JP2014207814A - Power supply device and control method for power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply device capable of preventing the power generated by a solar battery during a period when an automobile is not electrically connected to the outside from being wasted by not being stored in a battery, and capable of utilizing the power of the solar battery more efficiently.SOLUTION: A power supply device is mounted on a movable body 10 and includes; a solar battery 11 that generates power by receiving light; a battery 12 for storing the power generated by the solar battery 11; generated power estimation means 15 for acquiring a generated power estimation value which is an estimation value of the power generated by the solar battery 11 during a non-connection period when the movable body 10 is not electrically connected to the outside; and electric discharge control means 14 for discharging the power in the amount determined based on the generated power estimation value to the outside from the battery 12 before the non-connection period in advance, and securing vacant capacity in the battery 12 for storing the power generated by the solar battery 11 during the non-connection period.

Description

  The present invention relates to a power supply device mounted on a moving body and a control method for the power supply device.

  A battery for driving a motor of an electric vehicle (EV) and a plug-in hybrid electric vehicle (PHEV) is connected to an outlet of a house and charged by a system power source. On the other hand, there is an automobile equipped with a solar cell and capable of charging the battery with power generated by the solar cell.

  Regarding a vehicle equipped with a solar cell, the following Patent Document 1 discloses a battery that predicts the amount of power generated by a solar cell while the vehicle is parked at a destination and secures the predicted amount of power generated at the end of parking. A technique is disclosed in which the target charge amount at the start of parking is subtracted from the remaining amount. According to this technique, the fuel consumption of the vehicle can be improved by suppressing the power generation amount of the generator driven by the engine of the vehicle heading to the destination based on the target charge amount at the start of parking.

JP 2008-172959 A

  However, the above technique is a technique related to a closed system of an automobile, and an open system in which the automobile is connected to an outlet of a house is not considered. For this reason, in said technique, it cannot be said that the electric power which a solar cell produces | generates can be utilized sufficiently efficiently.

  If the parked car is connected to a residential outlet, the power generated by the solar cell can be sent to the grid power source and sold to the power company. On the other hand, if the car is not connected to the outlet of the house, the power generated by the solar cell cannot be sold, and if the battery is fully charged, the power generated by the solar cell cannot be stored. There is a problem that power is wasted.

  The present invention has been made to solve the above-described problems. Accordingly, an object of the present invention is to prevent the power generated by the solar cell during the period in which the automobile is electrically disconnected from the outside from being wasted without being stored in the battery. It is providing the power supply device which can utilize more efficiently, and the control method of a power supply device.

  The above object of the present invention is achieved by the following means.

  The power supply device of the present invention is a power supply device mounted on a moving body, and includes a solar cell, a battery, a generated power prediction unit, and a discharge control unit. The solar cell generates power by receiving light. The battery stores electric power generated by the solar cell. The generated power prediction means obtains a predicted generated power value that is a predicted value of power generated by the solar cell during a non-connection period in which the mobile body is electrically disconnected from the outside. The discharge control means discharges in advance an amount of electric power determined based on the generated power generation prediction value from the battery before the non-connection period, and generates electric power generated by the solar cell during the non-connection period. An empty capacity for storing electricity is secured in the battery.

  The method for controlling a power supply device according to the present invention is a method for controlling a power supply device mounted on a moving body, and includes steps (a) and (b). In the step (a), a predicted generated power value, which is a predicted value of power generated by the solar cell by receiving light during a non-connection period in which the moving body is electrically disconnected from the outside, is obtained. It is done. In the step (b), an amount of power determined based on the predicted power generation value is discharged in advance from the battery before the non-connection period, and is generated by the solar cell during the non-connection period. Is reserved in the battery.

  According to the present invention, since a free capacity for storing electric power generated by the solar cell during a non-connection period in which the moving body is electrically disconnected from the outside is reserved in the battery in advance, the solar cell Is prevented from being wasted without being stored in the battery. That is, the electric power generated by the solar cell can be used more efficiently.

1 is a block diagram illustrating a schematic configuration of an electric vehicle on which a power supply device according to a first embodiment of the present invention is mounted. It is a functional block diagram of power supply ECU shown in FIG. It is a flowchart which shows the procedure of the power supply control process which an electric vehicle performs. It is a figure for demonstrating a power supply control process. It is a flowchart which shows the procedure of the power supply control process which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows the procedure of the power supply control process which concerns on the 3rd Embodiment of this invention. It is a flowchart which shows the procedure of the power supply control process which concerns on the 4th Embodiment of this invention. It is a flowchart which shows the procedure of the power supply control process which concerns on the 5th Embodiment of this invention. It is a flowchart which shows the procedure of the power supply control process which concerns on the 6th Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol was used for the same member in the figure.

(First embodiment)
FIG. 1 is a block diagram showing a schematic configuration of an electric vehicle 10 on which a power supply device according to a first embodiment of the present invention is mounted.

  As shown in FIG. 1, the electric vehicle 10 includes a solar cell 11, a battery 12, a load 13, a power conditioner 14, and a power supply ECU (Electronic Control Unit) 15. Further, the electric vehicle 10 is connected to the grid power source 20.

