Power supply method, power supply system and energy storage device

Abstract

The application provides a power supply method, a power supply system and an energy storage device, and relates to the technical field of electric power. The method obtains the maximum output power and the corresponding output voltage of each input power source through a maximum power tracking module; determines a first input circuit and a first voltage according to the maximum output power; controls a bypass module of the first input circuit to bypass the voltage conversion module of the first input circuit, and controls the voltage conversion modules of other input circuits to convert the voltage output by the maximum power tracking module to output the first voltage to the voltage conversion circuit; and controls the voltage conversion circuit to convert the first voltage to output the required voltage according to the required voltage of the load, wherein the first input circuit is the input circuit with the maximum value in the maximum output power, and the first voltage is the output voltage corresponding to the maximum output power of the first input circuit. The technical scheme provided by the application can improve the power supply efficiency of the multi-input power supply system.

Description

Technical Field

[0001] This application relates to the field of power technology, and in particular to a power supply method, power supply system and energy storage device. Background Technology

[0002] With the continuous advancement of new energy technologies, new energy sources such as solar and wind power are becoming increasingly popular due to their advantages of being clean, environmentally friendly, and renewable.

[0003] Due to the instability of new energy sources such as solar and wind power, multiple input sources are usually used to supply power.

[0004] The maximum power of different input sources at the same time usually varies, and the maximum power of the same input source may also vary at different times. Therefore, how to improve the power supply efficiency of a multi-input source power supply system is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, this application provides a power supply method, a power supply system and an energy storage device to improve the power supply efficiency of a multi-input source power supply system.

[0006] To achieve the above objectives, in a first aspect, embodiments of this application provide a power supply method applied to a power supply system. The power supply system includes a voltage conversion circuit and several parallel input circuits. Each input circuit includes a maximum power point tracking (MPPT) module, a voltage conversion module, and a bypass module. The input terminal of the MPPT module is connected to an input power source. The output terminal of the MPPT module is connected to the input terminal of the voltage conversion circuit through the voltage conversion module. The bypass module is connected in parallel with the voltage conversion module. The output terminal of the voltage conversion circuit is connected to a load. The power supply method includes: The maximum output power and its corresponding output voltage of each input power source are obtained through the maximum power tracking module. The first input circuit and the first voltage are determined based on the maximum output power of each of the aforementioned maximum output powers. The first input circuit is the input circuit where the maximum value of each of the aforementioned maximum output powers is located, and the first voltage is the output voltage corresponding to the maximum output power of the first input circuit. The system controls the first input circuit to output the first voltage and controls the bypass module of the first input circuit to work so as to bypass the voltage conversion module of the first input circuit. It also controls the voltage conversion modules of other input circuits to convert the voltage output by the maximum power point tracking module so as to output the first voltage to the voltage conversion circuit. Based on the required voltage of the load, the voltage conversion circuit is controlled to convert the first voltage to output the required voltage.

[0007] As an optional implementation of this application, the step of controlling the bypass module of the first input circuit to bypass the voltage conversion module of the first input circuit includes: A bypass signal is output to the bypass module of the first input circuit. The bypass signal is used to instruct the bypass module to turn on the connection between the maximum power point tracking module and the voltage conversion circuit, so as to bypass the voltage conversion module of the first input circuit.

[0008] As an optional implementation of this application, the voltage conversion module controlling other input circuits converts the voltage output by the maximum power point tracking module to output the first voltage to the voltage conversion circuit, including: The maximum power tracking modules of each of the other input circuits are controlled to operate at their respective maximum power tracking points; Based on the output voltage of the maximum power tracking module of each of the other input circuits and the first voltage, a first control signal for the voltage conversion module in each of the other input circuits is determined. The first control signal is used to control the switching frequency and duty cycle of the switching transistor in the voltage conversion module. The first control signal is sent to the voltage conversion module so that the voltage conversion module converts the voltage output by the maximum power tracking module of the other input circuit into the first voltage and outputs it to the voltage conversion circuit.

