Power supply circuit

Abstract

The utility model discloses a power supply circuit which is used for an energy storage power supply, the power supply circuit comprises a switch circuit, and a control module, an input end and a load end which are connected to the switch circuit, and the input end comprises a single-phase input end, a split-phase input end and a direct current input end. The control module is used for controlling the switching circuit to be switched among a first mode, a second mode and a third mode, and when the switching circuit is in the first mode, the single-phase input end and the load end are connected; when the switching circuit is in the second mode, the split-phase input end and the load end are connected; when the switching circuit is in the third mode, the DC input end and the load end are connected. According to the power supply circuit provided by the invention, the switching circuit is controlled by the control module to perform mode switching, so that the energy storage power supply can be connected with the corresponding external power supply through the single-phase input end, the split-phase input end or the direct-current input end according to use requirements in different modes; one energy storage power supply can meet various different types of power utilization requirements of the energy storage power supply at the same time, and the use experience of a user is improved.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage power supply, and more specifically, to a power supply circuit. Background Art

[0002] When energy storage power supplies are used outdoors, they usually require an external DC or AC power supply. Different areas outdoors may provide different power supplies such as single-phase mains power, split-phase mains power or DC power for use with energy storage power supplies. However, in related technologies, one energy storage power supply generally only supports one external power supply. Therefore, when users use energy storage power supplies outdoors, they need to find a corresponding external power supply, or bring multiple energy storage devices outdoors to meet different usage scenarios, which is inconvenient to use. Utility Model Content

[0003] An embodiment of the present application provides a power supply circuit.

[0004] The power supply circuit of the embodiment of the present application is used for an energy storage power supply. The power supply circuit includes a switching circuit and a control module, an input end and a load end connected to the switching circuit. The input end includes a single-phase input end, a split-phase input end and a DC input end. The control module is used to control the switching circuit to switch between a first mode, a second mode and a third mode. When the switching circuit is in the first mode, the single-phase input end is connected to the load end; when the switching circuit is in the second mode, the split-phase input end is connected to the load end; when the switching circuit is in the third mode, the DC input end is connected to the load end.

[0005] The power supply circuit proposed in the present application controls the switch circuit to switch modes through a control module, so that the energy storage power supply can be connected to the corresponding external power supply through the single-phase input terminal, the split-phase input terminal or the DC input terminal according to the usage requirements in different modes, so that one energy storage power supply can simultaneously solve the power requirements of various types of energy storage power supplies, thereby improving the user experience.

[0006] In some embodiments, the switch circuit includes a first switch, the first switch connects the single-phase input terminal and the load terminal, and when the switch circuit is in the first mode, the control module controls the first switch to close.

[0007] In this way, the control module can control the switch circuit to switch to the first mode through the first switch.

[0008] In some embodiments, the switching circuit includes a second switch, wherein the second switch connects the split-phase input terminal and the load terminal, and when the switching circuit is in the second mode, the control module controls the second switch to close.

[0009] In this way, the control module can control the switch circuit to switch to the second mode through the second switch.

[0010] In some embodiments, the load end includes a DC load end and an AC load end, and the DC load end and the AC load end are respectively connected to the input end.

[0011] In this way, the load end can be connected to more forms and types of loads.

[0012] In some embodiments, the control module may also be used to control the AC load terminal to switch between a single-phase load mode and a split-phase load mode.

[0013] In this way, the control module can control the AC load end so that the AC load end can be connected to both a single-phase load and a split-phase load.

[0014] In some embodiments, the switching circuit includes a third switch and a fourth switch, wherein the third switch and the fourth switch connect the input end and the AC load end, and when the AC load end is in a single-phase load mode, the third switch or the fourth switch is closed; when the AC load end is in a split-phase load mode, the third switch and the fourth switch are closed.

[0015] In this way, the control module can control the AC load end to switch between the single-phase load mode and the split-phase load mode through the third switch and the fourth switch.

[0016] In some embodiments, the switching circuit also includes a battery. When the switching circuit is in the first mode, the second mode, or the third mode, the input end is used to charge the battery. The control module can also control the switching circuit to switch to a fourth mode. When the switching circuit is in the fourth mode, the battery supplies power to the load end.

[0017] In this way, when all input terminals cannot be connected to external power, the battery can temporarily power the load terminal.

