Hybrid control circuit and control method

Abstract

Provided in the present application are a hybrid control circuit and a control method. The circuit comprises: battery connection ends, grid connection ends, load connection ends, an inductor, a change-over switch and power switches, the inductor and the change-over switch being arranged between the battery connection ends and the load connection ends, and between the grid connection ends and the load connection ends, and the power switches being respectively arranged between the battery connection ends and the inductor, between the battery connection ends and the grid connection ends, and between the change-over switch and the load connection ends. In cases where information to be processed indicates that the circuit involves alternating current, each power switch is controlled to be turned on and off on the basis of the timing of the alternating current, so as to implement mains power supply, mains power charging or grid connection.

Description

Hybrid control circuit and control method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 2023106954953, filed on June 12, 2023, entitled “Hybrid Control Circuit and Control Method,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present application relates to the field of new energy technology, and in particular to a hybrid control circuit and a control method. Background Art

[0004] With the continuous development of the new energy industry, clean energy such as photovoltaics and wind power has been increasingly widely used. However, since the power output of clean energy such as photovoltaics and wind power is not stable, they often need to be supplied by the mains power grid or energy storage batteries to ensure the stability of power output.

[0005] Currently, power supply circuits require independent circuit units such as rectifiers, power factor correction (PFC), inverters, and DC-DC converters to achieve stable power output. However, this results in an excessive number of components in the circuit and a large hardware footprint.

[0006] Summary of the Invention

[0007] The present application provides a hybrid control circuit and control method to solve the defects of excessive components and large hardware volume in the power supply circuit in the prior art. While achieving stable power output, the number of components is reduced, thereby reducing the hardware volume.

[0008] The present application provides a hybrid control circuit, the circuit comprising: a battery connection terminal, a grid connection terminal, a load connection terminal, an inductor, a switch, and a power switch;

[0009] The inductor and the switch are provided between the battery connection terminal and the load connection terminal, and between the grid connection terminal and the load connection terminal;

[0010] The power switches are respectively provided between the battery connection terminal and the inductor, between the battery connection terminal and the grid connection terminal, and between the switch and the load connection terminal;

[0011] When the information to be processed indicates that the circuit involves alternating current, the switching switch is switched to a state in which control is not achieved through the inductor, and each power switch is controlled to be turned off and on based on the alternating current timing, so as to achieve mains power supply, mains power charging, or grid connection;

[0012] When the information to be processed indicates that only direct current is involved in the circuit, the switching switch is switched to a state where control is achieved through the inductor; and the inductor is charged and discharged by sequentially turning off and closing each of the power switches based on the charge and discharge cycle of the inductor, thereby achieving battery power supply or battery charging.

[0013] According to a hybrid control circuit provided by the present application, the switch includes a first end, a second end, and a third end;

[0014] The first end is connected to one end of the inductor; the second end is connected to one end of the grid connection end, the other end of the grid connection end is connected to the other end of the inductor, and the third end is connected to the load connection end through the power switch.

[0015] According to a hybrid control circuit provided by the present application, the circuit further includes a transfer switch, and the power switch includes: a first power switch, a second power switch, a third power switch, and a fourth power switch;

[0016] Two ends of the battery connection terminal are respectively connected to one end of the first power switch and one end of the second power switch, and two ends of the load connection terminal are respectively connected to one end of the third power switch and one end of the fourth power switch; the transfer switch is connected in parallel with the first power switch, the inductor, the switching switch, and the third power switch;

[0017] The third end is connected to the other end of the third power switch and the other end of the fourth power switch; one end of the second power switch is connected to one end of the fourth power switch;

[0018] One end of the grid connection end is connected to the other end of the first power switch and the other end of the second power switch, and the other end of the first power switch and the other end of the second power switch are connected to the inductor.

[0019] The present application provides a control method, which is applied to any of the above hybrid control circuits;

[0020] Methods include:

[0021] Get information to be processed;

[0022] When the information to be processed indicates that AC power is involved in the circuit, controlling the switch to a state where the control operation is not performed by the inductor, and controlling the turning off and on of each power switch based on the AC power timing to achieve AC power supply, AC power charging, or grid connection;

[0023] When the information to be processed indicates that only direct current is involved in the circuit, the switching switch is controlled to a state where the control operation is implemented through the inductor, and the timing of the power switches being turned off and closed based on the inductor charge and discharge cycle is controlled to enable the inductor to charge and discharge, thereby realizing battery power supply or battery charging.

[0024] According to a control method provided by the present application, the battery connection terminal is connected to a battery, and the load connection terminal is connected to a load; the information to be processed includes load power information and energy recovery information, wherein the load power information is information indicating whether the load has power demand, and the energy recovery information is information indicating whether energy recovery is required;

[0025] When the load power information indicates that the load has no power demand and the energy recovery information indicates that energy recovery is required, the information to be processed indicates that only direct current is involved in the circuit;

[0026] The step of controlling the switching switch to a state where the control operation is implemented through the inductor, controlling the timing of the power switches to be turned off and on based on the inductor charge and discharge cycle to charge and discharge the inductor, and implementing battery power supply or battery charging, includes:

[0027] The first terminal and the third terminal are controlled to be conductive, the conversion switch is controlled to be disconnected, and based on the step-up and step-down stages, the timing of the power switches being turned off and on based on the inductor charge and discharge cycle is controlled so that the electric energy corresponding to the load is stored in the battery.

[0028] According to a control method provided by the present application, the battery connection terminal is further connected to a photovoltaic cell, and the grid connection terminal is connected to a mains power grid; the information to be processed further includes photovoltaic power generation information, wherein the photovoltaic power generation information is information indicating whether the photovoltaic cell is generating electricity;

[0029] In a case where the energy recovery information indicates that energy recovery is not required and the photovoltaic power generation information indicates that the photovoltaic cell generates electricity, the information to be processed indicates that alternating current is involved in the circuit;

[0030] The step of controlling the switching switch to a state where the control operation is not achieved through the inductor, and controlling the turning off and on of each power switch based on the AC timing to achieve mains power supply, mains charging or grid connection includes:

[0031] Based on the AC power timing sequence, control the first power switch and the fourth power switch to be closed, and the second power switch and the third power switch to be opened; or control the second power switch and the third power switch to be closed, and the first power switch and the fourth power switch to be opened;

[0032] The second end and the third end are controlled to be conductive, and the conversion switch is controlled to be closed, so that the electric energy generated by the photovoltaic cell is integrated into the commercial power grid.

[0033] According to a control method provided by the present application, the information to be processed further includes battery power information and electricity price information, the battery power information is information indicating whether the battery power is sufficient, and the electricity price information is information indicating whether the current electricity price is lower than the preset electricity price threshold;

[0034] When the photovoltaic power generation information indicates that the photovoltaic cell is not generating electricity, the battery power information indicates that the battery power is insufficient, and the electricity price information indicates that the current electricity price is lower than a preset electricity price threshold, the information to be processed indicates that alternating current is involved in the circuit;

[0035] The step of controlling the switching switch to a state where the control operation is not achieved through the inductor, and controlling the turning off and on of each power switch based on the AC timing to achieve mains power supply, mains charging or grid connection, further includes:

[0036] Based on the AC power timing sequence, control the first power switch and the fourth power switch to be closed, and the second power switch and the third power switch to be opened; or control the second power switch and the third power switch to be closed, and the first power switch and the fourth power switch to be opened;

[0037] The second end and the third end are controlled to be conductive, and the conversion switch is controlled to be closed, so that the commercial power grid charges the battery.

