Photovoltaic off-grid inverter capable of being connected with multiple groups of batteries

Abstract

The utility model belongs to the technical field of photovoltaic off-grid inverters, and particularly discloses a photovoltaic off-grid inverter capable of being connected with multiple groups of batteries, which comprises a detachable shell, a copper bar mechanism capable of being connected with the multiple groups of batteries is mounted in the shell, multiple groups of cables are connected onto the copper bar mechanism, an interface board is fixed at one end of the shell, and the interface board is connected with the multiple groups of cables. One ends of the plurality of groups of cables penetrate through the interface plate and extend to the outside of the shell, and a threading mechanism for clamping and limiting the cables is arranged on the interface plate; the copper bar mechanism is installed at the upper end of the shell, the display screen is installed at the upper end of the shell, the inverter mainboard is installed in the shell, and the copper bar mechanism and the display screen are both electrically connected with the inverter mainboard, so that the copper bar mechanism can be connected with a plurality of cables at the same time through cooperation of the copper bar mechanism and the threading mechanism; therefore, the photovoltaic off-grid inverter can be connected with a plurality of groups of batteries at the same time, and the universality of the photovoltaic off-grid inverter is improved.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic off-grid inverter technology, specifically a photovoltaic off-grid inverter that can connect to multiple battery banks. Background Technology

[0002] Terminal blocks are widely used in the battery terminal design of off-grid photovoltaic inverters. Terminal blocks achieve wire connection through mechanical crimping or bolt fastening. Compared with welding or plug-in methods, they have stronger vibration and shock resistance. In off-grid systems, the equipment may face complex environments. The stability of terminal blocks can effectively reduce the risk of poor contact and ensure long-term reliable operation of the system.

[0003] For example, patent application number 202123008073.X discloses a photovoltaic inverter AC terminal block, including a housing. L1, L2, and L3 terminals are horizontally arranged side-by-side on the housing, and an N-line terminal is located on the housing above the L2 terminal. The N-line terminal, along with the horizontal projections of the L2 and L3 terminals, forms an isosceles triangle. The purpose of this utility model is to provide a photovoltaic inverter AC terminal block with horizontally arranged L1, L2, and L3 terminals and an elevated N-line terminal, reducing its width; this allows for a smaller design when combined with a waterproof housing; and it reduces the cost of 4-pin terminals.

[0004] However, current photovoltaic inverters typically only allow one set of battery wires to be connected via the terminal block, which is not convenient for connecting multiple sets of batteries at the same time and has certain limitations. Therefore, we need to propose a photovoltaic off-grid inverter that can connect multiple sets of batteries to solve the above-mentioned problems, enabling it to connect two sets of batteries at the same time and improving the versatility of photovoltaic inverters. Utility Model Content

[0005] The purpose of this invention is to provide an off-grid photovoltaic inverter that can connect to multiple battery banks, enabling simultaneous connection of two battery banks, thereby improving the versatility of the photovoltaic inverter and solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a photovoltaic off-grid inverter capable of connecting multiple battery groups, comprising a detachable housing, wherein a copper strip mechanism capable of connecting multiple battery groups is installed inside the housing, multiple sets of cables are connected to the copper strip mechanism, an interface plate is fixed at one end of the housing, one end of the multiple sets of cables extends through the interface plate to the outside of the housing, and a wire threading mechanism for clamping and limiting the cables is provided on the interface plate;

[0007] The display screen is installed at the upper end of the housing, and the inverter motherboard is installed inside the housing. The copper strip mechanism and the display screen are both electrically connected to the inverter motherboard.

[0008] Preferably, the housing includes a base, a first top cover, and a second top cover. The first top cover and the second top cover are fixed to the upper end of the base by bolts. The display screen is located on the first top cover, and the interface board is located at one end of the second top cover.

[0009] Preferably, the copper strip mechanism includes two geometric pieces and a cover plate. The two geometric pieces are fixed side by side inside the base, and the upper surfaces of the two geometric pieces are connected by the cover plate.

