CN216490391U

CN216490391U - Photovoltaic intelligent turn-off device

Info

Publication number: CN216490391U
Application number: CN202122935734.7U
Authority: CN
Inventors: 丁而立; 刘逸飞
Original assignee: Jiangsu Hollyson Electronic Technology Co ltd
Current assignee: Jiangsu Hollyson Electronic Technology Co ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-05-10
Anticipated expiration: 2031-11-26

Abstract

The utility model discloses a photovoltaic intelligent turn-off device which comprises a shell, a bottom plate, a control circuit board and a cable, wherein the shell is a cover plate provided with a cavity, the shape of the bottom plate is matched with that of the opening of the cavity and is clamped and fixed at the opening of the cavity, and the main body of the shell is rectangular. One side of the shell is provided with a positive input port and a negative input port, and the other side of the shell is provided with a positive output port and a negative output port. The control circuit board is provided with an anode input connection part, a cathode input connection part, an anode output connection part and a cathode output connection part, a groove which traverses the end face of the shell is arranged on the end face of the shell opposite to the bottom plate, and two rows of radiating fins which traverse the end face of the shell and are vertical to the end face of the shell are arranged on two sides of the groove. The photovoltaic intelligent turn-off device has high stability, good sealing performance and automatic turn-off, and can avoid faults in time.

Description

Photovoltaic intelligent turn-off device

Technical Field

The utility model relates to a photovoltaic intelligent turn-off device, and belongs to the field of photovoltaic manufacturing.

Background

With the development of a photovoltaic power generation system, the requirements on the safety and the reliability of a photovoltaic module are higher and higher, and the photovoltaic module junction box with the turn-off function can turn off the photovoltaic module in abnormal environments such as fire disasters and natural disasters, so that the safety and the reliability of the distributed power generation system are improved. The photovoltaic module junction box with the turn-off function has no clear design standard, and communication technical means between the photovoltaic module junction box and control equipment such as a gateway background and the like provided by different suppliers are different.

Chinese patent document CN112422078A (application number: 202011303031.6) discloses a junction box and a connector with a high-temperature automatic turn-off function for a photovoltaic module, which automatically turn off or automatically turn on a photovoltaic junction box or a photovoltaic connector for electrical connection through a control switch by measuring the temperature in the photovoltaic junction box and the temperature of the connected connector of the photovoltaic module in real time, comparing the temperature with a set temperature threshold value and controlling the switch; two temperature thresholds of a turn-off temperature and a reset temperature are set in the device; when the real-time measured temperature reaches a turn-off temperature threshold value, the control switch automatically turns off the electrical connection; when the real-time measured temperature value reaches the reset temperature threshold value, the control switch automatically restores the electrical connection; the device in the junction box and the device in the connector are two sets of devices which work independently; after the control switch automatically turns off the electrical connection, a continuous heating source caused by direct current arc in the photovoltaic module or increased contact resistance between metal pieces or high temperature generated by exceeding rated current in a circuit is eliminated, and the junction box or the connector is actively prevented from being burnt due to high temperature and overload current. This photovoltaic terminal box passes through the temperature measurement contrast and realizes the control shutoff automatically, but every terminal box all sets up the temperature measurement and shuts down the cost higher.

Chinese patent document CN110417348A (application number: 201810402227.7) discloses a solar module junction box, a solar system, and a solar module control method, wherein the solar module junction box includes: the device comprises a state detection module, a controller and a power supply module; the state detection module is connected with the controller, and the controller is connected with the power supply module; the state detection module detects the state of the solar assembly and sends state detection data to the controller, the controller acquires the state detection data, generates a turn-off control signal when the state detection data are abnormal and sends the turn-off control signal to the power supply module, and the power supply module adjusts the output voltage to be within a preset low voltage range after receiving the turn-off control signal. The product can realize the safe turn-off of the photovoltaic module and ensure the safety of personnel.

The main structure of the photovoltaic turn-off device is a box body and a circuit board, and the requirements on the sealing property and the stability are high due to the poor working environment, so that the structure of the box body needs to be designed for a use scene.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a photovoltaic intelligent turn-off device which has high stability, good sealing performance, automatic turn-off and can avoid faults in time.

The utility model provides a technical scheme for solving the technical problems: the utility model provides a photovoltaic intelligence turn-off device, includes casing, bottom plate, control circuit board and cable, the casing is the apron of seting up the cavity, the opening part at the cavity is fixed to the shape of bottom plate and the opening part shape phase-match and the joint of cavity, the casing main part is the rectangle.

