KR20210059944A - Power saving control device for devices using solar electricity - Google Patents

Abstract

The present invention relates to a power-saving control device for efficiently using limited energy produced from eco-friendly energy resources such as photovoltaic power generation. The power saving control device for receiving DC power from an external power device such as a photovoltaic module or an energy storage device connected thereto, and supplying the DC power to multiple connected peripherals according to the present invention includes: an external power input unit for receiving DC power from an external power source; a DC power conversion unit for converting DC power received by the external power input unit into DC power having a plurality of different output powers; a first power output unit including one or more power terminals to output a plurality of DC power converted from the DC power conversion unit; an event detection unit for detecting a specific event; a second power output unit including one or more power terminals to output a plurality of DC power converted from the DC power conversion unit; a driving relay unit provided between the DC power conversion unit and the second power output unit; and a program memory storing a control program for controlling the operation of the power saving device, wherein the driving relay unit is configured to turn on or off power supply to one or more power terminals of the second power output unit under the control of the control program.

Description

Power saving control device for devices using solar electricity

The present invention relates to a power saving control device, and more specifically, to a power saving control device for a device using solar electricity for efficiently using limited energy produced from environmentally friendly energy resources such as solar power generation. will be.

Due to the recent acceleration of global warming and environmental pollution caused by excessive use of fuel, interest in new and renewable energy such as the development of energy sources using nature-friendly energy sources such as solar, wind, tidal power, etc. is growing. Throughout the years, many studies and applications are being made as alternative energy sources. In particular, solar light forms the source of natural energy and can be said to be an infinite resource without the risk of depletion. Solar power generation devices that generate electricity using sunlight are installed in many places in large or small scales. In addition, while being recommended nationally, it is widely spreading, such as being installed in general houses and apartments as well as office buildings and factories.

On the other hand, in areas where it is difficult to supply power at all times, such as in mountainous areas, valleys, water accident areas, or isolated areas where human access is difficult, there are many cases of supplying power necessary for devices using electric energy using sunlight. The region is expanding further. However, although solar energy is a nature-friendly energy source without environmental pollution problems, energy produced by sunlight is very limited, so when the number of devices connected to the solar power source increases or when devices are used continuously, energy storage devices The electric energy stored in the back is depleted and a problem occurs in that the device cannot be operated.

Regarding power saving devices applied to various devices (devices), Patent Registration No. 692557 "Energy saving type switching power supply device and its energy saving method", Patent Registration No. 378107 "Standby power saving circuit of switching power supply device", Although many technologies such as Patent Publication No. 2010-68759 "Power supply device for power saving using a latch circuit" appeared, there was no case applied to solar power generation. The emergence of power saving devices that can be applied to photovoltaic power generation is urgent.

The present invention is an invention conceived based on the above-described problem, and an object of the present invention is to use solar electricity to enable energy-efficient operation of devices (devices) connected to a limited power source such as solar power generation energy. It is to provide a device power saving control device.

In order to achieve the above-described problem, according to an aspect of the present invention, a power saving control device for receiving DC power from an external power supply device and supplying DC power to a plurality of connected peripheral devices is provided. The control device includes an external power input unit for receiving DC power from an external power source; A DC power conversion unit for converting DC power received through the external power input unit into DC power having a plurality of different output powers; A first power output unit including at least one power terminal to output a plurality of DC power converted from the DC power conversion unit; An event detector for detecting a specific event; A second power output unit including at least one power terminal to output a plurality of DC power converted from the DC power conversion unit; And a driving relay unit provided between the DC power conversion unit and the second power output unit. And a program memory storing a control program for controlling the operation of the power saving device, wherein the driving relay unit is configured to turn on or off power supply to one or more power terminals of the second power output unit under the control of the control program.

In the above-described aspect, the driving relay unit includes at least one power supply switch each connected to at least one power terminal of the second power output unit, and the control program turns on at least one power supply switch only when an event is detected from the event detection unit. It is configured to be turned off.

Also in the above-described aspect, the event detection unit includes a plurality of different types of sensors, and the control program is configured to turn on or off one or more power supply switches according to a result detected from the plurality of different types of sensors.

