JP2012118599A - Navigation device with destination setting support function for electric vehicles - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide "a navigation device with a destination setting support function for electric vehicles" capable of determining whether an electric vehicle, that can travel by electric power of batteries mounted on the vehicle, will be able to travel from its destination to a charging stand after arriving at the destination when the destination is set, and in the case when the device determines the vehicle cannot reach to any stand from the destination, capable of warning that the destination is not appropriate.SOLUTION: A navigation device with a destination setting support function for electric vehicles calculates a guidance route from a current position to a destination, and in the case when it calculates the guidance route which needs charging at a charging stand on the way to the destination, the navigation device detects the nearest stand from the destination, and also calculates total distance L2+L3, where L2 is the distance from the last charging stand at which an electric vehicle charges lastly before the destination or the current position to the destination and L3 is the distance from the destination to the nearest stand from the destination. If the total distance is larger than L1 that is the travelable distance of the electric vehicle at full charge (L1<L2+L3), the navigation device outputs the alarm of an inappropriate destination.

Description

  The present invention relates to a navigation device used for an electric vehicle (EV) that travels using a motor as a drive source. After reaching the destination at a destination to be set, the remaining power is used to travel to an electric vehicle charging station (EVST). The present invention relates to a navigation device with a destination setting support function for an electric vehicle that can warn that it cannot be performed.

  Due to environmental problems in recent years, problems of oil removal, etc., electric vehicles (EVs) that run using a motor as a drive source are becoming popular. However, such an electric vehicle has very few EV stands (EVST) for charging a battery of an electric vehicle as compared with a gasoline station or a gasoline station for a diesel vehicle which has been used conventionally. It is a major factor that hinders the spread of

  Therefore, in such an electric vehicle, charging stations for electric vehicles are initially installed in a relatively narrow range with as high a density as possible. In particular, electric vehicles are spread in that range, and the range is gradually expanded. Expansion of bases nationwide is being considered. In addition, since an electric vehicle can travel about 100 km with a single charge, it can be used for relatively long-distance driving. For this reason, charging facilities are installed at gas stations on major roads, as well as large commercial facilities, aiming to spread electric vehicles nationwide.

  On the other hand, navigation devices that have been widely used in the past calculate a guide route to a destination through a transit point arbitrarily set by the user, and travel safely and reliably to the destination according to the guide route. Guidance is provided so that you can do it.

  That is, in the conventionally used navigation apparatus, a map / information recording medium such as a DVD-ROM, a hard disk, a memory card or the like on which map data for drawing a map and facility information data for searching for a facility are recorded. And a playback device that reads the data of the map / information recording medium, a monitor that displays a map, etc., and a vehicle position detection device that detects the current position of the vehicle and the direction of travel by a GPS receiver or the like. Map data including the current position is read from the map / information recording medium, and a map image around the vehicle position is drawn on the screen of the display device based on the map data, and the vehicle position mark is superimposed and displayed. The map image is scrolled and displayed according to the movement, or the map image is fixed on the screen and the vehicle position mark is moved. Whether running on a standing somewhere so that at a glance.

  The map data recorded in the map / information recording apparatus as described above is divided into longitude and latitude widths of appropriate sizes according to various scale levels, and roads are expressed in longitude and latitude. It is recorded as a coordinate set of nodes. A road is composed of a combination of two or more nodes, and map data displays a road layer consisting of a road list, a node table, an intersection configuration node list, etc., and roads, buildings, facilities, parks, rivers, etc. on the map screen. Map data such as a background layer, and information data for displaying characters, map symbols, etc., such as administrative division names such as municipalities, road names, intersection names, and facility names.

  In addition, this navigation device has a route guidance function that allows the user to easily travel to a desired destination without making a mistake on the road. According to this route guidance function, destinations and waypoints are set by various means using addresses, telephone numbers, map scrolling, nearby landmarks, etc., and routes connecting these points from the departure point to the destination Appropriate routes are calculated and presented in consideration of various conditions. Also, the route selected by the user is stored as a guide route, and while driving, the guide route is drawn on the map image with a different color from other routes and displayed on the screen. When approaching an intersection where the course of course should be changed within a certain distance, the intersection is enlarged and displayed on the screen by drawing an arrow indicating the direction in which the course should be changed, or a right or left turn is guided by voice. In this way, the user can be guided to the destination.

  As described above, the navigation device has the basic operation of accurately detecting the current position, displaying a map corresponding to the current position on the monitor and displaying the current position in an overlapping manner. It is necessary to easily know the position of a certain point as a whole, the road around the current position, and the surroundings . When traveling on a guidance route in this navigation device, guidance is provided at a specific guidance point such as a right-left turn intersection according to a preset guidance route so that the vehicle can travel safely without being lost from the current position to the destination. To do so, divide the screen into left and right, display an enlarged map of the point where guidance is provided, such as an enlarged view of the intersection on one screen, and display the surrounding normal map on the other screen, etc. The screen is also displayed.

