A photovoltaic lighting system

Abstract

The utility model provides a kind of photovoltaic lighting system, and the first connecting circuit between photovoltaic panel to battery is equipped with bidirectional DC / DC module, and the second connecting circuit between LED light source to the first connecting circuit is equipped with first DC / DC module, and the control port of bidirectional DC / DC module and first DC / DC module is electrically connected with main control module respectively, when sufficient illumination and battery need to be charged, bidirectional DC / DC module switches to electric energy positive flow mode, photovoltaic panel generates electric energy and is transmitted to battery charging storage through the first connecting circuit, in light period, bidirectional DC / DC module switches to electric energy reverse flow mode, battery discharges, and electric energy is transmitted to LED light source for energy supply through the first connecting circuit and the second connecting circuit, and power limiting protection module is used to adjust the electric energy power output by photovoltaic panel. Through the utility model, the wiring difficulty and cost of photovoltaic lighting system can be effectively simplified.

Description

Technical Field

[0001] This utility model belongs to the field of clean energy technology, and in particular relates to a photovoltaic lighting system. Background Technology

[0002] A photovoltaic lighting system is a system that uses solar energy for lighting. Its main structure typically includes photovoltaic panels, batteries, and lighting equipment. The photovoltaic panels can generate electricity based on solar energy and store it in the batteries, which can then be used to power the lighting equipment to provide illumination.

[0003] However, under current technology, traditional photovoltaic lighting systems typically employ a multi-bus design for power transmission between photovoltaic panels, batteries, and lighting equipment. Specifically, the photovoltaic panels charge the batteries via a separate charging bus, while the batteries are connected to the lighting equipment via another discharging bus to provide illumination at night or in low-light conditions. While this multi-bus architecture enables unidirectional power transfer, it results in high wiring complexity, and the use of multiple buses increases the difficulty of wiring the photovoltaic lighting system. Furthermore, the fixed power output of photovoltaic panels in traditional systems cannot be automatically adjusted based on the actual power demand of the lighting equipment and the actual charging and energy storage status of the batteries, making the lighting equipment and batteries susceptible to overload damage. Utility Model Content

[0004] This invention provides a photovoltaic lighting system to solve the technical problems of conventional photovoltaic lighting systems in the prior art, which adopt a multi-bus architecture, have high power supply line complexity, and cannot adjust the power output of the photovoltaic panels according to the real-time working status of the lighting equipment and batteries.

[0005] To solve the above problems, the technical solution of this utility model is: a photovoltaic lighting system, including: a photovoltaic panel, a battery, an LED light source, an IoT DC power supply, a power limiting protection module, and a communication module; The IoT DC power supply includes a main control module, a bidirectional DC / DC module, and a first DC / DC module; The first connection circuit between the photovoltaic panel and the battery is provided with the bidirectional DC / DC module. The power output port of the photovoltaic panel is connected to the first bidirectional interface of the bidirectional DC / DC module, and the power charging and discharging port of the battery is connected to the second bidirectional interface of the bidirectional DC / DC module. The second connection circuit between the LED light source and the first connection circuit is provided with the first DC / DC module. The unidirectional input interface of the first DC / DC module is connected to the first connection circuit, and the unidirectional output interface of the first DC / DC module is connected to the power input port of the LED light source. The control port of the bidirectional DC / DC module is electrically connected to the main control module; The power limiting protection module is located at the photovoltaic panel power output port of the first connection circuit, and is used to adjust the power output of the photovoltaic panel to the first connection circuit according to the working voltage of the LED light source and the state of charge of the battery. The communication module is electrically connected to the main control module. The communication module is configured to communicate with an external system platform to receive control signals from the external system platform and to upload data from the photovoltaic lighting system to the external system platform. The photovoltaic lighting system is configured such that, when there is sufficient light and the battery needs to be charged, the bidirectional DC / DC module switches to a forward power flow mode, the photovoltaic panel generates electrical energy and transmits it to the battery for charging and storage through the first connection circuit; during the lighting period, the bidirectional DC / DC module switches to a reverse power flow mode, the battery discharges, and the electrical energy is transmitted to the LED light source for power supply through the first connection circuit and the second connection circuit.

