A busbar box

Abstract

The application discloses a current collection box, which comprises a circuit board and a conductive assembly. Three live wires and a zero wire of the circuit board are used for electrical communication with a three-phase charging pile respectively, and one live wire and the zero wire are used for electrical communication with a single-phase charging pile respectively. In a preset state, the conductive assembly is installed on the circuit board, and the conductive assembly is electrically short-circuited with the three live wires respectively. In a working state, the conductive assembly is maintained in the installation position in the preset state, and the conductive assembly and the zero wire are used for electrical communication with an external power supply respectively, so that the electric energy supplied by the external power supply is transmitted to the single-phase charging pile. Alternatively, the conductive assembly is separated from the three live wires, and the three live wires and the zero wire are used for electrical communication with the external power supply respectively, so that the electric energy supplied by the external power supply is transmitted to the three-phase charging pile. The conductive assembly is installed in a suitable position in advance, and the three live wires are electrically short-circuited in advance, so that the problem of wrong connection of the three live wires in subsequent electrical connection can be effectively prevented.

Description

Technical Field

[0001] This application relates to the field of power system technology, and in particular to a combiner box. Background Technology

[0002] The combiner box is a crucial component of a photovoltaic (PV) power generation system. Its primary function is to collect and distribute the direct current (DC) generated by the PV modules. The combiner box can independently support either a single-phase system or an RST three-phase system. The RST three-phase system can simultaneously supply both 220V and 380V, while the single-phase system supplies a relatively lower voltage to meet different power demands. When a single-phase system and an RST three-phase system share a circuit, short-circuiting the three live wires of the RST three-phase system allows for switching from an RST three-phase system to a single-phase system. However, during the installation and wiring of the combiner box, problems such as forgetting to short-circuit or incorrect short-circuiting can easily occur, leading to inconvenience in operation. Utility Model Content

[0003] This application provides a combiner box that can solve the problem of easy wiring errors in single-phase systems and RST three-phase systems.

[0004] This application provides a combiner box, which includes a circuit board and conductive components.

[0005] The circuit board has three live wires and one neutral wire. The three live wires and the neutral wire can be used to electrically connect with a three-phase charging pile, and one of the live wires and the neutral wire can also be used to electrically connect with a single-phase charging pile. The conductive components are detachably installed on the circuit board.

[0006] The combiner box has a preset state and a working state. In the preset state, the conductive component is installed on the circuit board and electrically short-circuited with the three live wires respectively. In the working state, the conductive component remains in the installation position of the preset state, and the conductive component and the neutral wire are respectively used to electrically connect with an external power source, so that the combiner box is in a single-phase power connection mode to deliver the power supplied by the external power source to the single-phase charging pile. Alternatively, the conductive component is separated from the three live wires respectively, and the three live wires and the neutral wire are respectively used to electrically connect with an external power source, so that the combiner box is in a three-phase power connection mode to deliver the power supplied by the external power source to the three-phase charging pile.

[0007] Based on the combiner box of this application embodiment, by setting conductive components to be installed on the circuit board in a preset state of the combiner box, and by pre-installing the conductive components in appropriate positions and pre-electrically short-circuiting the three live wires, it can effectively prevent the problem of incorrect connection when connecting the three live wires later. Furthermore, the conductive components are detachably installed on the circuit board, and the combiner box can be switched between single-phase charging mode and three-phase charging mode by changing the installation state of the conductive components. The structure is simple and the operation is convenient. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a three-dimensional structural diagram of a conductive component mounted on a circuit board according to an embodiment of this application;

[0010] Figure 2 This is a circuit diagram showing the conductive component electrically shorted to three live wires according to one embodiment of this application.

[0011] Figure 3 This is a circuit diagram of a conductive component in one embodiment of the present application that is not electrically shorted to the three live wires.

[0012] Figure 4 This is a three-dimensional structural diagram of the live wire interface and neutral wire interface provided on a circuit board according to an embodiment of this application;

[0013] Figure 5 This is a three-dimensional structural diagram of a shorting body and a live wire interface stacked in one embodiment of this application.

[0014] Figure 6 This is a cross-sectional view of a plurality of mounting holes located on opposite sides of a live wire interface according to an embodiment of this application.

[0015] Figure 7 A three-dimensional structural diagram of a conductive part corresponding to a mounting hole in one embodiment of this application;

[0016] Figure 8 This is a cross-sectional view of a first mounting portion rotatably mounted on a circuit board according to an embodiment of this application.

[0017] Figure 9 This is a three-dimensional structural diagram of a conductive component connected to a live wire interface according to an embodiment of this application.

