Power supply circuit and electronic device

Abstract

The utility model provides a kind of power supply circuit and electronic equipment, and the power supply circuit includes power conversion circuit, enable circuit, controller and auxiliary energy supply circuit;Power conversion circuit is used to output converted voltage after electric energy signal;Enable circuit is used to the first enable signal to the power enable end output;Controller is used to receive electric energy signal and work, and is used to the first control signal to enable circuit output;When controller does not output the first control signal, auxiliary energy supply circuit is used to the second control signal to enable circuit output.Power supply circuit in the application, when using BOOT program to upgrade application, auxiliary energy supply circuit can receive the electric energy signal of power output end, and the second control signal is output to enable circuit, control enable circuit continues to output the first enable signal to power enable end, to maintain the normal work of power conversion circuit, ensure that MCU and system power supply will not power down.

Description

Technical Field

[0001] This utility model relates to the field of controller power supply technology, specifically to power supply circuits and electronic equipment. Background Technology

[0002] With the widespread application of energy storage battery systems, customer demands for system functionality are increasing, and most of these demands can be met by simply modifying the software. This necessitates upgrading the application program using a BOOT program. Since energy storage products generally have high requirements for static power consumption, their power handling method uses a single I / O port of the MCU to output a high or low level to control the enable pin of the power circuit: when the system is not in operation, this I / O port outputs a low level to completely disconnect the power supply, thereby reducing power consumption. However, when upgrading the application program using a BOOT program, the MCU's program pointer jumps to the reset address. During the MCU reset, the aforementioned I / O port becomes high-impedance, unable to control the power supply, leading to a power loss for the MCU and ultimately causing the program upgrade to fail.

[0003] To address this issue, the current solution for energy storage systems is as follows: During the application upgrade process using the BOOT program, the system wake-up button must be manually pressed and held to force power on the system until the upgrade is complete and the application runs, controlling the power enable terminal to output a high level on the I / O port to maintain the normal operation of the MCU and system power supply. Only then can the wake-up button be released.

[0004] However, each program upgrade requires manual pressing of a button. When upgrading a large number of products, the operator's finger strength is limited. Furthermore, after certain products are assembled, the wake-up button cannot be directly touched, and operations such as unpacking are required, resulting in a large workload and low efficiency. Utility Model Content

[0005] The embodiments of this utility model provide a power supply circuit and electronic device that can improve the technical problem of inconvenient software upgrades.

[0006] In a first aspect, embodiments of this utility model provide a power supply circuit, which includes a power conversion circuit, an enabling circuit, a controller, and an auxiliary power supply circuit. The power conversion circuit includes a power input terminal, a power output terminal, and a power enabling terminal. The power input terminal is used to connect to an external power source, the power conversion circuit is used to convert the voltage of the external power source, and the power output terminal is used to output a converted electrical energy signal. The enabling circuit is connected to the external power source and the power enabling terminal, and is used to output a first enabling signal to the power enabling terminal to control the power conversion circuit to convert the voltage of the external power source. The controller is connected to the power output terminal and the enabling circuit, and is used to receive the electrical energy signal for operation, and to output a first control signal to the enabling circuit to control the enabling circuit to output the first enabling signal. The auxiliary power supply circuit is connected to the power output terminal and the enabling circuit. When the controller does not output the first control signal, the auxiliary power supply circuit can output a second control signal to the enabling circuit to control the enabling circuit to output the first enabling signal.

[0007] In some cases, by setting up an auxiliary power supply circuit, when the controller is unable to output the first control signal due to reasons such as being in a reset state during a program upgrade, the auxiliary power supply circuit can immediately intervene and output a second control signal to the enable circuit. This ensures that the enable circuit continuously outputs the first enable signal to the power enable terminal, maintaining the normal operation of the power conversion circuit, preventing the controller from losing power, and solving the problem of power interruption caused by controller reset during program upgrades. Furthermore, through the coordinated work of the enable circuit, controller, and auxiliary power supply circuit, there is no need to manually press and hold the wake-up button to maintain power supply, reducing the workload of manual operation. This is especially effective in improving work efficiency when upgrading a large number of products, and also avoids the need to open the box because the wake-up button cannot be accessed after product assembly, further enhancing the convenience of the upgrade process.

[0008] It is understood that in the aforementioned power supply circuit, the controller is a control component used to receive the electrical energy signal output by the power conversion circuit and to output a first control signal to the enabling circuit to control its output of a first enabling signal. A controller is an electronic component or circuit module with data processing and signal output functions, commonly including but not limited to microcontroller units (MCUs), single-chip microcomputers, and digital signal processors (DSPs).

[0009] In one embodiment, the enabling circuit further includes a first switching circuit, which is connected to the external power supply and the power enable terminal. The first switching circuit is used to output a second enabling signal to the enabling circuit to control the power conversion circuit to convert the voltage of the external power supply.

[0010] In some examples, a first switching circuit is incorporated to enable the power supply circuit to manually wake up the system. When the auxiliary power supply circuit malfunctions or the controller fails to start normally due to special circumstances, the wake-up circuit can be activated to trigger the first switching circuit to output a second enable signal, ensuring that the power conversion circuit can start and operate, thus improving the reliability of the power supply circuit.

[0011] In one embodiment, the first switching circuit includes a button connected to the external power supply and the power enable terminal, and the button is internally used to turn the external power supply and the power enable terminal on or off.

