JP6437121B2 - Storage battery control device, power storage system, and solar power generation system - Google Patents

Description

  The present invention relates to a storage battery control device, a power storage system, and a solar power generation system that control charging and discharging of a storage battery.

  A conventional power storage system includes, for example, a secondary battery such as a lithium ion battery, and a non-return switch that is interposed in series with a charge / discharge path of the secondary battery and shuts off the charge / discharge path by its operation. In particular, a battery having a discharge resistor that is connected in parallel to the secondary battery to form a discharge path of the secondary battery when the charge / discharge path of the secondary battery is interrupted by the operation of the non-return switch is disclosed. (For example, refer to Patent Document 1).

JP 2001-126792 A

  In such a power storage system, when the storage battery is overcharged and discarded, the power stored in the storage battery is discharged in order to increase safety at the time of disposal. However, in the event of an abnormality due to a disaster such as an earthquake, tsunami, storm, flood, or fire, the storage battery is in a normal state rather than an overcharged state, so the power stored in the storage battery is not discharged and remains as it is. Was retained. Therefore, depending on the extent of the disaster, there is a risk that the house collapses and damages the power storage system, which may result in a secondary disaster if the power stored in the storage battery is held without being discharged. There was a possibility.

  The present invention has been made to solve the above-described problems. For example, when an abnormality has occurred due to a disaster such as an earthquake, a tsunami, storms and floods, or a fire, the power stored in the storage battery is discharged and the secondary battery is discharged. An object of the present invention is to provide a storage battery control device, a power storage system, and a solar power generation system that can reduce the possibility of occurrence of a disaster as compared with the conventional case.

A storage battery control device according to the present invention is a storage battery control device that controls charge / discharge of a storage battery, and is stored in the storage battery control device or an abnormality detection unit that detects an abnormality caused by a disaster around the storage battery control device, and the storage battery. Power consumption unit that consumes the power, and when it is determined that an abnormality has occurred based on the signal received from the abnormality detection unit, the power consumption unit consumes the power stored in the storage battery and falls below the set charge amount A power control unit that reduces the amount of power of the storage battery , the power control unit determines the degree of abnormality, and consumes the power of the storage battery when the degree of abnormality is greater than or equal to the first set value and less than the second set value. , and the electric energy storage battery set charge amount or less and the lower limit charge amount or more, to consume the electric power of the battery when the degree of abnormality is greater than the second set value, is obtained by less than the lower charge amount of power quantity of the battery .

The power storage system according to the present invention is a storage battery control device that controls charging / discharging of a storage battery, and is stored in the storage battery control device or an abnormality detection unit that detects an abnormality caused by a disaster around the storage battery control device. When it is determined that an abnormality has occurred based on the power consumption unit that consumes power and the signal received from the abnormality detection unit, the power consumption unit consumes the power stored in the storage battery, and the storage battery falls below the set charge amount. A storage battery control device having a power control unit that reduces the amount of power of the battery, and a power storage device having a storage battery whose charge / discharge is controlled by the storage battery control device , the power control unit determines the degree of abnormality, When the degree is greater than or equal to the first set value and less than the second set value, the power of the storage battery is consumed, the energy amount of the storage battery is set to the set charge amount or less and the lower limit charge amount or more, and the degree of abnormality is the second set value or more It is consuming power of the battery if, in which is less than the lower limit charge amount of power quantity of the battery.

A photovoltaic power generation system according to the present invention is a storage battery control device that controls charging / discharging of a storage battery, the storage battery control device or an abnormality detection unit that detects an abnormality caused by a disaster around the storage battery control device, and a storage battery When it is determined that an abnormality has occurred based on the signal received from the abnormality detection unit and the power consumption unit that consumes the generated power, the power consumption unit consumes the electric power stored in the storage battery, and is less than the set charge amount A storage battery control device having a power control unit for reducing the amount of power of the storage battery, a power storage system having a power storage device having a storage battery whose charge / discharge is controlled by the storage battery control device, and power generated by solar power generation There is charged into the storage battery of the power storage system, and a solar panel that generates electricity by photovoltaic power control unit determines the degree of the abnormality, the degree of abnormality is first The battery power is consumed when the value is greater than or equal to the specified value and less than the second set value, and the power amount of the storage battery is set to the set charge amount or less and the lower limit charge amount or more. It is made to consume and the electric energy of a storage battery is made less than a minimum charge amount .

  According to the storage battery control device, the power storage system, and the solar power generation system according to the present invention, in the event of an abnormality due to a disaster such as an earthquake, tsunami, storm and flood damage, or fire, the power stored in the storage battery is discharged and the secondary The possibility that a disaster will occur can be reduced as compared with the prior art.

1 is a block diagram of a photovoltaic power generation system according to Embodiment 1 of the present invention. It is an image figure which shows the relationship between the charge amount of the storage battery which concerns on Embodiment 1 of this invention, and the possibility of a secondary disaster. It is an image figure showing the relationship between the seismic intensity at the time of illustrating an earthquake as an example of the disaster in Embodiment 1 of this invention, and the grade of abnormality. It is a flowchart explaining the abnormality confirmation process of the electric power control part of the storage battery control apparatus which concerns on Embodiment 1 of this invention. It is an image figure showing the relationship between the seismic intensity at the time of illustrating an earthquake as an example of the disaster in Embodiment 2 of this invention, and the grade of abnormality. It is a flowchart explaining the abnormality confirmation process of the electric power control part of the storage battery control apparatus which concerns on Embodiment 2 of this invention.

Embodiment 1 FIG.
A photovoltaic power generation system 1 according to Embodiment 1 of the present invention will be described with reference to FIGS. In the drawings, the same reference numerals are the same or equivalent, and this is common throughout the entire specification.

  FIG. 1 is a block diagram of a photovoltaic power generation system 1 according to Embodiment 1 of the present invention. As shown in FIG. 1, the photovoltaic power generation system 1 according to Embodiment 1 of the present invention includes a solar panel 2 and a power storage system 3. In FIG. 1, a solid line arrow illustrates the direction in which current flows, and a dotted line arrow illustrates the direction in which a signal flows.

  The solar panel 2 is a solar cell module that generates power by receiving solar radiation from the sun and outputs the generated power to the power storage system 3. The power storage system 3 includes a power storage device 4 and a storage battery control device 6. The electric power generated and output by the solar panel 2 is charged to the storage battery 5 of the power storage device 4 via the storage battery control device 6. Details of the power storage device 4 and the storage battery control device 6 will be described later.

