Power management system and power management method

Abstract

To provide a power management system which can more suitably control a collective housing in which a solar panel and a battery are provided.SOLUTION: A power management system 1 comprises a solar panel 43, a plurality of batteries 42, a plurality of chargers 41, and a controller 45. The solar panel 43 is provided in a collective housing. The plurality of batteries 42 are provided in the collective housing, and can receive power from the solar panel 43. The plurality of chargers 41 are provided in a parking lot of the collective housing, and can receive power from the solar panel 43 or the plurality of batteries 42. The controller 45 controls the plurality of batteries 42 and the plurality of chargers 41. The controller 45 performs control, on the basis of each charge state of the plurality of batteries 42, and the charge state of a vehicle connected to each of the plurality of chargers 41.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a power management system and a power management method, and more particularly to a power management system and a power management method for an apartment building equipped with solar panels and a storage battery. [Background technology]

[0002] A system that combines multiple homes, multiple chargers for electric vehicles, a portable power supply device, and a vehicle is known (for example, Patent Document 1). In the power supply management system of Patent Document 1, electricity is lent between each resident of the multiple homes via a storage battery. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-92443 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when a storage battery and a vehicle are combined in an apartment building equipped with solar panels, control is required to effectively utilize the power generated by the solar panels.

[0005] An object of the present disclosure is to provide a power management system and a power management method that are capable of performing more suitable control in an apartment building equipped with solar panels and storage batteries. [Means for solving the problem]

[0006] A power management system according to one aspect of the present disclosure includes a solar panel, a plurality of storage batteries, a plurality of chargers, and a control device. The solar panel is provided in an apartment building. The plurality of storage batteries are provided in the apartment building and are capable of receiving power from the solar panel. The plurality of chargers are provided in a parking lot of the apartment building and are capable of receiving power from the solar panel or the plurality of storage batteries. The control device controls the plurality of storage batteries and the plurality of chargers. The control device performs the control based on the charging state of each of the plurality of storage batteries and the charging state of a vehicle connected to each of the plurality of chargers.

[0007] A power management method according to one aspect of the present disclosure is a power management method for an apartment building. The apartment building includes a solar panel, a plurality of storage batteries, and a plurality of chargers. The plurality of storage batteries are capable of receiving power from the solar panel. The plurality of chargers are provided in a parking lot and are capable of receiving power from the solar panel or the plurality of chargers. The method includes a control step of controlling the plurality of storage batteries and the plurality of chargers based on a charging state of each of the plurality of storage batteries and a charging state of a vehicle connected to each of the plurality of chargers. The control step is executed by one or more processors. Effect of the Invention

[0008] According to an aspect of the present disclosure, a power management system and a power management method enable more suitable control in an apartment building equipped with solar panels and storage batteries. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a block diagram of a power management system according to an embodiment. [Diagram 2] Fig. 2A is a schematic diagram of the second floor of an apartment house having the above power management system. Fig. 2B is a schematic diagram of the first floor of an apartment house having the above power management system. [Diagram 3] FIG. 3 is a schematic diagram of an apartment building in which the above-mentioned power management system is used. [Figure 4] FIG. 4 is a flowchart showing an operation mode selection operation of the power management system. [Diagram 5] FIG. 5 is a flowchart showing an operation of the power management system in the first mode. [Figure 6] FIG. 6 is a flowchart showing the operation of the power management system in the second mode. [Figure 7] FIG. 7 is a flowchart showing an operation of the power management system in the third mode. [Figure 8] FIG. 8 is a plan view of the first floor of an apartment building having a power management system according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the power management system according to the embodiment will be described in detail with reference to the drawings. However, each figure described in the following embodiment is a schematic diagram, and the ratio of the size and thickness of each component does not necessarily reflect the actual dimensional ratio.

[0011] (Embodiment) (1) Overview The power management system 1 (see Figure 1) is a system that manages the charging and discharging of multiple storage batteries 42 and charging by multiple chargers 41 in, for example, an apartment building 2 (see Figures 2A to 3) in which a solar panel 43 and multiple storage batteries 42 are installed.

[0012] The power management system 1 controls the charging and discharging of a plurality of storage batteries 42 and the charging using a plurality of chargers 41 in order to effectively utilize the power output by the solar panel 43.

[0013] (2) Building composition The power management system 1 is installed in an apartment building 2 (see Figs. 2A to 3). As shown in Figs. 2A, 2B, and 3, the apartment building 2 has a plurality of sections 3. The plurality of sections 3 include a plurality of residential sections 31 and a parking area 32. The apartment building 2 is, for example, a two-story low-rise apartment building. A low-rise apartment building refers to an apartment building that is a low-rise residence. A low-rise residence is a residence that is a low-rise structure that is lower than mid-rise and high-rise buildings, and generally refers to a three-story, two-story, or one-story (single-story) building.

[0014] The apartment building 2 has four living areas 31 on the second floor. Each of the living areas 31 is, for example, a space for one or more people to live in. The apartment building 2 also has, for example, one parking lot 32 on the first floor, as shown in Figs. 2B and 3. The parking lot 32 is, for example, a so-called inner garage that is separated from the outside of the apartment building 2 by a wall and a shutter of the apartment building 2. The parking lot 32 includes multiple parking spaces 33 (four in Fig. 2B).

