Battery control system, method and device

Abstract

The present invention relates to a power supply control system, method and device. The power supply control system comprises a flyback power supply circuit, a first end of which is connected to a power grid, and a second end of which is connected to a load device; an auxiliary power supply circuit, a first end of which is connected to a photovoltaic component, a second end of which is connected to a backup battery, and a third end of which is connected to the load device; and a control circuit, which is respectively connected to the flyback power supply circuit and the auxiliary power supply circuit for communication.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the technical field of power supply control, and more specifically, to a battery control system, method, and device. Background Art

[0002] With the rapid development of power supply technology, power supplies, as a more reliable energy source, require greater stability. Currently, to achieve more stable AC power output to load devices, existing technologies employ flyback power supply circuits. By sampling the load device's current, the flyback power supply circuit's conversion efficiency is controlled. However, powering the load device solely from the grid results in high energy consumption. Summary of the Invention

[0003] One purpose of the embodiments of the present disclosure is to provide a new technical solution for battery control.

[0004] According to a first aspect of the present invention, there is provided a battery control system, the method comprising:

[0005] A flyback power supply circuit, wherein a first end of the flyback power supply circuit is connected to the power grid, and a second end of the flyback power supply circuit is connected to a load device;

[0006] an auxiliary power supply circuit, wherein a first end of the auxiliary power supply circuit is connected to the photovoltaic module, a second end of the auxiliary power supply circuit is connected to the backup battery, and a third end of the auxiliary power supply circuit is connected to the load device;

[0007] a control circuit, the control circuit being communicatively connected to the flyback power supply circuit and the auxiliary power supply circuit respectively;

[0008] In which, the flyback power supply circuit and the auxiliary power supply circuit reuse some rectifier devices. When the first direct current output by the photovoltaic module is within a set first voltage range, the control circuit controls the auxiliary power supply circuit to convert the first direct current into a first alternating current, and outputs the first alternating current through the third end of the auxiliary power supply circuit. When the first direct current output by the photovoltaic module is within a set second voltage range, the control circuit controls the auxiliary power supply circuit to convert the first direct current into a second direct current, and outputs the second direct current through the second end of the auxiliary power supply circuit.

[0009] Optionally, the flyback power supply circuit includes a first primary conversion circuit, a transformer, and a secondary conversion circuit;

[0010] The first end of the first primary conversion circuit serves as the first end of the flyback power supply, the second end of the first primary conversion circuit is connected to the first primary coil of the transformer, the secondary coil of the transformer is connected to the first end of the secondary conversion circuit, the second end of the secondary conversion circuit serves as the second end of the flyback power supply circuit, and the first primary conversion circuit and the secondary conversion circuit are controlled by the control circuit;

[0011] Wherein, the flyback power supply circuit and the auxiliary power supply circuit reuse some rectifier devices as the secondary conversion circuit.

[0012] Optionally, the auxiliary power supply circuit further includes a second primary conversion circuit and a voltage transformation circuit;

[0013] The connection point between the first end of the second primary conversion circuit and the first end of the transformer circuit serves as the first end of the auxiliary power supply circuit, the second end of the second primary conversion circuit is connected to the second primary coil of the transformer, the second end of the transformer circuit serves as the second end of the auxiliary power supply, and the second primary conversion circuit is controlled by the control circuit.

[0014] Optionally, the auxiliary power supply circuit further includes a first switch and a second switch, wherein the first switch is arranged between the photovoltaic component and the second primary conversion circuit, and the second switch is arranged between the photovoltaic component and the transformer circuit, and the first switch and the second switch are controlled by the control circuit.

[0015] Optionally, the power supply control system further includes an isolation circuit and a current sampling circuit, wherein the first power supply terminal of the control circuit is connected to the fourth terminal of the auxiliary power supply circuit, the second power supply terminal of the control circuit is connected to the third terminal of the secondary conversion circuit, the sampling terminal of the control circuit is connected to the first terminal of the isolation circuit, the second terminal of the isolation circuit is connected to the first terminal of the current sampling circuit, and the second terminal of the current sampling circuit is connected to the second terminal of the secondary conversion circuit;

[0016] The control circuit is configured to receive a current signal representing the second direct current input to the load device through the current sampling circuit, and control the conversion efficiency of the flyback power supply circuit and the auxiliary power supply circuit.

[0017] According to a second aspect of the present invention, a power supply control method is further provided. The power supply control method is applied to the power supply control system according to the first aspect. The execution subject of the power supply control method is a control circuit. The control method includes:

[0018] In response to a power supply request from the load device, controlling the flyback power supply circuit to convert the third direct current output from the power grid into the first alternating current;

[0019] detecting a voltage value of a first direct current output by the photovoltaic assembly;

[0020] When the first direct current output by the photovoltaic assembly is within a set second voltage range, controlling the flyback power supply circuit to convert the first direct current into a first alternating current and output the first alternating current through the second end of the flyback power supply circuit, and controlling the auxiliary power supply circuit to convert the first direct current into a second direct current and output the second direct current through the second end of the auxiliary power supply circuit;

[0021] When the first direct current output by the photovoltaic component is within a set first voltage range, the flyback power supply circuit is controlled to convert the third direct current output by the power grid into a first alternating current, and the auxiliary power supply circuit is controlled to convert the first direct current into a first alternating current, and the first alternating current is output through the second end of the flyback power supply circuit and the third end of the auxiliary power supply circuit.

