Inverter assembly and photovoltaic power generation system with same

Abstract

The utility model discloses an inverter assembly and a photovoltaic power generation system, and the inverter assembly comprises an inverter circuit board which is provided with an inverter circuit and a temperature detection circuit; the terminal assembly is connected to the surface of one side of the inverter circuit board, and the terminal assembly is electrically connected with the inverter circuit and is suitable for being electrically connected with a photovoltaic group string; the temperature acquisition module is connected to the temperature detection circuit of the inverter circuit; wherein the terminal assembly comprises a plurality of groups of connecting terminals, the temperature acquisition module comprises a plurality of temperature sub-acquisition modules, each temperature sub-acquisition module is connected to the temperature detection circuit, and each group of terminal assembly at least corresponds to the position of one temperature sub-acquisition module. The inverter assembly provided by the embodiment of the utility model has the advantages of accurate temperature acquisition, high safety and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic technology field especially is involved in a kind of inverter assembly and photovoltaic power generation system with it. BACKGROUND

[0002] In new energy industry chain, solar energy is very important, solar power generation is the power generation mode that the light energy generated by sun is converted into electric energy by photovoltaic assembly.It needs inverter assembly to realize energy conversion.The direct current side input required by each inverter assembly is composed of a plurality of photovoltaic assemblies in series and parallel connection, and the photovoltaic assembly is connected to the inverter assembly through the connecting terminal, and the connecting terminal transmits the direct current and voltage output by the photovoltaic assembly to the inverter assembly.

[0003] In the related art, the inverter assembly has a plurality of terminal assemblies, one end of each terminal assembly is connected with the wire end side connecting terminal of the corresponding photovoltaic assembly, and the other end is welded on the inverter circuit board. The connecting terminal transmits heat energy to the inverter circuit board through the internal copper strip and the solder pad. Only one temperature acquisition module is provided, which is easily affected by the external environment temperature, resulting in a large error between the temperature detection result and the actual value. SUMMARY

[0004] The utility model aims at at least solving one of the technical problems existing in the prior art. To this end, one object of the utility model is to provide an inverter assembly, which has the advantages of accurate temperature acquisition, high safety, etc.

[0005] The utility model further provides a photovoltaic power generation system with the inverter assembly.

[0006] To achieve the above object, according to the embodiments of the utility model, an inverter assembly is provided, which comprises: an inverter circuit board having an inverter circuit and a temperature detection circuit; a terminal assembly connected to one side surface of the inverter circuit board, the terminal assembly being electrically connected with the inverter circuit and adapted to be electrically connected with a photovoltaic module string; and a temperature acquisition module connected to the temperature detection circuit of the inverter circuit; wherein the terminal assembly comprises a plurality of connecting terminals, the temperature acquisition module comprises a plurality of temperature sub-acquisition modules, each temperature sub-acquisition module is connected to the temperature detection circuit, and each terminal assembly is at least corresponding to the position of one temperature sub-acquisition module.

[0007] According to the inverter assembly of the embodiment of the utility model, the temperature acquisition module comprises multiple temperature sub-acquisition modules, and each temperature sub-acquisition module is connected to the temperature detection circuit. This distributed temperature acquisition mode can more accurately detect the temperature distribution of the terminal assembly, avoiding errors that may be caused by single-point temperature detection. The positions of the multiple temperature sub-acquisition modules correspond to each group of terminal assemblies, ensuring real-time monitoring of the temperature of each connection terminal, so that overheating problems can be discovered and handled in time. By setting an upper limit value of temperature, protective measures can be taken quickly when the temperature exceeds a dangerous value. This protection mechanism can avoid safety accidents such as fire caused by excessively high temperature, improving the safety of the system.

[0008] In addition, the use of the distributed temperature acquisition module and the multiple temperature sub-acquisition modules improves the accuracy and reliability of data. The measurement results of the multiple temperature sensors can be verified and compared with each other, reducing the influence of a single sensor failure on the system. At the same time, the real-time monitoring and fast response mechanism also ensures the timeliness and effectiveness of data.

[0009] Therefore, the inverter assembly according to the embodiment of the utility model has the advantages of accurate temperature acquisition, high safety, and the like.

[0010] According to some specific embodiments of the utility model, each group of the connection terminals comprises: a positive terminal and a negative terminal, and the positive terminal and the negative terminal are arranged along a first direction of the inverter circuit board.

[0011] According to some specific embodiments of the utility model, multiple groups of the connection terminals are arranged into a terminal unit along a second direction of the inverter circuit board, wherein the second direction is perpendicular to the first direction.

[0012] According to some specific embodiments of the utility model, the terminal unit is multiple, and multiple terminal units are arranged along the first direction of the inverter circuit board.