[0009] As an optional implementation of this application, controlling the voltage conversion circuit to convert the first voltage to output the required voltage includes: A second control signal is determined based on the required voltage and the first voltage. The second control signal is used to control the switching frequency and duty cycle of the switching transistor in the voltage conversion circuit. The second control signal is sent to the voltage conversion circuit so that the voltage conversion circuit converts the first voltage to output the required voltage.

[0010] As an optional implementation of this application, the method further includes: Obtain timing information, and when the timing information reaches the preset time information, return to execute the step of obtaining the maximum output power and corresponding output voltage of each input power supply through the maximum power tracking module.

[0011] As an optional implementation of this application, the method further includes: When the load's required voltage changes, the voltage conversion circuit is controlled to convert the first voltage according to the changed required voltage and the first voltage to output the changed required voltage.

[0012] As an optional implementation of this application, the method further includes: When the load connected to the output terminal of the voltage conversion circuit changes, the required voltage of the changed load is obtained, and the voltage conversion circuit is controlled to convert the first voltage according to the required voltage of the changed load and the first voltage to output the required voltage of the changed load.

[0013] As an optional implementation of this application, the method further includes: When the load connected to the output of the voltage conversion circuit changes, the process returns to the step of obtaining the maximum output power and corresponding output voltage of each input power source through the maximum power tracking module.

[0014] Secondly, embodiments of this application provide a power supply system, including a voltage conversion circuit, a control circuit, and several parallel input circuits. Each input circuit includes a maximum power point tracking (MPPT) module, a voltage conversion module, and a bypass module. The input terminal of the MPPT module is connected to an input power source. The output terminal of the MPPT module is connected to the input terminal of the voltage conversion circuit through the voltage conversion module. The bypass module is connected in parallel with the voltage conversion module. The output terminal of the voltage conversion circuit is connected to a load. The control circuit is used to execute the method described in any one of the above embodiments. Thirdly, embodiments of this application provide an energy storage device, including an input interface, a memory, and a processor. The input interface of the energy storage device is connected to a power supply system. The power supply system includes a voltage conversion circuit and several parallel input circuits. Each input circuit includes a maximum power point tracking (MPPT) module, a voltage conversion module, and a bypass module. The input terminal of the MPPT module is used to connect to an input power source. The output terminal of the MPPT module is connected to the input terminal of the voltage conversion circuit through the voltage conversion module. The bypass module is connected in parallel with the voltage conversion module. The output terminal of the voltage conversion circuit is connected to a load. The energy storage device is used to interact with the power supply system through the input interface and to receive the output voltage of the power supply system through the input interface. The memory is used to store a computer program. The processor is used to execute the method as described in the first aspect or any embodiment of the first aspect when the computer program is invoked.

[0015] Fourthly, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described in the first aspect or any embodiment of the first aspect.

[0016] The power supply scheme provided in this application embodiment is applied to a power supply system. The power supply system includes a voltage conversion circuit and several parallel input circuits. Each input circuit includes a maximum power point tracking (MPPT) module, a voltage conversion module, and a bypass module. The input terminal of the MPPT module is used to connect to the input power supply. The output terminal of the MPPT module is connected to the input terminal of the voltage conversion circuit through the voltage conversion module. The bypass module is connected in parallel with the voltage conversion module. The output terminal of the voltage conversion circuit is connected to the load. This scheme obtains the maximum output power and its corresponding output voltage of each input power source through the MPPT module; determines the first input circuit (i.e., the input circuit containing the maximum value among the maximum output powers) and the first voltage (i.e., the output voltage corresponding to the maximum output power of the first input circuit) based on each maximum output power; controls the first input circuit to output the first voltage and controls the bypass module of the first input circuit to work to bypass the voltage conversion module of the first input circuit; controls the voltage conversion modules of other input circuits to convert the voltage output by the MPPT module to output the first voltage to the voltage conversion circuit; and controls the voltage conversion circuit to convert the first voltage to output the required voltage according to the load's voltage demand. In the above scheme, by tracking the maximum output power of each input power source, each input power source can operate at its maximum power, thereby improving the power supply efficiency of the power supply system; and by bypassing the voltage conversion module of the first input circuit, that is, by not operating the voltage conversion module of the first input circuit, the power consumption of the power supply system can be reduced. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the circuit structure of a power supply system provided in an embodiment of this application; Figure 2 A schematic flowchart illustrating a power supply method provided in an embodiment of this application; Figure 3 This is another schematic flowchart of a power supply method provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a power supply device provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of an energy storage device provided in an embodiment of this application. Detailed Implementation

[0018] With the continuous advancement of new energy technologies, new energy sources such as solar and wind power are becoming increasingly popular due to their advantages of being clean, environmentally friendly, and renewable.

