Alternating current connection circuit of charging pile, circuit board and charging pile

Abstract

The utility model provides an alternating current connection circuit of a charging pile, a circuit board and the charging pile. The alternating current connection circuit comprises a first electrical connection unit, a second electrical connection unit, a third electrical connection unit, a fourth electrical connection unit, a fifth electrical connection unit, a sixth electrical connection unit, a leakage protection unit and a relay unit. According to the alternating current connection circuit provided by the invention, the first electrical connection unit, the second electrical connection unit, the third electrical connection unit, the fourth electrical connection unit, the fifth electrical connection unit and the sixth electrical connection unit are arranged; according to the system of the accessed power grid, the first electrical path and the second electrical path can be combined into one electrical path, and / or the third electrical path and the fourth electrical path can be combined into one electrical path, so that the alternating current connection circuit can be suitable for power grids of various systems; therefore, the charging pile provided with the alternating current connection circuit can be suitable for power grids of various systems.

Description

Technical Field

[0001] This application relates to the field of charging pile technology, and in particular to an AC connection circuit, circuit board and charging pile for a charging pile. Background Technology

[0002] Charging stations are core facilities for providing electricity to electric vehicles and are important infrastructure for promoting green travel and energy transition. With the popularization of new energy vehicles, charging stations have become an indispensable part of modern urban transportation networks and smart energy systems.

[0003] Current charging pile products are generally only applicable to one type of power grid and cannot be used simultaneously with different types of power grids. Utility Model Content

[0004] In view of this, this application provides an AC power connection circuit for a charging pile and a charging pile, which enables the charging pile to be applicable to various types of power grids.

[0005] This application provides an AC connection circuit for a charging pile, including a first electrical connection unit, a second electrical connection unit, a third electrical connection unit, a fourth electrical connection unit, a fifth electrical connection unit, a sixth electrical connection unit, a leakage current protection unit, and a relay unit. The leakage current protection unit includes a first input terminal, a second input terminal, a third input terminal, a fourth input terminal, a first output terminal, a second output terminal, a third output terminal, and a fourth output terminal. The first input terminal is connected to the second input terminal via the first electrical connection unit, the third input terminal is connected to the fourth input terminal via the second electrical connection unit, the first output terminal is connected to the second output terminal via the third electrical connection unit, and the third output terminal is connected to the fourth output terminal via the fourth electrical connection unit. The relay unit includes a fifth input terminal, a sixth input terminal, a seventh input terminal, an eighth input terminal, and a fifth output terminal. The system comprises a fifth input terminal, a sixth output terminal, a seventh output terminal, and an eighth output terminal; the fifth input terminal is connected to the first output terminal, the sixth input terminal is connected to the second output terminal, the seventh input terminal is connected to the third output terminal, and the eighth input terminal is connected to the fourth output terminal; the fifth output terminal is connected to the sixth output terminal via a fifth electrical connection unit, and the seventh output terminal is connected to the eighth output terminal via the sixth electrical connection unit; the first, second, third, fourth, fifth, and sixth electrical connection units are used to connect or disconnect the system according to the power grid system; the input terminal of the leakage current protection unit is used to connect to the power grid and output a leakage current protection signal when a leakage current fault is detected; the relay unit is used to disconnect the connection between its input terminal and its output terminal when it receives the leakage current protection signal.

[0006] In one embodiment of this application, the first electrical connection unit, the second electrical connection unit, the third electrical connection unit, the fourth electrical connection unit, the fifth electrical connection unit, and the sixth electrical connection unit are all configured to be connected when the charging pile is connected to the first type of power grid.

[0007] In one embodiment of this application, the first electrical connection unit, the second electrical connection unit, the third electrical connection unit, the fourth electrical connection unit, the fifth electrical connection unit, and the sixth electrical connection unit are all disconnected when the charging pile is connected to the second type of power grid.