One side of the shell is provided with an anode input port and a cathode input port, and the other side of the shell is provided with an anode output port and a cathode output port.

The positive input port and the positive output port are symmetrically arranged relative to the shell and are opposite in direction, and the negative input port and the negative output port are symmetrically arranged relative to the shell and are opposite in direction.

The control circuit board is located in the cavity, the control circuit board is fixed on the bottom plate, be equipped with on the control circuit board and be close to anodal input junction of anodal input port, be close to negative input junction of negative input port, be close to anodal output junction of anodal output port and be close to negative output port's negative output junction, anodal input junction connects a cable and passes anodal input port and stretches out the casing, negative input junction connects a cable and passes negative input port and stretches out the casing, anodal output junction connects a cable and passes anodal output port and stretches out the casing, negative output junction connects a cable and passes negative output port and stretches out the casing.

In order to increase the heat dissipation and the sealing performance and stability of the photovoltaic intelligent turn-off device, the cavity is closed and filled with silica gel.

In order to more fully radiate heat, a groove which traverses the end face of the shell is arranged on the end face of the shell opposite to the bottom plate, and two rows of radiating fins which traverse the end face of the shell and are perpendicular to the end face of the shell are arranged on two sides of the groove.

The direction of the groove is perpendicular to the direction of the cable, and the height of the radiating fins arranged on the end face of the shell is larger than that of the edge of the shell.

The end parts of the cables are respectively and fixedly connected with the corresponding positive electrode input connection part, the negative electrode input connection part, the positive electrode output connection part and the negative electrode output connection part through screws.

The upper half parts of the positive input port, the negative input port, the positive output port and the negative output port are both in a semi-arc shape, and the lower half parts are both in a trapezoid shape.

The photovoltaic intelligent turn-off device also comprises a line card; the lower half parts of the positive input port, the negative input port, the positive output port and the negative output port are provided with wire clamp grooves matched with the wire clamps, and the wire clamps are fixedly connected in the wire clamp grooves through ultrasonic welding to limit the cables.

One side of bottom plate is equipped with a plurality of trips, the bottom of casing be equipped with trip joint complex trip groove, the opposite side that the bottom plate is relative is equipped with the draw-in groove, the bottom of casing be equipped with draw-in groove joint complex boss.

The distance between the positive input port and the negative input port is larger than the distance between the positive output port and the negative output port.

For simple to operate, be equipped with the extension board between anodal input port and the negative pole input port, extension board and casing integrated into one piece are equipped with the mounting hole on the extension board.

The utility model has the positive effects that:

(1) according to the photovoltaic intelligent turn-off device, the positive input port and the negative input port are arranged on one side of the shell, the positive output port and the negative output port are arranged on the other side of the shell, space is fully utilized, real-time monitoring of a plurality of cable lines is achieved through the control circuit board arranged in the shell, and measures are timely taken for emergency situations of over-temperature and over-voltage, so that the safety of the junction box is guaranteed, and system damage caused by over-high temperature or abnormal voltage is avoided.

(2) The shell of the intelligent photovoltaic turn-off device is the cover plate with the cavity, the cavity is filled with silica gel after installation, and meanwhile, the end face of the shell, which is opposite to the bottom plate, is arranged, so that the heat dissipation performance of the intelligent photovoltaic turn-off device is improved, the sealing performance and the stability of the intelligent photovoltaic turn-off device are ensured, and the service life of the intelligent photovoltaic turn-off device is prolonged.

(3) The mounting hole is formed in the extension plate of the photovoltaic intelligent turn-off device, so that the photovoltaic intelligent turn-off device is convenient to mount and fix, the traditional bonding fixation is not needed, and the photovoltaic intelligent turn-off device is prevented from falling off due to long-time oxidation.

Drawings

The photovoltaic intelligent turn-off device of the present invention is further described with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a photovoltaic intelligent shutdown device according to this embodiment;

fig. 2 is a schematic back structure diagram of the photovoltaic intelligent shutdown device of the present embodiment;

fig. 3 is a schematic diagram of a control circuit board structure of the photovoltaic intelligent shutdown device of the present embodiment.

The above reference numerals are as follows:

the cable comprises a shell 1, a positive input port 12, a negative input port 13, a positive output port 14, a negative output port 15, a groove 16, a radiating fin 17, a wire clamping groove 18, an extension plate 19, a mounting hole 191, a bottom plate 2, a clamping hook 21, a clamping groove 22, a control circuit board 4, a positive input connection 41, a negative input connection 42, a positive output connection 43, a negative output connection 44, a cable 5 and a wire clamp 6.