  The solar cell 11 generates electric power by receiving light. If solar radiation is ensured, the solar cell 11 will generate electric power even during a period when the electric vehicle 10 is stopped.

  The battery 12 stores the electric power generated by the solar cell 11. The battery 12 is, for example, a lithium ion secondary battery, and is charged by receiving power from the solar battery 11 or the grid power supply 20. The battery 12 supplies power to the load 13 or the grid power source 20.

  The load 13 consumes power supplied from the solar cell 11 or the battery 12. The load 13 includes a motor of the electric vehicle 10, an air conditioner, a lighting device, and various electronic devices. The load 13 includes a generator and can supply power to the battery 12.

  The power conditioner 14 controls the exchange of power among the solar cell 11, the battery 12, the load 13, and the grid power supply 20. Moreover, the power conditioner 14 discharges electric power from the battery 12 to the grid power supply 20 as a discharge control means.

  The power supply ECU 15 performs control of the power conditioner 14 and various arithmetic processes. The power supply ECU 15 is mainly configured by a central processing unit (CPU), a storage device (SRAM, EEPROM), and an input / output interface, and performs control of the power conditioner 14 and various arithmetic processes according to a program. A detailed description of the power supply ECU 15 will be described later.

  The grid power supply 20 supplies power to the battery 12. The grid power supply 20 is connected to a power transmission network supplied by an electric power company, and supplies power to the battery 12 for charging. Moreover, the grid power supply 20 can send the electric power supplied from the solar cell 11 and the battery 12 to an electric power company for sale. The grid power supply 20 includes a non-contact power supply device that supplies electric power to the electric vehicle 10 in a non-contact manner.

  FIG. 2 is a functional block diagram of the power supply ECU 15. As shown in FIG. 2, the power supply ECU 15 includes a prediction unit 30 and a calculation unit 40.

  The prediction unit 30 includes a data storage unit 31, a weather information acquisition unit 32, a movement information acquisition unit 33, a power generation amount calculation unit 34, a power consumption monitor unit 35, and a consumption amount calculation unit 36.

  The data storage unit 31 stores past solar radiation amount data, power generation amount data, position information of the electric vehicle 10, and the like.

  The weather information acquisition unit 32 acquires weather forecast information. The weather information acquisition unit 32 acquires, for example, weather forecast information together with road traffic information at regular time intervals. The weather forecast information includes information such as temperature, amount of solar radiation, and sunshine duration.

  The movement information acquisition unit 33 acquires movement schedule information of the electric vehicle 10. The movement information acquisition part 33 communicates with a user's portable terminal, for example, and acquires the movement schedule information of the electric vehicle 10. Alternatively, the movement information acquisition unit 33 acquires movement schedule information that is directly input to the electric vehicle 10 by the user. The travel schedule information includes schedule information of a user who can grasp the travel distance of the electric vehicle 10.

  The power generation amount calculation unit 34 calculates a generated power predicted value that is a predicted value of power generated by the solar cell 11 as a generated power prediction unit. The power generation amount calculation unit 34 is based on the data stored in the data storage unit 31, weather forecast information, and travel schedule information, and the solar cell 11 during a non-connection period in which the electric vehicle 10 is not connected to the grid power supply 20. The predicted power generation value is calculated.

  The electricity cost monitor unit 35 calculates the electricity cost (travel distance per unit power) of the electric vehicle 10. The electricity cost monitor unit 35 continuously monitors the power consumption and travel distance of the electric vehicle 10 and calculates electricity costs.

  The consumption calculator 36 calculates a power consumption predicted value that is a predicted value of power consumed by the electric vehicle 10 as power consumption prediction means. The consumption calculator 36 calculates a predicted power consumption value of the electric vehicle 10 during a non-connection period in which the electric vehicle 10 is not connected to the grid power supply 20 based on the movement schedule information and the power consumption information.

  The calculation unit 40 includes a battery remaining amount monitor unit 41 and a discharge amount calculation unit 42.

  The battery remaining amount monitor part 41 detects the charge amount of the battery 12 as a detection means. The battery remaining amount monitor unit 41 continuously monitors the electric power stored in the battery 12 and detects the amount of charge of the battery 12.

  The discharge amount calculation unit 42 calculates the amount of power that the battery 12 can discharge to the outside in advance. The discharge amount calculation unit 42 is connected to the grid power source 20 based on the charge amount of the battery 12, the predicted power generation value of the solar battery 11, and the predicted power consumption value of the electric vehicle 10 as a discharge amount calculation unit. During this time, the amount of power that can be discharged by the battery 12 is calculated.

  The electric vehicle 10 configured as described above predicts, for example, the amount of power generated by the solar cell 11 the night before going to work, discharges the power of the battery 12 to the outside in advance, and the next day, at the company parking lot or the like. The battery 12 has a free capacity for storing all or part of the electric power generated by the battery 11. Hereinafter, with reference to FIG. 3 and FIG. 4, the control method of the power supply device which concerns on this embodiment is demonstrated in detail.

  FIG. 3 is a flowchart illustrating a procedure of power control processing executed by the electric vehicle 10. When the power control process is executed, the electric vehicle 10 is connected to, for example, a residential outlet (that is, the grid power supply 20).

