Charge control device, charge control method, and charge control program

Abstract

To provide a charge control device, a charge control method, and a charge control program that can achieve appropriate charging and discharging according to user requests.SOLUTION: A controller 5 includes: an acquisition unit 11 that acquires a planned travel distance of a vehicle; a communication unit 10 that acquires a current remaining capacity of a battery; a calculation unit 13 that calculates an amount of power required by the vehicle based on the planned travel distance acquired by the acquisition unit 11; a determination unit 14 that determines whether to charge or discharge the battery based on the remaining capacity acquired by the communication unit 10 and the amount of power required calculated by the calculation unit 13; and a control unit 15 that causes charging and discharging to be carried out between two batteries when conditions of two vehicles match, in the conditions of the two vehicles based on determination results of the determination unit 14.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a charge control device, a charge control method, and a charge control program. [Background technology]

[0002] Patent Document 1 discloses a charging device including: a power receiving connection port connected to a power receiving battery of a power receiving electric vehicle; a power feeding connection port connected to a power feeding power supply of a power feeding vehicle; a first charging cable having a power feeding connector connected to the power feeding connection port; a control box connected to the first charging cable and having a power feeding voltage detector, a power receiving voltage detector, and a DC-DC converter that compares the detected voltage of the power feeding voltage detector with the detected voltage of the power receiving voltage detector and transforms the power feeding side voltage to a voltage that is a predetermined value higher than the power receiving side voltage; and a second charging cable connected to the control box and having a power receiving side connector connected to the power receiving connection port. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-267561 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-described charging device, one vehicle and another vehicle are connected to the charging device, and the first vehicle supplies power to the other vehicle to charge the other vehicle. However, this charging device does not take into account the vehicle's planned travel schedule after charging and discharging. In this case, if the first vehicle supplies too much power to the other vehicle or if the first vehicle supplies too little power to the other vehicle, problems such as the vehicle being unable to travel to its destination may occur. As a result, it is not possible to appropriately charge and discharge the vehicle in accordance with the user's needs.

[0005] An object of the present invention is to provide a charge control device, a charge control method, and a charge control program that can realize appropriate charging and discharging according to user requests. [Means for solving the problem]

[0006] (1) The charge control device of the present invention is a charge control device that controls a charger that charges and discharges between a first storage battery of a first vehicle and a second storage battery of a second vehicle, and includes: a first acquisition unit that acquires a planned driving distance of the first vehicle; a second acquisition unit that acquires a current remaining capacity of the first storage battery; a calculation unit that calculates the amount of power required by the first vehicle based on the planned driving distance acquired by the first acquisition unit; a judgment unit that determines whether to charge or discharge the first storage battery based on the remaining capacity acquired by the second acquisition unit and the amount of power calculated by the calculation unit; and a control unit that causes charging and discharging to be performed between the first storage battery and the second storage battery when the conditions of the first vehicle and the conditions of the second vehicle based on the judgment result of the judgment unit match.

[0007] In the charge control device according to the present invention, a calculation unit calculates the amount of power required by the first vehicle based on the planned driving distance. In the charge control device, a determination unit determines whether to charge or discharge the first storage battery based on the remaining capacity and the amount of power required, and, when the conditions for the first vehicle and the conditions for the second vehicle based on the determination result of the determination unit match, charges and discharges between the first storage battery and the second storage battery. In this way, the charge control device takes into account the amount of power required to reach the destination, and when the conditions for the first vehicle and the conditions for the second vehicle match, charges and discharges between the first storage battery and the second storage battery. Therefore, the charge control device can avoid excessive discharging of the first storage battery in the first vehicle or not charging the first storage battery with the amount of power required for the first vehicle to travel to the destination. Therefore, the charge control device can achieve appropriate charging and discharging according to the user's requests.

[0008] (2) In the charging control device of (1) above, the calculation unit may calculate the required amount of power based on the power consumption and total battery capacity of the first vehicle. In this configuration, the power consumption and total battery capacity are used to calculate the required amount of power, so that the required amount of power can be calculated according to the characteristics of the first vehicle.

