JP2012160410A - Electrolytic solution circulation type battery system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrolytic solution circulation type battery system in which battery efficiency of an electrolytic solution circulation type battery provided together with a power generator utilizing natural energy can be improved.SOLUTION: The electrolytic solution circulation type battery system includes: a power generator 10 utilizing the natural energy; an electrolytic solution circulation type battery 20 provided together with the power generator 10; and a charge/discharge control device 30 which is connected to the electrolytic solution circulation type battery 20 and performs charge/discharge control of the electrolytic solution circulation type battery 20. Then, in this system, a system is provided which supplies electric power of the power generator 10 as a power supply of a pump 230 circulating an electrolytic solution in the electrolytic solution circulation type battery 20, and the output of the pump 230 is controlled in accordance with the power supply amount from the power generator 10.

Description

  The present invention relates to a power generation device using natural energy, an electrolyte flow type battery attached to the power generation device, and a charge / discharge control device connected to the electrolyte flow type battery and performing charge / discharge control of the electrolyte flow type battery. The present invention relates to an electrolyte flow type battery system. In particular, the present invention relates to an electrolyte solution battery system that can improve the battery efficiency of an electrolyte solution battery installed in a power generation device using natural energy.

  Recently, as a measure against global warming, introduction of power generation devices such as solar power generation devices and wind power generation devices using natural energy (renewable energy) such as sunlight and wind power has been promoted worldwide. However, the power generation output of such a power generation device is unstable because the amount of natural energy serving as an energy source varies irregularly depending on time of day, weather, wind conditions, and the like. Therefore, a power storage device is provided with a storage battery, and the output is stabilized by combining the power generation device and the storage battery. In addition, one of the storage batteries provided in the power generation apparatus is an electrolyte solution type battery such as a redox flow battery (see, for example, Patent Documents 1 and 2).

  When a generator that uses natural energy and an electrolyte flow battery are combined, the output of the power generator fluctuates irregularly, so the output of the pump that circulates the electrolyte of the electrolyte flow battery is always constant. It is known that when a battery is operated with a constant flow rate of the electrolyte, there is a problem that loss occurs and battery efficiency decreases (see, for example, Patent Document 1).

  For example, Patent Document 1 discloses a technique for solving such a problem. This technology relates to a method for operating a redox flow battery system combined with a wind power generator. The output of the wind power generator is averaged, and the calculation processing is performed based on the result. The output of the pump for circulating the electrolytic solution is determined. And it is described that according to this technique, battery efficiency can be improved by adjusting the output of a pump according to the output of a wind power generator.

Japanese Patent Laid-Open No. 2003-317763 JP 2007-87829 A

  It is desired to further improve the battery efficiency of the electrolyte circulation type battery attached to the power generation device using natural energy, and to further improve the overall energy efficiency of the entire electrolyte circulation type battery system.

  In the conventional electrolyte circulation type battery system as described in Patent Document 1 described above, an arithmetic device for averaging or calculating the output of the power generation device is necessary, and the output scale of the power generation device It is necessary to change these processes according to the situation. Furthermore, since the output of the power generation device is averaged or arithmetically processed, a time lag is likely to occur until the output of the pump is determined, and there is a difficulty in terms of real-time characteristics (responsiveness) to the output fluctuation of the power generation device.

  The present invention has been made in view of the above circumstances, and one of its purposes is an electrolytic solution that can improve the battery efficiency of an electrolytic solution-flowing battery provided in a power generation device using natural energy. It is to provide a distribution type battery system.

  The first embodiment of the electrolyte flow type battery system according to the present invention is a power generation device using natural energy, an electrolyte flow type battery attached to the power generation device, and an electrolyte flow type battery connected to the electrolyte flow type battery. A charge / discharge control device that performs charge / discharge control of the battery. And it has the system which supplies the electric power of a power generator as a power supply of the pump which distributes the electrolyte in an electrolyte circulation type battery, and controls the output of a pump according to the amount of power supply from a power generator .

  According to this configuration, the power of the power generator is supplied as a power source of the pump, and the output of the pump is controlled according to the output of the power generator by controlling the output of the pump according to the amount of power supplied from the power generator. be able to. Therefore, the battery efficiency can be improved, and thus the overall energy efficiency of the entire system can be improved. Moreover, according to this structure, the averaging process and arithmetic processing which were conventionally required can be made unnecessary, and the real time property with respect to the output fluctuation | variation of an electric power generating apparatus can be ensured. Therefore, the electrolyte flow type battery system according to the first aspect of the present invention can further improve the battery efficiency of the electrolyte flow type battery installed in the power generation device using natural energy, as compared with the prior art. Is possible. Furthermore, according to this configuration, the battery can be operated by driving the pump with the electric power of the power generation device using natural energy.