[0022] Optionally, the auxiliary power supply circuit further includes a first switch and a second switch, wherein the first switch is arranged between the photovoltaic assembly and the second primary conversion circuit, and the second switch is arranged between the photovoltaic assembly and the voltage transformation circuit, and the first switch and the second switch are controlled by the control circuit;

[0023] The controlling the auxiliary power supply circuit to convert the first direct current into a second direct current includes:

[0024] controlling the second switch to be opened and the first switch to be closed, and controlling the auxiliary power supply circuit to convert the first direct current into a second direct current;

[0025] The controlling the auxiliary power supply circuit to convert the first direct current into a first alternating current includes:

[0026] The second switch is controlled to be closed and the first switch is controlled to be open, and the auxiliary power supply circuit is controlled to convert the first direct current into a first alternating current.

[0027] Optionally, the power supply control system further includes an isolation circuit and a current sampling circuit;

[0028] Before controlling the flyback power supply circuit to convert the third direct current outputted from the power grid into a first alternating current, and controlling the auxiliary power supply circuit to convert the first direct current into a first alternating current, and outputting the first alternating current through the second end of the flyback power supply circuit and the third end of the auxiliary power supply circuit, the method further includes:

[0029] receiving, by the current sampling device, a current signal representing a first alternating current input to the load device;

[0030] When the current signal indicates that the first alternating current is lower than a first set threshold, determining the remaining power of the backup battery;

[0031] When the remaining power of the backup battery exceeds a first set power, controlling the first switch and the second switch to close, and controlling the auxiliary power supply circuit to convert the fourth direct current output by the backup battery into the first alternating current;

[0032] The controlling the flyback power supply circuit to convert the third direct current outputted by the power grid into a first alternating current, and controlling the auxiliary power supply circuit to convert the first direct current into a first alternating current, and outputting the first alternating current through the second end of the flyback power supply circuit and the third end of the auxiliary power supply circuit, comprises:

[0033] When the current signal indicates that the first alternating current is not lower than a first set threshold, the flyback power supply circuit is controlled to convert the third direct current output by the power grid into the first alternating current, and the auxiliary power supply circuit is controlled to convert the first direct current into the first alternating current, and the first alternating current is output through the second end of the flyback power supply circuit and the third end of the auxiliary power supply circuit.

[0034] Optionally, the method further includes:

[0035] When the remaining power of the backup battery does not exceed the first set power, the conversion efficiency of the flyback power supply circuit is adjusted.

[0036] Optionally, the method further includes:

[0037] When the current signal indicates that the first alternating current is lower than a second set threshold, determining the remaining power of the backup battery;

[0038] When the remaining power of the backup battery is lower than a second set power, the first switch and the second switch are controlled to be disconnected, and the transformer circuit of the auxiliary power supply circuit is controlled to convert the fourth direct current output by the backup battery into a fifth direct current, so as to enter a shutdown sequence;

[0039] When the remaining power of the backup battery is higher than the second set power, the first switch and the second switch are controlled to be closed, and the auxiliary power supply circuit is controlled to convert the fourth direct current output by the backup battery into the sixth direct current to enter the shutdown sequence of the load device.

[0040] According to a third aspect of the present invention, there is further provided a control circuit, comprising:

[0041] a response module, configured to respond to a power supply request from the load device and control the flyback power supply circuit to convert the third direct current outputted by the power grid into the first alternating current;

[0042] a detection module, configured to detect a voltage value of the first direct current output by the photovoltaic assembly;

[0043] a control module, configured to, when the first direct current output by the photovoltaic assembly is within a set second voltage range, control the flyback power supply circuit to convert the first direct current into a first alternating current and output the first alternating current through the second end of the flyback power supply circuit, and control the auxiliary power supply circuit to convert the first direct current into a second direct current and output the second direct current through the second end of the auxiliary power supply circuit;

[0044] A charging module is used to control the flyback power supply circuit to convert the third direct current into a first alternating current when the first direct current output by the photovoltaic component is within a set first voltage range, and to control the auxiliary power supply circuit to convert the first direct current into a first alternating current, and output the first alternating current through the second end of the flyback power supply circuit and the third end of the auxiliary power supply circuit.

[0045] According to a fourth aspect of the present invention, there is also provided an artificial intelligence-based power resource processing device, comprising a memory and a processor, wherein the memory is used to store a computer program; the processor is used to execute the computer program to implement the method according to the first aspect of the present invention.

[0046] According to a fifth aspect of the present invention, a computer-readable storage medium is further provided, on which a computer program is stored. When the computer program is executed by a processor, the method according to the first aspect of the present invention is implemented.

[0047] One beneficial effect of the embodiment of the present disclosure is that when the first direct current output by the photovoltaic component is within a set first voltage range, the control circuit can control the flyback power supply circuit to power the load device; when the first direct current output by the photovoltaic component is within a set second voltage range, the control circuit can control the auxiliary power supply circuit and the flyback power supply circuit to power the load device, thereby powering the load device through the photovoltaic component, which can effectively reduce the energy consumption of the power control system.

