Power supply circuit and power system

Abstract

A power system, comprising a power supply circuit. The power supply circuit comprises: a bus, the bus being adapted to be connected to an alternating current source; a first converter; and a power supply distribution circuit, the power supply distribution circuit being adapted to be connected to the bus, the first converter, a first direct current source and a terminal.

Description

Power supply circuits and power systems Technical Field

[0001] This disclosure relates to the field of power supply technology, and in particular to a power supply circuit and a power system. Background Technology

[0002] In related technologies, when powering multiple charging piles from different power sources, the power supply circuit layout in the power system is usually as follows: each power source is configured with a dedicated converter (such as a DC-DC converter and an AC-DC converter) for functions such as voltage conversion (e.g., boost, buck), power isolation, improving power efficiency, and matching power supply and load. This results in low utilization of electronic components in the power supply circuit. At the same time, setting up multiple dedicated converters makes the power supply circuit structure complex. Summary of the Invention

[0003] The purpose of this disclosure is to provide a power supply circuit and a power system, which aims to solve the problems of low utilization rate and complex structure of electronic components in the power supply circuit of the power system.

[0004] To achieve the above objectives, the present disclosure adopts the following technical solution:

[0005] In a first aspect, this disclosure provides a power supply circuit, comprising: a busbar adapted to connect to an AC source; a first converter; and a power distribution circuit adapted to connect the busbar, the first converter, a first DC source, and a terminal.

[0006] In the power supply circuit provided in this embodiment, when both an AC source and a first DC source are provided in the power system to supply power to the terminal, a power distribution circuit is set up to connect the bus, the first converter, the first DC source, and the terminal. The power distribution circuit can realize the reuse of the first converter in the power supply circuit by the first DC source and the AC source under different conduction states. It is not necessary to configure dedicated converters for the first DC source and the AC source in the power supply circuit, which improves the utilization rate of electronic components in the power supply circuit, simplifies the structure of the power supply circuit, reduces the difficulty of layout and wiring in the design process of the power supply circuit, and thus reduces the manufacturing cost of the power supply circuit. At the same time, the power distribution circuit can also realize bidirectional energy flow between the AC source, the first DC source, and the terminal, realize the complementarity between power sources, and enhance the stability and reliability of the power supply system.

[0007] In some embodiments, the power distribution circuit is configured to connect the first converter to any two of the bus, the first DC source, and the terminal.

[0008] In some embodiments, the power distribution circuit includes a plurality of switching elements, a bus, a first DC source, and a terminal adapted to connect at least one of the plurality of switching elements; the power distribution circuit is configured to connect the first converter to the bus and the terminal when at least one of the plurality of switching elements is turned on; or, connect the first converter to the first DC source and the terminal; or, connect the bus and the first DC source; or, connect the first converter to the bus and the first DC source.

[0009] In some embodiments, the power distribution circuit includes: a first switching element, a first end of which is connected to a second end of a first converter, and the second end of which is adapted to be connected to a first DC source; a second switching element, a first end of which is connected to a first end of the first converter, and the second end of which is adapted to be connected to a terminal; and a third switching element, a first end of which is connected to a bus, and the second end of which is connected to a second end of the first converter.

[0010] In some embodiments, the power distribution circuit is configured to connect the first converter to the bus and the terminal when the second switching element and the third switching element are turned on; or, when the first switching element and the second switching element are turned on, connect the first converter to the first DC source and the terminal.

[0011] In some embodiments, the power supply circuit further includes a second converter; a first end of the second converter is adapted to connect to an AC source, and a second end of the second converter is connected to a bus.

[0012] In some embodiments, the power distribution circuit is configured to connect the bus to the first DC source when the first switching element and the third switching element are turned on.

[0013] In some embodiments, the power distribution circuit further includes a fourth switching element; a first end of the fourth switching element is connected to the bus, and a second end of the fourth switching element is connected to the first end of the first converter.

[0014] In some embodiments, the power distribution circuit is configured to connect the first converter to the bus and the first DC source when the first switching element and the fourth switching element are turned on.

[0015] In some embodiments, the power supply circuit further includes a third converter; a first end of the third converter is connected to a bus, and a second end of the third converter is adapted to connect to a terminal.

[0016] In some embodiments, the power distribution circuit further includes a fifth switching element; a first end of the fifth switching element is connected to a second end of the first converter, and the second end of the fifth switching element is adapted to be connected to a second DC source.

[0017] In some embodiments, the power distribution circuit is configured to connect the first converter to the second DC source and the terminal when the second and fifth switching elements are turned on; or, when the fourth and fifth switching elements are turned on, connect the first converter to the bus and the second DC source; or, when the third and fifth switching elements are turned on, connect the bus to the second DC source.

[0018] In some embodiments, the power distribution circuit further includes a sixth switching element and a seventh switching element; a first end of the sixth switching element is connected to a second end of the second switching element, and the second end of the sixth switching element is adapted to connect to a terminal; a first end of the seventh switching element is adapted to connect to a second DC source, and the second end of the seventh switching element is connected to the first end of the sixth switching element.

[0019] In some embodiments, the power distribution circuit is configured to connect the first converter to the first DC source and the second DC source when the first switching element, the second switching element, and the seventh switching element are turned on; or, when the fifth switching element, the fourth switching element, and the seventh switching element are turned on, the bus and the second DC source are connected through the first converter, and the bus and the second DC source are connected through the third converter.

[0020] In some embodiments, the power supply circuit further includes a fourth converter; a first terminal of the fourth converter is connected to a second terminal of a fifth switching element, and the second terminal of the fourth converter is adapted to be connected to a second DC source.

[0021] In some embodiments, the power distribution circuit further includes an eighth switching element; the first end of the eighth switching element is connected to the bus, and the second end of the eighth switching element is connected to the first end of the fourth converter.

[0022] In some embodiments, the power distribution circuit is configured to connect the fourth converter to the bus and the second DC source when the eighth switching element is turned on; or, when the first switching element and the fifth switching element are turned on, connect the fourth converter to the first DC source and the second DC source.

[0023] In some embodiments, the power distribution circuit further includes a ninth switching element; the first end of the ninth switching element is connected to the first end of the fourth converter, and the second end of the ninth switching element is adapted to connect to a terminal.

[0024] In some embodiments, the power distribution circuit is configured to connect the fourth converter to the second DC source and the terminal when the ninth switching element is turned on.

[0025] In some embodiments, the power distribution circuit further includes a tenth switching element and an eleventh switching element; the first end of the tenth switching element is connected to the second end of the fourth converter, and the second end of the tenth switching element is adapted to be connected to a second DC source; the first end of the eleventh switching element is connected to a bus, and the second end of the eleventh switching element is connected to the second end of the fourth converter.

[0026] In some embodiments, the power distribution circuit is configured to connect the second DC source to the bus when the tenth and eleventh switching elements are turned on; or, to connect the fourth converter to the bus and the second DC source when the eighth and tenth switching elements are turned on; or, to connect the fourth converter to the bus and the terminal when the ninth and eleventh switching elements are turned on.

[0027] In some embodiments, the power supply circuit includes a plurality of first converters, a plurality of power distribution circuits, and an input distribution circuit, wherein the plurality of first converters correspond one-to-one with the plurality of power distribution circuits; each power distribution circuit is adapted to connect a bus, a first converter corresponding to each power distribution circuit, a first DC source corresponding to each power distribution circuit, and a terminal corresponding to each power distribution circuit; the input distribution circuit includes a plurality of first input switching elements, wherein the plurality of first input switching elements correspond one-to-one with the plurality of power distribution circuits and a plurality of terminals, wherein a first end of each first input switching element is connected to the power distribution circuit corresponding to each first input switching element, and a second end of each first input switching element is adapted to connect to the terminal corresponding to each first input switching element.

[0028] In some embodiments, the input distribution circuit is configured to connect the terminal corresponding to the target first input switch element to the power supply distribution circuit corresponding to the target first input switch element when the target first input switch element is turned on.

[0029] In some embodiments, the input distribution circuit further includes a plurality of second input switching elements; a second input switching element is connected between the first terminals of any two first input switching elements; the input distribution circuit is configured to connect a target terminal to at least one power distribution circuit, wherein the target terminal is any one of the plurality of terminals.

[0030] In some embodiments, the power supply circuit further includes a plurality of output distribution circuits, each of which corresponds to a plurality of first input switching elements and a plurality of terminals; each output distribution circuit includes a plurality of first output switching elements, each terminal includes a plurality of power supply ports, and the plurality of first output switching elements correspond to a plurality of power supply ports; the first end of each first output switching element is connected to the second end of the first input switching element corresponding to the output distribution circuit, and the second end of each first output switching element is adapted to be connected to the power supply port corresponding to each first output switching element.

[0031] In some embodiments, the output distribution circuit is configured to connect the power supply port corresponding to the target first output switch element to the first input switch element corresponding to the target first output switch element when the target first output switch element is turned on.

[0032] In some embodiments, the output distribution circuit further includes a plurality of second output switching elements; a second output switching element is connected between the first terminals of any two first output switching elements; the output distribution circuit is configured to connect a target power supply port corresponding to the output distribution circuit to at least one power supply distribution circuit, wherein the target power supply port is any one of the plurality of power supply ports corresponding to each output distribution circuit.

[0033] In some embodiments, the power supply circuit includes multiple buses, multiple first converters, multiple power distribution circuits, and bus connection circuits. Each bus corresponds one-to-one with a single first converter and each bus corresponds one-to-one with a single power distribution circuit. Each bus is also adapted to connect to an AC source corresponding to that bus. Each power distribution circuit is adapted to connect to a bus, a first converter, a first DC source, and a terminal corresponding to that power distribution circuit. The bus connection circuit is adapted to connect multiple AC sources and multiple buses. The bus connection circuit includes multiple first bus switching elements, each corresponding one-to-one with a single bus. A first end of each first bus switching element is adapted to connect to an AC source corresponding to that first bus switching element, and a second end of each first bus switching element is connected to the bus corresponding to that first bus switching element.

[0034] In some embodiments, the bus connection circuit is configured to connect the AC source corresponding to the target first bus switch element to the bus corresponding to the target first bus switch element when the target first bus switch element is turned on.

[0035] In some embodiments, the bus connection circuit further includes a plurality of second bus switching elements, wherein a second bus switching element is connected between the second ends of any two first bus switching elements; the bus connection circuit is configured to connect a target AC source to at least one bus, wherein the target AC source is any one of the plurality of AC sources.

[0036] In some embodiments, the power supply circuit further includes a switching circuit adapted to connect multiple power distribution circuits and multiple terminals; the switching circuit includes multiple third input switching elements and multiple fourth input switching elements, the multiple third input switching elements corresponding one-to-one with the multiple power distribution circuits; the first end of each third input switching element is connected to the power distribution circuit corresponding to each third input switching element, the second end of each third input switching element is adapted to connect to the terminal corresponding to each third input switching element, and a fourth input switching element is connected between the first ends of any two third input switching elements; the switching circuit is configured to connect a target terminal to at least one power distribution circuit, the target terminal being any one of the multiple terminals.

[0037] In some embodiments, the AC source includes one or more of an AC power grid and an AC generator; when the AC source is connected to the bus, the AC source is used to provide AC power to the bus.

