JP7503389B2 - Power Supply System - Google Patents

Description

The present invention relates to a power supply system that continuously supplies power to a facility equipped with a stationary storage battery.

For example, communication buildings (including base stations) equipped with communication equipment are provided with backup power sources in the event of a commercial power outage. That is, large-scale communication buildings are equipped with stationary storage batteries (backup batteries) and engine generators, while small-scale communication buildings are equipped with stationary storage batteries. However, if the power outage continues for a long period of time, the capacity of the stationary storage batteries will run out and the small-scale communication buildings will be unable to use electricity.

For this reason, mobile power supply vehicles equipped with engine generators have traditionally been deployed in small telecommunications buildings to provide backup power, but when a power outage spreads over a wide area, there are not enough mobile power supply vehicles to provide backup power to all of the small telecommunications buildings. Also, owning many mobile power supply vehicles in preparation for power outages is very expensive and not realistic.

On the other hand, there is a known power management system that discharges storage batteries to supplement grid power during periods when power consumption in a factory is at its highest (see, for example, Patent Document 1). This system discharges the batteries of electric vehicles connected to the factory equipment and stationary storage batteries in the factory equipment when there is a possibility that power consumption will exceed a specified level, and supplements the grid power with that power.

JP 2012-196028 A

However, in the system of Patent Document 1, the electric vehicles used by factory employees to commute to work are targeted for discharge, and these electric vehicles are always parked in parking spaces during working hours, making it possible to discharge from any electric vehicle at any time. On the other hand, outside of working hours, the electric vehicles are not parked in parking spaces and cannot be discharged.

In contrast, in telecommunications buildings, hospitals, and the like, it is not known when and for how long each electric vehicle will be parked, and so it is not possible to use the system in Patent Document 1 to supply power. Furthermore, while the system in Patent Document 1 can predict the time periods when power consumption will exceed a predetermined power and can systematically discharge electric vehicles during these times, it is not possible to predict when, where, or for how long a commercial power outage will occur. Therefore, it is not possible to use the system in Patent Document 1 to supply backup power to telecommunications buildings and the like during a power outage.

Therefore, an object of the present invention is to provide a power supply system that can continuously supply power to a facility equipped with a stationary storage battery even if the stationary storage battery runs out of power.

In order to achieve the above object, the invention described in claim 1 is a power supply system comprising: a stationary storage battery arranged in a facility and discharging to a load in the event of a commercial power outage ; and a traction storage battery for movement, a plurality of mobile bodies in the facility capable of discharging from the traction storage battery to the load; and a management device that can communicate freely with the plurality of mobile bodies and is capable of acquiring the remaining capacity of the stationary storage battery and the traction storage battery and the position of the mobile bodies, wherein when the remaining capacity of the stationary storage battery during discharging reaches a predetermined value, the management device sends a discharge command to the mobile bodies that meets predetermined requirements based on the positions of the plurality of mobile bodies and the remaining capacity of each of the traction storage batteries to move to the facility and discharge from the traction storage battery to the load, and the predetermined value of the remaining capacity of the stationary storage battery is set to a capacity that can supply power to the load until power is supplied from the traction storage battery to the load .

According to this invention, for example, when a power outage causes a stationary storage battery to discharge and its remaining capacity reaches a predetermined value, a discharge command is sent from the management device to a mobile object that meets certain requirements. The mobile object that receives this discharge command then moves to the facility and discharges the power from the running storage battery to the load, so that power supply to the load continues even if the stationary storage battery runs out of capacity.

The invention described in claim 2 is characterized in that in the power supply system described in claim 1, the management device sequentially transmits the discharge command to the mobile body that satisfies predetermined requirements so that the power supply to the load is continued without interruption by the stationary storage battery and the traveling storage battery.

The invention described in claim 3 is characterized in that in the power supply system described in claim 1 or 2, the management device stops discharging the storage battery for driving when the remaining capacity of the storage battery for driving during discharging reaches a capacity required for the mobile body to move to a second facility equipped with a charging power source capable of charging the storage battery for driving.

The invention described in claim 4 is characterized in that in the power supply system described in claim 3, the management device transmits a charging command to the mobile body of the traction storage battery that has stopped discharging, to move to the second facility and charge the traction storage battery with the charging power source.

The invention described in claim 5 is characterized in that in the power supply system described in claims 1 to 4, when the stationary storage battery is discharged, the management device distributes discharge cooperation information to the multiple mobile bodies, the discharge cooperation information including the location of the facility and a reward, inviting cooperation in discharging from the traveling storage battery to the load of the facility.

The invention described in claim 6 is characterized in that, in the power supply system described in claims 1 to 5, the management device distributes to the multiple mobile bodies, when the stationary storage battery is scheduled to be discharged, second discharge cooperation information that solicits cooperation in discharging from the traveling storage battery to the load of the facility, and includes the location of the facility, a reward, and a scheduled date and time of discharge.

