JP6687461B2 - Stand-alone solar power generator - Google Patents

Description

  The present invention relates to a stand-alone solar power generation device that supplies only generated power of a solar cell without exchanging power with a power company.

The stand-alone photovoltaic power generator can supply electricity immediately when it is moved to a place that needs power, and is effectively used at events and stalls, especially in the mountains without commercial power supply and in the event of a disaster. As a general example of this, a solar cell module, a battery that stores the generated electricity, and a control device such as an inverter that controls the electricity charged in the battery are mounted on a trolley provided with tires (Patent Document 1). 1) is known.
On the other hand, the applicant first arranged a plurality of solar cell modules on the roof of a rectangular parallelepiped unit house that can be transported by truck, and provided a plurality of batteries, an inverter, and a charge / discharge controller in the room. Has developed a house for construction sites (see Patent Document 2).

JP, 2010-34190, A Utility model registration No. 3176963

The power generated by the photovoltaic power generator is greatly affected by the weather, and there is a difference in the amount of power that can be obtained in summer and winter, so it is difficult to obtain stable power.
Since the solar power generation device of Patent Document 1 can be easily moved, it can be effectively used at a short-time event or a stall. However, since the amount of electric power obtained is small, it is mainly used for lighting, and electric devices such as an air conditioner and a washing machine cannot be used. In addition, in order to increase the amount of power, there is also a solar cell module that is stored in the upper part of the box body and is used by pulling out horizontally in all four directions at the site. The conversion efficiency is poor, and there is a problem that it is extremely reduced especially in winter.

The construction site house of Patent Document 2 can use an indoor light and an air conditioner as soon as the house is transported to the site and installed, and has a sufficient battery capacity even if it rains for three days. Therefore, it can be used for a certain period of time.
However, it is necessary to install the construction site house in a sufficiently sunny place, and it is not uncommon for the installation site to suffer. In addition, since the panel-shaped solar cells are installed on a flat roof, the amount of electric power that can be obtained varies depending on the season, and when the operating voltage of electrical equipment varies, an engine generator etc. must be prepared separately. There is also the problem of having to do so.

  The present invention has been developed in view of the above points, and it is an object of the present invention to provide an independent solar power generation device that can efficiently obtain necessary power.

The stand-alone photovoltaic power generator of the present invention employs the following means in order to achieve the above object. That is, a power generation unit that stores power from a solar cell array fixed to a box having a roof that is inclined in one direction is configured to receive power generated by a plurality of auxiliary battery arrays that are tilted in the vicinity of the power generation unit. In the independent solar power generation device described above, in the power generation unit, a plurality of batteries, each of which has a box body internally provided with a heat insulating material and receives and stores power generated by the solar cell array and the auxiliary battery array, is held in a battery frame , A plurality of charging / discharging controllers for charging and two inverters for converting DC power charged in the battery into AC are connected in parallel to the battery and housed in an equipment shelf, and a ventilation fan is provided at the top of the box. It is provided, and the back wall is equipped with a doorway.

The stand-alone photovoltaic power generator of the present invention comprises a power generation unit and a plurality of auxiliary battery arrays.
The power generation unit is a box body in which a solar cell array having a plurality of solar cell modules mounted on a roof that is inclined in one direction is fixed, and the generated power in the solar cell array is charged and discharged in the box body. A plurality of batteries that are received and stored via the controller and two inverters that convert the DC power charged in the batteries into AC are stored.

Further, the power generation unit is internally provided with a heat insulating material, and a battery frame that holds a plurality of batteries, two inverters, a plurality of charge / discharge controllers, and a device shelf that supports a distribution board are fixedly installed. The upper part of the box is provided with a ventilation fan, and the rear wall is equipped with a doorway .

Further, the auxiliary battery array has the same area (the same number of cells) as the solar battery array of the power generation unit, and is connected to the charge / discharge controller of the power generation unit by a cable. Desirably, as described in claim 3, it comprises a plurality of solar cell modules, each mounted on a rectangular aluminum frame, housed in the power generation unit during transportation, and raised at one end as a fulcrum during use. It is advisable to adopt a structure in which the stay can be inclined and held by the stay.
As the solar cell module of the auxiliary battery array, it is desirable to use the same solar cell module of the solar cell array of the power generation unit. The number of auxiliary battery arrays may be determined according to the required power.
Moreover, it is preferable that the inclination angle can be appropriately changed depending on the place of installation and the season. The inclination of the roof of the power generation unit may be changed, but if the angle is constant, it is desirable to set it to about 40 degrees.

  A battery of a sealed type that does not require maintenance such as replenishment of liquid is used, and the number of batteries may be determined by calculating the maximum necessary amount in consideration of the number of days when the fine weather at that place is lost. It should be noted that there is not always a situation where the power is insufficient, so it is advisable to install some batteries so that they can be taken out for charging.

The charge / discharge controller is a controller that efficiently charges the battery with the power generated by the solar cell array, and has a backflow prevention device that prevents current from flowing from the battery to the solar cell and a function that prevents overcharging of the battery. Use one.
In addition, two inverters are provided so that single-phase AC100V, single-phase 200V, and three-phase 200V can be used.

