Inverter boost control circuit, method and device for single battery

Abstract

The invention provides a single battery inversion boost control circuit, method and device, the control circuit comprises a single battery, a high-frequency voltage modulation unit, a micro-power boost circuit, a driving unit and a micro-control unit, the single battery is connected with the high-frequency voltage modulation unit through a first circuit, the single battery is connected with the micro-power boost circuit through a second circuit, and the driving unit is connected with the micro-control unit. The driving unit and the micro-control unit are connected to the output end of the micro-power booster circuit, and the micro-power booster circuit supplies power to the driving unit after boosting the voltage of the single battery to a first preset voltage value and supplies power to the micro-control unit after reducing the voltage to a second preset voltage value. Flexible voltage conversion is achieved through the micropower booster circuit, extra excessive complex voltage adjusting equipment is not needed, the relatively low voltage of a single battery can be effectively boosted to the relatively high voltage meeting the load requirement, the working state can be dynamically adjusted according to the load change, efficient and stable voltage output is ensured, and the service life of the battery is prolonged. And the electric energy conversion efficiency is improved.

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 many deficiencies in boost design. When using multiple batteries as input for boost, due to the characteristics of multiple batteries, the battery capacity needs to be divided to ensure the consistency of the battery pack, and a battery management system (BMS) must be equipped to manage the charging, discharging and balancing of the battery. This not only greatly increases the cost of the entire system, but also there is still a hidden danger of imbalance in the battery during long-term use, affecting the performance and life of the battery, and increasing maintenance costs and risks. For a single battery, the traditional boost method will face a series of serious problems such as insufficient drive and excessive loss, resulting in low boost conversion efficiency. Summary of the invention

[0003] The main purpose of the present 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 purpose, the present application provides a single-cell battery inverter boost control circuit, including: 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, the high-frequency voltage modulation unit is used for main circuit boost, 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, 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 working 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; Wherein, when the micro-power boost circuit supplies power to the micro control unit so that the micro control unit is powered on and working, the first auxiliary winding takes over the power supply.

[0006] 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.

[0007] 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.

[0008] In order to solve the above technical problems, the embodiment of the present application further provides a control method based on the above single-cell battery inverter boost control circuit, the method comprising: Starting the single battery to supply power to the micro-power boost circuit; When 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 drive unit, and reduces the voltage to the second preset voltage value, supplies power to the micro control unit.

[0009] Optionally, 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.

[0010] Optionally, after the power supply of the driving unit is switched from the micro-power boost circuit to the first auxiliary winding, the method further includes: The microcontrol 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 microcontrol unit gradually reduces the system output power and stops the system operation when the power is extremely low; the microcontrol unit adjusts the operating frequency and input current of the high-frequency voltage modulation unit in real time according to the load changes.

[0011] 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: A starting module, used for starting the single battery to supply power to the micro-power boost circuit; 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 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.

[0012] Optionally, the device further comprises: The switching module is used for, when it is detected that the micro control unit is powered on, taking over the power supply from the first auxiliary winding, so that the power supply of the driving unit is switched from the micro-power boost circuit to the first auxiliary winding.

[0013] Optionally, 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.

[0014] In order to solve the above technical problems, an electronic device according to an embodiment of the present application adopts the following technical solution: 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.

[0015] 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: The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, 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.

[0016] In order to solve the above technical problems, the embodiment of the present application also provides a computer program product, which adopts the following technical solution: 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.

[0017] Compared with the prior art, the embodiments of the present application have the following beneficial effects: The present application provides a single-cell battery inverter boost control circuit, which uses a single-cell battery as an energy input source, does not require a combination of multiple lithium batteries and a complex and expensive battery management system to match it, and reduces the battery cost and the additional overhead caused by battery management. The micro-power boost circuit realizes flexible voltage conversion, does not require additional complex 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 boost process, each component can dynamically adjust the working state according to the load change under the precise control of the micro-control unit, ensure efficient and stable voltage output, and improve 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, ensure the electrical isolation of the high-voltage part and the low-voltage part and the normal operation of the high-voltage electrical appliances, and improve the integrity and reliability of the power supply of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] 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; Figure 2 This is the second structural diagram of the single-cell battery inverter boost control circuit provided in the embodiment of the present application; Figure 3 It is a flow chart of a control method of a single-cell battery inverter boost control circuit provided in an embodiment of the present application; Figure 4 It is a structural schematic diagram of a control device of a single-cell battery inverter boost control circuit provided in an embodiment of the present application; Figure 5 This is a basic structural block diagram of the electronic device of this embodiment. DETAILED DESCRIPTION

[0020] 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 in this article have the same meaning as those generally 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.

