WO2016188080A1

WO2016188080A1 - Junction box for solar photovoltaic assembly

Info

Publication number: WO2016188080A1
Application number: PCT/CN2015/096370
Authority: WO
Inventors: 邵名巍; 王骏
Original assignee: 常熟市冠日新材料有限公司
Priority date: 2015-05-28
Filing date: 2015-12-04
Publication date: 2016-12-01
Also published as: CN104901622A

Abstract

A junction box for a solar photovoltaic assembly, which falls within the technical field of solar battery assemblies. The junction box comprises a box body (1), an electrical connection mechanism (2) provided in a box body cavity (11) and on a bottom plate (111) of the box body cavity, a bypass diode (3) provided in the box body cavity (11), corresponding to an upper side of the electrical connection mechanism (2) and electrically connected to the electrical connection mechanism (2), and a box cover (4) that is fitted to the box body (1) and is used to shelter the electrical connection mechanism (2) and the bypass diode (3) which are provided in the box body cavity (11), characterized in that: the number of the electrical connection mechanisms (2) and the bypass diodes (3) provided in the box body cavity (11) is one respectively, and in a used state, electrical connection mechanisms (2) in box body cavities (11) of two adjacent box bodies (1) are electrically connected to each other via a pair of bus bars (5) led into the box body cavities (11). A heat dissipation effect of the bypass diode (3) is enabled to satisfy the requirements of the development of a solar photovoltaic battery towards a larger power and a higher current, and a conflict between the heat dissipation of the box body (1) and the bypass diode (3) using a large power and a high current can be resolved. The overall structure is simple, and thus can be manufactured conveniently and assembled quickly.

Description

Junction box for solar photovoltaic modules

Technical field

The invention belongs to the technical field of solar cell modules, and in particular relates to a junction box for a solar photovoltaic module.

Background technique

The junction box of the solar photovoltaic module is an important component of the output solar power source, and is a transition device for connecting the solar battery lead wire with the external lead wire, usually by a cover, a box base (also called a box body), and a bypass disposed in the box seat. Diode, wire and cable and conductive connection mechanism. The aforementioned bypass diode functions to avoid reverse charging and damage the solar photovoltaic cell and prevent the normal operation of the entire solar photovoltaic cell module due to a short circuit of a solar photovoltaic cell.

As is known in the industry, when solar photovoltaic power is generated, current will flow through the bypass diode provided in the box seat to make the bypass diode heat. Therefore, the solar photovoltaic module cable box must have a heat dissipation effect, so that The heat generated by the bypass diode is radiated to the outside. Thus, in the published Chinese patent literature, there is no shortage of technical solutions aimed at effectively dissipating the heat generated by the bypass diode to the outside to ensure the normal operation of the bypass diode. Typical examples are: CN201639227U (junction box housing for solar photovoltaic modules), CN101944546B (solar photovoltaic module junction box), CN101442280A (solar photovoltaic module junction box), CN2716748Y (modified structure of solar module junction box), CN101138098A (solar module Junction box of output line and installation method of the junction box), CN200941388Y (solar photovoltaic power generation component junction box), CN201075856Y (new solar photovoltaic metal junction box), CN101286626A (solar photovoltaic metal junction box) and CN101459392A (for solar photovoltaic cell system) Junction box), and so on.

By reading the patent documents not limited to the above, it can be known that the heat dissipation effect of the junction box has a direct influence on the power level of the bypass diode to be selected, in particular, the better the heat dissipation effect of the junction box, then the selection A relatively large bypass diode and vice versa.

Further, as is known in the industry, solar cells are gradually developing toward high-power and high-current, and in accordance with this, the aforementioned bypass diodes are also developed in a direction of high power. Therefore, if the heat dissipation effect of the junction box cannot meet the heat dissipation requirement of the high-power bypass diode, it will undoubtedly hinder the progress of the solar cell to a large power and large current.