  In the electrolyte solution battery system of the first embodiment, the flow rate of the electrolyte solution is changed by controlling the output of the pump of the electrolyte solution battery in accordance with the amount of power supplied from the power generation device. Specifically, when the amount of power supplied from the power generator is large, that is, when the output of the power generator is large, the output of the pump is increased to increase the flow rate of the electrolyte, while the amount of power supplied from the power generator is small. That is, when the output of the power generation device is small, the output of the pump is lowered to reduce the flow rate of the electrolyte. Moreover, the output control of the pump can be realized by various methods such as controlling the rotation speed and discharge amount of the pump and controlling the number of operating pumps according to the amount of power supplied from the power generation device. . For example, it is possible to use a variable pump whose output (eg, rotation speed, discharge amount, etc.) can be controlled by supply power (for example, voltage) and supply power directly from the power generator to the pump. In this case, you may have power converters, such as an inverter, and voltage regulators, such as a transformer, according to the pump types (DC type, AC type, etc.) and ratings.

  In the electrolyte solution type battery system of the first embodiment, examples of the power generation device include a solar power generation device using sunlight as natural energy and a wind power generation device using wind power as natural energy.

  As one form in the electrolyte solution type battery system of the 1st form, the system which supplies the electric power of a commercial power supply is used together as a power supply of a pump, and the power supply of a pump is 2 of the system | strain of a generator device and the system of a commercial power supply A first power supply switching unit that switches between the systems is included. This first power source switching means switches the power source of the pump from the power generator system to the commercial power system when there is no power supply from the power generator, and switches the pump power source when there is power supply from the power generator. Switch from the commercial power system to the generator system.

  When power is supplied to the pump only from the power generation device, for example, when the power generation device is not generating power, the power supply from the power generation device to the pump stops and the pump automatically stops. It cannot be driven and the battery cannot be driven. According to this configuration, since the power supply of the commercial power supply is used in combination as the power supply of the pump, and the power supply of the power generator and the power of the commercial power supply are provided, the power supply from the power generator to the pump is provided. Is stopped, it is possible to drive the pump by supplying power from the commercial power source by switching the power source of the pump from the power generation system to the commercial power system.

  Specifically, when there is no power supply from the power generator by the first power source switching means, the power source of the pump is switched from the system of the power generator to the system of the commercial power source, and when power is supplied from the power generator, Switch the power supply of the pump from the commercial power supply system to the power generation system. Here, there is no power supply from the power generation device, for example, a state where the power generation device hardly generates power and the power supply amount from the power generation device has decreased to such an extent that the pump cannot be driven (the power supply amount is almost zero). Say. On the other hand, the power supply from the power generation device means a state in which, for example, the power generation device generates power and the power supply amount from the power generation device is maintained to such an extent that the pump can be driven. Therefore, even when there is no power supply from the power generation device, that is, the power generation device generates little power and the power supply from the power generation device to the pump is stopped, the first power supply switching means causes the power supply of the pump to Is switched from the system of the power generator to the system of the commercial power supply, so that the pump can be driven. On the other hand, when there is power supply from the power generator, that is, when the power generator generates power and power can be supplied from the power generator to the pump, the first power source switching means generates power from the commercial power system. By switching to the system of the apparatus, the pump can be driven. As a result, even when the power supply from the power generation device using natural energy to the pump is stopped, the pump can be driven to operate the battery when necessary, which hinders charging and discharging of the battery. Can be done without.

  In the form in which the power generation device in the electrolyte circulation type battery system of the first embodiment is a solar power generation device, a timer for detecting a time zone is provided, and a system that supplies commercial power as a power source for the pump is used in combination In addition, a second power source switching unit that switches the power source of the pump between the two systems of the power generator system and the commercial power system can be cited. When the time zone detected by the timer is nighttime, the second power source switching means switches the power source of the pump from the power generation system to the commercial power source, and the time zone detected by the timer is other than nighttime. In this case, the pump power source is switched from the commercial power source system to the power generation system.

  When the power generation device is a solar power generation device, little power is generated at night. Therefore, when power is supplied from the solar power generation device to the pump, power supply from the power generation device to the pump stops at night, the pump cannot be driven, and the battery cannot be operated. According to this configuration, a timer for detecting a time zone is provided, and a system for supplying power from a commercial power source is used in combination as a power source for the pump to supply power from the power generator and power from the commercial power source. Therefore, at night when the power supply from the photovoltaic power generation device of the power generation device to the pump is stopped, power is supplied from the commercial power supply by switching the power supply of the pump from the power generation device system to the commercial power supply system. It is possible to drive the pump.

  Specifically, when the time zone is nighttime, the power source of the pump is switched from the power generator system to the commercial power source system by the second power source switching means, and when the time zone is other than nighttime, the pump power source is switched. Is switched from a commercial power system to a power generation system. Therefore, in the nighttime when the solar power generator hardly generates power, the pump can be driven by switching the power source of the pump from the power generator system to the commercial power system by the second power source switching means. On the other hand, when the solar power generation apparatus is not at night when power can be generated, the pump can be driven by switching the power supply of the pump from the commercial power supply system to the power generation system by the second power supply switching means. Thereby, even at night when the solar power generator hardly generates power, the battery can be operated when necessary, and charging / discharging of the battery can be performed without hindrance.

  Next, the second embodiment of the electrolyte flow type battery system of the present invention is connected to a power generation device using natural energy, an electrolyte flow type battery attached to the power generation device, and an electrolyte flow type battery. A charge / discharge control device for performing charge / discharge control of the electrolyte flow type battery. In addition to the power generation device, an auxiliary power generation device that uses the same natural energy as the power generation device is provided, and has a system that supplies power of the auxiliary power generation device as a power source of a pump that distributes the electrolyte in the electrolyte flow type battery. The output of the pump is controlled in accordance with the amount of power supplied from the power generator.