[0021] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] refer to Figure 1 to Figure 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 circuit 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 working voltage value of the micro-control unit.

[0023] In this embodiment, a single battery can be a lithium-ion battery with a rated voltage of 3.7V, which has the advantages of high energy density and low self-discharge rate, and can provide initial power for the entire control circuit. When the system starts, the single battery provides initial power for the micro-power boost circuit through the second circuit. The inductor, switch tube, diode and output capacitor in the micro-power boost circuit work together. The switch tube starts to turn on and off under the initial control of the micro control unit. When the switch tube is turned on, the battery current flows into the inductor to store magnetic energy, and the diode is cut off at this time; when the switch tube is turned 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 to ensure that the power MOSFET in the drive unit can work normally to control the high-frequency voltage modulation unit. At the same time, the 12V is stepped down to a second preset voltage value, such as 3.3V, through a step-down circuit (such as a linear step-down regulator or a switch step-down converter) to power the MCU. The MCU is initialized and starts to monitor and control the system.

[0024] After receiving the electric energy from the single battery through the first circuit, the high-frequency voltage modulation unit starts the main circuit boosting work under the control of the MCU. For example, through the cooperation of the high-frequency transformer and the power switch tube, the input voltage is efficiently boosted by the principle of electromagnetic induction. The MCU adjusts the on and off time of the power switch tube in the high-frequency voltage modulation unit (PWM signal control) according to the load demand to achieve precise adjustment of the output voltage to meet the voltage and power requirements of different loads.

[0025] During system operation, when a charging power source is connected to charge a single battery, the charging circuit starts working. The control chip inside the charging circuit monitors the battery voltage. When the battery voltage reaches the charging limit voltage (such as 4.2V), charging is automatically stopped to prevent the battery from overcharging. During inverter operation, the inverter circuit monitors the battery voltage in real time. Once the battery voltage is lower than the preset undervoltage protection value (such as 2.5V), the inverter process is stopped immediately to avoid excessive discharge of the battery. Due to these voltage monitoring and control mechanisms during charging and inverter processes, there is no need for complex multi-cell battery packs and supporting battery management systems, which improves the boost conversion efficiency and greatly reduces costs and system complexity.

[0026] In this way, a single battery is used as the energy input source, and there is no need for a combination of multiple lithium batteries and the complex and expensive battery management system that matches them, which reduces the battery cost and the additional overhead caused by battery management. It is especially suitable for cost-sensitive application scenarios, such as small portable power equipment. The micro-power boost circuit realizes flexible voltage conversion through its own boost circuit and buck circuit, without the need for additional complex voltage regulation equipment, and can effectively boost the relatively low voltage (3V-4.2V) of a single battery to a higher voltage that meets the load requirements (such as boosting to 220V AC for external loads). During the boost process, each component can dynamically adjust its working state according to load changes under the precise control of the microcontroller unit (MCU), ensuring efficient and stable voltage output and improving the efficiency of power conversion.

[0027] 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; Wherein, when the micro-power boost circuit supplies power to the micro control unit so that the micro control unit is powered on and working, the first auxiliary winding takes over the power supply.

