Power supply control circuit, method, system and charging pile

Abstract

The application discloses a power supply control circuit, method, system and charging pile. The power supply control circuit comprises an input end connected with a five-way power supply input end of a switch control network and an output end connected with a five-way power supply output end; a main control circuit connected with the switch control network, used for acquiring a power supply control request and load power supply information, controlling the switch control network to conduct at least part of the five-way power supply input end and the five-way power supply output end according to the power supply control request and the load power supply information, so as to enter a three-phase power supply mode or a single-phase balanced power supply mode, thereby realizing switching of the three-phase power supply mode or the single-phase balanced power supply mode and single-phase load balanced power supply through switching of different conduction modes between the five-way power supply input end and the five-way power supply output end, and improving power supply flexibility to adapt to complex power consumption requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy, and in particular to a power supply control circuit, method, system and charging pile. BACKGROUND

[0002] At present, power distribution mainly relies on TN-S (three-phase five-wire system), IT (neutral point not grounded), TNC (three-phase four-wire system) and other standard architectures, and each system operates independently and cannot be dynamically switched. For example, the TN-S system has high safety but high cost, the IT system has strong power supply continuity but is not suitable for large-capacity unbalanced load, and the TNC system has simple structure but has safety hazards. The existing technology usually adopts mechanical switches or static protection strategies, lacks intelligent optimization of load characteristics, three-phase balance and energy efficiency, and leads to insufficient flexibility of the system, which is difficult to adapt to complex power demand. SUMMARY

[0003] The embodiments of the present application provide a power supply control circuit, method, system and charging pile to solve the problem of insufficient flexibility of the existing power supply system and difficulty in adapting to complex power demand.

[0004] A power supply control circuit, comprising a five-way power supply input end, a five-way power supply output end, a switch control network and a main control circuit;

[0005] The input end of the switch control network is connected with the five-way power supply input end, and the output end of the switch control network is connected with the five-way power supply output end; the five-way power supply input end comprises a first phase line input end, a second phase line input end, a third phase line input end, a neutral line input end and a protective ground line input end; the five-way power supply output end comprises a third phase line output end, a second phase line output end, a first phase line output end, a neutral line output end and a protective ground line output end;

[0006] The main control circuit is connected with the switch control network, used for acquiring a power supply control request and load power supply information, and controlling the switch control network to conduct at least part of the five-way power supply input end and the five-way power supply output end according to the power supply control request and the load power supply information, so as to enter a three-phase power supply mode or a single-phase balanced power supply mode.

[0007] Further, the switch control network comprises a first switch control circuit, a second switch control circuit, a third switch control circuit and a fourth switch control circuit;

[0008] The input end of the first switch control circuit is connected with the first phase line input end and the second phase line input end, and the output end of the first switch control circuit is connected with the third phase line output end and the second phase line output end;

[0009] The input end of the second switch control circuit is connected with the first phase line input end, the second phase line input end and the third phase line input end, and the output end of the second switch control circuit is connected with the first phase line output end;

[0010] The input end of the third switch control circuit is connected with the second phase line input end and the neutral line input end, and the output end of the third switch control circuit is connected with the neutral line output end;

[0011] The input end of the fourth switch control circuit is connected with the protective ground line input end, and the output end of the fourth switch control circuit is connected with the protective ground line output end;

[0012] The main control circuit is connected with the control end of the first switch control circuit, the control end of the second switch control circuit, the control end of the third switch control circuit and the control end of the fourth switch control circuit respectively.

[0013] Further, the first switch control circuit comprises a first switch circuit and a second switch circuit;

[0014] The first end of the first switch circuit is connected with the first phase line input end, and the second end of the first switch circuit is connected with the third phase line output end;

[0015] The first end of the second switch circuit is connected with the second phase line input end, and the second end of the second switch circuit is connected with the second phase line output end;

[0016] The main control circuit is connected with the control end of the first switch circuit and the control end of the second switch circuit respectively.

[0017] Further, the second switch control circuit comprises a third switch circuit, a fourth switch circuit and a fifth switch circuit;

[0018] The first end of the third switch circuit is connected with the first phase line input end, and the second end of the third switch circuit is connected with the first phase line output end;

[0019] The first end of the fourth switch circuit is connected with the second phase line input end, and the second end of the fourth switch circuit is connected with the first phase line output end;

[0020] The first end of the fifth switch circuit is connected with the third phase line input end, and the second end of the fifth switch circuit is connected with the first phase line output end;

[0021] The main control circuit is connected with the control end of the third switch circuit, the control end of the fourth switch circuit and the control end of the fifth switch circuit respectively.