[0038] In some embodiments, the first DC source includes one or more of a photovoltaic power source, an energy storage power source, and a DC generator; when the first DC source is connected to the first target element, the first DC source is used to provide DC power to the first target element, and the first target element includes at least one of a bus, a terminal, and a second DC source.

[0039] In some embodiments, the first converter is a DC-DC converter; when the first converter is connected to a second target element, the first converter is used to boost or buck the DC power from the second target element, which is any one of a bus, a first DC source, and a second DC source.

[0040] In some embodiments, the second converter is an AC-DC converter; when the second converter is connected to an AC source and a bus, the second converter is used to convert AC power from the AC source into DC power and provide the converted DC power to the bus.

[0041] In some embodiments, the third converter is a DC-DC converter; when the third converter is connected to a third target element, the third converter is used to boost or buck the DC power from the third target element, which is either a bus or a second DC source.

[0042] In some embodiments, the second DC source includes one or more of a photovoltaic power source, an energy storage power source, and a DC generator; when the second DC source is connected to the fourth target element, the second DC source is used to provide DC power to the fourth target element, and the fourth target element includes at least one of a bus, a terminal, and a first DC source.

[0043] In some embodiments, the fourth converter is a DC-DC converter; when the fourth converter is connected to a fifth target element, the fourth converter is used to boost or buck the DC power from the fifth target element, which is any one of a bus, a first DC source, and a second DC source.

[0044] Secondly, this disclosure provides a power system including an AC source, a first DC source, and a power supply circuit as provided in any of the above embodiments. The power supply circuit is connected to the AC source and the first DC source, and is adapted to connect to a terminal.

[0045] The power system described above has the same structure and beneficial technical effects as the power supply circuits provided in some of the above embodiments, and will not be described again here. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 is a structural block diagram of a power system;

[0048] Figure 2 is a circuit structure topology diagram of a power supply circuit provided in an embodiment of this disclosure;

[0049] Figure 3 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure;

[0050] Figure 4 is a current flow diagram based on the power supply circuit shown in Figure 3;

[0051] Figure 5 shows another current flow diagram based on the power supply circuit shown in Figure 3;

[0052] Figure 6 shows another current flow diagram based on the power supply circuit shown in Figure 3;

[0053] Figure 7 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure;

[0054] Figure 8 is a current flow diagram based on the power supply circuit shown in Figure 7;

[0055] Figure 9 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure;

[0056] Figure 10 is a current flow diagram based on the power supply circuit shown in Figure 9;

[0057] Figure 11 shows another current flow diagram based on the power supply circuit shown in Figure 9;

[0058] Figure 12 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure;

[0059] Figure 13 is a current flow diagram based on the power supply circuit shown in Figure 12;

[0060] Figure 14 shows another current flow diagram based on the power supply circuit shown in Figure 12;

[0061] Figure 15 shows another current flow diagram based on the power supply circuit shown in Figure 12;

[0062] Figure 16 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure;

[0063] Figure 17 is a current flow diagram based on the power supply circuit shown in Figure 16;

[0064] Figure 18 shows another current flow diagram based on the power supply circuit shown in Figure 16;

[0065] Figure 19 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure;

[0066] Figure 20 is a current flow diagram based on the power supply circuit shown in Figure 19;

[0067] Figure 21 is a current flow diagram based on the power supply circuit shown in Figure 19;

[0068] Figure 22 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure;

[0069] Figure 23 is a current flow diagram based on the power supply circuit shown in Figure 22;

[0070] Figure 24 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure;

[0071] Figure 25 is a current flow diagram based on the power supply circuit shown in Figure 24;

[0072] Figure 26 shows another current flow diagram based on the power supply circuit shown in Figure 24;

[0073] Figure 27 shows another current flow diagram based on the power supply circuit shown in Figure 24;

[0074] Figure 28 shows another current flow diagram based on the power supply circuit shown in Figure 24;

[0075] Figure 29 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure;

[0076] Figure 30 is a circuit topology diagram of an input distribution circuit provided in an embodiment of this disclosure;

[0077] Figure 31 is a circuit structure topology diagram of another input distribution circuit provided in an embodiment of this disclosure;

[0078] Figure 32 is a current flow diagram based on the input distribution circuit shown in Figure 31;

[0079] Figure 33 is a circuit structure topology diagram of an output distribution circuit provided in an embodiment of this disclosure;

[0080] Figure 34 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure;

[0081] Figure 35 is a circuit structure topology diagram of a switching circuit provided in an embodiment of this disclosure;

[0082] Figure 36 is a structural block diagram of a power system provided in an embodiment of this disclosure.

[0083] Reference numerals: Power system 100; AC source 110; DC source 120; Terminal 130; Power supply circuit 200; DC bus 201; First DC-DC converter 202; Second DC-DC converter 203; AC-DC converter 204; First disconnecting device 205; Second disconnecting device 206; Bus 210; First converter 220; Power distribution circuit 230; First DC source 121; Second DC source 122; Second converter 240; Third converter 250; Fourth converter 260; First switching element S1; Second switching element S2; Third switching element S3; Fourth switching element S4; Fifth switching element S5; Sixth switching element S6; Seventh switching element S7; Eighth switching element S8; Ninth switching element S9; Tenth switching element S10; Eleventh switching element S11; Input distribution circuit 300; First input switching element S31; Second input switching element S32; Power supply port 131; Output distribution circuit 400; first output switching element S41; second output switching element S42; bus connection circuit 500; first bus switching element S51; second bus switching element S52; switching circuit 600; third input switching element S61; fourth input switching element S62. Detailed Implementation

[0084] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0085] In the description of this disclosure, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in practical applications, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0086] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0087] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a communication between the internal components of two elements. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0088] In embodiments of this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0089] In this disclosure, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or illustration. Any embodiment or design described as "exemplary" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0090] In related technologies, as shown in Figure 1, which is a structural block diagram of a power system, the power system 100 includes an AC source 110, a DC source 120, a terminal 130, and a power supply circuit 200.

[0091] The power supply circuit 200 is used to connect the AC source 110, the DC source 120, and the terminal 130. The power supply circuit 200 is configured to enable the AC source 110 to conduct to the terminal 130, the DC source 120, and the terminal 130 in the power system 100, thereby enabling the AC source 110 and / or the DC source 120 to supply power to the terminal 130. The power supply circuit 200 includes a DC bus 201, a first DC-DC converter 202, a second DC-DC converter 203, an AC-DC converter 204, a first disconnecting device 205, and a second disconnecting device 206. The AC source 110 includes, but is not limited to, one or more of an AC power grid and an AC generator; the DC source 120 includes, but is not limited to, one or more of a photovoltaic power source, an energy storage power source, and a DC generator; the terminal 130 includes, but is not limited to, a charging assembly for charging one or more electric vehicles, including, but not limited to, a charging pile, a charging circuit, and a charging interface. Among them, the charging pile, as the direct charging equipment, is responsible for obtaining electrical energy from the power grid and transmitting it to the electric vehicle; the charging circuit includes the connecting cable between the charging pile and the electric vehicle, as well as the circuit inside the electric vehicle responsible for transmitting electrical energy to the power battery of the electric vehicle; the charging interface is the physical connection component between the charging pile and the electric vehicle.

[0092] Specifically, a first DC-DC converter 202 is provided between terminal 130 and DC bus 201. This DC-DC converter performs functions such as voltage conversion (e.g., boost, buck), power isolation, improved power efficiency, and matching of power supply and load. A first disconnecting device 205 and an AC-DC converter 204 are provided between AC source 110 and DC bus 201. The AC-DC converter 204 performs functions such as converting AC to DC, power isolation, improved power efficiency, and matching of power supply and load. A second disconnecting device 206 and a second DC-DC converter 203 are provided between DC source 120 and DC bus 201. Because dedicated converters are provided for both AC source 110 and DC source 120 in the power supply circuit 200, the utilization rate of these converters is low, resulting in a complex structure for the power supply circuit 200.

[0093] Optionally, when the first disconnecting device 205 is turned on, the AC power output from the AC source 110 is converted into DC power by the first disconnecting device 205 and the AC-DC converter 204 and output to the DC bus 201. The DC power transmitted to the DC bus 201 is converted into a power supply voltage that meets the requirements of the terminal 130 after voltage conversion by the first DC-DC converter 202, so as to realize the AC source 110 to supply power to the terminal 130.

[0094] When the second disconnecting device 206 is turned on, the DC power output from the DC source 120 is converted by the second disconnecting device 206, the second DC-DC converter 203, and the first DC-DC converter 202 to form a power supply voltage that meets the requirements of the terminal 130, so as to realize the power supply from the DC source 120 to the terminal 130. Since the DC power received by the DC bus 201 is converted by the AC source 110 through the AC-DC converter 204, the terminal 130 also needs to be equipped with the first DC-DC converter 202 for voltage conversion to meet the power supply voltage requirements of the terminal 130. However, this will result in the DC source 120 needing to go through two conversions to supply power to the terminal 130, namely the second DC-DC converter 203 and the first DC-DC converter 202, resulting in higher energy loss when the DC source 120 supplies power to the terminal 130.

[0095] Furthermore, the power supply circuit 200 adopts a single DC bus 201 circuit architecture. If a short circuit occurs in the power supply circuit 200, causing an overload current in the DC bus 201, the single DC bus 201 architecture cannot guarantee the safe use of the power system 100 where the power supply circuit 200 is located, resulting in poor stability of the power system 100.

[0096] Against this backdrop, in order to address the problems of low utilization rate and complex structure of electronic components in the power supply circuit 200 of the power system 100 in the related art, this disclosure provides a power supply circuit 200 and a power system 100. The implementation methods of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings.

[0097] In some embodiments, as shown in FIG2, FIG2 is a circuit structure topology diagram of a power supply circuit provided in an embodiment of the present disclosure. The power supply circuit provided in this disclosure connects an AC source 110, a first DC source 121, and a terminal 130.

[0098] The configuration of the power supply circuit is described below. The power supply circuit provided in this embodiment includes at least a bus 210, a first converter 220, and a power distribution circuit 230.

[0099] In this embodiment, bus 210 is adapted to connect AC source 110, which supplies power to bus 210, and the number of AC sources 110 connected to bus 210 is at least one. Power distribution circuit 230 is adapted to connect bus 210, first converter 220, first DC source 121, and terminal 130, and the power supply circuit is used to enable conduction between any two of AC source 110, first DC source 121, and terminal 130.

[0100] In some embodiments, as shown in FIG2, the first converter 220 is a DC-DC converter. The first converter 220 in the power supply circuit is used to convert the DC power output from the bus 210 or the first DC source 121 to the terminal 130, or to convert the DC power output from the first DC source 121 to the bus 210, or to convert the DC power output from the bus 210 to the first DC source 121.

[0101] In one implementation, the power distribution circuit 230 includes multiple switching elements. The bus 210, the first DC source 121, and the terminal 130 are adapted to connect at least one of the multiple switching elements. By controlling the conduction state of the multiple switches in the power distribution circuit 230, the power distribution circuit 230 can be configured to connect the first converter 220 to the bus 210 and the terminal 130 when at least one of the multiple switching elements is turned on; or, connect the first converter 220 to the first DC source 121 and the terminal 130; or, connect the bus 210 and the first DC source 121. The switching elements can be mechanical switches, diodes, transistors, field-effect transistors, or other components used to achieve circuit conduction.