  When traveling using such a navigation device with a destination set as necessary and a transit point as required, a gasoline engine or a diesel engine that has been conventionally used, or a hybrid vehicle that runs with an engine and a motor, etc. (Abbreviated as gasoline cars, etc.), there are gas stations at various places on the road where there are relatively many vehicles running, and when it seems that gasoline will run out, refueling at such gas stations will drive to the destination with almost no problems. In addition, the subsequent driving can be performed without any problem.

  On the other hand, in the electric vehicle as described above, a travel plan must be made in consideration of charging of a battery that supplies power to a motor that is a drive source of the electric vehicle. In other words, in an electric vehicle, when the power of the battery that is a power supply source for the motor of the drive source is exhausted, the vehicle cannot travel at all. Therefore, when it is estimated that the current battery remaining power cannot reach the destination, It is necessary to consider the driving route considering the charging station to the ground.

  Therefore, for example, as shown in FIG. 8A as a conventional example, when an electric vehicle (EV) that can travel, for example, 120 km when the battery is fully charged travels toward a destination, a conventional gasoline vehicle or the like is shown as a solid line in the figure. Even when a guidance route is set as shown by route a, when the required travel distance of the route a is 160 km, this electric vehicle that can normally travel 120 km at full charge travels to the destination without charging. That is dangerous.

  Therefore, in a navigation device mounted on an electric vehicle, for example, an electric vehicle charging station (EVST) that is as close as possible to the route a as the shortest route is searched, set there as a waypoint, and from the charging station to the destination Calculate the guidance route. After that, the range that can be traveled when fully charged at the charging station is calculated, and if there is no destination in that range, the next charging station is searched by the same process, and the same process is repeated to reach the destination. When possible, it is presented as a guide route to the destination.

  Accordingly, in the example of FIG. 8 (a), a charging station that is as close as possible to the normal guidance route route a and that is as close as possible to the distance in the range where the vehicle can be fully charged at the start of traveling is searched. The example in which the charging station A is searched is shown. Thereby, the route b from the present location to the charging station A is set. When it is assumed that the charging station A is fully charged and the distance from the destination to the destination is calculated to be 70 km, this electric vehicle is in a sufficiently travelable range. The path c is determined.

  Conventionally, a guidance route as shown by a broken line in FIG. 8A is set by the above processing, and when the user confirms the guidance route, the normal function of the navigation device subsequently passes through the charging station A from the current location. Thus, the vehicle can be safely and surely guided to the destination, including right and left turn intersections, etc. to the destination.

  In the navigation system of an electric vehicle, if the guidance route that can travel to the destination cannot be searched, such as the distance between the charging station and the next charging station exceeds the distance that can be traveled at full charge, Japanese Patent Application Laid-Open No. H10-228688 discloses a technique for issuing a warning that the information cannot be reached.

  In addition, in the navigation system of an electric vehicle, if the current battery remaining power cannot reach the destination or the charging stand, the current battery remaining power indicates that the destination cannot be reached and the minimum charging time is presented. This technique is disclosed in Patent Document 2.

JP-A-10-170293 JP 2003-294463 A

  As described above, in the electric vehicle, when calculating the guidance route to the destination, it is essential to set the guidance route in consideration of charging at the charging station. However, in the conventional technology, if the destination can be reached, the guidance route is handled as appropriate, and traveling after the destination has been reached has not been considered.

  That is, for example, as shown in FIG. 8 (a), even if a guidance route to the destination considering the charging station is made and the vehicle starts traveling, for example, as shown in FIG. 8 (b), from the destination to the current location. When trying to return, or when trying to travel to the next place, the remaining electric energy of this electric vehicle when reaching the destination is already traveling 70 km even when fully charged at charging station A, The remaining amount of power can only travel about 50 km.

  On the other hand, when the destination is not equipped with a charging facility, and the charging facility closest to the destination is the charging station B located 60 km away from the destination, It is impossible to travel to a place, and it is necessary to request that the vehicle for charging be dispatched in the same manner as in the case of a gas shortage in a conventional gasoline vehicle or the like.

  In this regard, in the technique disclosed in Patent Document 1 as the conventional technique, even if the destination can be reached, the battery power is consumed on the way back, or the nearest There may be cases where you cannot reach the charging station. Further, even the technique disclosed in Patent Document 2 is based on the premise that the charging stand exists at a position where all the power of the battery is not consumed. It is the same.

  Therefore, the present invention, when setting a destination in an electric vehicle that runs on battery power mounted on a vehicle, considers whether or not the next run can be performed after arriving at the destination. The main purpose is to provide a navigation device with a destination setting support function for an electric vehicle that can determine whether the setting of the vehicle is appropriate and can issue a warning when it is found that the next run cannot be performed. .

