Energy storage type direct current charging pile integrated with photovoltaic MPPT

Abstract

The utility model relates to new energy charging equipment technical field especially integrated photovoltaic MPPT's energy storage type direct current charging pile, including installation bottom plate, the top of installation bottom plate is separately installed with energy storage battery box, water storage tank and canopy through bolt, the top and the front side of energy storage battery box are fixedly installed with MPPT control module and charging pile module, the top of canopy is installed with photovoltaic power generation module through bolt, the bottom of photovoltaic power generation module is installed with input interface module through bolt. Electric energy is transported to MPPT control module and is powered to direct current bus module through input interface module, and is charged to charging pile module through the coordination of energy management unit, can track photovoltaic maximum power point in real time, improves energy conversion efficiency, and stores the surplus energy into energy storage battery box simultaneously, so when photovoltaic is insufficient, energy storage battery box supplies power through bidirectional DC / DC converter, reduces conversion loss, effectively improves energy utilization.

Description

Technical Field

[0001] This utility model relates to the field of new energy charging equipment technology, specifically to an energy storage DC charging pile with integrated photovoltaic MPPT. Background Technology

[0002] New energy charging equipment refers to equipment that provides electrical energy to electric vehicles. It mainly includes charging piles, which are electrical devices that are fixedly installed in public or private places to provide charging services for electric vehicles. According to the charging type, they can be divided into AC charging piles and DC charging piles.

[0003] A search revealed that the announcement number is CN222329508U, and the name is "A Photovoltaic Self-Generating Battery Energy Storage Charging Pile, including an installation platform." Research and analysis revealed that although the photovoltaic panels can absorb solar energy to the maximum efficiency and store the solar energy through the energy storage system inside the energy storage box, thereby reducing the energy consumption cost of the charging pile itself, it still has the following defects to a certain extent.

[0004] For example, the above-mentioned device is an energy storage system directly connected to a charging pile. Due to the large fluctuations in photovoltaic power generation, direct connection to the charging pile will lead to low efficiency. Moreover, the photovoltaic MPPT function is not effectively integrated, resulting in low energy utilization and insufficient system efficiency. At the same time, it cannot automatically clean dust and other debris on the surface of the photovoltaic panel, which will reduce the output power of the photovoltaic panel and affect the power generation. In order to solve the above technical problems, we have designed an energy storage DC charging pile that integrates photovoltaic MPPT. Utility Model Content

[0005] The purpose of this invention is to provide an energy storage DC charging pile with integrated photovoltaic MPPT, which features direct coupling between the photovoltaic MPPT and the DC bus of the charging pile, reducing conversion losses and improving energy conversion efficiency. It also has the advantages of automatically cleaning dust and impurities on the surface of the photovoltaic panel to ensure output power. This invention solves the problems of low photovoltaic energy utilization, low charging efficiency, insufficient system efficiency, and the inability to automatically clean dust and impurities on the surface of the photovoltaic panel, which affect output power and reduce power generation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an energy storage DC charging pile with integrated photovoltaic MPPT, comprising a mounting base plate, on the top of which an energy storage battery box, a water storage tank, and a roof are respectively mounted by bolts; an MPPT control module and a charging pile module are respectively fixedly mounted on the top and front of the energy storage battery box; a photovoltaic power generation module is mounted on the top of the roof by bolts; an input interface module is mounted on the bottom of the photovoltaic power generation module by bolts; a drive mechanism is mounted on the top of the rear side of the photovoltaic power generation module; a rubber scraper is fixedly connected to the front of the drive mechanism; a spray pipe is fixedly mounted on the top of the drive mechanism; a water pump is mounted on the top of the water storage tank by bolts; the output end of the MPPT control module is electrically connected to a DC bus module; the input end of the DC bus module is bidirectionally electrically connected to a bidirectional DC / DC converter; and the output end of the DC bus module is electrically connected to an energy management unit.

[0007] Preferably, the driving mechanism includes a fixed housing, a drive motor is fixedly connected to the right side of the fixed housing, the output end of the drive motor passes through the fixed housing and is fixedly connected to a reciprocating screw, guide slide rods are fixedly connected to the top and bottom of the inner cavity of the fixed housing, mounting sliders are movably sleeved on the surfaces of the guide slide rods and the reciprocating screw, the front side of the mounting slider passes through the fixed housing and is fixedly connected to a rubber scraper, and the surface of the reciprocating screw is movably connected to the fixed housing through a bearing.

