Inverter structure of photovoltaic energy storage all-in-one machine

Abstract

The utility model discloses an inverter structure of a photovoltaic energy storage all-in-one machine. The inverter structure comprises an inverter, a connecting support assembly and an energy storage battery. The inverter comprises a front cover plate assembly, a main body machine frame assembly and a rear cover plate assembly. The front cover plate assembly comprises a front cover plate; an operable display screen is arranged on the front cover plate; the front cover plate is fixedly connected with the main body machine frame assembly through a riveting stud; the main machine frame assembly comprises a circuit board assembly; the circuit board assembly comprises a control circuit board, a radiator, a sheet metal shell, an external connector and a connecting wire harness. The inverter, the connecting support assembly and the energy storage battery are further fixed through side connecting pieces. According to the scheme, integrated connection of the inverter, the connecting support assembly and the energy storage battery can be achieved, the overall structure is stable, and good sealing performance is achieved.

Description

Technical Field

[0001] The utility model relates to an inverter structure of a photovoltaic energy storage integrated machine, belonging to the technical field of photovoltaic energy storage equipment. Background Art

[0002] With the rapid development of energy storage technology, energy storage systems are increasingly used in power systems, and the application demand for corresponding inverter systems is gradually increasing. Integrated products including inverter systems and energy storage systems are gradually emerging. In traditional power systems, inverters and energy storage batteries are two independent modules, which need to be installed separately, occupying a large space and being difficult to install, debug and wire on site. However, the new photovoltaic energy storage integrated machine integrates the inverter and the energy storage battery, optimizing the overall structural design and meeting the market demand for integration and miniaturization. Most of the integrated machines for photovoltaic energy storage on the market are composed of stacked high-voltage batteries. However, some users consider the safety of high-voltage batteries, and the voltage safety of low-voltage batteries still has some advantages compared with high-voltage batteries. In addition, in some countries and regions, there are some special requirements for the installation of high-voltage integrated machines, and the installation cost is relatively high. Therefore, the research on low-voltage integrated machines has practical application value and significance. Content of the Utility Model

[0003] Aiming at the problems existing in the above-mentioned prior art, the utility model provides an inverter structure of a photovoltaic energy storage integrated machine, thereby solving the above-mentioned technical problems.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is: an inverter structure of a photovoltaic energy storage integrated machine, including an inverter, a connection bracket assembly and an energy storage battery; the inverter includes a front cover plate assembly, a main frame assembly and a rear cover plate assembly; the front cover plate assembly includes a front cover plate; an operable display screen is arranged on the front cover plate; the front cover plate is fixedly connected with the main frame assembly through riveted studs;

[0005] The main frame assembly includes a circuit board assembly; the circuit board assembly includes a control circuit board, a radiator, a sheet metal shell, an external connector and a connection wire harness; the control circuit board is used to realize the inversion function of the inverter; a radiator is arranged at the bottom of the control circuit board to dissipate heat from the heat-generating components of the control circuit board; various connectors on the right side of the sheet metal shell are used to realize the connection of the inverter with external photovoltaic modules, electrical loads and the energy storage battery part; a flange edge is bent outwards around the front end face of the sheet metal shell, and a plurality of flange mounting holes are arranged on the flange edge; a plurality of mounting holes are arranged around the sheet metal shell for fixing connection with the rear cover plate assembly;

[0006] The rear cover assembly includes a rear cover; a flange edge is bent inward around the periphery of the side of the rear cover close to the main frame assembly; a plurality of rivet nuts fixing holes are provided on the flange edge; a cooling fan is installed at one side position of the rear cover.

[0007] A circular notch is provided at the bottom of the connection bracket assembly; a circular boss is provided at the top of the energy storage battery; the connection bracket assembly is quickly positioned through the circular notch and the circular boss; a screw mounting hole two is provided at the bottom of the connection bracket assembly; a fixed rivet nut is provided at the top of the energy storage battery; the connection bracket assembly is fixedly connected to the energy storage battery through mounting screws.

[0008] Furthermore, a plurality of rivet studs are provided at the inner side positions near the upper and lower ends of the front cover; a sealing strip is provided on the surface of the cover plate inside the rivet studs; the sealing strip is pressed against the flange edge of the main frame assembly, and the sealing effect is achieved through the extrusion deformation of the sealing strip.