[0018] Figure label:

[0019] 100. Live wire; 110. First main line; 120. First branch line; 130. First sub-line; 140. First transfer line; 101. R-phase live wire; 102. S-phase live wire; 103. T-phase live wire;

[0020] 200, Neutral wire; 210, Second main line; 220, Second branch line; 230, Second sub-line; 240, Second adapter wire;

[0021] 310. Live wire interface; 311. Mounting space; 312. Second mating hole; 320. Neutral wire interface; 330. Circuit board; 331. Edge area; 340. Insulating component;

[0022] 400, Conductive component; 410, Short-circuit body; 411, Mounting hole; 412, Assembly hole; 420, Limiting component; 430, Conductive part; 440, First mounting part; 450, Second mounting part; 460, Hanging part;

[0023] 510. Single-phase charging pile; 520. Three-phase charging pile; 610. Power grid; 620. Power generation equipment;

[0024] 1. Cabinet door; 2. Circuit board; 10. Main control module; 11. Relay; 12. Protection module; 13. Transformer module; 14. Communication terminal; 15. Wireless communication module; X, First direction. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] In some scenarios, users may only require a single-phase system or an RST three-phase system for power supply. If the combiner box has its own dedicated power supply path for each system, it can lead to waste and inconvenience. Related technologies use a shared circuit for both single-phase and RST three-phase systems, short-circuiting the three live wires of the RST three-phase system to switch it to a single-phase system. However, during the installation and wiring of the combiner box, problems such as forgetting to short-circuit or incorrect short-circuiting can easily occur due to improper wiring procedures, unclear wiring markings, or missing short-circuit components, making operation inconvenient. Therefore, this application provides a combiner box.

[0027] like Figure 1This is a three-dimensional structural diagram of a combiner box according to an embodiment of this application. The combiner box includes a box body and a circuit board 2. The circuit board 2 is disposed inside the box body, and the box body provides protection for the circuit board 2. The box body includes an openable door 1, which allows for the disassembly, assembly, and maintenance of the structural components of the circuit board 2 when the door 1 is open.

[0028] like Figure 2 and Figure 3 As shown, the circuit board 2 has three live wires 100 and one neutral wire 200. The three live wires 100 (including R-phase live wire 101, S-phase live wire 102, and T-phase live wire 103) and the neutral wire 200 (N-phase neutral wire 201) can be electrically connected to the three-phase charging pile 520 respectively. One of the live wires 100 and the neutral wire 200 can also be electrically connected to the single-phase charging pile 510 respectively.

[0029] The combiner box also includes a conductive component 400, which is detachably mounted on the circuit board 2. In this embodiment, the combiner box has a single-phase power connection mode and a three-phase power connection mode, such as... Figure 2 As shown, in single-phase power connection mode, the conductive component 400 is installed on the circuit board 2. The conductive component 400 is electrically short-circuited to the three live wires 100 respectively. The conductive component 400 and the neutral wire 200 are used to electrically connect to the external power supply to transmit the electrical energy supplied by the external power supply to the single-phase charging pile 510; as shown Figure 3 As shown, in the three-phase power connection mode, the conductive component 400 is separated from the three live wires 100 respectively. The three live wires 100 and the neutral wire 200 are used to electrically connect with the external power source so as to transmit the electrical energy supplied by the external power source to the three-phase charging pile 520.

[0030] The combiner box in this application embodiment has a preset state and a working state. The preset state includes the combiner box in a factory-packaged state, or the combiner box not yet unsealed, or the combiner box not yet used, or the combiner box not electrically connected to an external power source. The working state includes the combiner box being electrically connected to an external power source in a working environment, or the combiner box being electrically connected to an external power source in a factory testing environment.

[0031] In the preset state of the combiner box, the conductive component 400 is installed on the circuit board 2, and the conductive component 400 is electrically short-circuited with the three live wires 100 respectively, so that the conductive component 400 can move together with the circuit board 2, so that the conductive component 400 does not need to be installed in the subsequent working environment, thus preventing the problem of incorrect or missing connection.

[0032] In the working state of the combiner box, the conductive component 400 is maintained in the preset installation position, that is, the conductive component 400 is electrically short-circuited with the three live wires 100 respectively, so that the three live wires 100 and the conductive component 400 together form one L-phase live wire 100. Then, the conductive component 400 and the neutral wire 200 are used to electrically connect with the external power supply, so that the combiner box is in single-phase power connection mode, and the power supplied by the external power supply is delivered to the single-phase charging pile 510. In other words, in the preset state of the combiner box, when the conductive component 400 and the neutral wire 200 are electrically connected to the external power supply, the combiner box can be directly assumed to be in single-phase power connection mode. Alternatively, in the working state of the combiner box, the conductive component 400 is separated from the three live wires 100 respectively, that is, the three live wires 100 are not electrically connected to each other. Then, the three live wires 100 and the neutral wire 200 are used to electrically connect to the external power supply, so that the combiner box is in a three-phase power connection mode, and the power supplied by the external power supply is delivered to the three-phase charging pile 520.