[0009] (3) In the charging control device of (1) or (2) above, when there are multiple second vehicles, the control unit may determine whether the conditions of the first vehicle match the conditions of the second vehicles, starting with the second vehicle with the highest priority, based on priorities set for each of the multiple second vehicles. In this configuration, when there are multiple second vehicles, it is possible to determine whether the conditions match based on the priorities. Therefore, it is possible to avoid a situation in which, for example, a second vehicle that requests charging / discharging after a second vehicle is charged / discharged before the first second vehicle.

[0010] (4) A charging control method according to the present invention is a charging control method for controlling a charger that charges and discharges between a first storage battery of a first vehicle and a second storage battery of a second vehicle, and includes a first acquisition step of acquiring a planned driving distance of the first vehicle, a second acquisition step of acquiring a current remaining capacity of the first storage battery, a calculation step of calculating the amount of power required by the first vehicle based on the planned driving distance acquired in the first acquisition step, a judgment step of determining whether to charge or discharge the first storage battery based on the remaining capacity acquired in the second acquisition step and the amount of power calculated in the calculation step, and a control step of causing charging and discharging to be performed between the first storage battery and the second storage battery when the conditions of the first vehicle and the conditions of the second vehicle match based on the judgment result in the judgment step.

[0011] In the charge control method according to the present invention, a calculation step calculates the amount of power required by the first vehicle based on the planned traveling distance. In the charge control method, a determination unit determines whether to charge or discharge the first storage battery based on the remaining capacity and the amount of power required, and, when the conditions for the first vehicle and the conditions for the second vehicle based on the determination result in the determination step match, charging and discharging are performed between the first storage battery and the second storage battery. In this way, the charge control method takes into account the amount of power required to reach the destination, and when the conditions for the first vehicle and the conditions for the second vehicle match, charging and discharging are performed between the first storage battery and the second storage battery. Therefore, the charge control method can avoid excessive discharging of the first storage battery in the first vehicle or not charging the first storage battery with the amount of power required for the first vehicle to travel to the destination. Therefore, the charge control method can achieve appropriate charging and discharging according to the user's requests.

[0012] (5) The charging control program of the present invention is a charging control program for controlling a charger that charges and discharges between a first storage battery of a first vehicle and a second storage battery of a second vehicle, and causes a computer to execute the following steps: a first acquisition step for acquiring a planned driving distance of the first vehicle; a second acquisition step for acquiring a current remaining capacity of the first storage battery; a calculation step for calculating a required amount of power required by the first vehicle based on the planned driving distance acquired in the first acquisition step; a judgment step for determining whether to charge or discharge the first storage battery based on the remaining capacity acquired in the second acquisition step and the required amount of power calculated in the calculation step; and a control step for performing charging and discharging between the first storage battery and the second storage battery when the conditions of the first vehicle and the conditions of the second vehicle match based on the judgment result in the judgment step.

[0013] In the charge control program according to the present invention, a calculation step calculates the amount of power required by the first vehicle based on the planned traveling distance. In the charge control program, a determination unit determines whether to charge or discharge the first storage battery based on the remaining capacity and the amount of power required, and when the conditions for the first vehicle and the conditions for the second vehicle based on the determination result in the determination step match, charging and discharging are performed between the first storage battery and the second storage battery. In this way, the charge control program takes into account the amount of power required to reach the destination, and when the conditions for the first vehicle and the conditions for the second vehicle match, charging and discharging are performed between the first storage battery and the second storage battery. Therefore, the charge control program can avoid over-discharging of the first storage battery in the first vehicle or not charging the first storage battery with the amount of power required for the first vehicle to travel to the destination. Therefore, the charge control program can achieve appropriate charging and discharging according to the user's request. [Effects of the Invention]

