Power supply control circuit, method and system and charging pile

Abstract

The invention discloses a power supply control circuit, method and system and a charging pile. According to the power supply control circuit, the input end of a switch control network is connected with five power supply input ends, and the output end of the switch control network is connected with five power supply output ends; the main control circuit is connected with the switch control network and is 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-path power supply input ends and the five-path power supply output ends 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; therefore, switching of a three-phase power supply mode or a single-phase balanced power supply mode and single-phase load balanced power supply are realized by switching different conduction modes between the five power supply input ends and the five power supply output ends, and the power supply flexibility is improved so as to adapt to complex power utilization requirements.

Description

Technical Field

[0001] The present invention relates to the field of new energy technologies, and particularly to a power supply control circuit, method, system, and charging pile. Background Art

[0002] Currently, power distribution mainly relies on standard architectures such as TN-S (three-phase five-wire system), IT (neutral point not grounded), and TNC (three-phase four-wire system). Each system operates independently and cannot be dynamically switched. For example, the TN-S system has high safety but high costs, the IT system has strong power supply continuity but is not suitable for large-capacity unbalanced loads, and the TNC system has a simple structure but has potential safety hazards. Existing technologies usually adopt mechanical switches or static protection strategies, lacking intelligent optimization of load characteristics, three-phase balance, and energy efficiency, resulting in insufficient system flexibility and difficulty in adapting to complex electricity demands. Summary of the Invention

[0003] Embodiments of the present invention provide a power supply control circuit, method, system, and charging pile to solve the problem that the existing power supply system has insufficient flexibility and difficulty in adapting to complex electricity demands.

[0004] A power supply control circuit includes five power supply input terminals, five power supply output terminals, a switch control network, and a main control circuit; The input terminal of the switch control network is connected to the five power supply input terminals, and the output terminal of the switch control network is connected to the five power supply output terminals; the five power supply input terminals include a first phase line input terminal, a second phase line input terminal, a third phase line input terminal, a neutral line input terminal, and a protective ground wire input terminal; the five power supply output terminals include a third phase line output terminal, a second phase line output terminal, a first phase line output terminal, a neutral line output terminal, and a protective ground wire output terminal; The main control circuit is connected to the switch control network and is configured to obtain a power supply control request and load power supply information, and control the switch control network to conduct at least part of the five power supply input terminals and the five power supply output terminals 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.

[0005] Further, 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 terminal of the first switch control circuit is connected to the first phase line input terminal and the second phase line input terminal, and the output terminal of the first switch control circuit is connected to the third phase line output terminal and the second phase line output terminal; The input terminal of the second switch control circuit is connected to the first phase line input terminal, the second phase line input terminal, and the third phase line input terminal, and the output terminal of the second switch control circuit is connected to the first phase line output terminal; The input end of the third switch control circuit is connected to the second phase line input end and the neutral line input end, and the output end of the third switch control circuit is connected to the neutral line output end; The input end of the fourth switch control circuit is connected to the protective ground wire input end, and the output end of the fourth switch control circuit is connected to the protective ground wire output end; The main control circuit is respectively connected to the control ends of the first switch control circuit, the second switch control circuit, the third switch control circuit, and the fourth switch control circuit.

[0006] Further, the first switch control circuit includes a first switch circuit and a second switch circuit; The first end of the first switch circuit is connected to the first phase line input end, and the second end of the first switch circuit is connected to the third phase line output end; The first end of the second switch circuit is connected to the second phase line input end, and the second end of the second switch circuit is connected to the second phase line output end; The main control circuit is respectively connected to the control end of the first switch circuit and the control end of the second switch circuit.

[0007] Further, the second switch control circuit includes a third switch circuit, a fourth switch circuit, and a fifth switch circuit; The first end of the third switch circuit is connected to the first phase line input end, and the second end of the third switch circuit is connected to the first phase line output end; The first end of the fourth switch circuit is connected to the second phase line input end, and the second end of the fourth switch circuit is connected to the first phase line output end; The first end of the fifth switch circuit is connected to the third phase line input end, and the second end of the fifth switch circuit is connected to the first phase line output end; The main control circuit is respectively connected to 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.

[0008] Further, the third switch control circuit includes a sixth switch circuit and a seventh switch circuit; The first end of the sixth switch circuit is connected to the second phase line input end, and the second end of the sixth switch circuit is connected to the neutral line output end; The first end of the seventh switch circuit is connected to the neutral line input end, and the second end of the seventh switch circuit is connected to the neutral line output end; The main control circuit is respectively connected to the control end of the sixth switch circuit and the control end of the seventh switch circuit.