[0015] (3) System Configuration As shown in Fig. 1, the power management system 1 includes a plurality of storage batteries 42, a plurality of chargers 41, one or more solar panels 43, an air conditioner 44, and a control device 45. The power management system 1 further includes a distribution board 48, a junction box 46, and a power conditioner 47. The plurality of storage batteries 42, the plurality of chargers 41, the one or more solar panels 43, the air conditioner 44, the control device 45, the junction box 46, the power conditioner 47, and the distribution board 48 configure the power facility 4 (see Fig. 3). Note that Fig. 1 shows each of the plurality of storage batteries 42, the plurality of chargers 41, and the one or more solar panels 43, and omits the junction box 46 and the power conditioner 47. In Fig. 1, the solid arrow indicates the direction of power supply, and the dashed arrow indicates the direction of information transmission.

[0016] The multiple chargers 41 are provided in a parking lot 32 of the apartment complex 2. More specifically, the multiple chargers 41 are provided in a one-to-one correspondence with the multiple parking spaces 33 in the parking lot 32. Each of the multiple chargers 41 is connected to a distribution board 48, and has a connector connectable to a vehicle 6. The connector of each of the multiple chargers 41 includes, for example, a pair of power supply terminals and a communication terminal for acquiring the charging state of the vehicle 6.

[0017] Each of the chargers 41 charges the vehicle 6 parked in the parking space 33 corresponding to the charger 41. The vehicle 6 is, for example, an electric vehicle, an electric two-wheeler, or the like. Each of the chargers 41 acquires the charging state of the vehicle 6 and notifies the control device 45. When the vehicle 6 is not connected, each of the chargers 41 notifies the control device 45 that the vehicle 6 is not connected, instead of the charging state of the vehicle 6. Each of the chargers 41 receives power used to charge the vehicle 6 from one or more solar panels 43, the multiple storage batteries 42, or the power system 5 via the distribution board 48. That is, the multiple chargers 41 can receive power from one or more solar panels 43 or the multiple storage batteries 42. Furthermore, the multiple chargers 41 can receive power from the power system 5.

[0018] A plurality of (four in FIG. 2B ) storage batteries 42 are provided in the apartment house 2. More specifically, the plurality of storage batteries 42 are provided in the parking lot 32 of the apartment house 2. The number of storage batteries 42 is not limited to four, and may be three or less, or five or more. Each of the plurality of storage batteries 42 includes a secondary battery that can be repeatedly charged and discharged, such as a lithium ion battery or an all-solid-state battery. More specifically, the plurality of storage batteries 42 includes a secondary battery and a charge / discharge circuit. The charge / discharge circuit converts AC power received from the power conditioner 47 or the power system 5 via the distribution board 48 into DC power of a voltage and current suitable for charging the secondary battery, and supplies the DC power to the secondary battery. In addition, the charge / discharge circuit converts DC power output from the secondary battery into AC power having the same voltage, frequency, and phase as the power system 5, and outputs the converted power to the distribution board 48. In addition, the charge / discharge circuit manages the charging state, temperature, and the like of the secondary battery.

[0019] Each of the multiple storage batteries 42 is charged using one or more solar panels 43 or the power system 5, and outputs power to the multiple chargers 41. Each of the multiple storage batteries 42 notifies the control device 45 of the charging state of the storage battery 42. When being charged, each of the multiple storage batteries 42 receives power from one or more solar panels 43 or the power system 5 via the distribution board 48. That is, the multiple storage batteries 42 can receive power from one or more solar panels 43. Also, the multiple storage batteries 42 can receive power from the power system 5. When being discharged, each of the multiple storage batteries 42 outputs power to one or more of the multiple chargers 41 or the air conditioner 44 via the distribution board 48.

[0020] One or more (two in FIG. 3 ) solar panels 43 are provided in the apartment building 2. More specifically, the two solar panels 43 are installed on the roof of the apartment building 2. The one or more solar panels 43 are solar cells that receive light and generate electricity.

[0021] The one or more solar panels 43 are connected to a power conditioner 47 via a junction box 46. In addition, the one or more solar panels 43 notify the control device 45 of the amount of power generation via the power conditioner 47.

[0022] The air conditioner 44 is installed in the same space as the multiple storage batteries 42. More specifically, the air conditioner 44 is installed in the parking lot 32 as shown in FIG. 2B. The air conditioner 44 receives power from one or more solar panels 43 or the multiple storage batteries 42 via a distribution board 48, and controls the temperature of the space in which the multiple storage batteries 42 are installed. More specifically, the air conditioner 44 controls the room temperature of the parking lot 32 so that the temperatures of the multiple storage batteries 42 become suitable for the operation of the storage batteries 42. Note that the air conditioner 44 may receive power from the power system 5 via the distribution board 48, and control the temperature of the space in which the multiple storage batteries 42 are installed.

[0023] The power conditioner 47 converts the DC power received from one or more solar panels 43 into AC power having the same voltage, frequency, and phase as the power grid 5, and outputs the AC power to the distribution board .