[0014] According to the present invention, appropriate charging and discharging can be achieved in accordance with the user's needs. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a diagram showing the configuration of a charging system. [Figure 2] FIG. 2 is a schematic diagram showing a state in which a first vehicle and a second vehicle are connected to the charging / discharging device. [Figure 3] FIG. 3(a) is a diagram showing the configuration of the first vehicle, and FIG. 3(b) is a diagram showing the configuration of the second vehicle. [Figure 4] FIG. 4 is a diagram showing the configuration of the charge / discharge device. [Figure 5] FIG. 5 is a diagram showing an example of a screen displayed on the touch panel display. [Figure 6] FIG. 6 is a diagram illustrating the configuration of the controller. [Figure 7] FIG. 7 is a flowchart showing a charging method in the charging system. [Figure 8] FIG. 8 is a flowchart showing a charging method in the charging system. [Figure 9] FIG. 9 is a flowchart showing a charging method in the charging system. [Figure 10] FIG. 10 is a flowchart showing a charging method in the charging system. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are designated by the same reference numerals, and redundant description will be omitted.

[0017] FIG. 1 is a diagram showing the configuration of a charging system. As shown in FIG. 1, the charging system 100 includes a plurality of charging / discharging devices (chargers) 1. In this embodiment, the charging system 100 includes three charging / discharging devices 1. The plurality of charging / discharging devices 1 are connected to a grid power P via an AC / DC inverter 102. The plurality of charging / discharging devices 1 can receive power from the grid power P. The plurality of charging / discharging devices 1 are connected so as to be able to communicate with each other. In this embodiment, in order to distinguish between the plurality of charging / discharging devices 1, they may be referred to as charging / discharging device 1A, charging / discharging device 1B, and charging / discharging device 1C.

[0018] FIG. 2 is a schematic diagram showing a state in which a first vehicle 110 and a second vehicle 120 are connected to the charging / discharging device 1. As shown in FIG. 2, the charging system 100 is a system that charges a battery of one of the first vehicle 110 and the second vehicle 120 using a battery of the other vehicle. The first vehicle 110 and the second vehicle 120 may be an EV (Electric Vehicle), a PHV (Plug-in Hybrid Vehicle), an HEV (Hybrid Electric Vehicle), or the like. In this embodiment, the vehicle on the power supplying (outputting power) side is referred to as a power supplying vehicle, and the vehicle on the power receiving (receiving power) side is referred to as a charging vehicle. The first vehicle 110 and the second vehicle 120 may be a power supplying vehicle and a charging vehicle, respectively. Hereinafter, the first vehicle 110, the second vehicle 120, the power supplying vehicle, and the charging vehicle may be simply referred to as "vehicles."

[0019] FIG. 3(a) is a diagram showing the configuration of the first vehicle 110. As shown in FIG. 3(a), the first vehicle 110 includes a first battery (first storage battery) 130 and a communication unit 140. The communication unit 140 is capable of communicating with the charging / discharging device 1. When the first vehicle 110 and the charging / discharging device 1 are connected by a charging cable C (see FIG. 2), the communication unit 140 is capable of communicating with the charging / discharging device 1. A charging gun (not shown) is provided on the charging cable C. When the charging gun is connected to the first vehicle 110, communication between the first vehicle 110 and the charging / discharging device 1 begins.

[0020] FIG. 3(b) is a diagram showing the configuration of the second vehicle 120. As shown in FIG. 3(b), the second vehicle 120 includes a second battery (second storage battery) 150 and a communication unit 160. The communication unit 160 is capable of communicating with the charging / discharging device 1. When the second vehicle 120 and the charging / discharging device 1 are connected by a charging cable C, the communication unit 160 is capable of communicating with the charging / discharging device 1. When the charging gun is connected to the second vehicle 120, communication between the second vehicle 120 and the charging / discharging device 1 begins.

[0021] Fig. 4 is a diagram showing the configuration of the charging / discharging device 1. As shown in Fig. 4, the charging / discharging device 1 includes a communication board 2, a charging circuit 3, a touch panel display 4, and a controller (charging control device) 5. The charging / discharging device 1 includes a charging cable C that can be connected to each of the first vehicle 110 and the second vehicle 120.

[0022] The communication board 2 communicates with other charging / discharging devices 1. The communication board 2 outputs information received from other charging / discharging devices 1 to the controller 5. The communication board 2 transmits information output from the controller 5 to other charging / discharging devices 1.