[0048] Other features and advantages of the embodiments of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments of the disclosure.

[0050] Figure 1 is a schematic diagram of the structure of a power supply control system to which one embodiment of the present invention can be applied;

[0051] Figure 2 is a flow chart of a power supply control method according to an embodiment;

[0052] Figure 3 is a block diagram of a power control device according to an embodiment;

[0053] Figure 4 FIG. 1 is a schematic diagram of the hardware structure of a power supply control device according to an embodiment. DETAILED DESCRIPTION

[0054] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0055] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0056] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0057] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0058] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0059] <System Example>

[0060] Figure 1 FIG. 1 is a schematic diagram of a structure of a power supply control system according to an embodiment of the present invention. Figure 1 As shown, the system includes a flyback power supply circuit, an auxiliary power supply circuit and a control circuit 30.

[0061] A first terminal of the flyback power supply circuit is connected to the power grid 10 , and a second terminal of the flyback power supply circuit is connected to the load device 50 .

[0062] A first terminal of the auxiliary power circuit is connected to the photovoltaic assembly 20 , a second terminal of the auxiliary power circuit is connected to the backup battery 40 , and a third terminal of the auxiliary power circuit is connected to the load device 50 .

[0063] The control circuit 30 is communicatively connected to the flyback power supply circuit and the auxiliary power supply circuit respectively.

[0064] Among them, the flyback power supply circuit and the auxiliary power supply circuit reuse some rectifier devices. When the first direct current output by the photovoltaic component 20 is within the set first voltage range, the control circuit 30 controls the auxiliary power supply circuit to convert the first direct current into a first alternating current, and outputs the first alternating current through the third end of the auxiliary power supply circuit. When the first direct current output by the photovoltaic component 20 is within the set second voltage range, the control circuit 30 controls the auxiliary power supply circuit to convert the first direct current into a second direct current, and outputs the second direct current through the second end of the auxiliary power supply circuit.

[0065] In this embodiment, the flyback power supply circuit can be a DC-AC conversion circuit, and the auxiliary power supply circuit can be a DC-AC conversion circuit. These two DC-AC conversion circuits can be isolated DC-AC conversion circuits or non-isolated DC-AC conversion circuits, which are not limited here.

[0066] In this embodiment, the control circuit 30 is, for example, a control chip, which has functions such as communication, receiving analog signals, data calculation, and data storage, which are not limited here.

[0067] In some examples, the first direct current and the second direct current may be direct currents of different voltages or currents.

[0068] In this embodiment, the minimum value of the first voltage range can be equal to the maximum value of the second voltage range. The first voltage range and the second voltage range can be set based on factors such as the first DC power output by the photovoltaic module 20 and the operating voltage of the load device 50. The first voltage range and the second voltage range are manually set and are not limited here.

[0069] In some examples, such as Figure 1 As shown, a control switch K0 is provided between the grid 10 and the flyback power supply circuit. The control switch K0 can be controlled by the control circuit 30 to be opened or closed.

[0070] In other words, when the first direct current output by the photovoltaic component 20 is within the set first voltage range, the control circuit 30 can control the flyback power supply circuit to power the load device 50. When the first direct current output by the photovoltaic component 20 is within the set second voltage range, the control circuit 30 can control the auxiliary power supply circuit and the flyback power supply circuit to power the load device 50. By powering the load device 50 through the photovoltaic component 20, the energy consumption of the power control system can be effectively reduced.

[0071] In some embodiments, the flyback power supply circuit includes a first primary conversion circuit 1, a transformer T1, and a secondary conversion circuit 3; the first end of the first primary conversion circuit 1 serves as the first end of the flyback power supply, the second end of the first primary conversion circuit 1 is connected to the first primary coil of the transformer T1, the secondary coil of the transformer T1 is connected to the first end of the secondary conversion circuit 3, the second end of the secondary conversion circuit 3 serves as the second end of the flyback power supply circuit, and the first primary conversion circuit 1 and the secondary conversion circuit 3 are controlled by the control circuit 30; wherein, the flyback power supply circuit and the auxiliary power supply circuit reuse part of the rectifier device as the secondary conversion circuit 3.

[0072] In this embodiment, the first primary conversion circuit 1 may be an existing DC-AC conversion circuit, and the secondary conversion circuit 3 may be an existing AC-AC conversion circuit.

[0073] In other words, by reusing the secondary conversion circuit 3 , the utilization efficiency of the flyback power supply circuit can be improved, and the manufacturing cost of the power control system can be saved.

[0074] In some embodiments, the auxiliary power supply circuit also includes a second primary conversion circuit 2 and a transformer circuit 6; the connection point between the first end of the second primary conversion circuit 2 and the first end of the transformer circuit 6 serves as the first end of the auxiliary power supply circuit, the second end of the second primary conversion circuit 2 is connected to the second primary coil of the transformer T1, the second end of the transformer circuit 6 serves as the second end of the auxiliary power supply, and the second primary conversion circuit 2 is controlled by the control circuit 30.

[0075] In this embodiment, the second primary conversion circuit 2 is an existing DC-AC conversion circuit, and the transformer circuit 6 can be a DC-DC conversion circuit. The DC-DC conversion circuit can be a boost circuit or a buck circuit, which is not limited here.