[0024] The distribution board 48, under the control of the control device 45, supplies each of the multiple chargers 41 with power received from any one of the one or more solar panels 43, the multiple storage batteries 42, and the power system 5. Also, under the control of the control device 45, the distribution board 48 supplies the air conditioner 44 with power received from any one of the one or more solar panels 43 and the multiple storage batteries 42. Also, under the control of the control device 45, the distribution board 48 supplies the power received from any one of the one or more solar panels 43 and the power system 5 to the multiple storage batteries 42 when charging the multiple storage batteries 42.

[0025] The control device 45 controls the operation of the multiple chargers 41, the multiple storage batteries 42, and the air conditioner 44 based on the power generation state of the solar panel 43, the charging state of the multiple storage batteries 42, and the charging state of the vehicle 6 connected to each of the multiple chargers 41.

[0026] The control device 45 is, for example, a computer having a processor. More specifically, the control device 45 is configured by, for example, a computer system having a CPU (Central Processing Unit) and a memory. The computer system realizes the functions of the control device 45 by executing a program stored in the memory with the CPU. The program may be recorded in advance in the memory of the computer system, may be provided by recording it on a recording medium such as a memory card, or may be provided via an electric communication line such as the Internet.

[0027] (4) Operation The operation of the power management system 1 will now be described in more detail.

[0028] (4.1) Mode Selection As shown in Fig. 4, the power management system 1 selects an operation mode based on the charging state of the vehicle 6 connected to each of the multiple chargers 41 and the charging state of the multiple storage batteries 42. The operation modes include a first mode, a second mode, and a third mode. The first mode is an operation mode in which the vehicle 6 is charged preferentially. The second mode is an operation mode in which the multiple storage batteries 42 are charged preferentially. The third mode is an operation mode in which the air conditioner 44 is operated using one or more solar panels 43 or the multiple storage batteries 42.

[0029] The power management system 1 determines whether or not the vehicle 6 is connected to any one or more of the multiple chargers 41 (step S1). More specifically, the control device 45 of the power management system 1 determines whether or not the vehicle 6 is connected to each of the multiple chargers 41 based on the state of the vehicle 6 notified from each of the multiple chargers 41.

[0030] When the vehicle 6 is connected to any one or more of the chargers 41 (Yes in step S1), the power management system 1 determines whether or not there is a vehicle 6 whose charging state is the first state (step S2). Here, "the charging state of the vehicle 6 is the first state" means that the charging amount of the vehicle 6 is less than a first threshold. The charging amount of the vehicle 6 is, for example, the SOC (state of charge) of a storage battery for driving the vehicle 6, and the first threshold is, for example, 100%. The control device 45 of the power management system 1 determines the charging state of the vehicle 6 based on the state of the vehicle 6 notified from each of the multiple chargers 41. When the vehicle 6 whose charging state is the first state exists (Yes in step S2), the power management system 1 operates in the first mode (step S10). That is, when the charging state of the vehicle 6 connected to any one of the multiple chargers 41 is the first state, the power management system 1 performs control so as to preferentially charge the vehicle 6.

[0031] On the other hand, when the vehicle 6 is not connected to any of the chargers 41 (No in step S1), the power management system 1 determines whether or not a storage battery 42 whose state of charge is the second state is present (step S3). Also, when the vehicle 6 whose state of charge is the first state is not present (No in step S2), the power management system 1 determines whether or not a storage battery 42 whose state of charge is the second state is present (step S3). Here, "the state of charge of the storage battery 42 is the second state" means that the amount of charge of the storage battery 42 is less than a second threshold. The amount of charge of the storage battery 42 is, for example, the SOC of a secondary battery included in the storage battery 42, and the second threshold is, for example, 50%. When a storage battery 42 whose state of charge is the second state is present (Yes in step S3), the power management system 1 operates in the second mode (step S20). In other words, the power management system 1 controls the charging of the multiple storage batteries 42 preferentially when the charging states of one or more vehicles 6 connected to the multiple chargers 41 are not in a first state in which the charged amount is less than a first threshold, and when the charging states of each of the multiple storage batteries 42 are in a second state in which the charged amount is less than a second threshold.

[0032] On the other hand, if there is no storage battery 42 whose state of charge is the second state (No in step S3), the power management system operates in the third mode (step S30). That is, the power management system 1 operates the air conditioner 44 using one or more solar panels 43 or the multiple storage batteries 42 when none of the states of charge of one or more vehicles 6 connected to the multiple chargers 41 is the first state in which the amount of charge is less than a first threshold, and when the state of charge of each of the multiple storage batteries 42 is not the second state in which the amount of charge is less than a second threshold.

[0033] (4.2) First mode The operation of the power management system 1 in the first mode will be described in detail below with reference to the flowchart in Fig. 5. In the first mode, the power management system 1 prioritizes charging of the vehicle 6. In addition, in the first mode, the power management system 1 selects the power used by the multiple chargers 41 to charge the vehicle 6 from the solar panel 43, the multiple storage batteries 42, and the power grid 5, in that order.

[0034] In the first mode, the power management system 1 determines whether the output of the solar panel 43 is sufficient (step S11). The control device 45 of the power management system 1 acquires the amount of power generated by the solar panel 43 from the power conditioner 47, and determines whether the power output by the solar panel 43 can be used to charge the vehicle 6. For example, if the power conditioner 47 outputs AC power, the control device 45 determines that the output of the solar panel 43 is sufficient. If the output of the solar panel 43 is sufficient (Yes in step S11), the power management system 1 charges the vehicle 6 using the solar panel 43 (step S12). More specifically, the control device 45 operates the distribution board 48 so that the power output from the power conditioner 47 is supplied to the charger 41 to which the vehicle 6 is connected.