[0018] In some embodiments, the control module is used to control the switch circuit to switch to the first mode when the single-phase input terminal is electrically connected to the single-phase AC power and the split-phase input terminal and the DC input terminal are disconnected from the outside.

[0019] In this way, when only the single-phase input terminal is electrically connected to the single-phase mains, the control module can switch the switch circuit to the first mode.

[0020] In some embodiments, the control module is used to control the switch circuit to switch to the second mode when the split-phase input terminal is electrically connected to the split-phase AC power and the single-phase input terminal and the DC input terminal are disconnected from the outside.

[0021] In this way, when only the split-phase input terminal is electrically connected to the single-phase mains, the control module can switch the switch circuit to the second mode.

[0022] In some embodiments, the control module is used to control the switch circuit to switch to the third mode when the DC input terminal is electrically connected to a DC power supply and the single-phase input terminal and the split-phase input terminal are disconnected from the outside.

[0023] In this way, when only the DC input terminal is electrically connected to the DC power supply, the control module can switch the switch circuit to the third mode.

[0024] In some embodiments, the control module is used to control the switching circuit to switch to the second mode when the single-phase input terminal is electrically connected to the single-phase AC power, the split-phase input terminal is electrically connected to the split-phase AC power, and the DC input terminal is disconnected from the outside.

[0025] In this way, when the single-phase input terminal is electrically connected to the single-phase mains and the split-phase input terminal is electrically connected to the split-phase mains at the same time, the control module can switch the switch circuit to the second mode to ensure fast charging of the battery.

[0026] In some embodiments, the control module is used to control the switching circuit to switch to the second mode and the third mode when the single-phase input terminal is electrically connected to the single-phase AC power, the split-phase input terminal is electrically connected to the split-phase AC power, and the DC input terminal is electrically connected to the DC power supply.

[0027] In this way, when the single-phase input terminal is electrically connected to the single-phase AC power, the split-phase input terminal is electrically connected to the split-phase AC power, and the DC input terminal is electrically connected to the DC power supply, the control module can switch the switching circuit to the second mode and the third mode to work simultaneously to reduce the use of AC power and reduce electricity bills.

[0028] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 is a circuit diagram of a power supply circuit according to an embodiment of the present application;

[0031] Figure 2 Schematic diagram of a power supply circuit according to an embodiment of the present application.

[0032] Description of main component symbols: power supply circuit 100, control module 10, input terminal 20, single-phase input terminal 21, first phase line 211, first ground line 212, split-phase input terminal 22, second phase line 221, second ground line 222, third phase line 223, DC input terminal 23, power line 231, signal line 232, load terminal 30, DC load terminal 31, AC load terminal 32, fourth phase line 321, third ground line 322, fifth phase line 323, rectifier inverter module 40, first bidirectional ACDC module 41, second bidirectional ACDC module 42, first DCDC module 43, second DCDC module 44, first switch 50, second switch 60, third switch 70, fourth switch 80, battery 90. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. In the description of the present invention, it is necessary to understand that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] The disclosure herein provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described herein. Of course, they are merely examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art may appreciate the application of other processes and / or the use of other materials.

[0037] When energy storage power supplies are used outdoors, they usually require an external DC or AC power supply. Different areas outdoors may provide different power supplies such as single-phase mains power, split-phase mains power or DC power for use with energy storage power supplies. However, in related technologies, one energy storage power supply generally only supports one external power supply. Therefore, when users use energy storage power supplies outdoors, they need to find a corresponding external power supply, or bring multiple energy storage devices outdoors to meet different usage scenarios, which is inconvenient to use.

[0038] See also Figure 1 The power supply circuit 100 of the embodiment of the present application is used for energy storage power supply. The power supply circuit 100 includes a switching circuit and a control module 10 connected to the switching circuit, an input terminal 20 and a load terminal 30. The input terminal 20 includes a single-phase input terminal 21, a split-phase input terminal 22 and a DC input terminal 23. The control module 10 is used to control the switching circuit to switch between a first mode, a second mode and a third mode. When the switching circuit is in the first mode, the single-phase input terminal 21 is connected to the load terminal 30; when the switching circuit is in the second mode, the split-phase input terminal 22 is connected to the load terminal 30; when the switching circuit is in the third mode, the DC input terminal 23 is connected to the load terminal 30.

