CN219876710U - Photovoltaic optimizer and photovoltaic power generation system - Google Patents

Abstract

Embodiments of the present application provide a photovoltaic optimizer and a photovoltaic power generation system. The photovoltaic optimizer includes a metal housing with an opening, a printed circuit board module with a non-metal housing, and a cable. Wherein, the metal shell is used to accommodate the printed circuit board module, and the outer wall of the metal shell has a hanging ear structure. The hanging ear structure includes at least one hanging hole for hanging the photovoltaic optimizer on the target structure. The non-metallic housing includes at least one through hole, and the printed circuit board module includes a printed circuit board and at least one device mounted on the printed circuit board. The input end of the cable passes through at least one through hole and is connected to the printed circuit board. Correspondingly, through a single component of the metal shell, the heat dissipation of the photovoltaic optimizer can be realized, and the photovoltaic optimizer can be mounted on the target structure. Therefore, the photovoltaic optimizer has a simple structure, is easy to assemble, and has low cost. Thereby reducing the cost of photovoltaic power generation system.

Description

Photovoltaic optimizer and photovoltaic power generation system

Technical Field

The embodiment of the utility model relates to the technical field of photovoltaics, in particular to a photovoltaic optimizer and a photovoltaic power generation system.

Background

In the photovoltaic power generation system, the photovoltaic optimizer can realize maximum power tracking and quick turn-off of the photovoltaic module. The printed circuit board in the existing photovoltaic optimizer is arranged in the accommodating cavity of the plastic shell, and the soaking piece and the radiator are arranged in the plastic shell to realize heat dissipation in the working process of the photovoltaic optimizer. In addition, a hanging structure is arranged in the radiator clamping groove, and the photovoltaic optimizer is hung on other devices through the hanging structure. However, the photovoltaic optimizer is relatively complex in structure, not easy to assemble, and relatively high in cost.

Disclosure of Invention

The embodiment of the utility model provides a photovoltaic optimizer and a photovoltaic power generation system, wherein a printed circuit board module with a nonmetal shell in the photovoltaic optimizer is arranged in a metal shell with a hanging structure, and a cable is connected with a printed circuit board in the printed circuit board module through a through hole on the nonmetal shell. Thus, the heat generated by the devices mounted on the printed circuit board is dissipated outside the metal housing through the non-metal housing during operation of the photovoltaic optimizer. The photovoltaic optimizer not only can ensure good heat dissipation effect, but also has the advantages of simple structure, easy assembly and lower cost. Correspondingly, the cost of the photovoltaic power generation system is lower.

In a first aspect, embodiments of the present utility model provide a photovoltaic optimizer. The photovoltaic optimizer includes a metal housing having an opening, a printed circuit board module having a non-metal housing, and a cable. The photovoltaic optimizer comprises a metal shell, a printed circuit board module, a photovoltaic optimizer, a target structure and a hanging structure, wherein the metal shell is used for accommodating the printed circuit board module, the outer wall of the metal shell is provided with the hanging structure, the hanging structure comprises at least one hanging hole, and the at least one hanging hole is used for hanging the photovoltaic optimizer on the target structure. The non-metallic housing includes at least one through hole and the printed circuit board module includes a printed circuit board and at least one device mounted on the printed circuit board. The input end of the cable passes through at least one through hole to be connected with the printed circuit board.

The photovoltaic optimizer provided by the embodiment of the utility model is characterized in that a printed circuit board module with a nonmetal shell is arranged in a metal shell with a hanging structure, and a cable is connected with the printed circuit board in the printed circuit board module through a through hole on the nonmetal shell. Accordingly, heat generated from the devices mounted on the printed circuit board is transferred to the metal case through the non-metal case, thereby being dissipated outside the metal case. In addition, the metal shell is provided with a hanging structure, so that the heat dissipation of the photovoltaic optimizer can be realized and the hanging of the photovoltaic optimizer on a target structure can be realized through one part of the metal shell. Therefore, the photovoltaic optimizer not only can ensure good heat dissipation effect, but also has the advantages of simple structure, easy assembly and lower cost. Thereby reducing the cost of the photovoltaic power generation system.

In one implementation, a limiting structure is disposed on an inner wall of the metal housing, and the limiting structure is matched with the printed circuit board module to prevent the printed circuit board module from moving in the metal housing.

In one implementation, the spacing structure includes first and second protrusions protruding from the first inner wall of the metal shell to the second inner wall of the metal shell, and third and fourth protrusions protruding from the second inner wall of the metal shell to the first inner wall of the metal shell. The first portion of the printed circuit board module having the non-metallic housing is received between the first protrusion and the second protrusion, and the second portion of the printed circuit board module having the non-metallic housing is received between the third protrusion and the fourth protrusion. In addition, a distance between a wall of the first protrusion adjacent to the second protrusion and a wall of the second protrusion adjacent to the first protrusion is equal to a dimension of the first portion of the printed circuit board module having the non-metal case along a third inner wall perpendicular to the metal case, and a distance between a wall of the third protrusion adjacent to the fourth protrusion and a wall of the fourth protrusion adjacent to the third protrusion is equal to a dimension of the second portion of the printed circuit board module having the non-metal case along a third inner wall perpendicular to the metal case. The first inner wall of the metal shell and the second inner wall of the metal shell are arranged oppositely, the third inner wall of the metal shell is perpendicular to the first inner wall of the metal shell, and the third inner wall of the metal shell is parallel to the wall, opposite to the first protrusion, of the second protrusion. Correspondingly, the printed circuit board module with the nonmetal shell is arranged in the space formed by the first bulge, the second bulge, the third bulge and the fourth bulge of the metal shell, and the printed circuit board module with the nonmetal shell can be limited to move along the direction vertical to the third inner wall by mutually matching the first bulge, the second bulge, the third bulge and the fourth bulge in the inner wall of the metal shell with the printed circuit board module with the nonmetal shell.

