Connector system, photovoltaic system

Abstract

This application relates to a connector system and a photovoltaic system. The connector system includes a plurality of connectors, each including at least one of a first connector, a second connector, and a third connector. Each of the first, second, and third connectors includes a first connecting terminal and a second connecting terminal electrically connected to the first connecting terminal. The first connector is configured to connect at a distance greater than a first preset distance; the second connector is configured to connect at a distance less than or equal to the first preset distance; and the third connector is configured to have at least two first connecting terminals and / or two second connecting terminals. Operators can flexibly select any one or more of the first, second, and third connectors in any combination for installation, meeting the connection requirements of different distances and numbers of power converters. This helps reduce material and installation time costs, and also helps reduce safety hazards and improve the safety of the photovoltaic system.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and in particular to connector systems and photovoltaic systems. Background Technology

[0002] The power converters involved in this application are power conversion devices used to convert electrical energy from one form to another, realizing energy transmission and control under different power requirements. Common examples include photovoltaic inverters, energy storage converters, optimizers, microinverters, and uninterruptible power supplies (UPS). For example, a power converter can convert DC direct current to AC alternating current. The DC input terminal of the power converter is connected to a DC source (photovoltaic module), and the AC output terminal can be connected to an AC power grid and AC equipment.

[0003] In practical applications, multiple power converters need to be electrically connected to one point for centralized management, thereby connecting to the power grid or loads within the grid. However, due to the diverse and sometimes complex terrain of power converter installation sites, various types of connecting cables of different specifications are required when electrically connecting the different power converters.

[0004] In the existing technology, the types of power converter connection cables are relatively limited and cannot adapt to complex installation environments. Utility Model Content

[0005] Therefore, it is necessary to provide a connector system and a photovoltaic system to address the problem that conventional connectors used in photovoltaic systems cannot adequately meet the connection requirements of power converters in complex scenarios.

[0006] This application provides a connector system including a plurality of connectors, the connectors including at least one of a first connector, a second connector, and a third connector. This application also provides that the first connector, the second connector, and the third connector each include a first connecting terminal and a second connecting terminal electrically connected to the first connecting terminal; the first connecting terminal is configured to connect to the second connecting terminal of other connectors; the second connecting terminal is configured to connect to the first connecting terminal of other connectors; the first connector is configured to have a connection distance greater than a first preset distance; the second connector is configured to have a connection distance less than or equal to the first preset distance; and the third connector is configured to have a number of first connecting terminals and / or second connecting terminals greater than or equal to two.

[0007] According to one embodiment of this application, the first connector includes a first connecting terminal, a second connecting terminal, the first connecting terminal and the second connecting terminal, and a connecting wire connecting the first connecting terminal and the second connecting terminal; and / or, the second connector includes two first connecting terminals and a second connecting terminal, wherein one of the first connecting terminals is connected to the other first connecting terminal and the other second connecting terminal respectively; and / or, the third connector includes two first connecting terminals and a second connecting terminal, wherein the second connecting terminal is connected to the two first connecting terminals respectively.

[0008] According to one embodiment of this application, the connector system includes a second connector; one of the first connection terminals of the second connector is configured to connect to the output terminal of a power converter; the second connection terminal of the second connector is configured to connect to the first connection terminals of other second connectors, or to be electrically connected directly or indirectly to a load.

[0009] According to one embodiment of this application, two or more second connectors and the power converter are correspondingly provided; wherein, some of the second connectors are configured such that: one of the first connection terminals is connected to the output terminal of the power converter, another first connection terminal is blocked, and the second connection terminal is connected to one of the first connection terminals of another second connector; some of the second connectors are configured such that: the second connection terminal is electrically connected directly or indirectly to the load, one of the first connection terminals is connected to the output terminal of the power converter, and another first connection terminal is connected to the second connection terminal of another second connector.

[0010] According to one embodiment of this application, the connector system includes at least one first connector and at least one second connector; the first connection terminal of the second connector is indirectly connected to the output terminal of the power converter through at least one first connector; and / or, the second connection terminal of the second connector is indirectly connected to the load through at least one first connector.

[0011] According to one embodiment of this application, the connector system includes at least one first connector and at least two second connectors, wherein the first connection terminal of one of the second connectors is indirectly connected to the second connection terminal of the other second connector via at least one first connector.

[0012] According to one embodiment of this application, the connector system includes at least one second connector and at least one third connector, wherein at least one first connection terminal of the third connector is directly or indirectly electrically connected to a second connection terminal of the second connector.

