Electric vehicle

Abstract

To facilitate decision-making of a user on whether or not to perform external power feeding at a power feeding spot.SOLUTION: An electric vehicle comprises a power storage device, a power feeding device that supplies power from the power storage device to the outside, a communication device, a navigation device, and a control device that controls the power feeding device and the communication device and exchanges data with the navigation device. When a demand for external power feeding from a power feeding spot is confirmed, in a case where the power feeding revenue corresponding to the power feeding amount at the power feeding spot is greater than the required cost obtained by multiplying the average unit price per unit power for charging the power storage device with external power by the sum of the power consumption amount required for a round trip from the current location to the power feeding spot and the power feeding amount, the control device checks the user's intention whether to perform the external power feeding.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to an electric vehicle, and more particularly to an electric vehicle capable of supplying electric power from an on-board power storage device to an external device. [Background technology]

[0002] Conventionally, for this type of electric vehicle, there has been proposed a vehicle that displays the route from the current location to the charging / discharging spot, the distance to the charging / discharging spot, the time required to reach the charging / discharging spot, and incentives based on the distance from the charging / discharging spot and the time to reach the spot (see, for example, Patent Document 1). Displaying such data makes it easier for the user to make a decision about charging / discharging at the charging / discharging spot. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 5529894 Summary of the Invention [Problem to be solved by the invention]

[0004] However, although the electric vehicle described above displays incentives, it is not possible to determine whether it would be economically advantageous for the individual not to charge at a charging spot, due to the balance between the power consumed in traveling to the charging spot and the income earned from charging at the charging spot.

[0005] The main object of the electric vehicle of the present disclosure is to make it easier for the user to decide whether or not to perform external power feeding at a power feeding spot. [Means for solving the problem]

[0006] The electric vehicle of the present disclosure employs the following measures to achieve the above-mentioned main object.

[0007] The electric vehicle of the present disclosure includes: a power storage device; a power supply device that supplies power from the power storage device to an external device; a communication device; A navigation device; a control device that controls the power supply device and the communication device and exchanges data with the navigation device; An electric vehicle comprising: When the control device confirms the demand for external power supply from the power supply spot, if the power supply income according to the amount of power supplied at the power supply spot is greater than a necessary cost obtained by multiplying an average unit price per unit power when charging the power storage device using external power by the sum of the amount of power consumption required for a round trip from the current location to the power supply spot and the amount of power supplied, the control device confirms with the user whether or not to perform external power supply. It is characterized by:

[0008] An electric vehicle disclosed herein includes a power storage device, a power supply device that supplies power from the power storage device to an external device, a communication device, a navigation device, and a control device that controls the power supply device and the communication device and exchanges data with the navigation device. When the control device confirms demand for external power supply from a power supply spot, if the power supply income obtained by multiplying the amount of power supplied at the power supply spot by the power supply unit price is greater than the necessary cost (average unit price × (power consumption + amount of power supplied)) obtained by multiplying the average unit price per unit of power when charging the power storage device using external power by the sum of the amount of power consumed and the amount of power supplied for a round trip from the current location to the power supply spot. In this way, by confirming with the user whether or not to perform external power supply when the power supply income is greater than the necessary cost, the user's decision on whether or not to perform external power supply at the power supply spot can be made easier.

[0009] In such an electric vehicle disclosed herein, when the user confirms his / her intention to perform external power feeding, the control device may reserve external power feeding at the power feeding spot and provide route guidance using the navigation device with the power feeding spot as a destination. This makes it easier to reserve the power feeding spot and to travel to the power feeding spot. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram showing an outline of the configuration of an electric vehicle 20 according to an embodiment of the present disclosure. [Figure 2] 4 is a flowchart showing an example of an external power supply response process executed by an electronic control unit 50. DETAILED DESCRIPTION OF THE INVENTION

[0011] Next, a mode (embodiment) for carrying out the present disclosure will be described. Fig. 1 is a configuration diagram showing an outline of the configuration of an electric vehicle 20 as one embodiment of the present disclosure. As shown in the figure, the electric vehicle 20 of the embodiment includes a motor 22, an inverter 24, a battery 30, a bidirectional charging device 32, a navigation device 80, and an electronic control unit 50.

[0012] The motor 22 is configured as, for example, a three-phase AC motor, and includes a rotor with a permanent magnet embedded in the rotor core and a stator with a three-phase coil wound around the stator core. The rotor of the motor 22 is connected to a drive shaft 26 that is connected to drive wheels 28 a, 28 b via a differential gear 27.

[0013] The inverter 24 is used to drive the motor 22. The inverter 24 is connected to the battery 30 via a power line, and is configured by a well-known inverter circuit having six transistors as switching elements and six diodes connected in parallel to each of the six transistors.