  The connection load 21 is, for example, a home appliance, lighting, an elevator such as an elevator, a business device, or a ventilator, and operates with power generated by the solar panel 2 or power from the system power supply 20. Here, the home appliance is, for example, an air conditioner, a refrigerator, a television, a radio, a fan, or a mobile phone.

  The system power supply 20 is an AC power supply that supplies power to the photovoltaic power generation system 1, and charges the power storage device 4 or supplies power to the connection load 21 via the storage battery control device 6. In addition, when the power generated by the solar panel 2 is larger than the power required by the connection load 21 and the storage battery 5 cannot be fully charged, the surplus power generated by the solar panel 2 is used as the system power supply. 20 can be sold.

  Next, details of the power storage device 4 and the storage battery control device 6 will be described. The power storage device 4 includes a storage battery 5, and charging / discharging is controlled by the storage battery control device 6. The storage battery 5 is composed of, for example, a lithium ion secondary battery, a nickel metal hydride battery, a lead storage battery, a NAS battery, or a redox flow battery. In addition, the power storage device 4 is configured to use not only a stationary stationary power storage device but also an in-vehicle power storage device applied to an electric vehicle that can be easily removed and moved instead of or in addition to the stationary power storage device. But you can.

  Here, the relationship between the charged amount of the storage battery 5 and the possibility of a secondary disaster will be described with reference to FIG. The secondary disaster refers to a disaster that secondarily occurs from the power storage system 3 due to the influence of the disaster when a disaster such as an earthquake, tsunami, storm and flood damage, or fire occurs. FIG. 2 is an image diagram showing a relationship between the charged amount of storage battery 5 and the possibility of a secondary disaster according to Embodiment 1 of the present invention.

  The vertical axis in FIG. 2 represents the magnitude of the possibility of a secondary disaster, and the horizontal axis represents the charge amount of the storage battery 5. From the line 50 representing the correspondence between the possibility of a secondary disaster and the charge amount of the storage battery 5 in FIG. 2, the greater the charge amount of the storage battery 5, the higher the possibility of a secondary disaster. It can be seen that the lower the probability of a secondary disaster, the lower. In addition, the higher the possibility of a secondary disaster, the higher the amount of charge of the storage battery, so the scale at the time of the secondary disaster will also increase, and the lower the possibility of a secondary disaster, the more charged the storage battery. Therefore, the scale when a secondary disaster occurs is also small. For example, even if an earthquake occurs in a house, the house collapses, and the power storage system 3 is damaged, the possibility of a secondary disaster occurring from the power storage system 3 can be reduced as the charge amount of the storage battery 5 is lower.

  Moreover, the charge range of the storage battery 5 is demonstrated using FIG. The amount of charge of the storage battery 5 of the power storage device 4 has an appropriate range. If overdischarge or overcharge is performed outside the appropriate range, battery characteristics may be significantly deteriorated and the secondary battery may not function properly. Therefore, the storage battery control device 6 normally controls the charge / discharge amount so that the charge amount of the storage battery 5 of the power storage device 4 falls within an appropriate range in which the deterioration of the battery characteristics is small. If the charge amount of the storage battery 5 is within an appropriate range, deterioration of battery characteristics is suppressed, and the battery 5 can be appropriately used as a secondary battery.

  From FIG. 2, the charge amount of the storage battery 5 is divided into a first setting range 30, a second setting range 31, an appropriate range 32, and an overcharge range 33.

  The first setting range 30 is a range in which the charge amount of the storage battery 5 is in an overdischarged state, the charge amount of the storage battery 5 indicates a range from X1 to X2, and a range lower than the appropriate range 32 of the charge amount of the storage battery 5 It is. When the charge amount of the storage battery 5 is in the first setting range 30, the battery is overdischarged. That is, the lower limit charge amount X2 is generally called the minimum allowable voltage, and is the lower limit value of the charge amount of the storage battery 5 for the storage battery 5 to function properly as a secondary battery, so the charge amount of the storage battery 5 is the lower limit charge amount. If it becomes less than X2, the storage battery 5 may not function properly as a secondary battery even after recharging.

  The second setting range 31 has a larger amount of charge of the storage battery 5 than the first setting range 30, is within the appropriate range 32 including the lower limit value (lower limit charge amount X2) of the appropriate range 32, and the charge amount of the storage battery 5 is the lower limit charge. The amount is in the range of X2 or more and the set charge amount X3 or less. The second setting range 31 is a state in which the electric power stored in the storage battery 5 is discharged as much as possible within an appropriate range, and the range from the lower limit charge amount X2 to the set charge amount X3 is preferably narrow.

  The appropriate range 32 is an appropriate range of the charge amount of the storage battery 5, and is a range in which the charge amount of the storage battery 5 is not less than the lower limit charge amount X2 and not more than the upper limit charge amount X4.

  The overcharge range 33 is a range where the charge amount of the storage battery 5 is in an overcharge state, and the charge amount of the storage battery 5 exceeds the upper limit charge amount X4. Here, X4 is generally called the maximum allowable voltage. When the charge amount of the storage battery 5 is in the overcharge range 33, the battery is overcharged. Similarly, even if recharge is performed thereafter, the storage battery 5 may not function properly as a secondary battery. Therefore, the storage battery control device 6 described later controls charging / discharging of the storage battery 5 so that the amount of power of the storage battery 5 falls within the appropriate range 32.

  The second setting range 31 is within the appropriate range 32 and partially overlaps with the appropriate range 32. Regarding the appropriate range 32, the charge amount of the storage battery 5 may be in a range that exceeds the set charge amount X3 and not more than the upper limit charge amount X4 so as not to overlap the second set range 31. However, also in this case, the second setting range 31 is a range in which the storage battery 5 appropriately functions as a secondary battery even if recharging is performed. X1, X2, X3, and X4 are predetermined charge amounts of the storage battery 5, and are design values.

  The storage battery control device 6 performs control so that the power generated by the solar panel 2 or the power charged in the storage battery 5 can be used efficiently. For example, the solar panel 2 charges the storage battery 5 with surplus power generated during the daytime in fine weather, but cannot generate power during rainy days or at night. Therefore, the storage battery control device 6 can use the power generated by the photovoltaic power generation by using the power stored in the storage battery 5 even at night or in the rain. Further, even if a power failure due to lightning strikes occurs and the power supply from the system power supply 20 is interrupted, the storage battery control device 6 supplies the power stored in the storage battery 5 to the connection load 21 and continues to operate the necessary equipment. It can also be made.