[0008] In one embodiment of this application, the AC connection circuit further includes a first output terminal, a second output terminal, a third output terminal, a fourth output terminal, a seventh electrical connection unit, and an eighth electrical connection unit; the first output terminal is connected to the fifth output terminal, the second output terminal is connected to the sixth output terminal, the third output terminal is connected to the seventh output terminal, and the fourth output terminal is connected to the eighth output terminal; the first output terminal, the second output terminal, the third output terminal, and the fourth output terminal are used to connect to a lower-level circuit; the first output terminal is also connected to the second output terminal through the seventh electrical connection unit, and the third output terminal is also connected to the fourth output terminal through the eighth electrical connection unit; the seventh electrical connection unit and the eighth electrical connection unit are used to turn on or off according to the power grid system to which the charging pile is connected.

[0009] In one embodiment of this application, the first electrical connection unit includes a first electrical switch, the second electrical connection unit includes a second electrical switch, the third electrical connection unit includes a third electrical switch, the fourth electrical connection unit includes a fourth electrical switch, the fifth electrical connection unit includes a fifth electrical switch, and the sixth electrical connection unit includes a sixth electrical switch.

[0010] In one embodiment of this application, the AC connection circuit further includes a control unit, which is connected to the first electrical switch, the second electrical switch, the third electrical switch, the fourth electrical switch, the fifth electrical switch, and the sixth electrical switch; the control unit is used to control the first electrical switch, the second electrical switch, the third electrical switch, the fourth electrical switch, the fifth electrical switch, and the sixth electrical switch to be turned on or off according to the power grid standard.

[0011] A second aspect of this application provides a circuit board, comprising: a substrate, and an AC power connection circuit for the charging pile, wherein the AC power connection circuit for the charging pile is disposed on the substrate.

[0012] In one embodiment of this application, the substrate is provided with multiple connection terminals for connecting to the AC power connection circuit of the charging pile. At least one of the first electrical connection unit, the second electrical connection unit, the third electrical connection unit, the fourth electrical connection unit, the fifth electrical connection unit, and the sixth electrical connection unit is a conductive element. The conductive element can be selectively connected to or disconnected from two corresponding connection terminals among the multiple connection terminals to realize the conduction or disconnection of the electrical connection of the conductive element.

[0013] In one embodiment of this application, the connection end is a terminal and / or a solder joint; when the connection end is a terminal, both ends of the conductive element are respectively connected to the corresponding terminal; when the connection end is a solder joint, both ends of the conductive element are respectively soldered to the corresponding solder joint.

[0014] A third aspect of this application provides a charging pile, including the aforementioned circuit board. In summary, the AC connection circuit provided by this application forms a first electrical path when the relay unit is turned on via a first input terminal, a first output terminal, a fifth input terminal, and a fifth output terminal; a second electrical path via a second input terminal, a second output terminal, a sixth input terminal, and a sixth output terminal; a third electrical path via a third input terminal, a third output terminal, a seventh input terminal, and a sixth output terminal; and a fourth electrical path via a fourth input terminal, a fourth output terminal, an eighth input terminal, and an eighth output terminal. Furthermore, by providing a first electrical connection unit, a second electrical connection unit, a third electrical connection unit, a fourth electrical connection unit, a fifth electrical connection unit, and a sixth electrical connection unit, the first and second electrical paths can be merged into one electrical path, and / or the third and fourth electrical paths can be merged into one electrical path, depending on the grid system. This allows the AC connection circuit to be applicable to various grid systems, thereby enabling the charging pile equipped with the AC connection circuit to be suitable for various grid systems. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be considered as a limitation on the scope of protection of this application. In the various drawings, similar components are numbered similarly.

[0016] Figure 1 This is a schematic block diagram of an AC power connection circuit for a charging pile, provided as an embodiment of this application.

[0017] Figure 2 This is a schematic block diagram of an AC power connection circuit for a first-type power grid provided in an embodiment of this application.

[0018] Figure 3 This is a schematic block diagram of an AC power connection circuit for a second-mode power grid provided in an embodiment of this application.

[0019] Figure 4 A schematic block diagram of the AC power connection circuit of a second type of charging pile provided in an embodiment of this application.

[0020] Figure 5 A schematic block diagram of the AC power connection circuit of a third type of charging pile provided in this application embodiment.

[0021] Figure 6 This is a schematic block diagram of a circuit board provided in an embodiment of this application.

[0022] Figure 7 This is a front view of a circuit board provided in an embodiment of this application.