[0014] The battery 30 is configured as a lithium ion secondary battery or a nickel-metal hydride secondary battery, and is connected to the inverter 24 via a power line.

[0015] The bidirectional charging device 32 is connected to the power line between the battery 30 and the inverter 24, and is configured as a circuit that charges the battery 30 with power from an external power source and supplies power from the battery 30 to an external power supply. The bidirectional charging device 32 is equipped with a connector 34 for connecting to an external charging stand or an external power supply stand.

[0016] The electronic control unit 50 is configured as a microcomputer having a CPU 51, ROM 52, RAM 53, flash memory 54, and input / output and communication ports (not shown). Signals from various sensors are input to the electronic control unit 50 via the input ports. Examples of signals input to the electronic control unit 50 include a battery voltage Vb from a voltage sensor 31a attached between the output terminals of the battery 30, a battery current Ib from a current sensor 31b attached to the power line, and a battery temperature Tb from a temperature sensor 31c attached to the battery 30. Other signals input to the electronic control unit 50 include an ignition signal from an ignition switch 60, a vehicle speed V from a vehicle speed sensor 61, an acceleration α from an acceleration sensor 62, and a road gradient θr from a gradient sensor 63. Other signals include a shift position signal SP from a shift position sensor 65 that detects the position of a shift lever 64, an accelerator opening Acc from an accelerator pedal position sensor 67 that detects the depression amount of an accelerator pedal 66, and a brake pedal position BP from a brake pedal position sensor 69 that detects the depression amount of a brake pedal 68. Furthermore, an on / off signal from an air conditioning switch (not shown) that instructs the air conditioning device 74 to be on or off can also be included.

[0017] Various control signals are output via the output port from the electronic control unit 50. Examples of the control signals output from the electronic control unit 50 include a display control signal to the display device 70, a communication control signal to the communication device 72, and an air conditioning control signal to the air conditioning device 74.

[0018] The navigation device 80 includes a main body 82 with a built-in control unit, a GPS antenna 84 that receives information about the current location of the vehicle, and a display 86. The control unit of the main body 82 has a storage medium (e.g., a hard disk or SSD) that stores map information and the like, an input / output port, and a communication port. The map information stores service information (e.g., tourist information, parking lots, etc.) and road information for each driving section (e.g., between traffic lights and between intersections) as a database. The road information includes distance information, road width information, number of lanes information, area information (urban or suburban), type information (general road or expressway), gradient information, legal speed limit, number of traffic lights, turning radius of each curve, etc. The display 86 displays various information such as information about the current location of the vehicle and the planned route to the destination, and is configured as a touch panel display that allows the user to input various instructions. When a destination is set by a user operating the display 86, the main body 82 of the navigation device 80 sets a planned driving route from the current location of the vehicle to the destination based on map information stored in the main body 82 and the current location and destination of the vehicle obtained from the GPS antenna 84, and displays the set planned driving route on the display 86 to provide route guidance.

[0019] Next, the operation of the electric vehicle 20 of this embodiment configured as described above, particularly the operation when a power supply request is made from an external power supply station, will be described. Figure 2 is a flowchart showing an example of an external power supply response process executed by the electronic control unit 50. This external power supply response process is executed when the ignition switch 60 is turned on.

[0020] When the external power supply response process is executed, the electronic control unit 50 first waits until a request for external power supply is made from a power supply station within a predetermined range (step S100). The predetermined range is a range of a predetermined distance from the current position of the vehicle (for example, 10 km, 20 km, etc.). The request for external power supply can be received by receiving the request from the power supply station via the communication device 72.

[0021] When a request for external power supply is made from a power supply station within a predetermined range, the amount of power consumption Wc required for a round trip to the requested power supply station is calculated (step S110). The amount of power consumption Wc can be calculated by multiplying the round trip distance from the vehicle's current position to the power supply station by a coefficient that takes into account the amount of power per unit traveling distance and the outside temperature.

[0022] Next, the amount of power supply Ws and the power supply income A to be paid to the user when power is supplied are obtained from the power supply station via the communication device 72 (step S120). The power supply income A can be obtained by multiplying the payment price per unit of power supply by the amount of power supply Ws. Therefore, the payment price per unit of power supply may be input instead of the power supply income A, and the power supply income A may be calculated on the vehicle side.