  In addition, the storage battery control device 6 uses the fact that the power of the grid power supply 20 is cheaper at night than in the daytime, and charges the storage battery 5 by receiving power from the grid power supply 20 at night. Keep it. And the electricity bill can be saved by using the electric power stored in the storage battery 5 during the day when an electricity bill becomes high. Moreover, since the storage battery control apparatus 6 uses the electric power stored in the storage battery 5 during the day, the effect of reducing the peak demand of the supply power during the day required for the system power supply 20 can also be expected.

  Here, the configuration of the storage battery control device 6 will be described. The storage battery control device 6 includes a DC / AC conversion device 7 having a power control unit 8, an interconnection independent control unit 11, an abnormality detection unit 9, a power consumption unit 13, a cooling device 14, a forced discharge switch 12, and an operation unit 10. Prepare.

  The DC / AC conversion device 7 is a power conditioner, performs mutual conversion between direct current and alternating current, and converts the electric power generated by the solar panel 2 into an appropriate voltage. For example, the power supplied from the system power supply 20 is converted from alternating current to direct current so that the storage battery 5 can be charged. Further, for example, when the power generated by the solar panel 2 is larger than the power required by the connection load 21 and the storage battery 5 cannot be charged, the power output from the solar panel 2 is converted from direct current to alternating current, Power can be sold to the system power supply 20. Note that the DC / AC conversion device 7 may be provided for the solar panel 2 and the power storage device 4, respectively.

  In addition, the DC / AC conversion device 7 includes a power control unit 8. The power control unit 8 is a control circuit, and controls the power storage device 4, the solar panel 2, the system power supply 20, and the connection load 21 including the transmission and reception of each power. For example, the power control unit 8 performs control to supply the power generated by the solar panel 2 or the power stored in the storage battery 5 to the connection load 21. Further, the power control unit 8 performs control to receive power supplied from the system power supply 20 and charge the storage battery 5. Further, the power control unit 8 performs control for charging the storage battery 5 with the power output from the solar panel 2.

  The storage battery control device 6 includes a processor such as a CPU (Control Processing Unit) and a memory, and the power control unit 8 operates when the processor executes a program stored in the memory.

  The power control unit 8 may be provided independently of the DC / AC converter 7 as well as the DC / AC converter 7. The power control unit 8 can also check whether the solar power generation system 1 including the power storage system 3 operates normally. Thereby, even after an abnormality has occurred due to a disaster, it is possible to confirm at least whether or not the power storage system 3 operates normally, and when it is normal, the storage battery 5 can be appropriately discharged. .

  The interconnection independent control unit 11 is a switch that switches circuits. When the power supply by the system power supply 20 is stopped (power failure), the system power supply unit 8 receives a control signal to disconnect the system power supply 20 from the power control unit 8. Disconnect the 20 side connection. Then, the power control unit 8 performs self-sustained operation control for supplying the power of the solar panel 2 or the power storage device 4 to the connection load 21. In addition, when the system power supply 20 is normal, the system power supply 20 can supply power to the connection load 21 or charge the storage battery 5 via the interconnection independent control unit 11.

  The abnormality detection unit 9 is a variety of sensors, and detects abnormality due to a disaster that has occurred around the storage battery control device 6 or the storage battery control device 6. As an apparatus for detecting an abnormality, for example, a vibration sensor, a water immersion sensor, a temperature sensor, a gas sensor, or the like can be used as the abnormality detection unit 9. Note that the abnormality detection unit 9 does not have to be a single various sensor, and a plurality of sensors may be provided, or may be configured by combining various sensors.

  The abnormality detection unit 9 normally transmits a detection signal to the power control unit 8 at all times. However, the abnormality detection unit 9 may transmit the detection signal to the power control unit 8 every predetermined time or when the detection value exceeds a predetermined threshold value, but is not limited thereto. In addition, the abnormality detection unit 9 may be provided in the storage battery control device 6, may be provided around the storage battery control device 6 (such as around the power storage device 4 or the power storage system 3), or provided in both. It may be done.

  Here, the effect when a disaster occurs will be described. For example, when a large-scale earthquake occurs, even if the power storage system 3 itself is safe, for example, the building in which the power storage system 3 is housed collapses after several hours or tens of hours, and the power storage system 3 is placed under the building. It may be damaged. Then, the storage battery 5 is deformed or collapsed due to the fall of rubble, etc., the components of the power storage system 3 are destroyed, the liquid inside the capacitor or the storage battery 5 leaks out, and the flammable gas may leak out. Furthermore, when a spark is generated due to switching of the switch or the like, the leaked combustible gas may be ignited to cause a secondary disaster.

  Moreover, when the example of a secondary disaster is shown, when the inundation by a tsunami or a storm and flood damage arises, the short circuit of the storage battery 5 may occur because the terminal part of the storage battery 5 is submerged. In addition, when a fire occurs, the temperature of the power storage system 3 rises, and there is a possibility that combustible gas may leak due to rupture of parts or an increase in internal pressure of the storage battery 5. In addition, the flame-retardant plastic used in the power storage system 3 may be incompletely burned in a fire, and a combustible gas such as carbon monoxide may be generated.

  Here, FIG. 3 is an image diagram showing the relationship between the seismic intensity and the degree of abnormality when an earthquake is illustrated as an example of the disaster in the first embodiment of the present invention. When a vibration sensor is used as the abnormality detection unit 9, the vibration sensor can detect acceleration due to shaking around the storage battery control device 6 or the storage battery control device 6, and can detect vibration due to an earthquake. The vibration sensor transmits the detected acceleration to the power control unit 8, and the power control unit 8 determines the seismic intensity based on the signal received from the vibration sensor. The vibration sensor may be configured not only to detect acceleration due to shaking but also to determine the seismic intensity and to transmit the seismic intensity to the power control unit 8. From FIG. 3, a straight line 51 represents a correspondence relationship between the seismic intensity and the degree of abnormality, and is indicated by a proportional relationship in which the output value of the vibration sensor increases and the degree of abnormality increases as the seismic intensity increases. That is, from FIG. 3, the seismic intensity and the degree of abnormality correspond one-to-one, and the seismic intensity Y1 corresponds to the first set value Z1 in the degree of abnormality.

