Inverter and solar power generation system

Abstract

The present application provides an inverter and a photovoltaic power generation system. The inverter includes a housing and a first connector, a circuit board is disposed inside the housing, and an inverter circuit is disposed in the circuit board. The first connector includes a first housing and a first conductive core, the first housing is fixed to the housing, the first conductive core is disposed in the first housing and extends inside the housing, and the first conductive core includes a first connection plate located inside the housing, the first connection plate is a flat structure, the first connection plate is fixed to the circuit board and electrically connected to the inverter circuit. Since the first connection plate is disposed as a flat structure and the first connection plate can be connected to the circuit board without a cable, the connection between the first connector and the circuit board is more convenient, the contact resistance is smaller, and the installation efficiency, space utilization rate, and safety of the inverter are improved.

Description

[Technical field]

[0001] This application claims priority to Chinese Patent Application No. 202220304849.8, entitled “INVERTER AND PHOTOVOLTAIC SYSTEM,” filed with the China National Intellectual Property Office on February 15, 2022, which is incorporated herein by reference in its entirety.

[0002] The present application relates to the field of photovoltaic technology, in particular to inverters and photovoltaic power systems. [Background technology]

[0003] In a photovoltaic power generation system, the electrical energy of a photovoltaic module needs to be transferred to an inverter to perform current reversal, so that the electrical energy can be input to an end user or supplied to a grid. A male connector can be installed on the photovoltaic module side, and a female connector can be installed on the inverter end. After connecting the male connector to the female connector, the electrical connection between the photovoltaic module and the inverter can be performed. In practical application, at the inverter end, the conductive core of the connector is electrically connected to a circuit board in the inverter through a section of a cable. The cable needs to be electrically connected to both the conductive core and the circuit board. Therefore, the installation procedure is complicated, and connection reliability problems may occur. In the existing method, a connection terminal is placed on the end of the conductive core, and the connection terminal is inserted into the circuit board to perform the electrical connection without a cable. However, the connection stability of the connection terminal inserted into the circuit board is poor, and an additional connection mechanism is required to connect the conductive core and the circuit board, which makes the structure complicated. Summary of the Invention

[0004] The present application provides an inverter that does not require a cable and can improve the stability of the connection between the connector and the circuit board.

[0005] According to a first aspect, an embodiment of the present application provides an inverter. The inverter includes a housing and a first connector, a circuit board is disposed inside the housing, and an inverter circuit is disposed on the circuit board. The first connector includes a first housing and a first conductive core, the first housing is fixed to the housing, the first conductive core is located in the first housing and extends inside the housing, the first conductive core includes a first connection plate located inside the housing, the first connection plate has a flat structure, the first connection plate is fixed to the circuit board and electrically connected to the inverter circuit, an end of the first conductive core away from the first connection plate is configured to connect to a photovoltaic module, the first conductive core is configured to transmit a direct current generated by the photovoltaic module to the inverter circuit using the first connection plate, the inverter circuit converts the direct current to an alternating current, and the flat structure is configured to improve connection stability and current transmission stability when the first connection plate is fixed to the circuit board.

[0006] The first housing of the first connector is configured to protect the first conductive core and to secure the first conductive core to the housing. The first conductive core of the first connector is configured to transmit electricity and transmit direct current from the photovoltaic module to an inverter circuit on the circuit board, where the inverter is configured to convert the direct current to alternating current.

[0007] In one embodiment, the first conductive core is in the form of a straight strip, and the part of the first conductive core that is away from the first connection plate is in the form of a hollow cylinder. The first connection plate has a flat structure, which increases the contact area between the first connection plate and the circuit board, makes it easier to fix the first connection plate to the circuit board, ensures good electrical connection between the first connection plate and the circuit board, and improves connection stability and electrical transmission stability. In one embodiment, the first connection plate is welded to the circuit board. Due to the flat structure of the first connection plate, the first connection plate and the circuit board each have a large welding area, which provides welding stability. In one embodiment, the plane on which the first connection plate is located is parallel to the board surface of the circuit board, which improves the stability and reliability of the connection between the first connection plate and the circuit board.

[0008] In a possible embodiment, the first connection plate and the circuit board are stacked in a first direction, at least a part of the projection of the first connection plate on the circuit board in the first direction is located on the circuit board, and the first connection plate and the circuit board have a partial intersection in a second direction, shortening the distance between the first connection plate and the circuit board in the second direction, and the first direction is perpendicular to the second direction. The first connection plate can be directly connected to the circuit board in the second direction without disposing a cable between the circuit board and the first connection plate in the second direction. Also, since the distance between the first connection plate and the circuit board is shortened, the current output from the first connection plate can be directly input to the circuit board, thereby effectively shortening the length of the current input path of the inverter and reducing the interference caused by the environment on the current input of the inverter.

[0009] In one embodiment, the first direction is along the thickness of the inverter and the second direction is along the width of the inverter.

[0010] In one embodiment, the orthogonal projection of the first connecting plate on the circuit board may be located outside the circuit board, and the first connecting plate may be connected to the circuit board using a connecting part.

[0011] In one embodiment, the first connecting plate is formed by stretching the end of the first conductive core, which can save preparation costs. In one embodiment, the first conductive core is formed by integral machining or integral injection molding.

[0012] The first housing is secured to the housing using screws, by welding, etc. In one embodiment, the first housing extends to the inside of the housing and the first housing is secured to the housing using a screw nut. The first housing encases a portion of the first conductive core that is located outside the housing, and the first conductive core is secured to the housing by being secured to the first housing.

[0013] The existing MC4 connector or imitation MC4 connector on the market includes a male connection part and a female connection part that are detachably connected. The end of the male connection part that is away from the female connection part is connected to a circuit board, and the end of the female connection part that is away from the male connection part is connected to a photovoltaic module. Alternatively, the end of the female connection part that is away from the male connection part is connected to a circuit board, and the end of the male connection part that is away from the female connection part is connected to a photovoltaic module. In one embodiment, the end of the conductive core of the existing male connection part or female connection part on the market is processed, such as punching and rolling, so that the end of the conductive core has a flat structure, to manufacture the first connector.

[0014] In the prior art, the MC4 connector or imitation MC4 connector is directly connected to the circuit board through a cable. Due to the limited internal space of the inverter, the bending radius of the cable does not meet the standard, the internal cables of the inverter are messy, the installation of the inverter is difficult, the installation efficiency is reduced, and the problem of improper connection occurs. When the inverter is connected to multiple MC4 or imitation MC4 connectors of multiple photovoltaic modules, more cables are needed inside the inverter to connect the MC4 or imitation MC4 connector to the circuit board, so the cables inside the inverter are messy and the installation of the inverter is more difficult. In addition, both ends of the cable require OT terminals to connect to the circuit board and the MC4 connector respectively, which increases the contact resistance and heat of the entire loop and reduces the efficiency of the entire inverter.