[0012] In some examples, by setting a button in the first switching circuit, the function of manually controlling the power enable terminal is realized, providing a direct triggering method for system startup. Especially when the automatic control mechanism (controller and auxiliary power supply circuit) is not activated, it can serve as a backup startup method to ensure that the system can be woken up.

[0013] In one embodiment, the power input terminal is connected to a plurality of external power sources, one of which supplies power to the power input terminal.

[0014] In some cases, connecting multiple external power sources to the power input terminal and selecting one to supply power enhances the reliability and adaptability of the power supply circuit. When the external power source in use malfunctions (such as power outage or voltage instability), it can be quickly switched to another normal external power source, avoiding a system power outage due to a single power source failure. This is especially beneficial during energy storage battery system program upgrades, effectively preventing upgrade failures caused by power interruptions and improving the system's resilience.

[0015] In one embodiment, the power conversion circuit is provided with a plurality of power output terminals, and the voltage of the power signal at at least two of the power output terminals is different.

[0016] In some examples, by using power conversion circuits to set multiple power output terminals with different voltages, it is possible to provide precisely matched power to multiple components within the power supply circuit, avoiding component damage or malfunction caused by voltage mismatch. At the same time, it eliminates the need for a separate voltage conversion device for each component, simplifying the circuit structure, reducing the number of components, lowering the overall size and cost of the circuit, and improving the integration and practicality of the power supply circuit.

[0017] In one embodiment, the plurality of power output terminals include a first power output terminal and a second power output terminal. The first power output terminal is connected to the auxiliary power supply circuit and is used to output the power signal to the auxiliary power supply circuit. The second power output terminal is connected to the controller and is used to output the power signal to the controller. The voltages of the power signals at the first power output terminal and the second power output terminal are different.

[0018] In some cases, by setting different voltages for the first and second power output terminals, the required operating voltages for the auxiliary power supply circuit and the controller can be accurately provided, ensuring the normal operation of these two key components. This allows the auxiliary power supply circuit to output a second control signal to the enable circuit in special circumstances such as controller reset, maintaining the operation of the power conversion circuit and avoiding system power failure caused by controller reset, thereby improving the stability and reliability of the power supply circuit.

[0019] In one embodiment, the power conversion circuit includes a first transformer chip and a second transformer chip. The input terminal, enable terminal, and output terminal of the first transformer chip serve as the power input terminal, the power enable terminal, and the first power output terminal, respectively. The input terminal of the second transformer chip is connected to the first power output terminal, and the output terminal of the second transformer chip serves as the second power output terminal. The first transformer chip is used to transform the voltage of the external power supply to output a first electrical signal, and the second transformer chip is used to transform the voltage of the first electrical signal to output a second electrical signal.

[0020] In some examples, a cascaded design of a first transformer chip and a second transformer chip enables step-by-step conversion from external power supply to different voltage signals. The first transformer chip first converts the external power supply voltage into a first electrical signal adapted to the auxiliary power supply circuit, and the second transformer chip then converts the first electrical signal into a second electrical signal adapted to the controller. This hierarchical conversion method can not only meet the voltage requirements of different components, but also unify the start-up of the entire power conversion circuit through the enable terminal of the first transformer chip, ensuring the orderliness and stability of the voltage conversion process.

[0021] In addition, by connecting the input terminal of the second transformer chip to the output terminal of the first power supply, the operation of the second transformer chip depends on the output of the first transformer chip. When the first transformer chip is not started, the second transformer chip has no input power, thus avoiding unnecessary power consumption. When the first transformer chip is started, the second transformer chip can quickly output a second electrical signal to power the controller, further optimizing the power consumption control of the circuit. At the same time, the division of labor between the two independent transformer chips improves the accuracy and reliability of voltage conversion.

[0022] In one embodiment, the auxiliary power supply circuit is connected to the power output terminal and the enable circuit, and is used to divide the voltage at the power output terminal to output the second control signal to the enable circuit.

[0023] In some cases, the voltage divider function of the auxiliary power supply circuit can convert the higher voltage at the power supply output to a suitable control voltage for the enable circuit, preventing damage to the enable circuit from excessively high voltage. Simultaneously, the resistance parameters of the auxiliary power supply circuit can be adjusted according to actual needs, thereby flexibly setting the voltage value of the second control signal to adapt to the operating requirements of different enable circuits, improving the versatility and adaptability of the auxiliary power supply circuit.

[0024] In one embodiment, the auxiliary power supply circuit includes a plurality of voltage divider resistors connected in series, one end of the plurality of voltage divider resistors being connected to the power output terminal and the other end being grounded, and the enable circuit being connected between two adjacent voltage divider resistors.

[0025] In some examples, the auxiliary power supply circuit uses a voltage divider circuit composed of multiple series voltage divider resistors to stably divide the voltage at the power supply output to a control voltage suitable for the enable circuit. This pure resistive voltage divider method is simple in structure, low in cost, requires no additional power supply or control components, and has high reliability. When the controller does not output the first control signal, the voltage divider circuit can immediately provide a stable second control signal, ensuring that the enable circuit responds in a timely manner and maintaining the normal operation of the power conversion circuit.

[0026] Furthermore, by adjusting the combination of voltage divider resistor values, enable circuits with different voltage requirements can be flexibly adapted. For example, if the enable circuit requires a 0.7V control signal, a suitable resistor value ratio can be calculated and selected to achieve precise voltage division. This configurability allows the same auxiliary power supply circuit to be applied to a variety of different power supply circuit designs, improving the circuit's versatility and compatibility.

