A connector, a micro-inverter with the connector, and a micro-inverter system

Abstract

The utility model discloses a connector, miniature inverter and miniature inverter system with connector, this connector is constituted by the male end subassembly and female end subassembly of inserting and connecting, female end subassembly includes female end rubber shell, and the inside of the open end of female end rubber shell is provided with accommodating cavity along the axial direction, and the accommodating cavity has female L line, female N line and two female 485 communication lines, male end subassembly includes male end rubber shell, and one end of male end rubber shell is the socket end, and the inside of socket end is provided with accommodation cavity along the axial direction, and male L line, male N line and two male 485 communication lines in accommodation cavity after inserting female L line, female N line and female 485 communication line constitute L line, N line and two 485 communication lines. Two 485 communication lines of the utility model adopt the differential signal transmission, have very strong inhibitory capacity to common mode interference, have very strong electromagnetic radiation interference capacity, and the stability and reliability of communication are good, convenient to install and use, and be suitable for large -scale popularization.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to a connector, a micro inverter with a connector, and a micro inverter system. Background Technology

[0002] In photovoltaic power generation systems, microinverters are a crucial component, and their communication performance directly impacts the monitoring and operational efficiency of the entire system. Currently, most microinverter systems in the industry use PLCs or wireless Wi-Fi for communication; however, in practical applications, these two methods have revealed numerous problems.

[0003] When using PLC communication, various harmonics, transient pulses and other interference signals in the power line can cause unstable PLC communication signal transmission, resulting in data loss, bit errors and other issues, which affect the system's accurate monitoring of the micro-inverter's operating status.

[0004] However, when using wireless Wi-Fi communication, interference from equipment such as power grid transformers can occur. This is because power grid transformers generate electromagnetic radiation during operation, which interferes with the transmission of wireless Wi-Fi signals, resulting in shortened communication distance, weakened signal strength, and even communication interruptions in some complex power grid environments, severely affecting the normal operation of the micro-inverter system. Utility Model Content

[0005] The purpose of this utility model is to provide a connector with strong anti-interference capability.

[0006] To achieve the above objectives, this utility model provides a connector, which consists of a male end assembly and a female end assembly that are inserted and connected together;

[0007] The female end assembly includes a female end housing, one end of which is an open end. An accommodating cavity is formed inside the open end along the axial direction. The accommodating cavity contains a female L-line, a female N-line, and two female 485 communication lines. The interface ends of the female L-line, female N-line, and female 485 communication lines point towards the male end assembly. The connection ends of the female L-line, female N-line, and female 485 communication lines extend out from the female end housing.

[0008] The male terminal assembly includes a male terminal housing, one end of which is a socket end for insertion into the open end. The socket end has an accommodating cavity along its axial direction, containing a male L-line, a male N-line, and two male 485 communication lines. The terminals of the male L-line, male N-line, and male 485 communication lines extend from the rear end of the male terminal housing. The insertion terminals of the male L-line, male N-line, and male 485 communication lines are respectively inserted into the interface terminals of the female L-line, female N-line, and female 485 communication lines, forming an L-line for providing a power supply line, an N-line for providing a power supply circuit, and two 485 communication lines for data transmission. The two 485 communication lines are used to carry electrical signals with the same voltage amplitude but opposite polarities.

[0009] Preferably, the receiving cavity has a first mounting base, a second mounting base, and a third mounting base; the first mounting base, the second mounting base, and the third mounting base have through holes for accommodating the male L-line, two male 485 communication lines, and the male N-line; the receiving cavity has a first connector, a second connector, and a third connector for insertion into the first mounting base, the second mounting base, and the third mounting base, respectively; the insertion ends of the male L-line, the male N-line, and the male 485 communication line extend from the first connector, the second connector, and the third connector, respectively, and point towards the female end assembly.

[0010] Preferably, the top two sides of the second mounting base have anti-foolproof bevels; the second insertion interface has an anti-foolproof groove adapted to the anti-foolproof bevels.

[0011] Preferably, the two female 485 communication lines and the two male 485 communication lines are also provided with a metal shielding layer.

[0012] Preferably, the terminals of the male L-line, male N-line, and male 485 communication line are protected by protective tubes after passing through the rear end of the male terminal housing.

[0013] Preferably, the terminals of the male L line, male N line and male 485 communication line extend outwards to form two first male L lines, two first male N lines and two male 485 communication lines respectively. Each first male L line, first male N line and male 485 communication line is used as a group to form a communication adapter component, which is then set on both sides. The two communication adapter components are protected by two protective sleeves respectively.

