Control method, system and device of voltage converter

Abstract

The invention discloses a control method, system and device of a voltage converter. The method comprises the following steps: acquiring an initial input voltage of the voltage converter and a target output voltage to be converted from the initial input voltage; determining a modulation wave of the voltage converter at least based on the initial input voltage and the target output voltage; determining a pulse width modulation signal corresponding to a switch tube based on the modulation wave and a carrier wave corresponding to the switch tube in the voltage converter; and based on the pulse width modulation signal, controlling a switch tube to perform pulse width modulation on the initial input voltage so as to convert the initial input voltage into the target output voltage. The technical problem of low flexibility of voltage conversion is solved.

Description

Technical Field

[0001] The present invention relates to the field of energy storage, and in particular, to a control method, system and device for a voltage converter. Background Art

[0002] Currently, in the field of outdoor portable energy storage, due to the large number of specifications of photovoltaic panels used outdoors and the wide voltage range of photovoltaic panels. During the charging process of the battery, the open-circuit voltage of the photovoltaic panel used by the user may exceed the voltage of the battery or be lower than the voltage of the battery. In order to more widely adapt to the relationship between the photovoltaic panel and the battery, a direct current to direct current (DCDC) circuit is often used, which requires two duty cycle parameters to boost (Boost) / buck (Buck) respectively, and also requires a state parameter to indicate the working state, resulting in inflexibility in voltage conversion, and thus there is a technical problem of low flexibility in voltage conversion.

[0003] In view of the above technical problem of low flexibility in voltage conversion, no effective solution has been proposed yet. Summary of the Invention

[0004] Embodiments of the present invention provide a control method, system and device for a voltage converter to at least solve the technical problem of low flexibility in voltage conversion.

[0005] According to one aspect of the embodiments of the present invention, a control method for a voltage converter is provided. The method may include: obtaining an initial input voltage of the voltage converter and a target output voltage to which the initial input voltage is to be converted; determining a modulation wave of the voltage converter based on at least the initial input voltage and the target output voltage; determining a pulse width modulation signal corresponding to the switching tube based on the modulation wave and a carrier wave corresponding to the switching tube in the voltage converter; and controlling the switching tube to perform pulse width modulation on the initial input voltage based on the pulse width modulation signal to convert the initial input voltage to the target output voltage.

[0006] According to one aspect of the embodiments of the present invention, a control system for a voltage converter is further provided. The system may include: a signal generation end for determining a modulation wave of the voltage converter based on at least the initial input voltage and the target output voltage to which the initial input voltage is to be converted, and determining a pulse width modulation signal corresponding to the switching tube based on the modulation wave and a carrier wave corresponding to the switching tube; and a switching tube for performing pulse width modulation on the initial input voltage based on the pulse width modulation signal to convert the initial input voltage to the target output voltage.

[0007] According to one aspect of an embodiment of the present invention, there is also provided a control system for another voltage converter. The system may include: a controller configured to control a power generation device to output an initial input voltage of the voltage converter; a voltage converter configured to determine a modulation wave based at least on the initial input voltage and a target output voltage to which the initial input voltage is to be converted, determine a pulse width modulation signal corresponding to a switching tube based on the modulation wave and a carrier wave corresponding to the switching tube, and control the switching tube to perform pulse width modulation on the initial input voltage based on the pulse width modulation signal so as to convert the initial input voltage to the target output voltage, wherein the switching tube is disposed in the voltage converter; an energy consumption system configured to receive the target output voltage and convert the target output voltage into target energy.

[0008] According to one aspect of an embodiment of the present invention, there is also provided a control device for a voltage converter. The device may include: an acquisition unit configured to acquire an initial input voltage of the voltage converter and a target output voltage to which the initial input voltage is to be converted; a first determination unit configured to determine a modulation wave of the voltage converter based at least on the initial input voltage and the target output voltage; a second determination unit configured to determine a pulse width modulation signal corresponding to a switching tube based on the modulation wave and a carrier wave corresponding to the switching tube in the voltage converter; and a control unit configured to control the switching tube to perform pulse width modulation on the initial input voltage based on the pulse width modulation signal so as to convert the initial input voltage to the target output voltage.

[0009] According to one aspect of an embodiment of the present invention, there is also provided a computer-readable storage medium. The computer-readable storage medium includes a stored program, wherein when the program runs, it controls a device where the storage medium is located to execute the control method of the voltage converter according to the embodiment of the present invention.

[0010] According to one aspect of an embodiment of the present invention, there is also provided a processor. The processor is configured to run a program, wherein when the program runs on the processor, it executes the control method of the voltage converter according to the embodiment of the present invention.

[0011] In the embodiments of the present application, the initial input voltage of the voltage converter and the target output voltage to which the initial input voltage is to be converted are obtained. By comparing the initial input voltage with the target output voltage, the comparison result between the two voltages can be obtained. According to the comparison result, the modulation wave of the voltage converter can be determined. Then, based on the modulation wave of the voltage converter and the carrier wave corresponding to the switching tubes in the voltage converter, the pulse width modulation signals corresponding to the respective switching tubes can be determined. Further, according to the pulse width modulation signals corresponding to the respective switching tubes, the corresponding switching tubes can be controlled respectively to perform pulse width modulation on the initial input voltage thereon, so as to convert the initial input voltage thereon to the target output voltage, achieving the purpose of boosting and bucking the initial voltage through Pulse Width Modulation (PWM) signals, thereby solving the technical problem of low flexibility of voltage conversion, and further achieving the technical effect of improving the flexibility of voltage conversion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0013] Figure 1 is a system block diagram of a method for implementing the control of a voltage converter according to an embodiment of the present invention;

[0014] Figure 2 is a flowchart of a method for controlling a voltage converter according to an embodiment of the present invention;

[0015] FIG. 3(a) is a schematic diagram of the main topology of a control circuit of a voltage converter according to an embodiment of the present invention;

[0016] FIG. 3(b) is a schematic diagram of the secondary topology of a control circuit of a voltage converter according to an embodiment of the present invention;

[0017] FIG. 4(a) is a schematic diagram of a signal with a symmetric triangular wave as the carrier wave according to an embodiment of the present invention;

[0018] FIG. 4(b) is a schematic diagram of a signal with an asymmetric triangular wave as the carrier wave according to an embodiment of the present invention;

[0019] FIG. 4(c) is a schematic diagram of a signal with a sawtooth wave as the carrier wave according to an embodiment of the present invention;

[0020] FIG. 4(d) is a schematic diagram of a signal with a sine wave as the carrier wave according to an embodiment of the present invention;

[0021] Figure 5 is a schematic diagram of a control system of a voltage converter according to an embodiment of the present invention;

[0022] Figure 6 is a schematic diagram of a control system of another voltage converter according to an embodiment of the present invention;

[0023] FIG. 7(a) is a schematic diagram of a relationship between voltage and current according to the related art;

[0024] FIG. 7(b) is a schematic diagram of a relationship between voltage and power according to the related art;

[0025] Figure 8 is a flowchart of a method for measuring voltage and current according to the related art;

[0026] Figure 9 is a schematic diagram of a control device of a voltage converter according to an embodiment of the present invention. Detailed implementation manners

[0027] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] The control method embodiment of the voltage converter provided by the embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Figure 1 shows a hardware structure block diagram of a computer terminal (or electronic device) for implementing the control method of the voltage converter. As Figure 1As shown, the computer terminal 10 (or electronic device 10) may include one or more processors (shown as 102a, 102b, ……, 102n in the figure) (the processor may include, but is not limited to, a processing device such as a microprocessor (abbreviated as MCU) or a field-programmable gate array (abbreviated as FPGA)), a memory 104 for storing data, and a transmission module 106 for communication functions. In addition, it may further include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the I / O interface), a network interface, a power supply, and / or a camera. Those of ordinary skill in the art can understand that Figure 1 the structure shown is only schematic and does not limit the structure of the above-mentioned electronic device. For example, the computer terminal 10 may further include more or fewer components than Figure 1 shown in, or have a different configuration from Figure 1 that shown.

[0030] It should be noted that the above one or more processors and / or other data processing circuits are generally referred to as "data processing circuits" in this article. The data processing circuit may be embodied in software, hardware, firmware, or any combination thereof, in whole or in part. In addition, the data processing circuit may be a single independent processing module, or be incorporated in whole or in part into any one of the other elements in the computer terminal 10 (or electronic device). As involved in the embodiments of the present application, the data processing circuit is a kind of processor control (such as the selection of a variable resistor terminal path connected to an interface).

[0031] The memory 104 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the control method of the voltage converter in the embodiments of the present application. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory 104, that is, implements the display control method of the above-mentioned display screen. The memory 104 may include a high-speed random access memory, and may further include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some instances, the memory 104 may further include a memory remotely set relative to the processor, and these remote memories may be connected to the computer terminal 10 through a network. Examples of the above network include, but are not limited to, the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0032] The transmission module 106 is used to receive or send data via a network. Specific examples of the above-mentioned network may include a wireless network provided by the communication provider of the computer terminal 10. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, abbreviated as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a Radio Frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0033] The display can be, for example, a touch-screen Liquid Crystal Display (LCD), which enables the user to interact with the user interface of the computer terminal 10 (or electronic device).

[0034] It should be noted here that in some alternative embodiments, the above Figure 1 illustrated computer device (or electronic device) may include hardware elements (including circuits), software elements (including computer code stored on a computer-readable medium), or a combination of both hardware elements and software elements. It should be pointed out that Figure 1 is only an example of a specific specific instance and is intended to illustrate the types of components that may exist in the above computer device (or electronic device).