In one implementation, the dimension of the printed circuit board module having the non-metallic housing along the first inner wall perpendicular to the metallic housing is equal to the distance between the first inner wall of the metallic housing and the second inner wall of the metallic housing. The distance between the first protrusion and the third inner wall of the metal shell is equal to the distance between the third protrusion and the third inner wall of the metal shell; the distance between the second protrusion and the third inner wall of the metal shell is equal to the distance between the fourth protrusion and the third inner wall of the metal shell. Accordingly, the first inner wall and the second inner wall of the metal shell can limit the movement of the printed circuit board module with the nonmetal shell along the direction perpendicular to the first inner wall of the metal shell.

In one implementation, the limit structure includes a first groove recessed from a first inner wall of the metal shell toward a second inner wall of the metal shell away from the metal shell, and a second groove recessed from the second inner wall of the metal shell toward the first inner wall of the metal shell away from the metal shell, the first groove and the second groove being in communication with the opening of the metal shell, respectively. A first portion of the printed circuit board module having a non-metallic housing is received in the first recess and a second portion of the printed circuit board module having a non-metallic housing is received in the second recess. In addition, the dimension of the first groove along the third inner wall perpendicular to the metal shell is equal to the dimension of the first part of the printed circuit board module with the nonmetal shell along the third inner wall perpendicular to the metal shell, and the dimension of the second groove along the third inner wall perpendicular to the metal shell is equal to the dimension of the second part of the printed circuit board module with the nonmetal shell along the third inner wall perpendicular to the metal shell. The second inner wall of the metal shell and the first inner wall of the metal shell are arranged oppositely, and the third inner wall of the metal shell is perpendicular to the first inner wall of the metal shell. Correspondingly, the printed circuit board module with the nonmetal shell is arranged in a space formed by the first groove and the second groove of the metal shell, and the first groove and the second groove are respectively matched with the printed circuit board module with the nonmetal shell, so that the movement of the printed circuit board module with the nonmetal shell along the direction vertical to the third inner wall can be limited.

In one implementation, the dimension of the printed circuit board module having the non-metallic housing along the first inner wall perpendicular to the metallic housing is equal to the distance between the wall of the first recess furthest from the second recess and the wall of the second recess furthest from the first recess. In addition, the distance between the first groove and the third inner wall of the metal shell is equal to the distance between the second groove and the third inner wall of the metal shell. Accordingly, the first groove and the second groove of the metal shell can limit the movement of the printed circuit board module with the nonmetal shell along the direction perpendicular to the first inner wall of the metal shell.

In one implementation, the metal housing and the non-metal housing are connected by glue or screws. Correspondingly, the metal shell and the nonmetal shell are fixedly connected through colloid or screws, so that the printed circuit board module with the nonmetal shell can be prevented from shaking in the metal shell, and the service life of the photovoltaic optimizer is prolonged.

In one implementation, the non-metallic housing is a plastic housing.

In one implementation, the metal shell is formed by metal material through sheet metal forming and welding; or the metal shell is formed by molding and cutting a metal material through a section bar. It should be appreciated that the metal housing may also be made by other processes.

In a second aspect, embodiments of the present utility model provide a photovoltaic power generation system. The photovoltaic power generation system comprises the photovoltaic optimizer and the photovoltaic module of the first aspect and any one of the possible implementations of the first aspect. The other end of the cable of the photovoltaic optimizer extends out of the metal shell to form a connector, and the connector is used for connecting a photovoltaic module.

The technical effects of the second aspect may be referred to the corresponding descriptions in the first aspect, and are not repeated here.

Drawings

Fig. 1 is a schematic diagram of a photovoltaic power generation system according to an embodiment of the present utility model.

Fig. 2 is an exploded schematic view of a photovoltaic optimizer provided by an embodiment of the present utility model.

Fig. 3 is an assembly schematic diagram of an example of a photovoltaic optimizer provided in an embodiment of the present utility model.

Fig. 4 and 5 are schematic views illustrating the assembly between a metal housing and a printed circuit board module in the photovoltaic optimizer of fig. 3, respectively.

Fig. 6 is an assembly schematic of another example photovoltaic optimizer provided in an embodiment of the present utility model.

Fig. 7 and 8 are schematic views illustrating the assembly between the metal housing and the printed circuit board module in the photovoltaic optimizer of fig. 6, respectively.

Detailed Description

The technical solutions in the embodiments of the present utility model will be described below with reference to the accompanying drawings.

In the description of the embodiments of the present utility model, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone.

In the embodiment of the present utility model, prefix words such as "first", "second", "third", "fourth" and "fifth" are used merely to distinguish different description objects, and there is no limitation on the position, sequence, priority, number or content of the described objects. The use of ordinal words and the like in embodiments of the present utility model to distinguish between the prefix words used to describe an object does not limit the described object, and statements of the described object are to be read in the claims or in the context of the embodiments and should not constitute unnecessary limitations due to the use of such prefix words. In addition, in the description of the present embodiment, unless otherwise specified, the meaning of "a plurality" is two or more.

Reference in the specification to "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the utility model. Thus, appearances of the phrases "in some embodiments" or the like in various places throughout this specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

The reference to "equal" in the present utility model is not strictly equal but is within the tolerance of the error. "flush" is not strictly flush, but is within the tolerance of the error.