[0035] On the other hand, if the output of the solar panel 43 is not sufficient (No in step S11), the power management system 1 judges whether the remaining charge of the storage battery 42 is sufficient (step S13). The control device 45 of the power management system 1 acquires the charge state of each of the multiple storage batteries 42 and judges whether the multiple storage batteries 42 can be used to charge the vehicle 6. For example, if the SOC of the secondary battery included in each of the multiple storage batteries 42 is not 0%, the control device 45 judges that the remaining charge of the storage battery 42 is sufficient. If the remaining charge of the storage battery 42 is sufficient (Yes in step S13), the power management system 1 charges the vehicle 6 using the multiple storage batteries 42 (step S14). More specifically, the control device 45 operates the distribution board 48 so that the power output from the multiple storage batteries 42 is supplied to the charger 41 to which the vehicle 6 is connected.

[0036] On the other hand, if the remaining charge of the storage battery 42 is insufficient (No in step S13), the power management system 1 charges the vehicle 6 using the power system 5 (step S15). More specifically, the control device 45 operates the distribution board 48 so that power output from the power system 5 is supplied to the charger 41 to which the vehicle 6 is connected.

[0037] That is, the control device 45 selects the solar panel 43, the multiple storage batteries 42, and the power grid 5 in that order as the power supply source for the multiple chargers 41. In other words, the control device 45 controls the supply of power generated by the solar panel 43 to the multiple chargers 41 with priority over power received from the power grid 5.

[0038] After the start of step S12, step S14, or step S15, the power management system 1 determines whether the vehicle 6 is in a fully charged state (step S16). Step S16 is performed, for example, a predetermined time, for example, 10 minutes, after step S11 is performed. In step S16, the control device 45 of the power management system 1 determines whether the vehicle 6 is in a fully charged state based on the charging state of the vehicle 6 notified from each of the multiple chargers 41. The fully charged state of the vehicle 6 means, for example, a state in which the SOC of the driving battery of the vehicle 6 is 100%. If the vehicle 6 is in a fully charged state (Yes in step S16), the power management system 1 transitions to a second mode (step S20) described later since it is no longer necessary to charge the vehicle 6. On the other hand, if the vehicle 6 is not in a fully charged state (No in step S16), the process returns to step S11 to reselect a power source for charging the vehicle 6 based on the power generation state of one or more solar panels 43 and the charging state of the multiple storage batteries 42.

[0039] In the above description, the power management system 1 determines whether the vehicle 6 is fully charged in step S16 after a predetermined time from the execution of step S11, and starts step S11 again if the vehicle 6 is not fully charged (No in step S16). However, for example, the power management system 1 may repeat step S11 at predetermined time intervals, and transition to the second mode when the charger 41 notifies the vehicle 6 that it is fully charged. Also, for example, the power management system 1 may immediately execute step S13 when the output of the solar panel 43 becomes insufficient during execution of step S12 in which the vehicle 6 is charged using the solar panel 43. Also, for example, the power management system 1 may immediately execute step S12 when the output of the solar panel 43 becomes sufficient during execution of step S14 or S15.

[0040] (4.3) Second mode The operation of the power management system 1 in the second mode will be described in detail below with reference to the flowchart in Fig. 6. In the second mode, the power management system 1 gives priority to charging the multiple storage batteries 42. In addition, in the second mode, the power management system 1 selects the power to be used for charging the multiple storage batteries 42 from the solar panel 43 and the power grid 5, in that order.

[0041] In the second mode, the power management system 1 determines whether the output of the solar panel 43 is sufficient (step S21). For example, if the power conditioner 47 is outputting AC power, the control device 45 of the power management system 1 determines that the output of the solar panel 43 is sufficient. If the output of the solar panel 43 is sufficient (Yes in step S21), the power management system 1 charges the multiple storage batteries 42 using the solar panel 43 (step S22). More specifically, the control device 45 operates the distribution board 48 so that the power output from the power conditioner 47 is supplied to the multiple storage batteries 42.

[0042] On the other hand, if the output of the solar panel 43 is not sufficient (No in step S21), the power management system 1 determines whether the remaining charge of the storage battery 42 is equal to or greater than a reference level (step S23). "The remaining charge of the storage battery 42 is equal to or greater than a reference level" means, for example, that the SOC of the secondary battery included in each of the multiple storage batteries 42 is 50% or greater. If the remaining charge of the storage battery 42 is sufficient (Yes in step S23), the power management system 1 does not charge the multiple storage batteries 42. As a result, in the power management system 1, when the remaining charge of the multiple storage batteries 42 is sufficient, only the solar panel 43 is used to charge the multiple storage batteries 42.

[0043] On the other hand, if the remaining charge of the storage batteries 42 is insufficient (No in step S23), the power management system 1 charges the multiple storage batteries 42 using the power system 5 (step S24). More specifically, the control device 45 operates the distribution board 48 so that power output from the power system 5 is supplied to the multiple storage batteries 42.