[0038] According to a control method provided by the present application, the information to be processed further includes power information, wherein the power information is information indicating whether the output power of the photovoltaic cell is not less than the power corresponding to the load;

[0039] When the load power information indicates that the load has a power demand, and the power information indicates that the output power of the photovoltaic cell is not less than the power corresponding to the load, the information to be processed indicates that only direct current is involved in the circuit;

[0040] The step of controlling the switching switch to a state where the control operation is realized through the inductor, controlling the timing of the power switches to be turned off and on based on the inductor charge and discharge cycle to charge and discharge the inductor and realize battery power supply or battery charging, further includes:

[0041] The first end and the third end are controlled to be conductive, the conversion switch is controlled to be disconnected, and based on the step-up and step-down stages, the timing of the power switches being turned off and on based on the inductor charge and discharge cycle is controlled so that the electric energy output by the photovoltaic cell can power the load.

[0042] According to a control method provided by the present application, the step of controlling the timing of the power switches to be turned off and on based on the inductor charge and discharge cycle based on the step-up and step-down phase, so that the power energy output by the photovoltaic cell can power the load, includes:

[0043] In the boost phase, the first power switch and the fourth power switch are controlled to be closed, and the second power switch and the third power switch are controlled to be opened, so that the electric energy output by the photovoltaic cell charges the inductor;

[0044] controlling the fourth power switch to be opened, controlling the third power switch to be closed, controlling the first power switch to remain closed, and controlling the second power switch to remain open, so that the power output by the photovoltaic cell and the inductor together supply power to the load;

[0045] In the step-down phase, the first power switch and the third power switch are controlled to be closed, and the second power switch and the fourth power switch are controlled to be opened, so that the electric energy output by the photovoltaic cell is used to supply power to the load through the inductor;

[0046] The first power switch is controlled to be opened, the second power switch is controlled to be closed, the third power switch is controlled to remain closed, and the fourth power switch is controlled to remain opened, so that the inductor supplies power to the load.

[0047] According to a control method provided by the present application, the information to be processed further includes battery power information and charging price information, wherein the charging price information is information indicating whether the current electricity price is consistent with the preset charging price;

[0048] When the power information indicates that the output power of the photovoltaic cell is less than the power corresponding to the load, the battery power information indicates that the battery power is sufficient, and the charging price information indicates that the current electricity price is higher than the preset charging price, the information to be processed indicates that only direct current is involved in the circuit;

[0049] The step of controlling the switching switch to a state where the control operation is implemented through the inductor, controlling the timing of the power switches to be turned off and on based on the inductor charge and discharge cycle to charge and discharge the inductor, and implementing battery power supply or battery charging, includes:

[0050] The first end and the third end are controlled to be conductive, the conversion switch is controlled to be disconnected, and based on the step-up and step-down stages, the timing of the power switches being turned off and on based on the inductor charge and discharge cycle is controlled so that the electric energy output by the battery can power the load.

[0051] According to a control method provided by the present application, when the battery power information indicates that the battery power is insufficient, or when the charging price information indicates that the current electricity price is not higher than the preset charging price, the information to be processed indicates that the circuit involves alternating current;

[0052] The step of controlling the switching switch to a state where the control operation is not achieved through the inductor, and controlling the turning off and on of each power switch based on the AC timing to achieve mains power supply, mains charging or grid connection includes:

[0053] Based on the AC power timing sequence, control the first power switch and the fourth power switch to be closed, and the second power switch and the third power switch to be opened; or control the second power switch and the third power switch to be closed, and the first power switch and the fourth power switch to be opened;

[0054] The second end and the third end are controlled to be conductive, and the conversion switch is controlled to be closed, so that the electric energy output by the commercial power grid supplies power to the load.

[0055] The present application provides a hybrid control circuit and control method, wherein the hybrid control circuit includes: a battery connection terminal, a grid connection terminal, a load connection terminal, an inductor, a switching switch, and a power switch. The inductor and the switching switch are provided between the battery connection terminal and the load connection terminal, and between the grid connection terminal and the load connection terminal. A power switch is provided between the battery connection terminal and the inductor, between the battery connection terminal and the grid connection terminal, and between the switching switch and the load connection terminal. When the information indication circuit to be processed involves AC power, the switching switch is switched to a state where control is not achieved through the inductor, and the power switches are controlled to be turned off and on based on the AC power timing to achieve mains power supply, mains charging, or grid connection. When the information indication circuit to be processed involves only DC power, the switching switch is switched to a state where control is achieved through the inductor, and the power switches are turned off and on based on the timing of the inductor charge and discharge cycles to charge and discharge the inductor, thereby achieving battery power supply or battery charging.

[0056] In this way, the hybrid control circuit, consisting solely of an inductor, a switch, and a power switch, can achieve control over mains power supply, mains charging, grid connection, battery power supply, and battery charging. Hybrid control is possible with only the inductor, a switch, and a power switch. Compared to current power supply circuits, this eliminates the need for separate circuit units, reducing both the number of components in the hybrid control circuit and the hardware size of the hybrid control circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0058] FIG1 is a schematic diagram of a structure of a hybrid control circuit provided by the present application;

[0059] FIG2 is a flow chart of a control method provided by the present application;

[0060] FIG3 is a second flow chart of the control method provided by the present application;

[0061] FIG4 is one of the equivalent circuit diagrams of the hybrid control circuit provided in this application;

[0062] FIG5 is a second schematic diagram of an equivalent circuit of a hybrid control circuit provided by the present application;

[0063] FIG6 is a third schematic diagram of an equivalent circuit of a hybrid control circuit provided in the present application;

[0064] FIG7 is a fourth schematic diagram of an equivalent circuit of a hybrid control circuit provided in the present application;

[0065] FIG8 is a fifth schematic diagram of an equivalent circuit of the hybrid control circuit provided in this application.

[0066] Reference numerals: 101 : inductor; 102 : changeover switch; 103 : first power switch; 104 : second power switch; 105 : third power switch; 106 : fourth power switch; 107 : transfer switch. DETAILED DESCRIPTION

[0067] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0068] In order to reduce the number of components and thus the hardware volume while achieving stable power output, the present invention provides a hybrid control circuit and control method.

[0069] As shown in Figure 1, an embodiment of the present application provides a hybrid control circuit, which includes: a battery connection terminal (battery connection terminal 1 and battery connection terminal 2 in Figure 1), a grid connection terminal (grid connection terminal 3 and grid connection terminal 4 in Figure 1), a load connection terminal (load connection terminal 5 and load connection terminal 6 in Figure 1), an inductor 101, a switching switch 102 and a power switch, wherein, in Figure 1, the power switches include 4, specifically a first power switch 103, a second power switch 104, a third power switch 105 and a fourth power switch 106.