In the embodiments of the present utility model, the same reference numerals denote the same components or the same parts. In the embodiment of the present utility model, for a plurality of identical components, reference numerals may be given to only one of the components in the drawings. The same reference numerals are used for other identical parts or components. In addition, the dimensions and sizes of the components shown in the drawings are merely exemplary.

In the photovoltaic power generation system, the photovoltaic optimizer can realize maximum power tracking and quick turn-off of the photovoltaic module. The printed circuit board in the existing photovoltaic optimizers is disposed in the receiving cavity of the plastic housing. Furthermore, it is possible to provide a device for the treatment of a disease. And a soaking piece and a radiator are required to be arranged in the plastic shell to realize heat dissipation in the working process of the photovoltaic optimizer. However, the structure of the photovoltaic optimizer is relatively complex and is not easy to assemble.

In view of this, the embodiment of the utility model provides a photovoltaic optimizer and a photovoltaic power generation system, wherein a printed circuit board module with a nonmetal shell in the photovoltaic optimizer is arranged in a metal shell with a hanging structure, and a cable is connected with a printed circuit board in the printed circuit board module through a through hole on the nonmetal shell. Thus, the heat generated by the devices mounted on the printed circuit board is dissipated outside the metal housing through the non-metal housing during operation of the photovoltaic optimizer. The photovoltaic optimizer not only can ensure good heat dissipation effect, but also has the advantages of simple structure, easy assembly and lower cost. Correspondingly, the cost of the photovoltaic power generation system is lower.

The following describes in detail the photovoltaic power generation system provided in the embodiment of the present utility model with reference to fig. 1.

Fig. 1 is a schematic diagram of a photovoltaic power generation system according to an embodiment of the present utility model.

As shown in fig. 1, a photovoltaic power generation system 1 provided by an embodiment of the present utility model includes one or more photovoltaic modules 10, one or more photovoltaic optimizers 20, a photovoltaic inverter 30, a transformer 40, a three-phase ac power grid 50, a first dc cable 60, a second dc cable 70, a first ac cable 80, and a second ac cable 90. Wherein one or more photovoltaic modules 10 are connected to the photovoltaic optimizer 20 through a first direct current cable 60, the connection relationship of the photovoltaic modules 10 and the photovoltaic optimizer 20 may be one-to-one connection. One or more photovoltaic optimizers 20 are connected to the photovoltaic inverter 30 through a second DC cable 70. The photovoltaic inverter 30 converts the dc power into ac power, and the ac side of the photovoltaic inverter 30 is connected to the transformer 40 via a first ac cable 80. The transformer 40 is connected to the three-phase ac power grid 50 by a second ac cable 90. Thus, the ac power output from the photovoltaic inverter 30 passes through the transformer 40 and flows into the three-phase ac power grid 50. The respective devices included in the photovoltaic power generation system 1 are described in detail below.

The photovoltaic power generation system is a power generation system which converts solar radiation energy into electric energy by utilizing the photovoltaic effect of semiconductor materials. The photovoltaic power generation system provided by the embodiment of the utility model can energize an electric vehicle. The electric vehicle includes a pure electric vehicle (pure electric vehicle/battery electric vehicle, pure EV/battery EV), a hybrid electric vehicle (hybrid electric vehicle, HEV), an extended range electric vehicle (range extended electric vehicle, REEV), a plug-in hybrid electric vehicle (plug-in hybrid electric vehicle, PHEV), a new energy vehicle (new energy vehicle, NEV), or the like.

The Photovoltaic module 10 may also be referred to as a Photovoltaic array, comprising a plurality of Photovoltaic (PV) strings. Each photovoltaic string comprises a plurality of photovoltaic panels connected in series. Photovoltaic panels are used to convert light energy into electrical energy. The electrical energy generated by the photovoltaic panel is Direct Current (DC) electricity. The voltage across the string of photovoltaic groups is equal to the sum of the voltages produced by the plurality of photovoltaic panels. The output power of the photovoltaic module may represent the electrical energy output per unit time of the photovoltaic module.

The photovoltaic optimizer 20 may also be referred to as a photovoltaic power optimizer, and may continuously track the maximum power point of each photovoltaic module 10 to increase the power generation of the photovoltaic power generation system 1, and simultaneously has the functions of module-level shutdown, module-level monitoring, and the like, and supports the long-string design to capture the maximum power point.

In one embodiment, the photovoltaic optimizer 20 includes a metal housing having an opening, a printed circuit board module having a non-metal housing, and a cable. The photovoltaic optimizer comprises a metal shell, a printed circuit board module, a photovoltaic optimizer, a target structure and a hanging structure, wherein the metal shell is used for accommodating the printed circuit board module, the outer wall of the metal shell is provided with the hanging structure, the hanging structure comprises at least one hanging hole, and the at least one hanging hole is used for hanging the photovoltaic optimizer on the target structure. The non-metallic housing includes at least one through hole and the printed circuit board module includes a printed circuit board. The input end of the cable passes through at least one through hole to be connected with the printed circuit board.

The photovoltaic inverter 30 is used to convert input direct current into alternating current (alternating current, AC) electricity, i.e., DC-AC conversion. The photovoltaic inverter 30 may also be referred to as a DC-AC converter.

The transformer 40 may be used to voltage convert the ac power to adjust the voltage value of the input ac voltage. It should be appreciated that the input and the input of the transformer 40 are both alternating current. The transformer 40 may boost the alternating current output by the one or more photovoltaic inverters 30.

