CN211508042U - Binding post protection component and photovoltaic module terminal box of photovoltaic module terminal box - Google Patents

Abstract

The utility model relates to a binding post protection component and photovoltaic module terminal box of photovoltaic module terminal box. Binding post protection component includes: a positive terminal guard and a negative terminal guard; the positive terminal block protection part is provided with a conductive bolt fastening cavity; and the negative terminal protection piece is provided with an inserting cavity plugging part. The utility model discloses an anodal binding post protection piece can protect anodal binding post, and negative pole binding post protection piece can protect negative pole binding post, so not only can improve anodal binding post, negative pole binding post's the efficiency of inserting of pulling out, also can avoid photovoltaic array to appear binding post phenomenon of coming off after being connected with outside electrical equipment (for example collection flow box, dc-to-ac converter), avoids local electric leakage, and then avoids causing harm to people or livestock.

Description

Binding post protection component and photovoltaic module terminal box of photovoltaic module terminal box

Technical Field

The utility model relates to a solar energy technical field especially relates to a binding post protection component and photovoltaic module terminal box of photovoltaic module terminal box.

Background

The photovoltaic module junction box is used as a key part of a photovoltaic module for constructing various photovoltaic power generation systems, and is mainly used for leading out electric energy generated by the photovoltaic module to be connected with an external load. The photovoltaic module junction box is provided with a positive terminal and a negative terminal (also called male plug and female plug) so as to connect a plurality of photovoltaic modules into a photovoltaic array and connect the photovoltaic array with external electrical equipment (such as a junction box and an inverter). However, in this period of time between the box is opened to the photovoltaic module terminal box and the wiring, positive and negative binding post exposes in the air, and this makes impurity such as dust, dew adhere to on positive binding post's the surface and enter into negative binding post's inside, causes positive and negative binding post oxidation, and then leads to positive and negative binding post plug difficulty, influences the efficiency of construction.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a terminal protection assembly of a photovoltaic module junction box and a photovoltaic module junction box aiming at the problem that the insertion and extraction of the positive and negative terminals are difficult due to the exposure of the positive and negative terminals in the air.

A terminal protection assembly for a photovoltaic module junction box, the terminal protection assembly comprising: a positive terminal guard and a negative terminal guard;

the positive terminal block protection part is provided with a conductive bolt fastening cavity;

and the protection piece of the negative terminal block is provided with an inserting cavity plugging part.

In one embodiment, a sealing ring receding groove is arranged in the conductive bolt fastening cavity.

In one embodiment, the seal ring relief groove extends to the opening of the conductive plug pin fastening cavity.

In one embodiment, the positive terminal protection piece is further provided with a mounting and taking head;

the outer diameter of the assembling and disassembling head is larger than that of the positive terminal protection piece.

In one embodiment, a conductive pin abdicating groove communicated with the conductive pin fastening cavity is arranged in the assembling and disassembling head;

the diameter of the conductive bolt abdicating groove is larger than that of the conductive bolt fastening cavity.

In one embodiment, the negative terminal protection piece is further provided with a reinforcing part coaxially connected with the plugging cavity blocking part;

the outer diameter of the reinforcing part is smaller than that of the plugging part of the plugging cavity.

In one embodiment, the negative terminal protection member is further provided with a clamping part connected with the plugging cavity plugging part.

In one embodiment, the clamping part is provided with a clamping groove;

the plugging cavity plugging part is arranged at the bottom of the clamping groove.

A photovoltaic module junction box comprises a junction box main body and any one of the junction box protection assemblies;

a conductive plug is arranged on the positive terminal block of the terminal box main body, and an inserting cavity is formed in the negative terminal block of the terminal box main body;

the conductive pin is tightly inserted into a conductive pin fastening cavity of a positive terminal protection piece of the terminal protection assembly;

and the plugging part of the plugging cavity of the negative terminal protection part of the terminal protection component is plugged into the plugging cavity of the negative terminal.

In one embodiment, a step surface is arranged in the plug cavity;

the plugging cavity plugging part can be pressed against the step surface.