[0070] The inductor and the switch are provided between the battery connection terminal and the load connection terminal, and between the grid connection terminal and the load connection terminal.

[0071] As shown in Figure 1, an inductor 101 and a switch 101 are provided between battery connection terminals 1 and 2 and load connection terminals 5 and 6. An inductor 101 and a switch 101 are provided between grid connection terminals 3 and 4 and load connection terminals 5 and 6.

[0072] In one embodiment, only one inductor 101 and one switch 101 are provided between the battery connection terminals 1 and 2 and the load connection terminals 5 and 6 , and between the grid connection terminals 3 and 4 and the load connection terminals 5 and 6 .

[0073] The power switches are respectively provided between the battery connection terminal and the inductor, between the battery connection terminal and the grid connection terminal, and between the switch and the load connection terminal.

[0074] As shown in Figure 1, a first power switch 103 can be provided between battery connection terminal 1 and inductor 101, a second power switch 104 can be provided between battery connection terminal 2 and inductor 101, the power switch provided between battery connection terminal 1 and grid connection terminal 3 is first power switch 103, and the power switch provided between battery connection terminal 2 and grid connection terminal 4 is fourth power switch 106. A third power switch 105 can be provided between switch 102 and load connection terminal 5, and a fourth power switch 106 can be provided between switch 102 and load connection terminal 6.

[0075] In one embodiment, a plurality of power switches are respectively provided between the battery connection terminal and the inductor, between the battery connection terminal and the grid connection terminal, and between the switch and the load connection terminal.

[0076] The power switch provided between the battery connection terminal and the inductor may be the same as or different from the power switch provided between the battery connection terminal and the grid connection terminal, and may be specifically provided according to actual usage.

[0077] For example, the power switch provided between the battery connection terminal and the inductor is the same as the power switch between the battery connection terminal and the grid connection terminal. Two power switches are provided between the battery connection terminal and the inductor, between the battery connection terminal and the grid connection terminal, and between the switching switch and the load connection terminal. In this case, the number of power switches is 8.

[0078] When the information to be processed indicates that alternating current is involved in the circuit, the switching switch is switched to a state where control is not achieved through the inductor, and the turning off and closing of each power switch based on the alternating current timing is controlled to achieve AC power supply, AC charging or grid connection.

[0079] When AC power is involved in the circuit indicating the information to be processed, that is, when the mains power grid connected to the grid connection end is connected to a hybrid control circuit, the switch can be switched to a state where control is not achieved through inductance, and then, for mains power supply, mains charging or grid connection, the shutdown and closing of each power switch based on the AC power timing can be controlled.

[0080] When the information to be processed indicates that only direct current is involved in the circuit, the switching switch is switched to a state where control is achieved through the inductor; and the inductor is charged and discharged by sequentially turning off and closing each of the power switches based on the charge and discharge cycle of the inductor, thereby achieving battery power supply or battery charging.

[0081] When the information to be processed indicates that only direct current is involved in the circuit, that is, when the mains power grid connected to the grid connection end is not connected to the hybrid control circuit, the switch can be switched to a state where control is achieved through inductance, and then, for battery power supply or battery charging, the shutdown and closing of each power switch based on the AC timing can be controlled.

[0082] It can be seen that in this embodiment, the hybrid control circuit only includes an inductor, a switching switch and a power switch to realize the control of AC power supply, AC charging, grid connection, battery power supply, battery charging, etc., that is, hybrid control can be realized when the components only include an inductor, a switching switch and a power switch. Compared with the current power supply circuit, there is no need to set up different circuit units, which not only reduces the number of components in the hybrid control circuit, but also reduces the hardware volume of the hybrid control circuit.

[0083] As an implementation of an embodiment of the present application, as shown in FIG1 , the switch 102 includes a first end 21 , a second end 22 and a third end 23 .

[0084] The first end is connected to one end of the inductor; the second end is connected to one end of the grid connection end, the other end of the grid connection end is connected to the other end of the inductor, and the third end is connected to the load connection end through the power switch.

[0085] As shown in Figure 1, the first end 21 is connected to one end of the inductor 101, the second end 22 is connected to the grid connection terminal 4, the grid connection terminal 3 is connected to the other end of the inductor 101, the third end 23 is connected to the load connection terminal 6 through the fourth power switch 106, and the third end 23 is connected to the load connection terminal 5 through the third power switch 105.

[0086] As an implementation of an embodiment of the present application, as shown in FIG1 , the circuit further includes a transfer switch 107 , and the power switches include a first power switch 103 , a second power switch 104 , a third power switch 105 and a fourth power switch 106 .

[0087] Two ends of the battery connection end are respectively connected to one end of the first power switch and one end of the second power switch, and two ends of the load connection end are respectively connected to one end of the third power switch and one end of the fourth power switch; the conversion switch is connected in parallel with the first power switch, the inductor, the switching switch and the third power switch.

[0088] The battery connection terminal 1 is connected to one end of the first power switch 103 , the battery connection terminal 2 is connected to one end of the second power switch 104 , the load connection terminal 5 is connected to one end of the third power switch 105 , and the load connection terminal 6 is connected to one end of the fourth power switch 106 .

[0089] The transfer switch 107 is connected in parallel with the first power switch 103, the inductor 101, the switching switch 102, and the third power switch 105. One end of the transfer switch 107 is connected to the battery connection terminal 1 and one end of the first power switch 103, and the other end of the transfer switch 107 is connected to the load connection terminal 5 and one end of the third power switch 105. In other words, the battery connection terminal 1 and the load connection terminal 5 are connected through the transfer switch 107.

[0090] The third terminal is connected to the other terminal of the third power switch and the other terminal of the fourth power switch; one terminal of the second power switch is connected to one terminal of the fourth power switch. The battery connection terminal 2 is connected to the load connection terminal 6.

[0091] The third end 23 is connected to the other end of the third power switch 105 and the other end of the fourth power switch 106 , and one end of the second power switch 105 is connected to one end of the fourth power switch 106 .

[0092] One end of the grid connection end is connected to the other end of the first power switch and the other end of the second power switch, and the other end of the first power switch and the other end of the second power switch are connected to the inductor.

[0093] The grid connection terminal 3 is connected to the other end of the first power switch 103 and the other end of the second power switch 104 . The other end of the first power switch 103 and the other end of the second power switch 104 are connected to the inductor 101 .

[0094] A control method provided in an embodiment of the present application is introduced below. The control method described below and the hybrid control circuit described above can refer to each other.

[0095] As shown in FIG2 , an embodiment of the present application provides a control method, which is applied to any of the hybrid control circuits described above and may include the following steps.

[0096] S201, obtaining information to be processed.

[0097] In order to be able to implement control corresponding to different situations, information to be processed can be obtained, where the information to be processed may include load power information, energy recovery information, photovoltaic power generation information, battery power information, electricity price information, charging electricity price information, power information, etc.

[0098] S202, when the information to be processed indicates that AC power is involved in the circuit, controls the switching switch to a state where the control operation is not achieved through inductance, and controls the turning off and closing of each power switch based on the AC power timing to achieve AC power supply, AC power charging or grid connection.