[0023] The charging circuit 3 may include a noise filter, a DC / DC converter, a relay circuit, etc. The charging circuit 3 outputs a predetermined amount of power from the power supply vehicle to the charging vehicle based on control by the controller 5. The charging circuit 3 outputs a predetermined amount of power from the grid power P to the charging vehicle based on control by the controller 5.

[0024] The touch panel display 4 displays various types of information. The display on the touch panel display 4 is controlled by the controller 5. The touch panel display 4 accepts operations from the user. The touch panel display 4 displays a guide screen regarding the charging method.

[0025] A screen showing items related to the planned travel distance of the first vehicle 110 and the second vehicle 120 and items related to the vehicle types of the first vehicle 110 and the second vehicle 120 is displayed on the touch panel display 4. FIG. 5 is a diagram showing an example of a screen displayed on the touch panel display 4. As shown in FIG. 5, the touch panel display 4 displays, for example, "Please enter the planned travel distance" as an item related to the planned travel distance, and an input area for inputting the planned travel distance is displayed. Methods for inputting the planned travel distance include inputting the distance by pressing the numbers displayed on the screen, selection by a drum roll, etc.

[0026] On the touch panel display 4, an item relating to the vehicle type, such as "Please select the vehicle type," is displayed, and a selection area for selecting the vehicle type is displayed. The vehicle type can be selected by, for example, a drum roll. When the "Send" button is pressed, the touch panel display 4 outputs the input distance information and the selected selection information to the controller 5.

[0027] Fig. 6 is a diagram showing the configuration (functional elements) of the controller 5. As shown in Fig. 6, the controller 5 includes a communication unit (second acquisition unit) 10, an acquisition unit (first acquisition unit) 11, a storage unit 12, a calculation unit 13, a determination unit 14, and a control unit 15.

[0028] The communication unit 10 performs CAN communication with the first vehicle 110 and the second vehicle 120. The CAN communication is communication in accordance with the CHAdeMO standard. The communication unit 10 may be a CHAdeMO controller. The communication unit 10 acquires the SOC (State Of Charge) (remaining capacity) [%] for each of the first battery 130 of the first vehicle 110 and the second battery 150 of the second vehicle 120 through communication with the first vehicle 110 and the second vehicle 120. The communication unit 10 outputs capacity information related to the SOC to the determination unit 14.

[0029] The acquisition unit 11 acquires the planned driving distance of the first vehicle 110 and the second vehicle 120. The acquisition unit 11 acquires the planned driving distance based on distance information output from the touch panel display 4. The acquisition unit 11 acquires the electricity efficiency of the first vehicle 110 and the second vehicle 120. The acquisition unit 11 acquires the electricity efficiency and total battery capacity based on selection information output from the touch panel display 4. The acquisition unit 11 references a database stored in the memory unit 12 based on the selection information (vehicle type) and acquires the electricity efficiency and total battery capacity. The acquisition unit 11 outputs the planned driving distance, electricity efficiency, and total battery capacity to the calculation unit 13.

[0030] The storage unit 12 stores a database etc. The storage unit 12 stores a database in which vehicle types, power consumption and total battery capacities are associated with each other. The database can be updated as needed via the Internet or a storage medium.

[0031] The calculation unit 13 calculates the required SOC (required amount of power) [%] required by the first vehicle 110 and the second vehicle 120 based on the planned traveling distance, power consumption, and total battery capacity acquired by the acquisition unit 11. The required SOC is the SOC required for the first vehicle 110 and the second vehicle 120 to travel the planned traveling distance. It can also be said that the required SOC is the SOC required for the first vehicle 110 and the second vehicle 120 to travel to the destination. The calculation unit 13 calculates the required SOC based on the following formula. Required SOC [%] = {(Planned driving distance [km] / Electricity consumption [km / kWh]) / Total battery capacity [kWh]} x 100 + 10 [%] In the above formula, "10[%]" is the margin of the required SOC. The margin is not limited to "10[%]" and can be set appropriately. The calculation unit 13 outputs the calculated required SOC to the determination unit 14.