[0009] Furthermore, the main frame assembly is fixedly connected by screws passing through the mounting holes of the main frame assembly and the rivet nut fixing holes two of the rear cover assembly.

[0010] Furthermore, an O-shaped silica gel gasket is provided under the washer of the screw.

[0011] Furthermore, two cooling fans are provided on the right side of the rear cover assembly. The cooling fans are fixed to the sheet metal housing of the rear cover assembly by screws. A mesh structure matching the fan air inlet is provided on the right side of the sheet metal housing. A mesh grid air outlet for air outlet is provided on the left side of the sheet metal housing. Air flows into the cavity of the rear cover assembly through the air inlet of the sheet metal housing by the cooling fans, passes through the cooling tooth gaps of the radiator of the main frame assembly, and then flows out through the air outlet of the sheet metal housing.

[0012] Furthermore, fixed handles are provided on both sides of the sheet metal housing; the fixed handles are fixed to both sides of the sheet metal housing by screws.

[0013] Furthermore, a side connection piece is further included; the side connection piece is a bent sheet metal structure, and three groups of mounting holes are provided thereon. The mounting hole near the uppermost end is fixedly connected to the rivet nut fixing hole one of the inverter main frame assembly through a mounting screw; the mounting hole near the middle position is fixedly connected to the rivet nut fixing hole three of the connection bracket assembly through a mounting screw; the mounting hole near the lower end is fixedly connected to the energy storage battery through a mounting screw and a connection.

[0014] The beneficial effects of the present utility model are:

[0015] (1)The fastening connection between the front cover plate and the main frame assembly is achieved by setting the riveting stud mechanism; the sealing performance between the front cover plate assembly and the main frame assembly is realized by compressing the sealing rubber strip; during the tightening process of the mounting nut, the sealing rubber strip is extruded against the flange edge of the main frame assembly, and the sealing effect is achieved through the extrusion deformation of the sealing rubber strip.

[0016] (2)Removable gripping handles are provided on both sides of the rear cover plate assembly, facilitating the user to carry it during installation; two cooling fans are provided on the right side of the rear cover plate assembly and are fixed to the sheet metal housing of the rear cover plate assembly by screws. A grille structure matching the fan air intake is provided on the right side of the sheet metal housing, and a mesh grille air outlet for air discharge is provided on the left side of the sheet metal housing. Air flows into the cavity of the rear cover plate assembly through the cooling fans from the air inlet of the sheet metal housing, passes through the heat dissipation tooth gaps of the radiator of the main frame assembly, and then flows out from the air outlet of the sheet metal housing, increasing the heat dissipation efficiency of the internal circuit board components of the main frame assembly and improving the overall heat dissipation performance of the product.

[0017] (3)An O-shaped silicone gasket is added under the installation screw washer to ensure the sealing performance of the installation holes of the main frame assembly.

[0018] (4)By setting the connection bracket assembly, the function body of the inverter and the connection and fixation with the energy storage battery are realized; by setting side connection pieces on both sides, the fixation of the inverter body, the connection bracket, and the energy storage battery is further strengthened. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of the photovoltaic energy storage integrated machine of the present utility model

[0020] Figure 2 is the exploded schematic diagram of the structural components related to the present utility model

[0021] Figure 3 is the structural schematic diagram of the front cover assembly of the inverter of the present utility model

[0022] Figure 4 is the structural schematic diagram of the main frame assembly of the inverter body of the present utility model

[0023] Figure 5 is the structural schematic diagram of the rear cover assembly of the inverter of the present utility model

[0024] Figure 6 is the assembly structural schematic diagram of the connection bracket assembly, side connection piece, and energy storage battery of the present utility model