Although it is not limited to the junction box involved in the patent solution exemplified above, it has positive significance for improving the heat dissipation effect, but it is still insufficient to meet the heat dissipation requirement of the bypass diode under high power and high current working conditions, because people dock The design idea of the wire box has never been free from the shackles of the traditional design concept. The so-called traditional design concept mainly manifests in the following factors: one is to select the material for making the junction box; the other is to form a reasonable heat dissipation on the junction box as much as possible. Channel (including vents); third is to explore the way and location of the three bypass diodes in the junction box. However, the repeated experiments conducted by the applicant show that if the three factors are not rid of the above-mentioned three factors, the junction box will have a limited diffusion of heat radiated by the three bypass diodes during the work, and the result is impossible. Adapt to the requirements of solar cells to develop in the direction of high power and high current. Therefore, the problem of finding a reasonable balance between the excellent heat dissipation of the junction box and the current high-power current of the solar cell has long plagued the industry, and the patent and non-patent literature published to date. None of the technical inspirations that can be used for reference.

In view of the above prior art, the applicant has made active and beneficial exploration and design, and finally formed the technical solution to be introduced below, and it has been proved to be feasible by simulation test under the taking of confidentiality measures.

Summary of the invention

The object of the present invention is to provide a solar energy for solar energy that can significantly improve the heat dissipation effect on the bypass diode, thereby adapting the bypass diode to the high-power and high-current requirements of the solar cell and facilitating the simplification of the structure. Junction box for photovoltaic modules.

The object of the present invention is to provide a junction box for a solar photovoltaic module, comprising a casing, an electrical connection mechanism disposed in the casing cavity of the casing and located on the casing cavity of the casing cavity, and is also disposed in the same a bypass diode in the body cavity and electrically connected to the electrical connection mechanism above the electrical connection mechanism and a box for mating with the housing for the electrical connection mechanism and the bypass diode disposed in the housing cavity a cover, wherein: the number of the electrical connection mechanism and the bypass diode disposed in the casing cavity of the casing is one, and the electrical connection in the casing cavity of two adjacent casings in use state The mechanism is electrically connected to each other by a pair of bus bars that are introduced into the cavity of the casing.

In a specific embodiment of the present invention, a bus bar introduction cavity for communicating the cavity of the casing with the outside is opened on the front side of the bottom plate of the casing corresponding to the casing cavity, and the bus bar is introduced into the cavity. The casing cavity bottom plate forms a half-cut box cavity bottom plate, and the pair of bus bars are electrically connected to the electrical connection mechanism from the bus bar introduction cavity into the casing cavity, and the bypass diode has a pin and an electrical connection. The foot, the pin and the electrical connection leg are electrically connected to the electrical connection mechanism.

In another specific embodiment of the present invention, a first electrical connection plate positioning post and a second electrical connection plate positioning post protruding from an upper surface of the bottom surface of the casing cavity are formed on the bottom plate of the casing cavity; Electrical connection mechanism a first electrical connection board and a second electrical connection board, and a first electrical connection board positioning hole is formed on the first electrical connection board and at a position corresponding to the first electrical connection board positioning post, on the second electrical connection board And a second electrical connection board positioning hole is defined at a position corresponding to the second electrical connection board positioning post, the first electrical connection board positioning hole is matched with the first electrical connection board positioning column, and the second electrical connection board positioning hole and the first The second connecting plate is matched with the positioning post; the pin of the bypass diode is electrically connected to the first electrical connecting plate, and the electrical connecting leg of the bypass diode is electrically connected to the second electrical connecting plate; One of the pair of bus bars is electrically connected to the first electrical connection board, and the other of the pair of bus bars is electrically connected to the second electrical connection board.

In still another specific embodiment of the present invention, a first bus bar electrical connection leg is formed at an end of the first electrical connection plate toward the bus bar introduction cavity, and the first bus bar electrical connection leg faces the confluence The strip is introduced into the cavity, and one of the pair of bus bars is electrically connected to the first bus bar electrical connection leg; at the end of the second electrical connection plate that is introduced into the cavity toward the bus bar Forming a second bus bar electrical connection leg, the second bus bar electrical connection leg extending toward the bus bar introduction cavity and corresponding to the first bus bar electrical connection leg, the other of the pair of bus bars The bus bar is electrically connected to the second bus bar electrical connection leg.