[0027] In one embodiment, the enabling circuit includes a second switching circuit and a third switching circuit. The second switching circuit includes a first input terminal, a first output terminal, and a first enabling terminal. The first input terminal is connected to the external power supply, and the first output terminal is connected to the power enabling terminal. The third switching circuit includes a second input terminal, a second output terminal, and a second enabling terminal. The second input terminal is connected to the first enabling terminal, and the second enabling terminal is connected to the controller and the auxiliary power supply circuit. The second output terminal is grounded. The controller or the auxiliary power supply circuit controls the third switching circuit to turn on, and the turning on of the third switching circuit controls the turning on of the second switching circuit. The turning on of the second switching circuit connects the external power supply and the power enabling terminal, for outputting a first enabling signal to the power enabling terminal.

[0028] In some examples, through the coordinated operation of the second and third switching circuits, the enable circuit can precisely control the startup of the power conversion circuit based on the control signals from the controller or auxiliary power supply circuit, achieving effective control of the power enable terminal. Furthermore, this structure of the enable circuit allows the controller to control the power enable when it is operating normally, while in abnormal situations such as controller reset, the auxiliary power supply circuit takes over control, ensuring continuous operation of the power conversion circuit. This dual control mechanism improves the reliability of the power supply circuit, making it particularly suitable for energy storage battery systems that require frequent program upgrades, avoiding upgrade failures caused by MCU resets.

[0029] In some examples, the enable circuit further includes a voltage divider circuit connected to the first input terminal, the first enable terminal, and the second input terminal. When the third switching circuit is turned on, the voltage divider circuit is used to divide the voltage at the first enable terminal, thereby turning on the second switching circuit.

[0030] In some cases, the combination of a voltage divider circuit and a first switching circuit enhances the stability and anti-interference capability of the circuit.

[0031] Secondly, embodiments of this utility model provide an electronic device that includes the aforementioned power supply circuit and has all the technical effects of the aforementioned power supply circuit.

[0032] The beneficial effects of the embodiments of this utility model are as follows:

[0033] In the embodiments of this utility model, through the power supply circuit of this application, when upgrading the application using the BOOT program, the controller (MCU) resets, causing its power enable I / O port to be in a high-impedance state, unable to output the first control signal. The auxiliary power supply circuit can receive the power signal from the power output terminal and output a second control signal to the enable circuit, controlling the enable circuit to continuously output the first enable signal to the power enable terminal, thereby maintaining the normal operation of the power conversion circuit and ensuring that the MCU and system power supply do not lose power. Therefore, it is possible to complete the application upgrade operation of the BOOT program without manually pressing and holding the wake-up button, thereby improving the technical problems in related technologies where upgrading the program requires manual pressing and holding of the button for a long time, resulting in high pressure on the operator's fingers, and for certain products, requiring unpacking for operation, which is labor-intensive and inefficient. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the first power supply circuit provided in an embodiment of the present utility model;

[0036] Figure 2 This is a schematic diagram of a second power supply circuit provided in an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of a third power supply circuit provided in an embodiment of this utility model;

[0038] Figure 4 This is a schematic diagram of the fourth power supply circuit provided in an embodiment of this utility model;

[0039] Figure 5 This is a schematic diagram of the fifth power supply circuit provided in an embodiment of this utility model;

[0040] Figure 6 This is a schematic diagram of the sixth power supply circuit provided in an embodiment of this utility model;

[0041] Figure 7 This is a schematic diagram of the seventh power supply circuit provided in an embodiment of this utility model;

[0042] Figure 8 This is a schematic diagram of the first part of the eighth power supply circuit provided in the embodiment of this utility model;

[0043] Figure 9 This is a schematic diagram of the second part of the eighth power supply circuit provided in the embodiment of this utility model;

[0044] Figure 10 This is a schematic diagram of the third part of the eighth power supply circuit provided in the embodiment of this utility model.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1. Power conversion circuit; 11. Power input terminal; 12. Power output terminal; 13. Power enable terminal; 14. First transformer chip; 15. Second transformer chip; 16. First power output terminal; 17. Second power output terminal;

[0047] 2. Enable circuit; 21. First switching circuit; 22. Second switching circuit; 23. Voltage divider circuit; 24. Third switching circuit; 25. Button;

[0048] 3. Controller;

[0049] 4. Auxiliary power supply circuit; 41. Voltage divider resistors;

[0050] 5. External power supply. Detailed Implementation

[0051] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0052] Reference Figure 1 According to a first aspect of this application, a power supply circuit is provided, comprising a power conversion circuit 1, an enabling circuit 2, a controller 3, and an auxiliary power supply circuit 4. The power conversion circuit 1 includes a power input terminal 11, a power output terminal 12, and a power enabling terminal 13. The power input terminal 11 is used to connect to an external power source 5, the power conversion circuit 1 is used to convert the voltage of the external power source 5, and the power output terminal 12 is used to output an electrical energy signal after voltage conversion. The enabling circuit 2 is connected to the external power source 5 and the power enabling terminal 13, and is used to output a first enabling signal to the power enabling terminal 13 to control the power conversion circuit 1 to convert the voltage of the external power source 5. The controller 3 is connected to the power output terminal 12 and the enabling circuit 2, and is used to receive the electrical energy signal for operation, and to output a first control signal to the enabling circuit 2 to control the enabling circuit 2 to output the first enabling signal. The auxiliary power supply circuit 4 is connected to the power output terminal 12 and the enabling circuit 2. When the controller 3 does not output the first control signal, the auxiliary power supply circuit 4 can output a second control signal to the enabling circuit 2 to control the enabling circuit 2 to output the first enabling signal.

