CN220254369U - Inverter and power supply system - Google Patents

Abstract

The embodiment of the utility model relates to the technical field of power sources, and particularly discloses an inverter and a power source system. Through the mode, the circuit on the power board is split into the two parts which are distributed on the first circuit board and the second circuit board, so that the size of a single circuit board is reduced, the flatness of the first circuit board and the second circuit board can be improved, and the influence of the deformation of the circuit board on components of the power board is eliminated.

Description

Inverter and power supply system

Technical Field

The embodiment of the utility model relates to the technical field of power supplies, in particular to an inverter and a power supply system.

Background

The photovoltaic inverter may convert direct current (dc) power generated by a Photovoltaic (PV) solar panel into Alternating Current (AC) power for use by a power grid. The current photovoltaic inversion comprises a power board integrated with a boost circuit and an inverter circuit, and after the voltage of direct current generated by the photovoltaic solar panel is increased to a preset voltage by a boost inductor in the boost circuit, the direct current is converted into alternating current by an IGBT in the inverter circuit.

In some high-power photovoltaic inverters, the related electronic components are large in size, large in number and large in size, so that the whole deformation of the power board becomes large, and the requirements of the components on the power board on flatness cannot be met.

Disclosure of Invention

In view of the foregoing, embodiments of the present utility model provide an inverter and a power supply system that overcome or at least partially solve the foregoing problems.

In order to solve the technical problems, the utility model adopts a technical scheme that: the inverter comprises a shell, a power board and a boost inductor, wherein the shell is provided with a containing cavity; the power board set up in hold the chamber, the power board includes first circuit board, second circuit board and connecting piece, the one end of connecting piece with first circuit board electricity is connected, the second end of connecting piece with second circuit board electricity is connected.

Optionally, the inverter further includes a boost inductor, one end of the boost inductor is electrically connected with the first circuit board, and the other end of the boost inductor is electrically connected with the second circuit board.

Optionally, the first circuit board, the second circuit board and the boost inductor are sequentially arranged side by side, a first gap is formed between one surface of the first circuit board facing the bottom wall of the shell and the bottom wall of the shell, and a second gap is formed between one surface of the second circuit board facing the bottom wall of the shell and the bottom wall of the shell; the inverter further comprises a first wire and a second wire, wherein the first end of the first wire is connected with the first end of the boost inductor, and the first end of the second wire is connected with the second end of the boost inductor; and the second end of the first lead penetrates through the second gap and then is connected with the first circuit board at the first gap, and the second end of the second lead is inserted into the second gap and then is connected with the second circuit board.

Optionally, the inverter further comprises an insulating plate, the insulating plate is located between the power board and the first wire and between the power board and the second wire, and the insulating plate is used for separating the first wire and the second wire from the power board.

Optionally, the inverter further includes a heat radiator, the heat radiator is fixed on one surface of the bottom wall of the housing facing away from the accommodating cavity, the bottom wall of the housing is further provided with a heat dissipation window, the heat dissipation window is aligned with the first circuit board, and the heat dissipation window exposes the heat radiator toward the surface of the bottom wall of the housing.

Optionally, the surface of the first circuit board facing the radiator is provided with an IGBT, and one end of the IGBT facing away from the first circuit board passes through the heat dissipation window and then is adhered to the surface of the radiator facing the accommodating cavity.

Optionally, the radiator is towards the surface of holding the chamber is provided with first support column, first support column is kept away from the one end of radiator passes behind the heat dissipation window with first circuit board is connected, the diapire of casing is provided with the second support column, the second support column is kept away from the one end of the diapire of casing with the second circuit board is connected.

Optionally, the inverter further includes a first connection terminal, a second connection terminal, and a fixing base, where the fixing base is fixed on a surface of the bottom wall of the housing facing the accommodating cavity, a first end of the fixing base is located in the first gap, and a second end of the fixing base is located in the second gap; the first binding post is fixed in the first end of fixing base, the first end of first binding post with first circuit board is connected, the second end of first binding post with the second end of first wire is connected, the second binding post is fixed in the second end of fixing base, the first end of second binding post with the second circuit board is connected, the second end of first binding post with the second end of second wire is connected.

