Power management system

Abstract

To reduce a need for power purchase.SOLUTION: A power management system 1 includes an on-board storage battery 4, a stationary storage battery 3 and a power conditioner 10. The power conditioner 10 includes an AC / DC inverter 12 provided between a DC bus LB and a load connected to a system power supply Q, and a controller 13 controlling the charge / discharge of the on-board storage battery 4 and the stationary storage battery 3. The controller 13 controls such that power input to the power conditioner 10 is charged only to the stationary storage battery 3, according to a predetermined settings.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a power management system that manages the charging and discharging of stationary storage batteries and vehicle-mounted storage batteries. [Background technology]

[0002] With the widespread use of electric vehicles, technological developments have been underway in recent years to enable power interchange between stationary storage batteries and vehicle-mounted storage batteries. Furthermore, technologies for supplying solar-generated power to storage batteries and electric vehicles are known.

[0003] For example, Patent Document 1 discloses a charging / discharging system configured to stably supply solar-generated power to a storage battery and an electric vehicle with minimal control. Patent Document 1 also discloses a technology for transferring power from a stationary storage battery to an on-board storage battery.

[0004] Patent Document 2 discloses a technique for preventing excessive burden from being placed on a storage battery when transferring power from an in-vehicle storage battery to a stationary storage battery. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 5990786 [Patent Document 2] Patent Publication No. 2021-93788 Summary of the Invention [Problem to be solved by the invention]

[0006] In order to reduce electricity costs, there is a desire to utilize autonomous driving as much as possible, while using as little grid power as possible. Therefore, when autonomous driving is implemented, the exchange of power between the stationary storage battery, the onboard storage battery, and the load becomes important. However, since the vehicle in which the onboard storage battery is installed also serves as a means of transportation for the user, it is difficult to predict the remaining charge, and it is conceivable that the battery cannot be used as an autonomous driving storage battery when the vehicle is used for going out or traveling.

[0007] The present invention has been made in consideration of the above-mentioned problems, and aims to secure as much electricity as possible to be consumed by in-home loads without relying on on-board storage batteries, thereby reducing the need to purchase electricity. [Means for solving the problem]

[0008] In a first aspect of the present invention, a power management system is provided, which includes an on-board storage battery mounted on a vehicle, a stationary storage battery connected to the on-board storage battery via a DC bus, and a power conditioner. The power conditioner includes an AC / DC inverter provided between the DC bus and a load connected to a power grid, and a controller that controls charging and discharging of the on-board storage battery and the stationary storage battery based on charge / discharge mode settings of the on-board storage battery and the stationary storage battery and power consumption of the load, and the controller is configured to control the power input to the power conditioner so that only the stationary storage battery is charged according to a predetermined setting.

[0009] According to the configuration of the first aspect, a predetermined setting controls the power input to the power conditioner so that it charges only the stationary storage battery, i.e., it is possible to charge only the stationary storage battery. This makes it possible to ensure the remaining capacity of the stationary storage battery. In other words, the power conditioner can ensure the power to be supplied to the load without relying on the on-board storage battery, thereby reducing the need to purchase power.

[0010] In a second aspect of the present invention, in the above-mentioned first aspect, a reception unit is provided that receives user setting information indicating a priority of charging and discharging of the in-vehicle storage battery and the stationary storage battery by a user, and the predetermined setting may be a setting that instructs the stationary storage battery received by the reception unit to be the target for charging.

[0011] According to the second aspect, for example, during a power outage or at night, if a user wants to use a setting different from the default setting, the setting can be set to reflect the user's intention, thereby enabling the power supply within the power management system to match the situation at the time, such as a power outage.

[0012] In a third aspect of the present invention, in the first aspect, a solar cell panel is further provided, and the power conditioner further includes a solar cell DC / DC converter that converts the output voltage of the solar cell panel into a predetermined voltage and outputs it to the DC bus, and the controller may control the power input from the solar cell panel to the power conditioner so that it charges only the stationary storage battery when a predetermined setting is made.

[0013] According to the third aspect, even in a power management system including a solar panel as a component, the remaining capacity of the stationary storage battery can be secured, as in the first aspect, and the power conditioner can secure the power to supply to the load without relying on the on-board storage battery, thereby reducing the need to purchase power.

[0014] In a fourth aspect of the present invention, a power management system is provided, which includes an on-board storage battery mounted on a vehicle, a stationary storage battery connected to the on-board storage battery via a DC bus, and a power conditioner. The power conditioner includes an AC / DC inverter provided between the DC bus and a load connected to a grid power supply, and a controller that controls charging and discharging of the on-board storage battery and the stationary storage battery based on charge / discharge mode settings of the on-board storage battery and the stationary storage battery and power consumption of the load, and the controller is configured to set a charge / discharge rate of the stationary storage battery and the on-board storage battery according to a predetermined setting, and to charge and discharge the stationary storage battery and the on-board storage battery at the set rate.

