JP2016103442A - Emergency power source system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a state capable of supplying electric power over a long term in an unused state of a storage battery.SOLUTION: An emergency power source system (10) includes: a metal-air battery (12) capable of supplying electric power to electrical equipment (1); and supply means (30) for supplying an electrolyte to the metal-air battery. The supply means has a storage tank (32) which stores the electrolyte and an on-off valve (36) is provided in a pipeline (34) communicating the metal-air battery and the storage tank. The electrolyte is supplied to the metal-air battery by opening the on-off valve after power failure and then a situation turns into a power generation state. The metal-air battery is always kept in a stand-by state where the electrolyte is not injected, and deterioration and self-discharge can be eliminated.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an emergency power supply system capable of supplying electric power to a metal-air battery.

  In the case of electrical equipment, it may be required to continue operation even in the event of a power failure, etc. In order to respond to such demand, an emergency power supply is installed or externally attached to the electrical equipment. (For example, refer to Patent Document 1). As this emergency battery, a storage battery such as a lithium ion battery, a nickel metal hydride battery, or a lead storage battery is often used.

JP 2007-189813 A JP 2008-198362 A JP 2014-191861 A

  However, in the case of the above-described storage battery, even when it is not used without a power failure, it has been necessary to replace the battery because sufficient power supply cannot be achieved in several years due to deterioration over time. In addition, in order to operate for a long time in an emergency such as a disaster, it is necessary to increase the amount of electricity, and there is a problem that the burden of capital investment increases.

  Moreover, the metal air battery disclosed by patent document 2 and 3 is utilized as an emergency battery. The metal-air battery of Patent Document 2 is formed by enclosing an electrode, a solution, an electrolyte, wiring, and air diffusion paper in a case or a bag. In this metal-air battery, an electrode, a solution, and an electrolyte react instantaneously at the time of use, and a wiring cord is connected to function as a battery. In the metal-air battery of Patent Document 3, a negative electrode is provided in a bag-like separator, and the electrolyte is not injected into the separator in a standby state.

  When the above-described metal-air battery is injected with a liquid (solution, electrolyte) that acts as an ion conduction medium, current continues to flow until the battery capacity is exhausted. Therefore, there is a problem that the frequency of replacement of the metal-air battery becomes high when the metal-air battery is used in the event of a momentary power failure or voltage drop (hereinafter referred to as “instantaneous power failure”) or during a short-time power failure. .

  This invention is made | formed in view of this point, and it aims at providing the emergency power supply system which can be made into the state which can supply electric power for a long term in an unused state.

  It is another object of the present invention to provide an emergency power supply system that can be in a state in which power can be supplied for a long time in an unused state, and can cope with an instantaneous power failure state.

  The emergency power supply system of the present invention includes a metal-air battery capable of supplying power to a predetermined electric device, and supply means for supplying an electrolytic solution to the metal-air battery. As an electrolytic solution supply means, there are a storage tank that stores the electrolytic solution, and a pipe that communicates the metal-air battery and the storage tank.

  According to this configuration, since the metal-air battery is used, it can be maintained for a long time in a state in which sufficient power can be supplied as compared with the above-described storage battery as long as it is unused, that is, in a state in which no electrolyte is supplied. it can. In addition, when supplying power, the energy density can be increased compared to the above-described storage battery, the power supply time can be lengthened, the amount of electricity can be increased, and the burden on the facility can be reduced.

  Furthermore, the emergency power system of the present invention includes a metal-air battery capable of supplying power to a predetermined electrical device, supply means for supplying an electrolyte to the metal-air battery, and a power storage unit capable of supplying power to the electrical device. It is characterized by having. The power storage unit includes a primary battery or a secondary battery, a capacitor, and the like.