[0076] In other words, by setting up the second primary conversion circuit 2 and the transformer circuit 6, it is possible to achieve the process of the grid 10 supplying power to the load device 50 by supplementing the power grid 10 through the photovoltaic component 20 or the backup battery 40, so as to improve the stability of the power supply of the power control system.

[0077] In some embodiments, as Figure 1As shown, the auxiliary power supply circuit also includes a first switch K1 and a second switch K2. The first switch K1 is arranged between the photovoltaic component 20 and the second primary conversion circuit 2, and the second switch K2 is arranged between the photovoltaic component 20 and the transformer circuit 6. The first switch K1 and the second switch K2 are controlled by the control circuit 30.

[0078] In this embodiment, when the first switch K1 is closed and the second switch K2 is open, the photovoltaic assembly 20 can supply power to the backup battery 40 or to the control circuit 30 via the voltage conversion circuit 6. When the first switch K1 is open and the second switch K2 is closed, the photovoltaic assembly 20 can supply power to the load device 50 via the auxiliary power circuit. When both the first switch K1 and the second switch K2 are closed, the backup battery 40 can supply power to the load device 50 or to the control circuit 30 via the auxiliary power circuit.

[0079] In other words, by providing the first switch K1 and the second switch K2 , the circuits in the auxiliary power supply circuit can be reused to achieve the functions of discharging the backup battery 40 and discharging the photovoltaic assembly 20 , thereby improving the utilization efficiency of the power control system.

[0080] In some embodiments, the power supply control system further includes an isolation circuit 5 and a current sampling circuit 4, the first power supply end of the control circuit 30 is connected to the fourth end of the auxiliary power supply circuit, the second power supply end of the control circuit 30 is connected to the third end of the secondary conversion circuit 3, the sampling end of the control circuit 30 is connected to the first end of the isolation circuit 5, the second end of the isolation circuit 5 is connected to the first end of the current sampling circuit 4, and the second end of the current sampling circuit 4 is connected to the second end of the secondary conversion circuit 3; wherein, the control circuit 30 is configured to receive a current signal representing the first alternating current input to the load device 50 through the current sampling circuit 4, and control the conversion efficiency of the flyback power supply circuit and the auxiliary power supply circuit.

[0081] In this embodiment, the isolation circuit 5 is, for example, an existing optocoupler, and the current sampling circuit 4 can be connected to the negative electrode of the second terminal of the secondary conversion circuit 3 to collect the current at the second terminal of the secondary conversion circuit 3. The control circuit 30 can output PWM wave signals with different duty cycles based on the collected current to control the conversion efficiency of the first primary conversion circuit 1, the second primary conversion circuit 2, and the secondary conversion circuit 3. Controlling the conversion efficiency of the conversion circuit using PWM wave signals with different duty cycles is a prior art technique and will not be elaborated on in detail here.

[0082] In other words, the flyback switching power supply is formed by providing the isolation circuit 5 , the current sampling circuit 4 and the flyback power supply circuit to output a relatively stable first alternating current to the load device 50 .

[0083] As used in the embodiments of the present disclosure, the memory of the control circuit 30 is used to store a computer program that controls the processor of the circuit 30 to operate according to any embodiment of the artificial intelligence-based power resource processing method. A skilled person can design a computer program based on the solutions of the embodiments of the present disclosure. How this computer program controls the processor's operation is well known in the art and will not be described in detail here.

[0084] <Method Example>

[0085] Figure 2 This is a flow chart of a power control method according to an embodiment. Figure 1 In the control circuit.

[0086] like Figure 2 As shown, the power control method of this embodiment may include the following steps S210 to S240:

[0087] Step S210 , in response to a power supply request from a load device, controlling the flyback power supply circuit to convert the third direct current outputted from the power grid into the first alternating current.

[0088] In this embodiment, the load device may be communicatively connected to the control circuit, so that the load device may feed back a power supply request to the control circuit.

[0089] In this embodiment, the load device is, for example, an electric vehicle, an electric locker, or a household appliance, etc., which is not limited here.

[0090] In some examples, the control circuit can control the first primary conversion circuit and the secondary conversion circuit by outputting PWM waves with different duty cycles, so that the third direct current output from the grid is converted into the first alternating current to be output to the load device.

[0091] Step S220 , detecting the voltage value of the first direct current output by the photovoltaic assembly.

[0092] In this embodiment, the control circuit may set voltage sampling devices at the positive and negative electrodes of the photovoltaic module, so that the control circuit can detect the voltage value of the first direct current output by the photovoltaic module.

[0093] Step S230, when the first direct current output by the photovoltaic module is within a set first voltage range, controlling the flyback power supply circuit to convert the third direct current output by the power grid into a first alternating current, and controlling the auxiliary power supply circuit to convert the first direct current into a first alternating current, and outputting the first alternating current through the second end of the flyback power supply circuit and the third end of the auxiliary power supply circuit.

[0094] Step S240, when the first direct current output by the photovoltaic module is within a set second voltage range, controlling the flyback power supply circuit to convert the first direct current into a first alternating current, and outputting the first alternating current through the second end of the flyback power supply circuit, and controlling the auxiliary power supply circuit to convert the first direct current into a second direct current, and outputting the second direct current through the second end of the auxiliary power supply circuit.