Detailed Description

Examples

See fig. 1 to 3, the photovoltaic intelligent turn-off device of this embodiment, including casing 1, bottom plate 2, control circuit board 4 and cable 5, casing 1 is for seting up the apron of cavity, and the shape of bottom plate 2 matches and the joint is fixed at the opening part of cavity with the opening part shape of cavity, and one side of casing 1 is equipped with anodal input port 12 and negative pole input port 13, and the opposite side of casing 1 is equipped with anodal output port 14 and negative pole output port 15.

The control circuit board 4 is located in the cavity and fixed on the bottom plate 2, the control circuit board 4 is located in the cavity of the shell 1, and in order to increase the heat dissipation and the sealing performance and stability of the photovoltaic intelligent turn-off device, the cavity is filled with silica gel.

The control circuit board 4 is provided with a positive input connection 41 close to the positive input port 12, the control circuit board 4 is provided with a negative input connection 42 close to the negative input port 13, the control circuit board 4 is provided with a positive output connection 43 close to the positive output port 14, and the control circuit board 4 is further provided with a negative output connection 44 close to the negative output port 15.

The control circuit board 4 is provided with a temperature monitoring chip and a voltage detection chip, and when the temperature or the voltage is too high to reach a preset peak value of the temperature monitoring chip or the voltage detection chip, the temperature monitoring chip or the voltage detection chip can automatically generate an electric signal to send a turn-off instruction so as to protect the circuit.

A positive input junction 41 is connected with a cable 5, the cable 5 penetrates through a positive input port 12 to extend out of the shell to be connected with the connector, the cable is connected with the photovoltaic intelligent junction box assembly in series through the connector, a negative input junction 42 is connected with the cable 5, the cable 5 penetrates through a negative input port 13 to extend out of the shell 1 to be connected with the connector, the cable is connected with the photovoltaic intelligent junction box assembly in series through the connector, a positive output junction 43 is connected with a cable 5, the cable penetrates through a positive output port 14 to extend out of the shell 1 to be connected with the connector, the cable is connected with the photovoltaic intelligent junction box assembly in series through the connector, and a negative output junction 44 is connected with a cable 5, the cable penetrates through a negative output port 15 to extend out of the shell 1 to be connected with the connector, and the cable is connected with the photovoltaic intelligent junction box assembly in series through the connector.

For more reasonable and convenient design, the main body of the shell 1 is designed into a rectangular shape, the positive input port 12 and the positive output port 14 are symmetrically arranged relative to the shell 1 and are opposite in orientation, and the negative input port 13 and the negative output port 15 are symmetrically arranged relative to the shell 1 and are opposite in orientation. The distance between the positive input port 12 and the negative input port 13 is larger than the distance between the positive output port 14 and the negative output port 15.

For the simple to operate, be equipped with extension board 19 between positive input port 12 and the negative pole input port 13, extension board 19 and casing 1 integrated into one piece are equipped with mounting hole 191 on the extension board 19, pass mounting hole 191 through the bolt and fix photovoltaic intelligence cutting-off device in the photovoltaic board frame.

In order to radiate more fully, ensure the safety of the photovoltaic intelligent turn-off device and prolong the service life of the photovoltaic intelligent turn-off device, a groove 16 which traverses the end surface of the shell 1 is arranged on the end surface of the shell 1 which is back to the bottom plate 2, and two rows of radiating fins 17 which traverse the end surface of the shell 1 and are vertical to the end surface of the shell 1 are arranged on two sides of the groove 16.

The direction of the groove 16 is vertical to the direction of the cable 5, and the height of the end face of the shell 1, which is provided with the radiating fins 17, is larger than the height of the edge of the shell 1.

In order to facilitate the disassembly and assembly, the cable 5 can be replaced in time when a problem occurs, and the end portions of the cable 5 are fixedly connected with the corresponding positive input connection portion 41, the corresponding negative input connection portion 42, the corresponding positive output connection portion 43 and the corresponding negative output connection portion 44 through screws.

The upper half parts of the anode input port 12, the cathode input port 13, the anode output port 14 and the cathode output port 15 are both in a semi-circular arc shape, and the lower half parts are both in a trapezoid shape.

The photovoltaic intelligent shutdown device of the embodiment further comprises a line card 6. The lower half parts of the positive input port 12, the negative input port 13, the positive output port 14 and the negative output port 15 are all provided with a line card slot 18 matched with the line card 6, and the line card 6 is fixedly connected in the line card slot 18 through ultrasonic welding so as to limit the cable 5.

