CN220963810U - Binding post, dc-to-ac converter and photovoltaic system - Google Patents

Abstract

The utility model relates to the technical field of inverters, and discloses a wiring terminal, an inverter and a photovoltaic system. The wiring terminal comprises a conductive core, the conductive core comprises a conductive core main body and a fixing piece, a first end of the conductive core main body is used for being in plug-in fit with the plug, a second end of the conductive core main body is provided with a contact surface, and the contact surface is configured to be matched with the wiring surface of the circuit board so as to be in contact electrical connection with the circuit board; the mounting sets up in the second end of electrically conductive core main part for with the second end and circuit board fixed connection after the laminating contact. The conductive core main body is directly connected to the circuit board inside the inverter, so that the connection between the second end of the conductive core main body and the circuit board is more convenient and efficient, the assembly difficulty is reduced, the contact resistance is reduced, the heat loss is reduced, the internal space of the inverter can be regulated, and the space utilization rate is improved. On the basis, through setting up the mounting, can make the connection of conductive core main part and circuit board more reliable and more stable, avoid contact failure between conductive core main part and the circuit board.

Description

Binding post, dc-to-ac converter and photovoltaic system

Technical Field

The utility model relates to the technical field of inverters, in particular to a wiring terminal, an inverter and a photovoltaic system.

Background

In the photovoltaic system, the photovoltaic panel is responsible for converting solar energy into electric energy, and the inverter is responsible for inverting the electric energy generated by the photovoltaic panel so as to meet the power consumption requirement of a terminal or be integrated into a power grid. The inside circuit board that is equipped with of dc-to-ac converter among the prior art, in order to realize the electrical connection between photovoltaic board and the dc-to-ac converter, the electric energy of photovoltaic board transport in often is connected electrically conductive core and circuit board through the mode of cable, but the cable contact resistance of crimping is great, and the heat loss is big.

Therefore, it is desirable to provide a connection terminal, an inverter and a photovoltaic system to solve the above problems.

Disclosure of utility model

The first object of the present utility model is to provide a connection terminal, in which the connection between the conductive core and the circuit board is more convenient and efficient, the contact resistance is reduced, and the heat loss is reduced.

A second object of the present utility model is to provide an inverter, in which the above-mentioned connection terminals are provided, so that the difficulty in assembly can be reduced, the man-hour for assembly can be reduced, the contact resistance can be reduced, and the heat loss can be reduced.

A third object of the present utility model is to provide a photovoltaic system, in which the inverter is provided, so that the difficulty in assembly can be reduced, the man-hour for assembly can be reduced, the contact resistance can be reduced, and the heat loss can be reduced.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

A terminal comprising a conductive core, the conductive core comprising:

The first end of the conductive core body is used for being in plug-in fit with the plug, and the second end of the conductive core body is provided with a contact surface which is configured to be matched with a wiring surface of a circuit board so as to be in contact electrical connection with the circuit board;

The fixing piece is arranged at the second end of the conductive core main body and is used for fixedly connecting the second end after the bonding contact with the circuit board.

As an alternative scheme, the mounting includes nut and first fastener, the nut is fixed in the surface of the second end of electrically conductive core main part, first through-hole has been seted up on the circuit board, the second through-hole has been seted up to the second end of electrically conductive core main part, first fastener pass in proper order first through-hole and second through-hole back with nut threaded connection.

As an alternative scheme, the conductive core main body comprises a first connecting portion, a second connecting portion and a transition portion, wherein the transition portion is connected between the first connecting portion and the second connecting portion, the first connecting portion is cylindrical and is used for being matched with the plug in an inserting mode, the second connecting portion is flat and is used for being in contact with the circuit board in a fitting mode, and the nut is fixed on the surface of the second connecting portion.

As an alternative, the transition portion is formed with a reinforcing rib.

As an alternative, the connection terminal includes two conductive cores.

As an alternative scheme, binding post still includes shell and two plugs, two the plug interval set up in on the shell, two the plug all with the inside intercommunication of shell, two the conducting core is all located in the shell, two the first end of conducting core main part peg graft respectively in corresponding in the plug, two the second end of conducting core main part all expose in the shell and with circuit board contact electricity is connected.