[0019] Due to the instability of new energy sources such as solar and wind power, multiple input sources are usually used to supply power. In scenarios where multiple photovoltaic and wind turbines are used to supply power, the photovoltaic and wind turbines are usually connected in parallel or in a complementary manner (i.e., photovoltaic power is used during the day and wind turbine power is used at night).

[0020] However, direct parallel connection of photovoltaic and wind turbines makes it difficult for multiple input sources to operate at their maximum power point simultaneously. In the complementary approach of photovoltaic and wind turbines, wind turbines are often idle or not utilized at their maximum power during the day, resulting in energy waste.

[0021] In view of this, embodiments of this application provide a power supply control method to improve the power supply efficiency of a multi-input source power supply system.

[0022] The power supply control method provided in this application embodiment can be applied to power supply system 100. Figure 1 A schematic diagram of the circuit structure of the power supply system 100 provided in the embodiments of this application is shown below. Figure 1 As shown, the power supply system 100 provided in this application embodiment may include a voltage conversion circuit 101, a control circuit 102, and several parallel input circuits 103.

[0023] Each input circuit 103 may include a maximum power point tracking module (MPPT), a voltage conversion module, and a bypass module.

[0024] The input terminal of the maximum power point tracking (MPPT) module is connected to the input power supply, and the output terminal of the MPPT module is connected to the input terminal of the voltage conversion circuit 101 via a voltage conversion module. The MPPT module is used to track the maximum output power of the corresponding input power supply. This input power supply can be a photovoltaic panel, a wind turbine, etc.

[0025] The bypass module is connected in parallel with the voltage conversion module. The bypass module may include a switching transistor to bypass the corresponding voltage conversion module. The voltage conversion module may include a DC / DC converter to convert the electrical energy output from the input power supply after maximum power point tracking to meet output requirements.

[0026] The output terminal of the voltage conversion circuit 101 is connected to the load. The voltage conversion circuit 101 may include a boost circuit, a buck circuit, or a boost / buck circuit; in this embodiment, the following description will exemplify the voltage conversion circuit 101 including a boost / buck circuit. The voltage conversion circuit 101 is used to output a corresponding voltage according to the power demand of the load. The load may include a battery, electrical equipment, etc. Electrical equipment may include a hair dryer, induction cooker, water heater, etc.

[0027] The voltage conversion circuit 101 may include multiple voltage conversion circuits, and each voltage conversion circuit 101 can be electrically connected to the output terminal of the corresponding voltage conversion module. To reduce costs, the voltage conversion circuit 101 may also include only one voltage conversion circuit. In this case, the voltage conversion circuit 101 is electrically connected to the output terminal of each voltage conversion module. In this embodiment, the following description will be based on the example of only one voltage conversion circuit 101.

[0028] The control circuit 102 can be electrically connected to each maximum power point tracking module (MPPT), each voltage conversion module, each bypass module, and the voltage conversion circuit 101, respectively. The control circuit 102 is used to control the above modules and circuits to perform the power supply method provided in the embodiments of this application.

[0029] Figure 2 This is a schematic flowchart of a power supply method provided in an embodiment of this application, as shown below. Figure 2 As shown, the power supply method provided in this application embodiment may include the following steps: S110: Obtain the maximum output power and corresponding output voltage of each input power supply through the maximum power point tracking module.