In addition, in the above-described aspect, the power saving control device includes a dip switch for adjusting a time of power supplied to the second power output unit when an event is detected, and the control program includes at least one power supply switch when an event is detected. It is configured to turn on the power supply switch for a period of time specified by, and is configured to constantly supply power to a plurality of power terminals of the first power output unit regardless of event detection.

In the case of devices that require constant operation, the power saving control device according to the present invention is connected to the constant power output of the power saving control device, whereas in some devices, event power supplies power only when a specific event occurs. By connecting to the output, the power can be operated more efficiently.

In addition, according to the present invention, it is possible to provide a power saving control device capable of reducing the current consumed by the inverter without requiring an inverter that converts AC into DC by using only DC power without using AC power. There will be.

1 is a view showing an example of a power saving system using the power saving control device according to the present invention.
2 is a functional block diagram schematically showing the internal configuration of the power saving control apparatus according to the present invention.

1 is a block diagram showing an example of a power saving system including a power saving control device 10 according to the present invention. As shown in FIG. 1, the power saving control device 10 according to the present invention includes a photoelectric conversion device 20 that receives sunlight and converts it into electrical energy, and the electric energy generated from the photoelectric conversion device 20. Consisting of an energy storage device 30 for storage and a power saving control device 10 for receiving power from the energy storage device 30 and efficiently supplying power to the peripheral devices 40a to 40b connected thereto. do.

A photoelectric conversion device refers to a device that converts light from the sun into electrical energy using a photovoltaic effect. The photoelectric effect is almost the same as the photoelectric effect, but there are differences. While the photoelectric effect generally refers to the effect of emitting electrons by receiving light, the photoelectric effect refers to the electrons and holes resulting from the photoelectric effect moving inside the material to create a potential difference. That is, the photovoltaic effect can be said to be a side effect that can be considered as a result of the photoelectric effect.

A device that converts light energy into electrical energy using the photovoltaic effect is a photoelectric conversion device called a solar cell, a solar module, or a solar array. For example, a solar cell is largely composed of an n-type semiconductor and a p-type semiconductor, and an antireflection plate and an electrode that help absorb light. The n-type semiconductor plays the main role of transferring electrons and the p-type semiconductor transfers charges. When these two semiconductors are attached together, electrons are diffused from the n-type semiconductor with relatively many electrons to the p-type semiconductor. Both holes spread out to the n-type semiconductor.

Accordingly, positive holes with positive charges are concentrated in the n-type semiconductor side, and electrons with negative charges are concentrated in the p-type semiconductor side. Accordingly, a built-in field is generated in the junction from the n-type semiconductor to the p-type semiconductor. When the electric charge is sufficiently diffused, the strength of the electric field is also strong, and at some point, the force to diffuse in one direction and the force to move in the opposite direction by the electric field become the same, leading to a state in which electrons or holes no longer move. Therefore, the region in which the electric field is generated is called a depletion region (space charge region).

When light with energy greater than the band gap of the semiconductor enters the solar cell, electrons present in the solar cell are excited to a state of higher energy, and holes are created in the place where the electrons existed. hole pair) is created. At this time, under the influence of the internal electric field generated by the junction of the n-type semiconductor and the p-type semiconductor, the excited electrons move toward the n-type semiconductor, and the positive holes move toward the p-type semiconductor. Since electrons and positive holes, each with negative and positive charges, move in opposite directions, current flows in the solar cell along the moving direction of the positive holes.

Unless otherwise specified in the present invention, the photoelectric conversion device is any one of a solar cell, a solar module, or a solar array.

An energy storage system (ESS) 30 is coupled to the rear end of the photoelectric conversion device 20. The energy storage device is connected to the rear end of the photoelectric conversion device to compensate for the irregular and unstable electrical output of electrical energy generated through sunlight. The energy storage device is configured to accumulate electricity produced from the photoelectric conversion device and supply stable DC power to the power saving control device 10 connected to the rear end of the accumulated electricity.

The energy storage device 30 typically stores a battery for storing electrical energy supplied from the photoelectric conversion device 20 as DC, and stores real-time data such as current, voltage, and temperature of the battery, and calculates the storage capacity to obtain a battery. It includes a BMS (Battery Management System) that monitors battery status and operation, such as predicting the capacity and life of the battery, and further includes a PMS (Power Management System) that monitors energy consumption in the energy storage device if necessary. May be.