  The power generation unit and the auxiliary battery array will be manufactured at the factory and transported to the site by truck, and the location where the solar cells are sufficiently exposed to sunlight will be selected and installed by a crane. Electric power can be obtained immediately by connecting electrical equipment to the distribution board.

In the power generation unit of the stand-alone photovoltaic power generator of the present invention, a plurality of batteries, each of which has a box body internally provided with a heat insulating material and receives and stores the generated power of the solar cell array, is held in a battery frame, and is used for charging the batteries. A plurality of charge / discharge controllers and two inverters for converting DC power charged in the battery into AC are connected in parallel to the battery and housed in an equipment shelf, and a ventilation fan is provided at the top of the box. Since the wall is provided with an entrance / exit , AC power can be immediately obtained by transporting it to the destination by truck and installing the solar cell array and the auxiliary cell array in a position where there is sufficient sunlight. Moreover, installation and withdrawal work can be performed in a short time, and any of single-phase 100V, 200V, and three-phase 200V can be supplied as an AC power source. Therefore, in addition to general household electric devices, most electric devices such as power tools for work are also available. Can be used. Further, the number of auxiliary battery arrays can be increased as needed, so that necessary electric tools can be used in duplicate without worrying about power shortage.

In addition, the power generation unit is well ventilated, can withstand the heat of summer, and can be a compact device.

The auxiliary battery array is attached to a rectangular aluminum frame, is housed in the power generation unit during transportation, and is raised at one end as a fulcrum during use to be inclined and held by a stay. Withdrawal work is simple and electricity can be obtained efficiently.

It is an appearance perspective view showing an embodiment of an independent type solar power generation device of the present invention. The same (a) is an external perspective view of a power generation unit, and (b) is a partial cross-sectional view. 3A is an external perspective view when the auxiliary battery array is installed, and FIG. 1B is an external perspective view during transportation and storage. FIG. 3 is an electric wiring diagram of the independent solar power generation device.

An embodiment of the stand-alone photovoltaic power generator of the present invention will be described with reference to FIGS. 1 to 4.
FIG. 1 is a perspective view showing the overall appearance of a stand-alone photovoltaic power generator, and FIG. 2 is a perspective view of a power generation unit 10. 3 is a perspective view of an auxiliary solar cell 20A that is a component of the auxiliary battery array 20. And FIG. 4 is an electrical wiring diagram of an independent solar power generation device.

As shown in FIG. 1, the stand-alone photovoltaic power generation apparatus includes a power generation unit 10 in which a solar cell array 30 is fixedly installed on a sloping roof, and auxiliary solar cells 20A, 20B in which a solar cell module 30a is inclinedly held in the vicinity thereof. Two auxiliary battery arrays 20 each including 20C are configured.
The roof of the power generation unit 10 has a constant inclination, which is 40 degrees here. The inclination angle of the auxiliary battery array 20 can be adjusted appropriately according to the season.

As shown in FIG. 2, the power generation unit 10 has a roof inclined only in one direction and is a box body including a front wall 13, a rear wall 14, left and right side walls 12, and a floor plate 15. A battery array 30 is installed. A door 16 (shutter) is provided in the rear wall 14, a ventilation fan 17 is provided in the upper part of the left and right side walls 12, and a suction fan 18 is provided in the lower part.
The size of the external appearance of the power generation unit 10 is 1,600 mm × 2,300 mm × 2,600 mm (rear wall height) here.

  The solar cell array 30 is one in which three solar cell modules 30a are arranged side by side on the gantry 11, and a single crystal silicon type is used here. The size of the solar cell module 30a is approximately 1,050 mm × 1,600 mm, and the size of the solar cell array 30 is 1,600 mm × 3,147 mm.

The inside of the box of the power generation unit 10 is internally provided with a heat insulating material, a battery frame 37 is fixedly installed on the floor surface, and eight DC 32V, 230Ah batteries 32 are stored.
The battery 32 is an electrolyte absorption type shield structure method (GEL), which prevents the liquid from leaking by gelling the electrolyte so that the liquid does not scatter even if the battery case is damaged. In addition, it uses a completely sealed type that uses an internal pressure control safety valve to prevent ignition and that suppresses the generation of hydrogen gas.

  An equipment shelf 38 is provided near the front wall 13 in the box, and three charging / discharging controllers 31a, 31b, 31c, two inverters 33a, 33b, and circuit breakers 34, 35 for wiring are provided therein. And a distribution board 36 is placed. A relay terminal block is separately provided to simplify the wiring between these devices.

The auxiliary battery array 20 is a series of auxiliary solar cells 20A, 20B, 20C having the same specifications. As shown in FIG. 3A, the auxiliary solar cell 20A includes an aluminum frame 21, a mounting frame 22 fixed to the aluminum frame 21, a mounting member 23 connected to the mounting frame 22 by a hinge 25, and mounting. It is composed of a solar cell module 30a fixed to the member 23 and a support rod 24 for supporting the mounting member 23 at a predetermined angle. The inclination angle of the solar cell module 30a can be changed by changing the locking position of the support rod 24 with the aluminum frame 21.
When carrying the auxiliary solar cells 20A, 20B, 20C, as shown in FIG. 3B, the support rod 24 is removed and the mounting member 23 is brought into close contact with the mounting frame 22 to form a flat plate shape. 20B and 20C are separated and housed in the power generation unit 10.