[0025] Attached drawing reference numerals: 1. Inverter, 2. Connection bracket assembly, 3. Energy storage battery, 4. Front cover assembly, 5. Main body frame assembly, 6. Rear cover assembly, 7. Side connection piece, 8. Riveting stud, 9. Sealing strip, 10. Flange mounting hole, 11. First screw mounting hole, 12. First riveting nut fixing hole, 13. Circuit board assembly, 14. Second riveting nut fixing hole, 15. Fixed handle, 16. Cooling fan, 17. Second screw mounting hole, 18. Third riveting nut fixing hole, 19. Mounting screw. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the attached drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0027] Unless otherwise defined, all technical terms and scientific terms used herein have the same meanings as those commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0028] As Figures 1-6 shown, an inverter structure of a photovoltaic energy storage integrated machine includes an inverter 1, a connection bracket assembly 2, and an energy storage battery 3; the inverter 1 includes a front cover assembly 4, a main body frame assembly 5, and a rear cover assembly 6; the front cover assembly 4 includes a front cover 41; an operable display screen 42 is provided on the front cover 41; the front cover 41 is fixedly connected to the main body frame assembly 5 through a riveting stud 8;

[0029] The main body frame assembly 5 includes a circuit board assembly 13; the circuit board assembly 13 includes a control circuit board, a radiator, a sheet metal housing, an external connector, and a connection wire harness; the control circuit board is used to implement the inversion function of the inverter; a radiator is provided at the bottom of the control circuit board to dissipate heat from the heat generating components of the control circuit board; various connectors on the right side of the sheet metal housing are used to connect the inverter to external photovoltaic modules, electrical loads, and the energy storage battery part; a flange edge is bent outward around the front end face of the sheet metal housing, and a plurality of flange mounting holes 10 are provided on the flange edge; a plurality of first screw mounting holes 11 are provided around the sheet metal housing for fixing connection with the rear cover assembly 6;

[0030] The rear cover assembly 6 includes a rear cover; a flange edge is bent inward around the side of the rear cover close to the main body frame assembly 5; a plurality of riveting nut fixing holes 14 are provided on the flange edge; a cooling fan 16 is installed at one side position of the rear cover;

[0031] A circular notch is provided at the bottom of the connecting bracket assembly 2; a circular boss is provided at the top of the energy storage battery 3; the connecting bracket assembly 2 is quickly positioned through the circular notch and the circular boss; a screw mounting hole two 17 is provided at the bottom of the connecting bracket assembly 2; a fixed riveting nut is provided at the top of the energy storage battery 3; the connecting bracket assembly 2 is fixedly connected to the energy storage battery 3 through the mounting screw 19.

[0032] Preferably in this embodiment, a plurality of riveting studs 8 are provided at the inner side positions near the upper and lower ends of the front cover plate 41; a sealing strip 9 is provided on the cover plate surface inside the riveting studs 8; the sealing strip 9 is pressed against the flange edge of the main frame assembly 5, and the sealing effect is achieved through the extrusion deformation of the sealing strip 9.

[0033] Preferably in this embodiment, the main frame assembly 5 is fixedly connected by screws passing through the screw mounting hole one 11 of the main frame assembly 5 and fastening to the riveting nut fixing hole two 14 of the rear cover plate assembly 6.

[0034] Preferably in this embodiment, an O-shaped silica gel gasket is provided under the washer of the screw.

[0035] Preferably in this embodiment, two cooling fans 16 are provided on the right side of the rear cover plate assembly 6. The cooling fans 16 are fixed to the sheet metal housing of the rear cover plate assembly 6 by screws. A mesh structure matching the fan air intake is provided on the right side of the sheet metal housing, and a mesh grid air outlet for air outlet is provided on the left side of the sheet metal housing. Air flows into the cavity of the rear cover plate assembly through the air intake of the sheet metal housing by the cooling fans, passes through the heat dissipation tooth gaps of the radiator of the main frame assembly 5, and then flows out through the air outlet of the sheet metal housing.

[0036] Preferably in this embodiment, fixed handles 15 are provided on both sides of the sheet metal housing; the fixed handles 15 are fixed to both sides of the sheet metal housing by screws.

[0037] Preferably in this embodiment, a side connecting piece 7 is further included; the side connecting piece 7 is a bent sheet metal structure, and three groups of mounting holes are provided thereon. The mounting hole near the uppermost end is connected and fixed to the riveting nut fixing hole one 12 of the inverter main frame assembly 5 through the mounting screw 19; the mounting hole near the middle position is connected and fixed to the riveting nut fixing hole three 18 of the connecting bracket assembly 2 through the mounting screw 19; the mounting hole near the lower end is connected and fixed to the energy storage battery through the mounting screw 19.