[0015] However, in the present application, the first connection plate of the first connector is arranged as a flat structure, and the first connection plate can be directly connected to the circuit board. In one aspect, the connection between the first connector and the circuit board is more convenient, and the installation of the inverter is more simple and more efficient. In another aspect, the first connector is connected to the circuit board without a cable, so that the contact resistance and heat between the first connector and the circuit board are reduced, and the work efficiency of the inverter is improved. In addition, the effect of poor contact between the first connector and the circuit board in the processing, transportation, and assembly process can be reduced, and the risk of excessive heat or even fire caused by long-term connection between the first connector and the circuit board is reduced. In yet another aspect, the distance between the first connection plate and the circuit board is shortened, so that the space of the connection joint between the first connection plate and the circuit board is saved, the space utilization rate and power density of the inverter are improved, and the length of the photovoltaic power input path is effectively shortened, and the interference caused by the environment on the photovoltaic power input is reduced.

[0016] In a possible embodiment, the opening is disposed in the first connection plate, and the inverter further includes a fixing member, which passes through the opening and is fixed to the circuit board to fix the first connection plate to the circuit board. The opening is disposed such that the connection between the first connection plate and the circuit board is simpler and more convenient.

[0017] In one embodiment, the shape of the opening may be a round hole, an elliptical hole, a square hole, a U-shaped notch, or any other suitable shape. In one embodiment, the fixing member may be a screw, a snap fit, or the like. In one embodiment, the shape of the opening is a round hole, the fixing member is a corresponding threaded bolt and a threaded nut, and a hole through the circuit board is disposed on the circuit board. The threaded bolt passes through the opening, the hole, and the threaded nut in sequence to fix the first connection plate to the circuit board.

[0018] In a possible embodiment, the connection terminal is disposed on the circuit board, the first connection plate, the connection terminal, and the circuit board are stacked in order in a first direction, the first direction being perpendicular to the circuit board, the connection terminal is fixed to the circuit board and electrically connected to the circuit board, the pore channel is disposed on the connection terminal, and the opening is disposed on the first connection plate. The inverter further includes a fixing member, which passes through the opening and extends into the pore channel in the first direction to fix the first connection plate to the connection terminal. The connection terminal is disposed so that the connection between the first connection plate and the circuit board is simpler and more convenient. In one embodiment, a screw thread is disposed on the pore channel, and the fixing member is a screw, and the screw and the screw thread cooperate with each other to more securely fix the first connection plate to the connection terminal.

[0019] In one embodiment, the socket is disposed on the circuit board, the socket is electrically connected to the circuit board, the first connection plate is inserted into the socket and electrically connected to the socket, and the first connection plate is further electrically connected to the circuit board. The internal structure of the socket is not limited, but as long as the first connection plate is inserted into the socket, the first connection plate can be fixed to the socket and electrically connected to the socket.

[0020] In a possible embodiment, the first conductive core includes a first conductive core body and a first connecting plate, the first conductive core body passes through the outside and inside of the housing, the first connecting plate is located at an end of the first conductive core body, and the extension direction of the first connecting plate is the same as the extension direction of the first conductive core body, facilitating processing of the first conductive core.

[0021] In a possible embodiment, the first conductive core includes a first conductive core body and a first connection plate, the first conductive core body passes through the outside and inside of the housing, the first connection plate is located at the end of the first conductive core body, and the extension direction of the first connection plate intersects with the extension direction of the first conductive core body, so that the first conductive core can adapt to a plurality of installation environments. In one embodiment, the first connection plate is linear, and the included angle between the first connection plate and the first conductive core body is greater than 0° and less than 180°. In one embodiment, the first connection plate is arc-shaped.

[0022] In a possible embodiment, the first conductive core further includes a first connection section, the first connection section is located between the first conductive core body and the first connection plate, and the extension direction of the first connection section intersects both the extension direction of the first conductive core body and the extension direction of the first connection plate, so that the first conductive core can adapt to multiple installation environments. In one embodiment, the included angle between the first connection section and the first conductive core body is greater than 0° and less than 180°, the included angle between the first connection section and the first connection plate is greater than 0° and less than 180°, and the first conductive core is "Z" shaped.

[0023] In one embodiment, the inverter includes two first connectors, the first conductive core of one first connector is "Z" shaped, the first conductive core of the other first connector is straight, and the first conductive cores of the two first connectors are staggered, which can save space in the inverter.

[0024] In a possible embodiment, the first connector further includes an insulating portion that covers an outer surface of the first connection section and insulates and isolates the first connection section from the external environment, thereby reducing the risk of a short circuit occurring at the first connection section.

[0025] In a possible embodiment, the first conductive core body and the first connecting plate are of one piece structure, which improves the connection strength between the first conductive core body and the first connecting plate and extends the service life of the first connector.

[0026] In a possible embodiment, the inverter further includes a temperature sensor, the temperature sensor being located on the circuit board and located on the peripheral side of the first connection plate, the temperature sensor being configured to monitor the temperature of the first connection plate. The temperature sensor may be a thermistor, a thermocouple, etc., and is configured to monitor the temperature of the first connection plate to prevent the inverter from overheating or even catching fire due to poor contact caused by improper installation. In one embodiment, the temperature sensor is located on the peripheral side of the location where the first connection plate is connected to the connection terminal.

[0027] In a possible embodiment, the inverter further includes a second connector, the second connector including a second housing and a second conductive core, the second housing fixed to the outside of the housing, the second conductive core located within the second housing and extending to the inside of the housing, the second conductive core including a second connection plate located inside the housing, the second connection plate being a flat structure, the second connection plate being fixed to the circuit board and electrically connected to the negative terminal of the inverter circuit, at least a part of the orthogonal projection of the second connection plate on the circuit board being located on the circuit board, and the first connection plate being electrically connected to the positive terminal of the inverter circuit.

[0028] The negative terminal of the inverter circuit is an end of the inverter circuit that is connected to the negative terminal of the photovoltaic power generation module, and the positive terminal of the inverter circuit is an end of the inverter circuit that is connected to the positive terminal of the photovoltaic power generation module, and the inverter circuit and the photovoltaic power generation module form a loop. Current flows from the positive terminal of the photovoltaic power generation module to the positive terminal of the inverter circuit, the first connector is located between the positive terminal of the photovoltaic power generation module and the positive terminal of the inverter circuit on the circuit board, and the second connector is located between the negative terminal of the photovoltaic power generation module and the negative terminal of the inverter circuit on the circuit board.

[0029] In one embodiment, the end of the conductive core of an existing male connection part on the market is processed by punching, rolling, etc., so that the end of the conductive core has a flat structure, to manufacture the first connector. The end of the conductive core of an existing female connection part on the market is processed by punching, rolling, etc., so that the end of the conductive core has a flat structure, to manufacture the second connector. In one embodiment, the end of the conductive core of an existing female connection part on the market is processed by punching, rolling, etc., so that the end of the conductive core has a flat structure, to manufacture the first connector. The end of the conductive core of an existing male connection part on the market is processed by punching, rolling, etc., so that the end of the conductive core has a flat structure, to manufacture the second connector. Based on the existing male connection part and female connection part on the market, the first connector and the second connector can be obtained by direct and simple processing, so that the manufacturing process of the first connector and the second connector is simpler and the manufacturing cost is saved.

[0030] In one embodiment, the opening is disposed in the second connection plate, and the inverter further includes a fixing member, which passes through the opening and is fixed to the circuit board to fix the second connection plate to the circuit board. The opening is disposed such that the connection between the second connection plate and the circuit board is simpler and more convenient.