[0102] In related technologies, to connect bus 210 to terminal 130, or bus 210 to the first DC source 121, converters are required between bus 210 and terminal 130, as well as between bus 210 and the first DC source 121. However, there is a problem of low converter utilization during power supply. For example, when bus 210 is connected to the first DC source 121, the converter between bus 210 and terminal 130 is idle. Thus, because a large number of converters are required in the power supply circuit, but their utilization is low, there may be redundancy in the converter configuration, resulting in greater difficulty in circuit layout and wiring, and higher manufacturing costs for the power supply circuit.

[0103] In one embodiment, when powering the terminal 130, by controlling the conduction state of multiple switching elements in the power distribution circuit 230, the power distribution circuit 230 can be configured to connect the first converter 220 to the bus 210 and the terminal 130, so that the AC source 110 connected to the bus 210 supplies power to the terminal 130; and the power distribution circuit 230 can also be configured to connect the first converter 220 to the first DC source 121 and the terminal 130, so that the first DC source 121 supplies power to the terminal 130.

[0104] Based on this, when both AC source 110 and first DC source 121 are provided in the power system, a power distribution circuit 230 is set up between bus 210, terminal 130, first DC source 121 and first converter 220. This allows the components connected to the other end of the first converter 220 to switch between bus 210 and first DC source 121 when one end of the first converter 220 is connected to terminal 130. This enables the reuse of the first converter 220, allowing it to be used for voltage boosting or bucking when bus 210 is connected to the first DC source 121 or terminal 130. This eliminates the need to configure dedicated converters for both the first DC source 121 and AC source 110 in the power supply circuit, improving the utilization rate of converters in the power supply circuit. Furthermore, it simplifies the structure of the power supply circuit, reduces the difficulty of layout and wiring in the power supply circuit design process, and thus reduces the manufacturing cost of the power supply circuit.

[0105] In another implementation, when supplying power to bus 210, it can be supplied not only through AC source 110, but also by controlling the conduction state of multiple switching elements in power distribution circuit 230. Power distribution circuit 230 can be configured to connect bus 210 to first DC source 121, so that first DC source 121 supplies power to bus 210.

[0106] In another implementation, when supplying power to the first DC source 121, the power distribution circuit 230 can be configured to connect the first DC source 121 to the bus 210 by controlling the conduction state of multiple switching elements in the power distribution circuit 230, so that the AC source 110 connected to the bus 210 supplies power to the first DC source 121. For example, if the AC source 110 is an AC power grid and the first DC source 121 is an energy storage power source, and the remaining power of the energy storage power source is lower than a preset value, the AC power grid can charge the energy storage power source when the connection between the energy storage power source and the bus 210 in the power distribution circuit 230 is connected. Thus, the AC source 110 can directly supply power to the first DC source 121 without voltage conversion by the first converter 220, thereby greatly reducing energy loss when the AC source 110 supplies power to the first DC source 121. Furthermore, the first DC source 121 can also supply power to the bus 210 after voltage conversion by the first converter 220, so that bidirectional energy flow can be realized between the AC source 110, the first DC source 121 and the terminal 130.

[0107] In this embodiment, when the power system simultaneously provides AC source 110 and first DC source 121 to supply power to terminal 130, by controlling the conduction state of multiple switching elements in power distribution circuit 230, the first converter 220 in the power supply circuit can be reused by the first DC source 121 and AC source 110. This eliminates the need to configure dedicated converters for both the first DC source 121 and AC source 110 in the power supply circuit, thereby improving the utilization rate of electronic components in the power supply circuit, simplifying the structure of the power supply circuit, reducing the difficulty of layout and wiring in the power supply circuit design process, and thus reducing the manufacturing cost of the power supply circuit. At the same time, the power distribution circuit 230 can also realize bidirectional energy flow between AC source 110, first DC source 121 and terminal 130. Since different power sources have different characteristics, bidirectional energy flow can realize the complementarity between power sources, thereby enhancing the stability and reliability of the power supply system.

[0108] As shown in Figure 3, Figure 3 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure. The power supply circuit provided in this embodiment includes at least a bus 210, a first converter 220, and a power distribution circuit 230.

[0109] In this embodiment, the power distribution circuit 230 includes at least a first switching element S1, a second switching element S2, and a third switching element S3. The first terminal of the first switching element S1 is connected to the second terminal of the first converter 220, and the second terminal of the first switching element S1 is adapted to connect to the first DC source 121. The first terminal of the second switching element S2 is connected to the first terminal of the first converter 220, and the second terminal of the second switching element S2 is adapted to connect to the terminal 130. The first terminal of the third switching element S3 is connected to the bus 210, and the second terminal of the third switching element S3 is connected to the second terminal of the first converter 220.

[0110] In some embodiments, as shown in FIG3, the power supply circuit further includes a second converter 240. A first terminal of the second converter 240 is adapted to connect to the AC source 110, and a second terminal of the second converter 240 is connected to the bus 210. In this embodiment, the bus 210 is a DC bus, and the second converter 240 used to connect the AC source 110 and the DC bus 210 is an AC-DC converter. The second converter 240 in the power supply circuit is used to convert the AC power output from the AC source 110 into DC power and then output it to the bus 210.

[0111] In one implementation, as shown in Figure 4, which is a current flow diagram according to the power supply circuit shown in Figure 3, the power supply distribution circuit 230 can be configured to connect the first converter 220 to the bus 210 and the terminal 130 by controlling the conduction of the second switching element S2 and the third switching element S3 in the power supply distribution circuit 230 between the AC source 110 and the terminal 130.

[0112] Specifically, the AC power output from AC source 110 is converted into DC power by the second converter 240 and transmitted to bus 210. The DC power provided by AC source 110 on bus 210 is transmitted to terminal 130 after passing through the third switching element S3, the voltage conversion of the first converter 220 and the second switching element S2, so as to realize the power supply of AC source 110 to terminal 130.

[0113] As shown in Figure 5, Figure 5 is another current flow diagram according to the power supply circuit shown in Figure 3. Between the first DC source 121 and the terminal 130, by controlling the first switching element S1 and the second switching element S2 in the power distribution circuit 230 to be turned on, the power distribution circuit 230 can be configured to connect the first converter 220 with the first DC source 121 and the terminal 130.

[0114] Specifically, the DC power output from the first DC source 121 is transmitted to the terminal 130 after passing through the first switching element S1, the voltage conversion of the first converter 220, and the second switching element S2, so as to realize the power supply of the terminal 130 by the first DC source 121.

[0115] Thus, as shown in Figures 4 and 5, by controlling the conduction of multiple switching elements in the power distribution circuit 230, the power supply to the terminal 130 can be switched between the first DC source 121 and the AC source 110 while sharing the first converter 220. This eliminates the need to configure dedicated converters for both the first DC source 121 and the AC source 110 in the power supply circuit, thereby improving the utilization rate of the converter in the power supply circuit and simplifying the structure of the power supply circuit.

[0116] In one implementation, as shown in Figure 6, which is another current flow diagram based on the power supply circuit shown in Figure 3, the power supply distribution circuit 230 can be configured to connect the first DC source 121 to the bus 210 by controlling the first switching element S1 and the third switching element S3 in the power supply distribution circuit 230 to conduct between the AC source 110 and the first DC source 121.

[0117] Specifically, the AC power output from AC source 110 is converted into DC power by the second converter 240 and transmitted to bus 210. The DC power provided by AC source 110 on bus 210 is then directly transmitted to the first DC source 121 after passing through the third switching element S3 and the first switching element S1, thus enabling AC source 110 to supply power to the first DC source 121. In this way, when the first DC source 121 is an energy storage power source, and the DC power converted by the second converter 240 meets the power supply voltage requirements of the first DC source 121, the converter will experience energy loss due to internal resistance and electromagnetic conversion during operation. By controlling the conduction of multiple switching elements in the power distribution circuit 230, the first DC source 121 can be directly connected to bus 210 without going through the first converter 220. At this time, AC source 110 can directly supply power to the first DC source 121 without the voltage conversion of the first converter 220, thereby improving the energy utilization rate when AC source 110 supplies power to the first DC source 121.

[0118] As shown in Figure 7, Figure 7 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure. The power supply circuit provided in this embodiment includes at least a bus 210, a first converter 220, a power distribution circuit 230, and a second converter 240, and the power distribution circuit 230 includes at least a first switching element S1, a second switching element S2, and a third switching element S3.

[0119] In this embodiment, the power distribution circuit 230 further includes a fourth switching element S4, the first end of which is connected to the bus 210, and the second end of which is connected to the first end of the first converter 220.

[0120] In one embodiment, the power distribution circuit 230 can be configured to connect the first converter 220 to the first DC source 121 and the bus 210, so that the DC power output from the bus 210 is converted by the first converter 220 to supply power to the first DC source 121. Since the first converter 220 can boost or buck the voltage when performing voltage conversion, the range of the supply voltage when the bus 210 supplies power to the first DC source 121 is effectively expanded.

[0121] In one implementation, when the first DC source 121 is an energy storage power source, the AC source 110 can directly supply power to the first DC source 121 without voltage conversion by the first converter 220, thereby reducing energy loss when power is supplied between the AC source 110, the first DC source 121, and the terminal 130. Alternatively, the power can be supplied to the first DC source 121 after voltage conversion by the first converter 220, thereby effectively increasing the supply voltage range of the electronic components when realizing bidirectional energy flow between them.

[0122] In one implementation, as shown in Figure 8, which is a current flow diagram according to the power supply circuit shown in Figure 7, the power supply distribution circuit 230 can be configured to connect the first converter 220 to the first DC source 121 and the bus 210 by controlling the fourth switching element S4 and the first switching element S1 in the power supply distribution circuit 230 to conduct between the AC source 110 and the first DC source 121.

[0123] Specifically, the AC power output from AC source 110 is converted into DC power by the second converter 240 and transmitted to bus 210. The DC power supplied by AC source 110 on bus 210 is then transmitted to the first DC source 121 after passing through the fourth switching element S4, the voltage conversion of the first converter 220, and the first switching element S1, thus enabling AC source 110 to supply power to the first DC source 121. Furthermore, the DC power output from the first DC source 121 can supply power to bus 210 through the voltage conversion of the first converter 220. In this way, when the DC power output from bus 210 supplies power to the first DC source 121 after voltage conversion by the first converter 220, the range of the supply voltage when bus 210 supplies power to the first DC source 121 can be effectively expanded, and bidirectional energy flow can be achieved between bus 210 and the first DC source 121.

