Power supply system, non-transitory computer readable medium, and power management method

Abstract

The invention provides a power supply system, a non-transitory computer-readable medium, and a power management method, which suppress deterioration of a power storage device. A power supply system (10) is provided with: a solar power generation device (20); a power storage device (30); a charging / discharging device (40) which is connected to the solar power generation device (20) and the power storage device (30), can be connected to a power load (120), stores the power generated by the solar power generation device (20) into the power storage device (30), and discharges the power stored in the power storage device (30) to the power load (120); a first setting unit (53) that sets a standard amount of charge (Vs) that is less than the amount of charge in the fully charged state with respect to the amount of charge to the electricity storage device (30); and a first charge / discharge control unit (54) that controls the charge / discharge device (40) and stores the power generated by the solar power generation device (20) in the power storage device (30) within a range equal to or less than the standard power storage amount (Vs).

Description

Technical Field

[0001] The present invention relates to a power supply system, a computer program for operating the power supply system, and a power management method. Background Art

[0002] For example, Japanese Patent Application Publication No. 2009-284586 discloses a power system that includes a solar cell, a distribution board, a charger and a storage battery and is connected to a commercial system and home appliances. In the power system described in Japanese Patent Application Publication No. 2009-284586, a power generation forecast of a solar cell and a power demand forecast are generated by time period based on meteorological information. The power system described in Japanese Patent Application Publication No. 2009-284586 is configured to formulate a plan to reduce reverse flow to the commercial system or a plan to reduce peak power of power purchased from the commercial system based on the power generation forecast of the solar cell and the power demand forecast by time period.

[0003] When a plan is executed to reduce the reverse power flow to the commercial system, the power system described in Japanese Patent Application Publication No. 2009-284586 charges the storage battery with surplus power if possible. Also, when a plan is executed to reduce the peak power, the power system described in Japanese Patent Application Publication No. 2009-284586 reduces the peak power by charging the storage battery with power from the commercial system in a planned manner.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2009-284586 Summary of the invention

[0007] Problems to be solved by the invention

[0008] According to the power system described in Japanese Patent Application Publication No. 2009-284586, the battery may be kept fully charged or nearly fully charged. Since the battery is kept nearly fully charged, the battery deteriorates.

[0009] Means for solving problems

[0010] The power supply system proposed herein comprises: a solar power generation device; a power storage device; a charging and discharging device, which is configured to be connected to the solar power generation device and the power storage device and can be connected to a power load, stores the power generated by the solar power generation device in the power storage device, and discharges the power stored in the power storage device to the power load; a first setting unit, which sets a standard storage capacity that is less than the storage capacity in a fully charged state with respect to the storage capacity of the power storage device; and a first charging and discharging control unit, which controls the charging and discharging device, so that the power generated by the solar power generation device is stored in the power storage device within a range below the standard storage capacity.

[0011] According to the above power supply system, the first charge and discharge control unit charges the power storage device within a range below the standard storage capacity. Therefore, the power storage device is not placed in a state close to being fully charged, thereby suppressing degradation of the power storage device.

[0012] In addition, the non-temporary computer-readable medium proposed herein records a computer program, which is configured to enable a computer to implement: a first charge and discharge control unit, which issues an instruction to store the electric power generated by the solar power generation device in the electric storage device and an instruction to discharge the electric power stored in the electric storage device to the electric load, to a charge and discharge device configured to be connected to a solar power generation device and a electric storage device and connectable to an electric load; and a first setting unit, which sets a standard storage capacity that is less than the storage capacity in a fully charged state with respect to the storage capacity of the electric storage device, and the first charge and discharge control unit issues an instruction to the charge and discharge device to store the electric power generated by the solar power generation device in the electric storage device within a range below the standard storage capacity.

[0013] The power management method proposed herein is a method for managing a power supply system, the power supply system comprising: a solar power generation device; a power storage device; a charging and discharging device, which is configured to be connected to the solar power generation device and the power storage device and can be connected to a power load, to store the power generated by the solar power generation device in the power storage device, and to discharge the power stored in the power storage device to the power load. The power management method proposed herein includes: a first setting step, setting a standard storage capacity less than the storage capacity in a fully charged state with respect to the storage capacity of the power storage device; and a standard storage step, controlling the charging and discharging device, to store the power generated by the solar power generation device in the power storage device within a range below the standard storage capacity.

[0014] The same effects as those of the above-mentioned power supply system can be achieved by a non-transitory computer-readable medium storing the above-mentioned computer program and a power management method. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a conceptual diagram showing a power supply system.

[0016] Figure 2 This is a graph showing the storage capacity of the vehicle battery on a sunny day and the day before in time series.

[0017] Figure 3 This is a graph showing the storage capacity of the vehicle-mounted battery in a time series when the maximum storage capacity is not increased.

[0018] Figure 4 This is a graph showing the storage capacity of the vehicle battery on a cloudy day and the day before in time series.

