CN118263917A

CN118263917A - Battery control system, method and device

Info

Publication number: CN118263917A
Application number: CN202410431683.XA
Authority: CN
Inventors: 唐景新
Original assignee: Changzhou Chuanglian Power Supply Co ltd
Current assignee: Changzhou Chuanglian Power Supply Co ltd
Filing date: 2024-04-11
Publication date: 2024-06-28

Abstract

The invention relates to a power supply control system, a method and a device, wherein the power supply control system comprises a flyback power supply circuit, a first end of the flyback power supply circuit is connected with a power grid, and a second end of the flyback power supply circuit is connected with load equipment; the first end of the auxiliary power supply circuit is connected with the photovoltaic module, the second end of the auxiliary power supply is connected with the standby battery, and the third end of the auxiliary power supply circuit is connected with the load equipment; and the control circuit is respectively in communication connection with the flyback power supply circuit and the auxiliary power supply circuit.

Description

Battery control system, method and device

Technical Field

The embodiment of the disclosure relates to the technical field of power supply control, and more particularly relates to a battery control system, a battery control method and a battery control device.

Background

With the rapid development of power technology, the power supply is used as a more reliable energy source, and better stability is required. At present, in order to realize more stable alternating current output to load equipment, a flyback power supply circuit can be adopted in the prior art, and the conversion efficiency of the flyback power supply circuit is controlled by collecting the current of the load equipment. But the power grid alone supplies power to the load devices, so that the energy consumption is high.

Disclosure of Invention

It is an object of embodiments of the present disclosure to provide a new solution for battery control.

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

The flyback power supply circuit is connected with the power grid at a first end, and connected with load equipment at a second end;

The first end of the auxiliary power supply circuit is connected with the photovoltaic module, the second end of the auxiliary power supply is connected with the standby battery, and the third end of the auxiliary power supply circuit is connected with the load equipment;

the control circuit is respectively in communication connection with the flyback power supply circuit and the auxiliary power supply circuit;

The flyback power supply circuit and the auxiliary power supply circuit multiplex part rectifier device, when the first direct current output by the photovoltaic module is in a set first voltage range, the control circuit controls the auxiliary power supply circuit to convert the first direct current into first alternating current and output the first alternating current through a third end of the auxiliary power supply circuit, and when the first direct current output by the photovoltaic module is in a set second voltage range, the control circuit controls the auxiliary power supply circuit to convert the first direct current into second direct current and output the second direct current through a second end of the auxiliary power supply circuit.

Optionally, the flyback power supply circuit comprises a first primary conversion circuit, a transformer and a secondary conversion circuit;

the first end of the first primary conversion circuit is used as the first end of the flyback power supply, the second end of the first primary conversion circuit is connected with the first primary coil of the transformer, the secondary coil of the transformer is connected with the first end of the secondary conversion circuit, the second end of the secondary conversion circuit is used 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;

And the flyback power supply circuit and the auxiliary power supply circuit multiplex part of rectifying devices are the secondary conversion circuit.

Optionally, the auxiliary power circuit further comprises a second primary conversion circuit and a voltage transformation circuit;

The connection point of the first end of the second primary conversion circuit and the first end of the voltage transformation circuit is used as the first end of the auxiliary power supply circuit, the second end of the second primary conversion circuit is connected with the second primary coil of the transformer, the second end of the voltage transformation circuit is used as the second end of the auxiliary power supply, and the second primary conversion circuit is controlled by the control circuit.

Optionally, the auxiliary power circuit further includes a first switch and a second switch, the first switch is disposed between the photovoltaic module and the second primary conversion circuit, the second switch is disposed between the photovoltaic module and the voltage transformation circuit, and the first switch and the second switch are controlled by the control circuit.

Optionally, the power supply control system further includes an isolation circuit and a current sampling circuit, a first power supply end of the control circuit is connected with a fourth end of the auxiliary power supply circuit, a second power supply end of the control circuit is connected with a third end of the secondary conversion circuit, a sampling end of the control circuit is connected with a first end of the isolation circuit, a second end of the isolation circuit is connected with a first end of the current sampling circuit, and a second end of the current sampling circuit is connected with a second end of the secondary conversion circuit;

Wherein the control circuit is arranged to control the conversion efficiency of the flyback power supply circuit and the auxiliary power supply circuit by receiving, by the current sampling circuit, a current signal representative of a second direct current input to the load device.