In still another specific embodiment of the present invention, a first bus bar electrical connection hole is defined in the first bus bar electrical connection leg, and a first one is formed on the second bus bar electrical connection leg. a two-bar electrical connection hole, wherein one of the pair of bus bars is electrically connected to the first bus bar electrical connection leg at a position corresponding to the first bus bar electrical connection hole, and the pair of bus bars are The other bus bar is electrically connected to the second bus bar electrical connection leg at a position corresponding to the second bus bar electrical connection hole.

In still another specific embodiment of the present invention, an electrically isolated flange is formed at a centered position of the side of the casing cavity toward the busbar introduction cavity, and the busbar introduction cavity faces the bottom of the casing cavity. An electrical spacer is formed on one side and at a position corresponding to the electrical isolation flange, and the electrical isolation flange and the electrical spacer form a T-shaped position relationship with each other.

In still another specific embodiment of the present invention, a casing buckle is formed on the outer walls of the left and right sides of the casing and at positions corresponding to each other, and on the inner walls of the left and right sides of the casing. And each of the positions corresponding to the buckle of the box body is configured with a cover card foot that cooperates with the buckle of the box body, and a through box is extended at the bottom of the box body and around the periphery of the box body. At the side of the drain stack, a gap is maintained between the bottom surface of the lid of the lid and the edge of the drain drain of the box.

In still another specific embodiment of the present invention, a cable introduction positioning seat extends at a position of a lower left corner of the casing, and a cable introduction positioning cavity of the cable introduction positioning seat communicates with the casing cavity, and The current a cable clamp is disposed in the positioning cavity; a positioning cover is extended at a lower left corner of the cover and at a position corresponding to the cable introduction positioning seat, and the positioning cover and the cable are introduced into the positioning seat by the positioning cover The cable is introduced into the positioning cavity for the cooperation.

In still another specific embodiment of the present invention, each of the left and right chamber walls of the casing cavity and the position corresponding to the bus bar introduction cavity are respectively formed with a glue-filling reference protruding from the surface of the cavity wall. Logo flange.

In still another specific embodiment of the present invention, a cable defining flange is formed on a bottom wall of the cavity into which the cable is introduced into the positioning cavity, and the cable clamp has a cable. The pressure block cavity is formed with a cable limiting flange protruding from the surface of the top wall of the cavity on the top wall of the cavity of the cable block cavity.

The technical solution provided by the invention provides an electric connection mechanism and a bypass diode in a box body of a casing, so that the number of the casings seems to be increased, but the heat dissipation effect of the bypass diode can satisfy the solar photovoltaic cell direction. The requirement of high power and large current direction development solves the contradiction between the heat dissipation of the box body and the bypass diode with high power and large current. Because the overall structure is concise, it can be easily manufactured and assembled quickly.

DRAWINGS

Figure 1 is a block diagram of an embodiment of the present invention.

2 is a schematic view showing a pair of bus bars electrically connecting electrical connection mechanisms located in the casing cavities of two adjacent casings.

Figure 3 is a structural view of the casing between the two casings shown in Figure 2;

Figure 4 is a schematic view of the cable clamp of Figure 1 after being turned 180°.

detailed description

The Applicant will be described in detail below with reference to the accompanying drawings, but the description of the embodiments is not a limitation of the technical solutions, any basis. The inventive concept, rather than the actual changes, should be considered as the scope of the invention.

In the following description, the concepts of directionality (or orientation) involving up, down, left, right, front and back are all in terms of the positional state of the picture being described, and the purpose is to facilitate the public. It is understood that it is not to be construed as a limitation of the invention.

Referring to FIG. 1 and FIG. 2, the casing 1 is provided, and the electrical connection mechanism 2 disposed in the casing cavity 11 of the casing 1 and located on the casing cavity 111 of the casing cavity 11 is also disposed in the casing cavity 11. And a bypass diode 3 electrically connected to the electrical connection mechanism 2 above the electrical connection mechanism 2 and a matching with the casing 1 for shielding the electrical connection mechanism 2 and the bypass diode 3 provided in the casing chamber 11. Cover 4 for protection.