  In the electrolyte flow type battery system of the first form described above, the case where the power of the power generation device is supplied as the power source of the pump has been described. However, the electrolyte flow type battery system of the second form is a power generation device. Separately, an auxiliary power generation device using the same natural energy as that of the power generation device is provided, and power of the auxiliary power generation device is supplied as a power source for the pump. Since this auxiliary power generation device uses the same natural energy as that of the power generation device, power is generated in the same manner as the power generation device in accordance with the amount of natural energy, and the output also varies in the same manner. That is, even with this configuration, the power of the auxiliary power generator is supplied as the power source of the pump, and the output of the pump is controlled according to the output of the power generator by controlling the output of the pump according to the amount of power supplied from the auxiliary power generator. Can be controlled. Also with this configuration, it is possible to eliminate the averaging process and the arithmetic process that were necessary in the past, and to ensure real-time performance against fluctuations in the output of the power generator. Therefore, the electrolytic solution circulation type battery system according to the second aspect of the present invention can achieve the same effects as the electrolytic solution circulation type battery system according to the first aspect.

  In the electrolyte flow type battery system of the second embodiment, as described above, the first point is that power is supplied from the auxiliary power generator to the pump, and the output of the pump is controlled according to the amount of power supplied from the auxiliary power generator. It is different from the electrolytic solution circulation type battery system of the form, and other points can be the same as the electrolytic solution circulation type battery system of the first form.

  In the electrolyte solution type battery system of the second embodiment, examples of the power generation device and the auxiliary power generation device include a solar power generation device using sunlight as natural energy and a wind power generation device using wind power as natural energy. It is done.

  As one mode in the electrolyte flow type battery system of the second mode, a system that supplies power from a commercial power source is used as a power source for the pump, and the power source for the pump is connected to the system of the auxiliary power generator and the system of the commercial power source. It is mentioned that a third power source switching means for switching between the two systems is provided. This third power source switching means switches the power source of the pump from the auxiliary power generator system to the commercial power source system when there is no power supply from the auxiliary power generator, and when there is power supply from the auxiliary power generator. Is switched from the commercial power system to the auxiliary power system.

  According to this configuration, as the power source of the pump, the system that supplies the power of the commercial power source is used in combination, and there are two systems that supply the power of the auxiliary power generator and the power of the commercial power source. When the power supply is stopped, it is possible to drive the pump by supplying power from the commercial power source by switching the power source of the pump from the system of the auxiliary power generator to the system of the commercial power source. Therefore, the effect similar to the form which has the 1st power supply switching means in the electrolyte solution type battery system of the 1st form mentioned above can be expected. Moreover, even when the power supply from the auxiliary power generation device using natural energy to the pump is stopped, the battery can be operated when necessary, and the battery can be charged and discharged without any trouble. . Since the auxiliary power generator is mainly used as a power source for the pump, the scale may be smaller than that of the power generator.

  In the embodiment in which the power generation device and the auxiliary power generation device in the electrolyte circulation type battery system of the second embodiment are solar power generation devices, a timer for detecting a time zone is provided, and power from a commercial power source is supplied as a power source for the pump And a fourth power supply means for switching the power supply of the pump between the two systems of the auxiliary power generation system and the commercial power supply. When the time zone detected by the timer is nighttime, the fourth power source switching means switches the power source of the pump from the auxiliary power generator system to the commercial power source system, and the time zone detected by the timer is other than nighttime. In some cases, the pump power supply is switched from the commercial power supply system to the auxiliary power generation system.

  According to this configuration, a timer for detecting a time zone is provided, and a system for supplying power from a commercial power source is used as a power source for the pump, and two systems for supplying power from the auxiliary power generator and power from the commercial power source are used. Therefore, at night when the power supply to the pump from the photovoltaic power generation device (auxiliary photovoltaic power generation device) of the auxiliary power generation device stops, the pump power supply is switched from the auxiliary power generation system to the commercial power supply system. Thus, it is possible to drive the pump by supplying power from a commercial power source. Therefore, the same effect as the embodiment having the second power source switching means in the electrolyte solution battery system of the first embodiment described above can be expected. In addition, even at night when the auxiliary solar power generation device generates little power, the battery can be operated when necessary, and the battery can be charged and discharged without hindrance. Since the auxiliary solar power generation device is mainly used for the power source of the pump, the scale may be smaller than that of the solar power generation device.

  In the electrolyte solution battery system according to the first and second embodiments described above, the pump power source is switched to a commercial power source system in a mode provided with pump power source switching means (first to fourth power source switching means). In such a case, the electrolyte flow type battery may only discharge.

  When the power source of the pump is switched to a commercial power system, the power generator (solar power generator) is considered to be generating little power, and the battery is discharged to supply power to the power system. Can do.

  As one form of the electrolyte flow type battery system of the present invention, it is mentioned that the electrolyte flow type battery is a redox flow battery.