[0014] Preferably, the outer contour of the male end shell is stepped, and the male end shell is provided with an upper buckle block and a lower buckle block arranged vertically; the upper end of the female end shell has an upper buckle groove that is snapped into the upper buckle block, and the top of the receiving cavity has a lower buckle groove that is snapped into the lower buckle block.

[0015] Preferably, the two 485 communication lines are twisted together.

[0016] The purpose of this invention is to provide a miniature inverter with a connector, which has the characteristics of strong anti-interference ability, high stability and reliability.

[0017] To achieve the above objectives, this utility model provides a micro inverter with a connector, including a micro inverter and a connector; the micro inverter has a bayonet; the connector is disposed in the bayonet, and the connection ends of the female terminal component of the connector, namely the female L line, female N line and female 485 communication line, are connected to the corresponding communication interfaces on the micro inverter; a waterproof silicone pad is also provided between the female terminal component and the bayonet.

[0018] The purpose of this invention is to provide a micro inverter system with strong anti-interference ability, high stability and reliability.

[0019] To achieve the above objectives, this utility model provides a micro inverter system, comprising multiple micro inverters with connectors: a set of communication adapter components in one of the micro inverters with connectors is electrically connected to any set of communication adapter components in the preceding micro inverter with connectors, and another set of communication adapter components is electrically connected to any set of communication adapter components in the following micro inverter with connectors.

[0020] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0021] This invention relates to a connector, a micro-inverter with the connector, and a micro-inverter system. The connector incorporates two built-in 485 communication lines that use differential signal transmission, which have a strong ability to suppress common-mode interference, avoid the influence of interference signals in the power line on communication, and are not affected by electromagnetic radiation interference generated by the power grid transformer, thus ensuring the stability and reliability of communication. The overall structure is simple, requires no complex additional equipment, is easy to install and use, and is suitable for large-scale promotion and application. Attached Figure Description

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0023] Figure 1 This is a three-dimensional structural diagram of the connector in the first embodiment of the present invention;

[0024] Figure 2 for Figure 1 A schematic diagram of the separation structure when the female terminal component and the male terminal component are separated;

[0025] Figure 3 for Figure 1 A three-dimensional structural diagram of the Zhonggong terminal component;

[0026] Figure 4 for Figure 2 A three-dimensional structural diagram from another perspective;

[0027] Figure 5 for Figure 4 A magnified view of a portion of the image;

[0028] Figure 6 This is a three-dimensional structural diagram of the connector in the second embodiment of the present invention;

[0029] Figure 7 for Figure 6 A schematic diagram of the structure when two sets of communication adapter components are extended from the public L-line, public N-line, and public 485 communication line;

[0030] Figure 8 This is a three-dimensional structural diagram of a micro inverter with a connector in the third embodiment of the present invention;

[0031] Figure 9 for Figure 8 A three-dimensional structural breakdown diagram;

[0032] Figure 10 This is a three-dimensional structural diagram of a micro inverter with a connector in the fourth embodiment of the present invention.

[0033] Figure 11 This is a schematic diagram of the micro inverter system in the fifth embodiment of this utility model;

[0034] The components include: 1. Connector body; 2. Female terminal assembly; 20. Female terminal housing; 21. Open end; 22. Receiving cavity; 23. Bus L line; 24. Bus N line; 25. Bus 485 communication line; 4. Protective tube; 5. Protective sleeve; 6. Miniature inverter; 60. Bayonet; 8. Waterproof silicone pad; 7. Rubber ring; 9. Miniature inverter with connector; 10. Power grid assembly; 11. Communication adapter assembly; 36. Upper latch; 37. Lower latch; 26. Upper latch slot; 27. Lower latch slot;

[0035] 220, First mounting base; 221, Second mounting base; 223, Third mounting base; 320, First connector; 321, Second connector; 322, Third connector; 221a, Foolproof bevel; 221b, Foolproof groove;

[0036] 3. The male terminal assembly; 30. Male terminal housing; 31. Socket end; 32. Receiving cavity; 33. Male L line; 34. Male N line; 35. Male 485 communication line; 330. First male L line; 340. First male N line; 350. Male 485 communication line. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0038] The specific implementation of the embodiments of this application will be further described below with reference to the accompanying drawings.

[0039] First Embodiment

[0040] like Figures 2 to 5 As shown, the first embodiment of this application provides a connector 1, which consists of a female end assembly 2 and a male end assembly 3 that are inserted and connected.

