KR20130080633A - Apparatus, lighting system and method for controlling charging-discharging of impedance matching type solar - Google Patents

Abstract

PURPOSE: An impedance matching type sunlight charging/discharging control device, a lighting lamp system thereof, and a control method thereof are provided to perform precise control by determining daytime and nighttime with current time and an output voltage of a solar cell module. CONSTITUTION: A main control unit (210) determines daytime and nighttime with current time and an output voltage of a solar cell module (110). The main control unit generates a first pulse width modulation signal during the determination of daytime. The main control unit generates a second pulse width modulation signal during the determination of nighttime. A first DC-DC converter (220) boosts power outputted from the solar cell module by using the first pulse width modulation signal in order to charge a battery with the power. A second DC-DC converter (230) boosts the charged power of the battery by the second pulse width modulation signal in order to supply the power to a light lamp load (130). [Reference numerals] (110) Solar cell module; (120) Batter; (130) Light lamp load; (140) External computer; (210) Main control unit; (220) First DC-DC converter; (230) Second DC-DC converter; (240) Over charging/over discharging sensing unit; (250) RTC control unit; (260) Communication unit; (270) Battery sensing unit; (280) Battery kind sensing unit

Description

Impedance Matching Solar Charge Discharge Controller, Lighting System and Control Method {Apparatus, Lighting System and Method for Controlling Charging-Discharging of Impedance Matching Type Solar}

Embodiment of the present invention relates to an impedance matching solar charging and discharging control device, a lighting system and a control method thereof. More specifically, the impedance matching type solar charging and discharging control device and the lamp, which supplies a constant voltage to the battery regardless of the output voltage of the solar cell module and supplies the output voltage of the battery according to the voltage of the lamp light. And a control method thereof.

The contents described in this section merely provide background information on the embodiment of the present invention and do not constitute the prior art.

Photovoltaic power generation is a technology that allows you to convert sunlight into electricity directly without limit, and you can get electricity wherever sunlight shines. Unlike other methods, there is no pollution such as air pollution, noise, heat generation, vibration, etc. It is a clean energy source. In addition, there is almost no need for transportation of fuel and maintenance of power generation equipment, and has a long service life and easy selection and installation of equipment. However, due to the low density of solar energy and low energy conversion efficiency, a large installation area is required and the cost of generating power is relatively high. Therefore, a high efficiency solar cell needs to be developed.

If you look at the solar street lamp among the apparatus using the photovoltaic power generation, the existing solar street lamp has a small amount of electricity produced by the solar cell module to charge the battery when the sunlight conditions are not good, such as rain or continuous cloudy days. There is a problem that the street light does not turn on. In other words, this is because it is temporarily charged only when the output voltage of the solar cell module is higher than the output voltage of the battery.

In addition, if the output voltage detection method of the solar cell module is used for the day / night judgment for charging / discharging, when the variation rate of the output voltage of the solar cell module becomes severe, the control device cannot make precise day / night judgment. There is a problem that the efficiency of discharge is inferior.

According to the embodiment of the present invention, the amount of electricity produced by the solar cell module is low, so that the battery can be charged even if the output voltage of the solar cell module is lower than the output voltage of the battery, and the output voltage and the day / night determination of the solar cell module Precise control is possible by judging using the current time, and the main purpose is to increase the charging / discharging efficiency by changing the charging / discharging condition flexibly.

According to an aspect of the embodiment of the present invention to achieve the above object, it determines the day / night by using the output voltage and the current time of the solar cell module, when the day is determined to generate a first pulse width modulation (PWM) signal A main control unit for generating a second pulse width modulation (PWM) signal when determined at night; A first DC-DC converter configured to charge or depressurize power output from the solar cell module by a first pulse width modulation (PWM) signal generated by the main controller; And a second DC-DC converter for boosting or stepping down the charged power of the battery according to the second pulse width modulation (PWM) signal generated by the main controller to supply the lamp load. Provides a solar charge and discharge control device.

Here, the main controller may be determined to be nighttime when the output voltage of the solar cell module lasts a predetermined voltage or less for a predetermined time and the current time passes a predetermined time.

Here, the main controller may be determined as a week when the output voltage of the solar cell module lasts a predetermined time or more and a current time passes a predetermined time.

Here, the output voltage of the battery may be compared with a predetermined voltage to detect whether it is overcharged or overdischarged, and if so, the overcharged or overdischarged detector may further include the overcharged information or the overdischarged information to the main controller.

The main control unit may block the first pulse width modulation (PWM) signal when receiving the overcharge information from the overcharge / overdischarge detection unit, and receives the overdischarge information from the overcharge / overdischarge detection unit. The second pulse width modulation (PWM) signal may be blocked.

The real time clock (RTC) may further include a real time clock (RTC) controller for generating the current time using the RTC reference time and transmitting the current time to the main controller.