[0044] That is, the control device 45 preferentially selects the solar panel 43 over the power grid 5 as a supply source for supplying power to the multiple storage batteries 42. Furthermore, when the remaining charge of the multiple storage batteries 42 is equal to or greater than a reference level, the control device 45 does not use the power of the power grid 5 to charge the multiple storage batteries 42.

[0045] After executing step S22 or step S23, the power management system 1 determines whether or not the vehicle 6 is connected to any one or more of the multiple chargers 41 (step S25). When the vehicle 6 is connected to any one or more of the multiple chargers 41 (Yes in step S25), the power management system 1 transitions to the first mode (step S10) in order to charge the vehicle 6. Here, "when the vehicle 6 is connected to any one or more of the multiple chargers 41" refers to a state in which a new vehicle 6 is connected to any one or more of the multiple chargers 41, or a different vehicle 6 is connected after the vehicle 6 is disconnected. In other words, "when the vehicle 6 is connected to any one or more of the multiple chargers 41" does not include a state in which a vehicle 6 that has been completely charged remains connected.

[0046] If the vehicle 6 is not connected to any of the multiple chargers 41 (No in step S25), the power management system 1 determines whether the multiple storage batteries 42 are in a fully charged state (step S26). Step S26 is performed, for example, a predetermined time, for example, 10 minutes, after step S21 is executed. In step S26, the control device 45 of the power management system 1 determines whether the multiple storage batteries 42 are in a fully charged state. The fully charged state of the storage battery 42 means, for example, a state in which the SOC of the secondary battery included in the storage battery 42 is 100%. If the storage battery 42 is in a fully charged state (Yes in step S26), the power management system 1 does not need to charge either the vehicle 6 or the multiple storage batteries 42, and therefore transitions to a third mode (step S30) described below. On the other hand, if the multiple storage batteries 42 are not fully charged (No in step S26), the process returns to step S21 to reselect a power source for charging the multiple storage batteries 42 based on the power generation state of one or more solar panels 43 and the charging state of the multiple storage batteries 42.

[0047] In the above description, the power management system 1 determines whether the multiple storage batteries 42 are fully charged in step S26 after a predetermined time has elapsed since step S21 was executed, and starts step S21 if the multiple storage batteries 42 are not fully charged (No in step S26). However, for example, the power management system 1 may repeat step S21 at predetermined time intervals, and transition to the third mode when the multiple storage batteries 42 notify the multiple storage batteries 42 that they are fully charged, or transition to the first mode when any of the multiple chargers 41 notifies the connection of the vehicle 6. Also, for example, the power management system 1 may immediately execute step S23 when the output of the solar panel 43 becomes insufficient during execution of step S22 in which the multiple storage batteries are charged using the solar panel 43. Also, for example, the power management system 1 may immediately execute step S22 when the output of the solar panel 43 becomes sufficient during execution of step S24 or after No in step S23.

[0048] (4.4) Third mode Hereinafter, the operation of the power management system 1 in the third mode will be described in detail with reference to the flowchart of Fig. 7. In the third mode, the air conditioner 44 controls the space in which the multiple storage batteries 42 are installed.

[0049] In the third mode, the power management system 1 determines whether the room temperature of the parking lot 32 in which the multiple storage batteries 42 are installed is within a reference range (step S31). The control device 45 of the power management system 1 acquires the room temperature of the space in which the storage batteries 42 are installed, for example, from the multiple storage batteries 42. The reference range is, for example, 15°C or higher and 30°C or lower. If the room temperature of the parking lot 32 is within the reference range (Yes in step S31), the power management system 1 performs a mode selection operation (step S40). The mode selection operation is the same as the operations in steps S1 to S3 shown in FIG. 4, and therefore a detailed description will be omitted.

[0050] If the room temperature of the parking lot 32 is not within the reference range (No in step S31), the control device 45 of the power management system 1 determines whether the output of the solar panel 43 is sufficient (step S32). For example, if the power conditioner 47 is outputting AC power, the control device 45 of the power management system 1 determines that the output of the solar panel 43 is sufficient. If the output of the solar panel 43 is sufficient (Yes in step S32), the power management system 1 operates the air conditioner 44 using the solar panel 43 (step S33). More specifically, the control device 45 operates the distribution board 48 so that the power output from the power conditioner 47 is supplied to the air conditioner 44. The air conditioner 44 performs a cooling operation or a heating operation so as to bring the room temperature of the parking lot 32 closer to the reference range.

[0051] On the other hand, if the output of the solar panel 43 is insufficient (No in step S32), the power management system 1 judges whether or not the remaining charge of the storage battery 42 is equal to or greater than a reference level (step S34). "The remaining charge of the storage battery 42 is equal to or greater than a reference level" means, for example, that the SOC of the secondary battery included in each of the multiple storage batteries 42 is 50% or greater. If the remaining charge of the storage battery 42 is sufficient (Yes in step S34), the power management system 1 operates the air conditioner 44 using the multiple storage batteries 42 (step S35). On the other hand, if the remaining charge of the storage battery 42 is not sufficient (No in step S34), the power management system 1 does not operate the air conditioner 44. That is, if the output of the solar panel 43 is insufficient and the remaining charge of the multiple storage batteries 42 is not sufficient, the power management system 1 does not operate the air conditioner 44.