As an alternative, the two plugs are arranged at intervals along the first direction, the two conductive cores are arranged at intervals along the first direction, the second ends of the two conductive core bodies are arranged at intervals along the second direction and are positioned in the same plane, and the first direction is perpendicular to the second direction.

As an alternative, the housing includes:

The conductive core comprises a first side cover and a second side cover, wherein the first side cover and the second side cover are buckled to form a containing cavity, a notch is formed in one side of the containing cavity, two conductive cores are positioned in the containing cavity, and the second end of the conductive core main body can be exposed from the notch;

And the end covers are arranged at one ends of the first side cover and the second side cover, and the two plugs are arranged on the end covers.

As an alternative, a first sealing ring is arranged on one side of the end cover, which faces away from the plug, and the first sealing ring is circumferentially arranged along the end cover.

As an alternative scheme, be equipped with the location portion on the inside wall of shell, set up the locating hole on the location portion, the locating hole is used for the location the nut of mounting.

As an alternative scheme, be equipped with first spacing portion on one of them lateral wall of shell inside, be equipped with second spacing portion on the other lateral wall, first spacing portion with second spacing portion sets up relatively, first spacing portion with second spacing portion can the butt respectively in the opposite both sides of the second end of electrically conductive core main part.

As an alternative scheme, be equipped with third spacing portion on the inside wall of shell, the both ends of third spacing portion can respectively the butt in two the second end of electrically conductive core main part.

An inverter comprising a box body, a circuit board and any one of the wiring terminals, wherein the circuit board is positioned inside the box body, the wiring terminals are detachably connected to the box body, and the second end of the conductive core main body is in contact electrical connection with the circuit board.

The photovoltaic system comprises a photovoltaic panel and the inverter, wherein the photovoltaic panel is electrically connected with a circuit board of the inverter through the wiring terminal.

The beneficial effects of the utility model are as follows:

According to the wiring terminal provided by the utility model, the first end of the conductive core main body can be electrically connected with an external current input terminal, and the second end of the conductive core main body is electrically connected with the circuit board, so that electric energy conveyed by the photovoltaic board can be input into the main loop of the inverter. The conductive core main body can be directly connected to a circuit board in the inverter, so that on one hand, the connection between the tail part of the conductive core main body and the circuit board is more convenient and efficient, the assembly difficulty and the quality control difficulty can be greatly reduced, and the assembly time is reduced; on the other hand, the conductive core main body is connected with the circuit board through a wireless cable, so that the contact resistance is reduced, the heat loss is reduced, and the working efficiency of the inverter is improved; in still another aspect, the internal space of the inverter can be regulated, and the space utilization can be improved. On the basis, through setting up the mounting, can make the connection of conductive core main part and circuit board more reliable and more stable, avoid contact failure between conductive core main part and the circuit board.

According to the inverter provided by the utility model, the wiring terminal is arranged, so that the assembly difficulty and the quality control difficulty can be reduced, the assembly time is reduced, the internal space of the inverter is regulated, the space utilization rate is improved, the contact resistance is reduced, and the heat loss is reduced.

According to the photovoltaic system provided by the utility model, the inverter is arranged, so that the assembly difficulty and the quality control difficulty can be reduced, the assembly time is reduced, the internal space of the inverter is regulated, the space utilization rate is improved, the contact resistance is reduced, and the heat loss is reduced.

Drawings

For a more obvious and understandable description of embodiments of the utility model or solutions according to the prior art, reference will be made to the accompanying drawings, which are used in the description of the embodiments or the prior art and which are examples of the utility model, and from which other drawings can be obtained without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an inverter according to an embodiment of the present utility model;

Fig. 2 is an exploded view of an inverter provided by an embodiment of the present utility model;

Fig. 3 is a schematic structural diagram of a connection terminal according to an embodiment of the present utility model at a first view angle;

Fig. 4 is an exploded view of a terminal provided by an embodiment of the present utility model;

Fig. 5 is a schematic structural diagram of a conductive core according to an embodiment of the present utility model at a first view angle;

Fig. 6 is a schematic structural diagram of a conductive core according to an embodiment of the present utility model at a second view angle;