[0022] Further, the third switch control circuit comprises a sixth switch circuit and a seventh switch circuit;

[0023] The first end of the sixth switch circuit is connected with the second phase line input end, and the second end of the sixth switch circuit is connected with the neutral line output end;

[0024] The first end of the seventh switch circuit is connected with the neutral line input end, and the second end of the seventh switch circuit is connected with the neutral line output end;

[0025] The control end of the sixth switch circuit and the control end of the seventh switch circuit are connected with the main control circuit respectively.

[0026] Further, the third switch control circuit comprises an eighth switch circuit;

[0027] The first end of the eighth switch circuit is connected with the protective ground line input end, the second end of the eighth switch circuit is connected with the protective ground line output end, and the control end of the eighth switch circuit is connected with the main control circuit.

[0028] A power supply control method applied in the main control circuit of the power supply control circuit, comprising:

[0029] Obtaining a power supply control request and load power supply information;

[0030] If the power supply control request is a first control request, controlling the switch control network to turn on the first phase line input end and the third phase line output end, turn on the second phase line input end and the second phase line output end, turn on the third phase line input end and the first phase line output end, turn on the neutral line input end and the neutral line output end, and turn on the protective ground line input end and the protective ground line output end;

[0031] If the power supply control request is a second control request, controlling the switch control network to turn on the first phase line input end and the third phase line output end, turn on the second phase line input end and the second phase line output end, turn on the third phase line input end and the first phase line output end, turn off the neutral line input end and the neutral line output end, and turn off the protective ground line input end and the protective ground line output end;

[0032] If the power supply control request is the third control request, the switch control network is controlled to disconnect the first phase line input end and the third phase line output end, disconnect the second phase line input end and the second phase line output end, turn on the neutral line input end and the neutral line output end, and turn on the protective ground line input end and the protective ground line output end, and according to the load power supply information, one of the first phase line input end, the second phase line input end and the third phase line input end is selected to be connected to the first phase line output end.

[0033] If the power supply control request is the fourth control request, the switch control network is controlled to disconnect the first phase line input end and the third phase line output end, disconnect the second phase line input end and the second phase line output end, disconnect the neutral line input end and the neutral line output end, disconnect the protective ground line input end and the protective ground line output end, turn on the second phase line input end and the neutral line output end, and according to the load power supply information, one of the first phase line input end and the third phase line input end is selected to be connected to the first phase line output end.

[0034] A power supply control system comprising a signal acquisition module and the power supply control circuit described above; the signal acquisition module is connected to the power supply control circuit and is used to connect five power supply input ends and acquire load power supply information.

[0035] Further, the signal acquisition module comprises a current transformer and a voltage transformer connected to the input phase line.

[0036] A charging pile comprising the power supply control system described above.

[0037] Embodiments of the present application provide a power supply control circuit, method, system and charging pile. The power supply control circuit comprises five power supply input ends, five power supply output ends, a switch control network and a master control circuit. The input end of the switch control network is connected to the five power supply input ends, and the output end of the switch control network is connected to the five power supply output ends. The five power supply input ends comprise a first phase line input end, a second phase line input end, a third phase line input end, a neutral line input end and a protective ground line input end. The five power supply output ends comprise a third phase line output end, a second phase line output end, a first phase line output end, a neutral line output end and a protective ground line output end. The master control circuit is connected to the switch control network and is used to acquire a power supply control request and load power supply information. According to the power supply control request and the load power supply information, the switch control network is controlled to turn on at least part of the five power supply input ends and the five power supply output ends, so as to enter a three-phase power supply mode or a single-phase balanced power supply mode. Through switching different turn-on modes between the five power supply input ends and the five power supply output ends, the three-phase power supply mode or the single-phase balanced power supply mode is switched, and single-phase load balanced power supply is realized. The power supply flexibility is improved to adapt to complex power consumption requirements. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings in the following description only represent some embodiments of the present application, and all other drawings obtained by those skilled in the art without any creative effort based on these drawings also belong to the protection scope of the present application.

[0039] Figure 1 is a schematic diagram of a power supply control circuit in an embodiment of the present application;

[0040] Figure 2 is another schematic diagram of a power supply control circuit in an embodiment of the present application;

[0041] Figure 3 is a flow chart of a power supply control method in an embodiment of the present application.