[0008] Preferably, the surface of the spray pipe is connected to a nozzle, the outlet pipe of the water pump is fixedly connected to the spray pipe, and the inlet pipe of the water pump extends into the inner cavity of the water storage tank.

[0009] Preferably, the output terminal of the photovoltaic power generation module is electrically connected to the input interface module, and the output terminal of the input interface module is electrically connected to the MPPT control module.

[0010] Preferably, the input terminal of the DC bus module is electrically connected to the grid power supply module, the input terminal of the energy storage battery box is bidirectionally electrically connected to the bidirectional DC / DC converter, and the output terminal of the energy management unit is electrically connected to the charging pile module.

[0011] Preferably, a photoelectric sensor is bolted to the right side of the top of the photovoltaic power generation module, and a water injection hopper is fixedly connected to the left side of the top of the water storage tank.

[0012] Preferably, a transparent plate is embedded in the rear side of the water storage tank, and a protective cover is bolted to the top of the water storage tank.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] Electrical energy is transmitted to the MPPT control module through the input interface module and supplies power to the DC bus module. Through the coordination of the energy management unit, it is delivered to the charging pile module for charging. It can track the maximum power point of photovoltaic in real time, improve energy conversion efficiency, and store excess energy in the energy storage battery box. When photovoltaic power is insufficient, the energy storage battery box provides supplementary power through a bidirectional DC / DC converter, reducing conversion losses and effectively improving energy utilization.

[0015] When the intensity of transmitted light on the surface of the photovoltaic power generation module is lower than a preset threshold, the water pump draws water from the storage tank into the spray pipe and sprays it onto the surface of the photovoltaic power generation module. The rotating reciprocating screw causes the rubber scraper to move left and right on the surface of the photovoltaic power generation module to scrape away the mixture of dust, impurities and water, thereby completing the cleaning of the surface of the photovoltaic power generation module. This can effectively ensure the output power and power generation of the photovoltaic power generation module. Attached Figure Description

[0016] Figure 1 This is an axonometric view of the structure of this utility model;

[0017] Figure 2 This is a rear axonometric view of the structure of this utility model;

[0018] Figure 3 This is a cross-sectional axonometric view of the fixing shell of this utility model;

[0019] Figure 4 This is a system schematic diagram of the present invention.

[0020] In the diagram: 1. Mounting base plate; 2. Canopy; 3. Photoelectric sensor; 4. MPPT control module; 5. Rubber scraper; 6. Photovoltaic power generation module; 7. Spray pipe; 8. Sprinkler head; 9. Drive mechanism; 10. Energy storage battery box; 11. Charging pile module; 12. Water pump; 13. Water storage tank; 14. Water injection hopper; 15. Drive motor; 16. Guide slide rod; 17. Reciprocating screw; 18. Fixed shell; 19. Input interface module; 20. Mounting slider; 21. DC bus module; 22. Bidirectional DC / DC converter; 23. Energy management unit; 24. Grid power supply module. Detailed Implementation

[0021] Please see Figures 1-4An integrated photovoltaic MPPT-based energy storage DC charging pile includes a mounting base plate 1. A storage battery box 10, a water tank 13, and a roof 2 are bolted to the top of the mounting base plate 1. The storage battery box 10 is a lithium battery / supercapacitor bank that stores surplus photovoltaic energy and provides power during low light conditions. An MPPT control module 4 and a charging pile module 11 are fixedly mounted on the top and front of the storage battery box 10, respectively. The MPPT control module 4 is a Buck (step-down) circuit including a power MOSFET, a freewheeling diode, and an LC filter. The control terminal of the Buck circuit is connected to a DSP controller, which adjusts the PWM duty cycle in real time using the incremental conductance method to ensure the photovoltaic output always operates at its maximum power point. A photovoltaic power generation module 6 is bolted to the top of the roof 2, and an input interface module 19 is bolted to the bottom of the photovoltaic power generation module 6. The top of the rear of the photovoltaic power generation module 6... The unit is equipped with a drive mechanism 9, a rubber scraper 5 is fixedly connected to the front of the drive mechanism 9, a spray pipe 7 is fixedly installed on the top of the drive mechanism 9, a water pump 12 is installed on the top of the water storage tank 13 by bolts, the output end of the MPPT control module 4 is electrically connected to a DC bus module 21, the input end of the DC bus module 21 is bidirectionally electrically connected to a bidirectional DC / DC converter 22, and the output end of the DC bus module 21 is electrically connected to an energy management unit 23. The energy management unit 23 includes a main control chip, a signal acquisition circuit and a communication interface, which monitors the photovoltaic output power, the energy storage battery SOC (state of charge) and the charging load demand in real time, and dynamically switches between photovoltaic direct supply, energy storage discharge or grid supplementation mode. If photovoltaic power generation > charging demand: excess energy is charged into the energy storage battery; if photovoltaic power generation < charging demand: the energy storage battery supplements the difference; if energy storage SOC < 20%: switch to grid power supply.