[0006] Preferably, the first connection circuit from the photovoltaic panel to the bidirectional DC / DC module is provided with a bus metering module, which is used to measure the voltage and current parameters of the first connection circuit. The first connection circuit from the battery to the bidirectional DC / DC module is equipped with a battery metering module, which is used to measure the voltage and current parameters of the battery.

[0007] Preferably, the second connection circuit from the LED light source to the first DC / DC module is provided with an LED metering module, which is used to measure the voltage and current parameters of the LED light source.

[0008] Preferably, the communication ports of the bus metering module, the battery metering module, and the LED metering module are electrically connected to the main control module.

[0009] Preferably, a second DC / DC module is provided in the third connection circuit between the communication module and the main control module and the first connection circuit; The unidirectional input interface of the second DC / DC module is connected to the first connection circuit, the first unidirectional output interface of the second DC / DC module is connected to the power input port of the communication module, and the second unidirectional output interface of the DC / DC module is connected to the power input port of the main control module. The photovoltaic panel and / or the battery are further configured to power the communication module and the main control module via the second DC / DC module, and the bus metering module is further configured to measure the voltage and current parameters of the communication module and the main control module.

[0010] Preferably, the third connection circuit from the main control module to the second DC / DC module includes a voltage conversion module, which is used to convert the voltage of the electrical energy provided by the photovoltaic panel and / or the battery to a voltage compatible with the main control module.

[0011] Preferably, an auxiliary power source module is also provided, and a third DC / DC module is provided in the fourth connection circuit between the auxiliary power source module and the first connection circuit. The unidirectional input interface of the third DC / DC module is connected to the first connection circuit, and the unidirectional output interface of the third DC / DC module is connected to the power input port of the auxiliary power source module.

[0012] Preferably, the fourth connection circuit from the auxiliary source module to the third DC / DC module includes an auxiliary source metering module, which is used to measure the voltage and current parameters of the auxiliary source module.

[0013] Preferably, the communication port of the auxiliary source metering module is electrically connected to the main control module.

[0014] Preferably, the first connection circuit has a control switch at the power output port of the photovoltaic panel, and the control port of the control switch is electrically connected to the main control module. The control switch is configured to switch to an interrupt mode when the battery is discharging, so as to block the reverse transmission of electrical energy to the power output port of the photovoltaic panel.

[0015] Preferably, the communication module is externally mounted independently of the IoT DC power supply.

[0016] This utility model, by adopting the above technical solution, has the following advantages and positive effects compared with the prior art: This utility model provides a photovoltaic lighting system, comprising a photovoltaic panel, a battery, an LED light source, and a main control module. The photovoltaic panel and the battery are connected by an independent first connection circuit, and the LED light source and the first connection circuit are connected by an independent second connection circuit. The first connection circuit includes a bidirectional DC / DC module. Based on the bidirectional power flow characteristics of the bidirectional DC / DC module, the power generated by the photovoltaic panel from solar energy is transmitted to the battery for charging and storage via a single bus, and the battery is also discharged. Power is then transmitted in reverse to the LED light source via the same single bus, greatly simplifying the wiring difficulty and reducing the cost of the photovoltaic lighting system. Simultaneously, a power limiting protection module is provided at the power output port of the photovoltaic panel. This module can automatically and flexibly adjust the power output from the photovoltaic panel to the first connection circuit based on the operating voltage of the LED light source and the state of charge of the battery, effectively improving the stability and lifespan of the LED light source and the battery. Attached Figure Description

[0017] Figure 1 This utility model provides a structural schematic diagram of a photovoltaic lighting system.

[0018] Explanation of reference numerals in the attached diagram: 1: Photovoltaic panel; 2: Battery; 3: Bidirectional DC / DC module; 4: LED light source; 5: First DC / DC module; 6: Bus metering module; 7: Battery metering module; 8: LED metering module; 9: Main control module; 10: Communication module; 11: Second DC / DC module; 12: Voltage conversion module; 13: Auxiliary power source module; 14: Third DC / DC module; 15: Auxiliary power source metering module; 16: Control switch; 17: Power limiting protection module. Detailed Implementation

[0019] The photovoltaic lighting system proposed in this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this utility model will become clearer from the following description and claims.