FIG. 7 is a schematic view of a conductive core according to another embodiment of the present utility model;

FIG. 8 is a schematic view of a housing according to another embodiment of the present utility model;

FIG. 9 is a schematic diagram illustrating the mating of a plug and a housing according to another embodiment of the present utility model;

Fig. 10 is a schematic structural view of a connection terminal according to an embodiment of the present utility model at a second view angle;

Fig. 11 is a schematic structural view of a connection terminal according to another embodiment of the present utility model;

FIG. 12 is a schematic view of three different forms of plug provided by embodiments of the present utility model;

FIG. 13 is a schematic view of another plug according to an embodiment of the present utility model;

FIG. 14 is a schematic view of a plug according to another embodiment of the present utility model;

fig. 15 is a cross-sectional view of a terminal provided by an embodiment of the present utility model;

fig. 16 is an exploded view of a housing provided by an embodiment of the present utility model.

In the figure:

10. A connection terminal; 11. a housing; 111. a first side cover; 1111. a first limit part; 1112. a fourth limit part; 112. a second side cover; 1121. a second limit part; 1122. a positioning part; 1123. positioning holes; 1124. a third limit part; 113. an end cap; 1131. a first connection hole; 1132. a buckle; 114. a receiving chamber; 115. a notch; 12. a plug; 121. a threaded portion; 13. a conductive core; 130. a conductive core body; 131. a first connection portion; 132. a second connecting portion; 1321. a second through hole; 133. a transition section; 1331. reinforcing ribs; 140. a fixing member; 134. a nut; 135. a first fastener; 14. a first seal ring; 15. a second seal ring;

20. a case; 21. a second connection hole; 22. a mounting hole; 23. a second fastener;

30. A circuit board; 31. a first through hole;

40. A temperature sensor.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1 and 2, the present embodiment provides an inverter, which includes a case 20, a circuit board 30 and a connection terminal 10, wherein the circuit board 30 is located inside the case 20, the connection terminal 10 is detachably connected to the case 20, a mounting hole 22 is formed in the case 20, and the connection terminal 10 is electrically connected to the circuit board 30 after passing through the mounting hole 22 of the case 20.

Specifically, as shown in fig. 3 and 4, the connection terminal 10 includes a housing 11, two plugs 12, and two conductive cores 13, the housing 11 is inserted through the mounting hole 22 and connected to the case 20, the two plugs 12 are disposed on the housing 11 at intervals, and the two plugs 12 are both communicated with the interior of the housing 11; the two conductive cores 13 are all arranged in the shell 11, one ends of the two conductive cores 13 are respectively inserted into the corresponding plugs 12, and the other ends of the two conductive cores are exposed out of the shell 11 and are in contact electrical connection with the circuit board 30 of the inverter. It should be noted that, in order to reduce the manufacturing difficulty, in this embodiment, the number of the conductive cores 13 and the plugs 12 is preferably two, and in other embodiments, the number of the conductive cores 13 and the plugs 12 may be three, four or more, which is not particularly limited herein.

Taking one of the conductive cores 13 as an example for describing the structure, as shown in fig. 4, the conductive core 13 specifically includes a conductive core main body 130 and a fixing member 140, where two ends of the conductive core main body 130 facing away are defined as a first end and a second end, the first end is used for being in plug-in fit with the plug 12, the second end is exposed outside the housing 11, and the second end has a contact surface, and the contact surface is configured to be matched with a wiring surface of the circuit board 30 so as to be in contact electrical connection with the circuit board 30; the fixing piece 140 is disposed at the second end of the conductive core body 130, and the fixing piece 140 is used for fixedly connecting the second end after the contact with the connection surface of the circuit board 30. It should be noted that, the connection surface of the circuit board 30 is the surface of the exposed copper layer on the circuit board 30.