[0042] In the figure: 1, five-way power supply input end, 2, five-way power supply output end; 3, switch control network; 31, first switch control circuit; 311, first switch circuit; 312, second switch circuit; 32, second switch control circuit; 321, third switch circuit; 322, fourth switch circuit; 323, fifth switch circuit; 33, third switch control circuit; 331, sixth switch circuit; 332, seventh switch circuit; 34, fourth switch control circuit; 341, eighth switch circuit; 4, main control circuit; 5, signal acquisition module. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present application.

[0044] It should be understood that the present application can be implemented in different forms and should not be interpreted as being limited to the embodiments presented herein. On the contrary, these embodiments are provided to make the disclosure complete and full and to fully convey the scope of the present application to those skilled in the art. In the drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity throughout the same reference numerals represent the same elements.

[0045] It will be understood that when an element or layer is referred to as being "on" or "connected to" another element or layer, it can be directly on or connected to the other element or layer or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element or layer, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application.

[0046] Spatially relative terms, such as "beneath", "below", "lower", "under", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0047] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0048] For a thorough understanding of the present application, reference should be made to the following detailed description taken in conjunction with the accompanying drawings, in which:

[0049] The embodiment provides a power supply control circuit, which is applied to a charging pile.

[0050] Exemplarily, the charging pile is applied to a household power supply system. The household power supply system comprises a distribution box, the charging pile and household loads. The distribution box is connected with a power grid, the charging pile and the household loads, and is used for taking power from the power grid and supplying power to the charging pile and the household loads. It can be understood that the power grid comprises a first phase line, a second phase line, a third phase line, a neutral line and a protective ground line.

[0051] Exemplarily, the power supply system in the charging pile comprises a signal acquisition module 5 and the power supply control circuit; the signal acquisition module 5 is connected with the power supply control circuit and is used for connecting the five-way power supply input end 1 and acquiring load power supply information. Specifically, the signal acquisition module 5 comprises a current transformer and a voltage transformer connected with the input phase line. The first phase line, the second phase line and the third phase line connected with the five-way power supply input end 1 are each not provided with a current transformer and a voltage transformer, so as to acquire the current and the voltage of each phase line, and to determine the current carrying capacity of each phase line, so as to facilitate the load balancing of the power supply control circuit.

[0052] The embodiment provides a power supply control circuit, which is applied to a charging pile. Figure 1 and Figure 2 As shown in the figures, the power supply control circuit comprises a five-way power supply input end 1, a five-way power supply output end 2, a switch control network 3 and a main control circuit 4; the input end of the switch control network 3 is connected with the five-way power supply input end 1, and the output end of the switch control network 3 is connected with the five-way power supply output end 2; the five-way power supply input end 1 comprises a first phase line input end, a second phase line input end, a third phase line input end, a neutral line input end and a protective ground line input end; the five-way power supply output end 2 comprises a third phase line output end, a second phase line output end, a first phase line output end, a neutral line output end and a protective ground line output end; the main control circuit 4 is connected with the switch control network 3, is used for acquiring a power supply control request and load power supply information, and controls the switch control network 3 to conduct at least part of the five-way power supply input end 1 and the five-way power supply output end 2 according to the power supply control request and the load power supply information, so as to enter a three-phase power supply mode or a single-phase balanced power supply mode.

[0053] Exemplarily, the five-way power supply output end 2 comprises a first phase line input end, a second phase line input end, a third phase line input end, a neutral line input end and a protective ground line input end, and is used for connecting the first phase line, the second phase line, the third phase line, the neutral line and the protective ground line of the power grid. The five-way power supply output end 2 comprises a third phase line output end, a second phase line output end, a first phase line output end, a neutral line output end and a protective ground line output end, and is used for connecting a load device. Exemplarily, the load device can be a three-phase load device or a single-phase load device, for example, a three-phase charging gun or a single-phase charging gun used for connecting an electric vehicle.

[0054] As an example, the power supply control request refers to a power supply mode selection request. The user configures the power supply control request through the human-computer interaction terminal, and the human-computer interaction terminal sends the power supply control request to the master control circuit 4, so as to switch the power supply mode selection. The load power supply information refers to the power supply information obtained from the five-way power supply input end 1 when the power supply control circuit is loaded. The power supply information includes the power supply voltage and the power supply current. Understandably, the power supply information includes the power supply voltage and the power supply current corresponding to each phase line.