[0020] See Figure 1 This embodiment provides a photovoltaic lighting system for realizing the photoelectric conversion of clean solar energy and the peak-shaving storage and use of electrical energy. The main structure of the photovoltaic lighting system includes a photovoltaic panel 1, a battery 2, an LED light source 4, an IoT DC power supply, a power limiting protection module 17, and a communication module 10.

[0021] The IoT DC power supply refers to a DC power supply device or system applied in Internet of Things (IoT) devices, including but not limited to various sensors, controllers, etc. In this embodiment, the IoT DC power supply specifically includes a main control module 9 (such as an MCU), various DC / DC modules and auxiliary power source module 13, etc.

[0022] The photovoltaic panel 1 and the battery 2 are electrically connected via a first connection circuit, which can be understood as an independent bus. This first connection circuit includes a bidirectional DC / DC module 3, which is a power electronic device that supports bidirectional power flow. Specifically, the power output port of the photovoltaic panel 1 is connected to the first bidirectional interface of the bidirectional DC / DC module 3, and the power charging / discharging port of the battery 2 is connected to the second bidirectional interface of the bidirectional DC / DC module 3.

[0023] The LED light source 4 is electrically connected to the first connection circuit via a second connection circuit. The second connection circuit includes a first DC / DC module 5. In this embodiment, the DC / DC module refers to a unidirectional DC / DC module, which is a power electronic device that only supports the flow of electrical energy in a fixed direction. Specifically, the unidirectional input interface of the first DC / DC module 5 is connected to the first connection circuit, and the unidirectional output interface of the first DC / DC module 5 is connected to the power input port of the LED light source 4.

[0024] The control port of the bidirectional DC / DC module 3 is electrically connected to the main control module 9. The main control module 9 can be used to control the switching between the forward and reverse power flow modes of the bidirectional DC / DC module 3.

[0025] In another embodiment, the control port of the first DC / DC module 5 may also be electrically connected to the main control module 9, and the main control module 9 may also be used to control the first DC / DC module 5 to switch between interruption and connection.

[0026] The power limiting protection module 17 is a device used to control and protect electrical equipment from damage caused by excessive power. In this embodiment, the power limiting protection module 17 is located at the photovoltaic power output port of the first connection circuit. The power limiting protection module 17 can be directly connected to the main control module 9, or it can be connected to the monitoring units of the LED light source 4 and the battery 2 respectively. That is, the power limiting protection module 17 is used to adjust the power output of the photovoltaic panel 1 to the first connection circuit according to the working voltage of the LED light source 4 and the state of charge of the battery 2, so as to prevent the power generated by the photovoltaic panel 1 from exceeding the bearing capacity of the LED light source 4 and the battery 2, thereby improving the stability and service life of the LED light source 4 and the battery 2.

[0027] The communication module 10 is electrically connected to the main control module 9. The communication module 10 is configured to communicate with an external system platform. The communication connection includes wired connection and wireless connection. The communication module 10 is used to receive control signals sent from the external system platform to the photovoltaic lighting system and to upload data of the photovoltaic lighting system to the external system platform, so as to realize remote control and operating condition monitoring of the photovoltaic lighting system.

[0028] In this embodiment, the photovoltaic lighting system is configured such that, when there is sufficient sunlight and the battery needs charging, the main control module 9 controls the bidirectional DC / DC module 3 to switch to a forward power flow mode. That is, electrical energy is input through the first bidirectional interface of the bidirectional DC / DC module 3 and output through its second bidirectional interface. During periods of sufficient sunlight, the photovoltaic panel 1 converts solar energy into electrical energy. This electrical energy is transmitted through the first connection circuit and the bidirectional DC / DC module 3 to the battery 2 for charging and storage, and also through the first and second connection circuits to the LED light source 4 for power supply, thus enabling the LED light source 4 to provide lighting. Conversely, during periods when lighting is required, the main control module 9 controls the bidirectional DC / DC module 3 to switch to a reverse power flow mode. That is, electrical energy is input through the second bidirectional interface of the bidirectional DC / DC module 3 and output through its first bidirectional interface. Furthermore, the electrical energy in the first connection circuit can be further transmitted to the LED light source 4 through the second connection circuit. During periods of insufficient sunlight, the photovoltaic panel 1 cannot generate electrical energy, causing the battery 2 to discharge. The electrical energy is then transmitted through the first and second connection circuits to the LED light source 4 for power supply, thus enabling the LED light source 4 to provide lighting.