It does not specifically limit as a redox flow battery, For example, it is mentioned that the electrolyte solution of positive and negative electrodes is either of the following (1)-(5).
(1) The positive electrode electrolyte contains manganese ions, and the negative electrode electrolyte contains at least one metal ion selected from titanium ions, vanadium ions, chromium ions, zinc ions, and tin ions.
(2) The positive electrode electrolyte contains both manganese ions and titanium ions, and the negative electrode electrolyte contains at least one metal ion selected from titanium ions, vanadium ions, chromium ions, zinc ions, and tin ions. .
(3) Each of the positive and negative electrode electrolyte solutions contains both manganese ions and titanium ions.
(4) The positive and negative electrode electrolytes each contain vanadium ions.
(5) The positive electrode electrolyte contains iron ions, and the negative electrode electrolyte contains at least one metal ion selected from titanium ions, vanadium ions, chromium ions, zinc ions, and tin ions.

  By setting the positive and negative electrode electrolytes to any one of the above (1) to (5), a redox flow battery suitable for the electrolyte flow battery system of the present invention can be configured. In particular, as the electrolytic solutions (1) and (2), high electromotive force can be obtained by using manganese ions as the positive electrode active material and titanium ions and vanadium ions listed above as the negative electrode active material. A high electromotive force can be obtained by using manganese ions for the positive electrode active material and titanium ions for the negative electrode active material as the electrolyte solution of (3) above. Furthermore, as the electrolyte solution of the above (2) and (3), the positive electrode active material is manganese ions, and by separately containing titanium ions, a high electromotive force is obtained, and precipitates that increase the battery resistance are obtained. Generation | occurrence | production can be suppressed effectively. As the electrolyte solution of (5) above, a combination in which the positive electrode electrolyte solution contains iron ions and the negative electrode electrolyte solution contains chromium ions is preferable.

  The electrolyte flow type battery of the present invention supplies power to a pump from a power generation device (including an auxiliary power generation device) using natural energy, and controls the output of the pump according to the amount of power supplied from the power generation device. , Battery efficiency can be improved.

It is a schematic diagram for demonstrating the redox flow battery which concerns on Embodiment 1-1. It is a schematic diagram for demonstrating the redox flow battery which concerns on Embodiment 1-2. It is a schematic diagram for demonstrating the redox flow battery which concerns on Embodiment 1-3. It is a schematic diagram for demonstrating the redox flow battery which concerns on Embodiment 2-1. It is a schematic diagram for demonstrating the redox flow battery which concerns on Embodiment 2-2. It is a schematic diagram for demonstrating the redox flow battery which concerns on Embodiment 2-3.

  Embodiments of the present invention will be described with reference to the drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.

(Embodiment 1-1)
1 includes an electric power generation device 10 using natural energy, an electrolytic solution circulation type battery 20, and a charge / discharge control device 30. The electrolytic solution circulation type battery system according to Embodiment 1-1 shown in FIG. It has a system for supplying electric power of the power generation device 10 as a power source of a pump 230 that distributes the electrolytic solution in the distribution type battery 20.

  The power generation device 10 is a device that generates power using natural energy, and in this example, is a solar power generation device or a wind power generation device. The power generator 10 is linked to the commercial power system 60.

  The electrolyte flow type battery 20 is provided in the power generation apparatus 10, and is a redox flow battery in this example. The electrolyte flow type battery 20 includes a battery cell 200. The battery cell 200 is divided into a positive electrode cell 202 and a negative electrode cell 203 by a diaphragm 201 that can transmit ions. The positive electrode cell 202 includes a positive electrode 204, and the negative electrode cell 203 includes a negative electrode 205. Yes. In addition, the electrolyte flow type battery 20 includes an electrolyte solution tank 210 that stores an electrolyte solution for a positive electrode and a negative electrode, and an electrolyte solution tank 210 and a battery cell 200 (a positive electrode cell 202 and a negative electrode cell 203). And a pump 230 that circulates the electrolyte through the flow path 220. The distribution path 220 includes an outward piping 221 for sending the electrolytic solution from the electrolytic solution tank 210 to the battery cell 200 (positive electrode cell 202, negative electrode cell 203), and an electrolytic solution from the battery cell 200 (positive electrode cell 202, negative electrode cell 203). And a return pipe 222 that returns to the tank 210. Then, the pump 230 is activated on each of the positive electrode side and the negative electrode side, so that the electrolyte solution is sent from the electrolyte solution tank 210 to the battery cell 200 via the outward piping 221. The electrolytic solution supplied to the battery cell 200 passes through the inside of the battery cell 200, is returned to the electrolytic solution tank 210 via the return pipe 222, and is circulated. In the battery cell 200, a battery reaction (charge / discharge reaction) is performed. In the electrolyte flow type battery 20 shown in FIG. 1, a vanadium redox flow battery using a vanadium ion aqueous solution as the positive and negative electrode electrolyte is taken as an example. Moreover, the solid line arrow in a battery cell in FIG. 1 shows a charging reaction, and the broken line arrow shows a discharging reaction, respectively.