The RTC may further include a communication unit configured to change the RTC reference time by an external computer connected to a communication port and transmit the RTC reference time to the main control unit, wherein the main control unit transmits the received RTC reference time to the RTC. (Real Time Clock) Can be sent to the controller.

The impedance matching solar charge / discharge control apparatus may further include a temperature sensor configured to detect a temperature change of the battery and transmit temperature information to the main controller.

Here, when the temperature of the temperature information exceeds a predetermined temperature, the main control unit blocks the first pulse width modulation (PWM) signal, and after the first pulse width modulation (PWM) signal is blocked, the temperature information. When the temperature of is equal to or less than another predetermined temperature, the first pulse width modulation (PWM) signal may be transmitted.

The method may further include a battery type detector configured to detect the type of the battery by comparing whether the output voltage of the battery is within a predetermined voltage range.

In addition, according to another aspect of the present invention, a solar cell module for converting sunlight into electrical energy; Judging day / night by using the output voltage and the current time of the solar cell module, the first pulse width modulation (PWM) signal is generated when judging by day, the second pulse width modulation (PWM) signal when judged by night A main control unit for generating a; A first DC-DC converter configured to charge or depress electric energy converted from the solar cell module by a first pulse width modulation (PWM) signal generated by the main controller to charge a battery; And a second DC-DC converter for boosting or stepping down the electric energy charged by the battery according to the second pulse width modulation (PWM) signal generated by the main controller to supply the lamp load. It provides a type solar charging and discharging lamp system.

Here, the battery may further include a battery for discharging the electrical energy converted from the solar cell module to supply the electrical energy to the lamp load.

Here, the lamp may further include a lamp load that is turned on by using the electric energy supplied by the battery.

In addition, according to another aspect of the embodiment of the present invention, in a method of controlling the charge and discharge of the battery by the impedance-matching solar charging and discharging control device, when the predetermined information is input from the external computer using the communication port, the input information is inputted. An input step of using; Day / night determination step of determining the day / night using the output voltage and the current time of the solar cell module; If it is determined as the day, the charging step of charging the battery by boosting or stepping down the power output from the solar cell module by a first DC-DC converter receiving a first pulse width modulation (PWM) signal; And a step of discharging the power charged to the battery by a second DC-DC converter receiving a second pulse width modulation (PWM) signal to supply the lamp load by irrespective of the order. It provides an impedance-matching solar charging and discharging control method, characterized in that.

Here, the input step, may input any one or more of the predetermined information day / night set time, day / night set voltage, overcharge / over discharge set voltage and charge / discharge recovery set voltage.

Here, in the input step, information not input among the predetermined information may use previously stored information.

The day / night determination step may include determining whether an output voltage of the solar cell module is equal to or less than a night setting voltage; Determining whether the output voltage of the solar cell module is lower than the night setting voltage for a predetermined time; Determining whether the current time passes the night setting time when the output voltage of the solar cell module is equal to or less than the night setting voltage and continues for a predetermined time in the state; Determining whether the current time is night, when the current time passes the night setting time; Determining whether the output voltage of the solar cell module is greater than or equal to the weekly set voltage after the night time is determined; If the output voltage of the solar cell module is equal to or greater than the weekly set voltage, determining whether the state lasts for a predetermined time; Determining whether the current time passes the weekly setting time when the output voltage of the solar cell module is greater than the weekly setting voltage and continues for a predetermined time; And if the current time passes the weekly set time, it may include the step of judging.

Herein, the charging step may include determining whether the output voltage of the solar cell module exceeds the output voltage of the battery when it is determined as daytime in the day / night determination step; When the output voltage of the solar cell module exceeds the output voltage of the battery, the first DC-DC converter receives a first pulse width modulation (PWM) signal to step down the power output from the solar cell module to charge the battery, If the output voltage of the solar cell module does not exceed the voltage of the battery step of boosting the power output from the solar cell module by the first DC-DC converter receiving a first pulse width modulation (PWM) signal to charge the battery ; And determining overcharge in the charging of the battery.

The determining of the overcharge may include determining whether the output voltage of the battery is greater than the overcharge set voltage in the charging of the battery; Blocking the first pulse width modulation (PWM) signal transmitted to the first DC-DC converter when the output voltage of the battery is greater than or equal to the overcharge set voltage; Determining whether the output voltage of the battery is less than or equal to a charge recovery set voltage in the overcharge state; And when the output voltage of the battery is less than or equal to the charge recovery set voltage, determining that the battery is returned to the charging step, and transmitting a first pulse width modulation (PWM) signal to the first DC-DC converter.