[0039] The power supply circuit 100 proposed in the present application controls the switch circuit to switch modes through the control module 10, so that the energy storage power supply can be connected to the corresponding external power supply through the single-phase input terminal 21, the split-phase input terminal 22 or the DC input terminal 23 according to the usage requirements in different modes, so that one energy storage power supply can simultaneously solve the power requirements of various types of energy storage power supplies, thereby improving the user experience.

[0040] Specifically, the input terminal 20 refers to a port for connecting an external power source, wherein the single-phase input terminal 21 is used to connect single-phase alternating current, the split-phase input terminal 22 is used to connect split-phase alternating current, and the DC input terminal 23 is used to connect direct current.

[0041] The load terminal 30 refers to a port for connecting an external load, and the external load includes various electrical appliances used outdoors.

[0042] The switch circuit further includes a rectifier and inverter module 40 , which includes a first bidirectional ACDC module 41 , a second bidirectional ACDC module 42 , a first DCDC module 43 and a second DCDC module 44 .

[0043] The bidirectional ACDC module is a power supply device whose working principle is based on the combination of a full-bridge rectifier circuit and a half-bridge inverter circuit. When the device is in the rectifier mode, the power switch device is controlled to be on and off according to a certain timing to convert the input AC power into DC output; and when the device is in the inverter mode, the power switch device is controlled to be on and off to convert DC power into AC output. By controlling the on and off timing of the power switch device, the amplitude, phase and frequency of the output voltage can be adjusted and controlled.

[0044] The bidirectional ACDC module has the function of charging and discharging at the same time. For example, during the charging process, the module converts AC power into DC power to charge the battery; during the discharging process, the module converts the battery's DC power into AC power to power the load. This device is particularly suitable for various battery application scenarios and can ensure the safety and stability of the battery during the charging and discharging process.

[0045] DCDC module, also known as DC-DC power module, is an electronic component that converts DC voltage into another DC voltage. DCDC module can achieve different forms of voltage conversion such as step-up, step-down, reverse, isolation, etc. In many applications, it is used as a power supply for electronic devices.

[0046] See also Figure 2 In some embodiments, the switch circuit includes a first switch 50, the first switch 50 connects the single-phase input terminal 21 and the load terminal 30, and when the switch circuit is in the first mode, the control module 10 controls the first switch 50 to be closed.

[0047] In this way, the control module can control the switch circuit to switch to the first mode through the first switch 50 .

[0048] Specifically, the single-phase input terminal 21 includes a first phase line 211 and a first ground line 212 , and the first switch 50 includes two linked switches, which are respectively used to connect the first phase line 211 and the load terminal 30 and the first ground line 212 and the load terminal 30 .

[0049] In some embodiments, the switch circuit includes a second switch 60 , which connects the split-phase input terminal 22 and the load terminal 30 . When the switch circuit is in the second mode, the control module 10 controls the second switch 60 to be closed.

[0050] In this way, the control module can control the switch circuit to switch to the second mode through the second switch 60 .

[0051] Specifically, the split-phase input terminal 22 includes a second phase line 221, a second ground line 222 and a third phase line 223, and the second switch 60 includes three linked switches, which are respectively used to connect the second phase line 221 and the load terminal 30, the second ground line 222 and the load terminal 30, and the third phase line 223 and the load terminal 30.

[0052] See also Figure 1 In some embodiments, the load terminal 30 includes a DC load terminal 31 and an AC load terminal 32 , and the DC load terminal 31 and the AC load terminal 32 are respectively connected to the input terminal 20 .

[0053] In this way, the load end 30 can be connected to loads of more forms and types.

[0054] Specifically, the DC load terminal 31 is used to connect a DC load, and the AC load terminal 32 is used to connect an AC load.

[0055] In some embodiments, the control module 10 may also be used to control the AC load terminal 32 to switch between a single-phase load mode and a split-phase load mode.

[0056] In this way, the control module 10 can control the AC load terminal 32 so that the AC load terminal 32 can be connected to both a single-phase load and a split-phase load.

[0057] Specifically, the AC load terminal 32 can be connected to either a single-phase load or a split-phase load.