The invention described in claim 7 is characterized in that, in the power supply system described in claims 1 to 6, when the stationary storage batteries of multiple facilities are discharged simultaneously, the management device transmits the discharge command to the mobile body that satisfies predetermined requirements so that power supply to the load of the facility with a high priority is continued without interruption.

According to the invention described in claim 1, when the stationary storage battery is discharged due to a power outage or the like and its remaining capacity reaches a predetermined value, a mobile body that meets the predetermined requirements moves to the facility and the running storage battery discharges to the load, so that even if the stationary storage battery is depleted (or there is a risk of it being depleted), it is possible to supply power continuously (for a long time). In this way, even if the mobile body is not parked or stationed at the facility, the mobile body moves to the facility when necessary and discharges power from the running storage battery, so that it is possible to effectively utilize the running storage batteries of the scattered mobile bodies and flexibly supply power to the necessary facility when and as much as is necessary. In addition, because the running storage battery can be used, it is possible to reduce the rated capacity of the stationary storage battery.

According to the invention described in claim 2, in order to ensure that the power supply to the load continues without interruption, mobile objects that satisfy predetermined requirements move to the facility in sequence and discharge power from the traveling storage battery to the load, thereby preventing the stoppage or interruption of important loads such as communication facilities and medical facilities.

According to the invention described in claim 3, when the remaining capacity of the driving storage battery during discharging reaches the capacity required to move to the second facility, the discharging of the driving storage battery is stopped, so that the mobile body can move to the second facility and charge the driving storage battery with the charging power source. Then, the mobile body moves to the facility again and discharges from the driving storage battery to the load, making it possible to supply power continuously.

According to the invention described in claim 4, a charging command is sent to a mobile object whose traction storage battery has stopped discharging, so that the mobile object can move to the second facility appropriately (even without knowing that charging is possible at the second facility) and charge the traction storage battery.

According to the invention described in claim 5, when the stationary storage battery discharges, discharge cooperation information is distributed to multiple mobile bodies, so that even if the stationary storage battery suddenly discharges without prediction, more mobile bodies are informed that discharge from the running storage battery is necessary. As a result, it becomes possible to receive discharge from more running storage batteries and supply power to the load more continuously.

According to the invention described in claim 6, when the stationary storage battery is scheduled to be discharged, second discharge cooperation information including the scheduled discharge date and time is distributed to multiple mobile bodies, so that the need for discharge from the running storage battery is made known to more mobile bodies in advance before the stationary storage battery is discharged. As a result, it is possible to receive discharge from an appropriate number of running storage batteries and to supply power to the load appropriately and smoothly and continuously.

In this way, it becomes possible to effectively utilize the running storage battery to supply power to the load, both at specified times such as during a power outage and at other times, making it possible to adjust and level out the supply and demand of electricity. In other words, because electricity can be supplied and replenished from the mobile vehicle at any time to facilities that require electricity, in the amount required, it becomes possible to reduce power facilities and provide appropriate power supply to areas with limited power facilities.

According to the invention described in claim 7, when stationary storage batteries in multiple facilities are discharged simultaneously, the mobile body moves and the running storage battery is discharged so that the power supply to the load of the facility with the highest priority can be continued without interruption. Therefore, even if power is required at multiple facilities at the same time, it is possible to prevent the stoppage or interruption of the load of important communication equipment, medical equipment, etc.

1 is a schematic configuration diagram showing a power supply system according to an embodiment of the present invention; FIG. 2 is a diagram showing the equipment configuration of a communication building in the power supply system of FIG. 1. FIG. 2 is a block diagram of a main part of an electric vehicle in the power supply system of FIG. 1 . FIG. 2 is a diagram showing an example of discharge cooperation information in the power supply system of FIG. 1 . FIG. 2 is a diagram showing an example of second discharge cooperation information in the power supply system of FIG. 1 . 2 is a timing chart showing a power supply method by the power supply system of FIG. 1 . 7 is a timing chart showing a continuation of FIG. 6; 2 is a diagram showing a state in which a commercial power supply power supply system of FIG. 1 experiences a power outage; FIG. 2 is a diagram showing a state in which a first company vehicle is discharging at a first communication building in the power supply system of FIG. 1 . FIG. 2 is a diagram showing a state in which a first company car is charging at a second communication building and a second company car is discharging at the first communication building in the power supply system of FIG. 1 . 1. FIG. 4 is a diagram showing a state in which second discharge cooperation information is being distributed in the power supply system of FIG. FIG. 11 is a diagram showing the equipment configuration of another communication building to which the present invention can be applied.

The present invention will be described below based on the illustrated embodiment.