[0013] According to one embodiment of this application, the connector system includes at least one first connector, at least two second connectors, and at least one third connector; two first connection terminals of the third connector are respectively connected to the second connection terminals of the second connectors through the first connectors, one of the first connection terminals of the second connectors is connected to a power converter, and the other first connection terminal of the second connector is closed or connected to the second connection terminal of another connector; or, one first connection terminal of the third connector is indirectly connected to the second connection terminal of one of the second connectors through the first connector; the other first connection terminal of the third connector is directly electrically connected to the second connection terminal of the second connector, one of the first connection terminals of the second connectors is connected to a power converter, and the other first connection terminal of the second connector is closed or connected to the second connection terminal of another connector.

[0014] According to one embodiment of this application, the number M of power converters carried by at least one of the first connector, the second connector, and the third connector satisfies: M ≤ P / P max P = I * U; where M is an integer, P is the maximum power carrying capacity of the first connector, the second connector, or the third connector, and P max I represents the maximum output power of the power converter, I represents the maximum current carrying capacity of the first connector, the second connector, or the third connector, and U represents the operating voltage of the first connector, the second connector, or the third connector.

[0015] According to one embodiment of this application, the connector system further includes: a single-phase adapter connector, one end of which is provided with the first connection terminal, the first connection terminal of which is adapted to be connected to the second connection terminal of the first connector, the second connector or the third connector, and the other end of which is adapted to be electrically connected to a load.

[0016] According to one embodiment of this application, the connector system includes a second connector and the single-phase adapter connector, wherein a first connection end of the second connector is connected to the output end of the power converter, and a second connection end of the second connector is connected to the first connection end of the single-phase adapter connector; or, the connector system includes a first connector, a second connector, and the single-phase adapter connector, wherein the second connector is connected to the output end of the power converter, and the first connector is connected to the second connector and the single-phase adapter connector; or, the connector system includes a second connector, a third connector, and the single-phase adapter connector, wherein the second connector is connected to the output end of the power converter, and the third connector is connected to the second connector through the first connector and is electrically connected to the single-phase adapter connector.

[0017] According to one embodiment of this application, the connector system further includes: a three-phase adapter connector, the three-phase adapter connector including three first connection terminals and a third connection terminal, any one of the first connection terminals of the three-phase adapter connector being adapted to be connected to the second connection terminal of the first connector, the second connector or the third connector, and the third connection terminal being adapted to be electrically connected to a load.

[0018] According to one embodiment of this application, the number of power converters connected to the three first connection terminals of the three-phase adapter connector is equal.

[0019] According to one embodiment of this application, the connector system includes a second connector and the three-phase adapter connector, wherein the first connection terminal of the second connector is connected to the output terminal of the power converter, and the second connection terminal of the second connector is connected to the first connection terminal of the three-phase adapter connector; or, the connector system includes a first connector, a second connector, and the three-phase adapter connector, wherein the second connector is connected to the output terminal of the power converter, and the first connector is connected to the second connector and the three-phase adapter connector; or, the connector system includes a second connector, a third connector, and the three-phase adapter connector, wherein the second connector is connected to the output terminal of the power converter, and the third connector is connected to the second connector and the three-phase adapter connector; or, the connector system includes a first connector, a second connector, a third connector, and a single-phase adapter connector, wherein the second connector is connected to the output terminal of the power converter, and the third connector is connected to the second connector through the first connector and is electrically connected to the three-phase adapter connector.

[0020] This application also provides a photovoltaic system, including: at least one of a power converter and a load; and a connector system according to the above embodiments, the connector system being connected to at least one of the power converter and the load.

[0021] The aforementioned connector system and photovoltaic system include three types of connectors: first connector, second connector, and third connector. These can meet the connection requirements of power converters with different distances and numbers. In practical applications, operators can flexibly choose any one or more combinations of the first, second, and third connectors for installation without increasing the wire diameter of all connectors and reducing or avoiding on-site wire pressing operations. Therefore, it is beneficial to reduce material costs and installation time costs, as well as reduce safety hazards and improve the safety of photovoltaic system use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the connection structure between the connector and the power converter in conventional technology.

[0023] Figure 2 This is a schematic diagram of the structure of the first connector in a connector system provided in an embodiment of this application.

[0024] Figure 3 This is a schematic diagram of the structure of the second connector in a connector system provided in an embodiment of this application.

[0025] Figure 4 This is a schematic diagram of the structure of the third connector in a connector system provided in an embodiment of this application.

[0026] Figure 5 This is a schematic diagram of the connector system provided in one embodiment of this application.

[0027] Figure 6 This is a schematic diagram of a connector system provided in another embodiment of this application.

[0028] Figure 7 This is a schematic diagram of a connector system provided in another embodiment of this application.

[0029] Figure 8 This is a schematic diagram of a connector system provided in another embodiment of this application.

[0030] Figure 9 This is a schematic diagram of a connector system provided in another embodiment of this application.

[0031] Figure 10 This is a schematic diagram of a connector system provided in another embodiment of this application.