[0013] According to some specific embodiments of the utility model, the inverter assembly further comprises: an arc drawing detection module, and the arc drawing detection module is located between the positive terminal and the negative terminal along a second direction of the inverter circuit board.

[0014] According to some specific embodiments of the utility model, the multiple connection terminals are located on the same side surface of the inverter circuit board.

[0015] According to some specific embodiments of the utility model, the inverter circuit board is configured with a jack, the connection terminal is configured with a plug post, and the plug post is plugged into the jack to enable the terminal assembly to be installed on the inverter circuit board.

[0016] According to some specific embodiments of the present application, the inverter assembly further comprises: a controller, the controller is electrically connected with the temperature detection circuit and the inverter circuit; a circuit breaker protection device, the circuit breaker protection is communicated with the controller to control the inverter circuit to break the circuit.

[0017] According to some specific embodiments of the present application, the temperature acquisition module is a thermistor.

[0018] According to the embodiments of the second aspect of the present application, a photovoltaic power generation system is provided, comprising the inverter assembly according to the above embodiments of the present application.

[0019] According to the photovoltaic power generation system of the present application, by using the inverter assembly according to the embodiments of the present application, the temperature acquisition is accurate, safe and the like.

[0020] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0022] Figure 1 is a structural block diagram of the inverter assembly according to the embodiments of the present application.

[0023] Figure 2 is a structural schematic diagram of the inverter assembly according to the embodiments of the present application;

[0024] Figure 3 is Figure 2 a partial enlarged view of

[0025] Figure 4 is a front view of the photovoltaic inverter according to the embodiments of the present application;

[0026] Figure 5 is a top view of the photovoltaic inverter according to the embodiments of the present application;

[0027] Figure 6 is a structural schematic diagram of the temperature acquisition module of the photovoltaic inverter according to the embodiments of the present application.

[0028] LIST OF REFERENCE NUMERALS:

[0029] inverter assembly 1, inverter circuit board 100, terminal assembly 200, arc detection module 300,

[0030] The temperature acquisition module 400, the temperature sub-acquisition module 410, the controller 500, the circuit protection device 600,

[0031] The filter capacitor 700, the DC lightning protection 800, the signal connector 900,

[0032] The jack 101, the set of connection terminals 210, the positive terminal 211, the negative terminal 212, the plug post 201. DETAILED DESCRIPTION

[0033] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only to explain the present application, and cannot be understood as a limitation of the present application.

[0034] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0035] In the description of the present application, "first feature" and "second feature" can include one or more of the features.

[0036] In the description of the present application, "a plurality of" means two or more, and "several" means one or more.

[0037] The inverter assembly 1 according to an embodiment of the present application is described below with reference to the drawings.

[0038] As shown in Figures 1-6 The inverter assembly 1 according to an embodiment of the present application includes an inverter circuit board 100, a terminal assembly 200, and a temperature acquisition module 400.

[0039] The inverter circuit board 100 has an inverter circuit and a temperature detection circuit. The terminal assembly 200 is connected to one side surface of the inverter circuit board 100, and is electrically connected to the inverter circuit and adapted to be electrically connected to a photovoltaic module string. The temperature acquisition module 400 is connected to the temperature detection circuit of the inverter circuit board 100. The terminal assembly 200 includes a plurality of groups of connection terminals 210, and the temperature acquisition module 400 includes a plurality of temperature sub-acquisition modules 410, each of which is connected to the temperature detection circuit, and each group of terminal assemblies 200 corresponds to the position of at least one temperature sub-acquisition module 410.

[0040] For example, the inverter assembly 1 of the utility model is based on a 150kw inverter assembly. One end of the terminal assembly 200 is electrically connected to the connection terminal of the photovoltaic module string, and the other end is welded on the inverter circuit board 100. The terminal assembly 200 can transmit heat energy to the inverter circuit board 100 through the internal copper strip and the solder pad.

[0041] According to the inverter assembly 1 of the utility model embodiment, the temperature acquisition module 400 includes a plurality of temperature sub-acquisition modules 410, each of which is connected to the temperature detection circuit. This distributed temperature acquisition method can more accurately detect the temperature distribution of the terminal assembly 200, avoiding the errors that may be caused by single-point temperature detection. The positions of the plurality of temperature sub-acquisition modules 400 correspond to each group of terminal assemblies 200, ensuring real-time monitoring of the temperature of each terminal assembly 200, so that overheating problems can be discovered and handled in time. By setting the upper limit of the temperature, protective measures can be taken quickly when the temperature exceeds the dangerous value. This protection mechanism can avoid safety accidents such as fire caused by high temperature, and improve the safety of the system.