One side of bottom plate 2 is equipped with a plurality of trip 21, and the bottom of casing 1 is equipped with the trip groove with trip 21 joint complex, and the opposite side that bottom plate 2 is relative is equipped with draw-in groove 22, and the bottom of casing 1 is equipped with the boss with draw-in groove 22 joint complex.

The control circuit board 4 adopts a circuit layout structure disclosed in chinese patent document CN 110417348A.

It should be understood that the above-described embodiments are merely examples provided for clearly illustrating the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious variations or modifications which fall within the spirit of the utility model are intended to be covered by the scope of the present invention.

Claims

1. The utility model provides a photovoltaic intelligence turn-off device which characterized in that: the cable-type solar cell module comprises a shell (1), a bottom plate (2), a control circuit board (4) and a cable (5), wherein the shell (1) is a cover plate provided with a cavity, the shape of the bottom plate (2) is matched with the shape of the opening of the cavity and is clamped and fixed at the opening of the cavity, an anode input port (12) and a cathode input port (13) are arranged on one side of the shell (1), and an anode output port (14) and a cathode output port (15) are arranged on the other side of the shell (1); control circuit board (4) are located just fix in the cavity on bottom plate (2), be equipped with anodal input junction (41) that is close to anodal input port (12), negative pole input junction (42) that is close to negative pole input port (13), anodal output junction (43) that is close to anodal output port (14) and negative pole output junction (44) that is close to negative pole output port (15) on control circuit board (4), anodal input junction (41) are connected a cable (5) and are passed anodal input port (12) and stretch out casing (1), negative pole input junction (42) are connected a cable (5) and are passed negative pole input port (13) and stretch out casing (1), anodal output junction (43) are connected a cable (5) and are passed anodal output port (14) and stretch out casing (1), negative pole output junction (44) are connected a cable (5) and are passed negative pole output port (15) and stretch out casing (1) A housing (1); the cavity is closed and filled with silica gel.

2. Photovoltaic intelligent shutdown device according to claim 1, characterized in that: the casing (1) main part is the rectangle, positive input port (12) and positive output port (14) set up and the opposite orientation for casing (1) symmetry, negative input port (13) and negative output port (15) set up and the opposite orientation for casing (1) symmetry.

3. Photovoltaic intelligent shutdown device according to claim 2, characterized in that: the end face of the shell (1) opposite to the bottom plate (2) is provided with a groove (16) which traverses the end face of the shell (1), and two rows of radiating fins (17) which traverse the end face of the shell (1) and are vertical to the end face of the shell (1) are arranged on two sides of the groove (16).

4. Photovoltaic intelligent shutdown device according to claim 3, characterized in that: the direction of the groove (16) is perpendicular to the direction of the cable (5), and the height of the position, where the radiating fins (17) are arranged, on the end face of the shell (1) is larger than the height of the edge of the shell (1).

5. Photovoltaic intelligent shutdown device according to any one of claims 1 to 4, characterized in that: the end parts of the cables (5) are fixedly connected with corresponding positive input connection parts (41), negative input connection parts (42), positive output connection parts (43) and negative output connection parts (44) through screws.

6. Photovoltaic intelligent shutdown device according to any one of claims 1 to 4, characterized in that: the upper half parts of the positive input port (12), the negative input port (13), the positive output port (14) and the negative output port (15) are both in a semi-circular arc shape, and the lower half parts are both in a trapezoid shape.

7. Photovoltaic intelligent shutdown device according to claim 6, characterized in that: the system also comprises a line card (6); the lower half of positive pole input port (12), negative pole input port (13), positive pole output port (14) and negative pole output port (15) all seted up with line card groove (18) of line card (6) assorted, thereby line card (6) are through ultrasonic welding fixed connection in line card groove (18) spacing cable (5).

8. Photovoltaic intelligent shutdown device according to any one of claims 1 to 4, characterized in that: one side of bottom plate (2) is equipped with a plurality of trip (21), the bottom of casing (1) be equipped with trip (21) joint complex trip groove, the opposite side that bottom plate (2) is relative is equipped with draw-in groove (22), the bottom of casing (1) be equipped with draw-in groove (22) joint complex boss.

9. Photovoltaic intelligent shutdown device according to any one of claims 1 to 4, characterized in that: an extension plate (19) is arranged between the positive input port (12) and the negative input port (13) of the shell (1), and a mounting hole (191) is formed in the extension plate (19).