Energy storage photovoltaic module

Abstract

The utility model provides an energy storage photovoltaic assembly, which belongs to the technical field of photovoltaic power generation and comprises a solar panel and an energy storage battery, and a controller and a junction box are arranged on the back of the solar panel. The junction box is connected with the controller through a circuit, and the controller is connected with a power grid through an inverter circuit; the frame surrounds the solar cell panel, and a mounting groove is formed in the inner side of the lower end of the frame; the energy storage battery is fixedly arranged in a mounting groove in the lower end of the frame; and the energy storage battery is connected with the controller through a connecting wire. According to the energy storage photovoltaic module provided by the utility model, the energy storage battery is integrated in the frame of the photovoltaic module by directly utilizing the mounting groove in the inner side of the frame, so that the energy storage photovoltaic module is convenient to mount, and the mounting cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaic power generation, and specifically relates to an energy storage photovoltaic component. Background Art

[0002] Existing photovoltaic modules are mainly composed of photovoltaic power generation units and junction boxes. The photovoltaic power generation unit receives sunlight and converts it into DC power, which is then output through the junction box terminals. The size of photovoltaic power fluctuates with the intensity of sunlight, and the power grid prefers to be able to connect the power grid with stable and smooth output. The fluctuation of photovoltaic power generation brings great pressure to the grid regulation.

[0003] With the increase in photovoltaic power generation capacity, the power grid has gradually paid attention to photovoltaic grid-connected technology. In some areas, it has been required to install control devices in new photovoltaic power generation projects, start the strategy of abandoning light, and stabilize the overall stability of the power grid. Although this strategy has achieved the expected purpose, it has greatly wasted green electricity resources and is not conducive to the realization of the country's dual carbon goals.

[0004] In order to reduce the waste of green electricity resources, currently, a separate energy storage device is generally installed outside the photovoltaic modules to store the excess power generated by photovoltaic power generation in the energy storage device, and then the power in the energy storage device is released at the appropriate time. However, the current energy storage devices are relatively complex and have high installation costs, and are not suitable for distributed photovoltaic power generation systems. Utility Model Content

[0005] The embodiment of the utility model provides an energy storage photovoltaic assembly, in which an energy storage battery is integrated on the photovoltaic assembly, so as to solve the problems of complex structure and high installation cost of an external energy storage device.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide an energy storage photovoltaic component, including:

[0007] A solar panel, with a controller and a junction box disposed on the back thereof; the junction box is connected to the controller via a line, and the controller is connected to the power grid via an inverter line;

[0008] A frame is arranged around the solar cell panel, and a mounting groove is arranged on the inner side of the lower end of the frame; and an energy storage battery is fixed in the mounting groove at the lower end of the frame; the energy storage battery is connected to the controller through a line.

[0009] In one achievable manner, the energy storage battery is mounted on two long frames opposite to the frame, and a buckle is provided on the bottom plate of the mounting groove away from the solar panel.

[0010] In one practicable manner, a latching protrusion capable of abutting against the energy storage battery is disposed on the inner side of the buckle.

[0011] In one achievable manner, a guiding inclined surface is provided at the inner upper end of the clamping protrusion.

[0012] In one achievable manner, a fixing structure for preventing the energy storage battery from slipping is provided on the two long frames.

[0013] In one achievable manner, the fixing structure includes a clamping plate and fastening bolts penetrating the long frame, the bolts fix the clamping plate to the inner side of the long frame, and the clamping plate is located above the energy storage battery.

[0014] In one achievable manner, the clamping plate is an integrally formed bending structure having a fixing plate attached to the inner side of the long frame and a limiting plate located above the energy storage battery.

[0015] In a feasible manner, the clamping plate further comprises a downwardly bent anti-slip plate, the anti-slip plate is located at one end of the limiting plate away from the fixing plate, and the anti-slip plate is parallel to the fixing plate.

[0016] In a feasible manner, the clamping plate further comprises a reinforcing plate which fits the clamping plate on the inner side of the long frame, and the reinforcing plate is parallel to the limiting plate.

[0017] In a feasible manner, the clamping plate further has an upwardly bent flange, the flange is located at an end of the reinforcing plate away from the fixing plate, and the flange is closely attached to the side surface of the clamping plate.