[0052] The power management system 1 determines whether or not the vehicle 6 is connected to one or more of the multiple chargers 41 (step S36). If the vehicle 6 is connected to one or more of the multiple chargers 41 (Yes in step S36), the power management system 1 transitions to the first mode (step S10) to charge the vehicle 6.

[0053] When the vehicle 6 is not connected to any of the chargers 41 (No in step S36), the power management system 1 returns to step S31.

[0054] In the above description, the power management system 1 returns to step S31 if the answer is No in step S36. However, instead of returning to step S31, the power management system 1 may transition to the second mode (step S20).

[0055] (4) Effects The power management system 1 according to the embodiment includes a solar panel 43, a plurality of storage batteries 42, a plurality of chargers 41, and a control device 45. The solar panel 43 is provided in an apartment building 2. The plurality of storage batteries 42 are provided in the apartment building 2 and can receive power from the solar panel 43. The plurality of chargers 41 are provided in a parking lot 32 of the apartment building 2 and can receive power from the solar panel 43 or the plurality of storage batteries 42. The control device 45 controls the plurality of storage batteries 42 and the plurality of chargers 41. The control device 45 performs control based on the charging state of each of the plurality of storage batteries 42 and the charging state of a vehicle 6 connected to each of the plurality of chargers 41.

[0056] The power management method according to the embodiment is a power management method for an apartment building 2. The apartment building 2 includes a solar panel 43, multiple storage batteries 42, and multiple chargers 41. The multiple storage batteries 42 are capable of receiving power from the solar panel 43. The multiple chargers 41 are provided in a parking lot, and are capable of receiving power from the solar panel 43 or the multiple storage batteries 42. The power management method includes a control step of controlling the multiple storage batteries 42 and the multiple chargers 41 based on the charging state of each of the multiple storage batteries 42 and the charging state of a vehicle 6 connected to each of the multiple chargers 41. The control step is executed by one or more processors.

[0057] As a result, in the power management system 1 or the power management method, for example, surplus power output from the solar panel 43 can be stored in the multiple storage batteries 42, and the power can be used to charge the vehicle 6 without waste.

[0058] Moreover, in the power management system 1 according to the embodiment, the multiple storage batteries 42 and the multiple chargers 41 are configured to be able to receive power from the power grid 5. The control device 45 performs control so that power generated by the solar panel 43 is supplied to the multiple chargers 41 or the multiple storage batteries 42 in priority to power received from the power grid 5. This makes it possible for the power management system 1 to use the power output from the solar panel 43 without waste and to reduce the amount of power received from the power grid 5, for example.

[0059] Furthermore, in the power management system 1 according to the embodiment, when the charging state of the vehicle 6 connected to any one of the multiple chargers 41 is a first state in which the amount of charge is less than a first threshold, the control device 45 performs control so as to preferentially charge the vehicle 6. As a result, in the power management system 1, when charging of the vehicle 6 is required, charging of the vehicle 6 is prioritized over charging of the multiple storage batteries 42, thereby making it possible to perform control so as not to extend the time required for charging the vehicle 6.

[0060] Furthermore, in the power management system 1 according to the embodiment, the control device 45 performs control so as to preferentially charge the multiple storage batteries 42 when the charging states of one or more vehicles 6 connected to the multiple chargers 41 are not in a first state in which the charge amount is less than a first threshold value, and when the charging states of each of the multiple storage batteries 42 are in a second state in which the charge amount is less than a second threshold value. As a result, in the power management system 1, when charging of the vehicle 6 is not required, the multiple storage batteries 42 are charged using power output from the solar panel 43. Therefore, for example, when the power output from the solar panel 43 cannot be used to charge the vehicle 6, the power management system 1 can charge the vehicle 6 using power from the multiple storage batteries 42.

[0061] The power management system 1 according to the embodiment further includes an air conditioner 44. The air conditioner 44 is installed in the same space as the multiple storage batteries 42. When the charging states of one or more vehicles 6 connected to the multiple chargers 41 are not in a first state in which the amount of charge is less than a first threshold, and when the charging states of each of the multiple storage batteries 42 are not in a second state in which the amount of charge is less than a second threshold, the control device 45 operates the air conditioner 44 using the solar panel 43 or the multiple storage batteries 42. As a result, in the power management system 1, when neither charging of the vehicle 6 nor charging of the multiple storage batteries 42 is required, the air conditioner 44 is operated to control the temperature of the space in which the multiple storage batteries 42 are installed. Therefore, in the power management system 1, deterioration of the multiple storage batteries 42 can be reduced and the life of the multiple storage batteries 42 can be extended.

[0062] (Modification) (1) In the power management system 1 according to the embodiment, the air conditioner 44 controls the room temperature of the entire parking lot 32 in which the multiple storage batteries 42 are arranged. However, for example, as shown in FIG. 8, the air conditioner 44 may also control the room temperature of an area 34 of the parking lot 32 in which the multiple storage batteries 42 are arranged. For example, a partition exists between the area 34 and the multiple parking spaces 33. With this configuration, the range in which the air conditioner 44 controls the room temperature can be narrowed, so that the power consumption of the air conditioner 44 can be reduced and the room temperature around the multiple storage batteries 42 can be efficiently controlled.