[0015] According to the fourth aspect, by setting a high charging rate for the stationary storage battery, it is possible to ensure the remaining capacity of the stationary storage battery, as in the first aspect. In other words, it becomes possible for the power conditioner to ensure the power to be supplied to the load without relying on the on-board storage battery, thereby reducing the need to purchase power.

[0016] Furthermore, the charge / discharge ratio between the stationary storage battery and the vehicle-mounted storage battery can be set, in other words, the charge / discharge ratio between the stationary storage battery and the vehicle-mounted storage battery can be adjusted, making it possible to equalize the number of charge / discharge cycles between the stationary storage battery and the vehicle-mounted storage battery.

[0017] In a fifth aspect of the present invention, in the above-mentioned fourth aspect, a reception unit is provided that receives user setting information indicating a priority of charging and discharging of the in-vehicle storage battery and the stationary storage battery by a user, and the predetermined setting may be a setting that instructs the stationary storage battery received by the reception unit to be the target for charging.

[0018] According to the fifth aspect, for example, when a user wants to change the settings to their own preferences, different from the default settings, during a power outage or at night, the settings can be changed to reflect the user's preferences. This makes it possible to supply power within the power management system in a way that matches the situation at the time, such as a power outage.

[0019] In a sixth aspect of the present invention, in the fourth aspect, the power conditioner further includes a solar cell panel, and the power conditioner further includes a solar cell DC / DC converter that converts the output voltage of the solar cell panel into a predetermined voltage and outputs it to the DC bus, and the controller may control the power input from the solar cell panel to charge only the stationary storage battery when a predetermined setting is made.

[0020] According to the sixth aspect, even in a power management system including a solar panel as a component, the remaining capacity of the stationary storage battery can be secured, as in the fourth aspect, and the power conditioner can secure the power to supply to the load without relying on the on-board storage battery, thereby reducing the need to purchase power. [Effects of the Invention]

[0021] According to the present invention, it is possible to secure as much power as possible to be consumed by in-home loads without relying on an on-board storage battery, thereby reducing the need to purchase electricity. [Brief explanation of the drawings]

[0022] [Figure 1] Block diagram showing the overall configuration of the power management system [Figure 2] Flowchart showing an example of the operation of a power management system [Figure 3] Flowchart showing an example of a default setting operation [Figure 4] An example of power flow during default setting operation [Figure 5] A diagram showing an example of power flow during user-configured operation. [Figure 6] Flowchart showing another example of the operation of the power management system [Figure 7] Another example of power flow during user-configured operation (charging) [Figure 8] Another example of power flow during user-configured operation (charging) [Figure 9] Another example of power flow during user-configured operation (discharge) [Figure 10] Another example of power flow during user-configured operation (discharge) [Figure 11] Flowchart showing another example of the operation of the power management system [Figure 12] Another example of power flow during user-configured operation (charging) [Figure 13] Another example of power flow during user-configured operation (charging) [Figure 14] Another example of power flow during user-configured operation (charging) [Figure 15] Another example of power flow during user-configured operation (charging) DETAILED DESCRIPTION OF THE INVENTION

[0023] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. The following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the present invention, its scope of application, or its uses.

[0024] FIG. 1 shows an example of the configuration of a power management system 1.

[0025] The power management system 1 includes a solar panel 2, a stationary storage battery 3, an in-vehicle storage battery 4, a power conditioner 10, a household load 5 (corresponding to a load), a remote controller 6 (corresponding to a reception unit), and a wireless communication unit 7 (corresponding to a reception unit).

[0026] The stationary storage battery 3 is a stationary storage battery installed in a house, various facilities, etc., and is connected to the DC bus LB via a DC / DC converter 31 for the stationary storage battery. In a charge mode, the DC / DC converter 31 performs a step-down operation on the bus voltage of the DC bus LB to output charging power to the stationary storage battery 3, while in a discharge mode, it converts the output voltage of the stationary storage battery 3 to a predetermined voltage and outputs it to the DC bus LB. The DC / DC converter 31 may be built into the stationary storage battery 3 or the power conditioner 10.

[0027] The on-board battery 4 is a storage battery that is mounted on a vehicle such as an electric vehicle and used as a power source for the vehicle, and is connected to the DC bus LB via a DC / DC converter 41 for the on-board battery. In a charge mode, the DC / DC converter 41 performs a step-down operation on the bus voltage of the DC bus LB to output charging power to the on-board battery 4, while in a discharge mode, it converts the output voltage of the on-board battery 4 to a predetermined voltage and outputs it to the DC bus LB. The DC / DC converter 41 may be built into the on-board battery 4 or the power conditioner 10.

[0028] The power conditioner 10 includes a DC / DC converter 11 for solar cells, an AC / DC inverter 12, and a controller 13. The power conditioner 10 is configured to be able to operate in a discharge mode and a charge mode. In the discharge mode, the power generated by the solar cell panel 2, the power stored in the stationary storage battery 3, and / or the power stored in the vehicle storage battery 4 are received as input, converted into AC power, and output to the domestic load 5. In the charge mode, the power generated by the solar cell panel 2 is received as input, and the DC / DC converter 11 converts the voltage of the power converted, and / or the AC power input from the grid power source Q is converted into DC power by the AC / DC inverter 12, and the converted power is supplied to the stationary storage battery 3 and / or the vehicle storage battery 4. Note that the charge mode and the discharge mode may be collectively referred to as the "charge / discharge mode."