According to a second aspect of the present invention, there is also provided a power supply control method applied to the power supply control system according to the first aspect, wherein an execution subject of the power supply control method is a control circuit, and the control method includes:

Responding to a power supply request of the load equipment, and controlling the flyback power supply circuit to convert the third direct current output by the power grid into first alternating current;

Detecting a voltage value of a first direct current output by the photovoltaic module;

When the first direct current output by the photovoltaic module is in a set second voltage range, controlling the flyback power supply circuit to convert the first direct current into first alternating current, outputting the first alternating current through a second end of the flyback power supply circuit, and controlling the auxiliary power supply circuit to convert the first direct current into second direct current, and outputting the second direct current through a second end of the auxiliary power supply circuit;

when the first direct current output by the photovoltaic module is in a set first voltage range, the flyback power supply circuit is controlled to convert the third direct current output by the power grid into first alternating current, the auxiliary power supply circuit is controlled to convert the first direct current into 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.

Optionally, the auxiliary power supply circuit further comprises a first switch and a second switch, the first switch is arranged between the photovoltaic module and the second primary conversion circuit, the second switch is arranged between the photovoltaic module and the voltage transformation circuit, and the first switch and the second switch are controlled by the control circuit;

the controlling the auxiliary power circuit to convert the first direct current to a second direct current includes:

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

the controlling the auxiliary power circuit to convert the first direct current to a first alternating current includes:

And controlling the second switch to be closed, and controlling the auxiliary power circuit to convert the first direct current into first alternating current by opening the first switch.

Optionally, the power supply control system further comprises an isolation circuit and a current sampling circuit;

The method further includes, before the 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 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:

receiving, by the current sampling apparatus, a current signal representative of a first alternating current input to the load device;

determining a remaining capacity of the backup battery when the current signal indicates that the first alternating current is below a first set threshold;

When the residual electric quantity of the standby battery exceeds a first set electric quantity, controlling the first switch and the second switch to be closed, and controlling the auxiliary power circuit to convert fourth direct current output by the standby battery into first alternating current;

The 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 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, includes:

When the current signal indicates that the first alternating current is not lower than a first set threshold value, the flyback power supply circuit is controlled to convert the third direct current output by the power grid into the first alternating current, 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.

Optionally, the method further comprises:

And when the residual electric quantity of the standby battery does not exceed the first set electric quantity, adjusting the conversion efficiency of the flyback power supply circuit.

Optionally, the method further comprises:

Determining a remaining capacity of the backup battery when the current signal indicates that the first alternating current is below a second set threshold;

when the residual electric quantity of the standby battery is lower than a second set electric quantity, the first switch and the second switch are controlled to be turned off, and a voltage transformation circuit of the auxiliary power supply circuit is controlled to convert fourth direct current output by the standby battery into fifth direct current so as to enter a shutdown time sequence;

and when the residual electric quantity of the standby battery is higher than a second set electric quantity, controlling the first switch and the second switch to be closed, and controlling the auxiliary power circuit to convert the fourth direct current output by the standby battery into the sixth direct current so as to enter a shutdown time sequence of the load equipment.

According to a third aspect of the present invention, there is also provided a control circuit comprising:

The response module is used for responding to the power supply request of the load equipment and controlling the flyback power supply circuit to convert the third direct current output by the power grid into first alternating current;

the detection module is used for detecting a voltage value of the first direct current output by the photovoltaic module;

The control module is used for controlling the flyback power supply circuit to convert the first direct current into first alternating current and output the first alternating current through the second end of the flyback power supply circuit when the first direct current output by the photovoltaic module is in a set second voltage range, and controlling the auxiliary power supply circuit to convert the first direct current into second direct current and output the second direct current through the second end of the auxiliary power supply circuit;

And the charging module is used for controlling the flyback power supply circuit to convert the third direct current into first alternating current when the first direct current output by the photovoltaic module is in a set first voltage range, controlling the auxiliary power supply circuit to convert the first direct current into 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.