[0032] The determination unit 14 determines whether to charge or discharge the battery based on the SOC acquired by the communication unit 10 and the required SOC calculated by the calculation unit 13. When the SOC is greater than the required SOC (SOC > required SOC), the determination unit 14 determines that the battery is to be discharged (determines that discharging is possible). When the SOC is greater than the required SOC, the determination unit 14 can also be said to determine that the vehicle is a power supply vehicle. When the SOC is less than the required SOC (SOC < required SOC), the determination unit 14 determines that the battery is to be charged (determines that charging is necessary). When the SOC is less than the required SOC, the determination unit 14 can also be said to determine that the vehicle is a charge vehicle. The determination unit 14 outputs the determination result to the control unit 15.

[0033] The control unit 15 performs overall control of the controller 5. The control unit 15 is a computer system or processor implemented in an integrated circuit. The control unit 15 is composed of a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc., and an input / output interface, etc. Various programs and data are stored in the ROM. The control unit 15 controls the display of the touch panel display 4. Specifically, when the charging cable C is connected to the first vehicle 110 and / or the second vehicle 120, the control unit 15 causes the touch panel display 4 to display a predetermined screen (see FIG. 5).

[0034] When the conditions of the first vehicle 110 and the conditions of the second vehicle 120 based on the determination result of the determination unit 14 match (match), the control unit 15 causes charging and discharging to be performed between the first battery 130 and the second battery 150. The conditions of the first vehicle 110 based on the determination result of the determination unit 14 are the amount of power requested from the power supply vehicle when the determination result is charging. The conditions of the first vehicle 110 based on the determination result of the determination unit 14 are the amount of power that can be supplied to the charging vehicle when the determination result is discharging. The control unit 15 performs matching processing on the vehicles connected to the charging and discharging device 1, and starts charging when the conditions match.

[0035] In the charging system 100, when vehicles are connected to multiple charging / discharging devices 1, the control unit 15 determines whether the conditions of the power supply vehicle match the conditions of the charging vehicle, starting with the vehicle with the highest priority, based on the priority set for each of the multiple vehicles. In this embodiment, the priority may be, for example, a priority order. The priority is set based on the order of connection to the charging / discharging device 1. That is, the priority is higher if the vehicle is connected to the charging / discharging device 1 earlier than other vehicles, and lower if the vehicle is connected to the charging / discharging device 1 later than other vehicles. The control unit 15 performs a matching process for charging / discharging with other vehicles based on the priority order. The control unit 15 performs the matching process starting with the vehicle with the highest priority.

[0036] When a vehicle to be charged exists, and no dischargeable vehicle is connected to the charging / discharging device 1 (1A, 1B, 1C), or when the matching process results in no matching power supply vehicle, the control unit 15 controls so that power is supplied to the vehicle to be charged from the grid power P. When multiple vehicles are connected to multiple charging / discharging devices 1, and each vehicle requests charging, the control unit 15 controls so that the power output from the grid power P is supplied equally (divided supply) to each vehicle based on the capacity of the AC / DC inverter 102.

[0037] The control unit 15 calculates, bills, and pays the costs according to the charging and discharging. The control unit 15 calculates the cost to be paid to the power supply vehicle, the cost to be billed to the charging vehicle, etc. according to the amount of power charged and discharged or the charging time. Payment methods for the charging and discharging device 1 can be selected from cash, credit card, electronic money payment, points payment, etc. The control unit 15 may award points according to the amount of charging and discharging or the charging time.

[0038] Next, a charging method (charge control method) implemented by execution of a charge control program in charging system 100 will be described. Figures 7, 8, 9, and 10 are flowcharts showing the charging method. In the following description, a case where first vehicle 110 is connected to charging / discharging device 1A and second vehicle 120 is connected to charging / discharging device 1B will be used as an example. In addition, the following operation will mainly specifically describe the processing executed in charging / discharging device 1A, but similar processing is also executed in charging / discharging devices 1B and 1C.