[0033] In this embodiment, when power needs to be supplied to the single-phase charging pile 510, in a preset state, the conductive component 400 is installed on the circuit board 2, and the conductive component 400 is electrically short-circuited with the three live wires 100 respectively. In the working state, the conductive component 400 and the neutral wire 200 are directly electrically connected to the external power supply to supply power to the single-phase charging pile 510. When power needs to be supplied to the three-phase charging pile 520, in a preset state, the conductive component 400 is installed on the circuit board 2. In the working state, the conductive component 400 is spaced apart from the three live wires 100, that is, the conductive component 400 is not electrically connected to the three live wires 100. Then, the three live wires 100 and the neutral wire 200 are directly electrically connected to the external power supply to supply power to the three-phase charging pile 520.

[0034] This embodiment of the application, by pre-installing the conductive component 400 on the circuit board 2 in a preset state of the combiner box, and by pre-installing the conductive component 400 in a suitable position, electrically short-circuits the three live wires 100, effectively preventing incorrect wiring problems when connecting the three live wires 100 later. Furthermore, the conductive component 400 is detachably installed on the circuit board 2, allowing the combiner box to switch between single-phase charging mode and three-phase charging mode by changing the installation state of the conductive component 400. The structure is simple and the operation is convenient.

[0035] In some embodiments, such as Figure 4 As shown, the circuit board 2 includes a circuit board 330, and includes three live wire interfaces 310 and one neutral wire interface 320 disposed on the circuit board 330. Each live wire interface 310 is electrically connected to a corresponding live wire 100, and the neutral wire interface 320 is electrically connected to the neutral wire 200. Figure 5As shown, in single-phase power connection mode, the conductive component 400 is electrically connected to the three live wire interfaces 310 to achieve an electrical short circuit of the three live wires 100, and the external power supply is electrically connected to the conductive component 400. In three-phase power connection mode, the external power supply is electrically connected to the three live wire interfaces 310 respectively. Optionally, when the conductive component 400 is separated from the live wire interfaces 310, the live wire interfaces 310 can be connected to the external power supply cable in a detachable manner such as plugging or snapping to achieve an electrical connection. Optionally, the neutral wire interface 320 can be connected to the external power supply cable in a detachable manner such as plugging or snapping to achieve an electrical connection. The above is only an illustrative description, and the installation method of the external power supply cable to the live wire interface 310 and the neutral wire interface 320 is not limited in this embodiment. The specific method can be selected according to actual needs.

[0036] In some embodiments, such as Figure 5 As shown, the conductive component 400 includes a shorting body 410. When the conductive component 400 is mounted on the circuit board 2, the shorting body 410 is stacked with the circuit board 330 in a direction perpendicular to the surface of the circuit substrate 330 and is electrically connected to the live wire interface 310. This facilitates the installation of the conductive component 400 and allows the conductive component 400 to be electrically connected to multiple live wire interfaces 310 simultaneously. It also eliminates the need to design the structure of the circuit board 2 specifically for the conductive component 400, and the structure is compact and occupies little space in the direction perpendicular to the surface of the circuit substrate 330.

[0037] In some embodiments, such as Figure 5 and Figure 6 As shown, in the installation state where the conductive component 400 is mounted on the circuit board 2, the shorting body 410 is located on the side of the live wire interface 310 away from the circuit board 330 along a direction perpendicular to the surface of the circuit board 330. The shorting body 410 is in a relatively open space, which facilitates moving the shorting body 410 away from or closer to the live wire interface 310. The shorting body 410 has at least one mounting hole 411, which extends along a direction perpendicular to the surface of the circuit board 330.

[0038] Optionally, such as Figure 6As shown, the shorting body 410 contacts and is electrically connected to at least a portion of the live wire interface 310. A limiting member 420 is provided within at least a portion of the mounting hole 411, and the shorting body 410 is detachably mounted to the circuit board 2 via the limiting member 420. That is, the shorting body 410 directly functions to provide electrical connection with the live wire interface 310, while the limiting member 420 functions to mount the shorting body 410 onto the circuit board 330. The circuit board 330 has a first mating hole corresponding to the mounting hole 411. The limiting member 420 can be a screw, in which case the first mating hole is a threaded hole. The limiting member 420 passes through the mounting hole 411 and extends into the first mating hole for threaded connection, thereby mounting the shorting body 410 onto the circuit board 330. Alternatively, the limiting member 420 can also be a pin, passing through the mounting hole 411 and inserting into the first mating hole, thereby mounting the shorting body 410 onto the circuit board 330. At this time, the limiting member 420 can be an insulating limiting member 420 with insulating properties, or the limiting member 420 can be a conductive limiting member 420 with conductive properties and is spaced apart from the live wire interface 310.