According to a fourth aspect of the present invention, there is also provided an artificial intelligence based power resource processing apparatus comprising a memory for storing a computer program and a processor; the processor is configured to execute the computer program to implement the method according to the first aspect of the invention.

According to a fifth aspect of the present invention there is also provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method according to the first aspect of the present invention.

The photovoltaic module power supply control system has the advantages that when the first direct current output by the photovoltaic module is in a set first voltage range, the control circuit can control the flyback power supply circuit to supply power to the load equipment, and when the first direct current output by the photovoltaic module is in a set second voltage range, the control circuit can control the auxiliary power supply circuit and the flyback power supply circuit to supply power to the load equipment so as to supply power to the load equipment through the photovoltaic module, and therefore energy consumption of the power supply control system can be effectively reduced.

Other features of the disclosed embodiments, as well as their advantages, will become apparent from the following detailed description of exemplary embodiments of the invention, which refers to the accompanying drawings.

Drawings

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

FIG. 1 is a schematic diagram of a constituent structure to which a power supply control system according to one embodiment can be applied;

FIG. 2 is a flow diagram of a power control method according to one embodiment;

FIG. 3 is a block schematic diagram of a power control device according to one embodiment;

fig. 4 is a schematic diagram of a hardware configuration of a power supply control device according to an embodiment.

Detailed Description

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

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

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

< System example >

Fig. 1 is a schematic diagram of a composition structure to which a power supply control system according to an embodiment can be applied. As shown in fig. 1, the system includes a flyback power supply circuit, an auxiliary power supply circuit, and a control circuit 30.

A first end of the flyback power supply circuit is connected to the power grid 10 and a second end of the flyback power supply circuit is connected to the load device 50.

A first end of the auxiliary power circuit is connected to the photovoltaic module 20, a second end of the auxiliary power circuit is connected to the backup battery 40, and a third end of the auxiliary power circuit is connected to the load device 50.

The control circuit 30 is communicatively coupled to the flyback power supply circuit and the auxiliary power supply circuit, respectively.

The flyback power supply circuit and the auxiliary power supply circuit multiplex part of the rectifying device, when the first direct current output by the photovoltaic module 20 is in a set first voltage range, the control circuit 30 controls the auxiliary power supply circuit to convert the first direct current into the first alternating current and output 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 20 is in a set second voltage range, the control circuit 30 controls the auxiliary power supply circuit to convert the first direct current into the second direct current and output the second direct current through the second end of the auxiliary power supply circuit.

In this embodiment, the flyback power supply circuit may be a dc-ac conversion circuit, and the auxiliary power supply circuit may enable the dc-ac conversion circuit, and the two dc-ac conversion circuits may be isolated dc-ac conversion circuits or non-isolated dc-ac conversion circuits, which are not limited herein.

In the present embodiment, the control circuit 30 is, for example, a control chip, and has functions of communication, receiving analog signals, data calculation, data storage, and the like, and is not limited thereto.

In some examples, the first direct current and the second direct current may be direct currents of different voltage values or current values.

In this embodiment, the minimum value of the first voltage range may be equal to the maximum value of the second voltage range. The first voltage range and the second voltage range may be set according to the first direct current output by the photovoltaic module 20, the operating voltage of the load device 50, and other factors, and the first voltage range and the second voltage range are set manually, which is not limited herein.

In some examples, as shown in fig. 1, a control switch K0 is provided between the power grid 10 and the flyback power supply circuit, and the control switch K0 may be controlled to be opened or closed by the control circuit 30.

In other words, when the first direct current output by the photovoltaic module 20 is within the set first voltage range, the control circuit 30 may control the flyback power supply circuit to supply power to the load device 50, and when the first direct current output by the photovoltaic module 20 is within the set second voltage range, the control circuit 30 may control the auxiliary power supply circuit and the flyback power supply circuit to supply power to the load device 50, so as to supply power to the load device 50 through the photovoltaic module 20, thereby effectively reducing the energy consumption of the power supply control system.