  In this example, the pump 230 that circulates the electrolyte solution in the electrolyte flow type battery 20 is a variable pump that can control the number of rotations by supplied power (for example, voltage), and directly supplies power from the power generator 10 as a power source. is doing. Therefore, the output of the pump 230 can be controlled in accordance with the amount of power supplied from the power generation device 10, that is, the output of the power generation device 10, and the flow rate of the electrolyte can be changed. Specifically, when the power supply amount from the power generation device 10 is large, that is, when the output of the power generation device 10 is large, the output of the pump 230 is increased to increase the flow rate of the electrolyte, while the power supply from the power generation device 10 is When the amount is small, that is, when the output of the power generation apparatus 10 is small, the output of the pump 230 is lowered to operate to reduce the flow rate of the electrolyte. In addition, depending on the type of pump 230 (DC type, AC type, etc.) and rating, power is directly supplied from the power generator 10 to the pump 230 via a power converter such as an inverter or a voltage regulator such as a transformer. May be.

  The charge / discharge control device 30 is a device that is connected to the electrolyte flow battery 20 and performs charge / discharge control of the electrolyte flow battery 20. The charge / discharge control device 30 includes, for example, an AC / DC converter. The electrolyte flow type battery 20 is connected between the power generation device 10 and the commercial power system 60 via the charge / discharge control device 30.

  In the electrolyte flow-through battery system according to Embodiment 1-1 described above, the power of the power generation device 10 is supplied as the power source of the pump 230, and the output of the pump 230 is controlled according to the amount of power supplied from the power generation device 10. Thus, the output of the pump 230 can be controlled in accordance with the output of the power generation device 10. Therefore, the battery efficiency can be improved, and thus the overall energy efficiency of the entire system can be improved. In addition, in the electrolyte solution type battery system, it is possible to eliminate the averaging process and the arithmetic process which are conventionally required, and it is possible to ensure the real-time property with respect to the output fluctuation of the power generation apparatus 10. Furthermore, in this electrolyte solution type battery system, the battery can be operated by driving the pump 230 with the electric power of the power generation apparatus 10 using natural energy.

(Embodiment 1-2)
2 uses the system that supplies power from the commercial power system (commercial power supply) 60 as the power source of the pump 230, and generates power from the pump 230. The point that the first power supply switching means 71 that switches between the two systems of the system of the apparatus 10 and the system of the commercial power supply 60 is provided is the electrolyte solution battery system according to Embodiment 1-1 described with reference to FIG. Is different. Therefore, here, it demonstrates centering around difference with the electrolyte solution type | mold battery system which concerns on Embodiment 1-1.

  In this electrolyte circulation type battery system, the power supply of the commercial power source 60 is used in combination as the power source of the pump 230, and the power source of the power generator 10 and the power of the commercial power source 60 are provided. The first power supply switching means 71 can switch the power supply of the pump 230 between the two systems. When power supply from the power generation device 10 to the pump 230 is stopped (for example, when the power generation device 10 is not generating power), the power supply of the pump 230 is changed from the power generation device 10 system to the commercial power supply 60 system. By switching, it is possible to supply electric power from the commercial power source 60 and drive the pump 230.

  The first power supply switching unit 71 switches the power supply of the pump 230 from the system of the power generation apparatus 10 to the system of the commercial power supply 60 when there is no power supply from the power generation apparatus 10. Further, when there is power supply from the power generation apparatus 10, the power supply of the pump 230 is switched from the system of the commercial power supply 60 to the system of the power generation apparatus 10. In this example, the first power supply switching means 71 detects the amount of power supplied from the power generation apparatus 10 and automatically switches the pump power supply system. Further, in this example, the absence of power supply from the power generation device 10 means that the power generation device 10 generates little power and the amount of power supplied from the power generation device 10 to the pump 230 is reduced to the extent that the pump 230 cannot be driven. Say. On the other hand, the power supply from the power generation device 10 means that the power generation device 10 generates power and the power supply amount from the power generation device 10 is maintained to such an extent that the pump 230 can be driven. Therefore, even when there is no power supply from the power generation apparatus 10, that is, the power generation apparatus 10 hardly generates power and the power supply from the power generation apparatus 10 to the pump 230 stops, the first power supply switching means 71. Thus, the pump 230 can be driven by switching the power source of the pump 230 from the system of the power generation apparatus 10 to the system of the commercial power source 60. On the other hand, when there is power supply from the power generation apparatus 10, that is, when the power generation apparatus 10 generates power and power can be supplied from the power generation apparatus 10 to the pump 230, the first power supply switching means 71 switches the power supply of the pump 230 on. The pump 230 can be driven by switching from the system of the commercial power supply 60 to the system of the power generation apparatus 10.

  In the electrolyte circulation type battery system according to the embodiment 1-2 described above, even when the power supply from the power generation apparatus 10 using natural energy to the pump 230 is stopped, the pump is used when necessary. The battery can be operated by driving 230, and charging / discharging of the battery can be performed without any trouble. In addition, when the power source of the pump 230 is switched to the system of the commercial power source 60, since the power generation device 10 hardly generates power, the electrolyte flow-through battery 20 only discharges via the charge / discharge control device 30, and Electric power may be supplied to the electric power system 60.