[0030] Due to environmental factors and differences in the model and aging of each input power supply, the maximum output power of different input power supplies at the same time will usually vary, and the maximum output power of the same input power supply may also vary at different times. Therefore, a maximum power point tracking (MPPT) module can be used to periodically collect the maximum output power of each input power supply and the corresponding output voltage. Specifically, at each sampling time, the control circuit 102 controls the MPPT module to perform maximum power point tracking on the connected input power supply to obtain the maximum output power of each input power supply and the corresponding output voltage.

[0031] S120. Determine the first input circuit and the first voltage based on the maximum output power.

[0032] Specifically, the input circuit containing the maximum value among the maximum output power of each input power source can be defined as the first input circuit, and the voltage corresponding to the maximum value among the maximum output power of each input power source (i.e., the output voltage corresponding to the maximum output power of the first input circuit) can be defined as the first voltage.

[0033] It is understandable that if multiple maximum output powers are equal among the maximum output powers of each input power source, then the input circuits containing these multiple maximum output powers are all the first input circuits.

[0034] Furthermore, due to environmental factors (such as sunlight and wind speed), the maximum output power of each input power source typically varies in each sampling period. Therefore, the maximum value of the maximum output power of each input power source will also differ in each sampling period; that is, the first voltage may be different in different sampling periods. Additionally, it is possible that the maximum output power of the input power source corresponding to input circuit A in the previous sampling period is the maximum value among all input power sources, while the maximum output power of the input power source corresponding to input circuit B in the next sampling period is also the maximum value among all input power sources. In other words, the first input circuit may also be different in different sampling periods.

[0035] S130. Control the first input circuit to output a first voltage and control the bypass module of the first input circuit to work to bypass the voltage conversion module of the first input circuit, and control the voltage conversion modules of other input circuits to convert the voltage output by the maximum power point tracking module to output the first voltage to the voltage conversion circuit.

[0036] Since the output voltage of the first input circuit is the first voltage, meaning the first input circuit directly outputs the first voltage without needing a voltage conversion module to convert its output voltage to the first voltage, the voltage conversion module of the first input circuit can be disabled to reduce power consumption. Specifically, a bypass signal can be output to the bypass module of the first input circuit, thus bypassing the voltage conversion module of the first input circuit, making it inoperable. In this application, the bypass module bypasses the voltage conversion module, meaning the bypass module directly connects the maximum power point tracking module and the voltage conversion circuit in its branch, and the voltage output by the maximum power point tracking module is directly output to the voltage conversion circuit through the bypass module. The bypass module includes at least one switching transistor.

[0037] Since the output voltage of other input circuits is not equal to the first voltage, the voltage conversion module of other input circuits can be controlled to convert the output voltage of other input circuits to output the first voltage.

[0038] Specifically, based on the output voltage of each other input circuit and the first voltage, the first control signal of the voltage conversion module in each other input circuit can be determined, and then the first control signal can be sent to the voltage conversion module so that the voltage conversion module converts the output voltage of the maximum power point tracking module into the first voltage. The first control signal is used to control the switching frequency and duty cycle of the switching transistor in the voltage conversion module.

[0039] Since the output voltages of the other input circuits are usually different, the voltage values ​​that need to be adjusted when converting the output voltages of the other input circuits to the first voltage are also different, and the corresponding first control signals for the other input circuits are also different. For example, the first voltage is 50V, and the other input circuits include a first input circuit, a second input circuit, and a third input circuit. The output voltage of the first input circuit is 40V, the output voltage of the second input circuit is 45V, and the output voltage of the third input circuit is 47V. Therefore, the output voltage of the first input circuit needs to be boosted by 10V, the output voltage of the second input circuit needs to be boosted by 5V, and the output voltage of the third input circuit needs to be boosted by 3V. That is, the voltage values ​​that need to be adjusted for the first, second, and third input circuits are all different. Therefore, different first control signals need to be sent to the voltage conversion modules of the first, second, and third input circuits respectively, so that the first, second, and third input circuits can all output a first voltage of 50V after conversion by their respective voltage conversion modules.

[0040] S140. Based on the load's required voltage, control the voltage conversion circuit to convert the first voltage to output the required voltage.