Optionally, the first circuit board is close to the one end of second circuit board is provided with first via hole, first via hole runs through first circuit board, the second circuit board is close to the one end of first circuit board is provided with the second via hole, the second via hole runs through the second circuit board, the dc-to-ac converter still includes first bolt and second bolt, the first end of first binding post is provided with first screw, the first end of second binding post is provided with the second screw, first bolt pass behind the first via hole spiro union in first screw, in order will first terminal with first circuit board electricity is connected, the second bolt pass behind the second via hole spiro union in second screw, in order will second terminal with second circuit board electricity is connected.

Optionally, the first circuit board is flexibly connected with the second circuit board through the connecting piece.

In order to solve the technical problems, the utility model adopts another technical scheme that: there is provided a power supply system including the inverter described above.

The embodiment of the utility model has the beneficial effects that: unlike the prior art, the inverter provided by the embodiment of the utility model comprises a shell and a power board, wherein the shell is provided with a containing cavity; the power board set up in hold the chamber, the power board includes first circuit board, second circuit board and connecting piece, the one end of connecting piece with first circuit board electricity is connected, the second end of connecting piece with second circuit board electricity is connected. Through the mode, the circuit on the power board is split into the two parts which are distributed on the first circuit board and the second circuit board, so that the size of a single circuit board is reduced, the flatness of the first circuit board and the second circuit board can be improved, and the influence of the deformation of the circuit board on components of the power board is eliminated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is an exploded view of an inverter according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a combination of a bottom wall and a side wall of a housing of an inverter according to an embodiment of the present utility model;

fig. 3 is an exploded view of a power board and boost inductor of an inverter provided by an embodiment of the present utility model;

fig. 4 is an enlarged view at a of fig. 3;

fig. 5 is an enlarged view at B of fig. 3;

fig. 6 is an enlarged view at C of fig. 3;

fig. 7 is a schematic cross-sectional view of an inverter according to an embodiment of the utility model;

fig. 8 is an enlarged view at D of fig. 7;

fig. 9 is an enlarged view at E of fig. 7;

fig. 10 is a schematic view of an insulating board of an inverter according to an embodiment of the present utility model.

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, an inverter 1000 includes a housing 1, a power board 2, and a boost inductor 3. The housing 1 serves to fix and protect various components of the inverter 1000. The power board 2 is fixed to the housing 1, and the power board 2 is a core member of the inverter 1000 for realizing an inversion function. The boost inductor 3 is electrically connected to the power board 2, and the boost inductor 3 is used to boost the voltage of the input current to the voltage required by the inverter circuit of the power board 2. To facilitate a better understanding of the inverter 1000, a specific structure of each constituent part of the inverter 1000 will be described next in connection with specific embodiments.

For the above-described case 1, referring to fig. 1 and 2, the case 1 is provided with a housing chamber 11, and the housing chamber 11 is used for housing components of the inverter 1000. Specifically, in the present embodiment, the housing 1 includes a bottom wall 12, a side wall 13, and a cover plate 14, the side wall 13 is disposed around the periphery of the bottom wall 12, an opening is formed at one end of the side wall 13 away from the bottom wall 12, and the cover plate 14 covers the opening. The bottom wall 12 is further provided with a through hole 121, the through hole 121 penetrating the bottom wall 12.

For the above-mentioned power board 2, referring to fig. 1, 3 and 4, the power board 2 is disposed in the accommodating cavity 11, and the power board 2 includes a first circuit board 21, a second circuit board 22 and a connecting member 23. The connection member 23 is made of a conductive material, and the first circuit board 21 and the second circuit board 22 are electrically connected through the connection member 23. The circuit on the power board 2 is split into two parts which are distributed on the first circuit board 21 and the second circuit board 22, so that the size of a single circuit board is reduced, the flatness of the first circuit board 21 and the second circuit board 22 can be improved, and the influence of the deformation of the circuit board on components of the power board 2 is eliminated. Specifically, in the present embodiment, the first circuit board 21 and the second circuit board 22 are parallel to the bottom wall 12, and the first circuit board 21 and the second circuit board 22 are disposed side by side therebetween. The first circuit board 21 is provided with a first binding post 211 and a first via 212, the first binding post 211 being provided with a threaded hole; the second circuit board 22 is provided with a second post 221 and a second via hole 222, and the second post 221 is provided with a threaded hole. The two ends of the connecting member 23 are respectively provided with bolt holes, and the two ends of the connecting member 23 are respectively screwed to the first binding post 211 and the second binding post 221, so that the first circuit board 21 is electrically connected with the second circuit board 22 through the connecting member 23.

