Photovoltaic and commercial power mutual complementary energy supply system and device
By designing a complementary energy system for photovoltaic and municipal power, and using the combined power supply of municipal power and photovoltaic modules, the problem of unstable power supply of the photovoltaic power generation system is solved, and stable power output and flexible power supply regulation are achieved.
Patent Information
- Application Number
- CN202420386895.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-29
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-02-28
AI Technical Summary
The existing photovoltaic power generation system has unstable power supply due to weather reasons, making it difficult to achieve stable power output.
A photovoltaic and mains power complementary energy system was designed. Through the combination of AC-DC module, control module and DC-DC module, power supply is achieved by using the mains and photovoltaic modules to jointly supply power, so as to achieve the stability and flexibility of power supply.
The system can use mains power to power the load when photovoltaic power supply is weak (such as cloudy days and nights), ensuring the stability and reliability of power output, reducing the demand for additional voltage stabilization equipment, and reducing construction time and equipment costs.
Smart Images
Figure CN222638218U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaic components, and in particular to a photovoltaic and city power mutual energy supplementation system and device. Background Art
[0002] Solar energy is an inexhaustible renewable energy source for mankind. It has the advantages of being fully clean, absolutely safe, relatively extensive, truly long-lived and maintenance-free, with abundant resources and potential economy. It plays an important role in long-term energy strategies.
[0003] Photovoltaic power generation is a technology that uses the photovoltaic effect of semiconductor interfaces to directly convert light energy into electrical energy. After solar cells are connected in series and packaged for protection, they can form a large-area solar cell module, which is then combined with power controllers and other components to form a photovoltaic power generation device. However, photovoltaic power generation is subject to weather conditions and often has unstable power supply. Therefore, a technology that can be applied to the field of photovoltaic power generation and can output relatively stable power supply is needed. Utility Model Content
[0004] The embodiment of the utility model provides a photovoltaic and city power mutual energy supplementation system and device to solve the problem of unstable power supply caused by the photovoltaic power supply being restricted by weather reasons in the prior art.
[0005] In order to achieve the above purpose, the embodiment of the utility model provides the following technical solutions:
[0006] A photovoltaic and mains power complementary energy system comprises an AC-DC module, a control module and a DC-DC module, wherein the input end of the AC-DC module is connected to a mains power circuit, the output end of the AC-DC module is connected to the input end of the control module, the output end of the control module is connected to the input end of the DC-DC module, the output end of the DC-DC module is connected to a load, the input end of the control module is also connected to a photovoltaic component, and the output end of the control module is also connected to a battery; before the battery is fully charged, the control module controls the photovoltaic component and the mains power to charge the battery, and after the battery is fully charged, the control module controls the photovoltaic component and the mains power to supply power to the load.
[0007] Furthermore, the output end of the DC-DC module is connected to the input end of the fuse module, and the output end of the fuse module is connected to a load.
[0008] Furthermore, the output end of the AC-DC module is connected to the anode of the diode, and the cathode of the diode is connected to the control module.
[0009] Furthermore, the control module is connected to a temperature sensor and a cooling fan.
[0010] Furthermore, the control module is provided with a photovoltaic voltage monitoring submodule, a mains voltage monitoring submodule, a switch and a control submodule, and the control submodule is respectively connected to the photovoltaic voltage monitoring submodule, the mains voltage monitoring submodule and the switch.
[0011] Furthermore, the control module is provided with a communication submodule.
[0012] A photovoltaic and mains power mutual energy supplementing device comprises a shell, wherein an AC-DC module, a control module and a DC-DC module are arranged in the shell, a photovoltaic component access port, a mains power access port, a load access port and a battery access port are arranged on the shell, the control module is respectively connected to the AC-DC module, the DC-DC module, the photovoltaic component access port and the battery access port, the AC-DC module is connected to the mains power access port, and the DC-DC module is connected to the load access port.