[0042] In addition, the use of distributed temperature acquisition module 400 and a plurality of temperature sub-acquisition modules 410 improves the accuracy and reliability of the data. The measurement results of the plurality of temperature sensors can be verified and compared with each other, reducing the influence of a single sensor failure on the system. At the same time, the real-time monitoring and fast response mechanism also ensures the timeliness and effectiveness of the data.

[0043] Therefore, according to the inverter assembly 1 of the utility model embodiment, the temperature acquisition is accurate, and the safety is high.

[0044] In some specific embodiments of the utility model, as shown in Figure 2 and Figure 3 Each group of connection terminals 210 includes a positive terminal 211 and a negative terminal 212. The positive terminal 211 and the negative terminal 212 are arranged along the first direction of the inverter circuit board 100. The first direction can be the width direction of the circuit board 100.

[0045] For example, the positive terminal 211 and the negative terminal 212 are symmetrically arranged on both sides of the inverter circuit board 100, which occupies a larger space on one side of the inverter circuit board 100, and the circuit arrangement position is more reasonable. Moreover, the connecting terminal 210 can be a detachable structure, and the assembly and disassembly are more convenient. The arrangement of the inverter circuit board 100 electric connection line is more dispersed.

[0046] The positive terminal 211 and the negative terminal 212 are electrical connection points between the solar panel and the inverter assembly 1. They are respectively used for connecting the positive and negative poles of the solar panel, and ensure that the current of the photovoltaic system can flow smoothly into the inverter assembly.

[0047] In some specific embodiments of the present application, as shown in Figure 5 A plurality of connecting terminals 210 are arranged into a terminal unit along the second direction of the inverter circuit board 100, wherein the second direction is perpendicular to the first direction, and the second direction can be the length direction of the circuit board 100.

[0048] Further, the terminal unit is a plurality of terminal units arranged along the first direction of the inverter circuit board 100. By reasonably arranging in the length direction and the width direction of the inverter circuit board 100, the space resources of the inverter circuit board 100 can be maximally utilized, and such a structure ensures that more terminal assemblies 200 can be accommodated in the inverter circuit board 100. At the same time, the design of the plurality of terminal units allows more photovoltaic assemblies to be connected at the same time, improving the working efficiency of the photovoltaic system.

[0049] In some specific embodiments of the present application, as shown in Figure 2 and Figure 4 The inverter assembly 1 further comprises an arc detection module 300. The arc detection module 300 is located between the positive terminal 211 and the negative terminal 212 in the second direction of the inverter circuit board 100.

[0050] The arc detection module 300 can monitor the arc condition between the positive terminal 211 and the negative terminal 212 in real time. The formation of arc is often accompanied by high temperature and the generation of harmful gas, and timely detection of arc can help to implement rapid response and ensure the safety of the inverter assembly system.

[0051] Through timely detection and response to the arc, the arc detection module 300 can help the inverter assembly 1 to quickly cut off the power supply, thereby effectively reducing the risk of fire and protecting the safety of the equipment and the surrounding environment. At the same time, by accurately monitoring the arc condition, the arc detection module 300 can improve the overall reliability of the inverter assembly 1, ensure automatic power-off in an unsafe state, and thus protect the long-term stable operation of the inverter assembly 1 system.

[0052] In some specific embodiments of the present application, as shown inFigure 2 As shown, the plurality of connection terminals 210 are all located on the same side surface of the inverter circuit board 100.

[0053] When all connection terminals 210 are located on the same side of the inverter circuit board 100, the installation and wiring process is more convenient and intuitive. Users and installers can make all connections in one direction, reducing operational complexity. At the same time, the connection terminals 210 concentrated on the same side can effectively reduce the crossing and confusion of wiring, helping to keep the internal wiring neat and improve the manageability of the photovoltaic system.

[0054] In some embodiments of the present application, as shown in Figure 2 and Figure 3 The inverter circuit board 100 is configured with a socket 101, and the connection terminal 210 is configured with a plug 201, which is plugged into the socket 101 to allow the terminal assembly 210 to be installed on the inverter circuit board 100.

[0055] The combination of the socket 101 and the plug 201 allows the terminal assembly 210 to be easily plugged into the inverter circuit board 100, simplifying the installation process between components, which usually does not require complex tools or additional fixing devices, reducing the difficulty and time of installation, and improving work efficiency. In addition, the plug-in structure can provide a stable connection to ensure good electrical contact, thereby reducing current loss or failure caused by poor contact and improving the safety and reliability of the inverter assembly 1.

