CN217608112U

CN217608112U - Photovoltaic module quick shutoff device of portable production

Info

Publication number: CN217608112U
Application number: CN202221335209.XU
Authority: CN
Inventors: 虞红峰; 冯成; 邓晓帆; 李宁达
Original assignee: Shanghai Shaoneng New Energy Technology Co ltd
Current assignee: Shanghai Shaoneng New Energy Technology Co ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-10-18
Anticipated expiration: 2032-05-31

Abstract

An object of the utility model is to provide a quick ware that closes of photovoltaic module of portable production contains shell structure, installs the PCB board in the shell structure inner chamber and the wire of being connected with the PCB board, wire and PCB board welded connection, and the junction of wire is equipped with subtracts the resistance layer, and the wire outside is equipped with promptly subtracts the resistance layer. After the metal plating layer is additionally arranged on the lead, the resistance reducing layer can be connected with metal (such as copper wires and aluminum wires) of the lead in parallel, so that the overcurrent capacity of the wire is increased, the impedance is reduced to a certain extent, the circuit is not prone to heating, and the efficiency and the service life in use are increased. The PCB board has been seted up the spliced eye, is equipped with the grafting post that is used for with the spliced eye grafting in shell structure's the inner chamber. The installation of the PCB and the shell structure can be completed after simple insertion, and the installation is convenient. In the present case, PCB board and shell structure pass through anchor clamps and colds pressing fixedly, connect more convenient and firm.

Description

Photovoltaic module quick shutoff device of portable production

Technical Field

The utility model relates to a photovoltaic power generation technical field, concretely relates to quick shutoff of photovoltaic module of portable production ware.

Background

Photovoltaic power generation technology is rapidly developed based on the reproducibility and cleanliness of solar energy. In a photovoltaic power generation system, a plurality of photovoltaic modules are connected in series to form a string, and then an inverter converts a direct current into an alternating current to be connected to a grid. The photovoltaic modules connected in series can generate direct current high voltage, and further high voltage accidents such as personal danger or fire accidents are caused.

In order to solve the potential safety hazard caused by high direct current voltage, the photovoltaic module is usually connected with a photovoltaic module shutoff device for quickly shutting down the photovoltaic module and preventing high voltage accidents in a photovoltaic power generation system. Chinese patent publication No. CN216216750U discloses a shutoff device, which comprises a circuit board, an electrical connection wire, a potting body and an insulating sleeve. The electric connection wire is connected with the circuit board in a terminal or bolt mode, the electric connection wire and the circuit board are connected to form an integral piece through encapsulation after the electric connection wire and the circuit board are connected, and the integral piece is finally sleeved in the insulating pipe sleeve to complete installation of the shutoff device. However, the shutoff device has the following problems: the electric connecting wire and the circuit board are connected with the circuit board through terminals or bolts, so that heat is easily generated to influence the efficiency and the service life of the product. In addition, the insulating sleeve is of an elastic structure such as a heat shrink tube and a rubber sleeve, when the insulating sleeve is sleeved on the circuit board and the electric connecting wire, the insulating sleeve is easily attached to and extruded with the circuit board due to the elastic characteristic of the insulating shell, and the insulating sleeve is not easy to install.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a quick turn-off device of photovoltaic module of portable production for the difficult heat production in electric connecting wire and the circuit board after being connected, availability factor and life-span are high, circuit board and packaging shell body simple to operate in this quick turn-off device in addition.

The above technical purpose of the utility model is realized through following technical scheme:

a portable photovoltaic module quick shutoff device comprises a shell structure, a PCB (printed circuit board) arranged in an inner cavity of the shell structure and a lead connected with the PCB, wherein the lead is welded with the PCB, and a resistance reducing layer is arranged outside the welding position of the lead; the PCB board is provided with a jack, and a jack column used for being plugged with the jack is arranged in an inner cavity of the shell structure.

From this, when the quick turn-off device of photovoltaic module of this portable production installs, connect PCB board and wire at first, wire and PCB board welded connection, the splice of wire is equipped with subtracts anti layer, and the wire outside is equipped with promptly and subtracts anti layer. The resistance reducing layer is a metal coating plated on the conducting wire, and the metal type can be silver, tin and other metals. After the metal plating layer is additionally arranged on the lead, the resistance reducing layer can be connected with metal (such as copper wires and aluminum wires) of the lead in parallel, so that the overcurrent capacity of the wire is increased, the impedance is reduced to a certain extent, the circuit is not prone to heating, and the efficiency and the service life in use are increased.