In the wiring terminal protection assembly, the conductive pin fastening cavity of the positive wiring terminal protection part can be coated outside the conductive pin of the positive wiring terminal, so that impurities such as external dust, dew and the like can be prevented from being attached to the surface of the conductive pin in the period between box opening and wiring; the plugging cavity plugging part of the negative terminal protection part is inserted into the plugging cavity of the negative terminal, so that impurities such as external dust, dew and the like can be prevented from entering the plugging cavity of the negative terminal in the period between the opening box and the wiring. To sum up, anodal binding post protection piece of binding post protection subassembly can protect anodal binding post, and negative pole binding post protection piece can protect negative pole binding post, so not only can improve anodal binding post, negative pole binding post's the efficiency of inserting of pulling out, also can avoid photovoltaic array to appear binding post phenomenon of coming off after being connected with external electrical equipment (for example collection flow box, dc-to-ac converter), avoids local electric leakage, and then avoids causing harm to people or livestock.

Drawings

Fig. 1 is a schematic structural view of a positive terminal of a photovoltaic module junction box according to an embodiment of the present invention;

fig. 2 is a top view of a positive terminal of a photovoltaic module junction box according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a negative terminal of a junction box of a photovoltaic module according to an embodiment of the present invention;

fig. 4 is a partial cross-sectional view of a negative terminal of a junction box of a photovoltaic module according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a positive terminal protection member according to an embodiment of the present invention;

fig. 6 is a cross-sectional view of a positive terminal guard according to an embodiment of the present invention;

fig. 7 is a cross-sectional view of a negative terminal guard according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a negative terminal protection member according to an embodiment of the present invention.

Wherein the content of the first and second substances,

100-positive terminal guard;

100 a-conductive pin fastening cavity;

100 b-a seal ring abdicating groove;

110-loading and taking out the head;

110 a-conductive pin relief groove;

200-negative terminal guard;

210-a plugging cavity plugging part;

220-a reinforcing part;

230-a gripping portion;

230 a-card slot;

300-positive terminal;

310-conductive pins;

320-a sealing ring;

330-mounting a boss;

340-fixing the bolt;

341-clamping jaw;

400-negative pole connecting terminal;

400 a-a plug cavity;

410-a first plug cavity;

420-a second plugging cavity;

400 b-card slot.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The utility model relates to a photovoltaic module terminal box constructs various photovoltaic power generation system's key parts for photovoltaic module, and mainly used draws the electric energy that photovoltaic module produced to be connected with outside load. The photovoltaic module junction box is provided with a positive terminal 300 (also called a male plug) and a negative terminal 400 (also called a female plug) to connect a plurality of photovoltaic modules into a photovoltaic array and connect the photovoltaic array with external electrical equipment (such as a junction box and an inverter).

As an example, as shown in fig. 1 and 2, a conductive plug 310 and two fixing plugs 340 are disposed on the positive terminal 300, the two fixing plugs 340 are disposed at two sides of the conductive plug 310, and a clamping claw 341 is disposed on each fixing plug 340; as shown in fig. 3 and 4, the negative terminal 400 has an insertion cavity 400a, and the outer wall of the negative terminal 400 is provided with two slots 400b, and the two slots 400b are located at two sides of the insertion cavity 400 a.

In the following, for example, two photovoltaic modules are described, how they are connected by their respective photovoltaic module junction boxes: the positive terminal 300 of the photovoltaic module junction box on one of the photovoltaic modules is electrically connected to the negative terminal 400 of the photovoltaic module junction box on the other photovoltaic module, specifically, the conductive pin 310 of the positive terminal 300 is inserted into the insertion cavity 400a of the negative terminal 400 to realize the electrical conduction of the two terminals, and the two fixing pins 340 of the positive terminal 300 are respectively clamped into the corresponding clamping grooves 400b of the negative terminal 400 through the respective clamping claws 341 to realize the fixation of the positive terminal 300 on the negative terminal 400.