[0023] Figure 8 This is a schematic diagram of the back side of a circuit board provided in an embodiment of this application. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0025] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0027] Some embodiments will now be described with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0028] Charging stations are core facilities for providing electricity to electric vehicles and are important infrastructure for promoting green travel and energy transition. With the popularization of new energy vehicles, charging stations have become an indispensable part of modern urban transportation networks and smart energy systems.

[0029] Current charging pile products are generally only applicable to one type of power grid and cannot be used simultaneously with different types of power grids.

[0030] This application provides an AC power connection circuit for a charging pile and a charging pile, which enables the charging pile to be compatible with various types of power grids.

[0031] Please refer to Figure 1 , Figure 1 This is a schematic block diagram of an AC power connection circuit 100 for a charging pile provided in an embodiment of this application. The AC power connection circuit 100 includes a first electrical connection unit 110, a third electrical connection unit 130, a fourth electrical connection unit 140, a fifth electrical connection unit 150, a sixth electrical connection unit 160, a leakage current protection unit 170, and a relay unit 180.

[0032] In this embodiment, the leakage current protection unit 170 includes a first input terminal IN1, a second input terminal IN2, a third input terminal IN3, a fourth input terminal IN4, a first output terminal OUT1, a second output terminal OUT2, a third output terminal OUT3, and a fourth output terminal OUT4. The first input terminal IN1 is connected to the second input terminal IN2 through a first electrical connection unit 110, the third input terminal IN3 is connected to the fourth input terminal IN4 through a second electrical connection unit 120, the first output terminal OUT1 is connected to the second output terminal OUT2 through a third electrical connection unit 130, and the third output terminal OUT3 is connected to the fourth output terminal OUT4 through a fourth electrical connection unit 140.

[0033] The first input terminal IN1, the second input terminal IN2, the third input terminal IN3, and the fourth input terminal IN4 of the leakage current protection unit 170 are also used to connect to the power grid. For example, when the AC connection circuit 100 is connected to a three-phase four-wire power grid, the first input terminal IN1 can be connected to the neutral wire of the power grid, the second input terminal IN2 can be connected to the first live wire of the power grid, the third input terminal IN3 can be connected to the second live wire of the power grid, and the fourth input terminal IN4 can be connected to the third live wire of the power grid.

[0034] In another embodiment, for example, the AC connection circuit 100 can be connected to a three-phase five-wire power grid. In this case, the AC connection circuit 100 also includes a PE (Protective Earthing) connection terminal (not shown in the figure) for connecting the PE line of the power grid or the ground. The first input terminal IN1 can be connected to the neutral line of the power grid, the second input terminal IN2 is connected to the first live line of the power grid, the third input terminal IN3 is connected to the second live line of the power grid, and the fourth input terminal IN4 is connected to the third live line of the power grid.

[0035] The relay unit 180 includes a fifth input terminal IN5, a sixth input terminal IN6, a seventh input terminal IN7, an eighth input terminal IN8, a fifth output terminal OUT5, a sixth output terminal OUT6, a seventh output terminal OUT7, and an eighth output terminal OUT8. The fifth input terminal IN5 is connected to the first output terminal OUT1, the sixth input terminal IN6 is connected to the second output terminal OUT2, the seventh input terminal IN7 is connected to the third output terminal OUT3, and the eighth input terminal IN8 is connected to the fourth output terminal OUT4. The fifth output terminal OUT5 is connected to the sixth output terminal OUT6 via a fifth electrical connection unit 150, and the seventh output terminal OUT7 is connected to the eighth output terminal OUT8 via a sixth electrical connection unit 160.

[0036] It is understood that, in the embodiments of this application, the first input terminal IN1, the first output terminal OUT1, the fifth input terminal IN5, and the fifth output terminal OUT5 constitute a first electrical path when the relay unit 180 is turned on. The second input terminal IN2, the second output terminal OUT2, the sixth input terminal IN6, and the sixth output terminal OUT6 constitute a second electrical path when the relay unit 180 is turned on. The third input terminal IN3, the third output terminal OUT3, the seventh input terminal IN7, and the device output terminal constitute a third electrical path when the relay unit 180 is turned on. The fourth input terminal IN4, the fourth output terminal OUT4, the eighth input terminal IN8, and the eighth output terminal OUT8 constitute a fourth electrical path when the relay unit 180 is turned on.