[0058] See also Figure 2In some embodiments, the switching circuit includes a third switch 70 and a fourth switch 80, and the third switch 70 and the fourth switch 80 connect the input terminal 20 and the AC load terminal 32. When the AC load terminal 32 is in a single-phase load mode, the third switch 70 or the fourth switch 80 is closed; when the AC load terminal 32 is in a split-phase load mode, the third switch 70 and the fourth switch 80 are closed.

[0059] In this way, the control module can control the AC load terminal 32 to switch between the single-phase load mode and the split-phase load mode through the third switch 70 and the fourth switch 80 .

[0060] Specifically, the AC load end 32 includes a fourth phase line 321, a third grounding line 322 and a fifth phase line 323. The fourth phase line 321 is connected to the third phase line 223 and the second bidirectional ACDC module 42 through a third switch 70. The third grounding line 322 is respectively connected to the first grounding line 212, the second grounding line 222, the first bidirectional ACDC module 41 and the second bidirectional ACDC module 42. The fifth phase line 323 is respectively connected to the first phase line 211, the second phase line 221 and the first bidirectional ACDC module 41 through a fourth switch 80.

[0061] Furthermore, when the third switch 70 is closed and the fourth switch 80 is opened, the fourth phase line 321 and the third grounding line 322 form single-phase electricity to supply load equipment that requires a single-phase system. When the third switch 70 is opened and the fourth switch 80 is closed, the third grounding line 322 and the fifth phase line 323 can form another single-phase electricity to supply load equipment that requires a single-phase system. When the third switch 70 and the fourth switch 80 are both closed, the fourth phase line 321, the third grounding line 322 and the fifth phase line 323 can form split-phase electricity to supply load equipment that requires a split-phase system.

[0062] See also Figure 2 In some embodiments, the switching circuit also includes a battery 90. When the switching circuit is in the first mode, the second mode, or the third mode, the input terminal 20 is used to charge the battery 90. The control module 10 can also control the switching circuit to switch to a fourth mode. When the switching circuit is in the fourth mode, the battery 90 supplies power to the load terminal 30.

[0063] In this way, when all input terminals 20 cannot be connected to an external power source, the battery 90 can temporarily supply power to the load terminal 30 .

[0064] Specifically, the battery 90 is connected to the DC input terminal 23 through the first DCDC module 43, connected to the DC load terminal 31 through the second DCDC module 44, and connected to the single-phase input terminal 21, the split-phase input terminal 22 and the AC load terminal 32 through the first bidirectional ACDC module 41 and the second bidirectional ACDC module 42.

[0065] When the single-phase input terminal 21 is powered, the battery 90 can be charged through the first bidirectional ACDC module 41; when the split-phase input terminal 22 is powered, the battery 90 can be charged through the first bidirectional ACDC module 41 and the second bidirectional ACDC module 42. When the same current is input, since the voltage of the split-phase system is twice that of the single-phase system, the charging power can be twice as large, and the charging speed can also be twice as fast, so as to quickly charge and replenish the battery 90; when the DC input terminal 23 is powered, the battery 90 can be charged through the first DCDC module 43; when all input terminals 20 are powered off, the battery 90 can supply power to the AC load terminal 32 through the first bidirectional ACDC module 41 and the second bidirectional ACDC module 42, and supply power to the DC load terminal 31 through the second bidirectional ACDC module 42.

[0066] See also Figure 1 and Figure 2 In some embodiments, the control module is used to control the switch circuit to switch to the first mode when the single-phase input terminal 21 is connected to the single-phase AC power and the split-phase input terminal 22 and the DC input terminal 23 are disconnected from the outside.

[0067] In this way, when only the single-phase input terminal 21 is electrically connected to the single-phase mains, the control module can switch the switch circuit to the first mode.

[0068] Specifically, the single-phase input terminal 21 is connected to the AC load terminal 32 and the first bidirectional ACDC module 41 through the first switch 50, the other end of the first bidirectional ACDC module 41 is connected to the battery 90, the second bidirectional ACDC module 42 and the second DCDC module 44 respectively, the other end of the second bidirectional ACDC module 42 is connected to the AC load terminal 32, and the other end of the second DCDC module 44 is connected to the DC load terminal 31.

[0069] Further, when the single-phase input terminal 21 is connected to the single-phase mains power, the first switch 50 is closed and the second switch 60 is opened.