[0063] (2) In the power management system 1 according to the embodiment, the multiple storage batteries 42 and the multiple chargers 41 are not particularly associated with each other, but the multiple storage batteries 42 and the multiple chargers 41 may be associated with each other. For example, each of the multiple chargers 41 may be able to receive power only from a specific storage battery 42 among the multiple storage batteries 42. This reduces unfairness among users of the multiple parking spaces 33, for example, when a user of the vehicle 6 who uses the vehicle 6 frequently or consumes a large amount of power of the vehicle 6 has priority in using the multiple storage batteries 42.

[0064] (3) In the power management system 1 according to the embodiment, each of the multiple storage batteries 42 is charged using the solar panel 43 or the power grid 5, but power may be interchangeable between the multiple storage batteries 42. Specifically, the multiple storage batteries 42 include a first storage battery and a second storage battery, and the first storage battery and the second storage battery are mutually chargeable. This reduces the variation in charge level between the multiple storage batteries 42, and extends the lifespan of the multiple storage batteries 42. Furthermore, when the multiple storage batteries 42 correspond to the multiple chargers 41, power interchange is possible.

[0065] (4) In the power management system 1 according to the embodiment, the control device 45 may be a control circuit built into the distribution board 48. Also, for example, the control device 45 may be a control circuit built into the power conditioner 47. Furthermore, the power conditioner 47 may incorporate the function of the distribution board 48, or may incorporate the function of a charging / discharging circuit for the multiple storage batteries 42.

[0066] (5) In the power management system 1 according to the embodiment, the criteria for "whether the output of the solar panel 43 is sufficient" in each of steps S11, S21, and S32 are merely examples, and for example, in step S11, it may be determined that "the output of the solar panel 43 is sufficient" when the output current of the power conditioner 47 is equal to or greater than a reference current. Also, the criteria for "whether the output of the solar panel 43 is sufficient" in each of steps S11, S21, and S32 may be different from one another.

[0067] Similarly, the criteria for "whether the remaining charge of the storage battery 42 is sufficient" in each of steps S13, S23, and S34 are also illustrative. For example, in step S34, if the SOC of the secondary battery of the storage battery 42 is 80% or higher, it may be determined that "the remaining charge of the storage battery 42 is sufficient."

[0068] (6) In the power management system 1 according to the first embodiment, in the third mode, the air conditioner 44 operates by receiving power from the solar panel 43 or the multiple storage batteries 42, but the air conditioner 44 may also operate by receiving power from the power grid 5. Specifically, if the answer is No in step S34, the power management system 1 operates the air conditioner 44 with power from the power grid 5. This makes it possible to operate the air conditioner 44 when neither the output of the solar panel 43 nor the remaining capacity of the multiple storage batteries 42 is sufficient. Therefore, it becomes possible to maintain the temperature of the multiple storage batteries 42 within a reference range.

[0069] (7) In the power management system 1 according to the embodiment, one apartment building 2 has one power management system 1, but one power management system 1 may be installed across multiple apartment buildings 2. Also, multiple power management systems 1 may be installed in one apartment building 2, and in this case, multiple control devices 45 included in the multiple power management systems 1 installed in the same apartment building 2 may be realized by a single piece of hardware.

[0070] (Aspect) The power management system (1) according to the first aspect includes a solar panel (43), a plurality of storage batteries (42), a plurality of chargers (41), and a control device (45). The solar panel (43) is provided in an apartment building (2). The plurality of storage batteries (42) are provided in the apartment building (2) and can receive power from the solar panel (43). The plurality of chargers (41) are provided in a parking lot (32) of the apartment building (2) and can receive power from the solar panel (43) or the plurality of storage batteries (42). The control device (45) controls the plurality of storage batteries (42) and the plurality of chargers (41). The control device (45) performs control based on the state of charge of each of the plurality of storage batteries (42) and the state of charge of a vehicle (6) connected to each of the plurality of chargers (41).

[0071] According to the power management system (1) according to the above aspect, for example, surplus power output from the solar panel (43) can be stored in the multiple storage batteries (42) and used to charge the vehicle (6) without waste.

[0072] In the power management system (1) according to the second aspect, in the first aspect, the multiple storage batteries (42) and the multiple chargers (41) are configured to be able to receive power from the power grid (5). The control device (45) performs control so that power generated by the solar panel (43) is supplied to the multiple chargers (41) or the multiple storage batteries (42) with priority over power received from the power grid (5).

[0073] According to the power management system (1) of the above aspect, it is possible to utilize the power output from the solar panel (43) without waste and to reduce the amount of power received from the power grid (5).

[0074] In addition, in the power management system (1) according to the third aspect, in the first or second aspect, the control device (45) performs control so as to preferentially charge the vehicle (6) when the charging state of the vehicle (6) connected to any one of the multiple chargers (41) is a first state in which the charged amount is less than a first threshold.

[0075] According to the power management system (1) of the above aspect, when charging of the vehicle (6) is required, charging of the vehicle (6) is prioritized over charging of the multiple storage batteries (42), thereby making it possible to control so as not to extend the time required for charging the vehicle (6).