[0124] In this embodiment, by controlling the conduction state of multiple switching elements in the power distribution circuit 230, the first converter 220 in the power supply circuit can be multiplexed by the first DC source 121 and the AC source 110, thereby improving the utilization rate of electronic components in the power supply circuit. When the AC source 110 supplies power to the first DC source 121, the AC source 110 does not need to go through the voltage conversion of the first converter 220 and can directly supply power to the first DC source 121. When the first DC source 121 supplies power to the terminal 130, the first DC source 121 only needs to go through the first converter 220 once to realize the power supply to the terminal 130. This not only realizes the bidirectional energy flow between the AC source 110, the first DC source 121 and the terminal 130, but also greatly reduces the energy loss when the AC source 110, the first DC source 121 and the terminal 130 are connected for power supply. Furthermore, when realizing bidirectional energy flow between electronic components, by connecting the first converter 220, since the first converter 220 can boost or buck the voltage during voltage conversion, the supply voltage range of electronic components can be effectively increased when realizing bidirectional energy flow between electronic components, thereby effectively improving the compatibility of the power supply circuit with electronic components.

[0125] As shown in Figure 9, Figure 9 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure. The power supply circuit provided in this embodiment includes at least a bus 210, a first converter 220, a power distribution circuit 230, and a second converter 240, and the power distribution circuit 230 includes at least a first switching element S1, a second switching element S2, a third switching element S3, and a fourth switching element S4.

[0126] In this embodiment, the power supply circuit also includes a third converter 250. The first end of the third converter 250 is connected to the bus 210, and the second end of the third converter 250 is adapted to connect to the terminal 130. The third converter 250 is a DC-DC converter. The second converter 240 in the power supply circuit converts the AC power output from the AC source 110 into DC power and outputs it to the bus 210. The DC power provided by the AC source 110 on the bus 210 is directly transmitted to the terminal 130 after voltage conversion by the third converter 250. This allows the AC source 110 to directly supply power to the terminal 130 after conversion by the second converter 240 and the third converter 250. Since the third converter 250 can boost or buck the voltage during voltage conversion, it increases the supply voltage range when supplying power to the terminal 130, making the power supply circuit adaptable to more types of terminals 130, thereby effectively improving the compatibility of the power supply circuit with the terminal 130.

[0127] In one implementation, for example, when AC source 110 is an AC power grid and the first DC source 121 is a photovoltaic power source or an energy storage power source, AC source 110 continuously supplies power to terminal 130. However, if the AC power grid is in peak electricity consumption, the supply voltage of AC source 110 to bus 210 may be lower than the rated value, resulting in an undervoltage state. In this case, the power distribution circuit 230 can be configured to connect the first converter 220, the first DC source 121, and terminal 130, so that the first DC source 121 can serve as a supplementary power source for terminal 130, thereby achieving complementarity between power sources and enhancing the stability and reliability of the power supply system.

[0128] As shown in Figure 10, Figure 10 is a current flow diagram based on the power supply circuit shown in Figure 9.

[0129] Specifically, between AC source 110 and terminal 130, the AC power output by AC source 110 is converted into DC power by second converter 240 and transmitted to bus 210. The DC power provided by AC source 110 on bus 210 is converted into voltage by third converter 250 and transmitted to terminal 130, so as to realize the power supply of AC source 110 to terminal 130.

[0130] Between the first DC source 121 and the terminal 130, by controlling the conduction of the first switching element S1 and the second switching element S2 in the power distribution circuit 230, the power distribution circuit 230 can be configured to connect the first converter 220 to the first DC source 121 and the terminal 130. The DC power output from the first DC source 121 is transmitted to the terminal 130 after passing through the first switching element S1, the voltage conversion of the first converter 220, and the second switching element S2, thereby realizing the power supply from the first DC source 121 to the terminal 130.

[0131] Thus, when AC source 110 supplies power to terminal 130, if AC source 110 is in an undervoltage state, the first DC source 121 can serve as a supplementary power source for terminal 130. The first DC source 121 and the undervoltage AC source 110 can simultaneously supply power to terminal 130, thereby achieving complementarity between power sources and ensuring the stability of the power supply at terminal 130. Furthermore, since the DC output of the first DC source 121 is directly output to terminal 130 after passing through the first converter 220, without needing to pass through the first converter 220, bus 210, and third converter 250 before being output, the first DC source 121 only needs to undergo one stage of conversion when supplying power to terminal 130, thereby greatly reducing the energy loss when the first DC source 121 supplies power to terminal 130.

[0132] In another implementation, for example, when AC source 110 is an AC grid and first DC source 121 is an energy storage power source or a photovoltaic power source, AC source 110 and first DC source 121 jointly supply power to terminal 130 to increase the power supply to terminal 130. However, if the remaining power of the energy storage power source is insufficient or the light intensity of the photovoltaic power source is insufficient, the supply voltage of first DC source 121 to terminal 130 is lower than the rated value and is in an undervoltage state. At this time, the power distribution circuit 230 can be configured to connect the first converter 220 to the bus 210 and the first DC source 121, so that AC source 110 can simultaneously supply power to terminal 130 through two branches: first converter 220 and third converter 250. This achieves complementarity between power sources and enhances the stability and reliability of the power supply system.

[0133] As shown in Figure 11, Figure 11 is another current flow diagram based on the power supply circuit shown in Figure 9.

[0134] Specifically, between AC source 110 and terminal 130, the AC power output by AC source 110 is converted into DC power by second converter 240 and transmitted to bus 210. The DC power provided by AC source 110 on bus 210 is converted into voltage by third converter 250 and transmitted to terminal 130.

[0135] Furthermore, by controlling the second switching element S2 and the third switching element S3 in the power distribution circuit 230 to be turned on, the power distribution circuit 230 can be configured to connect the first converter 220 with the bus 210 and the terminal 130. The DC power provided by the AC source 110 on the bus 210 is transmitted to the terminal 130 after passing through the third switching element S3, the voltage conversion of the first converter 220 and the second switching element S2 in sequence. This allows the AC source 110 to supply power to the terminal 130 simultaneously through the power supply branch where the first converter 220 is located and the power supply branch where the third converter 250 is located.

[0136] In this embodiment, by setting a first converter 220 and a third converter 250 in the power supply circuit, the power supply circuit can simultaneously supply power to the terminal 130 using two power supply branches: AC source 110 and first DC source 121. This improves the power supply power to the terminal 130. Furthermore, by controlling the conduction of multiple switching elements in the power distribution circuit 230, the power supply branch of the first converter 220 supplying power to the terminal 130 can switch between the first DC source 121 and the AC source 110. This not only ensures the stability of the power supply power at the terminal 130 but also avoids setting additional converters in the power supply circuit, thereby improving the utilization rate of the converters in the power supply circuit and simplifying the structure of the power supply circuit.

[0137] As shown in Figure 12, Figure 12 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure. The power supply circuit provided in this embodiment may include at least a bus 210, a first converter 220, a power distribution circuit, a second converter 240, and a third converter 250, and the power distribution circuit may include at least a first switching element S1, a second switching element S2, a third switching element S3, and a fourth switching element S4.

[0138] In this embodiment, the power distribution circuit also includes a fifth switching element S5. The first end of the fifth switching element S5 is connected to the second end of the first converter 220, and the second end of the fifth switching element S5 is adapted to be connected to the second DC source 122.

[0139] Optionally, the first DC source 121 and the second DC source 122 share the first converter 220. Furthermore, the power system may also include at least one DC source other than the first DC source 121 and the second DC source 122. Multiple DC sources are connected in parallel with the first converter 220, and a switching element is connected between each DC source and the first converter 220. It is not necessary to set converters at both the first DC source 121 and the second DC source 122. By controlling the conduction mode of the switch in the power distribution circuit, the DC source that transmits power to the first converter 220 can be switched between the first DC source 121 and the second DC source 122. This improves the utilization rate of the converter in the power supply circuit, simplifies the structure of the power supply circuit, reduces the difficulty of layout and wiring in the design process of the power supply circuit, and thus reduces the manufacturing cost of the power supply circuit.

[0140] Specifically, between the first DC source 121 and the bus 210, by controlling the conduction of the fourth switching element S4 and the first switching element S1 in the power distribution circuit, the power distribution circuit can be configured to connect the first converter 220 to the bus 210 and the first DC source 121. The DC power output from the first DC source 121 is transmitted to the bus 210 after passing through the first switching element S1, the voltage conversion of the first converter 220, and the fourth switching element S4, thereby realizing the power supply from the first DC source 121 to the bus 210. Alternatively, the DC power output from the bus 210 can be converted by the voltage of the first converter 220 to supply power to the first DC source 121, thereby effectively expanding the range of the supply voltage when the bus 210 supplies power to the first DC source 121, and enabling bidirectional energy flow between the bus 210 and the first DC source 121.

[0141] By controlling the third switching element S3 and the first switching element S1 in the power distribution circuit to be turned on, the power distribution circuit can be configured to connect the bus 210 to the first DC source 121. The AC source 110 can directly supply power to the first DC source 121 without going through the voltage conversion of the first converter 220, thereby improving the energy utilization rate of the AC source 110 when supplying power to the first DC source 121.

[0142] In one implementation, as shown in Figure 13, which is a current flow diagram based on the power supply circuit shown in Figure 12.

[0143] Between the second DC source 122 and the terminal 130, by controlling the second switching element S2 and the fifth switching element S5 in the power distribution circuit to be turned on, the power distribution circuit can be configured to connect the first converter 220 to the second DC source 122 and the terminal 130.

[0144] Specifically, the DC power output from the second DC source 122 is transmitted to the terminal 130 after passing through the fifth switching element S5, the voltage conversion of the first converter 220, and the second switching element S2, so as to realize the power supply of the terminal 130 by the fifth switching element S5.

[0145] In one implementation, as shown in Figure 14, which is another current flow diagram based on the power supply circuit shown in Figure 12.

[0146] Between the second DC source 122 and the bus 210, by controlling the conduction of the fourth switching element S4 and the fifth switching element S5 in the power distribution circuit, the power distribution circuit can be configured to connect the first converter 220 to the bus 210 and the second DC source 122. The DC power output from the second DC source 122 is transmitted to the bus 210 after passing through the fifth switching element S5, the voltage conversion of the first converter 220, and the fourth switching element S4, thereby realizing the power supply from the second DC source 122 to the bus 210. Alternatively, the DC power output from the bus 210 can be converted by the voltage of the first converter 220 to supply power to the second DC source 122, thereby effectively expanding the range of the supply voltage when the bus 210 supplies power to the second DC source 122, and enabling bidirectional energy flow between the bus 210 and the second DC source 122.

[0147] In one implementation, as shown in Figure 15, which is another current flow diagram based on the power supply circuit shown in Figure 12.

[0148] Between the second DC source 122 and the bus 210, the third switching element S3 and the fifth switching element S5 in the power distribution circuit can be turned on. The power distribution circuit can be configured to turn on the bus 210 and the second DC source 122, so that the AC source 110 can directly supply power to the second DC source 122 without going through the voltage conversion of the first converter 220, thereby improving the energy utilization rate when the AC source 110 supplies power to the second DC source 122.

[0149] As shown in Figure 16, Figure 16 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure. The power supply circuit provided in this embodiment may include at least a bus 210, a first converter 220, a power distribution circuit, a second converter 240, and a third converter 250, and the power distribution circuit may include at least a first switching element S1, a second switching element S2, a third switching element S3, a fourth switching element S4, and a fifth switching element S5.