[0029] The DC / DC converter 11 converts the output voltage of the solar cell panel 2 into a predetermined voltage and outputs it to the DC bus LB. The solar cell panel 2 and the DC / DC converter 11 are connected by an electric line L1.

[0030] In a charging mode, the AC / DC inverter 12 converts AC input from the system power supply Q into DC and outputs the DC to the DC bus B, while in a discharging mode, it converts the bus voltage of the DC bus B into AC and outputs the AC to the domestic load 5. The system power supply Q and the AC / DC inverter 12 are connected by an electric line L2. The domestic load 5 is connected to the system power supply Q and the AC / DC inverter 12 via the electric line L2.

[0031] The controller 13 has a function of controlling the overall operation of the power management system 1. Specifically, the controller 13 has a function of controlling the charging and discharging of the in-vehicle storage battery 4 and the stationary storage battery 3 based on information on power generated by the solar cell panel 2, the charge and discharge mode settings of the in-vehicle storage battery 4 and the stationary storage battery 3, and charge and discharge power information derived from the power consumption of the domestic load 5.

[0032] Here, the charge / discharge mode setting refers to a default mode setting that is preset in the controller 13 based on, for example, the time of day, the remaining charge of the storage battery, etc. The charge / discharge setting information includes, for example, mode setting information indicating whether the in-vehicle storage battery 4 and the stationary storage battery 3 will operate in a charge mode or a discharge mode, and set power value information indicating a charge power value or a discharge power value. When there is no information about the power generated by the solar cell panel 2, the controller 13 controls the charge / discharge of the in-vehicle storage battery 4 and the stationary storage battery 3 based on mode setting information that sets the charge / discharge mode of the in-vehicle storage battery 4 and the stationary storage battery 3 and the power consumption of the household load 5. When there is no information about the power generated by the solar cell panel 2, the controller 13 controls the charge / discharge of the in-vehicle storage battery 4 and the stationary storage battery 3 based on the ... power consumption of the household load 5. The cases where there is no information about the power generated by the solar cell panel 2 include when the solar cell panel 2 is not connected and when the solar cell panel 2 is not operating, such as during the nighttime.

[0033] In addition, the controller 13 may have a function of controlling the power input to the power conditioner 10 so that it is charged only to the stationary storage battery 3 through a predetermined setting, and may be configured to set the charging / discharging ratio of the stationary storage battery 3 and the vehicle storage battery 4 through a predetermined setting, and to charge / discharge the stationary storage battery 3 and the vehicle storage battery 4 at the set ratio.

[0034] Furthermore, when user setting information is acquired as a predetermined setting via the remote controller 6 or the wireless communication unit 7, the controller 13 may be configured to apply the user setting information by prioritizing it over the above-described charge / discharge setting information (default setting). That is, when the user setting information is acquired, the controller 13 may be configured to control the charging / discharging of the stationary storage battery 3 and the vehicle-mounted storage battery 4 based on the user setting information. Specific content of the user setting information is not particularly limited, and may include, for example, information for setting the stationary storage battery to be charged / discharged only, information for setting the ratio of charging / discharging between the stationary storage battery and the vehicle-mounted storage battery, and setting information indicating the priority of charging / discharging, i.e., whether the stationary storage battery or the vehicle-mounted storage battery is to be prioritized. The user setting information may be the same as the default setting or may be different from the default setting. The charging / discharging operations of each storage battery and the domestic load 5 of the power management system 1 will be described later with specific examples.

[0035] The remote controller 6 and the wireless communication unit 7 function as a receiving unit that receives user setting information indicating the priority of charging and discharging set by the user.

[0036] The remote controller 6 is installed, for example, in a house together with the house load 5, and is configured to accept input operations from the user regarding user setting information using mechanical push buttons, touch sensors, touch panels, or the like.

[0037] The wireless communication unit 7 receives user setting information from wireless transmission means such as a tablet 8 or a smartphone 9 via wireless communication.

[0038] -Example of power management system operation- Next, an example of the operation of the power management system 1 will be described with reference to Figures 2 to 15. Although in reality, complex calculations including conditional branching and the like are performed, the outline will be explained here in a simplified manner.

[0039] (Example 1) In this operation example 1, the default setting is to give top priority to charging the vehicle-mounted storage battery 4. Furthermore, during this operation, the charge command value is 5.5 [kW], the ratings of the stationary storage battery 3 and the vehicle-mounted storage battery 4 are 5.5 [kW], the power generation amount of the solar panel 2 is 0 [kW], and the power consumption of the in-house load is 0 [kW].

[0040] In step S10 of FIG. 2, the power management system 1 executes an operation set in the default settings (hereinafter referred to as "default setting operation").