Further, as shown in fig. 1 and 2, as an example, at least one sealing ring 320 is disposed at an axial interval at a tail portion of the conductive pin 310 to achieve sealing between the conductive pin 310 and the plugging chamber 400a, so as to prevent external dust, rain water and other impurities from entering a gap between the electrical pin and the plugging chamber 400 a. The number of the sealing rings 320 may be 2, and is not particularly limited.

Referring to fig. 5 to 8, an embodiment of the present invention provides a terminal protection assembly of a photovoltaic module junction box, which includes: a positive terminal guard 100 and a negative terminal guard 200; the positive terminal guard 100 has a conductive pin fastening cavity 100a formed therein; the negative terminal guard 200 is provided with a plug cavity blocking portion 210.

It should be noted that the outline of the conductive pin fastening cavity 100a is matched with the outline of the conductive pin 310 on the positive terminal 300, so that the positive terminal protection piece 100 can be firmly covered on the conductive pin 310 of the positive terminal 300, thereby protecting the positive terminal 300. The contour of the plugging cavity blocking portion 210 is adapted to the contour of the plugging cavity 400a of the negative terminal 400, so that the plugging cavity blocking portion 210 effectively blocks the plugging cavity 400a of the negative terminal 400, and the protection of the negative terminal 400 is further realized.

When assembling or opening the photovoltaic module line box, with anodal binding post protection piece 100 suit on anodal binding post 300 to and insert negative pole binding post protection piece 200 to negative pole binding post 400 in, specifically be: the conductive pin 310 of the positive terminal 300 is inserted into the conductive pin fastening cavity 100a of the positive terminal guard 100 to cover the conductive pin 310, so that impurities such as external dust, dew and the like can be prevented from being attached to the surface of the conductive pin 310 during the time between box opening and wiring, and the surface of the conductive pin 310 is ensured to be clean; the plugging chamber blocking portion 210 of the negative terminal protection member 200 is inserted into the plugging chamber 400a of the negative terminal 400 to block the plugging chamber 400a, so that foreign substances such as external dust, dew and the like can be prevented from entering the plugging chamber 400a of the negative terminal 400 during the period between opening and wiring.

As can be seen, in the terminal protection assembly as described above, the conductive pin fastening cavity 100a of the positive terminal protection member 100 may be coated outside the conductive pin 310 of the positive terminal 300, so that impurities such as external dust, dew, etc. may be prevented from adhering to the surface of the conductive pin 310 during the time between opening and wiring; the plugging chamber blocking portion 210 of the negative terminal guard 200 is inserted into the plugging chamber 400a of the negative terminal 400, so that foreign substances such as external dust, dew, etc. can be prevented from entering the plugging chamber 400a of the negative terminal 400 during the time between opening and wiring. In summary, the positive terminal protection piece 100 of the terminal protection assembly can protect the positive terminal 300, and the negative terminal protection piece 200 can protect the negative terminal 400, so that the plugging and unplugging efficiency of the positive terminal 300 and the negative terminal 400 can be improved, the phenomenon that the terminals fall off after the photovoltaic array is connected with external electrical equipment (such as a junction box and an inverter) can be avoided, local electric leakage is avoided, and further harm to people or livestock is avoided.

As shown in fig. 5 and 6, in some embodiments of the present invention, a sealing ring receding groove 100b is provided in the conductive plug fastening cavity 100 a. In the period between opening and wiring, if the sealing ring 320 on the positive terminal 300 is exposed to the external environment, it is very easy to expand, and then it cannot effectively run into the plugging cavity 400a on the negative terminal 400 of other photovoltaic module junction boxes or other electrical devices, and it cannot be firmly clamped into the plugging cavity 400a, so that not only the risk of falling off of the positive terminal 300 after being connected with the negative terminal 400 will occur, and further the leakage of electricity will cause danger to the personal safety, but also the circuit contact will be poor, and the bad phenomena of electric arc and heating to burn the terminal will occur, thereby inducing safety accidents, for this, the sealing ring abdicating groove 100b provided by the utility model can accommodate the sealing ring 320 in the protection process of the positive terminal protection piece 100 to the conductive plug 310, so as to prevent the exposure of the sealing ring 320, the sealing ring 320 can be prevented from being extruded, and the sealing ring 320 can be prevented from being deformed due to extrusion and not effectively playing a sealing role.