[0099] When AC power is involved in the circuit indicating the information to be processed, that is, when the mains power grid connected to the grid connection end is connected to a hybrid control circuit, the switch can be switched to a state where control is not achieved through inductance, and then, for mains power supply, mains charging or grid connection, the shutdown and closing of each power switch based on the AC power timing can be controlled.

[0100] Mains power supply refers to the supply of power to the load connected to the load terminal via the mains grid. Mains charging refers to the supply of power to the battery connected to the battery terminal via the mains grid. Grid connection refers to the integration of the power generated by the photovoltaic cell connected to the battery terminal into the mains grid.

[0101] S203, when the information to be processed indicates that only direct current is involved in the circuit, controlling the switching switch to a state where the control operation is implemented through the inductor, controlling the timing of the power switches to be turned off and closed based on the inductor charge and discharge cycle, so that the inductor is charged and discharged, and battery power supply or battery charging is implemented.

[0102] When the information to be processed indicates that only direct current is involved in the circuit, that is, when the mains power grid connected to the grid connection end is not connected to the hybrid control circuit, the switch can be switched to a state where control is achieved through inductance, and then, for battery power supply or battery charging, the shutdown and closing of each power switch based on the AC timing can be controlled.

[0103] Battery power supply can be provided by photovoltaic cells to the load connected to the load connection terminals (photovoltaic power supply). Alternatively, battery power supply can be provided by storage batteries to the load connected to the load connection terminals (battery power supply). Battery charging is the process of charging the battery with the electrical energy corresponding to the load connection terminals.

[0104] It can be seen that in this embodiment, the hybrid control circuit that implements the above-mentioned control method only includes an inductor, a switching switch and a power switch, so as to realize the control of AC power supply, AC charging, grid connection, battery power supply, battery charging, etc., that is, hybrid control can be realized when the components only include an inductor, a switching switch and a power switch. Compared with the current power supply circuit, there is no need to set up different circuit units, which not only can reduce the number of components in the hybrid control circuit, but also reduce the hardware volume of the hybrid control circuit.

[0105] To facilitate understanding of the control method provided in the embodiment of the present application, the control method provided in the embodiment of the present application is introduced below in conjunction with Figure 3.

[0106] As shown in FIG3 , the control method provided in the embodiment of the present application may include the following steps.

[0107] S301, determining whether the load has power demand.

[0108] The load power information is information indicating whether the load has a power demand. Step S301 is to determine the information indicated by the load power information. If the load does not have a power demand, steps S302 to S309 may be executed. If the load has a power demand, steps S310 to S315 may be executed.

[0109] S302: Determine whether energy recovery is required.

[0110] The energy recovery information is information indicating whether energy recovery is required. The above step S302 is to determine the information indicated by the energy recovery information. If energy recovery is required, step S303 can be executed. If energy recovery is not required, step S304 can be executed.

[0111] S303, executing battery charging.

[0112] S304, determining whether the photovoltaic cell is generating electricity.

[0113] Photovoltaic power generation information is information indicating whether the photovoltaic cell is generating electricity. Step S304 is to determine the information indicated by the photovoltaic power generation information. If the photovoltaic cell is generating electricity, step S305 may be executed. If the photovoltaic cell is not generating electricity, step S306 may be executed.

[0114] S305, executing grid connection.

[0115] S306: Determine whether the battery power is sufficient.

[0116] The battery power information is information indicating whether the battery power is sufficient. The above step S306 is to determine the information represented by the battery power information. If the battery power is sufficient, step S307 can be executed. If the battery power is insufficient, step S308 can be executed.

[0117] S307, end control.

[0118] S308: Determine whether the current electricity price is lower than a preset electricity price threshold.

[0119] The electricity price information is information about whether the current electricity price is lower than the preset electricity price threshold. The above step S308 is the information represented by the judgment electricity price information. When the current electricity price is lower than the preset electricity price threshold, step S309 can be executed. When the current electricity price is not lower than the preset electricity price threshold, step S307 can be executed.

[0120] S309, performing AC charging.

[0121] S310, determining whether the output power of the photovoltaic cell is not less than the power corresponding to the load.

[0122] The power information indicates whether the output power of the photovoltaic cell is not less than the power corresponding to the load. Step S310 above determines the information represented by the power information. If the output power of the photovoltaic cell is not less than the power corresponding to the load, step S311 may be executed. If the output power of the photovoltaic cell is less than the power corresponding to the load, step S312 may be executed.

[0123] S311, execute photovoltaic power supply.

[0124] S312, determining whether the battery power is sufficient.

[0125] The battery power information is information indicating whether the battery power is sufficient. The above step S312 is for determining the information indicated by the battery power information. If the battery power is sufficient, step S313 can be executed. If the battery power is insufficient, step S314 can be executed.

[0126] S313: Determine whether the current electricity price is higher than the preset charging electricity price.

[0127] The charging price information indicates whether the current electricity price is higher than the preset charging price. The preset charging price can be the price set by the user based on actual usage needs, or the price corresponding to the last time the battery was charged. Both are reasonable.

[0128] The above step S313 is to determine the information represented by the charging electricity price information. When the current electricity price is higher than the preset charging electricity price, step S315 can be executed. When the current electricity price is not higher than the preset charging electricity price, step S314 can be executed.

[0129] S314, power supply from the grid is executed.

[0130] S315, executing battery power supply.

[0131] It can be seen that in this embodiment, different control operations can be performed according to different information to be processed, thereby realizing hybrid control with fewer components.

[0132] As an implementation method of an embodiment of the present application, the battery connection end is connected to the battery, and the load connection end is connected to the load; the information to be processed includes load power information and energy recovery information, wherein the load power information is information indicating whether the load has power demand, and the energy recovery information is information indicating whether energy needs to be recovered.

[0133] When the load power information indicates that the load has no power demand and the energy recovery information indicates that energy recovery is required, that is, in the case of step S303 above, the information to be processed indicates that only direct current is involved in the circuit;

[0134] The step of controlling the switching switch to a state where the control operation is implemented through the inductor, controlling the timing of the power switches to be turned off and on based on the inductor charge and discharge cycle to charge and discharge the inductor and implement battery power supply or battery charging may include:

[0135] The first terminal and the third terminal are controlled to be conductive, the conversion switch is controlled to be disconnected, and based on the step-up and step-down stages, the timing of the power switches being turned off and on based on the inductor charge and discharge cycle is controlled so that the electric energy corresponding to the load is stored in the battery.

[0136] The step of controlling the sequential turning off and on of each of the power switches based on the inductor charge and discharge cycle in the step-up and step-down phases so that the electric energy corresponding to the load is stored in the battery may include:

[0137] In the boost phase, the second power switch and the third power switch are controlled to be closed, and the first power switch and the fourth power switch are controlled to be opened, so that the electric energy corresponding to the load charges the inductor;

[0138] controlling the second power switch to be opened, controlling the first power switch to be closed, controlling the third power switch to remain closed, and controlling the fourth power switch to remain opened, so that the electric energy corresponding to the load and the inductor together supply power to the battery;

[0139] In the step-down phase, the first power switch and the third power switch are controlled to be closed, and the second power switch and the fourth power switch are controlled to be opened, so that the electric energy corresponding to the load is supplied to the battery through the inductor;

[0140] The third power switch is controlled to be opened, and the fourth power switch is controlled to be closed, the first power switch is controlled to remain closed, and the second power switch is controlled to remain opened, so that the inductor supplies power to the battery.