1 is a schematic diagram showing a power supply system 1 according to an embodiment of the present invention. The power supply system 1 is a system for continuously supplying power to a facility equipped with a backup battery (stationary storage battery) 3. The facility may include a communication building or a hospital, but in this embodiment, the case of a communication building 2 will be mainly described. In addition, a plurality of communication buildings 2 are installed over a wide area, and small communication buildings (for example, a first communication building 2 ₁ ) and large communication buildings (in this embodiment, a second communication building 2 ₂ ) are mixed.

This power supply system 1 mainly comprises a backup battery 3 installed in a communication building 2, a number of electric vehicles (mobiles) 4 and 5, and a management computer (management device) 6 provided in a management center C that manages each communication building 2.

The backup battery 3 is a backup power source that discharges and supplies power to a load device (load) 21 such as a communication facility during a power outage (at a specified time), and is configured as a battery pack in which multiple cells (unit batteries/secondary batteries) 31 (e.g., 23 cells) are connected in series, as shown in FIG. 2. Each cell 31 may be any type of battery, including lithium ion secondary batteries and valve-regulated lead-acid batteries. In this embodiment, the rated capacity (kWh) of the backup battery 3 when fully charged is set so that it can supply power to the load device 21 for the specified discharge time.

This backup battery 3 is connected to a rectifier 23, and power from the commercial power source 100 is converted to direct current by the rectifier 23 and supplied to the backup battery 3, thereby charging the backup battery 3. Furthermore, a load device 21 is connected to the rectifier 23, and direct current power is similarly supplied to the load device 21, so that when the commercial power source 100 experiences a power outage, direct current power is supplied from the backup battery 3 to the load device 21.

The control device 22 is a device that controls the rectifier 23 and the driving batteries (driving storage batteries) 44, 54 described later, and is connected to the rectifier 23 and multiple chargers/dischargers 24 for charging and discharging the driving batteries 44, 54. Here, the chargers/dischargers 24 are installed in the parking lot where the electric vehicles 4, 5 are parked, and have the function of converting the voltage suitable for charging and discharging. When the commercial power source 100 is normal, power from the commercial power source 100 is supplied to the charger/discharger 24 via the rectifier 23, so that the driving batteries 44, 54 can be charged. When the commercial power source 100 experiences a power outage, the charger/discharger 24 discharges the driving batteries 44, 54 and supplies power to the load device 21.

This control device 22 has the function of detecting the charge/discharge state and remaining capacity of the backup battery 3, and the function of detecting the voltage and abnormalities (overcharging, undercharging, etc.) of each cell 31. It is also communicatively connected to the management computer 6 via the communication network NW, and is configured to transmit the detected remaining capacity and abnormalities, as well as the charging/discharging state of each charger/discharger 24, to the management computer 6 in real time. Furthermore, as described below, it controls each charger/discharger 24 and the backup battery 3 according to instructions from the management computer 6. Here, when communicating with the management computer 6, the control device 22 and management computer 6 add identification information of the control device 22, i.e., the communication building 2, and the target charger/discharger 24.

In addition to this configuration, the large-scale communications building, i.e., the second communications building ₂₂ , is provided with an engine generator 25 so that even if the remaining capacity of the backup battery 3 runs out, the engine generator 25 can supply power to the load device 21 and the charger/discharger 24. In other words, this engine generator 25 is a charging power source capable of charging the traveling batteries 44, 54, and the second communications building ₂₂ is a second facility equipped with this charging power source. Therefore, in this embodiment, even if the second communications building ₂₂ experiences a power outage, it is not a target facility for backup by the traveling batteries 44, 54 as described below, but a facility for charging the traveling batteries 44, 54.

Electric vehicles 4, 5 are equipped with running batteries 44, 54 for travel, and are capable of discharging electricity from the running batteries 44, 54 to a load device 21 in the communications building 2. Here, electric vehicle 4 is a company vehicle owned by the company in the communications building 2 and used by employees, and will be referred to as company vehicle 4 below as appropriate. Electric vehicle 5 is also a general vehicle not owned by the company in the communications building 2, and will be referred to as general vehicle 5 below as appropriate.

As shown in FIG. 3, the electric vehicles 4 and 5 mainly include a communication unit 41 and 51, a GPS unit 42 and 52, a battery controller 43 and 53, and a central control unit 40 and 50 that controls these.

The communication units 41 and 51 are interfaces for communicating with the management computer 6 and the like via the communication network NW. Here, in the case of a general vehicle 5, communication with the management computer 6 may be performed via an external server or computer. For example, if the general vehicle 5 is a vehicle of a taxi company, communication with the management computer 6 may be performed via a taxi company's computer. In addition, in this embodiment, the communication units 41 and 51 are configured as a car navigation system, and various commands and distributed information (such as discharge cooperation information described later) from the management computer 6 described later are displayed on the monitor of the car navigation system or output as voice. In contrast, for example, the communication units 41 and 51 may be configured as a smartphone (multifunctional mobile terminal) of the passenger of the electric vehicle 4 or 5, and the commands and distributed information from the management computer 6 may be displayed on the display of the smartphone. In other words, in this invention, commands to the electric vehicles 4 and 5 also include commands to the passenger.