[0028] The first primary winding and the second primary winding of the high-frequency voltage modulation unit are both connected to the current from a single battery. When the current passes through, an alternating magnetic field is generated in the iron core, and according to the principle of electromagnetic induction, the secondary winding realizes the boost function. For example, in this embodiment, by reasonably designing the turns ratio of the first primary winding and the secondary winding, the voltage of a single battery can be boosted to 220V AC, meeting the power supply requirements of the portable power device for the external load. The first auxiliary winding is arranged opposite to the first primary winding, and its turns are designed so that when the high-frequency voltage modulation unit works normally, it can generate a stable 12V voltage, replacing the micro-power boost circuit to power the drive unit. In this way, the continuous workload of the micro-power boost circuit is reduced, the overall efficiency of the system is improved, and the stability of the power supply to the drive unit is also ensured. The second auxiliary winding works in conjunction with the secondary winding to provide a stable high-voltage power supply for the preset high-voltage electrical appliances (such as high-voltage capacitors, high-voltage detection circuits, etc.) that need to be isolated, and performs AC output, ensuring the electrical isolation of the high-voltage part and the low-voltage part, and improving the safety and reliability of the system.

[0029] When the system starts, a single battery first powers the micro-power boost circuit, which quickly establishes a power supply link between the drive unit and the microcontroller unit (MCU). The MCU completes initialization and begins to monitor the entire system. Subsequently, the MCU controls the high-frequency voltage modulation unit to start working. 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 accurately controls the switching circuit to achieve seamless switching of the drive unit power supply from the micro-power boost circuit to the first auxiliary winding. During system operation, the MCU continuously monitors the voltage of a single battery. Once it detects that the battery voltage is lower than the preset undervoltage protection value (such as 2.5V), the MCU immediately takes protective measures and stops the inverter boost process to prevent the single battery from being damaged by excessive discharge, thereby extending the battery life. At the same time, the MCU also monitors the output voltage and current of each winding of the high-frequency voltage modulation unit and the temperature of the entire system. When an abnormal situation occurs (such as the output voltage is too high or too low, the current is overloaded, the temperature is too high, etc.), the MCU can timely adjust the working parameters of the high-frequency voltage modulation unit (such as changing the current frequency or size of the primary winding) or start the corresponding protection mechanism (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 working state of the high-frequency voltage modulation unit according to the change of 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 the system efficiency, achieving efficient operation under different load conditions, effectively improving the energy utilization rate of a single battery, and further reflecting the advantages of this application in energy saving and adaptability.

[0030] In this way, a single battery is used as the energy input source, and there is no need for a combination of multiple lithium batteries and the complex and expensive battery management system that matches it, which reduces the battery cost and the additional overhead caused by battery management. It is especially suitable for cost-sensitive application scenarios, such as small portable power equipment. The micro-power boost circuit realizes flexible voltage conversion through its own boost circuit and buck circuit, without the need for additional complex voltage regulation equipment, and can effectively boost the relatively low voltage (3V-4.2V) of a single battery to a higher voltage that meets the load requirements (such as boosting to 220V AC for external load use). During the boost process, each component can dynamically adjust the working state according to the load change under the precise control of the microcontroller unit (MCU), ensuring efficient and stable voltage output and improving the power conversion efficiency. In addition, the second auxiliary winding of 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, and improving the integrity and reliability of the power supply of the entire system.

[0031] 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 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.

[0032] 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.

[0033] In one example, a single battery uses a lithium-ion battery with a capacity of 5Ah and a nominal voltage of 3.7V. The conversion unit uses an efficient DC-AC inverter circuit, such as an inverter based on a full-bridge topology. When the system starts, the single battery provides DC power to the conversion unit. Under the control of the microcontroller unit (MCU), the power switch tube in the conversion unit is alternately turned on and off according to a specific timing to convert the 3.7V DC output of the single battery into high-frequency AC. For example, the frequency of the converted AC power can be set to 50kHz, and this high-frequency AC power is 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 under the action of AC, and through the principle of electromagnetic induction, the secondary winding boosts the voltage according to the turns ratio. In this process, the MCU accurately controls the on and off time of the power switch tube in the high-frequency voltage modulation unit (through a pulse width modulation signal) according to the preset boost target and load feedback information to achieve stable and efficient boost output. The micro-power boost circuit is also powered by a single battery, which boosts the battery voltage to a first preset voltage value (such as 12V) suitable for the drive unit, and steps it down to a second preset voltage value (such as 3.3V) suitable for the MCU, providing stable power support for the drive unit and the MCU. The MCU can operate normally and fully monitor and control the entire system, including status monitoring and parameter adjustment of the conversion unit, high-frequency voltage modulation unit, drive unit, and subsequent loads that may be connected. In this way, the conversion unit converts DC into AC and then inputs it into the high-frequency voltage modulation unit, so that the high-frequency voltage modulation unit can make full use of the transformer's efficient boost characteristics in an AC environment.