[0009] Further, the third switch control circuit includes an eighth switch circuit; The first end of the eighth switch circuit is connected to the protective ground wire input terminal, the second end of the eighth switch circuit is connected to the protective ground wire output terminal, and the control end of the eighth switch circuit is connected to the main control circuit.

[0010] A power supply control method is applied to the main control circuit of the above power supply control circuit, and includes: Obtain a power supply control request and load power supply information; If the power supply control request is a first control request, control the switch control network to conduct the first phase wire input terminal and the third phase wire output terminal, conduct the second phase wire input terminal and the second phase wire output terminal, conduct the third phase wire input terminal and the first phase wire output terminal, conduct the neutral wire input terminal and the neutral wire output terminal, and conduct the protective ground wire input terminal and the protective ground wire output terminal; If the power supply control request is a second control request, control the switch control network to conduct the first phase wire input terminal and the third phase wire output terminal, conduct the second phase wire input terminal and the second phase wire output terminal, conduct the third phase wire input terminal and the first phase wire output terminal, disconnect the neutral wire input terminal and the neutral wire output terminal, and disconnect the protective ground wire input terminal and the protective ground wire output terminal; If the power supply control request is a third control request, control the switch control network to disconnect the first phase wire input terminal and the third phase wire output terminal, disconnect the second phase wire input terminal and the second phase wire output terminal, conduct the neutral wire input terminal and the neutral wire output terminal, and conduct the protective ground wire input terminal and the protective ground wire output terminal, and select one from the first phase wire input terminal, the second phase wire input terminal, and the third phase wire input terminal to conduct with the first phase wire output terminal according to the load power supply information; If the power supply control request is a fourth control request, control the switch control network to disconnect the first phase wire input terminal and the third phase wire output terminal, disconnect the second phase wire input terminal and the second phase wire output terminal, disconnect the neutral wire input terminal and the neutral wire output terminal, disconnect the protective ground wire input terminal and the protective ground wire output terminal, conduct the second phase wire input terminal and the neutral wire output terminal, and select one from the first phase wire input terminal and the third phase wire input terminal to conduct with the first phase wire output terminal according to the load power supply information.

[0011] A power supply control system includes a signal acquisition module and the above power supply control circuit; the signal acquisition module is connected to the power supply control circuit and is used to connect five power supply input terminals to acquire load power supply information.

[0012] Further, the signal acquisition module includes a current transformer and a voltage transformer connected to the input phase line.

[0013] A charging pile includes the above-mentioned power supply control system.

[0014] An embodiment of the present invention provides a power supply control circuit, method, system and charging pile. The power supply control circuit includes five power supply input ends, five power supply output ends, a switch control network and a main 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 include 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 wire input end; the five power supply output ends include 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 wire output end; the main control circuit is connected to the switch control network and is used to obtain a power supply control request and load power supply information, and according to the power supply control request and load power supply information, control the switch control network to conduct at least part of the five power supply input ends and the five power supply output ends to enter a three-phase power supply mode or a single-phase balanced power supply mode, so as to realize the switching between the three-phase power supply mode and the single-phase balanced power supply mode and the single-phase load balanced power supply by switching different conduction modes between the five power supply input ends and the five power supply output ends, improve the power supply flexibility, and adapt to complex power consumption requirements. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0016] Figure 1 is a schematic diagram of a power supply control circuit in an embodiment of the present invention; Figure 2 is another schematic diagram of a power supply control circuit in an embodiment of the present invention; Figure 3 is a flowchart of a power supply control method in an embodiment of the present invention.

[0017] In the figure: 1. Five-way power supply input terminal; 2. Five-way power supply output terminal; 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. Specific implementation mode

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] It should be understood that the present invention can be implemented in different forms and should not be construed as limited to the embodiments set forth herein. On the contrary, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. In the drawings, for clarity, the dimensions and relative dimensions of layers and regions may be exaggerated. The same reference numerals throughout the drawings denote the same elements.

[0020] It should be understood that when an element or layer is referred to as being "on", "adjacent to", "connected to" or "coupled to" another element or layer, it can be directly on, adjacent to, connected or coupled to the other element or layer, or there may be intervening elements or layers. In contrast, when an element is referred to as being "directly on", "directly adjacent to", "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Thus, a first element, component, region, layer or part discussed below may be denoted as a second element, component, region, layer or part without departing from the teachings of the present invention.