The photovoltaic panel can be inserted with the plug 12 through the current input terminal in a pair of positive and negative plugs 12, so that the electrical connection between the photovoltaic panel and the inverter is realized. After the external current input terminal is inserted into the plug 12, the second end of the conductive core main body 130 is connected with the plug spring of the current input terminal to form electric conduction, and the second end of the conductive core main body 130 is exposed and then is electrically connected with the circuit board 30, so that the electric energy conveyed by the photovoltaic panel can be input into the main loop of the inverter. The conductive core main body 130 can be directly connected to the circuit board 30 in the inverter, so that on one hand, the connection between the second end of the conductive core main body and the circuit board 30 is more convenient and efficient, the assembly difficulty and the quality control difficulty can be greatly reduced, and the assembly working hours are reduced; on the other hand, the conductive core main body 130 is connected with the circuit board 30 in a cable-free manner, so that the contact resistance is reduced, the heat loss is reduced, and the working efficiency of the inverter is improved; in still another aspect, the internal space of the inverter can be regulated, and the space utilization can be improved. On the basis, through the fixing piece 140, the connection between the conductive core main body 130 and the circuit board 30 can be more stable and reliable, and poor contact between the conductive core main body 130 and the circuit board 30 is avoided.

As shown in fig. 5, the conductive core main body 130 is an integrally formed structure, and includes a first connecting portion 131, a second connecting portion 132 and a transition portion 133, where the transition portion 133 is connected between the first connecting portion 131 and the second connecting portion 132, and the transition portion 133 is flat and mainly plays a role in connecting the first connecting portion 131 and the second connecting portion 132, and the first connecting portion 131 is cylindrical and is used for being in plug-in fit with the plug 12, and the second connecting portion 132 is flat and is used for being in contact with the circuit board 30 to electrically connect, and the second connecting portion 132 is flat and can increase the contact area between the second connecting portion 132 and the circuit board 30, so that good electrical connectivity between the second connecting portion 132 and the circuit board 30 is ensured, and connection stability and electrical transmission stability are improved. The first connection portion 131 is a first end of the conductive core body 130, the second connection portion 132 is a second end of the conductive core body 130, and a surface of the second connection portion 132 is a contact surface of the second end of the conductive core body 130.

Referring to fig. 4 and 15 again, the two plugs 12 are arranged at intervals up and down, the two conductive cores 13 are also arranged at intervals up and down, the first connection portion 131 of the conductive core main body 130 located at the upper side is inserted into the plug 12 located at the upper side, the first connection portion 131 of the conductive core main body 130 located at the lower side is inserted into the plug 12 located at the lower side, the second connection portions 132 of the two conductive core main bodies 130 are arranged on a straight line along the length direction of the connecting terminal 10, and the two second connection portions 132 are required to be located in the same horizontal plane, so that the transition portion 133 of the conductive core main body 130 located at the lower side needs to be bent upwards, and the transition portion 133 of the conductive core main body 130 located at the upper side can be selectively bent or not bent. Taking the conductive core 13 located on the lower side as an example, as shown in fig. 6, in one embodiment, the transition portion 133 may be bent at 90 °. In another embodiment, the transition portion 133 may be bent at other angles, such as an acute angle or an obtuse angle as shown in fig. 7, which is not limited herein.

As shown in fig. 12, the transition portion 133 is formed with a reinforcing rib 1331 for increasing the strength of the conductive core 13. The reinforcing rib 1331 may be formed by embossing, and meanwhile, the reinforcing rib 1331 may be provided at any position of the transition portion 133, which is not particularly limited herein.

Referring to fig. 2 and fig. 4 to fig. 6, in this embodiment, the fixing member 140 includes a nut 134 and a first fastener 135, the circuit board 30 is located on the upper surface of the conductive core main body 130, two first through holes 31 are formed in the circuit board 30, a second through hole 1321 is formed in each second connecting portion 132, the two first through holes 31 and the two second through holes 1321 are in one-to-one correspondence, the nut 134 is fixed at the bottom end of the second connecting portion 132, and the threaded hole of the nut 134 is opposite to the second through hole 1321.