[0034] Optionally, a power pin of the micro control unit is connected to a step-down output terminal of the micro power boost circuit, and a control signal pin of the micro control unit is connected to control signal pins of the drive unit and the high frequency voltage modulation unit respectively.

[0035] The control signal pins of the MCU are connected to the control signal pins of the drive unit and the high-frequency voltage modulation unit, respectively, to build an efficient control link. For the drive unit, the MCU sends precise pulse width modulation (PWM) signals through specific control signal pins. These signals control the on and off time of the power switch tube in the drive unit with extremely high frequency and precise duty cycle. For example, when it is necessary to increase the primary winding current of the high-frequency voltage modulation unit to increase the output voltage of the secondary winding, the MCU will adjust the duty cycle of the PWM signal in a timely manner to extend the on time of the power switch tube, thereby allowing more current to flow into the primary winding. According to the principle of electromagnetic induction, the secondary winding can generate a higher output voltage, realizing flexible adjustment of the output voltage.

[0036] For the high-frequency voltage modulation unit, the control signal pin of the MCU also plays a key role. The MCU can adjust the signal parameters sent to the control end of the high-frequency voltage modulation unit according to the operating status and load requirements of the system. For example, under light load conditions, the MCU will reduce the current frequency input to the primary winding of the high-frequency voltage modulation unit, which can reduce the core loss and copper loss of the high-frequency voltage modulation unit and improve the overall efficiency of the system. At the same time, when the output voltage of the secondary winding of the high-frequency voltage modulation unit fluctuates, the MCU can respond quickly and fine-tune the working state of the primary winding by changing the control signal, so that the output voltage of the secondary winding quickly stabilizes within the preset value range, ensuring the stability and reliability of power supply to the load. This close connection and control method effectively integrates the functions of each component, so that the entire single-cell battery inverter boost control circuit can achieve intelligent and efficient operation according to different working conditions and requirements, further improving the performance and adaptability of the system.

[0037] 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.

[0038] In the present 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 inductance, 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 the 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 a control signal can be accurately sent to the switch tube. In the initial stage, the switch tube is turned on, at which 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 a cut-off state, and the output capacitor maintains the voltage supply of the load.

[0039] Then, the MCU controls the switch tube to turn off. At this time, because the current in the inductor cannot change suddenly, according to the law of electromagnetic induction, a reverse electromotive force will be generated, which causes the diode to conduct, and the magnetic energy stored in the inductor is released through the diode and charges the output capacitor, thereby increasing the voltage. For example, by reasonably designing the inductance value, the on and off time of the switch tube (that is, the duty cycle of the control signal), and the capacity of the output capacitor, the voltage of a single battery of 3V-4.2V can be stably boosted to the range of 10V-15V, providing a suitable driving voltage for the drive unit.

[0040] At the same time, the output capacitor plays a role in smoothing the output voltage throughout the 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 switch tube, a diode and an output capacitor has the advantages of a relatively simple structure, low cost and the ability to effectively realize the boost function of a single battery. It does not require a complex multi-cell battery combination and a 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 especially suitable for portable power equipment or small power application scenarios that have certain restrictions on cost and space.

[0041] 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.