[0021] Spatial relationship terms such as "under", "below", "lower", "beneath", "above", "upper", etc. may be used herein for convenience of description to describe the relationship of one element or feature shown in the figures with other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatial relationship terms are also intended to include different orientations of the device in use and operation. For example, if the device in the attached drawings is flipped, then an element or feature described as "under other elements" or "beneath them" or "under it" will be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "beneath" can include both the upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatial descriptors used herein are to be interpreted accordingly.

[0022] The purpose of the terms used herein is only to describe specific embodiments and is not a limitation of the present invention. As used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, identify the presence of the 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. As used herein, the term "and / or" includes any and all combinations of the associated listed items.

[0023] To fully understand the present invention, detailed structures and steps will be set forth in the following description to explain the technical solutions proposed by the present invention. The preferred embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention may have other embodiments.

[0024] This embodiment provides a power supply control circuit applied in a charging pile. Specifically, the power supply control circuit is applied in a power supply control system in the charging pile.

[0025] Exemplarily, the charging pile is applied in a household power supply system. The household power supply system includes a distribution box, a charging pile and household loads. The distribution box is connected to the municipal power grid, the charging pile and the household loads, and is used to draw power from the municipal power grid and supply power to the charging pile and the household loads. It can be understood that the municipal power grid includes a first phase line, a second phase line, a third phase line, a neutral line and a protective ground wire.

[0026] Exemplarily, the power supply system in the charging pile includes a signal acquisition module 5 and the above-mentioned power supply control circuit; the signal acquisition module 5 is connected to the power supply control circuit and is used to connect five power supply input ends 1 to acquire load power supply information. Specifically, the signal acquisition module 5 includes a current transformer and a voltage transformer connected to the input phase line. Among the first phase line, the second phase line, and the third phase line connected to the five power supply input ends 1, each phase line is provided with a current transformer and a voltage transformer to acquire the current and voltage of each phase line, so as to judge the current load-carrying capacity of each phase line, facilitating the power supply control circuit to perform load balancing allocation.

[0027] This embodiment provides a power supply control circuit, as Figure 1 and Figure 2 shown, which includes five power supply input ends 1, five power supply output ends 2, a switch control network 3, and a main control circuit 4; the input end of the switch control network 3 is connected to the five power supply input ends 1, and the output end of the switch control network 3 is connected to the five power supply output ends 2; the five power supply input ends 1 include 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 wire input end; the five power supply output ends 2 include 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 wire output end; the main control circuit 4 is connected to the switch control network 3 and is used to obtain a power supply control request and load power supply information, and according to the power supply control request and load power supply information, control the switch control network 3 to conduct at least part of the five power supply input ends 1 and the five power supply output ends 2 to enter a three-phase power supply mode or a single-phase balanced power supply mode.

[0028] Exemplarily, the five power supply output ends 2 include 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 wire input end, which are respectively used to connect the first phase line, the second phase line, the third phase line, the center line, and the protective ground wire of the municipal power grid. The five power supply output ends 2 include 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 wire output end, which are used to connect load devices. 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 is used to connect an electric vehicle.

[0029] 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 a human-computer interaction terminal, and the human-computer interaction terminal sends the power supply control request to the main control circuit 4, thereby performing power supply mode selection and switching. The load power supply information refers to the power supply information obtained from the five power supply input ends 1 when the power supply control circuit is loaded. The power supply information includes supply voltage and supply current. It can be understood that the power supply information includes the supply voltage and supply current corresponding to each phase line.

[0030] 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. Exemplarily, when a load is connected to a three-phase load, such as a three-phase charging gun, the user can configure a 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 main control circuit 4 conducts at least part of the five-way power supply input terminals 1 and the five-way power supply output terminals 2 according to the power supply control request, thereby realizing the switching of different power supply modes according to the power supply control request.

[0031] As an example, the single-phase balanced power supply mode refers to a power supply mode in which single-phase load balanced power supply is performed when a single-phase load is connected. Exemplarily, when a load is connected to a three-phase load, such as a three-phase charging gun, the user can configure a power supply control request corresponding to the single-phase balanced power supply mode, and the main 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 terminal, the second phase line connected to the second phase line input terminal, and the third phase line connected to the third phase line input terminal according to the load power supply information. For example, when the first phase line, the second phase line, and the third phase line are respectively connected to different single-phase household loads, it will cause the uneven power consumption of the first phase line, the second phase line, and the third phase line. In this example, when a single-phase load is connected, the main control circuit 4 selects a suitable phase line input terminal corresponding to, for example, the phase line with a lower power consumption and connects it to the five-way power supply output terminal 2 according to the load power supply information and the power consumption of the first phase line, the second phase line, and the third phase line, so as to realize single-phase load balanced power supply.