  From FIG. 3, in the range 40 that is less than the seismic intensity Y1, the power control unit 8 does not determine that an abnormality has occurred because the degree of abnormality is less than the first set value Z1, and the charge amount of the storage battery 5 is appropriate. Charge / discharge control is performed so as to be in the range 32. On the other hand, in the range 41 that is greater than or equal to the seismic intensity Y1, the power control unit 8 determines that an abnormality has occurred because the degree of abnormality is greater than or equal to the first set value Z1, and is set by limiting the charging of the storage battery 5 Discharge to charge amount X3 or less.

  That is, when the power control unit 8 receives a signal from the abnormality detection unit 9 and determines that an abnormality due to a disaster that has occurred around the storage battery control device 6 or the storage battery control device 6 has occurred based on the signal, Electric power stored in the storage battery 5 is consumed by an electric power consumption unit 13 to be described later, and the electric energy of the storage battery is reduced below the set charge amount X3. By discharging to a set charge amount X3 or less, the possibility of a secondary disaster can be reduced. If the storage battery 5 is discharged to less than the lower limit charge amount X2, it is highly likely that the storage battery 5 will not function properly as a secondary battery even if recharge is performed thereafter. However, the charge amount of the storage battery 5 is set to the set charge amount X3. The possibility of a secondary disaster can be further reduced as compared with the case of the lower limit charge amount X2 or more.

  Next, an example of detecting an abnormality due to various disasters will be specifically described. When a water immersion sensor is used as the abnormality detection unit 9, it is possible to detect inundation due to a tsunami or storm damage. The power control unit 8 determines whether or not the storage battery control device 6 or the periphery of the storage battery control device 6 is flooded based on the signal received from the flooded sensor. The water immersion sensor can determine the presence or absence of water immersion, for example, by conducting water between the terminals by immersing water in plus or minus terminals.

  Further, when the power control unit 8 detects inundation by the inundation sensor, the value of the corresponding degree of abnormality considers, for example, the height of the infiltration sensor provided around the storage battery control device 6 or the storage battery control device 6. Predetermined. For example, the power control unit 8 determines that the degree of abnormality is a predetermined value that is equal to or greater than the first set value Z1 when the inundation sensor provided at 3 cm from the bottom surface detects inundation. In addition, it is preferable that a plurality of water immersion sensors are provided depending on the height.

  When a temperature sensor is used as the abnormality detection unit 9, a temperature increase due to a fire or the like can be detected. The temperature sensor transmits the detected temperature to the power control unit 8, and the power control unit 8 determines whether or not a disaster such as a fire has occurred based on a signal received from the temperature sensor. Here, the power control unit 8 determines the degree of abnormality based on the storage battery control device 6 detected by the temperature sensor or the temperature around the storage battery control device 6. The power control unit 8 determines that the degree of abnormality is a value equal to or higher than the first set value Z1 when the temperature is equal to or higher than a predetermined temperature or when a temperature rise of a predetermined value or more occurs within a predetermined time. The power control unit 8 may make a determination.

  For example, in a normal use state, the temperature of the storage battery control device 6 is about 40 ° C., and the power control unit 8 has raised the temperature of the storage battery control device 6 to 100 ° C. or higher, or a temperature increase of 10 ° C. or more in 5 minutes. When a temperature change such as that observed is detected, the power control unit 8 may determine that the degree of abnormality is equal to or greater than the first set value Z1. Similarly, the determination may be made based on the temperature around the storage battery control device 6. As the temperature sensor, a thermistor, a thermocouple, a radiation thermometer, or the like whose resistance value varies with temperature may be used.

  When a gas sensor is used as the abnormality detection unit 9, the presence of a predetermined type of combustible gas can be detected around the storage battery control device 6 or the storage battery control device 6. The power control unit 8 determines whether or not a predetermined type of combustible gas is generated based on the signal received from the gas sensor. The predetermined combustible gas is, for example, carbon monoxide, hydrogen, ammonia or the like, and is not limited to this as long as it is a combustible gas. The power control unit 8 determines the degree of abnormality based on the gas concentration. For example, when the concentration of the combustible gas around the storage battery control device 6 or the storage battery control device 6 detected by the gas sensor is equal to or higher than a predetermined concentration, the degree of abnormality is a value equal to or higher than the first set value Z1. The power control unit 8 may determine that the power is present.

  The abnormality detection unit 9 may have a communication function. By acquiring information on earthquakes, tsunamis, inundation, weather, and the like (including information such as rainfall and warnings) from the Internet or television broadcasts, the power control unit 8 can make early determinations about abnormalities due to disasters.

  The power consuming unit 13 is a high-power electronic component having, for example, a resistor or a coil, which can consume and discharge the power stored in the storage battery 5 mainly by a resistor. The power consuming unit 13 is designed to be a load that can be discharged within a certain time such as 15 minutes or 30 minutes when the maximum power is stored in the storage battery 5.

  The power consuming unit 13 may not only consume the power stored in the storage battery 5 but also have a speaker, a display unit, or the like so that it can notify the surroundings by an alarm or display that an abnormality has occurred. Thereby, evacuation is promoted, and in addition, power consumption can be promoted by driving a speaker or a display unit.

  The cooling device 14 is a device that cools the power consuming unit 13 when the power stored in the storage battery 5 is consumed by the power consuming unit 13, and is provided when the amount of heat generated in the power consuming unit 13 is large. Yes. The cooling device 14 is, for example, a heat sink having a heat radiating fin, a fan, a Peltier element, or a device using a refrigeration cycle. Further, when a fan, a Peltier element, or a device using a refrigeration cycle is used as the cooling device 14, when the power of the storage battery 5 is consumed by the power consumption unit 13, the power consumption of the storage battery 5 is simultaneously consumed. The part 13 is cooled. Therefore, the cooling device 14 also consumes power and can also function as a load that consumes power.