The GPS units 42, 52 receive time signal radio waves from GPS satellites and calculate and detect the latitude and longitude of the current positions of the electric vehicles 4, 5. In addition, the current position of at least the company vehicle 4 as determined by the GPS unit 42 can be obtained at any time from the management computer 6 as described below.

The battery controllers 43, 53 are controllers that control the charging and discharging of the driving batteries 44, 54, and have a function to detect the remaining capacity of the driving batteries 44, 54. Any method may be used to detect the remaining capacity, and for example, the remaining capacity may be calculated by calculating the power consumption based on the travel distance, or the remaining capacity may be calculated based on a discharge curve. Furthermore, at least the remaining capacity of the driving battery 44 of the company car 4 can be obtained at any time from the management computer 6 as described below. Furthermore, charging and discharging ports 45, 55 are connected to the driving batteries 44, 54, and the driving batteries 44, 54 are charged and discharged by connecting the charging and discharging ports 45, 55 to the charger/discharger 24.

When such electric vehicles 4, 5 are parked in the communication building 2 and the charge/discharge ports 45, 55 are connected to the charger/discharger 24, the driving batteries 44, 54 become chargeable and the driving batteries 44, 54 become dischargeable to the load device 21. Furthermore, at least in the case of company cars 4, EV information including the current position (location information of the moving body) and current time detected by the GPS unit 42, the remaining capacity of the driving battery 44 detected by the battery controller 43, and the identification information of the company car 4 is transmitted to the management computer 6 periodically, when necessary, or whenever requested by the management computer 6. It is noted that such EV information may also be transmitted to the management computer 6 for general cars 5.

The management computer 6 can freely communicate with the control device 22 of each communication building 2 and each electric vehicle 4, 5, and, as described above, can obtain the remaining capacity of the backup battery 3 and the driving battery 44 and the current location of each company vehicle 4, etc. Then, by sending various commands to the control device 22 of each communication building 2 and each electric vehicle 4, 5, it controls the charging and discharging of the backup battery 3 and the driving batteries 44, 54. In other words, it transmits commands and performs controls such as the following:

First, when the remaining capacity of the backup battery 3 during discharging reaches a predetermined value, a mobile discharge command (discharge command) is sent to the company car 4 that meets the predetermined requirements based on the current location of each company car 4 and the remaining capacity of each driving battery 44 to move to the communication building 2 where the backup battery 3 is located and discharge from the driving battery 44 to the load device 21. Here, the mobile discharge command includes the location and identification information of the communication building 2 to which the vehicle should move. In addition, the predetermined value of the remaining capacity of the backup battery 3 is a sufficient capacity to supply power to the load device 21 until power is supplied from the driving battery 44 of the company car 4, and is set to a capacity that allows the backup battery 3 and the driving battery 44 to continue supplying power to the load device 21 without interruption, as described later. Therefore, when the specified discharge time of the backup battery 3 is short, it may be almost the same as the capacity when fully charged, in which case the mobile discharge command is sent immediately after the backup battery 3 is discharged.

The specified requirements are that the remaining capacity of the driving battery 44 of the company car 4 is sufficient to move from the current location to the communications building 2, and that after the move, the remaining capacity must be equal to or greater than a specified amount and capable of supplying power to the load device 21. The purpose of the trip, such as work or business, booked for the company car 4 must be stored in advance, and this purpose must be able to be canceled. Furthermore, the equipment of the company car 4 must be stored in advance, and it must not be equipped with equipment that can respond to a power outage. In other words, a company car 4 that is equipped with equipment that can respond to a power outage will prioritize responding to the power outage during a power outage.

In addition, if there are multiple company cars 4 that meet the specified requirements, the mobile discharge command may be sent to all company cars 4 at the same time, or may be sent sequentially at staggered times, depending on the number of company cars 4, the remaining capacity of each driving battery 44, the parking capacity of the communication building 2, etc.

Furthermore, a mobile discharge command is sent sequentially to the company cars 4 that meet the specified requirements so that the power supply to the load device 21 is continued without interruption by the backup battery 3 and the driving battery 44. That is, a mobile discharge command is sent sequentially to each company car 4 that meets the specified requirements so that the load device 21 is always powered by either the backup battery 3 or the driving battery 44. For example, when the remaining capacity of the backup battery 3 is low, a mobile discharge command is sent preferentially to a company car 4 that is close to the communication building 2 even if the remaining capacity of the driving battery 44 is low. Furthermore, when there are multiple company cars 4 that meet the specified requirements, a mobile discharge command is sent sequentially to each of the multiple company cars 4 so that a specified number of company cars 4 can always wait at the communication building 2. Furthermore, when there are few company cars 4 that meet the specified requirements, a mobile discharge command is sent cyclically (repeatedly) to the company cars 4 that have been discharged once so that they are charged as described below and then discharged again.