[0018] Compared with the prior art, the energy storage photovoltaic assembly provided by the utility model has the beneficial effect of directly integrating the energy storage battery into the frame of the photovoltaic assembly by using the installation groove on the inner side of the frame, which facilitates installation and reduces installation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the back structure of an energy storage photovoltaic module provided by an embodiment of the utility model;

[0020] Figure 2 For along Figure 1 The cross-sectional structure diagram along the AA line;

[0021] Figure 3 For along Figure 1 The cross-sectional structure diagram of the middle BB line;

[0022] Figure 4 A schematic diagram of the structure of a clamping plate of a fixed structure provided in an embodiment of the utility model;

[0023] Figure 5 A schematic diagram of a grid-connected circuit for an energy storage photovoltaic assembly provided by an embodiment of the utility model;

[0024] Figure 6 A power output curve diagram of the energy storage photovoltaic assembly provided in the embodiment of the utility model;

[0025] Description of reference numerals:

[0026] 1. Energy storage battery; 2. Solar panel; 201. Front glass cover; 202. Front EVA film; 203. Battery cell; 204. Back EVA film; 205. Back glass; 3. Frame; 301. Mounting slot; 4. Controller; 5. Junction box; 6. Connecting wire; 7. Photovoltaic output positive pole; 8. Controller input; 9. Controller output; 10. Clamping plate; 101. Fixing plate; 102. Limiting plate; 103. Anti-slip plate; 104. Reinforcement plate; 105. Flanging; 11. Fastening bolts; 12. Photovoltaic output negative pole; 13. Buckle; 131. Boss; 14. Inverter. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] Please also read Figures 1 to 3 The energy storage photovoltaic assembly provided by the utility model is now described. The energy storage photovoltaic assembly includes a solar panel 2 and an energy storage battery 1. A controller 4 and a junction box 5 are arranged on the back of the solar panel 2; the junction box 5 is connected to the controller 4 through a line, and the controller 4 is connected to the power grid through an inverter line; a frame 3 is arranged around the solar panel 2, and a mounting groove 301 is arranged on the inner side of the lower end of the frame 3; the energy storage battery 1 is fixed in the mounting groove 301 at the lower end of the frame 3; the energy storage battery 1 is connected to the controller 4 through a connecting line 6.

[0029] Compared with the prior art, the energy storage photovoltaic assembly provided by the utility model has the beneficial effect of directly integrating the energy storage battery 1 into the frame 3 of the photovoltaic assembly by using the installation groove 301 on the inner side of the frame 3, which is convenient for installation and reduces the installation cost.

[0030] The back of the photovoltaic module is connected to the controller 4, and the controller 4 is connected to the energy storage battery 1. The power generated by the photovoltaic module is output to the outside through the controller 4, and part of the power is stored in the energy storage battery 1. The controller 4 stores the power generated by the photovoltaic peak in the energy storage battery 1. When the solar energy is insufficient, the controller 4 slowly releases the power stored in the energy storage battery 1 to achieve the purpose of smoothing the photovoltaic output curve, extending the photovoltaic output time, and reducing the impact of photovoltaic power generation on the power grid.

[0031] The energy storage photovoltaic module provided by the utility model is an integrated energy storage and power generation module, which has the ability to store peak power generation and release it when the power generation power is low, forming a smooth power generation curve of the photovoltaic module, reducing the impact of photovoltaic green electricity on the power grid (such as Figure 6 The photovoltaic power output curve shown in the figure is conducive to the promotion of household distributed photovoltaic projects.

[0032] The solar panel 2 provided in the present application is divided into a front glass cover plate 201, a front EVA film 202, a battery cell 203, a back EVA film 204, and a back glass 205 from bottom to top. It is surrounded and protected by an aluminum alloy frame 3 on all sides. An energy storage battery 1 is embedded inside the long frame of the aluminum alloy frame 3. The positive and negative polarities of the solar panel 2 are connected to the junction box 5. After the junction box 5 draws out the power, it is connected to the charge and discharge controller 4. The controller 4 is simultaneously connected to the energy storage battery 1 and connected to the power grid through the inverter line. The controller 4 contains the charge and discharge control circuit of the energy storage battery 1, and the photovoltaic charging time and discharge time can be customized to control the photovoltaic peak power to be stored in the energy storage battery 1, and release the power when the photovoltaic output is insufficient.

[0033] The solar panel 2 provided in the present application can well match the double-sided power generation characteristics, and the energy storage battery 1 is hidden inside the frame 3 without blocking the back of the battery cell 203.

[0034] The energy storage process of the energy storage photovoltaic assembly provided by the utility model is as follows: the photovoltaic assembly receives sunlight and starts to generate electricity. In the morning, as the intensity of sunlight radiation gradually increases, when the photovoltaic assembly reaches a preset peak power generation power, the controller 4 starts to work, and the power generation exceeding the preset power is stored in the energy storage battery 1, so as to avoid the impact of high photovoltaic power generation on the power grid; in the afternoon, as the intensity of sunlight radiation gradually decreases, when the power generation power of the photovoltaic assembly is reduced to a preset low-peak power generation power, the controller 4 controls the energy storage battery 1 to start discharging, supplements the photovoltaic power output, and enhances the stability of the power grid.