[0053] It is understood that the power input terminal 11 of the power conversion circuit 1 is connected to an external power source 5, enabling it to receive electrical energy from the external power source 5. Through an internal voltage conversion mechanism, it converts the voltage of the external power source 5 into a voltage suitable for system operation and outputs it from the power output terminal 12 to power components such as the controller 3. The power enable terminal 13 is used to control whether the power conversion circuit 1 operates. The power conversion circuit 1 will only start voltage conversion when the power enable terminal 13 receives the first enable signal. It should be noted that in this embodiment, the external power source 5 connected to the power conversion circuit 1 and the external power source 5 connected to the enable circuit 2 can be the same power source, such as the power supply battery of the energy storage system connected to both the power conversion circuit 1 and the enable circuit 2; or, the external power source 5 connected to the power conversion circuit 1 and the external power source 5 connected to the enable circuit 2 can be different power sources, such as the power supply battery of the energy storage system connected to the power conversion circuit 1, and the external power source 5 connected to the enable circuit 2 being the external power supply of the energy storage system.

[0054] Enable circuit 2 connects to external power supply 5 and power enable terminal 13, and is used to output a first enable signal to power enable terminal 13. The first enable signal is the start signal of power conversion circuit 1. The operating state of enable circuit 2 is affected by the first control signal output by controller 3 and the second control signal output by auxiliary power supply circuit 4. When either control signal is received, the first enable signal can be output.

[0055] After the controller 3 obtains power from the power output terminal 12, it begins to work. During normal operation, it outputs a first control signal to the enable circuit 2 to ensure that the enable circuit 2 continuously outputs the first enable signal, maintaining the normal operation of the power conversion circuit 1. However, when the controller 3 is in a special state such as reset, it cannot output the first control signal. The auxiliary power supply circuit 4 connects the power output terminal 12 and the enable circuit 2. When the controller 3 does not output the first control signal, such as during a program upgrade, the controller 3 is in a reset state, causing the relevant I / O ports to be in a high-impedance state. At this time, the auxiliary power supply circuit 4 can output a second control signal to the enable circuit 2, so that the enable circuit 2 continues to output the first enable signal, thereby ensuring that the power conversion circuit 1 does not stop working until the controller 3 upgrade is completed.

[0056] In some examples, by setting up an auxiliary power supply circuit 4, when the controller 3 is unable to output the first control signal due to reasons such as being in a reset state during a program upgrade, the auxiliary power supply circuit 4 can immediately intervene and output a second control signal to the enable circuit 2. This ensures that the enable circuit 2 continuously outputs the first enable signal to the power enable terminal 13, maintaining the normal operation of the power conversion circuit 1 and preventing the controller 3 from losing power. This solves the problem of power interruption caused by the controller 3 resetting during a program upgrade. In addition, through the coordinated work of the enable circuit 2, the controller 3, and the auxiliary power supply circuit 4, there is no need to manually press and hold the wake-up button 25 to maintain power supply, reducing the workload of manual operation. Especially when upgrading a large number of products, it can effectively improve work efficiency. At the same time, it avoids the need to open the box because the wake-up button 25 cannot be touched after product assembly, further improving the convenience of the upgrade process.

[0057] It is understood that in the power supply circuit described above, controller 3 is a control component used to receive the electrical energy signal output by power conversion circuit 1 and to output a first control signal to enable circuit 2 to control its output of a first enable signal. Controller 3 is an electronic component or circuit module with data processing and signal output functions, commonly including but not limited to microcontroller units (MCUs), single-chip microcomputers, and digital signal processors (DSPs).

[0058] Reference Figure 2 In some embodiments, the enabling circuit 2 further includes a first switching circuit 21, which is connected to the external power supply 5 and the power enable terminal 13. The first switching circuit 21 is used to output a second enabling signal to the enabling circuit 2 to control the power conversion circuit 1 to convert the voltage of the external power supply 5.

[0059] It is understandable that the first switching circuit 21 included in the enabling circuit 2 is directly connected to the external power supply 5 and the power enable terminal 13. This means that the first switching circuit 21 can directly obtain energy from the external power supply 5 and output a second enabling signal to the power enable terminal 13. It should be noted that one or more external power supplies 5 can be provided, and the external power supplies connected to each circuit can be the same or different. The second enabling signal here has a similar function to the first enabling signal; both can trigger the power conversion circuit 1 to start voltage conversion. However, the trigger source for the second enabling signal is the first switching circuit 21, which serves as a wake-up circuit. When the wake-up circuit is triggered (e.g., when the wake-up button 25 is manually pressed), it controls the first switching circuit 21 to conduct, thereby causing the first switching circuit 21 to output the second enabling signal.

[0060] When the system needs to wake up from a low-power state or start up initially, if the controller 3 does not output the first control signal and the auxiliary power supply circuit 4 is not engaged, the first switching circuit 21 can be activated by pressing the wake-up button 25. At this time, the first switching circuit 21 obtains power from the external power supply 5 and outputs the second enable signal to the power enable terminal 13, thereby controlling the power conversion circuit 1 to start, converting the voltage of the external power supply 5 and outputting it from the power output terminal 12 to power the controller 3. After the controller 3 starts up and outputs the first control signal, even if the wake-up button 25 is released and the first switching circuit 21 stops outputting the second enable signal, the enable circuit 2 can still output the first enable signal under the action of the first control signal, maintaining the operation of the power conversion circuit 1.