It should be noted that, in the case where one sealing ring 320 is provided on the conductive pin 310, the depth of the sealing ring receding groove 100b (i.e., the length in the axial direction of the conductive pin 310) is greater than or equal to the thickness of the sealing ring 320, and the width of the sealing ring receding groove 100b (i.e., the length in the direction perpendicular to the axial direction of the conductive pin 310) is greater than or equal to the outer diameter of the sealing ring 320. In the case where a plurality of seal rings 320 are provided on the conductive plug 310, the depth of the seal ring receding groove 100b is greater than or equal to the sum of the distance between the two outermost seal rings 320 and the thickness of the two outermost seal rings 320, and the width of the seal ring receding groove 100b is greater than or equal to the outer diameter of one outermost seal ring 320.

The embodiment of the utility model provides a do not carry out concrete restriction to the degree of depth, the width of sealing washer groove 100b of stepping down, for example the degree of depth of sealing washer groove 100b sets up to 9mm 1.5mm, can specifically be 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 10.5mm etc. and the sealing washer groove 100b of stepping down's width sets up to 4.5 0.5mm, can specifically be 4mm, 4.5mm, 5mm etc. Additionally, the embodiment of the utility model provides a do not carry out specific restriction to diameter, the length in electrically conductive bolt fastening chamber 100a yet, as long as can effectively cladding electrically conductive bolt 310 can, for example, electrically conductive bolt fastening chamber 100 a's length sets up to 25mm 1.5mm, can specifically be 23.5mm, 25mm, 26.5mm etc. and the diameter sets up to 3.5mm 0.5mm, can specifically be 3mm, 3.5mm, 4mm etc.

Alternatively, as shown in fig. 6, the joint between the gasket relief groove 100b and the conductive pin fastening cavity 100a is provided with a chamfered structure, so as to facilitate the processing of the gasket relief groove 100 b.

Further, as shown in fig. 5 and 6, in some embodiments of the present invention, the gasket relief groove 100b extends to an opening of the conductive plug pin fastening cavity 100 a. The opening of the conductive pin fastening cavity 100a is aligned with the conductive pin 310, then the positive terminal protection member 100 is pushed towards the conductive pin 310, and the sealing ring abdicating groove 100b sequentially penetrates through the conductive pin 310 and the sealing ring 320 until abutting against the mounting boss 330 on the positive terminal 300, so that the positive terminal protection member 100 can be prevented from pressing the sealing ring 320 in the mounting process, the sealing ring 320 is protected, and the mounting and dismounting speed of the positive terminal protection member 100 is increased.

As shown in fig. 5 and 6, in some embodiments of the present invention, the positive terminal protection member 100 is further provided with a mounting head 110; the mounting head 110 has an outer diameter larger than that of the positive terminal guard 100. The mounting and dismounting head 110 facilitates mounting and dismounting of the positive terminal protection member 100 by a person or a machine, and improves mounting and dismounting efficiency.

With respect to the specific setting of the outer diameter and the length of the loading and fetching head 110, the embodiment of the present invention is not particularly limited, for example, the outer diameter of the loading and fetching head 110 may be set to 6mm ± 0.5mm, and may specifically be 5.5mm, 6mm, 6.5mm, etc.; the length of the loading head 110 may be set to 2 mm.

Further, as shown in fig. 5 and 6, in some embodiments of the present invention, a conductive pin receding groove 110a communicating with the conductive pin fastening cavity 100a is formed in the mounting head 110; the diameter of the conductive pin relief groove 110a is greater than the diameter of the conductive pin fastening cavity 100 a. If the length of the conductive pin abdicating groove 110a is smaller than that of the conductive pin 310 due to the processing error, the conductive pin abdicating groove 110a can be used for accommodating the end of the conductive pin 310, so as to realize the integral coating of the conductive pin 310 and ensure the effective protection of the conductive pin 310; in addition, the weight of the positive terminal guard 100 can also be reduced. The seal ring relief groove 100b and the attaching/detaching head 110 are provided at both ends of the positive terminal guard 100.