After the circuit board 30 is placed on the upper surface of the second connection portion 132, the first fastener 135 sequentially passes through the first through hole 31 and the second through hole 1321 from top to bottom and then is in threaded connection with the nut 134, so that the circuit board 30 is fixedly connected with the conductive core main body 130. After the wiring terminal 10 is assembled, the nut 134 is located inside the housing 11 and is not exposed, so that the nut 134 cannot be screwed, and by fixing the nut 134 to the bottom of the second connecting portion 132, the fixing of the circuit board 30 and the conductive core main body 130 can be achieved by only screwing the first fastener 135, and the nut 134 cannot rotate along with the rotation. Wherein the first fastener 135 may be a screw or a bolt. By adopting the above mode, the connection between the second connecting part 132 and the circuit board 30 is simpler, more convenient, more firm and more reliable. In another embodiment, the circuit board 30 may also be located below the conductive core body 130, where the nut 134 is fixed on the upper surface of the second connecting portion 132, and the first fastener 135 is screwed with the nut 134 through the first through hole 31 and the second through hole 1321 sequentially from bottom to top.

In another embodiment, the second connection portion 132 may be welded and fixed with a threaded post, and after the threaded post passes through the hole of the circuit board 30, the threaded post is screwed with a nut, so that the connection between the second connection portion 132 and the circuit board 30 can be achieved. In other embodiments, the connection manner of the second connection portion 132 and the circuit board 30 may be one of a snap connection manner or a plug connection manner, which is not limited herein.

The shape and the molding manner of the nut 134 at the bottom of the second connecting portion 132 are not limited herein, and may be square, circular, polygonal, or other shapes. The nut 134 may be fixed to the bottom surface of the second connection part 132 by welding, may be press-riveted to the second connection part 132, or may directly form a screw hole in the second connection part 132 by a tapping process.

As shown in fig. 3 and 4, the housing 11 includes a first side cover 111, a second side cover 112 and an end cover 113, where the first side cover 111 and the second side cover 112 are fastened to form a receiving cavity 114, the top of the receiving cavity 114 has two notches 115, the two conductive cores 13 are both located in the receiving cavity 114, and the second connection portion 132 thereof can be exposed from the notches 115. The end cover 113 is arranged at one end of the first side cover 111 and the second side cover 112, the two plugs 12 are arranged on the end cover 113, and the end cover 113 is used for being connected with the box body 20 of the inverter. After the first side cover 111 and the second side cover 112 are fastened, one end thereof has an opening, and the end cover 113 is used for blocking the opening, so that the housing 11 is configured in a box shape to encapsulate the conductive core 13, and only the second connection portion 132 is exposed for connecting the circuit board 30.

As shown in fig. 4, in the present embodiment, the end cover 113 is integrally formed with the first side cover 111, and when mounted, the second side cover 112 is aligned with the first side cover 111, and then the second side cover 112 is fixed to the corresponding position of the end cover 113 by one of ultrasonic welding, screw fixation, or snap connection. In another embodiment, as shown in fig. 8, the end cover 113, the first side cover 111 and the second side cover 112 may be formed separately, and then connected together by one of ultrasonic welding, screw fixing or snap connection. In another embodiment, the first side cover 111 and the second side cover 112 may be omitted, and only one end cover 113 may be provided, which is not particularly limited herein.

In one embodiment, two plugs 12 are integrally formed with end cap 113. In another embodiment, as shown in fig. 9, the two plugs 12 and the end cover 113 may be separately provided, that is, the plugs 12 are provided with a threaded portion 121, and the plugs 12 are screwed with the end cover 113 through the threaded portion 121. Meanwhile, a second sealing ring 15 is arranged at the joint surface of the plug 12 and the threaded part 121, and the second sealing ring 15 is used for sealing between the plug 12 and the end cover 113 when the plug 12 is in threaded connection with the end cover 113.

Referring to fig. 2 and 3, in one embodiment, the upper and lower ends of the end cover 113 are respectively provided with a first connection hole 1131, the first connection holes 1131 are threaded holes or light holes, the upper and lower sides of the mounting hole 22 on the box 20 are respectively provided with a second connection hole 21, the second connection holes 21 are threaded holes, the tail of the housing 11 passes through the mounting hole 22 and then abuts against the end cover 113 on the outer side of the box 20, the two first connection holes 1131 and the two second connection holes 21 are in one-to-one correspondence, and the second fasteners 23 sequentially pass through the first connection holes 1131 and the second connection holes 21 to connect the end cover 113 on the box 20, thereby fixing the whole connecting terminal 10 on the box 20. Wherein the second fastener 23 may be a screw, a bolt or a bolt-nut combination.