[0061] In some examples, by setting the first switching circuit 21, the power supply circuit has the function of manually waking up the system. When the auxiliary power supply circuit 4 fails or the controller 3 cannot start normally due to special circumstances, the first switching circuit 21 can be triggered by operating the wake-up circuit to output a second enable signal, ensuring that the power conversion circuit 1 can start working, thus improving the reliability of the power supply circuit.

[0062] Reference Figure 3 In some embodiments, the first switch circuit 21 includes a button 25, which is connected to an external power supply 5 and a power enable terminal 13. The button 25 is internally used to turn the external power supply 5 and the power enable terminal 13 on or off.

[0063] It is understood that the button 25 included in the first switching circuit 21 has one end connected to an external power supply 5 and the other end connected to a power enable terminal 13. The button 25 can switch between on and off states through mechanical action. When the button 25 is pressed, its internal contacts close, forming a path between the external power supply 5 and the power enable terminal 13. The electrical energy of the external power supply 5 can be transferred to the power enable terminal 13 through this path, which is equivalent to outputting a second enable signal to the power enable terminal 13. When the button 25 is not pressed, its internal contacts open, the path between the external power supply 5 and the power enable terminal 13 is cut off, and the second enable signal is no longer output. The button 25 can be the system wake-up button 25 mentioned in the background art, which enables direct control of the power enable terminal 13 through manual operation.

[0064] When the system needs to start or wake up, if the controller 3 does not output the first control signal and the auxiliary power supply circuit 4 is not working, the operator presses button 25. Button 25 is internally connected, and the external power supply 5 directly outputs the second enable signal to the power enable terminal 13 through button 25. This triggers the power conversion circuit 1 to start, converting the voltage of the external power supply 5 and outputting it from the power output terminal 12 to power the controller 3. After the controller 3 starts, it outputs the first control signal. Under the action of the first control signal, the enable circuit 2 continuously outputs the first enable signal. Even if button 25 is released and internally disconnected, the power enable terminal 13 can still receive the first enable signal, and the power conversion circuit 1 remains operational.

[0065] In some examples, by setting button 25 in the first switch circuit 21, the function of manually controlling the power enable terminal 13 is realized, providing a direct triggering method for system startup. Especially when the automatic control mechanism (controller 3 and auxiliary power supply circuit 4) is not started, it can be used as a backup startup method to ensure that the system can be woken up.

[0066] Reference Figure 4 In some embodiments, the power input terminal 11 is connected to multiple external power sources 5, one of which is used to supply power to the power input terminal 11.

[0067] It is understandable that the power input terminal 11 is connected to multiple external power sources 5, allowing the power supply circuit to access multiple different external power sources 5, such as batteries, energy storage devices, and AC power converters. However, in actual operation, multiple external power sources 5 do not supply power to the power input terminal 11 simultaneously. Instead, one external power source 5 is selected as the current power source to provide initial power to the power conversion circuit 1. This design enables the power supply circuit to switch to another external power source 5 when one external power source 5 fails or has insufficient power, ensuring a stable input to the power conversion circuit 1 and maintaining the basic operating conditions of the entire circuit system.

[0068] In some examples, multiple external power sources 5 are connected to the power input terminal 11 and one of them is selected for power supply, which enhances the reliability and adaptability of the power supply circuit. When the external power source 5 in use malfunctions (such as power failure or voltage instability), it can be quickly switched to another normal external power source 5, avoiding a power outage of the entire system due to a single power source failure. Especially during the upgrade of the energy storage battery system program, it can effectively prevent upgrade failure caused by power interruption and improve the system's risk resistance.

[0069] Reference Figure 5 In some embodiments, the power conversion circuit 1 is provided with multiple power output terminals 12, and the voltages of the power signals of at least two power output terminals 12 are different.

[0070] Understandably, the power conversion circuit 1 has multiple power output terminals 12, enabling it to simultaneously output multiple power signals, and at least two of the output terminals have different power signal voltages. This is because different components in the power supply circuit (such as the controller 3, auxiliary power supply circuit 4, enable circuit 2, etc.) require different voltages of power to function properly. For example, the controller 3 may require a low voltage (e.g., 3.3V) to ensure stable operation, while the enable circuit 2 or auxiliary power supply circuit 4 may require a higher voltage (e.g., 5V) to drive its internal components. The power conversion circuit 1 converts the voltage of the external power supply 5 and outputs voltage signals from the multiple power output terminals 12 to suit the different components, thereby meeting the power requirements of each part of the entire power supply circuit.

[0071] In some examples, by setting multiple power output terminals 12 with different voltages through the power conversion circuit 1, it is possible to provide precisely matched power to multiple components within the power supply circuit, avoiding component damage or malfunction caused by voltage mismatch. At the same time, it eliminates the need to configure a separate voltage conversion device for each component, simplifying the circuit structure, reducing the number of components, lowering the overall size and cost of the circuit, and improving the integration and practicality of the power supply circuit.

[0072] Reference Figure 5 In some embodiments, the plurality of power output terminals 12 include a first power output terminal 16 and a second power output terminal 17. The first power output terminal 16 is connected to the auxiliary power supply circuit 4 and is used to output power signals to the auxiliary power supply circuit 4. The second power output terminal 17 is connected to the controller 3 and is used to output power signals to the controller 3. The voltages of the power signals of the first power output terminal 16 and the second power output terminal 17 are different.