The PCB is connected with the shell structure after being connected with the lead. The shell structure comprises an inner cavity, the PCB is placed in the inner cavity of the shell structure, and then the plug holes in the PCB are plugged with the plug columns in the inner cavity. The installation of the PCB and the shell structure can be completed after simple insertion, and the installation is convenient. In the present case, PCB board and shell structure pass through anchor clamps and colds pressing fixedly, connect more convenient and firm.

As the preferred technical scheme of the utility model, the subtract anti-layer contains the tin layer, the thickness on tin layer is 0.2mm-0.4mm.

Therefore, the tin plating cost is low, and when the thickness of the tin layer is in the interval of 0.2mm-0.4mm, the resistance is reduced, and meanwhile, the installation is convenient due to the increased small size. In the scheme, the thickness of the tin layer is 0.3mm.

As an optimal technical scheme of the utility model, be equipped with in shell structure's the inner chamber and be used for fixing the line ball of wire is buckled.

Therefore, after the lead is connected with the PCB, only the welding part is fixedly connected, and the lead is easy to shake relative to the PCB to cause falling off. In order to fix the conducting wire, a wire pressing buckle connected with the shell structure is arranged. During installation, the wire is clamped and fixed between the wire pressing buckle and the shell structure to prevent movement.

As the utility model discloses a preferred technical scheme, the shell structure shell body is equipped with the ascending arc wall of opening, the line ball is detained be equipped with the opening downwards, with the lower arc wall of the upward arc wall adaptation of opening, the wire by the pressfitting last open arc wall with between the lower arc wall.

Therefore, the wire is easily damaged in the process of clamping and fixing the wire by the aid of the wire pressing buckle and the shell structure, and the wire is usually a pipe body with a radian. Specifically, shell structure's shell is equipped with the ascending arc groove of opening, and the line ball is buckled and is contained and go up the lower arc groove of opening the arc groove adaptation, and two arc grooves cooperate jointly to form the arc mouth that is used for the pressfitting wire to prevent to damage the wire.

As the utility model discloses a preferred technical scheme, the line ball is detained and is equipped with the screens lug that extends at the direction of height, shell structure be equipped with the screens groove of screens lug adaptation.

From this, shell structure is detained being equipped with that corresponds with the line ball and is opened arc groove and lower arc wall, need guarantee during the installation that two arc walls align, just can form the arc mouth that is used for the pressfitting wire. In order to facilitate the alignment of the two grooves, in the present case, the wire pressing buckle is provided with a clamping convex block extending in the height direction, and the shell structure is correspondingly provided with a clamping groove for clamping the clamping convex block. After screens lug installation to the screens groove, owing to all extend in the direction of height to inject both relative position on the horizontal direction, made things convenient for the alignment of two arc walls. The line ball is buckled and is connected through ultrasonic welding with shell structure, firm in connection.

As the utility model discloses an it is in to prefer technical scheme place in the shell structure inner chamber the PCB board reaches the wire passes through the casting glue and forms the embedment body, and the quick shutoff of photovoltaic module of this portable production still contains with the embedment body seals apron among the shell structure.

Therefore, the PCB and the lead need to form a pouring body after being poured and sealed by the pouring sealant, and the service life of the PCB is prolonged. After the potting body is formed, the cover plate is connected with the shell structure, the potting body is covered, external dust and water vapor are prevented from entering better, and the service life is prolonged. In addition, install the apron after the embedment earlier, can direct observation encapsulating process, reach better encapsulating effect.

As the utility model discloses a preferred technical scheme, shell structure contains the lock joint lug that extends at the horizontal direction, the apron contain with the catching groove of lock joint lug lock joint.

Therefore, the cover plate and the shell structure are fastened through the fastening lug and the fastening groove, and the cover plate is convenient to mount and dismount.

As the utility model discloses an optimized technical scheme, contain in the shell structure inner chamber and be used for the location the locating lug of PCB board, locating lug with the draw-in groove of PCB board corner block.

Therefore, for better positioning the position of the PCB in the inner cavity of the shell structure, the shell structure is provided with a positioning lug in the inner cavity. The corner of the PCB is clamped and abutted with the clamping groove of the positioning lug to achieve the positioning effect.

To sum up, the utility model discloses a technical scheme compares and has following beneficial effect in prior art:

1. and an anti-corrosion layer is arranged outside the lead. The resistance reducing layer is a metal coating plated on the conducting wire, and the metal type can be silver, tin and other metals. After the metal plating layer is additionally arranged on the lead, the resistance reducing layer can be connected with metal (such as copper wires and aluminum wires) of the lead in parallel, so that the overcurrent capacity of the wire is increased, the impedance is reduced to a certain extent, the circuit is not prone to heating, and the efficiency and the service life in use are increased.

