CN211860051U

CN211860051U - Small-size high-efficiency heat-dissipation junction box

Info

Publication number: CN211860051U
Application number: CN202020881337.9U
Authority: CN
Inventors: 彭祁军; 郑朋朋; 李艳群; 朱于静
Original assignee: Zhejiang Xinhui Photovoltaic Technology Co ltd
Current assignee: Zhejiang Zhengtai Xinhui Photovoltaic Co ltd
Priority date: 2020-05-24
Filing date: 2020-05-24
Publication date: 2020-11-03
Anticipated expiration: 2030-05-24

Abstract

The utility model discloses a high-efficient radiating terminal box of little volume belongs to the structural design field of photovoltaic terminal box. The technical scheme of the utility model be the box body internal installation terminal and the diode of terminal box, each diode welding is between the terminal, with polylith terminal electric connection, all be equipped with one on every terminal and converge and take the perforation, converge and take the perforation to part the welding position of diode on the terminal, the distribution that staggers of welding position of each diode on the terminal. The diodes are divided into two groups at intervals, and the diodes in the odd group and the diodes in the even group are respectively positioned at two sides of the terminal. On one hand, the technical scheme leads the arrangement of the diodes on the terminal to be compact, occupies small space and can reduce the volume of the junction box; on the other hand, the distance between the pins of the diodes is farther, so that heat source points are distributed, and the heat dissipation of the junction box is facilitated.

Description

Small-size high-efficiency heat-dissipation junction box

Technical Field

The utility model belongs to the structural design field of photovoltaic terminal box, concretely relates to radiating terminal box of little volume high efficiency.

Background

At present, a photovoltaic module formed by combining solar cells is widely applied to various photovoltaic power generation systems of buildings as a basic photovoltaic power generation unit. In order to improve the power generation efficiency per unit area, various photovoltaic modules of novel and efficient structures are continuously developed and applied. In practical use, the electric energy generated by the photovoltaic module needs to be led out through the junction box to be connected with an external load. Therefore, the junction box is a key component of the photovoltaic module for constructing various power generation systems.

At present, the specification of the junction box is developed towards miniaturization, and the requirement on internal heat dissipation is higher and higher. The diodes on the internal terminal of the junction box are main heating elements, and generally, a plurality of diodes are arranged close to each other in a narrow space in the junction box, so that heat on the pins is relatively concentrated and cannot be dissipated, and the heat dissipation pressure in the junction box is very high. To solve the heat dissipation problem, the distance between the diodes is generally increased in the junction box, but this approach causes the volume of the junction box to increase.

Therefore, the optimization of the heat dissipation performance of the junction box is realized on the premise of not increasing the volume of the junction box, which is a target to be realized in the design of the junction box at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a radiating terminal box of little volume high efficiency to solve the radiating problem of volume and diode of the present terminal box that proposes in the above-mentioned background art.

The technical scheme of the utility model as follows:

the utility model provides a terminal box of high-efficient radiating of little volume, includes the box body, install terminal and diode in the box body, each diode welding is between the terminal, with polylith terminal electric connection, all be equipped with one on every terminal and converge and take the perforation, converge and take the perforation to separate the welding position of diode on the terminal, the distribution of staggering of welding position of each diode on the terminal.

Preferably, the diodes are divided into two groups one by one, and the diodes of the odd group and the diodes of the even group are respectively positioned at two sides of the terminal.

Preferably, the box body consists of a box cover and a bottom box, and the edge of the bottom box is connected with a bending surface.

Preferably, the two ends of the bottom box are respectively provided with a wire inlet end and a wire outlet end of the photovoltaic cable, and the bending surface is connected to one side of the bottom box, which is different from the wire inlet end and the wire outlet end of the photovoltaic cable.

Preferably, the bottom surface of the bottom box is a plane, and the bending surface is perpendicular to the bottom surface of the bottom box and bends downwards.

Preferably, the bottom surface of the bottom box is attached to the surface of the photovoltaic back plate, and the bending surface is attached to the edge of the photovoltaic back plate.

Preferably, a bus bar is installed in the bottom case.

Due to the adoption of the technical scheme, the utility model discloses a beneficial technological effect is:

the utility model provides a radiating terminal box of little volume high efficiency. On one hand, the arrangement of the diodes on the terminals is compact, the occupied space is small, and the volume of the junction box can be reduced; on the other hand, the distance between the pins of the diodes is farther, so that heat source points are distributed, and the heat dissipation of the junction box is facilitated; the third aspect is that the edge space of the back plate is utilized, the creepage distance from the position of the bus bar to the position capable of being touched is increased through the bending surface of the box body, the limiting effect is also achieved, and the adverse effects of battery shielding and the like caused by position deviation when the box at the bottom of the junction box is stuck with the plate are avoided.

Advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is an overall appearance diagram of the present invention.

Fig. 2 is an overall exploded view of the present invention.

Fig. 3 is a mounting diagram of the terminal and the diode.

Fig. 4 is a view showing the mounting of the terminals and the diode in the back case.

Fig. 5 is a perspective view of the back box.

Fig. 6 is a front view of the back box.

Fig. 7 is a left side view of the back box.

Fig. 8 is an installation view of the back box and the photovoltaic back sheet.