In the photovoltaic power generation system 1, the area of each photovoltaic module 10 is generally fixed, and when the light intensity of the light is unchanged, the larger the included angle between the light irradiated on the photovoltaic module 10 and the plane in which the photovoltaic module 10 is located, that is, the smaller the incident angle of the light irradiated on the photovoltaic module 10, the more electric energy is output by the photovoltaic module 10. When the light vertically irradiates on the photovoltaic module 10, that is, the included angle between the light and the plane where the photovoltaic module 10 is located is 90 degrees, and reaches the maximum value, the power output by the photovoltaic module 10 reaches the maximum value.

When the photovoltaic power generation system 1 includes a plurality of photovoltaic optimizers 20, the photovoltaic power generation system 1 further includes a junction box for junction the direct currents generated by the plurality of photovoltaic modules 10, and inputs the junction-processed output to the photovoltaic inverter 30 after passing through a cut-off switch and lightning protection.

The following describes in detail the photovoltaic optimizer 20 provided in the embodiment of the present utility model with reference to fig. 2 to 8.

Fig. 2 is an exploded schematic diagram of a photovoltaic optimizer provided in an embodiment of the present utility model. Fig. 3 is an assembly schematic diagram of an example of a photovoltaic optimizer provided in an embodiment of the present utility model. Fig. 4 and 5 are schematic views illustrating the assembly between a metal housing and a printed circuit board module in the photovoltaic optimizer of fig. 3, respectively. Fig. 6 is an assembly schematic of another example photovoltaic optimizer provided in an embodiment of the present utility model. Fig. 7 and 8 are schematic views illustrating the assembly between the metal housing and the printed circuit board module in the photovoltaic optimizer of fig. 6, respectively.

As shown in fig. 2, 3 and 6, the photovoltaic optimizer 20 includes a metal housing 210 having an opening, a printed circuit board module 220 having a non-metal housing 221, and a cable 230. The metal housing 210 is configured to accommodate the printed circuit board module 220, and the outer wall of the metal housing 210 has a hanging structure 211, where the hanging structure 211 includes at least one hanging hole 2111, and the at least one hanging hole 2111 is configured to hang the photovoltaic optimizer 20 on a target structure. The nonmetallic housing 221 includes at least one through hole, and the printed circuit board module 220 includes a printed circuit board and at least one device mounted on the printed circuit board; the input 231 of the cable 230 is connected to the printed circuit board through at least one through hole.

In the embodiment of the present utility model, the printed circuit board module 220 in the photovoltaic optimizer 20 is disposed in the nonmetal case 221, and the nonmetal case 221 with the printed circuit board module 220 is disposed in the metal case 210 with the hanging structure 211 on the outer wall, and the cable 230 is connected with the printed circuit board in the printed circuit board module 220 through the through hole on the nonmetal case 221. In this way, during operation of the photovoltaic optimizer 20, heat generated by the devices mounted on the printed circuit board is transferred to the metal case 210 through the non-metal case 221 so as to be dissipated outside the metal case 210. In addition, the metal case 210 has a hanging structure 211, so that both the heat dissipation of the photovoltaic optimizer 20 and the hanging of the photovoltaic optimizer 20 on a target structure can be achieved by one component of the metal case 210. Therefore, the photovoltaic optimizer 20 not only can ensure good heat dissipation effect, but also has a simple structure, easy assembly and lower cost. Accordingly, the cost of the photovoltaic power generation system 10 is also low.

For example, devices mounted on printed circuit boards include programmable logic controllers (programmable logic controller, PLCs), metal-oxide-semiconductor field-effect transistor (MOSFET) devices, and the like.

Illustratively, the target structure includes a support for the photovoltaic module 10, and the like.

The metal case 210 having an opening may be understood as a hollow structure having an opening of the metal case 210. Accordingly, the printed circuit board module 220 having the non-metal case 221 is accommodated in the hollow structure of the metal case 210.

In the embodiment of the present utility model, the metal shell 210 and the hanging structure 211 are an integral structure generated by an integral molding process. In one embodiment, the metal housing 210 is formed from metal material by sheet metal forming and welding. In one embodiment, the metal housing 210 is formed from a metal material by forming and cutting.

In some embodiments, the tab structure 211 is disposed on an outer wall of the metal shell 210 opposite its opening.

In some embodiments, the tab structure 211 is a sheet-like structure.

In some embodiments, the metal housing 210 may also be replaced with a non-metal housing.

In one embodiment, the non-metallic housing employs a material having a thermal conductivity greater than or equal to the thermal conductivity of the metallic material. For example, the nonmetallic housing is made of a material including polycarbonate PC plastic.

It will be appreciated that there will be differences in the thermal conductivity of the metallic materials. Further, the thermal conductivity of the material used for the nonmetallic housing is greater than or equal to that of the metallic material can be understood as: the non-metallic housing is made of a material having a thermal conductivity greater than or equal to the thermal conductivity of the lowest thermal conductivity metallic material.

In one embodiment, the non-metallic housing employs a thermal conductivity that meets the heat dissipation requirements of the photovoltaic optimizer 20. It should be appreciated that there may be differences in the heat dissipation requirements of the photovoltaic optimizer 20 under different conditions.

In embodiments of the present utility model, the printed circuit board module 220 may also be referred to as a printed circuit board assembly (printed circuit board assembly, PCBA).

Illustratively, the non-metallic housing 221 may be a plastic housing. It should be understood that a plastic housing is understood to be a housing made of plastic material.