[0010] Preferably, the geometric plate includes two connecting parts and a protrusion, the protrusion being located between the two connecting parts. One of the connecting parts is connected to the inverter main board, and the upper ends of the other connecting part and the protrusion are both equipped with studs. The cable is detachably mounted on the studs via a connecting mechanism.

[0011] Preferably, the connecting mechanism includes a connecting piece, one end of which is integrally formed with a collar for fitting and fixing to the end of the cable, and the other end of the connecting piece has a through hole, through which a threaded locking nut is threadedly connected to the stud.

[0012] Preferably, the threading mechanism includes an annular piece embedded in the interface plate, a fixing plate fixed to the inner side of the annular piece, an elliptical hole for two cables to pass through in the center of the fixing plate, and multiple slots communicating with the elliptical hole are equidistantly arranged around the fixing plate.

[0013] Preferably, the interface board is provided with a power switch and multiple external interfaces at both ends, and the multiple external interfaces are multiple network cable interfaces and multiple data transmission interfaces.

[0014] Preferably, the interface board is further provided with multiple threading components, each of which includes a ring, and multiple fan-shaped pieces are fixed at equal intervals inside the ring. After the multiple fan-shaped pieces are combined, a threading hole is formed at the center. The interface board is provided with multiple ventilation holes in a rectangular array.

[0015] Preferably, the other end of the base is fixed with two protrusions, and the protrusions are provided with mounting holes.

[0016] Preferably, ventilation plates are fixed on opposite sides of the base, and the ventilation plates have multiple elongated holes arranged in a rectangular array.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model, through the cooperation of the copper bar mechanism and the wire threading mechanism, enables the copper bar mechanism to connect multiple cables at the same time, thereby enabling the photovoltaic off-grid inverter to connect multiple sets of batteries at the same time, improving the versatility of the photovoltaic off-grid inverter.

[0019] 2. The present invention, through the setting of the cable threading mechanism, can clamp and limit the cable passing through the interface plate, providing a certain degree of protection for the cable and reducing the possibility of breakage at the connection between the cable and the copper strip mechanism due to bending and pulling. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a side view sectional structural diagram of the present invention;

[0022] Figure 3 This is a side view of the copper bar mechanism of this utility model;

[0023] Figure 4 This is a schematic diagram of the connection mechanism and the copper strip mechanism of this utility model when they are connected;

[0024] Figure 5 This is a schematic diagram of the internal structure of the base of this utility model;

[0025] Figure 6 This utility model Figure 5 Enlarged structural diagram at point A in the middle.

[0026] In the diagram: 1. First top cover; 2. Display screen; 3. Ventilation plate; 4. Interface plate; 5. Wiring mechanism; 51. Annular piece; 52. Fixing plate; 53. Oval hole; 54. Groove; 6. Cable; 61. Connecting piece; 62. Collar; 7. Power switch; 8. Ventilation hole; 9. External interface; 10. Wiring component; 11. Second top cover; 12. Copper strip mechanism; 121. Connecting part; 122. Cover plate; 123. Protrusion; 124. Folded edge; 13. Locking nut; 14. Base; 15. Support plate; 16. Protrusion. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-6This utility model provides a technical solution: a photovoltaic off-grid inverter capable of connecting multiple battery groups, including a detachable housing. Inside the housing is a copper strip mechanism 12 capable of connecting multiple battery groups. Multiple cables 6 are connected to the copper strip mechanism 12. An interface plate 4 is fixed to one end of the housing. One end of each cable 6 passes through the interface plate 4 and extends to the outside of the housing. A threading mechanism 5 is provided on the interface plate 4 for clamping and limiting the cables 6. The copper strip mechanism 12 can connect multiple cables 6 simultaneously, thus enabling the photovoltaic off-grid inverter to connect multiple battery groups simultaneously, improving the versatility of the photovoltaic off-grid inverter. The threading mechanism 5 clamps and limits the cables 6 passing through the interface plate 4, providing protection for the cables 6 and reducing the risk of breakage at the connection between the cables 6 and the copper strip mechanism 12 due to bending or pulling.

[0029] The display screen 2 is installed at the upper end of the housing, and the inverter motherboard is installed inside the housing. The copper strip mechanism 12 and the display screen 2 are both electrically connected to the inverter motherboard, so that the inverter's working parameters and operating data can be displayed on the display screen 2.

