CN216490388U

CN216490388U - Intelligent junction box capable of reducing hot spot effect

Info

Publication number: CN216490388U
Application number: CN202122039200.6U
Authority: CN
Inventors: 李纪伟; 王永; 巴义敏; 王海涛; 吕井成; 冯丹丹; 章含
Original assignee: Tangshan Haitai New Energy Technology Co Ltd
Current assignee: Tangshan Haitai New Energy Technology Co Ltd
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2022-05-10
Anticipated expiration: 2031-08-27

Abstract

The utility model relates to the technical field of photovoltaic module junction boxes, in particular to an intelligent junction box capable of reducing hot spot effect. The photovoltaic module comprises a housin, the circuit board, the one end of circuit board is provided with the wiring end of converging that is no less than two, the other end of circuit board is provided with the output cable, two adjacent wiring ends of converging are connected with the source electrode and the drain electrode of MOS pipe respectively, the grid connection control unit of MOS pipe, the control unit is connected with the monitoring unit, the monitoring unit is used for monitoring positive negative pole voltage of single subassembly, generate power often and terminal box temperature, the control unit electric connection has zigbee communication module, zigbee communication module is used for sending photovoltaic module's operating condition for total control unit. The heating energy consumption of the MOS tube is far lower than that of the diode under the same condition, the reverse leakage current of the MOS tube is greatly reduced compared with that of the diode during normal work, and the power generation efficiency of the photovoltaic module is improved to a certain extent due to the reduction of the energy consumption in the whole process.

Description

Intelligent junction box capable of reducing hot spot effect

Technical Field

The utility model relates to the technical field of photovoltaic module junction boxes, in particular to an intelligent junction box capable of reducing hot spot effect.

Background

In order to prevent the solar cell from being damaged by serious heating due to the fact that a part of the photovoltaic modules become loads because of being not illuminated under strong light due to shading, a bypass diode needs to be connected in parallel in each photovoltaic module unit. The two photovoltaic module units are connected in series to form a power generation photovoltaic panel assembly, and when the cell sheet works normally, the bypass diode is cut off in a reverse direction, so that no effect is generated on a circuit; if a battery piece group connected with the bypass diode in parallel has a battery piece which does not normally work, the current of the whole circuit is determined by the battery piece with the minimum current, the current is determined by the shielding area of the battery piece, if the reverse bias voltage is higher than the minimum voltage of the battery piece, the bypass diode is conducted, and at the moment, the battery piece which does not normally work is short-circuited.

However, the existing bypass diode has large heat productivity and is easy to damage, and the power generation amount of other photovoltaic modules connected in series with the bypass diode is reduced due to the reduction of current, so that the mismatch between the photovoltaic module of the string and other strings is caused, and the overall power generation efficiency of a photovoltaic system is seriously influenced; meanwhile, when the existing photovoltaic assembly breaks down, the power generation efficiency of the whole photovoltaic system is not easily discovered and influenced in time, when the junction box breaks down, the junction box is difficult to replace due to the fact that glue pouring processing is integrally adopted, and the whole power generation assembly needs to be replaced, so that great waste is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems and provides an intelligent junction box for reducing the hot spot effect, which is characterized in that the found state of a photovoltaic component unit is detected at any time by matching a control unit with an MOS (metal oxide semiconductor) tube, a monitoring unit, a zigbee communication module and a master control unit, and the problem component unit is short-circuited in time through the MOS tube, so that the problems of large heat productivity and serious mismatch of the photovoltaic component of the existing bypass diode are solved.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: the utility model provides a reduce intelligent terminal box of hot spot effect, includes the casing, be provided with the circuit board in the casing, the one end of circuit board is provided with and is no less than two wiring terminals that converge, the other end of circuit board is provided with the output cable, and adjacent two wiring terminal that converges is connected with the source electrode and the drain electrode of MOS pipe respectively, the grid connection control unit of MOS pipe, the control unit is connected with the monitoring unit, the monitoring unit is used for monitoring positive negative pole voltage of single unit package, generating power and terminal box temperature often, the control unit electric connection has zigbee communication module, zigbee communication module is used for sending photovoltaic module's operating condition for total control unit. The control unit, the MOS tube, the monitoring unit, the zigbee communication module and the master control unit are matched to detect the finding state of the photovoltaic module unit at all times, the problem component unit is in time short-circuited through the MOS tube, abnormal power generation information is sent to the master control unit through the zigbee communication module, and the problem photovoltaic panel can be found in time. Meanwhile, the heating energy consumption of the MOS tube is far lower than that of the diode under the same condition, the reverse leakage current of the MOS tube is greatly reduced compared with that of the diode during normal work, and the power generation efficiency of the photovoltaic module is improved to a certain extent due to the reduction of the energy consumption in the whole process.

Further optimize this technical scheme, the circuit board sets up in the mount pad, the mount pad with the one side that the wiring end that converges corresponds is provided with the interface chamber of bottom slope, the lower one side of bottom slope with the bottom opening of casing is corresponding, and photovoltaic module's the area of converging penetrates in the casing through the bottom opening, the area of converging is connected at the wiring end that converges of interface chamber bottom through screw and laminating, connect the oral cavity with be provided with the baffle between the circuit board, the baffle will the casing is cut apart into two chambeies. The bottom of the junction cavity is inclined, so that the bus bar can be conveniently connected with the bus wiring terminal after penetrating into the shell.

Further optimize this technical scheme, one side of MOS pipe is provided with the metal fin, the metal fin orientation the top of casing. The heat dissipation efficiency of the MOS tube can be improved.