  First, the power supply ECU 15 checks the remaining battery level (step S101). More specifically, the power supply ECU 15 confirms the current charge amount of the battery 12 from the information of the battery remaining amount monitor unit 41.

  Next, the power supply ECU 15 predicts the power consumption of the electric vehicle 10 (step S102). More specifically, the power supply ECU 15 calculates a predicted power consumption value that is a predicted value of the power consumed by the electric vehicle 10 based on the scheduled movement information of the electric vehicle 10 on the next day. For example, when the electric vehicle 10 is scheduled to reciprocate between the house and the company the next day, the power supply ECU 15 calculates the predicted power consumption value of the electric vehicle 10 by dividing the round-trip distance between the house and the company by the electricity cost. Note that the predicted power consumption value of the electric vehicle 10 can be corrected based on the topography (slope) of the moving route, the presence or absence of traffic jams, past results, and the like.

  Next, power supply ECU15 estimates the electric power generation amount of the solar cell 11 (step S103). Specifically, the power supply ECU 15 calculates a power generation predicted value that is a predicted value of the power generation amount of the solar battery 11 based on the weather forecast information of the next day. More specifically, the power supply ECU 15 first predicts the amount of solar radiation from the weather forecast information of the next day. Then, the power supply ECU 15 calculates a predicted generated power value from the solar radiation amount based on past data on the solar radiation amount and the power generation amount. Note that the predicted power generation value of the solar battery 11 can be corrected based on the temperature of the next day, the past performance, and the like. Unlike the present embodiment, the predicted power generation value may be calculated as the product of the power generation capacity of the solar cell 11 and the amount of solar radiation.

  Next, the power supply ECU 15 determines whether or not the sum of the remaining battery amount and the power generation amount is larger than the power consumption amount (step S104). More specifically, the power supply ECU 15 first calculates the sum of the charged amount of the battery 12 confirmed in the process shown in step S101 and the predicted generated power calculated in the process shown in step S103, as power comparison means. . Then, the power supply ECU 15 compares the sum of the charged amount of the battery 12 and the predicted generated power value with the predicted power consumption value calculated in the process shown in step S102.

  When determining that the sum of the remaining battery amount and the power generation amount is smaller than the power consumption amount (step S104: NO), the power supply ECU 15 ends the process. In this embodiment, power supply ECU15 complete | finishes a process on the assumption that the surplus electric power which can be discharged previously is not accumulate | stored in the battery 12. FIG.

  On the other hand, when it is determined that the sum of the remaining battery amount and the power generation amount is larger than the power consumption amount (step S104: YES), the power supply ECU 15 calculates the discharge amount (step S105). More specifically, the power supply ECU 15 is connected before the disconnection period so that the electric power generated by the solar cell 11 is stored in the battery 12 during the disconnection period when the electric vehicle 10 is not connected to the grid power supply 20. The amount of power that can be discharged from the battery 12 to the outside in advance is calculated. Here, the amount of electric power that can be discharged is, for example, a value obtained by subtracting the predicted power consumption value from the sum of the charged amount of the battery 12 and the predicted generated power value, and is the minimum power that the electric vehicle 10 does not run out of power. This is the power excluding.

  Next, power supply ECU15 starts discharge (step S106). More specifically, the power supply ECU 15 operates the power conditioner 14 to discharge the power stored in the battery 12 to the grid power supply 20. When the power stored in the battery 12 is discharged, the battery 12 has a free capacity for storing the power generated by the solar cell 11 during the above-described non-connection period. Further, the electric power discharged from the battery 12 is sold to an electric power company through the grid power source 20.

  Next, the power supply ECU 15 determines whether or not the discharge amount has reached the discharge set value (step S107). More specifically, power supply ECU 15 determines whether or not the electric power discharged from battery 12 has reached the amount of electric power that can be discharged calculated in the process shown in step S105.

  When determining that the discharge amount has not reached the discharge set value (step S107: NO), the power supply ECU 15 stands by until the discharge amount reaches the discharge set value.

  On the other hand, when it is determined that the discharge amount has reached the discharge set value (step S107: YES), the power supply ECU 15 ends the process. More specifically, the power supply ECU 15 operates the power conditioner 14 and stops discharging from the battery 12 to the grid power supply 20.

  As described above, according to the process of the flowchart shown in FIG. 3, the charge amount of the battery 12, the predicted power consumption value of the electric vehicle 10, and the predicted generated power value of the solar cell 11 are obtained. Is compared with the predicted power consumption. When the sum of the charge amount and the predicted power generation value is larger than the power consumption prediction value, the amount of power that can be discharged from the battery 12 is calculated, and the dischargeable amount of power is discharged from the battery 12 to the grid power source 20. Is done. The electric power discharged from the battery 12 to the grid power supply 20 is sold to an electric power company.

  According to such a configuration, an empty capacity for storing electric power generated by the solar cell 11 during a non-connection period in which the electric vehicle 10 is not connected to the grid power supply 20 is secured in the battery 12 in advance. As a result, the electric power generated by the solar cell 11 is not stored in the battery 12 during a non-connection period in which the electric vehicle 10 is not connected to the grid power source 20 (for example, a period in which the electric vehicle 10 is parked in a company parking lot). It is prevented from being wasted.