  The forced discharge switch 12 is a switch that is turned on / off by a command from the power control unit 8, and is connected between the power consuming unit 13, the cooling device 14, and the power storage device 4, and a current flows in the on state. In the off state, no current flows. The forced discharge switch 12 is turned off to cut off the connection so that the power stored in the storage battery 5 of the power storage device 4 is not discharged in the case of normal operation where there is no abnormality due to a disaster around the storage battery control device 6 or the storage battery control device 6 It is in the state of. The forced discharge switch 12 is turned on when an abnormality due to a disaster occurs around the storage battery control device 6 or the storage battery control device 6 and a signal to close the connection is received from the power control unit 8. When the switch is turned on, the power consuming unit 13 or the cooling device 14 and the power storage device 4 are electrically connected, and the power stored in the storage battery 5 is consumed and discharged by the power consuming unit 13.

  The operation unit 10 is configured with various switches, a receiving device that receives infrared rays, or a touch panel. When the operation unit 10 receives an input from the outside, the operation unit 10 transmits a signal based on the input content to the power control unit 8. The user performs various settings of the storage battery control device 6 via the operation unit 10. In addition, when the operation unit 10 is a touch panel, the user can perform various settings of the storage battery control device 6 via the operation unit 10, and can simultaneously check various states of the storage battery control device 6 with the operation unit 10. it can.

  In the first embodiment of the present invention, an example in which the solar panel 2 is used as the solar power generation system 1 has been shown. However, the solar battery 2 is not used and the storage battery 5 is charged by supplying power from the system power supply 20. You may go alone. Further, instead of or in addition to the solar panel 2, a household simple power generator that generates power using a wind power generator, micro hydroelectric power, gasoline, or the like may be used.

  Next, a specific operation of the photovoltaic power generation system 1 according to Embodiment 1 of the present invention will be described. FIG. 4 is a flowchart for explaining an abnormality confirmation process of the power control unit 8 of the storage battery control device 6 according to Embodiment 1 of the present invention.

  The flowchart of FIG. 4 starts when the power control unit 8 receives a signal from the abnormality detection unit 9. In step ST101, the power control unit 8 confirms whether or not the photovoltaic power generation system 1 operates normally and can perform normal operation. The electric power control part 8 progresses to step ST102, when it has confirmed that the solar power generation system 1 operate | moves normally. On the other hand, when determining that the solar power generation system 1 does not operate normally, the power control unit 8 proceeds to step ST103.

  In step ST <b> 102, the power control unit 8 determines whether an abnormality due to a disaster has occurred around the storage battery control device 6 or the storage battery control device 6 based on the signal from the abnormality detection unit 9. That is, the power control unit 8 determines that an abnormality has occurred when the degree of abnormality determined based on the signal from the abnormality detection unit 9 is equal to or greater than the first set value Z1. If the power control unit 8 determines that an abnormality has occurred, the process proceeds to step ST105, and if it determines that no abnormality has occurred, the process proceeds to step ST104.

  In step ST103, the power control unit 8 disables the charge / discharge function of the storage battery 5. Then, the flowchart ends.

  In step ST <b> 104, the power control unit 8 enables the charge / discharge function of the storage battery 5. Then, the flowchart ends. In step ST104, the charge / discharge function of the storage battery 5 can be used, and after the end of the flowchart, the power control unit 8 controls the charge / discharge of the storage battery 5 as usual.

  In step ST <b> 105, the power control unit 8 stops the charging function by the solar panel 2 and the system power supply 20 for the storage battery 5.

  In step ST106, the power control unit 8 outputs a signal for turning on the forced discharge switch 12 in order to discharge the charge amount of the storage battery 5 to the set charge amount X3 or less. When the power control unit 8 confirms that the forced discharge switch 12 is turned on and the amount of charge stored in the storage battery 5 has been consumed by the power consumption unit 13 and has fallen to the set charge amount X3 or less, the forced discharge switch 12 is turned off. Output a signal. And the electric power control part 8 turns off the forced discharge switch 12, stops the discharge from the storage battery 5, and complete | finishes a flowchart.

  In the first embodiment, when the charge amount of the storage battery 5 is reduced to the set charge amount X3 or less, the power control unit 8 is configured such that the charge amount of the storage battery 5 is not less than the lower limit charge amount X2 and not more than the set charge amount X3. The discharge from the storage battery 5 may be stopped, and the discharge from the storage battery 5 may be stopped when the charge amount of the storage battery 5 becomes less than the lower limit charge amount X2. The charge amount of the storage battery 5 may be set appropriately by the user. Moreover, when the charge amount of the storage battery 5 is equal to or less than the set charge amount X3 at the start of step ST106, the forced discharge switch 12 may not be turned on and the flowchart may be ended.

  As described above, the storage battery control device 6 according to Embodiment 1 of the present invention is the storage battery control device 6 that controls charging / discharging of the storage battery 5, and is caused by a disaster that has occurred around the storage battery control device 6 or the storage battery control device 6. When it is determined that an abnormality has occurred based on the signal received from the abnormality detection unit 9 that detects abnormality, the power consumption unit 13 that consumes the power stored in the storage battery 5, and the abnormality detection unit 9, the power consumption The electric power stored in the storage battery 5 in the unit 13 is consumed, and the electric power control unit 8 is provided to reduce the electric energy of the storage battery 5 below the set charge amount.

  Moreover, in the electrical storage system 3 in Embodiment 1 of this invention, it is the storage battery control apparatus 6 which controls charging / discharging of the storage battery 5, Comprising: Abnormality by the disaster which arose around the storage battery control apparatus 6 or the storage battery control apparatus 6 is detected When it is determined that an abnormality has occurred based on the signal received from the abnormality detection unit 9, the power consumption unit 13 that consumes the power stored in the storage battery 5, and the abnormality detection unit 9, the power consumption unit 13 A storage battery control device 6 having a power control unit 8 that consumes the power stored in the storage battery 5 and lowers the power amount of the storage battery 5 below the set charge amount, and a storage battery 5 whose charge / discharge is controlled by the storage battery control device 6 The power storage device 4 having

  Moreover, in the solar power generation system 1 in Embodiment 1 of this invention, it is the storage battery control apparatus 6 which controls charging / discharging of the storage battery 5, Comprising: The abnormality by the disaster which arose around the storage battery control apparatus 6 or the storage battery control apparatus 6 When it is determined that an abnormality has occurred based on the signal received from the abnormality detection unit 9, the power consumption unit 13 that consumes the power stored in the storage battery 5, and the power consumption unit The storage battery control device 6 having the power control unit 8 that consumes the power stored in the storage battery 5 at 13 and lowers the power amount of the storage battery 5 below the set charge amount, and the storage battery control device 6 controls charging / discharging. A power storage system 3 including a power storage device 4 having a storage battery 5, and a solar that generates power by solar power generation by charging the storage battery 5 of the power storage system 3 with power generated by solar power generation. And a panel 2.