As shown in FIG. 1 and FIG. 2, the aforementioned bypass diode 3 is soldered and fixed to the electrical connection mechanism 2. Since the functions of the bypass diode 3 and the electrical connection mechanism 2 and the respective working principles are well known in the art, for example, reference can be made to the applicant. The patent documents mentioned in the above background art column are therefore not described again.

The technical point of the technical solution provided by the present invention is that the number of the electrical connection mechanism 2 and the bypass diode 3 disposed in the casing cavity 11 of the foregoing casing 1 is one, and in the state of use, the two adjacent casings 1 are The electrical connection mechanism 2 in the casing chamber 11 is electrically connected to each other by a pair of bus bars 5 (shown schematically in Fig. 2) introduced into the casing chamber 11. It can be seen that the number of the casings 1 in the actual use state of the present invention is three, and it seems that the junction box of the prior art is reduced to zero in order to increase the number of the casings 1 and possibly increase the manufacturing. Cost, but since the structure of the casing 1 becomes significantly simpler and the volume is significantly reduced, the increase in the number of the casings 1 is caused by the fact that the three bypass diodes 3 are disposed in one casing 1 in comparison with the prior art. The present invention has the advantage that the prior art cannot be compared in terms of the cost of frequently replacing the entire casing 1 and, to a certain extent, the present invention overcomes the design bias of the prior art because The technical effects it produces are unpredictable in the prior art.

Referring to FIG. 1, a bus bar introduction cavity 112 for communicating the casing cavity 11 with the outside is formed at a position corresponding to the front side of the casing cavity bottom plate 111 of the casing chamber 11, and the bus bar is introduced into the cavity 112. The casing cavity bottom plate 111 is formed into a half-cut box cavity bottom plate (ie, a half-width bottom plate), and the pair of bus bars 5 are introduced into the casing cavity 11 from the bus bar introduction cavity 112 to be electrically connected to the electrical connection mechanism 2, and the bypass diode 3 is There are a pin 31 and an electrical connecting leg 32, both of which are electrically connected to the electrical connection mechanism 2.

Preferably, a first electrical connection plate positioning post 1111 and a second electrical connection plate positioning post 1112 protruding from the upper surface of the casing cavity bottom plate 111 are formed on the foregoing casing cavity bottom plate 111; the aforementioned electrical connection mechanism 2 includes The first electrical connection board 21 (also referred to as a metal conductive sheet, the same applies hereinafter) and a second electrical connection board 22 (also referred to as a metal conductive sheet, the same applies hereinafter) on the first electrical connection board 21 and corresponding to the first A first electrical connection board positioning hole 211 is defined at a position of the electrical connection board positioning post 1111, and a second electrical connection board is disposed on the second electrical connection board 22 and at a position corresponding to the second electrical connection board positioning post 1112. The hole 221, the first electrical connection plate positioning hole 211 is matched with the first electrical connection plate positioning post 1111 and is positioned on the first electrical connection plate positioning post 1111 by thermal fusion welding, and the second electrical connection plate positioning hole 221 and the second The two electrical connection plate positioning posts 1112 are matched and positioned on the second electrical connection plate positioning post 1112 by heat fusion welding; one of the pair of bus bars 5 is electrically connected to the first electrical connection plate 21 Connection, and a pair of bus bars 5 Another bus bars electrically connected to the second link plate 22 electrically. The aforementioned pin 31 of the bypass diode 3 is electrically connected to the first electrical connection plate 31 by soldering, and the aforementioned electrical connection leg 32 is also electrically connected to the second electrical connection plate 22 by soldering.

Preferably, at the end of the first electrical connection plate 21 facing the bus bar introduction cavity 112, a first bus bar electrical connection leg 212 is formed, and the first bus bar electrical connection leg 212 is directed toward the bus bar into the cavity 112. Extendingly, one of the pair of bus bars 5 is electrically connected to the first bus bar electrical connection leg 212; at the end of the second electrical connection plate 22 facing the bus bar introduction cavity 112, a second confluence is formed. An electrical connection leg 222 extending in a direction toward the bus bar introduction cavity 112 and corresponding to the first bus bar electrical connection leg 212, the other of the aforementioned pair of bus bars 5 confluent The strip is electrically connected to the second bus bar electrical connection leg 222.