  Next, the power supply control process of the present embodiment will be described in detail with reference to FIG.

  As shown in FIG. 4, in the power supply control process of the present embodiment, past data on the amount of solar radiation and the amount of power generation is stored in advance in the electric vehicle 10 (see FIG. 4A).

  Based on the next day's schedule and weather forecast, the predicted power generation amount (power generation predicted value) and the predicted consumption amount (power consumption prediction value) for the next day are calculated based on the next day's schedule and weather forecast. Is done. Furthermore, based on the predicted power generation amount, the predicted consumption amount, and the charge amount of the battery 12, the available capacity of the battery 12 to be secured (that is, the amount of electric power that can be discharged) is calculated (see FIG. 4B). .

  Here, the amount of electric power that can be discharged can be displayed on the portable terminal of the user of the electric vehicle 10 to inquire the user whether or not to discharge (see FIG. 4C).

  When it is determined that the user does not discharge in response to the inquiry about whether or not to discharge, the power is not discharged at night, and the remaining amount of the battery 12 is maintained as it is (see FIG. 4D).

  On the other hand, in response to an inquiry as to whether or not discharge is possible, when the user determines to discharge, electric power is discharged at night to secure a free capacity in the battery 12 (see FIG. 4E). At this time, the electric power discharged from the battery 12 is sold to an electric power company.

  If the battery 12 has enough free space, the power generated by the solar cell 11 is stored in the battery 12 in the company parking lot the next day (see FIG. 4F). According to such a configuration, it is possible to prevent the electric power generated by the solar battery 11 in the company parking lot from being wasted without being stored in the battery 12.

  Unlike the above-described embodiment, the user may be inquired whether or not to discharge before starting the power control process. Further, for example, the above processing may be executed only when the next day is a work day. In this case, the user may be inquired whether the next day is a work day or may be automatically processed according to the day of the week.

  Further, when another user uses the electric vehicle 10 while discharging from the battery 12, a warning can be given to the other user, or the power control process can be performed again after the other user has used. In addition, the electric vehicle 10 is preferably linked to a user's scheduler (such as a portable terminal).

  As described above, the described embodiment has the following effects.

  (A) In order to discharge the power of the battery 12 to the grid power source 20 in advance to secure the free capacity of the battery 12, the power generated by the solar cell 11 during the period when the battery 12 is not connected to the grid power source 20 is It is prevented that the power is not wasted without being stored. That is, the electric power generated by the solar cell 11 can be used more efficiently.

  (B) Since the amount of electric power that can be discharged is calculated based on the charge amount of the battery 12, the predicted power generation value of the solar cell 11, and the predicted power consumption value of the electric vehicle 10, the required minimum power The surplus power can be discharged from the battery 12, leaving only

  (C) Since the discharge is performed when the sum of the charged amount of the battery 12 and the predicted power generation value of the solar cell 11 is larger than the predicted power consumption value of the electric vehicle 10, it is accurately determined whether or not the discharge should be performed. can do.

(Second Embodiment)
When the weather forecast information is updated during the discharge of power from the battery 12, the amount of power that can be discharged may be recalculated based on the updated weather forecast information.

  FIG. 5 is a flowchart showing a procedure of power control processing according to the second embodiment of the present invention. Except for the point that the weather forecast information is updated, the configuration of the electric vehicle 10 according to the present embodiment is the same as the configuration according to the first embodiment, and thus detailed description thereof is omitted.

  Since the processing shown in steps S201 to S206 is the same as the processing shown in steps S101 to S106 in FIG. 3, detailed description thereof is omitted.

  After the discharge from the battery 12 is started in the process shown in step S206, the power supply ECU 15 determines whether or not the power generation amount prediction information has been updated (step S207). For example, when the weather information acquisition unit 32 acquires new weather forecast information, the power supply ECU 15 determines that the power generation amount prediction information has been updated.

  When determining that the power generation amount prediction information has not been updated (step S207: NO), the power supply ECU 15 proceeds to the process of step S210. Since the process shown in step S210 is the same as the process shown in step S107 of FIG. 3, detailed description thereof is omitted.

  On the other hand, when it is determined in the process shown in step S207 that the power generation amount prediction information has been updated (step S207: YES), the power supply ECU 15 predicts the power generation amount of the solar cell 11 (step S208). More specifically, the power supply ECU 15 newly calculates a predicted power generation value of the solar cell 11 based on the updated weather forecast information.

  Next, the power supply ECU 15 determines whether or not the difference between the new and old power generation amount prediction values is smaller than the set value (step S209). More specifically, the power supply ECU 15, as the change amount comparison means, determines that the difference between the generated power predicted value calculated in the process shown in step S203 and the generated power predicted value calculated in the process shown in step S208 is greater than a predetermined threshold. It is determined whether or not it is too small. Here, the threshold value is a value for determining whether or not to recalculate the amount of power that can be discharged, and is set as appropriate.

