WO2011122443A1

WO2011122443A1 - Illumination device

Info

Publication number: WO2011122443A1
Application number: PCT/JP2011/057195
Authority: WO
Inventors: 武中島; 昌宏西村; 貴石川; 賢一森名
Original assignee: 三洋電機株式会社
Priority date: 2010-03-30
Filing date: 2011-03-24
Publication date: 2011-10-06

Abstract

Disclosed is an illumination device provided with a power generator in which power is generated by renewable energy, a storage battery, and a light source, wherein the light is less likely to turn off even during a power outage. Specifically, disclosed is an illumination device provided with a solar cell device (1), a storage battery (2) which is charged by means of the power supplied from the solar cell device (1), an illuminating unit (40) which emits light by means of the power supplied from the storage battery (2), and a control device (3) which controls the charge and discharge of the storage battery (2), wherein the control device (3) is provided with a function for performing a first discharge control in which, during a normal operation, the discharge of the storage battery (2) is stopped while at least a portion of the storage capacity of the storage battery (2) remains, and a second discharge control in which the storage battery (2) is discharged to the discharge lower limit thereof when studying the storage capacity of the storage battery.

Description

Lighting device

The present invention relates to a lighting device using renewable energy (natural energy) such as solar power generation and wind power generation, and relates to a lighting device combining a renewable energy power generation device, a storage battery, and a light source.

Due to environmental issues, there is a growing demand to use renewable energy as a power source for lighting such as street lights and light-emitting outdoor bulletins such as public signs and corporate signs. For example, a system in which power generated by a solar battery is stored in a storage battery and used as a power source at night has been studied.

On the other hand, it is not preferable to turn off the lights for corporate signs and public signs due to their characteristics, and a stable power supply is required.

However, with a power source using renewable energy, the amount of electricity stored in the storage battery is unstable. For example, when a solar cell is used, the amount of electricity stored may be insufficient when it rains.

Therefore, it has been proposed that when the amount of stored electricity is insufficient, the load is reduced, the amount of power consumption is reduced, and the sign is turned off (see, for example, Patent Document 1). However, the device described in Patent Document 1 only suppresses the power consumption, and it is inevitable that the light is turned off when the rain continues.

Also, a method has been proposed in which a commercial power source is provided as a backup power source, and when the storage amount is insufficient, the sign is turned off by supplying power from the commercial power source (see, for example, Patent Document 2).

However, even in the case of Patent Document 2, even if the amount of power storage is insufficient and switching to a commercial power source, if the commercial power source fails, the sign cannot be turned off.

JP 2001-92391 A JP 2007-79959 A

The present invention provides an illumination device that suppresses turning off even at the time of a power failure, etc., in an illumination device that includes at least a power generator using renewable energy, a storage battery, and a light source.

The present invention includes a power generation device using renewable energy, a storage battery charged with power from the power generation device, an illumination unit that emits light with power supplied from the storage battery, and a control unit that controls charging / discharging of the storage battery, The control unit includes a first discharge control for stopping discharge in a state in which at least a part of the storage amount of the storage battery is left during normal operation, and the storage unit when learning the storage capacity of the storage battery. It has the function to perform 2nd discharge control which discharges to the discharge minimum of a storage battery.

In addition, the power generation device may be configured by a solar cell device that can generate a power generation amount that is twice or more the power consumption amount of the illumination unit.

Further, the control unit may be configured to learn the battery capacity by discharging the storage battery to the discharge lower limit and then charging the battery to the charge upper limit.

Further, the control unit can be configured to perform the second discharge control of the storage battery by causing the illumination unit to emit light in the daytime.

The illumination unit may include a plurality of light sources, and the control unit may be configured to perform second discharge control by supplying power to at least some of the plurality of light sources. The controller may be configured to perform second discharge control by supplying power to a light source with high power consumption among the plurality of light sources.

Moreover, this invention is further equipped with the side apparatus operated by the said storage battery other than the said illumination part, The said control part carries out 2nd discharge by driving at least any one of the said illumination part and the said side apparatus. It can be configured to perform control.

In the present invention, it is possible to supply electric power even in the event of a power failure by stopping the discharge with the remaining amount of power stored in the storage battery (first discharge control). Moreover, since it can suppress that the discharge depth of a storage battery becomes excessive by stopping discharge in this way, the lifetime improvement of a storage battery can be anticipated.

In this invention, the control device discharges the storage battery to the discharge lower limit (second discharge control), and then learns the battery capacity by charging the storage battery to the charge upper limit, thereby accurately calculating the remaining amount of power storage. can do.