  In order to solve the above problems, a navigation device with a destination setting support function for an electric vehicle according to the present invention includes a destination setting means for setting a destination, and a guide route calculating means for calculating a guide route from the current location to the destination. And a destination closest charging station detecting means for detecting an electric vehicle charging station closest to the destination, and when the route to the destination can be calculated by the guidance route calculating means, the current position or the destination is reached. When the electric vehicle is fully charged, the distance from the final electric vehicle charging station that is charged last to the electric vehicle charging station detected by the nearest electric vehicle charging station detection means via the destination A destination closest electric vehicle charging stand travelability determination means for determining whether or not the travelable distance of the vehicle is short, and the destination closest electric vehicle travelable When the discrimination means determines that the vehicle cannot reach the nearest electric vehicle charging station, the vehicle has a warning output means that indicates that the vehicle cannot travel after reaching the destination. Features.

  Another navigation device with a destination setting support function for an electric vehicle according to the present invention is the navigation device with a destination setting support function for an electric vehicle, when the guide route to the destination can be calculated by the guide route calculation means. And further comprising an electric vehicle charging station selection means for selecting an electric vehicle charging station for traveling from the destination to the closest electric vehicle charging station to the destination, wherein the electric vehicle charging station selection means is the final electric vehicle charging station. When an electric vehicle charging station that can be fully charged and can travel to the nearest electric vehicle charging station via the destination cannot be selected, the non-running warning output means outputs a warning output after reaching the destination. Features.

  Another navigation device with a destination setting support function for an electric vehicle according to the present invention is the navigation device with a destination setting support function for an electric vehicle, wherein the electric vehicle charging station selecting means includes a destination closest electric vehicle charging station. Is located between the current location or the final electric vehicle charging station, the destination closest electric vehicle charging station is selected as the final electric vehicle charging station.

  Another navigation device with a destination setting support function for an electric vehicle according to the present invention is the navigation device with a destination setting support function for an electric vehicle, wherein the electric vehicle charging station selection means includes a destination closest electric vehicle charging station. When the vehicle is present or far from the final electric vehicle charging station, the electric vehicle charging station existing between the current location or the final electric vehicle charging station and the destination is selected as the final electric vehicle charging station. And

  Another navigation apparatus with a destination setting support function for an electric vehicle according to the present invention is an object for detecting that an electric vehicle charging station is provided at the destination in the navigation apparatus with a destination setting support function for an electric vehicle. When the route to the destination can be calculated by the guidance route calculation unit, the electric vehicle charging stand detection unit is provided with the electric vehicle charging stand at the destination. When it is detected that the vehicle has traveled, it is characterized in that the subsequent processing for outputting the travel impossibility warning after the arrival at the destination is not performed.

  Since the present invention is configured as described above, when setting a destination in an electric vehicle that runs on battery power mounted on the vehicle, whether or not the next run can be performed after arrival at the destination is determined. Considering this, it is determined whether the destination setting is appropriate, and when it is found that the next run cannot be performed, a warning can be issued, and the setting of an appropriate destination can be supported.

It is a functional block diagram of the Example of this invention. It is an operation | movement flowchart of the Example. It is a figure which shows the operation | movement aspect at the time of the destination setting of the Example. It is a figure which shows the other operation | movement aspect at the time of the destination setting of the Example. It is a figure which shows the further another operation | movement aspect at the time of the destination setting of the Example. It is a figure which shows the further another operation | movement aspect at the time of the destination setting of the Example. It is a figure which shows the further another operation | movement aspect at the time of the destination setting of the Example. It is a figure explaining a prior art and its problem.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a functional block diagram of an embodiment of the present invention, and shows a functional block diagram in which the present invention can be implemented in various modes. In addition, in the same figure, the function part which performs each function can be said to be a means which performs each function.

  In the embodiment shown in FIG. 1, when setting a destination of a guidance route for a conventionally used navigation apparatus, it is determined whether or not traveling can be continued after arrival at the destination. In this example, various functions are provided so that a warning can be issued when it is determined that traveling cannot be continued.

  Therefore, in the navigation apparatus shown in FIG. 1, as in the conventional navigation apparatus, software for comprehensively controlling various functional units is recorded in the ROM, and the CPU performs an operation using the RAM as appropriate and performs a desired operation. A system control unit 10 that operates is provided, and each function unit connected to the system control unit 10 can perform a predetermined function as a navigation device.

  A vehicle position detection unit 13 is connected to the system control unit 10 and position data of the GPS receiver 11 is input. Further, if necessary, the vehicle from the travel distance / orientation detection unit 12 using a vehicle speed sensor or an angle sensor. The current position of the vehicle is accurately detected by inputting the movement data. Further, the VICS information input unit 14 can receive FM radio waves, beacons, etc., capture traffic information, and particularly input traffic jam information.