  According to such a configuration, for example, in the event of an abnormality due to a disaster such as an earthquake, tsunami, storms and floods, or a fire, the power stored in the storage battery 5 is discharged, and the possibility of a secondary disaster occurring than before is increased. Even if a secondary disaster occurs, the effect of suppressing the scale of the secondary disaster can be obtained.

  In the storage battery control device 6 according to Embodiment 1 of the present invention, the abnormality detection unit 9 is a vibration sensor that measures vibration, and the power control unit 8 generates an abnormality based on a signal from the vibration sensor. It can also be configured to determine whether or not.

  According to such a configuration, an abnormality caused by an earthquake can be detected, and the storage battery 5 can be discharged before the power storage system 3 is damaged due to a collapse of a house due to the earthquake. Therefore, the possibility that a secondary disaster will occur can be reduced as compared to the conventional case, and even if a secondary disaster occurs, the scale of the secondary disaster can be suppressed.

  Moreover, in the storage battery control apparatus 6 in Embodiment 1 of this invention, the abnormality detection part 9 is a submergence sensor which detects the presence or absence of inundation, and the electric power control part 8 is based on the signal from a submergence sensor. It can also be configured to determine whether or not it has occurred.

  According to such a configuration, it is possible to detect abnormality due to water immersion, and it is possible to discharge the storage battery 5 before the power storage system 3 is damaged by water immersion. Therefore, the possibility that a secondary disaster will occur can be reduced as compared to the conventional case, and even if a secondary disaster occurs, the scale of the secondary disaster can be suppressed.

  Moreover, in the storage battery control apparatus 6 in Embodiment 1 of this invention, the abnormality detection part 9 is a temperature sensor which measures temperature, The electric power control part 8 generate | occur | produces abnormality based on the signal from a temperature sensor. It can also be configured to determine whether or not.

  According to such a configuration, abnormality due to fire can be detected, and the storage battery 5 can be discharged before the power storage system 3 becomes hot and damaged. Therefore, the possibility that a secondary disaster will occur can be reduced as compared to the conventional case, and even if a secondary disaster occurs, the scale of the secondary disaster can be suppressed.

  Moreover, in the storage battery control apparatus 6 in Embodiment 1 of this invention, the abnormality detection part 9 is a gas sensor which detects the combustible gas of a predetermined kind, Comprising: The electric power control part 8 is from a gas sensor. It can also be configured to determine whether an abnormality has occurred based on the signal.

  According to such a configuration, it is possible to detect the presence of a predetermined type of combustible gas, and it is possible to prevent damage to the power storage system 3 by discharging the storage battery 5 before igniting the combustible gas. Therefore, the possibility that a secondary disaster will occur can be reduced as compared to the conventional case, and even if a secondary disaster occurs, the scale of the secondary disaster can be suppressed.

  Moreover, in the storage battery control apparatus 6 in Embodiment 1 of this invention, when the electric power of the storage battery 5 is consumed by the electric power consumption part 13, the cooling device 14 which cools the electric power consumption part 13 using the electric power of the storage battery 5 It can also be set as the structure provided with.

  According to such a configuration, when the power stored in the storage battery 5 is consumed, the power consumption unit 13 is cooled by using the power of the storage battery 5 at the same time. Therefore, the cooling device 14 consumes electric power and can also serve as a load that consumes electric power.

Embodiment 2. FIG.
A photovoltaic power generation system 1 according to Embodiment 2 of the present invention will be described with reference to FIGS. In the second embodiment of the present invention, a modification in which the charge amount of the storage battery 5 is changed according to the degree of abnormality will be described. The following description will focus on differences from the first embodiment, and description of the same or corresponding parts will be omitted as appropriate.

  FIG. 5 is an image diagram showing the relationship between the seismic intensity and the degree of abnormality when an earthquake is illustrated as an example of a disaster in the second embodiment of the present invention. FIG. 5 newly adds seismic intensity Y2 and second set value Z2 to FIG. From FIG. 5, as in the case of FIG. 3, the seismic intensity and the degree of abnormality have a one-to-one correspondence, the seismic intensity Y1 corresponds to the first set value Z1 in the degree of abnormality, and the seismic intensity Y2 greater than the seismic intensity Y1 is This corresponds to the second set value Z2 that is larger than the first set value Z1 in the degree of abnormality.

  In FIG. 5, seismic intensity Y1 and seismic intensity Y2 are examples of seismic intensity when a vibration sensor is used as the anomaly detection unit 9, but when an inundation sensor is used as the anomaly detection unit 9, seismic intensity Y1 and seismic intensity Y2 are It is possible to correspond to the height Y1 when flooded and the height Y2 when flooded. Similarly, the seismic intensity Y1 and the seismic intensity Y2 can correspond to the temperature Y1 and the temperature Y2 when the temperature sensor is used as the abnormality detection unit 9, and when the gas sensor is used as the abnormality detection unit 9, the concentration Y1 and the concentration Y2 This can correspond to Y2.

  The power control unit 8 determines the degree of abnormality based on the signal from the abnormality detection unit 9, and the degree of abnormality determined based on the signal from the abnormality detection unit 9 is greater than or equal to the first set value Z1 and the second set value Z2. In the case of less than, the power of the storage battery 5 is consumed by the power consumption unit 13, and the power amount of the storage battery is set to the set charge amount X3 or less and the lower limit charge amount X2 or more (within the second setting range 31). Further, the power control unit 8 determines the degree of abnormality based on the signal from the abnormality detection unit 9, and when the degree of abnormality determined based on the signal from the abnormality detection unit 9 is the second set value Z2 or more, The electric power of the storage battery 5 is consumed by the power consumption unit 13, and the electric energy of the storage battery is set to be less than the lower limit charge amount X2 (in the first setting range 30) outside the appropriate range 32 (overdischarge).