[0032] Figure 11 This is a schematic diagram of a connector system provided in another embodiment of this application.

[0033] Figure 12 This is a schematic diagram of a connector system provided in another embodiment of this application.

[0034] Figure 13 This is a schematic diagram of the structure of a single-phase adapter connector in a connector system provided in an embodiment of this application.

[0035] Figure 14 This is a schematic diagram of the structure of a three-phase adapter connector in a connector system provided in an embodiment of this application.

[0036] Figure label:

[0037] 10. First connecting terminal; 20. Second connecting terminal; 30. Third connecting terminal; 40. Connecting wire;

[0038] 100. First connector;

[0039] 200. Second connector;

[0040] 300. Third connector;

[0041] 400. Single-phase adapter connector;

[0042] 500. Three-phase adapter connector;

[0043] 600. Power converter. Detailed Implementation

[0044] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0045] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0046] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0050] like Figure 1 As shown, conventional connectors used in photovoltaic systems employ multiple connecting wires of equal length and thickness to sequentially connect multiple terminals. This approach cannot adequately meet the connection requirements of power converters in complex scenarios. Specifically, to meet the power expansion needs of photovoltaic systems, the overall diameter of the connecting wires needs to be increased, resulting in higher material costs. Furthermore, power converters are typically installed close to photovoltaic panels. Due to the irregular arrangement of most installed photovoltaic panels in actual application scenarios (such as user rooftops) caused by site constraints, differences inevitably exist in the distances between power converters and between the power converter and the load. This necessitates on-site wire crimping of connectors based on the distances to the power converters, which not only increases installation time but also incurs additional installation costs.

[0051] like Figure 1 As shown, in conventional technology, to meet the power expansion requirements of photovoltaic systems, it is necessary to increase the overall connection wire diameter by 40 mm. Furthermore, to accommodate the differences in spacing between power converters, on-site wire pressing is required, resulting in high material costs, installation costs, and time costs.

[0052] Combination Figure 11 or Figure 12The connector system of this application embodiment can be applied to a photovoltaic system to realize direct or indirect connection between power converters 600 and / or between a power converter 600 and a load in the photovoltaic system. Specifically, the connector system of this application embodiment includes a plurality of connectors, including at least one of a first connector 100, a second connector 200, and a third connector 300. The first connector 100, the second connector 200, and the third connector 300 each include a first connecting terminal 10 and a second connecting terminal 20 electrically connected to the first connecting terminal 10. The first connecting terminal 10 is configured to connect to the second connecting terminal 20 of other connectors, and the second connecting terminal 20 is configured to connect to the first connecting terminal 10 of other connectors. Thus, the first connector 100, the second connector 200, and the third connector 300 can be connected to each other in any combination.

[0053] The first connector 100 is configured to have a connection distance greater than a first preset distance. The second connector 200 is configured to have a connection distance less than or equal to the first preset distance. The third connector 300 is configured to have a number of first connection terminals 10 and / or second connection terminals 20 greater than 2.

[0054] It is worth noting that the connection distance mentioned above refers to the path length of the wiring, not specifically the straight-line distance between two connection points. When there are obstacles, it is necessary to bypass the obstacles to make the connection, and the connection distance will be greater than the straight-line distance between the two connection points. For example, when the same connector contains only one first connection terminal 10 and one second connection terminal 20, the maximum distance that can be formed between the first connection terminal 10 and the second connection terminal 20 of the connector is the connection distance. In addition, the first connector 100, the second connector 200, and the third connector 300 can be directly connected to the power converter 600 or indirectly connected to the power converter 600.

[0055] In this embodiment, the first connector 100 and the second connector 200 have different connection distances in the connector system. Therefore, one or more combinations of the first connector 100, the second connector 200 and the third connector 300 can be flexibly selected for installation according to the actual distance between the points to be connected, thereby reducing or avoiding on-site wire pressing operations, which helps to reduce the difficulty of operation and improve the efficiency of operation.

[0056] The number of the first connection terminal 10 and / or the second connection terminal 20 of the third connector 300 is greater than or equal to 2. Only the total wire diameter of the third connector 300 needs to be increased to meet the expansion requirements, without the need to uniformly increase the wire diameter of the first connector 100, the second connector 200 and the third connector 300. Therefore, it is beneficial to reduce material costs. It is worth noting that the above-mentioned increase in the total wire diameter of the third connector 300 does not specifically refer to the total wire diameter. It can also mean that two or more wires of the third connector 300 are connected to the terminals (first connection terminal 10 or second connection terminal 20) at the same time. Since the terminals can carry a larger current, the overall carrying capacity of the third connector 300 can be improved. Thus, the application of the third connector 300 to the connector system can meet the expansion requirements.