[0019] (Explanation of Reference Numerals)

[0020] 10: Power supply system; 20: Solar power generation device; 30: Power storage device; 31: On-board battery; 32: Fixed power storage device; 40: Charging and discharging device; 50: Control device; 50A: Operation terminal; 50B: Server; 51: Power generation prediction unit; 52: Power consumption prediction unit; 53: First setting unit; 54: First charging and discharging control unit; 55: Determination unit; 56: Second setting unit; 57: Second charging and discharging control unit; 58: Update unit; 100: Home; 110: Commercial system; 120: Power load; 121: Electric vehicle; 122: Electrical equipment (other power load); Vs: Standard storage capacity; Vt: Provisional storage capacity DETAILED DESCRIPTION

[0021] Hereinafter, an embodiment of the power supply system disclosed herein will be described with reference to the accompanying drawings. The embodiment described herein is of course not intended to specifically limit the present invention. Unless otherwise specifically mentioned, the present invention is not limited to the embodiment described herein. In addition, for components / parts that play the same role, the same reference numerals are appropriately assigned, and repeated descriptions are appropriately omitted.

[0022] [Structure of power supply system]

[0023] Figure 1 FIG. 1 is a conceptual diagram showing a power supply system 10 according to an embodiment. Figure 1 As shown, the power supply system 10 of this embodiment includes a solar power generation device 20, a plurality of power storage devices 30, a charging and discharging device 40, and a control device 50. Here, the power supply system 10 is a system that supplies power to a home 100. However, the object to which the power supply system 10 supplies power is not limited to the home 100, and may be, for example, an office, a factory, a commercial facility, etc. The power supply system 10 is connected to a commercial system 110 and a power load 120. Here, the power load 120 includes an electric vehicle 121 and an electrical device 122 used in the home 100.

[0024] One of the multiple power storage devices 30, a power storage device 31, is a vehicle-mounted battery loaded in an electric vehicle 121. The electric vehicle 121 may include all vehicles that use electricity as energy, such as electric vehicles, hybrid vehicles, plug-in hybrid vehicles, etc. The electric vehicle 121 may be a four-wheeled vehicle or a two-wheeled vehicle. Here, the other power storage devices 32 are stationary power storage devices. The number of vehicle-mounted batteries 31 and stationary power storage devices 32 is not particularly limited. The power storage device 30 may be composed of only a vehicle-mounted battery 31 or a stationary power storage device 32. The number of power storage devices 30 may also be one instead of multiple.

[0025] Here, the solar power generation device 20, the fixed power storage device 32 and the charging and discharging device 40 are set in the home 100. The electric vehicle 121 and the vehicle battery 31 loaded therein are in the home 100 when the electric vehicle 121 is parked in the home 100, and are moved outside the home 100 when the electric vehicle 121 is used. The operation terminal 50A, which is a part of the control device 50, is placed in the home 100 or carried by the user of the power supply system 10. The operation terminal 50A can be a dedicated operation terminal or a general terminal with an application installed, such as a smart phone. Here, the server 50B of the control device 50 connected to the operation terminal 50A is set at a server setting location outside the home 100. The function of the server 50B can be assumed by a computer on the cloud. Part or all of the functions of the server 50B can also be assumed by a device placed in the home 100. The setting location and setting form of the control device 50 are not particularly limited.

[0026] The power storage device 30 includes a power storage device that receives power from the solar power generation device 20 or the commercial system 110 and stores power, and discharges the power to the power load 120. The power storage device 30 includes, for example, a lithium-ion secondary battery. However, the power storage device included in the power storage device 30 is not limited to a lithium-ion secondary battery. In addition, the types of power storage devices included in the plurality of power storage devices 30 may be the same or different.

[0027] The charging and discharging device 40 is connected to the solar power generation device 20 and the power storage device 30. The charging and discharging device 40 is configured to be connectable to the power load 120. The charging and discharging device 40 stores the power generated by the solar power generation device 20 in the power storage device 30, and discharges the power stored in the power storage device 30 to the power load 120. The charging and discharging device 40 is also connected to the commercial system 110. The charging and discharging device 40 supplies the surplus power among the power generated by the solar power generation device 20 to the commercial system 110 through reverse power flow. In addition, when the power generated by the solar power generation device 20 is insufficient, the charging and discharging device 40 supplies the power supplied from the commercial system 110 to the power load 120 or stores it in the power storage device 30. In addition, the charging and discharging device 40 may be divided into a plurality of devices such as a device that converts the power generated by the solar power generation device 20 into AC power and a device that converts the AC power from the commercial system 110 into DC power and stores it in the power storage device 30. The plurality of devices may be installed in different places.

[0028] The control device 50 controls the charging and discharging device 40 to store the power of the solar power generation device 20 or the commercial system 110 in the power storage device 30, discharge the power of the solar power generation device 20 or the commercial system 110 to the power load 120, and discharge the power stored in the power storage device 30 to the power load 120. Figure 1 As shown, the control device 50 includes a power generation prediction unit 51, a power consumption prediction unit 52, a first setting unit 53, a first charge and discharge control unit 54, a determination unit 55, a second setting unit 56, a second charge and discharge control unit 57, and an update unit 58. A computer program configured to cause a computer to implement these processing units is installed in the control device 50. The control device 50 controls the power supply system 10 according to the above-mentioned computer program. The computer program can be recorded in a non-transitory computer-readable medium, for example. Examples of non-transitory computer-readable media include magnetic recording media (such as floppy disks, magnetic tapes, hard disk drives), CD-ROMs (Read Only Memory), and the like.