[0037] The first electrical connection unit 110, the second electrical connection unit 120, the third electrical connection unit 130, the fourth electrical connection unit 140, the fifth electrical connection unit 150, and the sixth electrical connection unit 160 are used to connect or disconnect the power grid according to the grid's configuration.

[0038] It is understood that the embodiments of this application selectively connect the above-mentioned electrical connection units to merge the corresponding electrical paths, so as to be suitable for the corresponding power grid system. For example, by connecting the first electrical connection unit 110, the third electrical connection unit 130 and the fifth electrical connection unit 150, the first electrical path and the second electrical path can be merged into one electrical path. By connecting the second electrical connection unit 120, the fourth electrical connection unit 140 and the sixth electrical connection unit 160, the third electrical path and the fourth electrical path can be merged into one electrical path. Thus, the AC connection circuit 100 can be used for a three-wire power grid, such as a single-phase three-wire power grid or a two-phase three-wire power grid. In this case, the two electrical paths are used to connect the two live wires in the three-wire power grid, and the PE / neutral wire in the three-wire power grid can be connected to the PE terminal of the AC connection circuit 100.

[0039] The input terminal of the leakage current protection unit 170 is used to connect to the power grid and outputs a leakage current protection signal when a leakage current fault is detected. For example, when the input terminal of the leakage current protection unit 170 is connected to a three-phase four-wire power grid, the first electrical path can be used to connect to the neutral wire of the power grid, the second electrical path can be used to connect to the first live wire of the power grid, the third electrical path can be used to connect to the second live wire of the power grid, and the fourth electrical path can be used to connect to the third live wire of the power grid. The leakage current protection unit 170 can detect whether leakage current occurs between the second electrical path, the third electrical path, and the fourth electrical path and the ground, and output a leakage current protection signal when leakage current occurs.

[0040] In some embodiments, the leakage protection unit 170 includes a GFCI (Ground Fault Circuit Interrupter).

[0041] The relay unit 180 is used to disconnect its input and output terminals when it receives a leakage current protection signal. That is, after receiving the leakage current protection signal output by the leakage current protection unit 170, the relay unit 180 can disconnect the connection between the fifth input terminal IN5 and the fifth output terminal OUT5, the connection between the sixth input terminal IN6 and the sixth output terminal OUT6, the connection between the seventh input terminal IN7 and the seventh output terminal OUT7, and the connection between the eighth input terminal IN8 and the eighth output terminal OUT8.

[0042] It is understood that the AC connection circuit 100 of this application forms a first electrical path when the relay unit 180 is turned on through the first input terminal IN1, the first output terminal OUT1, the fifth input terminal IN5, and the fifth output terminal OUT5; forms a second electrical path when the relay unit 180 is turned on through the second input terminal IN2, the second output terminal OUT2, the sixth input terminal IN6, and the sixth output terminal OUT6; forms a third electrical path when the relay unit 180 is turned on through the third input terminal IN3, the third output terminal OUT3, the seventh input terminal IN7, and the device output terminal; and forms a third electrical path when the relay unit 180 is turned on through the fourth input terminal IN4, the fourth output terminal OUT4, the eighth input terminal IN8, and the device output terminal. When the relay unit 180 is turned on, the eighth output terminal OUT8 forms a fourth electrical path. Then, the first electrical connection unit 110, the second electrical connection unit 120, the third electrical connection unit 130, the fourth electrical connection unit 140, the fifth electrical connection unit 150, and the sixth electrical connection unit 160 are set up. Depending on the grid system, the first electrical path and the second electrical path can be merged into one electrical path, and / or the third electrical path and the fourth electrical path can be merged into one electrical path. Thus, the AC connection circuit 100 can be used for multiple grid systems, and the charging pile equipped with the AC connection circuit 100 can be used for multiple grid systems.