[0041] Specifically, a second control signal can be determined based on the load's required voltage and the first voltage, and then the second control signal is sent to the voltage conversion circuit 101 so that the voltage conversion circuit 101 converts the first voltage into the load's required voltage. The second control signal is used to control the switching frequency and duty cycle of the switching transistor in the voltage conversion circuit 101.

[0042] Since the first voltage may differ in each sampling period, meaning that the voltage value to be converted when converting the first voltage to the load's required voltage may be different in each sampling period, the second control signal determined based on the load's required voltage and the first voltage may also be different in each sampling period.

[0043] It is understandable that after the previous sampling time ends and each input circuit starts working, the control circuit 102 can start timing (each timing can start from zero). The control circuit 102 can obtain timing information, and when the timing information reaches the preset time information (that is, when the next sampling time is reached), it returns to execute the above step S110.

[0044] The power supply method provided in this application is applied to a power supply system. The power supply system includes a voltage conversion circuit and several parallel input circuits. Each input circuit includes a maximum power point tracking (MPPT) module, a voltage conversion module, and a bypass module. The input terminal of the MPPT module is connected to the input power supply. The output terminal of the MPPT module is connected to the input terminal of the voltage conversion circuit through the voltage conversion module. The bypass module is connected in parallel with the voltage conversion module. The output terminal of the voltage conversion circuit is connected to the load. This scheme obtains the maximum output power and corresponding output voltage of each input power source through the MPPT module. Based on each maximum output power, it determines a first input circuit (i.e., the input circuit containing the maximum value among the maximum output powers) and a first voltage (i.e., the output voltage corresponding to the maximum output power of the first input circuit). It controls the first input circuit to output the first voltage and controls the bypass module of the first input circuit to work to bypass the voltage conversion module of the first input circuit. It also controls the voltage conversion modules of other input circuits to convert the voltage output by the MPPT module to output the first voltage to the voltage conversion circuit. Based on the load's required voltage, it controls the voltage conversion circuit to convert the first voltage to output the required voltage. In the above technical solution, by tracking the maximum output power of each input power source, each input power source can operate at its maximum power, thereby improving the power supply efficiency of the power supply system; and by bypassing the voltage conversion module of the first input circuit, that is, by not operating the voltage conversion module of the first input circuit, the power consumption of the power supply system can be reduced.

[0045] Figure 3 This is another schematic diagram of the power supply method provided in an embodiment of this application, as shown below. Figure 3 As shown, the method may include the following steps: S210: Obtain the maximum output power and corresponding output voltage of each input power supply through the maximum power point tracking module.

[0046] S220. Determine the first input circuit and the first voltage based on the maximum output power.

[0047] S230. Control the first input circuit to output a first voltage and control the bypass module of the first input circuit to work so as to bypass the voltage conversion module of the first input circuit, and control the voltage conversion modules of other input circuits to convert the voltage output by the maximum power point tracking module to output the first voltage to the voltage conversion circuit.

[0048] S240. Based on the load's required voltage, control the voltage conversion circuit to convert the first voltage to output the required voltage.

[0049] Steps S210 to S240 can be referred to the above. Figure 2 The descriptions of steps S110 to S140 in the illustrated embodiments will not be repeated here.

[0050] S250. When the load's required voltage changes, the first voltage is converted according to the changed required voltage and the first voltage control voltage conversion circuit to output the changed required voltage.

[0051] Since the required voltage of the same load may vary at different times (for example, different speed settings of a hair dryer correspond to different required voltages), to improve the accuracy of the voltage output by the power supply system 100 to the load, the required voltage of the load can be determined once in each sampling cycle. Specifically, after tracking the maximum output power of each input power source in each sampling cycle, the required voltage of the load can be determined once. When the required voltage of the load changes, the voltage conversion circuit 101 can be controlled to convert the first voltage to output the changed required voltage. In some embodiments, the required voltage of the load can also be monitored in real time, and when the required voltage of the load changes, the voltage conversion circuit 101 can be controlled to convert the first voltage to output the required voltage of the load.