[0070] Among them, the first bidirectional ACDC module 41 is in the rectification mode, the single-phase input terminal 21 passes through the first switch 50 and charges the battery 90 through the first bidirectional ACDC module 41, and the first phase line 211 bypasses and is connected to the fifth phase line 323 of the AC load terminal 32 through the fourth switch 80, and the first ground line 212 bypasses and is connected to the third ground line 322 of the AC load terminal 32.

[0071] The second bidirectional ACDC module 42 is in the inverter mode, and the single-phase city power is rectified by the first bidirectional ACDC module 41 and then inverted again by the second bidirectional ACDC module 42 and connected to the fourth phase line 321 and the third ground line 322. At the same time, the second bidirectional ACDC module 42 adjusts the phase angle of the fourth phase line 321 to be 180° with the phase angle of the fifth phase line 323, so that the line voltage between the fourth phase line 321 and the fifth phase line 323 is twice that of the fourth phase line 321 and the third ground line 322. At this time, the fourth phase line 321, the third ground line 322 and the fifth phase line 323 form a split-phase power supply to the load equipment that needs a split-phase system.

[0072] In some embodiments, the control module is used to control the switch circuit to switch to the second mode when the split-phase input terminal 22 is electrically connected to the split-phase mains and the single-phase input terminal 21 and the DC input terminal 23 are disconnected from the outside.

[0073] In this way, when only the split-phase input terminal 22 is electrically connected to the single-phase mains, the control module can switch the switch circuit to the second mode.

[0074] Specifically, the split-phase input terminal 22 is connected to the AC load terminal 32 through the second switch 60, the second phase line 221 and the second ground line 222 of the split-phase input terminal 22 are connected to the first bidirectional ACDC module 41 through the second switch 60, the second ground line 222 and the third phase line 223 of the split-phase input terminal 22 are connected to the second bidirectional ACDC module 42 through the second switch 60, the other ends of the first bidirectional ACDC module 41 and the second bidirectional ACDC module 42 are respectively connected to the battery 90 and the second DCDC module 44, and the other end of the second DCDC module 44 is connected to the DC load terminal 31.

[0075] Further, when the split-phase input terminal 22 is connected to the split-phase mains, the first switch 50 is opened and the second switch 60 is closed.

[0076] Among them, the first bidirectional ACDC module 41 and the second bidirectional ACDC module 42 are both in rectification mode. After the split-phase input terminal 22 passes through the first switch 50, the battery 90 is charged simultaneously through the first bidirectional ACDC module 41 and the second bidirectional ACDC module 42. The battery 90 receives a double power charging effect. At the same time, after the split-phase input terminal 22 passes through the first switch 50, the DC load terminal 31 is powered simultaneously through the first bidirectional ACDC module 41 and the second bidirectional ACDC module 42.

[0077] The second phase line 221 is bypassed and connected to the fifth phase line 323 of the AC load terminal 32 through the fourth switch 80, the second grounding line 222 is bypassed and connected to the third grounding line 322 of the AC load terminal 32, and the third phase line 223 is bypassed and connected to the fourth phase line 321 of the AC load terminal 32 through the third switch 70. At this time, the fourth phase line 321, the third grounding line 322 and the fifth phase line 323 form a split-phase electricity to supply the load equipment that requires a split-phase system.

[0078] See also Figure 1 and Figure 2 In some embodiments, the control module is used to control the switch circuit to switch to the third mode when the DC input terminal 23 is electrically connected to the DC power supply and the single-phase input terminal 21 and the split-phase input terminal 22 are disconnected from the outside.

[0079] In this way, when only the DC input terminal 23 is electrically connected to the DC power supply, the control module can switch the switch circuit to the third mode.

[0080] Specifically, the DC input terminal 23 includes a power line 231 and a signal line 232 , and both the power line 231 and the signal line 232 are connected to the first DCDC module 43 .

[0081] The DC input terminal 23 is connected to the battery 90 through the first DCDC module 43. After passing through the first DCDC module 43, the DC input terminal 23 is connected to the AC load terminal 32 through the first bidirectional ACDC module 41 and the second bidirectional ACDC module 42. After passing through the first DCDC module 43, the DC input terminal 23 is connected to the DC load terminal 31 through the second DCDC module 44.