[0056] In some embodiments of the present application, as shown in Figure 1 and Figure 2 The inverter assembly 1 further comprises a controller 500 and a circuit breaker 600. The controller 500 is electrically connected to the temperature detection circuit and the inverter circuit. The circuit breaker communicates with the controller to control the inverter circuit to break.

[0057] The temperature detection circuit monitors the operating temperature of the inverter assembly 1 in real time. If the temperature is too high, the controller 500 can quickly send a trip signal to operate the circuit breaker 600, thereby effectively cutting off the input source of the inverter assembly 1. This preventive measure can effectively avoid safety hazards such as fire caused by overheating, improving the safety of the overall structure.

[0058] This structure can not only monitor the working state, but also take timely measures when a fault occurs to prevent equipment damage. The controller 500's response mechanism can protect the inverter assembly 1 and its downstream equipment from damage, thereby maintaining the reliability of the entire photovoltaic system and allowing the inverter assembly 1 to remain stable during long-term operation, reducing the failure rate.

[0059] In addition, the photovoltaic inverter 1 also includes a filter capacitor 700, a DC lightning protection 800, and a signal connector 900, etc. The photovoltaic inverter 1 converts the direct current generated by the photovoltaic module into alternating current. In this process, the direct current voltage may fluctuate, and the filter capacitor 700 can smooth these fluctuations to provide a stable direct current voltage, ensuring the normal operation of the photovoltaic inverter 1.

[0060] The DC lightning protection 800 can prevent overvoltage damage to the photovoltaic module and the photovoltaic inverter 1, ensuring the safety and stability of the overall structure. Under high pressure, equipment damage caused by voltage rise can be avoided. The signal connector 900 is used to transmit important data in the system, including the output voltage, current, temperature information, etc. of the photovoltaic module. These data are crucial for the control and optimization of the operation of the photovoltaic inverter 1.

[0061] In some specific embodiments of the present application, the temperature acquisition module 400 is a thermistor. The thermistor is very sensitive to temperature changes and can accurately capture small changes in temperature, which is very important for the temperature acquisition module to monitor the inverter assembly 1, and can timely feedback the working state and environmental temperature of the inverter assembly 1, ensuring the performance adjustment of the inverter assembly 1 under different temperature conditions, and avoiding safety hazards caused by temperature changes.

[0062] The photovoltaic power generation system according to the embodiments of the present application is described below.

[0063] The photovoltaic power generation system according to the embodiments of the present application includes the inverter assembly 1 according to the above embodiments of the present application, and has the advantages of accurate temperature acquisition, high safety, etc.

[0064] Other configurations and operations according to the embodiments of the present application are known to those skilled in the art and will not be described in detail here.

[0065] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example.

[0066] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An inverter assembly, characterized in that, include: An inverter circuit board, the inverter circuit board having an inverter circuit and a temperature detection circuit; A terminal assembly is connected to one side surface of the inverter circuit board, the terminal assembly is electrically connected to the inverter circuit and is adapted to be electrically connected to a photovoltaic string; A temperature acquisition module, wherein the temperature acquisition module is connected to the temperature detection circuit on the inverter circuit board; The terminal assembly includes multiple sets of connection terminals, and the temperature acquisition module includes multiple temperature sub-acquisition modules. Each temperature sub-acquisition module is connected to the temperature detection circuit, and each set of connection terminals corresponds to the position of at least one temperature sub-acquisition module.

2. The inverter assembly according to claim 1, characterized in that, Each set of connection terminals includes: Positive and negative terminals are arranged along a first direction of the inverter circuit board.

3. The inverter assembly according to claim 2, characterized in that, Multiple sets of the connection terminals are arranged into a terminal unit along a second direction of the inverter circuit board, wherein the second direction is perpendicular to the first direction.

4. The inverter assembly according to claim 3, characterized in that, The terminal units are multiple, and the multiple terminal units are arranged along the first direction.

5. The inverter assembly according to claim 2, characterized in that, Also includes: An arc detection module is located between the positive terminal and the negative terminal in a second direction on the inverter circuit board.

6. The inverter assembly according to claim 1, characterized in that, All of the connection terminals are located on the same side surface of the inverter circuit board.

7. The inverter assembly according to claim 1, characterized in that, The inverter circuit board has a socket, and the connection terminal has a post. The post is inserted into the socket to mount the terminal assembly on the inverter circuit board.

8. The inverter assembly according to claim 1, characterized in that, Also includes: The controller is electrically connected to the temperature detection circuit and the inverter circuit; A circuit breaker protection device, which communicates with the controller to control the inverter circuit to disconnect.

9. The inverter assembly according to claim 1, characterized in that, The temperature acquisition module is a thermistor.

10. A photovoltaic power generation system, characterized in that, include: The inverter assembly according to any one of claims 1-9.

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