Circuit board module for power equipment and photovoltaic inverter

Abstract

The utility model discloses a circuit board module for power equipment and a photovoltaic inverter. The circuit board module comprises a first circuit board, a second circuit board and a plurality of components, the plurality of components comprise a first component and a second component, the weight and / or volume of the first component is larger than that of the second component, the first component is only arranged on the first circuit board, and the second component is only arranged on the second circuit board. The second component is arranged on the first circuit board and / or the second circuit board; the first circuit board and the second circuit board intersect, the second circuit board is arranged on the first circuit board so as to be supported by the first circuit board, and a circuit layer on the first circuit board and a circuit layer on the second circuit board are directly contacted and conducted or conducted through an electric connector. The circuit board module for the power equipment is convenient to assemble, and is beneficial to reducing the overall size and weight of the power equipment.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaic inverters, or other power equipment fields to which the utility model is applied, and particularly relates to a circuit board module for power equipment and a photovoltaic inverter. Background Art

[0002] Currently, the PCB boards of inverters are generally placed horizontally, with two or more boards stacked on top of each other, connected by support columns or support plates, and signals are connected by flexible cables. This results in multiple assembly processes, complex production technology, high labor costs, and additional costs for components such as studs. Moreover, the additional support columns or support plates also increase the overall height or thickness of the inverter, as well as its overall weight. In addition, for the split-board method where multiple boards are placed horizontally and stacked on top of each other, to meet safety regulations, the distance between the boards needs to meet certain requirements, the cabinet needs to be enlarged, and it also affects the circulating cooling work of the fans inside the cabinet.

[0003] The above information disclosed in the background art section is only used to enhance the understanding of the background of the present application, and thus it may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides an improved circuit board module for power equipment, which is convenient to assemble and is beneficial to reducing the overall volume and weight of the power equipment. The utility model also provides a photovoltaic inverter using such a circuit board module, which is convenient to assemble and has a relatively small overall volume and weight.

[0005] The utility model adopts the following technical solutions:

[0006] A circuit board module for power equipment includes a first circuit board, a second circuit board, and a plurality of components disposed on the first circuit board or the second circuit board. The plurality of components include a first component and a second component. The weight and / or volume of the first component is greater than that of the second component. The first component is only disposed on the first circuit board, and the second component is disposed on the first circuit board and / or the second circuit board. The first circuit board and the second circuit board intersect, and the second circuit board is disposed on the first circuit board to be supported by the first circuit board. The circuit layer on the first circuit board and the circuit layer on the second circuit board are in direct contact conduction or conduction through an electrical connector.

[0007] In some preferred embodiments, the second circuit board is inserted into the first circuit board.

[0008] In some more preferred embodiments, jacks are provided on the first circuit board, and one side edge of the second circuit board is inserted into the jacks.

[0009] In some further preferred embodiments, the included angle between the second circuit board and the first circuit board as a whole is 90 ± 5 degrees.

[0010] In some preferred embodiments, a plurality of pins are provided on the second circuit board, and the pins are welded to the circuit layer of the first circuit board.

[0011] In some preferred embodiments, the first circuit board and the second circuit board are mechanically connected and electrically conducted through an electrical connector. The electrical connector includes a male connector and a female connector. One of the male connector and the female connector is disposed on the first circuit board, and the other is disposed on the second circuit board. After the male connector and the female connector are plugged into each other, the second circuit board is fixed on the first circuit board and the circuit layers of the first circuit board and the second circuit board are electrically conducted with each other.

[0012] In some more preferred embodiments, both the male connector and the female connector are board-to-board connectors, and one is fixed on the first circuit board while the other is fixed on the second circuit board. Conductors forming a power flow path are respectively provided in the male connector and the female connector.

[0013] In some preferred embodiments, the first component includes a thin-film capacitor or a relay; the second component includes components constituting a control circuit, a chip, a chip resistor, or a chip capacitor; and a plurality of the second circuit boards are provided on the first circuit board.

[0014] The present utility model also adopts the following technical solutions:

[0015] A photovoltaic inverter includes a box body and a radiator disposed outside the box body. The photovoltaic inverter further includes the circuit board module as described above.