  When determining that the difference between the new and old power generation amount prediction values is smaller than the set value (step S209: YES), the power supply ECU 15 proceeds to the process of step S210, assuming that it is not necessary to recalculate the amount of electric power that can be discharged. .

  On the other hand, when it is determined that the difference between the new and old power generation amount prediction values is larger than the set value (step S209: NO), the power supply ECU 15 returns to the process of step S201. As a result, the amount of power that can be discharged is recalculated, and the recalculated amount of power is discharged from the battery 12.

  As described above, according to the process of the flowchart shown in FIG. 5, when the weather forecast information is updated during the discharge of power from the battery 12, the generated power predicted value is newly calculated based on the updated weather forecast information. Calculated. When the difference between the predicted power generation values of old and new is larger than a predetermined threshold value, the amount of power that can be discharged is recalculated based on the newly calculated power generation prediction value, and discharging is performed. According to such a configuration, the accuracy of predicting the amount of power that can be discharged is improved.

  As described above, the present embodiment described has the following effects in addition to the effects of the first embodiment.

  (D) When the weather forecast information is updated, a predicted generated power value is newly calculated based on the updated weather forecast information, and the amount of dischargeable power is recalculated. Prediction accuracy is improved.

  (E) If the difference between the predicted power generation values of the old and new is larger than the threshold value, the process is infinite loop when the weather forecast information is frequently updated at short time intervals to recalculate the amount of power that can be discharged. Can be prevented.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG. In the present embodiment, the movement schedule is changed during the discharge of the electric power from the battery 12.

  FIG. 6 is a flowchart showing the procedure of the power supply control process according to the third embodiment of the present invention. Except for the point that the schedule of movement is changed, the configuration of the electric vehicle 10 according to the present embodiment is the same as the configuration according to the first embodiment, and thus detailed description thereof is omitted.

  Since the processing shown in steps S301 to S306 is the same as the processing shown in steps S101 to S106 in FIG. 3, detailed description thereof is omitted.

  After the discharge from the battery 12 is started in the process shown in step S306, the power supply ECU 15 determines whether or not the action schedule has been changed (step S307). For example, when the movement information acquisition unit 33 acquires new movement schedule information, the power supply ECU 15 determines that the action schedule has been changed.

  When determining that the action schedule has been changed (step S307: YES), the power supply ECU 15 returns to the process of step S301. As a result, the amount of electric power that can be discharged is recalculated based on the changed moving schedule information, and discharging is performed.

  On the other hand, when determining that the action schedule has not been changed (step S307: NO), the power supply ECU 15 proceeds to the process of step S308. Since the process shown in step S308 is the same as the process shown in step S107 of FIG. 3, detailed description thereof is omitted.

  As described above, according to the process of the flowchart shown in FIG. 6, when the movement schedule information is changed, the amount of electric power that can be discharged is recalculated based on the changed movement schedule information, and discharging is performed. According to such a structure, the freedom degree of a user's action schedule increases.

  As described above, the described embodiment has the following effects in addition to the effects of the first and second embodiments.

  (F) When the movement schedule information is changed, the amount of electric power that can be discharged is recalculated based on the changed movement schedule information, so the degree of freedom of the user's action schedule increases.

(Fourth embodiment)
In the present embodiment, the user changes the discharge amount.

  FIG. 7 is a flowchart showing a procedure of power supply control processing according to the fourth embodiment of the present invention. Except for the point that the discharge amount is changed, the configuration of the electric vehicle 10 according to the present embodiment is the same as the configuration according to the first embodiment, and thus detailed description thereof is omitted.

  Since the processing shown in steps S401 to S405 is the same as the processing shown in steps S101 to S105 in FIG. 3, detailed description thereof is omitted.

  After the discharge amount is calculated in the process shown in step S405, the power supply ECU 15 determines whether or not the discharge amount has been changed (step S406). For example, when a desired discharge amount is input by the user of the electric vehicle 10, the power supply ECU 15 determines that the discharge amount has been changed.

  When determining that the discharge amount has not been changed (step S406: NO), the power supply ECU 15 proceeds to the process of step S409. Since the processing shown in steps S409 to S410 is the same as the processing shown in steps S106 to S107 in FIG. 3, detailed description thereof is omitted.

  On the other hand, when it is determined in the process shown in step S406 that the discharge amount has been changed (step S406: YES), the power supply ECU 15 sets a new discharge amount (step S407). More specifically, the power supply ECU 15 newly sets the amount of discharge recognized as changed in the process shown in step S406 as the amount of electric power that can be discharged.

  Next, the power supply ECU 15 determines whether or not the new discharge amount is smaller than the value obtained by subtracting the power consumption amount from the sum of the remaining battery amount and the power generation amount (step S408). More specifically, the power supply ECU 15 first calculates, as a discharge amount comparison unit, a value obtained by subtracting the predicted power consumption value from the sum of the charged amount of the battery 12 and the predicted generated power value as a reference value. Then, power supply ECU 15 determines whether or not the discharge amount set in the process shown in step S407 is smaller than the reference value.