  If the degree of abnormality determined based on seismic intensity is greater than or equal to the first set value Z1 and less than the second set value Z2, for example, it is not assumed that the building in which the storage battery control device 6 is provided will collapse, and after the abnormality has been resolved It is assumed that the storage battery control device 6 is used again. On the other hand, if the degree of abnormality determined based on the seismic intensity is equal to or greater than the second set value Z2, the building where the storage battery control device 6 is located collapses, the storage battery control device 6 becomes the underlay of the building, and a secondary disaster occurs. Assuming that there is a high possibility that it will occur, it is not assumed to be used again.

  When the degree of abnormality determined based on the seismic intensity is equal to or greater than the second set value Z2, the possibility of a secondary disaster can be further increased by discharging the storage battery 5 to below the lower limit charge amount X2 that the storage battery 5 can no longer be used. Can be suppressed. The first set value Z1 and the second set value Z2 are values set in advance according to the type of abnormality.

  For example, the seismic intensity Y1 is temporarily set as seismic intensity 6 and the seismic intensity Y2 is set as seismic intensity 7. Then, when the seismic intensity is seismic intensity 6 or more and less than seismic intensity 7, the power control unit 8 causes the power consuming unit 13 to consume the power of the storage battery 5, and the charge amount of the storage battery 5 is not less than the lower limit charge amount X2 and not more than the set charge amount X3. And On the other hand, when the determined seismic intensity is greater than or equal to seismic intensity 7, the power control unit 8 causes the power consuming unit 13 to consume the power of the storage battery 5 so that the charge amount of the storage battery 5 is less than the lower limit charge amount X2.

  The submersion sensor sets the first set value Z1 and the second set value Z2 for the degree of abnormality according to the storage battery control device 6 or the height of the submersion sensor provided around the storage battery control device 6. That is, the inundation height Y1 detected by the inundation sensor corresponds to the first set value Z1 in the degree of abnormality, and the inundation height Y2 higher than the inundation height Y1 is the first setting in the degree of abnormality. This corresponds to the second set value Z2 that is larger than the value Z1.

  For example, in the power control unit 8, if the inundation sensor provided 3 cm from the bottom surface detects inundation and the infiltration sensor provided 10 cm from the bottom surface does not detect inundation, the degree of abnormality determined by the power control unit 8 is determined. It is determined that the value is greater than or equal to the first set value Z1 and less than the second set value Z2. Further, the power control unit 8 indicates that the degree of abnormality determined by the power control unit 8 is greater than or equal to the second set value Z2 when the water immersion sensors provided at 3 cm and 10 cm from the bottom surface detect water intrusion. to decide.

  When a temperature sensor is used as the abnormality detection unit 9, the degree of abnormality determined by the power control unit 8 is first set according to the temperature of the storage battery control device 6 or the temperature sensor provided around the storage battery control device 6. A value Z1 and a second set value Z2 are set. That is, the storage battery control device 6 detected by the temperature sensor or the temperature around the storage battery control device 6 corresponds to the first set value Z1 in the degree of abnormality when the temperature is Y1, and when the temperature is Y2 higher than the temperature Y1, This corresponds to the second set value Z2 that is larger than the first set value Z1 in the degree of abnormality. For example, the power control unit 8 may set the temperature value of the temperature sensor to 100 ° C. as the first set value Z1 and 120 ° C. as the second set value Z2.

  When a gas sensor is used as the abnormality detection unit 9, for example, the degree of abnormality determined by the power control unit 8 is first set according to the storage battery control device 6 or the concentration of gas provided around the storage battery control device 6. The value Z1 and the second set value Z2 may be set. That is, when the concentration of the storage battery control device 6 detected by the gas sensor or the concentration of the gas surrounding the storage battery control device 6 is the concentration Y1, it corresponds to the first set value Z1 in the degree of abnormality and is a concentration Y2 higher than the concentration Y1. Corresponds to the second set value Z2 which is larger than the first set value Z1 in the degree of abnormality.

  Next, a specific operation of the photovoltaic power generation system 1 according to Embodiment 2 of the present invention will be described. FIG. 6 is a flowchart illustrating an abnormality confirmation process of power control unit 8 of storage battery control device 6 according to Embodiment 2 of the present invention. FIG. 6 corresponds to steps ST101 to ST105 in FIG. 4 and thus will not be described. Steps ST201 to ST206 will be described.

  In step ST201, the power control unit 8 determines whether or not the degree of abnormality determined based on the signal from the abnormality detection unit 9 is equal to or greater than the second set value Z2. When the power control unit 8 determines that the degree of abnormality determined based on the signal from the abnormality detection unit 9 is equal to or greater than the second set value Z2, the process proceeds to step ST203 and is determined based on the signal from the abnormality detection unit 9. If the power control unit 8 determines that the degree of abnormality is less than the second set value Z2, the process proceeds to step ST202.

  In step ST202, the power control unit 8 determines whether the charge amount of the storage battery 5 is larger than or within the range of the lower limit charge amount X2 and the set charge amount X3. When the power control unit 8 determines that the charge amount of the storage battery 5 is greater than or equal to the lower limit charge amount X2 and greater than or equal to the set charge amount X3, the process proceeds to step ST204 and the charge amount of the storage battery 5 is greater than or equal to the lower limit charge amount X2 and set charge amount. When the power control unit 8 determines that it is X3 or less, the process proceeds to step ST205.

  In step ST204, the power control unit 8 discharges the storage battery 5, and outputs a signal for turning on the forced discharge switch 12 in order to set the charge amount of the storage battery 5 to the lower limit charge amount X2 or more and the set charge amount X3 or less. The power control unit 8 confirms that the forced discharge switch 12 is turned on, the power of the storage battery 5 is consumed by the power consumption unit 13, and the charge amount of the storage battery 5 has decreased to the lower limit charge amount X2 or more and the set charge amount X3 or less. Then, a signal for turning off the forced discharge switch 12 is output. Then, the forced discharge switch 12 is turned off and the discharge from the storage battery 5 is stopped.

  In step ST205, the power control unit 8 confirms whether or not a signal indicating that the abnormality due to the disaster that has occurred around the storage battery control device 6 or the storage battery control device 6 has been resolved has been received. In principle, it is up to the person to determine whether the abnormality has been resolved. For example, if a person around the storage battery control device 6 determines that the abnormality due to the disaster that occurred around the storage battery control device 6 or the storage battery control device 6 has been resolved, the fact that the abnormality has been resolved via the operation unit 10 Is sent to the power control unit 8. Then, when the power control unit 8 receives a signal indicating that the abnormality has been resolved, the power control unit 8 proceeds to step ST206. On the other hand, when the power control unit 8 has not received a signal indicating that the abnormality has been resolved, the power control unit 8 confirms the arrival of the signal at regular time intervals, and executes step ST205 again.