Because of assembly errors and part machining dimensional errors, stress exists at the connection parts of the connecting piece 23 and the first circuit board 21 and the second circuit board 22, and in order to eliminate the influence of the stress on components on the power board 2, further, in the embodiment, the connecting piece 23 is a soft copper bar, and the first circuit board 21 and the second circuit board 22 are in soft connection through the connecting piece 23.

For the boost inductor 3, referring to fig. 2, 3 and 5, in the present embodiment, one end of the boost inductor 3 is electrically connected to the first circuit board 21, the other end of the boost inductor 3 is electrically connected to the second circuit board 22, and a closed loop is formed among the circuits on the first circuit board 21, the boost inductor 3, the circuits on the second circuit board 22 and the connecting member 23. Specifically, the boost inductor 3 is fixed on a side of the bottom wall 12 facing away from the accommodating cavity 11, the boost inductor 3 is aligned with the through hole 121, and the connection terminal 31 at the input end and the connection terminal 32 at the output end of the boost inductor 3 are inserted into the accommodating cavity 11 through the through hole 121. The inverter 1000 further comprises a connection assembly 4, the connection assembly 4 is used for connecting the power board 2 and the boost inductor 3, and the connection assembly 4 comprises a first connection terminal 41, a second connection terminal 42, a first wire 43, a second wire 44, a first bolt 45 and a second bolt 46. The first connection terminal 41 includes a first screw portion 411 and a first crimp portion 412, the first screw portion 411 being provided with a first screw hole 411a; the second connection terminal 42 includes a second screw portion 421 and a second crimp portion 422, and the second screw portion 421 is provided with a second screw hole 421a. A first end of the first wire 43 is connected with the connecting terminal 32 of the output end of the boost inductor 3, a second end of the first wire 43 is fixedly connected with the first compression joint part 412 in a compression joint mode, and the first bolt 45 passes through the first through hole 212 and is then connected with the first threaded hole 411a in a threaded mode so as to electrically connect the first wire 43 with the first circuit board 21; the first end of the second wire 44 is connected to the connection terminal 31 at the input end of the boost inductor 3, the second end of the second wire 44 is press-connected and fixed to the second press-connection portion 422, and the second bolt 46 passes through the second via hole 222 and is then screw-connected to the second threaded hole 421a, so as to electrically connect the second wire 44 to the second circuit board 22.

It is understood that in other low-power inverters, the boost inductor is not limited to a separate arrangement, and the boost inductor may be integrally disposed on the first circuit board or the second circuit board.

Since the first and second wires 43 and 44 for connection with the boost inductors 3 have a large wire diameter in actual use, and one inverter 1000 may be generally provided with a plurality of boost inductors 3 to constitute a plurality of boost circuits with the first and second circuit boards 21 and 22, a plurality of first and second wires 43 and 44 are provided accordingly. In order to avoid interference between the first conductive wire 43 and the second conductive wire 44 and other components in the accommodating cavity 11, further referring to fig. 3 and 7-9, in this embodiment, a first gap a is formed between a side of the first circuit board 21 facing the bottom wall 12 and the bottom wall 12, and a second gap b is formed between a side of the second circuit board 22 facing the bottom wall 12 and the bottom wall 12, where the first gap a and the second gap b are used for accommodating the first conductive wire 43 and the second conductive wire 44. Specifically, in some embodiments, the inverter 1000 further includes a first support column 5 and a second support column 6, one end of the first support column 5 is connected to the bottom wall 12, the other end of the first support column 5 is connected to the first circuit board 21, and the first support column 5 is used for supporting the first circuit board 21 so as to form a first gap a between the first circuit board 21 and the bottom wall 12; one end of the second support column 6 is connected to the bottom wall 12, the other end of the second support column 6 is connected to the second circuit board 22, and the second support column 6 is used for supporting the second circuit board 22 so as to form a second gap b between the second circuit board 22 and the bottom wall 12. The first via hole 212 is disposed at an edge of the first circuit board 21 near the second circuit board 22, the second via hole 222 is disposed at an edge of the second circuit board 22 near the first circuit board 21, along the direction of the boost inductor 3 toward the first circuit board 21, the second end of the first wire 43 passes through the second gap b, the first connection terminal 41 is inserted into the first gap a, the first connection terminal 41 is connected with the first circuit board 21, the second end of the second wire 44 is inserted into the second gap b, and the second connection terminal 42 is connected with the second circuit board 22.