  According to this configuration, since the metal-air battery and the power storage unit are used in combination, power can be supplied from the power storage unit to the electrical device without supplying the electrolyte to the metal-air battery in the event of a momentary power failure or short-time power failure. Can do. Therefore, the metal-air battery does not generate power during a momentary power failure or the like, and the opportunity for using the metal-air battery can be reduced. Thereby, the replacement frequency of the metal-air battery can be suppressed, and the maintenance cost can be suppressed because the metal-air battery can avoid the holding deterioration.

  ADVANTAGE OF THE INVENTION According to this invention, a metal air battery can be made into the state which can supply electric power for a long term in an unused state.

It is the schematic which shows the structure of the emergency power supply system which concerns on 1st Embodiment. It is the schematic which shows the structure of the emergency power supply system which concerns on 2nd Embodiment. It is the schematic which shows the structure of the emergency power supply system which concerns on 3rd Embodiment. It is the schematic which shows the structure of the emergency power supply system which concerns on 4th Embodiment. It is the schematic which shows the structure of the emergency power supply system which concerns on 5th Embodiment. It is a functional block diagram of the control means concerning a 5th embodiment. It is a flowchart which shows an example of the flow of the electric power supply from an emergency power supply system. It is the schematic which shows the structure of the emergency power supply system which concerns on 6th Embodiment. It is a flowchart which shows another example of the flow of the electric power supply from an emergency power supply system.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited to the following embodiment, It can deform | transform suitably and implement in the range which does not change the summary. Here, “power failure” includes a state where the voltage value of the power supplied to the electrical device is extremely low, as well as the case where the power supply to the electrical device is completely stopped.

[First Embodiment]
FIG. 1 is a schematic configuration diagram showing an emergency power supply system according to the first embodiment. As shown in FIG. 1, the emergency power supply system 10 according to the first embodiment supplies power by energizing the electrical device 1 during a natural disaster such as a typhoon or a lightning strike or a power failure due to a sudden accident. It is provided so that it can be supplied. The emergency power supply system 10 is a so-called external type that is provided separately from the electrical device 1 and disposed outside the electrical device 1. Examples of the electrical equipment 1 include air conditioning equipment, vending machines, server equipment, data centers including these, lighting equipment, traffic lights, and the like, which are operated by a commercial power source (not shown).

  The emergency power supply system 10 includes a metal-air battery 12 and a supply unit 30 that supplies an electrolytic solution. The metal-air battery 12 includes a positive electrode and a negative electrode provided in a predetermined container, and is normally in a standby state in which no electrolyte is injected. In the metal-air battery 12, electrons are emitted from a negative electrode made of a metal such as magnesium or zinc by supplying an electrolytic solution. In the positive electrode, electrons flowing from the negative electrode are received by oxygen in the atmosphere. Thereby, the metal-air battery 12 is switched from the standby state to the power generation state by supplying the electrolytic solution.

  In the power generation state, since the metal-air battery 12 uses oxygen in the atmosphere at the positive electrode, no electrolyte is required for the reaction of the positive electrode, and the weight of the reactant at the positive electrode can be theoretically reduced to zero. Thereby, compared with secondary batteries, such as a lead storage battery, the weight of electrolyte solution can be made into a half and the energy density can be improved. Further, in the standby state, the electrolyte solution and the electrode are not in contact with each other, so that deterioration and self-discharge as in the primary battery and the secondary battery can be eliminated.

  Here, the electrolytic solution injected into the metal-air battery 12 may be any substance that causes a chemical reaction at the negative electrode, and is composed of water, a solution containing water, or the like. Examples of water-containing solutions include salt water, tap water, rain water, river water, pond water, mud water, sewage, city water, well water, industrial water, sea water, soft drinks, fruit juice, pure water, urine, etc. Can do. Therefore, even in the event of an emergency or the like, even when there are few goods, it is possible to easily supply power from the metal-air battery 12.

  The metal-air battery 12 is connected to the power source 2 of the electric device 1 through the emergency wiring 16. The metal-air battery 12 can supply electric power to the electric device 1 through the emergency wiring 16 by being in the above-described power generation state.