[0029] The power generation prediction unit 51 predicts the power generation of the solar power generation device 20. Specifically, the power generation prediction unit 51 obtains weather forecast information and predicts the power generation of the solar power generation device 20 based on the obtained weather forecast information. The power generation of the solar power generation device 20 is large on sunny days with a large amount of sunshine, and small on cloudy days with a small amount of sunshine or at night. Here, the power generation prediction unit 51 estimates the power generation of the solar power generation device 20 for each time period based on the weather forecast information for each time period.

[0030] The power consumption prediction unit 52 predicts the amount of power consumed by the power load 120 from each power storage device 30. With respect to the onboard battery 31, the power consumption prediction unit 52 predicts the amount of power consumed by the electric vehicle 121 and the amount of power consumed by other power loads (here, the electrical equipment 122 in the home 100). Thus, the power consumption prediction unit 52 predicts the amount of power consumed from the onboard battery 31. The power consumption prediction unit 52 predicts the amount of power consumed by the electric vehicle 121 based on data of the past driving distance of the electric vehicle 121. For example, the power consumption prediction unit 52 estimates the amount of power consumed by the electric vehicle 121 on weekdays based on the average value of the distance traveled by the electric vehicle 121 on weekdays. For example, in a case where the driving distance of the electric vehicle 121 on weekends is very scattered, the power consumption prediction unit 52 assumes that the driving distance of the electric vehicle 121 on weekends is a predetermined distance longer than the average driving distance on weekdays. The power consumption prediction unit 52 also predicts the power consumption of the electrical device 122 based on past power consumption data of the electrical device 122 , the predicted temperature obtained from weather forecast information, and the like.

[0031] The power consumption of the electric vehicle 121 and the electric device 122 is predicted for each time period. For example, if the time of using the electric vehicle 121 is fixed or the cooling and heating are not used because the residents are not in the home 100 during the daytime on weekdays, such a situation can be reflected in the power consumption prediction. A part of the information reflected in the power consumption prediction can be input into the operation terminal 50A by the user of the power supply system 10, for example.

[0032] The first setting unit 53 sets a standard storage capacity Vs (see Table 1 ) which is smaller than the storage capacity in the fully charged state, with respect to the storage capacity of each power storage device 30. Figure 2 ). The standard storage capacity Vs is the upper limit of the storage capacity under normal conditions. Here, the standard storage capacity Vs is the ratio (%) of the storage capacity to the fully charged state, that is, the so-called SOC (State of Charge). The storage equipment of each storage device 30 progresses in degradation due to being in a fully charged state or a state close to being fully charged (hereinafter also referred to as a "state close to being fully charged"). From the perspective of the life of each storage device 30, it is expected that each storage device 30 does not become a state close to being fully charged. In the present embodiment, the standard storage capacity Vs of multiple storage devices 30 are pre-set according to the type, specification, etc. of the storage device 30.

[0033] The first charge and discharge control unit 54 controls the charge and discharge device 40 to store the electric power generated by the solar power generation device 20 in each power storage device 30 within the range below the above-mentioned standard storage capacity Vs. In the present embodiment, the first charge and discharge control unit 54 supplies the electric power generated by the solar power generation device 20 to the electric load 120, and when there is a surplus in the electric power generated by the solar power generation device 20, controls the charge and discharge device 40 to store the electric power in the power storage device 30 up to the standard storage capacity Vs. When the charge amount of the power storage device 30 reaches the standard storage capacity Vs, the first charge and discharge control unit 54 supplies the surplus electric power to the commercial system 110 through the reverse flow. In the case where the amount of electric power generated by the solar power generation device 20 is less than the amount of electric power consumed by the electric load 120, such as at night, the first charge and discharge control unit 54 controls the charge and discharge device 40 to supply the electric power stored in the power storage device 30 to the electric load 120. When predicting that the power storage device 30 cannot store enough power to supply the power consumed by the power load 120 only by the power generation of the solar power generation device 20 , the first charge and discharge control unit 54 fills the shortfall from the commercial system 110 .

[0034] In addition, the amount of electric power stored in the electric storage device 30 under the control of the first charge and discharge control unit 54 is not limited to the standard storage capacity Vs as long as it is less than the standard storage capacity Vs. For example, the first charge and discharge control unit 54 may store the electric power generated by the solar power generation device 20 in each electric storage device 30 with the amount of storage capacity set based on the power generation prediction of the power generation prediction unit 51 and the power consumption prediction of the power consumption prediction unit 52 (but not exceeding the standard storage capacity Vs).