[0031] In a possible embodiment, the first connecting plate and the second connecting plate are arranged in a staggered manner so that the orthogonal projection of the first connecting plate on the circuit board does not overlap with the orthogonal projection of the second connecting plate on the circuit board, which makes it easier to install the first connector and the second connector on the circuit board, saves installation space on the circuit board, and allows multiple connectors to be arranged as closely together as possible.

[0032] In one embodiment, the first connection plate and the second connection plate are located on the same side of the circuit board in the first direction. In one embodiment, the first connection plate and the second connection plate are located on opposite sides of the circuit board in the first direction, respectively. In one embodiment, the first connection plate and the second connection plate are located on opposite sides of the circuit board in the first direction, and an orthogonal projection of the first connection plate on the circuit board at least partially overlaps with an orthogonal projection of the second connection plate on the circuit board.

[0033] In a possible embodiment, the inverter further includes a fixed base, the fixed base is located on the circuit board, the fixed groove is disposed on the fixed base, the connection piece is disposed in the fixed groove, one end of the connection piece is connected to the circuit board, and the other end of the connection piece is fixed and electrically connected to the second connection plate, the fixed base is configured to improve the stability of the connection between the plurality of first connectors and the plurality of second connectors and the circuit board, and to facilitate the installation and wiring connection of the inverter.

[0034] In one embodiment, the height of the fixed base in the first direction is higher than the height of the connection terminal in the first direction. In one embodiment, the second connector is directly electrically connected to the fixed base, and the first connector is electrically connected to the fixed base using a connection piece. The height of the fixed base in the first direction is higher than the height of the connection terminal in the first direction, so that the first connector and the second connector are staggered in the first direction. This helps to save installation space on the circuit board.

[0035] In one embodiment, a portion of the first connector is electrically connected directly to the fixed base and another portion of the first connector is electrically connected to the fixed base using a connecting piece, a portion of the second connector is electrically connected directly to the fixed base and another portion of the second connector is electrically connected to the fixed base using a connecting piece.

[0036] In a possible embodiment, the inverter further includes a third connector. The third connector is located at an end of the first connector that is away from the inverter, the third connector includes a third housing and a third conductive core, the third housing is fixed to the first housing, the third conductive core is electrically connected to the first conductive core, and the third connector is detachably connected to the first connector, facilitating assembly and disassembly of the inverter. The third conductive core is located within the third housing and extends outside the third housing in a direction away from the first connector, the third conductive core and the first conductive core are electrically connected to the third housing or electrically connected inside the first housing, and a portion of the third conductive core that is located outside the third housing is connected to the photovoltaic module via a cable.

[0037] In a possible embodiment, the inverter further includes a fourth connector. The fourth connector is located at an end of the second connector that is away from the inverter, the fourth connector includes a fourth housing and a fourth conductive core, the fourth housing is fixed to the second housing, and the fourth conductive core is electrically connected to the second conductive core. The fourth conductive core is located in the fourth housing and extends outside the fourth housing in a direction away from the second connector, the fourth conductive core and the second conductive core are electrically connected to the fourth housing or electrically connected inside the second housing, and a part of the fourth conductive core that is located outside the fourth housing is connected to the photovoltaic module via a cable. The design in which the fourth connector and the second connector are detachably connected facilitates assembly and disassembly of the photovoltaic power generation system.

[0038] An embodiment of the present application further provides an inverter, the inverter including a housing, a first connector, and a socket, the circuit board is disposed inside the housing, and the inverter circuit is disposed on the circuit board, the first connector includes a first housing and a first conductive core, the first housing is fixed to the housing, the first conductive core is located within the first housing and extends inside the housing, the socket is located on the circuit board and is electrically connected to the circuit board, an end of the first conductive core located inside the housing is inserted into and fixed to the socket, and the socket connects the first conductive core to the circuit board to reduce the distance between the first conductive core and the circuit board.

[0039] An end of the first conductive core away from the first connection plate is configured to connect to a photovoltaic module, and the first conductive core is configured to transmit direct current generated by the photovoltaic module to an inverter circuit using the first connection plate, which converts the direct current to alternating current.

[0040] In one embodiment, the shape of the end of the first conductive core that is connected to the socket matches the shape of the socket. The end of the first conductive core that is connected to the socket is a flat structure. In another embodiment, the end of the first conductive core that is connected to the socket is cylindrical, circular, or a three-dimensional column, etc., and the internal structure of the socket matches the shape of the first conductive core, thereby electrically connecting the first conductive core to the socket.

[0041] According to a second aspect, an embodiment of the present application provides a photovoltaic power generation system, the photovoltaic power generation system including a photovoltaic power generation module and the inverter according to any one of the above, the photovoltaic power generation module being electrically connected to an end of the first connector that is remote from the circuit board, and a direct current generated by the photovoltaic power generation module being transmitted to the inverter circuit using the first connection plate.

[0042] A filter circuit and a measurement circuit may be further disposed on the circuit board. After filtering and measuring the DC current of the photovoltaic power generation module by the filter circuit and the measurement circuit, the DC current of the photovoltaic power generation module is output as an AC current by using an inverter circuit. The photovoltaic power generation module includes a positive terminal and a negative terminal. Inside the photovoltaic power generation module, a current flows from the negative terminal of the photovoltaic power generation module to the positive terminal of the photovoltaic power generation module, and both the positive terminal and the negative terminal of the photovoltaic power generation module are connected to the circuit board. In one embodiment, a first connector is disposed between the positive terminal of the photovoltaic power generation module and the circuit board. In one embodiment, the inverter further includes a second connector, and the second connector is connected between the negative terminal of the photovoltaic power generation module and the circuit board. The photovoltaic power generation module includes at least one photovoltaic power generation panel, and the photovoltaic power generation panel is connected to the circuit board. In one embodiment, the photovoltaic module includes multiple photovoltaic panels connected in series, and the direct current of the multiple photovoltaic panels is converged in a series connection manner and then connected to an inverter circuit in a circuit board using a first connector.

[0043] In one embodiment, the first connector may be disposed between the negative terminal of the photovoltaic module and the circuit board instead. In one embodiment, the inverter includes two first connectors. One first connector is configured to be connected to the positive terminal of the circuit board, and the other first connector is configured to be connected to the negative terminal of the circuit board. In other words, the first connectors are disposed between the positive terminal of the photovoltaic module and the circuit board, and between the negative terminal of the photovoltaic module and the circuit board, and the photovoltaic module and the first connectors are electrically connected via cables.