[0041] FIG. 3 is a flow diagram showing an example of the default setting operation.

[0042] In step S11, the controller 13 receives an instruction from a higher-level interface (not shown) to operate the stationary storage battery 3 and the vehicle-mounted storage battery 4 in load-following mode as a default setting, and to give top priority to charging the vehicle-mounted storage battery 4.

[0043] In step S12, the controller 13 sets the power supply source and the power supply destination. In the default setting, priority is given to charging the vehicle-mounted storage battery 4, so the controller 13 sets the vehicle-mounted storage battery 4 as the power supply destination and sets the system power source Q as the power supply source.

[0044] In step S13, the controller 13 calculates the charge power / discharge power of each storage battery. In this example, the charge command value is 5.5 [kW] and the power generated by the solar panel 2 is 0 [kW], so the controller 13 calculates 5.5 [kW] - 0 [kW] and sets the power command value for the stationary storage battery 3 to 5.5 [kW]. The calculation result (power command value) obtained here is referred to as "default command information."

[0045] In step S14, the controller 13 executes charge / discharge control of the stationary storage battery 3 and the vehicle-mounted storage battery 4 based on the default command information. In this example, the power conditioner 10 is set to a charge mode and controlled so that 5.5 kW of power is output to the DC bus LB. The DC / DC converter 41 is also set to a charge mode and controlled so that the charging power of the vehicle-mounted storage battery 4 becomes 5.5 kW.

[0046] Fig. 4 shows the flow of power in the power management system 1 during the default setting operation. For convenience, the solar cell panel 2 and the in-home load 5 are omitted from Fig. 4, and the same applies to Figs. 5, 7, and 8.

[0047] Returning to FIG. 2, when the controller 13 acquires the user setting information via the remote controller 6 or the wireless communication unit 7, it controls the charging and discharging of the stationary storage battery 3 and the vehicle-mounted storage battery 4 based on the user setting information.

[0048] Specifically, first, in step S21, user setting information is acquired. In this example, since the user will not be using the car the next day, the user setting information is set to give top priority to charging the stationary storage battery 3. Then, the controller 13 acquires the user setting information.

[0049] In step S22, the controller 13 sets the power supply source and the power supply destination based on the acquired user setting information. Here, since the controller 13 has received a command to prioritize charging the stationary storage battery 3, the controller 13 sets the stationary storage battery 3 as the power supply destination and sets the system power source Q as the power supply source.

[0050] In step S23, the controller 13 calculates the charge power / discharge power of each storage battery. In this example, the charge command value is 5.5 [kW] and the power generated by the solar panel 2 is 0 [kW], so the controller 13 calculates 5.5 [kW] - 0 [kW] and sets the power command value for the stationary storage battery 3 to 5.5 [kW]. The calculation result (power command value) obtained here is referred to as "user command information."

[0051] In step S24, the controller 13 executes charge / discharge control of the stationary storage battery 3 and the vehicle storage battery 4 based on the user command information. In this example, the power conditioner 10 is set to a charge mode and controlled so that 5.5 kW of power is output to the DC bus LB. The DC / DC converter 31 is also set to a charge mode and controlled so that the charging power of the stationary storage battery 3 becomes 5.5 kW.

[0052] Fig. 5 shows the flow of power in the power management system 1 during the above-described user setting operation. As shown in Fig. 5, in this example, the user setting information controls the power input to the power conditioner 10 so that it is charged only to the stationary storage battery 3.

[0053] This makes it possible to secure the remaining power of the stationary storage battery 3. In other words, the power conditioner 10 can secure the power to be supplied to the domestic load 5 without relying on the in-vehicle storage battery 4, thereby reducing the need to purchase power.

[0054] In the above operation example, the predetermined setting is assumed to be a user setting, but is not limited to this. For example, the predetermined setting may include a setting made by an installer when installing the power management system 1. The setting made by the installer may be performed via the remote controller 6 or may be performed using a tablet 8 or the like. The predetermined setting may also be pre-installed in a program running on the controller 13. Furthermore, the predetermined setting is not limited to a setting made by electrical means, but may also be a setting made by mechanical means such as a push button or switching wiring. The same applies to the other operation examples described below.

[0055] (Example 2) Next, a second operational example will be described with reference to the flowchart of FIG.

[0056] Operation example 2 is an operation when the default setting is to give top priority to charging the in-vehicle storage battery 4. In addition, the charge command value is 8 [kW], the ratings of the stationary storage battery 3 and the in-vehicle storage battery 4 are 5.5 [kW], the power generation amount of the solar panel 2 is 0 [kW], and the power consumption of the in-house load is 0 [kW]. In this operation example, it is assumed that no predetermined settings (for example, setting operations by the user) have been made.

[0057] 6, default setting information is acquired. Here, information on the charge command value, rating information on the stationary storage battery 3 and the vehicle-mounted storage battery 4, information on the amount of power generated by the solar panel 2, information on power consumption by the home load, and mode setting information that prioritizes charging the vehicle-mounted storage battery 4 are acquired.