In some embodiments, the flyback power supply circuit comprises a first primary conversion circuit 1, a transformer T1, a secondary conversion circuit 3; the first end of the first primary conversion circuit 1 is used as the first end of a flyback power supply, the second end of the first primary conversion circuit 1 is connected with the first primary coil of the transformer T1, the secondary coil of the transformer T1 is connected with the first end of the secondary conversion circuit 3, the second end of the secondary conversion circuit 3 is used 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 multiplex part of the rectifying device into a secondary conversion circuit 3.

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.

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

In some embodiments, the auxiliary power circuit further comprises a second primary conversion circuit 2 and a transformation circuit 6; the connection point of the first end of the second primary conversion circuit 2 and the first end of the voltage transformation circuit 6 is used as the first end of the auxiliary power supply circuit, the second end of the second primary conversion circuit 2 is connected with the second primary coil of the transformer T1, the second end of the voltage transformation circuit 6 is used as the second end of the auxiliary power supply, and the second primary conversion circuit 2 is controlled by the control circuit 30.

In this embodiment, the second primary converting circuit 2 is a conventional dc-ac converting circuit, and the transforming circuit 6 may be a dc-dc converting circuit, which may be a step-up circuit or a step-down circuit, which is not limited herein.

In other words, by providing the second primary conversion circuit 2 and the voltage transformation circuit 6, the photovoltaic module 20 or the backup battery 40 can supplement power to the power grid 10 in the process of supplying power to the load device 50 by the power grid 10, so as to improve the stability of power supply of the power supply control system.

In some embodiments, as shown in fig. 1, the auxiliary power circuit further includes a first switch K1 and a second switch K2, the first switch K1 is disposed between the photovoltaic module 20 and the second primary conversion circuit 2, the second switch K2 is disposed between the photovoltaic module 20 and the voltage transformation circuit 6, and the first switch K1 and the second switch K2 are controlled by the control circuit 30.

In this embodiment, when the first switch K1 is closed and the second switch K2 is opened, the photovoltaic module 20 may supply power to the backup battery 40 or to the control circuit 30 through the voltage transformation circuit 6. When the first switch K1 is opened and the second switch K2 is closed, the photovoltaic module 20 may supply power to the load device 50 through the auxiliary power circuit. When both the first switch K1 and the second switch K2 are closed, the backup battery 40 may supply power to the load device 50 through the auxiliary power supply circuit, or may supply power to the control circuit 30 through the auxiliary power supply circuit.

In other words, by providing the first switch K1 and the second switch K2, the lines in the auxiliary power circuit can be multiplexed to realize the functions of discharging the backup battery 40 and discharging the photovoltaic module 20, so as to improve the utilization efficiency of the power control system.

In some embodiments, the power supply control system further comprises an isolation circuit 5 and a current sampling circuit 4, wherein the first power supply end of the control circuit 30 is connected with the fourth end of the auxiliary power supply circuit, the second power supply end of the control circuit 30 is connected with the third end of the secondary conversion circuit 3, the sampling end of the control circuit 30 is connected with the first end of the isolation circuit 5, the second end of the isolation circuit 5 is connected with the first end of the current sampling circuit 4, and the second end of the current sampling circuit 4 is connected with the second end of the secondary conversion circuit 3; wherein the control circuit 30 is arranged to control the conversion efficiency of the flyback power supply circuit and the auxiliary power supply circuit by receiving a current signal representative of the first alternating current input to the load device 50 via the current sampling circuit 4.

In this embodiment, the isolation circuit 5 is, for example, an existing optocoupler, and the current sampling circuit 4 may be connected to the negative electrode of the second end of the secondary conversion circuit 3 to collect the current of the second end of the secondary conversion circuit 3. The control circuit 30 may output PWM wave signals of different duty ratios through the collected current to control conversion efficiencies of the first primary conversion circuit 1, the second primary conversion circuit 2, and the secondary conversion circuit 3. The conversion efficiency of the conversion circuit is controlled by PWM wave signals with different duty ratios in the prior art, which is not described herein in detail.

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

In application to the disclosed embodiments, the control circuit 30 memory is used to store a computer program for controlling the circuit 30 processor to operate in accordance with the artificial intelligence-based power resource processing method of any of the embodiments. The skilled person may design a computer program according to the solution of the embodiments of the present disclosure. How the computer program controls the processor to operate is well known in the art and will not be described in detail here.