[0052] Understandably, to further improve the accuracy of the output voltage of the power supply system 100, the load demand voltage can also be determined once at a set time interval in each sampling cycle, that is, the load demand voltage can be determined multiple times in one sampling cycle.

[0053] In some embodiments, after step S240, the following may also be included: When the load connected to the output terminal of the voltage conversion circuit 101 changes, the required voltage of the changed load is obtained, and the voltage conversion circuit 101 is controlled to convert the first voltage to output the required voltage of the changed load.

[0054] The power supply system 100 may be connected to different loads at different times, and the required voltages of different loads are usually different. Therefore, the load connected to the output terminal of the voltage conversion circuit 101 can be detected during the sampling period to determine whether the connected load has changed. If the load connected to the output terminal of the voltage conversion circuit 101 has changed, the required voltage of the changed load can be obtained, and then the voltage conversion circuit 101 can be controlled to convert the first voltage to the required voltage of the changed load. For example, if the first load connected to the voltage conversion circuit 101 at the previous moment becomes the second load, then the voltage conversion circuit 101 needs to be controlled to convert the first voltage to the required voltage of the second load again according to the required voltage of the second load.

[0055] In each sampling cycle, the load connected to the output terminal of the voltage conversion circuit 101 can be detected once or multiple times to improve the accuracy of the output voltage of the power supply system 100.

[0056] As an optional approach in this application, when a change in the load connected to the output terminal of the voltage conversion circuit 101 is detected, the process can directly return to the execution of step S210 described above.

[0057] Based on the same inventive concept, as an implementation of the above method, this application provides a power supply device. This device embodiment corresponds to the aforementioned method embodiment. For ease of reading, this device embodiment will not repeat the details of the aforementioned method embodiment one by one, but it should be clear that the device in this embodiment can correspondingly implement all the contents of the aforementioned method embodiment.

[0058] Figure 4 This is a schematic diagram of the power supply device provided in the embodiments of this application, such as... Figure 4 As shown, the power supply device provided in this embodiment may include: an acquisition module 11, a determination module 12, and a control module 13, wherein: The acquisition module 11 is used to: acquire the maximum output power of each input power supply and its corresponding output voltage through the maximum power tracking module; The determining module 12 is used to: determine a first input circuit and a first voltage based on each of the maximum output powers, wherein the first input circuit is the input circuit where the maximum value of each of the maximum output powers is located, and the first voltage is the output voltage corresponding to the maximum output power of the first input circuit; The control module 13 is used to: control the first input circuit to output the first voltage and control the bypass module of the first input circuit to work to bypass the voltage conversion module of the first input circuit, and control the voltage conversion modules of other input circuits to convert the voltage output by the maximum power point tracking module to output the first voltage to the voltage conversion circuit 101; Based on the required voltage of the load, the voltage conversion circuit 101 is controlled to convert the first voltage to output the required voltage.

[0059] As an optional implementation, the control module 13 is specifically used for: A bypass signal is output to the bypass module of the first input circuit. The bypass signal is used to instruct the bypass module to turn on the connection between the maximum power point tracking module and the voltage conversion circuit, so as to bypass the voltage conversion module of the first input circuit.

[0060] As an optional implementation, the control module 13 is specifically used for: The maximum power tracking modules of each of the other input circuits are controlled to operate at their respective maximum power tracking points; Based on the output voltage of the maximum power tracking module of each input circuit and the first voltage, a first control signal for the voltage conversion module in each input circuit is determined. The first control signal is used to control the switching frequency and duty cycle of the switching transistor in the voltage conversion module. The first control signal is sent to the voltage conversion module so that the voltage conversion module converts the voltage output by the maximum power tracking module of the other input circuit into the first voltage and outputs it to the voltage conversion circuit 101.

[0061] As an optional implementation, the control module 13 is specifically used for: A second control signal is determined based on the required voltage and the first voltage. The second control signal is used to control the switching frequency and duty cycle of the switching transistor in the voltage conversion circuit 101. The second control signal is sent to the voltage conversion circuit 101 so that the voltage conversion circuit 101 converts the first voltage into the required voltage.