[0044] In this application, the first connection plate of the first connector is arranged as a flat structure, and the first connection plate is directly connected to the circuit board. In one aspect, the connection between the first connector and the circuit board is more convenient, and the installation of the inverter is more simple and more efficient. In another aspect, the first connector is connected to the circuit board without a cable, so that the contact resistance and heat between the first connector and the circuit board are reduced, and the work efficiency of the inverter is improved. In addition, the effect of poor contact between the first connector and the circuit board in the processing, transportation, and assembly process can be reduced, and the risk of excessive heat or even fire caused by long-term connection between the first connector and the circuit board is also reduced. In yet another aspect, the distance between the first connection plate and the circuit board is shortened, so that the space of the connection joint between the first connection plate and the circuit board is saved, the space utilization rate and power density of the inverter are improved, and the length of the photovoltaic power input path is effectively shortened, and the interference caused by the environment on the photovoltaic power input is reduced. [Brief description of the drawings]

[0045] In order to describe the technical solutions in the embodiments of the present application more clearly, the following describes the accompanying drawings used to describe the embodiments of the present application. [Figure 1] 1 is a schematic diagram of the structure of a solar power generation system according to one embodiment of the present application. [Diagram 2] FIG. 2 is a schematic diagram of an inverter structure according to an embodiment of the present application; [Diagram 3] FIG. 2 is a schematic diagram of a structure of a first conductive core according to one embodiment of the present application. [Figure 4] FIG. 2 is a schematic diagram of a structure of a first conductive core according to one embodiment of the present application. [Diagram 5] FIG. 2 is a schematic diagram of a structure of a first conductive core according to one embodiment of the present application. [Figure 6] FIG. 2 is a schematic diagram of a structure of a first conductive core according to one embodiment of the present application. [Figure 7] FIG. 2 is a schematic diagram of a structure of a first conductive core according to one embodiment of the present application. [Figure 8] FIG. 2 is a schematic diagram of a structure of a first conductive core according to one embodiment of the present application. [Figure 9] FIG. 2 is a schematic diagram of a structure of a first conductive core according to one embodiment of the present application. [Figure 10] FIG. 2 is a schematic diagram of a partial structure of an inverter according to an embodiment of the present application. [Figure 11] FIG. 2 is a schematic diagram of a partial structure of an inverter according to an embodiment of the present application. [Figure 12] FIG. 2 is a schematic diagram of a partial structure of an inverter according to an embodiment of the present application. [Figure 13] FIG. 2 is a schematic diagram of a structure of a first conductive core according to one embodiment of the present application. [Figure 14] FIG. 2 is a schematic diagram of a structure of a first conductive core according to one embodiment of the present application. [Figure 15] FIG. 2 is a schematic diagram of a structure of a first conductive core according to one embodiment of the present application. [Figure 16] FIG. 2 is a schematic diagram of a structure of a first conductive core according to one embodiment of the present application. [Figure 17] FIG. 2 is a schematic diagram of a partial structure of an inverter according to an embodiment of the present application. [Figure 18] FIG. 2 is a schematic diagram of a partial structure of an inverter according to an embodiment of the present application. [Figure 19] FIG. 2 is a schematic diagram of a partial structure of an inverter according to an embodiment of the present application. [Figure 20] FIG. 2 is a schematic diagram of an inverter structure according to an embodiment of the present application; [Figure 21] FIG. 2 is an exploded view of an inverter according to an embodiment of the present application. [Figure 22] 1 is a schematic diagram of a structure of a first connector and a third connector according to an embodiment of the present application. [Figure 23] 1 is a schematic diagram of a structure of a second connector and a fourth connector according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0046] The following describes the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. It is obvious that the described embodiments are only a part, not all, of the embodiments of the present application.

[0047] In this specification, terms such as "first" and "second" are used for descriptive purposes only and should not be understood as an indication or implication of relative importance or an implicit indication of the quantity of the technical features depicted. Thus, a feature qualified by "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0048] Furthermore, location terms such as "upper" and "lower" are defined herein with respect to the location of structures in the accompanying drawings, and it should be understood that these location terms are relative concepts used for relative description and clarity, and may change accordingly as the location of the structures changes.

[0049] For ease of understanding, the following first explains and describes the English abbreviations and related technical terms in the embodiments of the present application.

[0050] Inverter: An inverter is a converter that converts direct current into constant frequency, constant voltage, or frequency modulated, voltage regulated, AC. In this embodiment, the function of the inverter is to convert the direct current generated by the solar panels (also called photovoltaic panels) into AC.

[0051] MC4 Connector: MC stands for Multi-Contact, and 4 indicates the diameter of the metal core. Multi-Contact is a Swiss company. MC4 connectors are designed to connect the key components of photovoltaics, such as photovoltaic modules, combiner boxes, and inverters.

[0052] FIG. 1 is a schematic diagram of a photovoltaic power generation system 1 according to an embodiment of the present application. The photovoltaic power generation system 1 includes an inverter 10 and a photovoltaic power generation module 20. The inverter 10 includes a housing 100 and a first connector 200, a circuit board 110 is disposed inside the housing 100, an inverter circuit (not shown in FIG. 1) is disposed on the circuit board 110, and the photovoltaic power generation module 20 is electrically connected to an end of the first connector 200 that is remote from the circuit board 110. The circuit board 110 may be an entire circuit block or may include multiple circuit sub-boards. The multiple circuit sub-boards are bonded to the circuit board 110. The function of each circuit sub-board may be set as needed, and the first connector 200 may be connected to one of the circuit sub-boards.

[0053] The inverter circuit is configured to invert the DC current of the photovoltaic power generation module 20 and output the DC current as an AC current. A filter circuit and a measurement circuit may be further disposed on the circuit board 110. After the DC current of the photovoltaic power generation module 20 is filtered and measured by the filter circuit and the measurement circuit, the DC current of the photovoltaic power generation module 20 is output as an AC current using the inverter circuit. The photovoltaic power generation module 20 includes a positive terminal and a negative terminal. Inside the photovoltaic power generation module 20, a current flows from the negative terminal of the photovoltaic power generation module 20 to the positive terminal of the photovoltaic power generation module 20, and both the positive terminal and the negative terminal of the photovoltaic power generation module 20 are connected to the circuit board 110. In one embodiment, the first connector 200 is disposed between the positive terminal of the photovoltaic power generation module 20 and the circuit board 110. In one embodiment, the inverter 10 further includes a second connector 400, and the second connector 400 is connected between the negative terminal of the photovoltaic power generation module 20 and the circuit board 110.

[0054] In one embodiment, the first connector 200 may instead be disposed between the negative terminal of the photovoltaic power generation module 20 and the circuit board 110. In one embodiment, the inverter 10 includes two first connectors 200. One first connector 200 is configured to be connected to the positive terminal of the circuit board 110, and the other first connector 200 is configured to be connected to the negative terminal of the circuit board 110. In other words, the first connector 200 is disposed between the positive terminal of the photovoltaic power generation module 20 and the circuit board 110, and between the negative terminal of the photovoltaic power generation module 20 and the circuit board 110. The photovoltaic power generation module 20 may be electrically connected to the first connector 200 via a cable.

[0055] The photovoltaic module 20 includes at least one photovoltaic panel 21, which is connected to a circuit board 110. In one embodiment, the photovoltaic module 20 includes a plurality of photovoltaic panels 21 connected in series, and the direct currents of the plurality of photovoltaic panels 21 are converged in a series connection manner and then connected to an inverter circuit in the circuit board 110 using a first connector 200.

[0056] Please refer to Figures 2 and 3. Figure 2 is a schematic diagram of an inverter 10 according to an embodiment of the present application. Figure 3 is a cross-sectional view of the inverter 10 of Figure 2. The inverter 10 includes a housing 100 and a first connector 200, a circuit board 110 is disposed inside the housing 100, and an inverter circuit (not shown) is disposed on the circuit board 110. The first connector 200 includes a first housing 210 and a first conductive core 220, the first housing 210 is fixed to the housing 100, and the first conductive core 220 is located within the first housing 210 and extends inside the housing 100. The first conductive core 220 includes a first connection plate 221 located inside the housing 100, the first connection plate 221 is a flat structure, the first connection plate 221 is fixed to the circuit board 110 and is electrically connected to the inverter circuit. The end of the first conductive core 220, which is the end away from the first connecting plate 221, is configured to be connected to the photovoltaic power generation module 20, the first conductive core 220 is configured to transmit the direct current generated by the photovoltaic power generation module 20 to an inverter circuit using the first connecting plate 221, and the inverter circuit converts the direct current into alternating current, and the flat structure of the first connecting plate 221 is configured to improve connection stability and current transmission stability when the first connecting plate 221 is fixed to the circuit board 110.