[0023] Next, the necessary cost B is calculated by multiplying the average price Era per unit of power paid when charging the battery 30 using power from an external power source at a charging station by the sum of the amount of power consumed Wc and the amount of power supplied Ws (step S130). Then, it is determined whether the power supply income A is greater than the necessary cost B (step S140). If the power supply income A is equal to or less than the necessary cost B, it is determined that there is no need to respond to the external power supply, and the process returns to the process of waiting for a request for external power supply from a power supply station within the predetermined range of step S100.

[0024] If it is determined in step S140 that the power supply income A is greater than the necessary cost B, the user is notified that there is a request for external power supply (step S150), and the process waits for approval from the user within a predetermined time after the user is notified (step S160). The user can be notified by displaying the notification on the display device 70. The user can approve the request by operating the display device 70. If it is determined that the user has not approved within the predetermined time after the user is notified, the process returns to step S100, where the process waits for a request for external power supply from a power supply station within a predetermined range.

[0025] If it is determined in step S160 that the user has approved the request within a predetermined time period since the notification to the user, a reservation for power supply is made at the power supply station related to the request (step S170), and navigation device 80 starts providing route guidance from the current location to the power supply station (step S180), and this process ends.

[0026] In the electric vehicle 20 of the embodiment described above, when it is confirmed that there is a demand for external power feeding at a power feeding station, the system acquires the amount of power Ws to be fed at the power feeding station and the power feeding income A, and calculates a necessary cost B by multiplying the average price Era per unit of power paid when charging the battery 30 at the charging station using power from an external power source by the sum of the amount of power consumed Wc and the amount of power fed Ws. If the power feeding income A is greater than the necessary cost B, the system notifies the user that there is a request for external power feeding. This makes it easier for the user to decide whether or not to perform external power feeding at a power feeding station. Furthermore, when it is confirmed that the user intends to perform external power feeding, a reservation for power feeding at the power feeding station is made and route guidance to the power feeding station is provided, making it easier to make a reservation at the power feeding station and to travel to the power feeding station.

[0027] In the embodiment, the request for external power supply is a request for power supply from a power supply station within a predetermined range, but the request may also be a request from a power supply spot such as a commercial facility such as a shopping mall or an event venue.

[0028] The correspondence between the main elements of the embodiment and the main elements of the invention described in the "Means for Solving the Problem" section will be explained below. In the embodiment, the battery 30 corresponds to the "power storage device," the bidirectional charging device 32 corresponds to the "power supply device," the communication device 72 corresponds to the "communication device," the navigation device 80 corresponds to the "navigation device," and the electronic control unit 50 corresponds to the "control device."

[0029] The correspondence between the main elements of the embodiments and the main elements of the invention described in the "Means for Solving the Problem" section does not limit the elements of the invention described in the "Means for Solving the Problem" section, since the embodiments are examples for specifically explaining the mode for implementing the invention described in the "Means for Solving the Problem" section. In other words, the interpretation of the invention described in the "Means for Solving the Problem" section should be based on the description in that section, and the embodiments are merely specific examples of the invention described in the "Means for Solving the Problem" section.

[0030] The above describes the form for carrying out the present invention using an embodiment, but the present invention is not limited to such an embodiment in any way, and it goes without saying that the present invention can be carried out in various forms within the scope that does not deviate from the gist of the present invention. [Industrial Applicability]

[0031] The present invention can be used in the electric vehicle manufacturing industry and the like. [Explanation of symbols]

[0032] 20 electric vehicle, 22 motor, 24 inverter, 26 drive shaft, 27 differential gear, 28a, 28b drive wheels, 30 battery, 31a voltage sensor, 31b current sensor, 31c temperature sensor, 32 bidirectional charging device, 34 connector, 50 electronic control unit, 51 CPU, 52 ROM, 53 RAM, 54 flash memory, 60 ignition switch, 61 vehicle speed sensor, 62 acceleration sensor, 63 gradient sensor, 64 shift lever, 65 shift position sensor, 66 accelerator pedal, 67 accelerator pedal position sensor, 68 brake pedal, 69 brake pedal position sensor, 70 display device, 72 communication device, 74 air conditioning device, 80 navigation device, 82 main body, 84 GPS antenna, 86 display.

Claims

[Claim 1] a power storage device; a power supply device that supplies power from the power storage device to an external device; a communication device; A navigation device; a control device that controls the power supply device and the communication device and exchanges data with the navigation device; An electric vehicle comprising: When the control device confirms the demand for external power supply from the power supply spot, if the power supply income according to the amount of power supplied at the power supply spot is greater than the necessary cost obtained by multiplying the average unit price per unit power when charging the power storage device using external power by the sum of the amount of power consumption required for a round trip from the current location to the power supply spot and the amount of power supplied at the power supply spot, the control device confirms with the user whether or not to perform external power supply. An electric vehicle characterized by:

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