[0039] Optionally, such as Figure 7 As shown, the conductive component 400 includes at least one conductive part 430. The conductive part 430 is provided within at least a portion of the mounting hole 411. The shorting body 410 is detachably mounted to the live wire interface 310 via the conductive part 430 and is electrically connected to the live wire interface 310. That is, the conductive part 430 serves both to electrically connect the shorting body 410 to the live wire interface 310 and to mount the shorting body 410 onto the live wire interface 310. The live wire interface 310 has a second mating hole 312. If the conductive part 430 is a screw, then the second mating hole 312 is a threaded hole. A limiting member 420 passes through the mounting hole 411 and extends into the second mating hole 312 for threaded connection, thereby mounting the shorting body 410 onto the circuit board 2. Alternatively, the conductive member can be a pin, passing through the mounting hole 411 and inserting into the second mating hole 312, thereby mounting the shorting body 410 onto the circuit board 2. At this time, the second mating hole 312 can also be a hole for the fire wire interface 310 to be used for cable plugging in for external power supply.

[0040] Regarding the number of mounting holes 411 in the shorting body 410 and the provision of limiting members 420 or conductive parts 430 within the mounting holes 411, for example, the shorting body 410 has at least two mounting holes 411 along a first direction X perpendicular to the direction in which the three live wire interfaces 310 are arranged side by side. A portion of the mounting holes 411 are located on one side of the three live wire interfaces 310, and another portion are located on the other side. At least a portion of the mounting holes 411 is provided with a limiting member 420 to mount the conductive component 400 onto the circuit board 330. For example, the shorting body 410 has at least three mounting holes 411, each corresponding to one of the three live wire interfaces 310. Each of the three mounting holes 411 is provided with a conductive part 430 to mount the conductive component 400 onto the three live wire interfaces 310. For example, the shorting body 410 has multiple mounting holes 411, three of which are provided one-to-one with the three live wire interfaces 310 and are provided with conductive parts 430, and the other part of the mounting holes 411 are respectively provided on opposite sides of the three live wire interfaces 310 in the first direction X, and are provided with limiting members 420. The multiple conductive parts 430 and the multiple limiting members 420 work together to improve the installation stability of the conductive component 400.

[0041] In some embodiments, such as Figure 8 As shown, the conductive component 400 includes a first mounting portion 440 and a second mounting portion 450 connected to the shorting body 410. The first mounting portion 440 is rotatably mounted on the circuit board 2 (specifically, the circuit board 330). The second mounting portion 450 is mounted on the circuit board 2 by means of snap-fit, magnetic attraction, or screw fastening. The shorting body 410 directly contacts the live wire interface 310 to achieve electrical connection. When it is necessary to separate the conductive component 400 from the live wire interface 310, the restriction on the second mounting portion 450 is directly released, and the shorting body 410 is rotated around the part of the first mounting portion 440 that is connected to the circuit board 2 to separate the shorting body 410 from the live wire interface 310. With this mounting method, the conductive component 400 can maintain its connection with the circuit board 2 even when the shorting body 410 is separated from the live wire interface 310. During assembly, the first mounting part 440 is initially positioned on one side of the short-circuit main body 410, which facilitates operation and improves assembly efficiency when the second mounting part 450 is installed on the circuit board 2.

[0042] Optionally, along the first direction X, the first mounting part 440 is disposed on one side of the three live wire interfaces 310, and the second mounting part 450 is disposed on the other side of the three live wire interfaces 310. The first mounting part 440 is rotatably mounted on the circuit board 330 about a direction parallel to the three live wire interfaces 310 arranged side by side. When the first direction X is vertical, the first mounting part 440 can be located below the three live wire interfaces 310. After the shorting body 410 is separated from the three live wire interfaces 310, the shorting body 410 is rotated to the bottom of the three live wire interfaces 310 to prevent the shorting body 410 and the second mounting part 450 from interfering with the installation of the cables between the live wire interfaces 310 and the external power supply.