[0058] Since there is no user setting, step S21 is skipped, and in the next step S30, the controller 13 determines the charge / discharge mode. Since charging the in-vehicle storage battery 4 has the highest priority, it is determined that the device should operate in the charge mode, and the flow proceeds to step S50.

[0059] In step S50, the controller 13 determines which of the stationary storage battery 3 and the vehicle-mounted storage battery 4 has priority. In this example, it is determined that the vehicle-mounted storage battery 4 has priority, and the flow proceeds to step S53.

[0060] In step S53, the controller 13 determines to allocate an upper limit of the 8 [kW] output from the power conditioner 10 for charging the vehicle-mounted storage battery 4, for example, 5.5 [kW] which is the rating, to the charging of the vehicle-mounted storage battery 4. In the next step S54, the controller 13 determines to allocate the surplus (8 [kW] - 5.5 [kW]) to the charging of the stationary storage battery 3.

[0061] In the next step S24, the controller 13 executes charge / discharge control of the stationary storage battery 3 and the vehicle-mounted storage battery 4 based on the contents determined in steps S53 and S54. In this example, the power conditioner 10 is set to a charge mode and controlled to output 8 [kW] of power to the DC bus LB. The DC / DC converter 41 is also set to a charge mode and controlled to supply 5.5 [kW] of charging power to the vehicle-mounted storage battery 4, and the DC / DC converter 31 is also set to a charge mode and controlled to supply 2.5 [kW] of charging power to the stationary storage battery 3.

[0062] FIG. 7 shows the flow of power in the power management system 1 after the user's settings are reflected in the second operation example.

[0063] (Example 3) Next, an operation example 3 will be described with reference to the flowchart in Fig. 6. Operation example 3 is an operation performed when, in addition to or instead of the default operation of operation example 2, user setting information that places the highest priority on charging the stationary storage battery 3 is acquired in the controller 13 via the remote controller 6 or the wireless communication unit 7.

[0064] In step S21, user setting information is acquired. In this example, the controller 13 acquires user setting information that gives top priority to charging the stationary storage battery 3.

[0065] In the next step S30, the controller 13 determines the charge / discharge mode. Since charging the stationary storage battery 3 has the highest priority, it is determined that the controller 13 should operate in the charge mode, and the flow proceeds to step S50.

[0066] In step S50, the controller 13 determines which of the stationary storage battery 3 and the in-vehicle storage battery 4 has priority. In this example, it is determined that the stationary storage battery 3 has priority, and the flow proceeds to step S51.

[0067] In step S51, the controller 13 determines to allocate an upper limit of the 8 [kW] output from the power conditioner 10 for charging the stationary storage battery 3, for example, 5.5 [kW] which is the rating, to the charging of the stationary storage battery 3. In the next step S52, the controller 13 determines to allocate the surplus (8 [kW] - 5.5 [kW]) to the charging of the in-vehicle storage battery 4.

[0068] In the next step S24, the controller 13 executes charge / discharge control of the stationary storage battery 3 and the vehicle-mounted storage battery 4 based on the contents determined in steps S51 and S52. In this example, the power conditioner 10 is set to a charge mode and controlled to output 8 kW of power to the DC bus LB. The DC / DC converter 31 is also set to a charge mode and controlled to charge the stationary storage battery 3 with 5.5 kW of power, and the DC / DC converter 41 is also set to a charge mode and controlled to charge the vehicle-mounted storage battery 4 with 2.5 kW of power.

[0069] 8 shows the flow of power in the power management system 1 after the user's settings have been reflected in operation example 3. In this way, by enabling settings that reflect the user's intentions, it becomes possible to supply power within the power management system that matches the situation at any given time.

[0070] (Example 4) Next, operation example 4 will be described with reference to the flowchart in Fig. 6. Operation example 4 is an operation when the default setting is set to give top priority to discharge from the in-vehicle storage battery 4. In this example, the discharge command value is 8 [kW], the ratings of the stationary storage battery 3 and the in-vehicle storage battery 4 are 5.5 [kW], the power generation amount of the solar cell panel 2 is 0 [kW], and the power consumption of the in-house load is 0 [kW]. In this operation example, it is also assumed that no predetermined setting (for example, a setting operation by the user) has been made.

[0071] 6, default setting information is acquired. Here, the discharge command value is 8 [kW], rating information of the stationary storage battery 3 and the vehicle-mounted storage battery 4, power generation amount information of the solar cell panel 2, power consumption information of the home load, and mode setting information that prioritizes charging the vehicle-mounted storage battery 4 are acquired.

[0072] Since there is no user setting, step S21 is skipped, and in the next step S30, the controller 13 determines the charge / discharge mode. Since discharging the in-vehicle storage battery 4 has the highest priority, it is determined that the device should be operated in the discharge mode, and the flow proceeds to step S40.

[0073] In step S40, the controller 13 determines which of the stationary storage battery 3 and the vehicle-mounted storage battery 4 has priority. In this example, it is determined that the vehicle-mounted storage battery 4 has priority, and the flow proceeds to step S43.