With respect to the positive terminal protection member 100 as described above, the material thereof may be a hard material having a certain deformability, such as a hard plastic, so that not only the conductive pin 310 can be clamped by its own deformability, but also the conductive pin can be easily sleeved on the positive terminal 300 by its own hardness.

As shown in fig. 7 and 8, in some embodiments of the present invention, the negative terminal protection member 200 is further provided with a reinforcing portion 220 coaxially connected to the plugging cavity blocking portion 210; the outer diameter of the reinforcing portion 220 is smaller than the outer diameter of the plugging chamber blocking portion 210. The reinforcing portion 220 of the negative terminal protection member 200 is configured to be inserted into the second insertion cavity 420 of the negative terminal 400, and the insertion cavity blocking portion 210 is configured to be blocked into the first insertion cavity 410 of the negative terminal 400, wherein the first insertion cavity 410 and the second insertion cavity 420 cooperate to form an insertion cavity 400a of the pole terminal, and a diameter of the first insertion cavity 410 is greater than a diameter of the second insertion cavity 420. The reinforcing part 220 may play a role of reinforcement to reduce the risk of the negative terminal guard 200 falling out of the insertion cavity 400a of the negative terminal 400.

It should be noted that, the length of reinforcement portion 220 is less than or equal to the length of first grafting chamber 410, and the degree of existency of reinforcement portion 220 is equal to or slightly less than the diameter of first grafting chamber 410 to make reinforcement portion 220 can insert to first grafting chamber 410 in, the utility model discloses do not carry out specific restriction to the external diameter of reinforcement portion 220, length, for example the external diameter sets up to 9mm 0.5mm, can specifically set up to 8.5mm, 9mm, 9.5mm etc. length sets up to 10 mm.

As shown in fig. 7 and 8, in some embodiments of the present invention, the negative terminal protection member 200 further has a clamping portion 230 connected to the plugging chamber blocking portion 210. The clamping portion 230 is used to clamp the negative terminal guard 200 to the negative terminal 400 to reinforce the negative terminal guard 200.

Further, as shown in fig. 7 and 8, in some embodiments of the present invention, a locking slot 400b is disposed on the fastening part 230; the plugging chamber blocking part 210 is disposed at the bottom of the chucking groove 230 a. The catching groove 230a serves to cover the catching part 230 on the negative terminal 400 in a catching manner. The clamping portion 230 and the reinforcing portion 220 are connected to two opposite walls of the plugging chamber closing portion 210. In addition, the present invention does not specifically limit the depth (i.e., the axial length along the plugging cavity plugging portion 210) and the diameter of the clamping groove 230a, as long as the clamping groove can be securely covered on the negative terminal 400.

With respect to the negative terminal protection member 200 described above, the material thereof may be a soft material having a certain deformability, such as a soft rubber material.

The utility model also provides a photovoltaic assembly junction box, which comprises a junction box main body and any one of the wiring terminal protection assemblies; the positive terminal 300 of the terminal box main body is provided with a conductive plug 310, and the negative terminal 400 of the terminal box main body is provided with an insertion cavity 400 a; the conductive pin 310 is inserted into the conductive pin fastening cavity 100a of the positive terminal guard 100 of the terminal guard assembly; the plug cavity sealing portion 210 of the negative terminal guard 200 of the terminal guard assembly is plugged into the plug cavity 400a of the negative terminal 400.

As can be seen, in the photovoltaic module junction box as described above, the conductive pin fastening cavity 100a of the positive terminal protection member 100 may be coated on the outside of the conductive pin 310 of the positive terminal 300, so that it is possible to prevent impurities such as external dust, dew, etc. from adhering to the surface of the conductive pin 310 during the time between opening and wiring; the plugging chamber blocking portion 210 of the negative terminal guard 200 is inserted into the plugging chamber 400a of the negative terminal 400, so that foreign substances such as external dust, dew, etc. can be prevented from entering the plugging chamber 400a of the negative terminal 400 during the time between opening and wiring. To sum up, the positive terminal protection piece 100 of the photovoltaic module junction box can protect the positive terminal 300, and the negative terminal protection piece 200 can protect the negative terminal 400, so that the plugging and unplugging efficiency of the positive terminal 300 and the negative terminal 400 can be improved, the phenomenon that the terminals fall off after the photovoltaic array is connected with external electrical equipment (such as a junction box and an inverter) can be avoided, local electric leakage is avoided, and further harm to people or livestock is avoided.