[0041] The female end assembly 2 includes a female end shell 20 with an elliptical outer contour. The right end of the female end shell 20 is an open end 21. The interior of the open end 21 is provided with a receiving cavity 22 along the axial direction. The receiving cavity 22 contains a female L line 24, a female N line 23, and two female 485 communication lines 25. The two female 485 communication lines 25 are arranged vertically and parallel between the female L line 24 and the female N line 23. The interface ends of the female L line 24, the female N line 23, and the female 485 communication lines 25 point towards the male end assembly 2. The connection ends of the female L line 23, the female N line 24, and the female 485 communication lines extend outward from the female end shell 2.

[0042] The male terminal assembly 3 includes a male terminal housing 30 with a stepped elliptical outer contour. One end of the male terminal housing 30 is a socket end 31 for insertion into the opening end 21. In this embodiment, the socket end 31 is inserted into the receiving cavity 22. The socket end 31 has a receiving cavity 32 formed along the axial direction inside. The receiving cavity has a male L line 34, a male N line 33, and two male 485 communication lines 35. The two male 485 communication lines 35 are arranged vertically and parallel between the male L line 34 and the male N line 33, and the terminals of the male L line, the male N line, and the male 485 communication lines extend from the rear end of the male terminal housing 30.

[0043] During installation, the insertion ends of the male L-line 34, male N-line 33, and male 485 communication line 35 are respectively inserted into the interface ends of the female L-line, female N-line, and female 485 communication line. In this way, the male L-line and female L-line are connected to form a complete L-line, the male N-line and female N-line are connected to form a complete N-line, and the male 485 communication line and female 485 communication line are connected to form a complete 485 communication line. The L-line and N-line are equivalent to the live wire and ground wire in the power supply circuit, respectively. Together, they provide the power supply line and circuit for power transmission, ensuring stable power transmission.

[0044] In this embodiment, the two 485 communication lines built into the connector are used to carry electrical signals with the same voltage amplitude but opposite polarity, respectively, to realize data transmission. They are mainly used to realize the mutual transmission of micro-reverse operation data, such as power generation, temperature, fault information, etc.; and to receive control commands issued by the system, such as start / stop, power adjustment, etc.

[0045] Meanwhile, because the two RS-485 communication lines use differential transmission, they transmit differential signals with equal amplitude but opposite polarity. When external interference signals act on these two RS-485 communication lines simultaneously, the induced currents generated by the interference signals on the two lines have the same polarity and similar amplitude. At the receiving end, the communication module obtains the difference between the two RS-485 communication line signals. The difference in the interference signals is almost zero, thus canceling each other out and greatly suppressing the impact of common-mode interference on the effective data signal. This allows RS-485 communication to maintain the accuracy and stability of data transmission even in environments with complex interference such as power grid harmonics and transient pulses. It effectively solves the problems of PLC communication being susceptible to power line interference and wireless WIFI being susceptible to electromagnetic radiation interference. This enables stable long-distance transmission, meets the industry's "long-distance transmission" requirements, and solves the environmental adaptability shortcomings of WIFI communication.

[0046] In addition, a metal shielding layer is provided on the two female 485 communication lines and the two male 485 communication lines. The shielding layer can block external electromagnetic radiation from entering the inside of the wires, which further increases the anti-interference capability during signal transmission.

[0047] See Figures 3 to 5The receiving cavity 22 is provided with a first mounting base 220, a second mounting base 221, and a third mounting base 223 arranged from left to right; the first mounting base 220, the second mounting base 221, and the third mounting base 223 have through holes through which the male N line, two male 485 communication lines, and the male L line pass; the receiving cavity 32 has a first plug-in interface 320, a second plug-in interface 321, and a third plug-in interface 322 for the insertion of the first mounting base, the second mounting base, and the third mounting base, respectively; the insertion ends of the male L line, the male N line, and the male 485 communication line pass through the first plug-in interface 320, the second plug-in interface 321, and the third plug-in interface 322, respectively, and point towards the female end assembly 2.

[0048] When the male component 3 and the female component 2 are plugged in, the first mounting base 220, the second mounting base 221 and the third mounting base 223 are respectively inserted into the first plug interface 320, the second plug interface 321 and the third plug interface 322 for connection, making the installation convenient and precise.