[0141] When battery charging is performed, that is, when energy recovery is performed, the equivalent circuit diagram corresponding to the hybrid control circuit is shown in Figure 4. In this diagram, battery connection terminals 1 and 2 are output terminals, and load connection terminals 5 and 6 are input terminals.

[0142] As shown in FIG4 , after the first and third terminals are connected, the battery connected to battery connection terminals 1 and 2, and the load connected to load connection terminals 5 and 6, are connected to the circuit, and the transfer switch is disconnected (not shown in FIG4 ). In this case, the operating mode of the circuit shown in FIG4 is DC-DC mode.

[0143] In the boost phase, the third power switch 105 and the second power switch 104 can be controlled to be closed, and the fourth power switch 106 and the first power switch 103 can be controlled to be disconnected. In this way, the inductor 101 can be charged, and then the second power switch 104 can be disconnected, the first power switch 103 can be closed, the third power switch 105 can be controlled to remain closed, and the fourth power switch 106 can be controlled to remain closed. In this way, the load connected to the load connection terminal 5 and the load connection terminal 6 and the inductor 101 can jointly supply power to the battery connected to the battery connection terminal 1 and the battery connection terminal 2, thereby achieving the purpose of boosting.

[0144] During the voltage reduction phase, the third power switch 105 and the first power switch 103 can be controlled to be closed, while the second power switch 104 and the fourth power switch 106 can be controlled to be opened. The electric energy corresponding to the load connected to the load connection terminals 5 and 6 is supplied to the battery connected to the battery connection terminals 1 and 2 through the inductor 101. Furthermore, the third power switch 105 can be controlled to be opened, the fourth power switch 106 can be controlled to be closed, the first power switch 103 can be controlled to remain closed, and the second power switch 104 can be controlled to remain opened. In this way, the battery can be supplied with power (freewheeling) through the inductor 101, thereby achieving voltage reduction.

[0145] In one embodiment, only the step-down phase of the DC-DC mode may be used to charge the recovered energy into the battery.

[0146] It can be seen that in this embodiment, if the load end is a load capable of realizing energy recovery, the recovered energy can be charged into the battery, thereby realizing energy recovery.

[0147] As an implementation of an embodiment of the present application, the battery connection terminal is further connected to a photovoltaic cell, and the grid connection terminal is connected to a mains power grid. The information to be processed also includes photovoltaic power generation information, wherein the photovoltaic power generation information is information indicating whether the photovoltaic cell is generating electricity.

[0148] When the energy recovery information indicates that energy recovery is not required and the photovoltaic power generation information indicates that the photovoltaic cell generates electricity, that is, in the case corresponding to the above step S305 , the information to be processed indicates that alternating current is involved in the circuit.

[0149] The above-mentioned steps of controlling the switching switch to a state where the control operation is not achieved through the inductor, and controlling the turning off and on of each power switch based on the AC timing to achieve mains power supply, mains charging or grid connection may include:

[0150] Based on the AC power timing sequence, control the first power switch and the fourth power switch to be closed, and the second power switch and the third power switch to be opened; or control the second power switch and the third power switch to be closed, and the first power switch and the fourth power switch to be opened;

[0151] The second end and the third end are controlled to be conductive, and the conversion switch is controlled to be closed, so that the electric energy generated by the photovoltaic cell is integrated into the commercial power grid.

[0152] In the case of grid connection, the equivalent circuit diagram corresponding to the above hybrid control circuit is shown in FIG5 , wherein the battery connection terminal 1 and the battery connection terminal 2 are input terminals, and the grid connection terminal 3 and the grid connection terminal 4 are output terminals.

[0153] As shown in FIG5 , after the second and third terminals are connected, the photovoltaic cells connected to the battery connection terminals 1 and 2, and the mains power grid connected to the grid connection terminals 3 and 4 are connected to the circuit, and the transfer switch is closed (not shown in FIG5 ).

[0154] When photovoltaic cells (photovoltaic panels) generate electricity and the load has no power demand, the electricity corresponding to the photovoltaic power generation can be integrated into the power grid to obtain power generation revenue.

[0155] Based on the AC timing, during the positive half-cycle of the utility grid input, the electricity generated by the photovoltaic cell is connected to the utility grid by controlling the first power switch 103 and the fourth power switch 106 to be closed, and the second power switch 104 and the third power switch 105 to be opened. The current corresponding to the photovoltaic cell can then flow from battery connection terminal 1 through the first power switch 103 to the grid connection terminal, and then return to the battery connection terminal 2 through the fourth power switch 106.

[0156] When the mains power grid input is in the negative half cycle, the electric energy generated by the photovoltaic cell is connected to the mains power grid by controlling the second power switch 104 and the third power switch 105 to be closed, and controlling the first power switch 103 and the fourth power switch 106 to be opened. The current corresponding to the photovoltaic cell flows from the battery connection terminal 1 through the third power switch 105 to the grid connection terminal, and then returns to the battery connection terminal 2 through the second power switch 104.

[0157] By controlling the first power switch 103 and the fourth power switch 106 as well as the second power switch 104 and the third power switch 105 to be alternately turned on through the above control, the frequency corresponding to the photovoltaic cell matches the grid frequency, and the power quality meets the AC power requirements of the mains power grid, thereby achieving grid connection.

[0158] As an implementation method of an embodiment of the present application, the information to be processed also includes battery power information and electricity price information. The battery power information is information indicating whether the battery power is sufficient, and the electricity price information is information indicating whether the current electricity price is lower than the preset electricity price threshold. The preset electricity price threshold can be a user-preset electricity price threshold or a electricity price threshold determined based on historical electricity price information, both of which are reasonable.

[0159] When the photovoltaic power generation information indicates that the photovoltaic cell is not generating electricity, the battery power information indicates that the battery power is insufficient, and the electricity price information indicates that the current electricity price is lower than the preset electricity price threshold, that is, in the case of the above-mentioned step S309, the information to be processed indicates that alternating current is involved in the circuit.

[0160] The above-mentioned steps of controlling the switching switch to a state where the control operation is not achieved through the inductor, and controlling the turning off and on of each power switch based on the AC timing to achieve mains power supply, mains charging or grid connection may include:

[0161] Based on the AC power timing sequence, control the first power switch and the fourth power switch to be closed, and the second power switch and the third power switch to be opened; or control the second power switch and the third power switch to be closed, and the first power switch and the fourth power switch to be opened;

[0162] The second end and the third end are controlled to be conductive, and the conversion switch is controlled to be closed, so that the commercial power grid charges the battery.