[0074] In step S43, the controller 13 determines to allocate an upper limit of the discharge of the vehicle-mounted storage battery 4, for example, 5.5 [kW] which is the rating, out of the 8 [kW] output from the power conditioner 10, to the discharge from the vehicle-mounted storage battery 4. In the next step S44, the controller 13 determines to allocate the surplus (8 [kW] - 5.5 [kW]) to the discharge of the stationary storage battery 3.

[0075] In the next step S24, the controller 13 executes charge / discharge control of the stationary storage battery 3 and the vehicle-mounted storage battery 4 based on the details determined in steps S43 and S44. In this example, the power conditioner 10 is set to a discharge mode and controlled to output 8 kW of power to the domestic load 5 (electrical path L2). In addition, the DC / DC converter 41 is set to a discharge mode and controlled to output 5.5 kW of discharge power from the vehicle-mounted storage battery 4, and the DC / DC converter 31 is set to a discharge mode and controlled to output 2.5 kW of discharge power from the stationary storage battery 3.

[0076] FIG. 9 shows the flow of power in the power management system 1 after the settings made by the user in the fourth operational example are reflected.

[0077] (Example 5) Next, operation example 5 will be described with reference to the flowchart in Fig. 6. Operation example 5 is an operation performed when, after the discharge operation in operation example 4, user setting information that gives top priority to discharging the stationary storage battery 3 is acquired in the controller 13 via the remote controller 6 or the wireless communication unit 7. Note that the following description will focus on differences from operation example 4.

[0078] In step S21, user setting information is acquired. In this example, the controller 13 acquires user setting information that gives top priority to discharging the stationary storage battery 3.

[0079] In the next step S30, the controller 13 determines the charge / discharge mode. Since the highest priority is given to discharging the stationary storage battery 3, it is determined that the stationary storage battery 3 should be operated in the discharge mode, and the flow proceeds to step S40.

[0080] In step S40, the controller 13 determines which of the stationary storage battery 3 and the vehicle-mounted storage battery 4 has priority. In this example, it is determined that the stationary storage battery 3 has priority, and the flow proceeds to step S41.

[0081] In step S41, the controller 13 determines to allocate an upper limit of the discharge of the stationary storage battery 3, for example, 5.5 [kW] which is the rating, out of the discharge command value of 8 [kW], to the discharge of the stationary storage battery 3. In the next step S42, the controller 13 determines to allocate the surplus (8 [kW] - 5.5 [kW]) to the discharge of the in-vehicle storage battery 4.

[0082] In the next step S24, the controller 13 executes charge / discharge control of the stationary storage battery 3 and the vehicle-mounted storage battery 4 based on the details determined in steps S41 and S42. In this example, the power conditioner 10 is set to a discharge mode and controlled to output 8 kW of power to the domestic load 5 (electrical path L2). The DC / DC converter 31 is also set to a discharge mode and controlled to output 5.5 kW of power to the stationary storage battery 3, and the DC / DC converter 41 is also set to a discharge mode and controlled to output 2.5 kW of power to the vehicle-mounted storage battery 4.

[0083] 10 shows the flow of power in the power management system 1 after the user's settings have been reflected in operation example 5. In this way, by making settings that reflect the user's intentions, it becomes possible to supply power within the power management system that matches the situation at the time.

[0084] (Example 6) Next, a sixth operational example will be described with reference to the flowchart of FIG.

[0085] Operation example 6 is an operation when the charging ratio to the stationary storage battery 3 is set to 60% and the charging ratio to the vehicle storage battery 4 is set to 40% as default settings. In addition, the charging command value is 8 [kW], the ratings of the stationary storage battery 3 and the vehicle storage battery 4 are 5.5 [kW], the power generation amount of the solar panel 2 is 0 [kW], and the power consumption of the home load is 0 [kW]. In this operation example, it is assumed that no predetermined settings (for example, setting operations by the user) have been made.

[0086] 11, default setting information is acquired. Here, information on the charge command value, rating information on the stationary storage battery 3 and the in-vehicle storage battery 4, power generation amount information on the solar cell panel 2, power consumption information on the in-house load, and the above-mentioned charge ratio information are acquired.

[0087] Since there is no user setting, step S21 is skipped, and in the next step S30, the controller 13 determines the charge / discharge mode. Since the charge ratio has been set, it is determined that the device should operate in the charge mode, and the flow proceeds to step S32.

[0088] In step S32, the controller 13 sets the charging ratio. In this example, of the 8 [kW] output from the power conditioner 10, it is determined that 60% (4.8 [kW]) is allocated to charging the stationary storage battery 3, and 40% (3.2 [kW]) is allocated to the vehicle storage battery 4.

[0089] In the next step S24, the controller 13 executes charge / discharge control of the stationary storage battery 3 and the vehicle-mounted storage battery 4 based on the content determined in step S32. In this example, the power conditioner 10 is set to a charge mode and controlled to output 8 [kW] of power to the DC bus LB. The DC / DC converter 31 is set to a charge mode and controlled to charge the stationary storage battery 3 with 4.8 [kW] of power, and the DC / DC converter 41 is set to a charge mode and controlled to charge the vehicle-mounted storage battery 4 with 3.2 [kW] of power.