< Method example >

Fig. 2 is a flow diagram of a power control method according to one embodiment. The implementation body is, for example, the control circuit in fig. 1.

As shown in fig. 2, the power control method of the present embodiment may include the following steps S210 to S240:

In step S210, in response to a power supply request of the load device, the flyback power supply circuit is controlled to convert the third dc power output by the power grid into the first ac power.

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 for power supply to the control circuit.

In this embodiment, the load device is, for example, an electric vehicle, an electric locker, or a household device, and the like, and is not limited herein.

In some examples, the control circuit may control the first primary conversion circuit and the secondary conversion circuit by outputting PWM waves of different duty cycles such that the third direct current output by the power grid is converted into the first alternating current for output to the load device.

Step S220, detecting a voltage value of the first direct current output by the photovoltaic module.

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

And step S230, when the first direct current output by the photovoltaic module is in the set first voltage range, controlling the flyback power supply circuit to convert the third direct current output by the power grid into first alternating current, and controlling the auxiliary power supply circuit to convert the first direct current into 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.

Step S240, when the first direct current output by the photovoltaic module is in the set second voltage range, the flyback power supply circuit is controlled to convert the first direct current into the first alternating current, the first alternating current is output through the second end of the flyback power supply circuit, and the auxiliary power supply circuit is controlled to convert the first direct current into the second direct current, and the second direct current is output through the second end of the auxiliary power supply circuit.

In some examples, the minimum value of the first voltage range may be equal to the maximum value of the second voltage range (voltage value a, voltage value B), the second voltage range (voltage value C, voltage value a). Because the illumination intensity is gradually increased and then gradually reduced in one day, in the first time period, the first direct current output by the photovoltaic module is in the first voltage range, in the second time period, the first direct current output by the photovoltaic module is in the second voltage range, and in the third time period, the first direct current output by the photovoltaic module is in the first voltage range. Wherein the second time period is between the first time period and the third time period.

In the first time period and the third time period, the control circuit can control the voltage transformation circuit to convert the first direct current output by the photovoltaic module into the second direct current and output the second direct current to the standby battery so as to charge the standby battery, so that the utilization rate of the first direct current output by the photovoltaic module is improved.

In a 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 module into first alternating current, so that the photovoltaic module can supply power to the load equipment by using the first stable direct current.

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

when the first direct current output by the photovoltaic module is in a set second voltage range, the second switch is controlled to be opened, the first switch is controlled to be closed, and the auxiliary power supply circuit is controlled to convert the first direct current into the second direct current.

Step S240 may include the following step S2401:

In step S2401, when the first direct current output by the photovoltaic module is within the set first voltage range, the second switch is controlled to be closed, the first switch is controlled to be opened, and the auxiliary power circuit is controlled to convert the first direct current into the first alternating current.

In this embodiment, the control end of the first switch and the control end of the second switch may be connected in communication with 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.

In some embodiments, prior to step S240, the method further comprises the following steps S237 to S239:

in step S237, a current signal representing the first alternating current input to the load device is received by the current sampling means.

In step S238, when the current signal indicates that the first ac power is lower than the first set threshold, the remaining power of the backup battery is determined.

In this embodiment, the control circuit may be communicatively connected to the backup battery, so that the control circuit may determine the remaining power of the backup dry battery.

In 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 circuit is controlled to convert the fourth dc power output by the backup battery into the first ac power.

In this embodiment, the first set electric quantity is, for example, 80%,90% or 100%, etc., and may be set manually, which is not limited herein.

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

In step S2402, when the current signal indicates that the first ac power is not lower than the first set threshold, the flyback power supply circuit is controlled to convert the third dc power output by the power grid into the first ac power, and the auxiliary power supply circuit is controlled to convert the first dc power into the first ac power, and the first ac power is output through the second end of the flyback power supply circuit and the third end of the auxiliary power supply circuit.

In some examples, the first set threshold is, for example, a voltage value, for example, 220V, which may be set by a person, and is not limited herein.

In other words, when the current signal indicates that the first alternating current is not lower than the first set threshold, the power grid and the photovoltaic module can be considered to be relatively stable in outputting the first alternating current for the load.