Herein, the discharging step may include determining whether the output voltage of the battery exceeds the voltage of the lamp light load when the night / night determination step determines the night time; When the output voltage of the battery exceeds the voltage of the lamp load, the power output from the battery is stepped down by the second DC-DC converter receiving the second pulse width modulation (PWM) signal and supplied to the lamp load, and the output of the battery is output. Discharging the battery to boost the power output from the battery by the second DC-DC converter receiving the second pulse width modulation (PWM) signal to supply the lamp load if the voltage does not exceed the voltage of the lamp load; And determining over-discharge at the step of discharging the battery.

The determining of the over discharge may include determining whether an output voltage of the battery is less than or equal to an over discharge set voltage in the step of discharging the battery; Blocking the second pulse width modulation (PWM) signal that is determined to be over-discharged and transmitted to the second DC-DC converter when the output voltage of the battery is less than or equal to the over-discharge set voltage; Determining whether an output voltage of the battery is equal to or greater than a discharge return setting voltage in the over discharge state; And when the output voltage of the battery is equal to or greater than the discharge return setting voltage, determining that the battery returns to the discharge step and transmitting a second pulse width modulation (PWM) signal to the second DC-DC converter.

As described above, according to the embodiment of the present invention, the amount of electricity produced by the solar cell module is low, so that the battery can be charged even if the output voltage of the solar cell module is lower than the output voltage of the battery, Precise control is possible by judging using the output voltage and current time of the battery module, and it is possible to change the charging / discharging conditions flexibly, thereby increasing the charging / discharging efficiency.

1 is a view schematically showing an impedance matching solar charging / discharging lamp system according to an embodiment of the present invention.
2 is a block diagram illustrating a configuration of an impedance matching solar charge / discharge control device 100 according to an embodiment of the present invention.
Figure 3 is a flow chart illustrating the overall flow of the impedance matching solar charging and discharging control method according to an embodiment of the present invention.
4 is a flowchart illustrating the day / night determination step of FIG. 3 in detail.
FIG. 5 is a flowchart illustrating the charging step of FIG. 3 in detail.
FIG. 6 is a flowchart illustrating the discharge step of FIG. 3 in detail.
7 is a view illustrating an impedance matching solar charging and discharging control device according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a view schematically showing an impedance matching solar charging / discharging lamp system according to an embodiment of the present invention.

Referring to FIG. 1, the impedance matching solar charging / discharging lighting system includes an impedance matching solar charging / discharging control device 100, a solar cell module 110, a battery 120, a lighting load 130, and an external computer ( 140). Hereinafter, the impedance matching type charge / discharge control device 100 will be briefly described as a control device 100 unless otherwise specified.

The solar cell module 110 is a device that converts sunlight into electrical energy. In other words, using a P-type semiconductor and an N-type semiconductor, when light is emitted, charges move inside, and a potential difference is generated between P and N poles. At this time, a current is applied when a load is connected.

The battery 120 is a device that charges the electric energy converted by the solar cell module 110 and discharges it to supply electric energy to the lamp load 130. The type of the battery 120 uses 12V and 24V for sealed lead-acid batteries, but is not limited thereto. The battery 120 may be discharged to charge electric energy output from the solar cell module 110 and to supply the lamp light load 130. Any capacitor would be possible.

The lamp load 130 is a device that receives the electric energy charged from the battery 120 and lights. The type of the light load 130 may have a variety of functions and forms, such as LED street lights, security lights, signage lights, road signs, garden lights, landfill lights, stop lights, pond lights, fountain lights.

External computer 140 uses RTC (Real Time Clock) reference time, day / night set time, day / night set voltage, overcharge / over discharge set voltage and charge / discharge return set voltage using communication port such as RS-485. You can enter any one or more to change existing information. In this case, the input information may be used for battery charge / discharge control of the controller 100. RTC (Real Time Clock) reference time refers to the time when the RTC is used to generate the current time, and day / night setting time means the time that is used as a reference for judging day / night. The night set voltage means a voltage that is used as a reference for judging day / night, and the overcharge / over discharge set voltage means a voltage that is used as a reference for judging overcharge / over discharge, and a charge / discharge return set voltage. , Refers to a voltage that is a reference for returning from the overcharge / over discharge state to the charge / discharge state. In particular, it is possible to change the RTC reference time to solve the international parallax problem when used abroad can reduce the error in the control device 100 to determine day / night.

The impedance matching type charge / discharge control device 100 charges the battery 120 with the power output from the solar cell module 110, and supplies the charged power of the battery 120 to the lamp load 130 in series. Through the control process of the detailed description will be described with reference to FIG.

2 is a block diagram illustrating a configuration of an impedance matching solar charge / discharge control device 100 according to an embodiment of the present invention.

Referring to FIG. 2, the impedance matching type solar charge / discharge control apparatus 100 includes a main controller 210, a first DC-DC converter 220, a second DC-DC converter 230, and overcharge / over discharge detection. The controller 240 may include an RTC controller 250, a communication unit 260, a temperature detector 270, and a battery type detector 280.