[0022] Please see Figure 3 The drive mechanism 9 includes a fixed housing 18. A drive motor 15 is fixedly connected to the right side of the fixed housing 18. The output end of the drive motor 15 passes through the fixed housing 18 and is fixedly connected to a reciprocating screw 17. Guide slide rods 16 are fixedly connected to the top and bottom of the inner cavity of the fixed housing 18. By setting the guide slide rods 16, the mounting slider 20 can be limited and guided to ensure that the rubber scraper 5 moves more smoothly left and right. The mounting slider 20 is movably sleeved on the surface of the guide slide rods 16 and the reciprocating screw 17. The front side of the mounting slider 20 passes through the fixed housing 18 and is fixedly connected to the rubber scraper 5. The surface of the reciprocating screw 17 is movably connected to the fixed housing 18 through a bearing.

[0023] Please see Figure 2 The surface of the spray pipe 7 is connected to the nozzle 8, the outlet pipe of the water pump 12 is fixedly connected to the spray pipe 7, and the inlet pipe of the water pump 12 extends into the inner cavity of the water storage tank 13.

[0024] Please see Figure 4The output terminal of the photovoltaic power generation module 6 is electrically connected to the input interface module 19, and the output terminal of the input interface module 19 is electrically connected to the MPPT control module 4.

[0025] Please see Figure 4 The input end of the DC bus module 21 is electrically connected to the grid power supply module 24. By setting the grid power supply module 24, it is possible to switch to grid power supply when energy storage is insufficient. The input end of the energy storage battery box 10 is bidirectionally electrically connected to the bidirectional DC / DC converter 22. The output end of the energy management unit 23 is electrically connected to the charging pile module 11. By setting the bidirectional DC / DC converter 22, charging and discharging control can be realized.

[0026] Please see Figure 1 and Figure 2 A photoelectric sensor 3 is bolted to the right side of the top of the photovoltaic power generation module 6, and a water inlet 14 is fixedly connected to the left side of the top of the water storage tank 13. By setting the water inlet 14, it is convenient to add water to the water storage tank 13.

[0027] Please see Figure 2 A transparent plate is embedded in the rear side of the water storage tank 13. By setting the transparent plate, the water level in the water storage tank 13 can be easily observed. A protective cover is installed on the top of the water storage tank 13 by bolts. By setting the protective cover, the water pump 12 can be protected from dust and water.

[0028] In operation, the photovoltaic power generation module 6 converts solar energy into electrical energy and transmits it to the MPPT control module 4 via the input interface module 19. The MPPT control module 4 then supplies power to the DC bus module 21, and finally, through the coordination of the energy management unit 23, the power is delivered to the charging pile module 11 for charging. The MPPT control module 4 can track the photovoltaic maximum power point in real time, improving energy conversion efficiency. Simultaneously, it stores excess energy in the energy storage battery box 10. When photovoltaic power is insufficient, the energy storage battery box 10 provides supplementary power through the bidirectional DC / DC converter 22. This reduces conversion losses and effectively improves energy utilization. The photoelectric sensor 3 and the peripheral microcontroller... The transmitted light intensity threshold is connected and preset. The intensity of the dust reflection signal on the surface of the photovoltaic power generation module 6 is detected by the operation of the transmitter and receiver of the photoelectric sensor 3. When the transmitted light intensity is lower than the preset threshold, the water pump 12 and the drive motor 15 are controlled to work. The water pump 12 pumps water from the water storage tank 13 into the spray pipe 7 and sprays it onto the surface of the photovoltaic power generation module 6 through the nozzle 8. The rotating reciprocating screw 17 causes the rubber scraper 5 installed on the front side of the mounting slider 20 to move left and right on the surface of the photovoltaic power generation module 6 to scrape off the mixture of dust, impurities and water, thereby completing the cleaning of the surface of the photovoltaic power generation module 6. This can effectively ensure the output power and power generation of the photovoltaic power generation module 6.