  The supply means 30 includes a storage tank 32 that stores the electrolytic solution, a pipe 34 that connects the storage tank 32 and the metal-air battery 12, and an on-off valve 36 provided in the pipe 34.

  The on-off valve 36 shuts off the electrolyte supplied from the storage tank 32 through the pipe 34 to the metal-air battery 12 in a closed state and allows the supply of the electrolyte in the opened state. The on-off valve 36 is configured to include an electromagnetic valve or an actuator, and is provided so as to be electrically driven by being electrically connected to the power source 2 of the electric device 1 via the wiring 38. The on-off valve 36 is normally in a state of being energized with the power source 2 via the wiring 38, and the valve closing state is maintained by this energization. On the other hand, when the power supply to the power source 2 is cut off, the on-off valve 36 is switched from the closed state to the open state.

  Here, the storage tank 32 is preferably disposed above the metal-air battery 12. As a result, the electrolyte flows into the metal-air battery 12 under its own weight when the on-off valve 36 is open. As a result, the electrolytic solution can be supplied from the storage tank 32 to the metal-air battery 12 without using the power of a pump or the like, and as a result, the configuration of the emergency power supply system 10 can be simplified and the cost can be reduced. In addition, in the supply means 30 of this invention, it does not prevent supplying electrolyte solution using motive power, such as a pump.

  In the above configuration, power is supplied from a commercial power source (not shown) or the like to the power source 2 of the electrical device 1 in a normal state, and the open / close valve 36 is energized from the power source 2 via the wiring 38. Therefore, normally, the on-off valve 36 is in a closed state, and the electrolyte is not supplied from the storage tank 32 to the metal-air battery 12.

  On the other hand, at the time of a power failure, the energization from the power source 2 to the on-off valve 36 is cut off, and the on-off valve 36 is opened. Thereby, the electrolyte solution in the storage tank 32 is supplied to the metal air battery 12 through the piping 34, and the metal air battery 12 will be in an electric power generation state. By this power generation, electric power is supplied from the metal-air battery 12 to the power source 2 through the emergency wiring 16, and the operation of the electric device 1 can be continued.

  As described above, according to the first embodiment, the following effects can be obtained. Normally, it is possible to avoid deterioration of the metal-air battery 12 due to a standby state in which the electrolyte is not supplied to the metal-air battery 12. Thereby, compared with a storage battery, the state which can supply electric power can be maintained over a long term. Moreover, since electric power is supplied by the metal-air battery 12, the energy density can be increased as compared with the storage battery, and the electric capacity can be increased while reducing the weight and size.

  In addition, in the first embodiment, the supply means 30 of the emergency power supply system 10 has the storage tank 32 and supplies the electrolyte solution via the on-off valve 36. It can be in a power generation state. Therefore, electric power can be supplied quickly to the electric device 1 after a power failure, and the operation stop time of the electric device 1 can be shortened.

  Next, other embodiments of the present invention will be described. In the following description, the same reference numerals may be used for the same or equivalent components as those described in the embodiment described before, and the description may be omitted or simplified.

[Second Embodiment]
FIG. 2 is a schematic configuration diagram showing an emergency power supply system according to the second embodiment. As shown in FIG. 2, the emergency power supply system 10 according to the second embodiment is a so-called built-in type that is mounted inside the electric device 1 and is included in the electric device 1. The emergency power supply system 10 according to the second embodiment is configured by using the same supply means 30 as in the first embodiment. Therefore, also in the second embodiment, the same operational effects as in the first embodiment can be achieved. Moreover, in the second embodiment, since the emergency power supply system 10 is mounted on the electric device 1, convenience such as simplification of installation work can be obtained.

  In the first and second embodiments, the on-off valve 36 may be changed to a type that manually opens and closes. In this case, it is confirmed by a person whether or not a power failure has occurred, and the open / close valve 36 is manually operated and opened at the person's judgment, and the electrolytic solution in the storage tank 32 is supplied to the metal-air battery 12. Thereby, when there is no problem even if the operation of the electric device 1 is stopped due to a power failure, it is not necessary to generate the power of the metal-air battery 12, and the metal-air battery 12 can be avoided from being wasted. it can.