  In the instruction signal input unit 17, various instruction signals can be input by the remote controller 15 or by recognizing a voice as a user instruction signal, and further by a touch panel operation of the monitor 20. The data input / output unit 19 fetches necessary map data, facility information, etc. from a map / information data recording medium 18 such as a DVD-ROM or a hard disk or a memory card, and the data recording medium is like a hard disk or a memory card. When data can be easily written, data can be recorded on the map / information data recording medium 18 so that data such as a memory card or USB memory can be read and used.

  The image output unit 21 outputs various images that the navigation device guides the user to the monitor 20 and outputs a warning when setting a destination as described later. The voice output unit 23 outputs important guidance on the guidance route from the speaker 22 as a voice output of the navigation device, and outputs a warning at the time of destination setting as will be described later if necessary.

  In the guide route calculation unit 31, the destination and waypoint setting unit 32 sets the destination and waypoint by various means using an address, a telephone number, scrolling a map, nearby landmarks, and the like. In the electric vehicle charging station (EVST) utilization guidance route calculation unit 33, in the electric vehicle to which the present invention is applied, the destination / intermediate point setting unit 32 is determined from the current position as the vehicle position detected by the vehicle position detection unit 13. The guide route to the destination through the waypoint set in is calculated.

  In that case, the guidance route is calculated in consideration of the charging station that is indispensable for an electric vehicle, and when it can travel from the current location to the destination with the remaining amount of power of the current battery, like a conventional gasoline vehicle, etc. If it is possible to calculate the guidance route but it is not possible to travel to the destination with the current remaining power of the battery, it is as close as possible to the normal guidance route and travels with the current remaining power. By searching for charging stations that are close to the limits of the range within the possible range, and then further calculating the guidance route to the destination via each waypoint, The guidance route will be calculated.

  Therefore, in this electric vehicle charging station (EVST) utilization guidance route calculation unit 33, the calculation of the guidance route as described above is performed, so detection of the charging station is an important process. Therefore, in the illustrated example, the electric vehicle charging station is used. An (EVST) detection unit 34 is provided, and a charging station existing at a place having the above-described conditions is detected from each point.

  In the illustrated example, the destination EVST 35 detects whether or not an electric vehicle charging station is also provided at the destination set by the destination / route setting unit 32. Further, the nearest destination EVST 36 detects the electric vehicle charging station closest to the destination. In addition, the guidance route proximity EVST 37 detects a charging station that is as close to the guidance route as possible when it is necessary to use the charging stand before reaching the destination.

  The EVST selection unit 38 selects a charging station that can travel as much as possible to the nearest destination EVST 36 as will be described later, particularly when the guidance route calculation unit 33 calculates the guidance route using the electric vehicle charging station (EVST). In the selection, an appropriate charging station is selected in cooperation with the electric vehicle charging station (EVST) utilization guide route calculation unit 33.

  In the destination reachability determination unit 39, when the guide route calculation unit 31 calculates the guide route to the destination in consideration of the electric vehicle charging station as described above, for example, the destination must be charged halfway. When it is found that there is no charging station in a range where the vehicle can travel, the route that can be driven at the destination and waypoint set by the destination / route point setting unit 32 is not found, and the guidance route cannot be calculated. Outputs that the destination cannot be reached.

  In the example of FIG. 1, the destination unreachable cause detection output unit 40 is provided, and when the destination reachability determination unit 39 outputs that the destination cannot be reached, the calculation process of the guide route calculation unit 31 is performed. With this data, for example, a guidance indicating that the vehicle has been able to travel to a predetermined waypoint after departure but cannot reach the next route point, or has reached each route point but cannot reach the destination, is output.

  In the nearest destination EVST / destination distance calculation unit 41, when the destination reachability determination unit 39 determines that the guidance route that can reach the destination has been calculated, the electric vehicle charging station (EVST) detection unit 34 When the destination side EVST 35 is not detected, the distance (L3) between the nearest destination EVST and the destination is calculated using the detection result of the nearest destination EVST 36.

  When the destination-to-destination nearest EVST distance calculation unit 44 can arrive without using a charging station on the way from the current location to the destination, the distance from the current location to the nearest EVST via the destination In addition, when using the charging station on the way, the distance from the destination to the nearest EVST via the destination is calculated.

  In the nearest destination EVST travel possibility determination unit 42, on the assumption that the current location or the final charging station is fully charged, the distance that can be traveled by this electric vehicle from each point and the nearest destination EVST via the destination The distance calculated by the distance calculation unit 44 is compared, and it is determined whether or not it is not possible to reach the nearest destination EVST via the destination even if the vehicle is running at full charge at the current location or the final EVST.