As shown in FIG. 1, the power saving control device 10 is configured to control power supply to a plurality of peripheral devices by connecting a plurality of peripheral devices 40a to 40b. Let's be more specific.

2 is a block diagram schematically showing the internal configuration of the power saving control device 10 according to the present invention. As shown in FIG. 2, the power saving control device 10 according to the present invention outputs a plurality of DC power received by the external power input unit 110 and the external power input unit 110 for receiving DC from an external power source. A DC power conversion unit 120 for converting into DC power having power, a constant power output unit 130 for always outputting the converted DC power, and an event power output unit 150 for outputting power to the outside when a specific event occurs. , And a detection unit 160 for detecting an event.

The external power input unit 110 receives DC power from an external power supply device, for example, an energy storage device 30. The supplied DC power is input to the DC power converter 120 connected to the rear end.

The DC power conversion unit 120 is formed as a DC-DC converter for converting DC power supplied from the external power input unit 110 into DC power having a plurality of outputs (eg, 5V, 9V, 12V, 24V). do. In order to provide DC power having a plurality of outputs, the DC power conversion unit may include a plurality of DC-DC converter circuits, and the converted DC output may vary according to the power saving control device 10.

The DC power converted by the DC power conversion unit 120 is connected to the power supply of the constant power output unit 130, the event power output unit 150, and the sensing unit 160 to reduce the power supply 10 and external peripheral devices. It is configured to supply the necessary power to 40 (Always Peripheral Devices and Event Peripherals).

Peripheral devices connected to the power saving control device 10 can be classified into a permanent peripheral device 40a that requires constant power supply and an event peripheral device 40b that requires power only when an event occurs. The device 40a is connected through the constant power output unit 130, and the event peripheral device 40b is connected through the event power output unit 150.

The constant peripheral device 40a may be a device that requires constant power supply, for example, a surveillance camera device for the purpose of constantly monitoring the surroundings, and the event peripheral device 40b is configured to be driven when a specific event occurs. It may be a lighting device, an alarm device, or a broadcasting device.

In the present invention, peripheral devices are separately described for convenience of description, but the above-described devices correspond to examples to aid understanding of the present invention. It will be apparent to those skilled in the art that the event peripherals are interchangeable or changeable.

In order to detect an event, the power saving control device 10 according to the present invention further includes a detection unit 160. The sensing unit 160 may use various sensors such as a voice sensor, a motion sensor, a climate sensor, a temperature sensor, and a photosensitive sensor, depending on the purpose of which the power saving control device 10 is used.

When a motion detection sensor is used as the sensing unit 160 as an example, a monitoring camera is connected to the always power output unit 130 as the always peripheral device 40a, and the lighting device is an event power output unit 150 ) Can be connected. In this case, the power-saving control device 10 constantly supplies power to the monitoring camera to perform a monitoring task for a corresponding area, and when movement or movement of an object is detected by a motion detection sensor, it supplies power to the event peripheral devices. By turning on the lighting device, unnecessary power can be prevented from being wasted. Accordingly, since the sensing unit 160 needs to operate constantly, power must be supplied to the power supply of the sensing unit 160 at all times.

In the above-described embodiment, the sensing unit 160 is shown to be one sensor, but the sensing unit 160 may further include one or more different types of sensors. For example, in the above-described example, the lighting device is configured to be turned on only when movement or movement of an object is detected, but the sensing unit 160 is an illuminance sensor so that the lighting device is turned on under a specific illuminance condition. Alternatively, it may further include a climate sensor.

In addition, in the above-described embodiment, for convenience of explanation, one event peripheral device is described to be turned on according to the detection result of the detection unit 160, but one or more event peripheral devices are described according to the detection result of the detection unit 160. It may be configured to be turned on.

As shown in FIG. 2, the event power output unit 150 is connected to the DC power conversion unit 120 through the driving relay unit 140. The driving relay unit 140 is configured to receive an event signal from the sensing unit 160 and to turn on power output to one or more event power output units when the event signal is received. To this end, the driving relay unit 140 provides a plurality of switching means connected to each event power terminal to supply and cut off power to each event power terminal (5v, 9v, 12v, 24v) constituting the event power output unit. It can be configured to include.