Further optimize this technical scheme, the casing is provided with the one side cavity intussuseption of circuit board and is filled with sealed protection and glue. The wiring end that converges sets up in the one side of not filling sealed protection and gluing, and the dismouting of terminal box is realized to the screw of can being convenient.

Drawings

Fig. 1 is an exploded view of an intelligent junction box for reducing hot spot effect.

Fig. 2 is a schematic diagram of an internal structure of an intelligent junction box for reducing the hot spot effect.

Fig. 3 is a cross-sectional view taken at a-a in fig. 2.

In the figure: 1. a housing; 101. a bottom opening; 2. a mounting seat; 201. a mouth receiving cavity; 202. a partition plate; 3. a circuit board; 30. a bus terminal; 31. an output cable; 301. a control unit; 302. an MOS tube; 3021. a metal heat sink; 303. a zigbee communication module; 304. a monitoring unit; 4. a bus bar; 5. and (4) screws.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings of the embodiments. It is to be understood that this description is intended for purposes of illustration only and is not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the terms "a" and "an" or "the" and similar referents in the description and claims of the present invention also do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

The specific implementation mode is as follows: with reference to fig. 1-3, an intelligent junction box for reducing hot spot effect includes a housing 1, a circuit board 3 is provided in the housing 1, one end of the circuit board 3 is provided with three bus terminals 30, the three bus terminals 30 are respectively connected with two photovoltaic power generation units connected in series, the other end of the circuit board 3 is provided with an output cable 31, two adjacent bus terminals 30 are respectively connected with a source and a drain of an MOS transistor 302, a gate of the MOS transistor 302 is connected with a control unit 301, one side of the MOS transistor 302 is provided with a metal heat sink 3021, and the metal heat sink 3021 faces the top of the housing 1. The control unit 301 is connected with a monitoring unit 304, the monitoring unit 304 is used for monitoring positive and negative voltages, real-time power generation power and junction box temperature of a single photovoltaic power generation unit assembly, the control unit 301 is electrically connected with a zigbee communication module 303, and the zigbee communication module 303 is used for sending the working state of the photovoltaic assembly to a master control unit. The circuit board 3 sets up in mount pad 2, mount pad 2 with the one side that the wiring terminal 30 corresponds that converges is provided with the interface chamber 201 of bottom slope, the lower one side of bottom slope with the bottom opening 101 of casing 1 is corresponding, and photovoltaic module's the area 4 that converges penetrates in the casing 1 through bottom opening 101, the area 4 that converges is connected with the wiring terminal 30 that converges of laminating in interface chamber 201 bottom through screw 5, meet the oral cavity 201 with be provided with baffle 202 between the circuit board 3, baffle 202 will casing 1 is cut apart into two chambeies. And a cavity at one side of the shell 1, which is provided with the circuit board 3, is filled with sealing protection glue.

When the photovoltaic power generation system is used, the control unit 301 receives real-time information of the monitoring unit 304, feeds back positive and negative voltages of the photovoltaic power generation units connected with the bus terminal 30, real-time power generation power and junction box temperature to the control unit 301, and when the control unit 301 finds that the power generation power of a certain photovoltaic power generation unit is abnormal, the photovoltaic power generation unit is short-circuited through the arranged MOS tube 302, so that the power generation power of the whole power generation system is prevented from being seriously influenced. As shown in fig. 1 to 3, when the terminal box needs to be replaced, the screw 5 is loosened to pull out the terminal box from the bus terminal 30 along the direction inclined from the bottom of the connector cavity 201, and the sequence of installing a new terminal box is opposite to the sequence of removing the terminal box.

The control mode of the utility model is automatically controlled by the controller, and the control circuit of the controller can be realized by simple programming of a person skilled in the art, which belongs to the common knowledge in the field, so the control mode and the circuit connection are not explained in detail in the utility model.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the utility model and are not to be construed as limiting the utility model. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. The utility model provides a reduce intelligent terminal box of hot spot effect, includes casing (1), be provided with circuit board (3) in casing (1), the one end of circuit board (3) is provided with and is no less than two terminal (30) that converge, the other end of circuit board (3) is provided with output cable (31), its characterized in that: two adjacent it converges wiring end (30) and is connected with the source and the drain electrode of MOS pipe (302) respectively, the grid connection control unit (301) of MOS pipe (302), control unit (301) are connected with monitoring unit (304), monitoring unit (304) are used for monitoring positive negative pole voltage, the power generation and terminal box temperature often of single subassembly, control unit (301) electric connection has zigbee communication module (303), zigbee communication module (303) are used for sending photovoltaic module's operating condition for total control unit.

2. The smart junction box of claim 1, wherein: the circuit board (3) are arranged in the mounting seat (2), the mounting seat (2) and one side corresponding to the convergence wiring terminal (30) are provided with a bottom inclined junction cavity (201), the lower side of the bottom inclination corresponds to the bottom opening (101) of the shell (1), the convergence belt (4) of the photovoltaic module penetrates into the shell (1) through the bottom opening (101), the convergence belt (4) is connected with the convergence wiring terminal (30) attached to the bottom of the interface cavity (201) through a screw (5), a partition plate (202) is arranged between the junction cavity (201) and the circuit board (3), and the partition plate (202) divides the shell (1) into two cavities.

3. The smart junction box of claim 2, wherein: one side of the MOS tube (302) is provided with a metal radiating fin (3021), and the metal radiating fin (3021) faces the top of the shell (1).

4. The smart junction box of claim 3, wherein said housing further comprises: and a cavity at one side of the shell (1) provided with the circuit board (3) is filled with sealing protection glue.