[0049] Furthermore, the second mounting base 221 has anti-foolproof bevels 221a on both sides of its top; the second insertion interface 321 has anti-foolproof grooves 221b that are adapted to the anti-foolproof bevels 221a. Thus, when the male end assembly 3 and the female end assembly 2 are inserted and connected, they can only be installed along a specific direction, ensuring that they will not be assembled incorrectly and making operation convenient.

[0050] Meanwhile, a rubber ring 7 is also provided on the outer contour of the male end component 3, which can improve the sealing performance when the male end component 3 and the female end component 2 are connected.

[0051] In addition, see Figure 3 and Figure 5 The outer contour of the male end shell 30 is stepped, and the male end shell 30 is provided with an upper buckle block 36 and a lower buckle block 37 arranged vertically; the upper end of the female end shell 20 has an upper buckle groove 26 that is snapped into the upper buckle block 36, and the top of the receiving cavity 22 has a lower buckle groove 27 that is snapped into the lower buckle block 37.

[0052] When the male terminal component 3 and the female terminal component 2 are plugged in, the upper latching block 36 is latched to the upper latching slot 26, and the lower latching block 37 is latched to the lower latching slot 27, thereby preventing the male terminal component and the female terminal component from coming loose after connection and ensuring stable power and communication transmission; secondly, in conjunction with limit and foolproof, it improves the accuracy and efficiency of installation and enhances the durability and reliability of the structure.

[0053] See Figure 1 In this embodiment, the terminals of the male L line 34, male N line 33 and male 485 communication line 35 are protected by the protective tube 4 after passing through the rear end of the male end shell 30, so as to realize unidirectional transmission, that is, "one out one".

[0054] When the connector in this embodiment is used, due to the presence of the built-in 485 communication line, its data transmission accuracy and stability are high, and it has a strong anti-interference capability.

[0055] Second Embodiment

[0056] like Figure 6 and Figure 7 As shown, the second embodiment of this application provides another connector, which differs from the connector in the first embodiment in that: the terminals of the male L line, male N line and male 485 communication line extend outwards by two first male L lines 330, two first male N lines 340 and two male 485 communication lines 350 respectively, and each first male L line 330, first male N line 340 and male 485 communication line 350 forms a group to form two sets of communication adapter components 11, which are then set on the left and right sides respectively. The two communication adapter components 11 are protected by two protective sleeves 5 respectively.

[0057] In this embodiment, in addition to the high accuracy and stability of data transmission and strong anti-interference capability of the connector in Embodiment 1, the connector can also perform dual-channel transmission, i.e., "one output to two". This allows the data processed by the current device or control commands to be transmitted to other devices to be transmitted simultaneously to two different objects.

[0058] Third Embodiment

[0059] like Figure 8 and Figure 9 As shown, the third embodiment of this application provides a micro inverter with a connector, including a micro inverter 6 and a connector 1; the micro inverter 6 has a bayonet 60; the connector 1 is fitted into the bayonet 60.

[0060] Specifically, the connection ends of the female L-line, female N-line, and female 485 communication line of the female end assembly 2 in the connector 1 are connected to the three corresponding interfaces of the connector 1; the wiring ends of the male L-line 33, male N-line 34, and male 485 communication line 35 are protected by the protective tube 4 through the rear end portion of the male end shell, thereby realizing unidirectional data transmission.

[0061] In addition, a waterproof silicone pad 8 is provided between the female end assembly 2 and the bayonet 60, which serves a waterproof function.

[0062] The micro inverter with connector in this embodiment has two differential transmission 485 communication lines, strong common-mode interference, is not affected by electromagnetic radiation, supports stable long-distance transmission, and can also perform stable one-to-one signal transmission.

[0063] Fourth embodiment

[0064] like Figure 10 As shown, the fourth embodiment of this application provides another micro inverter with a connector. The difference between it and the third embodiment is that the connector in this embodiment is the "one-to-two" connector with two sets of communication conversion components provided in the second embodiment. The micro inverter with a connector in this embodiment has the advantages of strong anti-interference ability, no electromagnetic radiation, and support for long-distance stable transmission. It can also perform dual-channel signal transmission.

[0065] Fifth Embodiment

[0066] See Figure 11 The fifth embodiment of this application provides a micro-inverter system, including multiple micro-inverters 9 with connectors as provided in the fourth embodiment. A set of communication adapters in any one of the micro-inverters 9 with connectors is electrically connected to a set of communication adapters 11 in the preceding micro-inverter with connectors, and another set of communication adapters 11 is connected to any one of the communication adapters in the following micro-inverter 9 with connectors. In this way, the multiple micro-inverters 9 with connectors are sequentially and electrically connected to each other. In practical applications, a set of communication adapters in the last micro-inverter with connectors is connected to a grid module 10, and a set of communication adapters in the first micro-inverter with connectors is connected to a photovoltaic module, thus forming a complete grid connection device.