[0062] As an optional implementation, the acquisition module 11 is further configured to: Obtain timing information, and when the timing information reaches the preset time information, return to execute the step of obtaining the maximum output power and corresponding output voltage of each input power supply through the maximum power tracking module.

[0063] As an optional implementation, the control module 13 is further configured to: When the load's required voltage changes, the voltage conversion circuit 101 is controlled to convert the first voltage according to the changed required voltage and the first voltage to output the changed required voltage.

[0064] As an optional implementation, the acquisition module 11 is further configured to: When the load connected to the output terminal of the voltage conversion circuit 101 changes, the required voltage of the changed load is obtained; The control module 13 is further configured to: control the voltage conversion circuit 101 to convert the first voltage according to the changed load demand voltage and the first voltage to output the changed load demand voltage.

[0065] As an optional implementation, the acquisition module 11 is further configured to: When the load connected to the output terminal of the voltage conversion circuit 101 changes, the process returns to the step of obtaining the maximum output power of each input power source and its corresponding output voltage through the maximum power tracking module.

[0066] The power supply device provided in this embodiment can execute the above method embodiment, and its implementation principle and technical effect are similar, so it will not be described again here.

[0067] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0068] Based on the same inventive concept, embodiments of this application also provide an energy storage device. Figure 5 This is a schematic diagram of the structure of the energy storage device provided in the embodiments of this application, such as... Figure 5 As shown, the energy storage device provided in this embodiment may include: an input interface 210, a memory 220, and a processor 230. The input interface 210 is connected to the power supply system, and the energy storage device is used to interact with the power supply system through the input interface 210 and receive the output voltage of the power supply system through the input interface 210. The memory 220 is used to store computer programs; the processor 230 is used to execute the methods described in the above method embodiment when the computer program is invoked.

[0069] The energy storage device provided in this embodiment can execute the above method embodiment, and its implementation principle and technical effect are similar, so it will not be described again here.

[0070] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the methods described in the above-described method embodiments.

[0071] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially as a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, or magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)).

[0072] Those skilled in the art will understand that implementing all or part of the processes in the above embodiments can be accomplished by a computer program instructing related hardware. This program can be stored in a computer-readable storage medium, and when executed, it can include the processes described in the above method embodiments. The aforementioned storage medium can include various media capable of storing program code, such as ROM or random access memory (RAM), magnetic disks, or optical disks.

[0073] The naming or numbering of steps in this application does not mean that the steps in the method flow must be executed in the time / logical order indicated by the naming or numbering. The execution order of the named or numbered process steps can be changed according to the technical purpose to be achieved, as long as the same or similar technical effect can be achieved.

[0074] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0075] In the embodiments provided in this application, it should be understood that the disclosed apparatus / devices and methods can be implemented in other ways. For example, the apparatus / device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0076] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0077] In the description of this application, unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship. For example, A / B can mean A or B. "And / or" in this application is merely a description of the relationship between the related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. A and B can be singular or plural.

[0078] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0079] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0080] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein.

[0081] References described in this application, such as "one embodiment" or "some embodiments," mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A power supply method characterized by, This invention is applied to a power supply system, which includes a voltage conversion circuit and several parallel input circuits. Each input circuit includes a maximum power point tracking (MPPT) module, a voltage conversion module, and a bypass module. The input terminal of the MPPT module is connected to an input power source, and the output terminal of the MPPT module is connected to the input terminal of the voltage conversion circuit through the voltage conversion module. The bypass module is connected in parallel with the voltage conversion module, and the output terminal of the voltage conversion circuit is connected to a load. The power supply method includes: The maximum output power and its corresponding output voltage of each input power source are obtained through the maximum power tracking module. The first input circuit and the first voltage are determined based on the maximum output power of each of the aforementioned maximum output powers. The first input circuit is the input circuit where the maximum value of each of the aforementioned maximum output powers is located, and the first voltage is the output voltage corresponding to the maximum output power of the first input circuit. The system controls the first input circuit to output the first voltage and controls the bypass module of the first input circuit to work so as to bypass the voltage conversion module of the first input circuit. It also controls the voltage conversion modules of other input circuits to convert the voltage output by the maximum power point tracking module so as to output the first voltage to the voltage conversion circuit. Based on the required voltage of the load, the voltage conversion circuit is controlled to convert the first voltage to output the required voltage.