It is a typical perspective view of the illumination type sign apparatus as an example of the illuminating device concerning 1st Embodiment of this invention. It is a schematic block diagram which shows the whole structure of the illumination type sign apparatus as an example of the illuminating device concerning 1st Embodiment of this invention. It is a block diagram which shows the structure of the illumination type sign apparatus as an example of the illuminating device concerning 1st Embodiment of this invention. It is a flowchart which shows the detail of the normal operation | movement in 1st Embodiment of this invention. It is a flowchart which shows the charging / discharging state of the storage battery at the time of capacity | capacitance learning in 1st Embodiment of this invention. It is a schematic block diagram which shows the whole structure of the illumination type sign apparatus concerning 2nd Embodiment of this invention. It is a schematic block diagram which shows the whole structure of the illumination type signature apparatus concerning 3rd Embodiment of this invention. It is a schematic block diagram which shows the whole structure of the illumination type signature apparatus concerning 4th Embodiment of this invention. It is a block diagram which shows the structure of the illumination type sign apparatus as an example of the illuminating device concerning 5th Embodiment of this invention. It is a block diagram which shows the structure of the illumination type sign apparatus as an example of the illuminating device concerning 6th Embodiment of this invention. It is a schematic block diagram which shows the whole structure of the illuminating device concerning 7th Embodiment of this invention. It is a typical perspective view of the street lamp as an example of the illuminating device concerning 8th Embodiment of this invention.

Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated in order to avoid duplication of description.

FIG. 1 is a schematic perspective view of an illuminating sign device as an example of an illuminating device according to a first embodiment of the present invention, and FIG. 2 is a schematic configuration diagram showing an overall configuration of the illuminating sign device. FIG. 3 is a block diagram showing a configuration of the illumination type sign device.

As shown in FIG. 1 and FIG. 2, in the illumination type sign device according to the first embodiment, the illumination type sign 4 provided with the illumination unit 40 on the attachment unit 50 of the support 5 uses an attachment member 51. Attached. The illumination unit 40 includes, for example, a plurality of light emitting diodes (LEDs) 41, and supplies power to the LEDs 41 to emit light. A translucent milky white acrylic plate 42 is provided on the front surface of the illumination unit 40, and the LED 41 is covered with the acrylic plate 42 to constitute an internally illuminated LED sign that illuminates a sign such as a corporate sign. As this LED 41, for example, a V-cut LED is used, which diffuses light so that a sign can be clearly seen from a short distance and obliquely. As the acrylic plate 42, various acrylic plates such as a colored acrylic plate can be used in addition to a translucent milky white product.

The support 5 is composed of, for example, a support column having a substantially quadrangular prism shape, and is erected with one end side buried in the soil. The other end of the support 5 is attached with a solar cell device 1 as a power generation means for renewable energy.

In the solar cell device 1, one or more solar cell modules are connected in series or in parallel and output predetermined power. The solar cell module includes a plurality of solar cells, and these solar cells are electrically connected and configured to output predetermined power.

As solar cells, various solar cells such as crystalline solar cells using single crystal silicon or polycrystalline silicon, thin film solar cells using amorphous silicon or microcrystalline silicon, and other compound solar cells may be used. it can.

Inside the support 5, a storage battery 2 that is charged by power generated by the solar battery device 1 and a control device 3 are arranged.

In addition, the support 5 is not limited to a support column, and a wall surface of a building or the like is used. The lighting sign 4 is attached to the wall surface, and the solar cell device 1 may be installed on the roof or wall surface of the building. Moreover, the installation location of the storage battery 2 and the control apparatus 3 can also be selected suitably.

The control device 3 controls charging of the power generated by the solar cell device 1 to the storage battery 2 and discharging from the storage battery 2 to the illumination unit 40. That is, the control device 3 supplies the power from the storage battery 2 to the lighting unit 40 to light it, and stops the discharge in a state where the storage battery 2 leaves at least a part of the amount of storage, that is, a state where predetermined power is left. The illumination unit 40 is controlled to be extinguished (first discharge control).

Further, the control device 3 is connected to a commercial power source (power system) as a backup power source 6 via an AC / DC converter 61, and when the power in the storage battery 2 is insufficient, the control device 3 illuminates the power from the backup power source 6. Control to supply.

In this embodiment, renewable energy is used as much as possible, and the backup power source 6 that is a commercial power source is designed to be used as little as possible.

The illumination sign 4 is, for example, one that consumes about 200 W per hour with a plurality of LEDs 41 continuously lit. The illuminated sign 4 is turned off after a specified time to reduce the burden on the surrounding environment and residents, and the lighting time is from sunset (18:00) to 23:00. In this case, the power consumption per day of the illumination device 40 of the illumination type sign 4 is 1 kWh.