Secondly, when the remaining capacity of the driving battery 44 during discharging reaches the capacity (required capacity for travel) required for the company car 4 to travel to a second facility, i.e., a second communication building ₂₂ , which is equipped with an engine generator 25 capable of charging the driving battery 44, the discharging of the driving battery 44 is stopped. That is, the remaining capacity (discharged state) of the driving battery 44 while supplying power to the load device 21 is received from the control device 22, or the remaining capacity of the driving battery 44 is received from the company car 4, and when the remaining capacity reaches the required capacity for travel, a discharge stop command is sent to the control device 22. In response to this, the control device 22 stops discharging from the charger/discharger 24, i.e., the driving battery 44.

Furthermore, a mobile charging command (charging command) is sent to the company vehicle 4 with the driving battery 44 for which discharging has been stopped, to move to the second facility, i.e., the second communication building ₂₂ , and charge the driving battery 44 with the engine generator 25. That is, a mobile charging command is sent to the company vehicle 4 with the driving battery 44 whose remaining capacity has reached the required mobile capacity by supplying power to the load device 21, to charge the driving battery 44 at the second communication building _22. Here, the mobile charging command includes the position and identification information of the second communication building 22 to which the company vehicle ₄ should be moved.

Thirdly, when the backup batteries 3 of multiple communication buildings 2 are discharging simultaneously, a mobile discharge command is sent to company cars 4 that meet certain requirements so that the power supply to the load device 21 of the communication building 2 with the highest priority can be continued without interruption. That is, the importance and priority of each communication building 2 are set and stored in advance according to the communication equipment and communication lines equipped in each communication building 2. Then, when the backup battery 3 is discharging even in a communication building 2 with a high priority, mobile discharge commands are sent sequentially to the company cars 4 so that the power supply to the load device 21 of this communication building 2 can be continued without interruption, as described above. In addition, a mobile discharge command is sent to the remaining company cars 4 to move to another communication building 2.

Fourth, when the backup battery 3 is discharged, discharge cooperation information is distributed to multiple general vehicles 5, which is information requesting cooperation in discharging from the driving battery 54 to the load device 21 of that communication building 2. Here, the discharge cooperation information includes the location of the communication building 2 requiring cooperation in discharging, the amount of discharged power, and a reward. For example, as shown in FIG. 4, each communication building 2 is clearly indicated on a map, and the necessity of power supply/discharge at each communication building 2, the amount of discharged power per vehicle when discharge is required, and the compensation/cooperation fee are displayed on the map. The compensation is set according to the importance and urgency of the second communication building 2 requiring power supply. The same applies to the second discharge cooperation information described below.

In addition, when the backup battery 3 is discharged, the delivery of the discharge cooperation information may always be performed immediately after discharging, but may also be performed depending on the situation. For example, when many company cars 4 are located far away from the communication building 2 that requires power supply, the delivery of the discharge cooperation information may be performed immediately after discharging, or it may not be performed at the beginning of the power outage but may be performed when the power outage lasts for a specified period of time, or it may be performed when there is a risk that the company cars 4 alone will not be able to continue to supply power smoothly without interruption.

Fifth, when the backup battery 3 is scheduled to be discharged, second discharge cooperation information is distributed to the general vehicle 5, which is information soliciting cooperation in discharging from the driving battery 54 to the load device 21 of the communication building 2. Here, the second discharge cooperation information includes the location of the communication building 2 requiring discharge cooperation, the amount of discharged power, the remuneration, and the scheduled discharge date and time. For example, as shown in FIG. 5, the communication building 2 requiring discharge cooperation is specified on a map, and the scheduled discharge date and time (time zone), the amount of discharged power per vehicle, and the remuneration/cooperation fee are displayed on the map. The second discharge cooperation information is distributed, for example, when the scheduled discharge date and time of the backup battery 3 is decided, and the distribution ends when the required amount of discharge is secured by the application for cooperation from the general vehicle 5. Incidentally, examples of cases in which the backup battery 3 is discharged in a planned manner include planned work and event holding.

Such discharge cooperation information and second discharge cooperation information may be distributed only to specific general vehicles 5, or to all general vehicles 5 to which distribution is possible. For example, if a discharge cooperation contract has been concluded with a taxi company or rental car company, the information may be distributed only to that company's general vehicles 5, or may be distributed widely over the Internet. Note that in this embodiment, the discharge cooperation information and second discharge cooperation information are not distributed to company cars 4, but they may be distributed.

Next, the operation and function of the power supply system 1 configured as above and the method of power supply by the power supply system 1 will be described with reference to the timing charts in Figures 6 and 7.