[0035] The determination unit 55 determines whether the electric vehicle 121 can travel as predicted by storing the on-board battery 31 to the standard storage capacity Vs based on the power generation predicted by the power generation prediction unit 51 and the power consumption of the electric vehicle 121 and the power consumption of other power loads (here, the electrical equipment 122 in the home 100) predicted by the power consumption prediction unit 52. For example, even if the storage capacity of the on-board battery 31 is the standard storage capacity Vs until the previous day, if it is predicted that the predicted power generation on that day is small or the predicted power consumption is large, and there is no power remaining in the on-board battery 31 for traveling as predicted during the scheduled use time of the electric vehicle 121, the determination unit 55 determines that the electric vehicle 121 cannot travel as predicted.

[0036] When the determination unit 55 determines that the electric vehicle 121 cannot travel as predicted, the second setting unit 56 sets a provisional storage capacity Vt (see FIG. 1 ) that is larger than the standard storage capacity Vs and that allows the electric vehicle 121 to travel as predicted. Figure 4). Thus, it is possible to avoid an inappropriate situation where the electric vehicle 121 cannot travel as predicted due to insufficient charge of the on-board battery 31. In this case, the second setting unit 56 increases the maximum storage capacity of the power storage device 30 from the standard storage capacity Vs to the provisional storage capacity Vt on the previous day. Thus, even if the power generation on that day is small or the power consumption is large, the on-board battery 31 has enough power to travel as predicted during the scheduled use time of the electric vehicle 121. In addition, by changing the settings in this way, it is possible to reduce the situation where insufficient power must be supplemented from the commercial system 110 on that day.

[0037] The second charge and discharge control unit 57 controls the charge and discharge device 40 to store the electric power generated by the solar power generation device 20 in the vehicle-mounted battery 31 to a provisional storage amount Vt.

[0038] The updating unit 58 updates the standard storage capacity Vs based on the function related to the aging of the storage device 30. If the capacity of each storage device 30 decreases due to aging, the updating unit 58 increases the standard storage capacity Vs accordingly. Thus, even if the storage device 30 is in a state of deterioration to a certain extent, the power supply system 10 can be used in the same way as before the degradation. The function related to the aging of the storage device 30 is not particularly limited. The function related to the aging of the storage device 30 may be, for example, a function showing the relationship between the total charging time and the reduction in capacity. The power supply system 10 may be configured to measure certain indicators (such as resistance value) of the storage device 30, and the function related to the aging of the storage device 30 may be, for example, a function showing the relationship between the indicator (such as resistance value) and the reduction in capacity.

[0039] [Operation of the power supply system]

[0040] The following describes an example of the operation of the power supply system 10 on a day when the solar power generation device 20 is predicted to have a large amount of power generation (hereinafter also referred to as a sunny day) and the previous day, and an example of the operation of the power supply system 10 on a day when the solar power generation device 20 is predicted to have a small amount of power generation (hereinafter also referred to as a cloudy day) and the previous day.

[0041] Figure 2 It is a graph showing the storage amount of the vehicle-mounted battery 31 on a sunny day and the day before in time series. Figure 2 The horizontal axis is the time (24-hour system). Figure 2 The vertical axis is the storage capacity of the vehicle-mounted battery 31. Figure 3 and Figure 4 The same is true for the horizontal and vertical axes.

[0042] If it is predicted that the forecast day is a sunny day, the forecast power generation amount of the solar power generation device 20 on that day is large. Figure 2As shown, the storage capacity of the vehicle-mounted battery 31 during the daytime (power generation time) of the previous day is maintained at the standard storage capacity Vs ( Figure 2 Here, for example, if the electric vehicle 121 is used every evening, the vehicle battery 31 is not charged during this period, and the electric vehicle 121 consumes the power stored in the vehicle battery 31 ( Figure 2 Further, during the period T2 Figure 2 During the period T3 (nighttime), the electric device 122 in the home 100 consumes the electric power stored in the vehicle-mounted battery 31. As a result, the amount of electric power stored in the vehicle-mounted battery 31 decreases.

[0043] If the solar power generation device 20 starts to generate electricity in the morning, the storage capacity of the vehicle-mounted battery 31 gradually increases and reaches the standard storage capacity Vs ( Figure 2 Thus, enough power to supply the power consumption of the electrical equipment 122 and the power consumption of the electric vehicle 121 on that day is stored in the vehicle-mounted battery 31. Figure 2 During the period T5, the electric vehicle 121 can travel as planned.

[0044] Figure 3 The graph shows the storage capacity of the vehicle battery 31 in a time series when the maximum storage capacity of the vehicle battery 31 is maintained at the standard storage capacity Vs regardless of the power generation forecast and the power consumption forecast, and the day is cloudy. The increase and decrease of the storage capacity of the vehicle battery 31 until the morning of the day (until the period T3) and Figure 2 Same. Figure 3 As shown, on cloudy days, the amount of power generated by the solar power generation device 20 is small, and the increase gradient of the stored power of the vehicle battery 31 is small. Therefore, the stored power of the vehicle battery 31 cannot reach the stored power Vn required for the electric vehicle 121 to travel as planned before the period T5 when the electric vehicle 121 is used. Therefore, the electric vehicle 121 cannot travel as planned. Alternatively, if the stored power of the vehicle battery 31 is to reach the stored power Vn before the period T5 when the electric vehicle 121 is used, it is necessary to receive power supply from the commercial system 110.