  When it is determined by the closest EVST travel availability determination unit 42 that the travel is impossible, that is, when it is determined that the vehicle can reach the destination but cannot travel to the charging station closest to the destination, The signal is output to the guide route calculation unit 31. In the guidance route calculation unit 31, the EVST selection unit 38 particularly selects the final charging station as will be described later, and the above operation is repeated to select any charging station from the destination to the nearest EVST. When it is determined that the vehicle cannot reach the vehicle, the signal is output to the travel impossible warning output unit 43 after reaching the destination. The travel impossible warning output unit 43 after reaching the destination displays a warning on the monitor 20 from the image output unit 21, and a warning sound that the destination setting is not appropriate from the speaker 22 via the voice output unit 23. Output guidance.

  In the destination / route change guide unit 46, the cause when the destination cannot be reached due to the destination unreachable cause detection output unit 40 being unable to find an appropriate charging station in the route, etc. And instructing the user that the route or destination needs to be changed and the cause thereof. In addition, when only the warning indicating that the vehicle cannot travel after reaching the destination is output in the travel impossibility warning output unit 43 after reaching the destination, the detailed guidance output is output by the destination route change guide unit 46. You may make it do. By outputting the guidance, the user can examine the cause in detail, and can be used as a reference for changing the waypoint such as an appropriate vacation facility and changing the destination such as the location of the hotel.

  The guidance route storage unit 47 stores the guidance route when an appropriate guidance route is obtained by the guidance route calculation unit 31 and confirmed by the user, as in a normal navigation device. The guide route guide unit 48 draws the guide route on the map image with a different color from that of other roads and displays it on the screen, or the vehicle approaches an intersection where the route on the guide route should be changed within a certain distance. The user can be guided to the destination by enlarging the intersection, drawing an arrow indicating the direction in which the course should be changed, and displaying it on the screen, or by guiding the turn left or right by voice. I can do it.

  The navigation device of the present invention composed of the functional blocks as described above can be implemented by, for example, sequentially operating according to the operation flow shown in FIG. That is, in the example of the electric vehicle guidance route setting warning output process shown in FIG. 2, the process starts from the first setting of the waypoint / destination (step S1). Here, it is not always necessary to set the waypoint.

  Thereafter, a guidance route from each waypoint to the destination is calculated using the electric vehicle charging station (EVST) (step S2). In this calculation, the calculation process as described in the guide route calculation unit 33 in the electric vehicle charging station (EVST) using the guide route calculation unit 31 of FIG. 1 is performed.

  Next, it is determined whether or not there is a guide route that can reach the destination (step S3). This processing is performed by the destination reachability determination unit 39 in FIG. 1 based on the calculation result in the guidance route calculation unit 31 as described above. When it is determined in step S3 that there is no guidance route that can reach the destination, the process proceeds to step S11 to output that the destination cannot be reached at the set waypoint or destination.

  Thereafter, in the example of FIG. 2, for the reason why the destination cannot be reached, when the user goes to a specific waypoint or destination, a guidance display is displayed such that the destination cannot be reached because there is no charging station available before the battery runs out. This processing is performed by the destination / route change guide 46 in FIG.

  Next, it is determined whether or not the waypoint / destination is to be reset (step S13). When it is determined that the route is to be reset, that is, when the user operates the “return” key, step S1 is performed again. Return to and set the waypoints and destinations. If it is determined in step S13 that no further waypoints / destinations are set, that is, if a destination setting end key or the like is pressed, this processing is terminated (step S14).

  If it is determined in step S3 that there is a guidance route that can reach the destination, the process proceeds to step S4, and it is determined whether or not an electric vehicle charging station (EVST) is attached to the destination. Here, when it is determined that the EVST is attached to the destination, that is, the EVST detection unit 35 provided with the destination in the EVST detection unit 34 of the guidance route calculation unit 31 in FIG. Is detected, it is possible to return at least the way to the destination by fully charging the battery of the electric vehicle at the destination, so the guidance route is determined.

  On the other hand, when it is determined in step S4 that the EVST is not provided at the destination, the process proceeds to step S5, and the EVST closest to the destination, that is, the nearest destination EVST is detected. Thereafter, the total distance (L2 + L3) is calculated based on the distance (L2) from the current location or the final charging point to the destination and the distance (L3) from the destination to the nearest EVST (step S6).

  Next, it is determined whether or not the total distance (L2 + L3) is shorter than the distance (L1) that can be traveled when the electric vehicle is fully charged (step S7). Here, the total distance is shorter than the full charge travel distance, that is, when it is determined that it is possible to travel to the nearest EVST via the destination when it is fully charged at the current location or the last use EVST. A guidance route is determined (step S15).