In some embodiments, as shown in fig. 2, the non-metallic housing 221 includes an upper housing 2211 and a lower housing 2212. The upper housing 2211 and the lower housing 2212 are respectively hollow structures with openings, the openings of the upper housing 2211 and the openings of the lower housing 2212 are buckled relatively, and the hollow structures of the upper housing 2211 and the hollow structures of the lower housing 2212 can be communicated to form a containing cavity for containing the printed circuit board module 220.

In some embodiments, a limiting structure is disposed on an inner wall of the metal housing 210. The limiting structure cooperates with the pcb module 220 to prevent the pcb module 220 from moving in the metal housing 210.

In one embodiment, the spacing structure includes a boss. The following describes the limiting structure provided by the embodiment of the present utility model in detail with reference to fig. 4 and 5.

In one example, as shown in fig. 4, the limiting structure includes first and second protrusions 2121 and 2122 protruding from the first inner wall M1 of the metal case 210 toward the second inner wall M2 of the metal case 210, and third and fourth protrusions 2123 and 2124 protruding from the second inner wall M2 of the metal case 210 toward the first inner wall M1 of the metal case 210. A first portion a of the printed circuit board module 220 having the non-metallic housing 221 is received between the first bump 2121 and the second bump 2122 and a second portion B of the printed circuit board module 220 is received between the third bump 2123 and the fourth bump 2124. In addition, the distance between the wall of the first protrusion 2121 near the second protrusion 2122 and the wall of the second protrusion 2122 near the first protrusion 2121 is equal to the dimension of the first portion a of the printed circuit board module 220 with the non-metal case 221 along the direction perpendicular to the third inner wall M3 of the metal case 210, and the distance between the wall of the third protrusion 2123 near the fourth protrusion 2124 and the wall of the fourth protrusion 2124 near the third protrusion 2123 is equal to the dimension of the second portion B of the printed circuit board module 220 with the non-metal case 221 along the direction perpendicular to the third inner wall M3 of the metal case 210. Wherein the first inner wall M1 of the metal casing 210 and the second inner wall M2 of the metal casing 210 are arranged opposite to each other. The third inner wall M3 of the metal shell 210 is perpendicular to the first inner wall M1 of the metal shell 210, and the third inner wall M3 of the metal shell 210 is parallel to the wall of the first protrusion 2121 opposite to the second protrusion 2122.

Accordingly, the printed circuit board module 220 having the non-metal case 221 may be disposed in a space formed by the first, second, third and fourth protrusions 2121, 2122, 2123 and 2124 of the metal case 210 along the opening of the metal case 210, the gap between the first and second protrusions 2121 and 2122, and the gap between the third and fourth protrusions 2123 and 2124.

In this example, the first, second, third and fourth protrusions 2121, 2122, 2123 and 2124 of the inner wall of the metal case 210 are respectively matched with the printed circuit board module 220 having the non-metal case 221 to restrict movement of the printed circuit board module 220 having the non-metal case 221 in a direction perpendicular to the third inner wall M3.

Further, in some embodiments, as shown in fig. 3, the size of the printed circuit board module 220 with the non-metal housing 221 along the direction perpendicular to the first inner wall M1 of the metal housing 210 is equal to the distance between the first inner wall M1 of the metal housing 210 and the second inner wall M2 of the metal housing 210. Further, the distance between the first protrusion 2121 and the third inner wall M3 of the metal shell 210 is equal to the distance between the third protrusion 2123 and the third inner wall M3 of the metal shell 210; the distance between the second protrusion 2122 and the third inner wall M3 of the metal shell 210 is equal to the distance between the fourth protrusion 2124 and the third inner wall M3 of the metal shell 210. Accordingly, the first and second inner walls M1 and M2 of the metal case 210 may restrict the movement of the printed circuit board module 220 having the non-metal case 221 in a direction perpendicular to the first inner wall M1 of the metal case 210.

In another example, as shown in fig. 5, the limiting structure includes only a first protrusion 2121 protruding from the first inner wall M1 of the metal housing 210 toward the second inner wall M2 of the metal housing 210, and a third protrusion 2123 protruding from the second inner wall M2 of the metal housing 210 toward the first inner wall M1 of the metal housing 210. The first portion a of the printed circuit board module 220 having the non-metal case 221 is received between the first protrusion 2121 and the fourth inner wall M4 of the metal case 210. In addition, a distance between a wall of the first protrusion 2121 adjacent to the fourth inner wall M4 of the metal case 210 and the fourth inner wall M4 of the metal case 210 is equal to a dimension of the first portion a of the printed circuit board module 220 having the non-metal case 221 along a direction perpendicular to the third inner wall M3 of the metal case 210, and a distance between the third protrusion 2123 adjacent to the fourth inner wall M4 of the metal case 210 and the fourth inner wall M4 of the metal case 210 is equal to a dimension of the second portion B of the printed circuit board module 220 having the non-metal case 221 along a direction perpendicular to the third inner wall M3 of the metal case 210. Wherein the first inner wall M1 of the metal casing 210 and the second inner wall M2 of the metal casing 210 are arranged opposite to each other. The third inner wall M3 of the metal case 210 and the fourth inner wall M4 of the metal case 210 are arranged opposite to each other, the third inner wall M3 of the metal case 210 is perpendicular to the first inner wall M1 of the metal case 210, and the third inner wall M3 of the metal case 210 is parallel to the wall of the first protrusion 2121 opposite to the second protrusion 2122.