A first bus bar electrical connection hole 2121 is defined in the first bus bar electrical connecting leg 212, and a second bar electrical connection hole 2221 is defined in the second bus bar electrical connecting leg 222. The foregoing one One of the bus bars 5 is electrically connected to the first bus bar electrical connection leg 212 at a position corresponding to the first bus bar electrical connection hole 21121, and the other of the pair of bus bars 5 is at The position corresponding to the second bus bar electrical connection hole 2221 is electrically connected to the second bus bar electrical connection leg 222.

Referring to FIG. 1, an electrically isolated flange 113 is formed at a centered position of the side of the casing cavity bottom plate 111 facing the bus bar introduction cavity 112, and at the side of the bus bar introduction cavity 112 facing the casing cavity bottom plate 111 and at Corresponding to the position of the electrical isolation flange 113, an electrical isolation strip 1121 is formed. The electrical isolation flange 113 and the electrical isolation strip 1121 form a T-shaped relationship with each other, that is, the electrical isolation strip 1121 is perpendicular to the electrical isolation flange 113, but both not in contact. The electrically isolating flange 113 and the electrical insulation strip 1121 can prevent a pair of bus bars 5 from being able to cause abnormal electrical contact to cause a short circuit.

As shown in Fig. 1, on the outer wall of the left and right sides of the casing 1 and at positions corresponding to each other, a casing buckle 12 is formed, and on the inner wall on the left and right sides of the casing 4 and in correspondence with the casing card The positions of the buckles 12 each constitute a cover foot 41 which cooperates with the case buckle 12. In addition, at the bottom of the casing 1 and around the periphery of the casing 1 there is a through-box draining stack 13 extending between the lid bottom surface 42 of the lid 4 and the casing drain stack 13 With a gap, the box drain side 13 can also be referred to as a box drain skirt, which both contributes to ventilation and facilitates the aforementioned entry between the bottom surface 42 of the lid and the drain side 13 of the box. The water in the gap (mainly rainwater generated by precipitation weather) is quickly vented and vaporized, and a tool such as a screwdriver is used to open the lid 4 at a position corresponding to the gap.

A cable introduction positioning seat 14 is extended at a position in the lower left corner of the casing 1. The cable introduction positioning cavity 141 of the cable introduction positioning seat 14 communicates with the aforementioned casing cavity 11 and is disposed in the cable introduction positioning cavity 141. There is a cable clamp 142; there is a certain extension in the lower left corner of the cover 4 and at a position corresponding to the cable introduction positioning seat 14. The seat cover 43 shields the cable introduction positioning cavity 141 by the cooperation of the positioning seat cover 43 and the cable introduction positioning seat 14. In the state of use, the cable clamp 142 is fixed by ultrasonic welding to the cable introduction positioning cavity 141.

Preferably, on the left and right chamber walls of the foregoing casing cavity 11 and at positions corresponding to the bus bar introduction cavity 112, a glue-filling reference mark flange 114 protruding from the surface of the cavity wall is formed, the glue-filling reference mark The upper surface of the flange 114 is slightly lower than the upper plane of the cavity of the casing chamber 11, preferably less than 0.3-0.8 mm, preferably 0.4-0.6 mm, more preferably 0.5 mm. In the present embodiment, the upper surface of the glue-filling reference mark flange 114 is lower than the cavity of the casing cavity 11 by 0.5 mm, thereby avoiding the blindness when pouring the sealant into the casing cavity 11, because excessive over-filling The glue causes unnecessary waste, which in turn affects the protection effect of the aforementioned bypass diode 3 provided in the casing body 11.

Referring to FIG. 4 and in conjunction with FIG. 1 and FIG. 2, a cable defining flange 1411 is formed on the bottom wall of the cable introduction positioning cavity 141 to protrude from the surface of the cavity bottom wall. The cable clamp 142 has a cable. The block cavity 1421 and the wall of the cavity of the cable block cavity 1421 are formed with a cable limiting flange 14211 (shown in detail in FIG. 4) protruding from the surface of the cavity top wall. The function of the aforementioned cable defining flange 1411 and the cable limiting flange 14211 is to increase the pulling force on the cable 6 shown in FIG. 2, preventing the cable 6 from easily breaking free from the casing 1.