[0057] The first housing 210 of the first connector 200 is configured to protect the first conductive core 220 and to secure the first conductive core 220 to the housing 100. The first conductive core 220 of the first connector 200 is configured to transmit electricity and transmit a direct current of the photovoltaic power generation module 20 to an inverter circuit of the circuit board 100, which converts the direct current to an alternating current.

[0058] Please refer to Figures 4 and 5. Figure 4 is a top view of the first conductive core 220, and Figure 5 is a side view of the first conductive core 220. In this embodiment, the first conductive core 220 is in the shape of a straight strip, and the part of the first conductive core 220 that is away from the first connection plate 221 is in the shape of a hollow cylinder. The first connection plate 221 has a flat structure, which increases the contact area between the first connection plate 221 and the circuit board, makes it easier to fix the first connection plate 221 to the circuit board 110, ensures good electrical connection between the first connection plate 221 and the circuit board 110, and can improve the connection stability and electrical transmission stability. In one embodiment, the first connection plate 221 is welded to the circuit board 110. Due to the flat structure of the first connection plate 221, the respective welding areas of the first connection plate 221 and the circuit board 110 are large, thereby providing welding stability. In one embodiment, the plane on which the first connecting plate 221 is located is parallel to the board surface of the circuit board 110, thereby improving the stability and reliability of the connection between the first connecting plate 221 and the circuit board 110.

[0059] In a possible embodiment, the first connection plate 221 and the circuit board 110 are stacked in the first direction X, and at least a part of the orthogonal projection of the first connection plate 221 on the circuit board 110 in the first direction X is located on the circuit board 110. In this embodiment, the first connection plate 221 and the circuit board 110 are stacked in the first direction X, and at least a part of the orthogonal projection of the first connection plate 221 on the circuit board 110 is located on the circuit board 110. With this arrangement, the first connection plate 221 and the circuit board 110 can partially cross in the second direction Y to shorten the distance between the first connection plate 221 and the circuit board 110, and the first connection plate 221 can be directly connected to the circuit board 110 in the second direction Y, and there is no need to arrange a cable between the circuit board 110 and the first connection plate 221 in the second direction Y. In addition, since the distance between the first connection plate 221 and the circuit board 110 is shortened, the current output from the first connection plate 221 can be directly input to the circuit board 110, thereby effectively shortening the length of the current input path of the inverter 10 and reducing the interference caused by the environment on the current input of the inverter 10.

[0060] The first direction X intersects with the second direction Y. In this embodiment, the first direction X is the thickness direction of the inverter 10, the second direction Y is the width direction of the inverter 10, and the first direction X is perpendicular to the second direction Y.

[0061] In one embodiment, the orthogonal projection of the first connecting plate 221 on the circuit board 110 is located outside the circuit board 110, and the first connecting plate 221 may be connected to the circuit board 110 using a connecting part.

[0062] In one embodiment, the first connecting plate 221 is formed by stretching the end of the first conductive core 220, which can save preparation costs. In one embodiment, the first conductive core 220 is formed by integral machining or integral injection molding.

[0063] The first housing 210 is fixed to the housing 100 by using a screw, welding, or the like. Fig. 10 is an enlarged layout diagram of the first connector 200 and the peripheral portion of the first connector 200 in the inverter 10. In this embodiment, the first housing 210 extends to the inside of the housing 100, and the first housing 210 is fixed to the housing 100 by using a screw nut 120. The first housing 210 encloses a portion of the first conductive core 220 that is located outside the housing 100, and the first conductive core 220 is fixed to the housing 100 by being fixed to the first housing 210.

[0064] The existing MC4 connector or imitation MC4 connector on the market includes a male connection part and a female connection part that are detachably connected. The end of the male connection part that is away from the female connection part is connected to the circuit board 110, and the end of the female connection part that is away from the male connection part is connected to the photovoltaic power generation module 20. Alternatively, the end of the female connection part that is away from the male connection part is connected to the circuit board 110, and the end of the male connection part that is away from the female connection part is connected to the photovoltaic power generation module 20. In one embodiment, the end of the conductive core of the existing male connection part or female connection part on the market is processed, such as punching and rolling, so that the end of the conductive core has a flat structure, to manufacture the first connector 200.

[0065] In the prior art, the MC4 connector or imitation MC4 connector is directly connected to the circuit board 110 through a cable. Due to the limited internal space of the inverter 10, the bending radius of the cable does not meet the standard, and the internal cables of the inverter 10 are messy, which makes it difficult to install the inverter 10, reduces the installation efficiency, and causes the problem of poor connection. In particular, when the photovoltaic power generation system 1 has multiple photovoltaic power generation modules 20 and the inverter 10 is connected to multiple MC4 connectors or imitation MC4 connectors of the multiple photovoltaic power generation modules 20, more cables are required to connect the MC4 connector or imitation MC4 connector to the circuit board 110 inside the inverter 10, which makes the cables inside the inverter 10 messy and makes it more difficult to install the inverter 10. In addition, both ends of the cable require OT terminals to connect to the circuit board and the MC4 connector, respectively, which increases the contact resistance and heat of the entire loop and reduces the efficiency of the entire inverter.

[0066] In this application, the first connection plate 221 of the first connector 200 may be arranged as a flat structure, and the first connection plate 221 may be directly connected to the circuit board 110. In one aspect, the connection between the first connector 200 and the circuit board 110 is more convenient, and the installation of the inverter 10 is more simple and more efficient. In another aspect, since the first connector 200 is connected to the circuit board 110 without a cable, the contact resistance and heat between the first connector 200 and the circuit board 110 are reduced, and the work efficiency of the inverter 10 is improved. In addition, the effect of poor contact between the first connector 200 and the circuit board 110 in the processing, transportation, and assembly process can be reduced, and the risk of excessive heat or even fire caused by long-term connection between the first connector 200 and the circuit board 110 is reduced. In yet another aspect, the distance between the first connecting plate 221 and the circuit board 110 is shortened, thereby saving space at the connection joint between the first connecting plate 221 and the circuit board 110, improving the space utilization and power density of the inverter 10, effectively shortening the length of the solar power input path, and reducing the environmental interference on the solar power input.

[0067] 4 and 10, in a possible embodiment, an opening 222 (shown in FIG. 4) is disposed in the first connecting plate 221, and the inverter 10 further includes a fixing member 111 (shown in FIG. 10), which passes through the opening 222 and is fixed to the circuit board 110 to fix the first connecting plate 221 to the circuit board 110. The opening 222 is disposed so that the connection between the first connecting plate 221 and the circuit board 110 is simpler and more convenient.