(Embodiment 1-3)
The electrolytic solution circulation type battery system according to Embodiment 1-3 shown in FIG. 3 is a photovoltaic power generation device in which the power generation apparatus 10 in the electrolytic solution circulation type battery system according to Embodiment 1-1 described with reference to FIG. This is the case of 101. In addition, a timer 80 for detecting the time zone is provided, and a power supply for the commercial power system (commercial power) 60 is used as a power source for the pump 230. The point which is provided with the 2nd power supply switching means 72 which switches between two systems, and the system of the commercial power supply 60, is different from the electrolyte flow type battery system according to Embodiment 1-1. Therefore, here, it demonstrates centering around difference with the electrolyte solution type | mold battery system which concerns on Embodiment 1-1.

  In this electrolyte circulation type battery system, the power supply of the commercial power source 60 is used as the power source of the pump 230, and two systems for supplying the power of the photovoltaic power generation apparatus 101 and the power of the commercial power source 60 are provided. The power source of the pump 230 can be switched between the two systems by the second power source switching means 72. Then, by providing a timer 80 for detecting the time zone, the power supply of the pump 230 is switched from the system of the solar power generation apparatus 101 to the commercial power supply 60 at night when the power supply from the solar power generation apparatus 101 to the pump 230 is stopped. By switching to this system, it is possible to supply electric power from the commercial power supply 60 and drive the pump 230.

  The second power supply switching means 72 switches the power supply of the pump 230 from the system of the solar power generation device 101 to the system of the commercial power supply 60 when the time zone detected by the timer 80 is nighttime. When the time period detected by the timer 80 is other than nighttime, the power source of the pump 230 is switched from the system of the commercial power source 60 to the system of the photovoltaic power generation apparatus 101. In this example, the timer 80 is connected to the second power supply switching means 72, and the time zone detected by the timer 80 is input to the second power supply switching means 72 as a signal. Therefore, in the nighttime when the photovoltaic power generation apparatus 101 hardly generates power, the pump 230 is switched by switching the power supply of the pump 230 from the system of the photovoltaic power generation apparatus 101 to the system of the commercial power supply 60 by the second power supply switching means 72. Can be driven. On the other hand, when the solar power generation apparatus 101 is not capable of generating electricity at night, the pump 230 is switched by switching the power source of the pump 230 from the system of the commercial power supply 60 to the system of the solar power generation apparatus 101 by the second power source switching means 72. Can be driven.

  In the electrolyte flow type battery system according to Embodiment 1-3 described above, the battery can be operated by driving the pump 230 when necessary even at night when the photovoltaic power generation apparatus 101 generates little power. The battery can be charged and discharged without any problem. In addition, when the power source of the pump 230 is switched to the system of the commercial power source 60, the photovoltaic power generation device 101 hardly generates power, so the electrolyte flow type battery 20 only discharges via the charge / discharge control device 30. Alternatively, power may be supplied to the commercial power system 60.

(Embodiment 2-1)
The electrolyte flow type battery system according to Embodiment 2-1 shown in FIG. 4 includes an auxiliary power generation device 11 that uses the same natural energy as the power generation device 10, separately from the power generation device 10. The point which has the system | strain which supplies the electric power of the auxiliary power generation apparatus 11 differs from the electrolyte solution distribution type battery system which concerns on Embodiment 1-1 demonstrated using FIG. Therefore, here, it demonstrates centering around difference with the electrolyte solution type | mold battery system which concerns on Embodiment 1-1.

  This electrolyte flow type battery system is different from the electrolyte flow type battery system according to Embodiment 1-1 in that power is supplied from the auxiliary power generation device 11 to the pump 230 instead of the power generation device 10, and auxiliary power generation is performed. The output of the pump 230 is controlled according to the amount of power supplied from the device 11. Since the auxiliary power generation device 11 uses the same natural energy as the power generation device 10, the auxiliary power generation device 11 generates power in the same manner as the power generation device 10 according to the amount of natural energy, and the output also varies in the same manner.

  In the electrolyte flow type battery system according to Embodiment 2-1 described above, the power of the auxiliary power generation device 11 is supplied as the power source of the pump 230, and the output of the pump 230 according to the power supply amount from the auxiliary power generation device 11 By controlling this, the output of the pump 230 can be controlled in accordance with the output of the power generation device 10. Therefore, the battery efficiency can be improved, and thus the overall energy efficiency of the entire system can be improved. In addition, in the electrolyte solution type battery system, it is possible to eliminate the averaging process and the arithmetic process which are conventionally required, and it is possible to ensure the real-time property with respect to the output fluctuation of the power generation apparatus 10. Furthermore, in this electrolyte solution type battery system, the battery can be operated by driving the pump 230 with the electric power of the auxiliary power generator 11 using natural energy. Since the auxiliary power generator 11 is mainly used as a power source for the pump 230, the scale may be smaller than that of the power generator 10.

(Embodiment 2-2)
In the electrolyte circulation type battery system according to Embodiment 2-2 shown in FIG. 5, the power source of the commercial power system (commercial power source) 60 is used as the power source of the pump 230, and the power source of the pump 230 is assisted. The electrolyte flow type battery system according to Embodiment 2-1 described with reference to FIG. 4 is that the third power supply switching means 73 for switching between the two systems of the power generation apparatus 10 and the commercial power supply 60 is provided. Is different. Moreover, the point which uses together the system which supplies the electric power of the commercial power supply 60, and has two systems of the power supply of the pump 230 is the same as that of the electrolytic solution circulation type battery system which concerns on Embodiment 1-2 demonstrated using FIG. is there. Therefore, here, the description will focus on differences from the electrolyte solution battery system according to Embodiment 1-2 and Embodiment 2-1.