[0043] In some embodiments, the conductive component 400 may also be mounted to the live wire interface 310 by means of a hook connection, specifically, such as Figure 9 As shown, the live wire interface 310 and the circuit board 330 enclose a mounting space 311. The mounting space 311 extends through the live wire interface 310 in a direction parallel to the surface of the circuit board 330. The shorting body 410 is located on the side of the live wire interface 310 away from the circuit board 330. The conductive component 400 also includes three mounting parts 460 connected to the shorting body 410. Each mounting part 460 extends from the shorting body 410 to one of the mounting spaces 311 and is engaged between the live wire interface 310 and the circuit board 330 to mount the conductive component 400 to the live wire interface 310. The shorting body 410 and the live wire interface 310 are in contact to achieve an electrical connection. Optionally, the mounting space 311 extends through the live wire interface 310 along the first direction X, and the mounting part 460 extends into the mounting space 311 in a direction parallel to the first direction X. When the mounting part 460 moves in the opposite direction to the direction it extends into the mounting space 311, the mounting part 460 can be moved out of the mounting space 311, thereby allowing the shorting body 410 and the mounting part 460 to move relative to the live wire interface 310. Therefore, by using the mounting method, the conductive component 400 is easy to install and remove. Optionally, at least one mounting part 460 is integrally formed with the shorting body 410 to reduce the impedance between the mounting part 460 and the shorting body 410.

[0044] In some other embodiments, the three live wire interfaces 310 may not be arranged in a straight line, but may be arranged in other ways. For example, the three live wire interfaces 310 and one neutral wire interface 320 may be arranged in a matrix or in a circle. The conductive component 400 may also be installed on the circuit section and electrically connected to the live wire interface 310 in any of the above methods. It is only necessary to insulate the conductive component 400 from the neutral wire interface 320. The specific structure and installation method of the conductive component 400 will not be described here.

[0045] In some embodiments, the surface of the circuit board 330 includes an edge region 331, where both the live wire interface 310 and the neutral wire interface 320 are located. In a direction perpendicular to the surface of the circuit board 330, a portion of the shorting body 410 covers the three live wire interfaces 310, while another portion of the shorting body 410 is offset from the circuit board 330 and used for electrical connection with an external power source. That is, the portion of the shorting body 410 extending beyond the edge region 331 of the circuit board 330 is used for electrical connection with the cable of the external power source, facilitating installation and allowing the cable of the external power source to be installed outside the circuit board 2, preventing the cable from extending into the middle region of the circuit board 330 and complicating the routing. Optionally, the shorting body 410 has at least one mounting hole 412, where a portion of the cable of the external power source can be disposed for positioning, increasing or decreasing the connection stability of the cable.

[0046] In some embodiments, the circuit board 2 may also be provided with an insulating member 340. A portion of the insulating member 340 is disposed between two adjacent live wire interfaces 310 to prevent the two adjacent live wire interfaces 310 from being electrically short-circuited. A portion of the insulating member 340 is disposed between an adjacent live wire interface 310 and a neutral wire interface 320 to prevent the live wire interface 310 and the neutral wire interface 320 from being electrically short-circuited.

[0047] In some embodiments, the three live wire interfaces 310 are at the same height in the direction perpendicular to the surface of the circuit board 330, and the shorting body 410 is flat. The shorting body 410 has a simple structure and is easy to manufacture. Of course, in some other embodiments, the shorting body 410 may not be flat, and by designing the shape of the shorting body 410, the shape of the shorting body 410 can be adapted to the shape of the live wire interface 310, thereby improving the connection stability.

[0048] In some embodiments, the shorting body 410 is selected from structural components made of metal. Preferably, the shorting body 410 is selected from brass or copper to give it good conductivity. When the conductive component 400 further includes structural components such as a conductive part 430 and a connecting part 460 integrally formed with the shorting body 410, these structural components can be made of the same material as the shorting body 410.

[0049] In some embodiments, both the live wire interface 310 and the neutral wire interface 320 protrude from the surface of the circuit board 330, and the live wire 100 and the neutral wire 200 may be disposed inside the circuit board 330. Please refer to [further details]. Figure 2 and Figure 3Each live wire 100 includes a first main wire 110, and each neutral wire 200 includes a second main wire 210. One end of the first main wire 110 and one end of the second main wire 210 are respectively used to electrically connect to the three-phase charging pile 520. The other end of each first main wire 110 is electrically connected to a corresponding live wire interface 310, and the other end of the second main wire 210 is electrically connected to the neutral wire interface 320. In the three-phase power connection mode, the first main wires 110 of the three live wires 100 are electrically connected to the external power supply through the live wire interfaces 310, and the three live wire interfaces 310 are electrically disconnected from each other. In the single-phase power connection mode, the three live wire interfaces 310 are electrically short-circuited through the conductive component 400, and the first main wires 110 of the three live wires 100 are electrically connected to the external power supply through the conductive component 400.

[0050] In this embodiment, the first main line 110 and the second main line 210 are directly electrically connected to the three-phase charging pile 520. In some embodiments, one of the live wires 100 is further provided with a first adapter wire 140, which is directly electrically connected to the corresponding first main line 110. The first adapter wire 140 is connected to the portion of the first main line 110 located between the live wire interface 310 and the three-phase charging pile 520. The neutral wire 200 is further provided with a second adapter wire 240, which is directly electrically connected to the second main line 210. The second adapter wire 240 is connected to the portion of the second main line 210 located between the neutral wire interface 320 and the three-phase charging pile 520. The first adapter wire 140 and the second adapter wire 240 are respectively electrically connected to the single-phase charging pile 510, so that the single-phase charging pile 510 and the three-phase charging pile 520 are respectively connected to different portions of the live wire 100 and the neutral wire 200, thus achieving parallel connection.