First, under normal circumstances, as shown in Fig. 1, the load device 21, the backup battery 3, and the charger/discharger 24 are connected to the rectifier 23, and power from the commercial power source 100 is supplied to the load device 21 and the backup battery 3 via the rectifier 23, and can be supplied to the charger/discharger 24. In this state, for example, as shown in Fig. 8, when the commercial power source 100 fails in the first communication building _2-1 and the second communication building _2-2 (step S1), the respective backup batteries 3 are discharged, and the control device 22 transmits a notice to the management computer 6 that the backup batteries 3 have started discharging (step S2).

Next, the remaining capacity of the backup battery 3 is successively transmitted from the control device 22 of the first communication building ₂₁ etc. to the management computer 6 (step S3), and an EV information request is transmitted from the management computer 6 to each company car 4 (step S4). In response to this, EV information including the current time, the identification information of the company car 4, the current position, and the remaining capacity of the driving battery 44 is transmitted from each company car 4 to the management computer 6 (step S5).

Next, when the remaining capacity of the backup battery 3 in the first communication building _2.1 reaches a predetermined value, a move discharge command to the first communication building _2.1 is sent to the company cars 4 that satisfy the predetermined requirements in order to continue the power supply to the load device 21 without interruption as described above (step S6). In response to this, for example, as shown in Fig. 9, the first company car _4.1 moves to the first communication building _2.1 (step S7), and the charge/discharge port 45 is connected to the charger/discharger 24, thereby starting the discharge of the driving battery 44 (step S8). At this time, the discharge is selected in the charger/discharger 24, and the identification information of the first company car _4.1 and the passenger is input, whereby the discharge history is stored.

In this embodiment, when discharging from the driving battery 44 is possible, discharging from the backup battery 3 is suppressed or stopped, and discharging from the driving battery 44 is prioritized. In other words, the discharge current (power) from the charger/discharger 24 is adjusted according to the voltage and capacity of the backup battery 3, discharging from the backup battery 3 is suppressed, and discharging from the driving battery 44 is performed.

Next, the remaining capacity of the driving battery 44 of the first company car ₄₁ is successively transmitted from the control device 22 to the management computer 6 (step S9). Then, based on the remaining capacity and the status of the other company cars ₄ , for example, a move discharge command to the first communication building 21 is transmitted from the management computer 6 to the second company car ₄₂ so that power supply to the load device 21 can be continued (step S10), and the second company car ₄₂ moves to the first communication building ₂₁ (step S11).

Next, when the remaining capacity of the driving battery 44 of the first company vehicle ₄₁ reaches the capacity required for travel, a discharge stop command is sent from the management computer 6 to the control device 22 (step S12), and in response to this, the discharging of the driving battery 44 is stopped (step S13). At the same time, a travel charge command to the second communication building ₂₂ is sent to the first company vehicle ₄₁ (step S14).

Next, the second company car ₄₂ that has arrived at the first communication building ₂₁ connects the charge/discharge port 45 to the charger/discharger 24, and the discharging of the driving battery 44 begins (step S15). Meanwhile, as shown in Fig. 10, the first company car ₄₁ moves to the second communication building ₂₂ (step S16), and connects the charge/discharge port 45 to the charger/discharger 24, and the charging of the driving battery 44 begins (step S17). At this time, charging is selected on the charger/discharger 24, and the identification information of the first company car ₄₁ and the passenger is input, and the charging history is stored. Also, the remaining capacity of the driving battery 44 of the second company car ₄₂ is successively transmitted from the control device 22 of the first communication building ₂₁ to the management computer 6 (step S18).

In this way, a plurality of company cars 4 are moved in sequence to the first communication building ₂₁ to discharge and supply power, and when the remaining capacity of the driving battery 44 becomes low, the company cars 4 are moved to the second communication building ₂₂ to charge. By repeating this charging and discharging process, power supply to the load device 21 in the first communication building ₂₁ is continued.

Meanwhile, at the above-mentioned predetermined timing, discharge cooperation information to the first communication building ₂₁ is distributed to the plurality of general vehicles 5 (step S19). Then, for example, when the first general vehicle ₅₁ transmits a discharge consent to cooperate in discharging to the management computer 6 (step S20), and it is determined that the first general vehicle ₅₁ needs to cooperate in discharging based on the charging and discharging status of the company vehicle 4, a discharge request is transmitted from the management computer 6 to the first general vehicle ₅₁ (step S21). In response to this, the first general vehicle ₅₁ moves to the first communication building ₂₁ (step S22). Here, the discharge consent includes identification information of the first general vehicle ₅₁ and the passengers, and cooperation history is stored based on this.

Next, for example, when the remaining capacity of the driving battery 44 of the second company car ₄₂ reaches the required capacity for travel, a discharge stop command is sent from the management computer 6 to the control device 22 (step S23), and discharging of the driving battery 44 is stopped (step S24). Then, the first general vehicle ₅₁ that has arrived at the first communication building ₂₁ connects the charge/discharge port 45 to the charger/discharger 24, and discharging of the driving battery 44 is started (step S25). Here, by inputting identification information of the first general vehicle ₅₁ and the passengers into the charger/discharger 24 prior to discharging, a cooperation history of which general vehicle 5, when, where, and how much was discharged is stored.