[0163] In the case of AC charging, the equivalent circuit diagram corresponding to the above hybrid control circuit is shown in FIG6 , wherein the battery connection terminal 1 and the battery connection terminal 2 are output terminals, and the grid connection terminal 3 and the grid connection terminal 4 are input terminals.

[0164] As shown in Figure 6 , after the second and third terminals are connected, the battery connected to battery connection terminals 1 and 2, and the mains power grid connected to grid connection terminals 3 and 4, are connected to the circuit, and the transfer switch is closed (not shown in Figure 6 ). In this case, the operating mode of the circuit shown in Figure 6 is the controlled rectification mode.

[0165] When electricity consumption is low or electricity prices are relatively cheap, the battery can be charged by the mains power grid. Then, when electricity consumption is high or photovoltaic output is not ideal, the battery can be used to power the load, which can reduce the user's electricity costs.

[0166] Based on the AC power timing, when the mains input is in the positive half-cycle, the first power switch 103 and the fourth power switch 106 are both closed, and the second power switch 104 and the third power switch 105 are both opened. Current can then flow from the grid connection terminal 3 through the first power switch 103 to the battery connection terminal, and then return to the grid connection terminal 4 through the fourth power switch 106.

[0167] When the mains power grid input is in a negative half cycle, by controlling the second power switch 104 and the third power switch 105 to be closed, and controlling the first power switch 103 and the fourth power switch 106 to be open, the current can flow from the grid connection terminal 4 through the third power switch 105 to the load connection terminal, and then return to the grid connection terminal 3 through the second power switch 104.

[0168] By controlling the first power switch 103 and the fourth power switch 106 as well as the second power switch 104 and the third power switch 105 to be turned on alternately, the electric energy of the mains grid is rectified and charged into the battery, so that the mains grid charges the battery.

[0169] As an implementation manner of an embodiment of the present application, the information to be processed also includes power information, wherein the power information is information indicating whether the output power of the photovoltaic cell is not less than the power corresponding to the load.

[0170] When the load power information indicates that the load has a power demand, and the power information indicates that the output power of the photovoltaic cell is not less than the power corresponding to the load, that is, in the case of step S311 above, the information to be processed indicates that only direct current is involved in the circuit;

[0171] The step of controlling the switching switch to a state where the control operation is implemented through the inductor, controlling the timing of the power switches to be turned off and on based on the inductor charge and discharge cycle to charge and discharge the inductor and implement battery power supply or battery charging, further includes:

[0172] The first end and the third end are controlled to be conductive, the conversion switch is controlled to be disconnected, and based on the step-up and step-down stages, the timing of the power switches being turned off and on based on the inductor charge and discharge cycle is controlled so that the electric energy output by the photovoltaic cell can power the load.

[0173] The step of controlling the timing of the power switches to be turned off and on based on the inductor charge and discharge cycle in the buck-boost stage so that the power energy output by the photovoltaic cell supplies power to the load may include:

[0174] In the boost phase, the first power switch and the fourth power switch are controlled to be closed, and the second power switch and the third power switch are controlled to be opened, so that the electric energy output by the photovoltaic cell charges the inductor;

[0175] controlling the fourth power switch to be opened, controlling the third power switch to be closed, controlling the first power switch to remain closed, and controlling the second power switch to remain open, so that the power output by the photovoltaic cell and the inductor together supply power to the load;

[0176] In the step-down phase, the first power switch and the third power switch are controlled to be closed, and the second power switch and the fourth power switch are controlled to be opened, so that the electric energy output by the photovoltaic cell is used to supply power to the load through the inductor;

[0177] The first power switch is controlled to be opened, the second power switch is controlled to be closed, the third power switch is controlled to remain closed, and the fourth power switch is controlled to remain opened, so that the inductor supplies power to the load.

[0178] In the case of photovoltaic power supply, the equivalent circuit diagram of the hybrid control circuit is shown in FIG7 , wherein the battery connection terminal 1 and the battery connection terminal 2 are input terminals, and the load connection terminal 5 and the load connection terminal 6 are output terminals.

[0179] As shown in FIG7 , after the first and third terminals are connected, the photovoltaic cell connected to battery connection terminals 1 and 2, and the load connected to load connection terminals 5 and 6, are connected to the circuit, and the transfer switch is disconnected (not shown in FIG7 ). In this case, the operating mode of the circuit shown in FIG7 is DC-DC mode.

[0180] During the boost phase, the first power switch 103 and the fourth power switch 106 can be controlled to be closed, and the second power switch 104 and the third power switch 105 can be controlled to be disconnected. This allows the inductor 101 to be charged, and then the fourth power switch 106 is disconnected, the third power switch 105 is closed, the first power switch 103 is controlled to remain closed, and the second power switch 104 is controlled to remain closed. This allows the photovoltaic cell and the inductor 101 connected to the battery connection terminals 1 and 2 to jointly supply power to the load connected to the load connection terminals 5 and 6, thereby achieving the purpose of boosting the voltage.

[0181] During the voltage reduction phase, the first power switch 103 and the third power switch 105 can be controlled to be closed, while the second power switch 104 and the fourth power switch 106 can be controlled to be opened. The voltage provided by the photovoltaic cells connected to the battery connection terminals 1 and 2 is supplied to the load connected to the load connection terminals 5 and 6 via the inductor 101. Furthermore, the first power switch 103 can be controlled to be opened, the second power switch 104 can be controlled to be closed, the third power switch 105 can be controlled to remain closed, and the fourth power switch 106 can be controlled to remain open. In this way, the load can be supplied with power (freewheeling) via the inductor 101, thereby achieving voltage reduction.

[0182] As an implementation method of an embodiment of the present application, the information to be processed further includes battery power information and charging price information, wherein the charging price information is information indicating whether the current electricity price is consistent with the preset charging price;

[0183] When the power information indicates that the output power of the photovoltaic cell is less than the power corresponding to the load, the battery power information indicates that the battery power is sufficient, and the charging price information indicates that the current electricity price is higher than the preset charging price, that is, in the case of step S315 above, the information to be processed indicates that only direct current is involved in the circuit;

[0184] The step of controlling the switching switch to a state where the control operation is implemented through the inductor, controlling the timing of the power switches to be turned off and on based on the inductor charge and discharge cycle to charge and discharge the inductor and implement battery power supply or battery charging may include:

[0185] The first end and the third end are controlled to be conductive, the conversion switch is controlled to be disconnected, and based on the step-up and step-down stages, the timing of the power switches being turned off and on based on the inductor charge and discharge cycle is controlled so that the electric energy output by the battery can power the load.

[0186] The step of controlling the sequential turning off and on of each power switch based on the inductor charge and discharge cycle in the step-up and step-down phase so that the electric energy output by the battery supplies power to the load may include:

[0187] In the boost phase, the first power switch and the fourth power switch are controlled to be closed, and the second power switch and the third power switch are controlled to be opened, so that the electric energy output by the battery charges the inductor;

[0188] controlling the fourth power switch to be opened, controlling the third power switch to be closed, controlling the first power switch to remain closed, and controlling the second power switch to remain open, so that the electric energy output by the battery and the inductor together supply power to the load;

[0189] In the step-down phase, the first power switch and the third power switch are controlled to be closed, and the second power switch and the fourth power switch are controlled to be opened, so that the electric energy output by the battery is used to supply power to the load through the inductor;

[0190] The first power switch is controlled to be opened, the second power switch is controlled to be closed, the third power switch is controlled to remain closed, and the fourth power switch is controlled to remain opened, so that the inductor supplies power to the load.