[0055] As an example, the three-phase power supply mode includes a three-phase five-wire power supply mode, a three-phase three-wire power supply mode, and a three-phase four-wire power supply mode. Illustratively, when the load is connected to a three-phase load, such as a three-phase charging gun, the user can configure the power supply control request corresponding to the three-phase five-wire power supply mode, the three-phase three-wire power supply mode, or the three-phase four-wire power supply mode to enter the corresponding power supply mode. The master control circuit 4 turns on at least part of the five-way power supply input end 1 and the five-way power supply output end 2 according to the power supply control request, so as to realize switching of different power supply modes according to the power supply control request.

[0056] As an example, the single-phase balanced power supply mode refers to a power supply mode for supplying power to a single-phase load in a balanced manner. Illustratively, when the load is connected to a three-phase load, such as a three-phase charging gun, the user can configure the power supply control request corresponding to the single-phase balanced power supply mode, and the master control circuit 4 obtains the load power supply information and determines the load power corresponding to the first phase line connected to the first phase line input end, the second phase line connected to the second phase line input end, and the third phase line connected to the third phase line input end, respectively. For example, when the first phase line, the second phase line, and the third phase line are connected to different single-phase household loads, respectively, the power consumption of the first phase line, the second phase line, and the third phase line will be unbalanced. In this example, when the single-phase load is connected, the master control circuit 4 selects the appropriate phase line input end, for example, the phase line input end corresponding to the phase line with lower power consumption, according to the power consumption of the first phase line, the second phase line, and the third phase line, and connects it to the five-way power supply output end 2, so as to realize balanced power supply to the single-phase load.

[0057] In the embodiment, the power supply control circuit comprises five power supply input ends 1, five power supply output ends 2, a switch control network 3 and a master control circuit 4; the input end of the switch control network 3 is connected with the five power supply input ends 1, and the output end of the switch control network 3 is connected with the five power supply output ends 2; the five power supply input ends 1 comprise a first phase line input end, a second phase line input end, a third phase line input end, a neutral line input end and a protective ground line input end; the five power supply output ends 2 comprise a third phase line output end, a second phase line output end, a first phase line output end, a neutral line output end and a protective ground line output end; the master control circuit 4 is connected with the switch control network 3, used for obtaining a power supply control request and load power supply information, controlling the switch control network 3 to turn on at least part of the five power supply input ends 1 and the five power supply output ends 2 according to the power supply control request and the load power supply information, so as to enter a three-phase power supply mode or a single-phase balanced power supply mode, thereby realizing switching of the three-phase power supply mode or the single-phase balanced power supply mode and single-phase load balanced power supply through switching of different turn-on modes between the five power supply input ends 1 and the five power supply output ends 2, and improving power supply flexibility to adapt to complex power consumption requirements.

[0058] In an embodiment, the switch control network 3 comprises a first switch control circuit 31, a second switch control circuit 32, a third switch control circuit 33 and a fourth switch control circuit 34; the input end of the first switch control circuit 31 is connected with the first phase line input end and the second phase line input end, and the output end of the first switch control circuit 31 is connected with the third phase line output end and the second phase line output end; the input end of the second switch control circuit 32 is connected with the first phase line input end, the second phase line input end and the third phase line input end, and the output end of the second switch control circuit 32 is connected with the first phase line output end; the input end of the third switch control circuit 33 is connected with the second phase line input end and the neutral line input end, and the output end of the third switch control circuit 33 is connected with the neutral line output end; the input end of the fourth switch control circuit 34 is connected with the protective ground line input end, and the output end of the fourth switch control circuit 34 is connected with the protective ground line output end; the master control circuit 4 is connected with the control end of the first switch control circuit 31, the control end of the second switch control circuit 32, the control end of the third switch control circuit 33 and the control end of the fourth switch control circuit 34 respectively.

[0059] As an example, when entering the three-phase power supply mode, and the three-phase power supply mode is a three-phase five-wire power supply mode, the first switch control circuit 31 turns on the first phase line input end and the third phase line output end, turns on the second phase line input end and the second phase line output end, the second switch control circuit 32 turns on the third phase line input end and the first phase line output end, the third switch control circuit 33 turns on the neutral line input end and the neutral line output end, and the fourth switch control circuit 34 turns on the protective ground line input end and the protective ground line output end.