In this way, the company car 4 and the general vehicle 5 continue to supply power to the load device 21 in the first communication building _21. Then, when the power outage in the first communication building ₂₁ ends and the commercial power source 100 is restored, power is supplied from the commercial power source 100 to the load device 21 and the backup battery 3, and the driving batteries 44, 54 connected to the charger/discharger 24 are charged. Also, based on the cooperation history, a payment process is performed to the passenger/owner of the general vehicle 5 that cooperated in discharging.

On the other hand, during normal times when the commercial power source 100 is not experiencing a power outage, when the scheduled date and time for discharging the backup battery 3 of a specific communication building 2 is determined, second discharge cooperation information is distributed from the management computer 6 to the general vehicle 5 as shown in FIG. 11. Then, a cooperation application for discharging cooperation is sent from the general vehicle 5 to the management computer 6, and if it is determined that the cooperation for discharging is necessary based on the status of the cooperation application, etc., a discharge request is sent from the management computer 6 to the general vehicle 5. In response to this, the general vehicle 5 moves to the communication building 2 on the scheduled date and time for discharging to discharge. Here, the cooperation application includes identification information of the general vehicle 5 and the passengers, so that the cooperation history is stored and the payment of the consideration is processed.

As described above, according to the power supply system 1 and the power supply method, when the backup battery 3 is discharged due to a power outage or the like and its remaining capacity reaches a predetermined value, the electric vehicles 4, 5 that meet the predetermined requirements move to the communication building 2 and discharge from the driving batteries 44, 54 to the load device 21. Therefore, even if the backup battery 3 is depleted (or there is a possibility of it being depleted), it is possible to supply power continuously (for a long time). In this way, even if the electric vehicles 4, 5 are not parked or stationed at the communication building 2, the electric vehicles 4, 5 move to the communication building 2 when needed and discharge from the driving batteries 44, 54, so that it is possible to effectively utilize the driving batteries 44, 54 of the scattered electric vehicles 4, 5 and flexibly supply power to the necessary communication building 2 when needed, in the amount required. In addition, since the driving batteries 44, 54 can be used, it is possible to reduce the rated capacity of the backup battery 3.

Furthermore, to ensure that the power supply to the load device 21 continues without interruption, electric vehicles 4, 5 that meet certain requirements move in sequence to the communication building 2 and discharge their running batteries 44, 54 to the load device 21. This makes it possible to prevent important load devices 21, such as communication equipment and medical equipment, from being stopped or interrupted.

Furthermore, when the remaining capacity of the discharging driving batteries 44, 54 reaches the capacity required to move to the second communication building ₂₂ equipped with the engine generator 25, the discharging of the driving batteries 44, 54 is stopped. This allows the electric vehicles 4, 5 to move to the second communication building 22 and charge the driving batteries 44, 54 with the engine generator 25. Then, the electric vehicles 4, 5 move again to the communication building ₂ that requires discharging and discharge the driving batteries 44, 54 to the load device 21, thereby enabling a continuous supply of power.

Furthermore, since a mobile charging command is sent to the electric vehicles 4, 5 whose driving batteries 44, 54 have stopped discharging, the electric vehicles 4, 5 can properly move to the second communication building ₂₂ (even without knowing that charging is possible at the second communication building ₂₂ ) and charge the driving batteries 44, 54.

In addition, when the backup battery 3 discharges, discharge cooperation information is distributed to multiple general vehicles 5, so that even if the backup battery 3 suddenly discharges without prediction, more general vehicles 5 are informed that discharge from the driving battery 54 is necessary. As a result, it becomes possible to receive discharge from more driving batteries 54 and supply power to the load device 21 more continuously.

Furthermore, when the backup battery 3 is scheduled to be discharged, second discharge cooperation information including the scheduled discharge date and time is distributed to multiple general vehicles 5, so that more general vehicles 5 are informed in advance that discharge from the driving batteries 54 is required before the backup battery 3 is discharged. As a result, it becomes possible to receive discharge from an appropriate number of driving batteries 54 and to supply power to the load device 21 appropriately and smoothly and continuously.

In this way, it is possible to effectively use the driving batteries 44, 54 to supply power to the load device 21 during and after a power outage, making it possible to adjust and level out the power supply and demand. In other words, because the electric vehicles 4, 5 can supply and replenish the necessary amount of power to facilities that require it at any time, it is possible to reduce power facilities and provide appropriate power supply to areas with limited power facilities.