[0076] In addition, in the power management system (1) according to the fourth aspect, in any of the first to third aspects, the control device (45) controls the charging of the multiple storage batteries (42) preferentially when the charging states of one or more vehicles (6) connected to the multiple chargers (41) are not a first state in which the amount of charge is less than a first threshold, and when the charging states of each of the multiple storage batteries (42) are a second state in which the amount of charge is less than a second threshold.

[0077] According to the power management system (1) of the above aspect, when charging of the vehicle (6) is not required, the power output from the solar panel (43) is used to charge the multiple storage batteries (42). Therefore, for example, when the power output from the solar panel (43) cannot be used to charge the vehicle (6), the power management system (1) can charge the vehicle (6) using the power of the multiple storage batteries (42).

[0078] Furthermore, the power management system (1) according to a fifth aspect is the power management system (1) according to any one of the first to fourth aspects, further including an air conditioner (44). The air conditioner (44) is installed in the same space as the multiple storage batteries (42). The control device (45) operates the air conditioner (44) using the solar panel (43) or the multiple storage batteries (42) when none of the charging states of the one or more vehicles (6) connected to the multiple chargers (41) is a first state in which the amount of charge is less than a first threshold, and when each of the multiple storage batteries (42) is not a second state in which the amount of charge is less than a second threshold.

[0079] According to the power management system (1) of the above aspect, when neither charging of the vehicle (6) nor charging of the multiple storage batteries (42) is required, the air conditioner (44) is operated to control the air temperature in the space in which the multiple storage batteries (42) are installed. Thus, the power management system (1) can reduce deterioration of the multiple storage batteries (42) and extend their lifespan.

[0080] In addition, in the power management system (1) according to a sixth aspect, in any of the first to fifth aspects, the control device (45) enables mutual charging between the first storage battery (42) and the second storage battery (42) included in the multiple storage batteries (42).

[0081] The power management system (1) according to the above aspect can reduce the variation in charge level among the multiple storage batteries (42) and extend the life of the multiple storage batteries (42). Furthermore, when the multiple storage batteries (42) correspond to the multiple chargers (41), power can be shared among them.

[0082] A power management method according to a seventh aspect is a power management method for an apartment house (2). The apartment house (2) includes a solar panel (43), a plurality of storage batteries (42), and a plurality of chargers (41). The plurality of storage batteries (42) are capable of receiving power from the solar panel (43). The plurality of chargers (41) are provided in a parking lot (32), and are capable of receiving power from the solar panel (43) or the plurality of storage batteries (42). The power management method includes a control step of controlling the plurality of storage batteries (42) and the plurality of chargers (41) based on a charging state of each of the plurality of storage batteries (42) and a charging state of a vehicle (6) connected to each of the plurality of chargers (41). The control step is executed by one or more processors.

[0083] According to the power management method of the above aspect, for example, surplus power output from the solar panel (43) can be stored in the multiple storage batteries (42) and used to charge the vehicle (6) without waste. [Explanation of symbols]

[0084] 1. Power Management System 2 Apartment complex 32 Parking 41 Charger 42 Storage battery 43 Solar Panels 44 Air conditioner 45 Control device 5 Power system 6 Vehicles

Claims

1. Solar panels installed in housing complexes, A plurality of storage batteries provided in the housing complex and capable of receiving power from the solar panels; a plurality of chargers provided in a parking lot of the housing complex and capable of receiving power from the solar panel or the plurality of storage batteries; A control device that controls the plurality of storage batteries and the plurality of chargers, the control device performs the control based on a charging state of each of the plurality of storage batteries and a charging state of a vehicle connected to each of the plurality of chargers. Power management system.

2. The plurality of storage batteries and the plurality of chargers are configured to be capable of receiving power from a power grid, The control device performs the control so that the power generated by the solar panel is supplied to the plurality of chargers or the plurality of storage batteries in priority to the power received from the power grid. The power management system of claim 1 .

3. the control device performs the control so as to preferentially charge the vehicle when a charging state of the vehicle connected to any one of the plurality of chargers is a first state in which a charged amount is less than a first threshold. The power management system of claim 1 .

4. the control device performs the control so as to preferentially charge the multiple storage batteries when the charging states of the one or more vehicles connected to the multiple chargers are not a first state in which the charged amount is less than a first threshold, and the charging states of each of the multiple storage batteries are a second state in which the charged amount is less than a second threshold. The power management system of claim 1 .

5. The system further includes an air conditioner installed in the same space as the plurality of storage batteries, the control device operates the air conditioner using the solar panel or the multiple storage batteries when none of the charging states of the one or more vehicles connected to the multiple chargers is a first state in which the amount of charge is less than a first threshold, and the charging state of each of the multiple storage batteries is not a second state in which the amount of charge is less than a second threshold. The power management system of claim 1 .

6. The control device enables mutual charging between a first storage battery and a second storage battery included in the plurality of storage batteries. The power management system of claim 1 .

7. A method for managing electricity in an apartment building, comprising: The housing complex comprises: Solar panels and A plurality of storage batteries capable of receiving power from the solar panel; a plurality of chargers provided in a parking lot and capable of receiving power from the solar panel or the plurality of storage batteries; a control step of controlling the plurality of storage batteries and the plurality of chargers based on a charging state of each of the plurality of storage batteries and a charging state of a vehicle connected to each of the plurality of chargers; the controlling step being executed by one or more processors; Power management methods.

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