  When it is determined that the new discharge amount is smaller than the value obtained by subtracting the power consumption from the sum of the battery remaining amount and the power generation amount (step S408: YES), the power supply ECU 15 starts discharging (step S409). Then, power supply ECU 15 determines whether or not the discharge amount has reached the discharge set value (step S410). More specifically, the power supply ECU 15 determines whether or not the power discharged from the battery 12 has reached the discharge amount newly set in the process shown in step S407. Since the process shown in step S410 is the same as the process shown in step S107 of FIG. 3, detailed description thereof is omitted.

  On the other hand, in the process shown in step S408, when it is determined that the new discharge amount is larger than the value obtained by subtracting the power consumption from the sum of the charge amount and the power generation amount of the battery 12 (step S408: NO), the power supply ECU 15 Discharging is started (step S411). Then, the power supply ECU 15 determines whether or not the discharge amount has reached the original discharge set value (step S412). More specifically, power supply ECU 15 determines whether or not the power discharged from battery 12 has reached the amount of discharge calculated in the process shown in step S405. Since the process shown in step S412 is the same as the process shown in step S107 of FIG. 3, detailed description thereof is omitted.

  As described above, according to the process of the flowchart shown in FIG. 7, when the discharge amount is changed, it is determined whether or not the changed discharge amount can be discharged. Then, when it is determined that the changed discharge amount can be discharged, the changed discharge amount is discharged. On the other hand, when it is determined that the discharge amount after the change is not possible, the discharge amount before the change is discharged. According to such a configuration, the user can appropriately set the discharge amount in accordance with his / her own idea.

  As described above, the described embodiment has the following effects in addition to the effects of the first to third embodiments.

  (G) When the discharge amount is changed, the discharge is performed with the changed discharge amount, so that the user can appropriately set the discharge amount in accordance with his / her idea.

(Fifth embodiment)
In the present embodiment, the discharge start time is adjusted so that the discharge of the battery 12 is completed immediately before the electric vehicle 10 is used.

  FIG. 8 is a flowchart showing a procedure of power control processing according to the fifth embodiment of the present invention. Except for adjusting the discharge start time, the configuration of the electric vehicle 10 according to the present embodiment is the same as the configuration according to the first embodiment, and thus detailed description thereof is omitted.

  Since the processing shown in steps S501 to S505 is the same as the processing shown in steps S101 to S105 in FIG. 3, detailed description thereof is omitted.

  After the discharge amount is calculated in the process shown in step S505, the power supply ECU 15 calculates a discharge start time that matches the scheduled use time (step S506). More specifically, the power supply ECU 15 first predicts the time required for discharge from the discharge amount calculated in the process shown in step S505 as the discharge start time calculation means. Then, the power supply ECU 15 calculates the discharge start time by calculating backward from the use start time of the electric vehicle 10.

  Next, the power supply ECU 15 determines whether or not the current time is the discharge start time (step S507). More specifically, power supply ECU 15 determines whether or not the current time is the discharge start time calculated in the process shown in step S506.

  When determining that the current time is not the discharge start time (step S507: NO), the power supply ECU 15 waits until the current time becomes the discharge start time.

  On the other hand, when determining that the current time is the discharge start time (step S507: YES), the power supply ECU 15 starts the discharge (step S508). Since the processing shown in steps S508 to S509 is the same as the processing shown in steps S106 to S107 in FIG. 3, detailed description thereof is omitted.

  As described above, according to the process of the flowchart shown in FIG. 8, the discharge start time is calculated so that the discharge is completed immediately before the electric vehicle 10 is used, and the discharge is started at the discharge start time. According to such a structure, it can respond to the sudden change of a user's action plan.

  As described above, the present embodiment described has the following effects in addition to the effects of the first to fourth embodiments.

  (H) Since the discharge is completed immediately before using the electric vehicle 10, it is possible to cope with a sudden change in the user's action schedule.

(Sixth embodiment)
The present embodiment is an embodiment in which power is discharged in a time zone in which the purchase price of power is the most expensive.

  FIG. 9 is a flowchart showing a procedure of power control processing according to the sixth embodiment of the present invention. Except for adjusting the discharge time zone, the configuration of the electric vehicle 10 according to the present embodiment is the same as the configuration according to the first embodiment, and thus detailed description thereof is omitted.

  Since the processing shown in steps S601 to S605 is the same as the processing shown in steps S101 to S105 in FIG. 3, detailed description thereof is omitted.

  After the discharge amount is calculated in the process shown in step S605, the power supply ECU 15 calculates a discharge start time that matches the most expensive discharge consideration before the scheduled use time (step S606). More specifically, the power supply ECU 15 first obtains a time zone in which the purchase price of electric power by the electric company is the most expensive as the purchase time calculation means. Then, the power supply ECU 15 calculates the discharge start time so that the power is discharged from the battery 12 in the time zone in which the purchase price is the most expensive.

  Next, the power supply ECU 15 determines whether or not the current time is the discharge start time (step S607). More specifically, power supply ECU 15 determines whether or not the current time is the discharge start time calculated in the process shown in step S606.

  When determining that the current time is not the discharge start time (step S607: NO), the power supply ECU 15 waits until the current time becomes the discharge start time.