As can be seen from the above description by the applicant, since the number of the casings 1 is three in actual use, and the positional state shown in FIG. 2 is taken as an example, the left, the middle, and the right are arranged (may also be upper, middle, and lower). Arrangement), the structure of each of the left and right boxes is the same, only the position of the cable introduction positioning seat 14 is different, so that the cable introduction positioning seat 14 of each of the left and right boxes 1 is respectively provided with an electrical connection. The mechanism 2 is electrically connected to the cable 6, and the cable 6 is defined by the aforementioned cable clamp 142 and soldered to the first electrical connection plate 21. In addition, in order to facilitate the wiring, as a preferred solution, the power supply mark 431 indicating the positive and negative power supply, and the two cover 4 on the left and right sides are respectively designed on the surfaces of the positioning cover 43 of the cover 4 of the left and right sides. The power supply mark 431 on the locator cover 43 is different. When one is the power supply negative mark (-), the other is the power positive mark (+), and vice versa.

Referring to FIG. 3 and in conjunction with FIG. 2, since a box 1 in the middle of FIG. 3 does not need to connect the cable 6, the cable introduction positioning seat 14 is omitted, and the corresponding cover 4 also eliminates the corresponding positioning seat. The cover 43 is the same, and the rest of the structure is the same as that shown in FIG.

When assembling, the bypass diode 3 is first electrically connected to the electrical connection mechanism 2, and then the cable 6 and the pair of bus bars 5 are electrically connected to the electrical connection mechanism 2, and then the sealing body is potted to the casing cavity 11 after the filling is completed. Then, the cover 4 is placed on the cover 1 .