On the other hand, when the backup batteries 3 of multiple communication buildings 2 are discharged simultaneously, the electric vehicles 4, 5 move and the driving batteries 44, 54 are discharged so that the power supply to the load devices 21 of the communication buildings 2 with higher priority can be continued without interruption. Therefore, even if power is required at multiple communication buildings 2 at the same time, it is possible to prevent the load devices 21, such as communication equipment and medical equipment, which are of high importance, from being stopped or interrupted.

Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, and even if there are design changes within the scope of the present invention, they are included in the present invention. For example, in the above embodiment, the mobile objects are electric vehicles 4 and 5, but they may be ships or self-propelled robots if they are equipped with a storage battery for running. Also, the facility is mainly a communication building 2, but the facility may be a hospital, public facility, evacuation shelter, etc.

In the above embodiment, the charger/discharger 24 is connected to a DC grid, but as shown in FIG. 12, the present invention can also be applied to an AC grid. That is, the charger/discharger 24 may be connected to a commercial power source 100 in parallel with the rectifier 23, and the AC power from the commercial power source 100 may be converted to DC by the charger/discharger 24 and supplied to the driving batteries 44, 54. In this case, a UPS 8 having a larger capacity than the load device 21 and including an AC/DC converter 81 and a large-capacity storage battery 82 is provided in parallel with the charger/discharger 24.

In addition, when distributing the discharge cooperation information and the second discharge cooperation information, cooperation targets may be limited to only the driving batteries 44, 54 charged with clean energy such as solar power generation or wind power generation. In this case, for example, when charging the driving batteries 44, 54, the fact that the energy is clean is stored in the electric vehicles 4, 5, and when discharging at the communication building 2, the electric vehicles 4, 5 output that the batteries were charged with clean energy, thereby ensuring that the energy is clean.

1. Power supply system 2. Telecommunications building (facility)
2 ₂ Second Communication Building (Second Facility)
21 Load device (load)
22 Control device 23 Rectifier 24 Charger/discharger 25 Engine generator (charging power source)
3. Backup battery (stationary storage battery)
4. Company cars, electric vehicles (mobile vehicles)
44 Running battery (running storage battery)
5. Regular cars, electric cars (mobile vehicles)
54 Running battery (running storage battery)
6 Management computer (management device)
100 Commercial power source (system power, external)
C Management Center NW Communication Network

Claims (7)

A stationary storage battery that is installed in the facility and discharges to a load when a commercial power supply is interrupted ;
a plurality of moving bodies each including a storage battery for traveling for moving, the storage battery for traveling being capable of discharging electricity from the storage battery for traveling to the load in the facility;
a management device that can communicate with the plurality of moving bodies and acquire the remaining capacity of the stationary storage battery and the traveling storage battery and the position of the moving body;
when the remaining capacity of the stationary storage battery during discharging reaches a predetermined value, the management device transmits a discharge command to the mobile bodies that satisfy a predetermined requirement based on the positions of the multiple mobile bodies and the remaining capacities of the respective traction storage batteries, to cause the mobile bodies to move to the facility and discharge from the traction storage batteries to the load;
The predetermined value of the remaining capacity of the stationary storage battery is set to a capacity that allows power to be supplied to the load until power is supplied from the traveling storage battery to the load.
A power supply system comprising: the management device sequentially transmits the discharge command to the mobile body that satisfies a predetermined requirement so that power supply to the load is continued without interruption by the stationary storage battery and the traveling storage battery.
2. The power supply system according to claim 1 . the management device stops discharging the storage battery for travel when a remaining capacity of the storage battery for travel during discharging reaches a capacity required for the moving body to move to a second facility equipped with a charging power source capable of charging the storage battery for travel.
3. The power supply system according to claim 1, wherein the power supply system is a power supply system for supplying electric power to a vehicle. the management device transmits a charging command to the mobile body of the storage battery for traveling that has stopped discharging, to move to the second facility and charge the storage battery for traveling with the charging power source.
4. The power supply system according to claim 3. the management device distributes, to the plurality of mobile bodies, discharge cooperation information, which is information requesting cooperation in discharging from the traveling storage battery to a load of the facility when the stationary storage battery is discharged, and includes a location of the facility and a reward.
5. The power supply system according to claim 1, wherein the power supply system is a power supply system for supplying electric power to a vehicle. When the stationary storage battery is scheduled to be discharged, the management device distributes to the plurality of mobile bodies second discharge cooperation information, which is information soliciting cooperation in discharging from the traveling storage battery to a load of the facility, and includes a location of the facility, a reward, and a scheduled date and time of discharge.
6. The power supply system according to claim 1, wherein the power supply system is a power supply system for supplying electric power to a vehicle. when the stationary storage batteries of a plurality of the facilities are simultaneously discharged, the management device transmits the discharge command to the mobile object that satisfies a predetermined requirement so that power supply to the load of the facility having a high priority can be continued without interruption.
7. The power supply system according to claim 1, wherein the power supply system is a power supply unit.

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