2. The plug hole on the PCB board is plugged with the plug column in the inner cavity. The installation of the PCB and the shell structure can be completed after simple insertion, and the installation is convenient.

3. In order to fix the conducting wire, a wire pressing buckle connected with the shell structure is arranged. During installation, the wire is clamped and fixed between the wire pressing buckle and the shell structure to prevent movement.

4. The shell structure is provided with an arc-shaped groove corresponding to the wire pressing buckle. Shell structure's shell is equipped with the ascending arc groove of opening, and the line ball is buckled and is contained and go up the lower arc groove of opening the arc groove adaptation, and two arc grooves cooperate jointly to form the arc mouth that is used for the pressfitting wire to prevent to damage the wire.

5. In order to facilitate the alignment of the two grooves, the wire pressing buckle is provided with a clamping convex block extending in the height direction, and the shell structure is correspondingly provided with a clamping groove for clamping the clamping convex block. After screens lug installation to the screens groove, owing to all extend in the direction of height to inject both relative position on the horizontal direction, made things convenient for the alignment of two arc walls.

Description of the drawings:

in order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a portable photovoltaic module quick shutoff apparatus of the present invention;

fig. 2 is an enlarged schematic structural view of the portable photovoltaic module quick cut-off device of the present invention;

fig. 3 is a schematic structural diagram of the photovoltaic module quick shutoff device for portable production of the utility model.

In the figure:

1. PCB board, 11, spliced eye, 2, shell structure, 21, spliced pole, 22, go up open arc groove, 23, lock joint lug, 24, location lug, 3, wire, 4, line ball are buckled, 41, lower open arc groove, 42, screens lug, 5, apron, 51, catching groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Embodiment 1, as shown in fig. 1, a portable photovoltaic module quick shutoff device includes a housing structure 2, a PCB board 1 installed in an inner cavity of the housing structure 2, and a lead 3 connected to the PCB board 1. When the photovoltaic module quick shutoff device for portable production is installed, the lead 3 and the PCB 1 are connected firstly. The lead 3 is connected with the PCB board 1 through welding, and the welding position of the lead 3 is provided with a resistance reducing layer, namely the outer part of the lead 3 is provided with the resistance reducing layer. The resistance reducing layer is a metal plating layer plated on the lead 3, and the metal type can be silver, tin and other metals. After the metal plating layer is additionally arranged on the lead 3, the resistance reducing layer can be connected with metal (such as copper wires and aluminum wires) of the lead in parallel, so that the overcurrent capacity of the lead is increased, the impedance is reduced to a certain extent, a circuit is not easy to generate heat, and the efficiency and the service life in use are increased. In this embodiment, the resistance reducing layer is a tin plating layer, and the thickness of the tin layer is 0.3mm. The tinning cost is low, and when the tinning cost is 0.3mm, the resistance is reduced, and meanwhile, the tinning device is convenient to mount due to the small added volume.

After the lead 3 is connected with the PCB board 1, the PCB board 1 is mounted in the inner cavity of the housing structure 2. The PCB board 1 is provided with a plug hole 11, and a plug column 21 for being plugged with the plug hole 11 is arranged in the inner cavity of the shell structure 2. The plug hole 11 is plugged with the plug column 21. The installation of the PCB board 1 and the shell structure 2 can be completed after simple insertion, and the installation is convenient. In this embodiment, the PCB board 1 and the housing structure 2 are fixed by cold pressing through the fixture, and the connection is more convenient and firm.

As shown in fig. 1 to 3, after the lead 3 is connected to the PCB 1, only the welded portion is fixedly connected, and the lead 3 is easily shaken relative to the PCB 1, resulting in falling off. For fixing the conductor 3, a crimp buckle 4 is provided which is connected to the housing structure 2. When the cable is installed, the conductor 3 is clamped and fixed between the cable clamp 4 and the shell structure 2 to prevent movement. The wire 3 is easily damaged in the process of clamping and fixing the wire 3 by the wire pressing buckle 4 and the shell structure 2, and based on the fact that the wire 3 is usually a pipe body with a radian, in this embodiment, the shell structure 2 and the wire pressing buckle 4 are correspondingly provided with arc-shaped grooves. Specifically, shell structure 2's shell is equipped with the ascending arc groove 22 of opening, and the line ball is detained 4 and is contained the lower arc groove 41 with the last arc groove 22 adaptation of opening, and two arc grooves cooperate jointly to form the arc mouth that is used for pressfitting wire 3 to prevent to damage wire 3. Wires 3 extend out of the housing structure 2 from the arcuate opening for connection to an external circuit.