[0030] The housing includes a base 14, a first upper cover 1 and a second upper cover 11. The first upper cover 1 and the second upper cover 11 are fixed to the upper end of the base 14 by bolts. The display screen 2 is located on the first upper cover 1, and the interface board 4 is located at one end of the second upper cover 11, so that the first upper cover 1 and the second upper cover 11 are detachable, which facilitates the installation and maintenance of electrical components inside the housing.

[0031] The copper strip mechanism 12 includes two geometric plates and a cover plate 122. The two geometric plates are fixed side by side inside the base 14, and the upper surfaces of the two geometric plates are connected by the cover plate 122. The cover plate 122 increases the stability of the installation between the two geometric plates. The protrusions 123 of the geometric plates and the connecting part 121 form a step, so that two cables 6 can be fixed on one geometric plate at the same time, thereby enabling the copper strip mechanism 12 to connect multiple cables 6.

[0032] The geometric plate includes two connecting portions 121 and a protrusion 123. The protrusion 123 is located between the two connecting portions 121. One of the connecting portions 121 is connected to the inverter main board. The upper ends of the other connecting portion 121 and the protrusion 123 are both equipped with studs to facilitate fixing a cable 6 on the protrusion 123 and the other connecting portion 121. The cable 6 is detachably mounted on the stud through a connecting mechanism. One of the connecting portions 121 of the geometric plate has an integrally formed folded edge 124. The folded edge 124 has a round hole to facilitate connection with the inverter main board.

[0033] The connecting mechanism includes a connecting piece 61. One end of the connecting piece 61 is integrally formed with a collar 62 for fitting and fixing to the end of the cable 6. The other end of the connecting piece 61 has a through hole. The stud passes through the through hole and is threadedly connected to a locking nut 13, which facilitates the connection of the cable 6. When connecting the cable 6, the connecting piece 61 is fitted onto the stud, and then the locking nut 13 is threaded onto the stud. The clamping force between the locking nut 13 and the geometric piece is used to fix the connecting piece 61 onto the geometric piece.

[0034] The threading mechanism 5 includes an annular piece 51 embedded in the interface plate 4. A fixing plate 52 is fixed to the inner side of the annular piece 51. An elliptical hole 53 is opened in the center of the fixing plate 52 for two cables 6 to pass through. Multiple slots 54 are equally spaced around the fixing plate 52 and communicate with the elliptical hole 53. By utilizing the communication between the slots 54 and the elliptical hole 53, the fixing plate 52 forms multiple fan-shaped clamping pieces, which can be used to allow cables 6 of different diameters to pass through the elliptical hole 53. At the same time, the clamping pieces provide a certain clamping force to the cables 6, so that the cables 6 are fixed in position without being pulled by external forces.

[0035] The interface board 4 is provided with a power switch 7 and multiple external interfaces 9 at both ends. The multiple external interfaces 9 are multiple network cable interfaces and multiple data transmission interfaces, which facilitates connection with other devices through multiple external interfaces 9 and improves the convenience of data transmission.

[0036] The interface board 4 is also provided with a plurality of cable guides 10, each of which includes a ring. Multiple sector-shaped pieces are fixed at equal intervals inside the ring. After the multiple sector-shaped pieces are combined, a cable guide hole is formed at the center to facilitate the passage of other cables 6, so as to connect external devices with electrical components inside the housing. The interface board 4 is provided with a plurality of ventilation holes 8 in a rectangular array to improve the ventilation inside the housing and accelerate the heat dissipation efficiency inside the housing.

[0037] Two protrusions 16 are fixed at the other end of the base 14. The protrusions 16 are provided with mounting holes, which facilitate the installation of the base 14 to the required position, thereby improving the ease of inverter installation. A support plate 15 is also installed inside the base 14. The support plate 15 is located at the connection between the first upper cover 1 and the second upper cover 11. The support plate 15 divides the interior of the outer shell into two mounting cavities. One mounting cavity is used to install the inverter main board, and the other mounting cavity is used to install the copper strip mechanism 12.