In another embodiment, as shown in fig. 11, two sides of the end cover 113 are provided with a buckle 1132, and the end cover 113 may be connected to the case 20 through the buckle 1132.

As shown in fig. 4 and 10, in the present embodiment, the side of the end cap 113 facing away from the spigot 12 is provided with a first seal ring 14, and the first seal ring 14 is circumferentially disposed around the end cap 113. It will be appreciated that photovoltaic panels and inverters are commonly used outdoors and that the terminals 10 are typically required to be waterproof and dustproof in order to enable the inverter to operate stably in an hostile environment. When the end cover 113 is connected with the box body 20, the first sealing ring 14 seals between the end cover 113 and the box body 20, so that the wiring terminal 10 achieves the waterproof and dustproof effects. The material of the first sealing ring 14 may be, but not limited to, rubber, polyurethane, polytetrafluoroethylene or other materials. In other embodiments, the sealing is not limited to the first sealing ring 14, and other sealing manners may be adopted, for example, the sealing glue is coated on the end cover 113 and the case 20 to achieve the sealing effect, which is not limited herein.

Referring to fig. 4, it should be noted that, when the terminal 10 is assembled, the first sealing ring 14 is first sleeved from one end of the first side cover 111 away from the end cover 113 and placed on the installation plane of the end cover 113, then the two conductive cores 13 are inserted into the corresponding plugs 12, then the second side cover 112 is opposite to the first side cover 111, and the second side cover 112 is welded to the corresponding position of the end cover 113 by ultrasonic welding, after the terminal 10 is assembled, the terminal is fixed to the case 20, and finally the circuit board 30 is connected to the second connection portion 132.

The two plugs 12 are positive and negative, i.e., one is a male plug and the other is a female plug, and are respectively inserted with the female plug and the male plug of the external current input terminal, thereby realizing the electrical connection between the photovoltaic panel and the inverter. In different embodiments, as shown in the first and second diagrams in fig. 12, the rotation directions of the plugs 12 may be different, and may be flexibly set according to actual requirements. In different embodiments, as shown in the second and third diagrams in fig. 12, the relative distances between the two plugs 12 may also be different, and may be flexibly set according to actual requirements.

Referring to fig. 3 and 4, the two plugs 12 are arranged at intervals along a first direction (X direction), the two conductive cores 13 are also arranged at intervals along the first direction, the second connection portions 132 of the two conductive core bodies 130 are arranged at intervals along a second direction (Y direction) and are located in the same plane, the plane is flat with the plane of the circuit board 30, and the first direction is perpendicular to the second direction. Through above-mentioned setting for conductive core 13 is taken out more easily for plug 12 and is inserted, has improved conductive core 13's dismouting convenience, and after binding post 10 cartridge is on box 20, circuit board 30 can be directly with two second connecting portion 132 contact electricity be connected, convenient operation is swift, makes the thickness of whole binding post 10 thinner relatively simultaneously, and the space that occupies is littleer, thereby can regular inverter's inner space, improves space utilization.

As an example, referring to fig. 2 and 15 again, in the present embodiment, the circuit board 30 is horizontally disposed in the case 20, the first direction is the up-down direction, and the second direction is the length direction of the terminal 10, that is, the two plugs 12 are arranged on the same vertical line at intervals along the up-down direction, so that the two conductive cores 13 are arranged at intervals up-down, and the second connection portions 132 of the two conductive core bodies 130 are arranged on the same horizontal plane along the length direction of the terminal 10, so that the thickness of the whole terminal 10 is relatively thinner and the length is relatively longer. As shown in fig. 13, in another embodiment, the two plugs 12 may be arranged in a staggered manner or in a horizontal direction, and correspondingly, the two conductive cores 13 are arranged left and right, and the second connection portions 132 of the two conductive core bodies 130 are arranged along the width direction of the housing 11, so that the thickness of the whole connection terminal 10 is relatively thicker, and the length is relatively shorter, so that the space at the tail of the whole connection terminal 10 can be compressed.