  On the other hand, when determining that the current time is the discharge start time (step S607: YES), the power supply ECU 15 starts the discharge (step S608). Since the processing shown in steps S608 to S609 is the same as the processing shown in steps S106 to S107 in FIG. 3, detailed description thereof is omitted.

  As described above, according to the processing of the flowchart shown in FIG. 9, the discharge start time is calculated so that power is discharged from the electric vehicle 10 in a time zone in which the purchase price of power is the most expensive, and discharge is performed at the discharge start time. Be started. According to such a configuration, power can be sold at a more expensive price.

  In addition, when electric power cannot be discharged in the time zone when the purchase price is the most expensive, for example, the electric power may be discharged to the storage battery for housing and sold from the storage battery in the time zone where the purchase price is the most expensive.

  As described above, the present embodiment described has the following effects in addition to the effects of the first to fourth embodiments.

  (I) Since electric discharge is performed during a time period when the purchase price is the most expensive, electric power can be sold at a more expensive price.

  As described above, in the first to sixth embodiments described, the power supply device and the control method for the power supply device of the present invention have been described. However, it goes without saying that the present invention can be appropriately added, modified, and omitted by those skilled in the art within the scope of the technical idea.

  For example, in the first to sixth embodiments described above, the predicted power consumption value is calculated by dividing the travel distance of the electric vehicle 10 by the power consumption. However, the predicted power consumption value may be obtained based on past data. For example, a predicted power consumption value for the next day's commuting may be obtained based on power consumption data for the same commuting one year ago. Alternatively, a value set by the user may be applied to the predicted power consumption value.

  In the first to sixth embodiments described above, the amount of power that can be discharged from the battery 12 is calculated based on the charge amount of the battery 12, the predicted generated power value, and the predicted power consumption value. However, the amount of power discharged from the battery 12 may be obtained based only on the predicted generated power value regardless of the charged amount of the battery 12 and the predicted power consumption value. Specifically, the amount of power discharged from the battery 12 may be determined as a value of a predetermined ratio with respect to the predicted generated power value (for example, a value of 30% of the predicted generated power value).

  In the first to sixth embodiments described above, the case where the power discharged from the battery 12 is sent to the grid power supply 20 has been described as an example. However, the electric power discharged from the battery 12 may be stored in a residential storage battery, or may be immediately consumed in the house.

  Further, in the first to sixth embodiments described above, the case where the power supply device of the present invention is mounted on the electric vehicle 10 has been described as an example. However, the mobile body on which the power supply device of the present invention is mounted is not limited to an electric vehicle, and can be mounted on a plug-in hybrid electric vehicle. Furthermore, the power supply device of the present invention can be mounted on a tractor or an aircraft.

  It is also possible to execute processing that appropriately combines the processing of the first to sixth embodiments described above.

10 Electric vehicle (mobile),
11 Solar cell,
12 battery,
13 load,
14 power conditioner (discharge control means),
15 power supply ECU (power comparison means, change amount comparison means, discharge amount comparison means, discharge start time calculation means, purchase time calculation means),
20 grid power,
31 data storage unit,
32 Weather information acquisition unit,
33 movement information acquisition unit,
34 Power generation amount calculation unit (generated power prediction means),
35 Electricity monitor section,
36 consumption calculation unit (power consumption prediction means),
41 battery remaining amount monitor (detection means),
42 discharge amount calculation unit (discharge amount calculation means).

Claims (18)