[0038] Continue to refer to Figure 3 and Figure 4, the front cover assembly 4 is the panel part of the inverter 1. The middle part is the function operation and information display screen assembly of the inverter. The signal transmission connection between the rear end of the display screen assembly and the circuit board inside the main frame assembly 5 is realized through a wire harness connector. A number of riveting studs 8 are arranged at the upper and lower ends of the front cover assembly 4. A circumferential sealing strip 9 is arranged on the cover plate surface inside the riveting studs. When installing, the riveting studs 8 of the front cover assembly 4 pass through the flange fixing holes 10 on the outside of the main frame assembly 5 correspondingly, and then are fastened with installation nuts to realize the assembly of the front cover assembly 4 and the main frame assembly 5. At the same time, during the fastening process of the installation nuts, the sealing strip 9 is extruded against the flange edge of the main frame assembly 5, and the sealing effect is realized through the extrusion deformation of the sealing strip.

[0039] Continue to refer to Figure 4 , the main frame assembly 5 includes an internal control circuit board, a radiator, a sheet metal shell, external connectors, wire harnesses, etc. The control circuit board is used to realize the inversion function of the inverter. The radiator at the bottom of the control circuit board is used to dissipate heat from the heat-generating components of the control circuit board. Various connectors on the right side of the sheet metal are used to realize the connection between the inverter and external photovoltaic modules, electrical loads, energy storage batteries, etc. A number of screw mounting holes 11 are arranged around the bottom end of the sheet metal shell. The screw mounting holes 11 are used for the fixed connection with the rear cover assembly 6.

[0040] Continue to refer to Figure 5 , the rear cover assembly 6 includes a sheet metal shell, a cooling fan 16, a fixed handle 15, etc. There is a flange wall bent inward around the top of the sheet metal shell, and a number of riveting nuts 14 are arranged on it. When installing with the main frame assembly 5, the installation screws pass through the installation holes 11 of the main frame assembly 5 and are fastened with the riveting nuts 14 of the rear cover assembly. The threaded holes at the connection are sealed. O-shaped silicone gaskets can be added under the installation screw washers to ensure the sealing performance of the installation holes of the main frame assembly. Two cooling fans are arranged on the right side of the rear cover assembly 6 and are fixed to the sheet metal shell of the rear cover assembly 6 by screws. A mesh structure matching the fan air intake is arranged on the right side of the sheet metal shell. A mesh grid air outlet for air outlet is arranged on the left side of the sheet metal shell. Air flows into the cavity of the rear cover assembly through the air intake of the sheet metal shell by the cooling fan, passes through the heat dissipation tooth gaps of the radiator of the main frame assembly 5, and then flows out through the air outlet of the sheet metal shell, increasing the heat dissipation efficiency of the circuit board components inside the main frame assembly and improving the overall heat dissipation performance of the product. Fixed handles 15 are arranged on both sides of the sheet metal shell and are fixed to both sides of the sheet metal shell by screws, which is convenient for users to grab and fix during handling and installation.

[0041] Continue to refer to Figure 6, the connection bracket assembly 2 is quickly positioned through two circular notches at the bottom end with two circular bosses at the top of the energy storage battery 3, and then the mounting screws 19 are used to connect and fix with two riveted nuts at the top of the energy storage battery 3 through two mounting holes 17 at the bottom of the connection bracket assembly 2. Three groups of mounting holes are provided on the side connection piece 7, and the mounting screws 19 are used to connect and fix with the riveted nuts on the side of the energy storage battery, the connection bracket assembly, and the main frame assembly from bottom to top in sequence, realizing the integrated connection of the three parts of the inverter, the connection bracket assembly, and the energy storage battery.