[0095] In some examples, the minimum value of the first voltage range can be equal to the maximum value of the second voltage range. The first voltage range is (voltage value A, voltage value B), and the second voltage range is (voltage value C, voltage value A). Because light intensity gradually increases and then decreases throughout the day, during a first time period, the first DC power output by the photovoltaic assembly is within the first voltage range. During a second time period, the first DC power output by the photovoltaic assembly is within the second voltage range. During a third time period, the first DC power output by the photovoltaic assembly is within the first voltage range. The second time period is between the first and third time periods.

[0096] During the first and third time periods, the control circuit can control the transformer circuit to convert the first DC power output by the photovoltaic component into a second DC power, and output it to the backup battery to charge the backup battery, thereby improving the utilization rate of the first DC power output by the photovoltaic component.

[0097] In the second time period, the control circuit can control the first secondary conversion circuit, the second primary conversion circuit and the secondary conversion circuit to convert the third direct current output by the power grid and the first direct current output by the photovoltaic component into the first alternating current, so that the photovoltaic component can power the load equipment with a relatively stable first direct current.

[0098] In some embodiments, step S230 may include the following step S2301:

[0099] When the first direct current output by the photovoltaic assembly is within a set second voltage range, the second switch is controlled to be open and the first switch is closed, and the auxiliary power supply circuit is controlled to convert the first direct current into the second direct current.

[0100] Step S240 may include the following steps S2401:

[0101] Step S2401: When the first direct current output by the photovoltaic module is within a set first voltage range, the second switch is controlled to be closed and the first switch is opened, and the auxiliary power supply circuit is controlled to convert the first direct current into a first alternating current.

[0102] In this embodiment, the control end of the first switch and the control end of the second switch may be communicatively connected to the control circuit, so that the control circuit may control the first switch to be opened or closed, and may also control the second switch to be opened or closed.

[0103] In some embodiments, before step S240, the method further includes the following steps S237 to S239:

[0104] In step S237 , a current sampling device is used to receive a current signal representing the first alternating current input to the load device.

[0105] Step S238: When the current signal indicates that the first alternating current is lower than a first set threshold, determine the remaining power of the backup battery.

[0106] In this embodiment, the control circuit may be in communication with the backup battery, so that the control circuit may determine the remaining power of the backup dry cell battery.

[0107] Step S239: When the remaining power of the backup battery exceeds the first set power, the first switch and the second switch are controlled to be closed, and the auxiliary power supply circuit is controlled to convert the fourth direct current output by the backup battery into the first alternating current.

[0108] In this embodiment, the first set power level is, for example, 80%, 90% or 100%, etc., which can be set manually and is not limited here.

[0109] Based on this, step S240 may include the following step S2402:

[0110] Step S2402, when the current signal indicates that the first alternating current is not lower than the first set threshold, controlling the flyback power supply circuit to convert the third direct current output by the power grid into the first alternating current, and controlling the auxiliary power supply circuit to convert the first direct current into the first alternating current, and outputting the first alternating current through the second end of the flyback power supply circuit and the third end of the auxiliary power supply circuit.

[0111] In some examples, the first set threshold is, for example, a voltage value, such as 220V, which can be set manually and is not limited here.

[0112] In other words, when the current signal indicates that the first alternating current is not lower than the first set threshold, it can be considered that the first alternating current output by the power grid and the photovoltaic assembly for the load is relatively stable.

[0113] In some embodiments, the method further includes the following step S310:

[0114] Step S310 , when the remaining power of the backup battery does not exceed the first set power, adjusting the conversion efficiency of the flyback power supply circuit.

[0115] In this embodiment, the conversion efficiency of the flyback power supply circuit can be adjusted through the first primary conversion circuit and the secondary conversion circuit to increase the voltage value of the first alternating current.

[0116] In some embodiments, the method further includes the following steps S410 to S430:

[0117] Step S410: When the current signal indicates that the first alternating current is lower than a second set threshold, the remaining power of the backup battery is determined.

[0118] In this embodiment, when the power grid is powered off, the current value of the first alternating current becomes 0. The second set threshold is 0, for example.

[0119] In step S420, when the remaining power of the backup battery is lower than the second set power, the first switch and the second switch are controlled to be disconnected, and the transformer circuit of the auxiliary power supply circuit is controlled to convert the fourth DC power output by the backup battery into the fifth DC power to enter the shutdown sequence.

[0120] In some examples, a first power supply terminal of the control circuit is connected to a fourth terminal of the auxiliary power supply circuit, and a second power supply terminal of the control circuit is connected to a third terminal of the secondary conversion circuit. A first power switch, a second power switch, and a third power switch are internally disposed within the control circuit. The first power switch is disposed between the first power supply terminal of the control circuit and the fourth terminal of the auxiliary power supply circuit, the second power switch is disposed between the second power supply terminal of the control circuit and the third terminal of the secondary conversion circuit, and the third power switch is disposed between the control circuit and the power grid. When the third switch is closed, the power grid can supply power to the control circuit via a corresponding step-down circuit.