  In step ST206, the electric power control part 8 cancels | releases the stop of the function which charges the storage battery 5, and complete | finishes a flowchart. When the power control unit 8 cancels the stop of the function of charging the storage battery 5, the storage battery 5 can be charged again.

  In step ST203, the power control unit 8 outputs a signal for turning on the forced discharge switch 12 in order to discharge the charge amount of the storage battery 5 from the appropriate range 32 to less than the lower limit charge amount X2. When the power control unit 8 confirms that the forced discharge switch 12 is turned on, the power of the storage battery 5 is consumed by the power consumption unit 13, and the charge amount of the storage battery 5 has decreased to less than the lower limit charge amount X2, the forced discharge switch 12 A signal to turn off is output. And the electric power control part 8 turns off the forced discharge switch 12, stops the discharge from the storage battery 5, and complete | finishes a flowchart.

  In step ST203, after turning on the forced discharge switch 12, the power control unit 8 may end the flowchart without turning off the forced discharge switch 12.

  As described above, the power control unit 8 in Embodiment 2 of the present invention determines the degree of abnormality, and when the degree of abnormality is greater than or equal to the first set value and less than the second set value, consumes the power of the storage battery, The power consumption of the storage battery is set to be equal to or less than the set charge amount and greater than or equal to the lower limit charge amount, and when the degree of abnormality is equal to or greater than the second set value, the power of the storage battery is consumed, You can also.

  According to such a configuration, when there is a low possibility that fatal damage or the like occurs in the power storage system 3 due to the influence of a disaster, the power control unit 8 sets the lower limit value of the charge amount at which the storage battery 5 functions properly as a secondary battery. The storage battery 5 can be reused by discharging to near (lower limit charge amount X2) and not less than the lower limit charge amount X2. On the other hand, when there is a high possibility that fatal damage or the like will occur in the power storage system 3 due to a disaster, the lower limit value (lower limit) of the charge amount at which the storage battery 5 functions properly as a secondary battery even if the power control unit 8 performs recharging. The storage battery 5 is discharged so as to be less than the charge amount X2), and the storage battery 5 cannot be reused. However, although the storage battery 5 cannot be reused, since the battery 5 is discharged to less than the lower limit charge amount X2 of the charge amount of the storage battery 5, the possibility of the occurrence of a secondary disaster can be reduced as compared with the case of the lower limit charge amount X2 or more. In other words, the power control unit 8 reduces the possibility of a secondary disaster by changing the charge amount of the storage battery 5 according to the degree of abnormality, and even if a secondary disaster occurs, The scale can be suppressed.

  In addition, the storage battery control device 6 according to Embodiment 2 of the present invention includes an operation unit 10 that receives external input, and the power control unit 8 receives an input signal from the operation unit 10 after determining that an abnormality has occurred. It can also be set as the structure which does not charge the storage battery 5 until it judges that abnormality was cancelled | released based on this.

  According to such a configuration, since charging to the storage battery 5 is not performed until the abnormality is resolved, it is possible to prevent the charge amount of the storage battery 5 from becoming higher than when it is determined that an abnormality has occurred. Therefore, since the charge amount of the storage battery 5 is kept below the charge amount of the storage battery 5 when it is determined that an abnormality has occurred, the possibility of a secondary disaster occurring can be reduced, Even if this happens, the scale of the secondary disaster can be suppressed.

  Note that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be modified or omitted as appropriate.

DESCRIPTION OF SYMBOLS 1 Solar power generation system 2 Solar panel 3 Power storage system 4 Power storage device 5 Storage battery 6 Storage battery control device 8 Power control part 9 Abnormality detection part 10 Operation part 14 Cooling device

Claims (9)

A storage battery control device for controlling charge / discharge of a storage battery,
An abnormality detection unit for detecting an abnormality caused by a disaster occurring around the storage battery control device or the storage battery control device;
A power consuming unit that consumes the power stored in the storage battery;
When it is determined that the abnormality has occurred based on the signal received from the abnormality detection unit, the power consumption unit consumes the electric power stored in the storage battery, and the electric energy of the storage battery is reduced to a set charge amount or less. And a power control unit for lowering ,
The power control unit determines the degree of abnormality, consumes power of the storage battery when the degree of abnormality is greater than or equal to a first set value and less than a second set value, and sets the amount of power of the storage battery to the set charge. a quantity less and the lower limit charge amount or more, the to consume the power of the battery when the degree of abnormality is greater than or equal the second set value, battery control unit power amount of the battery shall be the lower than the lower limit charge amount. It has an operation unit that receives external input,
The power control unit, since it is determined that the abnormality has occurred, during the period until it is determined that the basis of the input signal from the operation unit abnormality is resolved, in claim 1 which does not charge to the battery Storage battery control apparatus of description. The abnormality detection unit is a vibration sensor that measures vibration,
The power control unit, based on a signal from the vibration sensor, the abnormality storage battery control device according to claim 1 or claim 2 determines whether or not occurred. The abnormality detection unit is a submersion sensor that detects the presence or absence of inundation,
The storage battery control device according to claim 1 or 2 , wherein the power control unit determines whether or not the abnormality has occurred based on a signal from the water immersion sensor. The abnormality detection unit is a temperature sensor that measures temperature,
The power control unit, based on a signal from the temperature sensor, the abnormality storage battery control device according to claim 1 or claim 2 determines whether or not occurred. The abnormality detection unit is a gas sensor that detects a predetermined type of combustible gas,
The power control unit, based on a signal from the gas sensor, the abnormality storage battery control device according to claim 1 or claim 2 determines whether or not occurred. The storage battery control according to any one of claims 1 to 6 , further comprising: a cooling device that cools the power consumption unit using the power of the storage battery when the power consumption unit consumes the power of the storage battery. apparatus. The storage battery control device according to any one of claims 1 to 7 ,
A power storage system comprising: a power storage device having the storage battery whose charge / discharge is controlled by the storage battery control device. The power storage system according to claim 8 ,
A solar power generation system comprising: a solar panel in which electric power generated by solar power generation is charged in the storage battery of the power storage system and performs power generation by the solar power generation.

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