The main control unit 210 may be a central portion of the control device 100 to control other components integrally. Hereinafter, the main controller 210 will describe a series of processes for controlling the charge / discharge of the battery 120 together with other components.

First, day / night may be determined using the output voltage and the current time of the solar cell module 110. That is, when the output voltage of the solar cell module 110 lasts a predetermined time or less for a predetermined time, and the current time exceeds a predetermined time, it may be determined as night. In addition, when the output voltage of the solar cell module 110 lasts a predetermined time or more, and the current time exceeds a predetermined time, it may be determined as a week. A detailed description thereof will be described with reference to FIGS. 3 to 6.

Second, when determined as a day, the first pulse width modulation (PWM) signal is transmitted only to the first DC-DC converter 220 to boost or step down the output power of the solar cell module 110 to a constant voltage battery 120 The second DC-DC converter 230, which is not charged with the second pulse width modulation (PWM) signal, blocks the discharging operation to supply the charged power of the battery 120 to the lamp load 130. Can be prevented. Therefore, it is possible to prevent unnecessary power loss by preventing the lamp from turning on during the day.

Third, when determined at night, the second pulse width modulation (PWM) signal is transmitted only to the second DC-DC converter 230 to boost or step down the power of the charged battery 120 to illuminate the load 130 to a constant voltage The first DC-DC converter 220, which is not supplied with the first pulse width modulation (PWM) signal, blocks the charging operation, thereby boosting or stepping down the output power of the solar cell module 110 to supply the battery 120. ) Can be prevented. Therefore, since there is no sunlight at night, it is impossible to charge the battery 120, thereby preventing unnecessary power loss used for the charging operation.

Fourth, when receiving the overcharge information from the overcharge / over-discharge detection unit 240, the charging operation can be stopped by blocking the first pulse width modulation (PWM) signal transmitted to the first DC-DC converter 220, When receiving all the information, the discharge operation may be stopped by blocking the second pulse width modulation (PWM) signal transmitted to the second DC-DC converter 230. Therefore, it is possible to prevent the problem of shortening the life of the battery 120 by overcharging or overdischarging and to reduce the occurrence of unexpected accidents.

Fifth, when predetermined information is received from the communication unit 260, the existing stored information may be updated and a series of processes may be controlled using the same. Here, the predetermined information means any one or more of RTC (Real Time Clock) reference time, day / night set time, day / night set voltage, overcharge / over discharge set voltage, and charge / discharge return set voltage.

Sixth, when the temperature information of the battery 120 is input from the temperature sensor 270, when the temperature of the temperature information exceeds a predetermined temperature (eg, 60 ° C.), the first DC-DC converter 220 is transmitted. The charging operation may be stopped by blocking a pulse width modulation (PWM) signal, and may be controlled to restart the charging operation when another predetermined temperature (eg, 50 ° C.) or less is detected after the charging operation is stopped. . By doing so, it is possible to protect the system such as the battery 120, the control device 100 in the event of overheating. Herein, the predetermined temperature is merely exemplified to explain the present invention, and any other suitable temperature may be changed thereto.

The first DC-DC converter 220 boosts or steps down the power output from the solar cell module 110 using the first pulse width modulation (PWM) signal transmitted from the main controller 210 to charge the battery 120. It can be charged.

The second DC-DC converter 230 may boost or step down the charged power of the battery 120 by using the second pulse width modulation (PWM) signal transmitted from the main controller 210 to supply the lamp load 130. Can be.

The overcharge / overdischarge detection unit 240 detects whether the output voltage of the battery 120 is greater than the overcharge setting voltage or less than the overdischarge setting voltage, and transmits the overcharge information or the overdischarge information to the main control unit 210. have. Here, the overcharge / overdischarge set voltage means a voltage which is a reference for determining overcharge / overdischarge. The 12V battery may have an overcharge set voltage of 14.5V, the overdischarge set voltage of 10.5V, and the 24V battery may have an overcharge set voltage of 28.5V and the overdischarge set voltage of 21.5V. However, these voltages are only examples and other voltages may be set.

The real time clock control unit 250 may generate a current time using a real time clock (RTC) reference time and transmit the current time to the main control unit. The main control unit 210 may be used to determine the day / night by comparing the received current time with the day / night setting time. However, the generation of the current time from the RTC (Real Time Clock) is merely an example for describing the present invention, and does not exclude that the current time may be generated from an external device, a control device, or the like.

The communication unit 260 may transmit the predetermined information to the main controller 210 when the external computer 140 inputs predetermined information using the communication port. Here, the predetermined information means any one or more of RTC (Real Time Clock) reference time, day / night set time, day / night set voltage, overcharge / over discharge set voltage, and charge / discharge return set voltage. When the main controller 210 receives predetermined information from the communication unit 260, the main controller 210 may update existing stored information and control a series of processes using the predetermined information. In particular, since the RTC (Real Time Clock) reference time can be changed, it is possible to correct the current time error caused by the time difference from abroad, thereby controlling the day / night judgment more precisely.