The storage battery 2 can be a lithium ion battery or a nickel metal hydride battery. The depth of discharge at which the control device 3 stops discharging is 50%, which is ½ of the storage capacity. In this embodiment, when two days (three days at night) have elapsed on the day without sunshine, the discharge depth of the storage battery 2 reaches 50% and the discharge is stopped. In this case, since the amount of power stored in the storage battery 2 decreases by 3 kWh, it is preferable to use a storage battery having a storage capacity of 6 kWh.

In this embodiment, power can be supplied from the storage battery 2 even in the event of a power failure by stopping the discharge in a state in which the storage battery 2 has a predetermined remaining power storage capacity. Moreover, since the discharge depth can be suppressed from being excessive by stopping the discharge in this manner, the storage battery 2 is also effective in extending the life.

In this embodiment, the predetermined remaining power level is 50%, which is 1/2 of the full charge, but may be changed depending on the power consumption, the storage capacity of the installed storage battery, and the like. For example, in a system in which the amount of power consumption is small relative to the storage capacity, the storage capacity required at the time of a power failure may be small, so that it may be 30% (3/10), for example. In the case of emphasizing emergency use such as a power failure, 70% (7/10) may be used, for example. However, in this case, it is preferable to design so that the power consumption is within 30% of the storage capacity.

The solar cell device 1 uses a solar cell having a power generation amount more than twice the power consumption amount in order to secure a power generation amount that covers the power consumption even on the day when the average amount of sunshine falls below. In this embodiment, assuming that a power generation amount of about 3.5 hours of the rated power generation capacity can be obtained on average per day, a back calculation (1 kWh × 2/3. 5h≈0.6) and a solar cell having a power generation capacity of 600 W is preferably used.

On the other hand, in order to control the storage battery 2 so as to stop discharging in a state where a predetermined remaining amount of stored electricity (for example, 50% of the capacity at full charge) remains, it is necessary to accurately calculate the remaining amount of stored electricity. is there. When the calculated remaining power storage amount and the actual remaining amount are different, it is difficult to supply sufficient power during a power failure. Therefore, in the present invention, the control device 3 has a function capable of accurately calculating the remaining power storage amount.

The configuration of the control device 3 will be further described with reference to FIG. The control device 3 is connected to an illumination unit 40 including a plurality of LEDs 41 of the illumination sign 4.

As shown in FIG. 3, the control device 3 includes a control circuit 30 having a microcomputer as a main component, a charge / discharge circuit 31 that controls charge / discharge of the storage battery 2, and a direct current supplied from the charge / discharge circuit 31. A DC / DC converter 32 that steps up or down to a predetermined voltage, a measurement circuit 33 that measures a terminal voltage of the storage battery 2 and a discharge current and a charge current, a program for controlling this system, various threshold values and the storage battery 2 A memory 34 that stores information such as the remaining amount of electricity stored, the degree of deterioration, etc., a switch circuit 35 that supplies power to the illumination unit 40, a sensor unit 36 that detects illuminance, humidity, temperature, atmospheric pressure, etc., and weather prediction A communication device 37 for obtaining the prediction information from a server or the like providing information or the like via the Internet or the like, and an input device 38 for inputting data such as various conditions.

Further, AC power supplied from the backup power source (power system) 6 is converted into DC power by the AC / DC converter 61 and supplied to the switch circuit 35.

The switch circuit 35 has a function of turning on / off the power to the illumination unit 40 and a function of switching the power from the storage battery 2 and the power from the backup power source 6.

The control circuit 30 monitors the output voltage of the AC / DC converter 61 or the input voltage to the AC / DC converter 61, thereby determining the power system power failure, the temperature, humidity and / or Alternatively, it has a function of predicting weather based on atmospheric pressure. In addition, a timer 30a is provided inside the control circuit 30 and outputs date and time information in the apparatus.

The control circuit 30 has a ratio of n / m (n and m are integers, n <m) of less than 100% with respect to the capacity when the storage battery 2 is fully charged (hereinafter referred to as full charge capacity). Until the voltage drops to. For example, the discharge is performed until it decreases to a predetermined ratio between 50% (1/2) and 80% (4/5). And the control circuit 30 controls the charging / discharging circuit 31 so that discharge will be stopped, if the electrical storage residual amount of the storage battery 2 falls to a predetermined ratio.

In addition, when the power system fails, or when it becomes necessary to discharge the storage battery 2 to the lower limit of discharge, the control circuit 30 changes to the charge / discharge circuit 31 even if the remaining power storage capacity of the storage battery 2 falls below a predetermined ratio. Control to continue discharging.