[0068] In one embodiment, the shape of the opening 222 may be a round hole (shown in FIG. 4), an oval hole (shown in FIG. 6), a square hole (shown in FIG. 7), a U-shaped notch (shown in FIGS. 8 and 9), or any other suitable shape. In one embodiment, the fixing member 111 may be a screw, a snap fit, or the like.

[0069] Please refer to Fig. 11. In one embodiment, the shape of the opening 222 is a round hole, the fixing member 111 is a corresponding screw bolt 1111 and a screw nut 1112, and a hole 112 penetrating the circuit board 110 is disposed on the circuit board 110. The screw bolt 1111 passes through the opening 222, the hole 112, and the screw nut 1112 in order to fix the first connection plate 221 to the circuit board 110.

[0070] In a possible embodiment, the connection terminal 113 (shown in FIG. 10) is disposed on the circuit board 110, the first connection plate 221, the connection terminal 113, and the circuit board 110 are stacked in order, and the connection terminal 113 is connected to the first connection plate 221 and the circuit board 110. The first connection plate 221, the connection terminal 113, and the circuit board 110 are stacked in order in a first direction X, the first direction X is perpendicular to the circuit board 110, the connection terminal 113 is fixed to the circuit board 110 and electrically connected to the circuit board 110, the pore channel 1131 is disposed on the connection terminal 113, and the opening 222 is disposed on the first connection plate 221. The inverter 10 further includes a fixing member 111, which extends through the opening 222 and into the pore channel 1131 in the first direction X, and fixes the first connection plate 221 to the connection terminal 113. The connection terminals 113 are arranged so that the connection between the first connection plate 221 and the circuit board 110 is simpler and more convenient. In one embodiment, a screw thread is arranged in the slot channel 1131, and the fixing member 111 is a screw, and the screw and the screw thread cooperate with each other to more securely fix the first connection plate 221 to the connection terminals 113.

[0071] In one embodiment, the socket 114 (shown in FIG. 12) is disposed on the circuit board 110, the socket 114 is electrically connected to the circuit board 110, the first connecting plate 221 is inserted into the socket 114 and electrically connected to the socket 114, and the first connecting plate 221 is further electrically connected to the circuit board 110. The internal structure of the socket 114 is not limited to the structure shown in FIG. 12, and as long as the first connecting plate 221 is inserted into the socket 114, the first connecting plate 221 is fixed to the socket 114 and electrically connected to the socket 114.

[0072] Please refer to FIG. 4 for further details. In a possible embodiment, the first conductive core 220 includes a first conductive core body 223 and a first connection plate 221, the first conductive core body 223 passes through the outside and inside of the housing 100, the first connection plate 221 is located at the end of the first conductive core body 223, and the extension direction of the first connection plate 221 is the same as the extension direction of the first conductive core body 223. The extension direction of the first conductive core body 223 is a second direction Y, and the second direction Y intersects with the first direction X. In this embodiment, the second direction Y intersects with the first direction X perpendicularly. The first conductive core 220 is linear and easy to process.

[0073] Please refer to FIG. 13 for further details. In a possible embodiment, the first conductive core 220 includes a first conductive core body 223 and a first connecting plate 221, the first conductive core body 223 passes through the outside and inside of the housing 100, the first connecting plate 221 is located at the end of the first conductive core body 223, and the extension direction of the first connecting plate 221 intersects with the extension direction of the first conductive core body 223. In one embodiment, the first connecting plate 221 is straight, and the included angle between the first connecting plate 221 and the first conductive core body 223 is greater than 0° and less than 180°, so that the first connector 200 can adapt to different installation environments. In one embodiment, the first connecting plate 221 is arc-shaped.

[0074] Please refer to Figures 14 and 15. In a possible embodiment, the first conductive core 220 further includes a first connection section 224, which is located between the first conductive core body 223 and the first connection plate 221, and the extension direction of the first connection section 224 intersects with both the extension direction of the first conductive core body 223 and the extension direction of the first connection plate 221. The included angle between the first connection section 224 and the first conductive core body 223 is greater than 0° and less than 180°, and the included angle between the first connection section 224 and the first connection plate 221 is greater than 0° and less than 180°. The first conductive core 220 is "Z" shaped, which allows the first connector 200 to adapt to different installation environments.

[0075] In one embodiment, the first conductive core 220(a) is “Z” shaped (as shown in FIG. 16 ) and the first conductive core 220(b) is straight, and the first conductive core 220(a) and the first conductive core 220(b) are staggered, thereby conserving space in the inverter 10.

[0076] See Fig. 14. In a possible embodiment, the first connector 200 further includes an insulating portion 230, which covers the outer surface of the first connection section 224. Although the first connection section 224 can improve the installation flexibility of the first conductive core 220, the first connection section 224 also increases the length of the first conductive core 220, and in some cases, a short circuit may occur when the conductive portion falls on the first connection section 224. Since the first connection section 224 is insulated and isolated from the external environment by the insulating portion 230, the risk of a short circuit occurring in the first connection section 224 is reduced, and the safety of the first connector 200 is improved.

[0077] In a possible embodiment, the first conductive core body 223 and the first connecting plate 221 are of a one-piece structure. The one-piece structure is strong, which increases the connection strength between the first conductive core body 223 and the first connecting plate 221 and extends the service life of the first connector 200.

[0078] In a possible embodiment, the inverter 10 further includes a temperature sensor 300 (shown in FIG. 10 ), which is located on the circuit board 110 and is located on the peripheral side of the first connection plate 221. The temperature sensor may be a thermistor, a thermocouple, etc., and is configured to monitor the temperature of the first connection plate 221 to prevent the inverter 10 from overheating or even catching fire due to poor contact caused by improper installation. In one embodiment, the temperature sensor 300 is located on the peripheral side of the location where the first connection plate 221 is connected to the connection terminal 113.

[0079] Please refer to Fig. 2 and Fig. 17. Fig. 17 is a schematic diagram of a structure in which the second connector 400 is installed in the housing 100. In a possible embodiment, the inverter 10 further includes the second connector 400. The second connector 400 includes a second housing 410 and a second conductive core 420, the second housing 410 is fixed to the outside of the housing 100, the second conductive core 420 is located in the second housing 410 and extends to the inside of the housing 100, the second conductive core 420 includes a second connection plate 421 located inside the housing 100, the second connection plate 421 is a flat structure, the second connection plate 421 is fixed to the circuit board 110 and is electrically connected to the negative terminal of the inverter circuit, at least a part of the orthogonal projection of the second connection plate 421 on the circuit board 110 is located on the circuit board 110, and the first connection plate 221 is electrically connected to the positive terminal of the inverter circuit.