[0121] When the remaining power of the backup battery is lower than the second set power, the first switch and the second switch are controlled to be disconnected, the first power supply switch is controlled to be closed, and the transformer circuit of the auxiliary power supply circuit is controlled to convert the fourth DC power output by the backup battery into the fifth DC power to enter the shutdown timing of the control circuit.

[0122] In some examples, the second set power level is, for example, 20%, 30% or 50%, etc., which can be set manually and is not limited here.

[0123] In step S430, when the remaining power of the backup battery is higher than the second set power, the first switch and the second switch are controlled to be closed, and the auxiliary power supply circuit is controlled to convert the fourth DC power output by the backup battery into the sixth DC power to enter the shutdown sequence of the load device.

[0124] When the remaining power of the backup battery is higher than the second set power, the first switch and the second switch are controlled to be disconnected, the second power supply switch is controlled to be closed, and the transformer circuit of the auxiliary power supply circuit is controlled to convert the fourth DC power output by the backup battery into the fifth DC power, so as to enter the shutdown sequence of the load device and then enter the shutdown sequence of the control circuit.

[0125] <Equipment Example 1>

[0126] Figure 3 FIG. 1 is a block diagram of a control circuit according to an embodiment. Figure 3 As shown, the control circuit 300 may include:

[0127] The response module 310 is configured to respond to a power supply request from a load device and control the flyback power supply circuit to convert the third direct current outputted from the power grid into the first alternating current;

[0128] The detection module 320 is used to detect the voltage value of the first direct current output by the photovoltaic assembly;

[0129] a control module 330 configured to, when the first direct current output by the photovoltaic assembly is within a set second voltage range, control the flyback power supply circuit to convert the first direct current into a first alternating current and output the first alternating current through a second terminal of the flyback power supply circuit, and control the auxiliary power supply circuit to convert the first direct current into a second direct current and output the second direct current through a second terminal of the auxiliary power supply circuit;

[0130] The charging module 340 is used to control the flyback power supply circuit to convert the third direct current into the first alternating current when the first direct current output by the photovoltaic component is within a set first voltage range, and to control the auxiliary power supply circuit to convert the first direct current into the first alternating current, and output the first alternating current through the second end of the flyback power supply circuit and the third end of the auxiliary power supply circuit.

[0131] Optionally, the control module 330 is further configured to control the second switch to be opened and the first switch to be closed, and control the auxiliary power supply circuit to convert the first direct current into the second direct current;

[0132] The charging module 340 is further configured to control the second switch to be closed and the first switch to be open, thereby controlling the auxiliary power supply circuit to convert the first direct current into the first alternating current.

[0133] Optionally, the control circuit 300 also includes a receiving module for receiving a current signal representing the first alternating current input to the load device through a current sampling device; determining the remaining power of the backup battery when the current signal indicates that the first alternating current is lower than a first set threshold; and controlling the first switch and the second switch to close when the remaining power of the backup battery exceeds the first set power, and controlling the auxiliary power supply circuit to convert the fourth direct current output by the backup battery into the first alternating current.

[0134] The control module 330 is further configured to control the flyback power supply circuit to convert the third direct current output by the power grid into the first alternating current when the current signal indicates that the first alternating current is not lower than a first set threshold, and to control the auxiliary power supply circuit to convert the first direct current into the first alternating current, and output the first alternating current through the second end of the flyback power supply circuit and the third end of the auxiliary power supply circuit.

[0135] Optionally, the control circuit 300 further includes an efficiency adjustment module, configured to adjust the conversion efficiency of the flyback power supply circuit when the remaining power of the backup battery does not exceed a first set power.

[0136] Optionally, the control circuit 300 also includes a shutdown module for determining the remaining power of the backup battery when the current signal indicates that the first alternating current is lower than a second set threshold value; when the remaining power of the backup battery is lower than the second set power, controlling the first switch and the second switch to be disconnected, and controlling the transformer circuit of the auxiliary power supply circuit to convert the fourth direct current output by the backup battery into a fifth direct current to enter a shutdown sequence; when the remaining power of the backup battery is higher than the second set power, controlling the first switch and the second switch to be closed, and controlling the auxiliary power supply circuit to convert the fourth direct current output by the backup battery into a sixth direct current to enter a shutdown sequence for the load device.

[0137] The control circuit 300 may be Figure 1 The control circuit 30 in.

[0138] <Equipment Example 2>

[0139] Figure 4 is a schematic diagram of the hardware structure of a control circuit according to another embodiment.

[0140] like Figure 4 As shown, the control circuit 400 includes a processor 410 and a memory 420. The memory 420 is used to store an executable computer program. The processor 410 is used to execute a method as described in any of the above method embodiments under the control of the computer program.

[0141] The control circuit 400 may be the control circuit 30 .

[0142] Each module of the above control circuit 300 can be implemented by the processor 410 in this embodiment executing a computer program stored in the memory 420, or can be implemented by other structures, which is not limited here.

[0143] The present invention may be a system, a method and / or a computer program product. The computer program product may include a computer-readable storage medium carrying computer-readable program instructions for causing a processor to implement various aspects of the present invention.