Here, as a calculation method of the remaining amount of storage, for example, there are a calculation based on a storage battery voltage, a method for monitoring a charge / discharge amount, and the like. However, in the former method using the storage battery voltage, the storage battery voltage changes depending on the ambient temperature or the deterioration degree of the storage battery, and thus accurate determination is difficult. In particular, in a lithium ion battery or a nickel metal hydride battery, it is difficult to accurately detect the remaining amount because the voltage change is small except near the fully charged state or the fully discharged state.

Therefore, as a method for monitoring the remaining amount of electricity stored, a detection resistor (such as a shunt resistor) or a power detection element connected to the power line is provided in the measurement circuit 33, and measurement is performed using these elements. Accumulate and calculate the charge / discharge amount. Here, regarding the calculation of the charge / discharge amount, it is more preferable that the actual charge / discharge amount can be corrected in accordance with the current rate and temperature at that time and the characteristics of the battery used. Thereby, the control circuit 30 monitors the remaining amount of electricity stored. Here, although the case of the current amount is described as the calculation of the remaining amount of power storage, the remaining amount of power storage may be counted by the amount of power by integration with a voltage or the like.

∙ If operation is continued for a long time even if charging / discharging is monitored, there is a problem that an error occurs between the calculated remaining power storage amount and the actual remaining amount. In order to eliminate this error, the present invention constitutes a system having a capacity learning function. As a method of capacity learning, for example, a method of re-recognizing the storage battery capacity by discharging to the lower limit of discharge and then charging to the upper limit of charge may be adopted (hereinafter, this function is referred to as “capacity learning function”). .

The operation of the first embodiment will be described with reference to FIG. 4 and FIG. FIG. 4 is a flowchart showing the details of the normal operation in the first embodiment. In this 1st Embodiment, the control circuit 30 has set the electrical storage residual amount of the storage battery 2 of 50% as a threshold value of control operation | movement.

In step S11, the control circuit 30 determines whether it is within the lighting time by using the output of the sensor unit 36 and the timer 30a in the control circuit 30. That is, it is determined whether it is between 23:00 from sunset. If it is determined that it is within the lighting time, the process proceeds to step S12, and the control circuit 30 determines whether or not the remaining charge Q of the storage battery 2 exceeds 50%. Then, if the remaining power Q exceeds 50%, the process proceeds to step S13, the control circuit 30 instructs the charge / discharge circuit 31 to discharge the power from the storage battery 2, and the power discharged from the storage battery 2 is The charge / discharge circuit 31 supplies the illumination unit 40 via the switch circuit 35, and the illumination type sign 4 is turned on. And it returns to step S11 and repeats the above-mentioned operation | movement. In addition, this lighting time is variously determined by the place where the illumination type sign 4 is installed, the use, etc., and the lighting time is only an example.

When the control circuit 30 determines in step S12 that the remaining battery charge Q of the storage battery 2 is 50% or less, the process proceeds to step S14. In step S14, the control circuit 30 controls the charging / discharging circuit 31, stops the discharge from the storage battery 2, and then proceeds to step S15.

In step S15, the control circuit 30 determines whether it is within the lighting time. If within lighting time, it will progress to step S16, will supply electric power to the illumination part 40 from the backup power supply 6 via the AC / DC converter 61 and the switch circuit 35, and lighting of the illumination type sign 4 will be continued.

On the other hand, when the control circuit 30 determines that it is not the lighting time in step S15, the supply of power from the backup power source 6 is stopped, and the process returns to step S11.

If it is determined in step S11 that the control circuit 30 is not within the lighting time, the process proceeds to step S22. In step S <b> 22, the control circuit 30 determines whether there is a power generation output from the solar cell device 1. If it is determined that there is a power generation output from the solar cell device 1, the process proceeds to step S18, and if it is determined that there is no power generation output, the process returns to step S11.

In step S18, the control circuit 30 determines whether or not the remaining battery charge Q of the storage battery 2 is 100%. When the remaining power Q of the storage battery 2 is not 100%, the process proceeds to step S19. On the other hand, when the remaining amount Q of storage is 100%, there is no need to charge the storage battery 2, so the process proceeds to step S21, the charging is stopped, and the process returns to step S11.

In step S18, when the control circuit 30 determines that the remaining charge Q of the storage battery 2 is less than 100%, the process proceeds to step S19. And in step S19, the control circuit 30 supplies the electric power generation output from the solar cell apparatus 1 to the charging / discharging circuit 31, and charging to the storage battery 2 from the charging / discharging circuit 31 is performed. Then, the process proceeds to step S20. In step S20, the control circuit 30 determines whether or not the remaining battery charge Q of the storage battery 2 has reached 100%. If it does not reach 100%, the control circuit 30 returns to step S19 and repeats charging of the storage battery 2.