[0013] Furthermore, a partition is provided in the shell, and the partition divides the shell into two layers, an upper layer and an lower layer. The control module is arranged in the upper layer, and the AC-DC module and the DC-DC module are arranged in the lower layer.
[0014] Furthermore, an air inlet is provided at one end of the shell, a temperature sensor connected to the control module is provided inside the shell, a cooling fan connected to the control module is provided at the other end of the shell, and the cooling fan covers the upper and lower layers of the shell.
[0015] Furthermore, a diode is provided in the shell, the output end of the AC-DC module is connected to the positive electrode of the diode, the negative electrode of the diode is connected to the control module, and the diode is fixedly connected to the heat sink.
[0016] The utility model embodiment has the following advantages:
[0017] The utility model provides a photovoltaic and city power mutual energy supplement system and device to achieve the technical harmony of city power supply and photovoltaic power supply, and regulate the power supply according to the respective characteristics of city power supply and photovoltaic power supply. For example, when the photovoltaic power supply is weak on cloudy days or at night, the city power is controlled to supply power to the battery or lithium battery, and then discharge the load. Moreover, the output voltage of this system is a stable voltage, and there is no need to connect additional equipment with voltage stabilization function, and the load can be directly powered, which reduces the construction time and overall equipment cost.
[0018] The utility model provides a photovoltaic and mains power complementary energy system and a device with diodes and fuses arranged inside, which can effectively ensure the normal operation of each module and have an extremely low equipment failure rate. Once the load is damaged or there is a problem with the user's wiring, the fuse can be replaced in time, and maintenance is convenient.
[0019] The utility model provides a photovoltaic and city power complementary energy system and a device with a built-in high-temperature heat dissipation function. When the temperature of the equipment is too high, the temperature control module is turned on and the heat dissipation fan works to conduct heat and cool down each module. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.
[0021] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.
[0022] Figure 1 A circuit schematic diagram of a photovoltaic and mains power mutual energy supplementation system provided in Example 1 of the utility model;
[0023] Figure 2 A circuit schematic diagram of another photovoltaic and city power mutual energy supplementation system provided in Example 1 of the utility model;
[0024] Figure 3 This is a schematic diagram of the internal circuit of a control module in a photovoltaic and mains power mutual energy supplementation system provided in Example 2 of the utility model;
[0025] Figure 4 This is a diagram of the internal structure of a photovoltaic and mains power complementary energy device provided in Example 3 of the utility model.
[0026] In the figure:
[0027] 1. Control module; 2. AC-DC module; 3. DC-DC module; 4. AC power circuit; 5. Load; 6. Battery; 7. Photovoltaic module; 8. Insurance module; 9. Diode; 10. Temperature sensor; 11. Cooling fan; 12. Photovoltaic voltage monitoring submodule; 13. AC power voltage monitoring submodule; 14. Switch; 15. Control submodule; 16. Partition; 17. Air inlet; 18. Air hole; 19. Heat sink. DETAILED DESCRIPTION
[0028] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0029] Example 1
[0030] like Figure 1 As shown, a photovoltaic and mains power complementary energy system includes an AC-DC module 2, a control module 1 and a DC-DC module 3. The input end of the AC-DC module 2 is connected to the mains circuit 4, the output end of the AC-DC module 2 is connected to the input end of the control module 1, the output end of the control module 1 is connected to the input end of the DC-DC module 3, the output end of the DC-DC module 3 is connected to a load 5, the input end of the control module 1 is also connected to a photovoltaic module 7, and the output end of the control module 1 is also connected to a battery 6. The control module 1 collects and monitors the voltage, current and other parameters of the battery 6. Before the battery 6 is not fully charged, the control module 1 has a built-in switch circuit that turns on the load 5, which is used to control the photovoltaic module 7 and the mains to charge the battery 6; after the battery 6 is fully charged, the control module 1 controls the photovoltaic module 7 and the mains to supply power to the load 5. This embodiment does not limit the control module 1, but the control module 1 needs to have a voltage transformation function for supplying power to the photovoltaic component 7. For example, the product models of the control module 1 are HC2410, HC2420, and HC2430, corresponding to load 5 range ≤120w, load 5 range ≤240w, and load 5 range ≤360w, respectively.