The shell structure 2 is provided with an upper arc-shaped groove 22 and a lower arc-shaped groove 41 corresponding to the wire pressing buckle 4, and two arc-shaped grooves need to be aligned during installation so as to form an arc-shaped opening for pressing the lead 3. In order to facilitate the alignment of the two slots, in the present embodiment, the wire pressing buckle 4 is provided with a locking protrusion 42 extending in the height direction, and the housing structure 2 is correspondingly provided with a locking slot (not shown) for locking the locking protrusion 42. After the clamping convex block 42 is installed in the clamping groove, the two arc-shaped grooves are aligned conveniently due to the fact that the clamping convex block extends in the height direction and the relative positions of the clamping convex block and the clamping groove in the horizontal direction are limited. The wire pressing buckle 4 is connected with the shell structure 2 through ultrasonic welding, and the connection is firm.

As shown in fig. 1 and 2, the PCB 1 and the wires 3 need to be encapsulated by the potting compound to form a potting body, so as to increase the service life of the PCB 1. After forming the encapsulation body, apron 5 is connected with shell structure 2 again, including establishing the encapsulation body lid, prevents outside dust, steam entering better, increases life. In addition, install apron 5 after the embedment earlier, can direct observation encapsulating, reach better encapsulating effect.

The housing structure 2 includes a buckling protrusion 23 extending in a horizontal direction, and the cover plate 5 includes a buckling groove 51 buckled with the buckling protrusion 23. The cover plate 5 and the shell structure 2 are fastened through the fastening convex block 23 and the fastening groove 51, and the installation and the disassembly are convenient.

For better positioning of the PCB board 1 in the cavity of the housing structure 2, the housing structure 2 is provided with positioning projections 24 in the cavity. The corners of the PCB 1 are engaged with the notches of the positioning protrusions 24 to achieve the positioning effect.

The above description is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure should not be limited thereby. It is intended that all equivalent variations and modifications made in accordance with the teachings of the present disclosure be covered thereby. Embodiments of the present disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A photovoltaic module quick shutoff device for portable production comprises a shell structure (2), a PCB (1) installed in an inner cavity of the shell structure (2) and a lead (3) connected with the PCB (1), and is characterized in that the lead (3) is connected with the PCB (1) in a welding manner, and a resistance reducing layer is arranged outside the welding position of the lead (3); the PCB board (1) is provided with a plug hole (11), and a plug column (21) for being plugged with the plug hole (11) is arranged in an inner cavity of the shell structure (2).

2. A portable production photovoltaic module quick shut-off device as claimed in claim 1, wherein the impedance reducing layer comprises a tin layer having a thickness of 0.2mm to 0.4mm.

3. A portable production photovoltaic module fast shut-off device according to claim 1, characterized in that a wire clip (4) for fixing the wire (3) is provided in the inner cavity of the housing structure (2).

4. The photovoltaic module quick turn-off device for portable production according to claim 3, characterized in that the outer shell of the shell structure (2) is provided with an upward-opening arc-shaped groove (22) with an upward opening, the wire pressing buckle (4) is provided with a downward-opening arc-shaped groove (41) matched with the upward-opening arc-shaped groove (22), and the wires (3) are pressed between the upward-opening arc-shaped groove (22) and the downward-opening arc-shaped groove (41).

5. A portable photovoltaic module quick shut-off device according to claim 4, characterized in that the cable tie-in buckle (4) is provided with a locking projection (42) extending in the height direction, and the housing structure (2) is provided with a locking groove adapted to the locking projection (42).

6. A portable production photovoltaic module quick shut-off device according to claim 1, characterized in that the PCB board (1) and the wires (3) placed in the inner cavity of the housing structure (2) form a potting body by means of potting adhesive, and the portable production photovoltaic module quick shut-off device further comprises a cover plate (5) enclosing the potting body in the housing structure (2).

7. A portable photovoltaic module quick-closing device according to claim 6, characterized in that the housing structure (2) comprises a fastening projection (23) extending in a horizontal direction, and the cover plate (5) comprises a fastening groove (51) fastened to the fastening projection (23).

8. A portable photovoltaic module quick-closing device according to claim 1, characterized in that the inner cavity of the casing structure (2) contains a positioning projection (24) for positioning the PCB board (1), and the positioning projection (24) contains a slot for engaging with the corner of the PCB board (1).