On the other hand, when the control circuit 30 determines in step S20 that the remaining charge Q of the storage battery 2 has reached 100%, the control circuit 30 stops charging in step S21 and returns to step S11.

In this way, the operations of the solar cell device 1, the storage battery 2, the backup power source 6, and the illumination sign 4 are controlled.

Next, the operation of the capacity learning function of the present invention will be described with reference to FIG. FIG. 5 is a flowchart showing the operation in the charge / discharge state of the storage battery during capacity learning in the first embodiment of the present invention.

In general, the remaining amount of electricity stored in the storage battery 2 is the integrated value of the charging current to the storage battery based on the lower limit of the dischargeable capacity of the storage battery 2 (lower discharge limit) or the upper limit of the chargeable capacity of the storage battery 2 (upper charge limit). It is carried out by subtracting the integrated value of the discharge current from the storage battery from the battery. For this reason, integration errors are accumulated, and errors such as self-discharge are added to increase the errors over time. Further, the capacity of the battery is reduced by repeated charging and discharging.

Therefore, it is necessary to periodically perform work to correct this error and recheck the capacity. In this operation, after the storage battery 2 is discharged until reaching the lower limit value of the capacity, the storage battery 2 is charged until reaching the upper limit value of the capacity. As specific values of the lower limit of discharge and the upper limit of charge, for example, the value of the lower limit of discharge is approximately 5%, which is close to approximately 0% of the entire battery capacity, and the value of the upper limit of charge is approximately 100% of the entire battery capacity. Can do.

The charge / discharge is not performed at 0 to 100% of the capacity of the rechargeable battery alone, but a value with a margin more than that value is determined as the value of 0% to 100% in this control circuit. It is preferable to reduce the influence on the battery life.

The control circuit 30 stores information such as the battery state (remaining power storage amount, etc.) and the charge / discharge performance in the memory 34. Furthermore, the timing at which capacity learning is necessary is determined from the charge / discharge performance of the storage battery 2 and the like. If the control circuit 30 determines that the capacity learning is necessary, the control circuit 30 controls the charge / discharge circuit 31 on the basis of information on the remaining amount of electricity stored from the storage battery 2. The charging / discharging circuit 31 stops charging the storage battery 2 in accordance with an instruction from the control circuit 30, and the charging / discharging circuit 31 supplies the power of the storage battery 2 to the lighting unit 40 to perform forced discharge (second discharge control). ). In the process in which the remaining amount of electricity stored in the storage battery 2 reaches the upper limit of charge from the lower limit of discharge, the control circuit 30 learns and corrects the value of the remaining capacity of the battery and the value of the chargeable capacity (maximum capacity).

In the operation of the capacity learning function, first, in step S101, the control circuit 30 accesses the memory 34 and checks the necessity of capacity learning. If capacity learning is recognized and capacity learning is activated, the process proceeds to step S102. When the capacity learning is not activated, the operation is terminated.

In step S102, the control circuit 30 instructs the charge / discharge circuit 31 to prohibit the charging of the storage battery 2 and shifts to forced discharge. During forced discharge, the power supply from the solar cell device 1 is cut off, and the storage battery 2 supplies power to the illumination unit 40. When there is another discharge load, the electric power is also discharged to the other discharge load. As a result, the voltage of the storage battery 2 drops with time. When there is an illumination unit 40 and another load, the storage battery 2 discharges the total current with the other load and reaches the next step.

When the control circuit 30 determines in step S103 that the remaining charge Q has reached 5% based on the output from the measurement circuit 33 (detected by the storage battery voltage), the control circuit 30 instructs the charge / discharge circuit 31 in step 104. Then, the forced discharge is stopped, and in step S105, the control circuit 30 corrects the storage battery voltage at this time as the remaining battery charge Q = 5% (discharge lower limit correction).

Next, in step S106, the control circuit 30 instructs the charge / discharge circuit 31 to charge the storage battery 2. When charging progresses and the control circuit 30 determines from the output from the measurement circuit 33 that the remaining amount Q of storage has reached 100% in step S107 (detected by the storage battery voltage), in step S108, the control circuit 30 The storage battery voltage is corrected as the remaining power of 100% (correction of the upper limit of charging), and the control circuit 30 instructs the charging / discharging circuit 31 to stop charging.

The control circuit 30 calculates the maximum capacity (100%) of the storage battery 2 from the current integrated value corresponding to approximately 95%, which is the difference between the above-described lower discharge limit correction (approximately 5%) and the upper charge limit modification (approximately 100%). Is obtained and stored in the memory 34, and the capacity learning ends.

Thereafter, the control circuit 30 enters the normal charge or discharge mode, and measures the remaining amount of power storage by current integration based on the corrected maximum capacity.