[0035] Under the above operating environment, an embodiment of a control method for a voltage converter is provided in an embodiment of the present application. It should be noted that the steps illustrated in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is illustrated in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0036] Figure 2 is a flowchart of a control method for a voltage converter according to an embodiment of the present invention. As Figure 2 shown, the method may include the following steps:

[0037] Step S202, obtain the initial input voltage of the voltage converter and the target output voltage to which the initial input voltage is to be converted.

[0038] In the technical solution provided in step S202 of the present invention above, the above voltage converter can be used to convert the voltage output by the power generation device. The above initial input voltage can be used to represent the input voltage output by the power generation device to the voltage converter during actual use. The above target output voltage can be used to represent the output voltage after the voltage converter converts the input voltage during actual use. For example, the above voltage converter can be a DCDC converter. The above initial input voltage can be called the input voltage during actual use. The above target output voltage can be called the output voltage during actual use. The above power generation device can be a photovoltaic panel, which is not specifically limited here and is only for illustrative purposes.

[0039] In this embodiment, the initial input voltage of the voltage converter and the target output voltage to which the initial input voltage is to be converted are obtained. For example, the initial input voltage is output to the voltage converter by the power generation device. After the voltage converter receives the initial input voltage, the working voltage required by the battery management system is determined, that is, the target output voltage to which the initial input voltage is to be converted is determined. This is not specifically limited here and is only for illustrative purposes.

[0040] Step S204, determine the modulation wave of the voltage converter based on at least the initial input voltage and the target output voltage.

[0041] In the technical solution provided in step S204 of the present invention above, the modulation wave of the above voltage converter can be used to represent the modulation signal of the voltage converter.

[0042] In this embodiment, after obtaining the initial input voltage of the voltage converter and the target output voltage to which the initial input voltage is to be converted, the modulation wave of the voltage converter is determined based on at least the initial input voltage and the target output voltage. For example, by comparing the initial input voltage with the target output voltage, the comparison result between the two voltages can be obtained. According to the comparison result, the modulation wave of the voltage converter can be determined. This is not specifically limited here and is only for illustrative purposes.

[0043] Optionally, according to the comparison result, the modulation wave of the voltage converter can be determined. For example, by analyzing the comparison result, the modulation wave of the voltage converter can be determined according to the center point of the carrier amplitude. Among them, the comparison result can be used to represent the relationship between the initial input voltage and the target output voltage. For example, the comparison result can be that the initial input voltage is equal to the target output voltage, the comparison result can also be that the initial input voltage is less than the target output voltage, and the comparison result can also be that the initial input voltage is greater than the target output voltage. The center point of the carrier amplitude can be 0.5. This is not specifically limited here and is only for illustrative purposes.

[0044] Step S206: Determine the pulse width modulation signal corresponding to the switching tube based on the modulation wave and the carrier wave corresponding to the switching tube in the voltage converter.

[0045] In the technical solution provided in step S206 of the present invention above, the above-mentioned pulse width modulation signal can be used to perform pulse width modulation on the initial input voltage.

[0046] In this embodiment, after determining the modulation wave of the voltage converter based on at least the initial input voltage and the target output voltage, determine the pulse width modulation signal corresponding to the switching tube based on the modulation wave and the carrier wave corresponding to the switching tube in the voltage converter. For example, according to the modulation wave and the carrier waves corresponding to the respective switching tubes in the voltage converter, the pulse width modulation signals corresponding to the respective switching tubes can be determined. Among them, the pulse width modulation signal can at least include: the first pulse width modulation signal, the second pulse width modulation signal, the third pulse width modulation signal, the fourth pulse width modulation signal, etc.

[0047] Optionally, according to the modulation wave and the carrier waves corresponding to the respective switching tubes in the voltage converter, the pulse width modulation signals corresponding to the respective switching tubes can be determined. For example, according to the modulation wave and the carrier waves corresponding to the respective switching tube groups in the voltage converter, the pulse width modulation signals corresponding to the respective switching tubes in each switching tube group can be determined.

[0048] Step S208: Control the switching tube to perform pulse width modulation on the initial input voltage based on the pulse width modulation signal, so as to convert the initial input voltage to the target output voltage.

[0049] In the technical solution provided in step S208 of the present invention above, the operation of controlling the switching tube may include: turning off the switching tube, turning on the switching tube, etc. There is no specific limitation here, only for illustrative purposes.

[0050] Optionally, after determining the pulse width modulation signal corresponding to the switching tube based on the modulation wave and the carrier wave corresponding to the switching tube in the voltage converter, control the switching tube to perform pulse width modulation on the initial input voltage based on the pulse width modulation signal, so as to convert the initial input voltage to the target output voltage. For example, according to the pulse width modulation signals corresponding to the respective switching tubes in each switching tube group, the corresponding switching tubes can be controlled respectively to perform pulse width modulation on the initial input voltage thereon, so as to convert the initial input voltage thereon to the target output voltage. Among them, the switching tube group can at least include: the first switching tube group and the second switching tube group, etc. The first switching tube group can at least include: the first switching tube and the second switching tube, etc. The second switching tube group can at least include: the third switching tube and the fourth switching tube, etc.

[0051] Optionally, according to the pulse width modulation signals corresponding to the switching tubes in each switching tube group, the corresponding switching tubes can be controlled respectively to perform pulse width modulation on the initial input voltage thereon, so as to convert the initial input voltage thereon to the target output voltage. For example, according to the pulse width modulation signals corresponding to the switching tubes in each switching tube group, by controlling the corresponding switching tubes respectively to perform pulse width modulation on the initial input voltage thereon, the output voltages corresponding to the initial input voltages can be obtained. According to the output voltages corresponding to the initial input voltages, the target output voltage can be determined.

[0052] In the solution implemented in the above steps S202 to S208 of the present application, the initial input voltage of the voltage converter and the target output voltage to which the initial input voltage is to be converted are obtained. By comparing the initial input voltage with the target output voltage, the comparison result between the two voltages can be obtained. According to the comparison result, the modulation wave of the voltage converter can be determined, that is, according to the relationship between the initial input voltage and the target output voltage, the modulation wave can be determined. Then, according to the modulation wave of the voltage converter and the carrier wave corresponding to the switching tubes in the voltage converter, the pulse width modulation signals corresponding to the switching tubes can be determined. Then, according to the pulse width modulation signals corresponding to the switching tubes, the corresponding switching tubes can be controlled respectively to perform pulse width modulation on the initial input voltage thereon, so as to convert the initial input voltage thereon to the target output voltage, achieving the purpose of boosting and bucking the initial voltage through the PWM signal, thus solving the technical problem of low flexibility of voltage conversion, and further achieving the technical effect of improving the flexibility of voltage conversion.

[0053] The above method of this embodiment will be further introduced below.

[0054] As an optional implementation manner, step S206, determining the pulse width modulation signal corresponding to the switching tube based on the modulation wave and the carrier wave corresponding to the switching tube in the voltage converter, includes: determining the pulse width modulation signals corresponding to the switching tubes in the switching tube group based on the modulation wave and the carrier wave corresponding to the switching tube group.

[0055] In this embodiment, the switching tube may include at least one switching tube group, and the switching tube group may include multiple switching tubes.

[0056] Optionally, based on the modulation wave and the carrier wave corresponding to the switching tube group, determining the pulse width modulation signals corresponding to the switching tubes in the switching tube group, for example, according to the modulation wave and the carrier waves corresponding to the switching tube groups, the pulse width modulation signals respectively corresponding to the switching tubes in each switching tube group can be determined, that is, the first pulse width modulation signal, the second pulse width modulation signal, the third pulse width modulation signal, and the fourth pulse width modulation signal can be determined, thus achieving the technical effect of being able to determine the pulse width modulation signals corresponding to the switching tubes.

[0057] In this embodiment, it is necessary to determine the specific method of the pulse width modulation signals corresponding to each switching tube. Next, a further introduction will be given on how to determine the pulse width modulation signals corresponding to each switching tube.

[0058] As an alternative embodiment, based on the modulation wave and the carrier corresponding to the switching tube group, determining the pulse width modulation signals corresponding to the switching tubes in the switching tube group includes: based on the modulation wave and the first carrier corresponding to the first switching group, determining the first pulse width modulation signal corresponding to the first switching tube and the second pulse width modulation signal corresponding to the second switching tube; based on the modulation wave and the second carrier corresponding to the second switching group, determining the third pulse width modulation signal corresponding to the third switching tube and the fourth pulse width modulation signal corresponding to the fourth switching tube.

[0059] In this embodiment, at least one switching tube group may include a first switching group and a second switching group. The first switching group may include a first switching tube and a second switching tube, and the second switching group may include a third switching tube and a fourth switching tube. The above-mentioned first pulse width modulation signal and the second pulse width modulation signal may be complementary to each other. The pulse width modulation signal may include the first pulse width modulation signal and the second pulse width modulation signal. The above-mentioned third pulse width modulation signal and the fourth pulse width modulation signal may be complementary to each other. The carrier may include a first carrier and a second carrier. The pulse width modulation signal may include the third pulse width modulation signal and the fourth pulse width modulation signal. There is no specific limitation here, only for illustrative purposes.

[0060] Optionally, in the first switching group, the first switching tube and the second switching tube may form a complementary pair. In the second switching group, the third switching tube and the fourth switching tube may form a complementary pair. The first carrier corresponding to the first switching group may be denoted as carrier 1, and the second carrier corresponding to the second switching group may be denoted as carrier 2.

[0061] Optionally, according to the modulation wave and the first carrier corresponding to the first switching group, the first pulse width modulation signal corresponding to the first switching tube and the second pulse width modulation signal corresponding to the second switching tube can be determined. According to the modulation wave and the second carrier corresponding to the second switching group, the third pulse width modulation signal corresponding to the third switching tube and the fourth pulse width modulation signal corresponding to the fourth switching tube can be determined, thereby achieving the technical effect of being able to determine the pulse width modulation signals corresponding to each switching tube.

[0062] Optionally, according to the modulation form of the modulation wave and the first carrier, the first pulse width modulation signal corresponding to the first switching tube and the second pulse width modulation signal corresponding to the second switching tube can be determined. According to the modulation form of the modulation wave and the second carrier, the third pulse width modulation signal corresponding to the third switching tube and the fourth pulse width modulation signal corresponding to the fourth switching tube can be determined.

[0063] In this embodiment, there is a complementary relationship between the first pulse width modulation signal and the second pulse width modulation signal, and there is a complementary relationship between the third pulse width modulation signal and the fourth pulse width modulation signal. The complementary relationship between the signals will be further introduced below.

[0064] As an alternative implementation, the signal value of the first pulse width modulation signal and the signal value of the second pulse width modulation signal are opposite to each other, and the signal value of the third pulse width modulation signal and the signal value of the fourth pulse width modulation signal are opposite to each other.

[0065] In this embodiment, the signal value of the first pulse width modulation signal and the signal value of the second pulse width modulation signal may be opposite to each other, and the signal value of the third pulse width modulation signal and the signal value of the fourth pulse width modulation signal may be opposite to each other. For example, if the signal value of the first pulse width modulation signal is 1, then the signal value of the second pulse width modulation signal is -1; if the signal value of the third pulse width modulation signal is 1, then the signal value of the fourth pulse width modulation signal is -1. Thus, the technical effect of making the first pulse width modulation signal and the second pulse width modulation signal complementary, and making the third pulse width modulation signal and the fourth pulse width modulation signal complementary is achieved. There is no specific limitation here, and only an example is given for illustration.

[0066] In this embodiment, it is necessary to determine the first pulse width modulation signal corresponding to the first switching tube and the second pulse width modulation signal corresponding to the second switching tube based on the modulation wave and the first carrier wave. The method of determining the first pulse width modulation signal corresponding to the first switching tube and the second pulse width modulation signal corresponding to the second switching tube based on the modulation wave and the first carrier wave will be further introduced below.

[0067] As an alternative implementation, determining the first pulse width modulation signal corresponding to the first switching tube and the second pulse width modulation signal corresponding to the second switching tube based on the modulation wave and the first carrier wave corresponding to the first switching group includes: comparing the modulation wave and the first carrier wave to obtain the first pulse width modulation signal and the second pulse width modulation signal.

[0068] In this embodiment, by comparing the modulation wave and Carrier 1, the first pulse width modulation signal corresponding to the first switching tube and the second pulse width modulation signal corresponding to the second switching tube can be obtained, thus achieving the technical effect of being able to determine the first pulse width modulation signal corresponding to the first switching tube and the second pulse width modulation signal corresponding to the second switching tube based on the modulation wave and the first carrier wave.

[0069] In this embodiment, it is necessary to determine how to obtain the first pulse width modulation signal and the second pulse width modulation signal by comparing the modulation wave and the first carrier wave. The above comparison method will be further introduced below.

[0070] As an alternative embodiment, comparing the modulation wave with the first carrier to obtain a first pulse width modulation signal and a second pulse width modulation signal includes: comparing the modulation wave with the first carrier to obtain a first comparison result; in response to the first comparison result that within at least one first time period, within the first time period of each first time period, the signal value of the modulation wave is greater than or equal to the signal value of the first carrier, determining that the level of the first pulse width modulation signal within the first time period is a high level; in response to the first comparison result that within the second time period of each first time period, the signal value of the modulation wave is less than the signal value of the first carrier, determining that the level of the first pulse width modulation signal within the second time period is a low level; in response to the first comparison result that within the first time period of each first time period, the signal value of the modulation wave is greater than or equal to the signal value of the first carrier, determining that the level of the second pulse width modulation signal within the first time period is a low level; in response to the first comparison result that within the second time period of each first time period, the signal value of the modulation wave is less than the signal value of the first carrier, determining that the level of the second pulse width modulation signal within the second time period is a high level.

[0071] In this embodiment, the above-mentioned first time period can be used to represent the time interval between the same electrical signals of the first pulse width modulation signal, and the above-mentioned first time period can also be used to represent the time interval between the same electrical signals of the second pulse width modulation signal. The above-mentioned first time period can be used to represent the time interval between two adjacent identical signal values of the first carrier, and the above-mentioned second time period can be used to represent the time interval between another two adjacent identical signal values of the first carrier. For example, among multiple identical signal values of the modulation wave and the first carrier, the adjacent first identical signal value and the second identical signal value can be used to determine the first time period, and the adjacent second identical signal value and the third identical signal value can be used to determine the second time period.

[0072] Optionally, by comparing the modulation wave with the first carrier wave, a first comparison result can be obtained. Then, by analyzing the first comparison result, a first pulse width modulation signal and a second pulse width modulation signal can be obtained. For example, if the first comparison result is that within at least one first time period, in the first time period of each first time period, the signal value of the modulation wave is greater than or equal to the signal value of the first carrier wave, then it is determined that the level of the first pulse width modulation signal within the first time period is high level. If the first comparison result is that within the second time period of each first time period, the signal value of the modulation wave is less than the signal value of the first carrier wave, then it is determined that the level of the first pulse width modulation signal within the second time period is low level; if the first comparison result is that within the first time period of each first time period, the signal value of the modulation wave is greater than or equal to the signal value of the first carrier wave, then it is determined that the level of the second pulse width modulation signal within the first time period is low level. If the first comparison result is that within the second time period of each first time period, the signal value of the modulation wave is less than the signal value of the first carrier wave, then it is determined that the level of the second pulse width modulation signal within the second time period is high level, thereby achieving the technical effect of obtaining the first pulse width modulation signal and the second pulse width modulation signal.

[0073] For example, in the case where the first time period is 3S, the first time period is 2S, and the second time period is 1S, if the first comparison result is that within at least one 3S cycle, in the 2S time period of each 3S cycle, the signal value of the modulation wave is greater than or equal to the signal value of the first carrier wave, then it is determined that the level of the first pulse width modulation signal within the 2S time period is high level. If the first comparison result is that within the 1S time period of each 3S cycle, the signal value of the modulation wave is less than the signal value of the first carrier wave, then it is determined that the level of the first pulse width modulation signal within the 1S time period is low level; if the first comparison result is that within the 2S time period of each 3S cycle, the signal value of the modulation wave is greater than or equal to the signal value of the first carrier wave, then it is determined that the level of the second pulse width modulation signal within the 2S time period is low level. If the first comparison result is that within the 1S time period of each 3S cycle, the signal value of the modulation wave is less than the signal value of the first carrier wave, then it is determined that the level of the second pulse width modulation signal within the 1S time period is high level. This is only for illustrative purposes and is not specifically limited.

[0074] In this embodiment, it is necessary to determine the third pulse width modulation signal corresponding to the third switching tube and the fourth pulse width modulation signal corresponding to the fourth switching tube based on the modulation wave and the second carrier wave. Next, a further introduction will be made on how to determine the third pulse width modulation signal corresponding to the third switching tube and the fourth pulse width modulation signal corresponding to the fourth switching tube based on the modulation wave and the second carrier wave.

[0075] As an alternative implementation manner, determining a third pulse width modulation signal corresponding to a third switching tube and a fourth pulse width modulation signal corresponding to a fourth switching tube based on a modulation wave and a second carrier wave includes: comparing the modulation wave with the second carrier wave to obtain the third pulse width modulation signal and the fourth pulse width modulation signal.

[0076] In this embodiment, by comparing the modulation wave with the second carrier wave, a third pulse width modulation signal corresponding to the third switching tube and a fourth pulse width modulation signal corresponding to the fourth switching tube can be obtained, thereby achieving the technical effect that the third pulse width modulation signal corresponding to the third switching tube and the fourth pulse width modulation signal corresponding to the fourth switching tube can be determined based on the modulation wave and the second carrier wave.

[0077] In this embodiment, it is necessary to determine how to obtain the third pulse width modulation signal and the fourth pulse width modulation signal by comparing the modulation wave with the second carrier wave. The above comparison method will be further introduced below.

[0078] As an alternative implementation manner, comparing the modulation wave with the second carrier wave to obtain the third pulse width modulation signal and the fourth pulse width modulation signal includes: comparing the modulation wave with the second carrier wave to obtain a second comparison result; in response to the second comparison result that within at least one second time period, within a third time period of each second time period, the signal value of the modulation wave is less than the signal value of the second carrier wave, determining that the level of the third pulse width modulation signal within the third time period is a high level; in response to the second comparison result that within a fourth time period of each second time period, the signal value of the modulation wave is greater than or equal to the signal value of the second carrier wave, determining that the level of the third pulse width modulation signal within the fourth time period is a low level; in response to the second comparison result that within a third time period of each second time period, the signal value of the modulation wave is less than the signal value of the second carrier wave, determining that the level of the fourth pulse width modulation signal within the third time period is a low level; in response to the second comparison result that within a fourth time period of each second time period, the signal value of the modulation wave is greater than or equal to the signal value of the second carrier wave, determining that the level of the fourth pulse width modulation signal within the fourth time period is a high level.

[0079] In this embodiment, the above-mentioned second time period can be used to represent the time interval between the same electrical signals of the third pulse width modulation signal, and the above-mentioned second time period can also be used to represent the time interval between the same electrical signals of the fourth pulse width modulation signal. The above-mentioned third time period can be used to represent the time interval between two adjacent same signal values of the second carrier, and the above-mentioned fourth time period can be used to represent the time interval between another two adjacent same signal values of the second carrier. For example, among the multiple same signal values of the modulation wave and the second carrier, the adjacent first same signal value and the second same signal value can be used to determine the third time period, and the adjacent second same signal value and the third same signal value can be used to determine the fourth time period. There is no specific limitation here, and only an example is given for illustration.

[0080] Optionally, by comparing the modulation wave and the second carrier, a second comparison result can be obtained. Then, by analyzing the second comparison result, the third pulse width modulation signal and the fourth pulse width modulation signal can be obtained. For example, if the second comparison result is that within the third time period of each second time period in at least one second time period, the signal value of the modulation wave is less than the signal value of the second carrier, then it is determined that the level of the third pulse width modulation signal within the third time period is high level. If the second comparison result is that within the fourth time period of each second time period, the signal value of the modulation wave is greater than or equal to the signal value of the second carrier, then it is determined that the level of the third pulse width modulation signal within the fourth time period is low level; if the second comparison result is that within the third time period of each second time period, the signal value of the modulation wave is less than the signal value of the second carrier, then it is determined that the level of the fourth pulse width modulation signal within the third time period is low level. If the second comparison result is that within the fourth time period of each second time period, the signal value of the modulation wave is greater than or equal to the signal value of the second carrier, then it is determined that the level of the fourth pulse width modulation signal within the fourth time period is high level, thereby achieving the technical effect of obtaining the third pulse width modulation signal and the fourth pulse width modulation signal.

[0081] For example, in the case where the second time period is 3S, the third time period is 1S, and the fourth time period is 2S, if the second comparison result is that within the 1S time period of each 3S cycle in at least one 3S cycle, the signal value of the modulation wave is less than the signal value of the second carrier wave, then the level of the third pulse width modulation signal within the 1S time period is determined to be high level; if the second comparison result is that within the 2S time period of each 3S cycle, the signal value of the modulation wave is greater than or equal to the signal value of the second carrier wave, then the level of the third pulse width modulation signal within the 2S time period is determined to be low level; if the second comparison result is that within the 1S time period of each 3S cycle, the signal value of the modulation wave is less than the signal value of the second carrier wave, then the level of the fourth pulse width modulation signal within the 1S time period is determined to be low level; if the second comparison result is that within the 2S time period of each 3S cycle, the signal value of the modulation wave is greater than or equal to the signal value of the second carrier wave, then the level of the fourth pulse width modulation signal within the 2S time period is determined to be high level. Here is only an example for illustration and no specific limitation is made.

[0082] FIG. 3(a) is a schematic diagram of the main topology of a control circuit of a voltage converter according to an embodiment of the present invention. As shown in FIG. 3(a), the four switching tubes in the main topology diagram are Q1, Q2, Q3, and Q4 respectively, and the two capacitors in the main topology diagram are C1 and C2 respectively. Among them, Q1 and Q2 can form a complementary pair, and Q3 and Q4 can form a complementary pair.

[0083] FIG. 3(b) is a schematic diagram of the secondary topology of a control circuit of a voltage converter according to an embodiment of the present invention. As shown in FIG. 3(b), the control circuit of the voltage converter can be applied to the scenario of a Maximum PowerPoint Tracking (MPPT) & DCDC main board. Through the MPPT main channel, the open-circuit voltage of the photovoltaic panel can be boosted / buck-boosted synchronously. For example, in the MPPT main channel, four switching tubes Q1, Q2, Q3, and Q4 can be set, and then through the above-mentioned switching tubes Q1 to Q4, the initial input voltage of the voltage converter can be modulated, thereby obtaining the target output voltage. Among them, in the scenario of the MPPT & DCDC main board, overvoltage protection measures can be set to prevent the voltage in the circuit from exceeding the maximum tolerance value designed for the circuit and causing equipment damage. An auxiliary power supply can also be set to be used as a backup power supply, so as to ensure that when the main power supply fails, the control circuit can continue to work normally through the auxiliary power supply and continue to modulate the initial input voltage of the voltage converter, thereby obtaining the target output voltage.

[0084] In this embodiment, it is necessary to transform the initial input voltage to the target output voltage. Next, how to transform the initial input voltage to the target output voltage will be further introduced.

[0085] As an alternative embodiment, in step S208, based on the pulse width modulation signal, controlling the switching tubes to perform pulse width modulation on the initial input voltage so as to convert the initial input voltage into the target output voltage includes: controlling the first switching tube based on the first pulse width modulation signal, controlling the second switching tube based on the second pulse width modulation signal, and using the controlled first switching tube and the controlled second switching tube to modulate the initial input voltage into the initial output voltage; controlling the third switching tube based on the third pulse width modulation signal, controlling the fourth switching tube based on the fourth pulse width modulation signal, and using the controlled third switching tube and the controlled fourth switching tube to modulate the initial output voltage into the target output voltage.

[0086] In this embodiment, the above-mentioned initial input voltage can be used to represent the unmodulated input voltage during actual use, and the above-mentioned target output voltage can be used to represent the output voltage obtained by modulating the initial input voltage during actual use.

[0087] Optionally, controlling the first switching tube according to the first pulse width modulation signal, controlling the second switching tube according to the second pulse width modulation signal, and using the controlled first switching tube and the controlled second switching tube to modulate the initial input voltage can obtain the initial output voltage. Controlling the third switching tube according to the third pulse width modulation signal, controlling the fourth switching tube according to the fourth pulse width modulation signal, and using the controlled third switching tube and the controlled fourth switching tube to modulate the initial output voltage can obtain the target output voltage, thereby achieving the technical effect of being able to convert the initial input voltage into the target output voltage.

[0088] In this embodiment, it is necessary to determine the type of carrier wave. The type of carrier wave will be further introduced below.

[0089] As an alternative embodiment, the type of the first carrier wave and / or the type of the second carrier wave includes at least one of the following: symmetric triangular wave type, asymmetric triangular wave type, sawtooth wave type, and sine wave type.

[0090] In this embodiment, the type of the first carrier wave and the type of the second carrier wave can be simultaneously set to the symmetric triangular wave type, or the type of the first carrier wave and the type of the second carrier wave can be simultaneously set to the asymmetric triangular wave type, or the type of the first carrier wave and the type of the second carrier wave can be simultaneously set to the sawtooth wave type, or the type of the first carrier wave and the type of the second carrier wave can be simultaneously set to the sine wave type, thereby achieving the technical effect of being able to determine the type of carrier wave.

[0091] FIG. 4(a) is a schematic diagram of a signal with a symmetric triangular wave as the carrier. As shown in FIG. 4(a), in the case of the modulation form with a symmetric triangular wave as the carrier, PWM1 and PWM2 can be generated by comparing the modulation wave and carrier 1, and PWM3 and PWM4 can be generated by comparing the modulation wave and carrier 2. Among them, PWM1 to PWM4 can respectively control switching transistors Q1 to Q4 in sequence.

[0092] FIG. 4(b) is a schematic diagram of a signal with an asymmetric triangular wave as the carrier. As shown in FIG. 4(b), in the case of the modulation form with an asymmetric triangular wave as the carrier, PWM1 and PWM2 can be generated by comparing the modulation wave and carrier 1, and PWM3 and PWM4 can be generated by comparing the modulation wave and carrier 2. Among them, PWM1 to PWM4 can respectively control switching transistors Q1 to Q4 in sequence.

[0093] FIG. 4(c) is a schematic diagram of a signal with a sawtooth wave as the carrier. As shown in FIG. 4(c), in the case of the modulation form with a sawtooth wave as the carrier, PWM1 and PWM2 can be generated by comparing the modulation wave and carrier 1, and PWM3 and PWM4 can be generated by comparing the modulation wave and carrier 2. Among them, PWM1 to PWM4 can respectively control switching transistors Q1 to Q4 in sequence.

[0094] FIG. 4(d) is a schematic diagram of a signal with a sine wave as the carrier. As shown in FIG. 4(d), in the case of the modulation form with a sine wave as the carrier, PWM1 and PWM2 can be generated by comparing the modulation wave and carrier 1, and PWM3 and PWM4 can be generated by comparing the modulation wave and carrier 2. Among them, PWM1 to PWM4 can respectively control switching transistors Q1 to Q4 in sequence.

[0095] In this embodiment, it is necessary to determine the modulation wave of the voltage converter. Next, how to determine the modulation wave of the voltage converter will be further introduced.

[0096] As an optional implementation manner, step S204, determining the modulation wave of the voltage converter based on at least the initial input voltage and the target output voltage includes: determining the modulation wave based on the third comparison result between the initial input voltage and the target output voltage, and the carrier.

[0097] In this embodiment, based on the third comparison result between the initial input voltage and the target output voltage, and the carrier wave, the modulation wave is determined. For example, by comparing the initial input voltage with the target output voltage, the third comparison result between the two voltages can be obtained. Then, by analyzing the third comparison result, the modulation wave of the voltage converter can be determined according to the center point of the carrier wave amplitude, thus achieving the technical effect of being able to determine the modulation wave of the voltage converter.

[0098] In this embodiment, it is necessary to determine the modulation wave according to the comparison result and the carrier wave. Next, how to determine the modulation wave according to the comparison result and the carrier wave will be further introduced.

[0099] As an optional implementation manner, based on the comparison result between the initial input voltage and the target output voltage, and the carrier wave, determining the modulation wave includes: in response to the third comparison result being that the initial input voltage is equal to the target output voltage, determining the carrier wave amplitude of the first ratio as the value of the modulation wave; in response to the third comparison result being that the initial input voltage is less than the target output voltage, determining the carrier wave amplitude of the second ratio as the value of the modulation wave; in response to the third comparison result being that the initial input voltage is greater than the target output voltage, determining the carrier wave amplitude of the third ratio as the value of the modulation wave.

[0100] In this embodiment, the second ratio can be greater than the first ratio, and the third ratio can be less than the first ratio. For example, the first ratio can be set to 0.5, the second ratio can be set to a value between 0.5 and 1.0, and the third ratio can be set to a value between 0.0 and 0.5. There is no specific limitation here, only for illustrative purposes.

[0101] Optionally, by analyzing the third comparison result between the initial input voltage and the target output voltage, the modulation wave of the voltage converter can be determined according to the center point of the carrier wave amplitude. For example, if the third comparison result is that the initial input voltage is equal to the target output voltage, then the carrier wave amplitude of the first ratio is determined as the value of the modulation wave; if the third comparison result is that the initial input voltage is less than the target output voltage, then the carrier wave amplitude of the second ratio is determined as the value of the modulation wave; if the third comparison result is that the initial input voltage is greater than the target output voltage, then the carrier wave amplitude of the third ratio is determined as the value of the modulation wave, thus achieving the technical effect of being able to determine the modulation wave according to the comparison result and the carrier wave.

[0102] Optionally, when the first ratio is set to 0.5, if the third comparison result is that the initial input voltage is equal to the target output voltage, the center point of the carrier amplitude (i.e., 0.5) is determined as the value of the modulation wave; if the third comparison result is that the initial input voltage is less than the target output voltage, a value above the center point of the carrier amplitude (i.e., a value between 0.5 and 1.0) is determined as the value of the modulation wave; if the third comparison result is that the initial input voltage is greater than the target output voltage, a value below the center point of the carrier amplitude (i.e., a value between 0.0 and 0.5) is determined as the value of the modulation wave.

[0103] In this embodiment, it is necessary to obtain the initial input voltage of the voltage converter and the target output voltage to which the initial input voltage is to be converted. Next, how to obtain the initial input voltage and the target output voltage will be further introduced.

[0104] As an alternative implementation, step S202, obtaining the initial input voltage of the voltage converter and the target output voltage to which the initial input voltage is to be converted, includes: determining the voltage of the energy storage system as the initial input voltage; and determining the voltage required by the energy-consuming system as the target output voltage.

[0105] In this embodiment, the above-mentioned energy storage system can be used to charge the energy-consuming system. A portable energy storage device can be provided in the energy storage system, and a battery, a battery pack, etc. can be provided in the energy-consuming system. For example, the portable energy storage device can be a photovoltaic panel, etc. There is no specific limitation here, only for illustration.

[0106] Optionally, the voltage of the portable energy storage device is determined as the initial input voltage, and the voltage required by the battery is determined as the target output voltage, or the voltage of the portable energy storage device is determined as the initial input voltage, and the voltage required by the battery pack is determined as the target output voltage, thereby achieving the technical effect of being able to obtain the initial input voltage and the target output voltage.

[0107] In this embodiment, it is necessary to determine the initial input voltage. Next, how to determine the initial input voltage will be further introduced.

[0108] As an alternative implementation, determining the voltage of the energy storage system as the initial input voltage includes: determining the open-circuit voltage or the maximum power operating point voltage of the power generation device in the energy storage system as the initial input voltage.

[0109] In this embodiment, the above-mentioned power generation device can be used to generate direct current to supply energy to the battery. For example, the above-mentioned power generation device can be a photovoltaic panel, etc. There is no specific limitation here, only for illustration.

[0110] Optionally, the open-circuit voltage or the maximum power operating point voltage of the power generation device in the energy storage system can be determined as the initial input voltage. For example, the open-circuit voltage or the maximum power operating point voltage of the photovoltaic panel can be determined as the initial input voltage, thereby achieving the technical effect of being able to determine the initial input voltage.

[0111] In this embodiment, it is necessary to use a driver to transform the initial input voltage. Next, how to transform the initial input voltage by using the driver will be further introduced.

[0112] As an optional implementation manner, step S208, based on the pulse width modulation signal, controls the switching tube to perform pulse width modulation on the initial input voltage to transform the initial input voltage to the target output voltage, including: based on the pulse width modulation signal, triggering the driver to control the switching tube to perform pulse width modulation on the initial input voltage to transform the initial input voltage to the target output voltage.

[0113] In this embodiment, according to the pulse width modulation signals corresponding to the switching tubes in each switching tube group, the driver can be triggered, and then the triggered driver can be used to control the corresponding switching tubes respectively to perform pulse width modulation on the initial input voltage thereon, so as to transform the initial input voltage thereon to the target output voltage, thereby achieving the technical effect of being able to transform the initial input voltage by using the driver.

[0114] Optionally, according to the first pulse width modulation signal PWM1, the driver can be triggered, and then the triggered driver can be used to control the first switching tube Q1 to modulate the first initial input voltage to obtain the first target output voltage. According to the second pulse width modulation signal PWM2, the driver can be triggered, and then the triggered driver can be used to control the second switching tube Q2 to modulate the second initial input voltage to obtain the second target output voltage. According to the third pulse width modulation signal PWM3, the driver can be triggered, and then the triggered driver can be used to control the third switching tube Q3 to modulate the third initial input voltage to obtain the third target output voltage. According to the fourth pulse width modulation signal PWM4, the driver can be triggered, and then the triggered driver can be used to control the fourth switching tube Q4 to modulate the fourth initial input voltage to obtain the fourth target output voltage. Then, according to the first target output voltage, the second target output voltage, the third target output voltage, and the fourth target output voltage, the target output voltage can be determined.

[0115] The embodiment of the present invention also provides a control system for a voltage converter. It should be noted that the control system for the voltage converter can be used to execute the control method of the voltage converter in the embodiment of the present invention.

[0116] Figure 5 is a schematic diagram of a control system for a voltage converter according to an embodiment of the present invention. AsFigure 5 As shown, the control system 500 of the voltage converter may include: a signal generation terminal 501 and a switching transistor 502.

[0117] The signal generation terminal 501 can be used to determine the modulation wave of the voltage converter based on at least the initial input voltage and the target output voltage to which the initial input voltage is to be converted, and determine the pulse width modulation signal corresponding to the switching transistor based on the modulation wave and the carrier wave corresponding to the switching transistor.

[0118] In this embodiment, the above voltage converter can be used to convert the voltage output by the power generation device. The above initial input voltage can be used to represent the input voltage output by the power generation device to the voltage converter during actual use. The above target output voltage can be used to represent the output voltage after the voltage converter converts the input voltage during actual use. The modulation wave of the voltage converter can be used to represent the modulation signal of the voltage converter. The pulse width modulation signal can be used to perform pulse width modulation on the initial input voltage. For example, the above voltage converter can be a DC-DC converter. The above initial input voltage can be called the input voltage during actual use. The above target output voltage can be called the output voltage during actual use. The above power generation device can be a photovoltaic panel. There is no specific limitation here, only for illustration.

[0119] The switching transistor 502 can be used to perform pulse width modulation on the initial input voltage based on the pulse width modulation signal to convert the initial input voltage to the target output voltage.

[0120] In this embodiment, the operation of controlling the switching transistor may include: turning off the switching transistor, turning on the switching transistor, etc. There is no specific limitation here, only for illustration.

[0121] Optionally, by setting a signal generation terminal in the control system of the voltage converter, the modulation wave of the voltage converter can be determined based on at least the initial input voltage and the target output voltage to which the initial input voltage is to be converted, and the pulse width modulation signal corresponding to the switching transistor can be determined based on the modulation wave and the carrier wave corresponding to the switching transistor. And by setting a switching transistor in the control system of the voltage converter, pulse width modulation can be performed on the initial input voltage based on the pulse width modulation signal to convert the initial input voltage to the target output voltage.

[0122] As an alternative embodiment, the switching tubes include: a first switching tube, a second switching tube, a third switching tube, and a fourth switching tube. Among them, the first pulse width modulation signal corresponding to the first switching tube and the second pulse width modulation signal corresponding to the second switching tube are complementary to each other. The first pulse width modulation signal and the second pulse width modulation signal are determined based on a modulation wave and a first carrier wave. The third pulse width modulation signal corresponding to the third switching tube and the fourth pulse width modulation signal corresponding to the fourth switching tube are complementary to each other. The third pulse width modulation signal and the fourth pulse width modulation signal are determined based on the modulation wave and a second carrier wave. The carrier wave includes the first carrier wave and the second carrier wave. The pulse width modulation signals include the first pulse width modulation signal, the second pulse width modulation signal, the third pulse width modulation signal, and the fourth pulse width modulation signal.

[0123] In this embodiment, the first switching tube Q1 and the second switching tube Q2 can form a complementary pair, the third switching tube Q3 and the fourth switching tube Q4 can form a complementary pair. The first carrier wave can be denoted as carrier wave 1, the second carrier wave can be denoted as carrier wave 2, the first pulse width modulation signal can be denoted as PWM1, the second pulse width modulation signal can be denoted as PWM2, the third pulse width modulation signal can be denoted as PWM3, and the fourth pulse width modulation signal can be denoted as PWM4. There is no specific limitation here, only for illustrative purposes.

[0124] Optionally, according to the modulation wave and the first carrier wave corresponding to the first switching tube group, the first pulse width modulation signal PWM1 corresponding to the first switching tube Q1 and the second pulse width modulation signal PWM2 corresponding to the second switching tube Q2 can be determined. According to the modulation wave and the second carrier wave corresponding to the second switching tube group, the third pulse width modulation signal PWM3 corresponding to the third switching tube Q3 and the fourth pulse width modulation signal PWM4 corresponding to the fourth switching tube Q4 can be determined, thereby achieving the technical effect that the pulse width modulation signals corresponding to each switching tube can be determined.

[0125] As an alternative embodiment, a driver is used to be triggered by the pulse width modulation signal to control the switching tubes to perform pulse width modulation on the initial input voltage to obtain a target output voltage.

[0126] In this embodiment, according to the pulse width modulation signals corresponding to each switching tube in each switching tube group, the driver can be triggered, and then the triggered driver is used to separately control the corresponding switching tubes to perform pulse width modulation on the initial input voltage thereon, so as to transform the initial input voltage thereon to the target output voltage, thereby achieving the technical effect that the initial input voltage can be transformed by the driver.

[0127] Optionally, according to the first pulse width modulation signal PWM1, the driver can be triggered, and then the triggered driver is used to control the first switching transistor Q1 to modulate the first initial input voltage to obtain the first target output voltage. According to the second pulse width modulation signal PWM2, the driver can be triggered, and then the triggered driver is used to control the second switching transistor Q2 to modulate the second initial input voltage to obtain the second target output voltage. According to the third pulse width modulation signal PWM3, the driver can be triggered, and then the triggered driver is used to control the third switching transistor Q3 to modulate the third initial input voltage to obtain the third target output voltage. According to the fourth pulse width modulation signal PWM4, the driver can be triggered, and then the triggered driver is used to control the fourth switching transistor Q4 to modulate the fourth initial input voltage to obtain the fourth target output voltage. Then, according to the first target output voltage, the second target output voltage, the third target output voltage, and the fourth target output voltage, the target output voltage can be determined.

[0128] As an alternative implementation, a control system for another voltage converter is also provided.

[0129] Figure 6 It is a schematic diagram of a control system for another voltage converter according to an embodiment of the present invention. As Figure 6 shown, the control system 600 of the voltage converter may include: a controller 601, a voltage converter 602, and an energy consumption system 603

[0130] The controller 601 can be used to control the power generation device to output the initial input voltage of the voltage converter.

[0131] The voltage converter 602 can be used to determine a modulation wave at least based on the initial input voltage and the target output voltage to which the initial input voltage is to be converted, determine the pulse width modulation signal corresponding to the switching transistor based on the modulation wave and the carrier corresponding to the switching transistor, and control the switching transistor to perform pulse width modulation on the initial input voltage based on the pulse width modulation signal to convert the initial input voltage to the target output voltage.

[0132] The energy consumption system 603 can be used to receive the target output voltage and convert the target output voltage into target energy.

[0133] In this embodiment, the above-mentioned switching transistor can be deployed in the voltage converter, the above-mentioned controller can be an MPPT, the above-mentioned voltage converter can be a DCDC main board, and the above-mentioned energy consumption system can be a battery management system (Battery Management System, abbreviated as BMS). There is no specific limitation here, only for illustration.

[0134] Optionally, by setting a controller in the control system of the voltage converter, the initial input voltage of the power generation device output voltage converter can be controlled. By setting a voltage converter in the control system of the voltage converter, a modulation wave can be determined based on at least the initial input voltage and the target output voltage to which the initial input voltage is to be converted. Based on the modulation wave and the carrier wave corresponding to the switching tube, a pulse width modulation signal corresponding to the switching tube can be determined, and the switching tube can be controlled to perform pulse width modulation on the initial input voltage based on the pulse width modulation signal to convert the initial input voltage to the target output voltage. And by setting an energy consumption system in the control system of the voltage converter, the target output voltage can be received and the target output voltage can be converted into target energy.

[0135] As an alternative implementation, the first controller is used to control the power generation device to output the maximum power operating point voltage; or, the second controller is used to control the power generation device to output the open circuit voltage.

[0136] In this embodiment, the above-mentioned first controller can be an MPPT, which can be used to determine the maximum power operating point voltage when other load devices are included in the circuit. The above-mentioned second controller can be a voltage controller, which can be used to determine the open circuit voltage when no other load devices are included in the circuit. The initial input voltage can include the maximum power operating point voltage and the open circuit voltage. For example, the maximum power operating point voltage can be about 80% of the open circuit voltage. There is no specific limitation here, only for illustration.

[0137] Optionally, by setting a first controller in the control system of the voltage converter, the power generation device can be controlled to output the maximum power operating point voltage. By setting a second controller in the control system of the voltage converter, the power generation device can be controlled to output the open circuit voltage.

[0138] It should be noted that the process of controlling the power generation device to output voltage is a dynamic process, and the output voltage can vary according to different load conditions in the circuit.

[0139] As an alternative implementation, the battery management system is used to receive the target output voltage and convert the target output voltage into the target energy required by the battery system.

[0140] In this embodiment, by setting a battery management system in the control system of the voltage converter, the target output voltage can be received and the target output voltage can be converted into the target energy required by the battery system.

[0141] Figure 7(a) is a schematic diagram of the relationship between voltage and current according to the related art. As shown in Figure 7(a), before the voltage gradually increases to 25V, the current is basically stable between 5.5A and 6A. When the voltage increases from 25V to 41V, the current decreases rapidly in a parabolic shape.

[0142] Figure 7(b) is a schematic diagram of the relationship between voltage and power according to the related art. As shown in Figure 7(b), before the voltage gradually increases to 33V, the power rapidly increases at a stable slope. When the voltage increases from 33V to 41V, the power rapidly decreases in a parabolic shape.

[0143] Figure 8 is a flowchart of a method for measuring voltage and current according to the related art. As Figure 8 shown, the method may include the following steps:

[0144] Step S801, measure the current voltage U(K) and the current current I(K).

[0145] After measuring the current voltage U(K) and the current current I(K), enter step S802 to calculate the current power P(K).

[0146] After calculating the current power P(K), enter step S803 to determine whether the current power P(K) is equal to the historical power P(K - 1).

[0147] If the current power P(K) is equal to the historical power P(K - 1), return to step S802. If the current power P(K) is not equal to the historical power P(K - 1), enter step S804 to determine whether the current power P(K) is greater than the historical power P(K - 1).

[0148] If the current power P(K) is greater than the historical power P(K - 1), enter step S805 to determine whether the current voltage U(K) is greater than the historical voltage U(K - 1). If the current voltage U(K) is greater than the historical voltage U(K - 1), enter step S806 to calculate Uref = Uref + ΔU. If the current voltage U(K) is not greater than the historical voltage U(K - 1), enter step S807 to calculate Uref = Uref - ΔU.

[0149] If the current power P(K) is less than the historical power P(K - 1), enter step S808 to determine whether the current voltage U(K) is less than the historical voltage U(K - 1). If the current voltage U(K) is less than the historical voltage U(K - 1), enter step S809 to calculate Uref = Uref - ΔU. If the current voltage U(K) is not less than the historical voltage U(K - 1), enter step S810 to calculate Uref = Uref + ΔU.

[0150] In the related art, in the field of outdoor portable energy storage, due to the large number of specifications of photovoltaic panels for outdoor portable use and the wide voltage range of photovoltaic panels. During the charging process of the battery, the open-circuit voltage of the photovoltaic panel used by the user may exceed the voltage of the battery or be lower than the voltage of the battery. In order to more widely adapt to the relationship between the photovoltaic panel and the battery, a DCDC circuit is often used, which requires two duty cycle parameters to Boost / Buck respectively, and also requires a state parameter to indicate the working state, resulting in inflexibility in voltage conversion, thus there is a technical problem of low flexibility in voltage conversion.

[0151] However, in the above method of this embodiment, the initial input voltage of the voltage converter and the target output voltage to which the initial input voltage is to be converted are obtained. By comparing the initial input voltage with the target output voltage, the comparison result between the two voltages can be obtained. According to the comparison result, the modulation wave of the voltage converter can be determined. Then, based on the modulation wave of the voltage converter and the carrier wave corresponding to the switching tubes in the voltage converter, the pulse width modulation signals corresponding to the switching tubes can be determined. Furthermore, according to the pulse width modulation signals corresponding to the switching tubes, the corresponding switching tubes can be controlled respectively to perform pulse width modulation on the initial input voltage thereon, so as to convert the initial input voltage thereon to the target output voltage, achieving the purpose of boosting and bucking the initial voltage through PWM signals, thus solving the technical problem of low flexibility in voltage conversion, and further realizing the technical effect of improving the flexibility of voltage conversion.

[0152] The embodiment of the present invention also provides a control device for a voltage converter. The control device for the voltage converter in this embodiment can be used to execute the Figure 2 control method for the voltage converter shown in the embodiment of the present invention.

[0153] Figure 9 It is a schematic diagram of a control device for a voltage converter according to an embodiment of the present invention. As Figure 9 shown, the control device 900 for the voltage converter may include: an acquisition unit 901, a first determination unit 902, a second determination unit 903, and a control unit 904.

[0154] The acquisition unit 901 is configured to acquire the initial input voltage of the voltage converter and the target output voltage to which the initial input voltage is to be converted.

[0155] The first determination unit 902 is configured to determine the modulation wave of the voltage converter based at least on the initial input voltage and the target output voltage.

[0156] The second determination unit 903 is configured to determine the pulse width modulation signal corresponding to the switching tube based on the modulation wave and the carrier wave corresponding to the switching tube in the voltage converter.

[0157] A control unit 904, configured to control a switching transistor to perform pulse width modulation on an initial input voltage based on a pulse width modulation signal, so as to convert the initial input voltage to a target output voltage.

[0158] Optionally, the second determination unit 903 may include: a first determination module, configured to determine a pulse width modulation signal corresponding to a switching transistor in the switching transistor group based on a modulation wave and a carrier wave corresponding to the switching transistor group.

[0159] Optionally, the first determination module may include: a first determination sub-module, configured to determine a first pulse width modulation signal corresponding to a first switching transistor and a second pulse width modulation signal corresponding to a second switching transistor based on a modulation wave and a first carrier wave corresponding to a first switching group, where the first pulse width modulation signal and the second pulse width modulation signal are complementary to each other, the carrier wave includes the first carrier wave, and the pulse width modulation signal includes the first pulse width modulation signal and the second pulse width modulation signal; a second determination sub-module, configured to determine a third pulse width modulation signal corresponding to a third switching transistor and a fourth pulse width modulation signal corresponding to a fourth switching transistor based on a modulation wave and a second carrier wave corresponding to a second switching group, where the third pulse width modulation signal and the fourth pulse width modulation signal are complementary to each other, the carrier wave includes the second carrier wave, and the pulse width modulation signal includes the third pulse width modulation signal and the fourth pulse width modulation signal.

[0160] Optionally, the first determination sub-module may determine the first pulse width modulation signal corresponding to the first switching transistor and the second pulse width modulation signal corresponding to the second switching transistor based on the modulation wave and the first carrier wave corresponding to the first switching group by performing the following steps: comparing the modulation wave with the first carrier wave to obtain the first pulse width modulation signal and the second pulse width modulation signal.

[0161] Optionally, comparing the modulation wave with the first carrier to obtain the first pulse width modulation signal and the second pulse width modulation signal can be performed by executing the following steps: comparing the modulation wave with the first carrier to obtain a first comparison result; in response to the first comparison result being that within at least one first time period, within the first time period of each first time period, the signal value of the modulation wave is greater than or equal to the signal value of the first carrier, determining that the level of the first pulse width modulation signal within the first time period is a high level, wherein, among multiple identical signal values of the modulation wave and the first carrier, adjacent first identical signal value and second identical signal value are used to determine the first time period; in response to the first comparison result being that within the second time period of each first time period, the signal value of the modulation wave is less than the signal value of the first carrier, determining that the level of the first pulse width modulation signal within the second time period is a low level, wherein, among multiple identical signal values of the modulation wave and the first carrier, adjacent second identical signal value and third identical signal value are used to determine the second time period; in response to the first comparison result being that within the first time period of each first time period, the signal value of the modulation wave is greater than or equal to the signal value of the first carrier, determining that the level of the second pulse width modulation signal within the first time period is a low level; in response to the first comparison result being that within the second time period of each first time period, the signal value of the modulation wave is less than the signal value of the first carrier, determining that the level of the second pulse width modulation signal within the second time period is a high level.

[0162] Optionally, the second determination sub-module can determine the third pulse width modulation signal corresponding to the third switching tube and the fourth pulse width modulation signal corresponding to the fourth switching tube based on the modulation wave and the second carrier corresponding to the second switching group by executing the following steps: comparing the modulation wave with the second carrier to obtain the third pulse width modulation signal and the fourth pulse width modulation signal.

[0163] Optionally, comparing the modulation wave with the second carrier wave to obtain the third pulse width modulation signal and the fourth pulse width modulation signal can be performed by executing the following steps: comparing the modulation wave with the second carrier wave to obtain a second comparison result; in response to the second comparison result being that within at least one second time period, in a third time period of each second time period, the signal value of the modulation wave is less than the signal value of the second carrier wave, determining that the level of the third pulse width modulation signal in the third time period is a high level, wherein, among multiple identical signal values of the modulation wave and the second carrier wave, adjacent first identical signal value and second identical signal value are used to determine the third time period; in response to the second comparison result being that within a fourth time period of each second time period, the signal value of the modulation wave is greater than or equal to the signal value of the second carrier wave, determining that the level of the third pulse width modulation signal in the fourth time period is a low level, wherein, among multiple identical signal values of the modulation wave and the second carrier wave, adjacent second identical signal value and third identical signal value are used to determine the fourth time period; in response to the second comparison result being that within a third time period of each second time period, the signal value of the modulation wave is less than the signal value of the second carrier wave, determining that the level of the fourth pulse width modulation signal in the third time period is a low level; in response to the second comparison result being that within a fourth time period of each second time period, the signal value of the modulation wave is greater than or equal to the signal value of the second carrier wave, determining that the level of the fourth pulse width modulation signal in the fourth time period is a high level.

[0164] Optionally, the control unit 904 may include: a first modulation module, configured to control the first switching tube based on the first pulse width modulation signal, control the second switching tube based on the second pulse width modulation signal, and use the controlled first switching tube and the controlled second switching tube to modulate the initial input voltage into an initial output voltage; a second modulation module, configured to control the third switching tube based on the third pulse width modulation signal, control the fourth switching tube based on the fourth pulse width modulation signal, and use the controlled third switching tube and the controlled fourth switching tube to modulate the initial output voltage into a target output voltage.

[0165] Optionally, the first determination unit 902 may include: a third determination module, configured to determine a modulation wave based on a third comparison result between the initial input voltage and the target output voltage, and a carrier wave.

[0166] Optionally, the third determination module may include: a first response sub-module, configured to, in response to the third comparison result indicating that the initial input voltage is equal to the target output voltage, determine the carrier amplitude of the first proportion of carriers as the value of the modulation wave; a second response sub-module, configured to, in response to the third comparison result indicating that the initial input voltage is less than the target output voltage, determine the carrier amplitude of the second proportion as the value of the modulation wave, where the second proportion is greater than the first proportion; a third response sub-module, configured to, in response to the third comparison result indicating that the initial input voltage is greater than the target output voltage, determine the carrier amplitude of the third proportion as the value of the modulation wave, where the third proportion is less than the first proportion.

[0167] Optionally, the obtaining unit 901 may include: a fourth determination module, configured to determine the voltage of the energy storage system as the initial input voltage; a fifth determination module, configured to determine the voltage required by the energy-consuming system as the target output voltage, where the energy storage system is used to charge the energy-consuming system.

[0168] Optionally, the fourth determination module may include: a third determination sub-module, configured to determine the open-circuit voltage or the maximum power operating point voltage of the power generation device in the energy storage system as the initial input voltage.

[0169] Optionally, the control unit 904 may include: a control module, configured to trigger a driver based on a pulse width modulation signal to control a switching tube to perform pulse width modulation on the initial input voltage, so as to convert the initial input voltage to the target output voltage.

[0170] In this embodiment, the obtaining unit is configured to obtain the initial input voltage of the voltage converter and the target output voltage to which the initial input voltage is to be converted; the first determination unit is configured to determine the modulation wave of the voltage converter based on at least the initial input voltage and the target output voltage; the second determination unit is configured to determine the pulse width modulation signal corresponding to the switching tube based on the modulation wave and the carrier corresponding to the switching tube in the voltage converter; the control unit is configured to control the switching tube to perform pulse width modulation on the initial input voltage based on the pulse width modulation signal, so as to convert the initial input voltage to the target output voltage, achieving the purpose of boosting and bucking the initial voltage through the PWM signal, thereby solving the technical problem of low flexibility of voltage conversion, and further achieving the technical effect of improving the flexibility of voltage conversion.

[0171] According to an embodiment of the present invention, there is also provided a computer-readable storage medium. The computer-readable storage medium includes a stored program, where, when the program is run by a processor, it controls the device where the storage medium is located to execute the control method of the voltage converter according to the embodiment of the present invention.

[0172] According to an embodiment of the present invention, a processor is further provided. The processor is used to run a program. When the program runs, it executes the control method of the voltage converter according to the embodiment of the present invention.

[0173] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0174] In the above embodiments of the present invention, the descriptions of the respective embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0175] In several embodiments provided by the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the couplings or direct couplings or communication connections shown or discussed with each other can be through some interfaces. The indirect couplings or communication connections of the units or modules can be in electrical or other forms.

[0176] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0177] In addition, the functional units in each embodiment of the present invention can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0178] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs that can store program codes.

[0179] The foregoing is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A control method for a voltage converter, characterized in that, comprising: obtaining an initial input voltage of the voltage converter and a target output voltage to which the initial input voltage is to be converted; determining a modulation wave of the voltage converter based on at least the initial input voltage and the target output voltage; determining a pulse width modulation signal corresponding to the switching tube based on the modulation wave and a carrier wave corresponding to the switching tube in the voltage converter; controlling the switching tube to perform pulse width modulation on the initial input voltage based on the pulse width modulation signal, so as to convert the initial input voltage to the target output voltage.

2. The method according to claim 1, characterized in that, the switching tube comprises at least one switching tube group, the switching tube group comprises a plurality of switching tubes, wherein, determining the pulse width modulation signal corresponding to the switching tube based on the modulation wave and the carrier wave corresponding to the switching tube in the voltage converter comprises: determining the pulse width modulation signals corresponding to the switching tubes in the switching tube group based on the modulation wave and the carrier wave corresponding to the switching tube group.

3. The method according to claim 2, characterized in that, the at least one switching tube group comprises a first switching tube group and a second switching tube group, the first switching tube group comprises a first switching tube and a second switching tube, the second switching tube group comprises a third switching tube and a fourth switching tube, wherein, determining the pulse width modulation signals corresponding to the switching tubes in the switching tube group based on the modulation wave and the carrier wave corresponding to the switching tube group comprises: determining a first pulse width modulation signal corresponding to the first switching tube and a second pulse width modulation signal corresponding to the second switching tube based on the modulation wave and a first carrier wave corresponding to the first switching group, wherein the first pulse width modulation signal and the second pulse width modulation signal are complementary to each other, the carrier wave comprises the first carrier wave, and the pulse width modulation signal comprises the first pulse width modulation signal and the second pulse width modulation signal; determining a third pulse width modulation signal corresponding to the third switching tube and a fourth pulse width modulation signal corresponding to the fourth switching tube based on the modulation wave and a second carrier wave corresponding to the second switching group, wherein the third pulse width modulation signal and the fourth pulse width modulation signal are complementary to each other, the carrier wave comprises the second carrier wave, and the pulse width modulation signal comprises the third pulse width modulation signal and the fourth pulse width modulation signal.

4. The method according to claim 3, characterized in that, the signal value of the first pulse width modulation signal and the signal value of the second pulse width modulation signal are opposite to each other, and the signal value of the third pulse width modulation signal and the signal value of the fourth pulse width modulation signal are opposite to each other.

5. The method according to claim 3, characterized in that, determining a first pulse width modulation signal corresponding to the first switching tube and a second pulse width modulation signal corresponding to the second switching tube based on the modulation wave and a first carrier wave corresponding to the first switching group comprises: comparing the modulation wave with the first carrier wave to obtain the first pulse width modulation signal and the second pulse width modulation signal.

6. The method according to claim 5, characterized in that, Comparing the modulation wave and the first carrier wave to obtain the first pulse width modulation signal and the second pulse width modulation signal, including: Comparing the modulation wave and the first carrier wave to obtain a first comparison result; In response to the first comparison result being that within at least one first time period, within a first time period of each of the first time periods, the signal value of the modulation wave is greater than or equal to the signal value of the first carrier wave, determining that the level of the first pulse width modulation signal within the first time period is a high level, wherein, among multiple identical signal values of the modulation wave and the first carrier wave, adjacent first and second identical signal values are used to determine the first time period; In response to the first comparison result being that within a second time period of each of the first time periods, the signal value of the modulation wave is less than the signal value of the first carrier wave, determining that the level of the first pulse width modulation signal within the second time period is a low level, wherein, among multiple identical signal values of the modulation wave and the first carrier wave, adjacent second and third identical signal values are used to determine the second time period; In response to the first comparison result being that within the first time period of each of the first time periods, the signal value of the modulation wave is greater than or equal to the signal value of the first carrier wave, determining that the level of the second pulse width modulation signal within the first time period is a low level; In response to the first comparison result being that within the second time period of each of the first time periods, the signal value of the modulation wave is less than the signal value of the first carrier wave, determining that the level of the second pulse width modulation signal within the second time period is a high level.

7. The method according to claim 3, wherein, Based on the modulation wave and the second carrier wave corresponding to the second switch group, determining the third pulse width modulation signal corresponding to the third switch tube and the fourth pulse width modulation signal corresponding to the fourth switch tube, including: Comparing the modulation wave and the second carrier wave to obtain the third pulse width modulation signal and the fourth pulse width modulation signal.

8. The method according to claim 7, wherein, Comparing the modulation wave and the second carrier wave to obtain the third pulse width modulation signal and the fourth pulse width modulation signal, including: Comparing the modulation wave and the second carrier wave to obtain a second comparison result; In response to the second comparison result being that within at least one second time period, within a third time period of each of the second time periods, the signal value of the modulation wave is less than the signal value of the second carrier wave, determining that the level of the third pulse width modulation signal within the third time period is a high level, wherein, among multiple identical signal values of the modulation wave and the second carrier wave, adjacent first and second identical signal values are used to determine the third time period; In response to the second comparison result indicating that within the fourth time period of each of the second time periods, the signal value of the modulation wave is greater than or equal to the signal value of the second carrier wave, determine that the level of the third pulse width modulation signal within the fourth time period is a low level, where among multiple identical signal values of the modulation wave and the second carrier wave, the adjacent second identical signal value and third identical signal value are used to determine the fourth time period; In response to the second comparison result indicating that within the third time period of each of the second time periods, the signal value of the modulation wave is less than the signal value of the second carrier wave, determine that the level of the fourth pulse width modulation signal within the third time period is a low level; In response to the second comparison result indicating that within the fourth time period of each of the second time periods, the signal value of the modulation wave is greater than or equal to the signal value of the second carrier wave, determine that the level of the fourth pulse width modulation signal within the fourth time period is a high level.

9. The method according to claim 3, wherein, the initial input voltage includes a first initial input voltage on the first switching tube, a second initial input voltage on the second switching tube, a third initial input voltage on the third switching tube, and a fourth initial input voltage on the fourth switching tube, and wherein, based on the pulse width modulation signal, controlling the switching tubes to perform pulse width modulation on the initial input voltage to convert the initial input voltage to the target output voltage includes: controlling the first switching tube based on the first pulse width modulation signal, controlling the second switching tube based on the second pulse width modulation signal, and using the controlled first switching tube and the controlled second switching tube to modulate the initial input voltage to an initial output voltage; controlling the third switching tube based on the third pulse width modulation signal, controlling the fourth switching tube based on the fourth pulse width modulation signal, and using the controlled third switching tube and the controlled fourth switching tube to modulate the initial output voltage to the target output voltage.

10. The method according to claim 3, wherein, the type of the first carrier wave and / or the type of the second carrier wave includes at least one of the following: symmetric triangular wave type, asymmetric triangular wave type, sawtooth wave type, and sine wave type.

11. The method according to claim 1, wherein, determining the modulation wave of the voltage converter based at least on the initial input voltage and the target output voltage includes: determining the modulation wave based on a third comparison result between the initial input voltage and the target output voltage, and the carrier wave.

12. The method according to claim 11, wherein, determining the modulation wave based on a third comparison result between the initial input voltage and the target output voltage, and the carrier wave includes: in response to the third comparison result indicating that the initial input voltage is equal to the target output voltage, determining the carrier amplitude of a first proportion of the carrier wave as the value of the modulation wave; In response to the third comparison result indicating that the initial input voltage is less than the target output voltage, determine the value of the modulation wave as the carrier amplitude of a second ratio, where the second ratio is greater than the first ratio; In response to the third comparison result indicating that the initial input voltage is greater than the target output voltage, determine the value of the modulation wave as the carrier amplitude of a third ratio, where the third ratio is less than the first ratio.

13. The method according to any one of claims 1 to 12, wherein, obtaining the initial input voltage of the voltage converter and the target output voltage to which the initial input voltage is to be converted includes: determining the voltage of the energy storage system as the initial input voltage; determining the voltage required by the energy-consuming system as the target output voltage, where the energy storage system is used to charge the energy-consuming system.

14. The method according to claim 13, wherein, determining the voltage of the energy storage system as the initial input voltage includes: determining the open-circuit voltage or the maximum power operating point voltage of the power generation device in the energy storage system as the initial input voltage.

15. The method according to any one of claims 1 to 12, wherein, based on the pulse width modulation signal, controlling the switching tube to perform pulse width modulation on the initial input voltage to convert the initial input voltage to the target output voltage includes: based on the pulse width modulation signal, triggering a driver to control the switching tube to perform pulse width modulation on the initial input voltage to convert the initial input voltage to the target output voltage.

16. A control system for a voltage converter, wherein, comprises: a signal generation end and a switching tube, wherein, the signal generation end is configured to determine the modulation wave of the voltage converter based on at least the initial input voltage and the target output voltage to which the initial input voltage is to be converted, and determine the pulse width modulation signal corresponding to the switching tube based on the modulation wave and the carrier corresponding to the switching tube; the switching tube is configured to perform pulse width modulation on the initial input voltage based on the pulse width modulation signal to convert the initial input voltage to the target output voltage.

17. The system according to claim 16, wherein, the switching tube includes: a first switching tube, a second switching tube, a third switching tube, and a fourth switching tube, wherein the first pulse width modulation signal corresponding to the first switching tube and the second pulse width modulation signal corresponding to the second switching tube are complementary, the first pulse width modulation signal and the second pulse width modulation signal are determined based on the modulation wave and a first carrier, the third pulse width modulation signal corresponding to the third switching tube and the fourth pulse width modulation signal corresponding to the fourth switching tube are complementary, the third pulse width modulation signal and the fourth pulse width modulation signal are determined based on the modulation wave and a second carrier, the carrier includes the first carrier and the second carrier, and the pulse width modulation signal includes the first pulse width modulation signal, the second pulse width modulation signal, the third pulse width modulation signal, and the fourth pulse width modulation signal.

18. The system according to claim 16, wherein, the system comprises: a driver, configured to be triggered by the pulse width modulation signal to control the switching tube to perform pulse width modulation on the initial input voltage to obtain the target output voltage.

19. A control system for a voltage converter, wherein, it comprises: a controller, configured to control a power generation device to output an initial input voltage of the voltage converter; the voltage converter, configured to determine a modulation wave at least based on the initial input voltage and a target output voltage to which the initial input voltage is to be converted, determine a pulse width modulation signal corresponding to the switching tube based on the modulation wave and a carrier wave corresponding to the switching tube, and control the switching tube to perform pulse width modulation on the initial input voltage based on the pulse width modulation signal so as to convert the initial input voltage to the target output voltage, wherein the switching tube is disposed in the voltage converter; a power consumption system, configured to receive the target output voltage and convert the target output voltage into target energy.

20. The system according to claim 19, wherein, the controller comprises: a first controller, configured to control the power generation device to output a maximum power point voltage, wherein the initial input voltage includes the maximum power point voltage; or, a second controller, configured to control the power generation device to output an open circuit voltage, wherein the initial input voltage includes the open circuit voltage.

21. The system according to claim 19, wherein, the power consumption system comprises: a battery management system, configured to receive the target output voltage and convert the target output voltage into the target energy required by the battery system.

22. A control device for a voltage converter, wherein, it comprises: an acquisition unit, configured to acquire an initial input voltage of the voltage converter and a target output voltage to which the initial input voltage is to be converted; a first determination unit, configured to determine a modulation wave of the voltage converter at least based on the initial input voltage and the target output voltage; a second determination unit, configured to determine a pulse width modulation signal corresponding to the switching tube based on the modulation wave and a carrier wave corresponding to the switching tube in the voltage converter; a control unit, configured to control the switching tube to perform pulse width modulation on the initial input voltage based on the pulse width modulation signal so as to convert the initial input voltage to the target output voltage.

23. A computer-readable storage medium, wherein, the computer-readable storage medium includes a stored program, wherein when the program runs, it controls a device where the computer-readable storage medium is located to execute the method according to any one of claims 1 to 15.

24. A processor, wherein, the processor is configured to run a program, wherein when the program is run by the processor, it executes the method according to any one of claims 1 to 15.

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