  On the other hand, when it is determined in step S7 that the total distance is not shorter than the full charge travel distance, the optimum final charge EVST corresponding to the position of the nearest destination EVST is selected as will be described later in the example of FIG. Then, the guidance route is reset (step S8). After the resetting, it is determined whether or not a route that can travel from the destination to the nearest EVST is found (step S9). If found, the process proceeds to step S15 to determine the reset guiding route.

  If it is determined in step S9 that a route that can travel from the destination to the nearest EVST has not been found, the process proceeds to step S10, where a warning is output indicating that the vehicle cannot reach the destination after reaching the destination.

  The operation will be described with reference to FIG. 3, which is the most simplified embodiment of the present invention. The example of FIG. 3 shows an example in which the vehicle can travel from the current location to the destination without using an electric vehicle charging station (EVST), provided that the destination is not equipped with a charging station. An example is shown in which a warning is output when it is detected that the vehicle cannot travel after reaching the ground.

  That is, in the example of FIG. 3, as the most basic aspect of the present invention, when an electric vehicle (EV) having a travelable distance of 120 km when fully charged is going to the destination from the current location in a fully charged state, By setting the destination with the navigation device, the route from the current location to the destination and its distance can be obtained, and thereby it is calculated that there is 70 km from the current location to the destination. This distance is a distance that can be sufficiently traveled without having to be charged halfway due to a full charge, so that it is determined in step S3 in FIG.

  In the example of FIG. 3, since there is no EVST at the destination, it is determined that there is no EVST at the destination facility in step S4 of FIG. 2, and the EVST closest to the destination is searched in step S5. The example which detected the destination nearest charging station A is shown. Thereafter, in step S6, the total distance from the current location to the destination and the distance from the destination to the nearest destination EVST is calculated. In the example shown in the figure, the distance L2 from the current location to the destination is 70 km. In the example, the distance L3 to the contact EVST is 60 km, and therefore the total distance is 130 km.

  Thereafter, in step S7, it is determined whether or not the total distance is shorter than the full charge travel distance (L1). Since L1 is 120 km and L2 + L3 = 130 km in the illustrated example, L1 <L2 + L3, and the process proceeds to step S8. Then, the optimum final charge EVST corresponding to the position of the nearest destination EVST is selected and the guidance route is reset. In the illustrated example, since there is no EVST from the current location to the destination, there is no optimum EVST.

  In the operation flow of FIG. 2, it is then determined in step S8 whether or not a route that can travel from the destination to the nearest destination EVST is found. In the illustrated example, the route is not found as described above. Even if the vehicle can arrive at the vehicle, a warning is output indicating that the vehicle will not be able to travel after that. The example in FIG. 3 shows a warning output example of “dangerous battery arriving after arrival at destination” as shown in FIG. 3B, and FIG. 3C shows “danger after arrival at destination on route currently being set. It shows an example of warning and guidance that “cannot drive to the nearest charging station”.

  In this way, in the present invention, when setting the destination before the vehicle starts running, it is possible to warn that it becomes impossible to run due to running out of battery after arriving at the destination, and those who do not go to this destination It is possible to inform the user that it is better to change to another destination when necessary.

  In the embodiment of FIG. 3, the closest EVST of the destination is located far from the destination as viewed from the current location, whereas in the embodiment of FIG. 4, the closest EVST is present on the current location side. That is, an example is shown in which the nearest destination EVST exists between the current location and the destination. In the illustrated example, since the vehicle can travel from the current location to the destination in the first fully charged state, there is no need to consider charging on the way, but in the next run after arrival at the destination, FIG. As shown in (a), as in the example of FIG. 3 described above, since the nearest destination EVST (B) exists at a location 60 km away from the destination, the battery runs out.

  In such a case, in the present invention, the optimum final charge EVST corresponding to the position of the nearest destination EVST is selected in step S8 of FIG. 2, and the guidance route is reset. That is, because the nearest EVST of the destination exists on the near side of the destination, by fully charging at this charging stand before arriving at the destination, it becomes possible to travel 120 km from here and even after arriving at the destination Since at least (120 km−40 km =) 80 km can be traveled, it can be seen that it is possible to travel to the nearest charging station B, and the subsequent travel can be continued.

  Therefore, in the present invention, the optimum final charge EVST (B) corresponding to the position of the nearest destination EVST is selected in step S8 in FIG. 3, and the most appropriate setting initially set as shown in FIG. Even if it becomes a little detour from the route c, the guidance route passing through the route e and the route d is reset in consideration of the travel after reaching the destination.

  In this way, in the determination in step S9, it is determined that a route that can travel from the destination to the nearest EVST has been found, and the guide route is determined in step S15. Therefore, the warning output in step S10 is not performed. When actually driving by setting a guide route as shown in FIG. 4B, the calculation result as described above is stored, and when approaching the nearest charging station B after arrival at the destination, It is preferable to provide guidance so as not to forget to fully charge the battery at the charging stand in consideration of the traveling of the vehicle.