[0057] Taking the first connection terminal 10 as suitable for connecting to the output terminal of the power converter 600, and the third connector 300 including two first connection terminals 10 as an example, assuming the minimum output power of a single power converter 600 is P min It is 250W, with a maximum output power P max The power rating is 400W, the operating voltage is U = 220V, the maximum current carrying capacity of the second connector 200 is I2 = 15A, and the maximum current carrying capacity of the third connector 300 is I3 = 30A. Therefore, under an operating voltage of 220V, the maximum power carrying capacity of the second connector 200 is P1 = I2 * U = 3300W, and the number of power converters 600 it can support is [P1 / P...]. max P1 / P min Rounding down to the nearest integer, the value is between 8 and 13. To ensure safety, the minimum value is usually taken, meaning that the second connector 200 can support 8 power converters 600.

[0058] At a working voltage of 220V, the maximum power carrying capacity of the third connector 300 is P2 = I3 * U = 6600W, and the number of power converters 600 it can support is [P2 / P max P2 / P min The value is between 16 and 26. To ensure safety, the minimum value is usually chosen, meaning the third connector 300 can support 16 power converters 600. It is evident that the number of power converters 600 supported is limited when only the second connector 200 is connected. However, by combining the second connector 200 with the third connector 300 (e.g., connecting both second connectors 200 to the third connector 300), capacity can be expanded. The same principle applies to combining the first connector 100 with the third connector 300, and will not be elaborated upon here.

[0059] In some embodiments, the number M of power converters 600 carried by at least one of the first connector 100, the second connector 200, and the third connector 300 satisfies:

[0060] M≤P / P max ;

[0061] P = I * U;

[0062] Where M is an integer, P is the maximum carrying power of the first connector 100, the second connector 200, or the third connector 300, and P max I represents the maximum output power of the power converter 600, I represents the maximum current carried by the first connector 100, the second connector 200, or the third connector 300, and U represents the operating voltage of the first connector 100, the second connector 200, or the third connector 300.

[0063] Preferably, the power converter 600 of the first connector 100 and the second connector 200 carries 7 units, and the power converter 600 of the third connector 300 carries 14 units.

[0064] Combination Figure 2 In some embodiments, the first connector 100 includes a first connection terminal 10, a second connection terminal 20, the first connection terminal 10 and the second connection terminal 20, and a connecting line 40 connecting the first connection terminal 10 and the second connection terminal 20.

[0065] The first connection terminal 10 of the first connector 100 can be connected to the power converter 600, or to the second connection terminal 20 of another connector. The second connection terminal 20 of the first connector 100 can be connected to the first connection terminal 10 of another connector, or to a load.

[0066] The first connector 100 can achieve a long-distance connection. Since it only has one first connection terminal 10 and one second connection terminal 20, when connecting two points over a long distance, only the operator needs to insert the terminals, without the need for complicated wire stripping and wiring operations, thus ensuring the dustproof and waterproof capabilities of the connection.

[0067] When multiple first connectors 100 are provided, the lengths of the connecting lines 40 of each first connector 100 may be equal or unequal, and no specific limitation is made here. Optionally, the length of the connecting lines 40 of the first connector 100 is between 10m and 25m. For example, the lengths of the connecting lines 40 of the first connector 100 include 10m, 15m, 20m and 25m.

[0068] Combination Figure 3In some embodiments, the second connector 200 includes two first connection terminals 10 and one second connection terminal 20, wherein one of the first connection terminals 10 is connected to the other first connection terminal 10 and the other second connection terminal 20 respectively. The two first connection terminals 10 and one of the first connection terminals 10 and the second connection terminal 20 can be connected by a connecting wire 40.

[0069] The second connector 200 in this embodiment can enable the connection of the power converter 600 over a short distance. For example, the first connector 10, which is not connected to the second connector 20, can be connected to the output terminal of the power converter 600. The other first connector 10 can be connected to the second connector 20 of other connectors or blocked. The second connector 20 of the second connector 200 is electrically connected to the load directly or indirectly.

[0070] It is worth noting that the lengths of the connecting wires 40 used to connect the two first connecting terminals 10 and the connecting wires 40 used to connect the first connecting terminals 10 and the second connecting terminals 20 in the second connector 200 can be equal or unequal. Optionally, the length of the connecting wires 40 used to connect the two first connecting terminals 10 is less than the length of the connecting wires 40 used to connect the first connecting terminals 10 and the second connecting terminals 20. For example, the length of the connecting wires 40 used to connect the two first connecting terminals 10 is between 0.5m and 3m, and the length of the connecting wires 40 used to connect the first connecting terminals 10 and the second connecting terminals 20 is between 5m and 20m.

[0071] Combination Figure 4 In some embodiments, the third connector 300 includes two first connection terminals 10 and a second connection terminal 20, with the second connection terminal 20 connected to the two first connection terminals 10 respectively.