[0043] Please refer to Figure 2 , Figure 2 This is a schematic block diagram of an AC connection circuit 100 for a first-type power grid provided in an embodiment of this application. The first electrical connection unit 110, the second electrical connection unit 120, the third electrical connection unit 130, the fourth electrical connection unit 140, the fifth electrical connection unit 150, and the sixth electrical connection unit 160 are all connected when the first-type power grid is in operation.

[0044] In this embodiment, the first power grid can be a single-phase three-wire U.S. power grid. When all electrical connection units in the AC connection circuit 100 are turned on, two electrical paths can be provided, respectively connecting the first live wire and the second live wire in the single-phase three-wire U.S. power grid. Specifically, the voltage phase shift between the first live wire and the second live wire in the single-phase three-wire U.S. power grid is 180 degrees, and the voltage amplitude is 120 volts.

[0045] Please refer to Figure 3 , Figure 3 This is a schematic block diagram of an AC connection circuit 100 for a second-mode power grid provided in an embodiment of this application. The first electrical connection unit 110, the second electrical connection unit 120, the third electrical connection unit 130, the fourth electrical connection unit 140, the fifth electrical connection unit 150, and the sixth electrical connection unit 160 are all disconnected in the second-mode power grid configuration.

[0046] In this embodiment, the second type of power grid can be a three-phase four-wire European power grid. When all electrical connection units in the AC connection circuit 100 are disconnected, a first electrical path, a second electrical path, a third electrical path, and a fourth electrical path are provided, which can be connected to the neutral wire, the first live wire, the second live wire, and the third live wire in the European power grid, respectively.

[0047] Among them, such as Figures 2 to 3 As shown in the schematic block diagram of the AC connection circuit 100, the electrical connection unit includes a first connection terminal 101 and a second connection terminal 102. The first connection terminal 101 is used to connect to the second connection terminal 102 via a conductive element 103 to enable the electrical connection unit to conduct. That is, the circuit board of the AC connection circuit 100 may have mounting positions for the conductive element 103 formed by the first connection terminal 101 and the second connection terminal 102, allowing the user to selectively install the conductive element 103 according to the power grid system. In some embodiments, the conductive element 103 can be installed by soldering or by fixing with screws, wherein the conductive element 103 includes a copper busbar, which is not limited here.

[0048] In some embodiments, the relay unit 180 can be replaced according to the power grid system to which the charging pile is connected. For example, when connected to a single-phase three-wire or two-phase three-wire power grid, a two-pole relay can be selected as the relay unit 180, or two single-pole relays can be selected to form the relay unit 180. When connected to a three-phase four-wire power grid, a four-pole relay can be selected as the relay unit 180, or two double-pole relays can be selected to form the relay unit 180.

[0049] Please refer to Figure 4 , Figure 4 This is a schematic block diagram of an AC power connection circuit 100 for another charging pile provided in an embodiment of this application. Wherein, Figure 5 The AC connection circuit 100 shown is connected to Figure 1 Compared to the AC connection circuit 100 shown, the difference is that the first electrical connection unit 110 includes a first electrical switch 111, the second electrical connection unit 120 includes a second electrical switch 121, the third electrical connection unit 130 includes a third electrical switch 131, the fourth electrical connection unit 140 includes a fourth electrical switch 141, the fifth electrical connection unit 150 includes a fifth electrical switch 151, and the sixth electrical connection unit 160 includes a sixth electrical switch 161.

[0050] The AC connection circuit 100 also includes a control unit 190, which is connected to a first electrical switch 111, a second electrical switch 121, a third electrical switch 131, a fourth electrical switch 141, a fifth electrical switch 151, and a sixth electrical switch 161. The control unit 190 is used to control the first electrical switch 111, the second electrical switch 121, the third electrical switch 131, the fourth electrical switch 141, the fifth electrical switch 151, and the sixth electrical switch 161 to be turned on or off according to the power grid system.

[0051] For example, in the first type of power grid, the control unit 190 can control all of the following electrical switches to be turned on: the first electrical switch 111, the second electrical switch 121, the third electrical switch 131, the fourth electrical switch 141, the fifth electrical switch 151, and the sixth electrical switch 161. In the second type of power grid, the control unit 190 can control all of the following electrical switches to be turned off: the first electrical switch 111, the second electrical switch 121, the third electrical switch 131, the fourth electrical switch 141, the fifth electrical switch 151, and the sixth electrical switch 161.