[0073] Understandably, among the multiple power output terminals 12 of the power conversion circuit 1, the first power output terminal 16 is connected to the auxiliary power supply circuit 4, providing power signals to the auxiliary power supply circuit 4 so that it can operate normally when the controller 3 does not output the first control signal; the second power output terminal 17 is connected to the controller 3, providing power signals to the controller 3 to ensure that the controller 3 can operate stably and output the first control signal. Since the operating voltage requirements of the auxiliary power supply circuit 4 and the controller 3 may be different, the power signal voltages of the first power output terminal 16 and the second power output terminal 17 are different. For example, the auxiliary power supply circuit 4 may need a higher voltage (such as 5V) to maintain the energy storage of the energy storage element (such as a capacitor), while the controller 3 may need a lower voltage (such as 3.3V) to ensure the stable operation of its internal circuits.

[0074] In some examples, by setting different voltages for the first power output terminal 16 and the second power output terminal 17, the required operating voltages for the auxiliary power supply circuit 4 and the controller 3 can be accurately provided, ensuring the normal operation of these two key components. This allows the auxiliary power supply circuit 4 to output a second control signal to the enable circuit 2 in special circumstances such as the controller 3 being reset, maintaining the operation of the power conversion circuit 1 and avoiding system power failure caused by the controller 3 being reset, thereby improving the stability and reliability of the power supply circuit.

[0075] Reference Figure 6 In some embodiments, the power conversion circuit 1 includes a first transformer chip 14 and a second transformer chip 15. The input terminal, enable terminal, and output terminal of the first transformer chip 14 serve as a power input terminal 11, a power enable terminal 13, and a first power output terminal 16, respectively. The input terminal of the second transformer chip 15 is connected to the first power output terminal 16, and the output terminal of the second transformer chip 15 serves as a second power output terminal 17. The first transformer chip 14 is used to transform the voltage of the external power supply 5 to output a first electrical signal, and the second transformer chip 15 is used to transform the voltage of the first electrical signal to output a second electrical signal.

[0076] It is understood that in some embodiments, the power conversion circuit 1 consists of a first transformer chip 14 and a second transformer chip 15, forming a cascaded voltage conversion structure. The input terminal of the first transformer chip 14 directly serves as the power input terminal 11 of the power conversion circuit 1, connecting to an external power supply 5 to obtain initial electrical energy; its enable terminal serves as the power enable terminal 13 of the power conversion circuit 1, receiving a first enable signal output by the enable circuit 2 or a second enable signal output by the first switching circuit 21. When the enable terminal is triggered, the first transformer chip 14 starts working, converting the voltage of the external power supply 5 into a first electrical signal, and outputting it from its output terminal (i.e., the first power output terminal 16). The input terminal of the second transformer chip 15 is connected to the first power output terminal 16, receiving the first electrical signal as input, and then, through its own voltage conversion function, converting the voltage of the first electrical signal into a second electrical signal, outputting it from its output terminal (i.e., the second power output terminal 17). Since the first and second electrical signals are obtained by different transformer chips, their voltages are different, and they are adapted to the voltage requirements of the auxiliary power supply circuit 4 (connected to the first power output terminal 16) and the controller 3 (connected to the second power output terminal 17), respectively.

[0077] In some examples, the cascaded design of the first transformer chip 14 and the second transformer chip 15 enables step-by-step conversion from the external power supply 5 to different voltage signals. The first transformer chip 14 first converts the voltage of the external power supply 5 into a first electrical signal adapted to the auxiliary power supply circuit 4, and the second transformer chip 15 then converts the first electrical signal into a second electrical signal adapted to the controller 3. This hierarchical conversion method can not only meet the voltage requirements of different components, but also unify the start-up of the entire power conversion circuit 1 through the enable terminal of the first transformer chip 14, ensuring the orderliness and stability of the voltage conversion process.

[0078] In addition, by connecting the input terminal of the second transformer chip 15 to the first power output terminal 16, the operation of the second transformer chip 15 depends on the output of the first transformer chip 14. When the first transformer chip 14 is not started, the second transformer chip 15 has no input power, thus avoiding unnecessary power consumption. When the first transformer chip 14 is started, the second transformer chip 15 can quickly output a second electrical signal to power the controller 3, further optimizing the power consumption control of the circuit. At the same time, the division of labor between the two independent transformer chips improves the accuracy and reliability of voltage conversion.

[0079] Reference Figure 7 In some embodiments, the auxiliary power supply circuit 4 is connected to the power output terminal 12 and the enable circuit 2, and is used to divide the voltage of the power output terminal 12 to output a second control signal to the enable circuit 2.

[0080] Understandably, the auxiliary power supply circuit 4 is connected to the power output terminal 12 (e.g., the first power output terminal 16) and can acquire the power output signal. The auxiliary power supply circuit 4 is connected to the enable circuit 2 and outputs a second control signal. The auxiliary power supply circuit 4 uses resistors and other components to divide the power signal, outputting the divided signal (the second control signal). When the controller 3 does not output the first control signal, the second control signal obtained by the auxiliary power supply circuit 4 can trigger the enable circuit 2 to output the first enable signal, maintaining the operation of the power conversion circuit 1. For example, when the voltage at the power output terminal 12 is 5V, the auxiliary power supply circuit 4 may use resistors to divide the voltage to approximately 0.7V, outputting a 0.7V second control signal to the enable circuit 2.