Claims

A junction box for a solar photovoltaic module, comprising a casing (1), an electrical connection disposed in the casing cavity (11) of the casing (1) and located on the casing cavity bottom plate (111) of the casing cavity (11) a mechanism (2), a bypass diode (3) also disposed in the casing cavity (11) and electrically connected to the electrical connection mechanism (2) above the electrical connection mechanism (2), and the casing (1) a matching cover (4) for shielding the electrical connection mechanism (2) and the bypass diode (3) disposed in the casing cavity (11), characterized in that: the casing (1) is disposed The number of the electrical connection mechanism (2) and the bypass diode (3) in the casing chamber (11) is one, and in the state of use, in the casing chamber (11) of two adjacent casings (1) The electrical connection mechanism (2) is electrically connected to each other by a pair of bus bars (5) introduced into the casing cavity (11).
A junction box for a solar photovoltaic module according to claim 1, wherein a front side of the casing cavity bottom plate (111) corresponding to said casing cavity (11) is provided with a casing cavity (11) The externally connected bus bar is introduced into the cavity (112), and the bus bar cavity bottom plate (111) forms a half-cut box cavity bottom plate by the bus bar introduction cavity (112), and the pair of bus bars (5) are from the confluence The strip introduction cavity (112) is electrically connected to the electrical connection mechanism (2), and the bypass diode (3) has a pin (31) and an electrical connection leg (32), and the tube is introduced into the cavity (11). Both the foot (31) and the electrical connection leg (32) are electrically connected to the electrical connection mechanism (2).
A junction box for a solar photovoltaic module according to claim 1 or 2, wherein a first electric body is formed on the bottom surface (111) of the casing chamber to protrude from the upper surface of the bottom plate (111) of the casing chamber. a connecting plate positioning post (1111) and a second electrical connecting plate positioning post (1112); the electrical connecting mechanism (2) comprises a first electrical connecting plate (21) and a second electrical connecting plate (22), a first electrical connection board positioning hole (211) is opened on the first electrical connection board (21) and at a position corresponding to the first electrical connection board positioning post (1111), on the second electrical connection board (22) and at A second electrical connection board positioning hole (221) is defined at a position corresponding to the second electrical connection board positioning post (1112), and the first electrical connection board positioning hole (211) is matched with the first electrical connection board positioning post (1111). The second electrical connection board positioning hole (221) is matched with the second electrical connection board positioning post (1112); the bypass diode (3) of the bypass diode (3) and the first electrical connection board (21) Electrically connected, and the electrical connection leg (32) of the bypass diode (3) is electrically connected to the second electrical connection plate (22); one of the pair of bus bars (5) is converged The strip (5) is electrically connected to the first electrical connection plate (21), and the other of the pair of bus bars (5) is electrically connected to the second electrical connection plate (22).
A junction box for a solar photovoltaic module according to claim 3, wherein a first bus bar electrical connection is formed at one end of said first electrical connection plate (21) toward said bus bar introduction cavity (112) a leg (212), the first bus bar electrical connection leg (212) extends toward the bus bar introduction cavity (112), one of the pair of bus bars (5) and the first The bus bar electrical connecting leg (212) is electrically connected; a second bus bar electrical connecting leg (222) is formed at one end of the second electrical connecting plate (22) facing the bus bar introducing cavity (112), the second The bus bar electrical connection leg (222) extends toward the bus bar introduction cavity (112) and corresponds to the first bus bar electrical connection leg (212), and the other of the pair of bus bars (5) The strip is electrically connected to the second bus bar electrical connection leg (222) Pick up.
The junction box for a solar photovoltaic module according to claim 4, wherein a first bus bar electrical connection hole (2121) is defined in the first bus bar electrical connecting leg (212), and A second busbar electrical connection hole (2221) is defined in the second bus bar electrical connecting leg (222), and one of the pair of bus bars (5) corresponds to the first bus bar The position of the electrical connection hole (2121) is electrically connected to the first bus bar electrical connection leg (212), and the other of the pair of bus bars (5) corresponds to the second bus bar electrical connection hole (2221) The position is electrically connected to the second bus bar electrical connection leg (222).
A junction box for a solar photovoltaic module according to claim 2, wherein an electrically isolated flange is formed at a centered position of the side of the casing cavity bottom plate (111) toward the bus bar introduction cavity (112). (113), and an electrical spacer (1121), an electrical isolation flange, is formed on a side of the bus bar introduction cavity (112) facing the chassis cavity bottom plate (111) and at a position corresponding to the electrical isolation flange (113) ( 113) and the electrical isolation sheets (1121) form a T-shaped positional relationship with each other.
The junction box for a solar photovoltaic module according to claim 1, characterized in that a box body buckle (12) is formed on each of the left and right outer walls of the casing (1) and at positions corresponding to each other. On the inner wall of the left and right sides of the cover (4) and at positions corresponding to the buckles (12) of the casing, a cover leg (41) is formed, the cover leg (41) and the cover The buckle (12) cooperates with a through-box draining stack edge (13) extending at the bottom of the casing (1) and around the periphery of the casing (1), the casing of the casing (4) A gap is maintained between the bottom surface (42) and the box drain side (13).
The junction box for a solar photovoltaic module according to claim 1, characterized in that a cable introduction positioning seat (14) is extended at a position in a lower left corner of the casing (1), and the cable is introduced into the positioning seat (14). The cable introduction positioning cavity (141) is in communication with the casing cavity (11), and a cable clamp (142) is disposed in the current introduction positioning cavity (141); in the cover (4) And a positioning seat cover (43) extending at a position corresponding to the cable introduction positioning seat (14), and the cable is introduced by the cooperation of the positioning seat cover (43) and the cable introduction positioning seat (14) The positioning cavity (141) is shielded.
A junction box for a solar photovoltaic module according to claim 2, characterized in that it is formed on the left and right chamber walls of said box chamber (11) and at positions corresponding to said bus bar introduction chambers (112) There is a glue reference mark flange (114) protruding from the surface of the cavity wall.
A junction box for a solar photovoltaic module according to claim 8, wherein a cable defining flange is formed on a bottom wall of the cavity of the cable introduction positioning cavity (141) to protrude from a surface of the cavity bottom wall. (1411), the cable clamp (142) has a cable clamp cavity (1421), and a cable limit protruding from a surface of the ceiling wall is formed on a ceiling wall of the cable clamp cavity (1421). Flange (14211).