  In the example shown in FIG. 4, when the nearest destination EVST exists between the current location and the destination, by using the nearest destination EVST, the subsequent travel can be performed even after arrival at the destination. In the example shown in FIG. 5, for example, the nearest destination EVST exists between the current location and the destination, and it is not appropriate to fully charge there. ing.

  That is, the example shown in FIG. 5 shows an example when the nearest destination EVST exists at a position of 70 km on the current location side from the destination. In the example of FIG. 5A, for example, the route c is the shortest route. When the destination can be reached after being set, the closest EVST is 70 km away from the destination, so that it is impossible to travel thereafter even if the destination can be reached.

  At this time, in step S8 of FIG. 2, an attempt is made to select the optimum final charge EVST corresponding to the position of the nearest destination EVST, and to select to charge at the nearest destination charging station C in FIG. If an attempt is made to set a route passing through route g and route f in FIG. (B), then only 50 km can be traveled with the remaining power amount after arrival at the destination, so it is not possible to travel to the nearest charging station C at this time. In step S9 of FIG. 2, it is determined that a route that can travel from the destination to the nearest EVST has not been found, and in step S10, the warning is output as described above.

  As shown in the figure, even if the nearest destination EVST exists between the destination and the current location, the distance from the destination to the nearest EVST can be reached when the electric vehicle is fully charged. This is because it is larger than 60 km, which is a half of the distance of 120 km, so that it cannot travel to the charging station after arriving at the destination. Such processing is performed in step S8 and step S9 in FIG.

  FIG. 6 shows an example of an aspect similar to the example of FIG. 3 in which the nearest destination EVST exists at a position far from the destination as viewed from the current location. In the example shown in FIG. 6, the vehicle can travel from the current location to the destination by full charge of the current location, and after the route h is obtained, the nearest destination EVST cannot be reached for the same reason as in FIG. It has been determined.

  In this state, in step S8 in FIG. 2, as a result of attempting to reset the guidance route as described above, it is found that the charging station D exists between the current location and the destination as shown in FIG. 6B. Is shown. That is, even if it is found in step S3 in FIG. 2 that the normal route can be reached by the route h in FIG. 6 by the route h in FIG. 6, the route from the destination to the nearest EVST is reached on the route. When it is found that the user cannot wear, in step S8, a process of resetting the guidance route considering the charging station is performed.

  Here, when the charging station D is found 50 km before the destination between the current location and the destination, it is possible to travel 70 km even if the vehicle reaches the destination by fully charging here. The vehicle can travel to the charging station A which is EVST. Therefore, in such a case, the warning in step S10 in FIG. 2 is not performed, and a new route is set as the guidance route.

  FIGS. 3 to 6 show an example in which the vehicle can travel without being charged from the current location to the destination in order to simplify the description of the present invention. However, FIG. An example is shown when it cannot reach the ground.

  That is, the example shown in FIG. 7 shows the same running mode as the conventional example shown in FIG. In the example shown in FIG. 7, when an electric vehicle (EV) that can travel on a full charge is 120 km and tries to travel from the current location shown in the figure to the destination, the guidance route shown as route a is calculated for a vehicle such as a gasoline vehicle. On the other hand, since the distance is 160 km, the electric vehicle cannot reach the destination unless it is charged halfway, so the electric vehicle is relatively close to the limit of the driving range as close as possible to the guidance route. An automobile charging station (EVST) is detected.

  As a result, a charging station A 90 km away from the current location is found, and a route b to the charging station A is determined. Then, assuming that the charging station A is fully charged and calculating the route to the destination from the charging station A, the route c is obtained. Since the distance is 70 km, the vehicle travels to the destination in that state.

  After arriving at the destination in such a state, when trying to travel next, the charging station closest to the destination is the charging station B, and when the distance to that is 60 km, the state where the destination has been reached Since the remaining electric energy in the vehicle can travel only 50 km, the charging station B cannot be reached. Naturally, at this time, the vehicle cannot travel to the charging station A that has been previously charged.

  In the present invention, this state is detected by the nearest destination EVST traveling availability determination unit 42 in FIG. 1 to detect that the vehicle cannot travel to the charging station closest to the destination. Accordingly, a warning display as shown in FIGS. 3B and 3C and a similar warning output by voice are performed. Thus, even when the charging station is used between the current location and the destination, the present invention can be implemented in the same manner as in FIG. 3, and in the operation flow of FIG. The distance from the final charging point to the destination is calculated as L2. Further, the process of selecting the optimum final charge EVST corresponding to the position of the nearest destination EVST in step S8 and resetting the guidance route is performed in the same manner.