In one embodiment, the side of the end cap 113 near the plug 12 may be shaped to have corresponding signs according to the needs, such as "positive" and "negative" signs representing two plugs 12, positive and negative, or "+" and "-" signs, which may be flexibly set according to the actual needs.

In this embodiment, the header portion of the plug 12 and the conductive core 13 is formed as a common MC4 terminal or a similar MC4 terminal pattern. This structure can be inserted into an external current input terminal, and the head of the conductive core 13 is electrically connected to the plug spring of the external current input terminal. Second, the head of the plug 12 has a sealing feature that mates with an external current input terminal to seal the connection.

In another embodiment, as shown in fig. 14, the plug 12 may be configured without selecting the MC4 terminal or the plug 12 imitating the MC4 terminal style, which may be a separate custom terminal plug.

As shown in fig. 10 and 16, the inner side wall of the first side cover 111 is provided with two first limiting portions 1111 spaced along the length direction thereof, the inner side wall of the second side cover 112 is provided with two second limiting portions 1121 spaced along the length direction thereof, and the two first limiting portions 1111 are disposed opposite to the two second limiting portions 1121 one by one. First, the two first limit portions 1111 can position the positions of the corresponding second connection portions 132 during the process of inserting the two conductive cores 13 into the corresponding plugs 12. Next, when the second side cover 112 is fastened to the first side cover 111, the first limiting portion 1111 and the corresponding second limiting portion 1121 can respectively abut against two opposite sides of the corresponding second connecting portion 132, so as to limit the movement of the second connecting portion 132 along the width direction of the housing 11, and further ensure the relative position of the nut 134 below the second connecting portion 132.

With continued reference to fig. 10 and 16, a third limiting portion 1124 is further disposed on an inner side wall of the second side cover 112, and when the second side cover 112 is fastened to the first side cover 111, two ends of the third limiting portion 1124 along a length direction thereof can respectively abut against ends of the two second connecting portions 132. The third limiting portion 1124 can limit the movement of the two second connecting portions 132 along the length direction of the housing 11, so as to further ensure the relative position of the nut 134 below the second connecting portions 132.

Further, as shown in fig. 15 and 16, two positioning portions 1122 are further disposed on the inner side wall of the second side cover 112 at intervals, each positioning portion 1122 is located below a corresponding second limiting portion 1121, when the second side cover 112 is fastened to the first side cover 111, the nut 134 below the second connecting portion 132 is located above the positioning portion 1122, and the positioning portion 1122 is provided with a positioning hole 1123, so that the positions of the second through hole 1321 and the threaded hole of the nut 134 can be positioned through the positioning hole 1123, thereby ensuring the relative position of the nut 134 below the second connecting portion 132.

Referring to fig. 15 and 16, in one embodiment, a fourth limiting portion 1112 is further disposed on an inner sidewall of the first side cover 111. The fourth limiting portion 1112 can limit the conductive core 13 during the process of inserting the conductive core 13 located at the lower side into the plug 12, so as to ensure the relative position of the nut 134 below the second connecting portion 132.

As shown in fig. 1, in one embodiment, the inverter further includes a temperature sensor 40, and the temperature sensor 40 is located on the circuit board 30 and located at a peripheral side of the second connection portion 132. The temperature sensor 40 may be a thermistor, a thermocouple, etc. for detecting the temperature of the second connection portion 132, and preventing the inverter from heating or even firing due to poor contact caused by insufficient installation.

The present embodiment also provides a photovoltaic system, which includes a photovoltaic panel and the inverter, and the photovoltaic panel and the circuit board 30 of the inverter can be electrically connected through the connection terminal 10. According to the photovoltaic system, through the arrangement of the inverter, the electrical connection between the photovoltaic panel and the circuit board 30 can be realized quickly, so that electric energy transmitted by the photovoltaic panel can be input into a main loop of the inverter, the assembly difficulty and the quality control difficulty are reduced, the assembly time is reduced, the contact resistance is reduced, and the heat loss is reduced.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (14)

1. A connection terminal, characterized by comprising a conductive core (13), the conductive core (13) comprising:

A conductive core body (130), a first end of the conductive core body (130) being configured for mating engagement with a plug (12), a second end of the conductive core body (130) having a contact surface configured to mate with a wiring surface of a circuit board (30) for contact electrical connection with the circuit board (30);

The fixing piece (140) is arranged at the second end of the conductive core main body (130), and the fixing piece (140) is used for fixedly connecting the second end after being attached and contacted with the wiring surface of the circuit board (30).