[0144] A computer-readable storage medium can be a tangible device that can hold and store instructions for use by an instruction execution device. A computer-readable storage medium can be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or raised-in-groove structure on which instructions are stored, and any suitable combination thereof. As used herein, a computer-readable storage medium is not to be construed as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through an electrical wire.

[0145] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions to be stored in the computer-readable storage medium in each computing / processing device.

[0146] The computer program instructions for performing the operations of the present invention may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The computer-readable program instructions may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, the state information of the computer-readable program instructions is used to personalize an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), so that the electronic circuit can execute the computer-readable program instructions, thereby implementing various aspects of the present invention.

[0147] Various aspects of the present invention are described herein with reference to flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present invention. It should be understood that each block of the flowcharts and / or block diagrams, and combinations of blocks in the flowcharts and / or block diagrams, can be implemented by computer-readable program instructions.

[0148] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, thereby producing a machine, so that when these instructions are executed by the processor of the computer or other programmable data processing device, a device is generated that implements the functions / actions specified in one or more blocks in the flowchart and / or block diagram. These computer-readable program instructions can also be stored in a computer-readable storage medium, where these instructions cause the computer, programmable data processing device, and / or other device to operate in a specific manner. Thus, the computer-readable medium storing the instructions comprises an article of manufacture that includes instructions for implementing various aspects of the functions / actions specified in one or more blocks in the flowchart and / or block diagram.

[0149] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device so that a series of operational steps are performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to implement the functions / actions specified in one or more blocks in the flowchart and / or block diagram.

[0150] The flowcharts and block diagrams in the accompanying drawings show the possible implementation architecture, functions and operations of the systems, methods and computer program products according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, program segment or part of an instruction, and a part of the module, program segment or instruction contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or can be implemented using a combination of dedicated hardware and computer instructions. It is well known to those skilled in the art that implementation by hardware, implementation by software, and implementation by a combination of software and hardware are all equivalent.

[0151] While various embodiments of the present invention have been described above, the foregoing description is intended to be illustrative, non-exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or technological improvements in the marketplace, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of the present invention is defined by the appended claims.

Claims

1. A power supply control system, characterized in that: include: A flyback power supply circuit, wherein a first end of the flyback power supply circuit is connected to a power grid, and a second end of the flyback power supply circuit is connected to a load device; An auxiliary power supply circuit, wherein a first end of the auxiliary power supply circuit is connected to a photovoltaic module, a second end of the auxiliary power supply circuit is connected to a backup battery, and a third end of the auxiliary power supply circuit is connected to the load device; A control circuit, wherein the control circuit is communicatively connected with the flyback power supply circuit and the auxiliary power supply circuit respectively; Wherein, the flyback power supply circuit and the auxiliary power supply circuit reuse some rectifying devices, when the first direct current output by the photovoltaic module is within a set first voltage range, the control circuit controls the auxiliary power supply circuit to convert the first direct current into a first alternating current, and outputs the first alternating current through the third end of the auxiliary power supply circuit, and when the first direct current output by the photovoltaic module is within a set second voltage range, the control circuit controls the auxiliary power supply circuit to convert the first direct current into a second direct current, and outputs the second direct current through the second end of the auxiliary power supply circuit; The flyback power supply circuit includes a first primary conversion circuit, a transformer, and a secondary conversion circuit; The first end of the first primary conversion circuit serves as the first end of the flyback power supply, the second end of the first primary conversion circuit is connected to the first primary coil of the transformer, the secondary coil of the transformer is connected to the first end of the secondary conversion circuit, the second end of the secondary conversion circuit serves as the second end of the flyback power supply circuit, and the first primary conversion circuit and the secondary conversion circuit are controlled by the control circuit; Wherein, the flyback power supply circuit and the auxiliary power supply circuit reuse some rectifier devices as the secondary conversion circuit; The auxiliary power supply circuit also includes a second primary conversion circuit and a voltage transformation circuit; The connection point between the first end of the second primary conversion circuit and the first end of the voltage transformation circuit serves as the first end of the auxiliary power supply circuit, the second end of the second primary conversion circuit is connected to the second primary coil of the transformer, the second end of the voltage transformation circuit serves as the second end of the auxiliary power supply, and the second primary conversion circuit is controlled by the control circuit; The auxiliary power supply circuit further includes a first switch and a second switch, wherein the first switch is arranged between the photovoltaic assembly and the second primary conversion circuit, and the second switch is arranged between the photovoltaic assembly and the voltage transformation circuit, and the first switch and the second switch are controlled by the control circuit; The power control system further includes an isolation circuit and a current sampling circuit, wherein a first power supply terminal of the control circuit is connected to a fourth terminal of the auxiliary power supply circuit, a second power supply terminal of the control circuit is connected to a third terminal of the secondary conversion circuit, a sampling terminal of the control circuit is connected to a first terminal of the isolation circuit, a second terminal of the isolation circuit is connected to a first terminal of the current sampling circuit, and a second terminal of the current sampling circuit is connected to a second terminal of the secondary conversion circuit; The control circuit is configured to receive a current signal representing a second direct current input to the load device through the current sampling circuit, and control the conversion efficiency of the flyback power supply circuit and the auxiliary power supply circuit.