[0150] In this embodiment, the multiple switching elements in the power distribution circuit may further include a sixth switching element S6 and a seventh switching element S7. The first end of the sixth switching element S6 is connected to the second end of the second switching element S2, and the second end of the sixth switching element S6 is adapted to connect to the terminal 130; the first end of the seventh switching element S7 is adapted to connect to the second DC source 122, and the second end of the seventh switching element S7 is connected to the first end of the sixth switching element S6.

[0151] For example, when the first DC source 121 is an energy storage power source and the second DC source 122 is a photovoltaic power source, the second DC source 122 can not only supply power to the terminal 130 or the bus 210, but also supply power to the first DC source 121 when the remaining power of the first DC source 121 is lower than a preset value. This realizes the adjustment of the energy flow mode in the power supply circuit, realizes the complementarity between power sources, and enhances the stability and reliability of the power supply system.

[0152] In one implementation, as shown in Figure 17, which is a current flow diagram based on the power supply circuit shown in Figure 16.

[0153] Between the first DC source 121 and the second DC source 122, by controlling the conduction of the first switching element S1, the second switching element S2, and the seventh switching element S7 in the power distribution circuit, the power distribution circuit can be configured to connect the first converter 220 to both the first DC source 121 and the second DC source 122. The DC power output from the second DC source 122 is transmitted to the first DC source 121 after passing through the seventh switching element S7, the second switching element S2, the voltage conversion of the first converter 220, and the first switching element S1, thereby enabling the second DC source 122 to supply power to the first DC source 121.

[0154] Thus, in the process of enabling the second DC source 122 to supply power to the first DC source 121, by controlling the conduction state of multiple switching elements in the power supply distribution circuit, the first converter 220 in the power supply circuit is reused, eliminating the need to set up an additional converter between the second DC source 122 and the first DC source 121, thereby improving the utilization rate of the converter in the power supply circuit.

[0155] In another implementation, as shown in Figure 18, which is another current flow diagram based on the power supply circuit shown in Figure 16.

[0156] Between the second DC source 122 and the bus 210, by controlling the fifth switching element S5, the fourth switching element S4, and the seventh switching element S7 in the power distribution circuit, the power distribution circuit can be configured to connect the first converter 220 to the bus 210 and the second DC source 122, and can also be configured to connect the third converter 250 to the bus 210 and the second DC source 122. The DC power output from the second DC source 122 is transmitted to the bus 210 after passing through the fifth switching element S5, the voltage conversion of the first converter 220, and the fourth switching element S4, and then through the seventh switching element S7 and the voltage conversion of the third converter 250, so that the second DC source 122 can simultaneously supply power to the bus 210 through the power supply branch where the first converter 220 is located and the power supply branch where the third converter 250 is located.

[0157] In this way, by using two power supply branches to supply power to the bus 210 simultaneously, the upper limit of the power supply of the second DC source 122 is increased, and the power supply power of the second DC source 122 to the bus 210 is improved. Furthermore, since the first converter 220 and the third converter 250 can also be reused by the second DC source 122, the number of converters set in the power supply circuit is reduced, thereby further improving the utilization rate of converters in the power supply circuit.

[0158] In this embodiment, when the first DC source 121 is provided with a first DC source 121 and a second DC source 122, the first DC source 121 and the second DC source 122 can reuse the first converter 220 to realize DC power transmission to the bus 210, the terminal 130 and between the two DC sources, which greatly improves the utilization rate of the converter in the power supply circuit. Furthermore, the second DC source 122 increases the upper limit of the power supply of the second DC source 122 by using two power supply branches to supply power to the bus 210 at the same time, thereby increasing the power supply power of the second DC source 122 to the bus 210.

[0159] As shown in Figure 19, Figure 19 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure. The power supply circuit provided in this embodiment may include at least a bus 210, a first converter 220, a power distribution circuit, a second converter 240, and a third converter 250, and the power distribution circuit may include at least a first switching element S1, a second switching element S2, a third switching element S3, a fourth switching element S4, and a fifth switching element S5.

[0160] In this embodiment, the power supply circuit further includes a fourth converter 260, which is a DC-DC converter. The first terminal of the fourth converter 260 is connected to the second terminal of the fifth switching element S5, and the second terminal of the fourth converter 260 is adapted to be connected to the second DC source 122.

[0161] Optionally, the multiple switching elements in the power distribution circuit may also include an eighth switching element S8, with the first end of the eighth switching element S8 connected to the bus 210 and the second end of the eighth switching element S8 connected to the first end of the fourth converter 260.

[0162] In one implementation, as shown in Figure 20, which is a current flow diagram based on the power supply circuit shown in Figure 19.

[0163] Between bus 210 and the second DC source 122, by controlling the conduction of the eighth switching element S8 in the power distribution circuit, the power distribution circuit can be configured to connect the fourth converter 260 to bus 210 and the second DC source 122. The DC power output from the second DC source 122 is transmitted to bus 210 after being converted by the voltage of the fourth converter 260 and the eighth switching element S8, thereby realizing the power supply of bus 210 by the second DC source 122. Alternatively, the DC power output from bus 210 can be converted by the fourth converter 260 to supply power to the second DC source 122, thereby effectively expanding the range of the supply voltage when bus 210 supplies power to the second DC source 122. Furthermore, bidirectional energy flow can be achieved between bus 210 and the second DC source 122. For example, when the second DC source 122 acts as an energy storage device, AC source 110 supplies power to the second DC source 122 through bus 210. When AC source 110 is undervoltage, the second DC source 122 discharges to bus 210 to stabilize the supply voltage at bus 210, thus achieving complementarity between power sources and enhancing the stability and reliability of the power supply system.

[0164] In one implementation, as shown in Figure 21, which is a current flow diagram based on the power supply circuit shown in Figure 19.

[0165] Between the first DC source 121 and the second DC source 122, by controlling the first switching element S1 and the fifth switching element S5 in the power distribution circuit to be turned on, the power distribution circuit can be configured to connect the fourth converter 260 to both the first DC source 121 and the second DC source 122. The DC power output from the second DC source 122 is transmitted to the first DC source 121 after passing through the voltage conversion of the fourth converter 260, the fifth switching element S5, and the first switching element S1, thereby enabling the second DC source 122 to supply power to the first DC source 121.

[0166] Thus, in the process of enabling the second DC source 122 to supply power to the first DC source 121, by controlling the conduction state of multiple switching elements in the power distribution circuit, the fourth converter 260 in the power supply circuit is reused, eliminating the need to set up an additional converter between the second DC source 122 and the first DC source 121, thereby improving the utilization rate of the converter in the power supply circuit.

[0167] As shown in Figure 22, Figure 22 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure. The power supply circuit provided in this embodiment may include at least a bus 210, a first converter 220, a power distribution circuit, a second converter 240, a third converter 250, and a fourth converter 260, and the power distribution circuit may include at least a first switching element S1, a second switching element S2, a third switching element S3, a fourth switching element S4, a fifth switching element S5, and an eighth switching element S8.

[0168] In this embodiment, the multiple switching elements in the power distribution circuit may further include a ninth switching element S9, the first end of which is connected to the first end of the fourth converter 260, and the second end of which is adapted to be connected to the terminal 130.

[0169] In one implementation, as shown in Figure 23, which is a current flow diagram based on the power supply circuit shown in Figure 22.

[0170] Between the second DC source 122 and the terminal 130, the power distribution circuit can be configured to connect the fourth converter 260 to both the second DC source 122 and the terminal 130 by controlling the ninth switching element S9 in the power distribution circuit to conduct. The DC power output from the second DC source 122 is transmitted to the terminal 130 after being converted by the voltage of the fourth converter 260 and then by the ninth switching element S, thereby enabling the second DC source 122 to supply power to the terminal 130.

[0171] As shown in Figure 24, Figure 24 is a circuit structure topology diagram of another power supply circuit provided in an embodiment of this disclosure. The power supply circuit provided in this embodiment may include at least a bus 210, a first converter 220, a power distribution circuit, a second converter 240, a third converter 250, and a fourth converter 260, and the power distribution circuit may include at least a first switching element S1, a second switching element S2, a third switching element S3, a fourth switching element S4, a fifth switching element S5, an eighth switching element S8, and a ninth switching element S9.

[0172] In this embodiment, the multiple switching elements in the power distribution circuit may further include a tenth switching element S10 and an eleventh switching element S11. The first end of the tenth switching element S10 is connected to the second end of the fourth converter 260, and the second end of the tenth switching element S10 is adapted to connect to the second DC source 122; the first end of the eleventh switching element S11 is connected to the bus 210, and the second end of the eleventh switching element S11 is connected to the second end of the fourth converter 260.

[0173] In this embodiment, by additionally setting a fourth converter 260 connected to the second DC source 122 in the power supply circuit, the first DC source 121 and the second DC source 122 can simultaneously supply power to the bus 210 / terminal 130, thereby improving the power supply power when the DC source is used to supply power to the bus 210 / terminal 130 in the power system. Furthermore, the bus 210 can simultaneously supply power to the first DC source 121 and the second DC source 122, making the power supply circuit applicable to more power supply scenarios and improving the system's flexibility.

[0174] In one implementation, as shown in Figure 25, which is a current flow diagram based on the power supply circuit shown in Figure 24.

[0175] Specifically, the power distribution circuit is configured to connect the first converter 220 to the bus 210 and the first DC source 121, and connect the fourth converter 260 to the bus 210 and the second DC source 122 when the first switching element S1, the fourth switching element S4, the eighth switching element S8 and the tenth switching element S10 are turned on.

[0176] The DC power output from the first DC source 121 is transmitted to the bus 210 after passing through the first switching element S1, the voltage conversion of the first converter 220, and the fourth switching element S4, thereby enabling the first DC source 121 to supply power to the bus 210. The DC power output from the bus 210 is then transmitted to the first DC source 121 after passing through the fourth switching element S4, the voltage conversion of the first converter 220, and the first switching element S1, thus achieving bidirectional energy transfer between the first DC source 121 and the bus 210. Similarly, the DC power output from the second DC source 122 is transmitted to the bus 210 after passing through the tenth switching element S10, the voltage conversion of the fourth converter 260, and the eighth switching element S8, thereby enabling the second DC source 122 to supply power to the bus 210. The DC power output from the bus 210 is then transmitted to the second DC source 122 after passing through the eighth switching element S8, the voltage conversion of the fourth converter 260, and the tenth switching element S10, thus achieving bidirectional energy transfer between the second DC source 122 and the bus 210.

[0177] Thus, the first DC source 121 and the second DC source 122 in the first DC source 121 can simultaneously supply power to the bus 210, increasing the power output of the first DC source 121 when supplying power to the bus 210. Furthermore, bidirectional energy transfer can be achieved between the bus 210 and the first DC source 121 and the second DC source 122, and through the voltage conversion of the converter, the range of the supply voltage when the bus 210 supplies power to the DC source can be effectively expanded, thereby improving the compatibility of the power supply circuit with electronic components.

[0178] In one implementation, as shown in Figure 26, which is another current flow diagram based on the power supply circuit shown in Figure 24.

[0179] Specifically, the power distribution circuit is configured to connect the first converter 220 to the terminal 130 and the first DC source 121, and connect the fourth converter 260 to the terminal 130 and the second DC source 122 when the first switching element S1, the second switching element S2, the ninth switching element S9 and the tenth switching element S10 are turned on.