[0060] As an example, when entering the three-phase power supply mode, and the three-phase power supply mode is the three-phase three-wire power supply mode, the first switch control circuit 31 turns on the first phase connection input end and the third phase line output end, turns on the second phase line input end and the second phase line output end, the second switch control circuit 32 turns on the third phase line input end and the first phase line output end, the third switch control circuit 33 turns off the neutral line input end and the neutral line output end, and the fourth switch control circuit 34 turns off the protective ground line input end and the protective ground line output end.

[0061] As an example, when entering the single-phase balanced power supply mode, the single-phase balanced power supply mode is carried out under the three-phase five-wire, three-phase three-wire and three-phase four-wire architecture.

[0062] As an example, the single-phase balanced power supply mode under the three-phase five-wire architecture is carried out by taking the first phase line input end, the second phase line input end, the third phase line input end, the neutral line input end and the protective ground line input end as the power supply input end, and taking the first phase line output end, the neutral line output end and the protective ground line output end as the power supply output end. According to the load power supply information, if it is judged that the first phase line electric energy data connected by the first phase line input end is normal, the first switch control circuit 31 turns off the first phase connection input end and the third phase line output end, turns off the second phase line input end and the second phase line output end, the second switch control circuit 32 turns on the first phase line input end and the first phase line output end, turns off the second phase line input end and the first phase line output end, turns off the third phase line input end and the first phase line output end, the third switch control circuit 33 turns on the neutral line input end and the neutral line output end, and the fourth switch control circuit 34 turns on the protective ground line input end and the protective ground line output end. If it is judged that the second phase line electric energy data connected by the second phase line input end is normal, the first switch control circuit 31 turns off the first phase connection input end and the third phase line output end, turns off the second phase line input end and the second phase line output end, the second switch control circuit 32 turns on the second phase line input end and the first phase line output end, turns off the first phase connection input end and the first phase line output end, turns off the third phase line input end and the first phase line output end, the third switch control circuit 33 turns on the neutral line input end and the neutral line output end, and the fourth switch control circuit 34 turns on the protective ground line input end and the protective ground line output end. If it is judged that the third phase line electric energy data connected by the third phase line input end is normal, the first switch control circuit 31 turns off the first phase connection input end and the third phase line output end, turns off the second phase line input end and the second phase line output end, the second switch control circuit 32 turns on the third phase line input end and the first phase line output end, turns off the first phase connection input end and the first phase line output end, turns off the second phase line input end and the first phase line output end, the third switch control circuit 33 turns on the neutral line input end and the neutral line output end, and the fourth switch control circuit 34 turns on the protective ground line input end and the protective ground line output end.

[0063] Exemplarily, the single-phase load balancing deployment under the three-phase three-wire architecture is configured by the first phase line input end, the second phase line input end, and the third phase line input end as the power supply input end, and the first phase line output end and the neutral line output end as the power supply output end. According to the load power supply information, if it is judged that the first phase line electric energy data connected by the first phase line input end is normal, the first switch control circuit 31 disconnects the first phase line input end and the third phase line output end, disconnects the second phase line input end and the second phase line output end, the second switch control circuit 32 turns on the first phase line input end and the first phase line output end, disconnects the second phase line input end and the first phase line output end, disconnects the third phase line input end and the first phase line output end, the third switch control circuit 33 turns on the second phase line input end and the center line output end, disconnects the neutral line input end and the neutral line output end, and the fourth switch control circuit 34 turns on the protection ground input end and the protection ground output end. If it is judged that the third phase line electric energy data connected by the third phase line input end is normal, the first switch control circuit 31 disconnects the first phase line input end and the third phase line output end, disconnects the second phase line input end and the second phase line output end, the second switch control circuit 32 turns on the third phase line input end and the third phase line output end, disconnects the first phase line input end and the first phase line output end, disconnects the second phase line input end and the first phase line output end, the third switch control circuit 33 turns on the second phase line input end and the center line output end, disconnects the neutral line input end and the neutral line output end, and the fourth switch control circuit 34 turns on the protection ground input end and the protection ground output end.

[0064] In the embodiment, the first switch control circuit 31, the second switch control circuit 32, the third switch control circuit 33, and the fourth switch control circuit 34 are used to turn on at least part of the five-way power supply input end 1 and the five-way power supply output end 2 to enter the three-phase power supply mode or the single-phase balanced power supply mode, which has simple structure, low cost, and high integration.