The temperature detector 270 may detect a temperature change of the battery 120 and transmit temperature information to the main controller 210. When the main controller 210 receives the temperature information of the battery 120 from the temperature sensor 270, when the temperature of the temperature information exceeds a predetermined temperature (eg, 60 ° C.), the first DC-DC converter 220 may be used. The charging operation may be stopped by blocking the first pulse width modulation (PWM) signal transmitted to the second pulse width modulation signal, and restarting the charging operation when another predetermined temperature (eg, 50 ° C.) or less is detected after the charging operation is blocked. Can be controlled. By doing so, it is possible to protect the system such as the battery 120, the control device 100 in the event of overheating. Herein, the predetermined temperature is merely exemplified to explain the present invention, and any other suitable temperature may be changed thereto.

The battery type detector 280 may detect the type of the battery 120 by comparing whether the voltage of the battery 120 is within a predetermined voltage range when there is a drive after initial driving or initializing a program of the control device 100. . That is, by implementing a system for both the 12V / 24V battery to be driven, it is determined whether the measured voltage of the battery corresponds to the 12V battery or 24V battery compared to the voltage level of the battery and accordingly the control device (120) ) Can be controlled to be driven. The voltage level of the battery means a voltage range of the battery having a different range depending on the type of battery. For example, a 12V battery has a voltage level of 10.5V to 13V, and a 24V battery has a voltage level of 21.5V to 26.5V. However, this is only an example to explain the present embodiment, and if there is more suitable for the present invention, it may be implemented by changing the voltage level of another type of battery or battery. In addition, the operation of sensing the type of battery after initial driving or initializing a program is merely an example for describing the present invention, and if necessary, the type of battery may be detected from time to time.

Figure 3 is a flow chart illustrating the overall flow of the impedance matching solar charging and discharging control method according to an embodiment of the present invention.

Referring to FIG. 3, the method of charging / discharging the battery 120 by the impedance matching solar charging / discharging control device 100 may include an input step S301, a day / night determination step S302, and a charging step S303. And the overall flow in the order of the discharge step (S304) will be described.

The input step S301 is a step in which the control device 100 uses the inputted predetermined information when inputting predetermined information from the external computer 140 using the communication port. Here, the predetermined information means any one or more of RTC (Real Time Clock) reference time, day / night set time, day / night set voltage, overcharge / over discharge set voltage, and charge / discharge return set voltage. The information that is not input among the predetermined information can use the existing stored information to provide convenience of charge / discharge control, and to change the RTC (Real Time Clock) reference time, thereby correcting the current time error caused by time difference from abroad. Day and night judgment can be precisely controlled.

Day / night determination step (S302) is a step in which the main controller 210 determines the day / night using the output voltage and the current time of the solar cell module 110. A detailed description will be given with reference to FIG. 4.

In the charging step S303, when the main controller 210 determines to be daytime, the power output from the solar cell module 110 by the first DC-DC converter 220 receiving the first pulse width modulation (PWM) signal is determined. Step to charge or step down to charge the battery 120. A detailed description will be described with reference to FIG. 5.

In the discharging step S304, when the main controller 210 determines to be night, the power charged in the battery 120 is boosted by the second DC-DC converter 230 receiving the second pulse width modulation (PWM) signal. Or step down and supply to the lamp load 130. A detailed description will be described with reference to FIG. 6.

However, the above step may not necessarily be a time series order.

4 is a flowchart illustrating the day / night determination step of FIG. 3 in detail. For the purpose of explanation, the drawings show a 24V storage battery as a reference.

Referring to FIG. 4, it is determined whether the measured output voltage of the solar cell module 110 is equal to or less than a night set voltage (S401). The night setting voltage means a voltage that is a reference for determining a night, for example, the 12V battery may be 5V, and the 24V battery may be 10V.

If the output voltage of the solar cell module 110 is equal to or less than the night setting voltage, it is determined whether the state continues for a predetermined time (S402). The schedule time may be, for example, 5 minutes.

If the output voltage of the solar cell module 110 is equal to or lower than the night setting voltage and lasts for a predetermined time (5 minutes), it is determined whether the current time passes the night setting time (S403). The night setting time means a time used as a reference for judging night, and may be set to 19:00 as an example. However, the above time may be applied differently depending on season, place, and the like.

When the output voltage of the solar cell module 110 is equal to or less than the night setting voltage and lasts for a predetermined time (5 minutes) and the current time passes the night setting time, it is determined as night (S404).

After it is determined to be night, it is determined whether the output voltage of the solar cell module 110 is greater than the weekly set voltage (S405). The weekly setting voltage means a voltage that is a reference for determining the daytime. For example, the 12V battery may be 8V, and the 24V battery may be 16V.