[0090] FIG. 12 shows the flow of power in the power management system 1 after the user's settings are reflected in the sixth operational example.

[0091] (Example 7) Next, an operation example 7 will be described with reference to the flowchart in Fig. 11. The operation example 7 is an operation performed when, in addition to or instead of the default operation, the controller 13 acquires user setting information for changing the charging ratio via the remote controller 6 or the wireless communication unit 7.

[0092] Step S20 is the same as in the above-described Operation Example 6, and a detailed description thereof will be omitted here.

[0093] In step S21, user setting information is acquired. In this example, the controller 13 acquires user setting information that sets the charging rate for the stationary storage battery 3 to 80% and the charging rate for the in-vehicle storage battery 4 to 20% (see FIG. 13).

[0094] In the next step S30, the controller 13 determines the charge / discharge mode. Since the charge ratio has been set, it is determined that the battery should be operated in the charge mode, and the flow proceeds to step S32.

[0095] In step S32, the controller 13 sets the charging ratio. In this example, 80% of the 8 [kW] output from the power conditioner 10 is specified to be allocated to charging the stationary storage battery 3, but since the rated power of the stationary storage battery 3 is 5.5 [kW], 5.5 [kW] is allocated to the stationary storage battery 3. Then, the surplus 2.5 [kW] is allocated to the in-vehicle storage battery 4.

[0096] In the next step S24, the controller 13 executes charge / discharge control of the stationary storage battery 3 and the vehicle-mounted storage battery 4 based on the content determined in step S32. In this example, the power conditioner 10 is set to a charge mode and controlled to output 8 [kW] of power to the DC bus LB. The DC / DC converter 31 is also set to a charge mode and controlled to charge the stationary storage battery 3 with 5.5 [kW] of power, and the DC / DC converter 41 is also set to a charge mode and controlled to charge the vehicle-mounted storage battery 4 with 2.5 [kW] of power.

[0097] FIG. 13 shows the flow of power in the power management system 1 after the settings made by the user in the seventh operational example are reflected.

[0098] (Example 8) Next, an eighth operational example will be described with reference to the flowchart of FIG.

[0099] Operation example 8 is an operation when the default settings are that the discharge ratio of the stationary storage battery 3 is 60% and that of the vehicle storage battery 4 is 40%. Also, the discharge command value is 8 [kW], the ratings of the stationary storage battery 3 and the vehicle storage battery 4 are 5.5 [kW], the power generation amount of the solar panel 2 is 0 [kW], and the power consumption of the home load is 0 [kW]. In this operation example, it is assumed that no predetermined settings (for example, setting operations by the user) have been made.

[0100] 11, default setting information is acquired. Here, information on the discharge command value, rating information on the stationary storage battery 3 and the in-vehicle storage battery 4, power generation amount information on the solar cell panel 2, power consumption information on the in-house load, and the above-mentioned discharge ratio information are acquired.

[0101] Since there is no user setting, step S21 is skipped, and in the next step S30, the controller 13 determines the charge / discharge mode. Since the discharge ratio has been set, it is determined that the device should be operated in the discharge mode, and the flow proceeds to step S31.

[0102] In step S31, the controller 13 sets the discharge ratio. In this example, of the discharge command value of 8 [kW], it is determined that 60% (4.8 [kW]) is allocated to the discharge of the stationary storage battery 3 and 40% (3.2 [kW]) is allocated to the vehicle storage battery 4.

[0103] In the next step S24, the controller 13 executes charge / discharge control of the stationary storage battery 3 and the vehicle-mounted storage battery 4 based on the content determined in step S31. In this example, the power conditioner 10 is set to a discharge mode and controlled to output 8 kW of power to the in-house load (electrical path L2). The DC / DC converter 31 is also set to a discharge mode and controlled to output 4.8 kW of discharge power from the stationary storage battery 3, and the DC / DC converter 41 is also set to a discharge mode and controlled to output 3.2 kW of discharge power from the vehicle-mounted storage battery 4.

[0104] FIG. 14 shows the flow of power in the power management system 1 after the user's settings in the eighth operational example are reflected.

[0105] (Example 9) Next, an operation example 7 will be described with reference to the flowchart in Fig. 11. An operation example 9 is an operation performed when user setting information for changing the discharge ratio is acquired in the controller 13 via the remote controller 6 or the wireless communication unit 7 in addition to or instead of the default operation.

[0106] Step S20 is the same as in the above-described Operation Example 8, and a detailed description thereof will be omitted here.

[0107] In step S21, user setting information is acquired. In this example, the controller 13 acquires user setting information that sets the discharge ratio of the stationary storage battery 3 to 80% and the discharge ratio of the in-vehicle storage battery 4 to 20% (see FIG. 15).