[0065] In an embodiment, the first switch control circuit 31 includes a first switch circuit 311 and a second switch circuit 312; the first end of the first switch circuit 311 is connected with the first phase line input end, and the second end of the first switch circuit 311 is connected with the third phase line output end; the first end of the second switch circuit 312 is connected with the second phase line input end, and the second end of the second switch circuit 312 is connected with the second phase line output end; the control end of the first switch circuit 311 and the control end of the second switch circuit 312 are connected with the main control circuit 4 respectively.

[0066] Exemplarily, the first switch circuit 311 and the second switch circuit 312 can be realized by a switch relay.

[0067] In the embodiment, the first phase line input end and the third phase line output end are controlled to be turned on and turned off, and the second phase line input end and the second phase line output end are controlled to be turned on and turned off by the first switch circuit 311 and the second switch circuit 312 respectively, so that the maintenance is facilitated when the fault occurs.

[0068] In an embodiment, the second switch control circuit 32 comprises a third switch circuit 321, a fourth switch circuit 322 and a fifth switch circuit 323; the first end of the third switch circuit 321 is connected with the first phase line input end, and the second end of the third switch circuit 321 is connected with the first phase line output end; the first end of the fourth switch circuit 322 is connected with the second phase line input end, and the second end of the fourth switch circuit 322 is connected with the first phase line output end; the first end of the fifth switch circuit 323 is connected with the third phase line input end, and the second end of the fifth switch circuit 323 is connected with the first phase line output end; the control end of the third switch circuit 321, the control end of the fourth switch circuit 322 and the control end of the fifth switch circuit 323 are connected with the main control circuit 4 respectively.

[0069] Exemplarily, the third switch circuit 321, the fourth switch circuit 322 and the fifth switch circuit 323 can be realized by switch relays.

[0070] In the embodiment, the first phase line input end and the first phase line output end are controlled to be turned on and turned off, and the second phase line input end and the first phase line output end are controlled to be turned on and turned off, and the third phase line input end and the first phase line output end are controlled to be turned on and turned off by the third switch circuit 321, the fourth switch circuit 322 and the fifth switch circuit 323 respectively, so that the maintenance is facilitated when the fault occurs.

[0071] In an embodiment, the third switch control circuit 33 comprises a sixth switch circuit 331 and a seventh switch circuit 332; the first end of the sixth switch circuit 331 is connected with the second phase line input end, and the second end of the sixth switch circuit 331 is connected with the neutral line output end; the first end of the seventh switch circuit 332 is connected with the neutral line input end, and the second end of the seventh switch circuit 332 is connected with the neutral line output end; the control end of the sixth switch circuit 331 and the control end of the seventh switch circuit 332 are connected with the main control circuit 4 respectively.

[0072] Exemplarily, the sixth switch circuit 331 and the seventh switch circuit 332 can be realized by switch relays.

[0073] In the embodiment, the second phase line input end and the neutral line output end are controlled to be turned on and turned off, and the neutral line input end and the neutral line output end are controlled to be turned on and turned off by the sixth switch circuit 331 and the seventh switch circuit 332 respectively, so that the maintenance is facilitated when the fault occurs.

[0074] In an embodiment, the third switch control circuit 33 comprises an eighth switch circuit 341, a first end of the eighth switch circuit 341 is connected with the protective ground input end, a second end of the eighth switch circuit 341 is connected with the protective ground output end, and a control end of the eighth switch circuit 341 is connected with the main control circuit 4.

[0075] The embodiment provides a power supply control method, which is applied to the main control circuit 4 of the power supply control circuit, and comprises the following steps of: Figure 3

[0076] S301: obtaining a power supply control request and load power supply information.

[0077] S302: if the power supply control request is a first control request, controlling the switch control network 3 to turn on the first phase line input end and the third phase line output end, turn on the second phase line input end and the second phase line output end, turn on the third phase line input end and the first phase line output end, turn on the neutral line input end and the neutral line output end, and turn on the protective ground input end and the protective ground output end.

[0078] S303: if the power supply control request is a second control request, controlling the switch control network 3 to turn on the first phase line input end and the third phase line output end, turn on the second phase line input end and the second phase line output end, turn on the third phase line input end and the first phase line output end, turn off the neutral line input end and the neutral line output end, and turn off the protective ground input end and the protective ground output end.

[0079] S304: if the power supply control request is a third control request, controlling the switch control network 3 to turn off the first phase line input end and the third phase line output end, turn off the second phase line input end and the second phase line output end, turn on the neutral line input end and the neutral line output end, and turn on the protective ground input end and the protective ground output end, and according to the load power supply information, selecting one of the first phase line input end, the second phase line input end and the third phase line input end to be turned on with the first phase line output end.