[0038] Ventilation plates 3 are fixed on opposite sides of the base 14. Multiple elongated holes are provided on the ventilation plates 3, which are arranged in a rectangular array. The ventilation plates 3 form convection flow with the air inside the outer shell, which helps to accelerate the heat dissipation rate inside the outer shell.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-bank battery photovoltaic off-grid inverter comprising a detachable housing, characterized in that: The inside of the shell is provided with a copper strip mechanism (12) capable of connecting multiple groups of batteries, a plurality of cables (6) are connected to the copper strip mechanism (12), one end of the shell is fixedly provided with an interface plate (4), one end of the plurality of cables (6) extends to the outside of the shell through the interface plate (4), and the interface plate (4) is provided with a threading mechanism (5) for clamping and limiting the cables (6). A display screen (2) is mounted at the upper end of the shell, and an inverter mainboard is mounted in the shell, and the copper strip mechanism (12) and the display screen (2) are electrically connected with the inverter mainboard.

2. The multi-bank photovoltaic off-grid inverter according to claim 1, characterized in that: The shell comprises a base (14), a first upper cover (1) and a second upper cover (11), the first upper cover (1) and the second upper cover (11) are fixed on the upper end of the base (14) by bolts, the display screen (2) is located on the first upper cover (1), and the interface plate (4) is located at one end of the second upper cover (11).

3. The multi-string battery photovoltaic off-grid inverter of claim 2, wherein: The copper strip mechanism (12) comprises two hexagonal plates and a cover plate (122), the two hexagonal plates are fixed side by side in the inside of the base (14), and the upper surfaces of the two hexagonal plates are connected by the cover plate (122).

4. The multi-string battery photovoltaic off-grid inverter of claim 3, wherein: The hexagonal plate comprises two connecting portions (121) and a protruding portion (123), the protruding portion (123) is located between the two connecting portions (121), one of the connecting portions (121) is connected with the inverter mainboard, threaded studs are mounted at the upper ends of the other connecting portion (121) and the protruding portion (123), and the cables (6) are detachably mounted on the threaded studs through a connecting mechanism.

5. The multi-string battery photovoltaic off-grid inverter of claim 4, wherein: The connecting mechanism comprises a connecting sheet (61), one end of the connecting sheet (61) is integrally formed with a sleeve ring (62) for sleeving and fixing on the end of the cable (6), the other end of the connecting sheet (61) is provided with a through hole, and the threaded stud is threadedly connected with a wire locking nut (13) penetrating through the through hole.

6. The multi-string battery photovoltaic off-grid inverter of claim 5, wherein: The threading mechanism (5) comprises an annular sheet (51) embedded in the interface plate (4), a fixed plate (52) is fixed to the inner side of the annular sheet (51), an elliptical hole (53) penetrating through two cables (6) is formed in the center of the fixed plate (52), and a plurality of notches (54) in communication with the elliptical hole (53) are equidistantly arranged around the fixed plate (52).

7. The multi-string battery photovoltaic off-grid inverter of claim 6, wherein: Power switches (7) and a plurality of external interfaces (9) are arranged at two ends of the interface plate (4), respectively, and the plurality of external interfaces (9) are a plurality of network interfaces and a plurality of data transmission interfaces, respectively.

8. The multi-string battery photovoltaic off-grid inverter of claim 7, wherein: A plurality of threading pieces (10) are further arranged on the interface plate (4), each threading piece (10) comprises a circular ring, a plurality of sector plates are equidistantly fixed in the inside of the circular ring, a threading hole is formed at the center of the plurality of sector plates after combination, and a plurality of ventilation holes (8) are arranged in a rectangular array on the interface plate (4).

9. The multi-string battery photovoltaic off-grid inverter of claim 2, wherein: The other end of the base (14) is fixedly provided with two protrusions (16), and the protrusions (16) are provided with mounting holes.

10. The multi-string battery photovoltaic off-grid inverter of claim 2, wherein: Ventilation plates (3) are fixed to opposite sides of the base (14), a plurality of long holes are formed in the ventilation plates (3), and the plurality of long holes are arranged in a rectangular array.

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