[0180] The DC power output from the first DC source 121 is transmitted to the terminal 130 after passing through the first switching element S1, the voltage conversion of the first converter 220, and the second switching element S2, thereby enabling the first DC source 121 to supply power to the terminal 130. Similarly, the DC power output from the second DC source 122 is transmitted to the bus 210 after passing through the tenth switching element S10, the voltage conversion of the fourth converter 260, and the ninth switching element S9, thereby enabling the second DC source 122 to supply power to the terminal 130. Thus, the first DC source 121 and the second DC source 122 can simultaneously supply power to the terminal 130, improving the power output of the power system when supplying power to the terminal 130 via DC sources.

[0181] In one implementation, as shown in Figure 27, which is another current flow diagram based on the power supply circuit shown in Figure 24.

[0182] For example, when the first DC source 121 is an energy storage power source and the second DC source 122 is a photovoltaic power source, the second DC source 122 can not only supply power to the terminal 130 or the bus 210, but also supply power to the first DC source 121 when the remaining power of the first DC source 121 is lower than a preset value.

[0183] Between the first DC source 121 and the second DC source 122, by controlling the conduction of the tenth switching element S10, the first switching element S1, and the fifth switching element S5 in the power distribution circuit, the power distribution circuit can be configured to connect the fourth converter 260 to both the first DC source 121 and the second DC source 122. The DC power output from the second DC source 122 is transmitted to the first DC source 121 after passing through the tenth switching element S10, the voltage conversion of the fourth converter 260, the fifth switching element S5, and the first switching element S1, thereby enabling the second DC source 122 to supply power to the first DC source 121.

[0184] Thus, in the process of enabling the second DC source 122 to supply power to the first DC source 121, by controlling the conduction state of multiple switching elements in the power distribution circuit, the fourth converter 260 in the power supply circuit is reused. There is no need to set an additional converter between the second DC source 122 and the first DC source 121, which improves the utilization rate of the converter in the power supply circuit, reduces the number of converters set in the power supply circuit, thereby reducing the difficulty of layout and wiring in the power supply circuit design process, and thus reducing the manufacturing cost of the power supply circuit.

[0185] Furthermore, while controlling the conduction of the tenth switching element S10, the first switching element S1, and the fifth switching element S5 in the power distribution circuit, the fourth switching element S4 can also be controlled to conduct, so that the power distribution circuit can be configured to connect the first converter 220 with the first DC source 121 and the bus 210. The DC power output from the bus 210 is transmitted to the first DC source 121 after passing through the fourth switching element S4, the voltage conversion of the first converter 220, and the first switching element S1, so as to realize the power supply of the bus 210 to the first DC source 121.

[0186] Based on this, when the first DC source 121 is an energy storage power source and its power value is lower than the preset value, by setting the conduction state of multiple switching elements in the power distribution circuit, the second DC source 122 and the bus 210 can simultaneously supply power to the first DC source 121, thereby improving the charging power of the power supply circuit to the first DC source 121, realizing the complementarity between power sources, and enhancing the stability and reliability of the power supply system.

[0187] In this embodiment, by controlling the conduction mode of multiple switching elements in the power distribution circuit of the power supply circuit, the DC power output from the first DC source 121 can supply power to the bus 210 or the terminal 130 after passing through the first converter 220, and the DC power output from the second DC source 122 can supply power to the bus 210, the terminal 130 or the second DC source 122 after passing through the fourth converter 260. This improves the utilization rate of the converter in the power supply circuit and makes the power supply circuit applicable to more power supply scenarios, thereby improving the flexibility of the system.

[0188] In one implementation, as shown in Figure 28, which is another current flow diagram based on the power supply circuit shown in Figure 24.

[0189] Between AC source 110 and terminal 130, the AC power output by AC source 110 is converted into DC power by second converter 240 and transmitted to bus 210. The DC power provided by AC source 110 on bus 210 is converted into voltage by third converter 250 and transmitted to terminal 130.

[0190] Furthermore, by controlling the second switching element S2 and the third switching element S3 in the power distribution circuit to be turned on, the power distribution circuit can be configured to connect the first converter 220 with the bus 210 and the terminal 130. The DC power provided by the AC source 110 on the bus 210 is transmitted to the terminal 130 after passing through the third switching element S3, the voltage conversion of the first converter 220 and the second switching element S2 in sequence.

[0191] Furthermore, by controlling the ninth switch element S9 and the eleventh switch element S11 in the power distribution circuit to conduct, the power distribution circuit can be configured to connect the fourth converter 260 with the bus 210 and the terminal 130. The DC power supplied by the AC source 110 on the bus 210 is transmitted to the terminal 130 after passing through the eleventh switch element S11, the voltage conversion of the fourth converter 260, and the ninth switch element S9.

[0192] In this way, AC source 110 can simultaneously supply power to terminal 130 through the power supply branch where the first converter 220 is located, the power supply branch where the third converter 250 is located, and the power supply branch where the fourth converter 260 is located. This greatly increases the power supply power of the power supply circuit to terminal 130, while improving the utilization rate of the converters in the power supply circuit, reducing the number of converters set in the power supply circuit, thereby reducing the difficulty of layout and wiring in the power supply circuit design process, and thus reducing the manufacturing cost of the power supply circuit.

[0193] In this embodiment, a fourth converter 260 connected to the second DC source 122 is additionally provided in the power supply circuit. By controlling the conduction state of multiple switching elements in the power distribution circuit, the first DC source 121 and the second DC source 122 can simultaneously supply power to the bus 210 / terminal 130, thereby increasing the power supply power of the first DC source 121 when supplying power to the bus 210 / terminal 130. Furthermore, the bus 210 can simultaneously supply power to both the first DC source 121 and the second DC source 122, making the power supply circuit applicable to more power supply scenarios and improving the system's flexibility.

[0194] As shown in Figure 29, which is a circuit topology diagram of another power supply circuit provided in this embodiment, the power supply circuit provided in this embodiment includes a bus 210, a plurality of first converters 220, a plurality of power distribution circuits, and an input distribution circuit 300, wherein the plurality of first converters 220 correspond one-to-one with the plurality of power distribution circuits.

[0195] In this embodiment, each power distribution circuit is connected to a bus 210, a first converter 220 corresponding to each power distribution circuit, a first DC source 121 corresponding to each power distribution circuit, and a terminal 130 corresponding to each power distribution circuit.

[0196] Optionally, the power supply circuit may also include a second converter 240 and a plurality of third converters 250. The plurality of third converters 250 correspond one-to-one with a plurality of power distribution circuits, and the connection method of each power distribution circuit with the first converter 220, the first DC source 121, the terminal 130 and the third converter 250 corresponding to each power distribution circuit can refer to the specific connection method in the above embodiments, and will not be repeated here.

[0197] In one embodiment, as shown in FIG30, the input distribution circuit 300 includes a plurality of first input switch elements S31, each of which corresponds to a plurality of power supply distribution circuits, and each of the first input switch elements S31 corresponds to a plurality of terminals 130. The first end of each first input switch element S31 is connected to the power supply distribution circuit corresponding to each first input switch element S31, and the second end of each first input switch element S31 is adapted to connect to the terminal 130 corresponding to each first input switch element S31.

[0198] As shown in Figure 30, the input distribution circuit 300 is configured to connect the terminal 130 corresponding to the target first input switch element to the power supply distribution circuit 230 corresponding to the target first input switch element when the target first input switch element is turned on.

[0199] Optionally, each power distribution circuit 230 can be configured to connect the first converter corresponding to each power distribution circuit 230 with the first DC source corresponding to each power distribution circuit 230 and the input distribution circuit 300, so that the bus and multiple first DC sources can simultaneously output DC power to the input distribution circuit 300 to power the terminal 130.

[0200] Alternatively, each power distribution circuit 230 can be configured to connect the first converter corresponding to each power distribution circuit 230 to the bus and the input distribution circuit 300, so that the bus can simultaneously output DC power to the input distribution circuit 300 through the two power supply branches of the first converter and the third converter corresponding to each power distribution circuit 230 to supply power to the terminal 130.

[0201] In one implementation, by controlling the first input switch element S31 corresponding to each terminal 130 to be turned on, the input distribution circuit 300 receiving DC power is configured to supply power to multiple terminals 130 simultaneously, and the input distribution circuit 300 supplies the same power to different terminals 130.

[0202] In one embodiment, as shown in FIG31, the input distribution circuit 300 further includes a plurality of second input switching elements S32, and a second input switching element S32 is connected between the first ends of any two first input switching elements S31; the input distribution circuit 300 is configured to connect a target terminal to at least one power distribution circuit 230, wherein the target terminal is any one of the plurality of terminals 130.

[0203] In one implementation, by controlling the partial conduction of a plurality of first input switching elements S31 and a plurality of second input switching elements S32, the power supply power of the plurality of terminals 130 when the AC source and the plurality of first DC sources supply power to the plurality of terminals 130 is at least partially different.

[0204] For example, as shown in FIG32, FIG32 is a current flow diagram according to the input distribution circuit 300 shown in FIG31. In this embodiment, the plurality of first input switching elements in the input distribution circuit 300 include S311, S312 and S313, the plurality of second input switching elements in the input distribution circuit 300 include S321, S322 and S323, and the plurality of terminals include T1, T2 and T3.

[0205] The first end of S311 is connected to the first ends of S321 and S323, and the second end of S311 is connected to T1; the first end of S312 is connected to the second end of S321 and the first end of S322, and the second end of S312 is connected to T2; the first end of S313 is connected to the second end of S322 and the second end of S323, and the second end of S313 is connected to T3.

[0206] By controlling the conduction of S311, S312, and S322 in the input distribution circuit 300, one-third of the DC power received by the input distribution circuit 300 is output to T1 through S311, one-third of the DC power received by the input distribution circuit 300 is output to T2 through S312, and one-third of the DC power received by the input distribution circuit 300 is output to T2 through S322 and S312. At this time, when the input distribution circuit 300 supplies power to the three terminals, the power supply of T1: the power supply of T2: the power supply of T3 = 1:2:0.

[0207] Thus, by controlling the conduction states of multiple first input switching elements and multiple second input switching elements in the input distribution circuit 300, the input distribution circuit 300 is configured to distribute the power supply to multiple terminals when AC sources and multiple first DC sources supply power. Furthermore, the use of the input distribution circuit 300 effectively expands the power supply range for different terminals while reducing the amount of copper busbars and cables used in the power supply circuit, thereby lowering the deployment cost of the power supply circuit.

[0208] In one embodiment, the power supply circuit may further include multiple output distribution circuits 400, each of which corresponds to a multiple terminal 130.

[0209] In one embodiment, as shown in FIG33, each output distribution circuit 400 includes a plurality of first output switching elements S41, each terminal includes a plurality of power supply ports 131, the plurality of output distribution circuits 400 correspond one-to-one with the plurality of first input switching elements S31, and the plurality of first output switching elements S41 correspond one-to-one with the plurality of power supply ports 131.