Since the stand-alone photovoltaic power generator is configured as described above, the electric power generated in the solar cell array 30 of the power generation unit 10 is charged and discharged in the power generation unit 10 as shown in the electrical system diagram of FIG. The battery 32 is charged via the controller 31a. Further, the electric power generated in the auxiliary battery array 20 is also stored in the battery 32 via the charge / discharge controllers 31b and 31c, respectively.
The electric power is supplied from the battery 32 to the alternating current (AC) through the inverters 33a and 33b, and the electric power is supplied to the electric device through the distribution board 36. The distribution board 36 is provided with outlets for single-phase AC 100V, single-phase AC 200V, and three-phase AC 200V power sources, and electric devices are connected to appropriate outlets to receive power.

  The charge / discharge controllers 31a, 31b, 31c are connected to the solar cell array 30 and the auxiliary battery array 20, respectively, and are uniformly distributed to a plurality of batteries 32 for efficient charging, and prevent overcharging of the batteries 32. It also has a function to perform, a function to stably supply a direct current from each battery 32 to the inverters 33a and 33b, and a function to prevent a backflow to the solar cell array 30 and the auxiliary battery array 20.

The inverters 33a and 33b convert a direct current stored in the battery 32 into an alternating current and output the alternating current. Two inverters are provided so that an output voltage of single-phase AC100V, single-phase AC200V, and three-phase AC200V can be used. ing. The electric device is connected to a distribution board 36 including a conversion device to receive power.
In FIG. 4, 34 and 35 are wiring breakers.

The stand-alone photovoltaic power generation device is manufactured and assembled in a factory, the solar cell array 30 is fixedly installed on the roof, and the battery 32, charge / discharge controllers 31a, 31b, 31c, inverters 33a, 33b, and other devices are installed inside. The power supply unit 10 is configured to store the auxiliary solar cells 20A, 20B, and 20C, and the auxiliary solar cells 20A, 20B, and 20C are transported by a truck to an installation place and placed by hanging a crane.
The auxiliary battery array 20 lowers the auxiliary solar cells 20A, 20B, 20C housed in the power supply unit 10 to a predetermined place (a sunny place near the power supply unit 10), and installs them to connect the solar cells. The battery module 30a is raised and tilted and supported by the support rod 24.
The battery 32 is precharged. As a result, electricity can be used immediately, and it can be carried in at midnight. Also, if you want to change the installation location, you can easily move. As for the wiring, as shown in FIG. 4, it is only necessary to connect the cables attached to the auxiliary battery array 20 to the charge / discharge controllers 31b and 31c of the power generation unit 10, respectively.

  The stand-alone photovoltaic power generator of the present invention can be used for household electric appliances such as a lamp, an air conditioner, a water heater, a personal computer, and a work machine of three-phase AC 200V.

  It should be noted that, in the above description of the embodiment, the stand-alone photovoltaic power generation apparatus has been described by showing specific dimensions so that the content of the invention is well understood, but the present invention is not limited to this. Needless to say. Further, although two sets of the auxiliary battery array 20 have been described, the auxiliary battery array 20 can be appropriately increased or decreased depending on the amount of electric power required. In addition, when it increases, it is needless to say that the charge / discharge controller 31 is added.

10 power generation unit 11 mount 12 side wall 13 front wall 14 rear wall 15 floor plate 16 shutter 17 ventilation fan 18 suction fan 20 auxiliary battery array 20A auxiliary solar cell 20B auxiliary solar cell 20C auxiliary solar cell 21 aluminum frame 22 mounting frame 23 mounting member 24 support bar
25 Hinge 30 Solar Cell Array 30a Solar Cell Module 31a Charge / Discharge Controller 31b Charge / Discharge Controller 31c Charge / Discharge Controller 32 Battery 33a Inverter 33b Inverter 34 Wiring Circuit Breaker 35 Wiring Circuit Breaker 36 Distribution Board 37 Battery Frame 38 Equipment Shelf

Claims (1)

A power generation unit for storing electric power from the solar cell array was fixed to a box body having a roof which is inclined in one direction, and to accept the electric power generated by the plurality of auxiliary battery array is installed in an inclined in the vicinity thereof in stand-alone solar power generation device, said power generation unit includes a plurality of battery boxes body has been accumulated receiving generated power of the solar cell array and the auxiliary battery array interior with a heat insulating material is retained in the battery frame, charging to the battery A plurality of charging / discharging controllers and two inverters for converting direct current power charged in the battery into alternating current are connected in parallel to the battery and housed in the equipment shelf , and a ventilation fan is provided on the upper part of the box body. The stand-alone photovoltaic power generation device is characterized by having an entrance on the rear wall.

Images