[0082] Further, when the DC input terminal 23 is connected to DC power, the DC input terminal 23 is connected to the first bidirectional ACDC module 41 and the second bidirectional ACDC module 42 respectively through the first DCDC module 43, and the first bidirectional ACDC module 41 and the second bidirectional ACDC module 42 are both in the inverter mode. The first bidirectional ACDC module 41 is respectively connected to the fifth phase line 323 and the third grounding line 322 of the AC load terminal 32 to form single-phase power, and the second bidirectional ACDC module 42 is respectively connected to the fourth phase line 321 and the third grounding line 322 of the AC load terminal 32 to form single-phase power. At the same time, the second bidirectional ACDC module 42 adjusts the phase angle of the fourth phase line 321 to be 180° with the phase angle of the fifth phase line 323, then the line voltage between the fourth phase line 321 and the fifth phase line 323 is twice that of the fourth phase line 321 and the third grounding line 322. At this time, the fourth phase line 321, the third grounding line 322 and the fifth phase line 323 form split-phase power to supply load equipment that requires split-phase control.

[0083] In addition, the DC power inputted from the DC input terminal 23 is regulated by the first DCDC module 43 to charge the battery 90 , and the DC power inputted from the DC input terminal 23 is regulated by the first DCDC module 43 and regulated again by the second DCDC module 44 to supply power to the DC load terminal 31 .

[0084] The DC power connected to the DC input terminal 23 may be photovoltaic power generation or a DC charging pile, and the first DCDC module 43 may be used to monitor the type of the DC power connected to the DC input terminal 23 .

[0085] Furthermore, when the DC power connected to the DC output terminal is photovoltaic power generation, the first DCDC module 43 detects the photovoltaic power generation input, starts the MPPT mode, and charges the battery 90. The MPPT mode refers to the maximum power point tracking mode. In the photovoltaic power generation system, since the output power and output voltage of the photovoltaic array have a nonlinear relationship and are affected by meteorological conditions (such as irradiation and temperature), the MPPT module can adjust the output voltage of the component so that the photovoltaic component outputs the maximum power, thereby improving the conversion rate of the photovoltaic system.

[0086] When the DC power connected to the DC output terminal is a DC charging pile, it can be communicated with the first DCDC module 43 through the adapter accessories equipped with the DC charging pile to realize fast charging of the battery 90.

[0087] In some embodiments, the control module is used to control the switch circuit to switch to the second mode when the single-phase input terminal 21 is electrically connected to the single-phase AC power, the split-phase input terminal 22 is electrically connected to the split-phase AC power, and the DC input terminal 23 is disconnected from the outside.

[0088] In this way, when the single-phase input terminal 21 is electrically connected to the single-phase mains power and the split-phase input terminal 22 is electrically connected to the split-phase mains power at the same time, the control module can switch the switch circuit to the second mode to ensure rapid charging of the battery 90.

[0089] Specifically, when the single-phase input terminal 21 is electrically connected to the single-phase AC power and the split-phase input terminal 22 is electrically connected to the split-phase AC power at the same time, the control circuit first switches to the second mode, that is, the split-phase AC power is used to power the load terminal 30 and the battery 90. If the split-phase AC power can bear all loads at this time, only the split-phase AC power can be used to power the load terminal 30 and the battery 90, that is, only the second switch 60 is closed and the first switch 50 is disconnected.

[0090] If the split-phase AC power cannot support all loads at this time, the control circuit can be switched to the first mode and the second mode to work simultaneously, that is, single-phase AC power and split-phase AC power are used to power the load end 30 and the battery 90 at the same time. At this time, the first switch 50 and the second switch 60 should be closed at the same time.

[0091] See also Figure 1In some embodiments, the control module is used to control the switch circuit to switch to the second mode and the third mode when the single-phase input terminal 21 is electrically connected to the single-phase AC power, the split-phase input terminal 22 is electrically connected to the split-phase AC power, and the DC input terminal 23 is electrically connected to the DC power supply.

[0092] In this way, when the single-phase input terminal 21 is electrically connected to the single-phase AC power, the split-phase input terminal 22 is electrically connected to the split-phase AC power, and the DC input terminal 23 is electrically connected to the DC power supply, the control module can switch the switching circuit to the second mode and the third mode to work simultaneously to reduce the use of AC power and reduce electricity bills.