[0052] Please refer to Figure 5 , Figure 5 This is a schematic block diagram of the AC power connection circuit 100 of the fourth type of charging pile provided in this application embodiment. Wherein, Figure 6 The AC connection circuit 100 shown is connected to Figure 1Compared to the AC connection circuit 100 shown, the AC connection circuit 100 further includes a first output terminal OUT9, a second output terminal OUT10, a third output terminal OUT11, a fourth output terminal OUT12, a seventh electrical connection unit 1100, and an eighth electrical connection unit 1110.

[0053] In this embodiment, the first output terminal OUT9 is connected to the fifth output terminal OUT5, the second output terminal OUT10 is connected to the sixth output terminal OUT6, the third output terminal OUT11 is connected to the seventh output terminal OUT7, and the fourth output terminal OUT12 is connected to the eighth output terminal OUT8. The first output terminal OUT9, the second output terminal OUT10, the third output terminal OUT11, and the fourth output terminal OUT12 are used to connect to the next-level circuit. The first output terminal OUT9 is also connected to the second output terminal OUT10 via the seventh electrical connection unit 1100, and the third output terminal OUT11 is also connected to the fourth output terminal OUT12 via the eighth electrical connection unit 1110.

[0054] The seventh electrical connection unit 1100 and the eighth electrical connection unit 1110 are used to turn on or off according to the power grid system. For example, the seventh electrical connection unit 1100 and the eighth electrical connection unit 1110 are used to turn on completely in the first power grid system, and the seventh electrical connection unit 1100 and the eighth electrical connection unit 1110 are used to turn off completely in the second power grid system.

[0055] It is understood that by providing a seventh electrical connection unit 1100 and an eighth electrical connection unit 1110 on the output terminals of the AC connection circuit 100, the current carrying capacity of the merged electrical paths can be increased when merging electrical paths.

[0056] Please refer to Figure 6 and Figure 7 , Figure 6 This is a schematic block diagram of a circuit board provided in an embodiment of this application. The circuit board 10 includes a substrate 11 and an AC power connection circuit 100 for a charging pile in any of the above embodiments. The AC power connection circuit 100 is disposed on the substrate 11. Exemplarily, the AC power connection circuit 100 is disposed on the substrate 11 by an etching process and device mounting.

[0057] In this embodiment, the substrate 11 is provided with multiple connection terminals 12-23 for the AC power connection circuit 100 connected to the charging pile. At least one of the first electrical connection unit 110, the second electrical connection unit 120, the third electrical connection unit 130, the fourth electrical connection unit 140, the fifth electrical connection unit 150, and the sixth electrical connection unit 160 is a conductive element. The conductive element can be selectively connected to or disconnected from two corresponding connection terminals among the multiple connection terminals to realize the conduction or disconnection of the electrical connection of the conductive element. The conductive element includes a copper busbar.

[0058] Among them, such as Figure 6 As shown, in substrate 11, the first input terminal IN1, connection terminal 12, first output terminal OUT1, connection terminal 13, fifth input terminal IN5, fifth output terminal OUT5, and connection terminal 14 are electrically connected; the second input terminal IN2, connection terminal 15, second output terminal OUT2, connection terminal 16, sixth input terminal IN6, sixth output terminal OUT6, and connection terminal 17 are electrically connected; the third input terminal IN3, connection terminal 18, third output terminal OUT3, connection terminal 19, seventh input terminal IN7, seventh output terminal OUT7, and connection terminal 20 are electrically connected; and the fourth input terminal IN4, connection terminal 21, fourth output terminal OUT4, connection terminal 22, eighth input terminal IN8, eighth output terminal OUT8, and connection terminal 23 are electrically connected.