If the output voltage of the solar cell module 110 is equal to or higher than the weekly set voltage, it is determined whether the state continues for a predetermined time (S406). For example, the time may be 5 minutes.

If the output voltage of the solar cell module 110 is equal to or higher than the weekly setting voltage and lasts for a predetermined time (5 minutes), it is determined whether the current time exceeds the weekly setting time (S407). The weekly setting time means a time used as a reference for judging the week, and may be set to 06 o'clock as an example. However, the above time may be applied differently depending on season, place, and the like.

If the output voltage of the solar cell module 110 is more than the weekly set voltage and lasts for a predetermined time (5 minutes) and the current time passes the weekly set time, it is determined to be daytime (S408).

FIG. 5 is a flowchart illustrating the charging step of FIG. 3 in detail. For the purpose of explanation, the drawings show a 24V storage battery as a reference.

Referring to FIG. 5, when it is determined to be daytime in the day / night determination step, it is determined whether the output voltage of the solar cell module 110 exceeds the output voltage of the battery 120 (S501).

When the output voltage of the solar cell module 110 exceeds the output voltage of the battery 120, it is output from the solar cell module 110 by the first DC-DC converter 220 receives the first pulse width modulation (PWM) signal The first DC-DC receiving the first pulse width modulation (PWM) signal when the output power of the solar cell module 110 does not exceed the output voltage of the battery 120. The power output from the solar cell module 110 is boosted by the converter 220 to charge the battery 120 (S502). Therefore, since the amount of electricity produced by the solar cell module 110 is small, even when the output voltage of the solar cell module 110 is lower than the output voltage of the battery 120, the battery 120 can be charged, thereby increasing charging efficiency.

In the charging of the battery 120, it is determined whether the output voltage of the battery 120 is greater than the overcharge set voltage (S503). The overcharge set voltage means a voltage that is a reference for determining overcharge. For example, the 12V battery may be 14.5V, and the 24V battery may be 28.5V.

When the voltage of the battery 120 is greater than or equal to the overcharge set voltage, the first pulse width modulation (PWM) signal that is determined to be overcharged and transmitted to the first DC-DC converter 220 is blocked (S504). Therefore, stop charging operation and turn on high voltage LED for external display.

In the overcharge state, it is determined whether the output voltage of the battery 120 is less than or equal to the charge recovery set voltage (S505). The charge recovery set voltage refers to a voltage which is a reference for returning from the overcharge state to the charge state. For example, the 12V battery may be 13V, and the 24V battery may be 26.5V.

When the output voltage of the battery 120 is equal to or lower than the charge recovery set voltage, it is determined that the battery 120 returns to the charging step and transmits a first pulse width modulation (PWM) signal to the first DC-DC converter 220 (S506). Therefore, restart the charging operation and turn off the high voltage LED for external display.

FIG. 6 is a flowchart illustrating the discharge step of FIG. 3 in detail. For the purpose of explanation, the drawings show a 24V storage battery as a reference.

Referring to FIG. 6, when it is determined as nighttime in the day / night determination step, it is determined whether the output voltage of the battery 120 exceeds the voltage of the lamp load 130 (S601).

When the output voltage of the battery 120 exceeds the voltage of the lamp load 130, the power output from the battery 120 is reduced by the second DC-DC converter 230 receiving the second pulse width modulation (PWM) signal. Supply to the lamp load 130, and if the output voltage of the battery 120 does not exceed the voltage of the lamp load 130, receives the second pulse width modulation (PWM) signal to the second DC-DC converter 230. The battery 120 is discharged to boost the power output from the battery 120 to supply the lamp load 130 (S602). Therefore, the DC output voltage of the battery can be provided as the rated voltage for turning on the lamp load.

In the discharging of the battery 120, it is determined whether the output voltage of the battery 120 is less than or equal to the overdischarge set voltage (S603). The over-discharge set voltage means a voltage that is a reference for determining over-discharge. For example, the 12V battery may be 10.5V, and the 24V battery may be 21.5V.

If the output voltage of the battery 120 is less than or equal to the overdischarge set voltage, the second pulse width modulation (PWM) signal that is determined to be overdischarged and transmitted to the second DC-DC converter 230 is blocked (S604). Therefore, stop the discharge operation and turn on the low voltage LED for external display.

In the over discharge state, it is determined whether the output voltage of the battery 120 is equal to or greater than the discharge return setting voltage (S605). The discharge return set voltage refers to a voltage which is a reference for returning from the over discharge state to the discharge state. For example, the 12V battery may be 12V, and the 24V battery may be 24V.

When the output voltage of the battery 120 is equal to or higher than the discharge return setting voltage, it is determined that the battery 120 returns to the discharge step and transmits a second pulse width modulation (PWM) signal to the second DC-DC converter 230. Therefore, the discharge operation is restarted and the low voltage LED is turned off for external display (S606).

7 is a view illustrating an impedance matching solar charging and discharging control device according to an embodiment of the present invention.