[0072] The third connector 300 in this embodiment can realize the convergence of multiple power converters 600. For example, the two first connection terminals 10 of the third connector 300 can be directly or indirectly connected to the power converters 600 respectively, and the second connection terminal 20 of the third connector 300 can be directly or indirectly electrically connected to the load.

[0073] It is worth noting that the connecting lines 40 of the two first connecting terminals 10 and the second connecting terminal 20 of the third connector 300 can be connected to a thickened connecting line 40 for busing and then connected to the second connecting terminal 20 through the thickened connecting line 40, or they can be connected to the second connecting terminal 20 separately and then bused through the second connecting terminal 20. No specific limitation is made here.

[0074] Furthermore, the diagram only shows the appearance of the connecting wire 40. As for the internal structure of the connecting wire 40 and the electrical connection relationship between each connecting wire 40 and the terminal, whether it is connected in series or in parallel, it is not limited here.

[0075] The combination of the first connector 100, the second connector 200 and the third connector 300 in the above embodiment can simultaneously meet the connection requirements of the power converter 600 in both long-distance and short-distance scenarios. Operators can select an appropriate number of the first connector 100, the second connector 200 and the third connector 300 for installation according to actual needs.

[0076] Several arrangements of connector systems will be described below as examples.

[0077] Combination Figure 5 In some embodiments, the connector system includes a second connector 200, one of the first connection terminals 10 of the second connector 200 being configured to connect to the output of the power converter 600; and a second connection terminal 20 of the second connector 200 being configured to connect to the first connection terminals 10 of other second connectors 200, or to be electrically connected directly or indirectly to a load.

[0078] In this embodiment, the power converter 600 is connected using the second connector 200. The first connection terminal 10 of the second connector 200, which is not connected to the power converter 600, can be closed or connected to the second connection terminal 20 of other connectors. When the first connection terminal 10 of the second connector 200 is not closed, it can be used to connect the first power converter 600 in a scenario where multiple power converters 600 are connected. When the first connection terminal 10 of the second connector 200, which is not connected to the power converter 600, is connected to the second connection terminal 20 of other connectors, it can connect the power converter 600 located in the middle position in a scenario where multiple power converters 600 are connected.

[0079] Combination Figure 6 Optionally, two or more second connectors 200 and power converters 600 are provided correspondingly; wherein, some second connectors 200 are configured such that: one first connection terminal 10 is connected to the output terminal of the power converter 600, the other first connection terminal 10 is blocked, and the second connection terminal 20 is connected to one of the first connection terminals 10 of another second connector 200; some second connectors 200 are configured such that: the second connection terminal 20 is electrically connected directly or indirectly to the load, one first connection terminal 10 is connected to the output terminal of the power converter 600, and the other first connection terminal 10 is connected to the second connection terminal 20 of another second connector 200. Thus, two or more adjacent power converters 600 can be connected through two or more second connectors 200.

[0080] In other embodiments, the connector system includes at least one first connector 100 and at least one second connector 200. For example... Figure 7 As shown, the first connection terminal 10 of the second connector 200 is indirectly connected to the output terminal of the power converter 600 via at least one first connector 100; and / or, as shown Figure 8 As shown, the second connection terminal 20 of the second connector 200 is indirectly connected to the load via at least one first connector 100.

[0081] In this embodiment, the combination of the first connector 100 and the second connector 200 can meet the connection requirements over long distances. Specifically, when multiple power connectors are connected via the second connector 200, and some power connectors are far from the first connection terminal 10 of the second connector 200, the power connectors and the first connection terminal 10 of the second connector 200 can be connected via the first connector 100; when the second connection terminal 20 of the second connector 200 is far from the load, at least one first connector 100 is provided between the second connection terminal 20 of the second connector 200 and the load.

[0082] Combination Figure 9 In other embodiments, the connector system includes at least one first connector 100 and at least two second connectors 200, wherein a first connection terminal 10 of one second connector 200 is indirectly connected to a second connection terminal 20 of the other second connector 200 via at least one first connector 100.

[0083] This implementation can meet the situation where multiple power connectors are electrically connected through the second connector 200, and some power connectors are far apart from adjacent power connectors. When two adjacent power connectors are far apart, the two second connectors 200 that connect the two power connectors cannot be directly connected. In this case, the two second connectors 200 can be indirectly connected through at least one first connector 100, thereby realizing the connection between the power connectors.

[0084] Combination Figure 10 In other embodiments, the connector system includes at least one second connector 200 and at least one third connector 300, wherein at least one first connection terminal 10 of the third connector 300 is electrically connected directly or indirectly to the second connection terminal 20 of the second connector 200.