[0016] In some preferred embodiments, the first circuit board includes an AC area and a DC area, and the second circuit board is disposed between the AC area and the DC area to separate the two areas; the PV input circuit, BOOST boost circuit, bus capacitor, inverter circuit, switch auxiliary circuit, AC output and its control circuit, or communication circuit of the photovoltaic inverter are disposed on the first circuit board, and the main control chip and sampling processing circuit of the photovoltaic inverter are disposed on the second circuit board.

[0017] The above solutions adopted by the present utility model have the following advantages:

[0018] For the circuit board module of the present utility model, the second circuit board is directly disposed on the first circuit board, and the circuits of the two are in direct contact conduction or conduction through the connectors on the two, which simplifies the assembly process, reduces the manual assembly cost, reduces the human resources, reduces the production cost, reduces the component cost, and reduces the overall volume and weight of the machine. The photovoltaic inverter of the present utility model is convenient to assemble, the overall volume and weight are reduced, and the influence of the circuit board module on the internal heat dissipation is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0020] Figure 1 FIG. 9 is a perspective view of a circuit board module according to an embodiment of the present utility model from one perspective.

[0021] Figure 2 FIG. 13 is a perspective view of a circuit board module according to an embodiment of the present utility model from another perspective.

[0022] Figure 3 FIG. 17 is a perspective view of a circuit board module according to an embodiment of the present utility model from yet another perspective.

[0023] Figure 4 For Figure 3 the partial enlarged view at A in FIG.

[0024] Figure 5 FIG. 27 is a perspective view of a second circuit board according to an embodiment of the present utility model.

[0025] Figure 6 FIG. 31 is a perspective view of a photovoltaic inverter according to an embodiment of the present utility model from one perspective, wherein the upper cover of the box body is not shown.

[0026] Wherein,

[0027] 100, circuit board module; 200, photovoltaic inverter; 300, box body; 400, radiator;

[0028] 1, first circuit board; 11, AC area; 12, DC area; 13, pad;

[0029] 2, second circuit board; 21, pin;

[0030] 3, first component;

[0031] 4, second component. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following will elaborate on the preferred embodiments of the present utility model in conjunction with the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art. It should be noted here that the description of these embodiments is for helping to understand the present utility model, but does not constitute a limitation to the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0033] Figures 1 to 6 The drawings are drawn to actual scale. To maintain the brevity of the specification, the proportions of each component are not listed one by one. However, the proportions and positions of each component should be regarded as part of the content of this specification.

[0034] Referring to Figures 1 to 5 As shown, this embodiment provides a circuit board module 100 for power equipment. The circuit board module 100 includes a first circuit board 1, a second circuit board 2, and a plurality of components disposed on the first circuit board 1 or the second circuit board 2. The first circuit board 1 and the second circuit board 2 intersect, and the second circuit board 2 is disposed on the first circuit board 1 to be supported by the first circuit board 1. The circuit layers on the first circuit board 1 and the second circuit board 2 are in direct contact conduction or conduction through an electrical connector. Here, the "circuit layer" refers to the conductor layer covered on the insulating substrate of the first circuit board 1 or the second circuit board 2; for example, for a copper substrate, the circuit layer refers to the copper circuit layer covered on the insulating substrate and possible pads or welding points (solder points), etc.

[0035] The plurality of components includes a first component 3 and a second component 4, and the weight and / or volume of the first component 3 is greater than that of the second component 4. Typically, the weight of the first component 3 is greater than the weight of the second component 4, or the volume (especially the height / thickness) of the first component 3 is greater than the volume of the second component 4. Among them, the first component 3 is only disposed on the first circuit board 1, and the second component 4 is disposed on the first circuit board 1 and / or the second circuit board 2. That is to say, large, high, and heavy components (such as thin-film capacitors, relays, etc., or other components) are all disposed on the first circuit board 1, and small, flat, and light components (such as components of a control circuit, chips, chip resistors and capacitors, etc.) are disposed on the second circuit board 2. It should be noted that there may also be small, flat, and light second components 4 on the first circuit board 1, but there will be no large, high, and heavy first components 3 on the second circuit board 2.