[0081] In some examples, the voltage divider function of the auxiliary power supply circuit 4 can convert the higher voltage at the power output terminal 12 into a control voltage suitable for the enable circuit 2, preventing damage to the enable circuit 2 due to excessive voltage. Simultaneously, the resistance parameters of the auxiliary power supply circuit 4 can be adjusted according to actual needs, thereby flexibly setting the voltage value of the second control signal to adapt to the operating requirements of different enable circuits 2, improving the versatility and adaptability of the auxiliary power supply circuit 4.

[0082] Reference Figure 7In some embodiments, the auxiliary power supply circuit 4 includes a plurality of voltage divider resistors 41 connected in series. One end of the plurality of voltage divider resistors 41 is connected to the power output terminal 12, and the other end is grounded. The enable circuit 2 is connected between two adjacent voltage divider resistors 41.

[0083] Understandably, the auxiliary power supply circuit 4 consists of multiple series voltage divider resistors 41. One end of these resistors is connected to the power output terminal 12 (such as the first power output terminal 16) to obtain the power signal, and the other end is grounded to form a reference potential. According to the voltage divider principle of series circuits, a voltage drop occurs when current flows through each resistor, resulting in a specific voltage value at the node between two adjacent resistors. The enable circuit 2 is connected to the node between two adjacent voltage divider resistors 41, and the voltage at this node is the second control signal obtained after voltage division. For example, refer to... Figure 10 If the voltage at power output terminal 12 is 5V, and two resistors (R11 and R12) are connected in series to divide the voltage, with R11 being 10KΩ and R12 being 62KΩ, then the voltage at the intermediate node is 0.7V. Connecting enable circuit 2 to this node will provide a 0.7V second control signal. By adjusting the resistance ratio of each voltage divider resistor 41, the voltage value of the second control signal can be precisely controlled to meet the operating requirements of enable circuit 2.

[0084] In some examples, a voltage divider circuit consisting of multiple series-connected voltage divider resistors 41 can stably divide the voltage at the power output terminal 12 to a control voltage suitable for the enable circuit 2. This pure resistive voltage divider method is simple in structure, low in cost, requires no additional power supply or control components, and has high reliability. When the controller 3 does not output the first control signal, the voltage divider circuit can immediately provide a stable second control signal, ensuring that the enable circuit 2 responds in a timely manner and maintains the normal operation of the power conversion circuit 1.

[0085] Furthermore, by adjusting the resistance values ​​of the voltage divider resistors 41, the enable circuit 2 can be flexibly adapted to different voltage requirements. For example, if the enable circuit 2 requires a 0.7V control signal, a suitable resistor value ratio can be calculated and selected to achieve precise voltage division. This configurability allows the same auxiliary power supply circuit 4 to be applied to various different power supply circuit designs, improving the circuit's versatility and compatibility.

[0086] Reference Figures 8 to 10In some embodiments, the enabling circuit 2 includes a second switching circuit 22 and a third switching circuit 24. The second switching circuit 22 includes a first input terminal, a first output terminal, and a first enabling terminal. The first input terminal is connected to an external power supply 5, and the first output terminal is connected to a power enabling terminal 13. The third switching circuit 24 includes a second input terminal, a second output terminal, and a second enabling terminal. The second input terminal is connected to the first enabling terminal, and the second enabling terminal is connected to the controller 3 and the auxiliary power supply circuit 4. The second output terminal is grounded. The controller 3 or the auxiliary power supply circuit 4 controls the third switching circuit 24 to conduct. The conduction of the third switching circuit 24 controls the conduction of the second switching circuit 22. The conduction of the second switching circuit 22 connects the external power supply 5 and the power enabling terminal 13, and is used to output a first enabling signal to the power enabling terminal 13.

[0087] It is understandable that the second switching circuit 22 and the third switching circuit 24 in the enabling circuit 2 work together to form a controlled power enabling control mechanism. When the controller 3 or the auxiliary power supply circuit 4 outputs a valid control signal, it will trigger the third switching circuit 24 to conduct. After the third switching circuit 24 conducts, the first enabling terminal receives a suitable voltage to conduct the second switching circuit 22. After the second switching circuit 22 conducts, a path is formed between the external power supply 5 and the power enabling terminal 13. The electrical energy of the external power supply 5 is transferred to the power enabling terminal 13 through the second switching circuit 22, outputting the first enabling signal, thereby starting the power conversion circuit 1 to work.

[0088] Understandably, the second switching circuit 22 and the third switching circuit 24 are constructed using transistors, utilizing the switching characteristics of the transistors to control the circuit's on and off states. As a semiconductor device, a transistor has three terminals: base (B), collector (C), and emitter (E). When the voltage between the base and emitter reaches a certain threshold (approximately 0.7V for a silicon transistor), the transistor conducts, forming a path between the collector and emitter; conversely, it is cut off when the voltage drops below this threshold.

[0089] In some examples, through the coordinated operation of this two-stage switching circuit structure, enable circuit 2 can precisely control the startup of power conversion circuit 1 based on the control signals from controller 3 or auxiliary power supply circuit 4, achieving effective control of the power enable terminal 13. Furthermore, this structure of enable circuit 2 allows controller 3 to control power enable when it is operating normally, while in abnormal situations such as controller 3 reset, auxiliary power supply circuit 4 takes over control, ensuring continuous operation of power conversion circuit 1. This dual control mechanism improves the reliability of the power supply circuit, making it particularly suitable for energy storage battery systems that require frequent program upgrades, avoiding upgrade failures caused by MCU resets.