[0032] In this embodiment, the power supply control circuit includes a five-way power supply input terminal 1, a five-way power supply output terminal 2, a switch control network 3, and a main control circuit 4; the input terminal of the switch control network 3 is connected to the five-way power supply input terminal 1, and the output terminal of the switch control network 3 is connected to the five-way power supply output terminal 2; the five-way power supply input terminal 1 includes a first phase line input terminal, a second phase line input terminal, a third phase line input terminal, a neutral line input terminal, and a protective ground wire input terminal; the five-way power supply output terminal 2 includes a third phase line output terminal, a second phase line output terminal, a first phase line output terminal, a neutral line output terminal, and a protective ground wire output terminal; the main control circuit 4 is connected to the switch control network 3 and is used to obtain the power supply control request and the load power supply information, and control the switch control network 3 to conduct at least part of the five-way power supply input terminal 1 and the five-way power supply output terminal 2 according to the power supply control request and the load power supply information to enter the three-phase power supply mode or the single-phase balanced power supply mode, so as to realize the switching of the three-phase power supply mode or the single-phase balanced power supply mode and the single-phase load balanced power supply by switching different conduction modes between the five-way power supply input terminal 1 and the five-way power supply output terminal 2, improve the power supply flexibility, and adapt to complex power consumption requirements.

[0033] In one embodiment, the switch control network 3 includes 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 terminal of the first switch control circuit 31 is connected to the first phase line input terminal and the second phase line input terminal, and the output terminal of the first switch control circuit 31 is connected to the third phase line output terminal and the second phase line output terminal. The input terminal of the second switch control circuit 32 is connected to the first phase line input terminal, the second phase line input terminal, and the third phase line input terminal, and the output terminal of the second switch control circuit 32 is connected to the first phase line output terminal. The input terminal of the third switch control circuit 33 is connected to the second phase line input terminal and the neutral line input terminal, and the output terminal of the third switch control circuit 33 is connected to the neutral line output terminal. The input terminal of the fourth switch control circuit 34 is connected to the protective ground wire input terminal, and the output terminal of the fourth switch control circuit 34 is connected to the protective ground wire output terminal. The main control circuit 4 is respectively connected to the control terminals of 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.

[0034] As an example, when entering the three-phase power supply mode and the three-phase power supply mode is the five-wire three-phase power supply mode, the first switch control circuit 31 conducts the first connected input terminal and the third phase line output terminal, conducts the second phase line input terminal and the second phase line output terminal, the second switch control circuit 32 conducts the third phase line input terminal and the first phase line output terminal, the third switch control circuit 33 conducts the neutral line input terminal and the neutral line output terminal, and the fourth switch control circuit 34 conducts the protective ground wire input terminal and the protective ground wire output terminal.

[0035] As an example, when entering the three-phase power supply mode and the three-phase power supply mode is the three-wire three-phase power supply mode, the first switch control circuit 31 conducts the first connected input terminal and the third phase line output terminal, conducts the second phase line input terminal and the second phase line output terminal, the second switch control circuit 32 conducts the third phase line input terminal and the first phase line output terminal, the third switch control circuit 33 disconnects the neutral line input terminal and the neutral line output terminal, and the fourth switch control circuit 34 disconnects the protective ground wire input terminal and the protective ground wire output terminal.

[0036] As an example, when entering the single-phase balanced power supply mode, the single-phase balanced power supply mode performs single-phase load balancing allocation under the five-wire three-phase, three-wire three-phase, and four-wire three-phase architectures.