In order to fix the first wire 43 and the second wire 44, so as to avoid loosening at the connection between the first wire 43 and the first circuit board 21 and at the connection between the second wire 44 and the second circuit board 22 caused by shaking of the first wire 43 and the second wire 44, further, referring to fig. 3 and fig. 5-7, in this embodiment, the inverter 1000 further includes a fixing base 7, the fixing base 7 is fixed to the bottom wall 12, a first end of the fixing base 7 is located in the first gap a, a second end of the fixing base 7 is located in the second gap b, a first fixing groove 71 is provided at a first end of the fixing base 7, a second fixing groove 72 is provided at a second end of the fixing base 7, a second end of the first connection terminal 41 and a second end of the first wire 43 are fixed to the first fixing groove 71, and a second end of the second connection terminal 42 and a second end of the second wire 44 are fixed to the second fixing groove 72.

In order to avoid the insulating skins of the first and second wires 43 and 44 from being scratched by the pins of the components on the first and second circuit boards 21 and 22, further referring to fig. 8 and 10, in the present embodiment, the inverter 1000 further includes an insulating plate 8, the insulating plate 8 being located in the first and second gaps a and b, the insulating plate 8 separating the first wires 43 from the first and second circuit boards 21 and 22, and separating the second wires 44 from the second circuit board 22.

In the inverter 1000, the IGBT (insulated gate bipolar transistor) 213 is a power component of a core, the IGBT213 has a high requirement for flatness of a substrate of a circuit board, and the higher the flatness is, the higher the production cost of the circuit board is. In order to save the production cost, referring to fig. 2, 3, 7 and 9, in the present embodiment, the IGBTs 213 of the inverter 1000 are disposed on the first circuit board 21, and specifically, the IGBTs 213 are disposed on a surface of the first circuit board 21 facing the bottom wall 12. Since the IGBT213 generates more heat during operation, in order to dissipate heat of the IGBT213, further, in this embodiment, the bottom wall 12 is further provided with a heat dissipation window 122, the heat dissipation window 122 is aligned with the first circuit board 21, the inverter 1000 further includes the heat sink 9, the heat sink 9 is fixed on a surface of the bottom wall 12 of the housing 1 facing away from the accommodating cavity 11, the heat dissipation window 122 exposes the heat sink 9 toward the surface of the accommodating cavity 11 of the housing 1, and one end of the IGBT213 facing away from the first circuit board 21 is adhered to the surface of the heat sink 9 facing toward the accommodating cavity 11 after passing through the heat dissipation window 122. It will be appreciated that since the IGBT213 is adhered to the surface of the heat sink 9 facing the accommodating chamber 11, the surface of the heat sink 9 facing the bottom wall 12 is also required to have a high flatness, and in particular, in the present embodiment, the flatness of the surface of the heat sink 9 facing the bottom wall 12 is set to not more than 0.05mm. Since the surface of the heat sink 9 facing the accommodating cavity 11 has a high flatness, in this embodiment, the first support column 5 is fixed to the surface of the heat sink 9 facing the accommodating cavity 11, and thus, the surface of the first circuit board 21 on which the IGBT213 is disposed and the surface of the heat sink 9 facing the accommodating cavity 11 are kept as parallel as possible, so that the IGBT213 is better adhered to the surface of the heat sink 9.

The inverter 1000 provided by the embodiment of the utility model comprises a shell 1 and a power board 2, wherein the shell 1 is provided with a containing cavity 11; the power board 2 is disposed in the accommodating cavity 11, the power board 2 includes a first circuit board 21, a second circuit board 22, and a connecting member 23, one end of the connecting member 23 is electrically connected to the first circuit board 21, and a second end of the connecting member 23 is electrically connected to the second circuit board 22. By the above mode, the circuit on the power board 2 is split into two parts which are distributed on the first circuit board 21 and the second circuit board 22, so that the size of a single circuit board is reduced, the flatness of the first circuit board 21 and the second circuit board 22 can be improved, and the influence of the deformation of the circuit board on components of the power board 2 is eliminated.

The embodiment of the present utility model further provides a power supply system, including the above-mentioned inverter 1000, and the structure and the function of the inverter 1000 are referred to the above-mentioned embodiment, and are not described herein again.