[0045] Figure 4 3 is a graph showing the amount of electricity stored in the vehicle battery 31 on a cloudy day and the day before in time series. Figure 4 As shown in FIG. 1 , in this embodiment, since it is predicted that the day is cloudy, the maximum storage capacity of the vehicle-mounted battery 31 on the previous day is increased to the provisional storage capacity Vt. As a result, the storage capacity of the vehicle-mounted battery 31 during the daytime (power generation time) on the previous day is maintained at the provisional storage capacity Vt ( Figure 4In addition, the provisional storage capacity Vt can be changed according to the power generation forecast and the power consumption forecast. By increasing the maximum storage capacity of the vehicle battery 31 on the previous day to the provisional storage capacity Vt, as shown in FIG. Figure 4 As shown in FIG. 1 , the remaining storage capacity Vr of the vehicle-mounted battery 31 at the end of the period T3 (nighttime) is greater than Figure 2 and Figure 3 There are many situations.

[0046] Since it is cloudy that day, the amount of electricity stored in the vehicle battery 31 increases slowly during the period T4. However, the remaining amount of electricity stored in the vehicle battery 31 at the end of the period T3 (nighttime) is large, so the amount of electricity stored in the vehicle battery 31 can reach the amount of electricity stored Vn required for the electric vehicle 121 to travel as planned before the period T5 in which the electric vehicle 121 is used. Therefore, the electric vehicle 121 can travel as planned. In addition, in this example, it is not necessary to receive power supply from the commercial system 110 in order to achieve a state in which the electric vehicle 121 can travel as planned.

[0047] Thus, according to the power supply system 10 of the present embodiment, the storage capacity of each power storage device 30 is set to be less than the standard storage capacity Vs as long as it does not hinder the travel of the electric vehicle 121. Therefore, the degradation of each power storage device 30 is suppressed. In addition, in the case where it is predicted that the travel of the electric vehicle 121 is hindered, the maximum storage capacity of the vehicle-mounted battery 31 is increased to the provisional storage capacity Vt. Thus, at least in terms of prediction, the electric vehicle 121 can travel as planned. In most cases where it is predicted that the electric vehicle 121 can travel as planned, it can actually be achieved. In addition, the situation where electricity is replenished from the commercial system 110 in order to make the electric vehicle 121 travel as planned is reduced.

[0048] In addition, in the above example, it is assumed that the power generation of the solar power generation device 20 is reduced, but the situation in which the maximum storage capacity of the vehicle-mounted battery 31 should be increased to the provisional storage capacity Vt is not limited to this. For example, when the power consumption is predicted to be large due to the long predicted driving distance of the electric vehicle 121 or the predicted power consumption of the electrical equipment 122 in the home 100, the maximum storage capacity of the vehicle-mounted battery 31 is also increased to the provisional storage capacity Vt.

[0049] [Effects of the Embodiments]

[0050] Hereinafter, the effects that can be achieved by the power supply system 10 of the present embodiment will be described.

[0051] The power supply system 10 of the present embodiment includes a solar power generation device 20, a power storage device 30, and a charge-discharge device 40 connected to the solar power generation device 20 and the power storage device 30. The charge-discharge device 40 is configured to be connectable to the power load 120, and is configured to store the power generated by the solar power generation device 20 in the power storage device 30, and discharge the power stored in the power storage device 30 to the power load 120. The power supply system 10 further includes: a first setting unit 53 that sets a standard storage capacity Vs that is smaller than the storage capacity in a fully charged state with respect to the storage capacity in the power storage device 30; and a first charge-discharge control unit 54 that controls the charge-discharge device 40 to store the power generated by the solar power generation device 20 in the power storage device 30 within a range of less than the standard storage capacity Vs. According to the power supply system 10, the first charge-discharge control unit 54 stores the power in the power storage device 30 within a range of less than the standard storage capacity Vs. Therefore, the power storage device 30 is not placed in a state close to being fully charged. Thus, deterioration of power storage device 30 is suppressed.

[0052] In the present embodiment, at least one power storage device 30 is a vehicle-mounted battery 31 mounted on an electric vehicle 121. The power load 120 includes the electric vehicle 121. With this configuration, the capacity of the stationary power storage device 32 can be reduced by utilizing the vehicle-mounted battery 31 of the electric vehicle 121.

[0053] The power supply system 10 of the present embodiment further includes a power generation prediction unit 51, a power consumption prediction unit 52, a determination unit 55, a second setting unit 56, and a second charge and discharge control unit 57. The power generation prediction unit 51 predicts the power generation of the solar power generation device 20. The power consumption prediction unit 52 predicts the power consumption of the electric vehicle 121 based on the data of the past travel distance of the electric vehicle 121, and predicts the power consumption consumed by the vehicle-mounted battery 31 by predicting the power consumption of other power loads (here, the electric equipment 122 in the home 100). The determination unit 55 determines whether the electric vehicle 121 can travel as predicted by storing the on-board battery 31 to the standard storage capacity Vs based on the power generation predicted by the power generation prediction unit 51 and the power consumption of the electric vehicle 121 and other power loads (the electric equipment 122 in the home 100) predicted by the power consumption prediction unit 52. When the determination unit 55 determines that the electric vehicle 121 cannot travel as predicted, the second setting unit 56 sets a provisional storage capacity Vt that is larger than the standard storage capacity Vs and allows the electric vehicle 121 to travel as predicted. The second charge and discharge control unit 57 controls the charge and discharge device 40 to store the electric power generated by the solar power generation device 20 in the vehicle-mounted battery 31 to the provisional storage capacity Vt.