[0067] In this embodiment, the microinverter system integrates multiple microinverters with connectors, enabling daisy-chain communication between them via built-in RS-485 communication lines. This facilitates data upload and download. RS-485 communication features differential transmission, providing strong anti-interference capabilities and effectively resisting external electromagnetic and power supply interference, ensuring stable signal transmission. Stable communication allows the system to acquire microinverter operating data promptly and accurately, facilitating monitoring and maintenance and reducing the system failure rate.

[0068] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A connector, characterized in that, The connector consists of a male terminal assembly and a female terminal assembly that are inserted and connected. The female end assembly includes a female end housing, one end of which is an open end. An accommodating cavity is formed inside the open end along the axial direction. The accommodating cavity contains a female L-line, a female N-line, and two female 485 communication lines. The interface ends of the female L-line, female N-line, and female 485 communication lines point towards the male end assembly. The connection ends of the female L-line, female N-line, and female 485 communication lines extend out from the female end housing. The male terminal assembly includes a male terminal housing, one end of which is a socket end for insertion into the open end. The socket end has an accommodating cavity along its axial direction, containing a male L-line, a male N-line, and two male 485 communication lines. The terminals of the male L-line, male N-line, and male 485 communication lines extend from the rear end of the male terminal housing. The insertion terminals of the male L-line, male N-line, and male 485 communication lines are respectively inserted into the interface terminals of the female L-line, female N-line, and female 485 communication lines, forming an L-line for providing a power supply line, an N-line for providing a power supply circuit, and two 485 communication lines for data transmission. The two 485 communication lines are used to carry electrical signals with the same voltage amplitude but opposite polarities.

2. The connector as described in claim 1, characterized in that: The accommodating cavity has a first mounting base, a second mounting base, and a third mounting base; the first mounting base, the second mounting base, and the third mounting base have through holes for accommodating the male L-line, two male 485 communication lines, and the male N-line; the accommodating cavity has a first connector, a second connector, and a third connector for insertion into the first mounting base, the second mounting base, and the third mounting base, respectively; the insertion ends of the male L-line, the male N-line, and the male 485 communication line extend from the first connector, the second connector, and the third connector, respectively, and point towards the female end assembly.

3. The connector as described in claim 2, characterized in that: The second mounting base has anti-foolproof bevels on both sides of its top; the second insertion interface has an anti-foolproof groove that is adapted to the anti-foolproof bevels.

4. The connector as described in claim 1, characterized in that: The two female 485 communication lines and the two male 485 communication lines are also equipped with a metal shielding layer.

5. The connector as described in claim 1, characterized in that: The terminals of the male L line, male N line, and male 485 communication line are protected by protective tubes after passing through the rear end of the male terminal housing.

6. The connector as described in claim 1 or 3, characterized in that: The terminals of the male L line, male N line, and male 485 communication line extend outwards to form two first male L lines, two first male N lines, and two male 485 communication lines, respectively. Each first male L line, first male N line, and male 485 communication line forms a group to form a communication adapter component, which is then set on both sides. The two communication adapter components are protected by two protective sleeves.

7. The connector as claimed in claim 1, characterized in that: The outer contour of the male end shell is stepped, and the male end shell is provided with an upper buckle block and a lower buckle block arranged vertically; the upper end of the female end shell has an upper buckle groove that is snapped into the upper buckle block, and the top of the receiving cavity has a lower buckle groove that is snapped into the lower buckle block.

8. The connector as claimed in claim 1, characterized in that: The two 485 communication lines are twisted together.

9. A miniature inverter with a connector, characterized in that: The device includes a microinverter and the connector as described in claim 6; the microinverter has a bayonet; the connector is disposed within the bayonet, and the connection ends of the female terminal assembly of the connector, namely the female L line, female N line and female 485 communication line, are connected to the corresponding communication interfaces on the microinverter; a waterproof silicone pad is also provided between the female terminal assembly and the bayonet.

10. A micro inverter system, characterized in that: It includes multiple microinverters with connectors as described in claim 9: one set of communication adapters in one of the microinverters with connectors is electrically connected to any set of communication adapters in the preceding microinverter with connectors, and another set of communication adapters is electrically connected to any set of communication adapters in the following microinverter with connectors.

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