[0029] In summary, this integrated photovoltaic MPPT energy storage DC charging pile, through the coordinated use of the mounting base plate 1, photoelectric sensor 3, MPPT control module 4, rubber scraper 5, spray pipe 7, drive mechanism 9, energy storage battery box 10, charging pile module 11, water pump 12, DC bus module 21, bidirectional DC / DC converter 22, and energy management unit 23, solves the problems of low photovoltaic energy utilization, low charging efficiency, insufficient system efficiency, inability to automatically clean dust and impurities on the photovoltaic panel surface, and reduced output power and electricity generation.

Claims

1. An integrated photovoltaic MPPT energy storage type direct current charging pile, comprising a mounting base plate (1), characterized in that: The top of the mounting base plate (1) is bolted with an energy storage battery box (10), a water storage tank (13), and a roof (2). The top and front of the energy storage battery box (10) are respectively fixedly mounted with an MPPT control module (4) and a charging pile module (11). The top of the roof (2) is bolted with a photovoltaic power generation module (6). The bottom of the photovoltaic power generation module (6) is bolted with an input interface module (19). The top of the rear side of the photovoltaic power generation module (6) is mounted with a drive mechanism (9). A rubber scraper (5) is fixedly connected to the front side of the drive mechanism (9), a spray pipe (7) is fixedly installed on the top of the drive mechanism (9), a water pump (12) is installed on the top of the water storage tank (13) by bolts, a DC bus module (21) is electrically connected to the output end of the MPPT control module (4), a bidirectional DC / DC converter (22) is electrically connected to the input end of the DC bus module (21), and an energy management unit (23) is electrically connected to the output end of the DC bus module (21).

2. The integrated photovoltaic MPPT energy storage direct current charging pile according to claim 1, characterized in that: The drive mechanism (9) includes a fixed housing (18), a drive motor (15) is fixedly connected to the right side of the fixed housing (18), the output end of the drive motor (15) passes through the fixed housing (18) and is fixedly connected to a reciprocating screw (17), the top and bottom of the inner cavity of the fixed housing (18) are fixedly connected to guide slide rods (16), the surfaces of the guide slide rods (16) and the reciprocating screw (17) are movably fitted with mounting sliders (20), the front side of the mounting slider (20) passes through the fixed housing (18) and is fixedly connected to the rubber scraper (5), and the surface of the reciprocating screw (17) is movably connected to the fixed housing (18) through bearings. 3.The energy storage direct charging pile with integrated photovoltaic MPPT of claim 1, wherein: The surface of the spray pipe (7) is connected to the nozzle (8), the outlet pipe of the water pump (12) is fixedly connected to the spray pipe (7), and the inlet pipe of the water pump (12) extends into the inner cavity of the water storage tank (13).

4. The integrated photovoltaic MPPT energy storage direct current charging pile according to claim 1, characterized in that: The output end of the photovoltaic power generation module (6) is electrically connected to the input interface module (19), and the output end of the input interface module (19) is electrically connected to the MPPT control module (4).

5. The integrated photovoltaic MPPT energy storage direct current charging pile according to claim 1, characterized in that: The input end of the DC bus module (21) is electrically connected to the grid power supply module (24), the input end of the energy storage battery box (10) is bidirectionally electrically connected to the bidirectional DC / DC converter (22), and the output end of the energy management unit (23) is electrically connected to the charging pile module (11).

6. The integrated photovoltaic MPPT energy storage direct current charging pile according to claim 1, characterized in that: A photoelectric sensor (3) is bolted to the right side of the top of the photovoltaic power generation module (6), and a water injection hopper (14) is fixedly connected to the left side of the top of the water storage tank (13).

7. The integrated photovoltaic MPPT energy storage direct current charging pile according to claim 1, characterized in that: A transparent plate is embedded in the rear side of the water storage tank (13), and a protective cover is installed on the top of the water storage tank (13) by bolts.

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