The various labels in the figure define: 1 lid, 2 terminals, 3 diodes, 4 end boxes, 5 buckles, 6 box body faces of bending, 7 converge and take, 8 photovoltaic backplate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1 shows the overall appearance of the junction box, and fig. 2 shows the structure of the junction box in an exploded view. Referring to fig. 1 and 2, the junction box of the present invention comprises a box body formed by buckling a box cover 1 and a bottom box 4. A plurality of terminals 2 and a plurality of diodes 3 are arranged in the box body. The diodes 3 are soldered between the terminals 2, and electrically connect the terminals 2. The terminals 2 are respectively fixed on the positioning columns in the bottom box 4 through the mounting holes on the terminals. The left end and the right end of the box body are respectively provided with a pressing buckle 5, the pressing buckle 5 is used for welding the photovoltaic cable with the terminal 2 in the box body after the photovoltaic cable passes through the pressing buckle 5, and the pressing buckle 5 is ultrasonically welded with the bottom box 4.

Fig. 3 shows a mounting structure of the terminal and the diode, and fig. 4 shows a mounting structure of the terminal and the diode in the bottom case. Referring to fig. 3 and 4, each terminal 2 is provided with an elongated bus bar through hole which separates the bonding locations of the diodes 3 on the terminals 2. Further, the diodes 3 are not soldered to the same side of the terminal 2, but are soldered to the terminal 2 at different positions. If all diodes 3 are divided into two groups one by one, the diodes 3 of the odd group and the diodes 3 of the even group are respectively positioned at two sides of the terminal 2. The purpose of doing so is on the one hand to realize compact arrangement, make the combination of diode 3 and terminal 2 more compact, the space that occupies is little, can reduce the volume of terminal box, and on the other hand is for the heat dissipation, and the distance between the pin of diode 3 is farther, and the heat dispersion makes the heat source point distribute, is favorable to the heat dissipation of terminal box.

Fig. 5, 6 and 7 show the structure of the bottom case of the present junction box by various angle views. Referring to fig. 5, 6 and 7, the bottom surface of the bottom box 4 is quadrilateral, the left side and the right side of the bottom box 4 are respectively provided with a wire inlet end and a wire outlet end of the photovoltaic cable, and one side of the bottom box 4, which is different from the wire inlet end and the wire outlet end of the photovoltaic cable, is connected with a box body bending surface 6. And only one side of the bottom box 4 is connected with the box body bending surface 6, and the other side opposite to the bottom box 4 is not required to be provided with the box body bending surface 6. The box body bending surface 6 is connected with the edge of the bottom box 4. The bottom surface of the bottom box 4 is a plane, and the box body bending surface 6 is perpendicular to the bottom surface of the bottom box 4 and is bent downwards.

Fig. 8 shows an installation diagram of the bottom box and the photovoltaic back plate of the junction box. Referring to fig. 8, the bottom surface of the bottom case 4 is attached to the surface of the photovoltaic back panel 8, and the bending surface 6 of the case body is attached to the edge of the photovoltaic back panel 8. The bottom box 4 is internally provided with a bus bar 7, the bus bar 7 penetrates into the junction box from the back and is welded with the terminal 2 in the junction box, and the shortest distance from the edge of the bus bar 7 to the side edge of the junction box is the creepage distance of the junction box. This terminal box has utilized backplate marginal space, has increased the creepage distance of converging 7 positions of taking to can touch the position through box body face 6 of bending. The box body bending surface 6 also plays a limiting role, and adverse effects such as shading batteries and the like caused by position deviation when the bottom box 4 is adhered to the photovoltaic backboard 8 are avoided.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a radiating terminal box of little volume high efficiency, includes the box body, install terminal and diode in the box body, each diode welding is between the terminal, with polylith terminal electric connection, its characterized in that: each terminal is provided with a bus bar through hole, the bus bar through holes separate the welding positions of the diodes on the terminals, and the welding positions of the diodes on the terminals are distributed in a staggered mode.

2. The small-volume high-efficiency heat dissipation junction box according to claim 1, wherein: the diodes are divided into two groups at intervals, and the diodes in the odd group and the diodes in the even group are respectively positioned on two sides of the terminal.

3. The small-volume high-efficiency heat dissipation junction box according to claim 1, wherein: the box body comprises lid and end box, the edge of end box is connected with the face of bending.

4. A small-sized and efficient heat-dissipating junction box according to claim 3, wherein: the two ends of the bottom box are respectively provided with an incoming line end and an outgoing line end of the photovoltaic cable, and the bending surface is connected to one side of the bottom box, which is different from the incoming line end and the outgoing line end of the photovoltaic cable.

5. A small-sized and efficient heat-dissipating junction box according to claim 3, wherein: the bottom surface of the bottom box is a plane, and the bending surface is perpendicular to the bottom surface of the bottom box and bends downwards.

6. The small-volume high-efficiency heat dissipation junction box according to claim 5, wherein: the bottom surface of the bottom box is attached to the surface of the photovoltaic backboard, and the bending surface is attached to the edge of the photovoltaic backboard.

7. A small-sized and efficient heat-dissipating junction box according to claim 3, wherein: and a convergence belt is arranged in the bottom box.