[0191] When powered by a battery, battery terminals 1 and 2 serve as input terminals, while load terminals 5 and 6 serve as output terminals. When powered by a battery, the equivalent circuit diagram is similar to Figure 7 (except that the photovoltaic cells connected to battery terminals 1 and 2 are replaced with batteries). When the first and third terminals are conductive, the batteries connected to battery terminals 1 and 2, and the loads connected to load terminals 5 and 6, are connected to the circuit, and the transfer switch is disconnected. In this case, the circuit operates in DC-DC mode.

[0192] During the voltage boost phase, the first power switch 103 and the fourth power switch 106 can be controlled to be closed, and the second power switch 104 and the third power switch 105 can be controlled to be opened. This allows the inductor 101 to be charged, and then the fourth power switch 106 is opened, the third power switch 105 is closed, the first power switch 103 is controlled to remain closed, and the second power switch 104 is controlled to remain closed. This allows the battery connected to the battery connection terminal 1 and the battery connection terminal 2 and the inductor 101 to jointly supply power to the load connected to the load connection terminal 5 and the load connection terminal 6, thereby achieving the purpose of voltage boost.

[0193] During the voltage reduction phase, the first power switch 103 and the third power switch 105 can be controlled to be closed, while the second power switch 104 and the fourth power switch 106 can be controlled to be opened. The voltage provided by the battery connected to the battery connection terminals 1 and 2 is supplied to the load connected to the load connection terminals 5 and 6 via the inductor 101. Furthermore, the first power switch 103 can be controlled to be opened, the second power switch 104 can be controlled to be closed, the third power switch 105 can be controlled to remain closed, and the fourth power switch 106 can be controlled to remain opened. In this way, the load can be supplied with power (freewheeling) via the inductor 101, thereby achieving voltage reduction.

[0194] As an implementation method of an embodiment of the present application, when the battery power information indicates that the battery power is insufficient, or when the charging price information indicates that the current electricity price is not higher than the preset charging price (that is, in the case of the above-mentioned step S314), the information to be processed indicates that alternating current is involved in the circuit.

[0195] The above-mentioned steps of controlling the switching switch to a state where the control operation is not achieved through the inductor, and controlling the turning off and on of each power switch based on the AC timing to achieve mains power supply, mains charging or grid connection may include:

[0196] Based on the AC power timing sequence, control the first power switch and the fourth power switch to be closed, and the second power switch and the third power switch to be opened; or control the second power switch and the third power switch to be closed, and the first power switch and the fourth power switch to be opened;

[0197] The second end and the third end are controlled to be conductive, and the conversion switch is controlled to be closed, so that the electric energy output by the commercial power grid supplies power to the load.

[0198] In the case of grid power supply, the equivalent circuit diagram corresponding to the above hybrid control circuit is shown in FIG8 , wherein the grid connection terminal 3 and the grid connection terminal 4 are input terminals, and the load connection terminal 5 and the load connection terminal 6 are output terminals.

[0199] As shown in FIG8 , after the second and third terminals are connected, the mains power grid connected to the grid connection terminals 3 and 4, and the load connected to the load connection terminals 5 and 6 are connected to the circuit, and the transfer switch is closed (not shown in FIG8 ). In this case, the working mode of the circuit shown in FIG8 is the controlled rectification mode.

[0200] Based on the AC power timing, when the mains input is in the positive half-cycle, the first power switch 103 and the fourth power switch 106 are both closed, and the second power switch 104 and the third power switch 105 are both opened. Current can then flow from the grid connection terminal 3 through the first power switch 103 to the load connection terminal, and then return to the grid connection terminal 4 through the fourth power switch 106.

[0201] When the mains power grid input is in a negative half cycle, by controlling the second power switch 104 and the third power switch 105 to be closed, and controlling the first power switch 103 and the fourth power switch 106 to be open, the current can flow from the grid connection terminal 4 through the third power switch 105 to the load connection terminal, and then return to the grid connection terminal 3 through the second power switch 104.

[0202] Through the above control, the first power switch 103 and the fourth power switch 106 as well as the second power switch 104 and the third power switch 105 are alternately turned on, so that the load is supplied with power through the commercial power grid.

[0203] As an implementation method of an embodiment of the present application, the batteries connected to the battery connection terminal 1 and the battery connection terminal 2 are not limited to photovoltaic cells and storage batteries, but can also be connected to other batteries with the same properties. The grid connection terminal 3 and the grid connection terminal 4 are also not limited to the mains power grid, and can be connected to other grids with the same properties according to actual usage.

[0204] As an implementation of an embodiment of the present application, the battery may include multiple batteries, which can be specifically set according to actual usage. For example, the battery can be set to multiple batteries of different types, which is reasonable.

[0205] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A hybrid control circuit, comprising: Battery connection terminal, grid connection terminal, load connection terminal, inductor, switch and power switch; The inductor and the switch are arranged between the battery connection terminal and the load connection terminal, and between the grid connection terminal and the load connection terminal; The power switch is respectively arranged between the battery connection terminal and the inductor, between the battery connection terminal and the grid connection terminal, and between the switch and the load connection terminal; When the information to be processed indicates that the circuit involves alternating current, the switching switch is switched to a state where control is not achieved through the inductor, and each of the power switches is controlled to be turned off and on based on the alternating current timing, so as to achieve mains power supply, mains charging or grid connection; When the information to be processed indicates that only direct current is involved in the circuit, the switching switch is switched to a state where control is achieved through the inductor; the inductor is charged and discharged by sequentially shutting down and closing each of the power switches based on the charge and discharge cycle of the inductor, so as to achieve battery power supply or battery charging.

2. The hybrid control circuit according to claim 1, wherein: The switch comprises a first end, a second end and a third end; The first end is connected to one end of the inductor; the second end is connected to one end of the grid connection end, the other end of the grid connection end is connected to the other end of the inductor, and the third end is connected to the load connection end through the power switch.

3. The hybrid control circuit according to claim 2, further comprising a switching switch; The power switch comprises: A first power switch, a second power switch, a third power switch, and a fourth power switch; Two ends of the battery connection end are respectively connected to one end of the first power switch and one end of the second power switch, and two ends of the load connection end are respectively connected to one end of the third power switch and one end of the fourth power switch; the conversion switch is connected in parallel with the first power switch, the inductor, the switching switch and the third power switch; The third end is connected to the other end of the third power switch and the other end of the fourth power switch; one end of the second power switch is connected to one end of the fourth power switch; One end of the grid connection end is connected to the other end of the first power switch and the other end of the second power switch, and the other end of the first power switch and the second power switch The other end of the switch is connected to the inductor.