  In this electrolyte circulation type battery system, the power supply of the commercial power supply 60 is used in combination as the power supply of the pump 230, and there are two systems for supplying the power of the auxiliary power generator 11 and the power of the commercial power supply 60. The third power source switching means 73 can switch the power source of the pump 230 between the two systems. When the power supply from the auxiliary power generator 11 to the pump 230 is stopped (for example, when the power generator 10 is not generating power), the power source of the pump 230 is switched from the system of the auxiliary power generator 11 to the commercial power source 60. By switching to the system, it is possible to supply electric power from the commercial power source 60 and drive the pump 230.

  The third power supply switching unit 73 switches the power supply of the pump 230 from the system of the auxiliary power generation apparatus 11 to the system of the commercial power supply 60 when there is no power supply from the auxiliary power generation apparatus 11. Further, when there is power supply from the auxiliary power generator 11, the power source of the pump 230 is switched from the system of the commercial power source 60 to the system of the auxiliary power generator 11. Other points are the same as those described in the first power supply switching means 71 in the electrolytic solution circulation type battery system according to the embodiment 1-2. Therefore, even if there is no power supply from the auxiliary power generator 11, that is, the auxiliary power generator 11 generates little power and the power supply from the auxiliary power generator 11 to the pump 230 stops, the third power source By switching the power source of the pump 230 from the system of the auxiliary power generator 11 to the system of the commercial power source 60 by the switching unit 73, the pump 230 can be driven. On the other hand, when there is power supply from the auxiliary power generator 11, that is, when the auxiliary power generator 11 generates power and power can be supplied from the auxiliary power generator 11 to the pump 230, the third power source switching unit 73 causes the pump 230 to The pump 230 can be driven by switching the power source from the commercial power source 60 system to the auxiliary power generator 11 system.

  In the electrolytic solution circulation type battery system according to the embodiment 2-2 described above, even when the power supply from the auxiliary power generation device 11 using natural energy to the pump 230 is stopped, when necessary, The battery can be operated by driving the pump 230, and charging / discharging of the battery can be performed without any trouble. In addition, when the power source of the pump 230 is switched to the system of the commercial power source 60, the power generation device 10 is hardly generating power, so the electrolyte flow-through battery 20 only discharges via the charge / discharge control device 30, and Electric power may be supplied to the electric power system 60.

(Embodiment 2-3)
The electrolyte flow type battery system according to the embodiment 2-3 shown in FIG. 6 is the power generation device 10 and the auxiliary power generation device 11 in the electrolyte flow type battery system according to the embodiment 2-1 described with reference to FIG. Is a solar power generation device (solar power generation device 101 and auxiliary solar power generation device 111). In addition, a timer 80 for detecting the time zone is provided, and a power supply for the commercial power system (commercial power) 60 is used as a power source for the pump 230. The point that the fourth power source switching means 74 that switches between the two systems of the system and the commercial power source 60 is provided is different from the electrolyte flow-through battery system according to Embodiment 2-1. Further, the point that a timer 80 for detecting a time zone is provided, a system for supplying power from the commercial power source 60 is used in combination, and two power sources for the pump 230 are provided is described in the first embodiment described with reference to FIG. 3 is the same as the electrolyte flow type battery system. Therefore, here, it demonstrates centering around difference with the electrolyte solution distribution type battery system which concerns on Embodiment 1-3 and Embodiment 2-1.

  In this electrolyte circulation type battery system, the power supply of the commercial power source 60 is used as the power source of the pump 230, and there are two systems for supplying the power of the auxiliary solar power generation device 111 and the power of the commercial power source 60. Thus, the fourth power source switching means 74 can switch the power source of the pump 230 between the two systems. In addition, by providing a timer 80 that detects the time zone, the power supply of the pump 230 is commercialized from the system of the auxiliary solar power generation device 111 at night when the power supply from the auxiliary solar power generation device 111 to the pump 230 is stopped. By switching to the system of the power supply 60, it is possible to supply power from the commercial power supply 60 and drive the pump 230.

  The fourth power source switching means 74 switches the power source of the pump 230 from the auxiliary solar power generation device 111 system to the commercial power source 60 system when the time zone detected by the timer 80 is nighttime. Further, when the time zone detected by the timer 80 is other than nighttime, the power source of the pump 230 is switched from the system of the commercial power source 60 to the system of the auxiliary solar power generator 111. The other points are the same as described in the second power supply switching means 72 in the electrolyte flow type battery system according to Embodiment 1-3. Therefore, at night when the auxiliary solar power generation device 111 hardly generates power, the fourth power source switching means 74 switches the power source of the pump 230 from the system of the auxiliary solar power generation device 111 to the system of the commercial power source 60. 230 can be driven. On the other hand, when the auxiliary solar power generation device 111 is not at night when power can be generated, the fourth power source switching means 74 switches the power source of the pump 230 from the commercial power source 60 system to the auxiliary solar power generation device 111 system. The pump 230 can be driven.