[0037] Exemplarily, for single-phase load balancing and allocation under a three-phase five-wire system architecture, the first phase wire input terminal, the second phase wire input terminal, the third phase wire input terminal, the neutral wire input terminal, and the protective ground wire input terminal are used as power supply input terminals, and the first phase wire output terminal, the neutral wire output terminal, and the protective ground wire output terminal are used as power supply output terminals. According to the load power supply information, if it is determined that the power energy data of the first phase wire connected to the first phase wire input terminal is normal, the first switch control circuit 31 disconnects the first phase wire input terminal and the third phase wire output terminal, disconnects the second phase wire input terminal and the second phase wire output terminal, the second switch control circuit 32 conducts the first phase wire input terminal and the first phase wire output terminal, disconnects the second phase wire input terminal and the first phase wire output terminal, disconnects the third phase wire input terminal and the first phase wire output terminal, the third switch control circuit 33 conducts the neutral wire input terminal and the neutral wire output terminal, and the fourth switch control circuit 34 conducts the protective ground wire input terminal and the protective ground wire output terminal. If it is determined that the power energy data of the second phase wire connected to the second phase wire input terminal is normal, the first switch control circuit 31 disconnects the first phase wire input terminal and the third phase wire output terminal, disconnects the second phase wire input terminal and the second phase wire output terminal, the second switch control circuit 32 conducts the second phase wire input terminal and the first phase wire output terminal, disconnects the first phase wire input terminal and the first phase wire output terminal, disconnects the third phase wire input terminal and the first phase wire output terminal, the third switch control circuit 33 conducts the neutral wire input terminal and the neutral wire output terminal, and the fourth switch control circuit 34 conducts the protective ground wire input terminal and the protective ground wire output terminal. If it is determined that the power energy data of the third phase wire connected to the third phase wire input terminal is normal, the first switch control circuit 31 disconnects the first phase wire input terminal and the third phase wire output terminal, disconnects the second phase wire input terminal and the second phase wire output terminal, the second switch control circuit 32 conducts the third phase wire input terminal and the first phase wire output terminal, disconnects the first phase wire input terminal and the first phase wire output terminal, disconnects the second phase wire input terminal and the first phase wire output terminal, the third switch control circuit 33 conducts the neutral wire input terminal and the neutral wire output terminal, and the fourth switch control circuit 34 conducts the protective ground wire input terminal and the protective ground wire output terminal.

[0038] Exemplarily, for the single-phase load balancing and allocation under a three-phase three-wire system architecture, the first phase wire input terminal, the second phase wire input terminal, and the third phase wire input terminal are used as power supply input terminals, and the first phase wire output terminal and the neutral wire output terminal are used as power supply output terminals. According to the load power supply information, if it is determined that the power data of the first phase wire connected to the first phase wire input terminal is normal, the first switch control circuit 31 disconnects the first phase wire input terminal and the third phase wire output terminal, disconnects the second phase wire input terminal and the second phase wire output terminal, the second switch control circuit 32 conducts the first phase wire input terminal and the first phase wire output terminal, disconnects the second phase wire input terminal and the first phase wire output terminal, disconnects the third phase wire input terminal and the first phase wire output terminal, the third switch control circuit 33 conducts the second phase wire input terminal and the center wire output terminal, disconnects the neutral wire input terminal and the neutral wire output terminal, and the fourth switch control circuit 34 conducts the protective ground wire input terminal and the protective ground wire output terminal. If it is determined that the power data of the third phase wire connected to the third phase wire input terminal is normal, the first switch control circuit 31 disconnects the first phase wire input terminal and the third phase wire output terminal, disconnects the second phase wire input terminal and the second phase wire output terminal, the second switch control circuit 32 conducts the third phase wire input terminal and the third phase wire output terminal, disconnects the first phase wire input terminal and the first phase wire output terminal, disconnects the second phase wire input terminal and the first phase wire output terminal, the third switch control circuit 33 conducts the second phase wire input terminal and the center wire output terminal, disconnects the neutral wire input terminal and the neutral wire output terminal, and the fourth switch control circuit 34 conducts the protective ground wire input terminal and the protective ground wire output terminal.

[0039] In this 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 conduct at least part of the five-way power supply input terminal 1 and the five-way power supply output terminal 2 to enter the three-phase power supply mode or the single-phase balanced power supply mode, with a simple structure, low cost, and high integration.

[0040] In one 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 to the first phase wire input terminal, and the second end of the first switch circuit 311 is connected to the third phase wire output terminal; the first end of the second switch circuit 312 is connected to the second phase wire input terminal, and the second end of the second switch circuit 312 is connected to the second phase wire output terminal; the main control circuit 4 is respectively connected to the control end of the first switch circuit 311 and the control end of the second switch circuit 312.

[0041] Exemplarily, the first switch circuit 311 and the second switch circuit 312 can be implemented by switch relays.

[0042] In this embodiment, the first switch circuit 311 and the second switch circuit 312 are respectively used to control the conduction and cutoff of the first phase line input terminal and the third phase line output terminal, as well as the conduction and cutoff between the second phase line input terminal and the second phase line output terminal, which is convenient for maintenance when a fault occurs.