[0085] For example, one of the first connection terminals 10 of the third connector 300 is connected to the second connection terminal 20 of the second connector 200, the first connection terminal 10 of the second connector 200 is connected to some of the power converters, and the other first connection terminal 10 of the second connector 200 is connected to other power converters; or, both first connection terminals 10 of the third connector 300 are connected to the second connector 200, and each second connector 200 is connected to a power converter.

[0086] In this embodiment, combining the second connector 200 and the third connector 300 can enable the convergence of different power converter branches.

[0087] In other embodiments, the connector system includes at least one first connector 100, at least two second connectors 200, and at least one third connector 300.

[0088] Combination Figure 11 As an optional configuration, the two first connection terminals 10 of the third connector 300 are respectively connected to the second connection terminals 20 of the second connector 200 via the first connector 100. One of the first connection terminals 10 of the second connector 200 is connected to a power converter, and the other first connection terminal 10 of the second connector 200 is either closed or connected to the second connection terminal 20 of another connector. In other words, each first connection terminal 10 of the third connector 300 is connected to the first connector 100, while one of the two first connection terminals 10 of the second connector 200 is connected to the power converter, and the other first connection terminal 10 is either closed or connected to another connector.

[0089] Combination Figure 12 As an optional configuration, one first connection terminal 10 of the third connector 300 is indirectly connected to the second connection terminal 20 of one of the second connectors 200 via the first connector 100; the other first connection terminal 10 of the third connector 300 is directly electrically connected to the second connection terminal 20 of the second connector 200; one of the first connection terminals 10 of the second connector 200 is connected to a power converter; and the other first connection terminal 10 of the second connector 200 is closed or connected to the second connection terminal 20 of another connector.

[0090] In this embodiment, the third connector 300 can be used to realize the convergence between two power converter branches, the second connector 200 can be used to connect a single power converter, or to realize the connection of two or more power converters, and the first connector 100 is used to realize the long-distance connection between the third connector 300 and the second connector 200.

[0091] In some other embodiments, multiple third connectors 300 may be provided. For example, the power converter is arranged with multiple branches, some of which are third connectors 300 to realize the merging between some power converter branches, and other third connectors 300 to realize the merging of the merged branches with other power converter branches.

[0092] As can be seen from the above embodiments, the connector system of this application can adapt to various connection requirements through the combination of the first connector 100, the second connector 200, and the third connector 300, and has the advantage of wide applicability. Of course, the combination of the first connector 100, the second connector 200, and the third connector 300 is not limited to the above-mentioned types. Other different connection methods can also be formed through flexible combinations of the first connector 100, the second connector 200, and the third connector 300. For the sake of simplicity, they are not listed here.

[0093] Combination Figure 13 In some embodiments, the connector system further includes a single-phase adapter connector 400, one end of which is provided with a first connection terminal 10. The first connection terminal 10 of the single-phase adapter connector 400 is adapted to be connected to the second connection terminal 20 of the first connector 100, the second connector 200 or the third connector 300, and the other end of the single-phase adapter connector 400 is adapted to be electrically connected to a load.

[0094] In this embodiment, the single-phase adapter connector 400 is provided with a first connection terminal 10 at one end, which can be connected to the second connection terminal 20 of any of the first connector 100, the second connector 200 and the third connector 300. Therefore, it can be adapted to various application scenarios by combining the first connector 100, the second connector 200 and the third connector 300 in different ways. Furthermore, it does not require an additional adapter structure to connect to the first connector 100, the second connector 200 and the third connector 300, which has the advantage of being more convenient to install and use.

[0095] For example, the connector system includes a second connector 200 and a single-phase adapter connector 400, with a first connection end of the second connector 200 connected to the output end of the power converter 600, and a second connection end of the second connector 200 connected to the first connection end of the single-phase adapter connector 400; or, the connector system includes a first connector 100, a second connector 200, and a single-phase adapter connector 400, with the second connector 200 connected to the output end of the power converter 600, and the first connector 100 connected to the second connector 200 and the single-phase adapter connector 400; or, the connector system includes a first... The system comprises a second connector 200, a third connector 300, and a single-phase adapter connector 400. The second connector 200 is connected to the output terminal of the power converter 600, and the third connector 300 is connected to the second connector 200 and the single-phase adapter connector 400. Alternatively, the connector system comprises a first connector 100, a second connector 200, a third connector 300, and a single-phase adapter connector 400. The second connector 200 is connected to the output terminal of the power converter 600, and the third connector 300 is connected to the second connector 200 through the first connector 100 and is electrically connected to the single-phase adapter connector 400.

[0096] The above examples only demonstrate a few possible combinations of the single-phase adapter connector 400 with the first connector 100, the second connector 200, and the third connector 300 to achieve single-phase output. For specific connection methods, please refer to the description of the connection methods between the first connector 100, the second connector 200, and the third connector 300. In actual use, operators can flexibly choose other connection methods besides those shown in the examples, depending on the site conditions; no specific limitations are imposed here.