In some embodiments of the present invention, as shown in fig. 4, a step surface is disposed in the plugging chamber 400 a; the plugging cavity blocking part 210 can be pressed against the step surface. It will be appreciated that the junction between the first plug cavity 410 and the second plug cavity 420 constitutes the step face. In this way, the dustproof and waterproof effects of the plug cavity blocking portion 210 on the plug cavity 400a can be increased.

It should be noted that, the external diameter of grafting chamber shutoff portion 210, length equal to or slightly are greater than the diameter, the degree of depth of first grafting chamber 410 respectively to realize effectively extruding with the step face in grafting chamber 400a, the utility model discloses do not carry out specific restriction to grafting chamber shutoff portion 210's external diameter, length, for example, grafting chamber shutoff portion 210's external diameter sets up to 10.5mm 0.5mm, can specifically be 10mm, 10.5mm, 11mm, and grafting chamber shutoff portion 210's length sets up to 7 mm 0.5mm, can specifically be 6.5mm, 10.5, 11mm etc..

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a binding post protection component of photovoltaic module terminal box which characterized in that, binding post protection component includes: a positive terminal guard (100) and a negative terminal guard (200);

the positive terminal protection piece (100) is provided with a conductive bolt fastening cavity (100 a);

the negative terminal protection piece (200) is provided with an insertion cavity plugging part (210).

2. The terminal protection assembly according to claim 1, wherein a gasket relief groove (100b) is provided in the conductive pin securing cavity (100 a).

3. The terminal protection assembly according to claim 2, wherein the gasket relief groove (100b) extends to an opening of the conductive pin securing cavity (100 a).

4. The terminal guard assembly of claim 1, wherein the positive terminal guard (100) further includes a pick-up head (110);

the mounting head (110) has an outer diameter larger than an outer diameter of the positive terminal guard (100).

5. The terminal protection assembly according to claim 4, wherein a conductive pin relief groove (110a) communicated with the conductive pin fastening cavity (100a) is formed in the fitting head (110);

the diameter of the conductive pin relief groove (110a) is greater than that of the conductive pin fastening cavity (100 a).

6. The terminal protection assembly according to claim 1, wherein the negative terminal protection member (200) is further provided with a reinforcing portion (220) coaxially connected with the plug cavity blocking portion (210);

the outer diameter of the reinforcing part (220) is smaller than that of the plugging cavity plugging part (210).

7. The terminal protection assembly according to claim 1, wherein the negative terminal protection member (200) is further provided with a clamping portion (230) connected to the plugging chamber blocking portion (210).

8. The terminal guard assembly according to claim 7, wherein the clamping portion (230) is provided with a clamping groove (230 a);

the plugging cavity plugging part (210) is arranged at the bottom of the clamping groove (230 a).

9. A photovoltaic module junction box comprising a junction box main body and the terminal protection assembly of any one of claims 1-8;

a conductive plug (310) is arranged on a positive terminal (300) of the terminal box main body, and an insertion cavity (400a) is formed in a negative terminal (400) of the terminal box main body;

the conductive pin (310) is inserted into a conductive pin fastening cavity (100a) of a positive terminal guard (100) of the terminal guard assembly;

the plug cavity blocking part (210) of a negative terminal protection piece (200) of the terminal protection assembly is plugged into the plug cavity (400a) of the negative terminal (400).

10. The photovoltaic module junction box according to claim 9, wherein a stepped surface is provided in the plugging chamber (400 a);

the plugging cavity plugging part (210) can be pressed against the step surface.

Images