[0029] In another embodiment, if the LED light source 4 does not require illumination during periods of sufficient light, the main control module 9 can select to control the first DC / DC module 5 to interrupt and switch the power supply to the LED light source 4.

[0030] Therefore, in this embodiment, the photovoltaic panel 1 and the battery 2 are connected by an independent first connection circuit, and the LED light source 4 is connected to the first connection circuit by an independent second connection circuit. The first connection circuit is equipped with a bidirectional DC / DC module 3. Based on the bidirectional power flow characteristics of the bidirectional DC / DC module 3, the power generated by the photovoltaic panel 1 from solar energy is transmitted to the battery 2 for charging and storage through a single bus, and the power is also transmitted back to the LED light source 4 through the single bus when the battery 2 discharges. This greatly simplifies the wiring difficulty and cost of the photovoltaic lighting system. At the same time, a power limiting protection module 17 is provided at the power output port of the photovoltaic panel 1. The power limiting protection module 17 can automatically and flexibly adjust the power output of the photovoltaic panel 1 to the first connection circuit according to the operating voltage of the LED light source 4 and the state of charge of the battery 2, effectively improving the stability and service life of the LED light source 4 and the battery 2.

[0031] The specific layout structure and function of the photovoltaic lighting system provided in this embodiment will be described in further detail below: Preferably, in one embodiment, a bus metering module 6 is provided in the first connection circuit from the photovoltaic panel 1 to the bidirectional DC / DC module 3. The bus metering module 6 is used to measure the voltage and current parameter values ​​of the first connection circuit.

[0032] The first connection circuit from battery 2 to bidirectional DC / DC module 3 includes a battery metering module 7, which is used to measure the voltage and current parameters of battery 2.

[0033] In this embodiment, the voltage and current parameters of battery 2 will change accordingly as the stored power increases or decreases. Therefore, the voltage and current parameters of bus and battery 2 can be monitored in real time by bus metering module 6 and battery metering module 7 respectively, so as to cooperate with bidirectional DC / DC module 3 to accurately and efficiently realize bidirectional power transmission.

[0034] In another embodiment, the main control module 9 may autonomously control the bidirectional transmission of electrical energy according to the time period.

[0035] Preferably, in one embodiment, an LED metering module 8 is provided in the second connection circuit between the LED light source 4 and the first DC / DC module 5. The LED metering module 8 is used to measure the voltage and current parameters of the LED light source 4. When the LED light source 4 fails to work properly, the voltage and current parameters measured by the LED metering module 8 in conjunction with the bus metering module 6 can determine whether the fault lies in the bus, the LED light source 4, or the first DC / DC module 5, thus achieving accurate fault location and rapid maintenance.

[0036] Preferably, in one embodiment, the communication ports of the bus metering module 6, the battery metering module 7, and the LED metering module 8 are electrically connected to the main control module 9, which can further transmit the voltage and current parameter values ​​measured for the bus, battery 2, and LED light source 4 to the main control module 9, so that the main control module 9 can adjust the direction of power transmission and the charging and discharging operation of the battery 2 based on the real-time data of the bus, battery 2, and LED light source 4.

[0037] Specifically, in one embodiment, the power limiting protection module 17 can be electrically connected to the bus metering module 6, the battery metering module 7, and the LED metering module 8, thereby obtaining the operating voltage of the LED light source 4 and the state of charge of the battery 2.

[0038] Preferably, in one embodiment, a second DC / DC module 11 is provided in the third connection circuit between the communication module 10 and the main control module 9 and the first connection circuit.

[0039] Specifically, the unidirectional input interface of the second DC / DC module 11 is connected to the first connection circuit, the first unidirectional output interface of the second DC / DC module 11 is connected to the power input port of the communication module 10, and the second unidirectional output interface of the DC / DC module is connected to the power input port of the main control module 9.