[Third Embodiment]
FIG. 3 is a schematic configuration diagram showing an emergency power supply system according to the third embodiment. The emergency power supply system 10 is a so-called external type that is provided separately from the electrical device 1 and disposed outside the electrical device 1. The emergency power supply system 10 includes a metal-air battery 12 and a pipe 14 as a part of supply means.

  The metal-air battery 12 is connected to the power source 2 of the electric device 1 through the emergency wiring 16. The metal-air battery 12 can supply electric power to the electric device 1 through the emergency wiring 16 by being in the above-described power generation state.

  One end of the pipe 14 is connected to the metal-air battery 12. Further, the other end of the pipe 14 is provided so as to be connectable to a storage tank 20 in which an electrolytic solution is stored. The storage tank 20 has a configuration different from that of the emergency power supply system 10 and is connected to the pipe 14 outside the casing or the like constituting the emergency power supply system 10 at the time of a power failure.

  In the above configuration, electric power is normally supplied to the electrical device 1 from a commercial power source (not shown) or the like. On the other hand, after a power failure such as a commercial power source, the storage tank 20 is connected to the pipe 14 by an operator or the like outside the emergency power system 10. Thereby, the electrolyte solution in the storage tank 20 is supplied to the metal air battery 12 through the piping 14, and the metal air battery 12 will be in an electric power generation state. By this power generation, electric power is supplied from the metal-air battery 12 to the electric device 1 through the emergency wiring 16, and the operation of the electric device 1 can be continued.

[Fourth Embodiment]
FIG. 4 is a schematic configuration diagram showing an emergency power supply system according to the fourth embodiment. As shown in FIG. 4, the emergency power supply system 10 according to the fourth embodiment is a so-called built-in type that is mounted inside the electric device 1 and is included in the electric device 1. The emergency power supply system 10 includes a metal-air battery 12 and a pipe 14 as a part of supply means. The metal-air battery 12 is connected to the power source 2 of the electric device 1 through the emergency wiring 16 inside the electric device 1.

  One end of the pipe 14 is connected to the metal-air battery 12, and the other end is provided so as to be connectable to the emergency power supply system 10 and the storage tank 20 outside the electric device 1.

  In the fourth embodiment, when a power failure occurs, power is supplied from the metal-air battery 12 to the power source 2 of the electrical device 1 in the same manner as in the third embodiment. Therefore, the same effects as those of the third embodiment are achieved by the fourth embodiment. Moreover, in the fourth embodiment, since the emergency power supply system 10 is mounted on the electrical device 1, convenience such as simplification of installation work can be obtained.

[Fifth Embodiment]
FIG. 5 is a schematic configuration diagram showing an emergency power supply system according to the fifth embodiment. As shown in FIG. 5, the emergency power supply system 10 according to the fifth embodiment supplies power by energizing the electrical device 1 during a natural disaster such as a typhoon or a lightning strike or a power failure due to a sudden accident. It is provided so that it can be supplied. The emergency power supply system 10 is a so-called external type that is provided separately from the electrical device 1 and disposed outside the electrical device 1. Examples of the electrical equipment 1 include air conditioning equipment, vending machines, server equipment, data centers including these, lighting equipment, traffic lights, and the like, which are operated by a commercial power source (not shown).

  The emergency power supply system 10 includes a metal-air battery 12, a supply unit 30, a power storage unit 50, and a control unit 60. The metal-air battery 12 includes a positive electrode and a negative electrode provided in a predetermined container, and is normally in a standby state in which no electrolyte is injected. In the metal-air battery 12, electrons are emitted from a negative electrode made of a metal such as magnesium or zinc by supplying an electrolytic solution. In the positive electrode, electrons flowing from the negative electrode are received by oxygen in the atmosphere. Thereby, the metal-air battery 12 is switched from the standby state to the power generation state by supplying the electrolytic solution.