[0031] like Figure 2 As shown, the output end of the DC-DC module 3 is connected to the input end of the fuse module 8, and the output end of the fuse module 8 is connected to the load 5. If a fuse is provided between the DC-DC module 3 and the load 5, a short-circuit protection function of the load 5 is realized. Once the load 5 is damaged or there is a problem with the wiring of the load 5, that is, when the load 5 is short-circuited or overcurrent occurs, the fuse module 8 directly cuts off the output of the load 5. After that, only the fuse module 8 needs to be replaced, which is convenient and safe to maintain.
[0032] The output end of the AC-DC module 2 is connected to the positive electrode of the diode 9, and the negative electrode of the diode is connected to the control module 1. When the battery 6 is fully charged and the voltage value charged by the photovoltaic module 7 to the battery 6 is greater than the voltage value output by the AC-DC module 2 of the mains, the diode 9 will protect the ACDC module, avoiding the problem of damage to the AC-DC module 2 caused by the DC voltage backflow.
[0033] The control module 1 is connected to the temperature sensor 10 and the cooling fan 11, so that the system has a high-temperature heat dissipation function. When the ambient temperature of the system collected by the temperature sensor 10 is too high, the control module 1 turns on the cooling fan 11 to conduct heat and cool down each module in the system.
[0034] The control module 1 is provided with a communication submodule for uploading the input voltage, current and other parameters of the photovoltaic module 7 to the host computer, and also for uploading the voltage, current and other parameters of the battery 6 to the host computer.
[0035] Example 2
[0036] Since this technology is a technology that allows the coexistence of mains and photovoltaic charging, charging options can be selected based on the characteristics of mains and photovoltaic charging. Photovoltaic charging is a new energy source and is a high-level charging option, while mains is a low-level charging option. However, photovoltaic charging is affected by the weather, such as when it is cloudy or at night, the charging is weak. Based on Example 1, this technology adds charging options, such as Figure 3 As shown, a photovoltaic voltage monitoring submodule 12, a mains voltage monitoring submodule 13, a switch 14 and a control submodule 15 are provided in the control module 1. The switch 14 is preferably a single-pole double-throw switch 14. The control submodule 15 is respectively connected to the photovoltaic voltage monitoring submodule 12, the mains voltage monitoring submodule 13 and the switch 14. The photovoltaic voltage monitoring submodule 12 is used to monitor the output voltage of photovoltaic charging. Since the voltage of the battery 6 itself is the same as the mains voltage, the mains voltage monitoring submodule 13 is used to monitor the voltage of the battery 6 itself. The control submodule 15 compares the two voltages. If the output voltage of the photovoltaic component 7 is higher than the voltage of the battery 6 itself, the control switch 14 turns off the mains charging; if the output voltage of the photovoltaic component 7 is lower than the voltage of the battery 6 itself, the control switch 14 turns off the photovoltaic charging.
[0037] Example 3
[0038] like Figure 4 As shown, a photovoltaic and mains power complementary energy device includes a shell, in which an AC-DC module 2, a control module 1 and a DC-DC module 3 are arranged, and the shell is provided with a photovoltaic component 7 access port, a mains power access port, a load 5 access port, and a battery 6 access port. The control module 1 is respectively connected to the AC-DC module 2, the DC-DC module 3, the photovoltaic component 7 access port, and the battery 6 access port, the AC-DC module 2 is connected to the mains power access port, and the DC-DC module 3 is connected to the load 5 access port.
[0039] A partition 16 is provided in the shell, and the partition 16 divides the shell into two layers, the control module 1 is arranged in the upper layer, and the AC-DC module 2 and the DC-DC module 3 are arranged in the lower layer, which is used to separate the high-heat control module 1 from the other modules, free up space around the control module 1, and facilitate the heat dissipation of the control module 1.