[0036] The second circuit board 2 can be inserted and fixed on the first circuit board 1. There are jacks on the first circuit board 1, and one side edge (such as the lower edge in the figure) of the second circuit board 2 is inserted into the jacks. The included angle between the second circuit board 2 and the first circuit board 1 as a whole is 90 ± 5 degrees. Ideally, the second circuit board 2 is vertically fixed on the first circuit board 1; however, in actual applications, a certain deviation is allowed. The vertical fixing method can be direct fixing by wave soldering or direct hard connection through a male-female socket connector, without connections such as wire harnesses and studs. The connection angle is generally a 90° right angle. Such a setting makes the assembly simple, saves plug terminals and wire harnesses, reduces manual assembly processes, and lowers production costs.

[0037] As Figure 4 and Figure 5 shown, there are multiple pins 21 on the second circuit board 2, and the pins 21 are welded to the circuit layer of the first circuit board 1. Specifically, the multiple pins 21 are arranged in parallel. One end of the pin 21 penetrates through the second circuit board 2 and is in contact and conduction with the circuit layer on the circuit board. After the pin 21 is bent, it is welded to the pad 13 on the first circuit board 1 through the wave soldering process. The pad 13 is part of the circuit layer of the first circuit board 1; it can also be separately arranged and in contact and conduction with each other.

[0038] In some other embodiments, the first circuit board 1 and the second circuit board 2 can also be mechanically connected and conducted through an electrical connector. The electrical connector includes a male connector and a female connector. One of the male connector and the female connector is arranged on the first circuit board 1, and the other is arranged on the second circuit board 2. After the male connector and the female connector are plugged into each other, the second circuit board 2 is fixed on the first circuit board 1 and the circuit layers of the first circuit board 1 and the second circuit board 2 are conducted with each other. Both the male connector and the female connector are board-end connectors, and one is fixed on the first circuit board 1 while the other is fixed on the second circuit board 2. Conductors for forming a power flow path, such as metal elastic sheets, are respectively provided in the male connector and the female connector.

[0039] Specifically in the example shown in the drawings, the first component 3 includes a thin-film capacitor or a relay; the second component 4 includes components, chips, chip resistors, or chip capacitors that constitute a control circuit.

[0040] In some other embodiments, multiple second circuit boards 2 can be inserted on the first circuit board 1.

[0041] This embodiment also provides a specific power device, namely a photovoltaic inverter. Figure 6 A photovoltaic inverter 200 of this embodiment is shown. Referring to Figure 6As shown, the photovoltaic inverter 200 includes a box 300 and a heat sink 400 disposed outside the box 300. The photovoltaic inverter 200 also includes the above-mentioned circuit board module 100, and the heat sink 400 is used to dissipate heat generated by the first component 3 on the circuit board module 100 (especially the first circuit board 1).

[0042] The first circuit board 1 includes an AC area 11 and a DC area 12, and the second circuit board 2 is arranged between the AC area 11 and the DC area 12 to separate the two areas. The PV input circuit, BOOST boost circuit, bus capacitor, inverter circuit, switch auxiliary circuit, AC output and its control circuit, or communication circuit of the photovoltaic inverter 200 are arranged on the first circuit board 1, and the main control chip and sampling processing circuit of the photovoltaic inverter 200 are arranged on the second circuit board 2.

[0043] The first circuit board 1 is fixed in the box 300, and the second circuit board 2 is supported by the first circuit board 1. No additional mechanical support or connection structure is set between the second circuit board 2 and the box 300. The first circuit board 1 contains PV input circuit, BOOST boost circuit, bus capacitor, inverter circuit, switch auxiliary circuit, AC output and its control circuit, secondary power supply and communication. These circuits basically contain relatively large, heavy and high components. The second circuit board contains the peripheral circuit of the main control chip and the sampling and processing circuit of the first circuit board 1 and other patch component circuits. These patches are relatively light, small and flat.

[0044] By vertically inserting the second circuit board 2 between the AC area 11 and the DC area 12 of the first circuit board 1, the second circuit board 2 can naturally block the AC and DC parts of the first circuit board 1, separate the two large loops, isolate the radiation of the two, and isolate the heat of the two, so that the heat distribution is more even; shorten the overall length of the control signal, shorten the signal response time, speed up the signal return speed, and improve EMC; at the same time, the vertical insertion position of the second circuit board 2 avoids the air outlet of the internal fan, and does not affect the internal fan's air cooling of surrounding components. If a traditional inter-board connection is used here, that is, the second PCB board is horizontally mounted on the first PCB board, on the one hand, due to the need to comply with safety regulations, the cabinet 300 of the whole machine will need to be expanded, and the cost will increase; on the other hand, it will affect the circulation cooling work of the internal fan 200, which is not heat-friendly.