[0210] The first end of each first output switch element S41 is connected to the second end of the first input switch element S31 corresponding to the output distribution circuit 400, and the second end of each first output switch element S41 is adapted to be connected to the power supply port 131 corresponding to each first output switch element S41.

[0211] In one embodiment, the output distribution circuit 400 is configured to connect the power supply port 131 corresponding to the target first output switch element to the first input switch element S31 corresponding to the target first output switch element when the target first output switch element is turned on.

[0212] In one embodiment, the output distribution circuit 400 further includes a plurality of second output switching elements S42, with a second output switching element S42 connected between the first terminals of any two first output switching elements S41. The output distribution circuit 400 is configured to connect a target power supply port in the output distribution circuit 400 to at least one power supply distribution circuit, wherein the target power supply port is any one of the plurality of power supply ports 131 corresponding to each output distribution circuit 400. The circuit structure and current flow of the output distribution circuit 400 can be referred to the input distribution circuits in Figures 30 to 32 above, and will not be repeated here.

[0213] As shown in Figure 29, by controlling the conduction states of multiple first output switches and multiple second output switches in the output distribution circuit 400 corresponding to each terminal 130, the output distribution circuit 400 can be configured to distribute the power supply from different power supply ports at each terminal 130 when the AC source 110 and multiple first DC sources 121 supply power to multiple terminals 130. Furthermore, the use of the output distribution circuit 400 effectively expands the power range of different power supply ports while further reducing the amount of copper busbars and cables used in the power supply circuit, thereby further reducing the deployment cost of the power supply circuit.

[0214] In this embodiment, by setting an input distribution circuit 300 in the power supply circuit, the input distribution circuit 300 can flexibly allocate the number of power supply branches connected to the terminal 130. This allows the input distribution circuit 300 to be configured to flexibly allocate the power supply to the multiple terminals 130 when the AC source 110 and the multiple first DC sources 121 supply power, thereby adjusting the power supply at different terminals 130. Furthermore, by setting an output distribution circuit 400 in the power supply circuit, the output distribution circuit 400 can flexibly allocate the number of power supply branches connected to each power supply port in each terminal 130. This allows the output distribution circuit 400 to be configured to flexibly allocate the power supply to different power supply ports under the terminal 130, flexibly matching the usage needs of different users and improving the user experience. Simultaneously, the use of the input distribution circuit 300 and the output distribution circuit 400 effectively expands the power supply range of different terminals 130 while reducing the amount of copper busbars and cables used in the power supply circuit, thereby reducing the deployment cost of the power supply circuit.

[0215] As shown in Figure 34, which is a circuit topology diagram of another power supply circuit provided in this embodiment, the power supply circuit provided in this embodiment includes multiple buses 210, multiple first converters 220, multiple power distribution circuits 230, bus connection circuits 500, and switching circuits 600. The multiple buses 210 correspond one-to-one with the multiple first converters 220, and the multiple buses 210 correspond one-to-one with the multiple power distribution circuits 230.

[0216] In this embodiment, each bus 210 is also connected to an AC source 110 corresponding to each bus 210, and each power distribution circuit 230 is connected to the bus 210, the first converter 220, the first DC source 121, and the terminal 130 corresponding to each power distribution circuit 230. The bus connection circuit 500 is adapted to connect multiple AC sources 110 and multiple buses 210.

[0217] In one embodiment, the bus connection circuit 500 includes a plurality of first bus switching elements S51, each corresponding to a plurality of buses 210. A first terminal of each first bus switching element S51 is connected to an AC source 110 corresponding to that first bus switching element S51, and a second terminal of each first bus switching element S51 is connected to the bus 210 corresponding to that first bus switching element S51. The bus connection circuit 500 is configured to connect the AC source 110 corresponding to the target first bus switching element to the bus 210 corresponding to the target first bus switching element when the target first bus switching element is turned on.

[0218] In one embodiment, the bus connection circuit 500 further includes a plurality of second bus switching elements S52, with a second bus switching element S52 connected between the second ends of any two first bus switching elements S51. The bus connection circuit 500 is configured to connect a target AC source to at least one bus 210, wherein the target AC source is any one of the plurality of AC sources 110.

[0219] Optionally, the switching circuit 600 connects multiple power distribution circuits 230 and multiple terminals 130, and the switching circuit 600 is adapted to connect multiple power distribution circuits 230 and multiple terminals 130.

[0220] In one embodiment, as shown in FIG35, the switching circuit 600 includes a plurality of third input switching elements S61 and a plurality of fourth input switching elements S62. The plurality of third input switching elements S61 correspond one-to-one with a plurality of power distribution circuits 230. The first end of each third input switching element S61 is connected to the power distribution circuit 230 corresponding to each third input switching element S61, and the second end of each third input switching element S61 is adapted to be connected to the terminal 130 corresponding to each third input switching element S61. A fourth input switching element S62 is connected between the first ends of any two third input switching elements S61. The circuit structure of the switching circuit 600 can refer to the specific structure of the input distribution circuit or output distribution circuit described in the above embodiments, and will not be repeated here.

[0221] The switching circuit 600 is configured to connect a target terminal to at least one power distribution circuit 230, the target terminal being any one of a plurality of terminals 130. In one embodiment, the switching circuit 600 is configured to distribute the power supply when a plurality of AC sources 110 and a plurality of first DC sources 121 supply power to a plurality of terminals 130.

[0222] Optionally, with the number of AC sources 110 and the first DC source 121 in the power supply circuit remaining unchanged, and the power supply provided to the multiple terminals 130 remaining unchanged, setting multiple buses 210 in the power supply circuit can reduce the current flowing through each bus 210 during operation, thereby greatly reducing energy loss due to heat loss during power supply. Furthermore, since the current flowing through the bus 210 is reduced, the cross-sectional area of ​​the copper busbars in the bus 210 can be reduced while ensuring the safe use of the bus 210, thereby reducing the amount of copper busbars and cables used in the power supply circuit, and thus reducing the layout cost of the power supply circuit.

[0223] In this embodiment, by controlling the conduction state of multiple switching elements in the power distribution circuit 230, the number of buses 210 connected to the power supply circuit can be adjusted while keeping the number of AC sources 110 and the first DC source 121 constant. This allows the bus 210 and its connected electronic components to be disconnected from the power supply circuit when a short circuit occurs in any bus 210, causing the bus 210 to require maintenance. This ensures that the power system can maintain a safe operating state and improves the operational stability of the power system in which the power supply circuit is located.

[0224] As shown in Figure 36, Figure 36 is a structural block diagram of a power system 100 provided in an embodiment of this disclosure. The power system 100 provided in this embodiment includes at least an AC source 110, a first DC source 121, and a power supply circuit 200 as described in any of the above embodiments.

[0225] In this embodiment, the power supply circuit 200 connects the AC source 110, the first DC source 121 and the terminal 130. The power supply circuit 200 is configured to enable conduction between any two of the AC source 110, the first DC source 121 and the terminal 130 in the power system 100, so as to realize bidirectional energy flow between any two of the AC source 110, the first DC source 121 and the terminal 130.

[0226] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0227] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A power supply circuit (200), characterized in that, The power supply circuit (200) includes: Busbar (210), said busbar (210) is adapted to connect to an AC source (110); The first converter (220), and A power distribution circuit (230) is adapted to connect the bus (210), the first converter (220), the first DC source (121), and the terminal (130).

2. The power supply circuit (200) according to claim 1, characterized in that, The power distribution circuit (230) is configured to connect the first converter (220) to any two of the bus (210), the first DC source (121), and the terminal (130).

3. The power supply circuit (200) according to claim 1 or 2, characterized in that, The power distribution circuit (230) includes a plurality of switching elements, and the bus (210), the first DC source (121) and the terminal (130) are adapted to connect at least one of the plurality of switching elements; The power distribution circuit (230) is configured to, when at least one of the plurality of switching elements is turned on, connect the first converter (220) to the bus (210) and the terminal (130); or connect the first converter (220) to the first DC source (121) and the terminal (130); or connect the bus (210) and the first DC source (121); or connect the first converter (220) to the bus (210) and the first DC source (121).

4. The power supply circuit (200) according to any one of claims 1 to 3, characterized in that, The power distribution circuit (230) includes: A first switching element (S1) has a first end connected to the second end of the first converter (220), and the second end of the first switching element (S1) is adapted to be connected to the first DC source (121). A second switching element (S2), the first end of which is connected to the first end of the first converter (220), and the second end of which is adapted to be connected to the terminal (130); and The third switching element (S3) has its first end connected to the bus (210) and its second end connected to the second end of the first converter (220).

5. The power supply circuit (200) according to claim 4, characterized in that, The power distribution circuit (230) is configured to connect the first converter (220) to the bus (210) and the terminal (130) when the second switching element (S2) and the third switching element (S3) are turned on; or, When the first switching element (S1) and the second switching element (S2) are turned on, the first converter (220) is connected to the first DC source (121) and the terminal (130).

6. The power supply circuit (200) according to any one of claims 1 to 5, characterized in that, The power supply circuit (200) also includes a second converter (240); The first end of the second converter (240) is adapted to be connected to the AC source (110), and the second end of the second converter (240) is connected to the bus (210).

7. The power supply circuit (200) according to any one of claims 4 to 6, characterized in that, The power distribution circuit (230) is configured to connect the bus (210) to the first DC source (121) when the first switching element (S1) and the third switching element (S3) are turned on.

8. The power supply circuit (200) according to any one of claims 4 to 7, characterized in that, The power distribution circuit (230) also includes a fourth switching element (S4); The first end of the fourth switching element (S4) is connected to the bus (210), and the second end of the fourth switching element (S4) is connected to the first end of the first converter (220).

9. The power supply circuit (200) according to claim 8, characterized in that, The power distribution circuit (230) is configured to connect the first converter (220) to the bus (210) and the first DC source (121) when the first switching element (S1) and the fourth switching element (S4) are turned on.

10. The power supply circuit (200) according to any one of claims 1 to 8, characterized in that, The power supply circuit (200) also includes a third converter (250); The first end of the third converter (250) is connected to the bus (210), and the second end of the third converter (250) is adapted to be connected to the terminal (130).

11. The power supply circuit (200) according to any one of claims 8 to 10, characterized in that, The power distribution circuit (230) also includes a fifth switching element (S5); The first end of the fifth switching element (S5) is connected to the second end of the first converter (220), and the second end of the fifth switching element (S5) is adapted to be connected to the second DC source (122).

12. The power supply circuit (200) according to claim 11, characterized in that, The power distribution circuit (230) is configured to connect the first converter (220) to the second DC source (122) and the terminal (130) when the second switching element (S2) and the fifth switching element (S5) are turned on; or, When the fourth switching element (S4) and the fifth switching element (S5) are turned on, the first converter (220) is connected to the bus (210) and the second DC source (122); or, When the third switching element (S3) and the fifth switching element (S5) are turned on, the bus (210) is connected to the second DC source (122).

13. The power supply circuit (200) according to any one of claims 8 to 11, characterized in that, The power distribution circuit (230) also includes a sixth switching element (S6) and a seventh switching element (S7); The first end of the sixth switching element (S6) is connected to the second end of the second switching element (S2), and the second end of the sixth switching element (S6) is adapted to be connected to the terminal (130); The first end of the seventh switching element (S7) is adapted to be connected to the second DC source (122), and the second end of the seventh switching element (S7) is connected to the first end of the sixth switching element (S6).