[0042] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, or improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An inverter structure of a photovoltaic energy storage integrated machine, characterized in that: The inverter (1) comprises an inverter (1), a connecting bracket assembly (2) and an energy storage battery (3); the inverter (1) comprises a front cover assembly (4), a main frame assembly (5) and a rear cover assembly (6); the front cover assembly (4) comprises a front cover (41); an operable display screen (42) is provided on the front cover (41); the front cover (41) is fixedly connected to the main frame assembly (5) by means of riveting studs (8); The main frame assembly (5) includes a circuit board assembly (13); the circuit board assembly (13) includes a control circuit board, a heat sink, a sheet metal shell, an external connector and a connecting harness; the control circuit board is used to realize the inverter function of the inverter; a heat sink is provided at the bottom of the control circuit board for dissipating heat from the heating device of the control circuit board; the connector on the right side of the sheet metal shell is used to realize the connection between the inverter and the external photovoltaic component, the power load and the energy storage battery; the front end surface of the sheet metal shell is bent outwardly to form a flange edge, and the flange edge is provided with a plurality of flange mounting holes (10); the sheet metal shell is provided with a plurality of screw mounting holes (11) on the periphery thereof for fixed connection with the rear cover assembly (6); The rear cover assembly (6) comprises a rear cover; a flange edge is bent inwardly on one side of the rear cover close to the main frame assembly (5); a plurality of riveted nut fixing holes (14) are arranged on the flange edge; a cooling fan (16) is installed at one side of the rear cover; The bottom of the connecting bracket assembly (2) is provided with a circular recess; the top of the energy storage battery (3) is provided with a circular boss; the connecting bracket assembly (2) is quickly positioned by means of the circular recess and the circular boss; the bottom of the connecting bracket assembly (2) is provided with a second screw mounting hole (17); the top of the energy storage battery (3) is provided with a fixed riveted nut; the connecting bracket assembly (2) is fixedly connected to the energy storage battery (3) by means of mounting screws (19).

2. The inverter structure of a photovoltaic energy storage integrated machine according to claim 1, characterized in that: A plurality of riveted studs (8) are arranged at inner positions at the upper and lower ends of the front cover plate (41); a sealing strip (9) is arranged on the surface of the cover plate inside the riveted studs (8); the sealing strip (9) is pressed against the flange edge of the main machine frame assembly (5), and a sealing effect is achieved through the extrusion deformation of the sealing strip (9).

3. The inverter structure of a photovoltaic energy storage integrated machine according to claim 1, characterized in that: The main frame assembly (5) is screwed through a first screw mounting hole (11) of the main frame assembly (5) and is fastened to a second riveted nut fixing hole (14) of the rear cover assembly (6).

4. The inverter structure of a photovoltaic energy storage integrated machine according to claim 3, characterized in that: An O-shaped silicone gasket is arranged under the washer of the screw.

5. The inverter structure of a photovoltaic energy storage integrated machine according to claim 1, characterized in that: Two cooling fans (16) are arranged on the right side of the rear cover assembly (6); the cooling fans (16) are fixed to the sheet metal shell of the rear cover assembly (6) by screws; a mesh cover structure matching the fan air inlet is arranged on the right side of the sheet metal shell; a mesh grid air outlet for air outlet is arranged on the left side of the sheet metal shell; air flows into the cavity of the rear cover assembly through the cooling fan from the air inlet of the sheet metal shell, passes through the cooling tooth gap of the radiator of the main machine frame assembly (5), and then flows out from the air outlet of the sheet metal shell.

6. The inverter structure of a photovoltaic energy storage integrated machine according to claim 5, characterized in that: Fixed handles (15) are provided on both sides of the sheet metal shell; the fixed handles (15) are fixed to both sides of the sheet metal shell by means of screws.

7. The inverter structure of a photovoltaic energy storage integrated machine according to claim 1, characterized in that: It also includes a side connecting piece (7); the side connecting piece (7) is a bent sheet metal structure, and is provided with three groups of mounting holes, the mounting holes near the uppermost end are connected and fixed to the first rivet nut fixing hole (12) of the inverter main frame assembly (5) by means of mounting screws (19); the mounting holes near the middle section are connected and fixed to the third rivet nut fixing hole (18) of the connecting bracket assembly (2) by means of mounting screws (19); and the mounting holes near the lower end are connected and fixed to the energy storage battery by means of mounting screws (19).

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