Accordingly, the printed circuit board module 220 having the non-metal case 221 may be disposed in a space formed by the first protrusion 2121, the third protrusion 2123, and the fourth inner wall M4 of the metal case 210 along the opening of the metal case 210, the gap between the first protrusion 2121 and the fourth inner wall M4 of the metal case 210, and the gap between the third protrusion 2123 and the fourth inner wall M4 of the metal case 210.

In this example, the first protrusions 2121, the third protrusions 2123, and the fourth inner wall M4 of the metal housing 210 in the inner wall of the metal housing 210 are respectively matched with the printed circuit board module 220 having the non-metal housing 221, and movement of the printed circuit board module 220 having the non-metal housing 221 in a direction perpendicular to the third inner wall M3 is restricted.

Further, in some embodiments, the size of the printed circuit board module 220 with the non-metal housing 221 along the direction perpendicular to the first inner wall M1 of the metal housing 210 is equal to the distance between the first inner wall M1 of the metal housing 210 and the second inner wall M2 of the metal housing 210. Further, the distance between the first protrusion 2121 and the third inner wall M3 of the metal shell 210 is equal to the distance between the third protrusion 2123 and the third inner wall M3 of the metal shell 210. Accordingly, the first and second inner walls M1 and M2 of the metal case 210 may restrict the movement of the printed circuit board module 220 having the non-metal case 221 in a direction perpendicular to the first inner wall M1 of the metal case.

In one embodiment, the spacing structure includes a groove. The following describes the limiting structure provided by the embodiment of the present utility model in detail with reference to fig. 7 to 8.

As shown in fig. 7 and 8, the stopper structure includes a first groove 2125 recessed from the first inner wall M1 of the metal housing 210 toward the second inner wall M2 away from the metal housing 210, and a second groove 2126 recessed from the second inner wall M2 of the metal housing 210 toward the first inner wall M1 away from the metal housing 210, the first groove 2125 and the second groove 2126 communicating with the opening of the metal housing 210, respectively. A first portion a of the printed circuit board module 220 having the non-metallic housing 221 is received in the first recess 2125 and a second portion B of the printed circuit board module 220 having the non-metallic housing 221 is received in the second recess 2126. In addition, the first groove 2125 has a dimension perpendicular to the third inner wall M3 of the metal case 210 equal to the dimension perpendicular to the third inner wall M3 of the printed circuit board module 220 having the non-metal case 221, and the second groove 2126 has a dimension perpendicular to the third inner wall M3 of the metal case 210 equal to the dimension perpendicular to the third inner wall M3 of the metal case 210 of the second portion B of the printed circuit board module 220 having the non-metal case 221. Wherein the second inner wall M2 of the metal casing 210 and the first inner wall M1 of the metal casing 210 are arranged opposite to each other, and the third inner wall M3 of the metal casing 210 is perpendicular to the first inner wall M1 of the metal casing 210.

In this example, the first groove 2125 and the second groove 2126 are respectively matched with the printed circuit board module 220 having the nonmetallic housing 221 to restrict movement of the printed circuit board module 220 having the nonmetallic housing 221 in a direction perpendicular to the third inner wall M3.

The first groove 2125 has two communicating openings, one opening of the first groove 2125 is oriented in the same direction as the opening of the metal shell 210, and the other opening of the first groove 2125 is oriented perpendicularly to the first inner wall M1 of the metal shell 210. In addition, the second groove 2126 also has two openings, one opening of the second groove 2126 is oriented in the same direction as the opening of the metal housing 210, and the other opening of the second groove 2126 is oriented perpendicular to the first inner wall M1 of the metal housing 210. Accordingly, the pcb module 220 having the non-metal housing 221 may be disposed in the first and second grooves 2125 and 2126 of the metal housing 210 along the opening of the metal housing 210, the opening of the first groove 2125 perpendicular to the first inner wall M1 of the metal housing 210, and the opening of the second groove 2126 perpendicular to the first inner wall M1 of the metal housing 210.

In one embodiment, as shown in fig. 7, both of the opposing walls of the first groove 2125 and the second groove 2126 in the direction perpendicular to the third inner wall M3 are not flush with the third inner wall M3 of the metal shell 210 or the fourth inner wall M4 of the metal shell 210. In one embodiment, as shown in fig. 8, one of the two walls of the first groove 2125 and the second groove 2126, which are oppositely arranged in a direction perpendicular to the third inner wall M3, is flush with the fourth inner wall M4 of the metal shell 210. In one embodiment, one of the two opposing walls of the first groove 2125 and the second groove 2126 in a direction perpendicular to the third inner wall M3 is flush with the third inner wall M3 of the metal shell 210.

Further, in some embodiments, as shown in fig. 6, the dimension of the printed circuit board module 220 with the non-metallic housing 221 along the first inner wall M1 perpendicular to the metallic housing 210 is equal to the distance between the wall of the first recess 2125 furthest from the second recess 2126 and the wall of the second recess 2126 furthest from the first recess 2125. In addition, the distance between the first groove 2125 and the third inner wall M3 of the metal housing 210 is equal to the distance between the second groove 2126 and the third inner wall M3 of the metal housing 210. Accordingly, the first and second grooves 2125 and 2126 may restrict the movement of the printed circuit board module 220 having the non-metal case 221 in a direction perpendicular to the first inner wall M1 of the metal case 210.

It should be understood that the distance between the first groove 2125 and the third inner wall M3 of the metal housing 210 may be understood as a distance between the wall of the first groove 2125 parallel to the third inner wall M3 and the third inner wall M3. Similarly, the distance between the second groove 2126 and the third inner wall M3 of the metal housing 210 can be understood as the distance between the wall of the second groove 2126 parallel to the third inner wall M3 and the third inner wall M3. Wherein the wall of the first groove 2125 parallel to the third inner wall M3 is flush with the wall of the second groove 2126 parallel to the third inner wall M3.