In addition, the power saving control apparatus 10 according to the present invention includes a program memory 180 in which a program for controlling the operation of the driving relay unit 140 as described above is embedded. In the program memory 180, a switch on/off control program of the driving relay unit 140 corresponding to the detection result of the detection unit 160 is stored, and the control program is a driving relay unit according to the stored program. The on-off of the switch of 140 is controlled.

In addition, the power saving control device 10 according to the present invention includes a dip switch 170 for adjusting the power supply time output to the event power output unit, and an event is detected from detection through the adjustment of the dip switch 17. After that, it is configured to determine whether to continuously supply power to the event power output for a few minutes (eg, 3 minutes, 10 minutes, 30 minutes, 1 hour, etc.).

The control program stored in the program memory 180 turns on the switch of the driving relay unit 140 when an event is detected to supply power to the power terminal of the corresponding event power output unit 150, and then by a dip switch. When the specified time elapses, the switch of the driving relay unit 140 is turned off to cut off power to the power terminal of the corresponding event power output unit 150.

The power saving control device 10 according to the present invention further includes a status display unit 170 for notifying the status to the outside. The status display unit 170 includes a plurality of LEDs, one of which may be an LED indicating the operation state of the power saving control device, and the other LED is the event power of the power saving control device 10 An LED indicating the operation state of the output unit 150 is adopted, and it is configured to easily check whether the power saving control device 10 operates normally when an event occurs.

As described above, the power saving control apparatus according to the present invention receives a DC input from an external power supply and converts the received DC power to a plurality of DC power sources having different outputs through a DC-DC converter, thereby converting DC to There is no power loss in the process of using an inverter that converts to AC and uses DC again, and various peripheral devices are used, but some peripheral devices are configured to operate only when an event occurs, preventing unnecessary power wasted. have.

The above description is for illustrative purposes of the present invention, and the embodiments published in the specification are not intended to limit the technical idea of the present invention, but to explain the present invention. Various modifications and variations will be possible without departing from the technical idea of Therefore, the scope of protection of the present invention is interpreted by the matters described in the claims, and technical matters within the scope equivalent thereto are to be construed as being included in the scope of the present invention.

10: power saving control device 20: photoelectric conversion device
30: energy storage device 40a: constant power peripheral device
40b: event power peripheral 110: external DC power input
120: DC power conversion unit 130: constant power output unit
140: drive relay unit 150: event power output unit
160: sensing unit 170: status display unit
180: program memory

Claims (4)

In the power saving control device for receiving DC power from an external power supply and supplying DC power to a plurality of connected peripheral devices,
The control device,
An external power input unit for receiving DC power from an external power source;
A DC power conversion unit for converting DC power received through the external power input unit into DC power having a plurality of different output powers;
A first power output unit including one or more power terminals to output a plurality of DC power converted from the DC power conversion unit;
An event detector for detecting a specific event;
A second power output unit including one or more power terminals to output a plurality of DC power converted from the DC power conversion unit;
A driving relay unit provided between the DC power conversion unit and the second power output unit;
A program memory storing a control program for controlling the operation of the power saving device;
And the driving relay unit is configured to turn on or off power supply to one or more power terminals of the second power output unit under the control of a control program. Device power saving control device.
The method of claim 1,
The driving relay unit includes at least one power supply switch each connected to at least one power terminal of the second power output unit,
The control program is configured to turn on or off one or more power supply switches only when an event is detected by the event detection unit.
The method of claim 2,
The event detection unit includes a plurality of different types of sensors,
The control program is configured to turn on or off one or more power supply switches according to a result detected from a plurality of different types of sensors.
The method of claim 2,
The power saving control device includes a dip switch for adjusting a time of power supplied to the second power output unit when an event is detected,
The control program is configured to turn on at least one power supply switch for a time specified by the dip switch when an event is detected,
Power saving control apparatus for a device using solar electricity, characterized in that the power is continuously supplied to the plurality of power terminals of the first power output unit regardless of event detection.

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