2. The power supply control system according to claim 1, characterized in that: The control circuit comprises: A response module, used for responding to a power supply request of the load device, and controlling the flyback power supply circuit to convert the third direct current output by the power grid into the first alternating current; A detection module, used for detecting a voltage value of a first direct current output by the photovoltaic assembly; a control module, configured to control the flyback power supply circuit to convert the first direct current into a first alternating current when the first direct current output by the photovoltaic assembly is within a set second voltage range, and output the first alternating current through the second end of the flyback power supply circuit, and to control the auxiliary power supply circuit to convert the first direct current into a second direct current, and output the second direct current through the second end of the auxiliary power supply circuit; A charging module is used to control the flyback power supply circuit to convert the third direct current into a first alternating current when the first direct current output by the photovoltaic component is within a set first voltage range, and to control the auxiliary power supply circuit to convert the first direct current into a first alternating current, and output the first alternating current through the second end of the flyback power supply circuit and the third end of the auxiliary power supply circuit.

3. A power control method, characterized in that: The power control method is applied to the power control system according to claim 1, the execution subject of the power control method is a control circuit, and the control method includes: In response to a power supply request from the load device, controlling the flyback power supply circuit to convert the third direct current output from the power grid into the first alternating current; Detecting a voltage value of a first direct current output by the photovoltaic assembly; When the first direct current output by the photovoltaic assembly is within a set second voltage range, controlling the flyback power supply circuit to convert the first direct current into a first alternating current, and outputting the first alternating current through the second end of the flyback power supply circuit, and controlling the auxiliary power supply circuit to convert the first direct current into a second direct current, and outputting the second direct current through the second end of the auxiliary power supply circuit; When the first direct current output by the photovoltaic component is within a set first voltage range, the flyback power supply circuit is controlled to convert the third direct current output by the power grid into a first alternating current, and the auxiliary power supply circuit is controlled to convert the first direct current into a first alternating current, and the first alternating current is output through the second end of the flyback power supply circuit and the third end of the auxiliary power supply circuit.

4. The method according to claim 3, characterized in that The auxiliary power supply circuit further includes a first switch and a second switch, wherein the first switch is arranged between the photovoltaic assembly and the second primary conversion circuit, and the second switch is arranged between the photovoltaic assembly and the voltage transformation circuit, and the first switch and the second switch are controlled by the control circuit; The controlling the auxiliary power supply circuit to convert the first direct current into a second direct current comprises: Controlling the second switch to be opened and the first switch to be closed, and controlling the auxiliary power supply circuit to convert the first direct current into a second direct current; The controlling the auxiliary power circuit to convert the first direct current into a first alternating current comprises: The second switch is controlled to be closed and the first switch is controlled to be open, and the auxiliary power supply circuit is controlled to convert the first direct current into a first alternating current.

5. The method according to claim 4, characterized in that The power supply control system also includes an isolation circuit and a current sampling circuit; Before controlling the flyback power supply circuit to convert the third direct current outputted by the power grid into the first alternating current, and controlling the auxiliary power supply circuit to convert the first direct current into the first alternating current, and outputting the first alternating current through the second end of the flyback power supply circuit and the third end of the auxiliary power supply circuit, the method further includes: Receiving, by the current sampling device, a current signal representing a first alternating current input to the load device; When the current signal indicates that the first alternating current is lower than a first set threshold, determining the remaining power of the backup battery; When the remaining power of the backup battery exceeds a first set power, controlling the first switch and the second switch to close, and controlling the auxiliary power supply circuit to convert the fourth direct current output by the backup battery into the first alternating current; The controlling the flyback power supply circuit to convert the third direct current outputted by the power grid into the first alternating current, and controlling the auxiliary power supply circuit to convert the first direct current into the first alternating current, and outputting the first alternating current through the second end of the flyback power supply circuit and the third end of the auxiliary power supply circuit, comprises: When the current signal indicates that the first alternating current is not lower than a first set threshold, the flyback power supply circuit is controlled to convert the third direct current output by the power grid into the first alternating current, and the auxiliary power supply circuit is controlled to convert the first direct current into the first alternating current, and the first alternating current is output through the second end of the flyback power supply circuit and the third end of the auxiliary power supply circuit.

6. The method according to claim 4, characterized in that The method further comprises: When the remaining power of the backup battery does not exceed the first set power, the conversion efficiency of the flyback power supply circuit is adjusted.

7. The method according to claim 4, characterized in that The first power supply terminal of the control circuit is connected to the fourth terminal of the auxiliary power supply circuit, and the second power supply terminal of the control circuit is connected to the third terminal of the secondary conversion circuit; the method further includes: When the current signal indicates that the first alternating current is lower than a second set threshold, determining the remaining power of the backup battery; When the remaining power of the backup battery is lower than a second set power, the first switch and the second switch are controlled to be disconnected, and the transformer circuit of the auxiliary power supply circuit is controlled to convert the fourth direct current output by the backup battery into the fifth direct current, so as to enter a shutdown sequence; When the remaining power of the backup battery is higher than the second set power, the first switch and the second switch are controlled to be closed, and the auxiliary power supply circuit is controlled to convert the fourth direct current output by the backup battery into the sixth direct current to enter the shutdown sequence of the load device.

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