[0043] In one embodiment, the second switch control circuit 32 includes 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 to the first phase line input terminal, and the second end of the third switch circuit 321 is connected to the first phase line output terminal; the first end of the fourth switch circuit 322 is connected to the second phase line input terminal, and the second end of the fourth switch circuit 322 is connected to the first phase line output terminal; the first end of the fifth switch circuit 323 is connected to the third phase line input terminal, and the second end of the fifth switch circuit 323 is connected to the first phase line output terminal; the main control circuit 4 is respectively connected to the control terminals of the third switch circuit 321, the fourth switch circuit 322, and the fifth switch circuit 323.

[0044] Exemplarily, the third switch circuit 321, the fourth switch circuit 322, and the fifth switch circuit 323 can be implemented by switch relays.

[0045] In this embodiment, the third switch circuit 321, the fourth switch circuit 322, and the fifth switch circuit 323 are respectively used to control the conduction and cutoff of the first phase line input terminal and the first phase line output terminal, as well as the conduction and cutoff between the second phase line input terminal and the first phase line output terminal, and the conduction and cutoff between the third phase line input terminal and the first phase line output terminal, which is convenient for maintenance when a fault occurs.

[0046] In one embodiment, the third switch control circuit 33 includes a sixth switch circuit 331 and a seventh switch circuit 332; the first end of the sixth switch circuit 331 is connected to the second phase line input terminal, and the second end of the sixth switch circuit 331 is connected to the neutral line output terminal; the first end of the seventh switch circuit 332 is connected to the neutral line input terminal, and the second end of the seventh switch circuit 332 is connected to the neutral line output terminal; the main control circuit 4 is respectively connected to the control terminals of the sixth switch circuit 331 and the seventh switch circuit 332.

[0047] Exemplarily, the sixth switch circuit 331 and the seventh switch circuit 332 can be implemented by switch relays.

[0048] In this embodiment, the sixth switch circuit 331 and the seventh switch circuit 332 are respectively used to control the conduction and cutoff of the second phase line input terminal and the neutral line output terminal, as well as the conduction and cutoff between the neutral line input terminal and the neutral line output terminal, which is convenient for maintenance when a fault occurs.

[0049] In one embodiment, the third switch control circuit 33 includes an eighth switch circuit 341; a first end of the eighth switch circuit 341 is connected to a protective ground wire input terminal, a second end of the eighth switch circuit 341 is connected to a protective ground wire output terminal, and a control end of the eighth switch circuit 341 is connected to the main control circuit 4.

[0050] This embodiment provides a power supply control method, which is applied to the main control circuit 4 of the above-mentioned power supply control circuit, as Figure 3 shown, including: S301: Obtain a power supply control request and load power supply information.

[0051] S302: If the power supply control request is a first control request, control the switch control network 3 to conduct the first phase wire input terminal and the third phase wire output terminal, conduct the second phase wire input terminal and the second phase wire output terminal, conduct the third phase wire input terminal and the first phase wire output terminal, conduct the neutral wire input terminal and the neutral wire output terminal, and conduct the protective ground wire input terminal and the protective ground wire output terminal.

[0052] S303: If the power supply control request is a second control request, control the switch control network 3 to conduct the first phase wire input terminal and the third phase wire output terminal, conduct the second phase wire input terminal and the second phase wire output terminal, conduct the third phase wire input terminal and the first phase wire output terminal, disconnect the neutral wire input terminal and the neutral wire output terminal, and disconnect the protective ground wire input terminal and the protective ground wire output terminal.

[0053] S304: If the power supply control request is a third control request, control the switch control network 3 to disconnect the first phase wire input terminal and the third phase wire output terminal, disconnect the second phase wire input terminal and the second phase wire output terminal, conduct the neutral wire input terminal and the neutral wire output terminal, and conduct the protective ground wire input terminal and the protective ground wire output terminal, and select one from the first phase wire input terminal, the second phase wire input terminal, and the third phase wire input terminal to conduct with the first phase wire output terminal according to the load power supply information.

[0054] S305: If the power supply control request is a fourth control request, control the switch control network 3 to disconnect the first phase wire input terminal and the third phase wire output terminal, disconnect the second phase wire input terminal and the second phase wire output terminal, disconnect the neutral wire input terminal and the neutral wire output terminal, disconnect the protective ground wire input terminal and the protective ground wire output terminal, conduct the second phase wire input terminal and the neutral wire output terminal, and select one from the first phase wire input terminal and the third phase wire input terminal to conduct with the first phase wire output terminal according to the load power supply information.