  In the power generation state, since the metal-air battery 12 uses oxygen in the atmosphere at the positive electrode, no electrolyte is required for the reaction of the positive electrode, and the weight of the reactant at the positive electrode can be theoretically reduced to zero. Thereby, compared with secondary batteries, such as a lead storage battery, the weight of electrolyte solution can be made into a half and the energy density can be improved. Further, in the standby state, the electrolyte solution and the electrode are not in contact with each other, so that deterioration and self-discharge as in the primary battery and the secondary battery can be eliminated.

  Here, the electrolytic solution injected into the metal-air battery 12 may be any substance that causes a chemical reaction at the negative electrode, and is composed of water, a solution containing water, or the like. Examples of water-containing solutions include salt water, tap water, rain water, river water, pond water, mud water, sewage, city water, well water, industrial water, sea water, soft drinks, fruit juice, pure water, urine, etc. Can do. Therefore, even in the event of an emergency or the like, even when there are few goods, it is possible to easily supply power from the metal-air battery 12.

  The supply means 30 includes a storage tank 32 that stores the electrolytic solution, a pipe 34 that connects the storage tank 32 and the metal-air battery 12, and an on-off valve 36 provided in the pipe 34.

  The on-off valve 36 shuts off the electrolyte supplied from the storage tank 32 through the pipe 34 to the metal-air battery 12 in a closed state and allows the supply of the electrolyte in the opened state. The on-off valve 36 includes an electromagnetic valve or an actuator, and is electrically connected to the control means 60 via the wiring 42 and provided so as to be electrically driven. The on / off valve 36 is controlled to be switched between open and closed by the control means 60 and is normally maintained in a closed state, while being controlled to switch from the closed state to the open state under the conditions described later.

  Here, the storage tank 32 is preferably disposed above the metal-air battery 12. As a result, the electrolyte flows into the metal-air battery 12 under its own weight when the on-off valve 36 is open. As a result, the electrolytic solution can be supplied from the storage tank 32 to the metal-air battery 12 without using the power of a pump or the like, and as a result, the configuration of the emergency power supply system 10 can be simplified and the cost can be reduced. In addition, in the supply means 30 of this invention, it does not prevent supplying electrolyte solution using motive power, such as a pump.

  In the present embodiment, a rechargeable secondary battery such as a lithium ion battery, a lead battery, a nickel metal hydride battery, or a capacitor, a capacitor, or the like is used for power storage unit 50. The power storage unit 50 is electrically connected to the control unit 60 via the wiring 52 and can supply power to the control unit 60 during a power failure. In addition, the power storage unit 50 is electrically connected to the power source 2 of the electrical device 1 via the wiring 54. With this connection, power is supplied from the power source 2 to the power storage unit 50 during normal operation, the power storage unit 50 is charged, and power for operating the electric device 1 is supplied from the power storage unit 50 to the power source 2 during a power failure. It is provided as possible.

  Here, an emergency wiring 56 is connected to the wiring 54 that connects the power storage unit 50 and the power source 2 of the electrical device 1, and the emergency wiring 56 is connected to the metal-air battery 12. Electric power can be supplied from the metal-air battery 12 in the power generation state to the power source 2 and the power storage unit 50 through the emergency wiring 56.

  The control means 60 is electrically connected to the power source 2 of the electrical device 1 via the wiring 58.

  Next, the function of the control means 60 will be described. FIG. 6 is a functional block diagram of the control means. As shown in FIG. 6, the control means 60 includes a power transport unit 61, a voltage measurement unit 62, a power failure detection unit 63, a timer unit 64, and a determination unit 65. In addition to the voltage measuring unit 62, a current measuring unit may be used. In some cases, voltage and current are measured and controlled using a power value calculated from the measured value. The power transport unit 61 includes a circuit having a function of transporting power from the power source 2 and the power storage unit 50 supplied through the wirings 58 and 52 to the on-off valve 36. The voltage measuring unit 62 includes a measuring instrument having a function of measuring a voltage value of power supplied from the power storage unit 50 via the wiring 52. The power failure detection part 63 detects the electric power supplied from the power supply 2, and detects whether the power failure has generate | occur | produced in the commercial power supply not shown. The timer unit 64 measures the time at a predetermined timing. The determination unit 65 has a function of comparing the measurement results of the voltage measurement unit 62 and the timer unit 64 with a predetermined threshold value, and performing power transport switching control in the power transport unit 61 based on the comparison result.