Figure 7 (a) is a view showing the front of the impedance matching solar charging and discharging control device 100 according to an embodiment of the present invention, Figure 7 (b) is an impedance matching solar charging and discharging control device FIG. 7C shows a rear view of the impedance matching type solar charge / discharge control device 100.

As shown in FIG. 7A, the impedance matching solar charging / discharging control device 100 according to an embodiment of the present invention includes a charging notification lamp 710, a high temperature notification lamp 720, and a low voltage notification lamp. 730 and the like, and a time setting switch 740 for setting the RTC control unit 250. In addition, the matched solar charging and discharging control device 100 is a solar cell module 110, the battery 120 and the solar cell connection terminal 750, the battery connection terminal 760 for connecting to the lamp light load 130 and It includes a light load connection terminal 770. The connection terminal is a solar cell connection terminal 750, where the connection terminal is shown as being implemented as six terminals in the center of Figure 7 (a), but is not necessarily limited to this, matching solar charge and discharge control According to the increase or decrease of the module connected to the device 100 may be implemented differently.

The above description is merely illustrative of the technical spirit of the embodiments of the present invention, and those skilled in the art to which the embodiments of the present invention belong may have various modifications and variations without departing from the essential characteristics of the embodiments of the present invention. will be. Therefore, the exemplary embodiments of the present invention are not intended to limit the technical spirit of the exemplary embodiment of the present invention but to describe the present invention, and the scope of the technical spirit of the exemplary embodiment of the present invention is not limited thereto. The scope of protection of the embodiments of the present invention should be construed by the claims below, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the embodiments of the present invention.

Claims (21)