[0059] In some embodiments, combined with Figure 6 and Figure 7As shown, some or all of the connection terminals provided on the substrate 11 can be terminals. When the connection terminal is a terminal (2401, 2402, 2403, 2404, 2405, 2406, 2407, 2408), the two ends of the conductive element 26 are respectively connected to the corresponding terminals (2401, 2402, 2403, 2404, 2405, 2406, 2407, 2408). The connection of the conductive element 26 to the corresponding terminals (2401, 2402, 2403, 2404, 2405, 2406, 2407, 2408) refers to selecting the terminals (2401, 2402, 2403, 2404, 2405, 2406, 2407, 2408) according to the power grid system. For example, terminal 2401 is connected to the first input terminal IN1 of the AC connection circuit 100 of the charging pile, and terminal 2402 is connected to the second input terminal IN2 of the AC connection circuit 100 of the charging pile. Conductive element 26 connects terminals 2401 and 2402, that is, connects the first input terminal IN1 and the second input terminal IN2. Terminal 2403 is connected to the third input terminal IN3 of the AC connection circuit 100 of the charging pile, and terminal 2404 is connected to the fourth input terminal IN4 of the AC connection circuit 100 of the charging pile. Conductive element 26 connects terminals 2403 and 2404, that is, connects the third input terminal IN3 and the second input terminal IN4. Terminal 2405 is connected to the fifth output terminal OUT5 of the AC connection circuit 100 of the charging pile, and terminal 2406 is connected to the sixth output terminal OUT6 of the AC connection circuit 100 of the charging pile. Conductive element 26 connects terminals 2405 and 2406, that is, connects the fifth output terminal OUT5 and the sixth output terminal OUT6. Terminal 2407 is connected to the seventh output terminal OUT7 of the AC power connection circuit 100 of the charging pile, and terminal 2408 is connected to the eighth output terminal OUT8 of the AC power connection circuit 100 of the charging pile. Conductive component 26 connects terminals 2407 and 2408, that is, it connects the seventh output terminal OUT7 and the eighth output terminal OUT8. The conductive component 26 can be connected to the corresponding terminal by means of screws.

[0060] In some embodiments, combined with Figure 6 and Figure 8 As shown, some or all of the connection terminals provided on the substrate 11 may also be solder joints. For example... Figure 8In the circuit board 10 shown, the aforementioned solder joints (2501, 2502, 2503, 2504) can be provided on the back side of the substrate 11. The two ends of the conductive element 26 are respectively soldered to the corresponding solder joints (2501, 2502, 2503, 2504). The connection of the conductive element 26 to the corresponding terminals (2501, 2502, 2503, 2504) refers to selecting the terminals (2501, 2502, 2503, 2504) according to the power grid standard. For example, terminal 2501 is connected to the first output terminal OUT1 of the AC connection circuit 100 of the charging pile, and terminal 2502 is connected to the second output terminal OUT2 of the AC connection circuit 100 of the charging pile. The conductive element 26 is soldered to terminals 2501 and 2502, thus connecting the first output terminal OUT1 and the second output terminal OUT2. Terminal 2503 is connected to the third output terminal OUT3 of the AC power connection circuit 100 of the charging pile, and terminal 2504 is connected to the fourth output terminal OUT4 of the AC power connection circuit 100 of the charging pile. The conductive component 26 is welded to terminals 2503 and 2504, that is, connecting the third output terminal OUT3 and the fourth output terminal OUT4.

[0061] This application also provides a charging pile, including the circuit board 10 of any of the above embodiments. It is understood that the beneficial effects achieved by the charging pile and the circuit board 10 can be referred to the beneficial effects of the AC connection circuit 100 in the foregoing embodiments, and will not be repeated here.