  In the electrolytic solution circulation type battery system according to Embodiment 2-3 described above, the battery is operated by driving the pump 230 when necessary even at night when the auxiliary solar power generation device 111 hardly generates power. The battery can be charged and discharged without any problem. In addition, when the power source of the pump 230 is switched to the system of the commercial power source 60, the photovoltaic power generation device 101 hardly generates power, so the electrolyte flow-through battery 20 only discharges via the charge / discharge control device 30. Alternatively, power may be supplied to the commercial power system 60.

  Note that the present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the gist of the present invention. For example, you may change suitably the kind of electrolyte solution, the kind of pump, etc. of an electrolyte solution flow type battery (redox flow battery).

  The electrolytic solution circulation type battery system of the present invention can be suitably used for an electrolytic solution circulation type battery system provided in addition to a power generation device using natural energy.

10 Power generator 101 Solar power generator
11 Auxiliary power generator 111 Auxiliary solar power generator
20 Electrolyte flow type battery (Redox flow battery)
200 battery cells
201 Diaphragm 202 Positive electrode cell 203 Negative electrode cell
204 Positive electrode 205 Negative electrode
210 Electrolyte tank
220 Distribution channel 221 Outward piping 222 Return piping
230 Pump
30 Charge / discharge controller
60 Commercial power system (commercial power)
71 1st power supply switching means 72 2nd power supply switching means
73 Third power source switching means 74 Fourth power source switching means
80 timer

Claims (12)

A power generation device using natural energy; an electrolyte flow-through battery attached to the power generation device; a charge / discharge control device connected to the electrolyte flow-through battery and performing charge / discharge control of the electrolyte flow-through battery; An electrolyte flow type battery system comprising:
As a power source of a pump that distributes the electrolyte in the electrolyte flow type battery, a system that supplies power of the power generation device,
The electrolyte circulation type battery system, wherein the output of the pump is controlled in accordance with the amount of power supplied from the power generation device.   2. The electrolyte circulation type battery system according to claim 1, wherein the natural energy is sunlight, and the power generation device is a solar power generation device.   The electrolyte solution battery system according to claim 1, wherein the natural energy is wind power, and the power generation device is a wind power generation device. As a power source for the pump, a system that supplies power from a commercial power source is used in combination,
When there is no power supply from the power generator, the power source of the pump is switched from the system of the power generator to the system of the commercial power source, and when power supply from the power generator is present, the power source of the pump is switched to the commercial power source. The electrolyte flow type battery system according to any one of claims 1 to 3, further comprising first power source switching means for switching from a power source system to the power generation device system. With a timer to detect the time zone,
As a power source for the pump, a system that supplies power from a commercial power source is used in combination,
When the time zone detected by the timer is nighttime, the power source of the pump is switched from the power generator system to the commercial power source system, and when the time zone detected by the timer is other than nighttime, 3. The electrolyte circulation type battery system according to claim 2, further comprising a second power source switching unit that switches the power source of the pump from the system of the commercial power source to the system of the power generation device. A power generation device using natural energy; an electrolyte flow-through battery attached to the power generation device; a charge / discharge control device connected to the electrolyte flow-through battery and performing charge / discharge control of the electrolyte flow-through battery; An electrolyte flow type battery system comprising:
Apart from the power generator, an auxiliary power generator using the same natural energy as the power generator,
As a power source of a pump for circulating the electrolyte solution in the electrolyte flow type battery, it has a system for supplying power of the auxiliary power generator,
The electrolyte circulation type battery system, wherein the output of the pump is controlled in accordance with the amount of power supplied from the auxiliary power generator.   7. The electrolyte flow type battery system according to claim 6, wherein the natural energy is sunlight, and the power generation device and the auxiliary power generation device are solar power generation devices.   7. The electrolyte flow type battery system according to claim 6, wherein the natural energy is wind power, and the power generation device and the auxiliary power generation device are wind power generation devices. As a power source for the pump, a system that supplies power from a commercial power source is used in combination,
When there is no power supply from the auxiliary power generator, the power source of the pump is switched from the system of the auxiliary power generator to the system of the commercial power source, and when power is supplied from the auxiliary power generator, the power source of the pump 9. The electrolyte flow type battery system according to claim 6, further comprising a third power source switching unit configured to switch the commercial power source system to the auxiliary power generator system. With a timer to detect the time zone,
As a power source for the pump, a system that supplies power from a commercial power source is used in combination,
When the time zone detected by the timer is nighttime, the power source of the pump is switched from the auxiliary power generator system to the commercial power source system, and the time zone detected by the timer is other than nighttime. 8. The electrolyte flow type battery system according to claim 7, further comprising a fourth power source switching means for switching the power source of the pump from the commercial power source system to the auxiliary power generator system.   The electrolysis according to any one of claims 4, 5, 9, and 10, wherein when the power source of the pump is switched to the system of the commercial power source, the electrolyte flow type battery only discharges. Liquid-flow battery system.   The electrolyte solution flow type battery system according to any one of claims 1 to 11, wherein the electrolyte solution flow type battery is a redox flow battery.

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