Judging day / night using the output voltage and the current time of the solar cell module, and judging by daytime generates a first pulse width modulation (PWM) signal, and judging at night by the second pulse width modulation (PWM) signal A main control part that occurs;
A first DC-DC converter configured to charge or depressurize power output from the solar cell module by a first pulse width modulation (PWM) signal generated by the main controller; And
A second DC-DC converter for boosting or stepping down the electric power charged by the battery according to a second pulse width modulation (PWM) signal generated by the main controller and supplying it to a lamp load;
Impedance matching type solar charge and discharge control device comprising a. The method of claim 1,
The main fisherman,
Impedance matching solar charging and discharging control device, characterized in that the output voltage of the solar cell module lasts a predetermined time or less, and the current time is determined to be a night time. The method of claim 1,
The main fisherman,
Impedance matching solar charging and discharging control device, characterized in that the output voltage of the solar cell module lasts a predetermined time or more, and the current time passes a predetermined time is determined as the day. The method of claim 1,
An overcharge / over-discharge detector for detecting whether the battery is overcharged or overdischarged by comparing the output voltage of the battery with a predetermined voltage and transmitting the overcharge information or the overdischarge information to the main controller.
Impedance matching solar charge and discharge control device further comprising a. 5. The method of claim 4,
The main fisherman,
Blocking the first pulse width modulation (PWM) signal when receiving the overcharge information from the overcharge / over-discharge detection unit,
Impedance matching solar charging and discharging control device, characterized in that for blocking the second pulse width modulation (PWM) signal when receiving the over-discharge information from the over-charge / over-discharge detection unit. The method of claim 1,
Real time clock (RTC) control unit for generating the current time using a real time clock (RTC) reference time and transmitting the current time to the main control unit
Impedance matching solar charge and discharge control device further comprising a. The method according to claim 6,
Further comprising a communication unit for changing the RTC (Real Time Clock) reference time by an external computer connected to the communication port and transmitting to the main control unit,
The main fisherman,
Impedance matching solar charge and discharge control device characterized in that for transmitting the received Real Time Clock (RTC) reference time to the Real Time Clock (RTC) control unit. The method of claim 1,
A temperature sensor for detecting temperature change of the battery and transmitting temperature information to the main controller
Impedance matching solar charge and discharge control device further comprising a. 9. The method of claim 8,
The main fisherman,
When the temperature of the temperature information exceeds a predetermined temperature, the first pulse width modulation (PWM) signal is cut off,
Impedance matching solar light, characterized in that for transmitting the first pulse width modulation (PWM) signal if the temperature of the temperature information is less than another predetermined temperature after the first pulse width modulation (PWM) signal is cut off Charge / discharge control device. The method of claim 1,
Battery type detection unit for detecting the type of battery by comparing the output voltage of the battery within a predetermined voltage range
Impedance matching solar charge and discharge control device further comprising a. Solar cell module for converting sunlight into electrical energy; And
Impedance matching solar charging and discharging control device according to any one of claims 1 to 10
Impedance matching type solar charging and discharging lamp system comprising a. The method of claim 11,
A battery that charges the electric energy converted from the solar cell module and discharges to supply electric energy to the lamp load
Impedance-matching solar charging and discharging lamp system characterized in that it further comprises. The method of claim 12,
Lamp load that lights by using the electric energy supplied by the battery
Impedance-matching solar charging and discharging lamp system characterized in that it further comprises. In the impedance matching type solar charging and discharging control device to charge and discharge the battery,
An input step of using the inputted information when inputting predetermined information using a communication port from an external computer;
Day / night determination step of determining the day / night using the output voltage and the current time of the solar cell module;
If it is determined as the day, the charging step of charging the battery by boosting or stepping down the power output from the solar cell module by a first DC-DC converter receiving a first pulse width modulation (PWM) signal; And
If it is determined at night, the discharge step of supplying to the lamp load by boosting or stepping down the power charged in the battery by a second DC-DC converter receiving a second pulse width modulation (PWM) signal
Impedance matching solar charging and discharging control method comprising the irrespective of the order. 15. The method of claim 14,
Wherein the input step comprises:
Impedance-matching solar charging and discharging control method, characterized in that any one or more of the predetermined information, the day / night setting time, the day / night setting voltage, the overcharge / over discharge set voltage and the charge / discharge recovery set voltage. 16. The method of claim 15,
Wherein the input step comprises:
Impedance matching solar charging and discharging control method, characterized in that the non-information of the predetermined information using the existing stored information. 15. The method of claim 14,
The day / night judgment step,
Determining whether an output voltage of the solar cell module is lower than a night setting voltage;
Determining whether the output voltage of the solar cell module is lower than the night setting voltage for a predetermined time;
Determining whether the current time passes the night setting time when the output voltage of the solar cell module is equal to or less than the night setting voltage and continues for a predetermined time in the state;
Determining whether the current time is night, when the current time passes the night setting time;
Determining whether the output voltage of the solar cell module is greater than or equal to the weekly set voltage after the night time is determined;
If the output voltage of the solar cell module is equal to or greater than the weekly set voltage, determining whether the state lasts for a predetermined time;
Determining whether the current time passes the weekly setting time when the output voltage of the solar cell module is greater than the weekly setting voltage and continues for a predetermined time; And
If the current time has passed the weekly set time, determining the week
Impedance matching solar charging and discharging control method comprising a. 15. The method of claim 14,
The charging step,
Determining whether the output voltage of the solar cell module exceeds the output voltage of the battery when the day / night determination step is determined to be daytime;
When the output voltage of the solar cell module exceeds the output voltage of the battery, the first DC-DC converter receives a first pulse width modulation (PWM) signal to step down the power output from the solar cell module to charge the battery, If the output voltage of the solar cell module does not exceed the voltage of the battery step of boosting the power output from the solar cell module by the first DC-DC converter receiving a first pulse width modulation (PWM) signal to charge the battery ; And
Determining an overcharge in the charging of the battery
Impedance matching solar charging and discharging control method comprising a. 19. The method of claim 18,
Determining the overcharge,
Determining whether the output voltage of the battery is greater than the overcharge set voltage in the charging of the battery;
Blocking the first pulse width modulation (PWM) signal transmitted to the first DC-DC converter when the output voltage of the battery is greater than or equal to the overcharge set voltage;
Determining whether the output voltage of the battery is less than or equal to a charge recovery set voltage in the overcharge state; And
If it is determined that the output voltage of the battery is lower than or equal to the charge recovery set voltage, transmitting the first pulse width modulation (PWM) signal to the first DC-DC converter by determining that the battery is returned to the charging step.
Impedance matching solar charging and discharging control method comprising a. 15. The method of claim 14,
The discharge step,
Determining whether the output voltage of the battery exceeds the voltage of the lamp load when the night / night determination step is performed at night;
When the output voltage of the battery exceeds the voltage of the lamp load, the power output from the battery is stepped down by the second DC-DC converter receiving the second pulse width modulation (PWM) signal and supplied to the lamp load, and the output of the battery is output. Discharging the battery to boost the power output from the battery by the second DC-DC converter receiving the second pulse width modulation (PWM) signal to supply the lamp load if the voltage does not exceed the voltage of the lamp load; And
Determining an overdischarge in discharging the battery
Impedance matching solar charging and discharging control method comprising a. 21. The method of claim 20,
The determining of the over discharge,
Determining whether an output voltage of the battery is less than or equal to an overdischarge set voltage in the discharging of the battery;
Blocking the second pulse width modulation (PWM) signal that is determined to be over-discharged and transmitted to the second DC-DC converter when the output voltage of the battery is less than or equal to the over-discharge set voltage;
Determining whether an output voltage of the battery is equal to or greater than a discharge return setting voltage in the over discharge state; And
If the output voltage of the battery is equal to or higher than the discharge return setting voltage, determining that the battery has returned to the discharge step and transmitting a second pulse width modulation (PWM) signal to the second DC-DC converter;
Impedance matching solar charging and discharging control method comprising a.

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