[0080] S305: if the power supply control request is a fourth control request, controlling the switch control network 3 to turn off the first phase line input end and the third phase line output end, turn off the second phase line input end and the second phase line output end, turn off the neutral line input end and the neutral line output end, turn off the protective ground input end and the protective ground output end, turn on the second phase line input end and the neutral line output end, and according to the load power supply information, selecting one of the first phase line input end and the third phase line input end to be turned on with the first phase line output end.

[0081] ​In step S301, the power supply control request refers to a power supply mode selection request. The user configures the power supply control request through the man-machine interaction terminal, and the man-machine interaction terminal sends the power supply control request to the main control circuit 4, so as to perform power supply mode selection switching. The load power supply information refers to the power supply information obtained from the five-way power supply input end 1 when the power supply control circuit is loaded. The power supply information includes the power supply voltage and the power supply current. Understandably, the power supply information includes the power supply voltage and the power supply current corresponding to each phase line. The load power supply information can be connected to the power supply control circuit through the signal acquisition module 5, which is used to connect the five-way power supply input end 1 to acquire the load power supply information. Exemplarily, the signal acquisition module 5 includes a current transformer and a voltage transformer connected to the input phase line.

[0082] In step S302, if the power supply control request is the first control request, the switch control network 3 is controlled to turn on the first phase line input end and the third phase line output end, turn on the second phase line input end and the second phase line output end, turn on the third phase line input end and the first phase line output end, turn on the neutral line input end and the neutral line output end, and turn on the protective ground line input end and the protective ground line output end, so as to switch to the three-phase five-wire power supply mode.

[0083] In step S303, if the power supply control request is the second control request, the switch control network 3 is controlled to turn on the first phase line input end and the third phase line output end, turn on the second phase line input end and the second phase line output end, turn on the third phase line input end and the first phase line output end, turn off the neutral line input end and the neutral line output end, and turn off the protective ground line input end and the protective ground line output end, so as to switch to the three-phase three-wire power supply mode.

[0084] In step S304, if the power supply control request is the third control request, the switch control network 3 is controlled to turn off the first phase line input end and the third phase line output end, turn off the second phase line input end and the second phase line output end, turn on the neutral line input end and the neutral line output end, and turn on the protective ground line input end and the protective ground line output end, and according to the load power supply information, one of the first phase line input end, the second phase line input end and the third phase line input end is selected to be connected to the first phase line output end, so as to realize single-phase load balancing allocation under the three-phase five-wire architecture.

[0085] In step S305, if the power supply control request is the fourth control request, the switch control network 3 is controlled to turn off the first phase line input end and the third phase line output end, turn off the second phase line input end and the second phase line output end, turn off the neutral line input end and the neutral line output end, and turn off the protective ground line input end and the protective ground line output end, turn on the second phase line input end and the neutral line output end, and according to the load power supply information, one of the first phase line input end and the third phase line input end is selected to be connected to the first phase line output end, so as to realize single-phase load balancing allocation under the three-phase three-wire architecture.

[0086] In the embodiment, the main control circuit 4 implements three-phase five-wire power supply mode, three-phase three-wire power supply mode, single-phase load balancing allocation under three-phase five-wire architecture and single-phase load balancing allocation under three-phase three-wire architecture according to the power supply control request and the load power supply information, and improves power supply flexibility to adapt to complex power consumption demand.

[0087] The embodiment provides a power supply control system, which comprises the signal acquisition module 5 and the power supply control circuit.

[0088] In an embodiment, the signal acquisition module 5 comprises a current transformer and a voltage transformer connected with the input phase line.

[0089] The embodiment provides a charging pile, which comprises the power supply control system.