[0097] Combination Figure 14 In other embodiments, the connector system further includes a three-phase adapter connector 500, which includes three first connection terminals 10 and a third connection terminal 30. Any of the first connection terminals 10 of the three-phase adapter connector 500 is adapted to be connected to a second connection terminal 20 of a first connector 100, a second connector 200, or a third connector 300, and the third connection terminal 30 is adapted to be electrically connected to a load.

[0098] In this embodiment, each phase input of the three-phase adapter connector 500 uses a first connection terminal 10. Therefore, it can be connected to the power converter 600 by cooperating with at least one of the first connector 100, the second connector 200, and the third connector 300. The flexible combination of the first connector 100, the second connector 200, and the third connector 300 can meet the usage requirements in different scenarios.

[0099] For example, the connector system includes a second connector 200 and a three-phase adapter connector 500, with the first connection terminal 10 of the second connector 200 connected to the output terminal of the power converter 600, and the second connection terminal 20 of the second connector 200 connected to the first connection terminal 10 of the three-phase adapter connector 500; or, the connector system includes a first connector 100, a second connector 200, and a three-phase adapter connector 500, with the second connector 200 connected to the output terminal of the power converter 600, and the first connector 100 connected to both the second connector 200 and the three-phase adapter connector 500; or, the connector system... The system includes a second connector 200, a third connector 300, and a three-phase adapter connector 500. The second connector 200 is connected to the output terminal of the power converter 600, and the third connector 300 is connected to the second connector 200 and the three-phase adapter connector 500. Alternatively, the connector system includes a first connector 100, a second connector 200, a third connector 300, and a single-phase adapter connector 400. The second connector 200 is connected to the output terminal of the power converter 600, and the third connector 300 is connected to the second connector 200 through the first connector 100 and is electrically connected to the three-phase adapter connector 500.

[0100] The above examples only demonstrate a few possible combinations of the three-phase adapter connector 500 with the first connector 100, the second connector 200, and the third connector 300 to achieve three-phase output. For specific connection methods, please refer to the description of the connection methods between the first connector 100, the second connector 200, and the third connector 300. In actual use, operators can flexibly choose other connection methods besides those shown in the examples, depending on the site conditions; no specific limitations are imposed here.

[0101] Optionally, the number of power converters 600 connected to the three first connection terminals 10 of the three-phase adapter connector 500 is equal, thereby ensuring that the three phases of the three-phase adapter connector 500 have equal voltages to ground, without the need for adjustment by other equipment.

[0102] This embodiment also provides a photovoltaic system, which includes at least one of a power converter 600 and a load, as well as the aforementioned connector system, which is connected to the power converter 600 and the load.

[0103] Furthermore, the photovoltaic system in this embodiment may also include photovoltaic panels and photovoltaic panel supports, etc.

[0104] Since the photovoltaic system of this embodiment includes the connector system of the above embodiment, it has all the advantages of the connector system, which will not be described again here.

[0105] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0106] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A connector system, characterized in that, The device includes a plurality of connectors, the connectors including at least one of a first connector, a second connector and a third connector, the first connector, the second connector and the third connector each including a first connecting terminal and a second connecting terminal electrically connected to the first connecting terminal, the first connecting terminal being configured to connect to the second connecting terminal of other connectors, and the second connecting terminal being configured to connect to the first connecting terminal of other connectors. The first connector is configured to connect at a distance greater than a first preset distance; The second connector is configured to connect at a distance less than or equal to a first preset distance; The third connector is configured such that the number of the first connection terminals and / or the second connection terminals is greater than or equal to 2.

2. The connector system according to claim 1, characterized in that, The first connector includes a first connection terminal, a second connection terminal, the first connection terminal and the second connection terminal, and a connection wire connecting the first connection terminal and the second connection terminal; and / or, The second connector includes two first connection terminals and one second connection terminal, wherein one of the first connection terminals is connected to the other first connection terminal and the other second connection terminal respectively; and / or, The third connector includes two first connection terminals and one second connection terminal, with the second connection terminal connected to the two first connection terminals respectively.

3. The connector system according to claim 2, characterized in that, The connector system includes the second connector; One of the first connection terminals of the second connector is configured to connect to the output of the power converter; The second connection terminal of the second connector is configured to connect to the first connection terminal of other second connectors, or to be electrically connected directly or indirectly to a load.

4. The connector system according to claim 3, characterized in that, The second connector and the power converter are provided in two or more corresponding positions; wherein, Part of the second connector is configured such that: one of the first connection terminals is connected to the output of the power converter, the other first connection terminal is blocked, and the second connection terminal is connected to one of the first connection terminals of another second connector; Part of the second connector is configured such that the second connection terminal is electrically connected directly or indirectly to the load, one of the first connection terminals is connected to the output of the power converter, and the other first connection terminal is connected to the second connection terminal of another second connector.