[0051] In some embodiments, the combiner box includes a single-phase power connector and a three-phase power connector. Three first main lines 110 and two second main lines 210 are electrically connected to the three-phase power connector, respectively. A first adapter cable 140 and a second adapter cable 240 are electrically connected to the single-phase power connector, respectively. The single-phase power connector is used to connect with the cable of the single-phase charging pile 510 to achieve electrical connection. The three-phase power connector is used to connect with the cable of the three-phase charging pile to achieve electrical connection. By providing single-phase and three-phase power connectors, it is convenient for the combiner box to be electrically connected to the single-phase charging pile 510 and the three-phase charging pile, respectively.

[0052] Optionally, the three live wires 100 include R-phase live wire 101, S-phase live wire 102 and T-phase live wire 103. The T-phase live wire 103 also includes a first adapter wire 140. The first main line 110 of the T-phase live wire 103 is electrically connected to the single-phase charging pile 510 through the first adapter wire 140.

[0053] In some embodiments, the external power source includes the power grid 610. In single-phase power connection mode, the conductive component 400 is mounted on the circuit board 2 and electrically short-circuited with three live wire interfaces 310. The three live wire interfaces 310 are electrically connected to the power grid 610 through the conductive component 400, and the neutral wire interface 320 is directly electrically connected to the power grid 610 to transmit the electrical energy supplied by the power grid 610 to the single-phase charging pile 510. In three-phase power connection mode, the three live wire interfaces 310 and the neutral wire interface 320 are directly electrically connected to the power grid 610 to transmit the electrical energy supplied by the power grid 610 to the three-phase charging pile 520.

[0054] In some embodiments, the external power source may include a generator 620, and each live wire 100 may further include a first branch wire 120, one end of which is connected to the portion of the corresponding first main line 110 located between the three-phase charging pile 520 and the live wire interface 310. Specifically, the first branch wire 120 of the T-phase live wire 103 is connected to the portion of the first main line 110 located between the live wire interface 310 and the first adapter cable 140. The neutral wire 200 may further include a second branch wire 220, which is connected to the portion of the second main line 210 located between the three-phase charging pile 520 and the neutral wire interface 320. Specifically, the second branch wire 220 is connected to the portion of the second main line 210 located between the adapter cable and the neutral wire interface 320.

[0055] The first branch line 120 and the second branch line 220 are electrically connected to the power generation equipment 620. In single-phase power connection mode, the second branch line 220 of at least one live wire 100 is electrically short-circuited to the three first main lines 110 through the conductive component 400, that is, the power generation equipment 620 is transferred to the single-phase charging pile 510 through the conductive component 400. In three-phase power connection mode, the first branch line 120 of each live wire 100 is directly electrically connected to the first main line 110, and the three live wires 100 are electrically disconnected from each other, so that the power generation equipment 620 is directly transferred to the three-phase charging pile through the first main line 110.

[0056] In some embodiments, when the power sources electrically connected to the combiner box include the power grid 610 and the generator 620, in addition to transmitting the electrical energy supplied by the power grid 610 and the generator 620 to the single-phase charging pile 510 or the three-phase charging pile 520, the combiner box may also have a three-phase conduction mode and a single-phase conduction mode. In the three-phase conduction mode and the single-phase conduction mode, the power grid 610 and the generator 620 are electrically connected through the combiner box, thereby enabling the power grid 610 and the generator 620 to transmit electrical energy to each other. Furthermore, the combiner box can be selected to be in the three-phase conduction mode or the single-phase conduction mode according to the voltage requirements for transmitting electrical energy between the power grid 610 and the generator 620.

[0057] Optionally, in single-phase conduction mode, the three live wire interfaces 310 are electrically connected to the power grid 610 through the conductive component 400, and the neutral wire interface 320 is directly electrically connected to the power grid 610, so that the power grid 610 and the power generation equipment 620 can transmit electrical energy to each other; in three-phase conduction mode, the three live wire interfaces 310 and the neutral wire interface 320 are directly electrically connected to the power grid 610, so that the power grid 610 and the power generation equipment 620 can transmit electrical energy to each other.