  In the above configuration, electric power is normally supplied to the electrical device 1 from a commercial power source (not shown) or the like. On the other hand, power is supplied from the emergency power supply system 10 at the time of a power failure such as a commercial power supply. The power supply from the emergency power supply system 10 is performed according to the flow described below. FIG. 7 is a flowchart illustrating an example of the flow of power supply from the emergency power supply system 10.

  As shown in FIG. 7, when a power failure occurs in power device 1, power supply from power storage unit 50 to power supply 2 and control means 60 is started (step (hereinafter referred to as “ST”) 101). Moreover, the power supply from the power supply 2 to the control means 60 is stopped by the occurrence of a power failure, and the power failure is detected by the power failure detection unit 63 (ST102). At the timing when the occurrence of a power failure is detected by the power failure detection unit 63, time measurement by the timer unit 64 is started (ST103). Further, voltage measurement unit 62 starts measuring voltage value V of the electric power supplied from power storage unit 50 (ST104).

  The voltage value V measured in ST104 is compared with the voltage value Va serving as a threshold in the determination unit 65 (ST105). The threshold voltage value Va is set in correspondence with the electric capacity of the power storage unit 50, and is a boundary value that is insufficient for operating the electric device 1 because the electric capacity is smaller than a predetermined ratio. The value approximates this. In the comparison of ST105, when the measured voltage value V is less than the threshold voltage value Va (ST105: YES), the determination unit 65 compares the measurement time T measured by the timer unit 64 with the threshold time Ta. (ST106). The time Ta serving as the threshold is a period in which the voltage value V continues to decrease and is less likely to recover from a power failure. Therefore, in the comparison in ST106, when the measured time T is less than the threshold time Ta (ST105: NO), the comparison of the voltage values V and Va in ST105 is repeated.

  In the comparison of ST106, when the measured time T is equal to or greater than the threshold time Ta (ST106: YES), the open / close valve 36 is controlled by the determination unit 65 to change from the closed state to the open state (ST107). . Thereby, the electrolytic solution in the storage tank 32 is supplied to the metal-air battery 12 through the pipe 34 (ST108), and the metal-air battery 12 is in a power generation state. By this power generation, electric power is supplied from the metal-air battery 12 to both the power source 2 and the power storage unit 50 through the emergency wiring 56, and the operation of the electric device 1 can be continued.

  The power supply destination from the metal-air battery 12 may be either the power supply 2 or the power storage unit 50. When power is supplied only from the metal-air battery 12 to the power storage unit 50, power is supplied from the charged power storage unit 50 to the power supply 2.

  As described above, in the fifth embodiment, it is possible to supply electric power from the power storage unit 50 to the electrical device 1 before supplying the electrolytic solution to the metal-air battery 12 to obtain the power generation state. Then, after the power supply from the power storage unit 50 is started, if the voltage value of the power storage unit 50 becomes equal to or higher than the voltage value Va, the open / close valve 36 is maintained in a closed state and the electrolytic solution is supplied to the metal-air battery 12. In this way, the electric device 1 can be normally operated with a commercial power source. As a result, the metal-air battery 12 can be unused in a momentary power failure or short-time power outage with the commercial power supply, the replacement frequency of the metal-air battery 12 can be reduced, and the maintenance cost can be reduced. .