[0054] According to this configuration, the maximum storage capacity of the vehicle-mounted battery 31 is increased to the provisional storage capacity Vt, so that the electric vehicle 121 can travel as predicted. Alternatively, the need to replenish power from the commercial system 110 in order to make the electric vehicle 121 travel as planned can be reduced.

[0055] The power supply system 10 of the present embodiment further includes an updating unit 58 that updates the standard storage capacity Vs based on a function related to the deterioration of the power storage device 30. With this configuration, even if the power storage device 30 is degraded to a certain extent, the power supply system 10 can be used in the same manner as before the degradation.

[0056] [Other embodiments]

[0057] An embodiment of the power supply system 10 proposed herein has been described above. However, the above embodiment is only an example and may be implemented in other forms. For example, in the above embodiment, the power generation of the solar power generation device 20 and the power consumption of the power load 120 are predicted by the power supply system 10. However, the power generation of the solar power generation device 20 and the power consumption of the power load 120 may also be predicted by other systems or people. In the above embodiment, part of the calculation or control performed by the power supply system 10 may also be performed by other systems or people.

[0058] The power management method disclosed herein is a method for managing a power supply system, the power supply system comprising: a solar power generation device; a power storage device; and a charging and discharging device, which is configured to be connected to the solar power generation device and the power storage device and can be connected to a power load, and stores the power generated by the solar power generation device in the power storage device, and discharges the power stored in the power storage device to the power load, and the method includes the following steps. That is, it includes: a first setting step, setting a standard storage capacity less than the storage capacity of the fully charged state with respect to the storage capacity of the power storage device; and a standard storage step, controlling the charging and discharging device, and storing the power generated by the solar power generation device in the power storage device within a range below the standard storage capacity. The subject that executes the above steps is not particularly limited.

[0059] In the power management method disclosed herein, at least one of the power storage devices may be an on-board battery loaded in an electric vehicle, and the power load may include an electric vehicle. The method may further include: a power generation prediction step, predicting the power generation of the solar power generation device; a power consumption prediction step, predicting the power consumption of the electric vehicle based on the data of the past driving distance of the electric vehicle, and predicting the power consumption of other power loads, thereby predicting the power consumption consumed from the on-board battery; a determination step, based on the predicted power generation and the predicted power consumption of the electric vehicle and other power loads, determining whether the electric vehicle can travel as predicted by storing the on-board battery to a standard storage capacity; a second setting step, in the case where it is determined that the electric vehicle cannot travel as predicted, setting a provisional storage capacity that is larger than the standard storage capacity and allows the electric vehicle to travel as predicted; and a provisional storage step, storing the power generated by the solar power generation device in the on-board battery to the provisional storage capacity.

[0060] The method may further include an updating step of updating the standard storage amount based on a function related to aging of the power storage device.

[0061] In addition, the above embodiments do not limit the present invention unless otherwise specified. In addition, the technology disclosed herein can be modified in various ways, and each structural element and each process described herein can be appropriately omitted or appropriately combined as long as no particular problem occurs.

[0062] This specification includes the disclosure described in the following sections.

[0063] Item 1. A power supply system comprising:

[0064] Solar power generation devices;

[0065] Power storage device;

[0066] a charging and discharging device configured to be connected to the solar power generation device and the power storage device and to be connectable to an electric load, to store the electric power generated by the solar power generation device in the power storage device, and to discharge the electric power stored in the power storage device to the electric load;

[0067] a first setting unit that sets a standard storage amount that is smaller than a storage amount in a fully charged state, with respect to the storage amount in the power storage device; and

[0068] The first charge and discharge control unit controls the charge and discharge device to store the electric power generated by the solar power generation device in the power storage device within a range not exceeding the standard storage capacity.

[0069] Item 2. The power supply system as described in item 1,

[0070] The power storage device is a vehicle-mounted battery installed in an electric vehicle.

[0071] The electrical load includes the electric vehicle.

[0072] Item 3. The power supply system according to item 2, further comprising:

[0073] A power generation prediction unit, which predicts the power generation of the solar power generation device;

[0074] a power consumption prediction unit that predicts the power consumption of the electric vehicle based on data of past travel distances of the electric vehicle and predicts the power consumption of other power loads, thereby predicting the power consumption consumed by the vehicle-mounted battery;

[0075] a determination unit that determines whether the electric vehicle can travel as predicted by charging the on-vehicle battery to the standard storage amount based on the power generation predicted by the power generation prediction unit and the power consumption of the electric vehicle and the other electric loads predicted by the power consumption prediction unit;

[0076] a second setting unit that sets a provisional storage capacity that is larger than the standard storage capacity and allows the electric vehicle to travel as predicted, when the determination unit determines that the electric vehicle cannot travel as predicted; and

[0077] The second charge and discharge control unit controls the charge and discharge device to store the electric power generated by the solar power generation device in the vehicle-mounted battery to the provisional storage amount.