In some embodiments, the method further comprises the step of S310:

In step S310, 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.

In this embodiment, the conversion efficiency of the flyback power supply circuit can be adjusted by the first primary conversion circuit and the secondary conversion circuit, so as to improve the voltage value of the first alternating current.

In some embodiments, the method further comprises the following steps S410 to S430:

In step S410, when the current signal indicates that the first ac power is lower than the second set threshold, the remaining power of the backup battery is determined.

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, for example, 0.

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 turned off, and the voltage transformation circuit of the auxiliary power 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.

In some examples, a first power supply end of the control circuit is connected with a fourth end of the auxiliary power supply circuit, a second power supply end of the control circuit is connected with a third end of the secondary conversion circuit, a first power supply switch, a second power supply switch and a third power supply switch are arranged inside the control circuit, the first power supply switch is arranged between the first power supply end of the control circuit and the fourth end of the auxiliary power supply circuit, the second power supply switch is arranged between the second power supply end of the control circuit and the third end of the secondary conversion circuit, and the third power supply switch is arranged between the control circuit and a power grid. When the third switch is closed, the power grid can supply power for the control circuit through the corresponding voltage reduction circuit.

When the residual electric quantity of the standby battery is lower than the second set electric quantity, the first switch and the second switch are controlled to be opened, the first power supply switch is controlled to be closed, and the voltage transformation circuit of the auxiliary power supply circuit is controlled to convert the fourth direct current output by the standby battery into the fifth direct current so as to enter a shutdown time sequence of the control circuit.

In some examples, the second set power is, for example, 20%,30% or 50%, etc., and may be set manually, which is not limited herein.

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 circuit is controlled to convert the fourth dc power output by the backup battery into the sixth dc power, so as to enter the shutdown timing of the load device.

When the residual electric quantity of the standby battery is higher than the second set electric quantity, the first switch and the second switch are controlled to be opened, the second power supply switch is controlled to be closed, and the voltage transformation circuit of the auxiliary power supply circuit is controlled to convert the fourth direct current output by the standby battery into the fifth direct current so as to enter the shutdown time sequence of the load equipment and then enter the shutdown time sequence of the control circuit.

< Device example one >

Fig. 3 is a functional block diagram of a control circuit according to one embodiment. As shown in fig. 3, the control circuit 300 may include:

a response module 310, configured to control the flyback power supply circuit to convert the third dc power output by the power grid into a first ac power in response to a power supply request of the load device;

The detection module 320 is configured to detect a voltage value of the first direct current output by the photovoltaic module;

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

The charging module 340 is configured 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 module is within the set first voltage range, and 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.

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

the charging module 340 is further configured to control the second switch to be closed, and the first switch to be opened, and control the auxiliary power circuit to convert the first direct current into the first alternating current.

Optionally, the control circuit 300 further comprises a receiving module for receiving, by the current sampling means, a current signal representative of the first alternating current input to the load device; determining the residual capacity of the standby battery when the current signal indicates that the first alternating current is lower than a first set threshold value; when the residual electric quantity of the standby battery exceeds the first set electric quantity, the first switch and the second switch are controlled to be closed, and the auxiliary power circuit is controlled to convert the fourth direct current output by the standby battery into first alternating current.

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 the first set threshold, and 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.

Optionally, the control circuit 300 further includes an efficiency adjustment module for adjusting the conversion efficiency of the flyback power supply circuit when the remaining power of the backup battery does not exceed the first set power.

Optionally, the control circuit 300 further includes a shutdown module for determining a remaining power of the backup battery when the current signal indicates that the first ac power is lower than a second set threshold; when the residual electric quantity of the standby battery is lower than the second set electric quantity, the first switch and the second switch are controlled to be disconnected, and the voltage transformation circuit of the auxiliary power supply circuit is controlled to convert the fourth direct current output by the standby battery into the fifth direct current so as to enter a shutdown time sequence; when the residual electric quantity of the standby battery is higher than the second set electric quantity, the first switch and the second switch are controlled to be closed, and the auxiliary power circuit is controlled to convert the fourth direct current output by the standby battery into the sixth direct current so as to enter a shutdown time sequence of the load equipment.

The control circuit 300 may be the control circuit 30 of fig. 1.