[0035] The components of the present invention can adjust the charging and discharging time as needed, and can be used in application scenarios such as photovoltaic peak shifting and valley filling, improving the self-use rate of photovoltaic power generation, and avoiding the back-feeding of photovoltaic power generation to the power grid.

[0036] Figure 5 The schematic diagram of the energy storage circuit of the energy storage photovoltaic assembly is shown in FIG. 5 . The junction box 5 has a photovoltaic output positive electrode 7 and a photovoltaic output negative electrode 12 , which are respectively connected to the controller input 8 of the controller 4 , and the controller output 9 is connected to the power grid through the inverter 14 .

[0037] Energy storage battery: Lithium battery, lithium-ion battery is a secondary battery (rechargeable battery), which mainly relies on the movement of lithium ions between the positive electrode and the negative electrode to work. During the charging and discharging process, Li+ is embedded and de-embedded between the two electrodes: when charging, Li+ is de-embedded from the positive electrode and embedded in the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge.

[0038] In some embodiments, Figures 1 to 3 As shown, the energy storage battery 1 is installed on two long frames opposite to the frame 3, and a buckle 13 is provided on the bottom plate of the mounting groove 301 away from the solar panel 2. The aluminum alloy frame 3 on the short side of the assembly forms a blockage at both ends of the long side, which can effectively prevent the energy storage battery 1 from sliding off; after the photovoltaic assembly is installed at an angle, the photovoltaic assembly is tilted as a whole, and the energy storage battery 1 will be tilted at the same angle accordingly. The buckle 13 on the bottom plate of the long frame can prevent the tilted energy storage battery 1 from falling off from the mounting groove 301.

[0039] In some embodiments, Figure 2 As shown, a latching protrusion 131 is disposed on the inner side of the buckle 13 and can abut against the energy storage battery 1 , thereby pressing the energy storage battery 1 .

[0040] In some embodiments, Figure 2 As shown, a guiding slope is provided at the inner upper end of the locking protrusion 131 to facilitate the energy storage battery 1 to be placed in the installation groove 301 .

[0041] In some embodiments, Figure 1-Figure 3 As shown, the two long frames are provided with a fixing structure for preventing the energy storage battery 1 from slipping off. After the energy storage battery 1 is placed inside the frame 3, the energy storage battery 1 buckle 13 provided on the frame 3 pre-fixes the energy storage battery 1, and then the fixing structure is used to limit the upper surface of the energy storage battery 1. The energy storage battery 1 is restrained by the fixing structure, the aluminum frame 3 and the buckle 13, avoiding the risk of the energy storage battery 1 slipping out when the photovoltaic module is tilted.

[0042] At least two fixing structures can be arranged at intervals along one side of the long frame to enhance the fixing effect of the battery. An energy storage battery 1 is arranged in one side of the long frame, and the length of the energy storage battery 1 can be consistent with the length of the long frame or slightly smaller than the length of the long frame.

[0043] In some embodiments, Figure 2 and Figure 4As shown, the fixing structure includes a clamping plate 10 and a fastening bolt 11 that passes through the long frame. The bolts fix the clamping plate 10 to the inner side of the long frame. The clamping plate 10 is located above the energy storage battery 1. Specifically, the energy storage battery 1 is a long flat strip. The long frame bears the weight of the energy storage battery 1 and limits the bottom and one side of the energy storage battery 1. When the energy storage battery 1 is tilted, the buckle 13 limits the other side of the energy storage battery 1 to prevent the energy storage battery 1 from sliding down due to its own weight. The clamping plate 10 is limited on the top of the energy storage battery 1. The short sides of the frame 3 limit the two ends of the energy storage battery 1. In this way, the six sides of the energy storage battery 1 are limited, which greatly improves the fixing effect of the energy storage battery 1.

[0044] The clamping plate 10 is fixed to the inner side of the long frame by fastening bolts 11 and nuts, and the operation is simple and convenient.

[0045] The pressing plate 10 does not have to be in close contact with the energy storage battery 1 , that is, a certain gap can be reserved between the pressing plate 10 and the energy storage battery 1 so that the energy storage battery 1 has a good heat dissipation effect.

[0046] In some embodiments, Figure 2 and Figure 4 As shown, the clamping plate 10 is an integrally formed bending structure, having a fixing plate 101 that fits the inner side of the long frame and a limiting plate 102 located above the energy storage battery 1. Specifically, the fixing plate 101 is used to realize the fixed connection between the clamping plate 10 and the long frame, and a certain heat dissipation gap is reserved between the limiting plate 102 and the energy storage battery 1.