  Moreover, according to 5th Embodiment, there exists an effect described below. Normally, it is possible to avoid deterioration of the metal-air battery 12 due to a standby state in which the electrolyte is not supplied to the metal-air battery 12. Thereby, in the metal air battery 12, the state which can supply electric power can be maintained over a long period of time. Further, when the electric capacity of the power storage unit 50 decreases, the metal-air battery 12 can supply electric power, so that the energy density can be increased, and the electric capacity can be increased while reducing the weight and size. .

  Moreover, in the fifth embodiment, the supply means 30 of the emergency power supply system 10 has the storage tank 32 and supplies the electrolyte solution via the on-off valve 36. It can be in a power generation state.

[Sixth Embodiment]
FIG. 8 is a schematic configuration diagram showing an emergency power supply system according to the sixth embodiment. As shown in FIG. 8, the emergency power supply system 10 according to the sixth embodiment is a so-called built-in type that is mounted inside the electric device 1 and is included in the electric device 1. The emergency power supply system 10 according to the sixth embodiment has the same configuration as the emergency power supply system 10 according to the fifth embodiment except that the installation position is different. Therefore, in the sixth embodiment, the same operational effects as in the fifth embodiment can be obtained, and the emergency power supply system 10 is mounted on the electric device 1, so that the installation work is simplified. Etc. can be obtained.

  In the fifth and sixth embodiments, the on-off valve 36 may be changed to a type that manually opens and closes. In this case, it is confirmed by a person whether or not a power failure has occurred, and the open / close valve 36 is manually operated and opened at the person's judgment, and the electrolytic solution in the storage tank 32 is supplied to the metal-air battery 12. Thereby, when there is no problem even if the operation of the electric device 1 is stopped due to a power failure, it is not necessary to generate the power of the metal-air battery 12, and the metal-air battery 12 can be avoided from being wasted. it can.

  The present invention is not limited to the above embodiment, and can be implemented with various modifications. Moreover, there is no restriction | limiting in particular about the numerical value, dimension, material, and direction which were demonstrated by the said embodiment. Other modifications may be made as appropriate without departing from the scope of the object of the present invention.

  For example, the power supply from the emergency power supply system 10 may be performed according to the flow shown in FIG. FIG. 9 is a flowchart illustrating another example of the flow of power supply from the emergency power supply system.

  In the flowchart of FIG. 9, ST101 to ST103 are performed in the same manner as the flow described in the flowchart of FIG. After ST103, the determination unit 65 compares the time Tb measured by the timer unit 64 with a threshold Tb after the occurrence of a power failure (ST201). The threshold time Tb is the longest period that the electrical device 1 can accept as a non-operating state after a power failure occurs. Therefore, in the comparison of ST201, when the measured time T is less than the threshold time Tb (ST201: NO), the on-off valve 36 is maintained in the closed state, and the power storage unit 50 supplies the power source 2 and the control means 60. The power supply is continued.

  In the comparison of ST201, when the measured time T is equal to or greater than the threshold time Tb (ST201: YES), ST107 and 108 are performed, and the operation of the electric device 1 is continued by supplying power from the metal-air battery 12. Is done. According to such a flow of power supply, the on-off valve 36 is opened after a lapse of a certain time Tb from the occurrence of a power failure. Therefore, before the lapse of the time Tb, the electric device 1 is manually operated or the like. Time to restore the power source 2 can be earned. Therefore, even with this flow, the metal-air battery 12 can be unused in a momentary power failure or a short-time power failure, and the replacement frequency of the metal-air battery 12 can be reduced.

  In the fifth and sixth embodiments, the power storage unit 50 may be a rechargeable secondary battery or a primary battery such as a dry battery. When the power storage unit 50 is a primary battery, power supply from the power source 2 or the metal-air battery 12 is not performed, and replacement is performed when the electric capacity or output voltage of the power storage unit 50 is less than a predetermined value.

  Further, in the fifth embodiment, the power storage unit 50 and the control unit 60 may be changed to a configuration built in the electric device 1.