[0058] In this embodiment of the application, the method by which the first branch line 120 of the live wire 100 and the second branch line 220 of the neutral wire 200 are electrically connected to the power generation equipment 620 is not limited in this embodiment. Any method that can achieve electrical connection in the art is applicable to this application. For example, the T-phase live wire 103 also includes two first sub-wires 130, both of which are electrically connected to the first branch line 120 of the T-phase live wire 103. The neutral wire 200 also includes four second sub-wires 230, which are electrically connected to the second branch line 220 respectively. Each first sub-wire 130 and one of the second sub-wires 230 are electrically connected to the same power generation equipment 620. The first branch 120 of the R-phase live wire 101 and one of the second sub-wires 230 are electrically connected to the same power generation equipment 620. The first branch 120 of the S-phase live wire 102 and one of the second sub-wires 230 are electrically connected to the same power generation equipment 620. In this way, a "three-phase four-wire" power connection is formed, so that the power generation equipment 620 can be electrically connected to the first branch 120 of the three live wires 100 and the second branch 220 of the neutral wire 200 respectively.

[0059] Please refer to the following: Figure 2 and Figure 3 The junction box may also include a relay 11, and two first sub-wires 130, four second sub-wires 230, a portion of the first branch 120 of the R-phase live wire 101, and a portion of the first branch 120 of the S-phase live wire 102 may all be housed within the relay 11.

[0060] The circuit board 2 may further include a protection module 12, which is disposed on the first main line 110 of the three live wires 100 and the second main line 210 of the neutral wire 200. Specifically, it is disposed on the portion of the first main line 110 located between the first branch line 120 and the three-phase charging pile 520, and on the portion of the second main line 210 located between the second branch line 220 and the three-phase charging pile 520. The protection module 12 is used to monitor and interrupt fault current caused by leakage. Optionally, the protection module 12 includes a Breaker circuit breaker and an RCD residual current device (RCD).

[0061] The circuit board 2 may also include a transformer module 13, which is disposed on the first main line 110 of the three live wires 100 and the second main line 210 of the neutral wire 200. The transformer module 13 is disposed on the portion of the first main line 110 located between the first branch line 120 and the protection module 12, and on the portion of the second main line 210 located between the second branch line 220 and the protection module 12. The transformer module 13 is used to perform voltage conversion so that the circuit containing the three live wires 100 and the neutral wire 200 can output the required voltage to meet the voltage requirements of the single-phase charging pile 510 and the three-phase charging pile 520.

[0062] The circuit board 2 may also include a main control module 10, a communication terminal 14, and a wireless communication module 15. The main control module 10 is electrically connected to the relay 11, the transformer module 13, the communication terminal 14, and the wireless communication module 15, respectively, to receive the working data collected by the relay 11 and the transformer module 13, and to wirelessly transmit the working data to external devices through the wireless communication module 15, or to wiredly transmit the working data to external devices through the communication terminal 14.

[0063] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they 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. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0064] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A junction box, characterized in that, include: The circuit board has three live wires and one neutral wire. The three live wires and the neutral wire can be used to electrically connect to a three-phase charging pile, and one of the live wires and the neutral wire can also be used to electrically connect to a single-phase charging pile. Conductive components are detachably mounted on the circuit board; The junction box has a preset state and a working state; In the preset state, the conductive component is installed on the circuit board, and the conductive component is electrically shorted to the three live wires respectively; In the operating state, the conductive component remains in the installation position of the preset state, and the conductive component and the neutral wire are respectively used to be electrically connected to an external power source, so that the combiner box is in single-phase power connection mode, so as to deliver the electrical energy supplied by the external power source to the single-phase charging pile; or, the conductive component is separated from the three live wires, and the three live wires and the neutral wire are respectively used to be electrically connected to an external power source, so as to put the combiner box in three-phase power connection mode, so as to deliver the electrical energy supplied by the external power source to the three-phase charging pile.

2. The combiner box according to claim 1, characterized in that, The circuit board includes a circuit board substrate, and includes three live wire interfaces and one neutral wire interface disposed on the circuit board substrate. Each live wire interface is electrically connected to a corresponding live wire, and the neutral wire interface is electrically connected to the neutral wire. The conductive component includes a shorting body, which is stacked on the circuit board along a direction perpendicular to the surface of the circuit board and is electrically connected to the live wire interface.

3. The combiner box according to claim 2, characterized in that, Along a direction perpendicular to the surface of the circuit board, the shorting body is located on the side of the live wire interface away from the circuit board, and the shorting body has at least one mounting hole; The shorting body contacts and is electrically connected to at least a portion of the live wire interface; at least a portion of the mounting holes are provided with limiting members; and the shorting body is detachably mounted to the circuit board via the limiting members; and / or, The conductive component includes at least one conductive part, and the conductive part is provided in at least part of the mounting hole. The shorting body is detachably installed on the live wire interface through the conductive part and is electrically connected to the live wire interface.