14. The power supply circuit (200) according to claim 13, characterized in that, The power distribution circuit (230) is configured to connect the first converter (220) to the first DC source (121) and the second DC source (122) when the first switching element (S1), the second switching element (S2), and the seventh switching element (S7) are turned on; or, When the fifth switching element (S5), the fourth switching element (S4), and the seventh switching element (S7) are turned on, the bus (210) and the second DC source (122) are turned on through the first converter (220), and the bus (210) and the second DC source (122) are turned on through the third converter (250).

15. The power supply circuit (200) according to any one of claims 11 to 14, characterized in that, The power supply circuit (200) also includes a fourth converter (260); The first end of the fourth converter (260) is connected to the second end of the fifth switching element (S5), and the second end of the fourth converter (260) is adapted to be connected to the second DC source (122).

16. The power supply circuit (200) according to claim 15, characterized in that, The power distribution circuit (230) also includes an eighth switching element (S8); The first end of the eighth switching element (S8) is connected to the bus (210), and the second end of the eighth switching element (S8) is connected to the first end of the fourth converter (260).

17. The power supply circuit (200) according to claim 16, characterized in that, The power distribution circuit (230) is configured to connect the fourth converter (260) to the bus (210) and the second DC source (122) when the eighth switching element (S8) is turned on; or, When the first switching element (S1) and the fifth switching element (S5) are turned on, the fourth converter (260) is connected to the first DC source (121) and the second DC source (122).

18. The power supply circuit (200) according to any one of claims 15 to 17, characterized in that, The power distribution circuit (230) also includes a ninth switching element (S9); The first end of the ninth switching element (S9) is connected to the first end of the fourth converter (260), and the second end of the ninth switching element (S9) is adapted to be connected to the terminal (130).

19. The power supply circuit (200) according to claim 18, characterized in that, The power distribution circuit (230) is configured to connect the fourth converter (260) to the second DC source (122) and the terminal (130) when the ninth switching element (S9) is turned on.

20. The power supply circuit (200) according to any one of claims 15 to 19, characterized in that, The power distribution circuit (230) also includes a tenth switching element (S10) and an eleventh switching element (S11); The first end of the tenth switching element (S10) is connected to the second end of the fourth converter (260), and the second end of the tenth switching element (S10) is adapted to be connected to the second DC source (122); The first end of the eleventh switching element (S11) is connected to the bus (210), and the second end of the eleventh switching element (S11) is connected to the second end of the fourth converter (260).

21. The power supply circuit (200) according to claim 20, characterized in that, The power distribution circuit (230) is configured to connect the second DC source (122) to the bus (210) when the tenth switching element (S10) and the eleventh switching element (S11) are turned on; or, When the eighth switching element (S8) and the tenth switching element (S10) are turned on, the fourth converter (260) is connected to the bus (210) and the second DC source (122); or, When the ninth switching element (S9) and the eleventh switching element (S11) are turned on, the fourth converter (260) is connected to the bus (210) and the terminal (130).

22. The power supply circuit (200) according to any one of claims 1 to 21, characterized in that, The power supply circuit (200) includes a plurality of first converters (220), a plurality of power distribution circuits (230), and an input distribution circuit (300), wherein the plurality of first converters (220) and the plurality of power distribution circuits (230) correspond one-to-one; Each of the power distribution circuits (230) is adapted to connect the bus (210), the first converter (220) corresponding to each power distribution circuit (230), the first DC source (121) corresponding to each power distribution circuit (230), and the terminal (130) corresponding to each power distribution circuit (230); The input distribution circuit (300) includes a plurality of first input switch elements (S31), each of which corresponds to a plurality of power supply distribution circuits (230) and a plurality of terminals (130). The first end of each first input switch element (S31) is connected to the power supply distribution circuit (230) corresponding to each first input switch element (S31), and the second end of each first input switch element (S31) is adapted to be connected to the terminal (130) corresponding to each first input switch element (S31).

23. The power supply circuit (200) according to claim 22, characterized in that, The input distribution circuit (300) is configured to connect the terminal (130) corresponding to the target first input switch element to the power supply distribution circuit (230) corresponding to the target first input switch element when the target first input switch element is turned on.

24. The power supply circuit (200) according to claim 22 or 23, characterized in that, The input distribution circuit (300) also includes a plurality of second input switching elements (S32); A second input switch element (S32) is connected between the first terminals of any two first input switch elements (S31); The input distribution circuit (300) is configured to connect a target terminal to at least one of the power distribution circuits (230), the target terminal being any one of the plurality of terminals (130).

25. The power supply circuit (200) according to any one of claims 22 to 24, characterized in that, The power supply circuit (200) further includes a plurality of output distribution circuits (400), each of which corresponds to one of the plurality of first input switch elements (S31) and each of which corresponds to one of the plurality of terminals (130). Each of the output distribution circuits (400) includes a plurality of first output switching elements (S41), and each of the terminals (130) includes a plurality of power supply ports (131), wherein the plurality of first output switching elements (S41) corresponds one-to-one with the plurality of power supply ports (131); The first end of each of the first output switching elements (S41) is connected to the second end of the first input switching element (S31) corresponding to the output distribution circuit (400), and the second end of each of the first output switching elements (S41) is adapted to be connected to the power supply port (131) corresponding to each of the first output switching elements (S41).

26. The power supply circuit (200) according to claim 25, characterized in that, The output distribution circuit (400) is configured to connect the power supply port (131) corresponding to the target first output switch element to the first input switch element (S31) corresponding to the target first output switch element when the target first output switch element is turned on.

27. The power supply circuit (200) according to claim 25 or 26, characterized in that, The output distribution circuit (400) also includes a plurality of second output switching elements (S42); A second output switching element (S42) is connected between the first terminals of any two first output switching elements (S41); The output distribution circuit (400) is configured to connect the target power supply port corresponding to the output distribution circuit (400) to at least one of the power supply distribution circuits (230), wherein the target power supply port is any one of the plurality of power supply ports (131) corresponding to each output distribution circuit (400).

28. The power supply circuit (200) according to any one of claims 1 to 27, characterized in that, The power supply circuit (200) includes a plurality of buses (210), a plurality of first converters (220), a plurality of power distribution circuits (230), and a bus connection circuit (500). The plurality of buses (210) correspond one-to-one with the plurality of first converters (220), and the plurality of buses (210) correspond one-to-one with the plurality of power distribution circuits (230). Each of the busbars (210) is also adapted to connect to an AC source (110) corresponding to each of the busbars (210); Each of the power distribution circuits (230) is adapted to connect to the bus (210), the first converter (220), the first DC source (121), and the terminal (130) corresponding to each power distribution circuit (230); The bus connection circuit (500) is adapted to connect a plurality of the AC sources (110) and a plurality of the buses (210); The bus connection circuit (500) includes a plurality of first bus switch elements (S51), and the plurality of first bus switch elements (S51) correspond one-to-one with the plurality of buses (210); The first end of each first bus switch element (S51) is adapted to be connected to the AC source (110) corresponding to each first bus switch element (S51), and the second end of each first bus switch element (S51) is connected to the bus (210) corresponding to each first bus switch element (S51).

29. The power supply circuit (200) according to claim 28, characterized in that, The bus connection circuit (500) is configured to connect the AC source (110) corresponding to the target first bus switch element to the bus (210) corresponding to the target first bus switch element when the target first bus switch element is turned on.

30. The power supply circuit (200) according to claim 29, characterized in that, The bus connection circuit (500) further includes a plurality of second bus switching elements (S52), wherein a second bus switching element (S52) is connected between the second ends of any two first bus switching elements (S51); The bus connection circuit (500) is configured to connect a target AC source (110) to at least one of the buses (210), the target AC source being any one of the plurality of AC sources (110).

31. The power supply circuit (200) according to any one of claims 28 to 30, characterized in that, The power supply circuit (200) further includes a switching circuit (600) adapted to connect a plurality of the power distribution circuits (230) and a plurality of the terminals (130); The switching circuit (600) includes a plurality of third input switching elements (S61) and a plurality of fourth input switching elements (S62), wherein the plurality of third input switching elements (S61) correspond one-to-one with the plurality of power distribution circuits (230); The first end of each of the third input switch elements (S61) is connected to the power distribution circuit (230) corresponding to each of the third input switch elements (S61), the second end of each of the third input switch elements (S61) is adapted to be connected to the terminal (130) corresponding to each of the third input switch elements (S61), and a fourth input switch element (S62) is connected between the first ends of any two of the third input switch elements (S61). The switching circuit (600) is configured to connect a target terminal to at least one of the power distribution circuits (230), the target terminal being any one of the plurality of terminals (130).

32. The power supply circuit (200) according to any one of claims 1 to 31, characterized in that, AC source (110) includes one or more of an AC power grid and an AC generator; When the AC source (110) is connected to the bus (210), the AC source (110) is used to provide AC power to the bus (210).

33. The power supply circuit (200) according to any one of claims 1 to 31, characterized in that, The first DC source (121) includes one or more of a photovoltaic power source, an energy storage power source, and a DC generator; When the first DC source (121) is connected to the first target element, the first DC source (121) is used to provide DC power to the first target element, the first target element including at least one of the bus (210), the terminal (130) and the second DC source (122).

34. The power supply circuit (200) according to any one of claims 1 to 31, characterized in that, The first converter (220) is a DC-DC converter; When the first converter (220) is connected to the second target element, the first converter (220) is used to boost or buck the DC power from the second target element, which is any one of the bus (210), the first DC source (121), and the second DC source (122).

35. The power supply circuit (200) according to any one of claims 6 to 31, characterized in that, The second converter (240) is an AC-DC converter; When the second converter (240) is connected to the AC source (110) and the bus (210), the second converter (240) is used to convert the AC power from the AC source (110) into DC power and provide the converted DC power to the bus (210).

36. The power supply circuit (200) according to any one of claims 10 to 31, characterized in that, The third converter (250) is a DC-DC converter; When the third converter (250) is connected to the third target element, the third converter (250) is used to boost or buck the DC power from the third target element, which is either the bus (210) or the second DC source (122).

37. The power supply circuit (200) according to any one of claims 11 to 31, characterized in that, The second DC source (122) includes one or more of a photovoltaic power source, an energy storage power source, and a DC generator; When the second DC source (122) is connected to the fourth target element, the second DC source (122) is used to provide DC power to the fourth target element, the fourth target element including at least one of the bus (210), the terminal (130) and the first DC source (121).

38. The power supply circuit (200) according to any one of claims 15 to 31, characterized in that, The fourth converter (260) is a DC-DC converter; When the fourth converter (260) is connected to the fifth target element, the fourth converter (260) is used to boost or buck the DC power from the fifth target element, which is any one of the bus (210), the first DC source (121), and the second DC source (122).

39. A power system (100), characterized in that, It includes an AC source (110), a first DC source (121), and a power supply circuit (200) as claimed in any one of claims 1 to 31, the power supply circuit (200) being connected to the AC source (110) and the first DC source (121), and the power supply circuit (200) being adapted to connect to a terminal (130).

Images