[0108] In the next step S30, the controller 13 determines the charge / discharge mode. Since the discharge ratio has been set, it is determined that the battery should be operated in the discharge mode, and the flow proceeds to step S31.

[0109] In step S31, the controller 13 sets the discharge ratio. In this example, of the discharge command value of 8 [kW], 80% is specified to be allocated to the discharge of the stationary storage battery 3. However, since the rated power of the stationary storage battery 3 is 5.5 [kW], 5.5 [kW] is allocated to the stationary storage battery 3. Then, the surplus of 2.5 [kW] is allocated to the in-vehicle storage battery 4.

[0110] In the next step S24, the controller 13 executes charge / discharge control of the stationary storage battery 3 and the vehicle-mounted storage battery 4 based on the content determined in step S31. In this example, the power conditioner 10 is set to a discharge mode and controlled to output 8 kW of power to the in-house load (electrical path L2). The DC / DC converter 31 is also set to a discharge mode and controlled to output 5.5 kW of discharge power from the stationary storage battery 3, and the DC / DC converter 41 is also set to a discharge mode and controlled to output 2.5 kW of discharge power from the vehicle-mounted storage battery 4.

[0111] 15 shows the flow of power in the power management system 1 after the settings made by the user are reflected in operation example 9. In this way, by making settings that reflect the user's intentions, it becomes possible to supply power within the power management system that matches the situation at the time.

[0112] As described above, the embodiments have been described as examples of the technology disclosed in this application. However, the technology in this disclosure is not limited to these, and can be applied to embodiments in which appropriate modifications, substitutions, additions, omissions, etc. are made. Furthermore, it is also possible to combine the components described in the above embodiments to create new embodiments.

[0113] For example, in Fig. 5 of the above embodiment, an example has been described in which the controller 13 controls the power input from the grid power supply Q to the power conditioner 10 based on a predetermined setting so that only the stationary storage battery 3 is charged, but the present invention is not limited to this. For example, the controller 13 may control the power input from the solar cell panel 2 to the power conditioner 10 based on a predetermined setting so that only the stationary storage battery 3 is charged. [Industrial Applicability]

[0114] The present invention is extremely useful because it makes it possible to reduce the need to purchase electricity. [Explanation of symbols]

[0115] 1. Power Management System 2. Solar panels 3 Stationary storage batteries 5. In-house load (load) 6 Remote controller (reception area) 7. Wireless Communication Department (Reception Department) 10 Power Conditioner 12 AC / DC inverter 13 Controller

Claims

1. an on-board storage battery mounted on the vehicle; a stationary storage battery connected to the vehicle-mounted storage battery via a DC bus; Equipped with a power conditioner, The power conditioner comprises: an AC / DC inverter provided between the DC bus and a load connected to a system power supply; a controller that controls charging and discharging of the in-vehicle storage battery and the stationary storage battery based on charge / discharge mode settings of the in-vehicle storage battery and the stationary storage battery and power consumption of the load; The controller controls the power input to the power conditioner so that the power is charged only to the stationary storage battery according to a predetermined setting. Power management system.

2. 2. The power management system according to claim 1, a receiving unit that receives user setting information indicating a priority of charging and discharging the in-vehicle storage battery and the stationary storage battery set by a user; The predetermined setting is a setting that instructs the stationary storage battery accepted by the accepting unit to be a charging target. Power management system.

3. 2. The power management system according to claim 1, Further comprising a solar panel; the power conditioner further includes a solar cell DC / DC converter that converts an output voltage of the solar cell panel into a predetermined voltage and outputs the voltage to the DC bus; When the predetermined setting is made, the controller controls the power input from the solar cell panel to the power conditioner so that the power is charged only to the stationary storage battery. Power management system.

4. an on-board storage battery mounted on the vehicle; a stationary storage battery connected to the vehicle-mounted storage battery via a DC bus; Equipped with a power conditioner, The power conditioner comprises: an AC / DC inverter provided between the DC bus and a load connected to a system power supply; a controller that controls charging and discharging of the in-vehicle storage battery and the stationary storage battery based on charge / discharge mode settings of the in-vehicle storage battery and the stationary storage battery and power consumption of the load; The controller sets a charging / discharging ratio of the stationary storage battery and the vehicle-mounted storage battery according to a predetermined setting, and performs charging / discharging of the stationary storage battery and the vehicle-mounted storage battery at the set ratio. Power management system.

5. 5. The power management system according to claim 4, a receiving unit that receives user setting information indicating a priority of charging and discharging the in-vehicle storage battery and the stationary storage battery set by a user; The predetermined setting is a setting that instructs the stationary storage battery accepted by the accepting unit to be a charging target. Power management system.

6. 5. The power management system according to claim 4, Further comprising a solar panel; the power conditioner further includes a solar cell DC / DC converter that converts an output voltage of the solar cell panel into a predetermined voltage and outputs the voltage to the DC bus; When the predetermined setting is made, the controller controls the power input from the solar cell panel to the power conditioner so that the power is charged only to the stationary storage battery. Power management system.

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