[0042] In this embodiment, in the actual operation of the single-cell battery inverter boost control circuit, the power switch tube included in the drive unit plays a key role in power conversion and control. The gate of the power switch tube establishes a precise connection link with the control signal pin of the MCU. For example, the MCU generates a pulse width modulation (PWM) signal of a specific frequency and duty cycle based on the system's preset program logic and the circuit parameters monitored in real time, and transmits it to the gate of the power switch tube. When the system is in the startup stage, after the micro-power boost circuit increases the voltage to a threshold sufficient to drive the power switch tube to turn on, the control signal sent by the MCU causes the power switch tube to start working. Within a working cycle, when the control signal is at a high level, the gate of the power switch tube receives sufficient driving voltage, and the power switch tube is quickly turned on. At this time, the current starts from the single-cell battery, passes through the first primary winding and the second primary winding of the high-frequency voltage modulation unit, and establishes an alternating magnetic field in the iron core, providing an energy basis for the subsequent boost process. As the system runs, when the first auxiliary winding of the high-frequency voltage modulation unit generates a stable voltage suitable for the operation of the drive unit (such as 12V), it replaces the micro-power boost circuit to power the drive unit. At this time, the drain or collector of the power switch tube is stably connected to the first auxiliary winding, ensuring that it has a continuous and reliable power supply throughout the entire working process. Under different load conditions, the MCU can dynamically adjust the control signal sent to the gate of the power switch tube. For example, when the load increases, the MCU increases the duty cycle of the control signal, so that the conduction time of the power switch tube is extended, thereby 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 the load requirements; conversely, when the load decreases, the MCU reduces the duty cycle, reduces power consumption, and improves system efficiency.

[0043] 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 realizing precise control of the entire inverter boost process, which 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, and shows good adaptability and reliability when dealing with complex and changeable load environments, which provides strong technical support for the wide application of single-cell battery inverter boost control circuits in many power application fields.

[0044] 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: S310, starting the single battery to supply power to the micro-power boost circuit; In this step, the electric energy of a single battery is transmitted to the input end 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 outputted by the battery directly acts on the inductor and other components in the micro-power boost circuit.

[0045] 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 drive unit, and reduces the voltage to the second preset voltage value, supplies power to the micro control unit.

[0046] In this step, the inductor, switch tube, diode and output capacitor in the micro-power boost circuit work together. The switch tube starts to turn on and off under the initial control of the micro control unit. When the switch tube is turned on, the battery current flows into the inductor to store magnetic energy, and the diode is cut off at this time; when the switch tube is turned 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 to ensure that the power MOSFET in the drive unit can work normally to control the high-frequency voltage modulation unit. At the same time, the 12V is stepped down to a second preset voltage value, such as 3.3V, through a step-down circuit (such as a linear step-down regulator or a switching step-down converter) to power the MCU. The MCU is initialized and starts to monitor and control the system.

[0047] After receiving the electric energy from the single battery through the first circuit, the high-frequency voltage modulation unit starts the main circuit boosting work under the control of the MCU. For example, through the cooperation of the high-frequency transformer and the power switch tube, the input voltage is efficiently boosted by the principle of electromagnetic induction. The MCU adjusts the on and off time of the power switch tube in the high-frequency voltage modulation unit (PWM signal control) according to the load demand to achieve precise adjustment of the output voltage to meet the voltage and power requirements of different loads.

[0048] During system operation, when a charging power source is connected to charge a single battery, the charging circuit starts working. The control chip inside the charging circuit monitors the battery voltage. When the battery voltage reaches the charging limit voltage (such as 4.2V), charging is automatically stopped to prevent the battery from overcharging. During inverter operation, the inverter circuit monitors the battery voltage in real time. Once the battery voltage is lower than the preset undervoltage protection value (such as 2.5V), the inverter process is stopped immediately to avoid excessive discharge of the battery. Due to these voltage monitoring and control mechanisms during charging and inverter processes, there is no need for complex multi-cell battery packs and supporting battery management systems, which improves the boost conversion efficiency and greatly reduces costs and system complexity.

[0049] In this embodiment, the single-cell battery inverter boost control circuit realizes flexible voltage conversion through a micro-power boost circuit through a unique circuit structure design and an effective control method, without the need for additional complex voltage regulation equipment, and can effectively boost the relatively low voltage (3V-4.2V) of a single-cell battery to a higher voltage that meets the load requirements (such as boosting to 220V AC for external load use). During the boost process, each component can dynamically adjust its working state according to load changes under the precise control of the microcontroller unit (MCU), ensuring efficient and stable voltage output and improving the efficiency of power conversion.

[0050] Optionally, 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.