[0040] In this embodiment, the photovoltaic panel 1 and / or battery 2 are also configured to supply power to the communication module 10 and the main control module 9 via the second DC / DC module 11, and the bus metering module 6 is also configured to measure the voltage and current parameters of the communication module 10 and the main control module 9. Therefore, the communication module 10 and the main control module 9 do not need to be equipped with additional power supply devices, which greatly simplifies the structural design of the photovoltaic lighting system.

[0041] Preferably, in one embodiment, a voltage conversion module 12 is provided in the third connection circuit between the main control module 9 and the second DC / DC module 11. The voltage conversion module 12 is used to convert the voltage of the electrical energy provided by the photovoltaic panel 1 and / or the battery 2 to be compatible with the main control module 9, so as to ensure that the main control module 9 is provided with a stable and appropriate power supply voltage.

[0042] Preferably, in one embodiment, the photovoltaic lighting system further includes an auxiliary source module 13. The auxiliary source module specifically includes an auxiliary source protection unit, an auxiliary source output interface, and a group of peripheral devices. The auxiliary source protection unit is used to prevent the peripheral devices from stopping operation or even being damaged due to electrical problems in the circuit (such as overvoltage, overcurrent, voltage surge, short circuit, etc.). The auxiliary source output interface is used to provide various physical interfaces for connecting the peripheral devices to the fourth connection circuit. The peripheral devices include cameras, temperature and humidity detection devices, etc. The auxiliary source module 13 is used to collect environmental information about the photovoltaic lighting system itself and its surroundings, and transmit it to the business management cloud platform through the communication module 10.

[0043] The fourth connection circuit between the auxiliary power source module 13 and the first connection circuit is provided with a third DC / DC module 14. The unidirectional input interface of the third DC / DC module 14 is connected to the first connection circuit, and the unidirectional output interface of the third DC / DC module 14 is connected to the power input port of the auxiliary power source module 13. That is, the auxiliary power source module 13 is also powered by the photovoltaic panel 1 and / or the battery 2.

[0044] Preferably, in one embodiment, an auxiliary source metering module 15 is provided in the fourth connection circuit between the auxiliary source module 13 and the third DC / DC module 14. The auxiliary source metering module 15 is used to measure the voltage and current parameter values ​​of the auxiliary source module 13. Similarly, when the auxiliary source module 13 fails to work properly, the voltage and current parameter values ​​measured by the auxiliary source metering module 15 in conjunction with the bus metering module 6 can determine whether the fault lies in the bus, the auxiliary source module 13, or the third DC / DC module 14, thus achieving accurate fault location and rapid maintenance.

[0045] Preferably, in one embodiment, the communication port of the auxiliary source metering module 15 is electrically connected to the main control module 9, which can further transmit the voltage and current parameter values ​​measured by the auxiliary source module 13 to the main control module 9, so that the main control module 9 can monitor the operating status of the auxiliary source module 13.

[0046] Specifically, in one embodiment, the power limiting protection module 17 can also be electrically connected to the auxiliary source metering module 15 to obtain the operating voltage of the peripheral device group in the auxiliary source module 13, thereby adjusting the output of the photovoltaic panel 1 to the first connection circuit and further supplying the power to the auxiliary source module 13.

[0047] Preferably, in one embodiment, the first connection circuit is provided with a control switch 16 at the power output port of the photovoltaic panel 1, and the control port of the control switch 16 is electrically connected to the main control module 9. The control switch 16 is configured to switch to the interrupt mode when the battery 2 is discharging, so as to block the reverse transmission of electrical energy to the power output port of the photovoltaic panel 1 and prevent the photovoltaic panel 1 from being damaged. Conversely, when the photovoltaic panel 1 generates electrical energy through photoelectric conversion, the control switch 16 switches to the on mode, and the electrical energy can be transmitted to the battery 2 for charging and storage along the first connection circuit.

[0048] Preferably, in one embodiment, the communication module is an independent external device relative to the IoT DC power supply.