[0090] In some examples, refer to Figures 8 to 10The enable circuit 2 also includes a voltage divider circuit 23, which is connected to the first input terminal, the first enable terminal, and the second input terminal. When the third switch circuit 24 is turned on, the voltage divider circuit 23 is used to divide the voltage of the first enable terminal, so that the second switch circuit 22 is turned on.

[0091] After the third switching circuit 24 is turned on, the voltage divider circuit 23 starts working, dividing the voltage at the first enable terminal of the second switching circuit 22 so that the first enable terminal receives a suitable voltage to turn on the second switching circuit 22. Through the cooperation of the voltage divider circuit 23 and the first switching circuit 21, the stability and anti-interference capability of the circuit are enhanced. According to a second aspect of this application, an electronic device is provided, which includes the above-described power supply circuit and has all the technical effects of the above-described power supply circuit, which will not be repeated here.

[0092] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A power supply circuit, characterized in that, include: The power conversion circuit (1) includes a power input terminal (11), a power output terminal (12) and a power enable terminal (13). The power input terminal (11) is used to connect to an external power source (5). The power conversion circuit (1) is used to convert the voltage of the external power source (5). The power output terminal (12) is used to output the electrical energy signal after the voltage conversion. The enabling circuit (2) is connected to the external power supply (5) and the power enable terminal (13) and is used to output a first enabling signal to the power enable terminal (13) to control the power conversion circuit (1) to convert the voltage of the external power supply (5); The controller (3) is connected to the power output terminal (12) and the enabling circuit (2), and is used to receive the power signal to work, and to output a first control signal to the enabling circuit (2) to control the enabling circuit (2) to output the first enabling signal. The auxiliary power supply circuit (4) is connected to the power output terminal (12) and the enable circuit (2). When the controller (3) does not output the first control signal, the auxiliary power supply circuit (4) can output the second control signal to the enable circuit (2) to control the enable circuit (2) to output the first enable signal.

2. The power supply circuit according to claim 1, characterized in that, The enabling circuit (2) further includes a first switching circuit (21), which is connected to the external power supply (5) and the power enable terminal (13). The first switching circuit (21) is used to output a second enabling signal to the enabling circuit (2) to control the power conversion circuit (1) to convert the voltage of the external power supply (5).

3. The power supply circuit according to claim 2, characterized in that, The first switching circuit (21) includes a button (25), which is connected to the external power supply (5) and the power enable terminal (13). The button (25) is internally used to turn on or off the external power supply (5) and the power enable terminal (13).

4. The power supply circuit according to any one of claims 1-3, characterized in that, The power input terminal (11) is connected to a plurality of external power sources (5), one of which is used to supply power to the power input terminal (11).

5. The power supply circuit according to any one of claims 1-3, characterized in that, The power conversion circuit (1) is provided with a plurality of power output terminals (12), and the voltage of the power signal at at least two of the power output terminals (12) is different.

6. The power supply circuit according to claim 5, characterized in that, The plurality of power output terminals (12) include: The first power output terminal (16) is connected to the auxiliary power supply circuit (4) and is used to output the power signal to the auxiliary power supply circuit (4); The second power output terminal (17) is connected to the controller (3) and is used to output the power signal to the controller (3). The voltages of the power signals of the first power output terminal (16) and the second power output terminal (17) are different.

7. The power supply circuit according to claim 6, characterized in that, The power conversion circuit (1) includes: The first transformer chip (14) has its input terminal, enable terminal and output terminal serving as the power input terminal (11), the power enable terminal (13) and the first power output terminal (16), respectively. The second transformer chip (15) has its input terminal connected to the first power output terminal (16) and its output terminal serving as the second power output terminal (17). The first transformer chip (14) is used to transform the voltage of the external power supply (5) to output a first electrical signal, and the second transformer chip (15) is used to transform the voltage of the first electrical signal to output a second electrical signal.

8. The power supply circuit according to any one of claims 1-3, characterized in that, The auxiliary power supply circuit (4) is used to divide the voltage at the power output terminal (12) to output the second control signal to the enable circuit (2).

9. The power supply circuit according to claim 8, characterized in that, The auxiliary power supply circuit (4) includes multiple series-connected voltage divider resistors (41), one end of which is connected to the power output terminal (12) and the other end is grounded. The enable circuit (2) is connected between two adjacent voltage divider resistors (41).

10. The power supply circuit according to any one of claims 1-3, characterized in that, The enabling circuit (2) includes: The second switching circuit (22) includes a first input terminal, a first output terminal and a first enable terminal. The first input terminal is connected to the external power supply (5) and the first output terminal is connected to the power enable terminal (13). The third switching circuit (24) includes a second input terminal, a second output terminal, and a second enable terminal. The second input terminal is connected to the first enable terminal, the second enable terminal is connected to the controller (3) and the auxiliary power supply circuit (4), and the second output terminal is grounded. The controller (3) or the auxiliary power supply circuit (4) controls the third switch circuit (24) to be turned on. The turn on of the third switch circuit (24) controls the second switch circuit (22) to be turned on. The turn on of the second switch circuit (22) connects the external power supply (5) and the power enable terminal (13) to output a first enable signal to the power enable terminal (13).

11. The power supply circuit according to claim 10, characterized in that, The enabling circuit (2) further includes a voltage divider circuit (23), which is connected to the first input terminal, the first enabling terminal and the second input terminal. When the third switching circuit (24) is turned on, the voltage divider circuit (23) is used to divide the voltage of the first enabling terminal, so that the second switching circuit (22) is turned on.

12. An electronic device, characterized in that, Includes the power supply circuit as described in any one of claims 1-11.

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