As described above, it is desirable for the capacity learning function to update the battery capacity at the time when the charged remaining capacity (for example, the set voltage) set to full charge is reached, and the same applies to the case of complete discharge. However, full charge = 100% and complete discharge = 0% are not necessarily limited. As described above, about 5% of the remaining capacity may be updated with the discharge lower limit for complete discharge. In this manner, the remaining power storage amount can be accurately determined by correcting the remaining power storage amount.

With the configuration described above, it is possible to control the turn-off of the sign and to reduce the amount of backup power used. However, as described above, it is preferable to perform capacity learning for long-term stable operation.

Hereafter, examples of methods for realizing capacity learning will be given. Since charging to the upper limit of charging in a daily operation state can be achieved relatively easily, an example for discharging to the lower limit of discharge first will be shown. During the capacity learning, the discharge stop function for a predetermined amount of power or less is turned off.

First, the first method is to turn on the illuminated sign 4 from daytime and discharge to the lower discharge limit. The illuminated sign 4 is turned on from the daytime period so that the discharge lower limit can be reached in accordance with the time when the sign lighting is turned off. Note that the charging of the storage battery 2 during the daytime period is turned off. Since the illumination sign 4 has a relatively small illuminance, the burden on the surrounding environment due to daytime lighting is small. In particular, when the solar cell voltage exceeds a predetermined value for the discharge in the daytime period (a solar cell that can be judged to be sunny) If you set the voltage threshold level and turn on when the threshold level exceeds the threshold level for a predetermined time, and turn off when the threshold level falls below the predetermined time, the sign will be lit when there is sufficient solar radiation. , The burden on the surrounding environment will be less.

Specifically, the capacity learning function is turned on on the day when the shortage of sunshine continues and the amount of stored electricity when the sign on the previous day is lit is 4 kWh. Due to the lighting at night, the amount of power stored in the morning of the day drops to 3 kWh. Here, if the lighting time is 8:00, the power consumption amount is 15 hours × 200 W = 3 kWh by 23:00, and the discharge lower limit can be reached.

Although there is an error in actuality, there is a possibility that the lower limit of discharge is not reached just at the lighting off time. However, the backup power source 6 is used after the lower limit of discharge is reached early, and in the next morning when the lower limit of discharge is not reached. Suppose that the discharge is continued.

¡The second method is to respond by setting consecutive daytime charging prohibition days. Since the amount of electric power stored by 1 kWh per night decreases, the lower limit of discharge can be reached by providing a daytime charge prohibition day for a maximum of 5 consecutive days. If necessary, the charging function may be turned on, for example, on the scheduled date for reaching the lower discharge limit, so that the lower discharge limit can be reached in the vicinity of the turn-off time.

③ The third method is to support a device that is not always in operation and operates with stored power. For example, a watering system is provided together and used for cleaning the solar cell device 1. As a result, the discharge lower limit can be reached while cleaning the solar cell device 1. Furthermore, when there is a grid-connected solar cell device in the vicinity, not only cleaning but also daytime watering may be performed in order to lower the temperature of the solar cell module during power generation.

The fourth method is to use the illumination sign 4 as a combined type of LED and fluorescent tube. By using a fluorescent tube with a large discharge load as the illumination for signage during capacity learning, the power consumption is increased and the time to reach the discharge lower limit is shortened.

In the fifth method, the illumination type sign 4 is a combination of an internal illumination type and a backlight type, and the backlight LED is also turned on at the time of capacity learning, increasing the discharge load and supplying a change to the expression of the sign. Correspond.

The sixth method responds by discharging overnight during a disaster. It is usually off at regular times, but in the event of a disaster, it will be operated overnight as a landmark from the surroundings. At this time, capacity learning may also be used.

In the seventh method, the control circuit 30 senses that the remaining amount of electricity stored in the storage battery 2 has decreased, and uses the method described above to reach the lower discharge limit. Thereby, the time concerning capacity learning can be suppressed. In addition, increasing the illuminance of the LED may be used in combination to increase power consumption.

Next, it is important to take charge up to the upper limit of charge after discharging to the lower limit of discharge. In the example of the above-described embodiment, when converted from the expected power generation amount, even if there is no nighttime power consumption, a period of about 3 days is required until the charging upper limit is reached. Therefore, it is desirable to add the following method.

The first method is to charge using the backup power source 6. In this case, it is not always necessary to set the charging upper limit, and the charging amount may reach the charging upper limit by daytime charging the next day.

The second method corresponds to lowering the LED illuminance or lighting only a part of the sign. By reducing power consumption at night, the number of days required to reach the upper limit of charging will be shortened.