[0080] 1, the negative terminal of the inverter circuit is the end of the inverter circuit connected to the negative terminal of the photovoltaic power generation module 20, and the positive terminal of the inverter circuit is the end of the inverter circuit connected to the positive terminal of the photovoltaic power generation module 20, and the inverter circuit and the photovoltaic power generation module 20 form a loop. A current flows from the positive terminal of the photovoltaic power generation module 20 to the positive terminal of the inverter circuit, the first connector 200 is located between the positive terminal of the photovoltaic power generation module 20 and the positive terminal of the inverter circuit of the circuit board 110, and the second connector 400 is located between the negative terminal of the photovoltaic power generation module 20 and the negative terminal of the inverter circuit of the circuit board 110. In one embodiment, the end of the conductive core of an existing male connection part on the market is processed, such as by punching and rolling, so that the end of the conductive core has a flat structure, to manufacture the first connector 200. The end of the conductive core of the existing female connection part on the market is processed by punching, rolling, etc., so that the end of the conductive core has a flat structure, and the second connector 400 is manufactured. In one embodiment, the end of the conductive core of the existing female connection part on the market is processed by punching, rolling, etc., so that the end of the conductive core has a flat structure, and the first connector 200 is manufactured. The end of the conductive core of the existing female connection part on the market is processed by punching, rolling, etc., so that the end of the conductive core has a flat structure, and the second connector 400 is manufactured. Since the first connector 200 and the second connector 400 are obtained by directly and simply processing based on the existing male connection part and female connection part on the market, the manufacturing process of the first connector 200 and the second connector 400 is simpler and the manufacturing cost is saved.

[0081] In one embodiment, the opening 422 is disposed in the second connecting plate 421, and the inverter 10 further includes a fixing member 111 (shown in FIG. 18 ), which passes through the opening 422 and is fixed to the circuit board 110 to fix the second connecting plate 421 to the circuit board 110. The opening 422 is disposed such that the connection between the second connecting plate 421 and the circuit board 110 is simpler and more convenient.

[0082] In one embodiment, the orthogonal projection of the first connecting plate 221 on the circuit board 110 does not overlap with the orthogonal projection (shown in FIG. 2) of the second connecting plate 421 on the circuit board 110. The first connecting plate 221 and the second connecting plate 421 are arranged alternately, which makes it easier to install the first connector and the second connector on the circuit board 110, saves installation space on the circuit board 110, and allows multiple connectors to be arranged as closely together as possible.

[0083] In one embodiment, the first connecting plate 221 and the second connecting plate 421 are located on the same side of the circuit board 110 in the first direction X (shown in FIG. 2).

[0084] In one embodiment, the first connecting plate 221 and the second connecting plate 421 are respectively arranged on either side of the circuit board 110 in the first direction X (shown in FIG. 19 ). In one embodiment, the first connecting plate 221 and the second connecting plate 421 are located on either side of the circuit board 110 in the first direction X, and an orthogonal projection of the first connecting plate 221 on the circuit board 110 at least partially overlaps with an orthogonal projection of the second connecting plate 421 on the circuit board 110.

[0085] Please refer to Figures 20 and 21. Figure 20 is a schematic diagram of an inverter according to another embodiment of the present application. Figure 21 is an exploded view of the inverter of Figure 20. In a possible embodiment, the inverter 10 further includes a fixed base 500 (shown in Figure 21). The fixed base 500 is located on the circuit board 110, the fixed groove 510 is disposed in the fixed base 500, the connection piece 511 is disposed in the fixed groove 510, one end of the connection piece 511 is connected to the circuit board 110, and the other end of the connection piece 511 is fixed and electrically connected to the second connection plate 421. The fixed base 500 is located inside the housing 100, and the fixed base 500 is located on the side of the circuit board 110 and close to the first connector 200. In this embodiment, the first connector 200 is directly electrically connected to the fixed base 500, and the second connector 400 is electrically connected to the fixed base 500 using the connection piece 511. In one aspect, the fixed base 500 is arranged so that the plurality of first connectors 200 and the plurality of second connectors 400 are fixed to each other, thereby improving the connection stability between the plurality of first connectors 200 and the circuit board 110 and between the plurality of second connectors 400 and the circuit board 110, and in another aspect, the wiring is rationally planned and arranged using the fixed base 500, which makes the installation and wiring connection of the inverter 10 easier. The connection piece 511 is arranged so that the second connector 400 is arranged in a direction away from the circuit board 110 in the first direction X compared to the first connector 200, and the second connector 400 and the first connector 200 are in staggered positions. This helps to save the installation space on the circuit board 110 and arrange the plurality of second connectors 400 and the first connector 200 as densely as possible.

[0086] In one embodiment, the height of the fixed base 500 in the first direction X is greater than the height of the connection terminal 113 in the first direction X. In one embodiment, the second connector 400 is directly electrically connected to the fixed base 500, and the first connector 200 is electrically connected to the fixed base 500 using a connection piece 511. Since the height of the fixed base 500 in the first direction X is greater than the height of the connection terminal 113 in the first direction X, the first connector 200 and the second connector 400 are staggered in the first direction X. This helps to save installation space on the circuit board 110.

[0087] In one embodiment, a portion of the first connector 200 is electrically connected directly to the fixed base 500, and another portion of the first connector 200 is electrically connected to the fixed base 500 using a connecting piece 511. A portion of the second connector 400 is electrically connected directly to the fixed base 500, and another portion of the second connector 400 is electrically connected to the fixed base 500 using a connecting piece 511.

[0088] In a possible embodiment, the inverter 10 further includes a third connector 600 (shown in FIG. 22). The third connector 600 is located at an end of the first connector 200 that is away from the inverter 10, and includes a third housing 610 and a third conductive core 620, the third housing 610 is fixed to the first housing 210, and the third conductive core 620 is electrically connected to the first conductive core 220. The third conductive core 620 is located within the third housing 610 and extends outside the third housing 610 in a direction away from the first connector 200, the third conductive core 620 and the first conductive core 220 are electrically connected to the third housing 610 or electrically connected inside the first housing 210, and a portion of the third conductive core 620 that is located outside the third housing 610 is connected to the photovoltaic module 20 via a cable. The design of the third connector 600 and the first connector 200 being detachably connected facilitates assembly and disassembly between the photovoltaic power generation module 20 and the inverter 10.

[0089] In a possible embodiment, the inverter 10 further includes a fourth connector 700 (shown in FIG. 23). The fourth connector 700 is located at an end of the second connector 400 that is away from the inverter 10, and the fourth connector 700 includes a fourth housing 710 and a fourth conductive core 720, the fourth housing 710 is fixed to the second housing 410, and the fourth conductive core 720 is electrically connected to the second conductive core 420. The fourth conductive core 720 is located within the fourth housing 710 and extends outside the fourth housing 710 in a direction away from the second connector 400, the fourth conductive core 720 and the second conductive core 420 are electrically connected to the fourth housing 710 or electrically connected inside the second housing 410, and a portion of the fourth conductive core 720 that is located outside the fourth housing 710 is connected to the photovoltaic module 20 via a cable. The design in which the fourth connector 700 and the second connector 400 are detachably connected makes it easy to assemble and disassemble the photovoltaic power generation system 1.

[0090] Please refer to Fig. 12 further. The present application further provides an inverter 10. The inverter 10 includes a housing 100, a first connector 200, and a socket 114, the circuit board 110 is disposed inside the housing 100, and the inverter circuit is disposed in the circuit board 110. The first connector 200 includes a first housing 210 and a first conductive core 220, the first housing 210 is fixed to the housing 100, the first conductive core 220 is located in the first housing 210 and extends inside the housing 100, the socket 114 is located on the circuit board 110 and is electrically connected to the circuit board 110, and an end of the first conductive core 220, which is located inside the housing 100, is inserted into the socket 114 and fixed to the socket 114, shortening the distance between the first conductive core 220 and the circuit board 110. The end of the first conductive core 220 away from the first connecting plate 221 is configured to be connected to the photovoltaic power generation module 20, and the first conductive core 220 is configured to transmit a direct current generated by the photovoltaic power generation module 20 to an inverter circuit using the first connecting plate 221, and the inverter circuit converts the direct current into an alternating current.