[0049] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A photovoltaic lighting system, characterized in that, include: Photovoltaic panels, batteries, LED light sources, IoT DC power supplies, power limiting protection modules, and communication modules; The IoT DC power supply includes a main control module, a bidirectional DC / DC module, and a first DC / DC module; The first connection circuit between the photovoltaic panel and the battery is provided with the bidirectional DC / DC module. The power output port of the photovoltaic panel is connected to the first bidirectional interface of the bidirectional DC / DC module, and the power charging and discharging port of the battery is connected to the second bidirectional interface of the bidirectional DC / DC module. The second connection circuit between the LED light source and the first connection circuit is provided with the first DC / DC module. The unidirectional input interface of the first DC / DC module is connected to the first connection circuit, and the unidirectional output interface of the first DC / DC module is connected to the power input port of the LED light source. The control port of the bidirectional DC / DC module is electrically connected to the main control module; The power limiting protection module is located at the photovoltaic panel power output port of the first connection circuit, and is used to adjust the power output of the photovoltaic panel to the first connection circuit according to the working voltage of the LED light source and the state of charge of the battery. The communication module is electrically connected to the main control module. The communication module is configured to communicate with an external system platform to receive control signals from the external system platform and to upload data from the photovoltaic lighting system to the external system platform. The photovoltaic lighting system is configured such that when there is sufficient light and the battery needs to be charged, the bidirectional DC / DC module switches to a forward power flow mode, and the photovoltaic panel generates electrical energy and transmits it to the battery for charging and storage through the first connection circuit; During the lighting period, the bidirectional DC / DC module switches to reverse power flow mode, the battery discharges, and the power is transmitted to the LED light source through the first connection circuit and the second connection circuit.

2. The photovoltaic lighting system as described in claim 1, characterized in that, The first connection circuit from the photovoltaic panel to the bidirectional DC / DC module is equipped with a bus metering module, which is used to measure the voltage and current parameters of the first connection circuit. The first connection circuit from the battery to the bidirectional DC / DC module is equipped with a battery metering module, which is used to measure the voltage and current parameters of the battery.

3. The photovoltaic lighting system as described in claim 2, characterized in that, An LED metering module is provided in the second connection circuit between the LED light source and the first DC / DC module. The LED metering module is used to measure the voltage and current parameters of the LED light source.

4. The photovoltaic lighting system as described in claim 3, characterized in that, The communication ports of the bus metering module, the battery metering module, and the LED metering module are electrically connected to the main control module.

5. The photovoltaic lighting system as described in claim 2, characterized in that, A second DC / DC module is provided in the third connection circuit between the communication module and the main control module and the first connection circuit; The unidirectional input interface of the second DC / DC module is connected to the first connection circuit, the first unidirectional output interface of the second DC / DC module is connected to the power input port of the communication module, and the second unidirectional output interface of the DC / DC module is connected to the power input port of the main control module. The photovoltaic panel and / or the battery are further configured to power the communication module and the main control module via the second DC / DC module, and the bus metering module is further configured to measure the voltage and current parameters of the communication module and the main control module.

6. The photovoltaic lighting system as described in claim 5, characterized in that, The third connection circuit from the main control module to the second DC / DC module includes a voltage conversion module, which is used to convert the voltage of the electrical energy provided by the photovoltaic panel and / or the battery to a voltage that is compatible with the main control module.

7. The photovoltaic lighting system as described in claim 1, characterized in that, An auxiliary power source module is also provided. A third DC / DC module is provided in the fourth connection circuit between the auxiliary power source module and the first connection circuit. The unidirectional input interface of the third DC / DC module is connected to the first connection circuit, and the unidirectional output interface of the third DC / DC module is connected to the power input port of the auxiliary power source module.

8. The photovoltaic lighting system as described in claim 7, characterized in that, An auxiliary source metering module is provided in the fourth connection circuit from the auxiliary source module to the third DC / DC module. The auxiliary source metering module is used to measure the voltage and current parameter values ​​of the auxiliary source module.

9. The photovoltaic lighting system as described in claim 8, characterized in that, The communication port of the auxiliary source metering module is electrically connected to the main control module.

10. The photovoltaic lighting system as described in claim 1, characterized in that, The first connection circuit has a control switch at the power output port of the photovoltaic panel, and the control port of the control switch is electrically connected to the main control module. The control switch is configured to switch to interrupt mode when the battery is discharging, so as to block the reverse transmission of electrical energy to the power output port of the photovoltaic panel.

11. The photovoltaic lighting system as described in claim 1, characterized in that, The communication module is externally mounted independently of the IoT DC power supply.

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