are newly displayed in the vicinity of the past route on which the host vehicle CI has traveled, and the above-described normal charging facility 40La is not displayed. . Further, among the plurality of charging facilities displayed on the upper left of the screen, the five normal charging facilities 40L displayed in the vicinity of the two quick charging facilities 40H are not displayed.

As described above, according to the map display device, the map display method, and the map display program according to the above embodiment, the effects listed below can be obtained.
(1) The smaller the remaining amount at the quick charging facility 40H, the wider the first non-display range S1 and the second non-display range S2 around the quick charge facility 40H. Therefore, even when the number of double speed charging facilities 40M and normal charging facilities 40L in the traveling range AC is large, only charging facilities having a relatively short charging time among the charging facilities are displayed. Therefore, it becomes easy to search for a charging facility that takes a relatively short time to reach the destination.

  (2) As the remaining amount at the double speed charging facility 40M decreases, the third non-display range S3 becomes wider around the double speed charging facility 40M. For this reason, even when the charging facility included in the traveling range AC is composed of only the double-speed charging facility 40M and the normal charging facility 40L, the double-speed charging facility 40M is reliably displayed. Only the charging facilities having a relatively short charging time among the normal charging facilities 40L are displayed. Therefore, it is also possible to execute non-display of the charging facility according to the type of charging facility included in the travel range AC.

  (3) The size of the first non-display range S1 changes according to the difference between the charging time at the quick charging facility 40H and the charging time at the double speed charging facility 40M. Further, the size of the second non-display range S2 changes according to the difference between the charging time at the quick charging facility 40H and the charging time at the normal charging facility 40L. That is, the non-display range is set according to the difference in charging speed between charging facilities. Therefore, it is possible to search for a charging facility that takes a relatively short time to reach the destination with higher accuracy based on the charging speed of the charging facility.

(4) Since all the charging facilities in the travel range AC are the targets of the display / non-display process, the above-described effects can be obtained over the entire travel range AC.
It should be noted that each of the above embodiments can be implemented with appropriate modifications as follows.

  In the above embodiment, all charging facilities within the travel range AC are targets for display / non-display setting processing. For example, when a guide route is set by changing this, the charging facility that is within the travel range AC and along the guide route is the target of the display / non-display setting process. May be. The point is that the non-display range of the low-speed charging facility around the high-speed charging facility having a relatively high charging speed may be increased as the remaining amount of the battery in the high-speed charging facility becomes smaller.

  In the above embodiment, the sizes of the non-display ranges S1, S2, and S3 are set based on the formulas (1), (2), and (3). By changing this, the terms of travel time in the equations (1), (2), (3), for example, “travel time to the double speed charging facility” and “travel time to the quick charge facility” in the formula (1) are changed. The configuration may be ignored. Further, in the expressions (1), (2), and (3), the term of the charging time for the charging facility having a relatively low charging speed, for example, “charging time at the double speed charging facility” in the expression (1) is ignored. It may be configured to. Even with such a configuration, it is possible to obtain the effects according to the above (1) and (2).

  In the above embodiment, the sizes of the non-display ranges S1, S2, and S3 are set based on the formulas (1), (2), and (3). A configuration in which the peripheral correction coefficients k1, k2, and k3 in Equations (1), (2), and (3) are omitted may be changed. Even if it is such a structure, it is possible to acquire the effect according to said (1)-(4).

  In the above embodiment, an example in which a plurality of charging facilities included in the traveling range AC have different charging speeds has been described. However, if the charging facilities included in the traveling range AC have the same charging speed, The configuration may be such that the non-display range is not set.

  DESCRIPTION OF SYMBOLS 10 ... Navigation apparatus, 11 ... Control apparatus, 40H ... Fast charge facility, 40M ... Double speed charge facility, 40L ... Normal charge facility, S1 ... 1st non-display range, S2 ... 2nd non-display range, S3 ... 3rd non-display range.

Claims (4)

A map display device for displaying a battery charging facility on a map,
Search means for searching for a high-speed charging facility with a relatively high charging speed and a low-speed charging facility with a relatively low charging speed within a driving range where the battery can run with the remaining amount of battery,
Estimating means for estimating the remaining amount of battery when traveling to the fast charging facility;
Charging speed acquisition means for acquiring a charging speed of the fast charging facility;
A non-display range calculation means for calculating a non-display range according to a charge time at the fast charging facility estimated based on a remaining amount at the fast charging facility and a charging speed of the fast charging facility;
Display control means for displaying, on the display unit together with the high-speed charging facility, a low-speed charging facility that is not included in the non-display range among the low-speed charging facilities around the high-speed charging facility. . The estimation means includes
Further estimate the remaining amount of battery when traveling to the low-speed charging facility,
The charging speed acquisition means includes
Further acquiring the charging speed of the slow charging facility;
The non-display range calculation means includes
The non-display range based on the difference between the charging time at the low-speed charging facility and the charging time at the high-speed charging facility estimated based on the remaining amount at the low-speed charging facility and the charging speed of the low-speed charging facility The map display device according to claim 1, wherein: A map display method for displaying a battery charging facility on a map,
Searching for a high-speed charging facility with a relatively high charging speed and a low-speed charging facility with a relatively low charging speed within a driving range in which the battery can run with a remaining amount of battery;
Estimating the remaining amount of battery when traveling to the fast charging facility;
Obtaining a charging speed of the fast charging facility;
Calculating a non-display range according to a charging time at the fast charging facility estimated based on a remaining amount at the fast charging facility and a charging speed of the fast charging facility;
And displaying the low-speed charging facility that is not included in the non-display range among the low-speed charging facilities around the high-speed charging facility on the display unit together with the high-speed charging facility. A map display program for use in a map display device having a control means for controlling display of a battery charging facility on a map ,
The control means;
Search means for searching for a high-speed charging facility with a relatively high charging speed and a low-speed charging facility with a relatively low charging speed within a driving range where the battery can run with the remaining amount of battery,
Estimating means for estimating the remaining amount of battery when traveling to the fast charging facility;
Charging speed acquisition means for acquiring a charging speed of the fast charging facility;
A non-display range calculation means for calculating a non-display range according to a charge time at the fast charging facility estimated based on a remaining amount at the fast charging facility and a charging speed of the fast charging facility;
A map display program for causing a low-speed charging facility not included in the non-display range among the low-speed charging facilities around the high-speed charging facility to function as display control means for displaying on the display unit together with the high-speed charging facility. .

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