[0051] When the MCU detects that the voltage of the first auxiliary winding reaches a stable state and meets the continuous power supply requirements of the drive unit, for example, the voltage is stable at about 12V and the fluctuation range is within a very small preset range, the MCU will control the switching circuit action. The switching circuit can be composed of components such as relays or electronic switches. When the MCU sends a switching signal, the contacts of the relay are switched or the conduction state of the electronic switch changes, so that the power supply source of the drive unit is switched from the micro-power boost circuit to the first auxiliary winding. Such a switching design has many advantages. On the one hand, it reduces the long-term load pressure of the micro-power boost circuit, because after the system runs stably, the micro-power boost circuit is no longer required to continuously provide high power to the drive unit, thereby improving the service life of the micro-power boost circuit and the reliability of the overall system; on the other hand, the first auxiliary winding of the high-frequency voltage modulation unit directly powers the drive unit, which can better utilize the electromagnetic energy conversion characteristics of the high-frequency voltage modulation unit, reduce the energy loss in the intermediate link, and further improve the operation efficiency of the system, ensuring that the drive unit can operate continuously, stably and efficiently in the subsequent working process, and laying a solid foundation for the entire single-cell battery inverter boost control circuit to achieve a stable inverter boost function.

[0052] Among them, if it is found that the output voltage does 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 working 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.

[0053] 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 that the preset high-voltage electrical appliance is provided with high-quality and stable power supply. 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, and ensures the reliable operation of the system in various high-voltage power usage scenarios.

[0054] Optionally, after the power supply of the driving unit is switched from the micro-power boost circuit to the first auxiliary winding, the method further includes: The microcontrol 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 microcontrol unit gradually reduces the system output power and stops the system operation when the power is extremely low; the microcontrol unit adjusts the operating frequency and input current of the high-frequency voltage modulation unit in real time according to the load changes.

[0055] In this embodiment, a special power monitoring module is provided inside the MCU, which can detect the remaining power of a single battery according to a certain time period (for example, every 10 milliseconds). By measuring the terminal voltage and current of the battery and combining the battery characteristic curve and power estimation algorithm pre-stored in the MCU memory, the remaining power percentage of the current battery is accurately calculated. When it is detected that the power of a single battery is lower than the preset lower limit (for example, 20%), the MCU starts the power adjustment program. First, the duty cycle of the pulse width modulation signal sent to the power switch tube in the drive unit is gradually reduced, thereby reducing the current flowing through the primary winding of the high-frequency voltage modulation unit, so that the output voltage and power of the secondary winding are reduced accordingly. In this process, the MCU continuously monitors the battery power and system output status, and reduces the system output power in a smooth and stable manner to avoid adverse effects on the load due to power drops. When the battery power is extremely low (such as less than 5%), the MCU decisively sends a stop signal to cut off the operation of the entire inverter boost system to prevent the single battery from being damaged due to excessive discharge, effectively extending the battery life.

[0056] At the same time, the MCU also senses the size and nature of the load changes in real time by monitoring the output current of the secondary winding of the high-frequency voltage modulation unit or the signal fed back by the load. When the load increases, for example, the number of originally connected small electrical appliances increases or a single high-power appliance starts, the MCU calculates the required amount of electrical energy replenishment based on the load change. Then, the MCU quickly adjusts the control signal sent to the primary winding of the high-frequency voltage modulation unit, increases the frequency of the PWM signal and appropriately increases the duty cycle, thereby increasing the input current of the primary winding. In this way, according to the principle of electromagnetic induction, the secondary winding can output higher voltage and greater power to meet the needs of the newly added load. On the contrary, when the load decreases, the MCU reduces the frequency and duty cycle of the PWM signal, reduces the input current of the primary winding, reduces the working intensity of the high-frequency voltage modulation unit, reduces the core loss and copper loss, and improves the overall operating efficiency of the system. Through this real-time and precise load adaptive adjustment mechanism, the single-cell battery inverter boost control circuit can maintain a stable and efficient operating state under various load conditions, whether it is powering small electronic devices with light loads or providing power support for heavy-load industrial instruments, it can show good performance and reliability, greatly broadening the scope of application of the circuit in many fields.