In some embodiments, the metal shell 210 and the non-metal shell 221 are connected by glue.

In one example, in the case that the limiting structure is disposed on the metal casing 210, the surface where the non-metal casing 221 contacts with the limiting structure is dispensed, so as to connect the metal casing 210 with the non-metal casing 221.

For example, in the case where the first protrusion 2121, the second protrusion 2122, the third protrusion 2123, and the fourth protrusion 2124 are provided on the inner wall of the metal shell 210, the non-metal shell 221 is surface-dispensed in contact with the first protrusion 2121, the second protrusion 2122, the third protrusion 2123, and the fourth protrusion 2124, respectively, to effect connection of the metal shell 210 to the non-metal shell 221.

For another example, in the case where the first protrusions 2121 and the third protrusions 2123 are provided on the inner wall of the metal shell 210, the non-metal shell 221 is bonded to the non-metal shell 221 by dispensing the surface of the non-metal shell 221 that contacts the first protrusions 2121, the third protrusions 2123, and the fourth inner wall M4 of the metal shell 210, respectively.

For another example, in the case where the first groove 2125 and the second groove 2126 are provided on the inner wall of the metal shell 210, the surface of the non-metal shell 221, which is in contact with the first groove 2125 and the second groove 2126, respectively, is dispensed with glue, so that the metal shell 210 is connected to the non-metal shell 221.

In another example, in the case that the limiting structure is not disposed on the metal housing 210, the surface of the metal housing 210 contacting with the non-metal housing 221 is glued to realize the connection between the metal housing 210 and the non-metal housing 221.

In some embodiments, the metal shell 210 and the non-metal shell 221 are connected by screws. Specifically, the screw passes through the other walls of the metal casing 210 except the wall where the opening is located, and is screwed into the wall of the nonmetal casing 221, so as to fix the metal casing 210 and the nonmetal casing 221.

In some embodiments, cable 230 includes an input 231, a wire 232, and an output 233.

As shown in fig. 1, since one end of the photovoltaic optimizer 20 is connected to the photovoltaic module 10, the other end is connected to the photovoltaic inverter 30. Thus, as shown in fig. 2, 3 and 6, the output 233 of the cable 230 of the photovoltaic optimizer 20 includes a first output 2331 and a second output 2332. The first output terminal 2331 corresponds to the first conductive line 2321 and the second conductive line 2322. Similarly, the second output terminal 2332 corresponds to the third conductive line 2323 and the fourth conductive line 2324. In addition, the first output terminal 2331 corresponds to the first input terminal 2311 and the second input terminal 2312. One of the first input terminal 2311 and the second input terminal 2312 is used for connecting with a positive electrode on a printed circuit board in the printed circuit board module 220, and the other input terminal is used for connecting with a negative electrode on the printed circuit board in the printed circuit board module 220. Similarly, the second output 2332 corresponds to the third input 2313 and the fourth input 2314. One of the third input terminal 2313 and the fourth input terminal 2314 is used for connecting with a positive electrode on a printed circuit board in the printed circuit board module 220, and the other input terminal is used for connecting with a negative electrode on the printed circuit board in the printed circuit board module 220.

Further, the nonmetallic housing 221 includes four through holes, such as a first through hole 2213, a second through hole 2214, a third through hole 2215, and a fourth through hole 2216 shown in fig. 2, 3, and 6. The first input terminal 2311 is connected to the printed circuit board in the printed circuit board module 220 through the first through hole 2213, the second input terminal 2312 is connected to the printed circuit board in the printed circuit board module 220 through the second through hole 2214, the third input terminal 2313 is connected to the printed circuit board in the printed circuit board module 220 through the third through hole 2215, and the fourth input terminal 2314 is connected to the printed circuit board in the printed circuit board module 220 through the fourth through hole 2216. The first output end 2331 extends out of the metal housing 210 to form one connector of the photovoltaic optimizer 20, and the second output end 2332 extends out of the metal housing 210 to form the other connector of the photovoltaic optimizer 20, one connector of the two connectors is connected with the photovoltaic module 10, and the other connector is connected with the photovoltaic inverter 30.

The input end 231 of the cable 230 refers to an end of the cable 230 connected to the inside of the photovoltaic optimizer 20. The output 233 of the cable 230 refers to the end of the cable 230 that is connected to other components in the photovoltaic power generation system. For example, other components include the photovoltaic module 10 and the photovoltaic inverter 30 shown in fig. 1.

In some embodiments, a potting compound is disposed between the inner wall of the non-metallic housing 221 and the printed circuit board module 220. The potting adhesive is used for transferring heat generated by devices on a printed circuit board in the printed circuit board module 220 to the nonmetal case 221, then to the metal case 210, and then to the surrounding air, so as to realize heat dissipation of the photovoltaic optimizer 20.

In some embodiments, a soaking plate is disposed between the inner wall of the non-metallic housing 221 and the surface of the printed circuit board module 220 where no devices are disposed. The soaking plate is used for soaking devices on the printed circuit board in the printed circuit board module 220.