[0078] Item 4. The power supply system according to any one of Items 1 to 3, further comprising:

[0079] An updating unit updates the standard storage amount based on a function related to deterioration of the power storage device.

[0080] Item 5. A non-transitory computer-readable medium having a computer program recorded thereon, wherein the computer program is configured to cause a computer to implement:

[0081] a first charge and discharge control unit that issues a command to a charge and discharge device that is configured to be connected to a solar power generation device and a power storage device and that can be connected to a power load, to store the power generated by the solar power generation device in the power storage device, and to discharge the power stored in the power storage device to the power load; and

[0082] The first setting unit sets a standard storage amount that is smaller than the storage amount in a fully charged state, with respect to the storage amount in the power storage device.

[0083] The first charge and discharge control unit issues a command to the charge and discharge device to store the electric power generated by the solar power generation device in the power storage device within a range not exceeding the standard storage amount.

[0084] Item 6. The non-transitory computer-readable medium of Item 5,

[0085] When the power storage device is a vehicle-mounted battery mounted on an electric vehicle and the power load includes the electric vehicle, the computer program is configured to cause the computer to implement:

[0086] A power generation prediction unit, which predicts the power generation of the solar power generation device;

[0087] a power consumption prediction unit that predicts the power consumption of the electric vehicle based on data of past travel distances of the electric vehicle and predicts the power consumption of other power loads, thereby predicting the power consumption consumed by the vehicle-mounted battery;

[0088] a determination unit that determines whether the electric vehicle can travel as predicted by charging the on-vehicle battery to the standard storage amount based on the power generation predicted by the power generation prediction unit and the power consumption of the electric vehicle and the other electric loads predicted by the power consumption prediction unit;

[0089] a second setting unit that sets a provisional storage capacity that is larger than the standard storage capacity and allows the electric vehicle to travel as predicted, when the determination unit determines that the electric vehicle cannot travel as predicted; and

[0090] The second charge and discharge control unit issues a command to the charge and discharge device to store the electric power generated by the solar power generation device in the vehicle-mounted battery to the provisional storage amount.

[0091] Item 7. The non-transitory computer-readable medium of Item 5 or 6,

[0092] The computer program is configured to cause a computer to implement an updating unit that updates the standard storage amount based on a function related to deterioration of the power storage device.

[0093] Item 8. A power management method, the power management method being a method for managing a power supply system, the power supply system comprising:

[0094] Solar power generation devices;

[0095] an electrical storage device; and

[0096] a charging and discharging device configured to be connected to the solar power generation device and the power storage device and to be connectable to an electric load, to store the electric power generated by the solar power generation device in the power storage device, and to discharge the electric power stored in the power storage device to the electric load;

[0097] The power management method comprises:

[0098] A first setting step of setting a standard storage capacity smaller than a storage capacity in a fully charged state with respect to the storage capacity of the power storage device; and

[0099] The standard power storage step controls the charging and discharging device to store the electric power generated by the solar power generation device in the power storage device within a range not exceeding the standard power storage amount.

[0100] Item 9. The power management method as described in Item 8,

[0101] The power storage device is a vehicle-mounted battery installed in an electric vehicle.

[0102] The electric load includes the electric vehicle,

[0103] The power management method further comprises:

[0104] A power generation prediction step, predicting the power generation of the solar power generation device;

[0105] a power consumption prediction step of predicting the power consumption of the electric vehicle based on data of past travel distances of the electric vehicle and predicting the power consumption of other electric loads, thereby predicting the power consumption consumed by the vehicle-mounted battery;

[0106] A determination step of determining whether the electric vehicle can travel as predicted by storing the on-vehicle battery to the standard storage amount based on the predicted power generation amount and the predicted power consumption amount of the electric vehicle and other electric loads;

[0107] A second setting step of setting a provisional storage amount that is larger than the standard storage amount and allows the electric vehicle to travel as predicted, if it is determined that the electric vehicle cannot travel as predicted; and

[0108] The temporary power storage step stores the electric power generated by the solar power generation device in the vehicle-mounted battery to the temporary power storage amount.

[0109] Item 10. The power management method according to Item 8 or 9, further comprising:

[0110] The updating step updates the standard storage amount based on a function related to aging of the power storage device.

Claims

1. A power supply system comprising: Solar power generation devices; Electricity storage device; a charging and discharging device configured to be connected to the solar power generation device and the power storage device and to be connectable to an electric load, to store the electric power generated by the solar power generation device in the power storage device, and to discharge the electric power stored in the power storage device to the electric load; a first setting unit for setting a standard storage amount smaller than a storage amount in a fully charged state with respect to the storage amount of the power storage device; as well as The first charge and discharge control unit controls the charge and discharge device to store the electric power generated by the solar power generation device in the power storage device within a range not exceeding the standard storage amount.