[0045] The fan is located below the second circuit board 2 (it is located below because the machine is finally hung up for operation. Heat runs upwards, and the fan blowing upwards from the bottom takes advantage of this characteristic to increase the fan's turbulence), with a certain angle so that the wind avoids the second circuit board 2 and blows towards the components on the right side that are heating up severely.

[0046] This embodiment solves the disadvantages of complex processing and high interconnection cost between PCB board connections, and directly connects through wave soldering or hard connection of male and female socket terminals. It simplifies the assembly process, reduces the manual assembly cost, reduces human resources, lowers the production cost, reduces the component cost, and lightens the weight of the machine.

[0047] As shown in this specification and the claims, the terms "comprising" and "including" only imply the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The term "and / or" used herein includes any combination of one or more of the related listed items.

[0048] It should be noted that, unless otherwise specified, when a certain feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to another feature, or indirectly fixed or connected to another feature. In addition, the descriptions such as up, down, left, and right used in the present utility model are only relative to the mutual positional relationship of the components of the present utility model in the drawings.

[0049] The above embodiments are only for illustrating the technical concept and features of the present utility model, and are a preferred embodiment. The purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly, and it cannot be used to limit the protection scope of the present utility model. All equivalent transformations or modifications made according to the principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A circuit board module for electric power equipment, comprising a first circuit board, a second circuit board and a plurality of components arranged on the first circuit board or the second circuit board, characterized in that: The multiple components include a first component and a second component, the weight and / or volume of the first component is greater than that of the second component, the first component is only arranged on the first circuit board, and the second component is arranged on the first circuit board and / or the second circuit board; the first circuit board and the second circuit board intersect, and the second circuit board is arranged on the first circuit board to be supported by the first circuit board, and the circuit layer on the first circuit board and the circuit layer on the second circuit board are directly contacted and connected or connected through an electrical connector.

2. The circuit board module according to claim 1, characterized in that: The second circuit board is inserted into the first circuit board.

3. The circuit board module according to claim 2, characterized in that: The first circuit board is provided with a plug hole, and a side edge of the second circuit board is plugged into the plug hole.

4. The circuit board module according to claim 3, characterized in that: The included angle between the second circuit board and the first circuit board as a whole is 90±5 degrees.

5. The circuit board module according to any one of claims 1 to 4, characterized in that: The second circuit board is provided with a plurality of pins, and the pins are welded to the circuit layer of the first circuit board.

6. The circuit board module according to claim 1, characterized in that: The first circuit board and the second circuit board are mechanically connected and conductive via an electrical connector, the electrical connector comprising a male connector and a female connector, one of the male connector and the female connector being arranged on the first circuit board, and the other being arranged on the second circuit board, and the male connector and the female connector being plugged into each other to fix the second circuit board on the first circuit board and to conductively connect the circuit layer of the first circuit board and the circuit layer of the second circuit board to each other.

7. The circuit board module according to claim 6, characterized in that: The male connector and the female connector are both board-end connectors, one of which is fixed on the first circuit board and the other is fixed on the second circuit board. The male connector and the female connector are respectively provided with conductors forming a power flow path.

8. The circuit board module according to claim 1, characterized in that: The first components include film capacitors or relays; the second components include components constituting a control circuit, chips, chip resistors or chip capacitors; and a plurality of the second circuit boards are arranged on the first circuit board.

9. A photovoltaic inverter, comprising a box and a radiator arranged outside the box, characterized in that: The photovoltaic inverter also includes a circuit board module as described in any one of claims 1 to 8.

10. The photovoltaic inverter according to claim 9, characterized in that: The first circuit board includes an AC area and a DC area, and the second circuit board is arranged between the AC area and the DC area to separate the two areas; the PV input circuit, BOOST boost circuit, bus capacitor, inverter circuit, switch auxiliary circuit, AC output and its control circuit, or communication circuit of the photovoltaic inverter are arranged on the first circuit board, and the main control chip and sampling processing circuit of the photovoltaic inverter are arranged on the second circuit board.

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