In one embodiment, the photovoltaic optimizer 20 is assembled in the following order: first, the input ends 231 of the cables 230 are soldered to the printed circuit boards in the printed circuit board module 220. Next, the cable 230 is fitted to the through-hole of the nonmetallic housing 221, and the printed circuit board module 220 is fitted into the accommodation chamber formed by the upper housing 2211 and the lower housing 2212 of the nonmetallic housing 221. Again, the upper and lower housings 2211 and 2212 are secured together by ultrasonic welding to form the printed circuit board module 220 with the non-metallic housing 221. Finally, the printed circuit board module 220 with the nonmetallic housing 221 is inserted into the metallic housing 210 along the opening of the metallic housing 210 with the hanging structure 211. Thus, the photovoltaic optimizer 20 can achieve both heat dissipation of the photovoltaic optimizer 20 and attachment of the photovoltaic optimizer 20 to a target structure through one component of the metal housing 210.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (11)

1. A photovoltaic optimizer, characterized in that it includes a metal housing with an opening, a printed circuit board module with a non-metal housing, and a cable; Wherein, the metal shell is used to accommodate the printed circuit board module, and the outer wall of the metal shell is provided with a hanging ear structure. The hanging ear structure includes at least one hanging hole, and the at least one hanging hole is used for Attach the photovoltaic optimizer to the target structure; The non-metallic housing includes at least one through hole, and the printed circuit board module includes a printed circuit board and at least one device mounted on the printed circuit board; The input end of the cable passes through the at least one through hole and is connected to the printed circuit board. 2. The photovoltaic optimizer according to claim 1, characterized in that a limiting structure is provided on the inner wall of the metal shell, and the limiting structure cooperates with the printed circuit board module to prevent the The printed circuit board module moves in the metal housing. 3. The photovoltaic optimizer according to claim 2, characterized in that, The limiting structure includes a first protrusion and a second protrusion protruding from the first inner wall of the metal shell to the second inner wall of the metal shell, and a second protrusion protruding from the second inner wall of the metal shell. third protrusions and fourth protrusions protruding toward the first inner wall of the metal shell, the first inner wall of the metal shell and the second inner wall of the metal shell being arranged oppositely; The first portion of the printed circuit board module having a non-metallic shell is accommodated between the first protrusion and the second protrusion, and the third portion of the printed circuit board module having a non-metallic shell The two parts are accommodated between the third protrusion and the fourth protrusion; The distance between the wall of the first protrusion close to the second protrusion and the wall of the second protrusion close to the first protrusion is equal to the distance between the printed circuit board module and the non-metallic housing. The dimension of the first portion along the third inner wall perpendicular to the metal shell, and between the wall of the third protrusion close to the fourth protrusion and the wall of the fourth protrusion close to the third protrusion The distance between them is equal to the dimension of the second portion of the printed circuit board module with the non-metallic housing along the third inner wall perpendicular to the metal housing, wherein the third inner wall of the metal housing is perpendicular to the The first inner wall of the metal shell and the third inner wall of the metal shell are parallel to the opposite walls of the first protrusion and the second protrusion. 4. The photovoltaic optimizer according to claim 3, wherein the size of the printed circuit board module with the non-metallic shell along the first inner wall perpendicular to the metal shell is equal to the metal shell. The distance between the first inner wall and the second inner wall of the metal shell; The distance between the first protrusion and the third inner wall of the metal shell is equal to the distance between the third protrusion and the third inner wall of the metal shell; The distance between the second protrusion and the third inner wall of the metal shell is equal to the distance between the fourth protrusion and the third inner wall of the metal shell. 5. The photovoltaic optimizer according to claim 2, characterized in that, The limiting structure includes a first groove recessed from the first inner wall of the metal housing to a second inner wall away from the metal housing, and a first groove recessed from the second inner wall of the metal housing away from the metal housing. The first inner wall of the housing is recessed with a second groove. The first groove and the second groove are respectively connected with the opening of the metal housing. The second inner wall of the metal housing and the metal The first inner walls of the housing are arranged oppositely; The first part of the printed circuit board module with a non-metallic shell is accommodated in the first groove, and the second part of the printed circuit board module with a non-metallic shell is accommodated in the second recess. inside the tank; The dimension of the first groove along the third inner wall perpendicular to the metal shell is equal to the dimension perpendicular to the third inner wall of the first portion of the printed circuit board module with the non-metal shell, and the The dimension of the second groove along the third inner wall perpendicular to the metal housing is equal to the dimension of the second portion of the printed circuit board module with the non-metallic housing perpendicular to the third inner wall of the metal housing. , wherein the third inner wall of the metal housing is perpendicular to the first inner wall of the metal housing. 6. The photovoltaic optimizer according to claim 5, wherein the size of the printed circuit board module with the non-metallic shell along the first inner wall perpendicular to the metal shell is equal to the first concave The distance between the wall of the groove that is farthest from the second groove and the wall of the second groove that is farthest from the first groove; The distance between the first groove and the third inner wall of the metal housing is equal to the distance between the second groove and the third inner wall of the metal housing. 7. The photovoltaic optimizer according to claim 2, characterized in that the metal shell and the non-metal shell are connected by colloid or screws. 8. The photovoltaic optimizer according to any one of claims 1 to 7, characterized in that the non-metallic shell is a plastic shell. 9. The photovoltaic optimizer according to any one of claims 1 to 7, characterized in that the metal shell is made of metal material through sheet metal molding and welding; or, the metal shell is made of metal material It is formed and cut from profiles. 10. A photovoltaic power generation system, characterized in that it includes the photovoltaic optimizer and photovoltaic module according to any one of claims 1 to 9, and the output end of the cable of the photovoltaic optimizer extends out of the metal shell. The body forms a connector for connecting the photovoltaic modules. 11. The photovoltaic power generation system according to claim 10, characterized in that the photovoltaic power generation system further includes a bracket of the photovoltaic module, and the bracket of the photovoltaic module is the target structure.