[0091] In one embodiment, the shape of the end of the first conductive core 220 that is connected to the socket 114 matches the shape of the socket 114. In FIG. 12, the end of the first conductive core 220 that is connected to the socket 114 is a flat structure. In another embodiment, the end of the first conductive core 220 that is connected to the socket 114 is a cylinder, a circle, a three-dimensional column, etc., and the internal structure of the socket 114 matches the shape of the first conductive core 220, thereby electrically connecting the first conductive core 220 to the socket 114.

[0092] The inverter and photovoltaic power generation system provided in the embodiments of the present application have been described in detail above. The principles and embodiments of the present application have been described herein through specific examples. The description of the embodiments is provided only to help understand the method and core idea of ​​the present application. Furthermore, those skilled in the art can make modifications and modifications to the present application in terms of specific embodiments and application scope based on the ideas of the present application. Therefore, the contents of this specification should not be interpreted as limitations on the present application.

Claims

1. An inverter, the inverter comprising: a housing, a circuit board disposed inside the housing, and an inverter circuit disposed within the circuit board; a first connector including a first housing and a first conductive core; the first housing is fixed to the housing, the first conductive core is located within the first housing and extends to the inside of the housing, the first conductive core includes a first connection plate located on the inside of the housing, the first connection plate has a flat structure, the first connection plate is fixed to the circuit board and electrically connected to the inverter circuit, an end of the first conductive core away from the first connection plate is configured to connect to a photovoltaic module, the first conductive core is configured to transmit a direct current generated by the photovoltaic module to the inverter circuit using the first connection plate, the inverter circuit converts the direct current to an alternating current, and the flat structure is configured to improve connection stability and current transmission stability when the first connection plate is fixed to a circuit board. Inverter.

2. 2. The inverter of claim 1, wherein the first connection plate and the circuit board are stacked in a first direction, at least a portion of a projection of the first connection plate on the circuit board in the first direction is located on the circuit board, and the first connection plate and the circuit board have a partial intersection in a second direction, shortening a distance between the first connection plate and the circuit board in the second direction, and the first direction is perpendicular to the second direction.

3. 2. The inverter of claim 1, wherein an opening is disposed in the first connecting plate, the inverter further including a fastening member that passes through the opening and is fastened to the circuit board to secure the first connecting plate to the circuit board.

4. 2. The inverter of claim 1, wherein a connection terminal is disposed on the circuit board, the first connection plate, the connection terminal, and the circuit board are stacked in order in a first direction, the first direction being perpendicular to the circuit board, the connection terminal is fixed to the circuit board and electrically connected to the circuit board, a micropore channel is disposed on the connection terminal, and an opening is disposed on the first connection plate, the inverter further including a fixing member, the fixing member extending through the opening in the first direction and into the micropore channel, and fixing the first connection plate to the connection terminal.

5. 2. The inverter of claim 1, wherein the first conductive core includes a first conductive core body and the first connecting plate, the first conductive core body passes through the outside and the inside of the housing, the first connecting plate is located at an end of the first conductive core body, and the extension direction of the first connecting plate is the same as the extension direction of the first conductive core body, facilitating processing of the first conductive core.

6. 2. The inverter of claim 1, wherein the first conductive core includes a first conductive core body and the first connecting plate, the first conductive core body passes through the outside and the inside of a housing, the first connecting plate is located at an end of the first conductive core body, and an extension direction of the first connecting plate intersects with an extension direction of the first conductive core body, thereby making the first conductive core adaptable to a plurality of installation environments.

7. 7. The inverter of claim 5 or 6, wherein the first conductive core further includes a first connection section, the first connection section being located between the first conductive core body and the first connection plate, and the extension direction of the first connection section intersects both the extension direction of the first conductive core body and the extension direction of the first connection plate, thereby making the first conductive core adaptable to a plurality of installation environments.

8. 8. The inverter of claim 7, wherein the first connector further includes an insulating portion that covers an outer surface of the first connection section to insulate the first connection section from an external environment and reduce a risk of a short circuit occurring in the first connection section.

9. 7. The inverter according to claim 5 or 6, wherein the first conductive core body and the first connecting plate are of an integral structure, thereby improving the connection strength between the first conductive core body and the first connecting plate and extending the service life of the first connector.

10. 2. The inverter of claim 1, further comprising a temperature sensor located on the circuit board and positioned on a peripheral side of the first connecting plate, the temperature sensor configured to monitor a temperature of the first connecting plate.

11. 2. The inverter of claim 1, wherein the inverter further includes a second connector, the second connector including a second housing and a second conductive core, the second housing fixed to the outside of the housing, the second conductive core located within the second housing and extending into the inside of the housing, the second conductive core including a second connection plate located on the inside of the housing, the second connection plate having a flat structure, the second connection plate fixed to the circuit board and electrically connected to a negative terminal of the inverter circuit, at least a portion of an orthogonal projection of the second connection plate on the circuit board being located on the circuit board, and the first connection plate being electrically connected to a positive terminal of the inverter circuit.

12. 12. The inverter of claim 11, wherein an orthogonal projection of the first connecting plate on the circuit board does not overlap with an orthogonal projection of the second connecting plate on the circuit board, and the first connecting plate and the second connecting plate are staggered.

13. 12. The inverter according to claim 11, wherein the inverter further includes a fixed base, the fixed base is located on the circuit board, a fixed groove is disposed on the fixed base, a connection piece is disposed on the fixed groove, one end of the connection piece is connected to the circuit board, and the other end of the connection piece is fixed to and electrically connected to the second connection plate, and the fixed base is configured to improve the stability of the connection between the multiple first connectors and the multiple second connectors and the circuit board, and to facilitate installation and wiring connection of the inverter.

14. 2. The inverter of claim 1, wherein the inverter further includes a third connector, the third connector being located at an end of the first connector remote from the inverter, the third connector including a third housing and a third conductive core, the third housing fixed to the first housing, the third conductive core electrically connected to the first conductive core, and the third connector removably connected to the first connector, facilitating assembly and disassembly of the inverter.

15. An inverter, the inverter comprising: a housing, a circuit board disposed inside the housing, and an inverter circuit disposed within the circuit board; a first connector including a first housing and a first conductive core, the first housing being secured to the housing, the first conductive core being located within the first housing and extending inwardly of the housing; a socket located on the circuit board and electrically connected to the circuit board, an end of the first conductive core located on the inside of the housing is inserted into the socket and fixed to the socket, the socket connecting the first conductive core to the circuit board and shortening the distance between the first conductive core and the circuit board; an end of the first conductive core away from a first connection plate, the end configured to connect to a photovoltaic module, the first conductive core configured to transmit direct current generated by the photovoltaic module using the first connection plate to the inverter circuit, the inverter circuit converting the direct current to alternating current. Inverter.

16. 16. A photovoltaic power generation system including a photovoltaic power generation module and an inverter according to any one of claims 1 to 15, wherein the photovoltaic power generation module is electrically connected to an end of the first connector that is away from the circuit board, and a direct current generated by the photovoltaic power generation module is transmitted to the inverter circuit using the first connection plate.

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