A power supply device mounted on a moving body,
A solar cell that generates power by receiving light; and
A battery for storing electric power generated by the solar cell;
Generated power prediction means for obtaining a generated power predicted value that is a predicted value of power generated by the solar cell during a non-connection period in which the mobile body is electrically disconnected from the outside;
A free capacity for storing the power generated by the solar cell during the non-connection period by discharging in advance an amount of electric power determined based on the predicted power generation value from the battery before the non-connection period. Discharge control means for securing to the battery,
A power supply device comprising: Detecting means for detecting a charge amount of the battery;
Power consumption prediction means for obtaining a power consumption predicted value that is a predicted value of power consumed by the mobile during the non-connection period;
A discharge amount calculating means for obtaining an amount of power that can be discharged from the battery before the non-connection period based on the charge amount, the predicted power consumption value, and the predicted generated power value;
The power supply apparatus according to claim 1, wherein the discharge control unit discharges the dischargeable amount of power from the battery to the outside. A power comparison means for comparing the sum of the charge amount and the predicted power generation value with the predicted power consumption value;
The discharge control unit discharges the dischargeable amount of power from the battery to the outside when the sum of the charge amount and the predicted generated power value is larger than the predicted power consumption value. Item 3. The power supply device according to Item 2. The generated power prediction means obtains the predicted generated power based on information on weather during the disconnected period,
When the information on the weather is updated after the discharge from the battery to the outside is started, the generated power prediction means newly obtains the generated power predicted value based on the updated information on the weather ,
4. The power supply device according to claim 2, wherein the discharge amount calculation unit newly calculates the amount of electric power that can be discharged based on the newly generated predicted power generation value. 5. A change amount comparing means for comparing a difference between the newly generated generated power predicted value and the original generated power predicted value with a predetermined threshold;
When the difference between the newly determined generated power predicted value and the original generated power predicted value is larger than the threshold, the discharge amount calculating means newly determines the amount of power that can be discharged. The power supply device according to claim 4. The power consumption prediction means obtains the predicted power consumption value based on information related to the movement schedule of the mobile body during the non-connection period,
When the information on the movement schedule is changed after the discharge from the battery to the outside is started, the power consumption prediction unit newly sets the power consumption prediction value based on the information on the movement schedule after the change. Seeking
The said discharge amount calculation means calculates | requires newly the quantity of the electric power which can be discharged based on the newly calculated | required power consumption predicted value, The any one of Claims 2-5 characterized by the above-mentioned. Power supply. When the amount of electric power that can be discharged is changed, a reference value that is a value obtained by subtracting the predicted power consumption value from the sum of the charged amount and the predicted generated power value is used as the dischargeable electric power after the change. A discharge amount comparison means for comparing with the amount;
When the amount of the dischargeable power after the change is larger than the reference value, the discharge control unit discharges the dischargeable amount of power before the change from the battery, and the dischargeable power after the change The discharge control means discharges the electric power of the dischargeable amount after the change from the battery when the amount of the battery is smaller than the reference value. Power supply. A discharge start time calculating means for calculating a discharge start time so that the discharge of electric power from the battery is completed immediately before the start of use of the mobile body;
The power supply apparatus according to claim 1, wherein the discharge control unit starts discharging from the battery at the discharge start time. Purchase time calculation means for obtaining a time when the purchase price of the electric power discharged from the battery is most expensive;
The power supply apparatus according to any one of claims 1 to 7, wherein the discharge control means discharges electric power from the battery at a time when the purchase price is the most expensive. A method of controlling a power supply device mounted on a moving body,
Obtaining a predicted generated power value that is a predicted value of power generated by the solar cell by receiving light during a non-connection period in which the mobile body is electrically disconnected from the outside;
A free capacity for storing the power generated by the solar cell during the non-connection period by discharging in advance an amount of electric power determined based on the predicted power generation value from the battery before the non-connection period. Securing to the battery (b);
A control method for a power supply apparatus, comprising: A step (c) of detecting a charge amount of the battery and obtaining a predicted power consumption value which is a predicted value of power consumed by the mobile body during the non-connection period;
A step (d) of obtaining an amount of power that can be discharged from the battery before the non-connection period based on the charge amount, the predicted power consumption value, and the predicted power generation value;
11. The method of controlling a power supply device according to claim 10, wherein in the step (b), the dischargeable amount of electric power is discharged from the battery to the outside. A step (e) of comparing the sum of the charged amount and the predicted power generation value with the predicted power consumption value;
When the sum of the charged amount and the predicted power generation value is larger than the predicted power consumption value, the dischargeable amount of power is discharged from the battery to the outside in the step (b). The method for controlling the power supply device according to claim 11. In the step (a), the generated power predicted value is obtained based on information on the weather during the disconnected period,
The method for controlling the power supply device includes:
When the information on the weather is updated after the discharge from the battery to the outside is started, a step (f) for newly obtaining the predicted power generation value based on the updated information on the weather;
The power supply device according to claim 11, further comprising a step (g) of newly obtaining the amount of electric power that can be discharged based on the newly generated predicted power generation value. Control method. A step (h) of comparing a difference between the newly calculated generated power predicted value and the original generated power predicted value with a predetermined threshold;
When the difference between the newly calculated generated power predicted value and the original generated power predicted value is larger than the threshold, the amount of the dischargeable power is newly determined in the step (g). The method for controlling a power supply device according to claim 13. In the step (c), the predicted power consumption value is obtained based on information related to the moving schedule of the mobile body during the non-connection period,
The method for controlling the power supply device includes:
Step (i) of newly obtaining the predicted power consumption value based on the information related to the movement schedule after the change when the information related to the movement schedule is changed after the discharge from the battery to the outside is started. ,
The step (j) of newly obtaining the amount of electric power that can be discharged based on the newly calculated power consumption predicted value is further included. The power supply device control method according to claim. When the amount of electric power that can be discharged is changed, a reference value that is a value obtained by subtracting the predicted power consumption value from the sum of the charged amount and the predicted generated power value is used as the dischargeable electric power after the change. Further comprising a step (k) for comparing with the quantity;
When the amount of the dischargeable power after the change is larger than the reference value, in the step (b), the dischargeable amount of power before the change is discharged from the battery, and the dischargeable after the change is possible. 16. When the amount of electric power is smaller than the reference value, in the step (b), the changed amount of electric power that can be discharged is discharged from the battery. The control method of the power supply device according to item. A step (l) of calculating a discharge start time so that the discharge of electric power from the battery is completed immediately before the start of use of the mobile body;
The method for controlling a power supply device according to any one of claims 10 to 16, wherein in the step (b), discharging from the battery is started at the discharge start time. A step (m) of obtaining a time when the purchase price of the electric power discharged from the battery is the most expensive,
The method for controlling a power supply device according to any one of claims 10 to 16, wherein, in the step (b), electric power is discharged from the battery at a time when the purchase price becomes the most expensive.