5. The connector system according to claim 2, characterized in that, The connector system includes at least one first connector and at least one second connector; The first connection terminal of the second connector is indirectly connected to the output terminal of the power converter through at least one of the first connectors; And / or, The second connector is indirectly connected to the load via at least one of the first connectors.

6. The connector system according to claim 2, characterized in that, The connector system includes at least one first connector and at least two second connectors, wherein the first connection terminal of one second connector is indirectly connected to the second connection terminal of the other second connector via at least one first connector.

7. The connector system according to claim 2, characterized in that, The connector system includes at least one second connector and at least one third connector, wherein at least one first connection terminal of the third connector is directly or indirectly electrically connected to a second connection terminal of the second connector.

8. The connector system according to claim 2, characterized in that, The connector system includes at least one first connector, at least two second connectors, and at least one third connector; The two first connection terminals of the third connector are respectively connected to the second connection terminals of the second connector through the first connector. One of the first connection terminals of the second connector is connected to the power converter, and the other first connection terminal of the second connector either closes off or connects to the second connection terminal of another connector; or... One of the first connection terminals of the third connector is indirectly connected to the second connection terminal of one of the second connectors through the first connector; the other first connection terminal of the third connector is directly electrically connected to the second connection terminal of the second connector; one of the first connection terminals of the second connector is connected to a power converter; and the other first connection terminal of the second connector is closed or connected to the second connection terminal of another connector.

9. The connector system according to claim 1, characterized in that, The number M of power converters carried by at least one of the first connector, the second connector, and the third connector satisfies: M < P / P max ; P = I * U; Where M is an integer, P is the maximum power carrying capacity of the first connector, the second connector, or the third connector, P max I represents the maximum output power of the power converter, I represents the maximum current carrying capacity of the first connector, the second connector, or the third connector, and U represents the operating voltage of the first connector, the second connector, or the third connector.

10. The connector system according to any one of claims 1 to 9, characterized in that, The connector system also includes: A single-phase adapter connector, wherein one end of the single-phase adapter connector is provided with the first connection terminal, the first connection terminal of the single-phase adapter connector is adapted to be connected to the second connection terminal of the first connector, the second connector or the third connector, and the other end of the single-phase adapter connector is adapted to be electrically connected to a load.

11. The connector system according to claim 10, characterized in that, The connector system includes the second connector and the single-phase adapter connector, wherein the first connection end of the second connector is connected to the output end of the power converter, and the second connection end of the second connector is connected to the first connection end of the single-phase adapter connector; or, The connector system includes a first connector, a second connector, and a single-phase adapter connector. The second connector is connected to the output terminal of the power converter, and the first connector is connected to the second connector and the single-phase adapter connector. or, The connector system includes a second connector, a third connector, and a single-phase adapter connector. The second connector is connected to the output terminal of the power converter, and the third connector is connected to the second connector and the single-phase adapter connector. or, The connector system includes a first connector, a second connector, a third connector, and a single-phase adapter connector. The second connector is connected to the output terminal of the power converter. The third connector is connected to the second connector through the first connector and is electrically connected to the single-phase adapter connector.

12. The connector system according to any one of claims 1 to 9, characterized in that, The connector system also includes: A three-phase adapter connector includes three first connection terminals and three third connection terminals. Any of the first connection terminals of the three-phase adapter connector is adapted to be connected to the second connection terminal of the first connector, the second connector, or the third connector. The third connection terminal is adapted to be electrically connected to a load.

13. The connector system according to claim 12, characterized in that, The number of power converters connected to the three first connection terminals of the three-phase adapter connector is equal.

14. The connector system according to claim 12, characterized in that, The connector system includes the second connector and the three-phase adapter connector, wherein the first connection terminal of the second connector is connected to the output terminal of the power converter, and the second connection terminal of the second connector is connected to the first connection terminal of the three-phase adapter connector; or, The connector system includes a first connector, a second connector, and a three-phase adapter connector. The second connector is connected to the output terminal of the power converter, and the first connector is connected to the second connector and the three-phase adapter connector. or, The connector system includes a second connector, a third connector, and a three-phase adapter connector. The second connector is connected to the output terminal of the power converter, and the third connector is connected to the second connector and the three-phase adapter connector. or, The connector system includes a first connector, a second connector, a third connector, and a single-phase adapter connector. The second connector is connected to the output terminal of the power converter. The third connector is connected to the second connector through the first connector and is electrically connected to the three-phase adapter connector.

15. A photovoltaic system, comprising: At least one of a power converter and a load; as well as The connector system as claimed in any one of claims 1 to 14, wherein the connector system is connected to at least one of the power converter and the load.

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