[0039] 7, when the charging gun is connected to the first vehicle 110, the communication unit 10 acquires the SOC of the first vehicle 110 (step S01, second acquisition step). Next, the acquisition unit 11 acquires the planned driving distance of the first vehicle 110 based on the information input and selected on the touch panel display 4 (step S02, first acquisition step), and also acquires the electricity consumption and total battery capacity (step S03).

[0040] Next, the calculation unit 13 calculates the required SOC of the first vehicle 110 based on the planned traveling distance, electricity consumption, and total battery capacity of the first vehicle 110 (step S04, calculation step). Next, the determination unit 14 determines whether the SOC is lower than the required SOC (step S05, determination step). If the determination unit 14 determines that the SOC is lower than the required SOC (step S05: YES), it determines that the first vehicle 110 is charging (step S06). If the determination unit 14 does not determine that the SOC is lower than the required SOC (step S05: NO), that is, if the SOC is higher than the required SOC (SOC>required SOC), the process proceeds to process A.

[0041] Next, control unit 15 determines whether there are other vehicles to be charged in charging system 100 (step S07, control step). Control unit 15 determines whether there are other vehicles to be charged among the vehicles connected to other charging / discharging devices 1 through communication with other charging / discharging devices 1. If control unit 15 determines that there are other vehicles to be charged (step S07: YES), control unit 15 sets the priority of first vehicle 110 to the lowest in charging system 100 (step S08). If control unit 15 does not determine that there are other vehicles to be charged (step S07: NO), that is, if control unit 15 determines that there are no other vehicles to be charged, control unit 15 sets the priority of first vehicle 110 to the highest in charging system 100 (step S09).

[0042] Next, the control unit 15 determines whether or not there is a matching power supply vehicle (step S10). The control unit 15 acquires the priority and conditions (discharge amount) of the power supply vehicle among the vehicles currently connected to the multiple charging / discharging devices 1 (1A, 1B, 1C), and checks for matching with a power supply vehicle with the same priority. That is, the control unit 15 determines whether or not there is a power supply vehicle with the same priority as the first vehicle 110 that meets the conditions to satisfy the required SOC of the first vehicle 110. If the control unit 15 determines that there is a matching power supply vehicle (step S10: YES), it performs a matching process with the power supply vehicle (step S11). If the control unit 15 does not determine that there is a matching power supply vehicle (step S10: NO), that is, if it determines that there is no matching power supply vehicle, it proceeds to step S12.

[0043] In step S12, the control unit 15 performs a setting to charge the first vehicle 110 using the grid power P. When there are multiple vehicles being charged using the grid power P in the charging system 100, the control unit 15 performs a setting to supply the power output from the grid power P equally (divided supply) to each vehicle being charged.

[0044] When the first vehicle 110 is matched with another power supply vehicle, the control unit 15 notifies the power supply vehicle of the start of charging (step S13), and starts charging (step S14).

[0045] 8, in process B, the control unit 15 determines whether charging has been forcibly terminated (step S15). When the control unit 15 receives an instruction to terminate charging from the user or when the charging gun is removed, the control unit 15 determines that charging has been forcibly terminated. When the control unit 15 determines that charging has been forcibly terminated (step S15: YES), it notifies the power supply vehicle that charging has been terminated (step S16) and terminates charging (step S17).

[0046] If the control unit 15 does not determine that charging has been forcibly terminated (step S15: NO), it determines whether the first battery 130 of the first vehicle 110 has reached the required SOC (step S18). If the control unit 15 determines that the first battery 130 of the first vehicle 110 has reached the required SOC (step S18: YES), it proceeds to step S16. If the control unit 15 does not determine that the first battery 130 of the first vehicle 110 has reached the required SOC, that is, if it determines that the first battery 130 has not reached the required SOC, it proceeds to step S19.

[0047] In step S19, the control unit 15 determines whether or not the discharging of the power supply vehicle has finished. If the control unit 15 determines that the discharging of the power supply vehicle has finished, the process proceeds to process C (step S06). If the control unit 15 does not determine that the discharging of the power supply vehicle has finished, that is, if the discharging of the power supply vehicle has not finished, the process returns to step S15.