2. The power supply system according to claim 1, in, The power storage device is a vehicle-mounted battery installed in an electric vehicle, The electrical load includes the electric vehicle.

3. The power supply system according to claim 2, further comprising: A power generation prediction unit, which predicts the power generation of the solar power generation device; a power consumption prediction unit that predicts the power consumption amount consumed by the vehicle-mounted battery by predicting the power consumption amount of the electric vehicle based on data of past travel distances of the electric vehicle and predicting the power consumption amounts of the other power loads; a determination unit that determines whether the electric vehicle can travel as predicted by charging the on-vehicle battery to the standard storage amount based on the power generation predicted by the power generation prediction unit and the power consumption of the electric vehicle and the other electric loads predicted by the power consumption prediction unit; a second setting unit that sets a provisional storage capacity that is larger than the standard storage capacity and allows the electric vehicle to travel as predicted, when the determination unit determines that the electric vehicle cannot travel as predicted; and The second charge and discharge control unit controls the charge and discharge device to store the electric power generated by the solar power generation device in the vehicle-mounted battery to the provisional storage amount.

4. The power supply system according to claim 1, further comprising: An updating unit updates the standard storage amount based on a function related to deterioration of the power storage device.

5. A non-transitory computer-readable medium having a computer program recorded thereon, wherein the computer program is configured to cause a computer to implement: a first charge and discharge control unit that issues a command to a charge and discharge device that is configured to be connected to a solar power generation device and a power storage device and that can be connected to a power load, to store the power generated by the solar power generation device in the power storage device and to discharge the power stored in the power storage device to the power load; and The first setting unit sets a standard storage amount that is smaller than the storage amount in a fully charged state, with respect to the storage amount in the power storage device. The first charge and discharge control unit issues a command to the charge and discharge device to store the electric power generated by the solar power generation device in the power storage device within a range not exceeding the standard storage amount.

6. The non-transitory computer readable medium of claim 5, in, When the power storage device is a vehicle-mounted battery mounted on an electric vehicle and the power load includes the electric vehicle, the computer program is configured to cause the computer to implement: A power generation prediction unit, which predicts the power generation of the solar power generation device; a power consumption prediction unit that predicts the power consumption amount consumed by the vehicle-mounted battery by predicting the power consumption amount of the electric vehicle based on data of past travel distances of the electric vehicle and predicting the power consumption amounts of the other power loads; a determination unit that determines whether the electric vehicle can travel as predicted by charging the on-vehicle battery to the standard storage amount based on the power generation predicted by the power generation prediction unit and the power consumption of the electric vehicle and the other electric loads predicted by the power consumption prediction unit; a second setting unit for setting a provisional storage capacity greater than the standard storage capacity and capable of allowing the electric vehicle to travel as predicted, when the determination unit determines that the electric vehicle cannot travel as predicted; as well as The second charge and discharge control unit issues a command to the charge and discharge device to store the electric power generated by the solar power generation device in the vehicle-mounted battery to the provisional storage amount.

7. The non-transitory computer-readable medium of claim 5, wherein the computer program is configured to cause a computer to implement: An updating unit updates the standard storage amount based on a function related to deterioration of the power storage device.

8. A power management method, the power management method being a method for managing a power supply system, the power supply system comprising: Solar power generation devices; Electricity storage device; as well as a charging and discharging device configured to be connected to the solar power generation device and the power storage device and to be connectable to an electric load, to store the electric power generated by the solar power generation device in the power storage device, and to discharge the electric power stored in the power storage device to the electric load; The power management method comprises: A first setting step of setting a standard storage capacity smaller than a storage capacity in a fully charged state with respect to the storage capacity of the power storage device; as well as The standard power storage step controls the charging and discharging device to store the electric power generated by the solar power generation device in the power storage device within a range not exceeding the standard power storage amount.

9. The power management method according to claim 8, in, The power storage device is a vehicle-mounted battery installed in an electric vehicle. The electric load includes the electric vehicle, The power management method further comprises: A power generation prediction step, predicting the power generation of the solar power generation device; a power consumption prediction step of predicting the power consumption amount consumed by the vehicle-mounted battery by predicting the power consumption amount of the electric vehicle based on data of the past travel distance of the electric vehicle and predicting the power consumption amounts of the other electric loads; A determination step of determining whether the electric vehicle can travel as predicted by charging the on-vehicle battery to the standard storage amount based on the predicted power generation amount and the predicted power consumption amount of the electric vehicle and other electric loads; A second setting step of setting a provisional storage capacity greater than the standard storage capacity and capable of allowing the electric vehicle to travel as predicted, when it is determined that the electric vehicle cannot travel as predicted; as well as The temporary power storage step stores the electric power generated by the solar power generation device in the vehicle-mounted battery to the temporary power storage amount.

10. The power management method according to claim 8, further comprising: The updating step updates the standard storage amount based on a function related to aging of the power storage device.

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