[0055] 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 human-machine interaction terminal, and the human-machine interaction terminal sends the power supply control request to the main control circuit 4 to perform the power supply mode selection and switching. The load power supply information refers to the power supply information obtained from the five-way power supply input terminal 1 when the power supply control circuit is loaded. This power supply information includes the supply voltage and supply current. It can be understood that this power supply information includes the supply voltage and supply current corresponding to each phase wire. 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 to the five-way power supply input terminal 1 and collect the load power supply information. Exemplarily, the signal acquisition module 5 includes a current transformer and a voltage transformer connected to the input phase wire.

[0056] In step S302, if the power supply control request is the first control request, the control switch control network 3 conducts the first phase wire input terminal and the third phase wire output terminal, conducts the second phase wire input terminal and the second phase wire output terminal, conducts the third phase wire input terminal and the first phase wire output terminal, conducts the neutral wire input terminal and the neutral wire output terminal, and conducts the protective ground wire input terminal and the protective ground wire output terminal to switch to the three-phase five-wire power supply mode.

[0057] In step S303, if the power supply control request is the second control request, the control switch control network 3 conducts the first phase wire input terminal and the third phase wire output terminal, conducts the second phase wire input terminal and the second phase wire output terminal, conducts the third phase wire input terminal and the first phase wire output terminal, disconnects the neutral wire input terminal and the neutral wire output terminal, and disconnects the protective ground wire input terminal and the protective ground wire output terminal to switch to the three-phase three-wire power supply mode.

[0058] In step S304, if the power supply control request is the third control request, the control switch control network 3 disconnects the first phase wire input terminal and the third phase wire output terminal, disconnects the second phase wire input terminal and the second phase wire output terminal, conducts the neutral wire input terminal and the neutral wire output terminal, and conducts the protective ground wire input terminal and the protective ground wire output terminal, and selects one from the first phase wire input terminal, the second phase wire input terminal, and the third phase wire input terminal to conduct with the first phase wire output terminal according to the load power supply information to achieve single-phase load balanced allocation under the three-phase five-wire system architecture.

[0059] In step S305, if the power supply control request is the fourth control request, the control switch control network 3 disconnects the first phase wire input terminal and the third phase wire output terminal, disconnects the second phase wire input terminal and the second phase wire output terminal, disconnects the neutral wire input terminal and the neutral wire output terminal, disconnects the protective ground wire input terminal and the protective ground wire output terminal, conducts the second phase wire input terminal and the neutral wire output terminal, and selects one from the first phase wire input terminal and the third phase wire input terminal to conduct with the first phase wire output terminal according to the load power supply information to achieve single-phase load balanced allocation under the three-phase three-wire system architecture.

[0060] In this embodiment, the main control circuit 4 implements a three-phase five-wire power supply mode, a three-phase three-wire power supply mode, single-phase load balancing allocation under the three-phase five-wire architecture, and single-phase load balancing allocation under the three-phase three-wire architecture according to the power supply control request and the load power supply information, improving the power supply flexibility to adapt to complex power consumption requirements.

[0061] This embodiment provides a power supply control system, including a signal acquisition module 5 and the above-mentioned power supply control circuit; the signal acquisition module 5 is connected to the power supply control circuit and is used to connect to five power supply input ends 1 to acquire the load power supply information.

[0062] In one embodiment, the signal acquisition module 5 includes a current transformer and a voltage transformer connected to the input phase wire.

[0063] This embodiment provides a charging pile, including the above-mentioned power supply control system.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A power supply control circuit, characterized in that: It includes five power supply input terminals, five power supply output terminals, a switch control network and a main control circuit; The input end of the switch control network is connected to the five-way power supply input end, and the output end of the switch control network is connected to the five-way power supply output end; the five-way power supply input end includes 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 includes 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 is connected to the switch control network, and is used to obtain a power supply control request and load power supply information, and according to the power supply control request and the load power supply information, control the switch control network to turn on at least part of the five power supply input terminals and the five power supply output terminals to enter a three-phase power supply mode or a single-phase balanced power supply mode.