2. The connection terminal according to claim 1, wherein the fixing member (140) includes a nut (134) and a first fastener (135), the nut (134) is fixed on the surface of the second end of the conductive core body (130), the circuit board (30) is provided with a first through hole (31), the second end of the conductive core body (130) is provided with a second through hole (1321), and the first fastener (135) is connected with the nut (134) through the first through hole (31) and the second through hole (1321) in sequence.

3. The connection terminal according to claim 2, wherein the conductive core main body (130) includes a first connection portion (131), a second connection portion (132) and a transition portion (133), the transition portion (133) is connected between the first connection portion (131) and the second connection portion (132), the first connection portion (131) is cylindrical and is used for being in plug-in fit with the plug (12), the second connection portion (132) is flat and is used for being in contact with the circuit board (30), and the nut (134) is fixed on the surface of the second connection portion (132).

4. A terminal according to claim 3, wherein the transition portion (133) has a rib (1331) formed thereon.

5. A terminal according to claim 1, characterized in that it comprises two of said conductive cores (13).

6. The connecting terminal according to claim 5, further comprising a housing (11) and two plugs (12), wherein the two plugs (12) are arranged on the housing (11) at intervals, the two plugs (12) are communicated with the interior of the housing (11), the two conductive cores (13) are arranged in the housing (11), the first ends of the two conductive core bodies (130) are respectively inserted into the corresponding plugs (12), and the second ends of the two conductive core bodies (130) are exposed out of the housing (11) and are in contact electrical connection with the circuit board (30).

7. The connection terminal according to claim 6, wherein two of the plugs (12) are arranged at intervals along a first direction, two of the conductive cores (13) are arranged at intervals along the first direction, and second ends of two of the conductive core bodies (130) are arranged at intervals along a second direction and are located in the same plane, the first direction being perpendicular to the second direction.

8. The connection terminal according to claim 6, characterized in that the housing (11) comprises:

the conductive core comprises a first side cover (111) and a second side cover (112), wherein the first side cover (111) and the second side cover (112) are buckled to form a containing cavity (114), a notch (115) is formed in one side of the containing cavity (114), two conductive cores (13) are both positioned in the containing cavity (114), and the second end of the conductive core main body (130) can be exposed from the notch (115);

And the end covers (113) are arranged at one ends of the first side cover (111) and the second side cover (112), and the two plugs (12) are arranged on the end covers (113).

9. The connecting terminal according to claim 8, characterized in that a side of the end cap (113) facing away from the plug (12) is provided with a first sealing ring (14), the first sealing ring (14) being arranged circumferentially around the end cap (113).

10. The connecting terminal according to claim 6, wherein a positioning portion (1122) is provided on an inner side wall of the housing (11), a positioning hole (1123) is provided in the positioning portion (1122), and the positioning hole (1123) is used for positioning a nut (134) of the fixing member (140).

11. The connection terminal according to claim 6, wherein one side wall inside the housing (11) is provided with a first limiting portion (1111), the other side wall is provided with a second limiting portion (1121), the first limiting portion (1111) and the second limiting portion (1121) are disposed opposite to each other, and the first limiting portion (1111) and the second limiting portion (1121) can be respectively abutted to opposite sides of the second end of the conductive core body (130).

12. The connecting terminal according to claim 6, wherein a third limiting portion (1124) is provided on an inner side wall of the housing (11), and two ends of the third limiting portion (1124) can be respectively abutted against the second ends of the two conductive core bodies (130).

13. An inverter comprising a case (20), a circuit board (30) and the connection terminal according to any one of claims 1 to 12, wherein the circuit board (30) is located inside the case (20), the connection terminal is detachably connected to the case (20), and the second end of the conductive core main body (130) is in contact electrical connection with the circuit board (30).

14. A photovoltaic system comprising a photovoltaic panel and the inverter of claim 13, said photovoltaic panel being electrically connectable to a circuit board (30) of said inverter via said connection terminals.