  FIG. 7B further shows an example when the destination is reached using a plurality of charging stations because the distance from the current location to the destination is long. Here, the final location closest to the destination is shown. A route using the charging station P is shown. Also here, it can be seen that the present invention can be implemented by the same processing as in FIG. Further, the process of selecting the optimum final charge EVST corresponding to the position of the nearest destination EVST in step S8 in FIG. 2 and resetting the guidance route is performed in the same manner.

  In the above embodiment, an example is shown in which the electric vehicle according to the present invention travels along the guidance route. However, the present invention is going to travel from now on when the next travel becomes impossible after arriving at the destination. A warning that it is better not to go to the place is output, and it is only necessary to obtain and confirm the information, so it is not always necessary to travel along the guidance route.

  Further, in the above-described embodiment, an example in which a desired operation is performed by a navigation device mounted on a vehicle is shown. However, various mobile devices with a navigation function including a portable navigation device and a mobile phone with a navigation function are also included. The information device can be used effectively for determining whether or not the vehicle can travel after arrival at the destination.

10 System controller
11 GPS receiver 12 Travel distance / azimuth detection unit 13 Vehicle position detection unit 14 VICS information input unit 15 Remote control 16 Voice recognition unit 17 Instruction signal input unit 18 Map / information data recording medium 19 Data input / output unit 20 Monitor 21 Image output unit 22 Speaker 23 Audio Output Unit 31 Guidance Route Calculation Unit 32 Destination / Intermediate Point Setting Unit 33 Electric Vehicle Charging Stand (EVST) Utilization Guide Route Calculation Unit 34 Electric Vehicle Charging Stunt (EVST) Detection Unit 35 Destination EVST
36 Nearest destination EVST
37 Guide route proximity EVST
38 EVST selection unit 39 Destination reachability determination unit 40 Destination unreachability cause detection output unit 41 Destination closest EVST / destination distance calculation unit 42 Destination nearest EVST travel availability determination unit 43 Unable to travel after reaching destination Warning output unit 44 Current location or final use EVST / destination distance calculation unit 45 Travelable distance calculation unit after arrival at destination 46 Destination / route change guide unit 47 Guide route storage unit 48 Guide route guide unit

Claims (5)

Destination setting means for setting the destination;
A guide route calculating means for calculating a guide route from the current location to the destination;
A destination closest charging station detecting means for detecting an electric vehicle charging station closest to the destination;
When the route to the destination can be calculated by the guidance route calculation means, the electric vehicle closest to the destination passes through the destination from the final electric vehicle charging station that is charged lastly to reach the current location or the destination. A destination closest electric vehicle charging station travel enable / disable determining means for determining whether the travelable distance at the time of full charging of the electric vehicle is shorter than the distance to the electric vehicle charging station detected by the charging stand detecting means;
When the destination closest electric vehicle traveling availability determination means determines that the destination closest electric vehicle charging station cannot be reached, a warning is output indicating that the vehicle cannot travel after reaching the destination. A navigation device with a destination setting support function for an electric vehicle, comprising a warning output means. When the guidance route to the destination can be calculated by the guidance route calculation means, the vehicle further comprises an electric vehicle charging station selection means for selecting an electric vehicle charging station for traveling from the destination to the nearest electric vehicle charging station of the destination. ,
When the electric vehicle charging station selecting means cannot select an electric vehicle charging station that is fully charged at the final electric vehicle charging station and can travel to the nearest electric vehicle charging station via the destination, 2. The navigation apparatus with a destination setting support function for an electric vehicle according to claim 1, wherein the travel impossible warning output means after reaching the destination outputs a warning.   In the electric vehicle charging station selection means, when the destination nearest electric vehicle charging station exists between the current location or the final electric vehicle charging station, the destination nearest electric vehicle charging station is set as the final electric vehicle charging station. The navigation device with a destination setting support function for an electric vehicle according to claim 2, wherein the navigation device is selected.   In the electric vehicle charging station selection means, when the electric vehicle charging station closest to the destination is present or far from the final electric vehicle charging station, the electric vehicle charging station is present or between the final electric vehicle charging station and the destination. The navigation apparatus with a destination setting support function for an electric vehicle according to claim 2, wherein the electric vehicle charging station to be selected is selected as a final electric vehicle charging station. A destination-equipped electric vehicle charging station detecting means for detecting that an electric vehicle charging station is installed at the destination;
When the route to the destination can be calculated by the guidance route calculation unit, when it is detected that the electric vehicle charging station is installed at the destination by the destination electric vehicle charging station detection means, 2. The navigation device with a destination setting support function for an electric vehicle according to claim 1, wherein processing for outputting a warning indicating that the vehicle cannot travel after reaching the destination is not performed.

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