  Further, the metal-air battery 12 is not limited to one body, and a plurality of metal-air batteries 12 may be provided. The plurality of metal-air batteries 12 may be only connected in parallel, only connected in series, or may employ both parallel connection and series connection according to the output voltage and electric capacity.

  Also, a plurality of metal-air batteries 12 are provided, and supply of the electrolyte to another metal-air battery 12 is started under a predetermined condition after a predetermined time has elapsed since the electrolyte was supplied to at least one metal-air battery 12. May be. As the predetermined condition, the voltage, current, power generation time, etc. of the metal-air battery 12 during power supply are measured, and the measurement result is compared with a predetermined threshold value so that the capacity of the metal-air battery 12 is less than the predetermined value. Can be illustrated. Thereby, the electric power supplied from the metal-air battery 12 can be maintained within a predetermined range for a long time.

  Further, the supply means 30 can be variously modified as long as the electrolytic solution can be supplied to the metal-air battery 12.

  INDUSTRIAL APPLICABILITY The present invention can increase the battery capacity while maintaining a state in which power can be supplied for a long time in an unused state, and can be used for, for example, electrical equipment used for industrial and business purposes.

DESCRIPTION OF SYMBOLS 1 Electric equipment 2 Power supply 10 Emergency power supply system 12 Metal-air battery 14 Piping 20 Storage tank 30 Supply means 32 Storage tank 34 Piping 36 On-off valve 50 Power storage part 60 Control means

Claims (13)

  An emergency power supply system comprising: a metal-air battery capable of supplying power to a predetermined electric device; and supply means for supplying an electrolytic solution to the metal-air battery.   The supply means includes a storage tank for storing an electrolyte solution, and a pipe that communicates the metal-air battery and the storage tank. The pipe is provided with an on-off valve that is electrically driven. The emergency power supply system according to claim 1, wherein opening and closing are switched depending on an energized state.   The supply means includes a storage tank that stores an electrolyte solution, and a pipe that communicates the metal-air battery and the storage tank. The pipe is provided with an open / close valve, and the open / close valve is manually operated. The emergency power supply system according to claim 1, wherein the emergency power supply system is provided to be openable and closable.   4. The emergency power supply system according to claim 2, wherein the open / close valve is opened after a power failure so that an electrolytic solution is supplied to the metal-air battery. 5.   An emergency power supply system comprising: a metal-air battery capable of supplying power to a predetermined electrical device; supply means for supplying an electrolyte to the metal-air battery; and a power storage unit capable of supplying power to the electrical device.   6. The emergency power supply system according to claim 5, wherein the supply unit includes a storage tank for storing the electrolytic solution.   The emergency power supply according to claim 6, wherein an opening / closing valve is provided in a pipe communicating the metal-air battery and the storage tank, and switching of the opening / closing valve is controlled by a control means. system.   The emergency power supply system according to claim 6, wherein an on-off valve is provided in a pipe communicating the metal-air battery and the storage tank, and the on-off valve is provided so as to be manually opened and closed. . The power storage unit supplies power to the electrical device after a power failure,
The control means is characterized in that the electrolytic solution is supplied to the metal-air battery by opening the on-off valve after the voltage of the power storage unit becomes less than a predetermined voltage value for a certain time or more. The emergency power supply system according to claim 7. The power storage unit supplies power to the electrical device after a power failure,
The emergency power supply according to claim 7, wherein the control means opens the on-off valve after a certain time has elapsed since the occurrence of a power failure, whereby the electrolyte is supplied to the metal-air battery. system.   The emergency power supply system according to any one of claims 1 to 10, wherein the electrolytic solution is a solution containing water.   The emergency power supply system according to any one of claims 1 to 11, wherein a plurality of the metal-air batteries are provided and connected in parallel and / or in series.   A plurality of the metal-air batteries are provided, and after the electrolyte is supplied to at least one metal-air battery, the electrolyte is supplied to another metal-air battery when the capacity of the metal-air battery decreases. The emergency power supply system according to any one of claims 1 to 12, characterized in that:

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