< Device example two >

Fig. 4 is a schematic diagram of a hardware configuration of a control circuit according to another embodiment.

As shown in fig. 4, the control circuit 400 comprises a processor 410 and a memory 420, the memory 420 being for storing an executable computer program, the processor 410 being for performing a method as any of the method embodiments above, according to the control of the computer program.

The control circuit 400 may be the control circuit 30.

The above modules of the control circuit 300 may be implemented by the processor 410 executing the computer program stored in the memory 420 in the present embodiment, or may be implemented by other structures, which are not limited herein.

The present invention may be a system, method, and/or computer program product. The computer program product may include a computer readable storage medium having computer readable program instructions embodied thereon for causing a processor to implement aspects of the present invention.

The computer readable storage medium may be a tangible device that can hold and store instructions for use by an instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: portable computer disks, hard disks, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static Random Access Memory (SRAM), portable compact disk read-only memory (CD-ROM), digital Versatile Disks (DVD), memory sticks, floppy disks, mechanical coding devices, punch cards or in-groove structures such as punch cards or grooves having instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media, as used herein, are not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (e.g., optical pulses through fiber optic cables), or electrical signals transmitted through wires.

The computer readable program instructions described herein may be downloaded from a computer readable storage medium to a respective computing/processing device or to an external computer or external storage device over a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmissions, wireless transmissions, routers, firewalls, switches, gateway computers and/or edge servers. The network interface card or network interface in each computing/processing device receives computer readable program instructions from the network and forwards the computer readable program instructions for storage in a computer readable storage medium in the respective computing/processing device.

Computer program instructions for carrying out operations of the present invention may be assembly instructions, instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as SMALLTALK, C ++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer readable program instructions may be executed entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, aspects of the present invention are implemented by personalizing electronic circuitry, such as programmable logic circuitry, field Programmable Gate Arrays (FPGAs), or Programmable Logic Arrays (PLAs), with state information for computer readable program instructions, which can execute the computer readable program instructions.

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

These computer readable program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer readable program instructions may also be stored in a computer readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer readable medium having the instructions stored therein includes an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.

The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.

The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose 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.

The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the invention is defined by the appended claims.

Claims

1. A power control system, comprising:

2. The system of claim 1, wherein the flyback power supply circuit comprises a first primary conversion circuit, a transformer, a secondary conversion circuit;

3. The system of claim 1, wherein the auxiliary power circuit further comprises a second primary conversion circuit and a transformer circuit;

4. The system of claim 3, wherein the auxiliary power circuit further comprises a first switch and a second switch, the first switch disposed between the photovoltaic module and the second primary conversion circuit, the second switch disposed between the photovoltaic module and the voltage transformation circuit, the first switch and the second switch controlled by the control circuit.

5. The system of claim 2, wherein the power control system further comprises an isolation circuit and a current sampling circuit, a first power supply terminal of the control circuit being connected to the fourth terminal of the auxiliary power circuit, a second power supply terminal of the control circuit being connected to the third terminal of the secondary conversion circuit, a sampling terminal of the control circuit being connected to the first terminal of the isolation circuit, a second terminal of the isolation circuit being connected to the first terminal of the current sampling circuit, a second terminal of the current sampling circuit being connected to the second terminal of the secondary conversion circuit;

6. A power supply control method, wherein the power supply control method is applied to the power supply control system according to any one of claims 1 to 5, and an execution subject of the power supply control method is a control circuit, and the control method includes:

7. The method of claim 6, wherein the auxiliary power circuit further comprises a first switch and a second switch, the first switch disposed between the photovoltaic module and the second primary conversion circuit, the second switch disposed between the photovoltaic module and the voltage transformation circuit, the first switch and the second switch controlled by the control circuit;

8. The method of claim 7, wherein the power control system further comprises an isolation circuit and a current sampling circuit;

9. The method of claim 7, wherein the method further comprises:

10. The method of claim 7, wherein a first power supply terminal of the control circuit is connected to a fourth terminal of the auxiliary power circuit, and a second power supply terminal of the control circuit is connected to a third terminal of the secondary conversion circuit; the method further comprises the steps of:

11. A control circuit, comprising: