Single-cell battery inverter boost control circuit, method and device

Abstract

The present application provides a single-cell battery inverter boost control circuit, method and device. The control circuit includes a single-cell battery, a high-frequency voltage modulation unit, a micro-power boost circuit, a drive unit and a micro-control unit. The single-cell battery is connected to the high-frequency voltage modulation unit through a first circuit, and the single-cell battery is connected to the micro-power boost circuit through a second circuit. The drive unit and the micro-control unit are connected to the output end of the micro-power boost circuit. The micro-power boost circuit boosts the voltage of the single-cell battery to a first preset voltage value, supplies power to the drive unit, and reduces the voltage to a second preset voltage value, and supplies power to the micro-control unit. The micro-power boost circuit achieves flexible voltage conversion without the need for additional complex voltage regulation equipment, and can effectively boost the relatively low voltage of the single-cell battery to a higher voltage that meets the load requirements. It can dynamically adjust the working state according to load changes, ensure efficient and stable voltage output, and improve the efficiency of power conversion.

Description

Technical Field

[0001] The present application relates to the field of inverter technology, and in particular to a single-cell battery inverter boost control circuit, method, and device. Background Art

[0002] Traditional inverters have numerous shortcomings in their boost design. When using multi-cell batteries as input for boosting, the characteristics of these batteries necessitate capacity sizing to ensure pack consistency. A battery management system (BMS) is also required to manage battery charge, discharge, and balancing. This not only significantly increases overall system cost but also creates the risk of battery imbalance over long-term use, impacting battery performance and lifespan, and increasing maintenance costs and risks. Traditional boost methods for single-cell batteries also present a series of serious issues, such as insufficient drive and excessive losses, leading to low boost conversion efficiency. Summary of the Invention

[0003] The main purpose of this application is to provide a single-cell battery inverter boost control circuit, method and device, aiming to solve the problem of low boost conversion efficiency of existing single-cell batteries.

[0004] To achieve the above-mentioned objectives, the present application provides a single-cell battery inverter boost control circuit, comprising: a single-cell battery, a high-frequency voltage modulation unit, a micro-power boost circuit, a drive unit and a micro-control unit, wherein the single-cell battery is connected to the high-frequency voltage modulation unit via a first circuit, the high-frequency voltage modulation unit is used for main line voltage boost, and the single-cell battery is connected to the micro-power boost circuit via a second circuit, the drive unit and the micro-control unit are connected to the output end of the micro-power boost circuit, the micro-power boost circuit boosts the voltage of the single-cell battery to a first preset voltage value, supplies power to the drive unit, and reduces the voltage to a second preset voltage value, supplies power to the micro-control unit, the first preset voltage value is the driving voltage value of the drive unit, and the second preset voltage value is the operating voltage value of the micro-control unit.

[0005] Optionally, the high-frequency voltage modulation unit includes a first auxiliary winding and a second auxiliary winding, the output end of the first auxiliary winding is connected to the micro control unit, and the output end of the second auxiliary winding is connected to a high-voltage part of the circuit that needs to be isolated;

[0006] Wherein, when the micro-power boost circuit supplies power to the micro control unit so that the micro control unit is powered on and in operation, the first auxiliary winding takes over the power supply.

[0007] Optionally, a conversion unit is further included, which is arranged between the single battery and the high-frequency voltage modulation unit, and is used to convert the direct current output by the single battery into alternating current and then output it to the high-frequency voltage modulation unit.

[0008] Optionally, the micro-power boost circuit includes an inductor, a switch tube, a diode and an output capacitor, the inductor is connected between the single battery and the switch tube through a second circuit, the diode is connected between the inductor and the output capacitor, and the control end of the switch tube is connected to the micro control unit through a step-down port.

[0009] In order to solve the above technical problems, an embodiment of the present application further provides a control method based on the above single-cell battery inverter boost control circuit, the method comprising:

[0010] Starting the single-cell battery to supply power to the micro-power boost circuit;

[0011] Upon receiving the preset initial control signal sent by the micro control unit, the micro power boost circuit boosts the voltage of the single battery to the first preset voltage value, supplies power to the driving unit, and reduces the voltage to the second preset voltage value, supplies power to the micro control unit.

[0012] Optionally, the method further includes:

[0013] When it is detected that the micro control unit is powered on, the first auxiliary winding takes over the power supply, so that the power supply of the driving unit is switched from the micro-power boost circuit to the first auxiliary winding.

[0014] Optionally, after the power supply of the drive unit is switched from the micro-power boost circuit to the first auxiliary winding, the method further includes:

[0015] The microcontroller unit periodically detects the remaining power of the single battery and the load set in the circuit. When the power of the single battery is lower than a preset lower limit, the microcontroller unit gradually reduces the system output power and stops the system operation when the power is extremely low; the microcontroller unit adjusts the operating frequency and input current of the high-frequency voltage modulation unit in real time according to the load changes.

[0016] In order to solve the above technical problems, the embodiment of the present application further provides a control device based on the above single-cell battery inverter boost control circuit, the device comprising:

[0017] A starting module, used for starting the single battery to supply power to the micro-power boost circuit;

[0018] The adjustment module is used for the micro-power boost circuit to boost the voltage of the single battery to the first preset voltage value and then supply power to the driving unit, and to reduce the voltage to the second preset voltage value and then supply power to the micro-control unit when receiving the preset initial control signal sent by the micro-control unit.

[0019] Optionally, the device further comprises:

[0020] The switching module is used to, when detecting that the micro control unit is powered on, have the first auxiliary winding take over the power supply, so that the power supply of the driving unit is switched from the micro-power boost circuit to the first auxiliary winding.

[0021] Optionally, the device further comprises:

[0022] The detection module is used for the microcontroller to periodically detect the remaining power of the single battery and the load set in the circuit. When the power of the single battery is lower than a preset lower limit, the microcontroller gradually reduces the system output power and stops the system operation when the power is extremely low. The microcontroller adjusts the operating frequency and input current of the high-frequency voltage modulation unit in real time according to the load changes.

[0023] In order to solve the above technical problems, an electronic device according to an embodiment of the present application adopts the following technical solution:

[0024] The electronic device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of any one of the control methods for a single-cell battery inverter boost control circuit proposed in the embodiments of the present application are implemented.

[0025] In order to solve the above technical problems, the embodiment of the present application further provides a computer-readable storage medium, which adopts the following technical solution:

[0026] The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of any one of the control methods for a single-cell battery inverter boost control circuit proposed in the embodiments of the present application.

[0027] In order to solve the above technical problems, the embodiments of the present application further provide a computer program product, which adopts the following technical solutions:

[0028] The computer program product includes computer instructions, which, when executed by a processor, implement the steps of any one of the control methods for a single-cell battery inverter boost control circuit proposed in the embodiments of the present application.

[0029] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0030] The present application provides a single-cell battery inverter boost control circuit, which uses a single-cell battery as the energy input source. It does not require a combination of multiple lithium batteries and the complex and expensive battery management system that comes with it, reducing battery costs and the additional overhead caused by battery management. The micro-power boost circuit achieves flexible voltage conversion without the need for excessively complex additional voltage regulation equipment, and can effectively boost the relatively low voltage of a single-cell battery to a higher voltage that meets the load requirements. During the boosting process, each component can dynamically adjust its working state according to load changes under the precise control of the micro-control unit, ensuring efficient and stable voltage output and improving the efficiency of power conversion. In addition, the high-frequency voltage modulation unit can provide a stable high-voltage power supply for the preset high-voltage electrical appliances that need to be isolated, ensuring the electrical isolation of the high-voltage part and the low-voltage part and the normal operation of the high-voltage electrical appliances, thereby improving the integrity and reliability of the power supply of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the solutions in this application, a brief introduction will be given below to the drawings required for use in the description of the embodiments of this application. Obviously, the drawings described below are some embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] Figure 1 This is one of the structural diagrams of the single-cell battery inverter boost control circuit provided in the embodiment of the present application;

[0033] Figure 2 This is the second structural diagram of the single-cell battery inverter boost control circuit provided in an embodiment of the present application;

[0034] Figure 3 This is a flow chart of a control method for a single-cell battery inverter boost control circuit provided by an embodiment of the present application;

[0035] Figure 4 This is a structural diagram of a control device for a single-cell battery inverter boost control circuit provided by an embodiment of the present application;

[0036] Figure 5 This is a basic structural block diagram of the electronic device in this embodiment. DETAILED DESCRIPTION

[0037] The control method of the single-cell battery inverter boost control circuit provided in the embodiment of the present application is applied to the control device of the single-cell battery inverter boost control circuit. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0038] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] refer to Figures 1 to 2 The present application provides a single-cell battery inverter boost control circuit, comprising: a single-cell battery, a high-frequency voltage modulation unit, a micro-power boost circuit, a drive unit and a micro-control unit, wherein the single-cell battery is connected to the high-frequency voltage modulation unit via a first circuit, the high-frequency voltage modulation unit is used for main line voltage boost, and the single-cell battery is connected to the micro-power boost circuit via a second circuit, the drive unit and the micro-control unit are connected to the output end of the micro-power boost circuit, the micro-power boost circuit boosts the voltage of the single-cell battery to a first preset voltage value, supplies power to the drive unit, and reduces the voltage to a second preset voltage value, supplies power to the micro-control unit, the first preset voltage value is the driving voltage value of the drive unit, and the second preset voltage value is the operating voltage value of the micro-control unit.

[0040] In this embodiment, a single battery cell can be a lithium-ion battery with a rated voltage of 3.7V. These cells offer advantages such as high energy density and low self-discharge, and are capable of providing initial power for the entire control circuit. During system startup, the single battery cell provides initial power to the micro-power boost circuit via a second circuit. The inductor, switch, diode, and output capacitor in the micro-power boost circuit work in tandem. The switch begins switching on and off under the initial control of the microcontroller unit. When the switch is on, battery current flows into the inductor, storing magnetic energy, turning off the diode. When the switch is off, the inductor releases magnetic energy, charging the output capacitor via the diode, gradually boosting the voltage to a first preset voltage, such as 12V. This voltage provides a stable driving power supply for the drive unit, ensuring the proper operation of the power MOSFET in the drive unit to control the high-frequency voltage modulation unit. Simultaneously, a step-down circuit (such as a linear buck regulator or a switching buck converter) steps down the 12V voltage to a second preset voltage, such as 3.3V, to power the MCU. The MCU initializes and begins monitoring and controlling the system.

[0041] After receiving power from a single battery cell via the first circuit, the high-frequency voltage modulation unit begins boosting the main voltage under the control of the MCU. For example, by combining a high-frequency transformer and power switches, the input voltage is efficiently boosted using the principle of electromagnetic induction. The MCU adjusts the on and off times of the power switches in the high-frequency voltage modulation unit (controlled by PWM signals) based on load demand, achieving precise regulation of the output voltage to meet the voltage and power requirements of different loads.

[0042] During system operation, when a single battery cell is charged using a power source, the charging circuit begins operating. The control chip within the charging circuit monitors the battery voltage and automatically stops charging when it reaches the charge limit (e.g., 4.2V) to prevent overcharging. During inverter operation, the inverter circuit monitors the battery voltage in real time. If the battery voltage falls below a preset undervoltage protection value (e.g., 2.5V), the inverter process is immediately stopped to prevent excessive discharge. These voltage monitoring and control mechanisms during charging and inverter operations eliminate the need for complex multi-cell battery packs and their associated battery management systems, improving boost conversion efficiency and significantly reducing cost and system complexity.

[0043] This approach uses a single battery cell as the energy input source, eliminating the need for multiple lithium-ion battery strings and the complex and expensive battery management systems that come with them. This reduces battery costs and the additional overhead associated with battery management, making it particularly suitable for cost-sensitive applications such as small portable power devices. The micro-power boost circuit achieves flexible voltage conversion through its own boost and buck circuits, eliminating the need for complex additional voltage regulators. It can effectively boost the relatively low voltage of a single battery cell (3V-4.2V) to a higher voltage that meets load requirements (e.g., up to 220V AC for external loads). During the boost process, each component, under the precise control of the microcontroller (MCU), dynamically adjusts its operating state based on load changes, ensuring efficient and stable voltage output and improving power conversion efficiency.

[0044] Optionally, the high-frequency voltage modulation unit includes a first auxiliary winding and a second auxiliary winding, the output end of the first auxiliary winding is connected to the micro control unit, and the output end of the second auxiliary winding is connected to a high-voltage part of the circuit that needs to be isolated;

[0045] Wherein, when the micro-power boost circuit supplies power to the micro control unit so that the micro control unit is powered on and in operation, the first auxiliary winding takes over the power supply.

[0046] The first and second primary windings of the high-frequency voltage modulation unit are both connected to current from a single battery cell. When current flows through the unit, an alternating magnetic field is generated in the iron core. Based on the principle of electromagnetic induction, the secondary winding performs a voltage boost function. For example, in this embodiment, by rationally designing the turns ratio of the first and secondary windings, the voltage of a single battery cell can be boosted to 220V AC, meeting the power supply requirements of a portable power device for external loads. The first auxiliary winding is positioned opposite the first primary winding. Its turns are designed so that when the high-frequency voltage modulation unit is operating normally, it can generate a stable 12V voltage, replacing the micro-power boost circuit to power the drive unit. This reduces the continuous workload of the micro-power boost circuit, improves overall system efficiency, and ensures stable power supply to the drive unit. The second auxiliary winding works in conjunction with the secondary winding to provide a stable high-voltage power supply to pre-set high-voltage electrical devices (such as high-voltage capacitors and high-voltage detection circuits) that require isolation, and also provides AC output. This ensures electrical isolation between the high-voltage and low-voltage components, improving system safety and reliability.

[0047] During system startup, a single battery cell first powers the micropower boost circuit, which quickly establishes a power supply link between the drive unit and the microcontroller unit (MCU). The MCU completes initialization and begins monitoring the entire system. The MCU then controls the high-frequency voltage modulation unit to begin operation. As the output voltage of the high-frequency voltage modulation unit rises, when the voltage of the first auxiliary winding reaches a stable 12V, the MCU precisely controls the switching circuit, ensuring a seamless transition from the micropower boost circuit to the first auxiliary winding to power the drive unit. During system operation, the MCU continuously monitors the voltage of the single battery cell. If it detects that the battery voltage falls below a preset undervoltage protection value (e.g., 2.5V), the MCU immediately takes protective measures, halting the inverter boost process to prevent damage from excessive discharge of the single battery cell and thus extending the battery's lifespan. At the same time, the MCU also monitors parameters such as the output voltage and current of each winding of the high-frequency voltage modulation unit, as well as the temperature of the entire system. When an abnormal situation occurs (such as excessively high or low output voltage, current overload, or excessive temperature), the MCU can promptly adjust the operating parameters of the high-frequency voltage modulation unit (such as changing the current frequency or magnitude of the primary winding) or activate corresponding protection mechanisms (such as cutting off part of the circuit) to achieve rectification and current conversion, ensuring that the system is always in a safe and stable operating state. In addition, the MCU dynamically adjusts the operating state of the high-frequency voltage modulation unit based on changes in the load. When the load increases, the input current of the primary winding is appropriately increased to maintain a stable output voltage; when the load decreases, the input current is reduced to improve system efficiency. This achieves efficient operation under different load conditions and effectively improves the energy utilization rate of a single battery, further demonstrating the advantages of this application in energy saving and adaptability.

[0048] This approach uses a single battery cell as the energy input source, eliminating the need for multiple lithium-ion battery strings and the associated complex and expensive battery management systems. This reduces battery costs and the associated overhead associated with battery management, making it particularly suitable for cost-sensitive applications such as small portable power devices. The micro-power boost circuit achieves flexible voltage conversion through its own boost and buck circuits, eliminating the need for complex voltage regulation equipment. It effectively boosts the relatively low voltage of a single battery cell (3V-4.2V) to a higher voltage that meets load requirements (e.g., up to 220V AC for external loads). During the boost process, each component, under precise control of the microcontroller (MCU), dynamically adjusts its operating state based on load fluctuations, ensuring efficient and stable voltage output and improving power conversion efficiency. Furthermore, the high-frequency voltage modulation unit's second auxiliary winding provides a stable high-voltage power supply for pre-selected high-voltage electrical devices requiring isolation. This ensures electrical isolation between the high-voltage and low-voltage components, ensuring the proper operation of the high-voltage electrical devices, and enhancing the integrity and reliability of the overall system power supply.

[0049] The single-cell battery inverter boost control circuit successfully solves the problems of low single-cell battery boost efficiency, high cost of traditional multi-string battery solutions and battery management difficulties through its unique circuit structure design and effective control method. It has significant application value and broad market prospects in portable power equipment and other power application scenarios with high requirements on cost and efficiency.

[0050] Optionally, a conversion unit is further included, which is arranged between the single battery and the high-frequency voltage modulation unit, and is used to convert the direct current output by the single battery into alternating current and then output it to the high-frequency voltage modulation unit.

[0051] In one example, a single-cell battery uses a lithium-ion battery with a capacity of 5Ah and a nominal voltage of 3.7V. The conversion unit utilizes a high-efficiency DC-AC inverter circuit, such as one based on a full-bridge topology. When the system starts up, the single-cell battery provides DC power to the conversion unit. Under the control of a microcontroller unit (MCU), the power switches in the conversion unit alternately turn on and off according to a specific timing sequence, converting the 3.7V DC output of the single-cell battery into high-frequency AC power. For example, the frequency of the converted AC power can be set to 50kHz. This high-frequency AC power is then output to the high-frequency voltage modulation unit. The high-frequency transformer in the high-frequency voltage modulation unit receives AC input from the conversion unit. Its primary winding generates an alternating magnetic field in response to the AC current. Through electromagnetic induction, the secondary winding boosts the voltage based on the turns ratio. During this process, the MCU precisely controls the on and off timing of the power switches in the high-frequency voltage modulation unit (via pulse-width modulation signals) based on the preset boost target and load feedback, achieving stable and efficient boost output. The micro-power boost circuit, also powered by a single battery, boosts the battery voltage to a first preset voltage (e.g., 12V) suitable for the drive unit and steps it down to a second preset voltage (e.g., 3.3V) suitable for the MCU. This provides stable power for the drive unit and MCU. This allows the MCU to operate normally and comprehensively monitor and control the entire system, including status monitoring and parameter adjustment for the conversion unit, high-frequency voltage modulation unit, drive unit, and any subsequent connected loads. This allows the conversion unit to convert DC to AC before inputting it into the high-frequency voltage modulation unit, allowing the high-frequency voltage modulation unit to fully utilize the transformer's efficient boost characteristics in an AC environment.

[0052] Optionally, the power supply pin of the micro control unit is connected to the step-down output end of the micro power boost circuit, and the control signal pin of the micro control unit is connected to the control signal pins of the driving unit and the high frequency voltage modulation unit respectively.

[0053] The MCU's control signal pins are connected to the control signal pins of the drive unit and the high-frequency voltage modulation unit, respectively, establishing an efficient control chain. To the drive unit, the MCU sends precise pulse-width modulation (PWM) signals via specific control signal pins. These signals control the on- and off-times of the power switches in the drive unit at an extremely high frequency and with a precise duty cycle. For example, when the current in the high-frequency voltage modulation unit's primary winding needs to be increased to boost the output voltage of the secondary winding, the MCU adjusts the duty cycle of the PWM signal appropriately, extending the on-time of the power switch, thereby allowing more current to flow into the primary winding. Based on the principle of electromagnetic induction, the secondary winding then generates a higher output voltage, enabling flexible output voltage regulation.

[0054] The MCU's control signal pins also play a key role in the high-frequency voltage modulation unit. The MCU can adjust the signal parameters sent to the unit's control terminal based on the system's operating status and load requirements. For example, under light load conditions, the MCU reduces the frequency of the current input to the unit's primary winding. This reduces core and copper losses, improving overall system efficiency. Furthermore, when the MCU detects fluctuations in the unit's secondary winding output voltage, it quickly responds by adjusting the control signal to fine-tune the primary winding's operating state. This allows the secondary winding's output voltage to quickly stabilize within a preset range, ensuring stable and reliable power supply to the load. This close connection and control approach effectively integrates the functions of various components, enabling the entire single-cell battery inverter-boost control circuit to achieve intelligent and efficient operation based on varying operating conditions and requirements, further enhancing the system's performance and adaptability.

[0055] Optionally, the micro-power boost circuit includes an inductor, a switch tube, a diode and an output capacitor, the inductor is connected between the single battery and the switch tube through a second circuit, the diode is connected between the inductor and the output capacitor, and the control end of the switch tube is connected to the micro control unit through a step-down circuit in the second circuit.

[0056] In this embodiment, in the single-cell battery inverter boost control circuit, the working principle of the micro-power boost circuit is based on the synergistic effect of its internal inductor, switch tube, diode and output capacitor. When the system starts, the current of the single-cell battery first flows to the inductor through the second circuit. For example, an inductor element with a suitable inductance is selected, which can store a certain amount of magnetic energy when current passes through. The switch tube starts working under the control of the MCU. The MCU is connected to the control end of the switch tube through the step-down circuit in the second circuit, so that the control signal can be accurately sent to the switch tube. In the initial stage, the switch tube is turned on. At this time, the current of the single-cell battery quickly flows through the inductor, and the inductor begins to accumulate magnetic energy. Since the equivalent resistance is small when the switch tube is turned on, the current shows a linear upward trend. During this period, the diode is in the cut-off state, and the output capacitor maintains the voltage supply of the load.

[0057] The MCU then controls the switch to turn off. At this point, because the current in the inductor cannot change suddenly, according to the law of electromagnetic induction, a reverse electromotive force is generated. This electromotive force causes the diode to conduct, releasing the magnetic energy stored in the inductor through the diode and charging the output capacitor, thereby increasing the voltage. For example, by properly designing the inductor value, the on and off times of the switch (i.e., the duty cycle of the control signal), and the capacity of the output capacitor, the voltage of a single battery cell can be stably boosted from 3V-4.2V to a range of 10V-15V, providing a suitable drive voltage for the drive unit.

[0058] At the same time, the output capacitor smoothes the output voltage throughout the entire process, reducing voltage ripple and ensuring a stable and reliable power supply for the drive unit. This micro-power boost circuit design, consisting of an inductor, a switching tube, a diode, and an output capacitor, has the advantages of a relatively simple structure, low cost, and the ability to effectively boost the voltage of a single battery cell. It does not require a complex multi-cell battery combination and the corresponding high-cost BMS management system. While meeting the power supply needs of the drive unit, it also lays the foundation for the efficient and stable operation of the entire single-cell battery inverter boost control circuit. It is particularly suitable for portable power equipment or small power application scenarios with certain cost and space constraints.

[0059] Optionally, the driving unit includes a power switch tube, a gate of the power switch tube is connected to a control signal pin of the micro control unit, and a drain or collector of the power switch tube is connected to the first auxiliary winding.

[0060] In this embodiment, in the actual operation of the single-cell battery inverter-boost control circuit, the power switch included in the drive unit plays a key role in power conversion and control. The gate of the power switch establishes a precise connection link with the control signal pin of the MCU. For example, based on the system's preset program logic and real-time monitored circuit parameters, the MCU generates a pulse-width modulation (PWM) signal with a specific frequency and duty cycle and transmits it to the gate of the power switch. During the system startup phase, after the micropower boost circuit increases the voltage to a threshold sufficient to drive the power switch on, the MCU issues a control signal to activate the power switch. During an operating cycle, when the control signal is high, the gate of the power switch receives sufficient drive voltage, causing the power switch to quickly turn on. At this point, current originates from the single-cell battery, passes through the first and second primary windings of the high-frequency voltage modulation unit, and establishes an alternating magnetic field in the iron core, providing the energy foundation for the subsequent boost process. As the system operates, when the first auxiliary winding of the high-frequency voltage modulation unit generates a stable voltage suitable for the driver unit (e.g., 12V), it takes over from the micro-power boost circuit to power the driver unit. At this point, the drain or collector of the power switch is stably connected to the first auxiliary winding, ensuring a continuous and reliable power supply throughout operation. Under varying load conditions, the MCU dynamically adjusts the control signal sent to the gate of the power switch. For example, when the load increases, the MCU increases the duty cycle of the control signal, extending the on-time of the power switch, allowing more current to flow through the primary winding of the high-frequency voltage modulation unit, thereby increasing the output voltage and power of the secondary winding to meet load requirements. Conversely, when the load decreases, the MCU reduces the duty cycle, reducing power consumption and improving system efficiency.

[0061] In this way, the gate of the power switch tube is closely connected to the MCU, and the drain or collector is connected to the first auxiliary winding, so that the drive unit can efficiently adjust the current size and on-off time of the primary winding of the high-frequency voltage modulation unit under the precise control of the MCU, thereby achieving precise control of the entire inverter boost process. This not only ensures the stable operation of the system under different working conditions, but also effectively improves the power conversion efficiency and reduces energy loss. It also shows good adaptability and reliability when dealing with complex and changeable load environments, providing strong technical support for the widespread application of single-cell battery inverter boost control circuits in many power application fields.

[0062] refer to Figure 3 , shows a flow chart of a control method based on the above-mentioned single-cell battery inverter boost control circuit provided by an embodiment of the present application. Figure 3 As shown, a control method for a single-cell battery inverter boost control circuit provided in an embodiment of the present application includes the following steps:

[0063] S310, starting the single-cell battery to supply power to the micro-power boost circuit;

[0064] In this step, the power of the single battery is transmitted to the input of the micro-power boost circuit through the connecting line. For example, if the single battery can be a 3.7V lithium battery, the DC voltage output directly acts on the inductor and other components in the micro-power boost circuit.

[0065] S320. Upon receiving the preset initial control signal sent by the micro-control unit, the micro-power boost circuit boosts the voltage of the single battery to the first preset voltage value, supplies power to the driving unit, and reduces the voltage to the second preset voltage value, and supplies power to the micro-control unit.

[0066] In this step, the inductor, switch, diode, and output capacitor in the micro-power boost circuit work together. The switch begins to turn on and off under the initial control of the microcontroller. When the switch is on, battery current flows into the inductor to store magnetic energy, turning off the diode. When the switch is off, the inductor releases magnetic energy and charges the output capacitor through the diode, gradually boosting the voltage to a first preset voltage value, such as 12V. This voltage provides a stable driving power supply for the drive unit, ensuring that the power MOSFET in the drive unit can operate normally to control the high-frequency voltage modulation unit. Simultaneously, a step-down circuit (such as a linear buck regulator or a switching buck converter) steps down the 12V to a second preset voltage value, such as 3.3V, to power the MCU. The MCU initializes and begins monitoring and controlling the system.

[0067] After receiving power from a single battery cell via the first circuit, the high-frequency voltage modulation unit begins boosting the main voltage under the control of the MCU. For example, by combining a high-frequency transformer and power switches, the input voltage is efficiently boosted using the principle of electromagnetic induction. The MCU adjusts the on and off times of the power switches in the high-frequency voltage modulation unit (controlled by PWM signals) based on load demand, achieving precise regulation of the output voltage to meet the voltage and power requirements of different loads.

[0068] During system operation, when a single battery cell is charged using a power source, the charging circuit begins operating. The control chip within the charging circuit monitors the battery voltage and automatically stops charging when it reaches the charge limit (e.g., 4.2V) to prevent overcharging. During inverter operation, the inverter circuit monitors the battery voltage in real time. If the battery voltage falls below a preset undervoltage protection value (e.g., 2.5V), the inverter process is immediately stopped to prevent excessive discharge. These voltage monitoring and control mechanisms during charging and inverter operations eliminate the need for complex multi-cell battery packs and their associated battery management systems, improving boost conversion efficiency and significantly reducing cost and system complexity.

[0069] In this embodiment, the single-cell battery inverter-boost control circuit utilizes a unique circuit structure design and effective control method to achieve flexible voltage conversion via a micro-power boost circuit. This eliminates the need for complex additional voltage regulation equipment and effectively boosts the relatively low voltage (3V-4.2V) of a single battery cell to a higher voltage that meets load requirements (e.g., up to 220V AC for external loads). During the boost process, each component, under the precise control of the microcontroller (MCU), dynamically adjusts its operating state based on load changes, ensuring efficient and stable voltage output and improving power conversion efficiency.

[0070] Optionally, the method further includes:

[0071] When it is detected that the micro control unit is powered on, the first auxiliary winding takes over the power supply, so that the power supply of the driving unit is switched from the micro-power boost circuit to the first auxiliary winding.

[0072] When the MCU detects that the voltage of the first auxiliary winding has reached a stable state and meets the continuous power supply requirements of the drive unit, for example, the voltage is stable at around 12V and the fluctuation range is within a very small preset range, the MCU controls the switching circuit. The switching circuit can be composed of components such as relays or electronic switches. When the MCU issues a switching signal, the relay contacts switch or the electronic switch changes its conduction state, causing the drive unit's power supply source to switch from the micropower boost circuit to the first auxiliary winding. This switching design has multiple advantages. First, it reduces the long-term load pressure on the micropower boost circuit. After the system stabilizes, the micropower boost circuit no longer needs to continuously provide high power to the drive unit, thereby improving the lifespan of the micropower boost circuit and the reliability of the entire system. Second, by directly powering the drive unit from the first auxiliary winding of the high-frequency voltage modulation unit, the electromagnetic energy conversion characteristics of the high-frequency voltage modulation unit are better utilized, reducing energy loss in the intermediate link, further improving system efficiency, and ensuring the drive unit's continuous, stable, and efficient operation during subsequent operation. This lays a solid foundation for achieving stable inverter-boost functionality in the entire single-cell battery inverter-boost control circuit.

[0073] If the output voltage is found to not match the preset high-voltage electrical input voltage, the MCU will calculate the required adjustment amount based on the difference and send corresponding instructions to the high-frequency voltage modulation unit through the control signal pin to change its operating parameters. Specifically, the MCU can adjust the frequency and duty cycle of the pulse width modulation signal input to the primary winding of the high-frequency voltage modulation unit. When it is necessary to increase the output voltage of the secondary winding and the second auxiliary winding, the MCU increases the duty cycle of the PWM signal to extend the current conduction time in the primary winding, thereby enhancing the magnetic field strength in the iron core. According to the law of electromagnetic induction, the induced electromotive force of the secondary winding and the second auxiliary winding increases, and the output voltage is increased; conversely, if the output voltage is to be reduced, the duty cycle is reduced.

[0074] At the same time, the MCU may also fine-tune other parameters of the high-frequency voltage modulation unit, such as adjusting the core saturation compensation parameters of the high-frequency voltage modulation unit. For example, under some special working conditions, when the load changes cause the working state of the high-frequency voltage modulation unit's core to approach saturation, the MCU can optimize the working point of the core by changing the relevant compensation parameters, so that the secondary winding and the second auxiliary winding can stably output a voltage that matches the preset high-voltage electrical appliance, avoiding voltage fluctuations and waveform distortion caused by core saturation, and ensuring high-quality and stable power supply for the preset high-voltage electrical appliance. This precise voltage matching adjustment mechanism greatly improves the compatibility and adaptability of the entire single-cell battery inverter boost control circuit with different high-voltage electrical appliances, ensuring the reliable operation of the system in various high-voltage power usage scenarios.

[0075] Optionally, after the power supply of the drive unit is switched from the micro-power boost circuit to the first auxiliary winding, the method further includes:

[0076] The microcontroller unit periodically detects the remaining power of the single battery and the load set in the circuit. When the power of the single battery is lower than a preset lower limit, the microcontroller unit gradually reduces the system output power and stops the system operation when the power is extremely low; the microcontroller unit adjusts the operating frequency and input current of the high-frequency voltage modulation unit in real time according to the load changes.

[0077] In this embodiment, a dedicated power monitoring module is built into the MCU, which monitors the remaining charge of a single battery cell at regular intervals (e.g., every 10 milliseconds). By measuring the battery's terminal voltage and current, combined with the battery characteristic curve and power estimation algorithm pre-stored in the MCU's memory, the module accurately calculates the current remaining battery charge percentage. When the battery charge level of a single battery cell falls below a preset lower limit (e.g., 20%), the MCU initiates a power adjustment procedure. This procedure first gradually reduces the duty cycle of the pulse-width modulation signal sent to the power switch in the driver unit, thereby reducing the current flowing through the primary winding of the high-frequency voltage modulation unit and, consequently, the output voltage and power of the secondary winding. During this process, the MCU continuously monitors the battery charge level and system output status, gradually and steadily reducing the system output power to avoid adverse effects on the load caused by sudden power drops. When the battery charge level is critically low (e.g., below 5%), the MCU decisively issues a stop signal, shutting down the entire inverter-boost system. This prevents damage to the single battery cell from excessive discharge and effectively extends the battery's service life.

[0078] The MCU also monitors the output current of the high-frequency voltage modulation unit's secondary winding or load feedback signals to detect changes in load size and nature in real time. When the load increases, such as when the number of connected small appliances increases or a single high-power appliance starts up, the MCU calculates the required energy replenishment based on the load change. The MCU then rapidly adjusts the control signal sent to the high-frequency voltage modulation unit's primary winding, increasing the PWM signal frequency and appropriately increasing the duty cycle, thereby increasing the primary winding's input current. This, based on the principle of electromagnetic induction, enables the secondary winding to output higher voltage and greater power to meet the demands of the increased load. Conversely, when the load decreases, the MCU reduces the PWM signal frequency and duty cycle, reducing the primary winding's input current, lowering the workload of the high-frequency voltage modulation unit, reducing core and copper losses, and improving overall system efficiency. This real-time, precise load-adaptive adjustment mechanism enables the single-cell inverter-boost control circuit to maintain stable and efficient operation under a variety of load conditions. Whether powering light-load small electronic devices or heavy-load industrial equipment, it delivers excellent performance and reliability, significantly broadening the circuit's application range.

[0079] Further references Figure 4 , as a response to the above Figure 4 In order to realize the method shown in FIG. 1 , the present application provides an embodiment of a control device 400 for a single-cell battery inverter boost control circuit. Figure 4 The method embodiment shown corresponds to the embodiment shown.

[0080] An embodiment of the present application provides a control device for a single-cell battery inverter boost control circuit. The control device 400 for a single-cell battery inverter boost control circuit includes:

[0081] A starting module 410 is used to start the single-cell battery to supply power to the micro-power boost circuit;

[0082] The adjustment module 420 is used for the micro-power boost circuit to boost the voltage of the single battery to the first preset voltage value and then supply power to the drive unit, and to reduce the voltage to the second preset voltage value and then supply power to the micro-control unit when receiving the preset initial control signal sent by the micro-control unit.

[0083] Optionally, the device further comprises:

[0084] The switching module is used to, when detecting that the micro control unit is powered on, have the first auxiliary winding take over the power supply, so that the power supply of the driving unit is switched from the micro-power boost circuit to the first auxiliary winding.

[0085] Optionally, the device further comprises:

[0086] The detection module is used for the microcontroller to periodically detect the remaining power of the single battery and the load set in the circuit. When the power of the single battery is lower than a preset lower limit, the microcontroller gradually reduces the system output power and stops the system operation when the power is extremely low. The microcontroller adjusts the operating frequency and input current of the high-frequency voltage modulation unit in real time according to the load changes.

[0087] To solve the above technical problems, the present application also provides an electronic device. Figure 5 , Figure 5 This is a basic structural block diagram of the electronic device in this embodiment.

[0088] The electronic device 5 includes a memory 51, a processor 52, and a network interface 53 that are interconnected through a system bus. It should be noted that the figure only shows an electronic device 5 with components 51-53, but it should be understood that it is not required to implement all the components shown, and more or fewer components can be implemented instead. Among them, those skilled in the art can understand that the computer device here is a device that can automatically perform numerical calculations and / or information processing according to pre-set or stored instructions, and its hardware includes but is not limited to microprocessors, application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), digital signal processors (DSPs), embedded devices, etc.

[0089] The computer device may be a desktop computer, notebook computer, PDA, cloud server, etc. The computer device may interact with the user via a keyboard, mouse, remote control, touchpad, or voice control device.

[0090] The memory 51 includes at least one type of readable storage medium, including flash memory, a hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic storage, a magnetic disk, an optical disk, etc. In some embodiments, the memory 51 may be an internal storage unit of the electronic device 5, such as the hard disk or internal memory of the electronic device 5. In other embodiments, the memory 51 may also be an external storage device of the electronic device 5, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash memory card, etc. Of course, the memory 51 may also include both the internal storage unit and an external storage device of the electronic device 5. In this embodiment, the memory 51 is generally used to store the operating system and various application software installed on the electronic device 5, such as the program code of the control method of the single-cell battery inverter boost control circuit. In addition, the memory 51 can also be used to temporarily store various types of data that have been output or are to be output.

[0091] In some embodiments, the processor 52 can be a central processing unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chip. The processor 52 is typically used to control the overall operation of the electronic device 5. In this embodiment, the processor 52 is used to execute program code or process data stored in the memory 51, such as executing the program code for the control method of the single-cell battery inverter boost control circuit.

[0092] The network interface 53 may include a wireless network interface or a wired network interface. The network interface 53 is generally used to establish a communication connection between the electronic device 5 and other electronic devices.

[0093] The present application also provides another embodiment, namely, providing a computer-readable storage medium, which stores a program of the control method of the single-cell battery inverter boost control circuit. The program of the control method of the single-cell battery inverter boost control circuit can be executed by at least one processor to enable the at least one processor to perform the steps of the control method of the single-cell battery inverter boost control circuit as described above.

[0094] The present application also provides another embodiment, namely, a computer program product, which includes computer instructions. When the computer instructions are executed by a processor, the steps of the control method of the single-cell battery inverter boost control circuit are implemented.

[0095] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware online platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, or the part that contributes to the existing technology, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, disk, optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of this application.

[0096] The present application can be used in many general or special computer system environments or configurations. For example: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, and the like. The present application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, and the like that perform specific tasks or implement specific abstract data types. The present application can also be practiced in distributed computing environments in which tasks are performed by remote processing devices connected via a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media, including storage devices.

[0097] Obviously, the embodiments described above are only some of the embodiments of the present application, rather than all of the embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present application specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present application.

Claims

1. A single-cell battery inverter boost control circuit, characterized in that: include: A single-cell battery, a high-frequency voltage modulation unit, a micro-power boost circuit, a drive unit, and a micro-control unit, wherein the single-cell battery is connected to the high-frequency voltage modulation unit via a first circuit, the high-frequency voltage modulation unit being used for main circuit voltage boosting, and the single-cell battery is connected to the micro-power boost circuit via a second circuit, the drive unit and the micro-control unit are connected to the output end of the micro-power boost circuit, the micro-power boost circuit boosts the voltage of the single-cell battery to a first preset voltage value, then supplies power to the drive unit, and steps down the voltage to a second preset voltage value, then supplies power to the micro-control unit, the first preset voltage value being the driving voltage value of the drive unit, and the second preset voltage value being the operating voltage value of the micro-control unit; The high-frequency voltage modulation unit includes a first auxiliary winding and a second auxiliary winding, the output end of the first auxiliary winding is connected to the micro control unit, and the output end of the second auxiliary winding is connected to the high-voltage part of the circuit that needs to be isolated; Wherein, when the micro-power boost circuit supplies power to the micro control unit so that the micro control unit is powered on and in operation, the first auxiliary winding takes over the power supply.

2. The single-cell battery inverter boost control circuit according to claim 1, characterized in that: It also includes a conversion unit, which is arranged between the single battery and the high-frequency voltage modulation unit. The conversion unit is used to convert the direct current output by the single battery into alternating current and then output it to the high-frequency voltage modulation unit.

3. The single-cell battery inverter boost control circuit according to claim 1, characterized in that: The micro-power boost circuit includes an inductor, a switch tube, a diode and an output capacitor. The inductor is connected between the single battery and the switch tube through a second circuit, the diode is connected between the inductor and the output capacitor, and the control end of the switch tube is connected to the micro control unit through a step-down port.

4. A control method for a single-cell battery inverter boost control circuit according to any one of claims 1 to 3, characterized in that: The method comprises: Starting the single-cell battery to supply power to the micro-power boost circuit; Upon receiving the preset initial control signal sent by the micro-control unit, the micro-power boost circuit boosts the voltage of the single battery to the first preset voltage value, and then supplies power to the driving unit, and then reduces the voltage to the second preset voltage value, and then supplies power to the micro-control unit; The method further comprises: When it is detected that the micro control unit is powered on, the first auxiliary winding takes over the power supply, so that the power supply of the driving unit is switched from the micro-power boost circuit to the first auxiliary winding.

5. The method according to claim 4, characterized in that After the power supply of the drive unit is switched from the micro-power boost circuit to the first auxiliary winding, the method further includes: The microcontroller unit periodically detects the remaining power of the single battery and the load set in the circuit. When the power of the single battery is lower than a preset lower limit, the microcontroller unit gradually reduces the system output power and stops the system operation when the power is extremely low; the microcontroller unit adjusts the operating frequency and input current of the high-frequency voltage modulation unit in real time according to the load changes.

6. A control device based on the single-cell battery inverter boost control circuit according to any one of claims 1 to 3, characterized in that: The device comprises: A starting module, used for starting the single battery to supply power to the micro-power boost circuit; an adjustment module, configured for the micro-power boost circuit to, upon receiving a preset initial control signal sent by the micro-control unit, boost the voltage of the single battery to the first preset voltage value and then supply power to the drive unit, and to reduce the voltage to a second preset voltage value and then supply power to the micro-control unit; Wherein, the device further includes: The switching module is used to, when detecting that the micro control unit is powered on, have the first auxiliary winding take over the power supply, so that the power supply of the driving unit is switched from the micro-power boost circuit to the first auxiliary winding.

7. The device according to claim 6, characterized in that The device further comprises: The detection module is used for the microcontroller to periodically detect the remaining power of the single battery and the load set in the circuit. When the power of the single battery is lower than a preset lower limit, the microcontroller gradually reduces the system output power and stops the system operation when the power is extremely low. The microcontroller adjusts the operating frequency and input current of the high-frequency voltage modulation unit in real time according to the load changes.

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