4. The combiner box according to claim 2, characterized in that, The conductive component includes a first mounting part and a second mounting part connected to the shorting body. The first mounting part is rotatably mounted on the circuit board, the second mounting part is mounted on the circuit board, and the shorting body directly contacts the live wire interface to achieve electrical connection.

5. The combiner box according to claim 2, characterized in that, The live wire interface and the circuit board form a mounting space, and the mounting space extends through the live wire interface in a direction parallel to the surface of the circuit board. The shorting body is located on the side of the live wire interface away from the circuit board. The conductive component also includes three hooking parts connected to the shorting body. Each hooking part extends from the shorting body to one of the hooking spaces and is snapped between the live wire interface and the circuit board to hook the conductive component to the live wire interface. The shorting body and the live wire interface are in contact to achieve electrical connection.

6. The combiner box according to claim 2, characterized in that, The surface of the circuit board includes an edge region, and both the live wire interface and the neutral wire interface are located in the edge region; In a direction perpendicular to the circuit board surface, one part of the shorting body covers the three live wire interfaces, and the other part of the shorting body is offset from the circuit board and is used for electrical connection with an external power supply.

7. The combiner box according to claim 2, characterized in that, The circuit board may also be equipped with insulating components; A portion of the insulating element is disposed between two adjacent live wire terminals; and / or, One portion of the insulating element is disposed between the adjacent live wire interface and the neutral wire interface.

8. The combiner box according to claim 1, characterized in that, Each of the live wires includes a first main wire, and the neutral wire includes a second main wire. One end of the first main wire and one end of the second main wire are respectively used to be electrically connected to the three-phase charging pile. The circuit board has three live wire interfaces and one neutral wire interface. The other end of each of the first main lines is electrically connected to a corresponding live wire interface, and the other end of the second main line is electrically connected to the neutral wire interface. In the single-phase power-on mode, the three live wire interfaces are electrically short-circuited through the conductive component and electrically connected to the external power supply. In the three-phase power-on mode, the three live wire interfaces are electrically connected to the external power supply respectively, and the three live wire interfaces are electrically disconnected from each other.

9. The combiner box according to claim 8, characterized in that, The three live wires include an R-phase live wire, an S-phase live wire, and a T-phase live wire. The T-phase live wire also includes a first adapter wire, and the neutral wire also includes a second adapter wire. The first main line of the T-phase live wire is electrically connected to the single-phase charging pile through the first adapter wire, and the second main line of the neutral wire is electrically connected to the single-phase charging pile through the second adapter wire.

10. The combiner box according to claim 8, characterized in that, The external power source includes the power grid; In the single-phase power connection mode, the three live wire interfaces are electrically connected to the power grid through the conductive components, and the neutral wire interface is directly electrically connected to the power grid. In the three-phase power connection mode, the three live wire interfaces and the neutral wire interface are directly electrically connected to the power grid.

11. The combiner box according to claim 8, characterized in that, The external power source includes a power generation device; Each of the live wires further includes a first branch wire, one end of which is connected to the portion of the corresponding first main wire located between the three-phase charging pile and the live wire interface; the neutral wire further includes a second branch wire, which is connected to the portion of the second main wire located between the three-phase charging pile and the neutral wire interface. The first branch line and the second branch line are electrically connected to the power generation equipment, respectively. In the single-phase power connection mode, at least one of the second branches of the live wire is electrically short-circuited to the three first main wires through the conductive component; In the three-phase power connection mode, the first branch of each of the live wires is directly electrically connected to the first main wire, and the three live wires are electrically disconnected from each other.

12. The combiner box according to claim 11, characterized in that, The external power source also includes the power grid, and the combiner box also has a three-phase conduction mode and a single-phase conduction mode; In the single-phase conduction mode, the three live wire interfaces are electrically connected to the power grid through the conductive components, and the neutral wire interface is directly electrically connected to the power grid, so that the power grid and the power generation equipment can transmit electrical energy to each other. In the three-phase conduction mode, the three live wire interfaces and the neutral wire interface are directly electrically connected to the power grid, so that the power grid and the power generation equipment can transmit electrical energy to each other.

13. The combiner box according to claim 11, characterized in that, The three live wires mentioned include the R-phase live wire, the S-phase live wire, and the T-phase live wire; The T-phase live wire also includes two first sub-wires, both of which are electrically connected to the first branch of the T-phase live wire. The neutral wire also includes four second sub-wires, which are electrically connected to the second branch respectively. Each of the first sub-wires and one of the second sub-wires is used to be electrically connected to the same power generation equipment. The first branch of the R-phase live wire and one of the second sub-wires are used to be electrically connected to the same power generation equipment. The first branch of the S-phase live wire and one of the second sub-wires are used to be electrically connected to the same power generation equipment.

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