[0090] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the same; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently; and the modification or replacement does not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A power supply control circuit, characterized by comprising: The switch control network includes a first switch control circuit, a second switch control circuit, a third switch control circuit and a fourth switch control circuit. The input end of the first switch control circuit is connected with the first phase line input end and the second phase line input end, and the output end of the first switch control circuit is connected with the third phase line output end and the second phase line output end. The input end of the second switch control circuit is connected with the first phase line input end, the second phase line input end and the third phase line input end, and the output end of the second switch control circuit is connected with the first phase line output end. The input end of the third switch control circuit is connected with the second phase line input end and the neutral line input end, and the output end of the third switch control circuit is connected with the neutral line output end. The input end of the fourth switch control circuit is connected with the protective ground line input end, and the output end of the fourth switch control circuit is connected with the protective ground line output end. The control end of the first switch control circuit, the control end of the second switch control circuit, the control end of the third switch control circuit and the control end of the fourth switch control circuit are connected with the control end of the first switch control circuit, the control end of the second switch control circuit, the control end of the third switch control circuit and the control end of the fourth switch control circuit of the main control circuit respectively. The first end of the first switch circuit is connected with the first phase line input end, and the second end of the first switch circuit is connected with the third phase line output end. The first end of the second switch circuit is connected with the second phase line input end, and the second end of the second switch circuit is connected with the second phase line output end. The control end of the first switch circuit and the control end of the second switch circuit are connected with the control end of the first switch circuit and the control end of the second switch circuit of the main control circuit respectively.

2. The power supply control circuit of claim 1, wherein, The first end of the third switch circuit is connected with the first phase line input end, and the second end of the third switch circuit is connected with the first phase line output end. The first end of the fourth switch circuit is connected with the second phase line input end, and the second end of the fourth switch circuit is connected with the first phase line output end. The first end of the fifth switch circuit is connected with the third phase line input end, and the second end of the fifth switch circuit is connected with the neutral line output end. ​ 3. The power supply control circuit of claim 1, wherein, ​ ​ ​ The first end of the fifth switch circuit is connected with the third phase line input end, and the second end of the fifth switch circuit is connected with the first phase line output end; The control end of the third switch circuit, the control end of the fourth switch circuit and the control end of the fifth switch circuit are connected with the main control circuit respectively.

4. The power supply control circuit of claim 1, wherein, The third switch control circuit comprises a sixth switch circuit and a seventh switch circuit; The first end of the sixth switch circuit is connected with the second phase line input end, and the second end of the sixth switch circuit is connected with the neutral line output end; The first end of the seventh switch circuit is connected with the neutral line input end, and the second end of the seventh switch circuit is connected with the neutral line output end; The control end of the sixth switch circuit and the control end of the seventh switch circuit are connected with the main control circuit respectively.

5. The power supply control circuit of claim 1, wherein, The third switch control circuit comprises an eighth switch circuit; The first end of the eighth switch circuit is connected with the protective ground line input end, the second end of the eighth switch circuit is connected with the protective ground line output end, and the control end of the eighth switch circuit is connected with the main control circuit.

6. A power supply control method characterized by, The application is applied to the main control circuit of the power supply control circuit in any one of claims 1 to 5, comprising: obtaining a power supply control request and load power supply information; if the power supply control request is a first control request, controlling the switch control network to turn on the first phase line input end and the third phase line output end, turn on the second phase line input end and the second phase line output end, turn on the third phase line input end and the first phase line output end, turn on the neutral line input end and the neutral line output end, and turn on the protective ground line input end and the protective ground line output end; if the power supply control request is a second control request, controlling the switch control network to turn on the first phase line input end and the third phase line output end, turn on the second phase line input end and the second phase line output end, turn on the third phase line input end and the first phase line output end, turn off the neutral line input end and the neutral line output end, and turn off the protective ground line input end and the protective ground line output end; if the power supply control request is a third control request, controlling the switch control network to turn off the first phase line input end and the third phase line output end, turn off the second phase line input end and the second phase line output end, turn on the neutral line input end and the neutral line output end, and turn on the protective ground line input end and the protective ground line output end, and according to the load power supply information, selecting one from the first phase line input end, the second phase line input end and the third phase line input end to be connected with the first phase line output end; If the power supply control request is a fourth control request, the switch control network is controlled to disconnect the first phase line input end and the third phase line output end, disconnect the second phase line input end and the second phase line output end, disconnect the neutral line input end and the neutral line output end, disconnect the protective ground line input end and the protective ground line output end, connect the second phase line input end and the neutral line output end, and according to the load power supply information, select one of the first phase line input end and the third phase line input end to be connected to the first phase line output end.

7. A power supply control system characterized by comprising: The power supply control system comprises a signal acquisition module and the power supply control circuit according to any one of claims 1 to 5; the signal acquisition module is connected to the power supply control circuit and is used for connecting five power supply input ends and acquiring load power supply information.

8. The power supply control system of claim 7, wherein, The signal acquisition module comprises a current transformer and a voltage transformer connected to the first phase line input end, the second phase line input end and the third phase line input end.

9. A charging post, characterized in that The power supply control system according to claim 7 or 8.

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