[0057] Further references Figure 4 , as a response to the above Figure 4 In order to realize the method shown in the figure, the present application provides an embodiment of a control device 400 for a single-cell battery inverter boost control circuit. Figure 4 The method embodiments shown correspond.

[0058] The 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: A starting module 410, used for starting the single battery to supply power to the micro-power boost circuit; 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.

[0059] Optionally, the device further comprises: The switching module is used for, when it is detected that the micro control unit is powered on, taking over the power supply from the first auxiliary winding, so that the power supply of the driving unit is switched from the micro-power boost circuit to the first auxiliary winding.

[0060] Optionally, 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.

[0061] 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 of this embodiment. 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 (Application Specific Integrated Circuit, ASIC), programmable gate arrays (Field-Programmable Gate Array, FPGA), digital processors (Digital Signal Processor, DSP), embedded devices, etc.

[0062] The computer device may be a computing device such as a desktop computer, a notebook, a PDA, a cloud server, etc. The computer device may interact with a user through a keyboard, a mouse, a remote controller, a touch pad, or a voice control device.

[0063] The memory 51 includes at least one type of readable storage medium, and the readable storage medium includes flash memory, hard disk, multimedia card, card-type memory (for example, SD or DX memory, etc.), 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 memory, disk, optical disk, etc. In some embodiments, the memory 51 can be an internal storage unit of the electronic device 5, such as a hard disk or memory of the electronic device 5. In other embodiments, the memory 51 can also be an external storage device of the electronic device 5, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the electronic device 5. Of course, the memory 51 can also include both the internal storage unit of the electronic device 5 and its external storage device. 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 inverter boost control circuit of a single battery. 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.

[0064] The processor 52 may be a central processing unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chips in some embodiments. The processor 52 is generally used to control the overall operation of the electronic device 5. In this embodiment, the processor 52 is used to run the program code stored in the memory 51 or process data, such as running the program code of the control method of the single-cell battery inverter boost control circuit.

[0065] 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.

[0066] The present application also provides another embodiment, namely, providing a computer-readable storage medium, wherein the computer-readable storage medium stores a program of the control method of the single-cell battery inverter boost control circuit, and 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.

[0067] The present application also provides another implementation, namely, a computer program product, which includes computer instructions, and when the computer instructions are executed by a processor, the steps of the control method of the above-mentioned single-cell battery inverter boost control circuit are implemented.

[0068] 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 a necessary general hardware online platform, and of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD), and includes a number of instructions for 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 the present application.

[0069] 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, etc. 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, etc. 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 through a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media including storage devices.

[0070] Obviously, the embodiments described above are only some embodiments of the present application, rather than all 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 is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this 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 is used for main circuit 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, 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 working voltage value of the micro-control unit.

2. The single-cell battery inverter boost control circuit according to claim 1, characterized in that: 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; Wherein, when the micro-power boost circuit supplies power to the micro control unit so that the micro control unit is powered on and working, the first auxiliary winding takes over the power supply.

3. 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, 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.

4. 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.

5. A control method for a single-cell battery inverter boost control circuit according to any one of claims 1 to 4, characterized in that: The method comprises: Starting the single battery to supply power to the micro-power boost circuit; When 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 drive unit, and reduces the voltage to the second preset voltage value, supplies power to the micro control unit.

6. The method according to claim 5, characterized in that 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.

7. The method according to claim 5, characterized in that After the power supply of the driving unit is switched from the micro-power boost circuit to the first auxiliary winding, the method further includes: The microcontrol 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 microcontrol unit gradually reduces the system output power and stops the system operation when the power is extremely low; the microcontrol unit adjusts the operating frequency and input current of the high-frequency voltage modulation unit in real time according to the load changes.

8. A control device based on the single-cell battery inverter boost control circuit according to any one of claims 1 to 4, characterized in that: The device comprises: A starting module, used for starting the single battery to supply power to the micro-power boost circuit; 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 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.

9. The device according to claim 8, characterized in that The device also includes: The switching module is used for, when it is detected that the micro control unit is powered on, taking over the power supply from the first auxiliary winding, so that the power supply of the driving unit is switched from the micro-power boost circuit to the first auxiliary winding.

10. The device according to claim 8, characterized in that The device also includes: 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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