2. The power supply control circuit according to claim 1, characterized in that: 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 to 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 to the third phase line output end and the second phase line output end; The input end of the second switch control circuit is connected to 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 to the first phase line output end; The input end of the third switch control circuit is connected to the second phase line input end and the neutral line input end, and the output end of the third switch control circuit is connected to the neutral line output end; The input end of the fourth switch control circuit is connected to the protection ground line input end, and the output end of the fourth switch control circuit is connected to the protection ground line output end; The main control circuit is respectively connected to a control end of the first switch control circuit, a control end of the second switch control circuit, a control end of the third switch control circuit, and a control end of the fourth switch control circuit.

3. The power supply control circuit according to claim 2, characterized in that: The first switch control circuit includes a first switch circuit and a second switch circuit; The first end of the first switch circuit is connected to the first phase line input end, and the second end of the first switch circuit is connected to the third phase line output end; A first end of the second switch circuit is connected to the second phase line input end, and a second end of the second switch circuit is connected to the second phase line output end; The main control circuit is connected to the control end of the first switch circuit and the control end of the second switch circuit respectively.

4. The power supply control circuit according to claim 2, characterized in that: The second switch control circuit includes a third switch circuit, a fourth switch circuit and a fifth switch circuit; A first end of the third switch circuit is connected to the first phase line input end, and a second end of the third switch circuit is connected to the first phase line output end; A first end of the fourth switch circuit is connected to the second phase line input end, and a second end of the fourth switch circuit is connected to the first phase line output end; A first end of the fifth switch circuit is connected to the third phase line input end, and a second end of the fifth switch circuit is connected to the first phase line output end; The main control circuit is respectively connected to 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.

5. The power supply control circuit according to claim 2, characterized in that: The third switch control circuit includes a sixth switch circuit and a seventh switch circuit; The first end of the sixth switch circuit is connected to the second phase line input end, and the second end of the sixth switch circuit is connected to the neutral line output end; The first end of the seventh switch circuit is connected to the neutral line input end, and the second end of the seventh switch circuit is connected to the neutral line output end; The main control circuit is connected to the control end of the sixth switch circuit and the control end of the seventh switch circuit respectively.

6. The power supply control circuit according to claim 2, characterized in that: The third switch control circuit includes an eighth switch circuit; The first end of the eighth switch circuit is connected to the protection ground line input end, the second end of the eighth switch circuit is connected to the protection ground line output end, and the control end of the eighth switch circuit is connected to the main control circuit.

7. A power supply control method, characterized in that: A main control circuit used in the power supply control circuit according to any one of claims 1 to 6, comprising: Obtain power supply control request and load power supply information; If the power supply control request is a first control request, control the switch control network to connect the first phase line input terminal and the third phase line output terminal, connect the second phase line input terminal and the second phase line output terminal, connect the third phase line input terminal and the first phase line output terminal, connect the neutral line input terminal and the neutral line output terminal, and connect the protection ground line input terminal and the protection ground line output terminal; If the power supply control request is a second control request, control the switch control network to connect the first phase line input terminal and the third phase line output terminal, connect the second phase line input terminal and the second phase line output terminal, connect the third phase line input terminal and the first phase line output terminal, disconnect the neutral line input terminal and the neutral line output terminal, and disconnect the protective ground line input terminal and the protective ground line output terminal; If the power supply control request is a third control request, control the switch control network to disconnect the first phase line input terminal and the third phase line output terminal, disconnect the second phase line input terminal and the second phase line output terminal, connect the neutral line input terminal and the neutral line output terminal, and connect the protective ground line input terminal and the protective ground line output terminal, and select one from the first phase line input terminal, the second phase line input terminal and the third phase line input terminal to be connected to the first phase line output terminal according to the load power supply information; If the power supply control request is the fourth control request, the switch control network is controlled to disconnect the first phase line input terminal and the third phase line output terminal, disconnect the second phase line input terminal and the second phase line output terminal, disconnect the neutral line input terminal and the neutral line output terminal, disconnect the protective ground line input terminal and the protective ground line output terminal, turn on the second phase line input terminal and the neutral line output terminal, and select one from the first phase line input terminal and the third phase line input terminal to be turned on with the first phase line output terminal according to the load power supply information.

8. A power supply control system, characterized in that: It comprises a signal acquisition module and a power supply control circuit as described in any one of claims 1 to 6; the signal acquisition module is connected to the power supply control circuit, and is used to connect five power supply input terminals to collect load power supply information.

9. The power supply control system according to claim 8, characterized in that: The signal acquisition module includes a current transformer and a voltage transformer connected to the input phase line.

10. A charging pile, characterized in that: Comprising the power supply control system as claimed in claim 8 or 9.

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