It should be noted that the schedule is managed according to a specific date when the sign may be turned off, for example, by managing the operation date of the capacity learning function. You may employ | adopt methods, such as implementing according to the scheduled operation day of the storage battery use apparatus installed side by side. In addition, when the amount of solar radiation and temperature fluctuations are relatively small in autumn and spring, the discharge is made to the lower limit of discharge. Alternatively, the control circuit 30 may obtain weather information data from the communication device 37 and control the discharge to the discharge lower limit on the day before it is expected that the clear sky will continue.

Next, an illuminating sign device as an example of an illuminating device according to a second embodiment of the present invention will be described with reference to FIG. FIG. 6 is a schematic configuration diagram showing the overall configuration of an illumination sign device according to the second embodiment of the present invention.

The second embodiment shown in FIG. 6 is an up front illuminated sign 4. This illuminated sign 4 is obtained by providing a bullet-type LED 41 a on the front surface of the panel 42. Since the bullet-type LED 41a travels straight, high visibility can be obtained even from a distant place. In this upfront method, the panel 42 is bordered by a bullet-type LED 41a to illuminate the sign. The illumination type sign 4 is also turned on / off and the capacity learning is performed by the control circuit 3 under the same control as in the first embodiment.

Next, an illumination sign device as an example of an illumination device according to a third embodiment of the present invention will be described with reference to FIG. FIG. 7 is a schematic configuration diagram showing the overall configuration of an illumination sign device according to a third embodiment of the present invention.

The third embodiment shown in FIG. 7 is a backlight type illuminated sign 4. The illumination type sign 4 is provided with a bullet-type LED 41a on the wall surface side so that the wall surface or the like is illuminated with the bullet-type LED 41a. In this backlight method, the sign is raised by reflecting the bullet-type LED 41a on a wall plate or the like and illuminating the edge of the panel 42. The illumination sign 4 is also turned on / off and capacity learning by the control circuit 3 under the same control as in the first embodiment.

Next, an illuminating sign device as an example of an illuminating device according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 8: is a schematic block diagram which shows the whole structure of the illumination type signature apparatus concerning 4th Embodiment of this invention.

A fourth embodiment shown in FIG. 8 is an illumination sign 4 having an internal illumination method and a backlight method. This illumination type sign 4 is provided with a V-cut LED 41 inside and a bullet-type LED 41a on the wall surface side. The illumination type sign 4 switches between the internal illumination type and the backlight type as necessary. Further, when discharging to the lower limit of discharge, the LED 41 and the LED 41a are used to emit light to shorten the discharge time.

Next, an illumination sign device as an example of an illumination device according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 9: is a block diagram which shows the structure of the illumination type sign apparatus as an example of the illuminating device concerning the 5th Embodiment of this invention.

The fifth embodiment is configured such that electric power is supplied from the storage battery 2 to another discharge load 50 different from the illumination unit 40 via the switch circuit 35. As the discharge load 50, the watering system described above or the like is used. Using this discharge load 50, the time to reach the discharge lower limit can be shortened.

Next, an illuminating sign device as an example of an illuminating device according to a sixth embodiment of the present invention will be described with reference to FIG. FIG. 10: is a block diagram which shows the structure of the illumination type sign apparatus as an example of the illuminating device concerning 6th Embodiment of this invention.

In the sixth embodiment, the storage battery 2 includes two

storage battery units

20a and 20b. These

storage battery units

20 a and 20 b are connected to the charge / discharge circuit 30 via the selector 21. And it has the structure which eliminated the backup power supply 6 of the power supply system by providing the two

storage battery parts

20a and 20b. Electric power is supplied from either one of the storage battery units 20a (or 20b) to the illumination unit 40 via the charge / discharge circuit 31, and the generated power of the solar cell device 1 is supplied from the charge / discharge circuit 31 to be charged. At this time, the other storage battery unit is configured to be usable as a backup power source.

These

storage battery units

20a and 20b are, for example, a lithium ion battery or a nickel hydride battery having a capacity of 4.5 kWh, and are configured to stop discharging when the remaining amount of storage becomes 1/3.

When one of the storage battery units 20a (or 20b) is discharged to the discharge lower limit by the capacity learning function, the power stored in the other storage battery unit is used when a power source is necessary. And after making it discharge to a discharge minimum, as mentioned above, capacity learning is performed by charging a storage battery part to a charge upper limit.

After this capacity learning is completed, the storage battery unit that has not been used for capacity learning and has been used for conventional backup is switched to be used for power supplied to the lighting unit 40. As described above, the storage battery unit can be prevented from being deteriorated by using the storage battery unit alternately with the capacity learning as a boundary.

Also, when the storage battery unit used for power supply stops discharging due to an error in the remaining amount of stored electricity, it can be switched on continuously without switching off the sign by switching to the storage battery unit for backup. In addition, even if the remaining amount of power to stop discharging is reduced to 1/3, it can be immediately switched to a backup storage battery.