[0062] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An alternating current connection circuit of a charging station, characterized in that, It includes a first electrical connection unit, a second electrical connection unit, a third electrical connection unit, a fourth electrical connection unit, a fifth electrical connection unit, a sixth electrical connection unit, a leakage current protection unit, and a relay unit; The leakage current protection unit includes a first input terminal, a second input terminal, a third input terminal, a fourth input terminal, a first output terminal, a second output terminal, a third output terminal, and a fourth output terminal; the first input terminal is connected to the second input terminal through the first electrical connection unit, the third input terminal is connected to the fourth input terminal through the second electrical connection unit, the first output terminal is connected to the second output terminal through the third electrical connection unit, and the third output terminal is connected to the fourth output terminal through the fourth electrical connection unit; The relay unit includes a fifth input terminal, a sixth input terminal, a seventh input terminal, an eighth input terminal, a fifth output terminal, a sixth output terminal, a seventh output terminal, and an eighth output terminal; the fifth input terminal is connected to the first output terminal, the sixth input terminal is connected to the second output terminal, the seventh input terminal is connected to the third output terminal, and the eighth input terminal is connected to the fourth output terminal; the fifth output terminal is connected to the sixth output terminal through a fifth electrical connection unit, and the seventh output terminal is connected to the eighth output terminal through the sixth electrical connection unit; The first electrical connection unit, the second electrical connection unit, the third electrical connection unit, the fourth electrical connection unit, the fifth electrical connection unit, and the sixth electrical connection unit are used to connect or disconnect according to the power grid system. The input terminal of the leakage protection unit is used to connect to the power grid, and outputs a leakage protection signal when a leakage fault is detected. The relay unit is used to disconnect its input and output terminals when it receives the leakage protection signal.

2. The AC connection circuit according to claim 1, characterized in that, The first electrical connection unit, the second electrical connection unit, the third electrical connection unit, the fourth electrical connection unit, the fifth electrical connection unit, and the sixth electrical connection unit are all connected when the charging pile is connected to the first type of power grid.

3. The AC connection circuit according to claim 1, characterized in that, The first electrical connection unit, the second electrical connection unit, the third electrical connection unit, the fourth electrical connection unit, the fifth electrical connection unit, and the sixth electrical connection unit are all disconnected when the charging pile is connected to the second type of power grid.

4. The AC connection circuit according to claim 1, characterized in that, The AC connection circuit further includes a first output terminal, a second output terminal, a third output terminal, a fourth output terminal, a seventh electrical connection unit, and an eighth electrical connection unit; The first output terminal is connected to the fifth output terminal, the second output terminal is connected to the sixth output terminal, the third output terminal is connected to the seventh output terminal, and the fourth output terminal is connected to the eighth output terminal; The first output terminal, the second output terminal, the third output terminal, and the fourth output terminal are used to connect to the next-level circuit. The first output terminal is also connected to the second output terminal via the seventh electrical connection unit, and the third output terminal is also connected to the fourth output terminal via the eighth electrical connection unit; The seventh electrical connection unit and the eighth electrical connection unit are used to connect or disconnect according to the power grid system to which the charging pile is connected.

5. The AC connection circuit according to any one of claims 1 to 4, characterized in that, The first electrical connection unit includes a first electrical switch, the second electrical connection unit includes a second electrical switch, the third electrical connection unit includes a third electrical switch, the fourth electrical connection unit includes a fourth electrical switch, the fifth electrical connection unit includes a fifth electrical switch, and the sixth electrical connection unit includes a sixth electrical switch.

6. The AC connection circuit according to claim 5, characterized in that, It also includes a control unit, which is connected to the first electrical switch, the second electrical switch, the third electrical switch, the fourth electrical switch, the fifth electrical switch and the sixth electrical switch; The control unit is used to control the first electrical switch, the second electrical switch, the third electrical switch, the fourth electrical switch, the fifth electrical switch and the sixth electrical switch to be turned on or off according to the power grid system.

7. A circuit board, characterized in that, include: substrate; And the AC power connection circuit of the charging pile according to any one of claims 1 to 4, wherein the AC power connection circuit of the charging pile is disposed on the substrate.

8. The circuit board according to claim 7, characterized in that, The substrate is provided with multiple connection terminals for connecting to the AC power connection circuit of the charging pile. At least one of the first electrical connection unit, the second electrical connection unit, the third electrical connection unit, the fourth electrical connection unit, the fifth electrical connection unit, and the sixth electrical connection unit is a conductive element. The conductive element can be selectively connected to or disconnected from two corresponding connection terminals among the multiple connection terminals to realize the conduction or disconnection of the electrical connection of the conductive element.

9. The circuit board according to claim 8, characterized in that, The connection end is a terminal and / or a solder joint; When the connection end is the terminal, both ends of the conductive element are respectively connected to the corresponding terminal; When the connection end is the solder joint, both ends of the conductive element are respectively soldered to the corresponding solder joint.

10. A charging pile, characterized in that, The circuit board includes any one of claims 7 to 9.

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