[0048] As shown in FIGS. 7 and 9 , in process A (when the determination unit 14 determines that the SOC is greater than the required SOC (step S05: NO)), the control unit 15 determines that the first vehicle 110 is discharging (step S20). Next, the control unit 15 determines whether or not there is another power supply vehicle in the charging system 100 (step S21). The control unit 15 determines whether or not there is a power supply vehicle among the vehicles connected to the other charging / discharging devices 1 through communication with the other charging / discharging devices 1. When the control unit 15 determines that there is another power supply vehicle (step S21: YES), the control unit 15 sets the priority of the first vehicle 110 to the lowest in the charging system 100 (step S22). When the control unit 15 does not determine that there is another power supply vehicle (step S21: NO), that is, when it determines that there is no other power supply vehicle, the control unit 15 sets the priority of the first vehicle 110 to the highest in the charging system 100 (step S23).

[0049] Next, the control unit 15 determines whether there is a matching charging vehicle (step S24). The control unit 15 acquires the priority and conditions (charge amount) of the charging vehicle among the vehicles currently connected to the multiple charging / discharging devices 1 (1A, 1B, 1C), and checks for matching with a charging vehicle with the same priority. That is, the control unit 15 determines whether there is a charging vehicle with the same priority as the first vehicle 110 that satisfies the required SOC of the first vehicle 110. If the control unit 15 determines that there is a matching charging vehicle (step S24: YES), it performs a matching process with the charging vehicle (step S25). If the control unit 15 does not determine that there is a matching charging vehicle (step S24: NO), that is, if it determines that there is no matching charging vehicle, it returns to step S20.

[0050] When the first vehicle 110 is matched with another charging vehicle, the control unit 15 notifies the charging vehicle to start discharging (step S26), and starts discharging (step S27).

[0051] 10, in process D, the control unit 15 determines whether or not the discharge has been forcibly terminated (step S28). The control unit 15 determines that the discharge has been forcibly terminated when it receives an instruction to terminate the discharge from the user or when the charging gun is unplugged. If the control unit 15 determines that the discharge has been forcibly terminated (step S28: YES), it notifies the charging vehicle that the discharge has been terminated (step S29) and terminates the charging (step S30).

[0052] If the control unit 15 does not determine that the discharge has been forcibly terminated (step S28: NO), the control unit 15 determines whether the second battery 150 of the second vehicle 120 has reached the required SOC (step S31). If the control unit 15 determines that the second battery 150 of the second vehicle 120 has reached the required SOC (step S31: YES), the control unit 15 proceeds to step S29. If the control unit 15 does not determine that the second battery 150 of the second vehicle 120 has reached the required SOC, that is, if the control unit 15 determines that the second battery 150 has not reached the required SOC, the control unit 15 proceeds to step S32.

[0053] In step S32, the control unit 15 determines whether charging of the vehicle to be charged has finished. If the control unit 15 determines that charging of the vehicle to be charged has finished, the process proceeds to process E (step S20). If the control unit 15 does not determine that charging of the vehicle to be charged has finished, that is, if charging of the vehicle to be charged has not finished, the process returns to the process of step S28.

[0054] As described above, in the charging system 100 according to this embodiment, the calculation unit calculates the required SOC of the vehicle based on the planned driving distance. In the controller 5, the determination unit 14 determines whether to charge or discharge the battery based on the SOC and the required SOC. When the conditions of the first vehicle and the conditions of the second vehicle match, the controller 5 controls charging and discharging between the batteries of the two vehicles. In this manner, the controller 5 takes into account the required SOC required for the planned driving distance, and controls charging and discharging between the batteries of the two vehicles when the conditions of the first vehicle and the conditions of the second vehicle match. Therefore, the controller 5 can avoid excessive battery discharge in the vehicle or the battery not being charged with enough power to drive the vehicle to the destination. Therefore, the controller 5 can realize appropriate charging and discharging according to the user's request.

[0055] In the controller 5 according to this embodiment, the calculation unit 13 calculates the required SOC based on the vehicle's electricity consumption and total battery capacity. In this configuration, the required SOC is calculated using the electricity consumption and total battery capacity, so that the required amount of power can be calculated according to the characteristics of the vehicle.