[0047] In some embodiments, Figure 2 and Figure 4 As shown, the pressing plate 10 also has a downwardly bent anti-slip plate 103, which is located at one end of the limiting plate 102 away from the fixing plate 101, and the anti-slip plate 103 is parallel to the fixing plate 101. In order to facilitate the energy storage battery 1 to be placed in the installation groove 301, the height of the buckle 13 should not be too high. Therefore, when the photovoltaic component is installed at an angle, the buckle 13 is subjected to the continuous gravity of the energy storage battery 1, which will cause deformation and tilt outward, causing the risk of the energy storage battery 1 falling off. Therefore, by limiting the energy storage battery 1 with the anti-slip plate 103 on the fixed structure, the anti-slip plate 103 can bear part of the gravity extrusion of the energy storage battery 1. Therefore, after the energy storage battery 1 is installed at an angle, the anti-slip plate 103 and the buckle 13 together stop the energy storage battery 1 from sliding down, ensuring the reliability of the fixation of the photovoltaic component or the energy storage battery 1 during the effective period of use.

[0048] In some embodiments, Figure 2 and Figure 4As shown, the pressing plate 10 also has a reinforcing plate 104 that fits the clamping plate inside the long frame, and the reinforcing plate 104 is parallel to the limiting plate 102. The reinforcing plate 104 can improve the structural strength of the fixing structure, thereby improving the reliability of fixing the energy storage battery 1.

[0049] In some embodiments, Figure 2 and Figure 4 As shown, the clamping plate 10 also has an upwardly bent flange 105, which is located at one end of the reinforcing plate 104 away from the fixing plate 101, and the flange 105 is close to the side of the clamping plate. The flange 105 at one end of the fixing plate 101 is hooked tightly to the clamping plate, thereby improving the fit between the reinforcing plate 104 and the clamping plate, ensuring the effectiveness of the reinforcing effect of the reinforcing plate 104, and further improving the reliability of the overall fixing effect of the fixing structure.

[0050] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy storage photovoltaic assembly, characterized in that: include: A solar panel (2) is provided with a controller (4) and a junction box (5) on its back; the junction box (5) is connected to the controller (4) via a line, and the controller (4) is connected to a power grid via an inverter line; A frame (3) is arranged around the solar cell panel (2), and a mounting groove (301) is arranged on the inner side of the lower end of the frame (3); and The energy storage battery (1) is fixedly mounted in the mounting groove (301) at the lower end of the frame (3); the energy storage battery (1) is connected to the controller (4) via a line.

2. The energy storage photovoltaic assembly according to claim 1, characterized in that: The energy storage battery (1) is mounted on two opposite long frames of the frame (3), and a buckle (13) is provided on the bottom plate of the mounting groove (301) away from the solar cell panel (2).

3. The energy storage photovoltaic assembly according to claim 2, characterized in that: The inner side of the buckle (13) is provided with a clamping protrusion (131) capable of abutting against the energy storage battery (1).

4. The energy storage photovoltaic assembly according to claim 3, characterized in that: A guiding inclined surface is arranged on the inner upper end of the clamping protrusion (131).

5. The energy storage photovoltaic assembly according to any one of claims 2 to 4, characterized in that: The two long frames are provided with a fixing structure for preventing the energy storage battery (1) from slipping off.

6. The energy storage photovoltaic assembly according to claim 5, characterized in that: The fixing structure comprises a clamping plate (10) and fastening bolts (11) penetrating the long frame, wherein the bolts fix the clamping plate (10) to the inner side of the long frame, and the clamping plate (10) is located above the energy storage battery (1).

7. The energy storage photovoltaic assembly according to claim 6, characterized in that: The pressing plate (10) is an integrally formed bending structure, comprising a fixing plate (101) fitted to the inner side of the long frame and a limiting plate (102) located above the energy storage battery (1).

8. The energy storage photovoltaic assembly according to claim 7, characterized in that: The clamping plate (10) further comprises a downwardly bent anti-slip plate (103), wherein the anti-slip plate (103) is located at one end of the limiting plate (102) away from the fixing plate (101), and the anti-slip plate (103) is parallel to the fixing plate (101).

9. The energy storage photovoltaic assembly according to claim 8, characterized in that: The clamping plate (10) also has a reinforcing plate (104) that fits the clamping plate on the inner side of the long frame, and the reinforcing plate (104) is parallel to the limiting plate (102).

10. The energy storage photovoltaic assembly according to claim 9, characterized in that: The clamping plate (10) also has an upwardly bent flange (105), the flange (105) being located at an end of the reinforcing plate (104) away from the fixing plate (101), and the flange (105) being in close contact with the side surface of the clamping plate.

Images