[0040] An air inlet 17 is provided at one end of the housing, a temperature sensor 10 connected to the control module 1 is provided inside the housing, and a cooling fan 11 connected to the control module 1 is provided at the other end of the housing. The cooling fan 11 covers the upper and lower layers of the housing, and an air hole 18 is provided on the partition plate 16 to facilitate heat dissipation of the upper and lower layers.
[0041] A diode 9 is provided in the housing, the output end of the AC-DC module 2 is connected to the positive electrode of the diode 9, the negative electrode of the diode is connected to the control module 1, and the diode 9 is fixedly connected to the heat sink 19. In this embodiment, the diode 9 is preferably arranged in the upper layer, so that only the diode 9 and the control module 1 arranged in the upper layer are both high-heat modules, but the volumes of the two are small, so that the interval between the diode 9 and the control module 1 is large, which is conducive to the heat dissipation of the two.
[0042] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.
Claims
1. A photovoltaic and city electricity complementary energy system, characterized in that: It includes an AC-DC module, a control module and a DC-DC module, wherein the input end of the AC-DC module is connected to the mains circuit, the output end of the AC-DC module is connected to the input end of the control module, the output end of the control module is connected to the input end of the DC-DC module, the output end of the DC-DC module is connected to a load, the input end of the control module is also connected to a photovoltaic module, and the output end of the control module is also connected to a battery; Before the storage battery is fully charged, the control module controls the photovoltaic assembly and the mains to charge the storage battery. After the storage battery is fully charged, the control module controls the photovoltaic assembly and the mains to supply power to the load.
2. A photovoltaic and mains power supply system according to claim 1, characterized in that: The output end of the DC-DC module is connected to the input end of the insurance module, and the output end of the insurance module is connected to the load.
3. A photovoltaic and mains power supply system according to claim 1, characterized in that: The output end of the AC-DC module is connected to the anode of the diode, and the cathode of the diode is connected to the control module.
4. A photovoltaic and mains power supply system according to claim 1, characterized in that: The control module is connected to the temperature sensor and the cooling fan.
5. The photovoltaic and city power complementary energy system according to claim 1, characterized in that: The control module is provided with a photovoltaic voltage monitoring submodule, a mains voltage monitoring submodule, a switch and a control submodule, and the control submodule is respectively connected to the photovoltaic voltage monitoring submodule, the mains voltage monitoring submodule and the switch.
6. A photovoltaic and city power complementary energy system according to claim 1, characterized in that: The control module is provided with a communication submodule.
7. A photovoltaic and city electricity complementary energy device, characterized in that: It comprises a shell, in which an AC-DC module, a control module and a DC-DC module are arranged, and a photovoltaic component access port, a mains access port, a load access port and a battery access port are arranged on the shell, the control module is respectively connected to the AC-DC module, the DC-DC module, the photovoltaic component access port and the battery access port, the AC-DC module is connected to the mains access port, and the DC-DC module is connected to the load access port.
8. A photovoltaic and city power mutual energy supplementation device according to claim 7, characterized in that: A partition is arranged in the shell, and the partition divides the shell into two layers, the upper layer and the lower layer. The control module is arranged in the upper layer, and the AC-DC module and the DC-DC module are arranged in the lower layer.
9. A photovoltaic and city power mutual energy supplementation device according to claim 7, characterized in that: An air inlet is provided at one end of the shell, a temperature sensor connected to the control module is provided inside the shell, a cooling fan connected to the control module is provided at the other end of the shell, and the cooling fan covers the upper layer and the lower layer of the shell.
10. A photovoltaic and city power complementary energy device according to claim 8, characterized in that: A diode is arranged in the shell, the output end of the AC-DC module is connected to the positive electrode of the diode, the negative electrode of the diode is connected to the control module, and the diode is fixedly connected to the heat sink.