4. A control method, applied to the hybrid control circuit according to any one of claims 1 to 3, comprising: Get the information to be processed; When the information to be processed indicates that the circuit involves alternating current, control the switch to a state where the control operation is not implemented through inductance, and control the turning off and on of each power switch based on the alternating current timing to implement AC power supply, AC charging or grid connection; When the information to be processed indicates that only direct current is involved in the circuit, the switching switch is controlled to a state where the control operation is implemented through the inductor, and the timing of the power switches being turned off and closed based on the inductor charge and discharge cycle is controlled to enable the inductor to charge and discharge, and realize battery power supply or battery charging.

5. The control method according to claim 4, wherein: The battery connection terminal is connected to a storage battery, and the load connection terminal is connected to a load; the information to be processed includes load power information and energy recovery information, wherein the load power information is information indicating whether the load has a power demand, and the energy recovery information is information indicating whether energy needs to be recovered; When the load power information indicates that the load has no power demand, and the energy recovery information indicates that energy recovery is required, the information to be processed indicates that only direct current is involved in the circuit; The control of the switching switch to a state where the control operation is realized through the inductor, and the control of the timing of each power switch being turned off and on based on the inductor charge and discharge cycle, so that the inductor is charged and discharged, and battery power supply or battery charging is realized, include: The first terminal and the third terminal are controlled to be turned on, the conversion switch is controlled to be turned off, and based on the step-up and step-down phase, the timing turning off and closing of each power switch based on the inductor charging and discharging cycle is controlled so that the electric energy corresponding to the load is stored in the battery.

6. The control method according to claim 5, wherein: The battery connection end is also connected to a photovoltaic cell, and the grid connection end is connected to a mains grid; the information to be processed also includes photovoltaic power generation information, wherein the photovoltaic power generation information is information indicating whether the photovoltaic cell generates electricity; In the case where the energy recovery information indicates that energy recovery is not required, and the photovoltaic power generation information indicates that the photovoltaic cell generates electricity, the information to be processed indicates that alternating current is involved in the circuit; The control switches the switch to a state where the control operation is not performed through the inductor, and controls each power The switch is based on the closing and closing of the AC timing to achieve AC power supply, AC charging or grid connection, including: Based on the alternating current timing sequence, the first power switch and the fourth power switch are controlled to be closed, and the second power switch and the third power switch are controlled to be opened; or the second power switch and the third power switch are controlled to be closed, and the first power switch and the fourth power switch are controlled to be opened; The second end and the third end are controlled to be conductive, and the conversion switch is controlled to be closed, so that the electric energy generated by the photovoltaic cell is integrated into the commercial power grid.

7. The control method according to claim 6, wherein: The information to be processed also includes battery power information and electricity price information, wherein the battery power information is information indicating whether the battery power is sufficient, and the electricity price information is information indicating whether the current electricity price is lower than the preset electricity price threshold; When the photovoltaic power generation information indicates that the photovoltaic cell does not generate electricity, the battery power information indicates that the battery power is insufficient, and the electricity price information indicates that the current electricity price is lower than a preset electricity price threshold, the information to be processed indicates that alternating current is involved in the circuit; The control switching switch is set to a state where the control operation is not realized by the inductor, and each power switch is controlled to be turned off and closed based on the alternating current timing to realize mains power supply, mains charging or grid connection, and also includes: Based on the alternating current timing sequence, the first power switch and the fourth power switch are controlled to be closed, and the second power switch and the third power switch are controlled to be opened; or the second power switch and the third power switch are controlled to be closed, and the first power switch and the fourth power switch are controlled to be opened; The second end and the third end are controlled to be conductive, and the conversion switch is controlled to be closed, so that the commercial power grid charges the storage battery.

8. The control method according to any one of claims 5 to 7, wherein: The information to be processed also includes power information, wherein the power information is information indicating whether the output power of the photovoltaic cell is not less than the power corresponding to the load; When the load power information indicates that the load has a power demand, and the power information indicates that the output power of the photovoltaic cell is not less than the power corresponding to the load, the information to be processed indicates that only direct current is involved in the circuit; The switching switch is controlled to a state where the control operation is realized through the inductor, and the timing of each power switch is controlled to be turned off and on based on the inductor charge and discharge cycle, so that the inductor The device can sense the charge and discharge, and realize battery power supply or battery charging, and also includes: The first end and the third end are controlled to be turned on, the conversion switch is controlled to be turned off, and based on the step-up and step-down phase, the timing turning off and closing of each power switch based on the inductor charge and discharge cycle is controlled so that the electric energy output by the photovoltaic cell can power the load.

9. The control method according to claim 8, wherein: The step of controlling the timing of each power switch to be turned off and on based on the inductor charge and discharge cycle based on the step-up and step-down phase, so that the power output by the photovoltaic cell can supply power to the load, includes: In the boost stage, the first power switch and the fourth power switch are controlled to be closed, and the second power switch and the third power switch are controlled to be opened, so that the electric energy output by the photovoltaic cell charges the inductor; Control the fourth power switch to be opened, control the third power switch to be closed, control the first power switch to remain closed, and control the second power switch to remain opened, so that the electric energy output by the photovoltaic cell and the inductor together supply power to the load; In the step-down phase, the first power switch and the third power switch are controlled to be closed, and the second power switch and the fourth power switch are controlled to be opened, so that the electric energy output by the photovoltaic cell can supply power to the load through the inductor; The first power switch is controlled to be opened, the second power switch is controlled to be closed, the third power switch is controlled to remain closed, and the fourth power switch is controlled to remain opened, so that the inductor supplies power to the load.

10. The control method according to claim 8, wherein: The information to be processed also includes battery power information and charging electricity price information, wherein the charging electricity price information is information indicating whether the current electricity price is consistent with the preset charging electricity price; When the power information indicates that the output power of the photovoltaic cell is less than the power corresponding to the load, the battery power information indicates that the battery power is sufficient, and the charging price information indicates that the current electricity price is higher than the preset charging price, the information to be processed indicates that only direct current is involved in the circuit; The control of the switching switch to a state where the control operation is realized through the inductor, and the control of the timing of each power switch being turned off and on based on the inductor charge and discharge cycle, so that the inductor is charged and discharged, and battery power supply or battery charging is realized, include: Control the first end and the third end to be turned on, control the conversion switch to be turned off, and control the timing of each power switch to be turned off based on the inductor charging and discharging cycle based on the step-up and step-down phase; Closed to enable the electric energy output by the battery to power the load.

11. The control method according to claim 10, wherein: In the case where the battery power information indicates that the battery power is insufficient, or in the case where the charging electricity price information indicates that the current electricity price is not higher than the preset charging electricity price, the to-be-processed information indicates that the circuit involves alternating current; The step of controlling the switching switch to a state where the control operation is not realized by the inductor, and controlling the shut-off and closing of each power switch based on the alternating current timing to realize mains power supply, mains power charging or grid connection includes: Based on the alternating current timing sequence, control the first power switch and the fourth power switch to be closed, and the second power switch and the third power switch to be opened; or control the second power switch and the third power switch to be closed, and the first power switch and the fourth power switch to be opened; The second end and the third end are controlled to be conductive, and the conversion switch is controlled to be closed, so that the electric energy output by the commercial power grid supplies power to the load.

Images