2. The method of claim 1, wherein, The operation of the bypass module controlling the first input circuit to bypass the voltage conversion module of the first input circuit includes: A bypass signal is output to the bypass module of the first input circuit. The bypass signal is used to instruct the bypass module to turn on the connection between the maximum power point tracking module and the voltage conversion circuit, so as to bypass the voltage conversion module of the first input circuit.

3. The method of claim 1, wherein, The voltage conversion module that controls other input circuits converts the voltage output by the maximum power point tracking module to output the first voltage to the voltage conversion circuit, including: The maximum power tracking modules of each of the other input circuits are controlled to operate at their respective maximum power tracking points; Based on the output voltage of the maximum power tracking module of each of the other input circuits and the first voltage, a first control signal for the voltage conversion module in each of the other input circuits is determined. The first control signal is used to control the switching frequency and duty cycle of the switching transistor in the voltage conversion module. The first control signal is sent to the voltage conversion module so that the voltage conversion module converts the voltage output by the maximum power tracking module of the other input circuit into the first voltage and outputs it to the voltage conversion circuit.

4. The method of claim 1, wherein, The control of the voltage conversion circuit to convert the first voltage to output the required voltage includes: A second control signal is determined based on the required voltage and the first voltage. The second control signal is used to control the switching frequency and duty cycle of the switching transistor in the voltage conversion circuit. The second control signal is sent to the voltage conversion circuit so that the voltage conversion circuit converts the first voltage into the required voltage.

5. The method of claim 1, wherein, The method further includes: Obtain timing information, and when the timing information reaches the preset time information, return to execute the step of obtaining the maximum output power and corresponding output voltage of each input power supply through the maximum power tracking module.

6. The method of claim 1, wherein, The method further includes: When the load's required voltage changes, the voltage conversion circuit is controlled to convert the first voltage according to the changed required voltage and the first voltage to output the changed required voltage.

7. The method according to any one of claims 1 to 6, characterized in that, The method further includes: When the load connected to the output terminal of the voltage conversion circuit changes, the required voltage of the changed load is obtained, and the voltage conversion circuit is controlled to convert the first voltage according to the required voltage of the changed load and the first voltage to output the required voltage of the changed load.

8. The method according to any one of claims 1 to 6, characterized in that, The method further includes: When the load connected to the output of the voltage conversion circuit changes, the process returns to the step of obtaining the maximum output power and corresponding output voltage of each input power source through the maximum power tracking module.

9. A power supply system characterized by comprising: The power supply system includes a voltage conversion circuit, a control circuit, and several parallel input circuits. Each input circuit includes a maximum power point tracking (MPPT) module, a voltage conversion module, and a bypass module. The input terminal of the MPPT module is connected to an input power source. The output terminal of the MPPT module is connected to the input terminal of the voltage conversion circuit through the voltage conversion module. The bypass module is connected in parallel with the voltage conversion module. The output terminal of the voltage conversion circuit is connected to a load. The control circuit is used to execute the method described in any one of claims 1 to 8.

10. An energy storage device, characterized by, The energy storage device includes an input interface, a memory, and a processor. The input interface of the energy storage device is connected to a power supply system. The power supply system includes a voltage conversion circuit and several parallel input circuits. Each input circuit includes a maximum power point tracking (MPPT) module, a voltage conversion module, and a bypass module. The input terminal of the MPPT module is used to connect to an input power source. The output terminal of the MPPT module is connected to the input terminal of the voltage conversion circuit through the voltage conversion module. The bypass module is connected in parallel with the voltage conversion module. The output terminal of the voltage conversion circuit is connected to a load. The energy storage device is used to interact with the power supply system through the input interface and to receive the output voltage of the power supply system through the input interface. The memory is used to store a computer program. The processor is used to execute the method as described in any one of claims 1-8 when the computer program is invoked.

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