It should be noted that the description of the present utility model and the accompanying drawings illustrate preferred embodiments of the present utility model, but the present utility model may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, which are not to be construed as additional limitations of the utility model, but are provided for a more thorough understanding of the present utility model. The above-described features are further combined with each other to form various embodiments not listed above, and are considered to be the scope of the present utility model described in the specification; further, modifications and variations of the present utility model may be apparent to those skilled in the art in light of the foregoing teachings, and all such modifications and variations are intended to be included within the scope of this utility model as defined in the appended claims.

Claims (11)

1. An inverter, comprising:

a housing provided with a receiving cavity;

the power board, the power board set up in hold the chamber, the power board includes first circuit board, second circuit board and connecting piece, the one end of connecting piece with first circuit board electricity is connected, the second end of connecting piece with second circuit board electricity is connected.

2. The inverter according to claim 1, wherein,

the circuit board is characterized by further comprising a boost inductor, one end of the boost inductor is electrically connected with the first circuit board, and the other end of the boost inductor is electrically connected with the second circuit board.

3. The inverter according to claim 2, wherein,

the first circuit board, the second circuit board and the boost inductor are sequentially arranged side by side, a first gap is formed between one surface of the first circuit board, which faces the bottom wall of the shell, and a second gap is formed between one surface of the second circuit board, which faces the bottom wall of the shell, and the bottom wall of the shell;

the inverter further comprises a first wire and a second wire, wherein the first end of the first wire is connected with the first end of the boost inductor, and the first end of the second wire is connected with the second end of the boost inductor;

and the second end of the first lead penetrates through the second gap and then is connected with the first circuit board at the first gap, and the second end of the second lead is inserted into the second gap and then is connected with the second circuit board.

4. The inverter according to claim 3, wherein,

the power board is characterized by further comprising an insulating board, wherein the insulating board is positioned between the power board and the first wire and between the power board and the second wire, and the insulating board is used for separating the first wire and the second wire from the power board.

5. The inverter according to claim 4, wherein,

the heat radiator is fixed on one surface of the bottom wall of the shell, which faces away from the accommodating cavity, and a heat radiation window is further arranged on the bottom wall of the shell and aligned with the first circuit board, and the heat radiation window exposes the surface of the bottom wall of the shell, which faces the heat radiator.

6. The inverter according to claim 5, wherein,

the surface of the first circuit board facing the radiator is provided with an IGBT, and one end of the IGBT, which is opposite to the first circuit board, penetrates through the heat dissipation window and then is adhered to the surface of the radiator facing the accommodating cavity.

7. The inverter according to claim 5, wherein,

the radiator is provided with first support column towards the surface that holds the chamber, first support column is kept away from the one end of radiator passes behind the heat dissipation window with first circuit board is connected, the diapire of casing is provided with the second support column, the second support column is kept away from the one end of the diapire of casing with the second circuit board is connected.

8. The inverter according to claim 3, wherein,

the inverter further comprises a first wiring terminal, a second wiring terminal and a fixing seat, wherein the fixing seat is fixed on one face, facing the accommodating cavity, of the bottom wall of the shell, the first end of the fixing seat is located in the first gap, and the second end of the fixing seat is located in the second gap;

the first binding post is fixed in the first end of fixing base, the first end of first binding post with first circuit board is connected, the second end of first binding post with the second end of first wire is connected, the second binding post is fixed in the second end of fixing base, the first end of second binding post with the second circuit board is connected, the second end of first binding post with the second end of second wire is connected.

9. The inverter according to claim 8, wherein,

a first via hole is arranged at one end of the first circuit board, which is close to the second circuit board, the first via hole penetrates through the first circuit board, a second via hole is arranged at one end of the second circuit board, which is close to the first circuit board, the second via hole penetrates through the second circuit board,

the inverter further comprises a first bolt and a second bolt, a first screw hole is formed in the first end of the first wiring terminal, a second screw hole is formed in the first end of the second wiring terminal, the first bolt penetrates through the first through hole and then is connected with the first screw hole in a threaded mode, the first wiring terminal is electrically connected with the first circuit board, and the second bolt penetrates through the second through hole and then is connected with the second screw hole in a threaded mode, so that the second wiring terminal is electrically connected with the second circuit board.

10. The inverter according to any one of claims 1 to 9, wherein,

the first circuit board is in flexible connection with the second circuit board through the connecting piece.

11. A power supply system comprising an inverter as claimed in any one of claims 1-10.