Next, an illuminating sign device as an example of an illuminating device according to a seventh embodiment of the present invention will be described with reference to FIG. FIG. 11: is a schematic block diagram which shows the whole structure of the illumination type signature apparatus concerning 4th Embodiment of this invention.

In the above-described embodiment, the solar cell device 1 is taken as an example of power generation means using renewable energy. On the other hand, 7th Embodiment uses the solar cell apparatus 1 and the wind power generator 1a together as an apparatus which generate | occur | produces with renewable energy. Thus, the electric power generated using the solar cell device 1 and the wind power generator 1a is charged in the storage battery device 2. It is also possible to construct a system using the advantages of both the solar cell device 1 and the wind power generator 1a. The illumination sign 4 is also turned on / off and capacity learning by the control circuit 3 under the same control as described above. Further, depending on the installation location or the like, it is possible to provide only the wind power generator 1a without including the solar battery device 1.

Next, a street lamp as an example of a lighting apparatus according to the eighth embodiment of the present invention will be described with reference to FIG. FIG. 12: is a typical perspective view which shows the street lamp as an example of the illuminating device concerning 8th Embodiment of this invention. In the eighth embodiment, the present invention is applied to a street lamp 40a having an LED inside instead of the illumination sign 4. This street light is not turned on with time, but on / off is controlled by the output of the sunshine sensor. Other configurations are the same as those of the above-described embodiments. And in the support body 5, the storage battery 2 charged with the electric power generated with the solar cell apparatus 1 and the control apparatus 3 are arrange | positioned.

The control device 3 controls the charging of the power generated by the solar cell device 1 to the storage battery 2 and the discharge from the storage battery 2. The street light 40a is supplied with power from the storage battery 2 and is lit. In this embodiment, the control device 3 controls the storage battery 2 to stop discharging in a state where predetermined power is left. And it has the same discharge, charge control, and capacity learning function as the above-described embodiments.

Furthermore, it is desirable to have the following configuration for the purpose of reducing dependency on backup power supply throughout the year. For example, the power consumption is changed according to the remaining amount of power storage.

¡Control to reduce the illuminance or the number of lights when the remaining power is low. Further, in the case of a corporate sign or the like, the visibility can be maintained only by the outline portion, so that the lighting of only the frame portion may be controlled.

In case of rain, the appeal effect of the sign is reduced, so use a rain sensor to change the power consumption according to the weather. For this reason, control is performed so that the power consumption is reduced at least when the lighting time zone is rainy.

In addition, when the lighting time zone is rainy, there is a high possibility that the power generation amount on the current day or the next day is small, and in this case, it is more effective.

サイン Reduce sign illuminance when using backup power. In addition to reducing power consumption from depleted energy, the use of backup power can be checked at a glance, reducing the burden on the administrator.

The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims for patent.

DESCRIPTION OF SYMBOLS 1 Solar cell 2 Storage battery 3 Control apparatus 4 Illuminated sign 6 Backup power supply 30 Control circuit 31 Charging / discharging circuit 32 DC / DC converter 33 Measurement circuit 34 Memory 35 Switch circuit 36 Sensor part 37 Communication apparatus 38 Input apparatus 40 Illumination part 41 LED

Claims

A generator with renewable energy,
A storage battery that is charged with electric power from the power generation device;
An illuminator that emits light from the power supplied from the storage battery;
A control unit for controlling charging and discharging of the storage battery,
The control unit is configured to stop discharge in a state in which at least a part of the storage amount of the storage battery remains during normal operation, and a discharge lower limit of the storage battery when learning the storage capacity of the storage battery. A lighting device that performs second discharge control for discharging to a maximum.
The lighting device according to claim 1, wherein the power generation device is a solar cell device capable of obtaining a power generation amount more than twice the power consumption amount of the illumination unit.
The lighting device according to claim 1, wherein the controller learns the storage capacity by discharging the storage battery to a discharge lower limit and then charging the battery to a charge upper limit.
The lighting device according to claim 1, wherein the control unit performs second discharge control of the storage battery by causing the lighting unit to emit light in the daytime.
The illumination device according to claim 1, wherein the illumination unit includes a plurality of light sources, and the control unit performs second discharge control by supplying power to at least some of the plurality of light sources.
The lighting device according to claim 5, wherein the control unit performs second discharge control by supplying power to a light source with high power consumption among the plurality of light sources.
In addition to the illumination unit, the apparatus further includes an annexed device operated by the storage battery,
The lighting device according to claim 1, wherein the control unit performs second discharge control by operating at least one of the lighting unit and the side device.