[0056] In the controller 5 according to this embodiment, when there are multiple vehicles, the control unit 15 determines whether the conditions of one vehicle match those of other vehicles, starting with the vehicle with the highest priority, based on the priorities set for each of the multiple vehicles. This configuration allows determining whether the conditions match based on the priorities when there are multiple vehicles. Therefore, it is possible to avoid situations where, for example, another vehicle that requests charging / discharging after a first vehicle is charged / discharged before the first vehicle.

[0057] Although the embodiments of the present invention have been described above, the present invention is not necessarily limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the present invention.

[0058] In the above embodiment, an example has been described in which a planned travel distance is input on the touch panel display 4 and acquired. However, the method of acquiring the planned travel distance is not limited to this. For example, the planned travel distance may be acquired according to a destination. The destination is input on the touch panel display 4, and the planned travel distance is acquired based on the current position information and the position information of the destination.

[0059] In the above embodiment, an example has been described in which a vehicle model is selected on the touch panel display 4, and electricity consumption and total battery capacity are acquired. However, electricity consumption may be acquired by inputting electricity consumption on the touch panel display 4. [Explanation of symbols]

[0060] 1...charging / discharging device (charger), 5...controller (charging control device), 10...communication unit (second acquisition unit), 11...acquisition unit (first acquisition unit), 13...calculation unit, 14...judgment unit, 15...control unit, 110...first vehicle, 120...second vehicle, 130...first battery (first storage battery), 150...second battery (second storage battery).

Claims

1. A charge control device that controls a charger that charges and discharges between a first storage battery of a first vehicle and a second storage battery of a second vehicle, a first acquisition unit that acquires a planned travel distance of the first vehicle; a second acquisition unit that acquires a current remaining capacity of the first storage battery; a calculation unit that calculates a required amount of power required by the first vehicle based on the planned traveling distance acquired by the first acquisition unit; a determination unit that determines whether to charge or discharge the first storage battery based on the remaining capacity acquired by the second acquisition unit and the required amount of power calculated by the calculation unit; A charging control device comprising: a control unit that performs charging and discharging between the first storage battery and the second storage battery when the conditions of the first vehicle and the conditions of the second vehicle based on the judgment result of the judgment unit match.

2. The charge control device according to claim 1 , wherein the calculation unit calculates the required amount of power based on an electricity efficiency and a total battery capacity of the first vehicle.

3. 3. The charging control device according to claim 1, wherein, when there are multiple second vehicles, the control unit determines whether the conditions of the first vehicle match the conditions of the second vehicle, starting with the second vehicle with the highest priority, based on the priorities set for each of the multiple second vehicles.

4. A charge control method for controlling a charger that charges and discharges between a first storage battery of a first vehicle and a second storage battery of a second vehicle, comprising: a first acquisition step of acquiring a planned travel distance of the first vehicle; a second acquisition step of acquiring a current remaining capacity of the first storage battery; a calculation step of calculating a required amount of power required by the first vehicle based on the planned traveling distance acquired in the first acquisition step; a determination step of determining whether to charge or discharge the first storage battery based on the remaining capacity acquired in the second acquisition step and the required amount of power calculated in the calculation step; a control step of performing charging and discharging between the first storage battery and the second storage battery when the conditions of the first vehicle and the conditions of the second vehicle based on the judgment result in the judgment step match.

5. A charge control program for controlling a charger that charges and discharges between a first storage battery of a first vehicle and a second storage battery of a second vehicle, a first acquisition step of acquiring a planned travel distance of the first vehicle; a second acquisition step of acquiring a current remaining capacity of the first storage battery; a calculation step of calculating a required amount of power required by the first vehicle based on the planned traveling distance acquired in the first acquisition step; a determination step of determining whether to charge or discharge the first storage battery based on the remaining capacity acquired in the second acquisition step and the required amount of power calculated in the calculation step; a control step of performing charging and discharging between the first storage battery and the second storage battery when the conditions of the first vehicle and the conditions of the second vehicle based on the judgment result in the judgment step match.

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