[0093] Specifically, when the single-phase input terminal 21 is electrically connected to the single-phase AC power, the split-phase input terminal 22 is electrically connected to the split-phase AC power, and the DC input terminal 23 is electrically connected to the DC power at the same time, the control circuit first switches to the third mode, that is, using DC power to power the load terminal 30 and the battery 90. If the DC power can bear all loads at this time, only DC power can be used to power the load terminal 30 and the battery 90; if the DC power cannot bear all loads at this time, the control circuit can switch to the second mode and the third mode again to work simultaneously, that is, using DC power and split-phase AC power to power the load terminal 30 and the battery 90 at the same time, and the second switch 60 should be closed at this time.

[0094] Furthermore, when the switch circuit is switched to the second mode and the third mode to work simultaneously, in order to reduce electricity costs, DC power should be used as a priority to power the load terminal 30 and the battery 90, and the insufficient load is supplemented by split-phase AC power.

[0095] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0096] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, unless otherwise clearly and specifically defined.

[0097] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A power supply circuit for energy storage power supply, characterized in that: The power supply circuit includes a switching circuit and a control module, an input end and a load end connected to the switching circuit. The input end includes a single-phase input end, a split-phase input end and a DC input end. The control module is used to control the switching circuit to switch between a first mode, a second mode and a third mode. When the switching circuit is in the first mode, the single-phase input end is connected to the load end; when the switching circuit is in the second mode, the split-phase input end is connected to the load end; when the switching circuit is in the third mode, the DC input end is connected to the load end.

2. The power supply circuit according to claim 1, characterized in that: The switch circuit includes a first switch, the first switch is connected to the single-phase input end and the load end, and when the switch circuit is in the first mode, the control module controls the first switch to be closed.

3. The power supply circuit according to claim 1, characterized in that: The switch circuit includes a second switch, and the second switch is connected to the split-phase input terminal and the load terminal. When the switch circuit is in the second mode, the control module controls the second switch to close.

4. The power supply circuit according to claim 1, characterized in that: The load end includes a DC load end and an AC load end, and the DC load end and the AC load end are respectively connected to the input end.

5. The power supply circuit according to claim 4, characterized in that: The control module may also be used to control the AC load end to switch between a single-phase load mode and a split-phase load mode.

6. The power supply circuit according to claim 5, characterized in that: The switching circuit includes a third switch and a fourth switch, and the third switch and the fourth switch are connected to the input end and the AC load end. When the AC load end is in a single-phase load mode, the third switch or the fourth switch is closed; when the AC load end is in a split-phase load mode, the third switch and the fourth switch are closed.

7. The power supply circuit according to claim 1, characterized in that: The switching circuit also includes a battery. When the switching circuit is in the first mode, the second mode, or the third mode, the input end is used to charge the battery. The control module can also control the switching circuit to switch to a fourth mode. When the switching circuit is in the fourth mode, the battery supplies power to the load end.

8. The power supply circuit according to claim 1, characterized in that: The control module is used for controlling the switch circuit to switch to the first mode when the single-phase input terminal is electrically connected to the single-phase mains and the split-phase input terminal and the DC input terminal are disconnected from the outside.

9. The power supply circuit according to claim 1, characterized in that: The control module is used for controlling the switch circuit to switch to the second mode when the split-phase input terminal is electrically connected to the split-phase mains and the single-phase input terminal and the DC input terminal are disconnected from the outside.

10. The power supply circuit according to claim 1, characterized in that: The control module is used for controlling the switch circuit to switch to the third mode when the DC input terminal is electrically connected to a DC power supply and the single-phase input terminal and the split-phase input terminal are disconnected from the outside.

11. The power supply circuit according to claim 1, characterized in that: The control module is used to control the switch circuit to switch to the second mode when the single-phase input terminal is electrically connected to the single-phase mains, the split-phase input terminal is electrically connected to the split-phase mains, and the DC input terminal is disconnected from the outside.

12. The power supply circuit according to claim 1, characterized in that: The control module is used to control the switch circuit to switch to the second mode and the third mode when the single-phase input terminal is electrically connected to the single-phase mains, the split-phase input terminal is electrically connected to the split-phase mains, and the DC input terminal is electrically connected to the DC power supply.

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